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A floating expansion mandrel

A technology for expanding mandrels and central shafts, applied in the field of machining, to avoid workpiece clamping deformation, eliminate manufacturing errors, and eliminate the multi-point floating function.

Active Publication Date: 2021-04-30
LANDING GEAR ADVANCED MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies of the prior art, the present invention aims to provide a floating expansion mandrel, which can eliminate fixture manufacturing errors, solve the positioning reference problem during part processing, and can also be adapted to special-shaped parts and thinner wall thicknesses parts

Method used

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  • A floating expansion mandrel
  • A floating expansion mandrel
  • A floating expansion mandrel

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Embodiment Construction

[0042] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. For the convenience of description, if the words "up", "down", "left" and "right" appear in the following, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

[0043] A floating expansion mandrel such as figure 2 As shown, it includes a positioning base 1 and a stepped central axis 2, the positioning base 1 is a cylinder with a stepped central axis hole along the central axis direction, the stepped central axis 2 is located in the stepped central axis hole, and Cooperate with the small-diameter hole section of the stepped center shaft hole; one end of the stepped center shaft 2 is a spherical tie rod 21, and t...

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Abstract

The floating expansion mandrel of the present invention converts the radial force exerted by the claws of the machine tool on the radial drive pin into the axial force of the axial drive pin through the mutually perpendicular radial drive pins and axial drive pins, and the tapered surfaces offset each other. Force to change the direction of transmission force. The axial transmission pin is connected with the spherical washer through point contact, so as to achieve the purpose of being able to move freely. The spherical spacer and the spherical tie rod are connected through a spherical surface to realize free rotation, and the tension member realizes the function of expanding and opening. Since the floating expansion mandrel of the present invention can move freely in many places, it can realize the automatic tensioning function without manual adjustment, and can eliminate the mechanism / fixture manufacturing error.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a floating expansion mandrel. Background technique [0002] In terms of mechanical design and processing, in order to improve the strength of parts, the auxiliary structure is usually designed as one with the main structure, which invisibly increases the difficulty of mechanical processing. In mass production, in order to save raw materials, the workpiece to be processed has a small blank margin, and the outer circle cannot be clamped by the machine tool, or the wall thickness of the workpiece to be processed is thin, and clamping the outer circle is likely to cause deformation of the workpiece. If the traditional V-shaped clamping method is used, the processing efficiency will be greatly reduced; if the expansion mandrel clamping method is used, it may cause product quality problems due to inaccurate positioning references. In addition, the manufacturing error of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23B31/40
CPCB23B31/40
Inventor 陈伟张帆纪欢欢汤伏明石尚
Owner LANDING GEAR ADVANCED MFG
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