KR102016079B1 - Method for measuring bar-like workpieces radius of curvature of laser machining apparatus for machining bar-like workpieces - Google Patents

Abstract

According to the present invention, a distance sensing means composed of an optical sensor, which is a sensing device, is installed on an outer surface of a processing head which is an optimal mounting position, and based on the information measured by the distance sensing means, the radius of curvature of a corner of a rectangular cross-section pipe is adjusted. It can be measured automatically.

Description

METHOD FOR MEASURING BAR-LIKE WORKPIECES RADIUS OF CURVATURE OF LASER MACHINING APPARATUS FOR MACHINING BAR-LIKE WORKPIECES}

The present invention relates to a method for measuring the radius of curvature of a corner portion of a bar-shaped member of a laser processing machine for bar-shaped member processing. It relates to a method of measuring the radius of curvature of a bar member edge of a bar machine member laser machine for automatically measuring the corner radius of curvature of a rectangular cross-section pipe based on information measured by the distance sensing means.

Generally, a laser processing machine is a device for irradiating and cutting a laser beam oscillated and collected from a laser oscillator toward a material through a nozzle provided in a processing head. Examples include a laser processing machine for flat plate processing and a laser processing machine for bar type member processing.

Of the two types of laser machines described above, the bar-shaped member processed by the latter laser machine is a long object (long workpiece) made of a material that is much longer than the cross section and is substantially inflexible. This bar member may have an open or closed cross section in any direction (eg, "L", "T", "U"), round (including round / oval) and rectangular It may have a square cross section.

In general, a generalized laser processing machine for bar-shaped members will be described with reference to FIGS. 1 and 2 as follows.

A laser oscillator (not shown) is installed on the machine bed 30 having a constant length and the processing head supporter 40 positioned adjacent to the front side 31 of the machine bed 30 and toward the bar-shaped member 20. ) Is provided on the processing head 50 for focusing and irradiating the laser beam transmitted from the beams and the upper surface of the rear side 32 of the machine bed 30 to clamp the one end 20a of the bar-shaped member 20. Rotate the bar-shaped member 20 in the forward (clockwise) / reverse (counter-clockwise) direction or move it in the longitudinal direction (+ X, -X coordinate axis) (or the bidirectional arrow A direction) of the bar-shaped member 20. The bar type conveyed by the first chuck means 60 on the upper surface of the first chuck means 60 and the front side 31 of the machine bed 30 which is a position facing the first chuck means 60. It consists largely of the second chuck means 70 which passes while supporting the other end 20b of the member 20, and the processing head 50 passes through the second chuck means 70 and has a predetermined length. In order to process the bar type members 20 to be output it is directly adjacent to the second chuck means (70).

The processing head 50 is installed so as to move a certain distance linearly in the direction of the "+ Y" coordinate axis and the "-Y" coordinate axis on the drawing, and the linear movement of the predetermined distance in the direction of the "+ Z" coordinate axis and the "-Z" coordinate axis on the drawing. It is installed to Here, the "+ X" coordinate axis and the "-X" coordinate axis directions on the drawings are directions in which the first chuck means 60 moves in the longitudinal direction of the bar-shaped member 20.

In addition, the processing head 50 receives the laser beam focused through the nozzle 51 while maintaining a predetermined distance between the end of the nozzle 51 and the outer surface of the bar type member 20 to be processed. ), The bar-shaped member 20 can be cut, and the processing head 50 has a gap detecting means (not shown) for detecting a gap between the end of the nozzle 51 and the outer surface of the bar-shaped member 20. The gap detecting means is a known technique already applied to a flat plate processing apparatus in addition to the bar-shaped member 20.

Z-axis or -Z-axis direction with respect to the bar-shaped member 20 so that the gap of the nozzle 51 and the bar-shaped member 20 of the processing head 50 may become predetermined value based on the detection result from this gap detection means. Move to control to process materials.

This is due to the characteristic that the focus position of the laser beam varies with distance because the gap between the nozzle and the bar-shaped member must be kept constant in order to maintain a constant focus position.

There are various ways of such a gap detection means, for example, there is a capacitive gap sensor for detecting the capacitance between the nozzle of the processing head and the bar-shaped member.

