Screw pattern, the material of the turning tool is high-speed steel, the corner angle of the semi-finishing turning tool is left and right, the cutting edge angle of the precision turning tool, and the radial front angle. Fixing diagram) When the guide bar trapezoidal thread turning tool is used, the main cutting edge of the turning tool must be equal to the axis of the workpiece (the elastic bar should be higher than the axis line), and should be parallel to the axis of the workpiece. Correction of the model or universal angle ruler to adjust the exchange gear.
Use the middle skateboard dial to control the height of the tooth during roughing; measure the width of the crown with a vernier caliper, and ensure that there is a fine balance on each side.
When the trapezoidal thread is finished, the front corner is replaced by a precision turning tool, and the knife is used in the middle. First, refine the thread to the size of the thread, and then refine the thread bottom diameter, then move the small skater to the side of the direction of the tooth, flat, and the light can be; Diameter size. Lathe speed.
For the clamping and precautions of the combination fixture, the chuck clamping screw must be clamped. The center of the lathe tool holder is moved to the axis of the lathe, and the height of the mounting fixture is the same as the center of the lathe.
If necessary, install a pressure bearing on the screw and the slider.
The screw and nut should be fully lubricated, and emulsion or grease can be used.
Conclusion This paper introduces the design and fabrication of the machined bolt fixture. It has been verified in practice that it saves a lot of oxygen and acetylene compared with the original hand-made. It has high automation and simple operation, which can greatly reduce labor intensity and increase productivity.
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