CN114012194B - Electro-hydraulic servo valve sleeve precision finishing anchor clamps - Google Patents
Electro-hydraulic servo valve sleeve precision finishing anchor clamps Download PDFInfo
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- CN114012194B CN114012194B CN202111452293.3A CN202111452293A CN114012194B CN 114012194 B CN114012194 B CN 114012194B CN 202111452293 A CN202111452293 A CN 202111452293A CN 114012194 B CN114012194 B CN 114012194B
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- 238000003754 machining Methods 0.000 claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 241000755266 Kathetostoma giganteum Species 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
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Abstract
The invention provides a precision machining clamp for an electro-hydraulic servo valve sleeve, which comprises a base, a limiting piece, a dividing head, a jacking piece and a pressing device, wherein the base is provided with a first end and a second end; the base is provided with a V-shaped support for placing a valve sleeve to be processed; the limiting piece is arranged at one end of the base and is abutted against one shaft end of the valve sleeve during working; one end of the dividing head is a fixed connection end, the other end of the dividing head is an abutting end, the fixed connection end is used for being fixed to one end of the valve sleeve to be machined during working, and the end face of the abutting end is provided with a plurality of grooves matched with the jacking piece; the jacking piece is arranged at the other end of the base and is matched and abutted with the groove in working; the compressing device is used for compressing the valve sleeve to be processed from the upper part. The clamp can effectively control the coplane precision and the verticality of the square hole throttling working edge. The precise machining of the throttling working edge of the square hole of the valve sleeve is realized by synchronously positioning the end face, the inner hole and the outer circle of the valve sleeve after the finish machining, and the free indexing can be realized according to the design requirements of parts.
Description
Technical Field
The invention relates to the field of electro-hydraulic servo valve component machining, in particular to a precision machining clamp for a throttling working edge of a square hole of a valve sleeve of an electro-hydraulic servo valve.
Background
The electro-hydraulic servo valve has very high requirement on the consistency of the valve core and valve sleeve secondary throttling window during opening and closing so as to ensure the control precision of the servo valve. Therefore, the throttling working edge of the square hole of the valve sleeve needs to have higher requirements on verticality (the throttling working edge is vertical to the axis of the valve sleeve) and coplanarity (the throttling working edges on the same side of each square hole in the same circumference are coplanar), and the design requirement generally reaches 0.001mm.
At present, the throttling edge processing mode of the square hole commonly adopted in the industry is to use a numerical control machine to drill a pre-hole before quenching, use a manufacturing process of a slow-moving wire cutting machine or an electric spark machine to process the pre-hole after the outer circle, the inner hole and the end face of the valve sleeve are subjected to finish processing, and then repeatedly correct the pre-hole by using a manual grinding processing method, so that the pre-hole finally reaches the design requirement, therefore, the processing quality of the square hole of the valve sleeve is greatly restricted by human factors, the processing precision is unstable, the production efficiency is low, and the product scrap amount is large.
Disclosure of Invention
In order to solve the problems, the invention provides a precise machining clamp for a valve sleeve of an electro-hydraulic servo valve, which can effectively control the coplanarity precision and the verticality of a square hole throttling working edge. The precise machining of the throttling working edge of the square hole of the valve sleeve is realized by synchronously positioning the end face, the inner hole and the outer circle of the valve sleeve after the finish machining, and the free indexing can be realized according to the design requirements of parts.
The invention is realized by the following technical scheme.
A precise machining clamp for a valve sleeve of an electro-hydraulic servo valve comprises a base, a limiting piece, a dividing head, a jacking piece and a pressing device; the base is provided with a V-shaped support for placing a valve sleeve to be processed; the limiting piece is arranged at one end of the base and is abutted against one shaft end of the valve sleeve to be machined during working; one end of the dividing head is a fixed connection end, the other end of the dividing head is an abutting end, the fixed connection end is used for being fixed to one end of the valve sleeve to be machined during working, a plurality of grooves matched with the abutting piece are formed in the end face of the abutting end, and the included angle between the grooves is a preset angle; the jacking piece is arranged at the other end of the base and is matched and abutted with the groove in the dividing head during working; the compressing device is used for compressing the valve sleeve to be processed, which is placed on the base, from the upper part.
