Sheet metal processing is now a thriving industry, which often brings many additional problems. For example, as the workload increases, the error rate of products will also increase, and the number of problematic parts will also rise. Basically, the problems that occur are concentrated in the deformation of sheet metal processing parts and the insufficient rebound during the sheet metal processing process. So, how to deal with the deformation that occurs during sheet metal processing?
For many sheet metal processing operations, a lot of processing is required for sheet metal parts, especially during the cooling process of the parts. The type of quenching medium, cooling performance, quenching hardness, etc. used in sheet metal processing are related to deformation. The change in cooling performance can be adjusted by changing the viscosity, temperature, liquid level pressure of the medium, using additives, stirring, etc. The higher the viscosity and temperature of quenching oil, the smaller the elliptical deformation, and the smaller the deformation in the static state.
In the heat treatment of forgings, the placement of parts to reduce deformation is as follows: first, hang them vertically as much as possible; second, place them vertically at the bottom of the furnace; third, use two-point horizontal support, with the fulcrum position between one-third and one-quarter of the total length; fourth, place them flat on heat-resistant steel fixtures.
Sheet metal processing pressure reduction quenching is achieved by reducing the liquid level pressure of the quenching medium, thereby extending the steam film stage, reducing the cooling rate in the high-temperature zone, and making the cooling rate of each part of the part uniform. Cool the parts from the quenching temperature to a temperature slightly above the Ms point, then remove them from the furnace and maintain them in an atmosphere to ensure uniform temperature throughout the entire part. Then, cool the parts with oil to ensure even martensitic transformation and greatly improve the irregularity of deformation.
