The application of technology of high speed milling in automobile manufacturing industry

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  • source:EAMOM CNC Machining
In a few years of in the past, the replacement scheme that high speed milling serves as common milling or report machines and complement, firm establish the position that keeps abreast of with conventional treatment craft. Because it is machining the three-dimensional curved surface, distinct advantage that exceeds hard data side, it basically applies at the mould to make with small lot nicety complex part processes a trade. The automobile industry that spare parts of big to the requirement batch produces will tell, high speed milling also has its original place. Machine a respect in car mould especially, the auto industry that develops flourishingly in last few years posed grim challenge to car pattern company of China, reflect not just go up in periodic to delivery strict requirement, should saying is the comprehensive challenge that designs ability, craft ability and engineering capability to car mould industry. Tell from the breakthrough of craft and engineering capability, technology of high speed milling is in shorten mould production cycle, rise there is distinct treatment advantage on production precision. Archetypal spare parts produces the prosperity as car market quickly, of the car change faster and faster, ask cycle of new product development shortens as far as possible. And efficiency of treatment of high speed milling is tall, but cutting is complex model face antrum, especially with stand lie change 5 axes linkage to wait flexible treatment means photograph is united in wedlock, it is the admirable solution that archetypal spare parts makes quickly. Pattern of car spare parts machines place of a car to need on the mould 1000 pairs, the production cycle of the mould and quality affect the manufacturing cycle of the car and quality directly. High speed milling in the car production respect of complex part pattern has distinct advantage. For example: When center of high speed milling is machining the model noting model of safe door lock, the hardness that processes data is 54HRC, use the smallest cutting tool is 0.

6mm, the biggest cut deep 4.

8mm, exterior surface roughness amounts to Ra0.

4mm. And need benchwork working procedure no longer, shortened handling time. If machining car window to rise automatically,fall again when the model noting model of systematic gear case, the hardness that processes data is 58HRC, direct milling part amounts to workpiece 85% , the others 15% through report treatment is finished, total handling time is 16h, shortened 50% of handling time. Car interior trim of mould treatment car change reflect not just in function rise on, more body reachs interior trim in car exterior now go up newlier. Car interior trim many to note model, the wastage of the mould is big, high speed milling can raise the production precision of the mould, prolong the service life of the mould, rise thereby note model quality. This shows, high speed milling reachs interior trim in pattern of car spare parts body revealed huge technical advantage on the treatment of the mould. Machining craft respect, high speed milling basically applies in the following link in car mould treatment. (1) craft of treatment of treatment electrode discharge basically needs two electrode to process a work. If want to undertake discharging machining better, need duplicate and identical electrode, will unite the electrode of divisional rough machining and finish machining through exterior quality. The electrode with good consistency can reduce the time that discharge machines. The electrode of traditional milling needs manual polish, consistency is poor, and the electrode after manual polish always contains pointed part, and the quality that point discharge can affect report to machine. The electrode of high speed milling need not artificial polish, the nearly perfect consistency between rough machining and finish machining electrode can optimize the efficiency that discharge machines. In the meantime, because high speed milling can machine Bao Bi, can machine the integral electrode that leads costal region consequently, this eliminated the position that clip generation holds for many times in traditional milling to accumulate an error, corresponding ground saved time and improved quality. The effect contrast that expresses conventional treatment and high speed treatment machines means, total industry ordinal number, total time (H) , model groove is machined (H) , treatment precision (Mm) , tradition of exterior surface roughness is machined, 22, 256, 179, ± 0.

2 ～ ± 0.

5, Ra1.

6 high speed are machined, 17, 120, 44, ± 0.

10, Ra0.

4 (2) the rough machining of the mould and semifinishing machining because high speed milling can be machined directly on hard steel of temper by dipping in water, theoretic it is OK and direct milling gives a pattern. But when mould antrum has special demand, still need what report machines to cooperate. Accordingly, can be after material heat treatment, use high speed milling machine to undertake the rough machining of mould antrum and semifinishing machining, and leave lesser surplus, by report treatment completes the precision work with final mould. (3) immediate treatment finishs mould of hard steel of temper by dipping in water this kind of means is advantage of milling of the high speed in mould treatment is the most general now. Forging with commercial vehicle of limited company of east wind car the high speed mill that the factory applies Mikelang machines crankshaft and connecting rod forging die to be exemple, traditional treatment working procedure is: Appearance rough machining finish machining of appearance of heat treatment → of → of rough machining of mill of → profile modeling chamfer aggrandizement of surface of → of polish of burnish of benchwork of → of thick, finish machining chamfer chamfer handles electric spark of → numerical control. And the working procedure after using high speed to machine is: Appearance rough machining aggrandizement of surface of → of treatment of mill of → high speed chamfer handles precision work of appearance of → heat treatment → . Use high speed milling to machine mould of hard steel of the temper by dipping in water that finish to have clear treatment advantage directly, it makes total finished cost is machined from the tradition 27000 multivariate fall 22000 yuan. CNC Milling CNC Machining