CN115979135B - Linear guide rail circular arc groove center distance measuring device - Google Patents
Linear guide rail circular arc groove center distance measuring device Download PDFInfo
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- CN115979135B CN115979135B CN202310047713.2A CN202310047713A CN115979135B CN 115979135 B CN115979135 B CN 115979135B CN 202310047713 A CN202310047713 A CN 202310047713A CN 115979135 B CN115979135 B CN 115979135B
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Abstract
The application discloses a linear guide rail circular arc groove center distance measuring device, which comprises: and (3) a lathe bed. And the tool device is arranged on the lathe bed and used for fixing the tested guide rail. The first measuring device is movably connected with the lathe bed. And the second measuring device is in sliding connection with the first measuring device, and the sliding direction is along the width direction of the guide rail to be measured. Is arranged opposite to the first measuring device. And the X-direction driving device is in driving connection with the first measuring device and in driving connection with the second measuring device and is used for driving the first measuring device to slide relative to the second measuring device. And the driving assembly is in driving connection with the first measuring device and is used for driving the first measuring device to move along the height direction of the guide rail to be measured. And the Z-direction driving device is in driving connection with the first measuring device. The method for replacing the large steel ball and the small steel ball by the sliding block is not needed, so that time and labor are saved.
Description
Technical Field
The application relates to the technical field of measuring equipment, in particular to a device for measuring the center distance of a linear guide rail circular arc groove.
Background
With the development of the numerical control machine tool in the direction of high speed and precision, the linear guide rail which is one of the basic functional components of the machine tool is required to be higher. The linear guide rail is a commonly used functional component in the field of mechanical engineering, and the center distance parameter of the arc groove of the guide rail has a decisive influence on the overall precision of equipment.
At present, the measurement of the size of the circular arc groove is carried out by adopting a cylindrical gear micrometer with a ball head to carry out batch measurement, and the initial detection and the spot check measurement are carried out by using a manual imager, and the method of replacing the large steel ball and the small steel ball by adopting a sliding block is adopted, so that the pretightening force of the sliding block and the guide rail after assembly is kept within a certain range.
According to the method, the pretightening force between the sliding block and the guide rail is required to be adjusted before measurement, steel balls with different sizes are required to be replaced frequently, time and labor are wasted, in addition, the measurement error of the center distance dimension precision of the single sliding block guide rail is large, the dimension grades cannot be finely divided, and batch assembly is difficult.
Disclosure of Invention
Aiming at the technical problems, the application provides a linear guide rail circular arc groove center distance measuring device, which comprises:
and (3) a lathe bed.
And the tool device is arranged on the lathe bed and used for fixing the tested guide rail.
The first measuring device is movably connected with the lathe bed.
The second measuring device is movably connected with the lathe bed, is in sliding connection with the first measuring device, and the sliding direction is along the width direction of the guide rail to be measured. Is arranged opposite to the first measuring device.
And the X-direction driving device is in driving connection with the first measuring device and in driving connection with the second measuring device and is used for driving the first measuring device to slide relative to the second measuring device, so that the distance between the first measuring device and the second measuring device is adjusted according to the width of the measured guide rail.
The driving assembly is in driving connection with the first measuring device and is used for driving the first measuring device to move along the height direction of the guide rail to be measured, so that the first measuring device and the second measuring device move to two sides of the guide rail to be measured.
And the Z-direction driving device is in driving connection with the first measuring device and is used for driving the first measuring device to move along the length direction of the guide rail to be measured, so that the first measuring device moves to different positions on the length of the guide rail to be measured.
Compared with the prior art, the application has the following advantages: when the groove sizes at two sides of the guide rail are measured, the guide rail to be measured is fixed on the tool device, the positioning of the guide rail to be measured is finished, the standard quick elimination device is utilized to measure errors, the measuring precision of the device is calibrated, the accuracy of measured data in the process of measuring the guide rail is guaranteed, the X-direction driving device drives the first measuring device to slide relative to the second measuring device, the distance between the first measuring device and the second measuring device is regulated, the driving assembly drives the first measuring device and the second measuring device to move along the height direction of the guide rail to be measured and move to two sides of the guide rail to be measured, the first measuring device and the second measuring device are used for measuring the outlines at two sides of the guide rail to be measured, the Z-direction driving device is used for driving the first measuring device to move along the length direction of the guide rail to be measured, and the first measuring device and the second measuring device move along the length direction of the guide rail to be measured. The method for replacing the large steel ball and the small steel ball by the sliding block is not needed, the pretightening force between the sliding block and the guide rail is not needed to be regulated, the steel ball replacement is not needed, time and labor are saved, the precision of the first measuring device and the measuring device is high, the size grades can be finely divided, and batch assembly can be carried out.
