First, should pay attention to the set of thread: pump diaphragm pump pneumatic diaphragm pump electric diaphragm pump
1. Chamfer: In order to facilitate the cutting part of the die cutting part and make correct guidance, there should be a 15 degree to 20 degree chamfer at the end of the workpiece round bar.
2. The end face of the die and the end face of the round bar should be vertical. In order to prevent the round bar from being skewed and pinched, the round bar should be clamped in a V-shaped pliers 21 made of hardwood or a pad made of soft metal.
3. When starting the threading, press the center of the circular die with one palm, apply pressure along the axial direction of the round bar, and rotate the die bar, the other hand is matched with the forward cutting, the rotation is slow, and the pressure is large;
4. When the circular die cuts the human round rod 1 to 2 turns, the position of the circular die should be visually inspected and corrected. When the circular die is cut into the round rod for 3 to 4 times, the pressure should be stopped, so that the die is naturally introduced by the thread to avoid damage to the thread and the die;
5, in the process of threading, should also always reverse l/4 ~ 1/2 circle, in case the chip is too long;
6. Add the cutting fluid directly during tender to reduce the cutting resistance, improve the thread quality and extend the service life of the die.
two,. Thread common problems and prevention methods
See Table 4-8 for common problems and prevention methods for threaded sets.
Table 4-8 Thread common problems and prevention methods
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