Bending refers to the deformation of the steel plate under the action of force. The effect of this force is the final result of the resultant force. It is a stamping process for bending metal sheets, pipes and profiles into workpieces with a certain curvature, shape and size. Bending forming is widely used in the manufacture of high-pressure vessels, boiler drums, boiler tubes, steel plates and ribs of ship hulls, various utensils, instrument components, and cabinet inserts. According to process characteristics, bending can be divided into press bending, roll bending and stretch bending. Press bending is the most commonly used bending method. Most of the equipment used are general mechanical presses or hydraulic presses, but also special bending presses. The commonly used bending equipment is a plate bending machine.

Drilling, various holes of mold parts, such as screw holes, screw perforations, pin holes, mandrel holes, round core fixing holes, etc., need to be drilled and reamed to achieve the precision and roughness of the hole diameter, hole pitch Claim. Commonly used processing methods include single part drilling, pilot drilling and combined drilling.

Welding, also known as welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by heating, high temperature, or high pressure. There are many energy sources for modern welding, including gas flames, electric arcs, lasers, electron beams, friction and ultrasonic waves. In addition to being used in factories, welding can also be carried out in a variety of environments, such as the field, underwater and space. No matter where it is, welding may bring danger to the operator, so appropriate protective measures must be taken when welding. The possible harm to the human body caused by welding includes burns, electric shock, visual impairment, inhalation of toxic gases, excessive ultraviolet radiation, etc.