Inclined plane anvil forging connecting rod transition conical face and transition conical face machining method thereof

Abstract

The invention relates to an inclined plane anvil forging a connecting rod transition conical face and a transition conical face machining method thereof. An upper anvil portion is composed of an upper anvil and an upper anvil base, and a lower anvil portion is composed of a lower anvil and a lower anvil base. The lower portion shape of the upper anvil and the upper portion shape of the lower anvil are the same as the shape of a connecting rod machined conical face. A forked tail of the upper anvil of the upper anvil portion is clamped into a forked tail groove in the upper anvil base. The protruding narrow edge of the side face of the lower anvil of the lower anvil portion is arranged in a key groove in the lower anvil base. During machining, the upper anvil base is connected to a pressing machine connecting plate, the lower anvil and the lower anvil base are placed on a pressing machine walking table, a pressing machine is operated, a jaw of a blank operating machine clamps a blank, the blank is rotated, the lower plane of the upper anvil and the upper plane of the lower anvil form a connecting rod middle rod portion and a transition inclined plane, finishing is carried out by an upper flat anvil and a lower flat anvil, log marking and coining are carried out in sequence, and therefore the connecting rod middle transition conical face is formed. A connecting rod forged by the inclined plane anvil is regular in outline, simple in production procedures, high in material utilization rate, good in metal streamline performance, short in machining period and low in production cost. By means of the inclined plane anvil, connecting rods of marine diesel engines of the model number being 50 or larger than 50 can be produced.

Description

technical field [0001] The invention relates to a slope anvil for forging a transition cone surface of a connecting rod and a method for processing the transition cone surface with it. Background technique [0002] As an important part of a large marine diesel engine, the connecting rod has special working conditions and complex forces. It must not only have good mechanical properties, but also ensure a certain shape to meet the needs of special working conditions. [0003] At present, there is a conical surface in the middle of domestic marine connecting rods. The main production method is to use upper and lower flat anvils, free forging, and use traditional flat anvils to forge larger model connecting rods (50 machines and above models), whether forging or later machining. There are many deficiencies: First, in the forging process, because the flat anvil forging is difficult to forge the middle conical surface, the conical transition area between the two ends of the connec...

AI Technical Summary

Problems solved by technology

[0003] At present, there is a conical surface in the middle of domestic marine connecting rods. The main production method is to use upper and lower flat anvils, free forging, and use traditional flat anvils to forge larger model connecting rods (50 machines and above models), whether forging or later machining. There are many deficiencies: First, in the forging process, because the flat anvil forging is difficult to forge the middle conical surface, the conical transition area between the two ends of the connecting rod and the middle rod can only be forged into a flat square step, so that the forged connecting rod, The margin is large, the utilization rate of the steel ingot is low, and after the steel ingot is flattened during forging, it needs to be stamped four times before it can be finally formed. There are many forging processes, long time, high labor intensity and high production cost.

Secondly, in the subsequent machining process, it is necessary to process the transitional flat square step of the connecting rod into a conical slope, which has a large machining allowance, high difficulty, long working hours, and high processing costs. The impact force is large, and the damage to the tool is serious, which further increases the machining cost

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