The production and improvement of the silk plated nut of the medium plate reversible rolling mill. Shan Chun and Liu Shaoqing Qinhuangdao Shougang Plate Co., Ltd. 1 Introduction Qinhuangdao Shougang Plate Co., Ltd. Roll reversible milk machine is a hand device imported from Spain. The transmission form is driven by motor + The worm and the worm wheel rotate, and the worm wheel drives the spinning wire to rotate 1 to achieve the purpose of pressing. The milk force of the equipment is 30001 card screw single 氓 2 700, the material is 401., the pressure screw pays 屯 屯 18 12018, the material is called 194 2 asked. Since the factory was completed and put into production in 1993, the nut is pressed straight. The wearing parts have an average life of only 3 months. Due to the high consumption of nuts and high cost, it is a big problem that plagues the equipment management of our factory. Together with the milk of various high-strength boards of our factory, such as military board bridges and plates. Plates, etc., have a greater impact on the pressure on the nut, so our factory urgently needs to improve the compression nut to improve the service life.
3The calculation of the size of the screw and the nut of the nut is improved. The screw and the serrated tooth before the modification are modified. Before the modification, the lead screw is modified by 1 and the pitch of the screw of the factory is 25, the tooth The working height is . According to the standard zigzag thread calculation, the screw with the outer diameter of 3458.6, the screw dip 1 should be 48 tooth type work 1 large, the easy wear gap is only 1 , as the theoretical design, the outer diameter of the nut should be the nut. The gap of the screw head is 1.215, and the nut should be. 1 = 0.75 = 36, the buckle is right, I 1 press the thread of the screw nut, the pressure per unit area plus the gap between the screw bottom of the screw is 181.6, the line of commonly used aluminum bronze in the temperature range of 230 Expansion coefficient 19.2 certificate 40 in the temperature range 203, the coefficient of linear expansion = 1 夂 1 The heat generated by the wide screw spring during operation, mainly through the lubrication of the lubricating oil to dissipate heat, and the gap of the screw of the factory is too small. The lubricant does not flow smoothly, and the temperature of the lead screw rises sharply. When the temperature of the nut reaches 20,1, the expansion of the nut expands to =1=13, the gap of the lead screw is too small, which will cause the screw The silk mother is locked, the screw can rotate. When I use the paper size to make spare parts on the machine, the screw thread is too small, the screw can not work normally, and it is forced to replace after 8 hours. 4 change the original design to increase the gap for the above situation, increase the nut clearance, the modified situation 2 after the modified silk mother modified screw 1 modify the screw size, the screw inner 抒 changed to rounded transition, in the original teeth On the basis of the bottom size, increase the arc height by 1.5 and modify the size of the silk mother to increase the backlash Positioned for 1.2, 3 plus medium diameter. The gap between the thread size and the thread of the thread should not be too large, because the gap is large, the thickness of the tooth is relatively too weak, and the service life of the eagle is also reduced. The height of the tooth is not too high, because the height of the tooth is too high, which will affect The screw of the lead screw is screwed, and the top of the tooth is increased by the moment, and the tooth is easily broken.
5 strength check M material strength limit n safety factor R, milk force; D pressure nut outer diameter; D. pressure screw to meet the vertical diameter of the frame beam hole p can be used to squeeze the square P = modify the size The strength of the rear lead screw nut can be satisfied when the repair of the 甩6 is used for a month or so after the screw is pressed. During the maintenance day, the inspection time is used to check the wear condition of the lead wire nut. When the wear of the wire mother is reached, the wire nut is reintegrated. Moreover, the surface finish of the certificate is that the silk dux must be paired and processed. This is because the wire is worn and the angle of the working surface changes. The contact between the screw and the nut is not in face contact, but in line contact. When working in this case, the screw rod aggravates the wear of the silk mother, and the copper scrap is attached to the lead screw, and the wire movement is a very strong frictional resistance. The result is that the underside of the jade is only 766632, which enhances the strength and wear resistance of the material. 7 Conclusion After years of practice, the service life of the improved nut has been raised, more than double, basically meeting the requirements of use, reaching the expected 1 .
In short, reasonable size clearance, strengthen lubrication, ensure the silk thread finish of the screw, ensure the processing size, improve the nut material, and make the use of the silk fiel mother to make a sense of life. The thick plate magazine is the National Science and Technology Commission and the news. The national journals approved by the Dish for publication are for publication, volume, and authors to vote for this journal. He is technically interested in the research of the sisters. Ask the cap to highlight the text, 2, the word summary, choose 5 main labels and the author's surname, to the main solution may be attached 1 2 to print or use the Jing paper pen to write, especially Chinese and foreign characters The nickname must be accurate. zU 3 is submitted to the legal measurement unit, and the number of digital publications is hidden under the paragraph of the seventh text in the text, and is numbered sequentially, marked with the 铨 5 5, and the trade is blamed by the author, the journal Have the right to make a section or summary publication processing. We bring 2 waters from the day of receipt! Shi Zhi, the author can handle it by himself. In the month, the application for publication was notified by the notice that the deadline was not received. The name of the unit of the name of the real name is the detailed address and zip code of the unit. The winner of the award-winning project and the funded output of the fund are assisted by the authors. Welcome to the publisher's website. They are not respectful of the editorial department of the journal.
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