Clamp for cutting inner and outer molded surfaces of thin-wall annular workpiece

Abstract

The invention provides a thin-wall annular workpiece inner and outer molded surface cutting machining clamp which comprises a bottom plate, a supporting plate and a pressing block, the lower end face of the supporting plate is fixedly connected with the bottom plate, the upper end face of the supporting plate is arranged to be a first profiling surface, the lower end face of the pressing block is arranged to be a second profiling surface, the upper end face of the pressing block is provided with a pressure guide groove, and the supporting plate is fixedly connected with the pressing block. And the workpiece is clamped between the first profiling surface and the second profiling surface, and the pressure guide groove is in the shape of an inverted cone, a hemisphere or an inverted regular pyramid. By the adoption of the technical scheme, the workpiece is clamped between the first profiling face and the second profiling face, the rigidity of the workpiece is improved, the workpiece is kept at the stable positioning position in the cutting machining process, and a foundation is laid for improving the cutting machining precision; and the clamping force can be uniformly distributed on the surface of the pressing block, so that all parts of the workpiece bear the uniform clamping force, and the workpiece is further kept at a stable position in the cutting machining process.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of clamps, in particular to a thin-walled annular workpiece inner and outer surface cutting machining clamp. BACKGROUND

[0002] With the continuous development of machining process technology, people's requirements for the shape, performance and other aspects of mechanical parts are getting higher and higher, in order to keep the workpiece stable positioning in the cutting process, a special clamp is used to clamp the workpiece.

[0003] For example, the patent document with publication number: "CN112338603A" discloses an auxiliary machining clamp for open thin-walled ring and a machining method thereof, the auxiliary machining clamp includes a base and a cover plate, the base is provided with a flange, the cover plate is provided with a flange, the base and the cover plate are connected together through fasteners, the flanges are opposite to each other, and multiple open thin-walled rings can be clamped between the flanges. The machining method includes using the auxiliary machining clamp as described above and clamping multiple blanks, cutting the blanks into closed rings through a machine tool; then cutting the closed rings from the radial direction to obtain multiple open thin-walled rings; using the patent technical solution, the blanks are clamped and fixed by using a special clamp, the overall rigidity of the blanks is improved, and the machining difficulty is reduced.

[0004] However, in the machining process of a certain type of thin-walled ring, the overall contour size of the part is very large, and the upper and lower end faces of the workpiece are both irregular surfaces, because the part has a large size and a thin wall, the rigidity is poor, the machining stability is poor, and it is difficult to guarantee the size machining precision by using conventional cutting machining methods, and the product scrap rate is high, therefore, it is urgent to develop a new special clamp. SUMMARY

[0005] To solve the above technical problems, the present application provides a thin-walled annular workpiece inner and outer surface cutting machining clamp.

[0006] The present application is realized by the following technical solutions.

[0007] The present application provides a thin-walled annular workpiece inner and outer surface cutting machining clamp, which includes a base plate, a supporting plate and a pressing block, the lower end face of the supporting plate is fixedly connected with the base plate, the upper end face of the supporting plate is provided with a first profiling surface, the lower end face of the pressing block is provided with a second profiling surface, the upper end face of the pressing block is provided with a pressure guide groove, the supporting plate and the pressing block are fixedly connected, and the workpiece is clamped between the first profiling surface and the second profiling surface, and the pressure guide groove is in the shape of an inverted cone, a hemisphere or an inverted right prism.

[0008] At least one pair of column pins is used to fixedly connect the supporting plate and the pressing block, and the pair of column pins are arranged on the left and right sides of the pressure guide groove.

[0009] The second profiling surface is also bonded with a damping rubber pad, and the damping rubber pad is clamped between the workpiece and the second profiling surface.

