Matching device for guaranteeing turning precision of sleeve parts

Abstract

The utility model relates to a matching device for guaranteeing the turning precision of sleeve parts, and belongs to the technical field of machine tool machining matching equipment. According to the structure, three chuck soft claws of a chuck are each provided with a fan-shaped clamping claw, the fan-shaped clamping claws clamp a workpiece, and the height of the clamping positioning face of each fan-shaped clamping claw is larger than the thickness of the workpiece; a cutter head is arranged outside the workpiece, a turning tool is connected to a turning tool holder of the cutter head, the turning tool and the turning tool holder are positioned in an L shape, the length of the turning tool holder is larger than the thickness of the workpiece, and the distance between the inner end face of the workpiece and the adjacent end face of the fan-shaped clamping jaw is larger than the height of a tool bit of the turning tool. According to the matching device, one-time clamping can be achieved, all procedures of the back end face and the inner stepped hole are completed, the workpiece machining precision is guaranteed, and the machining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a matching device for ensuring double-axis radial turning precision, belonging to the technical field of matching equipment for machine tool processing. Background Art

[0002] Since sleeve-type parts have high requirements for the coaxiality of the stepped inner hole and the end face runout of the front and back end faces relative to the axis, in the traditional lathe processing of sleeve-type parts, the stepped inner hole of the workpiece is generally processed with a boring tool, and the end face is processed with a turning tool. However, the back end face of the sleeve-type parts often cannot be machined in one go and needs to be turned over at least once for processing. The high precision of the coaxiality of the stepped inner hole of the workpiece and the runout of the front and back end faces cannot be guaranteed. Precision has a vital impact on the quality and performance of parts. However, traditional turning methods and devices cannot be machined in one go, and often have shortcomings in ensuring high precision of coaxiality and end face runout. They are prone to problems such as form and position tolerance deviation and substandard surface roughness, which affect the product's qualification rate and performance. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a matching device for ensuring the turning accuracy of sleeve-type parts. The matching device can realize one-time clamping and complete all processes of the back end face and the inner stepped hole, which not only ensures the workpiece processing accuracy but also improves the processing efficiency.

[0004] In order to solve the above problems, the specific technical solution of the utility model is as follows: a supporting device for ensuring the turning accuracy of sleeve-type parts, wherein fan-shaped claws are respectively provided on the three chuck soft jaws of the chuck, the fan-shaped claws clamp the workpiece, and the clamping positioning surface height of the fan-shaped claws is greater than the thickness of the workpiece; a cutter disc is provided on the outside of the workpiece, and a turning tool is connected to the turning tool holder of the cutter disc, and the turning tool and the turning tool holder are positioned in an L shape. The length of the turning tool holder is greater than the thickness of the workpiece, and the distance between the inner end face of the workpiece and the adjacent end face of the fan-shaped claws is greater than the height of the turning tool head.

[0005] The fan-shaped clamping jaws include a positioning portion and a clamping portion. The surface of the positioning portion is provided with a countersunk hole, and the bolts in the countersunk hole are connected to the clamping jaw base of the chuck. The clamping portion is arc-shaped, and its inner surface imitates the outer circumference of the workpiece and clamps and positions it.

[0006] The outer end surface of the positioning portion is provided with a positioning groove, and the sector-shaped clamping claw is limited by the positioning groove and the chuck soft claw.

[0007] The cutting edge of the turning tool processes the back end surface and the coaxial stepped hole of the workpiece.

[0008] The outer end portion of the clamping portion is provided with a stepped limiting platform.

[0009] The supporting device of the present application for ensuring the turning accuracy of sleeve-type parts adopts a fan-shaped clamping jaw whose length is greater than the height of the workpiece, so that the processing of the back end face and the inner stepped hole of the workpiece can be completed in one clamping, thereby improving the processing efficiency and processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 A three-dimensional diagram of the supporting device for ensuring the radial turning accuracy of disc-type parts.

[0011] Figure 2 for Figure 1 A partial enlarged view of point A.

[0012] Figure 3 Schematic diagram of the connection between the back of the fan-shaped jaw and the soft jaw of the chuck.

[0013] Figure 4 This is the connection structure diagram between the cutter head and the turning tool.

