The combination of friction welding and forging

In the long axis gear because of its structural characteristics not only advanced technology so that the processing efficiency was significantly reduced, but also the high rejection rate, short service life of the die, the processing cost is greatly improved, did not give full play to the advantages of less or no cutting.
In the long gear shaft in the gear box products in production, according to the structural characteristics, the strength of the parts of the existing requirements and the production capacity of processing equipment, using new technology scheme of friction welding technology and precision forging gear combination, successfully solves the problem existing in the precision forging parts problems in the recovery of the precision forging of spur gear high quality and efficiency, reduce processing costs, improve economic efficiency.
The process plan is: the part One divides into two. screw air compressor, the mountains are called teeth and shaft. The process is: the axis of crude — — — &mdash gear forging; heat treatment after forging — — the teeth and the shaft friction welding &mdash welding; — the latter finishing — — &mdash — local high-frequency quenching; finishing. Used in the scheme of the gear precision forging and friction welding processing technology are more mature.
In order to ensure that the combination of these two processes can produce qualified product parts, focusing on the control of the following major processes:
1) heat treatment conveyor belt before forging. Friction welding of the unit pressure and torque is very large, in order to prevent tooth deformation and bite, first of all to the teeth of carburizing and quenching treatment, so that the hardness and strength to achieve the requirements of the drawings.
2) friction welding. This process is the key to the whole process plan, to ensure that the post welding gear and shaft of the coaxial degree in a reasonable range, to provide protection for the follow-up processing. Therefore, to take two measures: when welding, the gear tooth shape locating shaft, using a self centering spring chuck.
Second, the design of the tooth shaped positioning fixture, appropriate to increase the number of positioning teeth and extend the contact length of the positioning tooth, reduce the unit pressure of the tooth surface, reduce tooth deformation