Further preferably, the Z-direction driving device includes:
and the Z-direction screw rod is rotationally connected with the lathe bed, and the length direction of the Z-direction screw rod is arranged along the length direction of the tested guide rail.
The first sliding block is in threaded connection with the Z-direction screw rod and is in sliding connection with the lathe bed, and the first measuring device and the second measuring device are installed on the first sliding block.
The first driving piece is in driving connection with the Z-direction screw rod and is used for driving the Z-direction screw rod to rotate.
By adopting the technical scheme, the first driving piece drives the Z-direction screw rod to rotate, the Z-direction screw rod drives the first sliding block to slide, and the first sliding block drives the first measuring device and the second measuring device to move along the length direction of the guide rail to be measured.
Further preferably, the driving assembly includes:
and the Y-direction screw rod is rotationally connected with the first sliding block, and the length direction of the Y-direction screw rod is arranged along the height direction of the tested guide rail.
The second sliding block is in threaded connection with the Y-direction screw rod and is in sliding connection with the first sliding block, and the first measuring device and the second measuring device are installed on the second sliding block.
The second driving piece is in driving connection with the Y-direction screw rod and is used for driving the Y-direction screw rod to rotate.
By adopting the technical scheme, the second driving piece drives the Y-direction screw rod to rotate, the Y-direction screw rod drives the second sliding block to slide, and the second sliding block drives the first measuring device and the second measuring device to move along the height direction of the guide rail to be measured, so that the first measuring device and the second measuring device move to two sides of the guide rail to be measured.
Further preferably, the X-direction driving device includes:
and the cylindrical gear is rotationally connected with the second sliding block, and the rotating shaft of the cylindrical gear is arranged along the height direction of the tested guide rail.
The first rack is in sliding connection with the second sliding block, the sliding direction is arranged along the width direction of the tested guide rail, and the first rack is fixedly connected with the first measuring device.
And the second rack is in sliding connection with the second sliding block, and the sliding direction is arranged along the width direction of the tested guide rail and is fixedly connected with the second measuring device.
And the third driving piece is in driving connection with the cylindrical gear and is used for driving the cylindrical gear to rotate.
The first rack and the second rack are positioned on two sides of the cylindrical gear.
By adopting the technical scheme, the third driving piece drives the cylindrical gear to rotate, the cylindrical gear drives the first rack to slide, the cylindrical gear drives the second rack to slide, the sliding direction of the first rack is opposite to that of the second rack, the first rack drives the first measuring device to slide close to or far away from the second measuring device, and the second rack drives the second measuring device to slide close to or far away from the first measuring device, so that the approaching and the far away movement of the first measuring device and the second measuring device are realized.
Further preferably, the Z-direction driving device further includes:
and the Z-direction grating ruler is fixedly connected with the lathe bed, and the length direction of the Z-direction grating ruler is arranged along the sliding direction of the first sliding block.
And the Z-direction reading head is fixedly connected with the first sliding block and matched with the Z-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the first sliding block, so that the moving precision of the first measuring device and the second measuring device along the length direction of the guide rail is improved.
Further preferably, the driving assembly further includes:
the Y-direction grating ruler is fixedly connected with the first sliding block, and the length direction is set along the sliding direction of the second sliding block.
And the Y-direction reading head is fixedly connected with the second sliding block and matched with the Y-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the second sliding block, so that the moving precision of the first measuring device and the second measuring device along the height direction of the guide rail is improved.
Further preferably, the X-direction driving device further includes:
and the X-direction grating ruler is fixedly connected with the second sliding block, and the length direction is arranged along the sliding direction of the first measuring device.
The X-direction reading head is fixedly connected with the first measuring device and matched with the X-direction grating ruler.
By adopting the technical scheme, the grating ruler can improve the moving precision of the first measuring device, so that the moving precision of the first measuring device and the second measuring device along the width direction of the guide rail is improved.
Further preferably, the tooling device includes:
the electromagnetic chuck is fixedly connected to the lathe bed, is in contact fit with the bottom surface of the tested guide rail and is used for adsorbing the tested guide rail.
And the stop block is connected with the lathe bed in a sliding manner and is in abutting fit with one side of the tested guide rail in the width direction.
The positioning block is connected with the lathe bed in a sliding manner and is in butt fit with the other side of the detected guide rail in the width direction.
The driving assembly is in driving connection with the stop block, is in driving connection with the positioning block and is used for driving the stop block to be close to the positioning block, so that the guide rail to be tested is clamped, and positioning of the guide rail to be tested is completed.
The two stop blocks are arranged, the two positioning blocks are arranged, the two driving assemblies are arranged in two groups, the two stop blocks are arranged at intervals, the two positioning blocks are arranged at intervals, the guide rail to be measured is positioned from two positions in the length direction of the guide rail to be measured, and the positioning accuracy is improved.
