Compared with large-scale machining centers, the occupied area of stainless steel five-axis machining centers is not large, but the processing efficiency of five-axis machining centers has obvious advantages compared with large-scale equipment. Spindle power. It is also because of this that a large amount of heat will be generated on the surface of the cutting tool and cutting tool during the processing. If the heat cannot be cooled in time, it will have a certain impact on the processing effect.
The cutting fluid of the five-axis CNC machining center mainly has the function of lubrication and cooling. When lubrication is the main function, the cutting fluid is transported to different parts to form an oil film on the friction surface. If you want to use the cooling effect of cutting fluid, you should choose water-based cutting fluid to deliver to the cutting position close to the tool. Under such conditions, it is usually necessary to use pressure to spray cutting fluid into the cutting area, so as to take away the heat generated by the friction and deformation of the tool, workpiece, and chips.
The following two methods are most commonly used in the cooling process of stainless steel five-axis machining centers.
1. Overflow cooling method
The most common method of using cutting fluid for stainless steel five-axis machining centers is the overflow method. Let the cutting fluid flow out through the nozzle of the valve. The nozzle is installed close to the cutting area. The cutting fluid flows through the cutting area and then flows to different parts of the five-axis machining center, and then collects in the oil collecting pan, and then flows back from the oil collecting pan to In the cutting fluid tank, it can be recycled. The cutting fluid tank should have enough volume to allow the cutting fluid to have time to cool down and settle fine chips and abrasive particles. Although this method is the most commonly used, it is also necessary to prevent large metal debris from being mixed in and scratch the surface of the workpiece. A coarse filter should be installed in the oil collecting pan, and a fine filter should be installed at the oil suction port of the pump. .
2. High pressure cooling method
In special deep hole drilling, it is necessary to supply oil with high-pressure cutting fluid system. Similar to the machining process of boring, single-edged drills are generally used for drilling, but there is a passage for cutting fluid inside the drill. The main problem in deep hole drilling is how to maintain sufficient cutting fluid flow in the cutting zone. The chip groove is used as the passage of cutting fluid. The pressure of cutting fluid is 0.35-0.69MPa. After passing through the rotating sealing sleeve, it flows into the drill bit, and then directly enters the cutting area. The cutting fluid flowing out of the hole helps to remove chips. In the process of hole processing, the method of high pressure cooling is more ideal than the overflow method. For simple machining operations such as drilling and tapping, the lubricant can be applied or dripped onto the tool or workpiece using a fine-bristle brush.