As such, the configuration of moving the processing head 50 in the direction of the "+ Y" coordinate axis / "-Y" coordinate axis and the "+ Z / -Z" coordinate axis is a commonly known technique in the art, and thus detailed description of the configuration will be omitted. .

The first chuck means (60) is installed on the upper surface of the machine bed (30), and is slidably movable in the longitudinal direction (+ X, -X coordinate axis direction) of the machine bed (30) by a drive source such as a motor. It is proximate to or away from the chuck means 70. The first chuck means 60 includes clamping means 65 including a plurality of jaws 64 for clamping one end of the bar-shaped member 20, and jaws of the clamping means 65. Rotating means (not shown) is provided to rotate 64 to rotate the clamped bar-shaped member in the forward / reverse direction. Since the first chuck means 60 having such a configuration is a technique commonly known in the art of laser processing machines for bar type member processing, detailed description of the configuration will be omitted.

The second chuck means 70 is provided on the upper surface of the front side 31 of the machine bed 30 corresponding to the opposite side where the first chuck means 60 is located, the bar-shaped member passing portion 76 is formed Clamping means (75) comprising a plurality of roller type jaws (74) arranged so as to be arranged, and rotating means (not shown) for rotating the jaws (74) of the clamping means (75) are provided It is.

Here, the rotating means of the first chuck means 60 and the rotating means of the second chuck means 70 each use a separate drive motor, and are controlled and driven in synchronization with each other to rotate the jaws 64 and 74. .

Meanwhile, the bar-shaped member 20 clamped by the clamping means of each of the first chuck means and the second chuck means includes a clamping center and a bar-shaped member 20 formed by jaws constituting the clamping means. The cross-sectional center of the bar is concentric, and the reason for this is that the bar-shaped member is eccentric when processing the bar-shaped member unless the clamping center and the cross-sectional center of the bar-shaped member are kept concentric while the bar-shaped member is clamped. This is because the desired machining accuracy cannot be obtained because the motor is rotated in the closed state. It is commonly known in the art to keep the clamping center and the bar-shaped member cross-section center concentric.

On the other hand, in the laser processing machine for bar-shaped member processing described above, in order to laser-process a bar-shaped member such as a pipe having a square cross-section among the bar-shaped members 20, the operator (operator) obtains dimension information such as a corner radius of curvature of the square-shaped pipe. After manually measuring by using the direct measuring tool (Radius Guage), the measured dimension information should be input to the NC device (control device).

However, the current measurement method described above has a problem that productivity is significantly reduced as the measurement is performed by the operator through manual measurement using a measuring tool.

In addition, in order to process a new bar-shaped member whose cross-sectional shape and size have been changed, the operator needs to re-measure one by one. At this time, there is a problem that a machining defect occurs when an incorrect measurement information is input by an operator.

In order to solve the above problems, it is a trend to develop a bar-type member laser processing machine that can be obtained by automatically measuring the dimensional information of the bar-shaped member using a sensor device rather than manual measurement.

The present invention, by reflecting the development trend and various problems of the bar-type laser processing machine for processing the bar-type member by installing a distance sensing means consisting of an optical sensor as a sensing device on the outer surface of the processing head of the optimal installation position, by the distance sensing means It is an object of the present invention to provide a method for measuring the radius of curvature of a bar-shaped member of a bar-type laser processing machine for automatically measuring a corner curvature radius of a rectangular cross-section pipe based on the measured information.

