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Axial precision positioner of a spring chuck

A spring collet and locator technology, which is applied in the direction of positioning device, clamping, support, etc., can solve the problems of complex axial positioning structure, low positioning accuracy, insufficient rigidity, etc., achieve simple structure and solve the problem of axial positioning difference. , high-strength effect

Inactive Publication Date: 2015-03-04
西安鸣士数控机床有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a spring collet axial precision positioner, which solves the defects of the existing spring collet axial positioning structure complex, insufficient rigidity and low positioning accuracy

Method used

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  • Axial precision positioner of a spring chuck
  • Axial precision positioner of a spring chuck
  • Axial precision positioner of a spring chuck

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: as figure 1 As shown, the inner edge of the snap ring 1 is evenly provided with a three-lobed stopper 2, the stopper 2 is a right-angled trapezoid, the hypotenuse of the stopper 2 is connected to the inner edge of the snap ring 1, the right-angled side faces the center of the snap ring 1 and Parallel to the axis of the snap ring 1, the outer edge of the snap ring 1 is provided with bolt mounting holes for installation with screws. This structure is suitable for positioning the step shaft workpiece, and the workpiece steps are used as the positioning surface during positioning.

Embodiment 2

[0022] Embodiment 2: The inner edge of the snap ring 1 is evenly provided with three-lobed limit pieces 2, the contact part between the limit piece 2 and the workpiece has a step structure, and the three step structures form a positioning surface, and the outer edge of the snap ring 1 is also provided with bolts for installation The holes are installed with screws. This structure is suitable for positioning common workpieces, and the end face of the workpiece is used as the positioning surface during positioning.

Embodiment 3

[0023] Embodiment 3: The inner edge of the snap ring 1 is provided with three spacer ribs 3 connected to each other at the center, the structural strength can be improved by using the spacer ribs 3 connected together, and the three spacer ribs 3 can be provided with a step structure and connected together The stepped structure forms a positioning surface, and the central connection of the three limiting ribs 3 is recessed inward to reduce the contact area with the tool to improve positioning accuracy. The outer edge of the snap ring 1 is provided with bolt mounting holes and is installed with screws. This structure The form is suitable for positioning ordinary workpieces, and the end face of the workpiece is used as the positioning surface during positioning.

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Abstract

The invention discloses an axial precision positioner of a spring chuck. The axial precision positioner comprises a clamping ring; a plurality of limiting pieces or limiting ribs are arranged along the inner edge of the clamping ring; and the number and shape of the limiting pieces or the limiting ribs are matched with the number and shape of groove openings of the spring chuck. Compared with the manner that in the prior art, the end faces or step holes of the spring chuck are utilized for positioning, or a long rod stretches into the rear portion of a main shaft through a hole in the middle of a pull rod to be used for positioning, the axial precision positioner is simple in structure, high in strength, and meanwhile quite accurate in positioning and effectively overcomes the technical defect that axial positioning of the spring chuck is poor.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing equipment and relates to an axial precision positioner for a collet. Background technique [0002] Instrument lathes, CNC lathes for processing small parts, and small row tool machine tools, etc., these machine tools generally use spring collets for clamping parts. Spring collets have high radial positioning accuracy, simple structure, low cost, small size, and clamping Advantages such as fast speed. [0003] However, after the parts are clamped by the spring collet, the change of the axial position relative to the main shaft is related to the diameter of the parts. For example, for a collet with a taper of 30°, the change in the axial position relative to the main shaft is 1.9 times the change in diameter, and for a collet with a taper of less than 30°, the axial change is greater with the same diameter change. Therefore, only using the end face or step hole of the collet itself t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/12
CPCB23Q3/12
Inventor 王云富范文豹杨冰杨莉
Owner 西安鸣士数控机床有限公司