[0010] The thin-walled annular workpiece inner and outer surface cutting processing clamp further comprises a pressing plate, a supporting rod, a spacer rod and a pressing rod, the surface of the pressing plate is provided with a limiting hole, the surface of the bottom plate is provided with at least one pair of positioning holes, the pair of positioning holes are arranged on the inner and outer sides of the supporting plate, one end of the supporting rod is screwed with the positioning hole, the other end of the supporting rod is further screwed with a locking nut, the supporting rod further penetrates the limiting hole, one end of the pressing plate is screwed with one end of the spacer rod, the other end of the spacer rod abuts against the bottom plate, the other end of the pressing plate is fixedly connected with one end of the pressing rod, and the other end of the pressing rod abuts against the guide pressing groove.

[0011] The supporting rod further penetrates the gasket, and the gasket is clamped between the pressing plate and the locking nut.

[0012] The limiting hole is a waist-round through hole.

[0013] The surface of the bottom plate is further provided with a positioning step, and the spacer rod extends into the positioning step.

[0014] The supporting plate is a circular ring body shape.

[0015] The bottom plate is a circular ring body shape.

[0016] The beneficial effects of the present application are that: by using the technical scheme of the present application, the workpiece is clamped between the first profiling surface and the second profiling surface, the rigidity of the workpiece is increased, the workpiece maintains a stable positioning position during the cutting process, which lays a foundation for improving the cutting precision, in addition, by arranging the guide pressing groove on the surface of the pressing block, when the clamping force is applied through the guide pressing groove, the clamping force can be uniformly distributed on the surface of the pressing block, so that the workpiece can withstand uniform clamping force everywhere, and the workpiece can further maintain a stable position during the cutting process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is the front view of the present application; Fig. 2 is the front view of the supporting plate of the present application; Fig. 3 is the front view of the pressing block of the present application.

[0018] In the figure: 1-bottom plate, 2-supporting plate, 3-pressing block, 4-first profiling surface, 5-second profiling surface, 6-guide pressing groove, 7-pin, 8-damping rubber pad, 9-pressing plate, 10-supporting rod, 11-spacer rod, 12-pressing rod, 13-limiting hole, 14-positioning hole, 15-locking nut, 16-gasket, 17-positioning step. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below, but the scope of protection is not limited to what is described.

[0020] like Figs. 1 to 3 As shown, the present invention provides a machining fixture for the inner and outer surfaces of a thin-walled annular workpiece, comprising a base plate 1, a support plate 2, and a pressure block 3. The lower end face of the support plate 2 is fixedly connected to the base plate 1, the upper end face of the support plate 2 is configured as a first contouring surface 4, the lower end face of the pressure block 3 is configured as a second contouring surface 5, and the upper end face of the pressure block 3 is provided with a pressure guide groove 6. The support plate 2 and the pressure block 3 are fixedly connected, and the workpiece is clamped between the first contouring surface 4 and the second contouring surface 5. The pressure guide groove 6 is in the shape of an inverted cone, a hemispherical shape, or an inverted regular pyramid shape.

[0021] By employing the technical solution of this invention, the workpiece is clamped between the first contour surface and the second contour surface, which increases the rigidity of the workpiece and enables it to maintain a stable positioning position during the cutting process, laying the foundation for improving the cutting accuracy. In addition, by setting pressure guide grooves on the surface of the pressure block, when clamping force is applied through the pressure guide grooves, the clamping force can be evenly distributed on the surface of the pressure block, so that the workpiece bears uniform clamping force at all parts, further enabling the workpiece to maintain a stable position during the cutting process.

[0022] Specifically, the support plate 2 and the pressure block 3 are fixedly connected by at least one pair of pins 7, which are arranged on the left and right sides of the pressure guide groove 6. A vibration damping pad 8 is also adhered to the second contoured surface 5, and the vibration damping pad 8 is sandwiched between the workpiece and the second contoured surface 5. By adopting the technical solution of this invention, by setting the vibration damping pad 8 and sandwiching it between the workpiece and the second contoured surface 5, the overall rigidity of the workpiece is increased, and the vibration damping pad 8 can also absorb vibrations from the external environment, laying the foundation for improving machining accuracy.

