A round ring body workpiece clamping fixture

Abstract

The utility model provides a kind of annular body shape workpiece clamping fixture, including bottom plate, backing plate and briquet, the lower end surface of backing plate is fixedly connected with bottom plate, the upper end surface of backing plate is set as first profiling surface, the lower end surface of briquet is set as second profiling surface, the upper end surface of briquet is equipped with guide pressure groove, backing plate is fixedly connected with briquet, and make workpiece clamping between first profiling surface and second profiling surface, guide pressure groove is inverted conical body shape, hemispherical shape or inverted right prism body shape.Adopt the technical scheme of the utility model, by making workpiece clamping between first profiling surface and second profiling surface, increase the rigidity of workpiece, make workpiece keep stable positioning position in cutting process, lay the foundation for improving cutting precision, in addition, when applying clamping force by guide pressure groove, make clamping force can be evenly distributed on briquet surface, make workpiece everywhere bear uniform clamping force, further make workpiece keep stable position in cutting process.

Description

Technical Field

[0001] This utility model belongs to the field of fixture technology, and in particular relates to a clamping fixture for a ring-shaped workpiece. Background Technology

[0002] With the continuous development of machining technology, people have higher and higher requirements for the shape and performance of mechanical parts. In order to keep the workpiece in a stable position during the cutting process, special fixtures are used to clamp the workpiece.

[0003] For example, patent document CN112338603A discloses an auxiliary machining fixture and its machining method for open thin-walled ring parts. The auxiliary machining fixture includes a base and a cover plate. The base has a flange, and the cover plate has a flange. The base and the cover plate are connected together by fasteners. The flange and the flange are opposite to each other, so that multiple open thin-walled ring parts can be stacked and clamped between the flange and the flange. The machining method includes using the auxiliary machining fixture as described above and clamping multiple blanks, cutting the blanks into closed ring parts by a machine tool; then cutting the closed ring parts radially to obtain multiple open thin-walled ring parts. By using this patented technical solution, the overall rigidity of the blanks is improved and the machining difficulty is reduced by using a special fixture to clamp and fix the blanks.

[0004] However, during the machining of a certain type of thin-walled ring, the overall shape and size of the part are extremely large, and the upper and lower end faces of the workpiece are uneven irregular surfaces. Due to the large size, thin walls, poor rigidity, and poor machining stability of the part, it is difficult to guarantee the dimensional machining accuracy using conventional cutting methods, resulting in a high product scrap rate. Therefore, it is urgent to develop a new type of special fixture. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a clamping fixture for a ring-shaped workpiece.

[0006] This utility model is achieved through the following technical solution.

[0007] This utility model provides a clamping fixture for a ring-shaped workpiece, including a base plate, a support plate, and a pressure block. The lower end face of the support plate is fixedly connected to the base plate, the upper end face of the support plate is configured as a first contouring surface, the lower end face of the pressure block is configured as a second contouring surface, and the upper end face of the pressure block is provided with a pressure guide groove. The support plate and the pressure block are fixedly connected, and the workpiece is clamped between the first contouring surface and the second contouring surface. The pressure guide groove is in the shape of an inverted cone, a hemispherical shape, or an inverted regular pyramid shape.

[0008] The pallet and the pressure block are fixed together by at least one pair of pins, which are located on the left and right sides of the pressure guide groove.

[0009] A vibration damping pad is also adhered to the second contour surface, and the vibration damping pad is sandwiched between the workpiece and the second contour surface.

[0010] The ring-shaped workpiece clamping fixture further includes a pressure plate, a support rod, a pad rod, and a pressure rod. The surface of the pressure plate is provided with a limiting hole, and the surface of the base plate is provided with at least one pair of positioning holes, which are arranged on the inner and outer sides of the support plate. One end of the support rod is screwed to the positioning hole, and the other end of the support rod is also screwed to a locking nut. The support rod also passes through the limiting hole. One end of the pressure plate is screwed to one end of the pad rod, and the other end of the pad rod abuts against the base plate. The other end of the pressure plate is fixedly connected to one end of the pressure rod, and the other end of the pressure rod abuts against the pressure guide groove.

[0011] The support rod also passes through a washer, which is sandwiched between the pressure plate and the lock nut.

[0012] The limiting hole is an oval-shaped through hole.

[0013] The surface of the base plate is also provided with a positioning step, and the pad rod extends into the positioning step.

[0014] The tray is in the shape of a ring.

[0015] The base plate is in the shape of a ring.

[0016] The beneficial effects of this utility model are as follows: By using the technical solution of this utility model, the workpiece is clamped between the first contour surface and the second contour surface, which increases the rigidity of the workpiece and enables the workpiece to maintain a stable positioning position during the cutting process, thus laying the foundation for improving the cutting accuracy. In addition, by setting a pressure guide groove on the surface of the pressure block, when the clamping force is applied through the pressure guide groove, the clamping force can be evenly distributed on the surface of the pressure block, so that the workpiece bears a uniform clamping force, further enabling the workpiece to maintain a stable position during the cutting process. Attached Figure Description

[0017] Figure 1 This is the front view of this utility model;

[0018] Figure 2 This is a front view of the tray of this utility model;

[0019] Figure 3 This is the front view of the pressure block of this utility model.

[0020] In the diagram: 1-base plate, 2-support plate, 3-pressure block, 4-first contoured surface, 5-second contoured surface, 6-pressure guide groove, 7-pin, 8-vibration damping pad, 9-pressure plate, 10-support rod, 11-pad rod, 12-pressure rod, 13-limiting hole, 14-positioning hole, 15-locking nut, 16-washer, 17-positioning step. Detailed Implementation

[0021] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0022] like Figures 1 to 3 As shown, this utility model provides a clamping fixture for a ring-shaped workpiece, including 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 contouring surface 4, the lower end face of the pressure block 3 is set 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.

[0023] By employing the technical solution of this utility model, the workpiece is clamped between the first and second contour surfaces, 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.

[0024] 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 contour surface 5, and the vibration damping pad 8 is sandwiched between the workpiece and the second contour surface 5. By adopting the technical solution of this utility model, and by setting the vibration damping pad 8 and sandwiching it between the workpiece and the second contour 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.

[0025] In addition, the ring-shaped workpiece clamping 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 one 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. By adopting the technical solution of this utility model, 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, thus improving the clamping flexibility of the fixture.

[0026] In addition, the support rod 10 passes through the washer 16, which is clamped between the pressure plate 9 and the locking nut 15. The limiting hole 13 is an oval through hole. 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. The support plate 2 is in the shape of a ring. The base plate 1 is in the shape of a ring.

Claims

1. A round body workpiece clamping fixture, characterized by: 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. A toroidal workpiece holding fixture as claimed in claim 1, wherein: 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 toroidal workpiece chucking fixture of claim 1 wherein: 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 toroidal workpiece chucking fixture of claim 1 wherein: The ring-shaped workpiece clamping 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 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 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 toroidal workpiece chucking fixture of claim 4 wherein: 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 toroidal workpiece chucking fixture of claim 4 wherein: The limiting hole (13) is an oval through hole.

7. The toroidal workpiece chucking fixture of claim 4 wherein: 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 toroidal workpiece chucking fixture of claim 1 or 4, wherein: The tray (2) is in the shape of a ring.

9. The toroidal workpiece chucking fixture of claims 1 or 4, wherein: The base plate (1) is in the shape of a toroid.

Images