High strength ring chain production technology

      Ring chain production process: feeding → cold bending braid → closing → welding → primary correction → Heat treatment → secondary correction (pre-drawing) → inspection. Welding and heat treatment are the key processes in the production of mining ring chains, which directly affect the quality of products. Scientific welding parameters can improve the yield and reduce the production cost; Appropriate heat treatment process can give full play to material properties and improve product quality.
      In order to ensure the quality of mining ring chain welding, manual arc welding and resistance butt welding have been eliminated. Flash butt welding is widely used because of its outstanding advantages such as high automation, low labor intensity and stable product quality.
      At present, the heat treatment of mining ring chain generally adopts medium frequency induction heating continuous quenching and tempering. The essence of medium frequency induction heating is that the molecular structure of the object is stirred under the electromagnetic field, and the molecules obtain energy and generate heat by collision. Medium frequency induction heat treatment, the sensor into a certain frequency of alternating current, the workpiece in the sensor uniform speed movement, so that in the workpiece will produce an induction current with the same frequency of the sensor, in the opposite direction, so that the electric energy into heat energy, in a short time to heat the workpiece to the temperature required by quenching and tempering.