Machining method for plunger of hydraulic plunger pump

A technology of a hydraulic plunger pump and a processing method, which is applied in the field of plunger processing, can solve problems such as short life, non-wear resistance, and sticking, and achieve the effects of prolonged service life, less contact surface, and no sticking

Active Publication Date: 2021-05-25
WUXI YINGBEI PRECISION BEARING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual plunger material is mainly 20CrMo alloy steel, which is often not wear-resistant, has a short life, and sometimes jams.

Method used

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  • Machining method for plunger of hydraulic plunger pump
  • Machining method for plunger of hydraulic plunger pump
  • Machining method for plunger of hydraulic plunger pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The processing method of the plunger of embodiment 1 hydraulic plunger pump

[0047] Raw material: 31CrMoV9 material is prepared from the following raw materials by weight percentage: C 0.27%, Si 0.2%, Mn0.4%, P 0.02%, S 0.02%, Cr 2.3%, Mo 0.15%, V 0.1%, the balance is iron.

[0048] S1. Car processing;

[0049] S2. Nitriding heat treatment, the instrument used is a heat treatment nitriding furnace;

[0050] include:

[0051] S201. Incoming material inspection, confirming that the model and quantity of the parts are consistent with the delivery note or circulation card, and there is no appearance defect;

[0052] S202. Cleaning, soak the parts in water-based cleaning agent for 2 minutes, and shake up and down, then soak in hydrocarbon cleaning agent for 2-3 minutes, and shake up and down, do not bump the parts, and finally dry them with compressed air;

[0053] The water-based cleaning agent is made by mixing the following raw materials in parts by weight: 10 parts ...

Embodiment 2

[0063] The processing method of the plunger of embodiment 2 hydraulic plunger pump

[0064] Raw material: 31CrMoV9 material is prepared from the following raw materials by weight percentage: C 0.34%, Si 0.1%, Mn0.7%, P 0.022%, S 0.035%, Cr 2.7%, Mo 0.25%, V 0.2%, the balance is iron.

[0065] S1. Car processing;

[0066] S2. Nitriding heat treatment, the instrument used is a heat treatment nitriding furnace;

[0067] include:

[0068] S201. Incoming material inspection, confirming that the model and quantity of the parts are consistent with the delivery note or circulation card, and there is no appearance defect;

[0069] S202. Cleaning, soak the parts in water-based cleaning agent for 2-3 minutes, and shake up and down, then soak in hydrocarbon cleaning agent for 2-3 minutes, and shake up and down, do not bump the parts, and finally dry them with compressed air;

[0070] The water-based cleaning agent is made by mixing the following raw materials by weight: 20 parts of so...

Embodiment 3

[0080] The processing method of the plunger of embodiment 3 hydraulic plunger pump

[0081] Raw material: 31CrMoV9 material is prepared from the following raw materials by weight percentage: C 0.3%, Si 0.3%, Mn0.6%, P 0.024%, S 0.03%, Cr 2.5%, Mo 0.2%, V 0.15%, the balance is iron.

[0082] S1. Car processing;

[0083] S2. Nitriding heat treatment, the instrument used is a heat treatment nitriding furnace;

[0084] include:

[0085] S201. Incoming material inspection, confirming that the model and quantity of the parts are consistent with the delivery note or circulation card, and there is no appearance defect;

[0086] S202. Cleaning, soak the parts in water-based cleaning agent for 2.5 minutes, and shake up and down, then soak in hydrocarbon cleaning agent for 2.5 minutes, and shake up and down, do not bump the parts, and finally dry them with compressed air;

[0087] The water-based cleaning agent is made by mixing the following raw materials in parts by weight: 15 part...

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Abstract

The invention discloses a machining method for a plunger of a hydraulic plunger pump. The machining method is used for machining a 31CrMoV9 material and includes the following steps of: S1, turning; S2, nitriding heat treatment, including the following steps of: S201, inspection; S202, cleaning; S203, clamping; S204, pre-oxidation; S205, exhausting; S206, nitrocarburizing; S207, cooling; S208, discharging; and S3, crushing grinding. According to the machining method disclosed by the invention, a 31CrMoV9 material is nitrided to replace the original carburization and quenching treatment of a 20CrMo material; grinding after heating is carried out by a crushing grinding machine instead of the original through-type penetrating grinding machine, so that the surface hardness of a product is high and the product is more wear-resistant; the surface of the outer circle protrudes slightly; the positions, the 4-8 mm positions of the two ends are subjected to edge collapse; a contact surface is smaller and smoother during working; operation is more stable; chucking is avoided; and the machined products are enabled to meet the technical requirements of drawings.

Description

technical field [0001] The invention relates to the technical field of hydraulic control components, in particular to a processing method for a plunger of a hydraulic plunger pump. Background technique [0002] The plunger pump is an important device of the hydraulic system. It relies on the reciprocating movement of the plunger in the cylinder to cause the change of the sealing volume to realize oil suction and pressure. Piston pumps are widely used in oil and natural gas well site transportation systems due to their advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment. The plunger mainly works with the copper sliding shoe in the hydraulic plunger pump. Hydraulic plunger pumps are widely used in control engineering such as hydraulic system control and hydraulic system execution. The main types of installed capacity are automobile engineering, aviation engineering, construction machinery and other industries. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王伟蔡中辉
Owner WUXI YINGBEI PRECISION BEARING
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