Annular workpiece fixing jig

Abstract

The utility model provides an annular workpiece fixing jig which comprises a base assembly, a lifting adjusting assembly, a driving plate and a clamping jaw assembly, the base assembly comprises a fixing base and an annular mounting wall, the annular mounting wall is fixed above the fixing base, a mounting cavity is formed in the annular mounting wall, a clearance hole communicated with the mounting cavity is formed in the annular mounting wall, and the lifting adjusting assembly is arranged in the clearance hole. An annular flange is arranged on the periphery of the upper end of the annular mounting wall, the lower end of the lifting adjusting assembly is fixed to the fixed base, the driving plate is fixed to the upper end of the lifting adjusting assembly and corresponds to the interior of the mounting cavity, the lower end of the clamping jaw assembly penetrates through the receding hole and is connected with the driving plate, and a hook part is arranged at the upper end of the clamping jaw assembly and corresponds to the upper portion of the annular mounting wall. The inner wall machining device has the advantages that the annular workpiece is not stressed in the radial direction, deformation of the annular workpiece is avoided, no interference structure exists in the annular workpiece, and the inner wall of the annular workpiece is subjected to various machining through the inner wall machining device.

Description

Technical Field

[0001] The utility model relates to the field of machining clamping fixtures, and particularly relates to a fixing fixture for annular workpieces. Background Art

[0002] Before a workpiece is machined on a machining device, it needs to be clamped and fixed first. On existing devices, a three-jaw chuck is a commonly used fixing fixture. When clamping a cylindrical workpiece, the jaws of the three-jaw chuck clamp the outer periphery of the workpiece. When clamping an annular workpiece, the jaws are used to expand the workpiece outward from the inside of the annular workpiece to fix it. The three-jaw chuck can meet the clamping requirements of most workpieces. However, for relatively thin annular workpieces, when clamped with a three-jaw chuck, the outward expansion pressure is likely to deform the annular workpiece. Moreover, the jaws are inside the annulus, blocking the inner wall of the annulus, which is not conducive to the device for machining the inner wall of the annular workpiece, such as trimming the inner wall arc and chamfering the inner wall. Therefore, it is necessary to manufacture a fixing fixture for annular workpieces to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a fixing fixture for annular workpieces to solve the problems mentioned in the background art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A fixing fixture for annular workpieces includes a base assembly, a lifting and adjusting assembly, a driving plate, and a jaw assembly. The base assembly includes a fixed base and an annular mounting wall. The annular mounting wall is fixed above the fixed base. An installation cavity is provided inside the annular mounting wall. An avoidance hole communicating with the installation cavity is provided on the annular mounting wall. An annular edge is provided on the outer periphery of the upper end of the annular mounting wall. The lower end of the lifting and adjusting assembly is fixed on the fixed base. The driving plate is fixed at the upper end of the lifting and adjusting assembly and corresponds to the inside of the installation cavity. The lower end of the jaw assembly passes through the avoidance hole and is connected to the driving plate. A hook portion is provided at the upper end of the jaw assembly, and the hook portion corresponds to the upper side of the annular mounting wall.

[0006] Further description of the utility model: A threaded hole is provided in the middle of the fixed base. The lifting and adjusting assembly includes an adjusting bolt and a compression spring. The adjusting bolt passes through the driving plate. The lower end of the adjusting bolt is threadedly connected to the threaded hole. The compression spring is sleeved on the adjusting bolt. The upper and lower ends of the compression spring are in contact with the driving plate and the fixed base respectively.

[0007] Further description of the utility model: The installation cavity is cylindrical, the driving plate is cylindrical, and the outer periphery of the driving plate is slidably connected to the inner wall of the annular mounting wall.

[0008] Further description of the present utility model: The jaw assembly includes a connecting block and a jaw body. The connecting block is fixed below the driving plate. The lower end of the jaw body passes through the clearance hole and is hinged to the connecting block. A hook portion is provided at the upper end of the jaw body.

[0009] Further description of the present utility model: Three groups of jaw assemblies are provided and evenly distributed on the outer periphery of the driving plate.

