Clamp for cutting outer surface of coaxial cylindrical shell workpiece

Abstract

The coaxial cylindrical shell workpiece outer surface cutting clamp comprises a base and a rotating shaft, the rotating shaft is installed on the base through a rolling bearing, the rotating shaft is further coaxially and fixedly connected with a driving bevel gear, the driving bevel gear is meshed with a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected to one end of a first lead screw, and the second bevel gear is fixedly connected to the other end of a second lead screw. The second bevel gear is fixedly connected to one end of a second lead screw, the other end of the first lead screw and the other end of the second lead screw are both in threaded connection with a sliding block, the thread rotating direction of the first lead screw is opposite to that of the second lead screw, the sliding block is further fixedly connected with an inner supporting seat, and an outer cylinder bottom groove is formed in the surface of the inner supporting seat. By the adoption of the technical scheme, the inner supporting seats synchronously and consistently support the left side and the right side of the workpiece, so that the rigidity of the workpiece is improved, workpiece deformation is reduced, the cutting machining precision of the workpiece is improved, the symmetry of the workpiece is effectively improved, and the symmetry degree of the workpiece is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting fixtures, and in particular relates to a cutting fixture for the outer surface of a coaxial cylindrical shell workpiece. Background Art

[0002] Thin-walled cylindrical workpieces are widely used parts in various mechanical equipment or devices. When cutting the outer contour of such workpieces, in order to prevent the workpieces from deforming during the processing, multiple clamping devices are usually used to clamp and clamp the workpieces.

[0003] For example, a patent document with publication number: "CN220659986U" discloses a thin-walled annular workpiece cutting and processing fixture, including a base and multiple internal support devices, the internal support device including a main support block, a support rod, a support rod and a pressure plate, the lower ends of the support rod and the lower ends of the support rod are screwed to the base, the upper ends of the support rods are screwed to the locking nut, the base is also fixedly connected to the main support block, and the surface of the main support block is provided with a main positioning platform, the surface of the pressure plate is provided with a limiting hole, the surface of the thin-walled annular workpiece is provided with a boss, the support rod is also inserted into the limiting hole, and the upper end of the support rod is abutted against one end of the pressure plate, and the boss is clamped between the other end of the pressure plate and the main positioning platform.

[0004] With this patented technical solution, a plurality of pressure plates are used to clamp the workpiece, and the plurality of pressure plates are arranged at equal intervals along the central axis of the workpiece. However, for an inner and outer double-cylinder thin-shell workpiece, the workpiece has an outer cylinder and an inner cylinder, and the inner cylinder and the outer cylinder are coaxially fixed together. When it is necessary to perform cutting processing on the outer peripheral surface of the outer cylinder, the pressure plate can often only generate a clamping force on the upper and lower ends of the workpiece. The inner wall surface of the workpiece does not have sufficient support, resulting in poor rigidity of the workpiece. When the outer peripheral surface of the workpiece is cut, the arch frame is prone to partial collapse, causing deformation of the workpiece, affecting the processing accuracy of the workpiece. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a coaxial cylindrical shell workpiece outer surface cutting fixture.

[0006] The present invention is achieved through the following technical solutions.

[0007] The present invention provides a coaxial cylindrical shell workpiece outer surface cutting fixture, comprising a base and a rotating shaft, wherein the rotating shaft is installed on the base using a rolling bearing, and the rotating shaft is also coaxially fixedly connected to an active bevel gear, and the active bevel gear is respectively meshed with a first bevel gear and a second bevel gear, the first bevel gear is fixedly connected to one end of a first lead screw, and the second bevel gear is fixedly connected to one end of a second lead screw, and the other end of the first lead screw and the other end of the second lead screw are both screwed to a slider, and the thread rotation directions of the first lead screw and the second lead screw are opposite, and the slider is also fixedly connected to an inner support seat, and the surface of the inner support seat is provided with an outer cylinder bottom groove.

[0008] The bottom groove of the outer cylinder is L-shaped as a whole.

[0009] A guide groove is also provided on the surface of the base, and the sliding block is sleeved in the guide groove.

[0010] The base is also fixedly connected to the lower end of the positioning cylinder, and the active bevel gear, the first bevel gear and the second bevel gear are all accommodated in the positioning cylinder. The upper end of the positioning cylinder is fixedly connected to the cover plate, and the cover plate is also fixedly connected to the lower end of the column screw. The upper end of the column screw is screwed to the locking block. The column screw also passes through the pressure plate, and the surface of the pressure plate is provided with an outer cylinder end groove.

