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
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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 g

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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Example Embodiment

[0010] A polishing device for the center hole of the hollow shaft of an EMU includes a polishing machine main body 1, a nylon tapered polishing head 5, and a tapered tail joint 2 of the tapered polishing head 5 is connected to the polishing machine main body 1 through a locking device 3 At the same time, a cross-shaped sandpaper fixing groove 6 is provided on the head of the tapered polishing head 5, and the horizontal grooves of the cross-shaped sandpaper fixing groove 6 are wider than the vertical grooves, so as to be suitable for embedding sandpaper of different thicknesses. When the thickness of the sandpaper is thick, the sandpaper is movably inserted into the wider horizontal groove, and when the thickness of the sandpaper is thin, the sandpaper is movably inserted into the narrow vertical groove.

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

[0012] Two back-to-back sanding surfaces are movably arranged in the horizontal or ve...

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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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