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Machining process of large welding gear

A technology of welding gear and processing technology, which is applied in the field of gears, can solve the problems of unfavorable large-scale welding gears, short stable working time of welding gears, and short service life of gears, etc., and achieve lively overall performance, convenient operation, and improved hardness and toughness Effect

Inactive Publication Date: 2020-02-07
湖北富洋机械制造股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a processing technology for large-scale welded gears, which solves the problem that after welding of traditional large-scale gears, the service life of the gears is often short due to the welding defects of the gears, which is not conducive to large-scale welded gears. For long-term stable use, some advanced enterprises use contemporary advanced welding methods for welding, but because the welding requirements are not up to standard and the heat treatment of the gears is not timely during processing, it often leads to the problem that the stable working time of the welded gears is relatively short

Method used

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  • Machining process of large welding gear

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Preliminary machining of the gear blank: clamp the blank of the gear on a vertical turning machine, install an auxiliary stabilizing device on the other side of the main shaft, and then check the precision of the inner hole and end surface of the gear blank by machining equipment preliminary processing;

[0032] Step 2: Blank preparatory heat treatment: carbon steel and alloy steel with a carbon content of 0.5% are annealed, that is, the metal is slowly heated to a specified temperature, and the steel is heated to 30 degrees Celsius above the critical temperature, kept for 30 minutes, and then heated with the furnace cool down;

[0033] Step 3: Preliminary machining of gear tooth profile: Secondary machining of the inner hole and end face of the heat-treated gear;

[0034] Step 4: Turning of the gear tooth shape: Fix the above-mentioned gear blank with a CNC machine tool, and process the inner hole and end face of the gear blank through the CNC machine tool;

...

Embodiment 2

[0040] Step 1: Preliminary machining of the gear blank: clamp the blank of the gear on a vertical turning machine, install an auxiliary stabilizing device on the other side of the main shaft, and then check the precision of the inner hole and end surface of the gear blank by machining equipment preliminary processing;

[0041] Step 2: Blank preparatory heat treatment: carbon steel and alloy steel with a carbon content of 1% are annealed, that is, the metal is slowly heated to a specified temperature, and the steel is heated to 40 degrees Celsius above the critical temperature, kept for 40 minutes, and then heated with the furnace cool down;

[0042] Step 3: Preliminary machining of gear tooth profile: Secondary machining of the inner hole and end face of the heat-treated gear;

[0043]Step 4: Turning of the gear tooth shape: Fix the above-mentioned gear blank with a CNC machine tool, and process the inner hole and end face of the gear blank through the CNC machine tool;

[0...

Embodiment 3

[0049] Step 1: Preliminary machining of the gear blank: clamp the blank of the gear on a vertical turning machine, install an auxiliary stabilizing device on the other side of the main shaft, and then check the precision of the inner hole and end surface of the gear blank by machining equipment preliminary processing;

[0050] Step 2: Blank preparatory heat treatment: carbon steel and alloy steel with a carbon content of 1.5% are annealed, that is, the metal is slowly heated to a specified temperature, and the steel is heated to 50 degrees Celsius above the critical temperature, kept for 50 minutes, and then heated with the furnace cool down;

[0051] Step 3: Preliminary machining of gear tooth profile: Secondary machining of the inner hole and end face of the heat-treated gear;

[0052] Step 4: Turning of the gear tooth shape: Fix the above-mentioned gear blank with a CNC machine tool, and process the inner hole and end face of the gear blank through the CNC machine tool;

...

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Abstract

The invention discloses a machining process of a large welding gear. The machining process specifically comprises the following steps of 1, preliminary machining of a gear blank; 2, preliminary heat treatment of the blank; 3, preliminary machining of the gear shape; 4, turning machining of the gear shape; 5, welding of all parts of the gear; 6, gear shaving and hobbing finish machining of the gear; and 7, secondary heat treatment of the gear. The invention relates to the technical field of gears. According to the machining process of the large welding gear, through the arrangement of the step5, the welding part is preheated and subjected to heat preservation when the gear is welded, after preheating, the overall performance of the gear is more active than that of a normal temperature state, welding spots can be completely heated and fused during welding, the optimal welding state is achieved, carbon dioxide is adopted for welding protection during welding, the welding spots are effectively prevented from being oxidized by air, the reliability of the welding spots during welding is further improved, and the percent of pass of welded products is improved.

Description

technical field [0001] The invention relates to the technical field of gears, in particular to a processing technology for large-scale welded gears. Background technique [0002] A gear is a mechanical element with gears on the rim that continuously mesh to transmit motion and power. The application of gears in transmission has appeared very early. The principle of generative gear cutting method and special machine tools and cutting tools using this principle have appeared one after another. With the development of production, the stability of gear operation has been paid more attention. Gears can be classified according to tooth shape, gear shape, tooth line shape, surface where the teeth are located, and manufacturing methods. The tooth shape of the gear includes tooth profile curve, pressure angle, tooth height and displacement. Involute gears are relatively easy to manufacture, so among the gears used in modern times, involute gears account for the absolute majority, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/14
CPCB23P15/14
Inventor 董丽娟
Owner 湖北富洋机械制造股份有限公司
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