Forging process of gear ring

A process and ring gear technology, applied in the field of forging, can solve problems such as uneven wall thickness, poor meshing, ellipse, etc., and achieve the effect of uniform wall thickness, high forging precision, and improved service life

Inactive Publication Date: 2015-08-12
JIANGSU JINYUAN FORGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ring gear is a thin-walled ring forging. During the forging process, problems such as uneven wall thickness, folding, and ellipse are prone to occur, resulting in poor meshing and damage to the ring gear when rotating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] A forging process for a ring gear, characterized in that the ring gear is composed of the following components in terms of weight percentage: carbon 0.38 silicon 0.15 manganese 0.75 phosphorus 0.015 sulfur 0.01 chromium 0.80 molybdenum 0.15, and the balance is iron; the forging The process includes the following steps: 1), the first fire heats the steel ingot with the above composition to 1150°C, heats it for 0.5 hours, presses the jaws, chamfers the edges, and displaces the nozzle; 2), the second fire is for the billet obtained in step 1). The material is reheated to 1100°C, upsetting and elongated; 3), the third fire is to reheat the billet obtained in step 2), heated to 1050°C, upsetting, rotary flattening, punching, expanding Hole; 4), the fourth fire reheats the billet obtained in step 3) to 1020°C, upsetting the die ring to the process size, ejecting the mold, expanding the hole to the process size, trimming, finishing, and controlling the total forging Ratio 4.2;...

Embodiment 2

[0008] A forging process for a ring gear, characterized in that the ring gear is composed of the following components in weight percentage: carbon 0.40 silicon 0.20 manganese 0.95 phosphorus 0.025 sulfur 0.02 chromium 0.90 molybdenum 0.20, and the balance is iron; the forging The process includes the following steps: 1), the first fire heats the steel ingot with the above composition to 1150°C, heats it for 0.5 hours, presses the jaws, chamfers the edges, and displaces the nozzle; 2), the second fire is for the billet obtained in step 1). The material is reheated to 1120°C, upsetting and elongated; 3), the third fire is to reheat the billet obtained in step 2), heated to 1060°C, upsetting, rotary flattening, punching, expanding Hole; 4), the fourth fire reheats the billet obtained in step 3) to 1030°C, upsetting the die ring to the process size, ejecting the mold, expanding the hole to the process size, trimming, finishing, and controlling the total forging Ratio 4.5; 5), heat...

Embodiment 3

[0010] A forging process for a ring gear, characterized in that the ring gear is composed of the following components in terms of weight percentage: carbon 0.43 silicon 0.35 manganese 1.00 phosphorus 0.033 sulfur 0.035 chromium 1.10 molybdenum 0.25, and the balance is iron; the forging The process includes the following steps: 1), the first fire heats the steel ingot with the above composition to 1150°C, heats it for 0.5 hours, presses the jaws, chamfers the edges, and displaces the nozzle; 2), the second fire is for the billet obtained in step 1). The material is reheated to 1130°C, upsetting and elongated; 3), the third fire is to reheat the billet obtained in step 2), heated to 1080°C, upsetting, rotary flattening, punching, expanding Hole; 4), the fourth fire reheats the billet obtained in step 3) to 1050°C, upsetting the die ring to the process size, ejecting the mold, expanding the hole to the process size, trimming, finishing, and controlling the total forging Ratio 5; ...

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PUM

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Abstract

The invention relates to a forging process of a gear ring. The process includes following steps that: 1) in first firing, an ingot is heated to 1150 DEG C, and the ingot is subjected to heat preservation for 0.5 hour, dead head pressing, chamfering and sprue filing are performed on the ingot; 2) in second firing, re-heating, upsetting and drawing out are performed on the machined ingot; 3) in third firing, re-heating, upsetting, rotary flattening, punching and reaming are performed on the machined ingot; 4) in fourth firing, the machined ingot is re-heated, upsetting is performed on the machined ingot in a mold ring so that the machined ingot can be in a technique size, the mold is removed, and reaming is performed on the machined ingot so that the machined ingot can be in a technique size, and truing is performed, and machining is completed; 5) heat treatment is performed: the machined ingot is heated to 860 DEC C to 880 DEC C, and heat preservation is performed on the machined ingot for 5 to 5.5 hours, and the machined ingot is subjected to air cooling to 520 DEC C, and the machined ingot is heated to 610 DEC C to 630 DEC C, and heat preservation is performed on the machined ingot for 2 to 2.5 hours, and the machined ingot is subjected to air cooling to 260 DEC C. The forging process has high precision. With the forging process adopted, thickness of the wall of the gear ring can be uniform, and the service life of the gear ring can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a forging process of a ring gear. Background technique [0002] The ring gear is mostly used for the transmission of the production line, and its quality is directly related to the normal operation of the entire production line. The ring gear is a thin-walled ring forging. During the forging process, problems such as uneven wall thickness, folding, and ellipse are prone to occur, resulting in poor meshing and damage to the ring gear during rotation. Contents of the invention [0003] The purpose of the present invention is to solve the above-mentioned technical problems, and to provide a forging process of the ring gear, which has high forging precision and uniform wall thickness. The technical solution is as follows: a forging process of a ring gear, characterized in that the ring gear is composed of the following components in weight percentage: carbon 0.38-0.43 ...

Claims

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Application Information

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IPC IPC(8): B21K1/30
CPCB21K1/30
Inventor 葛艳明杨志华彭振
Owner JIANGSU JINYUAN FORGE
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