Annular workpiece clamp

Abstract

The annular workpiece clamp comprises a base and a pressing device, the base is fixedly connected with a supporting plate, the pressing device comprises a pressing block, a supporting rod and a pressing bolt, the pressing block is integrally in a T shape and comprises a lever plate and a pressing plate, one end of the supporting rod is in threaded connection with one end of the lever plate, the other end of the supporting rod abuts against the surface of the base, and the pressing bolt is arranged on the pressing plate. One end of the lever plate is fixedly connected with the base, the other end of the lever plate is fixedly connected with the pressing plate, a limiting hole is further formed in the surface of the lever plate, and the compression bolt penetrates through the limiting hole and is in threaded connection with the base, so that the annular workpiece is clamped between the pressing plate and the supporting plate. According to the technical scheme, the T-shaped pressing blocks apply pressing force to a plurality of positions on the periphery of the annular workpiece, compared with the prior art, the contact area of the pressing plate and the annular workpiece is larger, the annular workpiece is stressed more evenly, deformation errors on the periphery of the workpiece are kept basically consistent, the overall rigidity of the workpiece is improved, and the machining efficiency is improved. And therefore, required shape elements can be conveniently machined on the workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of cutting fixtures, and particularly relates to a fixture for annular 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 the machining process, multiple lever plates (5) are usually used to clamp the workpieces tightly.

[0003] For example, the patent document with the publication number "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.

[0004] Adopting 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 contact area between the pressing plate and the workpiece surface is always limited, and the acting points of the pressing force generated by the pressing plate on the workpiece surface are also correspondingly limited, which still causes uneven stress on the workpiece surface and affects the machining accuracy of the workpiece. In addition, the pressing force generated by the pressing plate on the workpiece surface 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 support rods and the base cannot be kept in a consistent state. Subsequently, the pressing forces generated by the pressing plates on the workpiece surface will also be different, causing the workpiece not to be correctly positioned and clamped, which has a negative impact on the machining accuracy of the workpiece. Summary of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides a fixture for annular workpieces.

[0006] The utility model is realized through the following technical solutions.

[0007] The utility model provides a clamping fixture for annular workpieces, which comprises a base and a pressing device. The base is fixedly connected with a supporting plate. The pressing device includes a pressing block, a supporting rod and a pressing bolt. The pressing block is in a T shape as a whole and includes a lever plate and a pressing plate. One end of the supporting rod is screwed to one end of the lever plate, and the other end of the supporting rod abuts against the surface of the base. The other end of the lever plate is fixedly connected with the pressing plate. A limiting hole is further arranged on the surface of the lever plate. The pressing bolt penetrates through the limiting hole and is screwed to the base, so that the annular workpiece is clamped between the pressing plate and the supporting plate.

[0008] The pressing device further includes a spring. The pressing bolt further penetrates through the spring, and the spring is clamped between the lever plate and the base.

[0009] The pressing bolt further penetrates through a washer, and the washer is clamped between the spring and the lever plate.

[0010] The limiting hole is an oval through hole.

[0011] The supporting rod is further screwed to a locking nut, and the surface of the locking nut can be abutted against the surface of the lever plate.

[0012] The supporting plate is further fixedly connected with a supporting ring, and the supporting ring penetrates through the annular workpiece.

[0013] The number of the pressing devices is multiple. The multiple pressing devices are arranged at equal intervals around the central axis of the base, and the gap between two adjacent pressing plates does not exceed 10 mm.

[0014] The base is further fixedly connected with a plurality of handles. The multiple handles are arranged at equal intervals around the central axis of the base.

[0015] The base is in a disc shape as a whole.

[0016] The pressing plate and the lever plate are integrally formed.

[0017] The beneficial effects of the utility model are as follows: adopting the technical scheme of the utility model, the pressing force is applied to multiple positions around the annular workpiece through the T-shaped pressing block. Compared with the prior art, the contact area between the pressing plate and the annular workpiece is larger, so that the annular workpiece is stressed more evenly, the deformation error around the workpiece is kept basically consistent, the overall rigidity of the workpiece is improved, and thus it is convenient to machine the required shape elements on the workpiece. In addition, 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 bolt, the compression amount or deformation amount of the spring is made to be as consistent as possible, so that the thread pair matching length between each bolt and the base is kept consistent, the pressing force generated by each pressing plate on the workpiece surface is made to be as consistent as possible, and the workpiece is convenient to be correctly aligned, laying a foundation for improving the cutting processing accuracy of the workpiece. Brief Description of the Drawings

[0018] Figure 1 is the front view of the present utility model;

[0019] Figure 2 is the present utility model Figure 1 partial enlarged view at position I in;

[0020] Figure 3 is the top view of the present utility model;

[0021] Figure 4 is the top view of the pressing block of the present utility model.

[0022] In the figure: 1 - base, 2 - pressing device, 3 - support plate, 4 - pressing block, 5 - lever plate, 6 - pressing plate, 7 - limiting hole, 8 - supporting rod, 9 - pressing bolt, 10 - spring, 11 - washer, 12 - locking nut, 13 - support ring, 14 - handle, 15 - annular workpiece. Detailed Description of the Preferred Embodiment

[0023] The technical solution of the present utility model will be further described below, but the scope of protection is not limited thereto.

