文档介绍：标准螺纹螺距
Thread, pitch, standard default classification
Standard dental pitch:
Ml. 6~m7 * 0. 35
M2 * 0. 4
M2. 5 * 0. rror. In the case of rough machining or low thread accuracy, the front Angle of the machine is 5o ~ 20o. When installing threading tool center point on the workpiece, and model of cutter, to ensure the Angle bisector of blade Angle and the axis of the workpiece are perpendicular, car out of the tooth type Angle will be skewed. As shown in figure 3.
Figure 3 threading tool geometry Angle and use sample to the knife
the screw thread is round and the length of the thread is cut to the length of the thread. First, take the diameter of the thread to the size, then use the tip of the knife to cut a microvisible line from the thread on the workpiece, and mark it as the back of the thread.
according to the workpiece pitch P, check signs on the machine, and then adjust the feed box handle position and the match in the number of teeth on the wheel gear box for the artifacts needed to pitch.
Determine spindle speed. Beginners should set the lathe spindle speed to the lowest speed.
method and procedure of threading
to determine the starting position of thread cutting depth, dispatch skateboard in scale to zero, driving a car, make point slightly contact surface, and then quickly will slide in the calibration set to zero, in order to feed counting.
try the first spiral and check the pitch. Roll the saddle to the end of the workpiece from 8 to 10 teeth. Drive, close the nut, exit a spiral line from the surface of the workpiece, exit the tool from the thread termination line, and turn the turning back to the right side of the workpiece. Stop, check the pitch with steel ruler. As shown in figure 4 a.
adjust the load on the back with a dial and drive the cutting, as shown in figure 4d. The relationship between the total back of the thread and the pitch of the thread is 0. 65 P, which is about 0. 1 per second.
When the car knife will reach the end of the ca