Cutting machining clamp for annular thin-wall workpiece

Abstract

The cutting machining clamp for the annular thin-wall workpiece comprises a base and a pressing device, the pressing device comprises a pressing block, a spring, a screw rod and a positioning block, the screw rod is in threaded connection with the positioning block, the positioning block is embedded and fixedly riveted in the base, a limiting hole is formed in the surface of the pressing block, and the screw rod further penetrates through the limiting hole and the spring. And the spring is clamped between the pressing block and the positioning block. By the adoption of the technical scheme, the pressing force is evenly applied to the periphery of the annular thin-wall workpiece through the multiple pressing devices, the overall rigidity of the workpiece is improved, and when the workpiece is clamped, an operator can measure the compression amount or deformation amount of the spring through a measuring tool and rotate the threaded rod, so that the workpiece can be accurately clamped. The compression amount or the deformation amount of the spring is kept consistent as far as possible, so that the matching length of a thread pair between each screw rod and the positioning block is kept consistent, the pressing force generated by each pressing plate on the surface of a workpiece is kept consistent as far as possible, the workpiece is correctly aligned, and the cutting machining precision of the workpiece is favorably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting fixtures, and particularly relates to a cutting fixture for annular thin-walled workpieces. Background Art

[0002] Thin-walled annular parts are components widely used in various mechanical equipment or devices. When machining the outer contour of such workpieces, in order to prevent the workpieces from deforming during machining, multiple pressing plates are usually used to clamp the workpieces tightly.

[0003] For example, the patent document with the publication number of "CN220659986U" discloses a cutting fixture for thin-walled annular workpieces, which includes a base and multiple pressing devices. The pressing device includes a main support block, a support rod, a support bar and a pressing plate. The lower ends of the support rod and the support bar are both screwed to the base, the upper end of the support rod is screwed to a locking nut, the base is also fixedly connected to the main support block, and a main positioning step is provided on the surface of the main support block, a limiting hole is provided on the surface of the pressing plate, a convex platform is provided on the surface of the thin-walled annular workpiece, the support rod also passes through the limiting hole, and the upper end of the support bar abuts against one end of the pressing plate, and the convex platform is clamped between the other end of the pressing plate and the main positioning step. With the technical solution of this patent, multiple pressing plates are used to clamp the workpiece tightly, and the multiple pressing plates are arranged at equal intervals along the central axis of the workpiece. However, the pressing force generated by the pressing plate on the surface of the workpiece depends on the threaded pair matching length between the support rod and the base. When the operator clamps the workpiece, the operator cannot directly observe the threaded pair matching length between the support rod and the base with the naked eye, so that the threaded pair matching lengths between the respective support rods and the base cannot be kept in a consistent state, and then the pressing forces generated by the respective pressing plates on the surface of the workpiece will also be different, resulting in the workpiece not being correctly positioned and clamped, which has a negative impact on the machining accuracy of the workpiece. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a cutting fixture for annular thin-walled workpieces.

[0005] The utility model is achieved through the following technical solutions.

[0006] The utility model provides a cutting fixture for annular thin-walled workpieces, which includes a base and a pressing device. The pressing device includes a pressing block, a spring, a screw rod and a positioning block. The screw rod is screwed to the positioning block, the positioning block is embedded and riveted in the base, a limiting hole is provided on the surface of the pressing block, the screw rod also passes through the limiting hole and the spring, and the spring is clamped between the pressing block and the positioning block.

[0007] At least one side surface of the positioning block is flush with the surface of the base.

[0008] The positioning block can be replaced by a round nut.

[0009] The limiting hole is an oval stepped through hole.

[0010] The number of the pressing devices is multiple, and the multiple pressing devices are arranged at equal intervals around the central axis of the base.

[0011] The number of the pressing devices is more than 12.

[0012] One end of the lifting nail is also screwed to the base, and a lifting ring is provided at the other end of the lifting nail.

[0013] The cutting fixture for the annular thin-walled workpiece further includes a backing plate, and a positioning step is further provided on the surface of the base, and the backing plate is sleeved in the positioning step.

[0014] The backing plate and the base are also fixedly connected together by a first pin rod.

[0015] The cutting fixture for the annular thin-walled workpiece further includes a pressing ring, and the pressing ring and the base are also fixedly connected together by a second pin rod.

[0016] The beneficial effects of the present utility model are as follows: By adopting the technical solution of the present utility model, a pressing force is evenly applied to the periphery of the annular thin-walled workpiece through multiple pressing devices, improving the overall rigidity of the workpiece, so as to facilitate the machining of the required shape elements on the workpiece. When clamping the workpiece, the operator can use a measuring tool to measure the spring compression amount or deformation amount, and by rotating the screw rod, the spring compression amount or deformation amount is made to be as consistent as possible, so that the threaded pair engagement length between each screw rod and the positioning block is kept consistent, and the pressing force generated by each pressing plate on the workpiece surface is made to be as consistent as possible, enabling the workpiece to be correctly aligned, which helps to improve the cutting machining accuracy of the workpiece. Description of the Drawings

[0017] Figure 1 is the top view of the present utility model;

[0018] Figure 2 is the sectional view of the present utility model cut along the Figure 1 A-A plane in;

[0019] Figure 3 is the top view of the base of the present utility model;

[0020] Figure 4 is the top view of the pressing ring of the present utility model;

[0021] Figure 5 is the front view of the lifting nail of the present utility model;

[0022] Figure 6 is the present utility model Figure 2 local enlarged view at I in.