By adopting the technical scheme, when the guide rail to be detected is positioned, the bottom surface of the guide rail to be detected is placed on the electromagnetic chuck, the guide rail to be detected is adsorbed by the electromagnetic chuck, the driving assembly drives the positioning block and the stop block to move close to each other, the guide rail to be detected is clamped, and the positioning of the guide rail to be detected is completed.
Further preferably, the first measuring device is a laser displacement sensor, and the second measuring device is a laser displacement sensor.
Further preferably, the method further comprises:
the standard block is fixedly connected with the lathe bed, can be replaced according to the measured guide rails with different width sizes, and positions the distance between the second measuring devices of the first measuring device so as to improve the measuring precision.
In summary, compared with the prior art, the application has the following beneficial effects: during measurement, a measurement coordinate system O-X-Y-Z is set firstly, the X direction is the width direction of a guide rail, the Y direction is the height direction of the guide rail, the Z direction is the length direction of the guide rail, the origin is the midpoint of the intersection line of the bottom surface of the guide rail and the cross section, the guide rail 4 to be measured is fixed on a tool device to finish positioning of the guide rail to be measured, meanwhile, before measurement, a measurement system performs measurement calibration in the X direction, a measurement standard block eliminates measurement errors of a device, the measurement precision of a device is calibrated, the accuracy of measured data in the measurement of the guide rail is ensured, the sum of measurement distance values of a first measurement device and a second measurement device is the sum of the width values of a gauge block, measurement calibration is finished, the measurement system moves upwards in the Y direction, a first driving piece is started, the measurement system moves in the Z direction, stays to a certain section of the guide rail to be measured, the measurement system moves downwards in the Y direction, scanning type measurement is performed, the measurement system moves in the Z direction, the left profile distance parameter and the right profile distance parameter of the cross section of the linear guide rail are obtained, and the measurement steps are repeated in different sections of the guide rail to finish measurement of a plurality of sections, and the measurement steps are recorded by a Z-direction grating coordinate. During Z dwell, the laser displacement sensor thereon is moved in the Y direction, scanning the track race profile, and recording the profile X coordinates. Its profile Y coordinates are recorded by Y-direction grating ruler 37. The track profile coordinate values of all sections of the guide rail can be obtained, and finally, the center point coordinate of the track is obtained after the least square fitting calculation is performed on one quarter of the circular arcs, so that the center distance parameter condition of the circular arc grooves of all sections of the guide rail can be calculated.
Drawings
Fig. 1 is a schematic structural view of the present embodiment;
FIG. 2 is a schematic structural view of an X-direction driving device;
FIG. 3 is a schematic view of a Y-direction driving device;
FIG. 4 is a schematic view of the structure of the Z-direction driving device;
FIG. 5 is a schematic structural view of the tooling device;
FIG. 6 is a schematic diagram of the structure of the rail under test;
FIG. 7 is an enlarged view of a portion of FIG. 4 at A;
reference numerals: 1-a base; 2-a lathe bed; 3-an electromagnetic chuck; 4-a guide rail to be tested; 5-Z direction screw rods; 6-Z direction grating ruler; 7-a drive assembly; 8-double guide rails; 9-mounting rack; 10-a first measuring device; 101-a second measuring device; 11-X direction reading head; 12-a first slider; 13-a second drive member; 14-a first driving member; 15-Z direction motor rack; a 16-X direction grating; 17-measuring rack; 18-a transmission shaft; 19-flexible coupling; 20-a motor frame; 21-a third driving member; 22-cylindrical gear; 23-a first rack; 231-a second rack; 24-connecting blocks; 25-X direction slide block; 26-X direction guide rail; 27-a substrate; 28-a measuring instrument bracket; 29-Y direction coupling; 30-supporting seats; 31-a second slider; 32-Y direction screw rods; 33-Y direction limit magnets; 34-Y direction read head; a 35-Y direction bracket; 37-Y direction grating ruler; 38-Y direction slide block; 39-Y direction nut seat; 40-Y guide rail; 41-Z-direction limiting magnets; 42-Z direction reading head; a 43-Z slider; 44-Z direction nut seat; 45-Z direction coupling; 46-standard blocks; 47-positioning a slide block; 49-positioning blocks; 50-stop.
Detailed Description
The application is described in further detail below with reference to fig. 1-7.
With the development of the numerical control machine tool in the direction of high speed and precision, the linear guide rail which is one of the basic functional components of the machine tool is required to be higher. The linear guide rail is a commonly used functional component in the field of mechanical engineering, and the center distance parameter of the arc groove of the guide rail has a decisive influence on the overall precision of equipment.
