Piston ring and surface spongy tin plating technique thereof

A technology of piston rings and loose holes, which is applied to piston rings, engine components, mechanical equipment, etc., can solve the problems of slow heat conduction and uneven oil distribution, and achieve the effect of improving service life, uniform oil distribution and improving oil adhesion.

Inactive Publication Date: 2010-09-22
XIANGFAN XINLI HENGXING PISTON RINGS
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improving the performance of the piston ring is the key to the working performance of the engine. Plating hard chrome on the working surface of the piston ring can improve the surface hardness and wear resistance, but the piston ring has the disadvantages of slow heat conduction in the cylinder liner and uneven oil distribution. It is an urgent technical problem to be solved
[0003] At present, the surface treatment of internal combustion engine piston rings at home

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Piston ring and surface spongy tin plating technique thereof
  • Piston ring and surface spongy tin plating technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0079] Example 1

[0080] Take a number of piston rings and encircle the piston with embracing bushes, and compress them with a mandrel to ensure that the two end faces of the piston ring are tightly fitted, and seal and polish the outer circular surface with sealing glue to ensure a good surface roughness , Before entering the electroplating tank, use a sandblasting machine for sandblasting. Then put it into 60℃ clean water to wash. Finally, put it into the chrome plating bath with the following formula for chrome plating:

[0081] Chromic Anhydride CrO 3 :200g / L; sulfuric acid H 2 SO 4 :2.2g / L; trivalent chromium (Cr 3+ ): 3.0g / L; acid ratio (CrO 3 / SO 4 2- ): 100 / 1.2; current density: 40A / dm 2 ; Bath temperature: 58℃; plating time: 2.4h.

[0082] Take out the piston ring from the chromium plating bath, wash it in 60℃ water, and put it into the equipment after cleaning: hydrogen removal in an oven at 200℃, the hydrogen removal time is 3h. Then return the piston ring to the machi...

Example Embodiment

[0094] Example 2

[0095] Take a number of piston rings and encircle the piston with embracing bushes, and press them with a mandrel to ensure that the two end faces of the piston ring are tightly fitted, and seal and polish the outer circular surface with sealing glue to ensure good surface roughness , Before entering the electroplating tank, use a sandblasting machine for sandblasting. Then put it into 65℃ clean water to wash. After drying, put it into the chrome plating bath of the following formula for chrome plating:

[0096] Chromic Anhydride CrO 3 :210g / L; sulfuric acid H 2 SO 4 :2.2g / L; trivalent chromium (Cr 3+ ): 3.2g / L; acid ratio (CrO 3 / SO 4 2- ): 100 / 1.2; current density: 42A / dm 2 ; Bath temperature: 58℃; plating time: 2.4h.

[0097] Take out the piston ring from the chromium plating bath, wash it in 65℃ water, and put it into the equipment after cleaning: remove hydrogen in an oven at 200℃, and the hydrogen removal time is 3.2h. Then return the piston ring to the ma...

Example Embodiment

[0109] Example 3

[0110] Take a number of piston rings and encircle the piston with embracing bushes, and press them with a mandrel to ensure that the two end faces of the piston ring are tightly fitted, and seal and polish the outer circular surface with sealing glue to ensure good surface roughness , Before entering the electroplating tank, use a sandblasting machine for sandblasting. Then put it into 65℃ clean water to wash. After drying, put it into the chrome plating bath of the following formula for chrome plating:

[0111] Chromic Anhydride CrO 3 :210g / L; sulfuric acid H 2 SO 4 :2.4g / L; trivalent chromium (Cr 3+ ): 3.4g / L; acid ratio (CrO 3 / SO 4 2- ): 100 / 1.2; current density: 45A / dm 2 ; Bath temperature: 60℃; plating time: 2.6h.

[0112] Take out the piston ring from the chromium plating bath, wash it in 70°C water, and put it into the equipment after cleaning: hydrogen removal in an oven at 200°C, and the hydrogen removal time is 3.4h. Then the piston ring is returned t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a piston ring and a surface spongy tin plating technique thereof. The technical scheme thereof is as follows: the surface of a piston ring body is provided with a chromium plating layer, the outer surface of the chromium plating layer is provided with a spongy reticulate pattern, and the outer surface of the spongy reticulate pattern is provided with a tin plating layer. The invention comprises the following procedures: preplating, etching, chromium plating, washing, removal of hydrogen, hole loosing, washing and drying and tin plating treatment. The invention utilizes a reticulate pattern groove on the surface of the piston ring to store lubricating oil, thus greatly reducing the friction coefficient between the piston ring and a cylinder sleeve, improving oil absorbing property, and prolonging the service life of the piston ring and the cylinder sleeve; and compared with the prior art, the invention prolongs the service life of the piston ring and the cylinder sleeve by more than three thousand hours, improves the power of an internal combustion engine by more than 30 percent, saves oil by 25 percent, is capable of reducing the exhaust amount of gas/smoke of the internal combustion engine, reduces the environment requirements of atmosphere pollution, solves the mechanical wear of the piston ring during running-in period and obtains more perfect use performances.

Description

technical field [0001] The invention relates to a piston ring of an internal combustion engine. The invention also relates to the process of tinning the loose holes on two different metal surfaces of the piston ring surface Background technique [0002] The piston ring is one of the key parts of the internal combustion engine. The quality of the piston ring's working characteristics directly affects the performance of the engine. Its main functions are sealing, heat conduction, evenly distributing lubricating oil and supporting the piston. The piston ring reciprocates with the piston in the cylinder. It is one of the parts with the worst working conditions in the engine and has the shortest service life. They are characterized by high operating temperatures and high-speed sliding under high mechanical loads, subject to intense wear. Improving the performance of the piston ring is the key to the working performance of the engine. Plating hard chrome on the working surface o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): F16J9/00C25D5/12C25D3/30C25D3/06C25F3/02
Inventor 王志伦叶德明李垂辉纪冬青
Owner XIANGFAN XINLI HENGXING PISTON RINGS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap