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火花机铸造

火花机铸造

火花机铸造是一种机械加工设备,主要用于电火花加工。广泛应用在各种金属模具、机械设备的制造中。它是利用浸在工作液中的两极间脉冲放电时产生的电蚀作用蚀除导电材料的特种加工方法,又称放电加工或电蚀加工。

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详情介绍

   火花机铸造是一种机械加工设备,主要用于电火花加工。广泛应用在各种金属模具、机械设备的制造中。它是利用浸在工作液中的两极间脉冲放电时产生的电蚀作用蚀除导电材料的特种加工方法,又称放电加工或电蚀加工。
 
   主要作用
 
   火花(hua)加工(gong)的(de)主要用于加工(gong)具(ju)(ju)有复(fu)杂形状的(de)型(xing)(xing)孔(kong)(kong)和型(xing)(xing)腔(qiang)的(de)模具(ju)(ju)和零(ling)件;加工(gong)各种导电材料,如硬质合(he)金和淬(cui)火钢等(deng);加工(gong)深(shen)细孔(kong)(kong)、异形孔(kong)(kong)、深(shen)槽(cao)、窄缝和切割薄片等(deng);加工(gong)各种成形刀具(ju)(ju)、样板和螺纹环规(gui)等(deng)工(gong)具(ju)(ju)。
火花机铸造
   加工原理
 
   进行电(dian)火花(hua)(hua)加工(gong)(gong)(gong)时,工(gong)(gong)(gong)具(ju)电(dian)极和工(gong)(gong)(gong)件分别接脉冲(chong)电(dian)源的两(liang)极,并(bing)浸入(ru)工(gong)(gong)(gong)作液(ye)中,或将(jiang)工(gong)(gong)(gong)作液(ye)充入(ru)放电(dian)间(jian)隙(xi)。通过间(jian)隙(xi)自动(dong)控(kong)制系统控(kong)制工(gong)(gong)(gong)具(ju)电(dian)极向(xiang)工(gong)(gong)(gong)件进给,当两(liang)电(dian)极间(jian)的间(jian)隙(xi)达到一定(ding)距离时,两(liang)电(dian)极上施(shi)加的脉冲(chong)电(dian)压(ya)将(jiang)工(gong)(gong)(gong)作液(ye)击(ji)穿,产生火花(hua)(hua)放电(dian)。
   在(zai)放(fang)电的(de)微(wei)细通道中(zhong)(zhong)瞬时集中(zhong)(zhong)大量的(de)热能,温度(du)可高达(da)10000℃以上(shang)(shang),压力也有急剧变化(hua),从而使这一(yi)点(dian)工作(zuo)表面(mian)局部微(wei)量的(de)金属材(cai)料立(li)刻熔化(hua)、气化(hua),并爆(bao)炸式地飞溅到工作(zuo)液中(zhong)(zhong),迅(xun)速冷凝,形(xing)成(cheng)固体的(de)金属微(wei)粒,被工作(zuo)液带走(zou)。这时在(zai)工件表面(mian)上(shang)(shang)便留下一(yi)个微(wei)小的(de)凹坑痕迹,放(fang)电短暂停歇,两(liang)电极间工作(zuo)液恢复绝缘状态。
   紧接着(zhe),下一(yi)个(ge)脉冲(chong)电压又在两电极(ji)相(xiang)对接近的(de)(de)另一(yi)点处击(ji)穿,产生火花放电,重(zhong)复上(shang)述(shu)过(guo)程。这样(yang),虽(sui)然每个(ge)脉冲(chong)放电蚀(shi)除(chu)的(de)(de)金属(shu)量极(ji)少,但因每秒有成千上(shang)万次脉冲(chong)放电作用(yong),就能蚀(shi)除(chu)较多的(de)(de)金属(shu),具有一(yi)定的(de)(de)生产率。
   在保(bao)持工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)与工(gong)(gong)(gong)(gong)(gong)件之(zhi)间恒定放电间隙的(de)(de)(de)条件下,一边蚀(shi)除(chu)(chu)工(gong)(gong)(gong)(gong)(gong)件金属,一边使工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)不(bu)断地(di)向工(gong)(gong)(gong)(gong)(gong)件进给,后便加(jia)工(gong)(gong)(gong)(gong)(gong)出与工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)形(xing)状相(xiang)对应(ying)的(de)(de)(de)形(xing)状来(lai)。因此,只要改变工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)的(de)(de)(de)形(xing)状和(he)工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)与工(gong)(gong)(gong)(gong)(gong)件之(zhi)间的(de)(de)(de)相(xiang)对运动方式,就(jiu)能加(jia)工(gong)(gong)(gong)(gong)(gong)出各(ge)种复杂的(de)(de)(de)型面。工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)常用(yong)导电性良好、熔点较高、易加(jia)工(gong)(gong)(gong)(gong)(gong)的(de)(de)(de)耐电蚀(shi)材料(liao),如(ru)铜、石墨(mo)、铜钨合金和(he)钼等。在加(jia)工(gong)(gong)(gong)(gong)(gong)过(guo)程中,工(gong)(gong)(gong)(gong)(gong)具(ju)(ju)(ju)电极(ji)也有(you)损耗(hao),但小(xiao)于(yu)工(gong)(gong)(gong)(gong)(gong)件金属的(de)(de)(de)蚀(shi)除(chu)(chu)量,甚(shen)至接近于(yu)无(wu)损耗(hao)。
火花机铸造
   维修保养
 
   每日保养
   1 火花机工(gong)作台面(mian)保持干净,如不当易引起(qi)台面(mian)生锈。
   2 油泵压(ya)力(li)确认是否正常。
   3 设(she)备外观保持整(zheng)洁。
   每周(zhou)保养
   1 手压式注(zhu)油(you)器注(zhu)油(you),每次压3次。
   2 检查手(shou)压(ya)式注油器油量。
   每月保养(yang)
   1 火(huo)花机各导轨注(zhu)黄(huang)油。
   2 检查磁盘(pan)精(jing)度。(以千分表测(ce)平(ping)面度是(shi)否正确)
   每(mei)季保(bao)养
   1 检查(cha)火(huo)花机水平(ping)是否(fou)(fou)正(zheng)常(chang)。(以水平(ping)仪测工(gong)作台面水平(ping)是否(fou)(fou)正(zheng)确)
   2 检查火花机(ji)三轴精度(du)。(以节矩规测行程是否正确)
   每年保(bao)养
   1 检查并清理火花机油(you)箱。
   2 检查(cha)并(bing)更换(huan)火花机Z轴(zhou)润滑油。(具(ju)体请洽群基服务部(bu))
   3 检查并清(qing)理电(dian)柜(ju)。(具体请洽(qia)群基(ji)服务部)
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