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China's development trend of the screw manufacturing technology

Can necessarily bad, screw pair is very short rotor life 3 screw plastic machinery plastic machinery industry in China is from light industry, chemical industry machinery factory developed, and is therefore the difference between the traditional mechanical plant, the general equipment conditions of poor,[link widoczny dla zalogowanych], backward technology of plastic screw machine manufacturing technology show the following trends: (1) For larger diameter of the screw, in the forging process under the conditions allowed, as far as possible rough forging. Standard diameter of screw: D = 30,45,65,[link widoczny dla zalogowanych],90,120,150,200,250,300 (mm). (2) between the screw and finished in the processing procedure shall be used during storage of hoisting means (3) Screw the typical process in the future should be: a turning forging a rough milling (such as the use of SB6332.SK6332A Second Machine Tool Plant in Qinghai semi-automatic or CNC thread milling machine, milling machine screw Italian Saporiti company) a heat treatment (quenching) of a CNC cylindrical grinding of a screw grinding (such as the use of Switzerland's RG series Reishauer thread grinder, thread grinders British company Matrix, Germany Karstens the company's thread grinder, thread looking Italian SU's bed and Hanjiang Machine Tool Plant of SK7432, SK7450 CNC thread grinder, as the accuracy of the screw of the plant, structure, yield and economic strength may be) a cloth polishing wheel (the ordinary numerical control device lathe.) (4) the removal belt polishing, wheel polishing cloth can be used to improve the production environment, and after grinding to ensure no damage to the screw size, shape precision, further reducing the surface roughness of the screw, increasing the life of the screw. (5) should be carefully examined after heat treatment the microstructure and hardness distribution. After the application of screw grinding dynamic precision screw designed a comprehensive inspection screw inspection device the size and shape accuracy. Coordinate measuring machines using only static checking is incomplete, unscientific. (6) of the screw presses all over the country's many professional plant mostly poorly equipped, poor product quality, should be rectifying,[link widoczny dla zalogowanych], transformation. Former Ministry of Machinery Factory professional ball screw (for example,[link widoczny dla zalogowanych], process equipment plant in Nanjing, Kunshan branch of Hanjiang Machine Tool Plant, etc.) if the use of existing equipment and technology to produce screw presses will greatly shorten our development process of precision plastic machinery. 4 screw quality testing and performance testing (1) compressor, industrial pumps, plastic machinery in all of the revolving screw, so the size and shape precision should turn state (dynamic) under test. In the past, the meter behind the development of industrial product development, so the foreign is tested with a coordinate measuring machine. Now at home and abroad have developed a CNC measuring center (such as Germany Klingelnberg company PNC65, Mahr's Primar measuring instrument, the domestic dynamic screw measuring frequency laser, CNC gear measuring centers, etc.), can turn the screw in the state , measuring all the dimensions, profile and so the geometry accuracy. Even the edge curve of the screw milling cutter can be quickly and easily measured. Therefore, the original model by a number of mechanical and optical coordinate measuring instrument or static measurement methods and instruments should be fundamental change. (2) the screw should be emphasized that the intrinsic quality (microstructure, hardness, mechanical properties, etc.) detection and control. (3) Screw the accuracy of detection of engagement (the gap and its uniformity, rotation accuracy, etc.), no suitable instruments were now past Chengdu Tool Research Institute has developed a precision screw vice tester, automatic detection with high accuracy, record spiral Deputy shot rotary precision and uniformity of the gap (4) compressors,[link widoczny dla zalogowanych], industrial pumps life of vice screw, vibration testing and the pressure of vice screw presses, material temperature, power consumption, life and other performance tests, in the past generally have not to the attention Room has a screw factory, vice performance test minimal. Performance testing of these products is only a small number of universities and research institutes in the country's laboratory for the future backbone of the screw factory specialized factories and industrial by-products should be gradually added performance of the screw or laboratory test room, some large foreign companies attach great importance to product performance tested, invested heavily in this area and manpower to ensure the continuous upgrading of products. Study: Music U.S. House, East Second Ring Road, Chengdu, section 16, with the Chengdu Institute I, Code: 610056 (edit Lvbo Cheng) (closing prayer date ,1999 --09--16) Machine magazine Du through the East Street Station to get off. Phone; 64322688,64343722 (with fax) 'Yu sent technology and machine tools '2 OOO ah on 2j

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