As more and more advanced industrial automation control equipment and the computer go into the cemented carbide manufacturing enterprises, the production of cemented carbide control technology is more and more stable, controllable and reliable mechanical properties. The result is produced by the blade becomes more and more consistent, the processing result of predictable and not because of different blade batch processing different results; new technology also makes the size tolerance of sintering blade band is narrower, higher precision,the performance for carbide insert has been greatly improved.

However, after the ordinary blade wheel or diamond wheel grinding after the micro gap existed in different degree, in the cutting process of micro gap expand easily, quicken blade wear and damage. The coated carbide blade must be passivated in front of the coating to ensure the coating durability and service life.

Cemented carbide insert passivation geometry has a great influence on the service life of the blade, there are mainly two kinds of edge passivation shape:a circular arc edge, form a symmetrical arc in the corner of the blade, blade passivation for more than 80% of the use, applicable to coarse and fine processing; the other is the waterfall edge in the mouth, the corner edge of the top surface and the side forming ratio of asymmetrical arc 2:1, suitable for the impact of bad processing.

Method of carbide cutting edge passivation is also in constant development, the earliest use of manual and mechanical passivation, passivation passivation to improve efficiency and quality, with the continuous development of technology, there are special CNC edge passivation machine.

The cemented carbide blade passivation technology is one of the effective measures to improve the service life of the blade. It is feasible and effective in the two aspects of economy and technology

It must be noted that,circulating for cutting temperature in the cutting process,the maximum and minimum temperature remained unchanged, and has no effect on the gasket type. Therefore, the compression of the thermal stress can be controlled by the volume of the temperature for carbide insert in the cutting process in cutting. Before the start of cemented carbide preheating can reduce high initial stress, which helps to improve the performance of the tool.

Posted by: hannahgwendolyn at 09:42 AM | No Comments | Add Comment
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