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Method for machining bushing rings of ball mills

A processing method and ball mill technology, applied in the field of mechanical processing, can solve the problems of low qualified rate and achieve the effects of uniform density, improved uniformity, and process uniformity control

Active Publication Date: 2015-05-06
GUANGXI WUZHOU GANGDE HARD ALLOY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a processing method for the lining ring of a ball mill, which can solve the problems of uniformity control and low pass rate of the existing processing method in cloth distribution

Method used

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  • Method for machining bushing rings of ball mills

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] To process a backing ring with inner and outer diameters of 510 mm and 530 mm and a thickness of 50 mm, the steps are as follows:

[0024] Sprinkle 12.09 kg of mixed powder, including 0.94 kg of 1-1.5 μm cobalt powder and 11.15 kg of 1-2 μm tungsten carbide powder, and continuously sprinkle the powder mixture on the horizontally rotating die with a uniform discharge hopper In the die, the rotation speed of the die is 5 revolutions per minute, rotated 6 times, and the powder mixture in the die is evenly scraped by the scraper, so that the density of the powder mixture is relatively uniform; then proceed: use a punch to place the The powder mixture in the concave mold is pressed into a billet; then sintering: put the billet into a vacuum sintering furnace for sintering, the vacuum degree in the vacuum sintering furnace is controlled at 5-200Pa, within 20 hours , 800°C, heat preservation for 1-1.5 hours, continue to heat up for 12-15 hours, sintering temperature 1390°C-142...

Embodiment 2

[0027] To process a backing ring with inner and outer diameters of 510 mm and 530 mm and a thickness of 50 mm, the steps are as follows:

[0028] Sprinkle 11.97 kg of powder mixture, including 1.32 kg of 1-1.5 μm cobalt powder and 10.65 kg of 2-4 μm tungsten carbide powder, and continuously sprinkle the powder mixture on the horizontally rotating concave In the mold, the rotation speed of the concave mold is 6 revolutions per minute, and the rotation speed is 6 times. The powder mixture in the concave mold is evenly scraped by the scraper, so that the density of the powder mixture is relatively uniform; The powder mixture in the concave mold is pressed into a billet; then sintering: put the billet into a vacuum sintering furnace for sintering, the vacuum degree in the vacuum sintering furnace is controlled at 5-200Pa, at 20 Hours, 800°C, keep warm for 1-1.5 hours, continue to heat up for 12-15 hours, sintering temperature 1390°C-1420°C, 40-60 minutes, close the heating system ...

Embodiment 3

[0030] To process a backing ring with inner and outer diameters of 510 mm and 530 mm and a thickness of 50 mm, the steps are as follows:

[0031] Sprinkle 11.8 kg of powder mixture, including 1.77 kg of 1-1.5 μm cobalt powder and 10.03 kg of 2-4 μm tungsten carbide powder, and continuously sprinkle the powder mixture on the horizontally rotating concave In the mold, the concave mold rotates at a speed of 7 revolutions per minute and rotates 5 times. The powder mixture in the concave mold is evenly scraped by a scraper to make the density of the powder mixture relatively uniform; The powder mixture in the concave mold is pressed into a billet; then sintering: put the billet into a vacuum sintering furnace for sintering, the vacuum degree in the vacuum sintering furnace is controlled at 5-200Pa, at 20 Hours, 800°C, keep warm for 1-1.5 hours, continue to heat up for 12-15 hours, sintering temperature 1390°C-1420°C, 40-60 minutes, close the heating system of the sintering furnace,...

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Abstract

The invention discloses a method for machining bushing rings of ball mills. The method includes steps of A, distributing; B, pressing; and C, sintering. In the step of distributing, powder mixtures are poured in a horizontally rotating female die by a discharge hopper capable of discharging powder uniformly, a scraper scraps the female die distributed with the powder mixtures at a constant speed, the rotational speed of the female die ranges from 5 revolutions per minute to 8 revolutions per minute, the female die rotates repeatedly, and the powder is scraped by the scraper to be balanced, so that the density of the powder is uniform relatively. In the step of pressing, the powder mixtures placed in the female die are pressed into a blank by a punching machine. The method for machining the busing rings of the ball mills can solve problems that uniformity cannot be controlled when materials are distributed in an existing method for machining bushing rings of ball mills, and qualified rate is low.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a method for pressing a lining ring of an inner bucket wall of a cemented carbide powder ball mill. Background technique [0002] The inner barrel wall of the ball mill made of cemented carbide powder rolls and rubs with the alloy ball and powder during the working process, and the higher the strength and hardness are required, the better. The existing inner barrel of the ball mill is made of stainless steel, which has low hardness and poor wear resistance, and the thinning of the shed stainless steel is likely to cause doping of the cemented carbide powder material. Multiple cemented carbide lining rings are used to form the inner barrel of the ball mill, which can have the advantages of wear resistance and no doping. Due to the large diameter and thin wall of this kind of ring, the method of mold pressing is generally used to process this kind of lining ring, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F5/00C22C29/08C22C1/04B02C17/22
Inventor 陈德勇吴立雄叶剑锋欧锦超谢汉雄甘兴邦何瑞明邓智勇李接林陈烽潘金凤石展飞韦国华
Owner GUANGXI WUZHOU GANGDE HARD ALLOY MFG
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