Enclothe outside pull the process designing that extends a pattern and treatment

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Choose relevant treatment way scientificly, undertake the numerical control process designing of mould treatment reasonably, the product quality that improves a mould apparently, shorten production cycle, and to making cost (be like cutting tool use up, of machine tool precision maintain etc) also have be benefited directly. A mould is enclothed to affecting the exterior quality of ultimate car product directly outside the car, how assure quality through sound to program and the choice that machine a method, improve quality, the field is being created in the mould is the key difficulty that needs ceaseless innovation to rise. A mould is enclothed to include ala of integral side wall, door, around outside the car child board, engine cover, coping, hind mould of boot, side wall, among them mould of integral side wall is treatment of more difficult process designing, also be process designing representative pattern is had most in treatment. The article pulls the choice that delays a model to be a process designing that a mould enclothes outside discussing a car and treatment means with integral side wall. Train of thought of integral process designing to large the rough machining that pulls the numerical control process designing that extends a pattern, the issue that wants a consideration above all is the premise that allows in condition of machine tool cutting below, most metallic mental allowance is excised inside the shortest time. Numerical control process designing machines parameter (basically include what process designing machines rotate speed of means, main shaft and feed to match, the step, option that cuts deep, cutting tool) logical choice, arrange parameter of mill rough machining reasonably especially, can assure to machine efficiency not only, still can the cost of managing cutting tool, improve treatment efficiency. To rough machining, what must combine the past before process designing is small-sized model the range is sophisticated the CNC Machining experience of the mould, have divisional treatment, and should adopt the process designing method that photographs of a variety of rough machining means combine undertake rough machining. Semifinishing machining does not involve issue of the mark that receive a knife, can consider to machining feasibility and the premise that assure to machine efficiency to issue aleatoric and divisional process designing to machine only so. When semifinishing machining process designing, because of process designing means different, the algorithm when method of computational cutting tool is different also, means of certain process designing is met in local incomplete allowance bigger, consider pair of impacts that quality and precision machine when finish machining, be necessary to weave local filling knife program. Finish machining means and the choice that machine parameter affect mould surface quality and the following product to make cycle directly. The author thinks to should cost a few process designing and handling time to make sure the surface of the mould machines quality more in early days, because process designing means and treatment problem make technology of short of of mould surface quality asks,avoid thereby and rely on benchwork to repair grind. Hypostatic to the mould structure and the analysis that machine digital-to-analogue pursue the 1 substance that is punch of side wall of a whole, its machine digital-to-analogue to see a picture 2. Before treatment, digital-to-analogue and hypostatic coordinate fasten unified, makings thick it is special that all sorts of information such as the or so share that reachs direction, side wall admit really important, can avoid to cause inestimable loss because of a few elementary mistakes so. Graph punch of 1 whole side wall pursues digital-to-analogue of treatment of 2 whole side wall if process designing software and modelling software are different, the problem also may appear in data transmission process. In the process that we machine digital-to-analogue in CATIA and DELCAM software changeover, can appear sometimes redundant and face of music of bad clipping, aperture, across, leakage, petty the data changeover that the inaccuracy such as broken face decides, these won't produce an effect to general pattern, but to outside enclothing an effect that plays the exterior quality that extends a pattern is however those who comparative big, accordingly, weaving comprehensive and meticulous inspection must be made before the program, undertake a few have the processing of specific aim at the same time. The side wall of work out whole of rough machining program pulls those who extend a pattern model face size range of pipe bent is bigger, use the cutting tool treatment with the CNC Milling with good tigidity and big diameter to contrast economy so, and can assure to machine efficiency. Be in our country, element of not equal uncertainty affects the restriction that accepts cast semifinished product to make a standard and semifinished product surplus, we are returned cannot enough well reasonable choose profile modeling milling cutter to undertake model the rough machining of the face. Current the current situation, we choose D50mm or the ball head cutting tool of D40 weaves in the light of different area the program of different treatment means undertakes rough machining, be in actual production or contrast economy. 1, the semifinished product that outline of program of outline rough machining handles may be right life of rough machining cutting tool produces an effect, become especially cutting tool by when going up to move downward, have cutting tool perpendicular the athletic trend that cuts semifinished product, it is so before rough machining, assure through trying a knife to check an order model below the premise that face treatment comes out, must rough machining outline, or finish machining reachs the designated position. 2, the local treatment program before waiting for tall rough machining and those who wait for punch of program of tall rough machining all around abrupter, use commonly wait for treatment of means of tall rough machining, but in local still have those who compare evenness model face. Through the graph the local treatment program of 3 is mixed graph of 4 it is local and OK to wait for expensive program see, software is simple processing evenness face only when the tall treatment means such as computation, if do not undertake local processing, the meeting when treatment increases suddenly because of quantity of cutting of local cutting tool and cause accident of cutting tool happening, the local parallel before waiting for tall rough machining so, three-dimensional slant the process designing processing such as buy is particularly necessary. Graph programme diagram of 3 local treatment 4 wait for expensive program local the defect that waits for expensive program treatment is to carry knife time is much, if cutting tool method pursues 5, but carrying between the knife if use,flit quickly, negligible because carry knife and the time that delay, its advantage is to be able to make sure every treatment contrail is in same height, by go up to next treatment that chase a layer, relatively lesser to the injury of cutting tool and machine tool, when treatment safer, smooth. Graph the 5 cutting tool method that wait for expensive program 3, three-dimensional slant the 3 place among buy rough machining are abrupt area with three-dimensional slant place manner is machined (graph 6) , defect is unwarrantable every treatment contrail is in same height, the advantage is to carry knife frequency decreases substantially. Graph 6 three-dimensional slant buy rough machining is become with three-dimensional slant buy is replaced etc tall when, must microscope is three-dimensional slant the contrail that whether buy cutter track has tendency of the motion that plunge into a knife exists, if exist, must change referenced line or border, recount program, make knife collapse blade very easily when CNC Machining otherwise. 