Constant velocity joint part turning tool

Abstract

A constant velocity joint part turning tool comprises a mandrel, a clamp body is installed on the outer surface of the mandrel, the left side of the clamp body is connected with an installation flange, the left side of the installation flange is connected with a machine tool, and an end cover is installed on the right side of the clamp body. An elastic tapered wedge seat is installed in an installation notch in the right side of the outer surface of the mandrel, a belleville spring is arranged on the left side of the elastic tapered wedge seat, the left end of the belleville spring abuts against the mandrel, the right end of the belleville spring abuts against the elastic tapered wedge seat, a fixed tapered wedge seat is fixedly installed on the right end face of the mandrel, and inclined face grooves are formed in the outer side faces of the elastic tapered wedge seat and the fixed tapered wedge seat. A through hole is formed in the outer side face of the clamp body, and the tensioning block penetrates through the through hole. The tensioning device overcomes the defects in the prior art, and can be supported in an inner hole of a workpiece outwards and inwards through the tensioning block, so that supporting force in the radial direction is provided for the workpiece. And the workpiece can be stably positioned and uniformly stressed in the turning process, so that the phenomena of unstable part size and the like in the turning process are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a turning tool for constant velocity joint parts. Background Art

[0002] Constant velocity joints are widely used in automobiles. They are important components in the car transmission system, and their function is to transfer the engine power from the transmission to the drive wheels to drive the car at high speed.

[0003] When parts are turned on the outside, they are usually fixed and clamped manually. Manual clamping is dangerous and may cause injuries to the workers' hands and unstable clamping. Alternatively, they are clamped and fixed by a fixture. However, the current fixture only clamps the front and rear ends of the workpiece without restricting the circumferential end face of the workpiece. Since there is a gap between the inner hole of the workpiece and the fixture, the turning stress is large, so burrs, tears and deformation are easily generated, which in turn increases the defective rate of the product. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a constant velocity joint part turning tool, which overcomes the shortcomings of the prior art and can support the inner hole of the workpiece outward through the tension block, thereby providing radial support force for the workpiece. The workpiece can be positioned stably and evenly stressed during turning, thereby avoiding the phenomenon of unstable part size during turning.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A tool for turning a constant velocity joint part, comprising a mandrel, the mandrel being matched and connected with a main shaft tie rod of a machine tool, a clamping body being installed on the outer surface of the mandrel, the left side of the clamping body being connected with a mounting flange through a first bolt, the left side of the mounting flange being connected with the machine tool, and an end cover being installed on the right side of the clamping body;

[0007] An installation slot is provided on the right side of the outer surface of the core shaft, an elastic wedge seat is installed in the installation slot, a disc spring is provided on the left side of the elastic wedge seat, the left end of the disc spring is against the core shaft, and the right end of the disc spring is against the elastic wedge seat, a fixed wedge seat is fixedly installed on the right end surface of the core shaft by a second bolt, and the outer sides of the elastic wedge seat and the fixed wedge seat are both provided with inclined grooves, a tensioning block is installed on the inclined groove, a through hole is provided on the outer side of the clamp body, and the tensioning block passes through the through hole.

[0008] Preferably, a sliding shaft is installed on the left side of the clamp body, an annular protrusion is provided on the surface of the core shaft, a positioning hole is opened on the surface of the annular protrusion along the axial direction of the core shaft, and the sliding shaft is slidably connected in the positioning hole.

[0009] Preferably, the right end surface of the clamp body and the left end surface of the end cover are both provided with corresponding positioning holes, and positioning pins are installed in the positioning holes.

[0010] Preferably, a positioning head is provided on the right end surface of the end cover.

[0011] Preferably, a conical stop is provided on the left side of the mounting flange, the conical stop matches the conical surface of the spindle of the machine tool, fixing bolts are installed on the mounting flange, and the mounting flange is fixedly mounted on the spindle of the machine tool by the fixing bolts.

