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Hot forging method for transmission shaft yoke with horizontal yoke part

A transmission shaft and fork technology, which is applied in the field of hot forging of transmission shaft joints, can solve the problems of inconvenient process implementation, high mold material requirements, complex mold structure, etc., so as to save machining processes and flash metal The effect of low consumption and stable process

Active Publication Date: 2013-05-29
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process uses a closed die, which has a large extrusion force and high requirements on the die material; the die structure is complex and the manufacturing cost is high; and the billet size needs to be strictly controlled, so the process implementation is not convenient

Method used

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  • Hot forging method for transmission shaft yoke with horizontal yoke part
  • Hot forging method for transmission shaft yoke with horizontal yoke part
  • Hot forging method for transmission shaft yoke with horizontal yoke part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The finished product that this embodiment makes is as figure 1 As shown, the hot forging method, the step sequence includes: blanking, heating, flat die flattening twice, pre-forging bending, final forging forming and edge trimming. Specifically, it is achieved through the following methods:

[0034] Step 1, blanking: use round bar material to saw and blank, and the ratio of height to diameter of the blank is not greater than 1.5;

[0035] Step 2. Preheating the mould: heating the pre-forged and bent pre-forging dies and final forging dies to keep the die temperature at 200°C to 300°C;

[0036] Step 3. Heating the billet: place the billet in an intermediate frequency furnace and heat it to 1100°C to 1150°C;

[0037] Step 4. Flatten the flat mold twice: place the billet horizontally, flatten the flat mold, then rotate it 90° and then flatten it again, make the blank into a long strip shape, and control the thickness of the end at 50mm to 55mm after flattening;

[0038...

Embodiment 2

[0052] A certain type of drive shaft yoke is made of SAE1141 alloy steel, and the processing equipment is a 40000kN hot die forging press. The process is as follows:

[0053] 1. Blanking: Round bar material is used for sharp cutting and blanking, and the blank size is Φ70×134mm;

[0054] 2. Preheating the mold: heat the pre-forging mold and the final forging mold, and heat the mold to 220°C;

[0055] 3. Heating the billet: place the billet in an intermediate frequency furnace and heat it to 1100°C;

[0056]4. Flattening of the flat mold: put the blank horizontally, and flatten the flat mold for the first time, adjust the thickness of the lower backing plate 9, control the reduction to 20mm, then rotate 90° and then flatten the flat mold once, and shoot the blank In the shape of a long strip, the thickness of the end after being flattened is 50mm;

[0057] 5. Pre-forging and bending: place the strip-shaped blank in a bending die with a specific shape, and perform bending and ...

Embodiment 3

[0062] A certain type of drive shaft yoke is made of SAE1141 alloy steel, and the processing equipment is a 40000kN hot die forging press. The process is as follows:

[0063] 1. Blanking: Round bar material is used for sharp cutting and blanking, and the blank size is Φ70×134mm;

[0064] 2. Preheating the mold: heat the pre-forging mold and the final forging mold, and heat the mold to 250°C;

[0065] 3. Heating the billet: place the billet in an intermediate frequency furnace and heat it to 1150°C;

[0066] 4. Flattening of the flat mold: place the billet horizontally, flatten the flat mold for the first time, adjust the thickness of the lower backing plate 9, control the reduction to 15mm, then rotate 90° and then flatten the flat mold once, and clap the blank In the shape of a long strip, the thickness of the end after being flattened is 55mm;

[0067] 5. Pre-forging and bending: Place the strip-shaped blank in a bending die with a specific shape for bending and flattening...

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Abstract

The invention provides a hot forging method for a transmission shaft yoke with a horizontal yoke part, and belongs to the technical field of forging forming. Preform bodies are sequentially conducted flat-die flatten, preforging bending and finishing forging forming. The flat-die flatten is that the preform bodies which are horizontally arranged in a flat-die are flattened to form strip shapes, the preforging bending is that the strip-shaped preform bodies are arranged in a bending die with a specific shape, and the strip-shaped preform bodies are bended and flattened to form preforging parts. Compared with horizontal open type die forging, axial blind holes are directly forged on the transmission shaft yoke prepared by the hot forging method for the transmission shaft yoke with the horizontal yoke part, follow-up machining working procedures are omitted, trimming metal consumption is small, and material utilization is more than 85%. Compared with vertical type hot extrusion forming, the process of the hot forging method for the transmission shaft yoke with the horizontal yoke part is convenient to implement, and stable in process. Dies are relatively simple and low in manufacturing cost.

Description

technical field [0001] The invention relates to a method in the technical field of forging, in particular to a hot forging method of a transmission shaft yoke with a horizontal fork. Background technique [0002] The transmission shaft fork is a key component in the transmission mechanism of the automobile. It needs to bear a large load during the transmission process, and the working conditions are poor. Therefore, such parts require high strength and good toughness. The manufacturing method of cutting is low in efficiency and difficult to meet its mechanical performance requirements. It is generally forged from high-quality alloy steel. [0003] After searching the existing technology, it was found that the "Forging Technology" in the 06th issue of 2010 disclosed "Research on the Precision Die Forging Process of Automobile Drive Shaft Forks", which recorded that the open die forging process of horizontal splitting is often used in the production of drive shaft forks For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J1/04B21J13/02
Inventor 胡成亮赵震资小林黄春曾凡吴公明郭增均
Owner SHANGHAI JIAO TONG UNIV
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