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Dongguan Goodjob Precision Components Co.,Ltd.

ADD: No.68, Changsheng North Road, Dalang,Dongguan,Guangdong,China

Tel: +86-769-23327726

Fax: +86-769-23327736

Email:info@goodjcnc.com

Forging process
May 07, 2018

Before the forging, a set of forging scheme or process is required, and in the forging process, such a process is used to carry out the forging required for forging. Its specific preparations include raw material selection, calculation, feeding, heating, calculation of deformation force, selection of equipment, and design of molds. In addition, you need to choose a good lubrication method and lubricant before forging.

The materials used for forging involve a wide range of surfaces, ranging from steel and high-temperature alloys of various grades to non-ferrous metals such as aluminum, magnesium, titanium, and copper. As we all know, the quality of products is often closely related to the quality of raw materials. Therefore, for forging workers, they must have the necessary knowledge of materials and be good at selecting suitable materials according to the process requirements.

Let's take a look at the following specific steps for the forging process:

1. Calculating and blanking is one of the important steps to improve material utilization and achieve blank refinement. Excessive materials not only cause waste but also increase mold wear and energy consumption. If the material is not left margin, it will increase the difficulty of process adjustment and increase the rejection rate. In addition, the quality of the blank end face has an effect on the quality of the process and forgings.

2. The purpose of heating is to reduce the forging deformation force and improve the metal plasticity. However, heating also brings a series of problems such as oxidation, decarburization, overheating, and overheating. Accurate control of the forging and final forging temperatures has a great influence on product organization and performance.

3. The flame furnace heating has the advantages of low cost and strong applicability, but the heating time is long, it is easy to produce oxidation and decarburization, and the working conditions also need to be continuously improved. Electric induction heating has the advantages of rapid heating and low oxidation, but it has poor adaptability to changes in product shape and size and material quality.

4. Forming due to forging is produced under the action of external force. Therefore, correct calculation of deformation force is the basis for selecting equipment and checking the mold. Stress and strain analysis of the interior of the deformation body is also indispensable for optimizing the process and controlling the microstructure and properties of the forging.

5. There are four main methods of analysis of deformation force.

(1) Although the principal stress method is not very strict, it is relatively simple and intuitive, and it can calculate the total pressure and the stress distribution at the contact surface between the workpiece and the tool.

(2) The slip line method is rigorous to the plane strain problem. It is relatively straightforward to solve the stress distribution for the local deformation of high parts, but its application scope is narrow.

(3) The upper bound method can give an overestimated load, and the upper limit element can also predict the change in the shape of the workpiece during deformation.

(4) The finite element method can not only give the change of external load and workpiece shape, but also can give the internal stress and strain distribution. The disadvantage is that there are more computer-hours, especially when the elastic-plastic finite element method is used to solve, the computer capacity is needed. Larger, longer time. Recently, there has been a tendency to use joint methods to analyze problems, for example, using the upper bound method for coarse calculations, and using finite element estimates for key parts.