The present invention for achieving the above object, the machine bed having a certain length; First chuck means installed on an upper surface of the rear side of the machine bed to rotate the bar-shaped member about the clamping center in a forward and reverse direction or to convey it in the longitudinal direction of the bar-shaped member while clamping one end of the bar-shaped member; Second chuck means for passing through the other end of the bar-shaped member conveyed by the first chuck means on an upper surface of the front side of the machine bed which is a position facing the first chuck means; The other end of the bar-shaped member, which is installed in the processing head supporter located adjacent to the front side of the machine bed so as to be able to control movement of a predetermined distance in the transverse direction with respect to the axis of the clamping center, and is conveyed by the first chuck means. A processing head for irradiating a laser beam through a nozzle toward an outer surface of the bar-shaped member to process a; In the method of measuring the radius of curvature of the bar-shaped member corner portion of the laser processing machine for bar-shaped member comprising a gap detecting means for detecting the gap between the nozzle end and the outer surface of the bar-shaped member in the processing head, the bar-shaped member is rectangular A cross-section pipe is provided on the outer surface of the processing head spaced apart from the outer surface of the rectangular cross-section pipe is provided with a distance sensing means consisting of an optical sensor for detecting the separation distance between the processing head and the square cross-section pipe, the processing Sensing a straight section distance of each of the transverse and longitudinal sides of the rectangular cross-section pipe by the distance sensing means while controlling the head to move a predetermined distance in the transverse direction with respect to the axis of the clamping center; Setting reference lengths of the horizontal and vertical sides of the rectangular cross-section pipe and storing them in data storage means; Calculating a corner radius of curvature of the rectangular cross-section pipe based on the reference length stored in the data storage means and the straight section distance of each of the horizontal and vertical sides of the rectangular cross-section pipe, the reference length stored in the data storage means. The method may include: setting a reference distance spaced from the clamping center to an arbitrary position of the processing head and storing the reference distance; Controlling the positional movement of the machining head by the distance sensing means to coincide with the axis of the clamping center; Calculating the distance from the clamping center to the outer surface of the pipe on the basis of the reference distance stored in the data storage means and the separation distance detected by the distance sensing means, and in the calculating step, Computing the length of the horizontal side and the vertical side, and the calculating step is to first calculate the length of any one of the horizontal side and the longitudinal side of the rectangular cross-section pipe, and then the 90 square cross-section pipe by the first chuck means and the second chuck means. After the rotation (°), it characterized in that it further comprises the step of calculating the length of the remaining side.

According to the present invention, a distance sensing means comprising an optical sensor as a sensing device is installed on an outer surface of a processing head which is an optimal mounting position, and the radius of curvature of a corner of a rectangular cross-section pipe is based on information measured by the distance sensing means. Can be measured automatically.

BRIEF DESCRIPTION OF THE DRAWINGS The external appearance perspective view which shows the structure of the laser processing machine for bar-shaped member processing by a prior art.
FIG. 2 is an enlarged perspective view illustrating an enlarged view of the leader line “K” of FIG. 1.
3 is an external perspective view showing the configuration of a laser processing machine for bar type member processing according to the present invention;
4 is an enlarged perspective view illustrating an enlarged view of the leader line "L" shown in FIG.
5 is a view showing an outer diameter measuring method which is an outer size of a circular cross-section pipe in a bar-shaped member in a laser processing machine according to the present invention.
Fig. 6 is a view showing a length measuring method of a longitudinal side of a transverse side, which is an external size of a rectangular cross-section pipe in a bar-shaped member in a laser processing machine according to the present invention.
7 is a view showing a method of measuring the corner radius of curvature of the rectangular cross-section pipe of the bar-shaped member in the laser processing machine according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. For convenience of description, the same member numbers used in the prior art descriptions apply to the same constituent members as the prior art.

The laser processing machine for bar-shaped member processing according to the present invention is provided on a machine bed 30 having a constant length and a processing head supporter 40 positioned adjacent to the front side 31 of the machine bed 30. The processing head 50 which focuses and irradiates the laser beam transmitted from the laser oscillator (not shown) toward the sub-type member 20, and is installed on the upper surface of the rear side 32 of the machine bed 30 A first chuck means 60 for rotating the bar-shaped member in the forward / reverse direction or conveying the bar-shaped member in its longitudinal direction while clamping the one end 20a of the end portion 20a, and the first chuck means 60; Second chuck means 70 for passing through the other end portion 20b of the bar-shaped member conveyed by the first chuck means 60 to the upper surface of the front side 31 of the machine bed 30 in the position facing the It consists of a large), the processing head 50 is a bar protruding a predetermined length through the second chuck means 70 In order to process the member 20 it is provided adjacent to the second chuck means (70).

The processing head 50 is installed so as to linearly move a certain distance in the direction of the "+ Y" coordinate axis and "-Y" coordinate axis on the drawing, and to move a certain distance linearly in the direction of the "+ Z" coordinate axis and the "-Z" coordinate axis on the drawing. Is installed. Here, the "+ X" coordinate axis and the "-X" coordinate axis directions on the drawings are directions in which the first chuck means 60 moves in the longitudinal direction of the bar-shaped member 20.