On the basis of the technical scheme, the invention can be further improved or embodied as follows.
Furthermore, the base and the V-shaped support are of an integral structure, and a chip removal hole which is communicated up and down is formed below the valve sleeve to be processed on the base.
Further, the limiting piece comprises a head frame, a limiting rod and a first ball; the headstock is fixed on the base, a first threaded hole which is communicated with the headstock is formed in the headstock along the extending direction of the V-shaped seat, an external thread which is matched with the first threaded hole is formed in the limiting rod, and the limiting rod is in threaded connection through the first threaded hole; the first ball is arranged at one end, facing the center of the base, of the limiting rod; the tail end of the limiting rod is provided with a locking nut; when the valve sleeve machining device works, the limiting rod is abutted to the end part of the valve sleeve to be machined through the first ball.
Furthermore, the dividing head comprises a joint body, a flat head set screw and a second ball; the joint body is of a revolving body structure, one end in the axial direction of the joint body is the fixed connection end, and the other end of the joint body is the abutting end; the end part of the fixed connection end is provided with a plurality of notches; the abutting end is of a hollow structure and is provided with an internal thread, and the hollow structure is communicated with the notch; the second ball is arranged in the hollow structure and is propped against the inner side of the fixed connection end through the flat head fastening screw matched with the internal thread; the surface of the fixed connection end connected with the second ball is of a concave structure.
Further, the concave structure is a conical surface structure of 45-120 degrees.
Furthermore, the grooves are of V-shaped structures and are evenly distributed along the circumferential direction of the end face of the abutting end.
Furthermore, the number of the grooves is 2, and the adjacent included angle is 180 degrees; or 3, and the adjacent included angles are 120 degrees; or 4, and the adjacent included angles are 90 degrees; or 6 in number with adjacent included angles of 60.
Further, the tightening piece comprises a tail frame and a tightening rod; the tail frame is fixedly connected to the base;
the jacking rod is of a rod piece structure and is movably connected to the tail frame, and the axial direction of the rod body of the jacking rod is parallel to the extending direction of the V-shaped support; one end of the tightening rod, which faces the center of the base, is provided with a conical tip matched with the groove.
Further, the top tightening piece further comprises a first spring, and the first spring is arranged between the tail frame and the top tightening rod.
Further, the pressing device comprises a first upright post, a second upright post, a stud and a pressing plate; the first upright post and the second upright post are arranged on two sides of the V-shaped support in a spanning manner, and are both arranged on the base, and at least one of the first upright post and the second upright post is adjustable in installation height; one end of the first upright post is connected with the base, and the other end of the first upright post is hinged with one end of the pressing plate; one end of the second upright post is connected with the base, and the other end of the second upright post is hinged with one end of the stud; the other end of the pressure plate is provided with a through hole or a clamping groove, the pressure plate can be sleeved at the end part of the stud in work and is screwed on the stud through a nut, and the pressure plate is pressed on the valve sleeve to be processed.
Compared with the prior art, the electro-hydraulic servo valve sleeve precision machining clamp provided by the invention mainly has the following beneficial technical effects:
1. the V-shaped support is arranged, the V-shaped support can be used with different products on the outer circle, frequent disassembly of the fixing device is avoided, the workload is reduced, the base is of a hollow design, the processing machine tool is not limited, and chips generated by processing can be discharged through the hollow design.
2. The limiting piece of the threaded connection structure is arranged, so that the axial limiting position can be freely adjusted, and the threaded connection structure can be used with parts of different lengths, and is wide in application range.
3. The dividing head provided by the invention can be fixedly connected with the valve sleeve to be processed, the end part of the dividing head is provided with a groove matched with the dividing square hole of the valve sleeve to be processed, and the accurate positioning can be completed by jacking the jacking piece into the corresponding groove.
4. The invention can be applied to a slow-moving wire cutting machine tool, an electric spark machine tool and the like, and has wider applicable processing equipment.
