Production technology of planetary gear forgings

Planetary gear forging is an important mechanical part, which is widely used in various mechanical transmission systems. Because of its advantages of high strength, high precision and wear resistance, it is widely used in automotive, aviation, energy and other fields. This paper introduces the production technology of planetary gear forgings.

First, raw material preparation

The production of planetary gear forgings first needs to prepare raw materials. Usually, planetary gear forgings are made of alloy steel, stainless steel and other materials. According to different design requirements, the steel that meets the material specifications is selected, and the pre-treatment work such as cutting and grinding is carried out to prepare for the subsequent forging process.

Two, billet heating

The pre-treated billet is put into the furnace for heating treatment. The purpose of heating is to make the blank softer and easier to forge. At the same time, heating can also improve the plasticity of the material and reduce the difficulty of forging. In the heating process, it is necessary to pay attention to control the heating temperature and time to ensure that the billet is fully softened to avoid uneven heating or overheating.

Three, forging molding

After the billet is heated, it is put into the forging equipment for forming processing. The shape and dimensional accuracy of planetary gear forgings are required to be high, so multi-pass forging processing is required. In the forging process, it is necessary to pay attention to controlling the forging temperature and deformation amount to ensure that the deformation amount of each pass meets the requirements to achieve the required shape and dimensional accuracy. At the same time, it is also necessary to pay attention to avoid defects such as over-burning and cracks.

Four, cooling treatment

After forging, it is necessary to cool the planetary gear forgings. The purpose of cooling is to quickly cool the forging to avoid defects such as quenching cracks. Usually, planetary gear forgings are cooled by water or oil cooling. In the cooling process, it is necessary to pay attention to control the cooling speed and time to ensure that the forging is fully cooled, while avoiding the phenomenon of uneven cooling or supercooling.

5. Heat Treatment

In order to improve the performance and service life of planetary gear forgings, heat treatment is required. The purpose of heat treatment is to change the internal structure of the material and improve its mechanical properties and corrosion resistance. Planetary gear forgings usually need to be quenched, tempered and other heat treatment processing to obtain the required hardness and toughness and other performance indicators. In the heat treatment process, it is necessary to pay attention to the control of heating temperature, holding time and other parameters to ensure that the heat treatment effect meets the design requirements.

6. Processing and inspection

After heat treatment, the planetary gear forgings need to be processed and inspected. According to the design requirements, the forging is roughed and finished to achieve the desired shape and dimensional accuracy. At the same time, the quality of the forging is inspected to check whether there are cracks, pores and other defects. If a defect is found, it needs to be treated and re-inspected until it is qualified.

Seven, surface treatment

Finally, the surface treatment of planetary gear forgings is carried out to improve its corrosion resistance and aesthetics. Usually, the surface treatment is carried out by shot blasting, sand blasting, painting, etc. In the surface treatment process, it is necessary to pay attention to controlling the treatment temperature, pressure and other parameters to ensure that the surface treatment effect meets the design requirements.

In summary, the production process of planetary gear forgings includes raw material preparation, billet heating, forging, cooling treatment, heat treatment, processing and inspection, and surface treatment. Each link requires strict control of process parameters and operating methods to ensure that the produced planetary gear forgings have the advantages of high strength, precision and wear resistance. At the same time, with the continuous progress of science and technology and technological innovation, the production process of planetary gear forgings will continue to be optimized and improved.