In addition, the processing head 50 maintains a predetermined distance between the end of the nozzle 51 and the outer surface of the bar-shaped member 20 to be processed by the laser beam through the bar-shaped member 20 through the nozzle 51. By irradiation, the bar-shaped member 20 can be cut, and the processing head 50 is equipped with gap detecting means for detecting a gap between the end of the nozzle 51 and the outer surface of the bar-shaped member 20. This gap detecting means is a known technique already applied to flat plate processing apparatuses in addition to bar-shaped members.

Z-axis or -Z-axis direction with respect to the bar-shaped member 20 so that the gap between the nozzle 51 and the bar-shaped member 20 of the processing head 50 may become a predetermined value based on the detection result from this gap detection means. Move to control to process materials.

This is due to the characteristic that the focus position of the laser beam varies with distance because the gap between the nozzle and the bar-shaped member must be kept constant in order to maintain a constant focus position.

There are various ways of such a gap detection means, for example, there is a capacitive gap sensor for detecting the capacitance between the nozzle of the processing head and the bar-shaped member.

As such, the configuration of moving the processing head 50 in the direction of the "+ Y / -Y" coordinate axis and the "+ Z / -Z" coordinate axis is a technique commonly known in the art, and thus detailed configuration description thereof will be omitted.

The first chuck means (60) is installed on the upper surface of the machine bed (30), and is slidably movable in the longitudinal direction (+ X, -X coordinate axis direction) of the machine bed (30) by a drive source such as a motor. It is proximate to or away from the chuck means 70. The first chuck means 60 includes clamping means 65 including a plurality of jaws 64 for clamping one end of the bar-shaped member 20, and jaws of the clamping means 65. Rotating means (not shown) is provided to rotate 64 to rotate the clamped bar-shaped member in the forward / reverse direction. Since the first chuck means 60 having such a configuration is a commonly known technique in the field of laser processing machines for pipe processing, detailed description of the configuration will be omitted.

The second chuck means 70 is provided on the upper surface of the front side 31 of the machine bed 30 corresponding to the opposite side where the first chuck means 60 is located, the bar-shaped member passing portion 76 is formed Clamping means (75) comprising a plurality of roller type jaws (74) arranged so as to be arranged, and rotating means (not shown) for rotating the jaws (74) of the clamping means (75) are provided It is.

Here, the rotating means of the first chuck means 60 and the rotating means of the second chuck means 70 each use a separate drive motor, and are controlled and driven in synchronization with each other to rotate the jaws 64 and 74. .

On the other hand, the bar-shaped member 20 clamped by the clamping means of each of the first chuck means and the second chuck means, the cross section of the clamping center and the bar-shaped member formed by a jaw constituting the clamping means The center is concentric, which is because the bar-shaped member is rotated eccentrically during pipework unless the clamping center and the cross-section center of the bar-shaped member are kept concentric while the bar-shaped member is clamped. This is because the desired machining precision cannot be obtained. It is commonly known in the art to keep the clamping center and the bar-shaped member cross-section center concentric.

Laser processing machine for bar-shaped member processing according to the present invention is made of the same configuration as the prior art, the difference from the prior art is the processing head (the optimal installation position of the distance sensing means 100 made of an optical sensor as a sensing device ( It is installed on the outer surface of 50, so that it can be used in various ways based on the information detected by the distance detecting means (100).

 It is possible to measure the outer size of a pipe having a circular / square / rectangular cross section among the bar members, and the bar member 20 to be described below will be uniformly described as a term “pipe” and refer to a bar member. Pipes are assigned the same part numbers as those used for the purpose.

The processing head 50 is installed to be able to control the movement of a certain distance in the vertical direction with respect to the longitudinal direction of the pipe 20, a certain distance straight line in the direction of the "+ Y" coordinate axis and "-Y" coordinate axis in the drawing It is installed to move.