Drawings
Fig. 1 is a schematic sectional view of a valve sleeve to be processed;
FIG. 2 isbase:Sub>A sectional view taken along line A-A of FIG. 1;
FIG. 3 is a front view of an embodiment of a precise electro-hydraulic servo valve sleeve installation fixture provided by the present invention;
FIG. 4 is a top view of an embodiment of a precision machining fixture for a valve housing of the electro-hydraulic servo valve shown in FIG. 3;
FIG. 5 is a left side view of an embodiment of a precision machining fixture for a valve housing of the electro-hydraulic servo valve shown in FIG. 3;
FIG. 6 is a schematic cross-sectional view of one embodiment of the index head;
FIG. 7 is a cross-sectional structural view of one embodiment of the fitting body;
FIG. 8 is a right side elevational view of the fitting body illustrated in FIG. 7;
FIG. 9 is a left side elevational view of the fitting body illustrated in FIG. 7;
fig. 10 is a cross-sectional view of the indexing head assembled with the valve housing of fig. 1;
FIG. 11 is a partially assembled view of an embodiment of the electro-hydraulic servo valve housing precision machining fixture shown in FIG. 3.
Wherein the part numbers in the figures are represented as:
100. a valve sleeve to be processed, 101, a square hole, 102, a throttling working edge, 103 and an inner hole;
1. the device comprises a base, 11, a V-shaped support, 12 and a chip removal hole;
2. the limiting part 21, the head frame 22, the limiting rod 23 and the first ball;
3. the indexing head 31, the fixing end 32, the abutting end 33, the groove 34, the joint body 35, the flat head set screw 36, the second ball 341, the notch 342 and the concave structure;
4. the jacking piece 41, the tailstock, 42, the jacking rod 421, the conical tip 43 and the first spring;
5. the clamping device comprises a pressing device 51, a first upright post, a second upright post, a first stud, a second stud, a pressing plate 54, a pressing plate 55, a nut 541 and a clamping groove.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The principles and features of the present invention will be described with reference to the accompanying drawings, which are provided for illustration only and are not true physical projections; in addition, the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.
For clearly explaining the function and application of the precise mounting fixture for the valve sleeve of the electro-hydraulic servo valve provided by the invention, a description of a workpiece clamped by the precise mounting fixture is needed. As shown in fig. 1 and 2, fig. 1 is a schematic sectional view of a valve sleeve 100 to be processed; fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1, in which the components shown are the main objects of the mounting clip provided in the present invention. The machining piece is a rotary body with an inner hole 103, a plurality of square holes 101 which are axially arranged at intervals and are communicated with the inner hole 103 are arranged at the shaft body, the square holes 101 are throttling working holes of the valve sleeve, a plurality of square holes 101 with certain included angles are usually arranged at each square hole 101 in the circumferential direction, and a throttling working edge 102 is one edge of the square hole 101 which is perpendicular to the axial direction and can also be understood as a throttling working surface. In the working process, in order to ensure the control precision of the servo valve, the consistency requirement on the opening and closing of the throttling windows (namely all the square holes 101) of the valve core and the valve sleeve pair is very high, so the throttling working edges 102 of the square holes 101 of the valve sleeve and the rotary axis line have high verticality requirement, and the throttling working edges 102 (throttling common working surfaces) on the same side of all the square holes 101 in the circumferential range also have the requirement on coplanarity. This requires that the required machining accuracy must be ensured during the manufacturing of the parts.
The precise mounting fixture for the electro-hydraulic servo valve sleeve provided by the invention can ensure the processing precision of the square hole 101 to the maximum extent by the functions of precise positioning and the like of the valve sleeve 100 to be processed.
The invention discloses a specific embodiment of a precise mounting fixture for a valve sleeve of an electro-hydraulic servo valve, which is shown in figures 3 to 5 and respectively show a front view, a top view and a left view of the precise mounting fixture for the valve sleeve of the electro-hydraulic servo valve. The fixture comprises a base 1, a limiting piece 2, a dividing head 3, a jacking piece 4 and a pressing device 5; the base 1 is provided with a V-shaped support 11 for placing a valve sleeve 100 to be processed; the V-shaped support 11 may not need a long support, and may be a plurality of V-shaped frames arranged at intervals, or may be two pairs of support frames supported at two points, for supporting the outer circle portion of the valve sleeve 100 to be processed after fine grinding. By utilizing the V-shaped design, the clamp can be suitable for various products with different excircles, frequent disassembly of the fixing device is avoided, the workload can be greatly reduced, and the working efficiency is improved.
