The graph changes the development way that numerical control process designing is numerical control to program, it is such more to the treatment of large and three-dimensional complex part especially. The figure that the article introduced to use system of UG Ⅱ software to realize complex part CNC Machining changes the common method of process designing technology, believe to also can be the graph below environment of other CAM software to change process designing to carry draw lessons from in all. One, machine tool of foreword numerical control is the efficient automation facility that good according to the work out machine program has machining to workpiece automatically, the quality of numerical control program is the treatment quality that affects numerical control machine tool and the main factor of use efficiency. Technology of numerical control process designing is be born along with what a move in chess or a movement in wushu charges a machine tool and develop the technology that rise, already experienced manual process designing, language up to now automatic process designing develops automatic process designing and image 3 times level. Not quite complex to geometrical appearance simple part, calculation is simple, machine program is not much, use manual process designing to come true more easily, but the part with program complex to appearance or very large amount, manual process designing is hard to be competent. Automatic process designing and photograph of manual process designing compare the language, improve process designing efficiency multiple and even number is decuple, but it must make accurate description and definition to wanting the each geometry system of treatment, and certain and complex geometry graph is described accurately almost hard with the language, in three-dimensional treatment domain more such. Especially the bitter fleabane break out of current CAD technology is exhibited more foil the inelasticity that gives method of this kind of process designing, the picture that then 80 time later period entered 20 centuries to be based on a graph is automatic process designing phase. The part drawing that the graph changes process designing place to need arises by CAD software in CAD/CAM system, need not numerical control process designing person undertake building a model again, process designing person should input necessary craft parameter only, designate area of the reference that be mixed by treatment place, the process gives the treatment way of cutting tool with respect to automatic computation, imitate machines condition, method of indication cutting tool and cutting tool appearance walk along knife contrail with examining, if have a mistake, can amend instantly. Image process designing reduced process designing to make mistake greatly probability, raised process designing efficiency and dependability. The CAD of a collect that UG Ⅱ is company of American Unigraphics Solutions, CAE and CAM assist mechanical design to make a system at the computer of an organic whole. The treatment of UG creates module function extremely strong, it already had 20 to use experience successfully for years in aviation manufacturing industry and mould manufacturing industry, other application software cannot is likened to. Below to in an attempt to shows 1 times model the CNC Machining that antrum spare parts often uses in treatment craft is exemple, change technology of numerical control process designing to have brief solution to the graph of UG/CAM. Graph 1 model antrum model 2, the graph of the characteristic that UG graph changes numerical control process designing and measure CNC Machining changes process designing technology to distinguish the apparent characteristic at technology of process designing of ordinary numerical control is: Waiting for the design that machines a spare parts and treatment process designing is to be based on same of an implementation below CAD/CAM environment, namely the geometrical information that the generation of contrail of CNC Machining cutting tool relies on a product, automatic computation produces the treatment parameter that offers according to the architect and cutting tool information. The graph turns numerical control technology of automatic process designing realized products plan and model of production process information without seam join, can assure the quality of CNC Machining and efficiency effectively. The specific flow block diagram that UG Ⅱ realizes CNC Machining graph to change process designing is shown 2 times like the graph. Graph block diagram of 2 UG/CAM flow this model the CNC Machining of antrum spare parts, basically use numerical control milling. UG/CAM offerred powerful numerical control mill to machine a function. Model after antrum CAD model arises, can use the following measure to come true to treatment designs and produce treatment to operate: (Setting of node of 1) cutting tool and process designing of ordinary numerical control are same, when undertaking the graph changes numerical control process designing, the cutting tool kind that should decide this kinds of treatment uses above all and relevant measure. Mix according to characteristic of spare parts structure in treatment dimension requirement, join the real case of workshop cutting tool, finish model CNC Machining of antrum spare parts chose 8 cutting tool in all, it is respectively: ? The rough machining milling cutter of 16, ? Milling cutter of 16 finish machining, ? 