Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Device and method for hard chrome plating of inner wall of straight cylinder part

A technology of hard chrome plating and parts, which is applied in the field of hard chrome plating on the inner wall of straight parts and hard chrome plating on the inner wall of straight parts. It can solve the problems of slow bath circulation, uneven crystallization of the surface of the chrome plating layer, and excessive local temperature rise. To achieve the effect of speeding up the circulation of the bath solution, solving the unevenness of the coating, and improving the quality of the product

Inactive Publication Date: 2015-02-25
HEFEI JIANGHANG AIRCRAFT EQUIP CORP LTD
View PDF7 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Solve the problem of uneven crystallization of the surface of the chrome plating layer caused by the device for hard chrome plating on the inne

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
  • Device and method for hard chrome plating of inner wall of straight cylinder part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] 1. Before electroplating, use gasoline to clean the inner and outer surfaces of the electroplated workpiece 1. After degreasing, wash with hot water. After rinsing with tap water, the surface has no water film before putting it into the bath that has been heated and meets the technical requirements to preheat for 1 to 2 minutes. .

[0022] 2. Connect the prepared acid-resistant pump before lowering the tank to circulate the bath liquid. Since the chrome-plating bath liquid is very toxic and will cause great harm to the human body, the power of the acid-resistant pump should not be too large, otherwise it will cause injury due to the too far lift of the bath liquid. And the operator should be selected according to the size of the inner diameter of the straight cylinder. The power of the acid-resistant pump adopted in the present invention is 55kw, the rotating speed is 2900r / h, the lift is 11m, and the suction lift is 3m. The water outlet of the pump is connected to the...

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 belongs to electrodeposited chromium processing technology of the inner wall of straight cylinder workpiece, and relates to a device and method for hard chrome plating of the inner wall of a straight cylinder part. The device comprises the following parts: an anode cable 3, which is connected with the anode rod 7 for electroplating; a polyvinyl chloride protective film 2, which coats the anode rod placed on the non-chrome plating part of the inner wall; a cathode cable, which is connected to the whole straight cylinder part 1; an inner wall of the straight cylinder 6; an upper anode fixed protection device (organic glass) 4; a lower anode fixed protection device (organic glass) 8; and a screw holes 9, which is connected with an outlet of an acid resistant pump. The device meets the environmental requirements of the inner wall of the straight cylinder in a circular liquid groove, realizes the routine operation process of the electrodeposited chromium of the inner wall of the straight cylinder. The invention relates to a chromium plating method for solving the problem of uneven crystallization of chrome plating layer of the inner wall of the straight cylinder part and for protecting the device. The invention can solve the problem of nonuniform crystallization of chrome plating layer surface caused by fast local heating due to slow cycling of groove liquid in the chrome plating process, and provides a device for protecting the parts without chrome plating.

Description

technical field [0001] The invention belongs to the electroplating and chrome plating processing technology, and relates to a device for hard chrome plating on the inner wall of straight cylindrical parts and a method for hard chrome plating on the inner wall of straight cylindrical parts. Background technique [0002] Chromium is a kind of silver-white metal with microstrip blue, relative atomic mass 51.99, density 6.98~7.21g / cm2, metal chromium is easily passivated in the air, and a very thin passivation film is formed on the surface, it is a kind of Precious metal material with high corrosion resistance. The chromium plating layer has high hardness and good heat resistance. When heated below 500°C, its gloss and hardness will not change significantly. When the temperature is higher than 500°C, it will start to oxidize and change color, and the hardness will begin to decrease when the temperature is higher than 700°C. The friction coefficient of the chromium plating layer...

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): C25D7/04C25D17/00
Inventor 俞志文江涌
Owner HEFEI JIANGHANG AIRCRAFT EQUIP CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com