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Forging process for forge piece

A technology of forgings and crafts, applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problems of insufficient structural strength, poor surface flatness, low finish, etc., achieve fast heating time, increase hardness, The effect of increasing production rate

Active Publication Date: 2017-10-24
TAIZHOU YUPENG MACHINE FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Especially auto parts such as wheel hubs and control arms, they are subjected to variable impact loads when the car is running. Therefore, they are required to have high strength. The problem of low finish and insufficient structural strength, and the heat treatment method of forgings is particularly important for the structural strength of forgings

Method used

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  • Forging process for forge piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step (1) blanking: the forging material is automatically cut into blanks of corresponding length by a fully automatic high-speed circular saw machine;

[0035] Step (2) Heating: put the raw material into the heating furnace, set the heating temperature to 1220±50°C, adopt continuous feeding, and the heating time is 15-30 seconds;

[0036] Step (3) Pre-forging: the blank is placed on the upsetting mold and upset by the punch;

[0037] Step (4) Forging mold forming: put the pre-forged blank in the center of the rough forging cavity of the mold, first hammer with a light hammer, then blow off the scale, and then continuously forge 2-3 hammers;

[0038] Step (5) Trimming: When the temperature of the blank is ≥ 750°C, put the blank into the trimming mold and trim the edge with a punch to form the required forging, and then heat-shape the forging after trimming;

[0039] Step (6) Heat treatment: the first step, normalizing: place the forging in the resistance furnace, make t...

Embodiment 2

[0045] The difference from Example 1 is that step (4) forging die forming: place the pre-forged blank in the center of the rough forging cavity, forge 5-6 times from light to heavy with an electro-hydraulic hammer, and then transfer Forging 2-3 times in the precision forging cavity to form a blank, and remove the scale during forging;

[0046] Punch holes before trimming in step (5);

[0047] Step (6) heat treatment: the first step, quenching, put the forging into the quenching tank 1 for high temperature quenching, the temperature of the quenching oil for high temperature quenching is controlled at 180-200°C, and the temperature of the forging is controlled at 220-240°C after high temperature quenching, after high temperature quenching Place the forging in the air for air cooling. After air cooling, the temperature of the forging is controlled at 160-180°C, and then the air-cooled forging is placed in the quenching tank 1 for low-temperature quenching. The temperature of the ...

Embodiment 3

[0054] The difference from Example 1 is that step (3) pre-forging: the blank is first rolled and drawn out by a semicircular rolling machine for multiple times, and then bent by a press to form a rough blank;

[0055] Step (4) Put the pre-forged blank in the center of the rough forging cavity of the mold, first hammer lightly, then blow off the scale, and then continuously forge 3-5 hammers, and then place the rough forged material Put the embryo into the fine forging cavity and forge 2-3 times;

[0056] Punch holes before trimming in step (5);

[0057] Step (6) Heat treatment: the first step, quenching: the forging after trimming is directly dipped in oil to cool, so that its hardness reaches HRC50-52, the oil temperature in the quenching tank is controlled below 60°C, and the oil temperature is evenly stirred after stirring; the second Step 1, tempering: place the forging in the resistance furnace, make the temperature of the forging reach 675°C±20°C, set the resistance fur...

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Abstract

The invention discloses a forging process for a forge piece and aims to provide a forging process for a forge piece with high structural strength and surface smoothness. According to the technical scheme of the forging process, the forging process for the forge piece is characterized by comprising the following steps of (1) charging, (2) heating, (3) dummying, (4) die forging forming, (5) trimming , (6) heat treatment, (7) surface cleaning, (8) flaw detection and (9) inspection. The forging process is suitable for a forging machining process.

Description

technical field [0001] The invention relates to a forging process of a forging. Background technique [0002] Forging is a processing method that uses forging machinery to apply pressure to metal blanks to cause plastic deformation to obtain forgings with certain mechanical properties, certain shapes and sizes. Forging can eliminate defects such as loose casting of metals during the smelting process. , optimize the microstructure, and because the complete metal flow line is preserved, the mechanical properties of forgings are generally better than castings of the same material. For important parts with high loads and severe working conditions in related machinery, forgings are mostly used, except for plates, profiles or weldments that can be rolled with simpler shapes. [0003] Especially auto parts such as wheel hubs and control arms, they are subjected to variable impact loads when the car is running. Therefore, they are required to have high strength. The problem of low...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21J5/08B21J5/02B21J1/06B21K27/00C21D8/00C21D1/18
CPCB21J1/06B21J5/002B21J5/02B21J5/027B21J5/08B21K27/00C21D1/18C21D8/00
Inventor 张智超罗奇志
Owner TAIZHOU YUPENG MACHINE FORGING
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