高精密齒輪加工的作用及種類:高精密齒輪加工的作用及種類1.高精密齒輪的主要生產加工表面有軸頸和齒輪標準表面，后面一種東莞市永滔高精密齒輪加工包括帶孔齒輪的標準孔、高精密齒輪加工時的機器設備內孔，及其用于找正齒坯方向或精l確測量齒厚時作為精l確測量標準的齒頂圓上。2．高精密齒輪的原材料和毛坯高精密齒輪加工常見的高精密齒輪原材料有15鋼、45鋼等炭素結構鋼；速率高、支承大、的高精密齒輪常見鋁合金結構鋼，如20Cr，40Cr，38CrMoAl，20CrMnTiA等。高精密齒輪的毛坯決策于齒輪的原材料、結構樣子、限度規范、應用標準及生產大批量等因素，常見的有圓棒、煅造毛坯、鑄鋼件或生鐵毛坯等。高精密齒輪的功能及種類高精密齒輪的傳動是機械制造的主要構成，具備傳送驅動力、調速調速功能。高精密齒輪的種類：按齒輪傳動軸線的互相方向可分成三類——平行面軸線傳動、交點軸線傳動和交疊軸線傳動。平行面軸線傳動的齒輪有直齒圓柱體齒輪、斜齒圓柱體齒輪、人字形齒圓柱體齒輪。

齒輪的歸類齒輪可按齒形、齒輪外觀設計、齒線樣子、傳動齒輪所屬的表面和生產制造方式等歸類。齒輪的齒形包含齒廓曲線圖、壓力角、齒高和變位。漸開線齒輪很容易生產制造，精密齒輪加工廠，因而當代應用的齒輪中，漸開線齒輪占絕l對大部分，而旋輪線齒輪和弧形齒輪運用偏少。在壓力角層面，小壓力角齒輪的承載力較小；而大壓力角齒輪，小齒輪加工，盡管承載力較高，但在傳送轉距同樣的狀況下滾動軸承的負載擴大，因而僅用以狀況。而齒輪的齒高已規范化，一般均選用規范齒高。變位齒輪的優勢較多，已遍布各種工業設備中。

