The flywheel ring gear is heated and set on the outer edge of the flywheel. After cooling, it is fastened to the outer edge of the flywheel. It is used to mesh with the starter gear to drive the crankshaft to rotate and start the engine. The flywheel ring gear is subject to huge friction when working, so we often use induction heating equipment to heat treat the flywheel ring gear to improve its wear resistance and service life. Today, the editor will take this opportunity to tell you about the induction hardening process of flywheel ring gear.
(1) Selection of induction heating power supply for flywheel ring gear
The selection of the induction heating power supply for the flywheel ring gear is mainly based on the module of the gear teeth, the outer diameter and width of the ring gear. Take a truck flywheel ring gear as an example, m=3mm, the outer diameter of the ring gear is 325mm, the tooth root is required to be 1.0-3.0mm, and the electronic tube high-frequency power supply is 100kW, 200-250kHz; another tractor engine flywheel gear Ring, m =4mm, outer diameter is 482.6mm, tooth width is 25mm, then 8kHz, 200kW medium frequency induction heating power supply is used. At present, most car flywheel ring gears use high-frequency power supply 10OkW, while tractor flywheel ring gears use both 8kHz and super audio power supplies. After the above types of flywheel ring gears are quenched, the teeth are basically quenched, and there is a hardened layer at the tooth root. The depth of the hardened layer is >1mm. This quenching method results in full tooth hardening, with a hardened layer at the tooth root. In order to improve the gear Regarding the toughness of the teeth, the tractor flywheel ring gear sets the quenching hardness requirement to 41-49HRC. The flywheel ring gear is quenched using modern technology, dual frequency, to obtain a hardened layer distributed along the tooth profile, and the result will be better.
(2) Induction hardening process of flywheel ring gear
The ring gear adopts one-time heating and rotation quenching. After heating, spray the liquid for a period of time to obtain self-tempering. The quenching cooling medium generally uses water at 15-30℃.
There are two ways to squirt. The first method is to drill a spray hole on the effective ring of the sensor, heat it to temperature and pre-cool it directly to spray water for a few seconds, then stop spraying to allow the heat from the center of the ring gear to be transferred to the outer surface, causing the gear teeth to self-temper. The self-returning degree is between 300-400℃ according to the hardness requirement. The biggest benefit of using self-tempering in the flywheel ring gear is not only energy saving, but also timely tempering, which is very effective in preventing tooth quenching and cracking. The second method is to heat the ring gear with a ring inductor. After heating and pre-cooling, the ring gear falls into the liquid injector for quenching and self-tempering. After heating with this method, the workpiece must fall into the liquid sprayer correctly. This type of sensor has a longer service life than the first type, but it has an additional descending action. An internal combustion engine factory's test results indicate that the deformation of the ring gear after immersion quenching is smaller than that of liquid injection because the inner ring and outer circle are cooled at the same time.
The application of flywheel ring gear is quite extensive, and its quenching widely uses high-frequency power supply, medium-frequency heating power supply and super audio power supply. Zhengzhou Gou's is a manufacturer specializing in the production of induction heating equipment. The equipment it produces has achieved good results in the fields of quenching, welding, and forging of workpieces. If you also want such equipment, if you also want to know more information about workpiece quenching, then leave a message with us to get a quote.
en 
cn 
jp 
ko 
de 
es 
it 
ru 
pt 
vi 
th 
pl 
GS-ZP-1200