The limiting piece 2 is arranged at one end of the base 1 and is abutted against one shaft end of the valve sleeve 100 to be processed during working; one end of the dividing head 3 is a fixed connection end 31, the other end of the dividing head is an abutting end 32, the fixed connection end 31 is used for being fixed to one end of the valve sleeve 100 to be machined during working, the end face of the abutting end 32 is provided with a plurality of grooves 33 which are matched with the abutting piece 4, the number of the grooves 33 can be 2 or more, and the included angle between the grooves 33 is a preset angle; the top tightening piece 4 is arranged at the other end of the base 1 and is matched and abutted with the groove 33 on the dividing head 3 in work; the pressing means 5 is used for pressing the valve sleeve 100 to be processed placed on the base 1 from the upper portion.
Through the V support, can ensure the accuracy of the axial position of waiting to process valve barrel 100, and can prevent the swing of valve barrel in the horizontal plane, and through locating part 2, can treat the one end of processing valve barrel 100 and carry out the axial and prescribe a position, through dividing head 3, can realize the fixed connection to the valve barrel other end, play a switching action, simultaneously, utilize the slot 33 that has the predetermined contained angle on the butt end 32 of dividing head 3, cooperation ejector part 4, can treat that another axle head of processing valve barrel 100 is spacing in the axial direction, simultaneously, because slot 33 has the predetermined contained angle, after having processed the square hole 101 of an angle, only need to rotate the valve barrel, push up ejector part 4 in the slot 33 of another angle, can accomplish division and the spacing two functions of axle head, cooperate closing device 5 again and will treat that processing valve barrel 100 compresses tightly from upper portion, can accomplish the restriction of waiting to process all directions degree of freedom of valve barrel 100, process can. By means of the design, the requirements on the verticality and the coplanarity of the throttling working edge 102 of the square hole 101 can be met.
Preferably, the base 1 and the V-shaped support 11 are of an integral structure and can be integrally formed, so that the original precision of the V-shaped support 11 can be ensured, and the clamping precision of a workpiece can be improved; in addition, the region of the base 1 below the valve sleeve 100 to be machined can be provided with the chip removal hole 12 which penetrates up and down, so that the application of the machine tool is not limited, and chips generated by machining can be discharged through the hollow design.
As for the limiting member 2, as shown in fig. 3, which is a specific embodiment, in this structure, the limiting member 2 includes a head frame 21, a limiting rod 22 and a first ball 23; the headstock 21 is fixed on the base 1, a first threaded hole which is through is formed in the headstock 21 along the extending direction of the V-shaped seat, an external thread which is matched with the first threaded hole is formed in the limiting rod 22, and the limiting rod 22 is in threaded connection through the first threaded hole; the first ball 23 is mounted at one end of the limiting rod 22 facing the center of the base 1; the tail end of the limiting rod 22 is provided with a locking nut; during operation, the limiting rod 22 abuts against the end of the valve sleeve 100 to be processed through the first ball 23.
Since the valve sleeve 100 to be processed has a through hole structure, the stopper rod 22 is pushed against the annular end surface, and is preferably disposed at a lower portion of the center line, that is, at a lower end of the annular end surface.
The tail end of the limiting rod 22 is provided with a locking nut for locking the limiting rod 22 after adjusting the position, so that the displacement caused by thread rotation can be avoided, the axial dimension cannot be changed after locking, absolute fixation of the axial position of the valve sleeve 100 to be processed can be ensured, the axial position cannot be changed no matter how the valve sleeve 100 to be processed rotates on the V-shaped support, and further the coplanarity of the throttling working edges 102 of the square holes 101 in the circumferential direction is ensured.
It should be noted that, the extending direction of the V-shaped support 11 in the present invention means the horizontal direction of the supporting surface, that is, the axial direction of the valve sleeve 100 to be processed after the valve sleeve 100 to be processed is placed on the V-shaped support 11.