小齒(chi)輪件的(de)成形工藝及模具設計

1引言(yan)冷擠(ji)(ji)壓(ya)技(ji)術是(shi)一(yi)種高精(jing)、、低(di)耗的(de)(de)(de)(de)生產工(gong)(gong)(gong)藝技(ji)術，是(shi)零(ling)件(jian)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)加工(gong)(gong)(gong)的(de)(de)(de)(de)主要(yao)方法之一(yi)。而齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)和(he)花鍵(jian)形(xing)(xing)(xing)狀(zhuang)復雜，尺寸精(jing)度(du)(du)、表(biao)面質量及(ji)綜合機械性能等(deng)(deng)要(yao)求均很(hen)(hen)高，而且常(chang)溫下(xia)金屬的(de)(de)(de)(de)變(bian)(bian)形(xing)(xing)(xing)能力低(di)、流(liu)(liu)動性差，這些原(yuan)因導致鍛造載荷陡增、齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)形(xing)(xing)(xing)型(xing)腔(qiang)角隅充填能力銳減，模具處(chu)于極限(xian)加工(gong)(gong)(gong)狀(zhuang)態，帶來易(yi)磨損(sun)、彈性變(bian)(bian)形(xing)(xing)(xing)嚴重(zhong)、壽命(ming)低(di)等(deng)(deng)弊病(bing)。如(ru)果采用流(liu)(liu)線型(xing)的(de)(de)(de)(de)擠(ji)(ji)壓(ya)過(guo)渡(du)型(xing)腔(qiang)，能改善金屬流(liu)(liu)動的(de)(de)(de)(de)均勻(yun)性，降(jiang)低(di)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)壓(ya)力，提高齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)和(he)花鍵(jian)擠(ji)(ji)壓(ya)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)的(de)(de)(de)(de)精(jing)度(du)(du)。2工(gong)(gong)(gong)藝分析(xi)2．1成(cheng)(cheng)(cheng)形(xing)(xing)(xing)工(gong)(gong)(gong)藝設計圖1為(wei)(wei)小(xiao)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)件(jian)的(de)(de)(de)(de)零(ling)件(jian)圖，材(cai)料(liao)(liao)(liao)為(wei)(wei)40Cr，零(ling)件(jian)一(yi)端(duan)為(wei)(wei)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)，連云(yun)港齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)，另一(yi)端(duan)為(wei)(wei)花鍵(jian)。齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)參數為(wei)(wei)：齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)數Z=8，模數m=1．5，齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)形(xing)(xing)(xing)為(wei)(wei)漸開線，壓(ya)力角口=20°，齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)頂(ding)圓直徑(jing)da=13ram，齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)根圓直徑(jing)df=11 mm，精(jing)度(du)(du)等(deng)(deng)級為(wei)(wei)IT6～IT7。根據對零(ling)件(jian)的(de)(de)(de)(de)分析(xi)得出小(xiao)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)件(jian)的(de)(de)(de)(de)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)工(gong)(gong)(gong)藝方案為(wei)(wei)：精(jing)剪下(xia)料(liao)(liao)(liao)一(yi)擠(ji)(ji)壓(ya)小(xiao)端(duan)一(yi)正擠(ji)(ji)花鍵(jian)-鐓粗一(yi)反(fan)擠(ji)(ji)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)、齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)孔成(cheng)(cheng)(cheng)形(xing)(xing)(xing)一(yi)擠(ji)(ji)臺階一(yi)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)部分精(jing)整(zheng)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)，如(ru)圖2所示。2．2坯(pi)料(liao)(liao)(liao)形(xing)(xing)(xing)狀(zhuang)和(he)尺寸的(de)(de)(de)(de)確定坯(pi)料(liao)(liao)(liao)形(xing)(xing)(xing)狀(zhuang)和(he)尺寸對冷擠(ji)(ji)壓(ya)件(jian)的(de)(de)(de)(de)充填性能和(he)模具壽命(ming)影響很(hen)(hen)大(da)。根據小(xiao)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)件(jian)的(de)(de)(de)(de)形(xing)(xing)(xing)狀(zhuang)特點，同時為(wei)(wei)了便于送料(liao)(liao)(liao)以及(ji)有利于坯(pi)料(liao)(liao)(liao)的(de)(de)(de)(de)定位，故選用圓柱(zhu)形(xing)(xing)(xing)坯(pi)料(liao)(liao)(liao)。毛坯(pi)的(de)(de)(de)(de)體(ti)積(ji)是(shi)根據變(bian)(bian)形(xing)(xing)(xing)前后的(de)(de)(de)(de)體(ti)積(ji)不變(bian)(bian)定律(lv)計算，經計算確定毛坯(pi)直徑(jing)為(wei)(wei)12 mm，長(chang)度(du)(du)為(wei)(wei)27mm。2．3坯(pi)料(liao)(liao)(liao)的(de)(de)(de)(de)軟化處(chu)理(li)小(xiao)齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)件(jian)的(de)(de)(de)(de)材(cai)料(liao)(liao)(liao)為(wei)(wei)40Cr，其供應狀(zhuang)態強度(du)(du)高、變(bian)(bian)形(xing)(xing)(xing)抗力大(da)、塑(su)性較差且有加工(gong)(gong)(gong)硬(ying)化存在。加工(gong)(gong)(gong)前要(yao)對坯(pi)料(liao)(liao)(liao)進行充分的(de)(de)(de)(de)軟化處(chu)理(li)，齒(chi)(chi)(chi)(chi)(chi)(chi)(chi)輪(lun)來圖加工(gong)(gong)(gong)，降(jiang)低(di)變(bian)(bian)形(xing)(xing)(xing)抗力，提高塑(su)性，以滿足(zu)冷擠(ji)(ji)壓(ya)成(cheng)(cheng)(cheng)形(xing)(xing)(xing)工(gong)(gong)(gong)藝。退(tui)火處(chu)理(li)過(guo)程如(ru)圖3所示。經退(tui)火處(chu)理(li)后，材(cai)料(liao)(liao)(liao)硬(ying)度(du)(du)達(da)到150～163HBS。