淺談焊接操作機點焊發(fa)表時間:2021-01-28 17:06 焊(han)(han)(han)(han)(han)接操(cao)作機點焊(han)(han)(han)(han)(han)是依靠被(bei)焊(han)(han)(han)(han)(han)工件(jian)接觸面之間(jian)形(xing)(xing)成的(de)焊(han)(han)(han)(han)(han)點、將(jiang)工件(jian)連接起來的(de)電阻焊(han)(han)(han)(han)(han)方法(fa)。按一次(ci)形(xing)(xing)成的(de)焊(han)(han)(han)(han)(han)點數,可分(fen)為單(dan)點焊(han)(han)(han)(han)(han)和多(duo)點焊(han)(han)(han)(han)(han);按對焊(han)(han)(han)(han)(han)件(jian)的(de)供電方向,可分(fen)為單(dan)面點焊(han)(han)(han)(han)(han)和雙(shuang)面點焊(han)(han)(han)(han)(han)等。 常見的(de)點焊方(fang)法是雙面點焊(電極從工(gong)件兩(liang)側供電),的(de)場(chang)合。點焊接頭的(de)尺寸可參考表(biao)3.8.1大致確(que)定(ding),常用金屬(shu)材(cai)料的(de)焊接點距見表(biao)3.8.2。 點(dian)焊是(shi)一種高速、經濟(ji)的(de)連接方(fang)法,適(shi)用于制造可裝配成搭(da)接接頭(tou)、接頭(tou)無(wu)密封性要(yao)求的(de)薄板構(gou)件,如汽(qi)車駕(jia)駛(shi)室(shi)、轎(jiao)車車身、 長機機翼、儀表(biao)殼體(ti),也可用于焊接建筑用鋼筋、電器元件引(yin)線、家用電器等。 通用(yong)焊(han)機(ji)可焊(han)接(jie)多種不(bu)同厚度(du)和(he)形狀的工(gong)(gong)(gong)件(jian),專用(yong)焊(han)機(ji)則用(yong)于焊(han)接(jie)形狀、尺(chi)寸、厚度(du)、材(cai)質接(jie)近(jin)的類型的工(gong)(gong)(gong)件(jian)。中大(da)功率焊(han)機(ji)重(zhong)量(liang)大(da),一般都固(gu)定(ding)安裝(zhuang)。小(xiao)型焊(han)接(jie)操作機(ji)外形復雜或尺(chi)寸較大(da)的薄壁工(gong)(gong)(gong)件(jian)時(shi),工(gong)(gong)(gong)件(jian)通常不(bu)動而使焊(han)接(jie)機(ji)(焊(han)鉗)相(xiang)對工(gong)(gong)(gong)件(jian)移動。 絕大多數通用(yong)點(dian)焊機采用(yong)雙面饋電,可(ke)(ke)用(yong)于焊接多種尺寸和(he)形狀、多類金屬材料的(de)工件(jian),通常一次焊接循環(huan)獲得一個(ge)焊點(dian)。單面點(dian)焊可(ke)(ke)提生產率(lv),減小(xiao)焊接變形,并可(ke)(ke)從(cong)單面接近某些可(ke)(ke)達性差(cha)的(de)焊件(jian)。 直壓式焊(han)(han)(han)機(ji)的(de)下(xia)電(dian)極(ji)通常(chang)固(gu)定不動(dong)(dong)(dong),而(er)(er)上電(dian)極(ji)沿垂直方向作直線(xian)運(yun)動(dong)(dong)(dong)。電(dian)極(ji)壓力(li)通過氣(qi)缸或(huo)油缸帶(dai)動(dong)(dong)(dong)電(dian)極(ji)施加(jia)于工件。通用直壓式焊(han)(han)(han)機(ji)大多(duo)數采用氣(qi)動(dong)(dong)(dong)加(jia)壓系統,既能用于點(dian)焊(han)(han)(han)也能用于凸(tu)焊(han)(han)(han)(圖(tu)3.8.12)。點(dian)焊(han)(han)(han)機(ji)的(de)管伸長度(du)一般較大,而(er)(er)凸(tu)焊(han)(han)(han)機(ji)的(de)臂伸長度(du)都很小(因剛度(du)要求高)。此外,焊(han)(han)(han)接機(ji)器人(ren)凸(tu)焊(han)(han)(han)機(ji)要求加(jia)壓機(ji)構的(de)隨(sui)動(dong)(dong)(dong)性要好,因而(er)(er)均采用滾動(dong)(dong)(dong)導軌、小質量(liang)活塞和蝶形彈簧緩沖等措施,以提高電(dian)極(ji)運(yun)動(dong)(dong)(dong)部分的(de)跟(gen)隨(sui)性。 下(xia)一篇淺談焊接滾輪架的組成
|