Guangdong Machinery Factory shares with you the influence and Countermeasures of the service life of cold stamping die
The heat treatment quality of the mould in Dongguan CNC processing plant has a great influence on the properties and service life of the mould. It has been proved that the quenching deformation and cracking of die working parts and the early fracture in the process of use are related to the metallurgical quality, forging quality, die structure and processing, but more to the heat treatment of the die. According to the analysis and statistics of die failure causes in Dongguan CNC processing plant, the failure caused by improper heat treatment accounts for more than 50%. Practice has proved that advanced die materials must be matched with the correct heat treatment process, in order to give full play to the potential of materials. The purpose of surface strengthening treatment of die working parts is to obtain the effect of external hardness and internal toughness, so as to get a good match of hardness, wear resistance, toughness and fatigue strength. There are many ways to strengthen the surface of mould, and the new technology of surface treatment is developing rapidly. Chemical vapor deposition (CVD) and physical vapor deposition (PVD) have been gradually adopted except nitrocarburizing, ion nitriding, boronizing, niobium, vanadium, hard chromium plating and electric spark strengthening. After CVD and PVD treatment, the die surface is covered with a layer of superhard materials, such as tic, tin, etc. High hardness, wear resistance, corrosion resistance, anti adhesion is very good, can improve the service life of the mold several times to dozens of times.
Influence of manufacturing accuracy of stamping die parts on die life
The precision of die manufacturing is closely related to its service life, especially the surface roughness of die. If the blanking die is made of Crl2MoV steel, if the surface roughness value r = 1.6 m, its service life is about 30000 pieces. If the surface roughness R is 0.4 m, the service life can be increased to 40000-50000 pieces. Therefore, the surface of die working parts in Dongguan CNC processing plant generally has to go through grinding, grinding, polishing and other finishing and fine processing.
Influence of other aspects on die life
(1) The accuracy of the press is not high, and it is easy to damage the die.
(2) The correct installation of the die on the press and the technical level of the operator also have a great influence on the life of the die.
(3) The storage and maintenance of the die, as well as the use of lubricants, also affect the service life of the die.
Conclusion
In the actual production of Dongguan CNC processing plant, abnormal wear and tear rarely occurs when the thin plate die is used. But for the thick plate die, it is easy to appear abnormal wear, we always research and summarize the problems. Because a pair of cold stamping die, from design, manufacturing, assembly, debugging to installation, use, all cost a lot of man hours, at the same time, the punch and die materials, mostly high-quality alloy steel. Therefore, the cost of the die is relatively high. Therefore, it is of great practical significance to understand the factors affecting die life and take corresponding countermeasures to guide production. Dongguan CNC processing plant is really good and worthy of attention