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

Low-nitric acid chemical deburring liquid for burr removal of iron pillar shaped helical spring

A technology of coil spring and deburring liquid, applied in the field of low nitric acid chemical deburring liquid, can solve the problems that the diversity of parts material composition cannot be adapted, the processing results cannot meet the quality requirements, the working temperature cannot be too high, etc., and the burr removal rate can be achieved. The effect of high, saving resources and reducing production costs

Inactive Publication Date: 2008-12-10
JIANGSU UNIV +1
View PDF0 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrogen peroxide is easily decomposed by heat, so the working temperature should not be too high, the working time is long, and the working efficiency is low. At the same time, some hydrogen peroxide stabilizers need to be added to inhibit its decomposition, so that the formula cost is relatively high
[0013] It should be pointed out that the existing chemical deburring solutions have a common defect, that is, they can only be applied to a single material, and cannot adapt to the diversity of component materials, or the processing results cannot meet the quality requirements
Therefore, the chemical deburring method of cylindrical helical springs with complex shapes made of iron-based materials for different carbon contents and different metal elements has not been reported yet.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the workpiece material of the columnar coil spring is No. 70 steel, the size is Φ2.4×248mm, and the quantity is 100. The workpiece is subjected to normal pretreatment (oil removal, rust removal, etc.). It is required that the surface is smooth and not sticky, the surface roughness is Ra0.8, and the surface burr height is less than 0.002mm.

[0037] Carry out chemical deburring treatment to the above spring according to the following procedures:

[0038] a) The prepared deburring solution contains per liter of solution: 200ml / L of analytically pure hydrochloric acid, 20ml / L of analytically pure nitric acid, 15mg / L of 2-hydroxybenzoic acid, 0.5g / L of gelatin, 1g / L of polyethylene glycol, Nonylphenol polyoxyethylene ether, 2g / L, and the balance is water to prepare a 10L deburring solution, put it into a deburring container, and heat the container so that the temperature of the deburring solution is 60°C

[0039] b) Deburring The above 100 spring workpi...

Embodiment 2

[0048]In this embodiment, the spring workpiece material is 50CrVA, the workpiece size is Φ2.6×301 mm, and the number is 100. The samples are subjected to normal pretreatment (oil removal, rust removal, etc.). It is required that the surface is smooth and not sticky, the surface roughness is Ra0.8~Ra0.4, and the surface burr height is less than 0.002mm.

[0049] Carry out chemical deburring treatment on the above-mentioned spring workpiece according to the following procedure:

[0050] a) The prepared deburring solution contains per liter of solution: chemically pure hydrochloric acid 210ml / L, chemically pure nitric acid 28ml / L, 2-hydroxybenzoic acid 16mg / L, gelatin 0.7g / L, polyethylene glycol 1.5g / L , nonylphenol polyoxyethylene ether, 2.5g / L, and the remainder is water to prepare a deburring solution with a volume of 10L, and put it into a deburring container, and heat the container so that the temperature of the deburring solution is 65°C

[0051] b) Deburring The above 100...

Embodiment 3

[0060] In this embodiment, the material of the spring workpiece is stainless steel (equivalent to 1Cr18Ni9), the sample size is Φ2.2×3357mm, and the number is 100. The samples are subjected to normal pretreatment (oil removal, rust removal, etc.). It is required that the surface is smooth and not sticky, the surface roughness is Ra0.8~Ra0.4, and the surface burr height is less than 0.002mm.

[0061] Carry out chemical deburring treatment on the above-mentioned spring workpiece according to the following procedure:

[0062] a) Preparation of deburring solution contains per liter of solution: chemically pure hydrochloric acid 220ml / L, chemically pure nitric acid 30ml / L, 2-hydroxybenzoic acid 20mg / L, gelatin 1.0g / L, polyethylene glycol 2.0g / L , nonylphenol polyoxyethylene ether 3.0g / L, and the rest is water to prepare a 10L deburring solution, put it into a deburring container, and heat the container so that the temperature of the deburring solution is 70°C

[0063] b) Deburring...

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

PropertyMeasurementUnit
Heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to a hyponitric chemical deburring liquid and a deburring method for an iron-based cylindrical coil spring. The deburring liquid is prepared by the following compositions according to per liter liquid 200 to 220 milliliters of hydrochloric acid, 20 to 30 milliliters of nitric acid, 15 to 20 micrograms of 2-hydroxybenzoic acid, 0.5 to 1.0 gram of gelatine, 1 to 2 grams of polyethyleneglycol, 2 to 3 grams of nonyl phenol polyethenoxy ether, the balance being water. The chemical deburring method comprises the following steps of: a). preparation of deburring liquid; b). deburring; c). cold-water washing; d). neutralizing treatment; e). cold-water washing; f). hot-water washing; g). drying; and h). immersion of rust-preventative oil. The deburring liquid has the advantages that: the content of the nitric acid in the deburring liquid is very low, thereby nitrogen oxide generated is very limited, consequently the deburring liquid has low pollution and is environment-friendly. Simultaneously, the deburring production process has simple operation, short working procedure time, and high burr removal rate, and is suitable for mass production of the cylindrical coil springs which have complex shapes and are difficult to perform mechanical deburring; and the surface finish quality of parts after deburring is high. Moreover, the raw materials of the deburring liquid are low in price and the energy consumption of the deburring treatment is low, thereby the method is favorable for saving the resources and reducing the production cost.

Description

technical field [0001] The invention relates to heat treatment of metal materials, in particular to a low nitric acid chemical deburring liquid for deburring iron-based columnar coil springs and a method thereof. Background technique [0002] Burrs are common on machined workpieces. [0003] The processing methods of mechanical parts can be roughly divided into material removal processing, deformation processing, additional processing and so on. In various processing, the excess part derived from the processed part that does not conform to the required shape and size is the burr. The generation of burrs varies with different processing methods. Iron-based cylindrical coil spring burrs are mainly produced in cutting and forming. [0004] Due to the existence of burrs, the entire mechanical system cannot work normally, reducing reliability and stability. When a machine with burrs moves or vibrates mechanically, the shedding burrs will cause premature wear on the sliding su...

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): C23G1/08
Inventor 卢章平纪嘉明吴晶陶维明吴启强
Owner JIANGSU UNIV
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