At present, the measurement of the size of the circular arc groove is carried out by adopting a cylindrical gear micrometer with a ball head to carry out batch measurement, and the initial detection and the spot check measurement are carried out by using a manual imager, and the method of replacing the large steel ball and the small steel ball by adopting a sliding block is adopted, so that the pretightening force of the sliding block and the guide rail after assembly is kept within a certain range. According to the method, the pretightening force between the sliding block and the guide rail is required to be adjusted before measurement, steel balls with different sizes are required to be replaced frequently, time and labor are wasted, in addition, the measurement error of the center distance dimension precision of the single sliding block guide rail is large, the dimension grades cannot be finely divided, and batch assembly is difficult.
Based on the technical problems, the applicant carries out the following technical scheme conception:
the guide rail to be measured is fixed at a determined position by using the tool device, and the measuring device is driven to move along the height direction and the length direction of the guide rail to be measured by the driving device, so that the whole dimension of the groove of the guide rail to be measured is measured.
Based on the above conception, the applicant proposes a technical scheme of the application, which is specifically as follows:
the linear guide circular arc groove center distance measuring device, as shown in fig. 1, 2, 3, 4, 5, 6 and 7, includes: and a bed 2. The tool device is arranged on the lathe bed 2 and used for fixing the tested guide rail 4. The first measuring device 10 is movably connected with the lathe bed 2. The second measuring device 101 is movably connected with the lathe bed 2, and is slidably connected with the first measuring device 10, and the sliding direction is along the width direction of the tested guide rail 4. Is arranged opposite to said first measuring means 10. The X-direction driving device is in driving connection with the first measuring device 10 and in driving connection with the second measuring device 101 and is used for driving the first measuring device 10 to slide relative to the second measuring device 101, so that the distance between the first measuring device 10 and the second measuring device 101 is adjusted according to the width of the measured guide rail 4. The driving assembly is in driving connection with the first measuring device 10 and is used for driving the first measuring device 10 to move along the height direction of the guide rail 4 to be measured, so that the first measuring device 10 and the second measuring device 101 move to two sides of the guide rail 4 to be measured. And the Z-direction driving device is in driving connection with the first measuring device 10 and is used for driving the first measuring device 10 to move along the length direction of the guide rail 4 to be measured, so that the first measuring device 10 moves to different positions on the length of the guide rail 4 to be measured.
When the groove sizes at the two sides of the guide rail are measured, the guide rail 4 to be measured is fixed on a tool device, the positioning of the guide rail 4 to be measured is finished, the measuring error of a standard quick eliminating device is utilized, the measuring precision of a device is calibrated, the accuracy of measured data in the process of measuring the guide rail is guaranteed, an X-direction driving device drives a first measuring device 10 to slide relative to a second measuring device 101, the distance between the first measuring device 10 and the second measuring device 101 is regulated, a driving component drives the first measuring device 10 and the second measuring device 101 to move along the height direction of the guide rail 4 to be measured to the two sides of the guide rail to be measured, the first measuring device 10 and the second measuring device 101 are used for measuring the outlines at the two sides of the guide rail 4 to be measured, a Z-direction driving device is used for driving the first measuring device 10 to move along the length direction of the guide rail 4 to be measured, the first measuring device 10 is moved to different positions on the length of the guide rail 4 to be measured, and the first measuring device 10 and the second measuring device 101 move along the length direction of the guide rail 4 to be measured. The method for replacing the large steel ball and the small steel ball by the sliding block is not needed, the pretightening force between the sliding block and the guide rail is not needed to be regulated, the steel ball replacement is not needed, time and labor are saved, the precision of the first measuring device and the measuring device is high, the size grades can be finely divided, and batch assembly can be carried out.
Specifically, the Z-direction driving device includes: and the Z-direction screw rod 5 is rotationally connected with the lathe bed 2, and the length direction of the Z-direction screw rod is arranged along the length direction of the tested guide rail 4. The first slider 12 is in threaded connection with the Z-direction screw 5 and is in sliding connection with the lathe bed 2, and the first measuring device 10 and the second measuring device 101 are mounted on the first slider 12. The first driving piece 14 is in driving connection with the Z-direction screw rod 5 and is used for driving the Z-direction screw rod 5 to rotate. The first driving piece 14 drives the Z-direction screw rod 5 to rotate, the Z-direction screw rod 5 drives the first sliding block 12 to slide, and the first sliding block 12 drives the first measuring device 10 and the second measuring device 101 to move along the length direction of the measured guide rail 4.
