High speed treatment and contemporary mould are made

36.8 billion dollar, than going up year of growth 33.

5% . But, the mould with low content of our country technology already supply exceeds demand, very major support imports nicety, mixed high-grade pattern. Import a mould every year to exceed 1 billion dollar. Exit exceeds 100 million dollar. Exact pattern precision asks to be in 3 μ of 2 ～ M, the requirement; small-sized mould that large mould needs to satisfy 8000kN to add up to modular force to record model machine needs to satisfy the requirement of diametical 1mm plastic pipe. Current, use high speed cutting to produce a mould to had become the big climate that the mould creates, in abroad a few moulds produce manufacturer, large area of high speed machine tool replaces electric spark machine tool, high speed cutting raised a mould to manufacture efficiency greatly. Machine tool enterprise aims at a mould to produce a business, the 60 ％ above of machine tools of some machining center manufacturer sells a mould to process a business. High speed cutting replaces mould of electric spark finish machining to make an enterprise be used already generally in foreign mould gradually, mould of production of high speed cutting has been become gradually the big climate that the mould creates, raised a mould to produce efficiency and quality greatly. Use high speed cutting to replace electric spark to produce a pattern, can improve efficiency apparently, raise mould precision, service life to grow. 2. High speed treatment makes medium application in the mould 2. The advantage of cutting of 1 high speed: 1) the tall feed of the high rotate speed of cutting tool and machine tool and tall acceleration, raise metallic excision rate greatly; 2) high speed cutting reduces cutting force; 3) high speed heat in metal cutting is major by cut bits to take away, workpiece is calorific little; 4) high speed cutting reduces vibration, improve treatment quality; 2. The benefit that application of treatment of 2 high speed machines at the mould 1) fast rough machining and semifinishing machining, improve treatment efficiency; 2) hard cutting of finish machining of high speed high accuracy replaces smooth full treatment, show quality is high, appearance precision rises, than EDM treatment improves efficiency 50 ％ , reduce handiwork to repair grind; 3) hard cutting treatment shapes finally the surface, raise precision of exterior quality, appearance, (It is exterior surface roughness not only low, and exterior brightness tall) , the treatment that is used at complex surface has an advantage more; 4) the exterior loss that avoids EDM to machine generation, improve mould life 20 ％ ; 5) combinative CAD/CAM technology machines electrode quickly, especially figure is complex, small wall kind electrode. 3. The issue that uses high speed cutting to machine a mould to need to solve is in home, wait for the reason of the respect as a result of capital, technology, cutting of applied high speed produces a mould to still be in primary level. A few problems that return existence machine tool, cutting tool, craft and other side need to be solved stage by stage. Defect is finished cost tall, have higher demand to the use of cutting tool, cannot have used big cutting tool, want to technology of sophisticated computer process designing does support, facility moving cost is high. 1) the machine tool of mould of high speed treatment 2) choice cutting cutting tool 3) sound treatment technology 4) process designing and cutting tool contrail 5) the basis produces the craft test with many condition 2, the high speed that machines a mould machines finish machining of machine tool mould and hard cutting treatment to need machine tool of numerical control high speed, treatment of pattern plate, mould bases needs machine tool of nicety, efficient numerical control to wait. A lot of machine tool enterprises aim at mould production, the 60 ％ above of machine tools of some machining center manufacturer sells a mould the business. A few will all have mould industry year after year henceforth 5 billion yuan fixed assets is devoted, among them 80% it is to buy a mould to machine equipment, that is to say every year 4 billion yuan of RMBs want to buy gold to cut a machine tool. At present the average utilization rate of machine tool of our country numerical control about 20% , the utilization rate of high speed machine tool 5 ％ of 3 ～ . Pattern company also has the unit that comparative to buy high speed machine tool, from 6000 ～ of 40000rmp have. 1. The technical parameter of high speed machine tool asks 1) high-power of machining center main shaft, high rotate speed, satisfy thick finish machining; Finish machining mould should use small diameter cutting tool, the machine tool should achieve 15000 ～ commonly 20000rmp. Normally main shaft rotate speed can undertake rough machining and semifinishing machining in the machine tool under 10000rpm, the precision of short of finish machining; Cannot achieve the cutting rate of 400m/min above. 2) the distinction of company of the general requirement of fast feed and car, aircraft; Fast feed 30 ～ 60m/min. 3) according to mould production phyletic choice stands, horizontal machining center or dragon door type machining center; 4) the high speed that has had controls a system: Control of control of the look up before high accuracy interpolation, outline, position of tall acceleration, high accuracy; Accordingly, the machine tool that chooses high speed to machine a mould must consider particular manufacturing case. 2. The application of 5 axes machine tool increases a current 1) treatment course is agile, exterior figure is complex; 2) size range of pipe bent is big, suit a variety of type moulds to machine; 3) cutting condition is good, reduce cutting tool to wear away, improve cutting tool life; 4) be aimed at mould type, choice job table or milling head type 5 axes machine tool. 5) bull machine tool and head of much report main shaft are OK better enlarge size range of pipe bent. 3. Buy CAD/CAM software and form a complete set of high speed machine tool to occupy statistic, every year a few dollars are used at importing a machine tool, major report machines machine tool and entrance of need of high speed machine tool. 3, the cutting tool that the treatment of cutting of high speed of cutting tool technology of mould of high speed cutting still requires to deploy cutting of appropriate high speed. High speed machined the progress of cutting tool material to make the progress that high speed machines. Cutting tool of hard alloy coating, get together brilliant enhances cutting tool of pottery and porcelain to make give attention to two or morethings tall the matrix of the edge ministry of hardness and tall tenacity becomes a possibility. Get together nitrogen of brilliant cubic metre changes boron (PCBN) razor blade, its hardness can amount to 3500 ～ 4500HV. Get together brilliant diamond (PCD) its hardness can amount to 6000 ～ 10000HV. In recent years 3 water chestnut of German SCS, Japan (divine steel) reach friendly, Switzerland Shanteweike, United States agrees the company of foreign famous cutting tool such as Na Feishuo rolled out cutting tool of respective high speed cutting early or late, cutting of not only high speed is common the cutting tool of structural steel, the cutting tool of pottery and porcelain that still has hard steel of temper by dipping in water of cutting of can direct high speed exceed strong cutting tool, especially a new force suddenly rises of coating cutting tool, tremendous effect is being produced in the semifinishing machining of hard steel of temper by dipping in water and finish machining. The occurrence of material of new cutting tool and cutting tool technology has made high speed machines the bottleneck problem that go up to be able to appear on cutting tool no longer. But, the high price that imports cutting tool also the main factor of mould of cutting of block up high speed. Generally speaking, cutting tool and the acceleration that the knife places achieve 3g above, the radial of cutting tool is jumpy should be less than 0.