[0023] In addition, the fixture for machining the inner and outer surfaces of a thin-walled annular workpiece also includes a pressure plate 9, a support rod 10, a pad rod 11, and a pressure rod 12. The surface of the pressure plate 9 is provided with a limiting hole 13, and the surface of the base plate 1 is provided with at least one pair of positioning holes 14, which are located on the inner and outer sides of the support plate 2. One end of the support rod 10 is screwed to the positioning hole 14, and the other end of the support rod 10 is also screwed to a locking nut 15. The support rod 10 also passes through the limiting hole 13. One end of the pressure plate 9 is screwed to one end of the pad rod 11, and the other end of the pad rod 11 abuts against the base plate 1. The other end of the pressure plate 9 is fixedly connected to one end of the pressure rod 12, and the other end of the pressure rod 12 abuts against the pressure guide groove 6. By using the technical solution of this invention, by providing at least one pair of positioning holes 14 on the surface of the base plate 1 and arranging each pair of positioning holes 14 on the inner and outer sides of the support plate 2, the workpiece can be clamped from both the inside and outside of the support plate 2, improving the clamping flexibility of the fixture.

[0024] Further, the supporting rod 10 also penetrates the washer 16, which is clamped between the pressing plate 9 and the locking nut 15. The limiting hole 13 is a waist-round through hole. The surface of the bottom plate 1 is also provided with a positioning step 17, and the pad rod 11 extends into the positioning step 17. The supporting plate 2 is in the shape of a circular ring. The bottom plate 1 is in the shape of a circular ring.

Claims

1. A fixture for machining the inner and outer surfaces of a thin-walled annular workpiece, characterized in that: The device includes a base plate (1), a support plate (2), and a pressure block (3). The lower end face of the support plate (2) is fixedly connected to the base plate (1). The upper end face of the support plate (2) is set as a first contour surface (4). The lower end face of the pressure block (3) is set as a second contour surface (5). The upper end face of the pressure block (3) is provided with a pressure guide groove (6). The support plate (2) and the pressure block (3) are fixedly connected, and the workpiece is clamped between the first contour surface (4) and the second contour surface (5). The pressure guide groove (6) is in the shape of an inverted cone, a hemispherical shape, or an inverted regular pyramid.

2. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 1, characterized in that: The pallet (2) and the pressure block (3) are fixed together by at least one pair of pins (7), which are located on the left and right sides of the pressure guide groove (6).

3. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 1, characterized in that: A damping pad (8) is also bonded to the second contour surface (5), and the damping pad (8) is sandwiched between the workpiece and the second contour surface (5).

4. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 1, characterized in that: The thin-walled annular workpiece inner and outer surface cutting fixture also includes a pressure plate (9), a support rod (10), a pad rod (11), and a pressure rod (12). The surface of the pressure plate (9) is provided with a limiting hole (13), and the surface of the base plate (1) is provided with at least a pair of positioning holes (14). The pair of positioning holes (14) are arranged on the inner and outer sides of the support plate (2). One end of the support rod (10) is screwed to the positioning hole (14), and the other end of the support rod (10) is also screwed to the locking nut (15). The support rod (10) also passes through the limiting hole (13). One end of the pressure plate (9) is screwed to one end of the pad rod (11), and the other end of the pad rod (11) abuts against the base plate (1). The other end of the pressure plate (9) is fixedly connected to one end of the pressure rod (12), and the other end of the pressure rod (12) abuts against the pressure guide groove (6).

5. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 4, characterized in that: The support rod (10) also passes through the washer (16), which is sandwiched between the pressure plate (9) and the locking nut (15).

6. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 4, characterized in that: The limiting hole (13) is an oval through hole.

7. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 4, characterized in that: The surface of the base plate (1) is also provided with a positioning step (17), and the pad rod (11) extends into the positioning step (17).

8. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 1 or 4, characterized in that: The tray (2) is in the shape of a ring.

9. The machining fixture for the inner and outer surfaces of a thin-walled annular workpiece as described in claim 1 or 4, characterized in that: The base plate (1) is in the shape of a toroid.

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