项目十四螺纹加工练习

广东创新科技职业学院项目十四螺纹加工练习［学习目标］ 1．熟悉数控切削螺纹的要点及相关计算 2．学会FANUC的T系统与GSK980T的螺纹加工指令使用［学习重点］ 螺纹加工指令使用［学习难点］ 螺纹切削指令的格式一、基本知识学习（一）螺纹切削工艺要点1． 相关计算 螺纹牙型高度h=0.6495P直径方向计牙深约为1.3PP—螺距（不是导程）2．螺纹起点与终点轴向尺寸升速起刀段：不小于两倍导程降速退刀段：不小于（1~1.5）导程3．分层切深（以直径计）一般第一刀取0.5P后取前一刀的0.7倍递减单刀最大切深一般不大于1，最小不小于0.1，常见螺距的螺纹切深可参考表1-14-1。举例（参考）：P=2.0牙深1.299分层为0.9+0.6+0.6+0.4+0.1P=2.5牙深1.624分层为1.0+0.7+0.6+0.4+0.4+0.154．螺纹顶径控制在螺纹切削时，由于刀具的挤压使得最后加工出来的顶径处塑性膨胀，从而影响螺纹的装配和正常使用，考虑到这个问题，在螺纹切削前的圆柱加工中，先多切除一部分材料，将外圆柱先车小，内圆柱先车大，这个值一般大约是0.2~0.3mm。5．刀具使用目前螺纹加工一般是两种加工情况，一类是使用高速钢材料低速加工，另一类是使用硬质合金、涂层刀具等进行高速加工，编程时要根据刀具材料情况设定转速。（二） 编程指令1．单行程螺纹切削指令G32FANUC0i-MATE-TC系统格式：G32X（U）___Z（W）___F___

X、Z：取值为螺纹终点坐标值；U、W：取值为螺纹终点相对循环起点的坐标分量；F：螺纹的导程。SIMENS802D系统格式：G33Z...K...:圆柱螺纹,K表示导程。G33Z...X...K...:圆锥螺纹,K表示导程，Z轴位移较大，锥角小于45度。G33Z...X...I...:圆锥螺纹,I表示导程，X轴位移较大，锥角大于45度。G33X...I...:端面螺纹,I表示导程。2．螺纹切削循环指令G92格式：G92X（U）___Z（W）___R___F___图1-14-1螺纹切削循环轨迹3．螺纹切削复合循环指令（1）FANUC0i-MATE-TC系统G76指令（2）SIMENS802D系统CYCLE97指令详细注解见下一项目。二、实践训练1．实训内容：编程加工带螺纹零件2．加工要求：3．基本工艺及参考程序工步号工步内容刀具号刀具名称刀具规格主轴转速r/min进给速度mm/min切削深度mm1粗车外轮廓T0193°硬质合金外圆车刀93°5001201.52精车外轮廓T0193°硬质合金外圆车刀93°1000600.253切槽T02高速钢切槽刀刀宽3mm200304车削螺纹T0360°硬质合金三角螺纹车刀60°6001200FANUC0i-MATE-TC系统SIMENS802D系统O1400SC1400N0010G98M03S500N0010G94M03S500N0020T0101N0020M6T1N0030G00X150.0Z100.0N0030G00X150.0Z100.0N0040X45.0Z2.0N0040X45.0Z2.0N0050G71U1.5R1.0F120N0050CYCLE95(“ABCD12：ENDE”，1.5，0.2，0.25，0，120，80，60，9，，，)N0060G71P70Q130U0.5W0.2N0100ABCD12：N0070G00X14.0N0110G00X14.0N0080G01X19.8Z-2.0F60N0120G01X19.8Z-2.0F60N0085Z-15.0N0130Z-15.0N0090X26.0N0140X26.0N0100X29.8Z-17.0N0150X29.8Z-17.0N0110Z-40.0N0160Z-40.0N0120X36.0N0170X36.0N0130Z-46.0N0180Z-46.0N0140G00X150.0Z100.0N0190ENDE：N0150M05N0195G00X150.0Z100.0N0160M00N0200T2S200N0170T0101M03S1000N0210G00X30.0Z-15.0N0170G00X45.0Z2.0N0220G01X16.2F30N0180G70P70Q130N0230X30.0F300N0190G00X150.0Z100.0N0240Z-13.0N0200T0202S200N0250G01X16.0F30N0210G00X30.0Z-15.0N0255G04F2N0220G01X16.2F30N0260G01Z-15.0N0230X30.0F300N0270X40.0F300N0240Z-13.0N0280G00Z-40.0N0250G01X16.0F30N0290G01X24.2F30N0255G04X2N0300X32.0F300N0260G01Z-15.0N0310Z-38.0N0270X40.0F300N0320G01X24.0F30N0280G00Z-40.0N0330G04X2N0290G01X24.2F30N0340G01Z-40.0N0300X32.0F300N0350X32.0F300N0310Z-38.0N0360X150.0Z100.0N0320G01X24.0F30N0370T3S600N0330G04X2N0380G00X19.0Z5.0N0340G01Z-40.0N0390G33Z-12.5K2.5N0350X32.0F300N0400G00X25.N0360X150.0Z100.0N0410Z5.N0370T0303S600N0420X18.3N0380G00X25.0Z5.0N0430G33Z-12.5K2.5N0390G92X19.0Z-12.5F2.5N0440G00X25.N0400X18.3N0450Z5.N0410X17.7N0460X17.7N0420X17.3N0470G33Z-12.5K2.5N0430X16.9N0480G00X25.N0440X16.75N0490Z5.N0450G00X29.1Z-10.0N0500X17.3N0460G32Z-37.5F2.0N0510G33Z-12.5K2.5N0470G00X35.0N0520G00X25.N0480Z-10.0N0530Z5.N0490X28.5N0540X16.9N0500G32Z-37.5F2.0N0550G33Z-12.5K2.5N0510G00X35.0N0560G00X25.N0520Z-10.0N0570Z5.N0530X27.9N0580X16.75N0540G32Z-37.5F2.0N0590G33Z-12.5K2.5N0550G00X35.0N0600G00X29.1Z-10.0N0560Z-10.0N0610G33Z-37.5K2.0N0570X27.5N0620G00X35.0N0580G32Z-37.5F2.0N0630Z-10.0N0590G00X35.0N0640X28.5N0600Z-10.0N0650G33Z-37.5K2.0N0610X27.4N0660G00X35.0N0620G32Z-37.5F2.0N0670Z-10.0N0630G00X35.0N0680X27.9N0640G00X150.0Z100.0N0690G33Z-37.5K2.0N0650T0101N0700G00X35.0N0660M05N0