[0014] Figure 5 Machining the reverse end face section for turning tools. DETAILED DESCRIPTION

[0015] like Figures 1 to 5 As shown, a supporting device for ensuring the turning accuracy of sleeve-type parts is provided. Sector-shaped claws 2 are respectively provided on the three chuck soft jaws 1-1 of the chuck 1. The sector-shaped claws 2 clamp the workpiece 5, and the clamping height of the sector-shaped claws 2 is greater than the thickness of the workpiece 5; a cutter disc 7 is provided on the outside of the workpiece 5, and a turning tool 3 is connected to the turning tool holder 6 of the cutter disc 7. The turning tool 3 and the turning tool holder 6 are positioned in an L shape and are perpendicular to the positioning surface of the cutter disc 7. The distance between the inner end face of the workpiece 5 and the adjacent end face of the sector-shaped claws 2 is greater than the height of the tool head of the turning tool 3, thereby leaving space for the turning tool 3 to turn the inner end face of the workpiece.

[0016] like Figure 2 and Figure 3 As shown, the sector-shaped jaw 2 includes a positioning portion 2-1 and a clamping portion 2-2. A countersunk hole is provided on one side of the positioning portion 2-1, and a positioning groove 2-4 is provided on the other side. The sector-shaped jaw 2 is limited by the positioning groove 2-4 and the chuck soft jaw 1-1, and then connected to the chuck soft jaw 1-1 by a bolt provided in the countersunk hole, thereby ensuring the positioning accuracy of the sector-shaped jaw 2; the clamping portion 2-2 is arc-shaped, and its inner surface imitates the outer circumference of the workpiece, and clamps and positions the workpiece.

[0017] The outer end of the clamping portion 2-2 is provided with a stepped limit platform 2-3, which can cooperate with the boss on the outer circumference of the workpiece 5 to limit the axial position of the workpiece 5 and increase the clamping area of ​​the workpiece.

[0018] The cutting edge of the turning tool 3 processes the inner end surface and the coaxial stepped hole of the workpiece 5, so it is necessary to select a turning tool with a side edge and a front edge.

[0019] The working process of the supporting device for ensuring the turning accuracy of sleeve-type parts in the present application is: by controlling the opening of the jaw base of the chuck 1, the fan-shaped jaw 2 is driven to open, and the workpiece 5 is placed in the fan-shaped jaw 2, and the chuck 1 is started again to coaxially clamp the workpiece 5 in the fan-shaped jaw 2; when the outer circumference of the workpiece has a boss, the boss and the step limit platform 2-3 are limited; during processing, the chuck 1 is driven to rotate by the main shaft, and the feed shaft controls the turning tool 3 to perform turning through the cutter disc 7 and the turning tool holder 6. At the same time, since there is a certain space between the inner end face of the workpiece and the positioning part 2-1 of the arc-shaped chuck, the turning tool 3 can not only turn the inner step hole of the workpiece 5, but also complete the processing of the back end face of the workpiece 5 at the same time.

Claims

1. A supporting device for ensuring the turning accuracy of sleeve-type parts, characterized by: Sector-shaped clamping jaws (2) are respectively provided on three chuck soft jaws (1-1) of the chuck (1), the sector-shaped clamping jaws (2) clamp the workpiece (5), and the height of the clamping positioning surface of the sector-shaped clamping jaws (2) is greater than the thickness of the workpiece (5); a cutter head (7) is provided on the outside of the workpiece (5), and a turning tool holder (6) of the cutter head (7) is connected to the turning tool (3), and the turning tool (3) and the turning tool holder (6) are positioned in an L shape, the length of the turning tool holder (6) is greater than the thickness of the workpiece, and the distance between the inner end face of the workpiece (5) and the adjacent end face of the sector-shaped clamping jaws (2) is greater than the height of the tool head of the turning tool (3).

2. The supporting device for ensuring the turning accuracy of sleeve-type parts according to claim 1 is characterized in that: The sector-shaped clamping jaw (2) comprises a positioning portion (2-1) and a clamping portion (2-2); a countersunk hole is provided on the surface of the positioning portion (2-1); a bolt in the countersunk hole is connected to the clamping jaw base of the chuck (1); and the clamping portion (2-2) is arc-shaped, and its inner surface is contoured to the outer circumference of the workpiece, and clamps and positions the workpiece.

3. The supporting device for ensuring the turning accuracy of sleeve-type parts according to claim 2, characterized in that: The outer end surface of the positioning portion (2-1) is provided with a positioning groove (2-4), and the sector-shaped clamping claw (2) is limited by the positioning groove (2-4) and the chuck soft claw (1-1).

4. The supporting device for ensuring turning accuracy of sleeve-type parts according to claim 2, characterized in that: The cutting edge of the turning tool (3) processes the back end surface and the coaxial stepped hole of the workpiece (5).

5. The supporting device for ensuring turning accuracy of sleeve-type parts according to claim 2, characterized in that: The outer end portion of the clamping portion (2-2) is provided with a stepped limiting platform (2-3).

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