Most of them nowChinese herbal medicine grinderWelded profiles are made of steel plates or stainless steel plates, and during the welding process, it is easy to experience undercutting. undercutting is caused by improper selection of welding parameters or incorrect operation methods, resulting in grooves or depressions along the base metal part of the weld seam.
The biting edge has decreasedChinese herbal medicine grinderThe effective area on the base metal of the steel plate not only weakens the strength of the welded joint, but also forms stress concentration at the biting edge, which may cause cracks at the biting edge after bearing. Therefore, the welded components that bear the load have certain limitations on the depth and length of the biting edge. In general welding structures, the biting depth is usually not allowed to exceed 0.5 millimeters. In the welding of important parts of traditional Chinese medicine crushing equipment, biting edge is not allowed to exist.
In weldingChinese herbal medicine grinderWhat is the reason for biting during the mechanical process? Mainly due to factors such as excessive flame energy, incorrect inclination angle of the welding torch, and improper swinging of the welding torch and wire.
How to take effective measures to prevent the occurrence of undercutting in welds? The correct choice of flame energy rate is to prevent the occurrence of undercutting in welds. During operation, the swing of the welding torch and wire should be appropriate, and the inclination angle of the welding torch should be correctly controlled.
The correct selection of gas welding parameters is an important basis for ensuring the quality of gas welding joints. Gas welding parameters usually include the grade, diameter, solvent, flame properties and flame energy rate of the welding wire, inclination angle of the welding nozzle, welding direction, and welding speed.
Chinese herbal medicine grinderSelection of welding wire diameter.
The diameter of the welding wire should be determined according to the thickness and groove form of the traditional Chinese medicine grinder welding piece. Welding position. It is determined by factors such as flame energy rate. In the case of determining the flame energy rate, the thickness of the welding wire of the traditional Chinese medicine crusher determines the melting speed of the welding wire. If the welding wire is too thin, the welded part has not melted yet, and the welding wire drips down due to melting, causing incomplete fusion. Defects such as uneven weld height and uneven weld width, as well as thicker welding wire, increase the required heating time and expand the heating range of the welded part, causing overheating of the heat affected zone and reducing the quality of the welded joint. When welding multiple layers, thinner welding wire should be used for the second layer, and thicker welding wire should be used for each subsequent layer. Generally, thicker welding wire should be used for flat welding positions compared to other welding positions, and the welding wire used for right welding method is more appropriate than that used for left welding method. The diameter of the welding wire is usually preliminarily selected based on the thickness of the workpiece. Adjust and confirm after trial welding. The diameter of welding wire and thickness of steel plate for low-carbon steel used in the production of traditional Chinese medicine crusher are detailed in this table.