Gear forgings are mechanical workpieces with teeth on the rim that can continuously mesh and transmit motion and power. The application of gear forgings in transmission appeared very early. With the progress of industrial development, the principle and use of tooth method, cutting machine tools and tools have appeared one after another. With the development of production, the quality of gear operation has been paid attention. Below I introduce to you how to produce gear forgings.

1. gear forging

After signing the contract with the customer, the forging factory can cut the metal raw materials and cut them into reasonable blanks only after issuing the material report according to the drawing material requirements, size specifications and other requirements. The blank is placed in a hot furnace, and the blank is heated and red, and the blank shaping can be improved after heating. Forging is carried out in the forging workshop. The forger controls the operating machine, forging hammer or press to forge the heated blank into a reasonable size. The forged blank shall be left with machining allowance. Then there is the forging blank cooling, there are many kinds of cooling methods, such as furnace cooling, air cooling, cold resistance and so on. According to the material and requirements of the appropriate cooling method.

2. gear machining

After the forging factory cools the gear blank, the forging blank can enter the processing workshop for processing. There are many processing technologies for gear forgings. The processing methods selected according to the different gear tooth shapes in the drawings are also different. Common processing methods include tooth hobbing, tooth polishing, tooth shaving, tooth grinding, etc. The gear tooth profile is directly machined by cutting tools with the same tooth groove shape of the gear. When the disc-shaped milling cutter is used to machine the gear, the milling cutter rotates along its own axis, and the wheel blank moves along its own axis. After milling a tooth groove, the wheel blank returns to its original place, and the gear blank is rotated by the dividing head.360 °/z. Mill the second tooth slot in the same way. Repeat until all gears are milled. Then heat treatment after shaving, heat treatment can improve the hardness and mechanical properties of gear forgings. Then grinding teeth processing. Make the product size accuracy, finish, etc. fully meet the requirements of forging drawings.

3. gear detection

Comprehensive inspection shall be carried out on the processed gear forgings, and the appearance inspection of the products shall conform to the size regulations on the customer drawings. Ultrasonic testing (UT), magnetic particle inspection (MT), hardness, carburizing and other drawings. In order to meet customer needs, the mechanical properties of gear forgings must be tested mainly for yield, tensile, impact, metallographic and other tests. After quality inspection, the finished forgings are packed into the finished product warehouse for shipment after rust prevention and painting.

Due to the wide application of gear forgings and the increasing number of gears with high speed and high performance requirements, gear grinding is required to improve efficiency and quality.