The blank processing of cylinder piston
forging is a process of forging production. The blank quality and productivity of forging will have an important impact on the quality, performance, life and economic benefits of
forging. The blank quality is determined by the forging process, equipment precision and performance. The quality of forging blank directly affects the precision of turning processing, and the quality of turning processing affects the precision and efficiency of grinding.
As an expert in forging processing, we believe that the choice of forging blanks plays a very important role in the entire forging processing, the principle of forging blank selection should be in the premise of meeting the requirements of use, as far as possible to reduce production costs, so that the product has competitive ability in the market.
Next is the choice of forging blank principles, there are the following points.
The use of forging requirements determine the shape characteristics of the blank, a variety of different use requirements and shape characteristics, the formation of the corresponding blank forming process requirements. The use of forging requirements are embodied in the external quality of its shape, size, processing accuracy, surface roughness, and the internal quality requirements of its chemical composition, metal structure, mechanical properties, physical properties and chemical properties. For the use of different forging requirements, it is necessary to consider the process characteristics of the forging material (such as forging performance, welding performance, etc.) to determine which blank forming method to use. While selecting the blank forming method, the machinability of subsequent machining should also be taken into account. Some blanks with complex structure are difficult to be formed by a single forming method, so it is necessary to consider the possibility of combining various forming schemes and whether these combinations will affect the machinability of machining.
In the choice of blank forming scheme, the adaptability principle should also be considered. According to the structure shape, dimension and working conditions of the forging, the blank scheme is selected. For example, for step shaft parts, when the diameter of each step is not much different, rod material can be used; If the difference is large, it is appropriate to use forged blank. The working conditions of forging are different, and the blank type selected is also different.
The forming scheme of forging blanks should be selected according to the on-site production conditions. The field production conditions mainly include the actual process level of the field blank manufacturing, equipment conditions and the possibility and economy of outsourcing, but at the same time, it is also necessary to consider the use of more advanced blank manufacturing methods due to the development of production. For this reason, when blank selection, the existing production conditions of the enterprise should be analyzed, such as equipment capacity and staff technical level, and the existing production conditions should be used as far as possible to complete the blank manufacturing task. If the existing production conditions are difficult to meet the requirements, you should consider changing the forging material and/or blank forming method, which can also be solved by outsourcing or outsourcing.
The economic principle is to make the manufacturing cost of forging materials, energy consumption, wage costs and other costs low. When selecting the type of forging blank and the specific manufacturing method, several preselection schemes should be compared economically under the premise of meeting the requirements of parts use, and the scheme with low overall production cost should be selected. In general, when selecting the type and manufacturing method of the blank, the size and shape of the blank should be as close as possible to the finished part, so as to reduce the processing allowance, improve the utilization rate of materials, and reduce the amount of machining work. But the more blank, the more difficult it is to manufacture, and the higher the cost. Therefore, when the production program is large, the blank manufacturing method with high precision and high productivity should be used, and although the initial investment is large, the increased blank manufacturing costs can be compensated by the reduced material consumption and machining costs. The general rule is that when a single piece of small batch production, free forging, manual arc welding, sheet metal pliers and other forming methods can be used in mass production, machine modeling, die forging, submerged arc automatic welding or other.
Through the above detailed elaboration of the forging blank selection principle, we can clearly understand that reasonable blank selection is crucial to ensure the quality of forging and improve production efficiency. In the pursuit of economic benefits at the same time, we must consider the process, adaptability, production conditions and economy to ensure that the processing of forging blanks both meet the technical requirements and have market competitiveness.