[0023] In the figure: 1 - base, 2 - pressing device, 3 - pressing block, 4 - spring, 5 - screw, 6 - positioning block, 7 - limiting hole, 8 - lifting nail, 9 - backing plate, 10 - positioning step, 11 - first pin rod, 12 - pressing ring, 13 - second pin rod, 14 - lifting ring, 15 - annular thin-walled workpiece. Specific embodiments

[0024] The technical solution of the present invention will be further described below, but the scope of protection claimed is not limited thereto.

[0025] As Figures 1 to 6 shown, the present invention provides a cutting fixture for an annular thin-walled workpiece, including a base 1 and a pressing device 2. The pressing device 2 includes a pressing block 3, a spring 4, a screw 5 and a positioning block 6. The screw 5 is screwed with the positioning block 6, and the positioning block 6 is embedded and riveted in the base 1. A limiting hole 7 is provided on the surface of the pressing block 3. The screw 5 also passes through the limiting hole 7 and the spring 4, and the spring 4 is clamped between the pressing block 3 and the positioning block 6.

[0026] Adopting the technical solution of the present invention, uniform pressing forces are applied to the periphery of the annular thin-walled workpiece 15 by multiple pressing devices, improving the overall rigidity of the workpiece, so as to facilitate machining the required shape elements on the workpiece. When clamping the workpiece, the operator can use a measuring tool to measure the compression amount or deformation amount of the spring, and by rotating the screw, make the compression amount or deformation amount of the spring as consistent as possible, so that the threaded pair matching length between each screw and the positioning block is consistent, and the pressing forces generated by each pressing plate on the workpiece surface are as consistent as possible, correctly aligning the workpiece, which helps to improve the cutting accuracy of the workpiece.

[0027] Specifically, at least one side surface of the positioning block 6 is flush with the surface of the base 1. The positioning block 6 can be replaced by a round nut. The base 1 can be pre-machined with several riveting holes on its surface by a numerical control machine tool, so as to ensure the riveting position accuracy of the positioning block 6 relative to the surface of the base 1, and make the pressing block apply uniform pressing forces to each local area around the workpiece.

[0028] In addition, the limiting hole 7 is an oval stepped through hole. Preferably, the pressing block 3 is integrally L-shaped. The number of the pressing devices 2 is multiple, and the multiple pressing devices 2 are arranged at equal intervals around the central axis of the base 1. The number of the pressing devices 2 is more than 12.

[0029] In addition, the base 1 is also screwed with one end of a lifting nail 8, and a lifting ring 14 is provided at the other end of the lifting nail 8. Thus, it is convenient to lift and transport the base.

[0030] In addition, the cutting fixture for the annular thin-walled workpiece further includes a backing plate 9. A positioning step 10 is also provided on the surface of the base 1, and the backing plate 9 is sleeved in the positioning step 10. Thus, the central axis of the backing plate 9 coincides with the central axis of the base 1. The backing plate 9 and the base 1 are also fixedly connected together by a first pin rod 11, ensuring the position accuracy between the backing plate 9 and the base 1. The cutting fixture for the annular thin-walled workpiece further includes a pressure ring 12, and the pressure ring 12 and the base 1 are also fixedly connected together by a second pin rod 13. The pressure ring 12 is integrally in the shape of a closed ring. The workpiece is clamped between the pressure ring 12 and the backing plate 9, so that the pressing force generated by the pressing block 3 is indirectly transmitted through the pressure ring 12. The pressure ring 12 further evenly divides the pressing force generated by each pressing block 3, enabling the workpiece to be evenly stressed around its circumference, correctly aligned, and thus improving the cutting accuracy of the workpiece.

Claims

1. A cutting fixture for annular thin-walled workpieces, characterized in that: The invention comprises a base (1) and a clamping device (2), wherein the clamping device (2) comprises a clamping block (3), a spring (4), a screw rod (5) and a positioning block (6), wherein the screw rod (5) is screwed to the positioning block (6), and the positioning block (6) is embedded and riveted into the base (1), and a limiting hole (7) is provided on the surface of the clamping block (3), and the screw rod (5) also passes through the limiting hole (7) and the spring (4), and the spring (4) is clamped between the clamping block (3) and the positioning block (6).

2. The cutting fixture for annular thin-walled workpiece according to claim 1, characterized in that: At least one side surface of the positioning block (6) is flush with the surface of the base (1).

3. The cutting fixture for annular thin-walled workpiece according to claim 1 or 2, characterized in that: The positioning block (6) can be replaced by a circular nut.

4. The cutting fixture for annular thin-walled workpiece according to claim 1, characterized in that: The limiting hole (7) is a waist-circular stepped through hole.

5. The cutting fixture for annular thin-walled workpiece according to claim 1, characterized in that: The number of the clamping devices (2) is multiple, and the multiple clamping devices (2) are arranged at equal intervals around the central axis of the base (1).

6. The cutting fixture for annular thin-walled workpiece according to claim 5, characterized in that: The number of the pressing devices (2) is more than 12.

7. The cutting fixture for annular thin-walled workpiece according to claim 1, characterized in that: The base (1) is also screwed to one end of a lifting nail (8), and the other end of the lifting nail (8) is provided with a lifting ring (14).

8. The cutting fixture for annular thin-walled workpiece according to claim 1, 2, 5 or 7, characterized in that: The cutting and machining fixture for the annular thin-walled workpiece also includes a backing plate (9), and the surface of the base (1) is also provided with a positioning recessed step (10), and the backing plate (9) is sleeved in the positioning recessed step (10).

9. The cutting fixture for annular thin-walled workpiece according to claim 8, characterized in that: The pad (9) and the base (1) are also fixedly connected together using a first pin rod (11).

10. The cutting fixture for annular thin-walled workpiece according to claim 9, characterized in that: The cutting and machining fixture for the annular thin-walled workpiece also includes a pressure ring (12), and the pressure ring (12) and the base (1) are fixedly connected together by a second pin rod (13).

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