[0012] The utility model provides a tooling for turning parts of constant velocity joints. It has the following beneficial effects: the spindle pull rod of the machine tool drives the core shaft to move to the right in the axial direction, so as to drive the fixed bevel seat and the elastic bevel seat to move to the right, and the tension block is limited by the position of the through hole in the axial direction of the core shaft, so when the elastic bevel seat and the fixed bevel seat move to the right, the two tension blocks move along the bevel grooves on the sides of the elastic bevel seat and the fixed bevel seat respectively, and then the bevel guiding effect of the bevel groove allows the tension block to move to the outside of the through hole, so that the tension block can be supported outwardly in the inner hole of the workpiece, thereby providing radial support force for the workpiece. The workpiece can be positioned stably and evenly stressed during turning, thereby avoiding the phenomenon of unstable part size during turning, thereby effectively improving the processing accuracy and greatly improving the yield rate and work efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings required for describing the prior art are briefly introduced below.

[0014] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Description of the numbers in the figure:

[0018] 1. Mandrel; 2. Clamp body; 3. First bolt; 5. End cover; 6. Mounting flange; 7. Elastic wedge seat; 8. Disc spring; 9. Second bolt; 10. Fixed wedge seat; 11. Inclined groove; 12. Tensioner; 13. Through hole; 14. Sliding shaft; 15. Annular protrusion; 16. Locating pin; 17. Locating head; 18. Conical stop; 19. Fixing bolt. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention.

[0020] Embodiment 1, as Figures 1 to 3 As shown, a constant velocity joint part turning tool comprises a mandrel 1, the mandrel 1 is matched and connected with the main shaft tie rod of the machine tool, a clamp body 2 is installed on the outer surface of the mandrel 1, the left side of the clamp body 2 is connected with the mounting flange 6 through a first bolt 3, the left side of the mounting flange 6 is connected with the machine tool, and an end cover 5 is installed on the right side of the clamp body 2;

[0021] A mounting notch is provided on the right side of the outer surface of the core shaft 1, and an elastic inclined wedge seat 7 is installed in the mounting notch. A disc spring 8 is provided on the left side of the elastic inclined wedge seat 7. The left end of the disc spring 8 abuts against the core shaft 1, and the right end of the disc spring 8 abuts against the elastic inclined wedge seat 7. A fixed inclined wedge seat 10 is fixedly installed on the right end surface of the core shaft 1 by a second bolt 9. The outer sides of the elastic inclined wedge seat 7 and the fixed inclined wedge seat 10 are both provided with inclined grooves 11, and a tensioning block 12 is installed on the inclined groove 11. A through hole 13 is provided on the outer side of the clamp body 2, and the tensioning block 12 passes through the through hole 13.

[0022] Working principle:

[0023] When in use, first connect the entire turning tool to the machine tool spindle; then drive the core shaft 1 to move rightward in the axial direction through the spindle pull rod of the machine tool to drive the fixed bevel seat 10 to move rightward, and drive the elastic bevel seat 7 to move rightward by squeezing the disc spring 8, and the tension block 12 is limited by the position of the through hole 13 in the axial direction of the core shaft 1, so when the elastic bevel seat 7 and the fixed bevel seat 10 move to the right, the two tension blocks 12 move along the bevel groove 11 on the side of the elastic bevel seat 7 and the fixed bevel seat 10 respectively, and then the bevel guiding effect of the bevel groove 11 makes the tension block 12 move to the outside of the through hole 13, so that the tension block 12 can be supported outward in the inner hole of the workpiece, so as to provide radial support force for the workpiece. The workpiece can be subjected to uniform force during turning, and then the instability of the part size during turning is avoided, thereby effectively improving the processing accuracy and greatly improving the yield rate and work efficiency of the workpiece. After use, the main shaft tie rod of the machine tool is directly loosened, and the core shaft 1 can directly rebound and reset through the elastic effect of the disc spring 8.

