Carbide brazing inserts are more common metal cutting tool inserts on cutting machine tools, and are generally used on turning tools and milling cutters.
Nine points of use of cemented carbide welding insertss:
1. The brazing cutting tool structure should have sufficient rigidity. The sufficient rigidity is guaranteed by the maximum allowable external dimensions, and the use of higher-strength steel grades and heat treatment.
2. The cemented carbide inserts should be fixed firmly. The cemented carbide welding inserts should have sufficient fixation and reliability. It is guaranteed by the knife groove and welding quality. Therefore, the insert groove shape of the inserts should be selected according to the shape of the inserts and the geometric parameters of the tool.
3. Carefully check the cutter bar. Before welding the inserts to the cutter bar, it is necessary to check the inserts and the cutter bar. First, check that the inserts supporting surface cannot be severely bent. The cemented carbide welding surface must not have a serious carburized layer, and at the same time The dirt on the surface of the carbide inserts and the insert groove of the tool bar should also be removed to ensure reliable welding.
4. Reasonable selection of solder In order to ensure the strength of the soldering, the appropriate solder should be selected. During the soldering process, good wettability and fluidity should be ensured, and air bubbles should be eliminated, so that the soldering and the alloy soldering surface are fully contacted, and there is no lack of soldering.
5. The correct choice of welding flux is recommended to use industrial borax. Before use, it should be dehydrated in a drying furnace, then crushed, sieved to remove mechanical debris, and set aside.
6. When using mesh compensation gaskets for welding high-titanium and low-cobalt fine-grain alloys and welding long and thin alloy insertss, in order to reduce welding stress, it is recommended to use a thin sheet with a thickness of 0.2-0.5mm or a mesh with a diameter of 2-3mm The mesh compensation gasket is brazing.
7. Correctly adopt the sharpening method. Because the carbide insertss are brittle and sensitive to crack formation, the tool should avoid overheating or rapid cooling during the sharpening process, and at the same time, choose a suitable particle size grinding wheel and a reasonable grinding process. , To avoid sharpening cracks and affect the service life of the tool.
8. Correctly install the tool. When installing the tool, the length of the tool head extending from the tool holder should be as small as possible, otherwise, it will easily cause the tool to vibrate and damage the alloy sheet.
9. Correct regrinding and grinding of the tool. When the tool is used to achieve normal bluntness, it must be regrinded. After the regrind, the cutting edge and the corner of the knife must be ground with oilstone, which will increase the service life of the tool. Safety and reliability.
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