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Characteristics of E-bolt forgings E-bolts are the execution parts on the scraper conveyor. The working conditions are very harsh, so high strength, toughness and wear resistance are required. It can be seen from the forging drawing that the piece has the following characteristics: it consists of a beam and three cylinders, and the whole is in a "three-tooth" shape.
1) The beam has a rectangular cross section and has four protrusions. The three cylinders must ensure straightness and coaxiality. 2) All three cylinders except the head need to be machined, the rest are all black skin. 3) According to the classification method of forging shape complexity at home and abroad, that is, according to the ratio of forgings to weight-bearing weight, the value is at S4 level, which is the most complicated level.
First of all, in order to ensure the quality of the forging, to prevent the quality defects caused by scale on the forging surface, our company uses medium frequency induction furnace heating, which improves the thermal permeability of the blank and reduces the forging defects such as overheating, overburning, oxidative decarburization. .
In addition, how to carry out multi-step work on a die forging hammer to meet the molding conditions of the E-bolt is the key to the problem. Due to the particularity of the forging, it is necessary to adopt a die forging method of first bending, then pre-forging, and finally final forging. The press bending die is used to bend the original blank or the deformed blank to conform to the shape of the die forging die.
The pre-forging die is used to obtain a shape similar to that of the forging, and its main functions are as follows: 1) Reduce the wear of the final forging die and increase its service life. 2) Make the metal easy to fill the final forging die, avoid the defects of filling and reduce the loss of flash. 3) Improve the flow of metal in the final forging die to avoid defects such as creases on the forging.
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