[0010] The beneficial effects of the present utility model are as follows: The fixed base is used for installation on the equipment. For example, the three-jaw chuck on the equipment is used to clamp and fix the fixed base, thereby fixing the base assembly. Before placing the workpiece, the lifting and adjusting assembly raises the driving plate. The annular workpiece is placed on the top of the annular mounting wall and corresponds within the annular edge. Then, the lifting and adjusting assembly lowers the driving plate. The driving plate drives the jaw assembly to lower. The hook portion on the jaw assembly presses downward on the upper end face of the annular workpiece, so that the upper and lower ends of the annular workpiece are clamped by the hook portion and the annular mounting wall. The annular workpiece has no force in the radial direction and will not cause deformation of the annular workpiece. Moreover, inside the annular workpiece, there is no interference structure, and various processing operations can be performed on the inner wall of the annular workpiece using the equipment. Description of the Drawings

[0011] Figure 1 is the overall structure diagram of the present utility model;

[0012] Figure 2 is the partial cross-sectional view of the present utility model;

[0013] Figure 3 is the structure diagram of the base assembly in the present utility model;

[0014] Description of the Reference Numerals:

[0015] 1. Base assembly; 11. Fixed base; 111. Threaded hole; 12. Annular mounting wall; 121. Mounting cavity; 122. Clearance hole; 123. Annular edge; 2. Lifting and adjusting assembly; 21. Adjusting bolt;

[0016] 22. Compression spring; 3. Driving plate; 4. Jaw assembly; 41. Connecting block; 42. Jaw body;

[0017] 421. Hook portion. Detailed Description of the Preferred Embodiments

[0018] The present utility model will be further described below with reference to the accompanying drawings:

[0019] As Figures 1 to 3As shown in the figure, a fixing fixture for a ring workpiece includes a base assembly 1, a lifting and adjusting assembly 2, a driving plate 3, and a jaw assembly 4. The base assembly 1 includes a fixed base 11 and a ring-shaped mounting wall 12. The ring-shaped mounting wall 12 is fixed above the fixed base 11. An installation cavity 121 is provided inside the ring-shaped mounting wall 12. An avoidance hole 122 communicating with the installation cavity 121 is provided on the ring-shaped mounting wall 12. An annular edge 123 is provided on the outer periphery of the upper end of the ring-shaped mounting wall 12. The lower end of the lifting and adjusting assembly 2 is fixed on the fixed base 11. The driving plate 3 is fixed to the upper end of the lifting and adjusting assembly 2 and corresponds to the inside of the installation cavity 121. The lower end of the jaw assembly 4 passes through the avoidance hole 122 and is connected to the driving plate 3. A hook portion 421 is provided at the upper end of the jaw assembly 4, and the hook portion 421 corresponds to the upper part of the ring-shaped mounting wall 12.

[0020] The fixed base 11 is used to be installed on a device. For example, the fixed base 11 is clamped and fixed by a three-jaw chuck on the device, so as to fix the base assembly 1. Before placing the workpiece, the lifting and adjusting assembly 2 raises the driving plate 3, places the ring workpiece on the top of the ring-shaped mounting wall 12 and corresponding inside the annular edge 123. Then, the driving plate 3 is lowered through the lifting and adjusting assembly 2. The driving plate 3 drives the jaw assembly 4 to lower. The hook portion 421 on the jaw assembly 4 presses downward on the upper end surface of the ring workpiece, so that the upper and lower ends of the ring workpiece are clamped by the hook portion 421 and the ring-shaped mounting wall 12. The ring workpiece has no force in the radial direction and will not cause deformation of the ring workpiece. Moreover, inside the ring workpiece, there is no interference structure, and various processing can be carried out on the inner wall of the ring workpiece by using the device.

[0021] A threaded hole 111 is provided in the middle of the fixed base 11. The lifting and adjusting assembly 2 includes an adjusting bolt 21 and a compression spring 22. The adjusting bolt 21 passes through the driving plate 3. The lower end of the adjusting bolt 21 is threadedly connected to the threaded hole 111. The compression spring 22 is sleeved on the adjusting bolt 21. The upper and lower ends of the compression spring 22 are in contact with the driving plate 3 and the fixed base 11 respectively.

