Automobile steering knuckle forging process

A technology of automobile steering knuckle and process, which is applied in the direction of vehicle parts, railway car body parts, transportation and packaging, etc. It can solve the problems of difficult filling, uneven distribution, and hypertrophy of forgings between forgings, so as to achieve increased strength, low cost, Solve the effect of rough edges

Inactive Publication Date: 2015-04-29
丹阳市米可汽车零部件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the vehicle is running at high speed, the vibration transmitted from the road surface to the steering knuckle through the tires is the main factor considered in our analysis. The application number is CN2010519605.3, an invention patent with excellent heat sealing performance, good adaptability and flexibility However, the forgings produced by this forging process are difficult to fill, creases appear, and the burrs are hypertrophic; the bad material moves back and forth in the cavity, causing a large amount of metal to flow horizontally, making it unevenly distributed, thus resulting in low strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The process is carried out in eight steps. Firstly, (1) blanking: it is divided into four steps: rough cleansing, impurity removal, fine cleansing and feeding. The tool used in the rough cleansing process is sandpaper, and the material used in the impurity removal process is 35% dilute sulfuric acid, the material used in the fine cleansing process is washed twice with 100ml distilled water, and then (2) preliminary heating: heat to 450°C at a heating rate of 50°C / h and keep it for 30 minutes, then Carry out (3) billet making: including two steps of air filtration and temperature rise, wherein the gas used for air filtration is nitrogen, and the temperature rise process is heated to 490°C at a heating rate of 10°C / h, and kept for 30 minutes, and then carried out ( 4) Subsequent heating: Heating to 520°C at a heating rate of 5°C / h, and keeping it for 20 minutes, and then performing (5) bending and final forging, using a 3T die forging hammer, and then performing (6) hot tr...

Embodiment 2

[0028] Repeat Example 1 according to the same steps as described, the difference is: the material used in the impurity removal process in step (1) is 37.5% dilute sulfuric acid, the material used in the fine cleansing process is 125ml distilled water rinsed 3 times, and the step ( In 2), heat up to 475°C at a heating rate of 55°C / h and keep it for 35 minutes; in step (3) heat up to 500°C at a heating rate of 15°C / h and keep it for 35 minutes, then Carry out (4) subsequent heating: heat to 523°C at a heating rate of 8°C / h, and keep it for 20-40 minutes, adjust the temperature to 533°C in the temperature adjustment process in step (6), and normalize in step (7) Process heating to AC 3 Above 50°C and keep for 2h.

Embodiment 3

[0030] Repeat Example 1 according to the same steps described, the difference is: the material used in the impurity removal process in step (1) is 38% dilute sulfuric acid, the material used in the fine cleansing process is 150ml distilled water rinsed 4 times, the step ( In 2), heat up to 480°C at a heating rate of 60°C / h and keep it for 40 minutes. In step (3), heat up to 510°C at a heating rate of 20°C / h and keep it for 40 minutes. Carry out (4) subsequent heating: heat to 525°C at a heating rate of 10°C / h, and keep it for 40 minutes, adjust the temperature to 535°C in the temperature adjustment process in step (6), and adjust the temperature to 535°C in the normalizing process in step (7) Heat to AC 3 Above 60°C and keep for 4h.

[0031] Test items Example 1 Example 2 Example 3 Standard Premium Compressive strength (MPa) 1500 1620 1340 1360 Coefficient of friction (mm) 0.20 0.28 0.25 0.18 Elastic modulus (MPa) 4.3×10 -- --- 5 4....

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PUM

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Abstract

The invention discloses an automobile steering knuckle forging process and relates to the field of production of automobile accessories. The automobile steering knuckle forging process includes steps of feeding, initially heating, making blank, successively heating, bending and molding a terminal, hot trimming, hot treating and blasting. The feeding process effectively solves the quality problem caused by impurities in materials by roughly cleaning the surface, removing the impurities and finely cleaning. The automobile steering knuckle forging process is simple, convenient, low in cost and very good in cleaning effect. By cooling in two stages and separately making the blank and bending, forged parts are filled easily without fold lines, and the problem of burrs is solved by polishing. By normalizing and annealing, metal is uniformly distributed, product strength is improved, and quality, reliability and safety of products are effectively improved.

Description

technical field [0001] The invention belongs to the field of auto parts production, and more specifically, the invention relates to a forging process of an automobile steering knuckle. Background technique [0002] The steering knuckle is one of the main parts on the steering axle of the car, which can make the car run stably and transmit the driving direction sensitively. The function of the steering knuckle is to bear the front load of the car, support and drive the front wheel to rotate around the kingpin to make the car turn. When the car is running, it bears variable impact loads, so it is required to have high strength. The steering knuckle is connected to the body through three bushes and two bolts, and through the brake steering knuckle mounting hole of the flange Connected to the braking system. When the vehicle is running at high speed, the vibration transmitted from the road surface to the steering knuckle through the tires is the main factor considered in our a...

Claims

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Application Information

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IPC IPC(8): B21K7/12
Inventor 丁益平
Owner 丹阳市米可汽车零部件厂
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