[0011] The pressing plate is also fixedly connected with the inner support sleeve, and the outer diameter of the inner support sleeve is consistent with the inner diameter of the inner cylinder of the workpiece.

[0012] The outer diameter of the positioning cylinder is consistent with the inner diameter of the inner cylinder of the workpiece.

[0013] The locking block is a hexagonal nut.

[0014] The outer cylinder end groove is L-shaped as a whole.

[0015] The rotating shaft is also coaxially connected to the hand wheel, and the base is also fixedly connected to a plurality of legs.

[0016] The outer peripheral surface of the hand wheel is provided with straight knurling.

[0017] The beneficial effect of the present invention is that: by adopting the technical scheme of the present invention, when torque is applied to the rotating shaft, since the threads of the first screw and the second screw rotate in opposite directions, the corresponding sliders move away from each other until the outer cylinder bottom groove on the surface of the inner support seat tightens the lower end surface and the inner wall surface of the workpiece, and when the outer peripheral surface of the workpiece is cut, the tightening effect of the inner support seat on the workpiece increases the rigidity of the workpiece, thereby reducing the deformation of the workpiece and improving the cutting accuracy of the workpiece. In addition, in the process of making the inner support seat tighten both sides of the outer cylinder of the workpiece at the same time, since the first screw and the second screw can keep rotating synchronously, the tightening force of the inner support seat on the left and right sides of the workpiece remains consistent, which can effectively improve the symmetry of the workpiece and improve the symmetry of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view of the workpiece of the present invention;

[0019] Figure 2 It is the front view of the present invention.

[0020] In the figure: 1-base, 2-rotating shaft, 3-driving bevel gear, 4-first bevel gear, 5-second bevel gear, 6-first lead screw, 7-second lead screw, 8-slider, 9-inner support seat, 10-bottom groove of outer cylinder, 11-guide groove, 12-positioning cylinder, 13-cover plate, 14-column screw, 15-locking block, 16-pressure plate, 17-end groove of outer cylinder, 18-inner support sleeve, 19-handwheel, 20-leg, 21-workpiece, 22-inner cylinder, 23-outer cylinder. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0022] like Figure 1 to Figure 2 As shown, the present invention provides a coaxial cylindrical shell workpiece outer surface cutting fixture, including a base 1 and a rotating shaft 2, the rotating shaft 2 is installed on the base 1 using a rolling bearing, the rotating shaft 2 is also coaxially fixed with an active bevel gear 3, the active bevel gear 3 is meshed with a first bevel gear 4 and a second bevel gear 5 respectively, the first bevel gear 4 is fixedly connected to one end of a first lead screw 6, the second bevel gear 5 is fixedly connected to one end of a second lead screw 7, the other end of the first lead screw 6 and the other end of the second lead screw 7 are both screwed to a slider 8, and the thread rotation directions of the first lead screw 6 and the second lead screw 7 are opposite, the slider 8 is also fixedly connected to an inner support seat 9, and the surface of the inner support seat 9 is provided with an outer cylinder bottom groove 10.

[0023] By adopting the technical solution of the present invention, when a torque is applied to the rotating shaft, since the threads of the first screw and the second screw rotate in opposite directions, the corresponding sliders move away from each other until the bottom groove of the outer cylinder on the surface of the inner support seat tightens the lower end surface and the inner wall surface of the workpiece. When the outer peripheral surface of the workpiece is cut, the tightening effect of the inner support seat on the workpiece increases the rigidity of the workpiece, thereby reducing the deformation of the workpiece and improving the cutting accuracy of the workpiece. In addition, in the process of making the inner support seat tighten both sides of the outer cylinder of the workpiece at the same time, since the first screw and the second screw can keep rotating synchronously, the tightening force of the inner support seat on the left and right sides of the workpiece remains consistent, which can effectively improve the symmetry of the workpiece and improve the symmetry of the workpiece.

[0024] Specifically, the outer cylinder bottom groove 10 is L-shaped as a whole. The surface of the base 1 is also provided with a guide groove 11, and the slider 8 is sleeved in the guide groove 11. The guide groove 11 is used to guide the movement of the slider, so that the inner support seat can maintain the tightening effect on both sides of the workpiece outer cylinder synchronously, and the tightening force directions are opposite.

