Free forging forming process and die for large bent knife plate forgings

Abstract

The invention relates to the technical field of forging, and discloses a free forging forming process and die for large bent knife plate forgings. The method comprises the following steps of firstly performing high-temperature free forging forming by using a convex anvil by taking a rectangular billet as an initial blank to obtain a strip-shaped blank with a dumbbell-shaped section; secondly, cutting the long-strip-shaped blank along the center line, and obtaining two prefabricated blanks which are different in thickness on the two sides and are in smooth transition; and thirdly, using a freeforging and finish forging drawing-out die with a flow guide groove and asymmetric baffles on the two sides for conducting high-temperature forging drawing-out on the cut prefabricated blank, the material thickness of the outer side area of the prefabricated blank is reduced, the prefabricated blank extends in the feeding direction, the prefabricated blank is forced to be bent inwards, and therefore the large bent knife plate forgings are obtained through forming. By means of the free forging forming process and die, forging forming of the large bent knife plate forgings is achieved, the forging performance and the material utilization rate can be improved, the equipment load is reduced, the forging forming effect is improved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a free forging forming process and a mold for large machete plate forgings. Background technique [0002] The forming of large machete plate forgings is a major problem in the production of large forgings. Especially for large scimitar forgings of tens of tons or even hundreds of tons, due to their large weight and complex shape, it is difficult to effectively control their forming dimensions and internal properties of the material during the forging process. At present, no reasonable and effective method for large scimitar plate forgings has been found. Forging processing method. The existing processing methods of machete plate parts either use large-size slabs to directly cut them into machete plate parts; Cut a section of the ring according to the size requirements to obtain the required machete plate parts. However, when the size of the machete plate parts is large, the ab...

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Problems solved by technology

However, when the size of the machete plate parts is large, the above method will have many problems: (1) directly cutting the machete plate parts with the slab will cause a lot of material waste, and the internal organization streamline of the part is not continuous, which seriously affects Its service performance; (2) When using the rolling ring or ring forging cutting method to process large machete plate forgings, the size of the workpiece often exceeds the machinable size range of the ring rolling equipment and forging equipment, and the working capacity of the equipment is extremely demanding. High, when the tonnage of the equipment is insufficient, it is difficult to obtain forgings of the required size

In addition, the forging process of large forgings takes a long time and involves many steps, especially the forgings of machetes and plates have fast heat dissipation and cooling, the temperature of the deformation area is difficult to control, and the shape of machetes is difficult to form, which brings difficulties to actual production

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