Bending machine moulds play an extremely important role in modern industry, and its quality directly determines the quality of the product. Increasing the service life and accuracy of the bending machine mold and shortening the manufacturing cycle of the bending machine mold are technical problems that many enterprises urgently need to solve. However, the bending angle, deformation, wear and even break often occur during the use of the bending machine mold. The form of failure. Therefore, repair of the bending machine mold is also necessary. There are many ways to repair the bending machine mold, such as electric spark process, argon arc welding repair, laser surfacing technology, and brush plating method.
Argon arc welding repair The arc that is burned between the continuously fed wire and the workpiece is used as a heat source, and the gas ejected from the torch nozzle protects the arc for welding. At present, argon arc welding is a commonly used method and can be applied to most major metals, including carbon steel and alloy steel. Molten inert gas shielded welding is suitable for stainless steel, aluminum, magnesium, copper, titanium, zirconium and nickel alloys. Due to its low price, it is widely used in the repair and welding of bending machine molds, but the welding heat has large area and large solder joints. At present, laser welding has been gradually replaced in the repair of precision bending machine molds.
Brush plating repair brush plating technology is to use a special DC power supply equipment, the positive pole of the power supply is connected to the pen as the anode during brush plating; the negative pole of the power supply is connected to the workpiece as the cathode during brush plating. The plated pen is usually high purity. The fine graphite block is used as the anode material, and the graphite block is covered with cotton and wear-resistant polyester cotton sleeve. During operation, the power supply component is adjusted to a suitable voltage, and the plated pen penetrating the plating solution is at a certain relative movement speed in the workpiece to be repaired. The surface moves back and forth and maintains a certain pressure until a uniform ideal metal deposition layer is formed. Due to the contact of the plating pen with the surface of the workpiece being repaired, the metal ions in the plating solution diffuse onto the surface of the workpiece under the action of the electric field force. The electrons are reduced to metal atoms on the surface, so that the metal atoms are deposited and crystallized to form a coating layer, that is, the uniform deposition layer is obtained on the working surface of the mold cavity of the repaired plastic bending machine. China Plastic Bending Machine Mould Net Laser surfacing repair laser welding is a laser beam that is focused by a high-power coherent monochromatic photon stream and is used as a heat source for welding. This welding method usually has continuous power laser welding and pulse power laser welding. The advantage of laser welding is that it does not need to be carried out in a vacuum. The disadvantage is that the penetration force is not as strong as that of electron beam welding. Accurate energy control during laser welding enables precision soldering of devices. It can be applied to many metals, especially to weld some difficult-to-weld metals and dissimilar metals. It has been widely used in the repair of bending machine molds.
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