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Self-centering clamp for inner hole machining

A technology of self-centering fixtures and inner holes, which is applied in the direction of grinding workpiece supports, etc., can solve the problems of high labor intensity for operators, difficulty in grinding small inner holes, and difficulty in quality assurance, so as to save time when disassembling workpieces Labor-saving, high processing efficiency, high-precision positioning effect

Active Publication Date: 2021-03-16
ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of mechanical processing, especially the inner hole processing of CNC inserts, due to the small hole size and high requirements for dimensional accuracy and shape accuracy of inner hole processing, grinding is required to meet the design requirements, and the size and shape of CNC products are different. , the general inner hole grinding jig is difficult to calibrate the position of the hole center at the beginning of processing, the universality of the jig is not strong, the adjustment of the jig is time-consuming and labor-intensive, and the labor intensity of the operator is high
The difficulty of clamping the workpiece restricts the production efficiency. The repeat positioning accuracy of the product is not high during mass production, resulting in unstable product size and difficult to guarantee the quality. In summary, it is difficult to grind the small inner hole.

Method used

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  • Self-centering clamp for inner hole machining
  • Self-centering clamp for inner hole machining
  • Self-centering clamp for inner hole machining

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Such as Figure 1 to Figure 5 As shown, the self-centering fixture for inner hole processing in this embodiment includes a connecting shaft, a positioning seat 3 and a pressure block 4. The connecting shaft includes a coaxially arranged handle 1 and a positioning mandrel 2. The handle 1 is used for connecting with the machine tool connection, the diameter of the shank 1 is larger than the diameter of the positioning mandrel 2, and one end of the positioning seat 3 is provided with an avoidance hole 31, and the other end is provided with a mounting groove 6 for mounting the workpiece 5, and the mounting groove 6 includes a V-shaped positioning part that can be connected to the workpiece 5 51 is in contact with the V-shaped positioning surface 61, and the V-shaped positioning surface 61 extends into the avoidance hole 31. The positioning mandrel 2 is penetrated in the avoidance hole 31 and is in contact with the V-shaped positioning surface 61. The positioning mandrel 2 an...

Embodiment 2

[0041] Such as Figure 6 to Figure 8 As shown, the difference between the inner hole processing self-centering fixture of this embodiment and Embodiment 1 is:

[0042] In this embodiment, the V-shaped positioning surface 61 includes a first side positioning surface 611 and a second side positioning surface 612, the distance between the central hole 52 of the workpiece 5 and the first side positioning surface 611 is L1, and the central hole 52 of the workpiece 5 The distance between the second side positioning surface 612 is L2, L1≠L2, the distance between the positioning mandrel 2 and the first side positioning surface 611 is R1, and the distance between the positioning mandrel 2 and the second side positioning surface 612 is R2, R1≠R2, R1=L1, R2=L2, in order to improve the versatility of the fixture, the distance between the central hole 52 and the V-shaped positioning surface 61 is not equal, and the positioning mandrel 2 should be a coaxial stepped outer circular surface, t...

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PUM

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Abstract

The invention discloses a self-centering clamp for inner hole machining. The self-centering clamp comprises a connecting shaft, a positioning base and a pressing block, wherein the connecting shaft comprises a handle part and a positioning mandrel which are coaxially arranged, the handle part is used for being connected with a machine tool, the diameter of the handle part is larger than that of the positioning mandrel, a receding hole is formed in one end of the positioning base, and a mounting groove used for mounting a workpiece is formed in the other end of the positioning base; the mounting groove comprises a V-shaped positioning face capable of being in contact fit with a V-shaped positioning part of the workpiece, the V-shaped positioning face extends into the receding hole, the positioning mandrel is arranged in the receding hole in a penetrating mode and is in contact fit with the V-shaped positioning face, the positioning mandrel and the positioning base are locked through a locking piece, and a pressing groove is formed in the positioning base; and the pressing block is arranged in the pressing groove and used for pressing the workpiece in the mounting groove, the pressing block is locked on the positioning base through a fastener, and the distance between a center hole of the workpiece and the V-shaped positioning face is equal to the distance between the positioningmandrel and the V-shaped positioning face. The self-centering clamp has the advantages of being high in centering precision, convenient to operate, reliable in clamping, time-saving and labor-savingin workpiece dismounting and high in machining efficiency.

Description

technical field [0001] The invention relates to the field of mechanical processing, in particular to a self-centering fixture for inner hole processing. Background technique [0002] In the field of mechanical processing, especially the inner hole processing of CNC inserts, due to the small hole size and high requirements for dimensional accuracy and shape accuracy of inner hole processing, grinding is required to meet the design requirements, and the size and shape of CNC products are different. , the general inner hole grinding jig is difficult to calibrate the center of the hole at the beginning of processing, the universality of the jig is not strong, the adjustment of the jig is time-consuming and labor-intensive, and the labor intensity of the operator is high. The difficulty of clamping the workpiece restricts the production efficiency. The repeat positioning accuracy of the product is not high during mass production, resulting in unstable product size and difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B41/06
CPCB24B41/06
Inventor 储永代张京刘天
Owner ZHUZHOU CEMENTED CARBIDE CUTTING TOOLS CO LTD