Flexible grinding and polishing compound arc sand wheel

Abstract

The invention discloses a flexible grinding and polishing compound arc sand wheel and relates to a sand wheel. The flexible grinding and polishing compound arc sand wheel comprises a sand wheel body, an air valve, an airbag arc-shaped adjustment device, an annular airbag, a grinding and polishing material ring and a compaction device, wherein an air channel is formed in the sand wheel body; the air valve is arranged in the air channel; the inner end of the air channel is communicated with an inner cavity in the annular airbag; the air channel is externally connected with an air source through the air valve; the airbag arc-shaped adjustment device is provided with a front airbag arc-shaped adjustment ring, a rear airbag arc-shaped adjustment ring and an adjustment drive screw rod; the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring are respectively nested onto the rear end surface of the sand wheel body; the adjustment drive screw rod penetrates through the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring as well as the sand wheel body and is in running fit with the sand wheel body; the front part and the rear part of the adjustment drive screw rod are in threaded fit with the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring respectively; the annular airbag is sleeved and pressed onto the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring; the grinding and polishing material ring is sleeved onto the annular airbag; a front pressure ring and a rear pressure ring of the compaction device are used for compacting the two end surfaces of the grinding and polishing material ring and the two end surfaces of the annular airbag respectively; and the front pressure ring and the rear pressure ring are fixedly connected with the front airbag arc-shaped adjustment ring and the rear airbag arc-shaped adjustment ring respectively.

Description

technical field

[0001] The invention relates to a grinding wheel, in particular to an ultra-precision aspheric grinding and polishing compound arc grinding wheel for flexible grinding and polishing. Background technique

[0002] Large-aperture aspheric lenses have the characteristics of large caliber, high image quality precision, and heterogeneous aperture. The giant laser device of inertial confinement fusion (ICF) uses large-aperture aspheric lenses to achieve laser beam focusing. The processing of such lens elements generally goes through two stages, namely grinding and polishing. The grinding stage mainly ensures the surface shape accuracy of the workpiece and reduces the subsurface damage to reduce the removal amount in the polishing stage; the polishing stage mainly removes the subsurface damage to further reduce the surface shape accuracy and surface roughness of the workpiece.

[0003] Grinding aspherical surfaces with traditional diamond arc grinding wheels is a b...

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