[0024] Embodiment 2, as a further preferred solution of embodiment 1, a sliding shaft 14 is installed on the left side of the clamp body 2, an annular protrusion 15 is provided on the surface of the mandrel 1, a positioning hole is opened on the surface of the annular protrusion 15 along the axial direction of the mandrel 1, and the sliding shaft 14 is slidably connected in the positioning hole. When the spindle pull rod of the machine tool drives the mandrel 1 to move in the axial direction, the sliding connection of the sliding shaft 14 in the positioning hole can achieve the guiding movement of the mandrel 1, thereby avoiding the angular deviation of the mandrel 1 during the axial movement.

[0025] Embodiment 3, as a further preferred solution of embodiment 1, the right end surface of the clamp body 2 and the left end surface of the end cover 5 are both provided with corresponding positioning holes, and positioning pins 16 are installed in the positioning holes. Therefore, when the end cover 5 is installed, the positioning pins 16 can be used to achieve a quick positioning effect of the end cover 5 and the clamp body 2, thereby improving the efficiency of installation.

[0026] Embodiment 4, as a further preferred embodiment of embodiment 1, a positioning head 17 is provided on the right end face of the end cover 5. When the part is clamped on the turning tool, the tailstock ejector of the machine tool presses against the center hole of the small end face of the part, so that the positioning head 17 cooperates with the arc end face of the positioning groove in the inner hole of the workpiece to achieve the positioning effect of the workpiece.

[0027] Embodiment 5, as a further preferred solution of embodiment 1, a conical stop 18 is provided on the left side of the mounting flange 6, the conical stop 18 matches with the conical surface of the spindle of the machine tool, a fixing bolt 19 is installed on the mounting flange 6, and the mounting flange 6 is fixedly mounted on the spindle of the machine tool by the fixing bolt 19. By matching the conical stop 18 with the conical surface of the spindle of the machine tool, the position of the mounting flange 6 can be limited to avoid position displacement of the mounting flange 6 during use.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool for turning constant velocity joint parts, characterized in that: The invention comprises a core shaft (1), the core shaft (1) is matched and connected with the main shaft pull rod of the machine tool, a clamp body (2) is installed on the outer surface of the core shaft (1), the left side of the clamp body (2) is connected with the mounting flange (6) through a first bolt (3), the left side of the mounting flange (6) is connected with the machine tool, and an end cover (5) is installed on the right side of the clamp body (2); The outer surface of the core shaft (1) is provided with a mounting notch on the right side, an elastic wedge seat (7) is installed in the mounting notch, a disc spring (8) is provided on the left side of the elastic wedge seat (7), the left end of the disc spring (8) is against the core shaft (1), and the right end of the disc spring (8) is against the elastic wedge seat (7), and the right end of the disc spring (8) is fixedly installed with a fixed wedge seat (10) on the right end surface of the core shaft (1) through a second bolt (9), and the outer side surfaces of the elastic wedge seat (7) and the fixed wedge seat (10) are both provided with an inclined groove (11), and a tensioning block (12) is installed on the inclined groove (11), and a through hole (13) is provided on the outer side surface of the clamp body (2), and the tensioning block (12) passes through the through hole (13).

2. A constant velocity joint part turning tool according to claim 1, characterized in that: A sliding shaft (14) is installed on the left side of the clamp body (2), an annular protrusion (15) is provided on the surface of the core shaft (1), a positioning hole is opened on the surface of the annular protrusion (15) along the axial direction of the core shaft (1), and the sliding shaft (14) is slidably connected in the positioning hole.

3. A constant velocity joint part turning tool according to claim 1, characterized in that: The right end surface of the clamp body (2) and the left end surface of the end cover (5) are both provided with corresponding positioning holes, and positioning pins (16) are installed in the positioning holes.

4. A constant velocity joint part turning tool according to claim 1, characterized in that: The right end surface of the end cover (5) is provided with a positioning head (17).

5. A constant velocity joint part turning tool according to claim 1, characterized in that: The left side of the mounting flange (6) is provided with a conical stop (18), and the conical stop (18) matches with the conical surface of the main shaft of the machine tool. The mounting flange (6) is installed with a fixing bolt (19), and the mounting flange (6) is fixedly mounted on the main shaft of the machine tool by the fixing bolt (19).

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