Tool and method for forging crank throw on double-action hydraulic press

Abstract

The invention discloses a process equipment and method for forging crank throws on a double-action hydraulic press. The tooling includes an upper closing template, a U-shaped mold cavity, a plate-shaped mold cavity, and a lower closing template. The method is that on the double-acting hydraulic press, the punch in the vertical direction is first connected with the compaction die, and the billet is compacted; then the hydraulic press is returned to the initial position, the compaction die is removed and replaced with a punch, and then the billet is compacted. Forming, after a bell crank is formed, first start the equipment to lift the upper clamping plate and the clamping support frame, and start the horizontal cylinder to open the mold and take out the forging. The invention makes full use of the characteristics of low energy consumption and high efficiency of the double-acting hydraulic press. The design of the tooling greatly shortens the time for mold clamping and opening, and improves the production efficiency. Moreover, the tooling has simple structure, reliable operation, easy processing, and convenient disassembly. At the same time, the method not only It can ensure that the fiber flow direction of the forging is not cut off, so that the quality of the crank throw is improved, the utilization rate of the crank throw material is improved, and the production cost of the crank throw is reduced.

Description

technical field [0001] The invention relates to a process equipment and method for crank throw forming, in particular to a process equipment and method for forging crank throw on a double-acting hydraulic press Background technique [0002] The main core component of large-scale marine internal combustion engines is the crankshaft, which cannot be formed at one time like small and medium-sized crankshafts. Large-scale marine crankshafts are mainly produced by combined methods, and the difficulty of forging combined crankshafts lies in the forging of crank throws. At present, forging crank throws by double-acting hydraulic presses is a relatively advanced and efficient processing method. The crankshaft after machining not only has good rigidity and strength, but also has high dimensional accuracy and shape accuracy. At this stage, block method, ring forging method and pier forging method are mostly used in forging semi-combined large marine crankshafts. crank. The bell cran...

AI Technical Summary

Problems solved by technology

The bell crank forged by the block method has a large margin, high cost, and cuts off the metal fiber of the bell crank, so the forming quality is not high; the forging of the ring forging method is difficult to form, the forming process is complicated, and the equipment and operation technology are very high. According to the requirement, there may be air holes in the crank throw forging after forming, so the practicability is not very strong; the pier forging method requires a set of special forging die and its auxiliary equipment, which is costly and not suitable for small batch production

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