[0024] As Figures 1 to 4 shown, the present utility model provides a fixture for an annular workpiece, which includes a base 1 and a pressing device 2. The base 1 is fixedly connected to a support plate 3. The pressing device 2 includes a pressing block 4, a supporting rod 8 and a pressing bolt 9. The pressing block 4 is in a T - shape as a whole and the pressing block 4 includes a lever plate 5 and a pressing plate 6. One end of the supporting rod 8 is screwed to one end of the lever plate 5, and the other end of the supporting rod 8 abuts against the surface of the base 1. The other end of the lever plate 5 is fixedly connected to the pressing plate 6. A limiting hole 7 is also provided on the surface of the lever plate 5. The pressing bolt 9 passes through the limiting hole 7 and is screwed to the base 1, so that the annular workpiece is clamped between the pressing plate 6 and the support plate 3.

[0025] Adopting the technical solution of the present utility model, pressing forces are applied to multiple positions around the annular workpiece through the T - shaped pressing block. Compared with the prior art, the contact area between the pressing plate and the annular workpiece is larger, making the force on the annular workpiece more uniform, keeping the deformation error around the workpiece basically the same, improving the overall rigidity of the workpiece, and thus facilitating the machining of the required shape elements on the workpiece. In addition, 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 bolt, make the compression amount or deformation amount of the spring as consistent as possible, so that the mating length of the thread pair between each bolt and the base is consistent, making the pressing forces generated by each pressing plate on the workpiece surface as consistent as possible, and making it convenient for the workpiece to be correctly aligned, laying a foundation for improving the cutting machining accuracy of the workpiece.

[0026] Specifically, the pressing device 2 further includes a spring 10. The pressing bolt 9 also passes through the spring 10, and the spring 10 is clamped between the lever plate 5 and the base 1. The pressing bolt 9 also passes through a washer 11, and the washer 11 is clamped between the spring 10 and the lever plate 5. Preferably, the limiting hole 7 is an oval through-hole. With the technical solution of the present utility model, when clamping a workpiece, the operator can use a measuring tool to measure the compression amount or deformation amount of the spring, and by rotating the bolt, make the compression amount or deformation amount of the spring as consistent as possible, so that the mating length of the thread pairs between each bolt and the base is consistent, and the pressing forces generated by each pressing plate on the surface of the workpiece are as consistent as possible, making it convenient for the workpiece to be correctly aligned, laying a foundation for improving the cutting accuracy of the workpiece.

[0027] In addition, the support rod 8 is also screwed with a lock nut 12, and the surface of the lock nut 12 can be juxtaposed with the surface of the lever plate 5. Thus, after the operator completes the assembly work of the present utility model, by juxtaposing the surface of the lock nut 12 with the surface of the lever plate 5, the relative positions between each component and the workpiece are kept stable.

[0028] Furthermore, the support plate 3 is also fixedly connected with a support ring 13, and the support ring 13 passes through the annular workpiece. 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, and the gap between two adjacent pressing plates 6 does not exceed 10 mm. Preferably, the number of the pressing devices 22 is more than 16. Thus, the contact area between the pressing plate and the annular workpiece can cover the surface of the entire annular workpiece as much as possible, making the force on the workpiece surface more uniform, laying a foundation for improving the machining accuracy of the workpiece.

[0029] Specifically, the base 1 is also fixedly connected with a plurality of handles 14, and the multiple handles 14 are arranged at equal intervals around the central axis of the base 1. Preferably, the number of the handles 14 is more than 4. The base 1 is in an overall disc shape. The pressing plate 6 and the lever plate 5 are integrally formed.

Claims

1. A ring-shaped workpiece fixture, characterized in that: It comprises a base (1) and a clamping device (2), wherein the base (1) is fixedly connected to a support plate (3), and the clamping device (2) comprises a clamping block (4), a supporting rod (8) and a clamping bolt (9), wherein the clamping block (4) is in a T-shape as a whole and comprises a lever plate (5) and a pressure plate (6), wherein one end of the supporting rod (8) is screwed to one end of the lever plate (5), and the other end of the supporting rod (8) abuts against the surface of the base (1), and the other end of the lever plate (5) is fixedly connected to the pressure plate (6), and a limiting hole (7) is also provided on the surface of the lever plate (5), and the clamping bolt (9) passes through the limiting hole (7), and the clamping bolt (9) is screwed to the base (1) so that the annular workpiece is clamped between the pressure plate (6) and the support plate (3).

2. The annular workpiece fixture according to claim 1, characterized in that: The clamping device (2) also includes a spring (10), the clamping bolt (9) also penetrates the spring (10), and the spring (10) is clamped between the lever plate (5) and the base (1).

3. The annular workpiece fixture according to claim 2, characterized in that: The clamping bolt (9) also passes through a washer (11), and the washer (11) is clamped between the spring (10) and the lever plate (5).

4. The annular workpiece fixture according to claim 1, characterized in that: The limiting hole (7) is a through hole in the shape of an oval.

5. The annular workpiece fixture according to claim 1, characterized in that: The support rod (8) is also threadedly connected to the locking nut (12), and the surface of the locking nut (12) and the surface of the lever plate (5) can be attached together.

6. The annular workpiece fixture according to claim 1, characterized in that: The support plate (3) is also fixedly connected to a support ring (13), and the support ring (13) passes through the annular workpiece.

7. The annular workpiece fixture according to claim 1 or 2, 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), and the gap between two adjacent pressing plates (6) does not exceed 10 mm.

8. The annular workpiece fixture according to claim 7, characterized in that: The base (1) is also fixedly connected to a plurality of handles (14), and the plurality of handles (14) are arranged at equal intervals around the central axis of the base (1).

9. The annular workpiece fixture according to claim 7, characterized in that: The base (1) is in the shape of a disc as a whole.

10. The annular workpiece fixture according to claim 1, characterized in that: The pressing plate (6) and the lever plate (5) are integrally manufactured.

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