What are the requirements for hot precision forging technology for precision parts processing? Precision parts processing bevel gear transmission is a kind of gear transmission used to transmit motion and power between two intersecting axes in space. For the convenience of calculation and measurement, the big-endian parameters are usually taken as standard values. The angle Σ between the two axes of a pair of bevel gears is called the shaft angle. Its value can be arbitrarily selected according to the transmission needs. In general machinery, Σ=90° should be taken more.
The precision forging process of spur bevel gears processed by precision parts is now used in the mass production of planetary bevel gears and side bevel gears of automobile and tractor differentials, as well as the manufacturing process of bevel gears in agricultural machinery and construction machinery transmission boxes. The precision of the tooth shape after precision forging is 8, which can be used directly without machining.
The hot precision forging process of spur bevel gears has been used for many years. The main process in the early stage is open die forging with a friction press. In order to ensure that the tooth shape can be completely filled, pre-forging, final forging and subsequent two flash cutting are generally required. to complete. A large number of hot forging forming and warm forging finishing are used in one fire and two forging process. The process flow is: blanking → heating → upsetting → pre-forging → cutting flash → cleaning → final forging → cutting flash → air cooling, inspection → warehouse .
The equipment configuration for precision parts processing is generally:
1. Billet making High-speed band saw, sand blasting machine.
2. Heating 4000Hz, 160kW intermediate frequency induction heating furnace.
3. Upsetting 800kN open press.
4. Pre-forging 3000kN friction press.
5. 1600kN open press for cutting flash.
6. Final forging 3000kN friction press.
7. Secondary cutting flash 1600kN open press.
8. Pile cold storage boxes.
In recent years, in order to save human resources and improve production efficiency, precision parts processing has developed automatic precision forging gear technology and equipment on hot die forging presses in China. The main process flow: blanking → heating → upsetting → pre-forging → final forging →Cut flash →air cooling, inspection →man library. A hot die forging press is used for multi-station die forging and trimming, and the inter-process transmission adopts a walking beam, coupled with an intermediate frequency induction heating device, which can realize the unmanned production process.