1. CA6140 lathe spindle technical requirements and functions Spindle Lathe CA6140 is stepped on a mounting support bearings, cylindrical, conical surface transmission parts, install the sliding gear spline, installation chuck and top conical surface inside and outside, connecting fastening spiral face nut through the hole bar and so on. The following describes the technical requirements of the role and the main part of the spindle: ⑴ two spindle bearing journal bearing journal A, B roundness tolerance of 0.005mm, runout tolerance of 0.005mm; while bearing journal taper 1:12 The contact rate ≥70%; surface roughness Ra of 0.4mm; the dimensional accuracy of the bearing journal is IT5. Because the spindle bearing journal is used to install the support bearings automotive shafts, is part of the spindle assembly datum, so it's a direct impact on the manufacturing precision rotary precision spindle components. Spindle taper bearing journal relative positional accuracy is supported by the use of the journal A, B as the positioning reference, and let be processed in a grinder bench clamping spindle machining to be guaranteed. To support the journal as a positioning reference processing within the cone, in line with the principle of coincidence benchmark. Before grinding the tip cone, reference should be made as a positioning bearing journal A, B reaches a certain accuracy. Spindle taper grinding generally use a dedicated fixture, shown in Figure 6-5. Fixture from the base 1, frame 2 and 3 floating chuck three parts, two brackets fixed to the base shaft parts, as the workpiece positioning datum journal on two blocks of two V-shaped bracket, V-shaped block inlaid carbide to improve wear resistance and reduce the workpiece journal scratches, center piece of the high should be exactly equal to the high center grinding wheel axis, otherwise it will make the bus hyperbolic cone, impact contact precision cone hole. Backend floating chuck with taper spindle taper grinding machine installed in the hole, the workpiece inserted in the end of the elastic sleeve, spring will float along with the workpiece chuck shell pull to the left, through the ball is pressed against the inlaid carbide taper shank end face, limiting axial movement of the workpiece. In this connection mode, you can ensure the positioning accuracy of the workpiece is not supported by the inner circle of the journal impact grinder spindle error, but also reduce the impact of vibration on the machine itself, the processing quality. Forged shaft parts, Jincheng shaft parts, please look for the gear provided by Luoyang Fuyuan Fuyuan Gear Machinery Co. Luoyang Fuyuan Gear Machinery Co., Ltd. (www.lyfycl.com) strong, credible, in Luoyang gear industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Fuyuan gear and you hand into the brilliant, for a better future!