8 milling cutter, ? 4 milling cutter, ? 2 milling cutter, ? 80 dishes of milling cutter, ? Knife of head of ball of 2 broach, R3. Emulation treatment agrees basically with cutting tool parameter and workshop spot, postposition of well and truly test and verify handles the validity of the program. (2) setting avoids the menu that lets parameter be offerred according to the system inputs the control information that processes a process, if it allows to provide the initiative point that begins treatment, the reentry point that machines an end, time at 0 o'clock. The safe plane that can stipulate the cutting tool in machining a process is mobile and the bottom limitation that cutting tool moves are planar. Because rate of motion of numerical control machine tool is rapidder, to assure to machine safety, mobile to cutting tool safe and planar setting is place of 10mm of the surface on the spare parts. (Of means of milling of method of 3) choice cutting selected the quality of milling and efficiency, a variety of cutting methods offerred to be able to offer an alternative in UG/CAM: Move back and forth cutting (Zig-Zag) , one-way cutting (Zig) , one-way belt outline (Zig With Contour) , the outline outside profile modeling (Follow Periphery) , profile modeling spare parts (Follow Part) , outline mill (Profile) , standard drive (Standard Drive) , these cutting can decide different knife course type respectively in the method. The outline outside profile modeling is being used more when spare parts of our treatment antrum (Follow Periphery) method, its knife course is the knife course of successive cutting cutting, already taller cutting efficiency also can maintain cutting stability and treatment quality. (The different characteristic that the treatment characteristic that basis of surplus of 4) choice cutting operates is like semifinishing machining or finish machining, finish machining, the underside of certain part, flank and the different surplus that interfere examination face are numeric, ensure the spare parts machines quality and mature treatment efficiency. (Knife of adjacent of photograph of the cutting tool in 5) affirmatory step pitch and process of span control treatment second span is decision part machines exterior quality and the main factor that machine efficiency, must reasonable collocation, speed of step pitch wide treatment is relative faster but exterior quality is poor, machine speed conversely slow and cutting surface quality is higher, the different characteristic that undertakes craft design Shi Yinggen to occupy treatment is reasonable choose. The height of the percentage that can use diameter of constant, cutting tool, leftover wave crest, means that waits for different method to appoint step pitch changeably and parameter. (6) affirmatory feed and retreat a knife to be in certain and one-way model in mill treatment, feed appears particularly important with the problem that retreat a knife, machine without likely feed course even cannot on the rails. Finalize the design truly according to the technological process of protocol the treatment method of antrum spare parts and operation are as follows: (The surface on 1) essence mill, treatment method uses MILL_FINISH, the operation uses FACING_MILLING; (Appearance of 2) rough machining, treatment method uses MILL_ROUGH, the operation uses PLANAR_PROFILE; (Lumen of 3) rough machining, treatment method uses MILL_ROUGH, the operation uses PLANAR_PROFILE, flank surplus leaves 1 ㎜; (Lumen of 4) finish machining, treatment method uses MILL_FINISH, the operation uses FINSH_FLOOR, does flank surplus stay 0? 