Before the nitriding treatment of the plate bending machine, there are two heat treatment processes of pot tempering and stress relief. The quenching and tempering treatment is very important for the nitriding spindle, because the nitriding spindle & rsquo; does not require quenching and tempering to obtain a uniform and fine sorbite structure, and it is required that the ferrite in the surface layer 8 ~ 10mm from the surface should not exceed 5% . The presence of ferrite on the surface will cause the brittleness of nitriding and reduce the quality of nitriding. Because the nitriding layer of the nitriding spindle is very thin, if the internal stress of the spindle is not well removed before nitriding, there will be large white deformation after nitriding, and the thickness of the nitriding layer is not enough to offset the margin for correcting the bending deformation during the grinding process, so Before the precision spindle penetrates, the stress relief process must be arranged. For the phenanthrene nitriding precision spindle, although the terminal does not need to be treated with stress relief before surface hardening, the residual austenite structure in the stabilized hardened steel is stabilized after quenching and rough grinding, so that the size of the workpiece is stable and the processing stress is eliminated, and it needs to be arranged Low temperature/effect. The number of aging depends on the accuracy and structural characteristics of the parts.
Therefore, after the nitriding spindle, each sample must be cut to inspect the metallographic structure. Energy is consumed during the manufacturing process. Except for part of the energy consumed by the bending machine, it is converted into useful work. Energy is converted into other energy and was wasted. Resource-saving manufacturing technologies include reducing energy consumption in the manufacturing process, reducing raw material consumption in the bending machine, reducing energy consumption in the manufacturing process, and reducing other consumption in the manufacturing process. Improve the transmission efficiency of the equipment, reduce friction and wear. Reasonably arrange the processing technology, reasonably select the processing equipment of the bending machine, optimize the cutting amount, and make the equipment in an efficient operation state. Improve product and process design, adopt light-in forming method, and reduce energy consumption in the manufacturing process. Use moderate automation technology instead of full automation. The thread on the precision spindle of the plate rolling machine is directly ground on the thread grinder. In order to avoid the screw thread when loading and unloading the grinding wheel and the pulley, it is generally required to quench the thread part. However, if the thread has been quenched, it will be cracked due to stress concentration j, so the thread on the precision spindle is mostly not turned, and the flat machine uses the thread grinder to directly grind the unqualified ones after the quenching and rough grinding of the outer circle. It shall not be transferred to the next working procedure of the plate rolling machine.
