The current consumption of PCD tools is increasing year by year. PCD tools are generally only suitable for processing non-ferrous metals, aluminum, copper, composite materials and graphite products because of their high hardness. In the finishing of some ferrous metals or the processing of small allowances, under the condition of good cutting temperature control, the finishing of non-ferrous metals, PCD tools also show extremely strong wear resistance.

PCD tool

1. Price changes

In the past, high price has been a major obstacle to the widespread acceptance of PCD (polycrystalline diamond) tools, but now the situation has changed a lot. The industry estimates that in the past two or three years, the price of PCD tools has dropped by 40~60%. One of the reasons for the "diving" of PCD tool prices is the oversupply in the market. In the early 1990s, PCD cutting tools began to outpace traditional carbide cutting tools, and the market demand for PCD cutting tools continued to increase in the following decade. However, with the maturity of PCD tool manufacturing technology, its sales growth momentum began to slow down. In addition, new competitors entering the PCD tool manufacturing industry have also shaken the original market price system. Another reason for the decline in the price of PCD tools is the continuous reduction of tool manufacturing costs and the continuous improvement of tool manufacturing processes. In addition, the quality and cost of diamond grinding wheels for PCD tools have been significantly improved compared to ten years ago. my country's demand for PCD tools is increasing.

2. Tool features

Machining aluminum workpieces with PCD tools has the advantages of long tool life and high metal removal rate. The disadvantage is that the tools are expensive and the processing cost is high. This point has formed a consensus in the machinery manufacturing industry. But in recent years, the development and application of PCD tools have undergone many changes. The performance of today's aluminum materials has changed. When processing various newly developed aluminum alloy materials, in order to achieve the optimization of productivity and processing quality, the grades and geometric parameters of PCD tools must be carefully selected to adapt to different Processing requirements. Another change of PCD tools is the continuous reduction of processing costs. Under the combined effect of market competition pressure and tool manufacturing process improvements, the price of PCD tools has dropped significantly by more than 50%. The above changing trends have led to the increasing application of PCD tools in the processing of aluminum materials, and the applicability of the tools is restricted by different materials to be processed.

3. Correct use

When cutting aluminum alloy materials, the roughing cutting speed of cemented carbide tools is about 120m/min, while the cutting speed of PCD tools can reach about 360m/min even when roughing high-silicon aluminum alloys. Tool manufacturers recommend fine-grain PCD grades for machining silicon-free and low-silicon aluminum alloys. Coarse-grain PCD grades are used to process high-silicon aluminum alloy materials. If the surface finish of the milled workpiece does not meet the requirements, a wiper blade with a smaller grain size can be used to polish the surface of the workpiece to obtain a satisfactory surface finish.

The correct application of PCD tools is the premise of obtaining satisfactory machining results. Although the specific reasons for tool failure vary, it is usually due to the incorrect use of objects or methods. When ordering PCD tools, users should correctly grasp the adaptability of the tools.

In general, in order to reduce the cutting force and prevent the formation of built-up edge, the PCD tool should adopt a positive cutting angle. However, when machining high-silicon aluminum alloys, the relief angle of the PCD tool is preferably slightly smaller than that of the original cemented carbide tool, so as to improve the cutting performance of the PCD tool cutting edge on the high-silicon aluminum alloy. The positive rake angle of the PCD tool should not be too large, because the larger the rake angle of the tool, the lower the strength of the cutting edge. In other words, the smaller the relief angle of the PCD tool, the higher the strength of the cutting edge.

PCD tool

With the rapid development of science and technology, the field of PCD tools is also on the rise. Excellent tool life, ensuring product dimensional consistency. At the same time, the labor intensity of workers is reduced, and frequent tool changes are not required. Therefore, it is inevitable that the share of PCD tools in the applicable field will maintain an upward trend.