And the processing head 50 is controlled by the control means (not shown) to move a predetermined distance position in a "+ Y" coordinate axis and a "-Y" coordinate axis direction. Here, the "+ Y" coordinate axis and the "-Y" coordinate axis direction are in the longitudinal direction of the pipe 20 in parallel with the coordinate axis of any one of the Y and Z coordinate axes of the cross-sectional center of the pipe 20 to be machined having a constant length. In the direction in which the processing head 50 moves in the transverse direction, in the embodiment of the present invention, the processing head 20 moves in parallel with the Y coordinate axis among the Y and Z coordinate axes of the cross-sectional center of the pipe 20.

Distance sensing means 100 is installed in the processing head 50 serves to detect the distance between the processing head 50 and the outer surface of the pipe 20. More specifically, the processing head 50 is installed detachably through a separate connecting means (not shown).

The distance detecting means 100 is an optical sensor which is a non-contact distance sensor, which uses laser light, a detector housing installed outside the processing head 50, a light emitting part for generating laser light toward an outer surface of the pipe; In addition, the light receiving unit receives the reflected laser light after reaching the outer surface of the pipe 20, and the light emitting unit and the light receiving unit are built in the detector housing.

The present invention configured as described above is provided on the outer surface of the processing head spaced apart from the outer surface of the bar-shaped member by a distance detecting means for detecting the distance, based on the distance detected by the distance sensing means There is a method for measuring information on the bar-shaped member consisting of a number of embodiments as follows.

[First Embodiment]

 According to the type of the bar-shaped member, measuring the outer size of the cross section, measuring the corner radius of curvature, and measuring the concentricity between the clamping center and the cross-section center of the bar-shaped member are performed.

Second Embodiment

According to the type of the bar-shaped member is performed to measure the outer size of the cross-section, the corner curvature radius measuring step.

Third Embodiment

And, in another embodiment, the step of measuring the radius of curvature of the edge of the cross-section according to the type of the bar-shaped member, and the step of measuring the concentricity between the clamping center and the cross-section center of the bar-shaped member.

[Example 4]

And, in another embodiment, the shape of the cross section according to the type of the bar-shaped member and the step of measuring the concentricity between the clamping center and the cross-section center of the bar-shaped member is performed.

Hereinafter, each measuring step described in the above-described first, second, third and fourth embodiments will be described in detail.

[Measurement step of external size of cross section according to type of bar member]

The present invention is a machine bed (30) having a constant length; The bar-shaped member is slidably installed on the machine bed 30 so as to be transported in the longitudinal direction of the bar-shaped member 20 while clamping the bar-shaped member 20 to be processed having a predetermined length. Chuck means for rotating (20) about the clamping center in the forward and reverse directions; A processing head 50 installed to be able to control movement of a predetermined distance in a transverse direction with respect to the axis of the clamping center, and to irradiate a laser beam toward an outer surface of the pipe for processing a bar-shaped member conveyed by the chuck means. Disclosed is a method for measuring a bar type member outer size of a laser processing machine for processing a bar type member including a.

The bar member used in the outer size measuring method according to the present invention targets a circular cross-section pipe and a square cross-section pipe (a square cross-section pipe, a rectangular cross-section pipe), and is spaced apart from the clamping center to an arbitrary position of the machining head. Setting the reference distance to be stored in the data storage means; Controlling, by the distance sensing means, the positional movement of the machining head to coincide with the axis of the clamping center; And calculating a distance from the clamping center to the outer surface of the bar-shaped member based on the reference distance stored in the data storage means and the separation distance sensed by the distance sensing means 100.

In the step of storing and storing data by setting a reference distance spaced from the clamping center to an arbitrary position of the processing head, the reference distance RD is the processing head (C) from the clamping center CL, as shown in FIG. 5. 50) to any position. Here, the arbitrary position of the processing head 50 is, for example, preferably set to a point between the light emitting portion and the light receiving portion provided in the interior of the sensor housing constituting the distance sensing means 100, but is not limited thereto. RD1 Of course, the reference distance can also be set by RD2.

In addition, the step of controlling the positional movement of the processing head so that the distance detecting means 100 coincides with the axis AL of the clamping center CL may include the axis of the clamping center CC1 as illustrated in FIG. 5. AL), i.e., the machining head 50 is positioned in the + Z coordinate axis or -Z coordinate axis direction of the Z, Y Cartesian coordinate axis so that the Z coordinate axis of the Z, Y Cartesian coordinate axis and the center axis AL of the distance sensing means 100 coincide. To control the movement. Here, moving in the direction of the + Z coordinate axis or -Z coordinate axis of the Z, Y Cartesian coordinate axis is the same as moving in the transverse direction with respect to the axis of the clamping center.

