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Treating and the modern mould make high speed (part 1)

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Update time : 2017-05-09 11:36:48

Treating and the modern mould make high speed
One, summarizes

 
1 the present situation that the mould makes at present and trend
 
    The mould is important handicraft equipment , occupies decisive position in industrid departments such as consumer goods , electrical equipment electron , automobile , aircraft fabrication. The mould is important handicraft equipment , occupies decisive position in industrid departments such as consumer goods , electrical equipment electron , automobile , aircraft fabrication. Industrial product part rough process 75%, the finish machining 50% and plastic part 90% will be completed from the mould. The Chinese mould market demand already reaches scale of 500 hundred million yuan at present. The automobile mould , the annual growth rate covering piece of mould especially will exceed 20 %; Also prompt building material mould development , various heterotype material the mould , wall surface and floor mould become new mould growth point , plastic doors and windows and plastic drain-pipe increase to exceeding 30 by in the upcoming several years %; The home appliance mould annual growth rate will exceed 10 %; The IT industry year increases % speed equally exceeding 20 , the need to the mould accounts for 20 of mould marketplace %.2004 annual Chinese machine tools implements industry output value will continue to increase. Our country mould fabrication market potential is enormous. The basis data counts , in recent years, our country mould year gross output value reaches 3 billion U. S. dollar , entrance exceeds 1 billion U. S. dollar, exceed 100 million U. S. dollar outlet. Increase by from 25% to increase to 2005 50% of 1995. The expert foretells that abroad: Asia portion being occupied by in mould fabrication in the whole world, will from 25% to increase to 2005 50% of 1995.
    Chinese mould industry has been expanding by leaps and bounds , has formed east China and two big South China bases, and has expanded gradually arriving at other province. In 2002 (Shandong , Anhui , Sichuan) in 1996 ~, mould manufacturing industry output value annual average growth 14% , grows by 25% in 2003. In 2003 our country mould output value is 45 billion RMB. The gross product place occupies the world the 3rd, exports a mould increases 33.5% compared to last year 336,800,000 U. S. dollar. But, contents low our country technology moulds already pile up in excess of requirement , very most support of accurate , complicated top grade mould imports. Every year the entrance mould exceeds 1 billion U. S. dollar. Exceed 100 million U. S. dollar outlet. Precise mould accuracy requires that 3 mu ms , large-scale moulds require that 8000 satisfied kN agree well with model force injection machine request in 2 ~; The minitype mould needs the request satisfying the diameter 1 mm silent stock tube. At present, adopt quick-cutting to produce a mould already becoming the general trend that the mould makes, a few moulds have produced a manufacturer in abroad , high-speed machine tool large area has substituted the electric spark machine tool , quick-cutting has improved the mould efficacy greatly. Machine tool enterprise aims at mould manufacturing enterprises , some treating centres 60% all above of the machine tool producing a factory sells treating enterprise to a mould. The mould fabrication enterprise substituting the electric spark finish machining mould gradually in abroad has adopt quick-cutting already commonly , quick-cutting has produced a mould already becoming the general trend that the mould makes gradually , has improved the mould efficacy and mass greatly. Adopt quick-cutting to replace electric spark producing a mould , can get on the stick obviously , improves mould accuracy , life time growing.
 
2 high speed processes application in making in the mould
 
2.1 quick-cutting merit:

1)cutter high rotation rate and the machine tool height enter be given to and high acceleration , improve metal excision rate greatly;
2) quick-cutting diminutions cut a force;
3) quick-cutting heat major part generate heat from the cuttings entrainment , workpiece being short;
4) quick-cutting cut down vibration , improve treating mass;

 2.2 high speed treating apply to the beneficial result that the mould processes

1) fleetness rough process and half finish machining, improve treating efficiency;
2) high speed high-accuracy finish machining replace only entire the height processing , indicating mass , form accuracy rise , 50%, cuts down repair a mill by hand than EDM processes a potentiation;
3) cuts the surface processing final molding stiffly , improve surface mass , form accuracy, the treating (not only being that surface harshness is low, and the surface radiance is high) , being used for complicated surface has more advantage;
4) the surface loss that EDM treating produces , improve mould life-span 20%;
5) processes an electrode rapidly combining with the CAD/CAM technology , especially, the form is complicated , thin-wall is similar to an electrode.
 
3 adopt quick-cutting to process a mould needing the problem solving
    In the homeland, since the aspect cause such as fund , technology , the quick-cutting applying produce a mould be in the initial stage stage. Return the machine tool , cutter , handicraft back to existence as well as some problem of aspect needs to proceed orderly other solve.
The shortcoming is that finished cost is high, correct cutter sigmatism have comparatively high demand, can not have used big cutters , need to have the complicated computer programming technology to be used for support , equipment running cost height.
 
Two, the high speed processing a mould's processes a machine tool
 
    Mould finish machining and hard cutting treating require that the numerical control high-speed machine tool , form board , model put up the precision processing need , high-effect numerical control machine tool etc.The mould aiming at produces a lot of machine tool enterprise , some treating centres 60% all above of the machine tool producing a factory sells enterprise to a mould.
    The fixed assets having 5 billion yuan without exception in the upcoming several years throws into mould industry , 80% is the machine tool buying a mould process equipment , just saying every year having 4 billion yuan of RMB to buy Jinqie among them.

At present average our country numerical control machine tool utilization ratio approximately 20%, the high-speed machine tool utilization ratio 3 ~ 5%. Also, mould enterprise has the unit suitable to buy a high-speed machine tool , complies with 6000 ~ 40000 rmp's to have.
 
1 high-speed machine tool technology parameter demands
 
    Process centre chief axis high-power , high rotation rate , satisfied rude finish machining; The finish machining mould wants to need to reach 15000 ~ 20000 rmp like the cutter , the machine tool with minor diameter. Generally, the chief axis rotation rate machine tool under 10000 rpm can carry out rough process and half finish machining , cannot reach the finish machining accuracy;
Have no way to reach 400 the above m/min cutting speed.
 
2 five scrolls of machine tools application increases a trend
 
1) treating route is nimble , the surface form is complicated;
2) treating range is big , the various type mould suitable processes;
3) cuts life-span of condition easy to cut down cutter wear , to raise a cutter;
 
3 the softwares buying CAD/CAM and high-speed machine tools assort
 
On the grounds of the machine tool , major part counting , having several billions U. S. dollar to be used to enter port every year, the electromachining machine tool and the high-speed machine tool need to import.