Solution to the strain of the tungsten carbide drawing die:
To solve the problem of strain during the forming process of the tungsten steel drawing die and the workpiece, the basic principle of reducing adhesive wear should be followed, and the starting point should be changed by changing the nature of the contact pair. The three parties that constitute the pair of contact pairs, namely the raw material aspect of the formed workpiece, the workpiece and the mold, and the mold aspect are respectively analyzed as follows.
1. The raw material aspect of the formed workpiece
By surface treatment of raw materials, such as phosphating, spraying or other surface treatments on raw materials, a non-metallic mold layer is formed on the surface of the material to be formed, which can greatly reduce or eliminate the strain on the workpiece. High, and need to add additional production equipment and increase the production process, although this method sometimes has some effects, in actual production applications are very few.
2. Between the workpiece and the mold
Adding a layer of PVC film between the mold and the forming material can sometimes solve the problem of strain on the workpiece. For the production line, the film can be continuously supplied through the mechanism, and for the periodic production of stamping equipment, a film needs to be added for each workpiece produced, which affects production efficiency. This method is generally costly and produces a large amount of waste. For small batches It is advisable to use this method for the production of large workpieces.
In some occasions where the forming load is small, sometimes the problem of strain on the workpiece can be solved by adding lubricating oil or adding EP additive lubricating oil.
3. Mold
By changing the convex and concave ink materials of the mold or performing surface treatment on the convex and concave molds of the mold, the contact properties of the material to be formed and the convex and concave molds are changed. Practice has proved that this is an economical and effective method to solve the strain problem, and it is also a widely used method.
In summary, there are many ways to solve the problem of surface strain on the convex and concave molds of workpieces and molds. For specific cases, the application method should be selected according to the size of the workpiece and the load, the production batch, and the type of material to be processed. Among all the methods to solve the strain problem, it is best to use cemented carbide as the mold material and chemical vapor deposition and TD coating treatment on the convex and concave surfaces of the mold. Among them, TD cladding is the most cost-effective.
More details,pls contact Toby, E-mail:sales-manager302 at wococarbide.com.
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