The optimization goal is to reduce the forming load and increase the filling rate of gear forging. (1) Objective function model of forming load. The maximum load of gear forging process is the final forging force. Optimizing the forming load can not only save production energy consumption, but also...
The gear blank used for forging is aisi4120 steel, and its material composition and mass fraction are shown in the table. C Mn P S Si Cr Mo 18~23 90~20 ≤0. 035 ≤0. 040 15~35 40~60 13~20 The original gear blank size is Φ 60 mm × A 30...
In UG software, open the forging drawing interface, and open the analysis → measuring body → selecting body → volume window in sequence. It is concluded that the forging volume is 948732mm3. According to the principle of the same volume, the inclination angle of the forging side wall remains...
The main purpose of designing the precision forging blank of spiral bevel gear is to ensure that the metal can fill the forging die cavity smoothly during the precision forging of gear, so as to avoid the material waste caused by insufficient filling or flash of gear teeth. In...
As a transmission part, spiral bevel gear is widely used in automobile, machine tool, ship, aircraft and other related fields. It has the advantages of strong bearing capacity and stable transmission performance, which is favored by the machinery industry. As an important transmission part in mechanical equipment, the quality...
1) The initial forging temperature is high, the holding time is long, the gear grain is coarse and overheated; If the final forging temperature is low or the temperature of the blank gear itself has dropped very low during forging, micro cracks will occur in the gear, which has...
Some situations and solutions encountered in the forged gear blank production line are described below. (1) During parting, the forged gear blank can not always stay in the lower die, which is convenient for robot picking. This kind of press generally adopts hydraulic feeding and jacking structure, but the...
Straight bevel bevel gear is a component of automobile differential, which is made of low-carbon alloy steel. Its normal warm forging temperature range is 800 ~ 850 ℃. Warm precision forging of straight bevel gear: the tooth shape of the forging is net forming, which is basically close to...
1.Microstructure and performance requirements of forged gear blank 20CrMnTi is selected as the material of automobile gearbox gear. The technical requirements for isothermal normalizing of gear blanks are as follows: 1) The grain size is grade 5 ~ 8; 2) According to GB / t13299-1991 “evaluation method of microstructure...
In the original process, the forged gear blank is directly air cooled to room temperature after forging, and then rough turning and tempering. This process has the following defects: coarse grain, uneven hardness and insufficient depth of surface hardened layer after finishing. If the normalizing process is added after...