3R locates standard system is to raise those who machine efficiency to assure quickly

Introduce according to personage of the authority inside course of study, the car pattern company of Euramerican, Japan is compared with industry posture of China, the whole of the mould makes precision be absent same standard, and they are used in the 1/2 that the mould makes the time that attend have Chinese company only or 1/3, the integral competition ability that creates company of Chinese car pattern is compared Euramerican differ with Japan. Current, shorten the manufacturing cycle of the mould uses 3 kinds of method normally: Above all, high speed mill is direction of a development, it can raise the rate of treatment not only, and can machine directly on the material after quench, the precision after treatment and exterior surface roughness are very satisfactory; Next, design and produce a program what use advanced CAD/CAM software to optimize a mould, make handling time shortens; Finally, through improvement cutting tool also can shorten with complementary makings mould treatment is periodic. Above is these new technologies, new the application of equipment, although make the manufacturing condition of car pattern production company is improved greatly, but another issue is even more outstanding however: With quicker and quicker treatment speed photograph is compared, auxiliary handling time appears longer and longer. Car mould produces enterprise aborning to encounter the following problem with respect to classics regular meeting: ● begins in every working procedure before, must search first mould or electrode, wasted many time so, bring about a machine tool to stop machine latency time is very long, utilization rate of equipment and installations is very low; ● mould or electrode search the factitious error in the process cannot be eliminated, the whole that affects a pattern directly machines precision, although equipment precision is very good, but the mould precision after treatment is not tall however; ● searchs to avoid a person to be precision of error influence finish machining, the surplus that often leaves precision work when rough machining is very large, the time that causes precision work is very long, this also is one of main reasons that affect a mould to machine cycle; ● because utilization rate of equipment and installations is low, to raise yield, the common practice of the enterprise is to increase facility amount, the cost that its often are equipment as a result rose, but the crop of the mould still cannot satisfy the market demand that increases increasingly. Be what reason caused afore-mentioned problems after all? Let us treat the form of machine tool workbench first, can know the problem is in. Normally, there is Z only on all sorts of machine tool workbench to fixed position is standard (go up in workbench namely, the surface has 1R only) , and in X, Y on two direction, fiducial without fixed position (lack 2R) . The time with handlers many expenditure will search mould or electrode, its purpose is to establish machine tool and pattern between fiducial (affirmatory 3R) , and every transhipment of through cargo mould or electrode, be about to search, can see from this: Lack between machine tool workbench and mould 3 to fixed position fiducial (lack 3R) it is the main reason that causes afore-mentioned problems. Since workbench of T chamfer type is used extensively, this problem did not get very good settlement all the time. Nextpage to solve this problem, swedish System3R company put forward " 1 minute of transhipment of through cargo " machine new strategy. So called " 1 minute of transhipment of through cargo " , mix in all machine tool workbench namely mould (or electrode) between, build unified, fixed, and it is foregone 3 to fixed position standard system -- 3R standard system. There was 3R standard system on machine tool and mould, both between had fixed connection, make the installation that goes up in the machine tool buckles mould or electrode to close namely, need not hit a watch to search, can begin to machine. Should say, "1 minute of transhipment of through cargo " it is strategy of a kind of brand-new mould treatment technology, it asks to 3R standard system is used in the whole process that machines in the mould, in order to make the interface between all sorts of different machine tools and different pattern is united completely. The repetition that 3R standard system offers less than of 2 μ M at the same time locates precision, such, wh whoever will operate, also without giving thought to transhipment of through cargo how many times, the installation of mould or electrode on the machine tool the position is changeless from beginning to end. Can imagine, if every time the installation fixed position of mould or electrode is one is not differred, we are not making a list completely, do not search production begins instantly below the circumstance, can use at ordinary times auxiliary handling time will have production, can raise the utilization rate of equipment greatly so, shorten greatly thereby the production of the mould is periodic. Come now illustrate this problem. It is with electric spark machine tool exemple, horary man-hour expends 100 ～ 150 yuan. If the enterprise has 10 machine tools, everyday every machine tool searchs 10, search every time time is 20min, work every year 300 days, with this computation, the time that wastes every year is: × of 10 machine tools searchs 10 times × 20 minutes / 300 days of =10000h reduce second × every year from this income: 10000h × 100 yuan (or 150 yuan) company of System 3R of 1.5 million yuan of Sweden puts forward =100 ～ " a minute of transhipment of through cargo " treatment new idea can become many to assist handling time to be significant handling time not only, and can improve treatment efficiency from craft angle, that reduces finish machining surplus namely. In conventional treatment technology, considering material treatment process is out of shape mediumly and the person before finish machining waits for an element to look for correct errors to differ, general to the allowance of finish machining bigger. Because amount of finish machining purify is small, handling time is long, if surplus is too large, criterion finish machining time increases with respect to meeting twice. Had 3R after fixed position is standard, avoided what the person is to look for correct errors to differ, because this is OK, finish machining allowance control is inside very little scope, reduced finish machining time greatly. Afore-mentioned processes are the first situation that uses 3R to improve productivity merely, the whole that raising a pattern machines efficiency respect, 3R standard system still has a lot of latent capacity to be able to be dug. CNC Milling