Involute cylindrical gear (Gears) is the basis of the mechanical transmission quantity bedding face is wide parts, widely in the car (Automobile), tractor (TRACTORS), machine tools, electric power, metallurgy, mining, engineering, lifting transport, ships, motorcycles, agricultural machinery, light industry, construction, building materials and military industry and other fields of application. Gear (Gears) and gear (Gears) box in the domestic and foreign trade have been subject to the goods. The quality of the gear (Gears) with reliable work, long life, low vibration noise for the guidelines. In addition to the material heat treatment hardness factor, precision machinery manufacturing is as the key. NPC, according to German G H venter gear (Gears) expert information, manufacturing precision grade level difference, the carrying capacity of strength difference between 20 ~ 30%, and the noise from 2.5-3 db, the manufacturing cost by 60 ~ 80%. Gear (Gears) design, process, manufacturing, testing and sales and purchase with gear (Gears) accuracy standard for important basis.

1 the development of international gear (Gears) accuracy standard

Gear (Gears), s in the century, precision standard BS 436-1940, the United States in the UK gear (Gears) manufacturing association AGMA 231.02-1941, the German company engineers association ADS proposal 1643-46, France, the Soviet union TOCT NFE 23-006 (1948), etc., during the period of the gear (Gears) standard, regulation of less precision grades (grade 4 ~ 6), from the perspective of geometry gear (Gears) parameters specified project, according to the very simple model to determine the tolerance value.

50 s with gear (Gears) manufacturing technology, the measuring instrument and the use of the accumulation of experience, for the precision of Gears, Gears meshing principle and theory study, all countries in the world for the precision standard revision of gear (Gears), to the German DIN 3960 ~ 3967 (1952-1957), 1643-1956 standard and the Soviet union TOCT, precision level and errors of gear (Gears) project, specifies the tangential and radial composite error, established a comprehensive error and the relationship between the individual error, the independent regulation clearance coordinate system, and according to the reasons of the error and the error of the impact on performance, put forward the precision grades and allowable error classification concept. The assessment accuracy, reduce waste, reduce the manufacturing cost, etc is extremely advantageous.

International trade development in the seventy s, the precision of gear (Gears) to the international unified standard, in the same symbols, definition and tolerance value error, France in 1951, the Soviet union, Britain, Belgium and Switzerland the six-country ISO/TC/WG2 60 (gear (Gears) technical committee working group 2), is responsible for the precision of gear (Gears) ISO standards, the French for the secretary, after more than ten years of consultation and discussion and validation, proposed in 1967 ISO/DR 1328 the parallel axis involute cylindrical gear precision (Gears) - ISO system "(draft). On March 20, 1970 in ISO/TC 60 by 20 votes in favor of the sixth plenary session, 5, 5 tickets reservation discussion through the "draft standard", WG2 according to the advice and partial modification, finally passed in 1975, as the formal standard ISO 1328-1975. This international standard except Germany, the United States, Japan, all countries in the world with equal or equivalent with ISO 1329-1975 standard revised their respective countries. And, due to the advanced industrial countries in Germany, the United States, Japan adopted the ISO 1328-1975 standard, the formation of the gear (Gears) precision standard in fact.

In the eighty s, ISO/TC60 / WG2 (gear (Gears) technical committee working group 2) by Germany, the United States and other countries to participate in the ISO 1328-1975 standard revision work. ISO in 1992 ~ 1998 are formally promulgated the ISO 1328-95, and ISO 1328-97: in the two standard, ISO/TR 10064-92, and 96, the ISO/TR 10064 - the children of the ISO/TR 10064 - and 96, the ISO/TR 10064 - and 98 of four technical report of complete sets of alternative and abolish ISO1328-1975 standard system. The ISO 1328 standard system (Gears) accuracy in the ninety s, is a further development on the basis of ISO1328-1975 standard and the revision, absorbing the German DIN the AGMA standard mature technology, make the standard more scientific and reasonable, from gear (Gears) transmission dynamic performance and carrying capacity, combining with gear (Gears) manufacturing rule in the standard in this paper, and the technical report, clear one by one. Every enterprise has earnestly implement the ISO 1328-1975 standard, familiar with and master and implement the ISO 1328 standard in the ninety s, and lived in the same precision level of circular gear (Gears). To improve the transmission performance and the effect of the bearing capacity and reduce the manufacturing cost.

