Part positioning tool

Abstract

The invention provides a part positioning tool. The part positioning tool comprises a first base, an axial limiting support, a second base and a third base, the axial limiting support, the second base and the third base are sequentially installed on the first base, and a positioning support is arranged on the second base. The third base is provided with a first supporting module used for supporting a part and preventing the part from vibrating during machining, a second supporting module used for conducting self-adaptive supporting on a complex profile on the part, an equal-height alignment block used for aligning the head, provided with a shaft hole, of the part, and a pressing block used for fastening the part. The expansion shaft alignment block is arranged on the equal-height alignment block and used for converting an inner hole datum of a part shaft hole into an outer diameter datum, and the jacking tailstock is used for axially jacking and limiting a part. The axial degree of freedom of a part is jointly limited through the axial limiting support and the jacking tailstock, other degrees of freedom of the part are jointly limited through the positioning support, the supporting module and the pressing block, and the clamping device can be applied to effective clamping and positioning of cylindrical parts with complex structures.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of machining, in particular to a part positioning tool. BACKGROUND

[0002] The landing gear type part is a complex cylindrical part, and its contour is generally finished on a numerical control five-axis automatic production line. With the increase of the landing gear type, the structure of the protruding part of the contour is more complex and the precision requirement is higher, and the existing tooling cannot meet the positioning of such parts. SUMMARY

[0003] The purpose of the present application is to provide a part positioning tool that can be applied to high-precision machining of complex contours of complex cylindrical parts.

[0004] The technical scheme of the present application is: a part positioning tool, comprising a first base, an axial limiting support mounted on the first base in sequence, a second base and a third base, a positioning support is provided on the second base, a first supporting module for supporting the part to prevent vibration during machining, a second supporting module for self-adapting supporting the complex profile of the part, an isometric alignment block for aligning the head of the part provided with a shaft hole, a pressing block for fastening the part, a shaft alignment block provided on the isometric alignment block for converting the inner hole reference of the shaft hole of the part into an outer diameter reference, and a jacking tailstock for axially jacking and limiting the part.

[0005] Preferably, the pressing block comprises a first pressing module for fastening the head of the part provided with a shaft hole, and a second pressing module for pressing the axial center line of the part.

[0006] Preferably, the first pressing module is provided with two on the two heads of the part in rotational symmetry, and each first pressing module is provided with a limiting module on the opposite side.

[0007] Preferably, the positioning support is provided with two on the second base, and one of the positioning supports is provided with a measuring block, and the measuring block is provided with an inner hole, and the inner hole and the hole end face are used for online detection by a machine tool probe to determine the fixed position of the part on the workbench.

[0008] Preferably, the positioning support comprises a first base and a clamping ring hinged to both ends of the first base, and the hinged clamping rings can be attached or separated from each other, and the attached clamping rings are fixed by fasteners.

[0009] Preferably, the second supporting module comprises a second base and a support column vertically mounted in the second base, the support column is floating in the second base and the position of the support column is limited by a limiting assembly, and the upper end of the support column extends to the outside of the second base.

[0010] Preferably, a first limiting slope is provided on one side of the support column, and the limiting component includes a locking column that is horizontally installed in the second base and a locking screw for limiting the axial position of the locking column. The locking screw is threadedly connected to the second base, and the end of the locking column away from the locking screw is adapted to the first limiting slope of the second limiting slope.

[0011] Preferably, a vertically extending limiting groove is provided on one side of the support column, and a limiting screw for limiting the rotation of the support column is threaded onto the second base, the end of the limiting screw being adapted to the limiting groove.

[0012] Preferably, the lower end of the support column is provided with a spring that can provide buoyancy.

[0013] Preferably, the first base is further provided with a positioning ball locking shaft for pressing the positioning fixture onto the machine tool worktable.

[0014] Compared with related technologies, the beneficial effects of the present invention are as follows: I. This invention restricts the axial degree of freedom of a part by using an axial limiting support and a clamping tailstock together, and restricts the remaining degree of freedom of the part by using a positioning support, a support module, and a clamping block together. It can be applied to the effective clamping and positioning of cylindrical parts with complex structures. Second, this invention uses measuring blocks for online alignment before part processing. The equal-height alignment blocks can quickly level the two wings of the part, and the expansion shaft alignment blocks can convert the inner hole reference of the part into the outer circle reference, making it easier to align the part and improve the processing accuracy. Third, the present invention is equipped with a positioning ball locking shaft, which can quickly install the positioning fixture on the machine tool worktable. Attached Figure Description

[0015] Figure 1 A front view schematic diagram of the part positioning fixture provided by the present invention; Figure 2 for Figure 1 Top view; Figure 3 This is a schematic diagram of the measuring block. Figure 4 A schematic diagram of the structure for installing the positioning support on the second base; Figure 5 This is a structural schematic diagram of the second support module; Figure 6 This is a schematic diagram of a structure used in conjunction with an equal-height alignment block and an expansion-axis alignment block.