As for the index head 3, the present invention provides a specific embodiment, as shown in fig. 6 to 9 and 10, the index head 3 includes a joint body 34, a flat set screw 35 and a second ball 36; the joint body 34 is a revolving body structure, one end in the axial direction thereof is the fixed connection end 31, and the other end is the abutting end 32; the end of the fixed connection end 31 is provided with a plurality of notches 341 which can be in a cross structure; the abutting end 32 is a hollow structure and is provided with an internal thread, and the hollow structure is communicated with the cut 341; the second ball 36 is placed in the hollow structure and is jacked to abut against the inner side of the fixed connection end 31 through the flat head set screw 35 matched with the internal thread; the surface of the fixing end 31 connected with the second ball 36 is concave.
In the above structure, through the cut 341 and the hollow structure of the fixed connection end 31, the index head 3 forms an elastic expandable function at the fixed connection end 31, and by matching with the concave structure 342 on the inner side, the flat-head set screw 35 is used to jack the second ball 36 to the concave structure 342, and then the flat-head set screw 35 is screwed in continuously, so that the second ball 36 can be pushed to slide outwards along the concave surface of the concave structure, and the fixed connection end 31 is further propped open through the cut 341, thereby realizing the fixed connection between the joint body 34 and the valve sleeve 100 to be processed. Such expandable design does not require particularly precise machining to achieve precise mating of the index head 3 with the valve housing bore 103.
Preferably, the concave structure is a conical surface structure with an angle of 45-120 degrees, so that the stress is better.
The grooves 33 at the end of the joint body 34 may be arranged in a V-shaped configuration, preferably with an included angle of 60 °, and the grooves 33 are evenly distributed along the circumferential direction of the end face of the abutting end 32.
The square holes 101 are circumferentially indexed differently for different valve sleeves 100 to be machined, for example, as shown in fig. 1, the square holes 101 are 4 in the circumferential direction and are at 90 ° to each other, i.e., perpendicular to each other. For the slow-moving wire machine tool, the square holes 101 in the same direction can be machined together, and then the other pair of the square holes 101 which are perpendicular to each other are machined after the square holes are turned for 90 degrees, and the turning needs to be carried out once. However, for the electric discharge machine, the four square holes 101 need to be machined one by one, and 90 ° turning needs to be performed 3 times, and this process is also called an indexing process.
Therefore, in order to ensure the angle accuracy of each turning, the grooves 33 preset at the end of the joint body 34 can be utilized, the grooves 33 are arranged in a scattering manner along the center to the circumferential direction, the number of the grooves 33 can be designed according to the dividing angle of the square holes 101 of the valve sleeve 100 to be processed, for example, the number of the grooves 33 is 2, the adjacent included angle is 180 degrees, and the grooves can be used for the square holes 101 with the dividing angle of 180 degrees; or 3 square holes 101 with the adjacent included angles of 120 degrees can be used for dividing the angle of 120 degrees; or 4 square holes 101 with the adjacent included angles of 90 degrees can be used for dividing the angle into 90 degrees or 180 degrees; or 6 in number, with adjacent included angles of 60 deg., can be used for square holes 101 with indexing angles of 60 deg. or 120 deg.. Of course, the included angles may be different from each other to form more angle combinations.
For the top member 4, it is necessary to cooperate with the index head 3, as shown in fig. 3 to 5 and 11, said top member 4 comprises a tail 41 and a top tightening rod 42; the tail frame 41 is fixedly connected to the base 1; the tightening rod 42 is of a rod structure and is movably connected to the tailstock 41, and the axial direction of the rod body of the tightening rod is parallel to the extending direction of the V-shaped support 11; one end of the tightening rod 42 facing the center of the base 1 is provided with a conical tip 421 matched with the groove 33.
The tightening rod 42 and the tailstock 41 may be connected by a screw connection, and the valve sleeve 100 to be processed is positioned by screwing the tightening rod 42, and the screw connection may cause poor coplanarity due to inconsistent screwing lengths. Preferably, a spiral spring is adopted, and specifically, the tightening member 4 further includes a first spring 43, the first spring 43 is disposed between the tail frame 41 and the tightening rod 42, and obviously, in order to enable the first spring 43 to always maintain the elastic action in the valve sleeve direction, a baffle plate may be disposed on the tightening rod 42, and the first spring 43 is disposed on the tightening rod 42 and between the baffle plate and the tail frame 41. Through the spring form, the acting force applied to the valve sleeve 100 to be processed by the elastic force of the first spring 43 on the tightening rod 42 after each indexing is the same, so that the axial position of the valve sleeve after each indexing is ensured to be accurately fixed, and the coplanarity requirement of the throttling edge of the square hole 101 of the valve sleeve is further ensured.
