The CAM of electrode of mould of JH125 connecting rod comes true

Move below 0/Windows2000/WindowsXP environment, since was born 1984, machine a function formidably with its famed at the world. Master CAM provides some CAD module, can compose proposes 2D plan curved surface of form, curve, 3D, 3D is hypostatic. Compose of CAD module graph is built end, method of cutting tool of work out of repass CAM module, change into program of numerical control of level-headed of system of machine tool numerical control through postposition processor finally. The cutting tool way that this software can realize machine tool of cut of numerical control lathe, milling machine, machining center, line is generated, graphical imitate and code of numerical control program are generated. It can create the machine program of 2 numerical control machine tool to 5 axes automatically not only, and can method of simulation cutting tool with machine program of test and verify, through the computer communication interface can lose generated program the person to undertake machining directly in numerical control machine tool. Additional, it is OK still imitate treatment and computational handling time, so OK leave out tries knife process, managing and valuable time, reduce material to use up, in order to raise work efficiency and treatment precision. In the meantime, it is returned very easily with AutoCAD, the other CAD software such as Solidworks realizes data switch, raised versatility greatly thereby. In view of above advantage, we choose Master CAM software to undertake those who machine production transform. 3 craft are analysed 3.

Basis of 1 choice machine tool the appearance characteristic of electrode, choose 3 axes the CNC Milling of three linkage can. Choose CNC Milling of the XK714B that by our country factory of Han Chuan machine tool produces vertical here. Its are main technical parameter is as follows: Control a system: Dimension of mesa of work of SIEMENS 802S system: Workbench of 800mm of width 400mm length is the biggest bearing: Limits of rotate speed of 400kg main shaft: Limits of speed of feed of coordinate of line of each excessive of 40 ～ 3000rpm: 1 ～ 2000mm/min each are linear coordinate moves quickly limits: 8000mm/min 3.

Semifinished product of 2 affirmatory semifinished product chooses forging of rectangle piece red copper, decide according to electrode dimension wool bad dimension is: 42mm of × of 145mm × 54mm. 3.

Lv of take an examination of meantime of knife of choice of 3 choices cutting tool needs treatment face circumstance and site circumstance of reservior of actual cutting tool two respects element. According to wool bad (rectangle piece) with treatment face circumstance, consider at the same time use CNC Milling treatment to did not change knife function automatically, and working procedure wants to center, amount of reason cutting tool as far as possible little. Here, choose the surplus with the cutting tool major purify with a bigger diameter first, reoccupy purify of cutting tool of a small diameter is raw the place that reach (leave) of finish machining surplus, have curved surface precision work with ball knife finally. 3 cutting tool choose as follows: No1: φ 20R4, knife of hard alloy BULL (use at rough machining) ; No2: φ 6R1, knife of hard alloy marvellous BULL (use at half essence to add next) ; No3: φ 4R2, month of hard alloy ball (use at finish machining) . 3.

N of rotate speed of the cutting deepness A with logical choice of parameter of 4 choices cutting, main shaft and feed speed Vf, to assuring to machine quality, reduce finished cost and the import with raise labor productivity to be had important. However the size of the choice of each parameter and cutting tool, surface roughness requirement that machines the surface and workpiece, material is having close relationship character. 3.

4.

A of 1 cutting deepness is in surely really on the machine tool below the condition that workpiece and cutting tool stiffness allow, a is equal to mental allowance, this is a when improve productivity significant step. To assure the treatment precision of the spare parts and watch surface roughness, should leave certain surplus to have precision work commonly. The finish machining surplus of numerical control machine tool is less than general accuracy machine tool slightly. Cut rough machining as far as possible when rough machining overall surplus, choose cutting deepness value to be equal to rough machining surplus to be worth namely. Here the principle falls, decide cutting deepness A, φ 20R4, knife of hard alloy BULL, cutting deepness 0.

3mm; φ 6R1, knife of hard alloy marvellous BULL, cutting deepness 0.

15mm; φ 4R2, knife of hard alloy ball, finish machining the rest of all surplus. 3.

4.

