⒈Non-indentation mold structure
Based on the above principles, according to the current processing capacity of CNC bending machines in the market, a mold for indentation free is coming into the market.
⑴ According to the plate type, the minimum bending material thickness of the mold is designed to be 0.6mm, the maximum bending material thickness is 2mm for steel plates and 2.5mm for aluminum plates.
⑵ In the design of the bending length, the combination of the characteristics of the lower die of the CNC bending machine is used to complete the combination. Considering the difficulty of the mold processing, the length is designed to be 200mm. Multiple sets of spares can be produced in the work, according to the different bending lengths of the parts requirement for a combination.
⑶ In order to maintain the stability of the mold performance and reduce the deformation during the mold processing, the materials of the die base and the rotating lower die are all used for the cold die special material Cr12 with stable performance, and it must be kneaded and forged, and the carbide segregation is 1 ~2 (fine pearlite tissue).
⑷ A specially designed special tension spring is used to meet the needs of the mold.
⑸ The mold meets the requirements of our company's existing CNC bending machine, and is convenient, safe and reliable to use.
⒉The design principle of non-indentation bending process
Aiming at the defects of traditional bending, engineers used the principle of seesaw to design the bending lower die into one piece for each of the left and right that can rotate around the axis. When the mold is not working, the working surfaces of the left and right lower molds are on the same horizontal plane. When the bending upper mold moves downward to perform the bending process, the left and right lower molds respectively perform a flipping movement around their respective rotation centers, forcing the material to rotate around the apex of the upper mold while being close to the working surface of the lower mold, thereby Bending deformation occurs, and finally the bending process of the material is completed. Since the working surface of the lower die rotates, the force uniformly acting on the surface of the material through the working surface of the lower die will not squeeze the local parts of the material, avoiding the crushing defects caused by the extrusion on the surface of the parts. At the same time, because the material rotates and bends around the apex of the upper mold, the material does not slide on the working surface of the lower mold, thereby avoiding the scratches on the surface of the parts.