For the tip of the tightening rod 42, the tip needs to be matched with the included angle of the groove 33, for example, the V-shaped included angle of the groove 33 is 60 °, and the tip can be processed to a taper angle of 60 °, so that the precise positioning is facilitated, the coplanarity precision of the throttling edge of the square hole 101 of the valve sleeve is further ensured, and simultaneously, the posture adjustment of the valve sleeve 100 to be processed after indexing is facilitated.
As for the pressing device 5, as shown in fig. 3 to 5, in one specific embodiment, the pressing device 5 includes a first upright 51, a second upright 52, a stud 53 and a pressing plate 54; the first upright column 51 and the second upright column 52 are arranged on two sides of the V-shaped support 11 in a straddling manner, and are both mounted on the base 1, and at least one of the mounting heights is adjustable; one end of the first upright post 51 is connected with the base 1, and the other end is hinged with one end of the pressure plate 54; one end of the second upright column 52 is connected with the base 1, and the other end of the second upright column is hinged with one end of the stud 53; the other end of the pressure plate 54 is provided with a through hole or a clamping groove 541, and when the valve sleeve works, the pressure plate 54 can be sleeved on the end of the stud 53 and screwed on the stud 53 through a nut 55, so that the pressure plate 54 is pressed on the valve sleeve 100 to be processed.
The first column 51 or the second column 52 can be fixed on the base 1 by a screw connection, and one of the columns can be set to be adjustable in height, so that the pressing device 5 can be suitable for valve sleeves of various specifications.
Through the hinging of the second upright column 52 and the stud 53, when the pressure plate 54 presses valve sleeves with different heights, the upper surface of the pressure plate 54 can be always ensured to be axially vertical to the stud 53, so that the nut 55 can be ensured to be screwed to keep horizontal contact with the pressure plate 54, and the whole structure is more stable.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A precise machining clamp for a valve sleeve of an electro-hydraulic servo valve is characterized by comprising a base, a limiting piece, a dividing head, a jacking piece and a pressing device;
the base is provided with a V-shaped support for placing a valve sleeve to be processed;
the limiting piece is arranged at one end of the base and is abutted against one shaft end of the valve sleeve to be machined during working;
one end of the dividing head is a fixed connection end, the other end of the dividing head is an abutting end, the fixed connection end is used for being fixed to one end of the valve sleeve to be machined during working, a plurality of grooves matched with the abutting piece are formed in the end face of the abutting end, and the included angle between the grooves is a preset angle;
the puller is arranged at the other end of the base and is matched and abutted with the groove in the dividing head during working;
the pressing device is used for pressing the valve sleeve to be processed placed on the base from the upper part;
the dividing head comprises a joint body, a flat head set screw and a second ball;
the joint body is of a revolving body structure, one end in the axial direction of the joint body is the fixed connection end, and the other end of the joint body is the abutting end;
the end part of the fixed connection end is provided with a plurality of notches;
the abutting end is of a hollow structure and is provided with an internal thread, and the hollow structure is communicated with the notch;
the second ball is arranged in the hollow structure and is propped against the inner side of the fixed connection end through the flat head fastening screw matched with the internal thread;
the surface of the fixed connection end connected with the second ball is of a concave structure.
2. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in claim 1, wherein the base and the V-shaped support are of an integral structure, and the base is located below the valve sleeve to be machined and is provided with a chip removal hole which is vertically communicated.
3. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in claim 1, wherein the limiting member comprises a headstock, a limiting rod and a first ball;
the headstock is fixed on the base, a first through threaded hole is formed in the headstock along the extending direction of the V-shaped seat, an external thread matched with the first threaded hole is formed in the limiting rod, and the limiting rod is in threaded connection through the first threaded hole;
the first ball is arranged at one end, facing the center of the base, of the limiting rod;
a locking nut is arranged at the tail end of the limiting rod;
when the valve sleeve machining device works, the limiting rod is abutted to the end part of the valve sleeve to be machined through the first ball.
