Mix in the light of electrode the mould is medium or small the machine tool utilization rate that respect of spare parts treatment exists generally strength of labor of low, jockey is great and the issue with high finished cost, the article put forward what clip of standardization, fast outfit and combination machine to settle way, undertook test and verify through practice. It is electrode and top, slippery that my company has one to plant among the workpiece of treatment of machine tool of production ministry CNC, set piece kind of small part. Because module is small, the handling time after holding clip is very short, the proportion that the time that hold clip and school air time hold in whole handling time is very large, exceed time of machine tool movement even, and because need what otherwise breaks to undertake discharge, school moves a part installing, change knife and call a program, take up to the time of jockey very big. Accordingly, a when machined utilization rate of CNC machine tool of this kind of module short board. For this, we had systematic research, in the treatment that a few meanses that be placed through standardization, will fast outfit and set treatment use this kind of part, got one carries efficient plan. The top, slippery, application that mounts a small part to machine a principle to go up in treatment of black lead electrode 1. Process of design of black lead electrode, treatment is decomposed (1) the incomplete makings model after electrode designs electrode modelling engineer to be machined according to module CNC designs electrode, give out electrode material is only. The architect decides the electrode measure that the design gives according to his experience. (2) engineer of process designing of electrode of electrode process designing undertakes process designing respectively according to individual electrode modelling. (3) branch of preparation of production of electrode material preparation expects according to electrode supplier of one-way black lead is purchased curium cut black lead to expect or buy big black lead to expect proper motion curiums the size that cuts need. (4) graphite material is gotten with reach electrode to install clip to machine ① material to get partly put in black lead according to program sheet with jockey of black lead machine the graphite material that needs to machine electrode when the class is searched in place. The treatment jockey that the reverse side of ② black lead holds clip position expects black lead to underside is placed in the mill on black lead machine to make the same score underside toward jacket, give EROWA to install the stage that place protruding or crossed chamfer according to needing modelling to machine, this process needs to take up black lead CNC is machined machine. Jockey of installation of ③ clamping apparatus machines the reverse side good electrode material outfit to be on EROWA clamping apparatus. (5) the black lead that treatment of CNC of electrode face figure will hold good clamping apparatus is fixed go up in chuck of EROWA of black lead machine, undertake machining. 2. After the generation of the problem undertakes decomposing to black lead electrode is designed and making a process, we can discover 3 efficiency from which the measure with low, high cost: (1) supplier of black lead of electrode material preparation or in-house need foundation are single outside electrode assist dimension curiums cut raw material, because size of black lead dimension is differ, the platoon expects difficulty is great, bring about curium makings time grows, waste material is much. (2) treatment prepares to plan stage is to search electrode material difficulty above all. Because the supplier offers standards of measurement of the material inside packing box more, jockey is searched not easily, the appearance that incidental fault is taken or takes in disorder. Machine outfit clip to cost next much. (3) the treatment of every electrode should pass treatment measure the cutting tool of sheet of material of the graphite that hold clip, reader, preparation, labor situation that calls program and program to move, be in below the case that does not use knife warehouse from the back 4 labor situation even according to the program more or less does number undertake repeatedly. Nextpage because program run time is opposite shorter, the time that 4 labor situation takes up in front held very large proportion, and when carrying out these labor situations, the machine tool does not undertake machining a movement. And one person much chance mode of operation more drama the demand to jockey manpower, bring about often appear much stage machine tool stops machine wait to change the workpiece, condition that changes a knife to perhaps call a program. 3. Improve measure (1) dimension of fixed means electrode standardizes norms of standardization black lead and electrode: Right before electrode makings sheet undertakes statistic, analysis is mixed Baconian, the dimension that expects black lead according to commonly used electrode size scope undertakes standardizing, form a finite measurement standards standard. Electrode outfit places means standardization: Simplify and standardize electrode to fit clip pattern, electrode rear outfit places a share the means holding clip of the bolt of instead of the means that hold clip from original protruding table or crossed chamfer and pin, it is two kinds of norms according to electrode size standardization. (2) implementation installs clip system quickly and into travel combination treatment passes survey, we introduce Jergens ball to lock up the fast system that hold clip, use the pattern that sets treatment. Match with the dimension of black lead and outfit clip means, we are on clamping apparatus board those who machine a certain number of group correspondence is fixed sell aperture and screw, can place many black lead with fashionable dress thereby. The fixture that at present we designed 3 kinds of norms board, according to the size of the measurement standards of black lead, can hold the black lead that places different amount. 