Foreword

At present, domestic tools for processing cast iron are mainly cemented carbide tools, corundum (or Silicon Carbide) abrasives, etc. These tools generally have shortcomings such as low processing efficiency, poor processing quality, and low tool safety. Especially when the material is made of wear-resistant cast iron and the white layer and the sand layer of the cast iron piece, such tools show obvious incompatibility. Drawing on the design ideas of the Japanese Ligan Company's diamond saw blades for cast iron cutting, we have developed a series of products such as diamond grinding discs and diamond drill bits while producing the same kind of products, so that the diamond tools can satisfy the slotting and cutting of cast iron. Requirements for several different operations such as grinding and drilling. Compared with traditional tools, diamond tools have doubled the indicators of processing quality, service life and processing efficiency, showing high efficiency, low consumption and safety.

Technical solutions and principles

The tool is made by electroplating (electroforming) and is an electroplated metal bond diamond tool.

For the characteristics and use requirements of cast iron materials and diamond tools, the key issues in the following aspects are addressed in the design and manufacture of tools:

1. Bond strength between metal plating and substrate

The cutting and grinding of cast iron parts is often carried out in a non-cooling water environment, that is, dry cutting and dry grinding. For electroplating products, no cooling operation increases the temperature of the tool itself, and it is easy to make the plating layer and the substrate. Cracking, causing the coating to fall off. To solve this problem, the following designs are used:

(1) The material of the substrate is selected from low expansion coefficient alloy steel, and the metal salt close to the base material is selected as the main salt of the plating solution to reduce the difference in thermal expansion coefficient between different materials between the substrate and the plating layer;

(2) pre-plating the Cu layer on the surface of the substrate as a transition layer, increasing the bonding strength between the substrate and the plating layer;

(3) The substrate is electrically activated;

(4) The upper sand plating and thickening plating processes adopt different plating liquid formulations to improve the internal stress state of the plating layer and reduce the abnormal peeling factor of the plating layer.

2, the processing efficiency of the workpiece

Since the diamond tool realizes the processing of cast iron by the diamond micro-cutting edge which is densely coated on the surface, it is easy to cause the cutting edge to be blocked or blunt by the chip to affect the efficiency. To solve this problem, the following design is adopted:

(1) Selecting a high-grade coarse-grained diamond single crystal as the cutting edge;

(2) Control the thickness of the diamond particles embedded in the coating by controlling the thickening time to ensure that the average blade height is 0.1 mm or more;

(3) Optimize the electroplating process, using plating liquid circulation, filtration, profiling anode and other means to improve the distribution of power lines in the electric field, make the plating layer smooth, and reduce the appearance of metal tumors.

3, security issues

The use of high-quality steel plate, design a reasonable structure, eliminate stress concentration, thus avoiding the use of matrix cracking.

Next page

Product introduction

Granular Activated Carbon with high quality anthracite as raw material. Granular Activated Carbon has high strength, high porosity, large surface area, especially large micro-pore volume, strong adsorption capacity, durable and other unique advantages.

Application

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Coal-based Granular Activated Carbon

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