Next, the step of calculating the distance (D) from the clamping center (CC1) to the outer surface of the bar-shaped member 50, the reference distance (RD) stored in the data storage means and the distance sensed by the distance sensing means 100 It is calculated using Equation 1 below based on the standoff distance (SOD).

D = RD-SOD --------------------------- [Equation 1]

Therefore, when the bar-shaped member is a circular cross-section pipe, the outer diameter of the circular cross-section pipe is calculated in the calculation step, wherein D calculated in [Equation 1] is a value corresponding to a radius, which is a multiple of this value. The outer diameter of the circular cross-section pipe can be known.

In addition, when the bar-shaped member is a rectangular cross-section pipe, as shown in FIG. 6, the length of the horizontal side (H) and the vertical side (P) of the rectangular cross-section pipe 20 is calculated in the calculating step. Preferably, the calculating step is to first calculate the length of one side of the horizontal side (H) and the vertical side (P) of the rectangular cross-section pipe, then rotate the rectangular cross-section pipe 90 ° (degrees) by the chuck means, the rest Computing the length of the side.

In more detail, the measurement is performed in the same manner as the outer diameter measuring method of the circular cross-section pipe 20, but the length of the horizontal and vertical sides of the rectangular cross-section pipe is measured twice by rotating 90 ° (degrees) using the chuck means. It is.

[Measure curvature radius]

The present invention is a machine bed (30) having a constant length; The bar-shaped member is slidably installed on the machine bed 30 so as to be transported in the longitudinal direction of the bar-shaped member 20 while clamping the bar-shaped member 20 to be processed having a predetermined length. Chuck means for rotating 30 in a forward and reverse direction about a clamping center; A processing head 50 installed to be able to control movement of a predetermined distance in a transverse direction with respect to the axis of the clamping center, and to irradiate a laser beam toward an outer surface of the pipe for processing a bar-shaped member conveyed by the chuck means. Disclosed is a method of measuring a radius of curvature of a corner portion of a bar type member of a bar type member laser processing machine including a.

The bar member used in the outer size measuring method according to the present invention targets a rectangular cross-section pipe (a square cross-section pipe, a rectangular cross-section pipe), and the processing head is positioned at a predetermined distance in the transverse direction with respect to the axis of the clamping center. Sensing (measuring) the distance between the straight sections (H) and the vertical sides (H) of the rectangular cross-section pipe by the distance detecting means while controlling the movement;

Setting reference lengths of the horizontal side (H) and the vertical side (P) of the rectangular cross-section pipe and storing them in the data storage means;

Computing the corner curvature radius of the rectangular cross-section pipe based on the reference length stored in the data storage means and the straight section distance of each of the horizontal wall and the vertical wall of the rectangular cross-section pipe.

Each step will be described as follows.

First, in the linear section distance measuring step, as shown in FIG. 6, the machining head 50 is + Y in the -Y coordinate axis of the transverse direction (Z, Y Cartesian coordinate axis) with respect to the axis AL of the clamping center CL1. In this case, the processing head 50 moves in parallel with the horizontal side H of the rectangular cross-section pipe, wherein the distance sensing means 100 constitutes the rectangular cross-section pipe. It is possible to measure the straight section distance SD of the horizontal side H, excluding the corner portion C1.

That is, when the distance detecting means 100 passes the boundary between the horizontal side H and the edges C1 and C2 momentarily, the distance detecting means 100 does not measure the separation distance when passing through the boundary. .

Since there are one edge portion C1 and C2 on each side in the width direction of the horizontal side H of the rectangular cross-section pipe, the distance detecting means 100 separates the distance when passing through the area of the horizontal side H. Is sensed, but the separation distance is not sensed after passing momentarily through the boundary region.

Therefore, since the distance between the first and second points P1 and P2, in which the separation distance is not sensed by the distance detecting means 100, becomes a straight section distance SD of the horizontal side of the rectangular cross-section pipe eventually, The straight line distance SD has a correlation with the machining head position moving distance from the first point P1 to the second point P2, and calculates the actual machining head position moving distance, so as to calculate the straight line distance SD. ) Can be used as information.