1 ㎜; (Bottom of lumen of 5) finish machining is flat, treatment method uses LATHE_FINSH, the operation uses PLANAR_MILL; (6) treatment stops mouth, treatment method uses MILL_FINISH, the operation uses FINISH_WALLS; (7) machines lumen breach, treatment method uses MILL_FINSH, the operation uses CLEANUP_CORNERS; (8) beforehand bore, treatment method uses DRILL_METHOD, the operation uses SPOT_DRILLING; (Appearance of 9) finish machining, treatment method uses MILL_FINISH, the operation uses PLANAR_PROFILE; (Round actor of stage of the protruding outside 10) treatment, treatment method uses MILL_FINSH, the operation uses FINISH_WALLS (after searching an area, the treatment that other one side begins after outfit clip is finished) ; (Collet of 11) purify craft, the surface on treatment, treatment method uses MILL_FINISH, the operation uses FACING_MILLING_AREA; (12) machines lumen, treatment method uses MILL_FINISH, the operation uses PLANAR_MILL. Establishing an operation while also to aforementioned each cutting parameter and other option have a definition, wait like deepness of rate of main shaft rotate speed, feed, cutting, such is in install automatic computation to give frequency taking a knife and way with respect to what machine means by UG Ⅱ basis. 3, it is OK that the Ⅱ of emulation treatment UG of numerical control program machines emulation function imitate of seesaw pattern ground demonstrates material to press data of course of numerical control knife by the process of purify, undertake test and verify to the operation is being processed to what finish before treatment. Graph 3 ～ pursue 5 generate a spare parts to emulate a graph to pass the emulation treatment of UG Ⅱ , pursue among them the 3 emulation after be rough machining of the appearance that finish, graph the 4 emulation after be finish machining of the lumen that finish, graph 5 to finish above the emulation after treatment. Graph 3 appearances rough machining emulates a graph 4 lumen finish machining emulates a graph 5 on exterior treatment is emulated 4, of CNC MachiningNC code generate a course to emulate, model the program tree that course of knife of treatment of antrum spare parts forms finally as follows, if pursue,6 are shown. Graph after the document of cutting tool contrail that part of plan of 6 programs tree processes arises, its are calculated cannot be used on numerical control machine tool directly as a result, because the control system in numerical control machine tool can identify numerical control to dictate only,this is, wait like G code, M code. Arrive to get can the NC that machine tool of drive numerical control works dictates must Dao Weiwen changeover dictates into specific numerical control, undertake an aftertreatment namely. UG/CAM offerred processing technique of two kinds of postposition, it is GPM of graphical aftertreatment module respectively (Graphics Postprocessor Module) with UGPOST postposition processing technique. GPM postposition processing technique is a kind of old-style method, but still have a lot of people using this kind of processing technique. Begin from UG V16, the postposition that offers a kind to be called UGPOST is handled (UG/Post Postprocessor) , UGPOST postposition processing does not need CLSF and MDFG, can use the operation in operating navigation tool to make NC file directly, be based on afore-mentioned advantages of UGPOST postposition processing technique, in production actual lieutenant general replaces GPM postposition processing technique stage by stage. We pass generated knife course the processing of postposition of machine tool of Conquest VMC700 numerical control that finishs by UGPOST to have transition, create the NC program that Conquest VMC700 controller can accept, through computer RS232 serial mouth and machine tool special data interface joins, NC program is transmitted to come machine tool. Generates NC code is below. %N0010G40G17G80G90N0011T01M06N0012G43H01Z100. N0013G54N0014G00Y10.
598S0X- .
267M13N0015G00Z29.
N0016G00Z5.
N0017G41G01Y10.
424Z4.
61F250D11X-1.
712N0018G01Y9.
82Z4.
148X-3.
326N0019G01Y8.
85Z3.
686X-4.
751N0020G01Y7.
57Z3.
224X-5.
906N0021G01Y6.
43Z2.
872X-6.
564N0022G01Y4.
79Z2.
41X-7.
095N0023G01Y3.
071Z1.
948X-7.
222N0024G01Y1.
37Z1.
486X-6.
939N0025G01Y- .
215Z1.
024X-6.
261N0026G01Y-1.
595Z.
562X-5.
228N0027G01Y-2.
69Z.
1X-3.
896N0028G01Y-3.
44Z- .
362X-2.
344N0029G01Y-3.
8Z- .
824X- .
658N0030G01Z-1.
X0.
0? ? ? ? ? ? N1950G03Y-82.
745I7.
J0.
0101.
N1951G00Z29.
N1952G40N1953Z100.
N1954G00Y-82.
745S0X-101.
M13N1955G00Z-21.
75N1956G41G01Z-24.
75F250N1957G03Y-77.
I-4.
J5.
745X-98.
N1958G01Y77.
Z-24.
75N1959G03Y82.
745I-7.
J0.
0X-101.
N1960G00Z29.
N1961G00Z200.
N1962G00Y0.
0X0.
0N1963G40N1964G49Z200.
N1965M02% 5, conclusion is complex model a lot of good point that the graph of face spare parts turns CNC Machining process designing, make the way of a development that means of this kind of process designing makes field of technology of numerical control staff, but should point out this kinds of process designing although means is advanced, but intelligence changes rate not tall, requirement process designing person have the experience that abound and matures to CNC Machining craft, ability work out gives the CNC Machining file of high quality, the intelligence that because this raises existing figure,turns technology of numerical control process designing changes a standard is a when will develop henceforth inevitable trend. CNC Milling
CNC Machining