The determines dosage of logical choice cutting principle of N of rotate speed of 2 main shaft and feed speed Vf is: When rough machining, give priority to in order to improve productivity commonly, but also should consider economy and finished cost; When semifinishing machining and finish machining, answer to fall in the premise that assures to machine quality, efficiency of cutting of give attention to two or morethings, economy and finished cost. Particular numerical value should be mixed according to machine tool manual cutting dosage manual, combine experience and decide. φ 20: ? Luo blain  pours curtain of establish of ひ account κ to punish ～ of C=105 of Qu of Yu of  Xing Liang 290m/min, take Vc=150m/min here; N=1000.

Vc/ π .

D=1000.

150/ π .

20=2389r/min, take N=2500r/min here; Check " manual of mechanical technology division " , fz=0 of every tine feed.

13mm/z; Vf=fzZn=0.

2 × of 13 × 2500=650mm/min; Nextpage φ 6: Check " manual of mechanical technology division " , cutting speed Vc=105 ～ 290m/min, take Vc=150m/min here; N=1000.

Vc/ π .

D=1000.

150/ π .

6=7962r/min, take N=3000r/min(here) of top rotate speed; Check " manual of mechanical technology division " , fz=0 of every tine feed.

038 ～ 0.

05mm/z, take Fz=0.

05mm/z; Vf=fzZn=0.

2 × of 05 × 3000=300mm/min; 4 balls of φ knife: Check " manual of mechanical technology division " , ～ of cutting speed Vc=80 120m/min, vf=750mm/min, n=5000r/min; Take Vf=500mm/min here, n=3000r/min. 3.

5 workpiece outfit places this electrode is to want those who use to repair modular hind to repeat, the need when building a model searchs fiducial, should have in the bottom of electrode make an appointment with 5mm to search high stop fiducial (treatment of the need when be being machined for the first time comes out) , when reason is being machined, whole appearance wants to machine, cannot hold clip with the clamping apparatus such as flat-nose pliers, the means that uses backboard then holds clip, two whorl aperture is machined in the back of electrode, use electrode inside 6 horn bolt is fixed go up in a backboard, reoccupy pressing plate is backboard impaction on workbench can. The implementation of 4 CAM 4.

The sets CAM process the first stage of library of 1 cutting tool sets cutting tool warehouse namely. Manage in cutting tool library implement in the cutting tool that the choice requires below Bencijia, listed in cutting tool list of current cutting tool benevolence want parameter, include total sword its use diameter of type of name of number of its amount and indication cutting tool amount, cutting tool, cutting tool, cutting tool, cutting tool and knife circumstance. Amid still can choose to build cutting tool command to build from inside right key menu define cutting tool oneself. 4.

Because the choice of group of 2 treatment model is treatment of numerical control milling, change knife time to decrease, in using cutting tool part, the law differentiates working procedure. Because belong to treatment of common curved surface, reason selects group of model of 3 axes linkage can. 4.

2.

Place is machined certainly first before knife of BULL of hard alloy of 20R4 of 1 φ is choosing to process modular form. Because this electrode is to want those who use to repeat, when building a model, electrode should machine azimuth to agree with first time in the azimuth on the machine tool, need searchs fiducial, reason wants put apart to make an appointment with 5mm in electrode bottom when high rectangular chance to extricateoneself from an awkward position serves as long model search fiducial. Use planar ConTOUR TOOLPATHS... modular group. When march face rough machining, because use the BULL knife that is φ 20R4, and semifinished product is one rectangle, cutting tool is OK one knife excises the surplus of the appearance. Reason can choose SURFACE ROUGH ROUGH ConTOUR TOOLPATHS... modular group. The surplus of ministry of the costal region in machining a process will be very large, can be in the upside of costal region ministry surplus take out before curved surface is machined, a rectangular draw a frame round adds on the graph, use POCKET TOOLPATHS... modular group. 4.

2.

Knife of marvellous BULL of hard alloy of 6R1 of 2 φ the surplus that the main purpose of this knife is the place that knife of purify φ 20R4 BULL did not machine, use SURFACE FINISH, FINISH ConTOUR TOOLPATHS... modular group. 4.

2.

Knife of ball of hard alloy of 4R2 of 3 φ this knife is to have precision work, receive the final measure of electrode and form, choose SURFACE FINISH, FINISH PARALLEL TOOLPATHS... modular group. 4.

