Power-on diffusion welding products-nut punch rod

Material and structure : Tungsten steel is usually used as punch material, while high-speed steel is used for the body.The punch rod includes a body and a punch, the body has a mounting part and a support part, the diameter of the mounting part is smaller than the support part, and the two are arc-transitioned.The punch is fixed at one end of the mounting part, including a connecting part and a stamping part. The connecting part is welded and connected to the mounting part, and partly embedded in the mounting part. The stamping part is in the shape of a cone, which is convenient for punching.

Manufacturing technology : First, the high-speed steel is cut, cold headed into the initial blank, and then the body is heat treated to form;The tungsten steel is then cut and cast at high temperature to form a punch 4 .Then, the punch is connected to the body by using the electric diffusion welding technology. This technology uses current pulses to diffuse the atoms between the contact surfaces and migrate the interfaces to form a solid phase connection 1 .After wearing, place the punch rod in the grinder for precision grinding, and finally perform nitride titanium plating treatment on the hedge in the titanium plating furnace .

Advantages and features : Nut punch rods made through power-on diffusion welding technology combine the advantages of tungsten steel and high-speed steel, and have high strength, high toughness and wear resistance.At the same time, this technology does not require intermediate auxiliary materials, has high welding accuracy, small deformation, no welding scars on the surface of the punch rod, better quality and longer service life.Compared with all tungsten punch rods, the cost is lower and the cost performance is higher.

Application scenario : It is mainly used in the nut manufacturing industry and is used for punching process 4 during the nut cold heading forming process.Due to its high precision and wear resistance, it can ensure high accuracy of the inner hole of the punched nut, thereby improving the thread accuracy of subsequent processing. It is suitable for automobiles, aerospace and other fields that require high nut accuracy.