A crankshaft riser method that is easy to fall off and requires no grinding

A non-grinding, crankshaft technology, applied in the direction of casting molding equipment, metal processing equipment, casting mold components, etc., can solve the problems of easily damaged crankshaft castings, time-consuming, etc., to achieve automatic shedding, easy to avoid grinding, and improve production efficiency Effect

Active Publication Date: 2020-11-10
SHANXI HUAXIANG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of foundry industry, the riser and the crankshaft of compressor crankshaft castings are closely connected due to the process. In the post-processing stage, it is necessary to manually smash the riser, so that the riser is separated from the crankshaft. After separation, the crankshaft still has The residual riser needs to be manually polished to make the residual height of the riser less than 0.76mm, which takes a lot of time and is easy to damage the crankshaft casting

Method used

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  • A crankshaft riser method that is easy to fall off and requires no grinding
  • A crankshaft riser method that is easy to fall off and requires no grinding
  • A crankshaft riser method that is easy to fall off and requires no grinding

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Effect test

Embodiment 1

[0038] ①The weight of the crankshaft casting A is 0.21kg. After calculating through the pouring system formula, the required interception area is 35mm 2 ;

[0039] ②The shape of the riser neck is isosceles trapezoid, the lower bottom is 6mm, the upper bottom is 4mm, and the height is 7mm;

[0040] ③ The angle between the riser neck and the casting is designed to be 100°.

[0041] Tracking during production, after the crankshaft casting A passed through the drum and shot blasting, the riser was completely separated from the casting, and 10 pieces were taken to measure the residual height of the riser. The results are as follows:

[0042] 0.51mm, 0.34mm, 0.52mm, 0.70mm, 0.28mm, 0.34mm, 0.48mm, 0.66mm, 0.53mm, 0.47mm, the residual height is less than 0.76mm, no need for manual grinding.

Embodiment 2

[0044] X crankshaft:

[0045] ①The weight of the crankshaft casting X is 0.45kg. After calculation by the pouring system formula, the required area is about 70mm 2 ;

[0046] ②The shape of the riser neck is isosceles trapezoid, the lower bottom is 8mm, the upper bottom is 6mm, and the height is 10mm;

[0047] ③ The angle between the riser neck and the casting is designed to be about 120°.

[0048] Tracking during production, after the crankshaft casting X passed through the drum and shot blasting, the riser was completely separated from the casting, and 10 pieces were taken to measure the residual height of the riser. The results are as follows:

[0049] 0.37mm, 0.16mm, 0.61mm, 0.58mm, 0.32mm, 0.26mm, 0.45mm, 0.26mm, 0.33mm, 0.33mm, the residual height is less than 0.76mm, no need for manual grinding.

Embodiment 3

[0051] BE crankshaft: Relevant parts of riser neck in process design:

[0052] ①The weight of the crankshaft casting BE is 0.46kg. After calculation by the pouring system formula, the required area is about 71mm 2 ;

[0053] ②The shape of the riser neck is isosceles trapezoid, the lower bottom is 8mm, the upper bottom is 6mm, and the height is 10mm;

[0054] ③ The angle between the riser neck and the casting is designed to be about 107°.

[0055] Tracking during production, after the crankshaft casting BE passed through the drum and shot blasting, the riser was completely separated from the casting, and 10 pieces were taken to measure the residual height of the riser. The results are as follows:

[0056] 0.41mm, 0.45mm, 0.59mm, 0.46mm, 0.13mm, 0.56mm, 0.68mm, 0.59mm, 0.57mm, 0.35mm, the residual height is less than 0.76mm, no need for manual grinding.

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Abstract

The invention relates to a manufacturing method of a crankshaft riser with effects of easy falling and no grinding. A crankshaft casting is manufactured by the following steps of (1) the flow cutoff area required by the crankshaft casting is calculated; (2) a riser neck is in an isosceles trapezoid shape, the height / height ratio is controlled within 1, and the area of the riser neck is equal to 3.5 times of the flow cutoff area; (3) an angle between the riser neck and the casting is 90 to 130 degrees. The manufacturing method has the advantage that by changing the riser neck, the riser of thecrankshaft casting can automatically fall and be free from grinding, so that the labor intensity is decreased, and the damage to the casting body is avoided.

Description

technical field [0001] The invention relates to the field of casting, in particular to a method for making a crankshaft riser that is easy to fall off and does not require grinding. Background technique [0002] At present, in the field of foundry industry, the riser and crankshaft of compressor crankshaft castings are closely connected due to the process. In the post-processing stage, it is necessary to manually smash the riser to separate the riser from the crankshaft. After separation, there are still cracks on the crankshaft. The residual riser needs to be manually polished so that the height of the residual riser is less than 0.76mm, which consumes a lot of time and is easy to damage the crankshaft casting. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a crankshaft riser method which is easy to fall off and free from grinding. [0004] The technical means adopted in the present invention are: a method for making ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/08B22C9/22
CPCB22C9/088B22C9/22
Inventor 张园王渊张杰孙红民郑超斌赵冠阳
Owner SHANXI HUAXIANG GRP CO LTD
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