Method and application of precision die forging.

Precision forging forming technology (net forming) refers to the forging forming layer of the part, only a small amount of processing or no processing will meet the requirements of the part forming technology. Precision forging forming technology is an important part of manufacturing technology, and it is also a widely used parts manufacturing process in automobile, mining, energy, construction, aviation, aerospace, weapons and other industries. Precision forging technology not only saves materials, energy, reduces processing processes and equipment, but also significantly improves productivity and product quality, reduces production costs, and thus improves the market competitiveness of products.

1. Precision forging process method At present, many precision forging processes have been applied to production. According to different forming temperature, it can be divided into hot precision forging, cold precision forging, warm precision forging, compound precision forging, isothermal precision forging and so on.

1-1 Hot Precision Forging process The precision forging process where the forging temperature is above the recrystallization temperature is called hot precision forging. Hot precision forging materials have low deformation resistance and good plasticity, and are easy to form more complex workpieces, but due to strong oxidation, the surface quality and dimensional accuracy of the workpieces are low. The common process method of hot precision forging is closed die forging.

1-2 Cold Precision Forging process Cold precision forging is a precision forging process carried out at room temperature. The cold precision forging process has the following characteristics: the shape and size of the workpiece are easy to control, avoiding the error caused by high temperature; High workpiece strength and precision, good surface quality. Cold forging process, the workpiece plasticity is poor, deformation resistance is large, the mold and equipment requirements, and it is difficult to form the structure of complex parts.

1-3 Warm precision Forging process Warm precision forging is a precision forging process performed at a suitable temperature below the recrystallization temperature. Hot forging precision forming technology not only breaks through the limitations of large deformation resistance in cold forging forming, the shape of the part can not be too complicated, the need to increase the intermediate heat treatment and surface treatment steps, but also overcomes the problem of reducing the surface quality and dimensional accuracy due to strong oxidation in hot forging. It has the advantages of both cold forging and hot forging, and overcomes the disadvantages of both.

1-4 Composite forging process With the increasing complexity of forging parts and the improvement of precision requirements, the simple cold, warm and hot forging process can no longer meet the requirements. The composite precision forging process combines the cold, overflow and hot forging processes to complete the forging of a workpiece together, which can give full play to the advantages of cold, warm and hot forging, and abandon the disadvantages of cold, warm and hot forging.

1-5 Isothermal precision forging process Isothermal precision forging means that the blank is formed by die forging at a temperature that tends to be constant. Isothermal die forging is often used for the precision forming of titanium alloy, aluminum alloy, magnesium alloy and other hard-to-deform materials in the aerospace industry, and in recent years, it is also used for the precision forming of non-ferrous metals in the automotive and machinery industries. Isothermal forging is mainly used in forging metal materials with narrow temperatures, especially titanium alloys that are very sensitive to deformation temperature.

2. Application of precision forging

2-1. Produce refined blanks, and finish the precision die forging parts to the finished parts.

2-2. The production of precision die forging parts, the main part of the precision forging formed parts, eliminating cutting processing, and some parts still need to be less