在设计自动线或专机时,常常以工件内孔作为输送或上下料的抓取部位。如加工齿轮,皮带轮、连杆以及类似带孔工件,就是采用斜面涨块涨紧轴孔来抓取工件。但是这种由涨紧轴孔来抓取工件的输送方式,往往由于工件厚度尺寸的误差,以及前一工位夹具定位面和后 In the design of automatic lines or special plane, often with the workpiece hole as the delivery or loading and unloading of the crawl site. Such as the processing of gears, pulleys, connecting rods and similar work with holes, is the use of inclined uplift shaft hole to grip the workpiece. However, this method of conveying the workpiece by clamping the shaft hole is often due to the error of the thickness of the workpiece and the positioning of the previous station fixture and the back