[0016] In the attached diagram: 1. Axial limiting support; 2. Measuring block; 3. Positioning support; 31. First base; 32. Clamping ring; 33. Fastener; 4. First support module; 5. Second support module; 15. Floating head; 16. Support column; 17. Directional screw; 18. Spring; 19. Locking column; 20. Locking screw; 51. Second base; 52. Limiting assembly; 6. Equal height alignment block; 7. First clamping module; 8. Second clamping module; 9. Tightening tailstock; 10. Limiting module; 11. Shaft expansion alignment block; 12. Positioning ball locking shaft; 13. Clamping screw; 14. Bushing; 21. First base; 22. Second base; 23. Third base; 24. Clamping block; 100. Part. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0018] like Figure 1 , Figure 2 As shown, the part positioning fixture provided in this embodiment includes a first base 21, which has a length direction X and a width direction Y. An axial limiting support 1, a second base 22, and a third base 23 are sequentially arranged along the X direction on the first base 21. The axial limiting support 1 is used to abut against one axial end of the part 100 to achieve axial limiting of the part 100.

[0019] The second base 22 is provided with a positioning support 3. For example... Figure 1 , Figure 4 As shown, two positioning supports 3 are spaced apart on the second base 22. Each positioning support 3 includes a first base 31 and retaining rings 32 hinged to both ends of the first base 31. The hinged retaining rings 32 can be engaged or disengaged, and engaged retaining rings 32 are fixed by fasteners 33. The retaining rings 32 can tightly grip the shaft portion of the part 100 in a circumferential manner.

[0020] like Figure 1 , Figure 3 As shown, a measuring block 2 is installed on one of the positioning supports 3. The measuring block 2 has an inner hole, and the inner hole and the end face of the hole are used for online detection by the machine tool probe to determine the fixed position of the positioning fixture and the part on the worktable.

[0021] like Figure 1 , Figure 2As shown, the third base 23 is provided with a first support module 4 for supporting the part and preventing vibration during part processing, a second support module 5 for adaptive support of complex surfaces on the part, a leveling block 6 for aligning the head of the shaft hole on the part, a clamping block 24 for fastening the part, and a shaft expansion alignment block 11 (e.g., on the leveling block 6) for converting the inner diameter reference of the shaft hole of the part into the outer diameter reference. Figure 6 (as shown), and a clamping tailstock 9 used for axial clamping and limiting of the part.

[0022] The clamping block 24 includes a first clamping module 7 for fastening the head of the part with a axial hole and a second clamping module 8 for clamping the part along its axial centerline. Two first clamping modules 7 are rotationally symmetrically arranged at the two heads of the part, i.e., two are arranged in the Y direction. A limiting module 10 is provided on the opposite side of each first clamping module 7.

[0023] Multiple first support modules 4 and second support modules 5 are provided at corresponding positions on part 100. The second support module 5 includes a second base 51 and a vertically mounted support column 16 within the second base 51. The support column 16 floats on the second base 51, and its position is limited by a limiting component 52. The upper end of the support column 16 extends outside the second base 51 and is connected to a floating head 15. The lower end of the support column 16 is provided with a spring 18 that provides buoyancy.

[0024] The support column 16 has a first limiting slope on one side. The limiting component 52 includes a locking column 19 that is horizontally installed in the second base 51 and a locking screw 20 for limiting the axial position of the locking column 19. The locking screw 20 is threadedly connected to the second base 51. The end of the locking column 19 away from the locking screw 20 is adapted to the first limiting slope and the second limiting slope.

[0025] The support column 16 has a vertically extending limiting groove on one side, and the second base 51 is threaded with a limiting screw 17 for limiting the rotation of the support column 16, the end of the limiting screw 17 being adapted to the limiting groove.

[0026] like Figure 2 As shown, the first base 21 is also provided with a positioning ball locking shaft 12 for pressing the positioning fixture onto the machine tool worktable. The first base 21 has a hole, and a bushing 14 is installed inside the hole, with one of the positioning ball locking shafts 12 mounted on the bushing 14. The positioning fixture is fixed to the machine tool worktable by a clamping screw 13.

