The production of scroll bearing - - ferrule processing

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  • source:GEOFF CNC Machining
Although scroll bearing type is numerous, grade of its structure type, public errand, material is chosen, difference of treatment method existence, but its make a process basically all contain the following content: Bearing spare parts is made - bearing spare parts is checked - demagnetization of bearing spare parts, clean, antirust, bearing is assembled - bearing finished product is checked, demagnetization of bearing finished product, clean - bearing finished product is oiled pack a bottle of finished product put in storage. Ferrule is the important part of scroll bearing, because the breed of scroll bearing is various, make the ferrule dimension of different type bearing, structure, make used device, technique wait for each not identical. Machine working procedure as a result of ferrule again much, craft demand of precision of complex, treatment is high, accordingly, the treatment quality of ferrule is having main effect to the precision of bearing, service life and function. The raw material that ferrule makes is cylindrical good stuff or tubal makings, according to shaping at present technology differs, scroll bearing ferrule has the following kinds of production processes commonly. 1)(club expects) next makings - forging - anneal (or normalizing - turning (cold Zhan shapes) - heat treatment temper by dipping in water, temper - grinding - the spare parts is checked - demagnetization, clean - refer fabricate 2)(good stuff, canal material) next makings - cold Zhan shapes - heat treatment temper by dipping in water, shape the method basically has the following kinds: Forge is caused model, turning shapes, cold Zhan enlarge shapes and cold (lukewarm) extrusion. Shape in above in the method, forging processing application is most wide, occupy the 80 ％ left and right sides of total output, to a few small-sized and general kind the product can use a stick (canal) expect direct turning shapes. 20 centuries since 80 time, a few small and medium sized business of our country are in medium or small cold Zhan was used in the production of ferrule enlarge and cold (lukewarm) extrusion craft. 1) forgings it is OK to shape to be machined through forginging eliminate a metal immanent blemish, improve metallic organization, make metallic streamline distributings reasonable, metallic tight ness rating is good. Forge in building processing technology to apply extensively at bearing processing, can finish the small-sized product from internal diameter ~20mm to arrive the treatment of the oversize product of external diameter 5000mm. Common forge causes model the method has: The treatment that heat up forge, cold forging treatment, lukewarm forge is machined, our country is given priority to with heating up forge. The treatment that heat up forge differs to divide again because of its processing equipment for: Freedom forgings treatment craft, compressor forgings machine of craft, smooth forge forgings craft and machine of forge of high speed Dui forging craft. 2) cold Zhan shapes craft of cold Zhan enlarge is one kind can raise overall material utilization factor, raise a metal to organize compact sex, maintain the advanced technique of metallic streamline sex, it is method of a kind of treatment that do not have bits. From theoretic say, the product that cold Zhan shapes does not need to undertake turning can undertake heat treatment and grinding are machined directly. Current, craft of cold Zhan enlarge basically applies at medium, small-sized deep trench ball bearing, its are main process is: Forging semifinished product (annular) - turning (except raceway groove) - Zhan enlarge (channel reachs part) whole way - two end panel use use soft tactics craft of cold Zhan enlarge and forge are caused model when craft, the precision of the product besides sufferring equipment precision to affect, suffer even shape the influence of mould precision. 3) turning shapes in bearing industry, traditional turning shapes the technology is to use special lathe, use concentration working procedure law finishs processing. But because this method place uses equipment to adjust difficulty precision of big, machine tool overall material utilization factor is low, low, accordingly this technique is being washed out. As the development of science and technology, CNC Turning machine tool develops quickly and perfect increasingly. Current, the product with high demand of complex, precision is using a few external forms increasingly CNC Turning shapes technology. The place on put together is narrated, the direction of ferrule processing should be to face metallic overall material utilization factor manufacturing efficiency is tall, tall, shape the way with tall precision develops. Accordingly, technology of technology of forge of high speed Dui, cold Zhan enlarge, CNC Turning shapes the technology will receive more and more application. CNC Milling CNC Machining