How to put the mold positioning pin？
When installing the mold positioning pin, the hardness of the mold is often similar to that of the drill bit and the reamer. When the positioning pin is used, the drill bit cannot be drilled, and the reaming of the reamer is very difficult. In this case, we have adopted the following methods to resolve the contradiction: before the quenching, the mold is at the position of the pin, according to the size of the pin hole, the diameter is increased by 6~10mm, the diameter is at least 4mm, and then the mold is quenched. Hard to 62HRC on the machine will press the plug into the mold hole, Q235A or 45 steel can be. This method is used to install the mold positioning pin, which is not only easy to install, but also safe and reliable.
Second, the standard of mold positioning pin
Mold positioning pin is a standard part
Cylindrical pin: GB/T119.1-2000 GB/T119.2-2000
Internal threaded cylindrical pin: GB/T120.1-2000 GB/T120.2-2000
Tapered pin: GB/T117-2000
Third, the classification of mold positioning pins
Fixed mold positioning pin
2. Replaceable mold positioning pin
3. Cone mold positioning pin
4. Flanged die positioning pin
5. Standard diamond mold positioning pin
Fourth, the use of mold positioning pins
The role of the mold positioning pin is to limit the free movement of the item.
Linear motion, and rotational motion around X, Y, Z. Degree of freedom: When an object is in space, there must be six degrees of freedom, X, Y, and Z.
In a mold composed of two or more parts, a pin designed to accurately position two adjacent portions of the mold.
In the spindle positioning, 1) mechanical cam mechanism (2) photoelectric plate mode for coarse positioning, then a hydraulic or pneumatic mold positioning pin is inserted into the pin hole or pin groove on the spindle to achieve precise positioning, and the mold positioning after the tool change is completed. When the pin exits, the spindle begins to rotate.
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