Be based on the application of fictitious production technology of three-dimensional model

Undertake discussing to fictitious production technology, made medium application undertake systematic analysis in mould design to its, the design examination before realizing trial-produce sample, advocate the model is built, CNC Machining is emulated reach a program to optimize. Making is a quite important segment in product production cycle, it is the main process that product function realizes. In process of traditional product development, normally have the aid of finishs the analysis that makes property to the product and evaluation at objective model. Such already take time, arduous, accuracy is poor, cannot seasonable, convenient revise, created the waste of financial capacity and material resources, the design that extended a product makes a process. Fictitious make need not product or the physical implementation of the process that prop up, need to pass an analysis only, build expression of model, visible, data and parameter to change make wait for a method, benefit is arranged with computer tool or assist with produce the project that concern decision-making. Fictitious making is to use IT, emulation technology, computer technology to make an activity to reality, or a kind of when imagine medium person, content, information reachs production process to undertake be emulationed in the round advanced production technology. The potential problem in be being made through fictitious production discovery, adopt precautionary measures before the product is produced actually, obtain a product the target of one-time production success, reduce cost thereby, shorten product development cycle, enhance the competition ability of the product. Fictitious production system basically does not waste resource and energy, also do not produce real product, the design that drafts the product in reality in computer upper mould however, development and production process. The article develops all sorts of technologies in the process and the problem of production respect around new product, basically discussed the applied process of fictitious in fictitious product development production technology. 1 fictitious advocate of the model build fictitious environment to fall advocate the model is a core, can lead to a design for the center with this, make and produce each segment such as management, provide a service for its. Advocate the model is had the structure mixes unified data to distributing or run a system, it is a visible digital product model, the object place that has a representing has all sorts of function and some features, handle design analysis, treatment can collaterally to make, manufacturing organization and attemper a lot of problem that waits for all sorts of manufacturing segment place to be faced with. 1.

Of model of 1 spare parts build a model those who build platform alternative is Pro/ENGINEER system. It is design object in order to design the carapace on the mobile phone. The part that compose builds is three-dimensional the model is shown 1 times like the graph. 1.

On 2 moulds, of lower mould antrum making design part is " mould " consult the source of the spare parts. Design spare parts and consult the relation between the spare parts depends on found consult the method that uses when the spare parts. Assemble consult when the spare parts, can duplicate geometry of design spare parts (incorporate through consulting) to consult spare parts. Below this kind of circumstance, can go to systole application consult spare parts, found unplug model, round horn is mixed use other feature, all these changes won't affect design model. But, all changes in designing a model can be in automatically consult the report in the spare parts comes out. Should be in " mould " in when the job, use consult the geometrical parameter of the model can set the parameter concern between design model and mould. As a result of set this kind of relation, when the change designs a model, any relevant moulds can cast component to be able to be updated, in order to reflect a change that make. Spare parts Phone is generated below this module. The sunken, punch of Prt antrum is like a graph respectively 2, 3 are shown. Graph model of 1 spare parts pursues 2 sunken models pursue 3 punch 2 board model model of antrum fictitious make 2.

