What are the requirements for component hardness in finishing

Today, Wuxi kaihan Technology Co., Ltd. will introduce finishing. Finish machining, that is, fine machining, is the processing with high-precision processing machinery. There are two main ways to achieve the precision machining of parts: one is to use a high-precision machine tool to process high-precision parts; Second, use error compensation skills to improve the processing accuracy of parts. However, this boundary is constantly changing with the progress of processing skills. Today's meticulous processing may be tomorrow's general processing. Fine machining process refers to all kinds of machining processes whose machining accuracy and surface brightness are higher than those of the corresponding machining methods. The fine machining process includes fine cutting (such as diamond boring, fine turning, wide edge fine planing, etc.) and high brightness and high precision grinding. The precision of fine machining is generally 10~0.1 μ m. The tolerance grade is above IT5, and the surface roughness Ra is 0.1 μ M below.

The process of cutting a thin layer of metal on the surface of the workpiece with high or low cutting speed, small cutting depth and feed rate relying on high precision, rigid machine tools and fine grinding tools. Obviously, this process can significantly improve the machining accuracy of parts. Due to the small residual area in the cutting process and the elimination of adverse effects such as cutting force, cutting heat and vibration to a large extent, the surface deterioration layer left by the previous process can be effectively removed. After machining, the surface is basically free of residual tensile stress, and the roughness is greatly reduced, greatly improving the surface quality.

The materials for finishing are divided into two categories, metal materials and non-metallic materials. As for metal materials, the hardness is stainless steel, followed by cast iron, followed by copper, followed by aluminum. The processing of ceramics and plastics is attributed to the processing of non-metallic materials.

The finish machining mainly requests the hardness of materials. For some places, the higher the hardness of materials, the better. It is only limited to the hardness request of machined parts. The processed materials cannot be too hard. It is assumed that they are too hard to machine. The soft and hard materials are moderate, at least one level lower than the hardness of the parts. It also depends on the role of the processing equipment and the reasonable selection of materials for the parts.

There are still some requirements for finishing materials. Not all materials are suitable for processing, for example, too soft or too hard materials. The former is not necessary for processing, and the latter cannot be processed. Therefore, we must pay attention to the density of materials before processing. It is assumed that the density is too large, which is equivalent to the hardness. If the hardness exceeds the hardness of the machine parts (lathe tools), it cannot be processed. It will not only damage the parts, but also pose a danger.

That's all for today. If you want to know more about finishing, please pay attention to Wuxi Bill Technology Co., Ltd.