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Analysis of Super Finishing Skills of Bearing Rings
Source: China Bearing Network Time: 2018-01-17
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The term “super finishing†was created by Vilas of the US company Gorisla; when the roller bearings of the car wheel often have abnormal vibration and noise; the problem is that the bearing roller is formed on the outer surface of the bearing ring. Caused by the indentation. After selecting the soft surface of the bearing raceway, it can not only prevent the bearing ring from being indented; it also makes the vibration and noise drop significantly. Vilas completed this processing method. Mechanization; this is the earliest bearing ferrule superfinishing machine. Bearing super finishing is created in the United States; but now it is further developed in Europe and Japan. Especially the German Thielenhaus company; the development skills in the field of bearing super finishing are leading the world Level.
Second, the selection of superfine grinding process parameters The super-finishing workpiece rotation speed, the pressure per unit area applied to the oil stone, the vibration frequency and amplitude of the oil stone are the primary process parameters of the ultra-finishing process; the selection of these parameters directly affects The finished surface quality of the superfinishing machined workpiece.
As far as the processing method is concerned, it is usually divided into two types: oil stone and a variety of oil stone. The former is a piece of oil stone to divide the working condition into two sections; it is called one-stage two-stage method. The initial timeout; picking a large cutting angle Increase the pressure of the oil stone; it will cause a lot of grinding and falling of the abrasive grains; remove the processing traces of the previous process as much as possible. After the traces of the previous process are removed; the appearance of the processing is in the shape of a pear skin; For the super-finished grinding; at this time, the cutting angle is reduced. The gears are faded and swayed, and the shackles of the shackles are stopped.サ ç‹¡ ç‹¡ å‹Ÿ å‹Ÿ å‹Ÿ å‹Ÿ å‹Ÿ å‹Ÿ 爰 爰 爰 爰 爰 爰 爰 爰 爰 爰 爰 哟ッ婊黾 哟ッ婊黾 徊 徊 徊 徊 徊 徊 徊 徊 徊 徊 徊 徊 徊蛔鞴ç¬. Normally; rough timeout selects lower workpiece speed; higher oilstone vibration frequency and higher oilstone pressure; to achieve higher production power, higher workpiece speed in fine super stage; Low oilstone vibration frequency and low oilstone pressure; to obtain an aspirational processing appearance.
Usually the coarse overtime cutting angle is 20°-40°; the fine timeout cutting angle is 10°-20°, the oil stone pressure is usually 1-12kgf/cm 2 , the amplitude is usually 1-6mm, and the vibration frequency is usually 800-3000Hz. The best level of the workpiece spindle of domestic equipment is 8000 rpm. Because of the limitations of the production process of domestic oil stone; the domestic super precision machine is processed by multi-station method.
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