机械

链轮的齿形加工通常采用成型刀具在滚齿机或插床上加工,一把刀具只能加工一种尺寸的链轮,通用性不强,且成本高。国标GB/T 1243-2006中链轮的齿槽形状由三段圆弧组成,可以利用数控机床的计算功能编制宏程序,输入链轮图纸上的参数后计算出各段圆弧的半径和起点、终点坐标,再利用数控机床曲线加工能力,用铣刀沿着链轮齿形轮廓行进,加工出链轮齿形。只要立式铣刀半径小于链轮齿沟圆弧半径,就能满足加工要求,从而大大节省了成型刀具的费用。编写出的宏程序具有通用性,适用于所有国标GB/T 1243-2006中所有链轮的齿形加工。

Groove profile machining chain sprocket usually adopts the forming tool in gear hobbing machine or gear slotting machine, the processing forming tool, a tool can only process a dimension chain sprocket, the generality is not strong, and the cost is high. Groove profile GB/T 1243-2006 chain sprocket is composed of three sections of arcs, can use the calculation function of CNC machine, write a macro program, input parameters of chain sprocket on the drawing, reuse CNC machine curve processing ability, End mill along the sprocket groove contour traveling, machining sprocket groove. As long as the end mill radius is less than the sprocket groove arc radius, can meet the processing requirements, thus greatly save the cost of the forming tool. Write a macro program is generality, applicable to all the GB/T 1243-2006 sprocket groove processing.