Air Suspension Positioning and Clamping Device for Inner Hole Grinding of Workpiece

Abstract

The invention provides an air suspension positioning and clamping device for grinding an inner hole of a workpiece. The air suspension positioning and clamping device comprises a grinding clamp base mounted on a working table of an inner round grinding machine, a clamping device base and a drive motor for driving a rotary shaft of the clamping device base to rotate are mounted on the grinding clamp base; a shaft sleeve is mounted in a shaft sleeve hole on the clamping device base; a front bearing and a rear bearing are mounted at the two ends of the shaft sleeve respectively; the rotary shaft is mounted at the outer end of the rear bearing through a clearance ring and a thrust plate; a rear cover is mounted at the rear end of the thrust plate mounted on the rotary shaft; a compressed air channel communicated with an air inlet nozzle of the rear cover is arranged on the shaft sleeve, the rear bearing, the clearance ring, the thrust plate and the rear cover; a venting hole communicated with the compressed air channel of the shaft sleeve is arranged on each bearing body of the front bearing and the rear bearing; a belt wheel driven by the drive motor is also mounted on the rotary shaft at the outer end of the rear cover; and a tensioning screw mounted at the end of the rotary shaft penetrates through the rotary shaft and is connected with a tensioning part matched with a taper hole of an elastic tensioning head at the other end of the rotary shaft. According to the air suspension positioning and clamping device, the workpiece can be ground by air suspension positioning of the inner hole.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to a clamping and positioning fixture in grinding processing, in particular to an air-suspension positioning and clamping device for workpiece inner hole grinding. Background technique [0002] With the continuous innovation of technology, the processing accuracy of products in the field of mechanical processing is also constantly improving. In the current grinding process, the cylindrical grinding of cylindrical workpieces is processed by cylindrical grinding or centerless grinding. For the same For cylindrical through-hole parts that require high shaft precision, the inner hole is usually ground by internal grinding to obtain high-precision dimensions and smoothness. Or process the inner hole by honing. When honing the inner hole, use the oil stone on the mandrel to grind the hole wall through pressurized expansion. With the honing process, the precision and smooth...

AI Technical Summary

Problems solved by technology

With the honing process, the precision and smoothness of the inner hole can be well controlled, but because it is an uncentered process, it can only grind the existing inner hole wall evenly, but it cannot correct the coaxiality of the inner and outer circles. degrees of center deviation

[0003] In addition, when the internal grinding machine is grinding the inner hole, the workpiece clamped on the rotating spindle of the machine headstock is processed by the internal grinding wheel. The workpiece can be corrected before processing, but the jaws on the rotating spindle of the grinding machine Or other fastening methods to clamp the workpiece, although the adjustment accuracy is high, there will be a gap due to the cooperation between the rotating spindle of the internal grinder and the bearing, which will affect the accuracy of the workpiece during processing, and the calibration will waste a lot of time. Big discount

[0004] In short, the honing process has high precision, but it cannot be centered, and the internal grinding has solved the centering problem, but the accuracy is not high, and the time is wasted and the efficiency is low when correcting.

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