015mm, and the length of the knife cannot be more than the cutting tool diameter of 4 times. According to the actual count of SANDVIK company, titanium is changed in use carbon nitrogen (the integral hard alloy of TICN) coating establishs milling cutter (when 58HRC) undertakes high speed milling, linear velocity of rough machining cutting tool is 100m/min about, and when finish machining and superfinishing, its linear velocity exceeded 280m/min. Such material to cutting tool (include hardness, tenacity, red rigid (cutting property holds below high temperature condition) ) , the appearance of cutting tool (include to discharge precision of bits function, surface, dynamic balancing the gender) and cutting tool life has very high demand. According to the experience of finish machining of domestic mould high speed, when using milling cutter of head of small diameter ball to have mould precision work, linear velocity exceeded 400 ～ 800m/min. The precision work of mould of machine tool hard cutting that chooses enough high rate. Delcam is used 0.

The cutting tool treatment of 8mm diameter is narrow groove, rotate speed 40000rpm, 0.

1mm deepness, feed speed 30m/min. .

1. The treatment target with different basis is reasonable choose cutting tool: CBN and cutting tool of cutting tool of hard alloy coating, diamond agglomeration layer. Use milling cutter of head of small diameter ball to have mould outside precision work; The introductory TiAIN according to Millstar company (aluminous nitrogen changes titanium) it is good as a result of lubricant condition to exceed cutting tool of coating of fine grain hard alloy, than (it is better that cutting tool of coating of TiCN) hard alloy fights abrasiveness. Cutting mould steel. 2. Choose cutting tool parameter, wait like cutting tool of the horn before losing. Cutting tool requirement asks to fight concussion than common treatment tenacity is taller, still ask heatproof concussion capability is strong; 3. Adopt a variety of methods to improve cutting tool life, reduce cutting tool cost. 4. Use high speed knife handle, application is at present most is HSK knife handle, hot press fitting places cutting tool. Notice cutting tool installs the integral dynamic balancing after clip; 5. Current tool industry was solving respect of technology of cutting tool of high speed cutting to had done a lot of works, the cutting tool that faces treatment serves meeting help to solve a lot of problems, cutting tool produces manufacturer to make principal part, referenced cutting tool produces the technical parameter that manufacturer offers. 4, the engineering technology that improves efficiency of mould of high speed cutting 1. The choice of cutting tool diameter and length 2. The choice of HSM and EDM 3. Dry cutting and lubricant refrigeration 4. Feed choice: Normally diameter of feed < milling cutter 10 ％ , diameter of milling cutter of feed width < 40 ％ . It is better that according to material circumstance logical choice machines milling of high speed of craft parameter abroad to machine hardware data quality, material quality standard is same, processability can be stabler; And the cutting tool that foreign company manufactures also is do a test with their data standard; Commendatory treatment parameter fits their criterion quite commonly, if use their cutting tool, have certain distinction character with spare parts material of home, when high speed milling, this differentia is not behaved relatively apparently, some parameter can apply directly, but some effects are poorer. And domestic company chooses spare parts material to have certain level character commonly, uses hardware data, the spare parts material that can process with high speed especially is qualitative, general meeting confine is inside limits of certain part data, this applied high speed processing technique to also offer advantageous condition to us, can apply inside less treatment material scope. What should emphasize here is, must choose on these material optimize the treatment craft parameter that gives to fit this business, and bring into industry standard. Choose homebred cutting tool, have the technical parameter that recommends high speed milling rarely, be necessary to do a test, obtain more satisfactory parameter, had better choose fixed cutting tool to produce manufacturer, reduce the number of the experiment, form processing technique standard, can raise equipment to have effect utilization rate so, reduce manufacturing cost, can obtain better economic benefits. 