[0022] When driving the jaw assembly 4 to clamp the ring workpiece, the adjusting bolt 21 is tightened downward. The head of the adjusting bolt 21 presses down the driving plate 3, so that the driving plate 3 drives the hook portion 421 to lower. At the same time, the compression spring 22 is gradually compressed. After the processing of the ring workpiece is completed, the adjusting bolt 21 is loosened in the reverse direction, and the compression spring 22 gradually recovers, so that the driving plate 3 rises and the hook portion 421 also rises.

[0023] The installation cavity 121 is cylindrical, and the driving plate 3 is cylindrical. The outer periphery of the driving plate 3 is slidably connected to the inner wall of the ring-shaped mounting wall 12, which can make the driving plate 3 keep as horizontal as possible during the lifting process, so that the heights of the hook portions 421 in each group are the same. When clamping the ring workpiece, the pressure of the hook portion 421 on the workpiece is uniform, improving the clamping firmness.

[0024] The jaw assembly 4 includes a connecting block 41 and a jaw body 42. The connecting block 41 is fixed below the driving plate 3. The lower end of the jaw body 42 passes through the clearance hole 122 and is hinged to the connecting block 41. A hook portion 421 is provided at the upper end of the jaw body 42. Before placing the annular workpiece on the annular mounting wall 12, the jaw body 42 can be rotated outwards so that the hook portion 421 no longer blocks the upper part of the annular mounting wall 12, which is convenient for placing the annular workpiece.

[0025] Three groups of the jaw assemblies 4 are provided and evenly distributed on the outer periphery of the driving plate 3, which can clamp the annular workpiece at multiple points, make the force on the workpiece more uniform, and avoid deformation of the annular workpiece due to excessive local force.

[0026] The above does not impose any limitation on the technical scope of the present invention. Any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A ring-shaped workpiece fixing fixture, characterized in that: It includes a base assembly, a lifting and adjusting assembly, a driving plate and a clamping jaw assembly, the base assembly includes a fixed base and an annular mounting wall, the annular mounting wall is fixed above the fixed base, a mounting cavity is arranged in the annular mounting wall, a gap-avoiding hole communicating with the mounting cavity is arranged on the annular mounting wall, an annular rib is arranged on the outer periphery of the upper end of the annular mounting wall, the lower end of the lifting and adjusting assembly is fixed on the fixed base, the driving plate is fixed on the upper end of the lifting and adjusting assembly and corresponds to the mounting cavity, the lower end of the clamping jaw assembly passes through the gap-avoiding hole and is connected to the driving plate, the upper end of the clamping jaw assembly is provided with a hook, and the hook corresponds to the top of the annular mounting wall.

2. The annular workpiece fixing fixture according to claim 1, characterized in that: A threaded hole is provided in the middle of the fixed base, and the lifting adjustment assembly includes an adjusting bolt and a compression spring. The adjusting bolt passes through the driving plate, and the lower end of the adjusting bolt is threadedly connected to the threaded hole. The compression spring is sleeved on the adjusting bolt, and the upper and lower ends of the compression spring are respectively in contact with the driving plate and the fixed base.

3. The annular workpiece fixing fixture according to claim 1, characterized in that: The installation cavity is cylindrical, the driving plate is cylindrical, and the outer periphery of the driving plate is slidably connected to the inner wall of the annular installation wall.

4. The annular workpiece fixing fixture according to claim 1, characterized in that: The clamping jaw assembly comprises a connecting block and a clamping jaw body, wherein the connecting block is fixed below the driving plate, the lower end of the clamping jaw body passes through the air avoidance hole and is hinged to the connecting block, and the upper end of the clamping jaw body is provided with the hook portion.

5. The annular workpiece fixing fixture according to claim 1, characterized in that: The clamping jaw assemblies are arranged in three groups and are evenly distributed on the periphery of the driving plate.

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