wheel blank forging

What Are the Wheel Blank Forging Principles?

Wheel forging blank processing is the first process of wheel forging production, forging blank quality, productivity level, will have an important impact on the quality of wheel forging, performance, life and enterprise economic benefits. The quality of forging blank is determined by the processing technology, 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. Therefore, the choice of forging blank plays a very important role in the whole wheel 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 selection principle of forging blank, there are the following points:

Manufacturability principle

The use requirements of parts determine the shape characteristics of the blank, and a variety of different use requirements and shape characteristics form the corresponding blank forming process requirements. The use requirements of parts are embodied in the external quality of their shape, size, processing accuracy, surface roughness, and internal quality requirements of their chemical composition, metal structure, mechanical properties, physical properties and chemical properties. For the use of different parts, it is necessary to consider the process characteristics of the parts material (such as forging performance, welding performance, etc.) to determine what 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.

Adaptability principle

In the selection of blank forming scheme, the adaptability principle should 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 the parts are different, and the blank type selected is also different. If the internal combustion engine crankshaft is subjected to great tensile, bending and torsional stress during the working process, it should have good comprehensive mechanical properties, so the high-speed and high-power internal combustion engine crankshaft is generally forged with alloy structural steel with good strength and toughness, and the power can be forged with medium carbon steel when the power is small. For the straight shaft with little force and circular surface, it can be formed by direct cutting of round steel.

Principle of taking production conditions into consideration

The forming scheme of forging blank should be selected according to the 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, it should be considered to change the part material and/or blank forming method, which can also be solved by outsourcing processing or outsourcing.

Economic principle

The economic principle is to make the manufacturing cost of materials, energy consumption, wage costs and other costs of parts minimum. When choosing 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 precise the blank, the more difficult and expensive it is to manufacture. 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.