机械加工零件的工艺及夹具设计（中英文对照）

scientific progress and the adjustment of national industry policy, project machinery industry already became no policy barriers of perfectly competitive industry Key words: technical background / development / process / positioning scheme

1 Mechanical Processing Historical Background and Its

Significance

Machinery manufacturing industry is an old and eternal industry full of vitality. With the development of modern industry, the mechanical product of the increasingly high demand, machinery manufacturing technology are developing rapidly. Since the founding of new China, our country's manufacturing technology and manufacturing industry to obtain the considerable development, a considerable size and technical basis of mechanical industry system is formed basically. Years of reform and opening up, China's manufacturing industry to make full use of domestic and foreign two aspects of technological resources, there are plans to promote the technical

transformation of enterprises, guide enterprises to take the road to rely on progress of science and technology, manufacturing technology, product quality and level and the economic benefit produced marked change, in order to promote the development of the national economy has made great contribution. Although our country

manufacturing industry comprehensive technical level has been greatly improved, but compared with developed country, still have level sex difference. Enter the twenty-first Century, the economic development of our country 's leading industry still is the manufacturing industry, especially after our country joins WTO, the world's manufacturing center is developed from migration to Asia, China has cheap labor and the general consumer market, accordingly, industry of our country wants to develop, need to have appropriate technology and equipment support.

Machinery industry is the equipment industry of national economy; it is content of science and technology of foundation; is new and high technology industrialization; is the basis of national defense building; is to achieve rapid economic growth of the important pillar; is to improve people's living quality, provide consumer electrical

products supply industry. It runs to national economy, the quality and efficiency of industrial structure adjustment and optimization is a very important role.

2 The Status of Machinery Industry and Development Trend

With the development of society, all kinds of machinery and gradually applied to the various industry, whether in the agricultural, military, industrial, mechanical operation, leaving no efficiency, therefore, in some sense, the strength of a country's economy, social status, and the development of machinery industry is close separable. The industrialized countries economic development course indicated that, without a strong equipment manufacturing industry, is impossible to achieve national economy industrialization, modernization and information [3 ]. At present, the equipment manufacturing industry development lag is restricting China's economic development and industrial upgrading of the important factors, increase structural adjustment strength, promote mechanical industry lasts, healthy, steady development, to change the mode of economic growth, improve quality of national economy whole, enhance the international competitiveness of the economy, security and national defense security has important and far-reaching meaning of.

3 Of Machining Process Planning

3.1 Machining Process Definition

The machining process is the use of mechanical processing method of change in rough shape, size, the relative position and the nature, make its become finished or semi-finished products of the whole process. Machining process directly determines the parts and the quality and performance of products, product cost, production period has great influence, is an important part of the whole process.

3.2 Mechanical Processes

The composition of mechanical machining process of the basic unit is a process. Process and is formed by mounting, station, working steps and take the knife. The process is a group of workers, in a work of the same or simultaneously on several workpieces are completed for that part of the process. Process is the

formulation of labor quota, with workers and machine tool equipment, arranging operation plan and quality testing of the basic unit.

The installation is a workpiece by a fixture after the completion of the procedures. The application of switch ( or displacement) when processing machine tool ( or fixture ) processing, in a fixture, the workpiece ( or cutter ) relative to the machine tool passes through several locations in order processing, in each position is done on that part of the process, called station. The multi-station processing can reduce the times of clamping, reduce the mounting error, improve productivity.

The step is processing the surface in the cutting tool and the cutting parameters ( only refers to the spindle speed and feed rate ) are the same circumstances completed part of the process.

3.3 Machining Process Definition

Products or components manufacturing process and operation methods of the process, called process, it is the enterprise in the production of technical guidance document.

3.4 Machining Process Planning Function and Content

Machining process is ready for production work mainly on the basis of. According to its raw material and semifinished product supply, machine tool adjustment, special process equipment design and manufacturing, production scheduling, allocation of labor force, and the production cost accounting.

The machining process planning and organization of production, planning and scheduling based on. It can make production schedule and the corresponding scheduling, and can be connected to the scientific process, production is balanced, smooth, to realize high quality, high yield and low consumption.

Machining process card and machining process card, are the two main process documents. Machining process card, is illustrated parts machining process technology files. In a single, small batch production, to machining process card guiding production, process card various projects in the preparation of more detailed.

Machining process card for each process detailed formulation, used to direct workers, used for mass production parts and mass production of the important parts in the.

3.5 Making The Machining Process Planning Principles and Steps

Under certain production conditions, with minimal consumption of labor and the lowest cost, according to plans processing parts that meet requirements of the drawings, is to develop the basic principle of machining process. Formulation of machining process steps are as follows:

The under parts of the production program decision production type; The analysis of parts processing technology; The choice of blank type and manufacturing method; The technological process; The process design; The process documentation.

4 Fixture Design

4.1 Fixture Design Sense

In the machinery industry, how to guarantee the high precision of workpiece, the costs of processing and other substantive issues, has been engaged in the mechanical industry research questions, which in the design of fixture when we should consider the problems above, efficient fixture is the workpiece precision guarantee, how to make the fixture more efficient, more economical, the industry is the urgent need to resolve.

With the development of society, the continuous improvement of technology, various high-tech technology gradually infiltrated into all sectors, how to use these high-tech to serve mankind, how to make full use of the technology in mechanical industry, it also requires machinery industry staff continued efforts, innovation. With the development of science and technology, and social needs of the market, the fixture design in progressive super to the flexible manufacturing system