4. The electro-hydraulic servo valve housing precision machining fixture as claimed in claim 1, wherein the concave structure is a conical surface structure of 45 ° to 120 °.
5. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in claim 1, wherein each groove is of a V-shaped structure and is evenly distributed along the circumferential direction of the end face of the abutting end.
6. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in claim 1,
the number of the grooves is 2, and the adjacent included angles are 180 degrees;
or 3, and the adjacent included angles are 120 degrees;
or 4, and the adjacent included angles are 90 degrees;
or 6 in number with adjacent included angles of 60.
7. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in claim 1, wherein the jacking piece comprises a tailstock and a jacking rod;
the tail frame is fixedly connected to the base;
the jacking rod is of a rod piece structure and is movably connected to the tailstock, and the axial direction of a rod body of the jacking rod is parallel to the extending direction of the V-shaped support;
one end of the tightening rod, which faces the center of the base, is provided with a conical tip matched with the groove.
8. The electro-hydraulic servo valve housing precision machining fixture of claim 7, wherein the jacking member further comprises a first spring, and the first spring is arranged between the tailstock and the jacking rod.
9. The electro-hydraulic servo valve sleeve precision machining clamp as claimed in any one of claims 1 to 8, wherein the pressing device comprises a first upright, a second upright, a stud and a pressing plate;
the first upright post and the second upright post are arranged on two sides of the V-shaped support in a spanning manner, and are both arranged on the base, and at least one of the first upright post and the second upright post is adjustable in installation height;
one end of the first upright post is connected with the base, and the other end of the first upright post is hinged with one end of the pressing plate;
one end of the second upright post is connected with the base, and the other end of the second upright post is hinged with one end of the stud;
the other end of the pressure plate is provided with a through hole or a clamping groove, the pressure plate can be sleeved at the end part of the stud in work and is screwed on the stud through a nut, and the pressure plate is pressed on the valve sleeve to be processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111452293.3A CN114012194B (en) | 2021-12-01 | 2021-12-01 | Electro-hydraulic servo valve sleeve precision finishing anchor clamps |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111452293.3A CN114012194B (en) | 2021-12-01 | 2021-12-01 | Electro-hydraulic servo valve sleeve precision finishing anchor clamps |
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| CN114012194A CN114012194A (en) | 2022-02-08 |
| CN114012194B true CN114012194B (en) | 2022-12-06 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009093563A1 (en) * | 2008-01-24 | 2009-07-30 | Kosmek Ltd. | Clamp device |
| CN101450407A (en) * | 2008-12-19 | 2009-06-10 | 上海诺玛液压系统有限公司 | Electro-hydraulic servo valve sleeve throttling square-hole processing tool |
| CN103084874B (en) * | 2012-11-13 | 2015-07-29 | 无锡明珠增压器制造有限公司 | Turbine rotor automobile clamper |
| CN104858469B (en) * | 2014-02-24 | 2017-10-03 | 昆山华辰重机有限公司 | The hole axle heart has the eccentric bushing processing unit (plant) of angle with cylindrical axle center |
| CN106112594A (en) * | 2016-08-02 | 2016-11-16 | 徐州恒佳机械科技有限公司 | A kind of many rounds pipe fitting M type Drilling operation frock |
| CN207757235U (en) * | 2017-11-02 | 2018-08-24 | 四川航天烽火伺服控制技术有限公司 | A kind of accurate tooling for processing valve pocket hole and a kind of valve pocket process equipment |
| CN109968055A (en) * | 2017-12-28 | 2019-07-05 | 贵州枫阳液压有限责任公司 | Multi-functional clamping tooling |
| CN212683334U (en) * | 2020-07-24 | 2021-03-12 | 内蒙古机电职业技术学院 | Punching tool for machining aerospace thin-wall outer circle multi-hole parts through numerical control lathe |
| CN113385835B (en) * | 2021-07-08 | 2023-03-21 | 广东原点智能技术有限公司 | Long tube-shape work piece graduation system of processing |
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