Automotive Gear introduces the development of processing technology

Number of visits: Date:2011-5-24
Gear, the car industry is mainly based transmission components, usually 18 per vehicle to 30 teeth, gear directly affect the quality of the car noise, smoothness and service life. Gear cutting machine is a complex machine system is the key equipment of the automotive industry, the automotive world powers like the United States, Germany and Japan are also gear machine tools manufacturing power. According to statistics, more than 80% car gear teeth by the domestic system to complete processing equipment. Meanwhile, the automobile industry consumes more than 60% of the gear machine tools, automotive machine tools will remain the main consumer.
Gear processing
1. Forging billet
Hot forging is still widely used in automotive gear parts, blank forging process. In recent years, cross-wedge rolling process technology in the shaft has been on large-scale promotion. This technology is particularly suitable for the more complex ladder shaft system blank, it is not only high precision, the order of a small allowance, and high efficiency.
2. Normalizing
The purpose of this process is to obtain for the order of the hardness of the gear cutting and organizational preparations for the final heat treatment to do in order to effectively reduce the heat deformation. The gear steel material is usually 20CrMnTi, due to the general normalizing personnel, equipment and environmental impact is relatively large, making the cooling rate and cooling of the workpiece uniformity is difficult to control, resulting in poor hardness scattered large, uniform microstructure, a direct affect the final heat treatment and metal cutting, heat deformation without making the law, part quality can not control. To this end, isothermal normalizing process. Practice has proved that effective change by isothermal normalizing normalizing the general shortcomings of the product quality stable and reliable.
3 turning
To meet the requirements of high-precision positioning of the gear machining, gear blanks used in all CNC lathe machining, mechanical clamping is not re-grinding lathe to achieve a lower aperture in a clamping, face and OD process synchronization is complete, both to ensure internal end of the vertical hole and requirements, and ensures the production of large quantities of gear blank discrete small size. Thereby increasing the precision gear blanks, gear to ensure the order of the processing quality. In addition, CNC lathe machining efficiency but also greatly reduces the number of devices, the economy is good. 4 roll, gear
Processing equipment used in the tooth is still a large number of ordinary hobbing and gear shaping machines, although the adjustment and easy maintenance, but the production efficiency is low, a larger capacity if needed to complete multi-machine at the same time production. With the development of coating technology, hob, insert the blade after grinding is easily re-coated after coating can significantly improve tool life, generally increase more than 90%, effectively reducing the number of tool changes and grinding time, a significant benefit.
5. Shaving
Radial shaving technology with its high efficiency, design profile, tooth modification to the requirements of the advantages of being easy to implement widely used in mass production of automotive gear. Since 1995 the company purchased the Italian company dedicated radial transformation shaving machine since the technology has been applied in this mature, stable and reliable processing quality.
6. Heat treatment
Automotive Gear case hardening requirements, to ensure its good mechanical properties. For the heat no longer grinding and processing of products, reliable heat treatment equipment is essential. The introduction of the German labor company's continuous carburizing quenching and easy production line, heat treatment to obtain a satisfactory result.
7 grinding
Mainly for heat-treated gear bore, face, and other parts of the shaft outer diameter finishing, in order to improve accuracy and reduce the size of geometric tolerance.
Gear machining using pitch fixture clamp, can effectively guarantee the reference tooth and installation of processing accuracy, satisfactory quality.
8. Dressing
This is the transmission, drive axle assembly of the gear teeth to knock before checks clear burr to remove them after the noise caused by abnormal sound in the assembly. Listen to the sound of a single mating or meshing integrated tester to observe deviations to complete. The transmission manufacturing company in the clutch shell with the shell parts, transmission housing and differential housing. Clutch housing, gearbox shell is load-bearing parts, generally by using die-casting aluminum alloy die-casting molds made of special, irregular in shape, more complex, the general milling process is a combination of surface holes and connection → processing → rough boring bearing bore hole → fine boring holes and positioning the bearing pin hole leak test → cleaning → detection.

TypeInfo: Industry News

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