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Central hole polishing device for hollow shaft of motor train unit

A technology of hollow shaft and center hole, which is applied in the field of center hole grinding device of EMU hollow shaft, can solve the problems of out-of-tolerance and low precision of center hole grinding and repair, achieve precise grinding, reduce the labor intensity of grinding and repair, and improve work efficiency Effect

Inactive Publication Date: 2011-09-14
ZHIBO LUCCHINI RAILWAY EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a grinding device for the center hole of the hollow shaft of the EMU, which solves the problem that the grinding and repairing precision of the center hole in the prior art is not high, and new out-of-tolerance problems are easily generated

Method used

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  • Central hole polishing device for hollow shaft of motor train unit
  • Central hole polishing device for hollow shaft of motor train unit

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Embodiment Construction

[0010] A center hole grinding device for a hollow shaft of an EMU, comprising a polishing machine main body 1, a tapered polishing head 5 made of nylon, and a tapered tail handle 2 of the tapered polishing head 5 connected to the polishing machine main body 1 through a locking device 3 Together, the head of the tapered polishing head 5 is provided with a cross-shaped sandpaper fixing groove 6, and the transverse groove of the cross-shaped sandpaper fixing groove 6 is wider than the vertical groove, so as to be suitable for embedding sandpaper of different thicknesses. When the thickness of the sandpaper is thick, insert the sandpaper activity into the wider horizontal groove, and when the thickness of the sandpaper is thinner, insert the sandpaper activity into the narrower vertical groove.

[0011] The taper α of the head of the tapered polishing head 5 is 60 degrees or 90 degrees.

[0012] In the horizontal groove or vertical groove in the cross-shaped sandpaper fixing groov...

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Abstract

The invention discloses a central hole polishing device for a hollow shaft of a motor train unit. The central hole polishing device solves the problems that the polishing and repair precision of the central hole is low and new excessive tolerance is easily generated in the prior art. The central hole polishing device comprises a polishing machine main body (1) and a conical polishing head (5) made of nylon; a conical tail connecting handle (2) of the conical polishing head (5) is connected together with the polishing machine main body (1) through a locking device (3); and the head of the conical polishing head (5) is provided with a cross abrasive paper fixing groove (6), and a transverse groove of the cross abrasive paper fixing groove (6) is wider than a vertical groove so as to embed abrasive paper of different thicknesses respectively. The device disclosed by the invention realizes quick and precise polishing of the central hole of the hollow shaft of the motor train unit.

Description

technical field [0001] The invention relates to a grinding device for the center hole of a hollow shaft of an EMU, in particular to a device for quickly grinding the surface of the center hole of the axle of an EMU. Background technique [0002] When machining the center hole of the axle of the EMU, jumping occurs due to the out-of-tolerance of the center hole, burrs on the surface or iron filings, which reduces the precision of machining and easily produces waste products. Therefore, before machining, the center hole needs to be ground and repaired to meet the requirements of the machining process. At present, the method of grinding and repairing the central hole is generally completed by manually grinding with sandpaper. This grinding method is difficult to guarantee the accuracy of grinding and repair, and will cause new out-of-tolerance. In addition, manual grinding also has the disadvantages of low work efficiency, high labor intensity, and easy injury of operators. ...

Claims

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Application Information

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IPC IPC(8): B24B29/04
Inventor 白贵生王长峰元艳玲王艳萍张遥刘永亮刘春生
Owner ZHIBO LUCCHINI RAILWAY EQUIP
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