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模具电加工的优势在哪里?

来源:http://www.sdlqmj.com 日期:2019-03-20 发布人:admin 浏览次数:
现代的模具工厂,不能短少电加工,电加工能够对各类异形、高硬度零件停止加工,它分为线切割与电火花二种。
Modern die factories, can not be short and less EDM, EDM can stop processing all kinds of special-shaped, high hardness parts, it is divided into wire cutting and EDM two kinds.
慢走丝线切割加工精度可达±0.003mm,粗糙度Ra0.2μm。加工开端时,要先检查机床的情况,查看水的去离子度,水温,丝的垂直度,张力等各个要素,确保良好的加工状态。线切割加工是在一整块资料上去除加工,它毁坏了工件原有的应力均衡,很容易惹起应力集中,特别是在拐角处,因而当R<0.2(特别是尖角)时,应向设计部门提出改善倡议。加工中处置应力集中的办法,可运用矢量平移原理,精加工前先留余量1mm左右,预加工出大致外形,然后再停止热处置,让加工应力在精加工前先行释放,保证热稳定性。
The machining accuracy of WEDM with slow-moving wire can reach (+0.003mm) and the roughness Ra 0.2um. At the beginning of processing, check the condition of machine tools, check the deionization of water, water temperature, verticality of silk, tension and other factors to ensure a good processing state. WEDM is a process of removing a whole piece of data. It destroys the original stress balance of the workpiece and easily causes stress concentration, especially at the corner. Therefore, when R < 0.2 (especially at the sharp corner), improvement proposals should be put forward to the design department. Vector translation principle can be used to deal with stress concentration in processing. The remaining amount is about 1 mm before finishing, roughly the shape is pre-processed, and then the thermal treatment is stopped, so that the processing stress can be released before finishing and thermal stability can be guaranteed.
加工凸模时,丝的切入位置及途径的选择要认真思索。采用打孔穿丝加工,效果佳。高精线切割加工,通常切割遍数为四次,能够保证零件质量。当加工带有锥度的凹模时,本着快速高效的立场,遍粗加工直边,第二遍锥度加工,接着再精加工直边,这样可不需停止X段垂直向精加工,只精加工刃口段直边,既节约时间又节约本钱。
When processing punch, the choice of the cut-in position and way of the wire should be carefully considered. The best result is obtained by piercing and threading. High-precision wire cutting, usually four times, can ensure the quality of parts. When processing concave dies with taper, in line with the position of fast and efficient, first roughing straight edge, second taper processing, and then finishing straight edge, so that it does not need to stop X section vertical finishing, only finishing straight edge of edge section, which saves time and cost.
山东模具制造厂家
电火花加工先要制造电极,电极有粗、精之分。精加工电极请求外形契合性好,好用CNC数控机床加工完成。电极的材质选择上,紫铜电极主要用于普通钢件加工。Cu-W合金电极,综合性能好,特别是加工过程中耗费量明显比紫铜小,配合足量的冲刷液,很合适难加工资料加工及截面外形复杂件精加工。制造电极时,需求计算电极的间隙量及电极数量,当停止大面积或重电极加工时,工件和电极装夹要结实,保证具有足够的强度,避免加工松动。停止深台阶加工时,对电极各处的损耗及因排液不畅惹起的电弧放电,要予以留意。
Electrodes must be manufactured before EDM. They are coarse and fine. Fine processing electrodes request good shape fit, preferably with CNC numerical control machine tool processing. In the material selection of electrodes, copper electrodes are mainly used for ordinary steel parts processing. The copper-W alloy electrode has good comprehensive performance, especially the consumption in processing is obviously smaller than that of copper. It is suitable for processing difficult-to-process data and finishing complex parts with cross-sectional shape with sufficient flushing fluid. When making electrodes, it is necessary to calculate the gap between electrodes and the number of electrodes. When large area or heavy electrode processing is stopped, workpieces and electrodes should be clamped firmly to ensure sufficient strength and avoid loosening. When stopping deep step processing, attention should be paid to the loss of electrodes and arc discharge caused by poor drainage.
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