Be based on the mould CNC Machining of CimatronE

CAD/CAM software passes 40 old development, had a lot of relatively mature products domestic and internationally. Cimatron E is the CAD/CAM system software that Israel Cimatron company basically is aimed at mould industry to develop, it is the CAD/CAM software with mould industry at present wide application, this software makes the solution with have better to the design of the mould, treatment. Machining a respect especially, offerred agile 2D and 3D milling strategy. Below with model antrum model is exemple, introduce the Cimatron software application in mould milling process designing. One, craft is analysed and the common step of process designing pursues 1 it is model antrum model, want to undertake to the spare parts craft is analysed above all before process designing, treatment craft affects the treatment quality of the mould and treatment efficiency directly, answer below the premise that because this is in,assures mould treatment precision mature to improve treatment efficiency. The technology measure of in principle is commonly first thick hind essence of life, first advocate hind second, first big hind small, first fiducial hind model antrum. According to basic principle, of this mould machine craft to be roughly " half essence of rough machining → adds clear root of → finish machining → " . 1.

Process designing measure (1) decides treatment is standard. What before the mould is machined, should decide the mould is machined above all is fiducial, namely the origin that we say usually, fiducial and affirmatory hind, all cutter track are with fiducial will move. To regulation (6 surfaces had machined dimension) for semifinished product, we allow treatment radical to determine the central position in semifinished product commonly, of Z direction fiducial and affirmatory the top range in semifinished product, if pursue,1 is shown. (Cutting tool of 2) affirmatory rough machining and make up rough machining cutter track. Rough machining action is the material with major purify, the efficiency that so the mould machines is very big rate is decided by the efficiency place of rough machining. According to the mould model antrum, when the cutting tool of rough machining chooses a principle can big big, can short short, this mould chooses milling cutter of Ф 32R6 round horn. The cutting tool that decided rough machining is about to make up the cutter track of rough machining. The means taking a knife of rough machining has: Parallel mill, annular mill, radiative mill or insert mill to wait, the comparison that we apply commonly is much is annular mill, setting of machine tool parameter is rotate speed 1600r/min, cutting deepness 1mm, feed is 800mm/min. Graph 2 in black line section is cutting tool the course that takes in treatment. (3) semifinishing machining. After general pattern rough machining is finished, must undertake rough machining 2 times, namely the incomplete makings treatment that we often say. Its action is the partial data that purify rough machining goes to without treatment, e.g. corner position, local and tiny position, in order to make sure the mental allowance of finish machining is even, some positions undertake 3 times leaving even sometimes thick or leave 4 times thick, in order to make sure the mental allowance when finish machining is consistent. The knife that what this mould uses is Ф 10R 1 will undertake 2 times leaving thick, if pursue,3 are shown. So to make sure the surplus of finish machining is evener reoccupy Ф 6R1 leaves 3 times thick, if pursue,4 are shown. Nextpage(4) finish machining. Precision work can have after semifinishing machining ends. The treatment strategy of finish machining has a lot of kinds, have wait for the Gao Xi, parallel mill, angle according to curved surface the cloth such as divisional region mill, 3D is apart from mill to wait. According to mould antrum different, chooses treatment way also has each different, for instance abrupter place can be used wait for Gao Xi or set point of view, parallel mill can be used to wait on horizontal, according to particular case finish machining the likelihood should choose a few kinds of way taking a knife, if pursue 5 with the graph 6, applied limitative angle to have precision work. The course restricts angle (like the graph 6 limitation are 45 ° ) , angle is machined to be in only when finish machining the face of 45 ° above or area, also can restrict a treatment the face under 45 ° or area, if pursue 7 with the graph 8 are shown. Precision work is very great to the quality influence of mould antrum surface, must choose when finish machining so reasonable cutting tool and logical way taking a knife, need cooperates to use ability to machine a qualification, beautiful mould with a few kinds of means taking a knife. (5) clear root. After finish machining is over, because local seat finish machining cannot be machined,reach the designated position, so need undertakes clear root is handled. Clear root needs finer than finish machining cutting tool, according to particular case some place also need quiet 3 times two, more even second. Because cutting tool is fine, clear root easy generation is cut too, so need chooses logical treatment way and parameter, if pursue,9 are shown. Nextpage is R1 as a result of local seat round horn.

5, so need uses Ф 3 balls knife has clear root the 2nd times, if pursue,10 are shown. But some place are to use cutting tool to cannot be machined reach the designated position, undertake with respect to need electric spark is machined at this moment, be like the orthogonal position that the graph shows 11 times. 2.

Before imitate is being machined formally must imitate cutter track, cutter track of test and verify is correct, whether to have bump knife and cut a phenomenon too, the time that and reach machines. If imitate result pursues 12 ～ graph is shown 19 times. 2, the NC code that after postposition processing generates NC code to program to end, needs to generate machine tool place to be able to identify with the aftertreatment, NC code can be opened with notebook have an edition, the NC code that the editor ends inputs a machine tool to be able to undertake machining directly. 3, conclusion so far, the process of numerical control process designing of Cimatron E is finished basically, the validity that proves through above example CAD/CAM software is in what can increase an order in effective treatment and security, improve work efficiency. CNC Milling