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Method for forming hollow front shaft

A front axle and hollow technology, applied in the field of hollow front axle forming, can solve the problems of high heat energy consumption, heavy front axle weight, large equipment tonnage, etc., and achieve the effects of less investment in equipment, quick changeover, and low cost for changeover

Active Publication Date: 2011-11-16
FAW GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The common feature of these processes is that heavy equipment is used to roll forge billets and hot forge forming of solid materials, which consumes a lot of materials, heat energy, large tonnage of equipment, heavy weight of the formed front axle, and high cost of the front axle.

Method used

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  • Method for forming hollow front shaft
  • Method for forming hollow front shaft

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: A truck front axle, which is a part of a medium-sized truck

[0019] The main parameters of the front axle:

[0020]

[0021] Among them, B: the width of the rectangular section in the middle area of ​​the front beam, B1: the height of the rectangular section in the middle area of ​​the front beam, L: the length in the middle area of ​​the front beam, D: the diameter of the kingpin at both ends of the front axle, T: the wall thickness of the tube blank.

[0022] The forming process adopted by the front axle is as follows:

[0023] 1. Cut the seamless steel pipe with the axle housing diameter of Φ121mm into the front axle product drawing with a band saw machine, plus the necessary processing allowance to determine the required length according to the principle of constant volume;

[0024] 2. Inductively heat the cut pipe end and transition area to 800-1050°C with a medium frequency induction heating furnace;

[0025] 3. The pipe end and the transition sec...

Embodiment 2

[0031] Embodiment 2: The front axle of a certain truck is a part of a certain medium-sized truck

[0032] The main parameters of the front axle:

[0033]

[0034] Among them, B: the width of the rectangular section in the middle area of ​​the front beam, B1: the height of the rectangular section in the middle area of ​​the front beam, L: the length in the middle area of ​​the front beam, D: the diameter of the kingpin at both ends of the front axle, T: the wall thickness of the tube blank.

[0035] The forming process adopted by the front axle is as follows:

[0036] 1. Cut the seamless steel pipe with the axle housing diameter of Φ194mm into the front axle product drawing with a band saw machine, plus the necessary processing allowance to determine the required length according to the principle of constant volume;

[0037] 2. Inductively heat the cut pipe end and transition area to 800-1050°C with a medium frequency induction heating furnace;

[0038] 3. The pipe end and...

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Abstract

The invention relates to a method for forming a hollow front shaft, which is characterized in that the specific process is as follows: (1) firstly blanking a pipe section, adopting a band sawing machine and the like to cut a circular pipe material into a fixed-scale pipe blank in a required size, (2) utilizing a medium frequency induction heating furnace to heat pipe ends and a transition region of the cut pipe blank; (3) utilizing a special diameter-reducing machine to perform extrusion and diameter reduction or utilizing a rotary forging device to perform diameter reduction forming on the pipe ends and the transition region through a rotary extrusion and diameter reduction process; (4) carrying out upset forging and forming on the pipe ends; (5) heating the whole; (5) forming the whole; and (7) machining main pin holes at two ends of a pipe. The method for manufacturing a hollow front shaft through the forming process of a pipe blank is simple in manufacturing process, easy to realize the standardization of a mold, fast to remodel, few in production steps, light in weight of a front beam, low in remodeling cost, short in production preparation time and low in cost.

Description

technical field [0001] The invention relates to a method for forming a hollow front axle, which belongs to the field of truck front axle manufacture. Background technique [0002] At present, the front axle of trucks is generally formed by hot forging of solid materials, and the processes include 1. Die forging process on hammer; 2. Die forging process on mechanical press; 3. Forming roll forging process; . [0003] Hammer die forging process: billet heating - roll forging billet (930mm roll forging machine) - die forging: bending, final forging (16T die forging hammer) - eager cutting flash (12.5MN closed single point press) ——Correction (16MN hydraulic press) [0004] Die forging process on mechanical press: billet heating——roll forging billet (——die forging: bending, pre-forging, final forging (125MN double crank mechanical press, one manipulator on the left and right)—— eager cutting flash (12.5MN Closed double-point press)——Hot precision positive (15MN double crank ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
Inventor 徐成林朱伟成富壮王广盛宋宝阳刘世宝孙树奎唐泽迁付成林王建生谢连庆王丽芬李海平韩强李军李汉盈
Owner FAW GROUP
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