Next, the straight section distance SD of the longitudinal side P of the rectangular cross-section pipe should be measured, and the straight section distance SD of the vertical wall P is measured at 90 ° using the chuck. After rotating the rectangular cross-section pipe, it is performed in the same manner as the method for measuring the straight section distance of the horizontal side (H) described above.

 So far, the method of measuring the straight section distance of the rectangular cross-section pipe has been described.

Next, a method of setting the reference lengths of the horizontal and vertical sides of the rectangular cross-section pipe will be described.

The method for setting the reference lengths of the horizontal and vertical sides of the rectangular cross-section pipe is the same as the measurement of the length of the horizontal and vertical sides of the rectangular cross-section pipe in the description of the outline size measurement step of the cross-section according to the type of the bar-shaped member described above. , Description is omitted.

However, the method of setting the reference lengths of the horizontal and vertical sides of the rectangular cross-section pipe may use information previously input by the user in CAD / CAM, in addition to the embodiments described above.

Finally, the corner portion C1 of the rectangular cross-section pipe using Equation 2 below based on the reference length stored in the data storage means and the straight section distance SD of each of the horizontal and vertical sides of the rectangular cross-section pie. Calculate the radius of curvature (R).

R = (H-SD) / 2 ------------------------------ [Equation 2]

[Measurement of concentricity between clamping center and cross-section center of bar-shaped member]

The present invention is a machine bed (30) having a constant length; The bar-shaped member is slidably installed on the machine bed 30 so as to be transported in the longitudinal direction of the bar-shaped member 20 while clamping the bar-shaped member 20 to be processed having a predetermined length. Chuck means for rotating (20) about the clamping center in the forward and reverse directions; A processing head 50 installed to be able to control movement of a predetermined distance in a transverse direction with respect to the axis of the clamping center, and to irradiate a laser beam toward an outer surface of the pipe for processing a bar-shaped member conveyed by the chuck means. Disclosed is a method for measuring concentricity between a bar-shaped member and a cross-section center of a clamping center of a bar-type laser beam processing machine including a.

A separation distance measuring step of measuring the separation distance with the distance detecting means 100 with respect to a specific portion of the outer circumferential surface of the bar-shaped member; After performing the separation distance measuring step, based on whether or not to measure the separation distance comprises a concentricity determination step of determining whether the concentric between the clamping center and the bar-shaped member cross-section center.

The bar-shaped member used in the method for measuring concentricity between the clamping center and the bar-shaped member cross-sectional center according to the present invention is a circular cross-section pipe and a rectangular cross-section pipe.

First, when the bar-shaped member is a circular cross-section pipe, the separation distance measuring step may be performed by processing head 50 such that the distance sensing means 100 coincides with the axis AL of the clamping center CC1 as shown in FIG. 5. After the position movement control of the step), the determination of whether the concentricity is determined that the clamping center (CC1) and the pipe cross-section center (CC2) is concentric when the separation distance is measured, if the separation distance is not measured clamping center (CC1) and pipe cross-section center (CC2) are judged not to be concentric. At this time, the specific portion uses the outer circumferential surface of the circular cross-section pipe.

Here, when the separation distance is not measured, the clamping center CC1 and the pipe cross-section center CC2 are not concentric. If the separation distance is not concentric, the laser light generated by the light emitting part constituting the distance sensing means 100 is After reaching the outer circumferential surface of the circular cross-section pipe, it is reflected and is not received by the light receiving portion.

When the separation distance is measured, the clamping center CC1 and the pipe cross-section center CC2 are concentric, and when the distance is concentric, the laser light generated from the light emitting part constituting the distance sensing means 100 is the circular cross-section pipe. After reaching the outer circumferential surface, the light is reflected by the light receiving unit.

