Tips for using the Machining Center（3）

How does the machining center reduce the surface roughness of the workpiece?
Rough surface of parts is one of the common problems in CNC machining centers, which directly reflects the processing quality. How to control the surface roughness of parts processed, we must first conduct an in-depth analysis of the causes of surface roughness, which mainly include: tool marks caused during milling; thermal deformation or plastic deformation caused by cutting separation; cutting tools and machined surfaces friction between.
When selecting the workpiece surface roughness, it should not only meet the surface functional requirements of the part, but also consider economic rationality. On the premise of meeting the cutting performance, a larger surface roughness reference value should be used as much as possible to reduce production costs. As the executor of the cutting machining center, tools must be regularly maintained and sharpened in time to avoid unqualified surface roughness caused by blunt tools.

What should I do after finishing the work in the machining center?
Generally speaking, the machining process procedures of traditional machine tools in machining centers are roughly the same. The main difference is that the machining center completes all cutting processes continuously and automatically through one clamping. Therefore, the machining center must perform some “Aftermath work”.

1. Carry out cleaning. After the machining center completes the cutting task, it is necessary to promptly remove the chips, wipe the machine tool, and keep the machine tool and the environment clean.
2. When inspecting and replacing accessories, first pay attention to checking the oil wiping plate on the guide rail. If it is worn, replace it in time. Check the status of the lubricating oil and coolant. If turbidity occurs, replace it in time. If the water level is lower than the scale, add more.
3. The shutdown procedure must be standardized, and the power supply on the machine tool operation panel and the main power supply should be turned off in sequence. In the absence of special circumstances or special requirements, the principles of returning to zero first, manual, inching, and automatic should be followed. The machining center should also operate at low speed, medium speed, and then high speed. The low-speed and medium-speed operation time shall not be less than 2-3 minutes without any abnormality before starting work.
4. Standardize the operation. Do not knock, straighten or correct the workpiece on the chuck or at the tip. The workpiece and tool must be confirmed to be clamped before proceeding to the next step. The insurance and safety protection devices on the machine tool must not be disassembled or moved at will. The most efficient processing is actually safe processing. As an efficient processing equipment, the operation of the machining center must be reasonably standardized when shutting down. This is not only to maintain the current completed process, but also to prepare for the next start of work.