Marine crank throw die forging forming method and die

Abstract

The invention provides a marine crank throw die forging forming method and die. The marine crank throw die forging forming die comprises a female die for die forging forming and a male die for in-die upsetting blank making, and a die cavity matched with a crank throw blank in contour shape is formed in the female die; and the male die comprises a first male die body, a second male die body and a third male die body, the first male die body is used for stretching into the die cavity to conduct in-die upsetting, the second male die body is used for stretching into the die cavity to conduct punching operation, and the third male die body is used for stretching into the die cavity to conduct shaping operation. According to the die, the male die bodies used in all stages are designed separately and used in a segmented mode, the crank throw die forging forming force can be obviously reduced, die forging forming of crank throw forge pieces can be completed through a ten-thousand-ton press, the crank throw die forging cost is reduced, the shapes of the formed crank throw forge pieces are more ideal, the machining allowance of die forging crank throws is reduced, and the manufacturing cost is further reduced.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a ship bellcrank die forging forming method and a forming die. Background technique [0002] The crankshaft is an important part of a large and medium-sized marine diesel engine, and is mainly used for the crankshaft in a large and medium-sized marine (over 10,000 tons) diesel engine and a low-speed two-stroke diesel engine for power generation. Since the crankshaft is a key component of large and medium-sized ships, and its shape is complex, the transmission power is large, and it bears alternating loads, it is not allowed to be replaced during the life of the ship. Therefore, the strength, fatigue resistance, impact resistance and other performance requirements of the crankshaft rough forging are very strict. . [0003] With the development of the shipbuilding industry, the forming method of crank throw forgings is also constantly innovating. From the initial complete free for...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem that the existing ship bellcrank die forging method requires relatively large die forging forming force, which increases the manufacturing cost

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