The processing of tungsten carbide roller

With the rapid development of the steel industry, to improve the output rate of steel, improve the utilization rate and productivity of the mill, and reduce the number of mill downtime, tungsten carbide roller, and roll rings came into being and are widely used in the rolling of high-speed wire rod. Although the emergence of tungsten carbide roller has brought great convenience, due to its own extremely high hardness, it is difficult to process, how to ensure product quality, improve production efficiency and reduce production costs, is the majority of carbide roll processing enterprises have been thinking about the problem. Today I will focus on the machining method of tungsten carbide roller and how to choose the tool material for machining cemented carbide rolls.

Here is the content list:

l The evolution of the tungsten carbide roller

l Carbide roll processing method and its tool selection rules.

The evolution of the tungsten carbide roller

Although tungsten carbide rollers are superior to other materials, they are very hard and difficult to machine. To make tungsten carbide roller more widely used in the steel industry, we must first solve the processing problems of tungsten carbide roller.

In the early days, people mainly used the grinding process to process tungsten carbide roller, but the efficiency of grinding is too low and affected the production efficiency, then with the continuous updating of tool materials, after years of practice and repeated tests by tool production engineers, finally developed a tool material that can be turned instead of ground, using turning instead of the rough grinding process, which greatly improves the production efficiency of tungsten carbide roller and reduces the production cost.

In the process of turning tungsten carbide roller, the hardness of the tool itself must be higher than the hardness of the workpiece to be machined, so the tool material for turning and processing tungsten carbide roller is mainly based on high hardness and high heat-resistant non-metal binder cubic boron nitride and diamond. Our company has rich experience in machining tungsten carbide rollers and can provide complete sets of carbide roll turning and grinding solutions.

Carbide roll processing method and its tool selection rules.

1、 Look at the hardness: tungsten carbide roller with hardness less than HRA90, you can choose HLCBN material or BNK30 material tool for large margin turning, large margin turning tungsten carbide roller, tools do not break and burn. When the hardness of the tungsten carbide roller ring is greater than HRA90, it has exceeded the machinable range of cubic boron nitride tools, generally choose diamond tools made of CDW025 or use resin bonded diamond grinding wheels for grinding. Generally, the higher the hardness, the more brittle the material, carbide is cut in the cutting edge "slag or chipping" lead to scrap workpiece, so for high hardness material cutting is more cautious, either in advance to do chamfering processing or the use of accurate reserved fine grinding allowance to avoid.

2、 Look at the processing margin and processing mode: if the processing of the outer surface or turning R3 above the groove, and the margin is large, generally first with HLCBN material or BNK30 material rough machining, and then grinding with a grinding wheel (resin bonded diamond grinding wheel to grind the outer circle or plane, roll hole type slotting and other molding grinding are generally used electroplated or metal bonded diamond grinding wheel); For processing the margin is small, either with a grinding wheel (such as chamfering process and grooving and another molding process can choose custom diamond tools); Generally speaking, cutting instead of grinding can improve the processing efficiency, and the carbide chips of the cutting method are easier to recover; Because the customization of molding grinding wheel needs cycle or needs mold, but the non-standard customization of molding tool is relatively fast, so the cutting method is used More conducive to improve the production cycle.

3、The CDW025 diamond engraving and milling cutter (also known as a flying cutter, or rotary milling cutter) is used for the processing of crescent groove carving ribs of rolls.

4、The rolls are divided into new and resharpening, the above way is not only suitable for the carbide roll factory to make new rolls for reference but also can be used as a steel mill to resharpen tungsten carbide roller.

When processing tungsten carbide roller, the tool may be passivated, the so-called passivation treatment is to solve the defects of the microscopic notch of the tool edge after sharpening, so that its front value is reduced or eliminated, to achieve the purpose of round and smooth, both sharp and strong and durable. But the passivation treatment can not be too big, because after passivation the tool edge contact surface becomes bigger, and cutting resistance also increases, tungsten carbide roller ring is a hard and brittle material, easy to cause chipping and damage to the workpiece.

Our company specializes in the production and processing of shaped non-standard carbide parts, and has rich and mature production experience in the processing of tungsten carbide roller, with a high level of blank forming and precision machining capabilities, with high precision optical curve grinding, Zeiss three coordinate inspection equipment, processing, and acceptance can be completed to a high standard more precise size and profile curve parts. If you are interested in a tungsten carbide roller ring or want to buy cemented carbide rolls. our official website is https://www.7jinxin.com/. You can communicate with us on the website. We look forward to serving you.