5, the method of treatment cutting tool of high speed cutting and process designing 1) planar feed method chooses 2) outline treatment method chooses 3) maintain cutting load is smooth 4) the feed that keeps relatively smooth and feed speed 5) garden corner holds in planar cutting 6) logical choice: 1) the milling that avoids corner as far as possible moves; 2) the feed outside shunning work as far as possible and the motion that retreat a knife, enter next deepness from outline directly. Perhaps use corkscrewed yarn or inclined cut to feed; 3) constant every blade feed, improve quality, prolong cutting tool life; 4) outline treatment maintains in horizontal classy. Software of CAM of high speed cutting: Delcam company began high speed cutting to machine the research of process designing technology a few years ago, developed high speed cutting module of software of automatic process designing; Recently, masterCAM company also developed high speed cutting module of software of automatic process designing; Er of domestic northing sea also is developing high speed cutting module of software of automatic process designing; 6, the characteristic of system of numerical control of high speed machine tool 1) high speed data processing 2) corner forecasts processing 3) curve of interpolation of batten of NURBS blame rational is machined 7, the safe problem of mould of high speed cutting 1) cutting tool wears away to be monitored with what destroy; 2) bit connective intensity; 3) with general accuracy machine tool treatment differs, the to machine tool and cutting tool close check before safety defends and switching on the mobile phone is very serious. 8, the issue that at present our country is using high speed to machine the existence in mould technology 1, machine tool: 1) function of whole of machine tool of homebred high speed still has difference, functional component function still cannot satisfy a requirement. Include the power of electric main shaft and rotate speed, price of entrance machine tool is high; 2) dynamic and characteristic research is inadequate still below the high speed of the machine tool, affect overall performance consequently; 3) 5 axes machine tool is not quite mature still, price of entrance machine tool is too high; 4) technology of form a complete set and facility are not complete still. 2. Cutting tool: 1) the application that homebred cutting tool still cannot get used to high speed cutting quite, especially light of high speed hard cutting makes treatment. Price of entrance cutting tool is high. Cutting tool technology is a when affect high speed cutting to machine a mould main factor. 2) technology of form a complete set is insufficient still, include knife handle, whole set online dynamic balancing. 3. Engineering technology of treatment of high speed mould and experiment 1) the history that machines a mould as a result of high speed is shorter, devoid application experience is accumulated; 2) less to research of technology of high speed cutting, devoted and insufficient, project approving is more difficult; 3) lack database of high speed cutting or manual, still be blank at present; 4) mould production manufacturer is insufficient to the understanding of high speed cutting, the analysis that lacks long-term benefit is comparative; 4. Cutting of devoid high speed is automatic process designing software; 5. Lack cutting of high speed of 5 axes linkage software of CAM of automatic process designing. Market of last word mould has strong demand to high speed treatment, but the technology does not follow to go up. Start late, the foundation is poorer, integral technology level is not high, progress is slow. Need each respects to coordinate development, produce learn to grind union, increase investment, use each field force integratedly to drive high speed cutting to make medium application in the mould. We hope, pass the effort of each respect, in market demand drive below, progress through the technology, like car, machine tool, home appliance, be in not far in the future, our country not only should become a mould to produce big country, and should become a mould to produce power. CNC Milling CNC Machining