With the rapid development of construction machinery industry, the demand for construction machinery forging die is increasing. As an important tooling equipment, mold plays an important role in forming, stamping and other processes in the production process. The quality of the die directly affects the manufacturing quality and performance of the construction machinery products, therefore, precision machining technology is crucial for the construction machinery forging die.
First of all, it is necessary to consider the requirements of the working environment and the service life of the mold when selecting the mold material. Common mold materials are cast iron, alloy steel, high-speed steel and so on. Cast iron is widely used in the field of mold manufacturing. It has good machinability and wear resistance. Alloy steels perform well in terms of hardness and wear resistance and are suitable for situations where high die strength is required. High speed steel has excellent cutting performance and wear resistance, which is suitable for the manufacture of complex structures and high precision molds.
Secondly, precision machining technology is an indispensable link in mold processing. Precision machining technology includes CNC machining, electric discharge machining, wire cutting machining and so on. CNC machining has the characteristics of high efficiency and high precision, which can realize the precision machining of mold shape. The material is stripped by electric pulse discharge in EDM, which is suitable for the manufacture of mold with complex shape. Wire cutting adopts conductive silk wire as electrode for mold cutting, which is suitable for mold processing of high hardness materials. In the selection of processing technology, it is necessary to make reasonable selection according to the specific situation to ensure processing accuracy and efficiency.
In addition, mold design is also an important part of mold precision machining. When designing the mold, it is necessary to consider the structural rationality, processing convenience and durability of the mold. Reasonable mold design can improve the service life and production efficiency of the mold. At the same time, it is also necessary to carry out reasonable design according to the shape, size and requirements of different parts of construction machinery forgings to ensure that the mold can meet the manufacturing requirements of the product.
Heating treatment is also an indispensable step in mold precision machining. The microstructure of the die material can be changed by heating treatment, and its hardness and wear resistance can be improved. Commonly used heating treatment methods are quenching, tempering and so on. Quenching can make the mold material obtain higher hardness and strength, but also increase brittleness; Tempering can reduce the brittleness caused by quenching, and improve the toughness and impact resistance of the mold. In the heating treatment need to master the appropriate temperature and holding time to ensure that the mold material to obtain the ideal mechanical properties.
Finally, after the precision machining of the mold is completed, it is also necessary to carry out surface treatment to improve the wear resistance of the mold and extend the service life. Common surface treatment methods are nitriding, electroplating, coating and so on. Nitriding can form high hardness nitriding layer, improve the wear resistance and corrosion resistance of the mold surface; Plating and coating can increase the surface hardness and lubricity of the mold and reduce the friction between the mold and the workpiece. Choosing the right surface treatment method can improve the service life and work efficiency of the mold according to different working environments and processing requirements.
In short, the precision machining technology of die materials for construction machinery forging dies is a complex and critical process. Through scientific and reasonable selection of mold materials, precision machining technology and appropriate mold design, heating treatment and surface treatment, high-quality and high-precision molds can be manufactured to meet the needs of the construction machinery industry for molds. In the actual operation process, it is also necessary to pay attention to safety and carry out the necessary quality inspection to ensure the reliable quality of the mold and provide strong support for the development of the construction machinery industry.
