1.The structure of the welded cutting tool should have sufficient rigidity. Sufficient rigidity is guaranteed by the largest allowable outline size and the use of higher-strength steel grades and heat treatment.
2. The cemented carbide blade should be fixed firmly. The cemented carbide welding blade should have sufficient fixation and reliability. It is guaranteed by the knife groove and welding quality. Therefore, the insert groove shape of the blade should be selected according to the shape of the blade and the geometric parameters of the tool.
3. Check the cutter bar carefully.
Before welding the cemented carbide blade to the shank, it is necessary to check the blade and the shank. First, check that the blade bearing surface cannot be severely bent. The cemented carbide welding surface must not have a serious carburized layer, and the The dirt on the surface of the cemented carbide blade and the insert groove of the tool shaft is removed to ensure a reliable welding.
4. Reasonable selection of solder
In order to ensure the strength of the welding, suitable solder should be selected. During the welding process, good wettability and fluidity should be ensured, and air bubbles should be eliminated, so that the welding and the alloy welding surface are fully contacted, and there is no lack of welding.
5. Correct choice of welding flux
It is recommended to use industrial borax, which should be dehydrated in a drying furnace before use, then crushed, sieved to remove mechanical debris, and set aside.
6. Select mesh compensation gasket
When welding high-titanium and low-cobalt fine-grain alloys and welding long and thin alloy blades, 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 compensation gasket with a mesh diameter of 2--3mm for welding. .
7. Use sharpening methods correctly
Due to the brittleness of cemented carbide blades and strong sensitivity to crack formation, the tool should avoid overheating or rapid cooling during the sharpening process. At the same time, it is necessary to choose a suitable particle size grinding wheel and a reasonable grinding process to avoid sharpening cracks. Affect tool life.
8. Install the tool correctly
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 tool vibration and damage the alloy sheet.
9. Correctly regrind and grind tools
When the tool is used to achieve normal bluntness, it must be re-ground.After re-grinding, the cutting edge and the corner of the tool must be ground with oilstone, which will improve the service life and safety and reliability of the tool.