Next, when the bar-shaped member is a rectangular cross-section pipe, as shown in Figure 6, the separation distance measuring step is a predetermined distance in the transverse direction with respect to the axis (AL) of the clamping center (CC1) for the processing head 100. While performing the position movement control on any one of the horizontal side (H) and the vertical side (P) of the rectangular cross-section pipe, the concentric determination step is the horizontal side (H) and vertical side (P) of the rectangular cross-section pipe. After calculating the length of the straight section (SD) of the measured wall on the basis of whether the measured distance of any one side of the measured side is used to calculate the straight section length information. In this case, the specific portion is a boundary between any one of the sides and corners of the horizontal side (H) and the vertical side (P) of the rectangular cross-section pipe, and the determination of whether the concentricity, corresponds to half of the calculated length of the straight section. The method may further include determining whether the center position SD_C of the side and the clamping center position CC1 of the side coincide with each other.

Here, measuring the straight section length (SD) is the same as the method of measuring the corner radius of curvature of the rectangular cross-section pipe described above.

However, when calculating the actual machining head position movement distance from the first point (P1) to the second point (P2) for the measurement of the straight section distance, the center (SD_C) position of the straight section distance is calculated, this straight section distance It is determined whether the position of the center SD_C and the position of the clamping center CC1 coincide with each other. In other words, it is determined whether it is on the shortest distance or on the vertical line (on the Z coordinate axis line).

Here, it is determined whether the center SD_C position and the clamping center CC1 position of the straight line distance coincide with each other. If not, the clamping center CC1 and the bar-shaped member end face center CC2 are not concentric with each other. It is determined that the center SD_C position of the straight section distance coincides with the position of the clamping center CC1, and if it matches, the clamping center CC1 and the bar-shaped member end face center CC2 are concentric with each other.

20 bar-shaped member
30: machine bed
60: first chuck means
70: second chuck means
100: distance detection means
CC1: clamping center
CC2: section center
H: side
P: vertical side
C1: corner
RD: Reference distance
SOD: Distance
D: radius

Claims (4)

A mechanical bed having a constant length; First chuck means installed on an upper surface of the rear side of the machine bed to rotate the bar-shaped member about the clamping center in a forward and reverse direction or to convey it in the longitudinal direction of the bar-shaped member while clamping one end of the bar-shaped member; Second chuck means for passing through the other end of the bar-shaped member conveyed by the first chuck means on an upper surface of the front side of the machine bed which is a position facing the first chuck means; The other end of the bar-shaped member, which is installed in the processing head supporter located adjacent to the front side of the machine bed so as to be able to control movement of a predetermined distance in the transverse direction with respect to the axis of the clamping center, and is conveyed by the first chuck means. A processing head for irradiating a laser beam through a nozzle toward an outer surface of the bar-shaped member to process a; In the method of measuring the radius of curvature of the bar-shaped member corner portion of the laser processing machine for bar-shaped member comprising a gap detecting means for detecting a gap between the nozzle end and the outer surface of the bar-shaped member in the processing head,
The bar-shaped member is a rectangular cross-section pipe,
A distance sensing means comprising an optical sensor installed on an outer surface of the processing head spaced apart from the outer surface of the rectangular cross-section pipe and detecting a separation distance between the processing head and the rectangular cross-section pipe, thereby clamping the processing head. Detecting a distance between the horizontal and vertical sides of the rectangular cross-section pipe by the distance detecting means while controlling the movement of the predetermined distance in the lateral direction with respect to the axis of the cross section;
Setting reference lengths of the horizontal and vertical sides of the rectangular cross-section pipe and storing them in data storage means;
Comprising the step of calculating the corner radius of curvature of the rectangular cross-section pipe based on the reference length stored in the data storage means and the straight section distance of each of the horizontal and vertical sides of the rectangular cross-section pipe,
The reference length stored in the data storage means, the step of setting the reference distance spaced from the clamping center to any position of the processing head and storing in the data storage means; Controlling the positional movement of the machining head by the distance sensing means to coincide with the axis of the clamping center; Calculating the distance from the clamping center to the outer surface of the pipe on the basis of the reference distance stored in the data storage means and the separation distance detected by the distance sensing means,
In the calculating step, the lengths of the horizontal and vertical sides of the rectangular cross-section pipe are calculated, and the calculating step first calculates the length of any one of the horizontal and vertical sides of the rectangular cross-section pipe, and then the first chuck means and the second side. The method for measuring the radius of curvature of the corner portion of a bar-shaped member of a bar-shaped member laser processing machine, further comprising the step of calculating the length of the remaining side after rotating the rectangular cross-section pipe by 90 ° by the chuck means. delete delete delete

Images