New-style mould shapes technology

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Dough modeling of lens of 　 of PMS of steel of mould of makings of lens dough modeling expects mould steel PMS is steel of sclerosis of a kind of separate out effectiveness for a given period of time, have exceedingly good lens face to machine function, good cold hot-working performance, report to machine function and good integrated and mechanical performance. Heat treatment craft is handy, via 85O ± 20 ℃ originally dissolve, ℃ of 5OO ± 1O after ageing treatment, matrix is organization of body of shellfish family name, martensite double appearance, heat treatment is out of shape rate is minor (≤ - O. O5 ％ ) . The section of 15Omm of sectional ≤ Ф or 15Omm of ≤ of pattern plate ply is organized, hardness profile is even, mechanical function: 980MPa of σ S ﹥ , 1200MPa of σ B ﹥ , 5 ﹥ of δ 13% , ψ ﹥ 45% . Apply to production job temperature 300 ℃ left and right sides, use hardness HRC3O - 45, ask all sorts of plastic pattern of tall lens face, high accuracy are provided. PMS lens dough modeling expects mould steel has performance of good nitriding surface aggrandizement. Hardness of the surface after nitrogen changes processing amounts to HV8OO - 1200. PMS steel applies to optical system extensively all sorts of lens, recording and box of video tape inside and outside, phone. All sorts of plastic housing moulds such as lamps and lanterns of radio cassette player, crystal clock, washing machine, car and appearance home appliance. Sort of fast patternmaking technology is fast patternmaking technology is a kind of quick, convenient, practical mould makes a technology. The characteristic of this kind of technology is: Patternmaking is periodic short, craft is simple, easily low, precision and life can satisfy cost of promotion, patternmaking some kind of specific function need, economic integration beneficial result is favorable. Special apply to new product to develop production of test and verify of trial-produce, craft and functional test and verify and much breed small lot. What compete as a result of the market is increasingly intense, the speed that the product changes is accelerated ceaselessly, much breed small lot will make the significant production way of manufacturing industry, below this kind of circumstance, manufacturing industry is made archetypally to the product quickly and make of the mould quickly raised strong demand. Accordingly, fast patternmaking technology presents vibrant development trend. Current, in the fast patternmaking technology that actually medium applying, basically have the following kinds: 1. Be based on the patternmaking method of fast and archetypal technology. This kind of method is to be based on novel disperse ／ to pile up (namely material is cumulative) shape thought, use the stereo smooth solidify, fact that fold a layer agglomeration of electorate of system, laser, three-dimensional print, melt deposit shapes wait for different method, obtain the metallic mould of macrobian life or metalloid low life mould. This kind of method, have a technology inferior, design makes advanced, cost the characteristic such as cycle weak point. 2. Use high speed cutting to machine a mould. Current, the rotate speed of machine tool of high speed cutting that aborning uses extensively is in minutely 1. 5 ～ 2. 50 thousand turn the left and right sides. Use high speed cutting to be able to make machine efficiency to raise 10 times above, can shorten greatly patternmaking time. Via the mould after finish machining of high speed cutting face, need to add polishing to be able to be used slightly only, dispense with a large number of repairing rub polishing time. 3.

Use aluminium alloy material to create plastic pattern. Aluminium alloy material with its weight function of light, cutting conductivity of good, heat conduction is advanced and admirable function, received more and more application in the production of plastic pattern in recent years. Material of use aluminium alloy makes a pattern, can be in shorten patternmaking cycle and reduce cost respect to obtain favorable result. Abroad already had special manufacturer to produce the aluminium alloy data that is used at plastic pattern. With the plastic pattern that aluminium alloy creates, service life can be amounted to 100 thousand times, if model antrum surface undertakes chemical processing, service life can amount to 2O - 3O 10 thousand. 4. Use zincic radical low melting point to contain gold to create a pattern. Make a pattern with alloy of low melting point, have cost cycle of low, patternmaking is short wait for an advantage, method of this kind of patternmaking already had old history, still producing main effect in fast patternmaking technology up to now. Especially method of this kind of patternmaking and photograph of fast and archetypal technology are united in wedlock, use effect is very distinct. Use the fast patternmaking method of alloy of low melting point, special apply to large enclothe a mould and large make what blow model, mould suction model quickly. When be being used at enclothing a mould, it is OK fast production gives sample; 2 it is to be formal die to make a test, can avoid to cause the defect that makes up for hard. Use what alloy of low melting point makes to suck the model, mould that blow model, service life can amount to 50 thousand. Another advantage of method of this kind of patternmaking is the material after the mould discards as useless OK and fused put sb in a very important position. 5. Technology of patternmaking of other and fast figuration. Be like: Crock of epoxy resin mould, spray figuration mould, nitrogen. Epoxy resin sets steel mould to be used at the car to enclothe a mould, industry of our country automobile already had application. Thermal spraying method makes mould pitch, basically use at getting together ammoniac fat is epispastic production, already was in at present get together ammoniac fat industry applies extensively. Nitrogen crock applies on punch mould, can simplify effectively mould structure, improve punch technical properties. The servo of fast cutting tool that the extremely low feed that is used at superprecision leads is controlled in recent years, as a result of the application in optics and accurate project system, the diamond turning that brittleness material is like glass, pottery and porcelain, germanium and vulcanization zinc already caused attention of concerned personage huge. When material of diamond turning brittleness, the cutting of material should maintain can extend state, in order to prevent the damage below material surface. Of general brittleness material can extend condition treatment to be able to use extremely low cutting deepness and feed rate to finish, but as a result of attrition and recoil, special when extremely low feed is led, machine tool coordinate achieves millimeter class to locate precision is very difficult. The attrition force that because Cong Jing chafes,rate of extremely low feed falls is height is nonlinear, because this undertakes imitate design very hard. To compensate the attrition of the machine tool and reactive influence, the design made millimeter precision 3 freedom are spent (DOF) positioner regards servo of fast cutting tool as the orgnaization. This is the tabulator of an independent operation, compare with traditional guide bar and rigid structure photograph, its scope is little, but have tall broadband and high accuracy. The bicron positioner that regards servo of fast cutting tool as the orgnaization and union of controller of motor drive feedback are together, can acquire the big route that has precision of high fixed position. Use CMAC nerve network to control algorithm, can obtain better than algorithm of standard PID control traceability and online memory. The "C" language implementation on the DSP that is a foundation through using PC bus line remembers control, in order to control diamond turning machine tool and bicron positioner. Cast forging die life to grow casting forging die is to be used at the mould on the equipment such as compressor of die forging hammer, attrition, forging roll. Essence of life casts forging die to be used in the country such as Russia and France more general, be in our country to use still is not very wide, current and multi-purpose go up in small-sized v equipment, still remain to develop further in the application of other sphere. Development of institute of Wuhan machine technology casts forging die to already had 20 old histories, this technology personnel thinks mould life prep above is traditional mould, be like next characteristics: The forging die that nicety casts, model groovy follow-up mental allowance only O.

3 ～ 0.

4mm; Others can be not machined; The charge that casts module is only forging the 1 ／ that the 1 ／ 2; of module casts forging die to make amount of labor be traditional pattern only 1.

L of ／ of 5 ～ L.

8, cost drops 5O ％ - utilization rate of steel of mould of 7O ％ ; rises 0.

90 ～ O.

95, reduce mould steel to use up 1 ／ 6; 1 what cast the life of forging die to create a pattern for traditional method.

25 ～ 2.

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