4, after abrupt area processing finishs parallel rough machining, begin to weave coping evenness face handles an order, can use means of parallel rough machining (graph 7) , even area divides a layer to undertake drawing style clear root and travel cut treatment by the means of different allowance. Graph 7 parallel rough machining use treatment of knife of D50mm ball head because of rough machining, half essence uses treatment of knife of D30mm ball head, want to use clear root of D40 cutting tool after rough machining so, the hollow that clear root means is in according to clear root rate option odd pen or much pen. The clear root before the work out semifinishing machining of semifinishing machining program (graph 8) is very necessary, additional, accept the restriction of cutting tool, clear root program presses standard cutting tool extend length partition, the does not collide to be cut nevertheless angle when numerical control giving out to be machined actually in the meantime is necessary. Concrete move is as follows: Clear root of much pen of knife of head of ball of work out D30; Clear root of odd pen of knife of head of ball of work out D30; Clear root of much pen of knife of head of ball of work out D20; Of knife of head of ball of work out D30 model face semifinishing machining program (if cutting tool method pursues 9) . Graph 8 clear root programme diagram the process designing move of the precision work of process of precision work of staff of cutting tool method of program of 9 semifinishing machining is as follows: Clear root of odd pen of knife of head of ball of work out D16; Clear root of much pen of knife of head of ball of work out D10; The semifinishing machining before finish machining of knife of head of ball of work out D30; Program of filling knife of knife of head of ball of work out D30; Program of finish machining of knife of head of ball of work out D30 (cutting tool method sees a picture 10) . Graph the side edge of cutting tool of finish machining of cutting tool method of 10 finish machining is easy wear away and there is appearance letting a knife in machining a process, abrupt face surplus is largish, had worn away to avoid finish machining bit fast, in abrupt face need joins those who leave surplus to fill knife program. The first plan of filling knife program is to use three-dimensional slant place manner by on to below as far as possible in order to arrange mill means undertakes, the 2nd plan cuts filling knife all right. In be machined actually, those who be like case of one party is three-dimensional slant program of buy filling knife has go against mill, or because of cutting tool had extended grow and bring about local had had when cutting a phenomenon, should use the 2nd plan to cut filling knife all right. Using three-dimensional slant when program of buy staff filling sword, should special attention the following: □ uses process designing of suitable mill means as far as possible; □ must make collision inspection, measure a knife to grow, according to experience, when knife of D20 ball head extends favorable balance of trade to cross knife of head of ball of 110mm, D30 to extend favorable balance of trade to cross 145mm, cannot use three-dimensional slant place manner filling knife (the except that go against mill is not had in the program) ; □ clear root reachs the designated position, after the half energy program before finish machining is finished, just can use three-dimensional slant program of buy filling knife. The 2nd plan of filling knife program cuts filling knife to also can have appeared to cut a phenomenon sometimes all right, analysing its reason may be: □ cutting tool has been extended long; □ rotate speed and feed do not match (for example experience parameter: The effect when 6000r/min of rotate speed of knife of D20 ball head, feed is for 6000mm/min is better) ; □ razor blade already wore away, change had appeared to cut when bit. Additional, program of finish machining of side wall punch is the factor with influence surface the most crucial quality, for example of the experience parameter such as tolerancepublic errand, step, rotate speed, feed match to also not allow to ignore. Partition machines the security from the cutting tool when raising cost of precision of machine tool of treatment efficiency, protection, managing cutting tool and rough machining, semifinishing machining (do not make the crucial point) angle consideration, the area that weaving had better differ to slope delay when program of thick, semifinishing machining has partition, utmost ground uses process designing of suitable mill means. Will tell to the punch above, return insufficient typical case with suitable mill means, and expect to be being pressed for the most part circle, model the sunken model with gently face is very applicable however. If pursue the sunken model face of 11, use three-dimensional slant rough machining of buy helix suitable mill, the area of 80% can use treatment of process designing of suitable mill means. This divides an area to undertake rough machining: The gently punish of periphery face two area 1 with 2, intermediate gently place is area 3, area 4 to establish area area. Area 4 can use wait for tall treatment, but also had better use three-dimensional slant buy arranges mill by on to next treatment. Graph rough machining of partition of 11 sunken models of course, leave the way of the first cutting tool that the knife handles to machine program, what need to add to have only first sometimes is statified cutting tool method, the semifinished product that handles next knives measures mill to drop, because circuit cutting is measured,avoid big and make the crucial point. A mould is enclothed to affecting the exterior quality of ultimate car product directly outside summing up a car, choose relevant treatment way scientificly, undertake the numerical control process designing of the mould reasonably, the product quality that improves a mould apparently, shorten production cycle, and to making cost (be like cutting tool use up, of machine tool precision maintain etc) also have be benefited directly. To rough machining, must be united in wedlock before process designing before experience has partition, and answer should adopt the process designing method that photographs of a variety of rough machining means combine; Semifinishing machining can consider to machining feasibility and the premise that assure to machine efficiency to issue aleatoric and divisional process designing to machine only, be necessary to weave when allowance of certain and local incomplete is bigger filling knife program; The Qing Dynasty in finish machining follows, filling knife program is very important, of the experience parameter such as tolerancepublic errand, step, rotate speed, feed match to also not allow to ignore. CNC Milling