豆传媒剧在线mv在线观看|传媒剧在线mv入口|9传媒剧在线mv在线看|豆传媒剧mv入口在线看|豆传媒剧在线观看免费|爱豆传媒剧情在线观看Precision instruments for precision machining in Dalian refer to the equipment and devices used to generate and measure precision quantities, including observation, monitoring, measurement, verification, recording, transmission, transformation, display, analysis, processing and control of precision quantities. It mainly includes precision instruments for temperature, humidity, pressure and flow detection, such as various barometers, vacuum meters, multi wavelength temperature measuring instruments, flow meters and altimeters.

Computer and automation technology: design and manufacturing process of various automatic instruments and meters; Sensors and automatic control technology in automation equipment; Precision machining豆传媒剧在线mv在线观看|传媒剧在线mv入口|9传媒剧在线mv在线看|豆传媒剧mv入口在线看|豆传媒剧在线观看免费|爱豆传媒剧情在线观看, not all materials can be precision machined. If the hardness of some materials is too high and exceeds the hardness of the machined parts, the parts may collapse. Therefore, these materials are not suitable for precision machining, except for parts made of special materials or laser cutting.

豆传媒剧在线mv在线观看|传媒剧在线mv入口|9传媒剧在线mv在线看|豆传媒剧mv入口在线看|豆传媒剧在线观看免费|爱豆传媒剧情在线观看There are still some requirements for materials in precision parts processing. Not all materials are suitable for processing, such as too soft or too hard materials. The former is not necessary for processing, while the latter cannot be processed. It will also cause danger, such as the lathe knife flying out and wounding people. Therefore, generally speaking, for mechanical processing, the material should be lower than the hardness of the machine tool, so that it can be processed.

豆传媒剧在线mv在线观看|传媒剧在线mv入口|9传媒剧在线mv在线看|豆传媒剧mv入口在线看|豆传媒剧在线观看免费|爱豆传媒剧情在线观看For the requirements of knowing the hardness of materials, for some occasions, the higher the hardness of materials, the better. It is only limited to the hardness requirements of processing machine parts. The processed materials cannot be too hard. If they are harder than machine parts, they cannot be processed. Precision machinery manufacturing is a process of changing the overall dimension or performance of the workpiece with processing machinery.

豆传媒剧在线mv在线观看|传媒剧在线mv入口|9传媒剧在线mv在线看|豆传媒剧mv入口在线看|豆传媒剧在线观看免费|爱豆传媒剧情在线观看According to the temperature state of the workpiece to be processed, it is divided into cold processing and hot processing. It is generally processed at room temperature without causing chemical or phase changes of the workpiece, which is called cold processing. Generally, processing above or below normal temperature will cause chemical or phase changes of the workpiece.