[0027] In use, place the positioning fixture on the machine tool worktable and position it using the positioning ball locking shaft 12, then fix it using the clamping screw 13. Loosen the fastener 33, open the retaining ring 32, and remove the pressure plate on the clamping block 24. Place the part 100 on the fixture: the left end of the part 100 is in close contact with the axial limiting support 1, and the right end of the part 100 is placed on the first support module 4 and the second support module 5. Close the retaining ring 32 to pre-tighten the part, and close the pressure block on the clamping block 24 to pre-tighten it against the upper surface of the part 100. Place the shaft alignment block 11 in the shaft hole at end B of the part head, and place the leveling block 6 at end A of the part head. Use the leveling block 6 to level the part from end A to end B (e.g., Figure 2 , Figure 6 (As shown). Finally, fully lock the retaining ring 32 and the clamping block to complete the assembly of the part on the tooling. Before the part is machined, use the online detection probe of the production line machine tool to detect the inner hole and end face of the measuring block 2 to confirm the accuracy of the part's machining position.

[0028] This invention can be applied to automated production lines, enabling multi-step processing at the same workstation. The positioning fixture can quickly and accurately position and secure itself to the machine tool table. Leveling of the part can be quickly achieved using contour blocks. Measuring blocks are installed for automated online inspection before part processing, quickly determining the part's position and ensuring the accuracy of the processed areas.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A part positioning fixture, comprising a first base (21), characterized in that, It also includes an axial limiting support (1), a second base (22) and a third base (23) installed sequentially on the first base (21). The second base (22) is provided with a positioning support (3). The third base (23) is provided with a first support module (4) for supporting the part and preventing vibration during the part processing, a second support module (5) for adaptive support of complex surfaces on the part, a leveling block (6) for aligning the head of the shaft hole of the part, a clamping block (24) for fastening the part, a shaft expansion alignment block (11) provided on the leveling block (6) for converting the inner hole reference of the shaft hole of the part into the outer diameter reference, and a clamping tail seat (9) for axially tightening and limiting the part.

2. The part positioning fixture according to claim 1, characterized in that, The clamping block (24) includes a first clamping module (7) for fastening the head of the part with the shaft hole and a second clamping module (8) for clamping the part along the axial center line.

3. The part positioning fixture according to claim 2, characterized in that, The first clamping module (7) is arranged in two rotationally symmetrical positions on the two heads of the part, and a limiting module (10) is arranged on the opposite side of each first clamping module (7).

4. The part positioning fixture according to claim 1, characterized in that, Two positioning supports (3) are spaced apart on the second base (22). One of the positioning supports (3) is equipped with a measuring block (2). The measuring block (2) has an inner hole. The inner hole and the end face of the hole are used for online detection by the machine tool probe to determine the fixed position of the part on the worktable.

5. The part positioning fixture according to claim 1, characterized in that, The positioning support (3) includes a first base (31) and a retaining ring (32) hinged to both ends of the first base (31). The hinged retaining rings (32) can fit together or separate from each other, and the fitted retaining rings (32) are fixed by fasteners (33).

6. The part positioning fixture according to claim 1, characterized in that, The second support module (5) includes a second base (51) and a column (16) vertically installed in the second base (51). The column (16) floats in the second base (51) and the position of the column (16) is defined by a limiting component (52). The upper end of the column (16) extends to the outside of the second base (51).

7. The part positioning fixture according to claim 6, characterized in that, The support column (16) has a first limiting slope on one side. The limiting component (52) includes a locking column (19) installed laterally in the second base (51) and a locking screw (20) for limiting the axial position of the locking column (19). The locking screw (20) is threadedly connected to the second base (51). The end of the locking column (19) away from the locking screw (20) is adapted to the first limiting slope.

8. The part positioning fixture according to claim 6, characterized in that, The support column (16) has a vertically extending limiting groove on one side, and the second base (51) is threaded with a limiting screw (17) for limiting the rotation of the support column (16), the end of the limiting screw (17) being adapted to the limiting groove.

9. The part positioning fixture according to claim 6, characterized in that, The lower end of the support (16) is provided with a spring (18) that can provide buoyancy.

10. The part positioning fixture according to claim 1, characterized in that, The first base (21) is also provided with a positioning ball lock shaft (12) for pressing the positioning fixture onto the machine tool worktable.

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