Simple fixture for turning shaped parts

Our factory produces prismatic clips on the grinding machine. Its inner hole of φ20H7 (Fig. 1) can only be processed on C630 lathe because there is no special fixture. This is because the inner hole of the chuck of the C630 lathe (φ100mm) is larger than the opening size of the workpiece by φ35mm. Large, can pass it, this method is less efficient. To this end, we have designed a simple and easy fixture (Fig. 2) that allows the workpiece to be machined on any small lathe φ20mm.