4. Executive effect (1) the design that standard of according to of electrode design engineer expects sheet undertakes electrode, accordingly, electrode expects sheet is basic is standardization. (2) electrode combination arrives when CAM engineer process designing on clamping apparatus board, will one board electrode undertakes process designing as a modelling, efficiency of CAM engineer process designing gets promotion. (3) electrode material preparation and treatment of part of electrode outfit clip close 2 for one, and machine methodological happening change, get the materials ready newly the program turns into: chunk black lead feed mill makes the same score fluctuation two plane, curium give many standard material, use tool to machine screw and sell aperture. Because use batch to produce kind, make the material preparation of every black lead and handling time of part of electrode outfit clip extremely short, machine electrode to hold the time that places a share under original interiorly greatly, and be use treatment of general accuracy machine tool, cost of machine tool unit also compares above of small before in part. (4) outfit clip is fast, machine tool machine down time is short, jockey labor intensity is reduced greatly. (5) will whole board electrode undertakes as a modelling process designing is machined, every lengthen the handling time of the knife, the frequency that change a knife is reduced, actual handling time also happens to drop apparently. The application on small part treatment 1. Top, slippery, set an issue of kind of spare parts treatment analytic top, slippery, set a treatment existence of kind of small part and electrode to machine same question, namely the time that single way processes single work is shorter, attune of outfit clip, school, change knife and the time that call a program to take whole treatment periodic very large proportion. But what differ with treatment of black lead electrode is, the treatment of this kind of spare parts is more sophisticated (the place that be like a graph is shown) , need changes a face through workpiece or often adjust direction of machine tool main shaft to undertake machining. Below normal circumstance, machine to assure to be found easily fiducial, 6 of preform must be machined accurate, and the use that packs clip frequency and auxiliary tool to decrease, often use 5 axes machine tool to have part or full treatment, cause cost to rise. 2. The conception that improves plan and carry out be based on above descriptive characteristic, the train of thought that we are placed from standardization, fast outfit likewise and constitutes treatment will solve top, slippery, set piece treatment efficiency problem, offer the following measure: (1) like black lead electrode, screw and the fixed means that sell aperture are used in workpiece the reverse side, undertake standardizing to the size of pitch and aperture; According to the mould small-sized top, slippery, set piece size scope, undertake standardizing to the dimension of preform. (2) use Jergens ball to lock up the fast system that hold clip, it is on clamping apparatus board according to the standard treatment goes out corresponding screw and sell aperture. (3) can machine to hold clip as far as possible much small part, we designed appropriative but the angle square stand that two sides outfit places. The treatment presence that considers this kind of hardware is various tropism, secure angle square stage the revolving stage in machine tool of horizontal revolving stage coming back to go up. The two sides of angle square stage machines a fiducial ball aperture respectively, can hold clip respectively 4 balls lock up fast outfit to add a system. The treatment of workpiece can spend treatment according to needing to undertake corner, reduce the frequency that hold clip and the use of 5 axial machine tools thereby, because install clip, school to move the error that cause for many times,avoid. 3. Apply the result (1) after using new work to fit clip pattern, treatment affirms fiducially depend on module itself no longer, accordingly, module wants underside mill to make the same score only can. In the meantime, the standardization of preform realized batch to purchase, cost is lower. (2) after use ball locks up the fast system that hold clip can install clip to process many work, the bad news that hold clip is 20min less than with machine tool time, time of air of outfit clip, school drops extremely breathtaking, if outfit places 8 workpiece, every workpiece uses a tradition to machine a method to need the consideration that hold clip twice, 6 what the time that hold clip machines for the tradition. 25% . (3) like black lead process designing, top, slippery, setting a process designing of kind of spare parts also is will whole all workpiece on a clamping apparatus board should do process designing of a modelling. (4) jockey job intensity is reduced greatly, treatment makes mistake probability is reduced. Notable is, the method that uses clamping apparatus board to constitute treatment can machine 5 of workpiece only, to model the technology that the treatment of the face adopts is good 5 treatment work curiums cut redundant craft more than makings, next with move, fixed die pattern plate is set match junior travel face to machine, this kind of practice avoided on one hand model of the face break difference, because remain a program,machine many spare partses on the other hand, can save treatment man-hour substantially. The concept that epilogue is placed through standardization, will fast outfit and combines treatment introduces electrode and top, slippery, in setting a treatment of kind of small part, we solved the problem with machine tool low utilization rate successfully, and reduced the labor intensity of jockey greatly, reduced finished cost. CNC Milling
CNC Machining