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
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[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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