亚洲精品宾馆在线精品酒店_亚洲午夜无码久久久久_欧美精品久久久久久精品爆乳_中文字幕AV人妻互换久久

 　　采用(yong)H250灰口(kou)鑄鐵(tie)制造。工(gong)(gong)(gong)作(zuo)(zuo)面(mian)(mian)硬度(du)為HB170-240，經過兩次人(ren)工(gong)(gong)(gong)處理（人(ren)工(gong)(gong)(gong)退火600度(du)-700度(du)和自然時效2-3年）使(shi)鉗(qian)工(gong)(gong)(gong)平(ping)臺,鉗(qian)工(gong)(gong)(gong)平(ping)板(ban)(ban)精度(du)穩定(ding)，性能好，延長(chang)了(le)使(shi)用(yong)壽命。準確(que)度(du)等級(ji)(ji)分為0級(ji)(ji)、1級(ji)(ji)、2級(ji)(ji)、3級(ji)(ji)四個精度(du)等級(ji)(ji)，一(yi)般(ban)0級(ji)(ji)、1級(ji)(ji)、2級(ji)(ji)做檢驗平(ping)板(ban)(ban)、用(yong)，3級(ji)(ji)做劃線平(ping)板(ban)(ban)、用(yong)。一(yi)般(ban)單(dan)塊(kuai)(kuai)規(gui)格(ge)(ge)為100x100mm-3000x8000mm,大(da)于此規(gui)格(ge)(ge)時可以把多塊(kuai)(kuai)拼接在一(yi)起使(shi)用(yong)，規(gui)格(ge)(ge)可按(an)圖定(ding)制以滿足生產工(gong)(gong)(gong)作(zuo)(zuo)需(xu)要(yao)。工(gong)(gong)(gong)作(zuo)(zuo)面(mian)(mian)采用(yong)刮削工(gong)(gong)(gong)藝(yi)，具(ju)有較(jiao)好的平(ping)面(mian)(mian)穩定(ding)性和韌性，在上(shang)面(mian)(mian)可以根據工(gong)(gong)(gong)作(zuo)(zuo)需(xu)要(yao)加(jia)工(gong)(gong)(gong)V形、T形、U形槽和圓孔、長(chang)孔等以適應工(gong)(gong)(gong)作(zuo)(zuo)需(xu)要(yao)。按(an)結構不同鉗(qian)工(gong)(gong)(gong)平(ping)臺,鉗(qian)工(gong)(gong)(gong)平(ping)板(ban)(ban)一(yi)般(ban)分為箱(xiang)體式和筋(jin)板(ban)(ban)式兩種。

　　鉗工平臺(tai),鉗工平板具體平面度等級允許公差可以由以下公式計算：

　　0級鉗(qian)(qian)工(gong)(gong)平(ping)板(ban)、鉗(qian)(qian)工(gong)(gong)平(ping)臺平(ping)面度允差（微(wei)米）=0.003*鉗(qian)(qian)工(gong)(gong)平(ping)板(ban)、鉗(qian)(qian)工(gong)(gong)平(ping)臺對角(jiao)線(xian)長度（mm）+2.5；

　　1級鉗(qian)工(gong)平板、鉗(qian)工(gong)平臺平面度允差（微米(mi)）=0.006*鉗(qian)工(gong)平板、鉗(qian)工(gong)平臺對角線長度（mm）+5；

　　2級鉗(qian)工(gong)平(ping)(ping)板、鉗(qian)工(gong)平(ping)(ping)臺平(ping)(ping)面度允差（微米）=0.012*鉗(qian)工(gong)平(ping)(ping)板、鉗(qian)工(gong)平(ping)(ping)臺對角線長度（mm）+10；

　　3級鉗(qian)工平板(ban)、鉗(qian)工平臺(tai)平面度允差（微米）=0.024*鉗(qian)工平板(ban)、鉗(qian)工平臺(tai)對角(jiao)線長度（mm）+20。