锯割下料的留量锯削下料工艺.doc

锯割下料的留量锯削下料工艺Cutting the material .1机械锯割Mechanical sawing. .1.1弓锯床用于切割扁钢、圆钢和各种型钢。机械锯割时，可将材料用夹具束成一起再起锯。常用的型钢可利用螺栓和压板或专用夹具夹紧的方法。1.1 hacksaw machine used to cut flat steel, round steel and all kinds of steel. When mechanical sawing, but the material use jig bundle together into a back saw. Commonly used steel available bolt and plate or special fixture clamping method. .1.2 锯割下料时，常用各种型材的锯削下料工艺留量参见表。1.2 sawing blanking, all kinds of commonly used profiles of saw cutting blanking technology allowance see table. 。A 圆钢、方钢、钢管的锯削下料工艺留量直径或边距离d切口完度Bmm工件长度mm夹头mm5050-200200-500500-10001000-50005000mm端面工艺留量变2a(mm)30弓锯32234561530-80234568下料板限偏差a/4b 型钢的锯削下料工艺留量高度边长Hbmm切口宽B(用圆锥片)mm工件长度mm10001000-50005000端面工艺留量2a(mm)10068735710068-63019051015下料极限偏差a/4.1.3 锯割分远锯和近起锯两种。一般用远起锯较好，锯齿不易卡住。.1.4 锯割速度不能过快或过慢，推据时压力不能过大，否则容易折断锯条。.2 砂轮切割.2.1 砂轮切割机用于酿酒设备切割圆钢和异型钢管、角钢、扁钢等各种型钢。.2.2 切割各种型材宜单件切割，不能几件或多件束在一起。.2.3 砂轮下料时，常用各种型材的切割下料工艺留量参见表。直径或对边距离mm切口宽Bmm工件长度mm10001000-50005000端面工艺留量2a(mm)1004357100-1506468下料极限偏差a/4.2.4 切割时将型材装在可转夹钳上，驱动电动机通过皮带传动砂轮卡进行切割，用操纵手柄控制切割速度。操作时要均匀平稳，膨润土防水毯不能用力过猛，以免过载或砂轮崩裂。矿用塑料网操作中人应要站在砂轮片侧面，不准对面操作。. 2.4 will be cutting the profile in a convertible clamp, the drive motor through a belt drive wheel card for cutting, cutting speed is controlled by control handle. Operation to smooth uniform, cant too hard, so as not to overload or grinding wheel split. Operating middleman should s