Specifically, the drive assembly includes: and the Y-direction screw rod 32 is rotationally connected with the first sliding block 12, and the length direction of the Y-direction screw rod is arranged along the height direction of the tested guide rail 4. The second slider 31 is screwed to the Y-direction screw 32 and slidably connected to the first slider 12, and the first measuring device 10 and the second measuring device 101 are mounted on the second slider 31. The second driving piece 13 is in driving connection with the Y-direction screw rod 32 and is used for driving the Y-direction screw rod 32 to rotate. The second driving piece 13 drives the Y-direction screw rod 32 to rotate, the Y-direction screw rod 32 drives the second sliding block 31 to slide, and the second sliding block 31 drives the first measuring device 10 and the second measuring device 101 to move along the height direction of the guide rail 4 to be measured, so that the first measuring device 10 and the second measuring device move to two sides of the guide rail 4 to be measured.
Specifically, the X-direction driving device includes: the cylindrical gear 22 is rotatably connected with the second slider 31, and its rotation axis is disposed along the height direction of the tested guide rail 4. The first rack 23 is slidably connected with the second slider 31, and the sliding direction is set along the width direction of the tested guide rail 4 and is fixedly connected with the first measuring device 10. The second rack 231 is slidably connected to the second slider 31, and the sliding direction is set along the width direction of the tested rail 4, and is fixedly connected to the second measuring device 101. And the third driving piece 21 is in driving connection with the cylindrical gear 22 and is used for driving the cylindrical gear 22 to rotate. The first rack 23 and the second rack 231 are located at both sides of the cylindrical gear 22. The third driving piece 21 drives the cylindrical gear 22 to rotate, the cylindrical gear 22 drives the first rack 23 to slide, the cylindrical gear 22 drives the second rack 231 to slide, the sliding direction of the first rack 23 is opposite to that of the second rack 231, the first rack 23 drives the first measuring device 10 to slide close to or far away from the second measuring device 101, and the second rack 231 drives the second measuring device 101 to slide close to or far away from the first measuring device 10, so that the approaching and separating movement of the first measuring device 10 and the second measuring device 101 is realized.
Specifically, the Z-direction driving device further includes: the Z-direction grating ruler 6 is fixedly connected with the lathe bed 2, and the length direction is set along the sliding direction of the first sliding block 12. The Z-direction reading head 42 is fixedly connected with the first slider 12 and is matched with the Z-direction grating scale 6. The grating scale can improve the moving accuracy of the first slider 12, thereby improving the moving accuracy of the first measuring device 10 and the second measuring device 101 in the length direction of the guide rail.
Specifically, the drive assembly further includes: the Y-direction grating ruler 37 is fixedly connected to the first slider 12, and is provided along the sliding direction of the second slider 31 in the longitudinal direction. The Y-direction reading head 34 is fixedly connected with the second slider 31 and is matched with the Y-direction grating ruler 37. The grating scale can improve the moving accuracy of the second slider 31, thereby improving the moving accuracy of the first measuring device 10 and the second measuring device 101 in the rail height direction.
Specifically, the X-direction driving device further includes: the X-direction grating scale 16 is fixedly connected to the second slider 31, and the length direction thereof is set along the sliding direction of the first measuring device 10. The X-direction reading head 11 is fixedly connected with the first measuring device 10 and is matched with the X-direction grating ruler 16. The grating scale can improve the movement accuracy of the first measuring device 10, thereby improving the movement accuracy of the first measuring device 10 and the second measuring device 101 in the rail width direction.
Specifically, the tool device includes: placing the tooling device comprises: and the electromagnetic chuck 3 is fixedly connected to the lathe bed 2, is in contact fit with the bottom surface of the tested guide rail 4 and is used for adsorbing the tested guide rail 4. And a stopper 50 slidably connected to the bed 2 and engaged with one side of the rail 4 in the width direction. The positioning block 49 is slidably connected to the bed 2, and is in abutting engagement with the other side of the detected guide rail 4 in the width direction. The driving assembly 7 is in driving connection with the stop block 50, is in driving connection with the positioning block 49, and is used for driving the stop block 50 to be close to the positioning block 49, so as to clamp the tested guide rail 4, and positioning the tested guide rail 4 is completed. When the guide rail to be measured is positioned, the bottom surface of the guide rail to be measured 4 is placed on the electromagnetic chuck 3, the guide rail to be measured 4 is absorbed by the electromagnetic chuck 3, the driving assembly 7 drives the positioning block 49 and the stop block 50 to move close to each other, the guide rail to be measured 4 is clamped, and the positioning of the guide rail to be measured 4 is completed. The two stop blocks are arranged, the two positioning blocks are arranged, the two driving assemblies are arranged in two groups, the two stop blocks are arranged at intervals, the two positioning blocks are arranged at intervals, the guide rail to be measured is positioned from two positions in the length direction of the guide rail to be measured, and the positioning accuracy is improved.
Specifically, the first measuring device 10 is a laser displacement sensor, and the second measuring device 101 is a laser displacement sensor.
