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Mandrel component

A shaft component and mandrel technology, applied in the field of mandrel components, can solve problems such as difficult hollowing, high-precision positioning, difficult disassembly, inconvenient use, etc., and achieve the effect of precise axial positioning

Active Publication Date: 2015-08-12
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cylindrical mandrel has low positioning accuracy, and the taper mandrel requires a smaller taper to improve the accuracy, resulting in a large mandrel size and inconvenient use
[0003] There is also a problem in the existing mandrel, which is that it is difficult to disassemble after pressing
When it is necessary to put a camera in the workpiece hole for visual servo control, the mandrel is required to be hollow, and the existing mandrel is difficult to ensure hollowness and high-precision positioning at the same time

Method used

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Embodiment Construction

[0049] The mandrel assembly according to the present invention will be described in detail below with reference to the accompanying drawings.

[0050] refer to Figure 1 to Figure 10 , the spindle assembly according to the present invention includes a spindle body 1 , an operating rod 2 , an outer sleeve 3 , a positioning sleeve 4 and a dismounting sleeve 5 .

[0051] The mandrel body 1 is used to be placed in the workpiece hole, and includes a mandrel 11 , a movable core sleeve 12 , a plurality of centering expansion blocks 13 , an elastic ring 14 , two stopper pins 15 and a push-pull sleeve 16 . The mandrel 11 is a cylindrical body and a plurality of through grooves 1111 uniformly distributed along the circumferential direction are formed on the peripheral wall 111 . The movable core sleeve 12 is in the form of a cylinder and is sheathed in the mandrel 11 so that it can move axially. It has: an outer wall surface 121; wedge-shaped grooves 122 are arranged on the outer wall ...

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Abstract

The invention provides a mandrel component; the mandrel component comprises a mandrel body, an operating rod, an outer sleeve, a positioning sleeve and a dismounting sleeve; the mandrel body is placed in a workpiece hole and comprises a mandrel, a movable core sleeve, a plurality of centering expanding-tightening blocks, an elastic ring, two stop pins and a push-pull sleeve; the operating rod is arranged in the push-pull sleeve in a penetrating manner and is provided with a convex part at the front end; the outer sleeve is arranged on the operating rod in a sleeving manner; the positioning sleeve is of a cylinder and is arranged on the operating rod in the sleeving manner; the dismounting sleeve is of a cylinder and is arranged on the operating rod in the sleeving manner; the rear end of the dismounting sleeve is jointed with the front end of the outer sleeve, so that the dismounting sleeve can rotate by being driven by the outer sleeve when the outer sleeve rotates; the dismounting sleeve is provided with two wedge blocks located at the front end, being wedge-shaped, extending circumferentially and being spaced; the narrow end of one wedge block is adjacent to the wide end of the other wedge block; each of the wedge blocks, along the axial front surface or the axial rear surface, contacts the corresponding stop pin. Therefore, the mandrel component when being installed can be positioned accurately and axially, and the inner wall of the workpiece hole is not damaged in dismounting process.

Description

technical field [0001] The invention relates to a mandrel positioning instrument, in particular to a mandrel assembly. Background technique [0002] In the mechanical field, the positioning of the mandrel is often used, and the mandrel has various forms such as a cylindrical mandrel and a tapered mandrel. The existing cylindrical mandrel has low positioning accuracy, and the taper mandrel requires a smaller taper to improve the accuracy, resulting in a large mandrel volume and inconvenient use. [0003] There is also a problem in the existing mandrel, which is that it is difficult to disassemble after pressing. When it is necessary to put a camera in the workpiece hole for visual servo control, the mandrel is required to be hollow, and the existing mandrel is difficult to ensure hollowness and high-precision positioning at the same time. Contents of the invention [0004] In view of the problems existing in the background technology, the purpose of the present invention ...

Claims

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Application Information

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IPC IPC(8): B23B31/40
CPCB23B31/4033
Inventor 徐静万安陈恳谢颖刘志
Owner TSINGHUA UNIV
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