丝杠是机械设备中传动运动的重要构件，应用范围很广泛，梯形丝杠是能够将直线运动转化为旋转运动，或者将旋转运动转化成直线运动，今天我们就来了解一下梯形丝杠车削加工工艺的流程。

The lead screw is an important component in mechanical equipment for transmission motion, with a wide range of applications. The trapezoidal lead screw can convert linear motion into rotary motion, or convert rotary motion into linear motion. Today, we will learn about the process of turning trapezoidal lead screws.

1、丝杠螺纹小于4mm和精度要求不高的工件可用梯形螺纹车刀采用左右经给法进行粗车和精车。

1. Workpieces with screw threads less than 4mm and low precision requirements can be roughened and precision machined using trapezoidal thread turning tools using the left and right warp feeding method.

2、丝杠螺纹大于4mm和精度要求较高的梯形丝杠螺纹，一般采用分刀车削的方法。

2. For trapezoidal screw threads with a thread size greater than 4mm and high precision requirements, the method of cutting by cutting is generally used.

3、粗车，半精车梯形丝杠螺纹大经时留0.3mm左右余量，且丝杠螺纹倒角与端面成15度。

3. For rough and semi precision turning of trapezoidal screw threads, a margin of about 0.3mm should be left when the thread is large, and the chamfer of the screw thread should be 15 degrees from the end face.

4、用粗车刀粗车，采用左右切削法或直进车削，（每侧留0.1-0.2mm精车余量），选用刀头宽度稍小于槽低宽的车槽。

4. Use a rough turning tool for rough turning, using the left and right cutting method or straight cutting, with a precision turning allowance of 0.1-0.2mm on each side, and select a groove with a tool head width slightly smaller than the lower width of the groove.

5、选用精车梯形丝杠螺纹车刀，采用左右切削法精车螺纹两侧，精车刀经向前角为0度，刀尖等于牙型角，两侧切削刃都磨有较大前角的卷削槽，车刀前端不能参加切削。

5. Choose a precision turning tool for trapezoidal screw threads, using the left and right cutting method to precision turn both sides of the thread. The precision turning tool has a forward angle of 0 degrees, the tool tip is equal to the tooth angle, and both cutting edges are ground with large rolling grooves at the front angle. The front end of the turning tool cannot participate in cutting.