Cemented carbide coal button, as one of the important tools for cutting coal rock, are made up of cemented carbide button brazed to alloy structural steel and are generally used in coal mining machines to cut and extract coal directly, hence the name cemented carbide coalbutton.The alloy head of the cut-off tooth, the front end of the tooth, is in direct contact with the coal rock. The size and quality of the alloy head, to a certain extent, determines the performance of the cut-off tooth. All other factors being equal, the larger the alloy and the better the alloy material, the higher the quality of the button..
So, how big are alloys? The size of the alloy varies from model to model. For example, the alloy size of Jetvision's coal inserts button ranges from 17mm to 35mm. This 17mm or 35mm means that the diameter of the alloy is 17mm or 35mm. Generally speaking, the larger the alloy, the harder the rock formation that the cut-off can resist.
As the alloy is in constant contact with the rock during the working of the cut-off tooth, many parts of the tooth, including the head, the alloy and the tooth body, are subject to wear, and in more serious cases the alloy may fall off. The larger the alloy, the more material is used and the less likely it is to be worn.
In addition, the size of the coal button and the overall welding process are also important. You may think that the alloy of the cut-off is an indication of the quality of the cut-off, but this is clearly not true. The best alloy will not help if the shank breaks without an advanced heat treatment process. For alloys over 25mm, the alloy will also fall off if it is not welded effectively. There are also factors such as the shape of the alloy that can affect the quality of the cut-off. Also, the larger the alloy the better. You must follow the manufacturer's advice and match the right alloy to get the most out of your cut-offs.
Excellent carbide coal button can be used for a long time, with less frequent replacement and low chance of failure, which can improve productivity and increase the efficiency of rotary excavators. So we all pursue high quality carbidecoal button, today we will talk about how to optimise carbide cut-off teeth from the process and manufacturing aspect.
In the manufacturing process, we must strictly follow the relevant design requirements for production, to ensure that the size of the tooth holder and the carbide button are compatible with each other, to ensure that the carbidebutton for coal can freely and flexibly rotate in the corresponding tooth holder, to avoid the phenomenon of partial grinding of the cut-off teeth in the process of operation, and to ensure the sharpness of the cut-off teeth, thus ensuring the realization of the self-sharpening function.
With the carbide cut-off tooth alloy head overlay welding process, the wear-resistant wire with relatively good wear resistance and plasticity is selected and three wear-resistant layers are overlaid on the cut-off tooth body and the alloy head weld seam. The substrate is protected from wear. In the overlay layer, the size of the carbide is greatly reduced and the carbide distribution per unit area is more dense, so that when subjected to impact loads, the impact force on a single carbide is significantly reduced and therefore the impact resistance of the entire overlay layer is significantly improved.
The use of the above methods to optimise the carbide coal button will allow the cut-off teeth to play a good role in the specific operation process and provide a favourable technical guarantee for the smooth conduct of coal mining work.
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