Brief introduction to the loss of Tungsten carbide drawing die: The roughness of the working belt and the shunt cavity of the working belt polishing mold determines the surface quality of the aluminum profile, especially the rougher the working belt contact surface, the greater the friction, the faster the mold wears, and the easier it is to jam Mold, thereby increasing the extrusion force, causing the mold to crack and scrap. The polishing of the working belt must ensure that its flatness is parallel to the extrusion direction to prevent the flow-promoting angle or the blocking angle from affecting the metal flow rate and causing the mold to block.
The influence of assembly quality not only has the same quality requirements for the parting and flat molds, but also controls the assembly quality of the mold hole to make the clearance fit between the mold core and the mold hole uniform, otherwise there will be a local clearance gap and the mold is scrapped. In addition, when the wall thickness of the profile is qualified, the gap should be assembled with the lower limit of the wall thickness as much as possible to extend the service life of the mold. After the mold nitriding treatment passes the mold test, the mold should be nitrided. At present, there are many kinds of nitriding processes, and different oxidizing media will make different processes.
Solution to the strain of Tungsten carbide drawing die:
In order to solve the strain problem in the forming process of the Tungsten carbide drawing die and the workpiece, the starting point should be to reduce the adhesive wear and change the performance of the contact pair. The following analyzes the three aspects that constitute the pair of contact pairs, namely, the raw material for forming the workpiece, the gap between the workpiece and the mold, and the mold.
1. The raw material for forming the workpiece
Through the surface treatment of the raw material, such as phosphating, spraying or other surface treatments, a non-metal mold layer can be formed on the surface of the molding material, which can greatly reduce or eliminate the strain of the workpiece. This method is usually costly and requires additional production equipment and production procedures. Although this method sometimes has some effects, it is rarely used in actual production.
Tungsten carbide drawing die
2. Between the workpiece and the mold
Adding a layer of PVC film between the mold and the molding material can sometimes solve the problem of workpiece strain. For the production line, the film can be continuously supplied through the mechanism, but for the periodic production of stamping equipment, each workpiece needs to add a layer of film, which affects the production efficiency. This method is usually costly and generates a lot of waste. It is recommended to use this method to produce large workpieces in small batches.
In some occasions where the forming load is small, sometimes the strain problem of the workpiece can be solved by adding lubricating oil or EP additive lubricating oil.
3. Mould
By changing the ink material of the male mold and the female mold or performing surface treatment on the male mold and the female mold, the properties of the contact pair between the formed material and the male mold and the female mold are changed. Practice has proved that this is a cost-effective and effective method to solve the emergency problem, and it is also widely used.
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