逆铣<img src="attachments/dvbbs/2003715445940168.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2003715445940168.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
顺铣<img src="attachments/dvbbs/2003715451120503.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2003715451120503.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
采用顺铣时,首先要求机床具有间隙消除机构,能可靠地消除工作台进给丝杆与螺母间的间隙,以防止铣削过程中产生的振动。如果工作台是由液压驱动则最为理想。其次,要求工件毛坯表面没有硬皮,工艺系统要有足够的刚性。如果以上条件能够满足时,应尽量采用顺铣,特别是对难加工材料的铣削,采用顺铣不仅可以减少切削变形,降低切削力和功率的小号,而且可以提高刀具寿命。
在数控铣和加工中心,由于系统刚性较大,使用的是滚珠丝杠,特别是在精加工阶段,一般采用顺铣。
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[此贴子已经被borlly于2003-7-24 11:37:02编辑过]
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