Specifically, the method further comprises the following steps: the standard block 46 is fixedly connected with the lathe bed 2, and can be replaced according to the tested guide rails 4 with different width sizes, so as to position the distance between the first measuring device 10 and the second measuring device 101, and improve the measuring precision.
Specifically, referring to fig. 1, a linear guide rail arc groove center distance measuring device includes a first measuring device 10, a second measuring device 101, an X-direction driving device, a driving assembly, a Z-direction driving device, and a tooling device.
Specifically, referring to fig. 2, the X-direction driving device includes a third driving part 21, the third driving part 21 is fixed on the X-direction motor frame 20, two ends of the X-direction motor frame 20 are connected with the measurement frame 17, a flexible coupling 19 is adopted between the third driving part 21 and the transmission shaft 18, the transmission shaft 18 and the cylindrical gear 22 adopt key transmission, the cylindrical gear 22 is meshed with the double racks, the double racks are respectively connected with two connecting blocks 24, the connecting blocks 24 are connected with the X-direction sliding block 25, the X-direction sliding block 25 is connected with the X-direction guide rail 26, the X-direction guide rail 26 is mounted on the substrate 27, two ends of the substrate 27 are connected with the measurement frame 17, the X-direction grating ruler 16 is mounted on the outer surface of the substrate 27, the measuring instrument support 28 is connected with the connecting blocks 24, the X-direction reading head 11 is mounted on the upper end of the measuring instrument support 28 and corresponds to the X-direction grating ruler 16, laser displacement sensors are mounted under the X-direction reading head 11, the two laser displacement sensors are symmetrically distributed, and respectively driven by the cylindrical gear 22 to move the double racks, and synchronous movement and distance output in the X-direction are realized.
Specifically, referring to fig. 3, the driving assembly includes a second driving member 13, the second driving member 13 is connected with a second slider 31, a Y-directional screw rod 32 is connected with the second driving member 13 by a Y-directional coupler 29, the Y-directional screw rod 32 is connected with a supporting seat 30, the Y-directional screw rod 32 is protected, the deformation of the Y-directional screw rod 32 is reduced, the supporting seat 30 is fixed with the second slider 31, the Y-directional screw rod 32 is matched with a Y-directional nut seat 39, the Y-directional nut seat 39 is fixed with the second slider 31, the second slider 31 is connected with symmetrically arranged Y-directional sliders 38, the two Y-directional sliders 38 are connected with two Y-directional guide rails 40, the two Y-directional guide rails 40 are fixed on the second slider 31 and are symmetrically distributed, the movement of the Y-directional sliders 38 on the Y-directional guide rails 40 is realized, two Y-directional grating scales 37 are mounted on the side of the second slider 31 up and down, the over travel is avoided, one end of the second slider 31 is connected with a Y-directional bracket 35, the Y-directional reading head 34 is fixed on the Y-directional bracket 35, and the Y-directional grating distance is correspondingly output in the Y-directional grating directions with the Y-directional reading head 37.
Specifically, referring to fig. 4, the Z-direction movement measurement mechanism includes a machine body 2 connected to a base 1, a Z-direction motor frame 15 fixed to the machine body 2, a first driving member 14 fixed to the Z-direction motor frame 15, a Z-direction screw rod 5 connected to the first driving member 14 by a Z-direction coupling 45, a Z-direction screw rod 5 connected to a Z-direction nut seat 44, a Z-direction nut seat 44 connected to the first slider 12, one end of the first slider 12 connected to a driving assembly, and the other end of the first slider 12 respectively connected to two Z-direction sliders 43, the two Z-direction sliders 43 being symmetrically distributed on an inner surface of the machine body 2, the Z-direction sliders 43 being matched with a double-guide rail on the machine body 2, the Z-direction guide rail 8 being fixedly connected to the machine body 2, a Z-direction grating ruler 6 being mounted on an upper surface of the machine body 2, a Z-direction limit magnet 41 being mounted in a length direction of the Z-direction grating ruler 6, a Z-direction reading head 42 being mounted on an upper end of the first slider 12, the Z-direction reading head 42 being matched with the Z-direction grating ruler 6 on a side of the machine body 2, realizing a Z-direction distance output.
The X-direction utilizes the principle of a gear rack, combines a grating ruler to realize the X-direction movement and the distance output, utilizes a ball screw to combine a linear guide rail and the grating ruler to realize the Y-direction movement and the Z-direction movement and the distance output in the Y-direction and the Z-direction, realizes the space coordinate acquisition, fixes the mounting frame 9 on the lathe bed 2 and is aligned with the tested guide rail 4 in parallel, fixes the standard block 46 on the mounting frame 9, and eliminates the device measurement error by the measurement standard block 46 before measurement, checks the device measurement accuracy and ensures the accuracy of measured data when the guide rail is measured.
