Forging method for six-throw crankshaft

A technology for six-turn crankshafts and forgings is applied in the forging field of six-turn crankshafts, which can solve the problems of low qualification rate, complex shape, easy quality problems, etc., to save energy and cost, reduce scrap rate, and easy to operate. Effect

Inactive Publication Date: 2012-03-21
ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the integration of the crankshaft and the curved diameter and the continuous forging fibers, the overall forging is difficult and the quality of the forgings is high, so the forging is difficult, the shape is complex during the forging process, and quality problems are easy to occur (such as folding 120 ° included angle offset,

Method used

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  • Forging method for six-throw crankshaft
  • Forging method for six-throw crankshaft
  • Forging method for six-throw crankshaft

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Embodiment Construction

[0013] The forging method of the six-flip crankshaft of the present invention will be further described in detail through specific examples below.

[0014] The forging method of crankshaft with six turns comprises the steps:

[0015] a) After upsetting the forging, pull it out to a flat square, and then use a triangular knife to stamp the forging up and down according to the number of segments of the six-turn crankshaft to be forged, and stamp the forging with the same number of segments as the six-turn crankshaft, that is, I ~paragraph VII, get as image 3 Forgings shown;

[0016] b) According to the length of the six-turn crankshaft to be forged, use the short anvil to pre-draw the long and short parts (sections III and V), and then pull the entire forging to the required size;

[0017] c) Twist the corresponding sections (sections II and VI) of the forged piece after drawing to obtain the required forged six-turn crankshaft blank;

[0018] d) Finishing the six-throw cran...

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Abstract

The invention relates to a forging method for a six-throw crankshaft. The method comprises the following steps of: a), after upsetting a forge piece, drawing the forge piece to be flat and square, stamping the top and the bottom of the forge piece by using a triangular knife according to the number of the sections of the six-throw crankshaft needing to be forged, and stamping the forge piece into the same sections as the six-throw crankshaft; b), drawing the longer section of the six-throw crankshaft by using a short anvil according to the length of the six-throw crankshaft needing to be forged, and then integrally drawing the overall forge piece to a required size; c), twisting a corresponding section of the drawn forge piece to obtain a blank of the six-throw crankshaft needing to be forged; and d), performing precision-forging finishing on the blank of the six-throw crankshaft to obtain the six-throw crankshaft needing to be forged. The method is suitable for forging the six-throw crankshaft.

Description

technical field [0001] The invention relates to a forging method of a six-turn crankshaft. Background technique [0002] The structure of the six-turn crankshaft is as follows: figure 1 , figure 2 As shown, it consists of several sections, the crankshaft is 120°, and the included angle is evenly distributed. Large multi-turn crankshafts are mainly used in large engines. Its main function is to convert the force transmitted from the connecting rod into torque. It is the core part of the engine and is widely used in engines in large machinery, chemical industry, locomotives, ships and other industries. Its forging methods include fully assembled, semi-assembled and integral forging methods. Due to the integration of the crankshaft and the curved diameter and the continuous forging fibers, the overall forging is difficult and the quality of the forgings is high, so the forging is difficult, the shape is complex during the forging process, and quality problems are easy to o...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21K1/08
Inventor 杨以振徐卫明顾金才褚耀
Owner ZHANGJIAGANG CITY GUANGDA MACHINERY FORGING
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