Both manual and automatic, are of good quality of auto transmission parts processing needs to have a suitable process and the method to ensure that, such as gear design and manufacturing, machining and heat treatment process, lubrication and sealing technology, etc. Recently held in anhui buried hill 2012 summit on China's gear industry development, not only for the transmission and gear industry transformation and upgrading, innovation and development are discussed, and the meeting also organized a number of technical experts, which provides an introduction to the field of gear processing technology from different aspects of the new development. 

 

Suitable for process and design of security comprehensive performance gear transmission equipment 

 

The comprehensive performance of gear transmission equipment by one of the parts, assembly process and lubrication medium. Foreign a lot of gear box (transmission) not only do the long life, and light weight, free maintenance, this is the most domestic enterprises are difficult to do. Nanjing Pai Wu Lin teng industry &trade co., LTD. Manager, through the advanced and reasonable design, choose the appropriate technology and assembly method, combined with advanced lubricating medium, domestic gear industry can also through the proper technique link to improve the anti-fatigue performance of transmission gear, prolong life, reduce noise, improve the transmission efficiency, energy saving, etc. 

 

In the design phase, choose the appropriate gear materials, advanced and reasonable structure design, selection of high efficient and reliable gear and bearing is an essential link. In gear machining process, the advanced blank forming process, the stability and precision of the heat treatment process, as well as the appropriate surface hardening treatment process, the key factors are eventually form gear boutique. As in grinding is there are a few key links: by choosing grinding blade sharp, small grinding wheel, grinding surface stress can improve the grinding feed, shorten grinding time, improve grinding efficiency and prolong the interval of grinding wheel dressing in order to reduce the cost; By using the appropriate grinding and grinding parameters, grinding burn in that there was no crack and under the premise of guarantee quality, use high grinding parameters as much as possible to shorten grinding time, improve grinding efficiency, increase production, and ensure the precision and reduce the surface roughness; By using suitable grinding oil, can guarantee under the premise of good lubrication, anti-rust, to reduce the grinding surface of the tooth surface stress, avoid burns, cracks, lower roughness and reduce the extent of the grinding wheel blowhole, ensure the grinding wheel, sharp decrease grinding wheel dressing, reduce the dosage of grinding wheel, reduce the cost. 

 

Machining center gear manufacturing become a new direction 

 

Beijing jiaotong university professor xiao-chun wang in his speech, this paper introduces the gear design and manufacturing technology based on machining center. 

 

As machinery manufacturing in a very special category, the characteristics of gear machining is a tooth surface is usually the machining of complex surface, with special shape, not only each tooth surface has a high accuracy, and also has a high relative position between each tooth surface precision of the gear ring between mounting surface and also want to have high location accuracy. 

 

After years of theoretical research and practice, professor xiao-chun wang summarized a set of machining center gear method, it not only for single small batch and large module gear processing provides a new kind of high efficiency, low cost, high flexible and rapid response manufacturing method, but also broke through the old manufacturing process of product structure, and for the transmission system of the high power density, lightweight, and the realization of some innovative design laid a foundation. 

 

With multi-axis linkage function of modern machining center can be high efficiency and high precision to work out all kinds of complex curved surface, and have good flexibility, by loading different G code, can be on the same machine tools work out different shapes and types of parts. Xiao-chun wang said, on the machining center processing the tooth surface, usually do not adopt the method of generating or forming processing, just use it as a surface machining, so the length of contact between the tool and workpiece is far less than the traditional gear processing method. 

 

Use reasonable structure of gear machining center, with good rigidity, positioning accuracy and repeat positioning accuracy, and when finish cutting force is far less than the traditional machining method, can obtain good machining accuracy. In addition, due to machining center has a knife library, tool change fast, in roughing and semi-finishing phase, can according to different work step to choose the most suitable tool to improve processing efficiency. 

 

Digital induction quenching process into a new method for gear heat treatment 

 

In gear in all kinds of heat treatment technology, often need to both work and time-consuming traditional craft to guarantee, such as carburizing, nitriding process. As the use of nearly a century of induction heat treatment of the traditional heat treatment technology, through continuous development and innovation in recent years, its advantage is more and more recognized by people, especially its high efficiency, energy saving, no pollution, easy to realize automation and other characteristics, fully meet the development direction of green technology today. 

 

Induction hardening technology of the gear wheel specialize research Emma's induction technology (Beijing) co., LTD., vice general manager yan full just said to introduce the latest progress of this technology, with the application of digital technology, the whole process of gear induction hardening by digital control, digital control is not only the numerical control machine tool, but also high frequency power supply, digital control technology to improve the reliability and repeatability of the great. 

 

Gear heat treatment deformation is caused by many factors, both the material and heat treatment process and material properties related to the thermal deformation, organization of deformation, such as volume change, there are also produced in each process in the process of gear machining internal stress release caused by the deformation in the process of heat treatment, such as its factors are complex. Adopt a correct die quenching process, is no longer constrained to a great extent before the gear machining process, and by limiting the size of quenching method, greatly limits the quenching after deformation, improve the product percent of pass and decrease the subsequent processing costs, especially in extremely easy deformation of thin-walled ring gear application effect is very significant. 

 

Through this accords with the concept of green manufacturing for induction hardening heat treatment technology, digital technology, digital intermediate frequency power supply technology, in particular, this process can be reliably, eliminates the past the induction quenching process of the digital age, caused by unreliable craze, carrying capacity of instability, poor life. 

 

A variety of technical solutions comprehensive power gear transmission industry 

 

Experts from dworkin holding group co., LTD. This paper introduces the future with fatigue, corrosion resistance, wear resistance and long life of bearing. Through the adoption of modern surface strengthening treatment technology, working in bearing parts into the surface of alloy elements, anti-wear elements and add elements, such as ion beam line PID processing technology, plasma PIID processing and deposition technology, etc., can make the bearing to reduce more than 35% more than 50% of friction loss and lower noise low noise of ultra-low friction, bearing life can reach 5 ~ 6 times the ordinary bearing. Through a third party testing evaluation, this kind of static state is stable and efficient bearings for more than two years under the condition of the test bearing 4 sets of samples are passed the 2700 hours of intensive life test. 

 

Gear transmission if seal is not good, the damage done by machinery in use process can be imagined. As Germany, one of the three major manufacturers of car seal design good solid which KACO company, in view of the shaft in the cutting process, grinding process such as processing screw axis may be produced in the course of oil and a variety of possible sealing structure, by using more acceptable on the design of eccentric deviation of dynamic seal, oil seal and persistent low friction sealing is realized. 

 

At the summit, and a few technical experts from industry related to transmission technology are introduced, such as Shanghai jiao tong university professor jian-wu zhang introduced the dry dual clutch of overlap joint dynamics and optimal control of the process, open letter machinery manufacturing co., LTD. Shanghai xiao-hu Chen, general manager of the gear of shot peening technology and application, Germany is good, solid which KACO czy, the general manager of our company introduces the sealing technology of gear, Sweden sandvik coromant xiao-dong xie introduce gear processing efficient solutions company manager, etc. Reporters feel that, in addition to people outside their innovation research and development of new technology, new technology, many technology from abroad, by domestic practice, improvement, practice, innovation and practice of benign cycle, the world's newest transmission associated with gear manufacturing technology application service to China's gear industry is not a hope, has now become a reality