Specifically, referring to fig. 5, the tool device includes an electromagnetic chuck 3, the lower surface of the electromagnetic chuck 3 is connected with the convex surface of the lathe bed 2, the upper surface of the electromagnetic chuck 3 generates magnetic attraction with the detected guide rail 4, two driving components 7 are installed at two ends of the detected guide rail 4, positioning blocks 47 in the driving components 7 are connected with positioning blocks 49, the positioning blocks 49 are symmetrically distributed along the length direction of the detected guide rail 4, the symmetrical positioning blocks 49 laterally position the detected guide rail 4, the detected guide rail 4 is connected with the positioning blocks 49 by using a stop block 50, and the positioning error of the positioning blocks 49 is adjusted.
Principle and process of operation
Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6 and fig. 7, during measurement, a measurement coordinate system O-X-Y-Z is set first, the X direction is the width direction of the guide rail, the Y direction is the height direction of the guide rail, the Z direction is the length direction of the guide rail, the origin is the midpoint of the intersection line of the bottom surface of the guide rail and the cross section, the measured guide rail 4 is fixed on the tooling device first, the positioning of the measured guide rail 4 is completed, meanwhile, before measurement, the measurement system performs measurement calibration in the X direction, the measurement standard block 46 eliminates the measurement error of the device, the measurement precision of the device is calibrated, the accuracy of the measured data is ensured when the guide rail is measured, the sum of the measurement distance values of the two measurement devices and the width value of the gauge block is completed, the first measurement device 10 and the second measurement device 101 is started up, the first driving piece 14 is started, the measurement system moves in the Z direction, stays to a certain cross section of the measured guide rail 4, the measurement system moves downwards in the Y direction, the scanning measurement is performed, the measurement system moves in the Z direction, the left and the profile parameters of the straight line guide rail are obtained, the measurement parameters of the cross section is repeated in the Z direction, and the measurement steps of the cross section is repeated in the Z direction is completed. During Z dwell, the laser displacement sensor thereon is moved in the Y direction, scanning the track race profile, and recording the profile X coordinates. Its profile Y coordinates are recorded by Y-direction grating ruler 37. The track profile coordinate values of all sections of the guide rail can be obtained, and finally, the center point coordinate of the track is obtained after the track profile coordinate values of all sections of the guide rail are calculated by utilizing least square fitting to 4 quarter arcs, so that the center distance parameter condition of the arc grooves of all sections of the guide rail can be calculated.
The present embodiment is merely illustrative of the application and is not intended to limit the application, and those skilled in the art, after having read the present specification, may make modifications to the embodiment without creative contribution as required, but are protected by patent laws within the protection scope of the present application.
Claims (3)
1. The utility model provides a linear guide circular arc groove centre-to-centre spacing measuring device which characterized in that includes:
a bed (2);
the tool device is arranged on the lathe bed (2) and is used for fixing the tested guide rail (4);
the first measuring device (10) is movably connected with the lathe bed (2);
the second measuring device (101) is connected with the first measuring device (10) in a sliding manner, and the sliding direction is along the width direction of the guide rail (4) to be measured; is arranged opposite to the first measuring device (10);
the X-direction driving device is in driving connection with the first measuring device (10) and in driving connection with the second measuring device (101) and is used for driving the first measuring device (10) to slide relative to the second measuring device (101), so that the distance between the first measuring device (10) and the second measuring device (101) is adjusted according to the width of the measured guide rail (4);
the X-direction driving device includes:
the cylindrical gear (22) is rotationally connected with the second sliding block (31), and the rotating shaft of the cylindrical gear is arranged along the height direction of the tested guide rail (4); the third driving piece (21) is in driving connection with the cylindrical gear (22) and is used for driving the cylindrical gear (22) to rotate;
the first rack (23) is in sliding connection with the second sliding block (31), the sliding direction is arranged along the width direction of the tested guide rail (4), and the first rack is fixedly connected with the first measuring device (10);
the second rack (231) is in sliding connection with the second sliding block (31), the sliding direction is arranged along the width direction of the tested guide rail (4), and the second rack is fixedly connected with the second measuring device (101);
the first rack (23) and the second rack (231) are positioned at two sides of the cylindrical gear (22);
an X-direction grating ruler (16) is fixedly connected with the second sliding block (31), and the length direction of the X-direction grating ruler is arranged along the sliding direction of the first measuring device (10);
an X-direction reading head (11) is fixedly connected with the first measuring device (10) and is matched with the X-direction grating ruler (16);