The setting of parameter of 3 main treatment uses any methods to generate cutting tool method to need to define parameter of cutting tool geometry and cutting parameter carefully, bencijia is versed in if the watch is shown 1 times,parameter is installed. Express 1 cutting to machine parameter to express 4.

The processing mental allowance of 4 mental allowance is to show treatment process is medium, the metallic layer ply that cuts. Surplus has the branch of operation allowance and mental allowance. Operation allowance is photograph adjacent the difference of the working procedure dimension of two working procedure; Mental allowance is the devises measure difference of semifinished product dimension and part drawing, it is equal to the sum of each operation allowance. We use CAD/CAM software, be in constructive when what get normally is final part drawing, reason machines working procedure to, we pay close attention to total surplus more. The method of affirmatory total surplus has a lot of, if analyse way of numeration, experience, check a watch to amend a law to wait, here no longer give uncecessary details. Already found total surplus to be △ suppose now, radius of cutting tool of the choice when treatment is R, if,be in in CAM R of radius of set cutting tool, through compensation of cutting tool radius, there is mental allowance after cutting spare parts; But if we are in,R+ △ is the radius set of cutting tool when setting cutting tool parameter, through radius compensation, the meeting after cutting spare parts leaves the mental allowance of △ . Mould treatment is put in the situation that much breed small lot produces, in machining a process need changes a knife for many times. If every time changes a knife to want to revise the cutting tool of numerical control system to compensate a value, compare apparently trival, and make mistake easily. Accordingly, when we are using CAM system to create numerical control program, compensation set is COMPUTER compensation, through controlling CAM system medium cutting tool radius controls the surplus in treatment. Such cutting tool that can press make choice of when treatment undertake machining directly, and the cutting tool parameter in needing logarithm to control a system makes any modification. This electrode material is red copper, to cutting tool wear away very small, and every time the treatment craft of electrode is relatively fixed, it is machine on CNC Milling, reason can not use cutting tool radius to amend a statement in the program, differ through set directly the purpose that value of cutting tool radius will come to to achieve control mental allowance. When the 20R4 that use φ undertakes rough machining, in CAM diameter of setting cutting tool is φ 21R4, such, can stay on treatment face about 0.

The mental allowance of 5mm. When the 6R1 that use φ is machined, because issue a knife to be ball knife, surplus is very small, 7 ° exist on electrode at the same time unplug modular rake, do not leave surplus when CAM writes machine program so, and after pair of knives are being used when be being machined actually, raise cutting tool 0.

5mm will get leaving the mental allowance of one working procedure. 4.

Of method of 5 cutting tool if pursue,make way of cutting tool of Nextpage thick finish machining 2 ～ graph is shown 6 times. Graph method of 2 chamfer cutting tool pursues method of cutting tool of rough machining of appearance of 3 curved surface pursues method of cutting tool of finish machining of appearance of 4 curved surface pursues method of cutting tool of finish machining of milling of parallel of 5 curved surface pursues 6 workpiece 4.

Cent of system of Master CAM of 6 postposition processing gives priority to processing program and postposition processing program two much. The control system that uses as a result of all sorts of machine tools is different, its machine program dictates code and pattern are different, adoption postposition handles a program to also differ somewhat. Master CAM itself was offerred amount to more than kinds of 180 postposition to handle an order, but the postposition that this software did not provide SINUMERIK 802S system handles an order, generated NC code cannot apply at the CNC Milling of the factory directly, still need to do many modification artificially, both neither is convenient easy make mistake. Accordingly, we developed special postposition to handle an order to SINUMERIK 802S system, play gives the optimal effect of Master CAM software. Because be CNC Milling treatment, do not have change knife function automatically, so each model constituent does not undertake postposition is handled (differentiate by cutting tool) , create corresponding machine program. When CNC Machining, according to craft order, choose corresponding cutting tool and machine program to be able to finish a spare parts to machine a process. The mould electrode passages through which vital energy circulates that 5 application effect uses this CAM technology to produce develops what treatment gets to forging mould, forging not only the measure of connecting rod spare parts that give accords with manufacturer technology requirement, and forging shell is beautiful, weight error is in ± 10g less than. Use this new technology, some forgings every months of output is in the factory 100 thousand above, brought considerable economic benefits for the factory. CNC Milling