2 the cylindrical gear (Gears) precision standard conditions

In China 1960 years ago have no cylindrical gear (Gears) precision standard, the direct application of the Soviet union TOCT 1643-46 standard, in 1958 the first mechanical forces working on industry organization, through analysis, research, and to verify the Soviet TOCT 1643-56 standard JB 179-60 drawn up and promulgated the cylindrical gear (Gears) transmission tolerance of machinery industry standard. At that time, the development of mechanical industry to play an active role, and soon reached the '50 s world level, the national machinery industry reform and opening up, in the late seventy s, demand quickly catch up with the pace of the gear (Gears) development, the ministry of machine building leadership decision, revised directly based on ISO 1328-1975 international standard JB 179-60, equivalent to the ISO 1328-1328 standards, JB 179-81 and JB 179-179 issued by involute cylindrical gear precision machinery industry ministry standards. Stable cross vigorously, promote the cylindrical gear (Gears) precision quality improved obviously. It drive gear (Gears) domestic machine tool, cutting tool and the development of the instrument, issued in 1998 and technical supervision for GB 10095-88 national standard involute cylindrical gear (Gears) precision. Our country in reform and opening up, economic development policy instructions,. A lot of the introduction of Germany, Japan and other western developed countries industrial machinery products, accessories for need localization, JB 179-83 and GB 179-88 standard does not adapt, on the one hand, encourage directly by Germany, Japan and the United States standards, on the other hand to stable cross to supplement in the form of administrative documents. Pitch deviation and pitch cumulative error, the tooth error four will check project to evaluate the precision of gear (Gears) level. XuanGuanZhong found to tooth shape error precision of the most difficult. The tooth profile of gear end regulation is not reasonable, met the requirement of the tooth profile accuracy of the pitch accuracy is surplus and not coordinated. Advanced enterprise summary part, jitc technology at home and abroad experience, positive technical measures are taken, produce with the world level gear (Gears) products. Above these, as compared with the ISO 1328 standard in the 1328 s in many key areas are consistent. At present in the major machinery and equipment needed for involute gear (Gears) can be localized.

The current GB 10095-88 involute; Live round gear (Gears) precision of the national standard is equivalent with ISO 1328-1975 international standard, has been to ISO 1328-1975 standard in the world now voided by ISO 1328 sets of standard instead of in the ninety s. In 1997 by the state bureau of technical supervision under the task to revise the GB 10095-88 standards, through the ISO 1328 sets of standard translation in the 1328 s, digestion and the opinions from various aspects, most think the gear (Gears) products in our country should be in line with international standards, to promote the international and domestic gear (Gears) products trade, development of gear (Gears) production. Revised GB 10095-88 national standard should be equal to the ISO 1328 complete set of international standards in the ninety s.

The state bureau of technical supervision and the national mechanical industry bureau encourages for technological progress urgent and conditional gear (Gears) manufacturing enterprise, directly using the ISO 1328 international standard in the 1328 s as the enterprise standard production gear (Gears) one step ahead, in-depth and fully give play to the role of the ISO 1328 international standard in the 1328 s, for the enterprise truly improve the quality of gear (Gears) performance, to reduce the manufacturing cost to improve the efficiency, into the international market.

3 ISO1328 complete set of international standards in the ninety s and 1328-1975 international standard (ISO), the difference between GB 10095-88 national standards

4 conclusion

International ISO/TC60 gear (Gears) the revised and promulgated by ISO technical committee ISO 6336-96, and 96, the ISO 6336 - the children of the ISO 6336-3, 96, the ISO 6336 - from 96 of spur gear (Gears) and helical gear (Gears) bearing capacity calculation of international standards, specific application in the standard gear (Gears) precision grade must be ISO 1328, "95 international standards, they are gear (Gears) design and manufacture of form a complete set of international standards. Gear (Gears) products is international trade goods, ensure the quality of gear (Gears) performance and reliability of the international standard has certain authority.

ISO 1328-95 took such as complete sets of international standard is the latest standard of maturity. Gear (Gears) products new design USES this standard can significantly improve the quality of gear (Gears) performance, make the recognition and welcome by customers at home and abroad, the gear (Gears) products to switch to the new standard as long as the old design precision grade unchanged on manufacturing pattern, on the title bar of the corresponding phase and tolerance appropriate modification (Gears) and gear billet precision can be adjusted. It can obviously improve the performance of the gear (Gears) at the same time reduce the manufacturing difficulty of gear (Gears) and save production cost, increase economic efficiency.

GB 10095-88 national standards in the process of revision is to examine and approve, before not issued, according to the state economic and trade commission, planning commission, science and technology commission, bureau of technical supervision joint mandate and state bureau of technical supervision to the spirit of no.35, guide and encourage enterprises, knowledge and direct application of ISO 1328-95 took the original and the translation of complete set of international standards such as design and manufacture of gear (Gears), it will contribute to the quality of the gear (Gears) and the improvement of economic efficiency, promote industrial gear (Gears) mechanical transmission products in line with international standards and development rapidly.