作为传递大扭矩的大型轴,其轴端一般采用180°对称键槽结构。双键槽的对称度、角度要求较高,传统工艺为钳工画线后,在龙门铣上采用V型铁装夹、找正加工,对称度、角度难以保证。通过分析造成对称度、角度误差的原因,对现有生产工艺进行改进,设计制作找正工装并进行验证,保证了180°双键槽加工精度符合图纸要求。 As a large shaft to transmit large torque, the axial end of the generally 180 ° symmetrical keyway structure. The symmetry of the double-keyed slot, the higher the angle, the traditional craft for the fitter draw lines, the use of V-shaped iron gantry milling clamping, to find processing, symmetry, angle is difficult to guarantee. By analyzing the causes of symmetry and angle error, the existing production process is improved, the tooling is designed and verified, and the precision of 180 ° double-keyway is ensured to meet the requirements of drawings.