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A preparation method of brazing superabrasive tool based on protective coating

A super-hard abrasive and protective coating technology, applied in abrasives, manufacturing tools, metal processing equipment, etc., can solve the problems of high shielding gas cost, increase brazing cost, increase welding cost, etc., to improve heating rate and production efficiency , the effect of improving product competitiveness and reducing equipment costs

Inactive Publication Date: 2018-09-25
江苏索力德机电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Taking diamond as an example, it can be graphitized in the air at 750 degrees. If there is no protective environment, it is easy to make the superhard abrasive lose its original performance.
[0008] 2. Protecting the environment can also protect the alloy solder powder from the influence of air components. For example, copper-based alloy solder is affected by oxygen and nitrogen in the air. Therefore, it is necessary to use a vacuum or argon protective atmosphere during brazing. This protection Although the measures effectively ensure the brazing performance, they also greatly increase the cost of brazing. Due to the use of vacuum environment, the cost of the added vacuum equipment is more than twice that of non-vacuum equipment. The protective atmosphere needs to exist throughout the brazing process. Greatly increased welding costs
[0010] Due to the high price of high vacuum equipment and the high cost of shielding gas, the cost of superabrasive brazing tools remains high. Superabrasive tools have not completely replaced electroplating tools and resin tools in the field of advantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] A method for preparing a brazed super-hard abrasive tool based on a protective coating includes the following steps.

[0033] Step 1. Cleaning the surface of the tool base: Derust and degrease the surface of the tool base.

[0034] Step 2. Distributing: After cleaning, the super abrasive and alloy solder are arranged on the surface of the tool base that needs to be brazed. The surface of the tool base with super abrasive and alloy solder is called the cloth area.

[0035] The aforementioned alloy solder is preferably a nickel-based alloy, a silver-based alloy, or a copper-based alloy, etc., and the alloy solder contains titanium or chromium, so it can not undergo chemical metallurgical reaction with the superabrasive at a certain temperature.

[0036] Step 3. Add a protective coating: Add a protective coating on the top of the cloth area in step 2; the protective coating is formed by uniformly adhering protective particles on the cloth area by an adhesive.

[0037] The binder is ...

Embodiment 1

[0054] A nickel-based brazed diamond grinding disc used to polish the surface burrs of castings, with a specification of 125mm.

[0055] Preparation parameters: super-hard abrasive grains are diamonds with a particle size of 35 mesh; alloy solder is nickel-based alloy solder, its main components are: nickel-chromium-borosilicate, and the particle size of alloy solder is 40 mesh. When brazing, the super-hard abrasive grains are required to be exposed to high, no alloy solder is coated, and the super-hard abrasive is less damaged after welding.

[0056] The specific preparation method is as follows:

[0057] Step 1. De-oil, sand-blast and rust-removing diamond grinding discs.

[0058] Step 2: After the cleaning is completed, apply a layer of adhesive on the area to be welded, the adhesive is made up of adhesive and diluent in a volume ratio of 1:2. Next, spray diamond and nickel-based alloy solder on the area to be soldered with adhesive to form a cloth area.

[0059] Step 3, first mix ...

Embodiment 2

[0063] The preparation of a brazed diamond hole drill for drilling high-hard ceramics requires sharp drilling and high efficiency. That is, the super-hard abrasive is diamond, and its particle size is 50 mesh. The size of the diamond hole drill is 10mm.

[0064] Due to the small outer diameter of the drill bit, high dimensional accuracy requirements, and sharp drilling requirements, the diamond should be exposed as much as possible. The specific production method includes the following steps:

[0065] Step 1. The diamond drill bit is sandblasted to remove rust as a whole.

[0066] Step 2, cloth.

[0067] Mix the binder and diluent at a ratio of 1:4, and mix with 300 mesh nickel-based alloy powder to form a paste.

[0068] Apply the paste-like nickel-based alloy to the top and inner and outer sides of the diamond bit to ensure even application. Then sprinkle a 50-mesh diamond cloth on the surface of the paste nickel-based alloy, and ensure that the spread is even.

[0069] Step 3. Add...

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Abstract

The invention discloses a brazing superhard grinding material tool manufacturing method based on a protective coating. The manufacturing method mainly comprises the steps that the surface of a tool base is cleaned; material distribution is carried out; the protective coating is added, wherein the protective coating comprises uniform protective particles with the grain diameters ranging from 120 meshes to 2000 meshes; then the tool base with the protective coating is fed to a heating cavity to be subject to brazing heating; and finally the protective coating on the surface is removed, and then a superhard grinding material brazing tool is obtained. After the above method is used, as the protective particles are fine, after binder and diluent ingredients volatilize, a compact protective shell layer can still be formed, and ingredients such as oxygen and nitrogen in air can be prevented from reacting with a superhard grinding material or an alloy solder ingredient. In addition, the high-temperature heating cavity has the expanding trend, and therefore air compositions cannot enter the heating cavity easily, a protective atmosphere or vacuum environment is avoided during superhard grinding material tool brazing, the equipment cost is effectively reduced, the heating rate and the production efficiency are improved, and the product competitiveness is improved.

Description

Technical field [0001] The invention relates to the field of preparation of super-hard abrasive tools, in particular to a preparation method of brazed super-hard abrasive tools based on protective coatings. Background technique [0002] Super-hard abrasives refer to abrasives with extremely high hardness represented by synthetic diamond and cubic boron nitride. They are mainly used in the processing of metal or non-metal materials, including cutting, drilling and grinding. [0003] Brazing refers to a process in which a certain composition of solder is used to fill between the parent materials and heat in a certain way to melt the solder, thereby firmly connecting the parent materials together. The brazing super-hard abrasive is melted by alloy solder, and chemical metallurgical interaction can occur between the super-hard abrasive and the substrate, thereby firmly connecting the two together. [0004] Commonly used alloy solders include three solder systems: nickel-based alloy sold...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/00B24D18/00B24C1/08
CPCB24C1/086B24D3/004B24D18/0054B24D18/0072B24D18/009
Inventor 王波周俊李海源
Owner 江苏索力德机电科技股份有限公司