After all, the hand plate is not the final product, in terms of the degree of use, excessive external force, temperature, environment and other factors will cause cracks or deformation of the hand plate. How to maintain the hand model? What better ways to prevent distortion? How to avoid the deformation of the hand plate during the manufacturing process, resulting in the scrap of the whole product?
1. Reasons for Cracks in Handplate Model
The main reason for the cracks in the hand plate model is that the internal stress cracks of the hand plate are larger than the maximum load-carrying capacity of the hand plate. Cracks appeared on the handplate. This is an irreversible loss, which should be avoided as far as possible.
2. why did the hand template change?
The internal stress of the hand plate will make the stress of the hand plate uneven, and the hand plate will be deformed.
Three methods to prevent hand plate deformation are introduced in detail.
In the design, the deformation of the hand plate is prevented, so that the thickness of the hand plate is uniform and the shape is symmetrical. Synchronized solidification is adopted in the casting process. This method reduces the internal stress of the hand plate and prevents deformation. In addition, the anti-deformation method is a preventive measure for the long hand plate model. The principle is to eliminate the stress of the hand plate through the pre deformation of the deformed plate with the same deformation and the same deformation.
After the hand plate is deformed, there are some residual stresses. The stress should be eliminated before handling the hand plate. Stress annealing and natural aging can be used to eliminate internal stress.
Secondly, the thermal crack of hand plate is mainly caused by mechanical stress and solidification of metal crack. The solution is to improve the structure of the hand plate and reduce its contact with the metal surface. Another method is to increase the thermal brittleness of metals by controlling the sulfur content of metals.
Third, the cold crack of hand plate belongs to the crack of low temperature product. This is due to the distortion of the handprint, which is often elongated on the handprint. Cold cracks are usually thin. When making large and thin hand panels, cold cracks often appear. Similarly, preventive measures are to reduce internal stress and control the phosphorus content in metals.
In the process of manuscript production, experienced manuscript personnel are needed to better deal with the factors such as internal stress which lead to the deformation of the manuscript. The main body of hand plate should deal with stress and balance, adjust the proportion of sulfur and phosphorus in metal, optimize the structure of hand plate, and reduce the influence of metal heat on hand plate.