[0025] In addition, the base 1 is also fixedly connected to the lower end of the positioning cylinder 12, the active bevel gear 3, the first bevel gear 4 and the second bevel gear 5 are all contained in the positioning cylinder 12, the upper end of the positioning cylinder 12 is fixedly connected to the cover plate 13, the cover plate 13 is also fixedly connected to the lower end of the column screw 14, the upper end of the column screw 14 is screwed to the locking block 15, the column screw 14 also passes through the pressure plate 16, and the surface of the pressure plate 16 is provided with an outer cylinder end groove 17. The pressure plate 16 is also fixedly connected to the inner support sleeve 18, and the outer diameter of the inner support sleeve 18 is consistent with the inner diameter of the inner cylinder of the workpiece 21. The outer diameter of the positioning cylinder 12 is consistent with the inner diameter of the inner cylinder of the workpiece 21. By adopting the technical solution of the present invention, the positioning cylinder 12 further supports the inner cylinder of the workpiece, and during the cutting process, the cutting force can be transmitted to the positioning cylinder via the outer cylinder and the inner cylinder of the workpiece, so that the positioning cylinder shares the cutting force, effectively improves the distribution of the force state of the workpiece, improves the rigidity of the workpiece, reduces the deformation of the workpiece, and improves the cutting accuracy of the workpiece.

[0026] In addition, the locking block 15 is a hexagonal nut. The outer cylinder end groove 17 is L-shaped as a whole. The rotating shaft 2 is also coaxially connected to the hand wheel 19, and the base 1 is also connected to a plurality of legs 20. The outer peripheral surface of the hand wheel 19 is provided with straight knurling.

Claims

1. A coaxial cylindrical shell workpiece outer surface cutting fixture, characterized in that: The invention comprises a base (1) and a rotating shaft (2), wherein the rotating shaft (2) is mounted on the base (1) by means of a rolling bearing, the rotating shaft (2) is also coaxially fixedly connected to an active bevel gear (3), the active bevel gear (3) is meshed with a first bevel gear (4) and a second bevel gear (5) respectively, the first bevel gear (4) is fixedly connected to one end of a first lead screw (6), the second bevel gear (5) is fixedly connected to one end of a second lead screw (7), the other end of the first lead screw (6) and the other end of the second lead screw (7) are both screwed to a slider (8), and the first lead screw (6) and the second lead screw (7) have opposite screw rotation directions, the slider (8) is also fixedly connected to an inner support seat (9), and the surface of the inner support seat (9) is provided with an outer cylinder bottom groove (10).

2. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 1, characterized in that: The outer cylinder bottom groove (10) is L-shaped as a whole.

3. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 1, characterized in that: The surface of the base (1) is also provided with a guide groove (11), and the sliding block (8) is sleeved in the guide groove (11).

4. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 1, characterized in that: The base (1) is also fixedly connected to the lower end of the positioning cylinder (12); the active bevel gear (3), the first bevel gear (4) and the second bevel gear (5) are all accommodated in the positioning cylinder (12); the upper end of the positioning cylinder (12) is fixedly connected to the cover plate (13); the cover plate (13) is also fixedly connected to the lower end of the column screw (14); the upper end of the column screw (14) is screwed to the locking block (15); the column screw (14) also passes through the pressure plate (16); and the surface of the pressure plate (16) is provided with an outer cylinder end groove (17).

5. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 4, characterized in that: The pressing plate (16) is also fixedly connected to the inner support sleeve (18), and the outer diameter of the inner support sleeve (18) is consistent with the inner diameter of the inner cylinder of the workpiece (21).

6. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 4, characterized in that: The outer diameter of the positioning cylinder (12) is consistent with the inner diameter of the inner cylinder of the workpiece (21).

7. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 4, characterized in that: The locking block (15) is a hexagonal nut.

8. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 4, characterized in that: The outer cylinder end groove (17) is L-shaped as a whole.

9. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 1, characterized in that: The rotating shaft (2) is also coaxially connected to the hand wheel (19), and the base (1) is also fixedly connected to a plurality of supporting legs (20).

10. The coaxial cylindrical shell workpiece outer surface cutting fixture as claimed in claim 9, characterized in that: The outer peripheral surface of the hand wheel (19) is provided with straight knurling.

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