Forging method of precision mold for hardware parts processing
by：QY Precision 2020-04-08
Precision forging and forming technology refers to the part forming technology that can be used with only a little processing or no processing after the parts are basically formed, also known as near-net forming technology. This technology is developed on the basis of conventional forging and forming technology and is an application technology integrated by computer information technology, new energy and new materials. At this stage, precision forging and forming technology is mainly used in precision forging parts and precision blanks. Precision forging and forming technology has obvious advantages, low cost, high efficiency, energy saving and environmental protection, and high precision. There are many kinds of forming processes, which are divided according to the forming speed: high-speed precision forging, General Precision Forging, slow precision forging, etc; Based on the metal flow in the forging process, it is divided into semi-closed, closed and open precision forging processes; According to the forming temperature: Super plastic, room temperature, medium temperature, high temperature precision forging, etc; According to the forming technology, it can be divided into: shunt forging, isothermal forging, re-dynamic forging, composite forming, warm precision forging forming, hot precision forging forming and cold precision forging forming. The division of precision forging technology according to forming technology has become a customary classification method in production. 1. Warm precision forging forming technology is a kind of precision forging technology that finds a suitable temperature below the crystallization temperature as the processing temperature. When selecting temperature, it is better to choose when the metal plastic deformation is better, and before strong oxidation occurs. 2. Hot precision forging forming hot precision forging forming technology is a precision forging technology that finds a suitable temperature above the crystallization temperature as the processing temperature. However, compared with the warm precision forging technology, it will undergo severe oxidation due to the high selected temperature, resulting in poor surface quality and insufficient forging accuracy. 3. Cold precision forging metal material without heating, called cold forging, mainly has two technologies: cold heading extrusion and cold extrusion. Compared with other processes, its advantages are that the shape of the workpiece is easy to grasp, and there is no deformation caused by high temperature. The disadvantages are large impedance and poor plasticity of the workpiece during the deformation process. 4. Composite precision forging forming composite precision forging forming process refers to the integration of techniques using multiple forging methods, or the combination of other material forming techniques and forging processes. The processing materials and parts of the traditional process have great limitations. The composite process developed on the basis of the traditional process can not only foster strengths and circumvent weaknesses, but also expand the scope of the processing object. 5. Isothermal forging isothermal forging refers to the process of forging the embryo into a precision forging part at a constant temperature. Compared with conventional forging, isothermal forging can control the heating temperature of the blank within a certain range, so that the temperature in the forging process is roughly equal, the plastic change of the mold due to sudden temperature change during processing is greatly improved. Due to the technological characteristics of isothermal forging, it is especially suitable for precision forging of materials sensitive to deformation temperature or materials difficult to form, such as magnesium alloy and aluminum alloy. 6. An important part of the diversion forging technology is to establish a diversion channel for materials in the forming part of the mold or blank to ensure a good filler effect. When using this technology, in the process of filling the material in the cavity, some materials leave a shunt channel to form a shunt, which helps to fill the difficult part. The advantage of shunt forging is that this technology can avoid the sealing device, has a good forming effect when forming gear parts, can achieve the required accuracy, and does not require reprocessing after forming, mold Life is long. 7. Complex forging complex forging is also called block forging, which is one of the more advanced precision forging technologies. This technology is made by one-way extrusion of a punch in a closed groove or two-way re-extrusion of two punches to make the metal one-time, and the molded parts belong to a near-clean precision forging without a flash. The reason for using block forging is to increase the material utilization rate and reduce the complexity of the processing process. The occlusion forging can form a complex profile through one operation and obtain a large amount of deformation. It can save most of the cutting and effectively reduce the cost when producing complex parts.