Program of 1 numerical control is optimized reach strategy of high speed milling to be finished smoothly to make milling is machined, basically should consider the factor of the following respects when process designing of software of use Master CAM: The cutting load that the cutting load that 1) carries constant carries constant can make cutting cutting tool and work stand steady cutting force, protected cutting tool not only, also improved the exterior quality of workpiece at the same time. Before 2) controls the finish machining in treatment of milling of rudimental height high speed strictly, want to control the size of rudimental height and even rate strictly. For this, step pitch of the deepness that cut a person, side direction should be defined neatly not only when actual process designing, those who make sure cutting is measured is constant, more important is to want to use different treatment strategy according to different area, the different area characteristic that makes pair of parts, adopt different treatment method, assure to machine the consistency of orbit, realize the quality optimization of spare parts surface. The kind of knife of advance and retreat with constant cutting condition, right 3) reachs what reduce cutting tool as far as possible to cut a frequency to wait use suitable mill means, realize constant cutting condition, produce less heat in metal cutting, reduce cutting tool load, decrease eliminate workpiece sclerosis. Get better exterior quality. To opening type outline model antrum area, choose exterior feed, and close outline area is chosen inclined to or helix feed means, cut in local district, avoid to get mill " type cuts workpiece surface, reduce machine tool, cutting tool to shake. It is what reduce cutting tool as far as possible to cut a number, can use cutting of loop, single way, decrease cut a number, obtain relatively stable cutting process. The quickness that 4) reduces cutting tool as far as possible changes direction to ask in the layer, same layer is adept ask introduce circular arc or batten line when smooth curve regards cutter track as orbit transfer join, avoid pointed horn to appear in cutter track contrail, reduce the mutation of acceleration as far as possible, get immediateness constant feed rate, reduce the vibration of the machine tool already, prevent to destroy workpiece surface again. In two the treatment between had better use the means of the knife below helix. 5) undertakes the examination is mixed for safety automatically interfering protective precision, undertake the examination is very important automatically interfering protective. Because be below the premise of high speed treatment,interference will be destroyed workpiece and demolish cutting tool. 6) makes full use of the emulation function of the method of emulation function cutting tool of cutting tool method also is very important, before machine program enters job shops, the person that allow process designing checks an order. The function of desired result of cutting tool method with possible Master CAM. But the whole process of imitate cutting spare parts. In imitate not only can show cutting tool and clamping apparatus, still can check cutting tool and clamping apparatus and by circumstance of the interference of treatment spare parts, collision. Additional, pass knife imitate, OK still the time that treatment of spare parts of appraise cipher out needs. To diameter of 2D cutter track, master CAM still can provide more accurate, direct desired result. It is very useful that 7) optimizes a program to optimize a program, can carry constant the oldest safe rate, and scissors road contrail is cut into parts in designation outline. Sometimes, the meeting in cutting tool method has many cutty linear, walk along a knife to dictate for instance (G01) , or reduplicative takes knife instruction point-blank. Below the premise that assures process designing precision, the program of Master CAM is optimized implement (Filter) will be automatic dictate these to translate into dictates point-blank, or instruction of a circular arc, reduced the length of the program greatly. 2.

2 fictitious CNC Machining can complete the test that needs powerful hardware support before through emulating offerred fictitious environment, not only big political integrity restricted cost: And shortened the design of the product and analysis are periodic, improved workpiece efficiency. Mill of numerical control of high speed of this injection mould machines example: Mould material 40Cr, mould surface surface roughness asks: Ra0.

4 μ M, material hardness 35HRC. Rough machining, semifinishing machining and precision work have on center of high speed CNC Machining. If graph 4(a) place is shown,fall for Master CAM platform, have the cutting tool contrail of treatment of cutting of high speed numerical control and emulation treatment sketch map to injection mould. Pass high speed CNC Machining, raised a mould to make precision not only, and shortened production cycle, improved manufacturing efficiency greatly. By the Phone that Por/E generates. On Prt, lower mould antrum is IGES file through saving carbon of spare parts curved surface, read in Master CAM next take this file. Through the setting of a few parameter, can generate model the CNC Machining method of antrum. Below with sunken model board model fictitious model antrum is Lie, will show the result of fictitious treatment. If pursue,4 are shown. (A) machines method (B) rough machining (C) semifinishing machining (D) finish machining pursues 4 board model model antrum is fictitious machine 3 conclusion 1) the ceaseless progress as processing technique of high speed milling, through choosing reasonable treatment method, optimize treatment parameter, can reduce the to machine tool, cutting tool adverse factor in treatment of high speed milling, improve the life of machine tool, cutting tool, at the same time as a result of the advantage with software distinct oneself, assured the spare parts surface of high quality, improved the treatment efficiency of workpiece. 2) is fictitious production technology will from go up at all the products plan that changes a tradition, production mode. Use fictitious production technology, before people is making in kind, wait to its function and producibility undertake evaluating, reach overall situation thereby best, shorten products plan and production cycle, reduce a product to develop cost, offer a product to answer the ability of vicissitude of the market quickly. CNC Milling