Forming method realized by once die closing and repeated local loading

Abstract

The invention discloses a forming method realized by once die closing and repeated local loading. The forming method comprises the specific steps of placing a heated workblank in a lower concave die; enabling an upper concave die to descend to contact with the lower concave die until the upper concave die is combined with the lower concave die, and performing the workblank in the die; repeatedly beating the workblank in a cavity locally by using an upper punch and a lower punch, and enabling the metal of the workblank in the cavity to flow along the radial direction of the cavity under the action of the punches; and gradually filling the cavity by using the workblank until the workblank is formed in the cavity. According to a once die closing and repeated local loading beating mode, the workblank is formed in an accumulated manner by repeated local loading, the weight of equipment is greatly reduced, the service life of the die is prolonged, and the dimensional accuracy of parts is the same with that of parts which are precisely formed in a closed environment. The forming method realized by once die closing and repeated local loading is an integrated innovation on equipment and technology, the material using ratio is high, the structure property is also high, the requirement on the weight of the equipment is low, materials and energy are saved, and the forming method is particularly suitable for forming complex parts such as forked branches which are difficult to form.

Description

technical field [0001] The invention relates to the technical field of metal plastic forming, in particular to a method for metal hot forging precision forming, which belongs to a new method for metal precision forming. Background technique [0002] Typical fork forgings (such as cross shafts), disk forgings (such as gears, star sleeves), claw forgings (automobile power generation claw poles), etc., the traditional processing method adopts open die forging, and the formed flash More, the material utilization rate is low; after forming, follow-up processing is required to meet the precision requirements of the parts, and there are many processes and waste of raw materials. For example, if some precision parts of cars, such as planetary and side shaft gears, star sleeves, cross bearings, etc., are processed by cutting, not only the material utilization rate is very low-an average of less than 40%, but also it takes a lot of man-hours and the production cost is extremely high. ...

AI Technical Summary

Problems solved by technology

[0004] In order to effectively solve the problems of low material utilization rate, many processes, waste of raw materials, large equipment tonnage, high equipment investment cost, and high energy consumption in metal plastic forming in the background technology, the present invention provides multiple partial loading forming for one mold clamping. The new method of using multiple local loading methods makes the processing of parts more reasonable and innovates the manufacturing process of such parts

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