Analysis of large machinery and equipment processing how to maintain quality
1. Control the quality of raw materials: high-quality raw materials are the prerequisite for the production of high-quality products. Our company uses 40Cr and 45 steel to manufacture gears. No matter through which way, raw materials to the factory after strict chemical composition test, grain size determination, purity evaluation. The purpose is to adjust the heat treatment deformation in time and increase the quality of tooth profile machining.
2, civilized production: gear transmission noise has more than 30% of the reason from burr, bump. Some factories in the gear box before assembly, the removal of burrs and bumps, is a passive approach.
3. Prepare organizationally for handling. It should be noted that in the normalizing or tempering process, the temperature of the furnace should be kept even, and the work piece should be heated and cooled evenly by using workstation utensils, and it is strictly prohibited to pile up together.
4, control gear accuracy: the basic requirements of gear accuracy: through practice verification, gear accuracy must be controlled in GB10995-887-8 level, linear speed is higher than 20m/s gear, gear distance deviation, gear ring radial runout tolerance, tooth tolerance to reach 7 level accuracy.
5, to prevent heat treatment deformation: teeth blank in rough machining into fine forging, normalizing or tempering treatment.