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Preparation method of a corrosion-resistant oil pump gear

An oil pump, corrosion-resistant technology, applied in the field of oil pumps, can solve problems such as not suitable for the use of oil pumps, and achieve the effects of low noise, strong bearing capacity, and stable transmission

Active Publication Date: 2016-01-27
FULAIYIN AUTOMOBILE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of the gear of the gear oil pump directly affects the performance of the oil pump. At present, the manufacturing process of this kind of gear is not suitable for the use requirements of the oil pump.

Method used

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  • Preparation method of a corrosion-resistant oil pump gear

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Embodiment Construction

[0021] Referring to the accompanying drawings, a method for preparing gears for corrosion-resistant oil pumps includes the following steps:

[0022] 1) Casting and molding gear blanks, the weight percentages of the chemical components of each component are: C: 2.85-3.25%, Si: 1.2-1.5%, Mn: 0.8-1.2%, P: 0.6-0.8%, S: 0.05-0.07% , Cr0.24-0.35%, Cu0.7-0.9%, the balance is iron, the temperature of the casted gear blank is reduced to 300°C, then heated to 650-760°C, kept for 3-5 hours, and furnace cooled to 300°C , keep warm for 4 hours, then heat to 650-760°C, keep hold for 17 hours, cool to 450°C at 50°C / hour, then cool to 140°C at 20°C / hour;

[0023] 2) Choose a CNC lathe, choose a carbide tool for the tool, and carry out the finishing turning of the large end a of the gear to 18.6±0.2mm, the small end b to 6.1±0.05mm, the outer diameter e to φ74.1±0.1mm and chamfering, Inner hole c to φ38.5±0.1mm;

[0024] 3) Choose a CNC lathe, choose a carbide tool for the tool, and perform ...

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Abstract

The invention discloses a preparation method of a gear for a corrosion-resistant oil transfer pump. The preparation method comprises the following operation steps: 1), forming a gear blank by casting, wherein the gear blank comprises the following chemical components in percentage by weight: 2.85-3.25% of C, 1.2-1.5% of Si, 0.8-1.2% of Mn, 0.6-0.8% of P, 0.05-0.07% of S, 0.24-0.35% of Cr and 0.7-0.9% of Cu; reducing the temperature of the gear blank formed by casting to 300 DEG C and then heating up the gear blank to 650-760 DEG C and keeping the temperature for 3-5 hours; and cooling the gear blank to 300 DEG C in a furnace and keeping the temperature for 4 hours, and then heating up the gear blank to 650-760 DEG C and keeping the heat for 17 hours, cooling the re-heated gear blank to 450 DEG C at a rate of 50 DEG C / hour and then cooling the cooled gear blank to 140 DEG C at a rate of 20 DEG C / hour. In an engagement process, the preparation method disclosed by the invention has no axial component force, a large overlap coefficient, good corrosion resistance, a low noise, high bearing capacity, stable transmission, high efficiency and high bending strength.

Description

technical field [0001] The invention relates to the field of oil pumps, in particular to a method for preparing gears for corrosion-resistant oil pumps. Background technique [0002] The role of the fuel delivery pump is to ensure that the diesel oil circulates in the low-pressure oil circuit, and to supply a sufficient amount of fuel with a certain pressure to the fuel injection pump. The fuel delivery volume should be 3-4 times the maximum fuel injection volume under full load. Oil pumps are divided into gear oil pumps, diaphragm oil pumps, plunger oil pumps, pipeline oil pumps and so on. The quality of the gears of the gear oil pump directly affects the performance of the oil pump. At present, the manufacturing process of this kind of gear is not suitable for the use requirements of the oil pump. Contents of the invention [0003] The object of the present invention is to provide a method for preparing gears for corrosion-resistant oil pumps, which has no axial compone...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14C22C38/60C22C37/06C23F17/00
Inventor 姜国松
Owner FULAIYIN AUTOMOBILE PARTS
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