the third driving piece (21) is fixed on an X-direction motor frame (20), two ends of the X-direction motor frame (20) are connected with a measuring frame (17), the third driving piece (21) is connected with a transmission shaft (18) through a flexible coupling (19), the transmission shaft (18) is in key transmission with a cylindrical gear (22), the cylindrical gear (22) is meshed with a double rack, the double rack is respectively connected with two connecting blocks (24), the connecting blocks (24) are connected with an X-direction sliding block (25), the X-direction sliding block (25) is connected with an X-direction guide rail (26), the X-direction guide rail (26) is arranged on a base plate (27), and two ends of the base plate (27) are connected with the measuring frame (17);
the driving assembly is in driving connection with the first measuring device (10) and is used for driving the first measuring device (10) to move along the height direction of the guide rail (4) to be measured, so that the first measuring device (10) and the second measuring device (101) move to different coordinates on two sides of the guide rail (4) to be measured;
the Z-direction driving device is in driving connection with the first measuring device (10) and is used for driving the first measuring device (10) to move along the length direction of the guide rail (4) to be measured, so that the first measuring device (10) moves to different positions on the length of the guide rail (4) to be measured;
the Z-direction driving device comprises:
the Z-direction screw rod (5) is rotationally connected with the lathe bed (2), and the length direction of the Z-direction screw rod is arranged along the length direction of the tested guide rail (4);
the first sliding block (12) is in threaded connection with the Z-direction screw rod (5), is in sliding connection with the lathe bed (2), and the first measuring device (10) and the second measuring device (101) are arranged on the first sliding block (12); the first driving piece (14) is in driving connection with the Z-direction screw rod (5) and is used for driving the Z-direction screw rod (5) to rotate;
the Z-direction grating ruler (6) is fixedly connected with the lathe bed (2), and the length direction of the Z-direction grating ruler is arranged along the sliding direction of the first sliding block (12);
a Z-direction reading head (42) fixedly connected with the first sliding block (12) and matched with the Z-direction grating ruler (6);
the drive assembly includes:
the Y-direction screw rod (32) is rotationally connected with the first sliding block (12), and the length direction of the Y-direction screw rod is arranged along the height direction of the tested guide rail (4);
the second sliding block (31) is in threaded connection with the Y-direction screw rod (32), is in sliding connection with the first sliding block (12), and the first measuring device (10) and the second measuring device (101) are arranged on the second sliding block (31); the supporting seat (30) is fixed with the second sliding block (31) and is connected with the Y-direction screw rod (32); the second driving piece (13) is in driving connection with the Y-direction screw rod (32) and is used for driving the Y-direction screw rod (32) to rotate;
the Y-direction screw rod (32) is matched with a Y-direction nut seat (39), the Y-direction nut seat (39) is fixed with the second sliding block (31), the second sliding block (31) is connected with symmetrically arranged Y-direction sliding blocks (38), two Y-direction sliding blocks (38) are connected with two Y-direction guide rails (40), and the two Y-direction guide rails (40) are fixed on the second sliding block (31) and are symmetrically distributed;
the Y-direction grating ruler (37) is fixedly connected with the first sliding block (12), the length direction is arranged along the sliding direction of the second sliding block (31), and two Y-direction limit magnets (33) are arranged on one side of the Y-direction grating ruler (37) up and down;
a Y-direction reading head (34) fixedly connected with the second sliding block (31) and matched with the Y-direction grating ruler (37);
the tool device comprises:
the electromagnetic chuck (3) is fixedly connected to the lathe bed (2), is in contact fit with the bottom surface of the tested guide rail (4) and is used for adsorbing the tested guide rail (4);
a stop block (50) which is connected with the lathe bed (2) in a sliding way and is in abutting fit with one side of the tested guide rail (4) in the width direction;
the positioning block (49) is in sliding connection with the lathe bed (2) and is in abutting fit with the other side of the tested guide rail (4) in the width direction;
the driving assembly (7) is in driving connection with the stop block (50), is in driving connection with the positioning block (49), and is used for driving the stop block (50) to be close to the positioning block (49) so as to clamp the tested guide rail (4) and finish positioning of the tested guide rail (4); the positioning slide blocks (47) in the driving assembly (7) are connected with the positioning blocks (49), and the positioning blocks (49) are symmetrically distributed along the length direction of the tested guide rail (4).
2. The linear guide rail circular arc groove center distance measuring device according to claim 1, wherein the first measuring device (10) is a laser displacement sensor, and the second measuring device (101) is a laser displacement sensor.
3. The linear guide rail circular arc groove center distance measuring device according to claim 1, further comprising:
and the standard block (46) is fixedly connected with the lathe bed (2) and is used for checking the measurement precision.
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| CN202310047713.2A CN115979135B (en) | 2023-01-31 | 2023-01-31 | Linear guide rail circular arc groove center distance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310047713.2A CN115979135B (en) | 2023-01-31 | 2023-01-31 | Linear guide rail circular arc groove center distance measuring device |
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| CN115979135B true CN115979135B (en) | 2023-11-03 |
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