Selection of cutting parameters in deep hole machining
ã€China Deep Hole Rig Trading Network】 Application of CNC Deep-hole Drilling Machine The tool introduced in the numerically controlled deep-hole drilling machine is a gun drilling system. After being put into use, iron clogging and other problems often occur during processing, and it cannot work normally. Later, through practical research and analysis, it was observed that this type of problem is related to the selection of processing parameters. For this reason, in light of the characteristics of high-alloy high-alloy chromium-molybdenum steel and ultra-low carbon stainless steel, the point of practice in the selection of gun drilling processing parameters was discussed. Experience. Gun drill processing application features Gun drill is an effective deep hole machining tool, its processing range is very Wide, deep hole processing from plastics such as glass fiber and Teflon to high-strength alloy steels (P20 and Cr-Ni alloys). In deep hole machining with tight tolerances and surface roughness requirements, gun drills can ensure hole dimensional accuracy, positional accuracy, and straightness. Gun drilling is also a commonly used tool in deep hole drilling. The gun drilling system consists of a deep hole drill, a double-edged gun drill and a high pressure cooling system. The gun drill handle is clamped on the spindle of the machine tool, and the drill bit enters the workpiece table through the guide bush. On the surface, the unique structure that enters the back-drilling edge serves as a self-directing effect, assuring cutting accuracy. At this time, the coolant passes through the channel in the middle of the drill bit to reach the cutting position, and the chip is taken out of the chip flutes out of the surface of the workpiece. At the same time, the cutting edge is cooled and lubricated on the support boss of the back so as to obtain a good machining surface and processing quality. The biggest difference between this kind of tool and ordinary tool is that it uses internal cooling swarf. The so-called internal cooling swarf is the high pressure oil directly from the middle of the drill pipe into the cutting area, and the chips are discharged from the V-shaped groove of the drill pipe. . However, the weakness of the inner cooling swarf is that it is prone to chip clogging and cannot be discharged smoothly. Therefore, in the case of gun drilling, the shape of the chip to be drilled is required to be particularly high. Generally, it is required that the iron chips to be drilled be spiral and have a uniform length (about 5 times the hole diameter) to facilitate the discharge of iron chips. The main method for selecting the processing parameters of special materials Difficulties in gun-drilling processes are related to the shape and length of the chips. The shape of the iron scraps depends on the main processing parameters of the gun drill. In gun drilling, the selection of machining parameters is more stringent than that of ordinary cutters. Once the processing parameters are not appropriate, not only the machining efficiency and machining accuracy are affected, but even normal machining cannot be performed normally because the scrap iron cannot be discharged. Therefore, it is particularly important to select suitable processing parameters according to the characteristics of different materials. The CNC deep-hole drilling machine imported by Germany TBT Company is used exclusively for thick tube plate processing equipment. The drill pipe length, tool geometry parameters and carbide grades in the gun drill are all provided by the supplier. The factory needs to determine the other three main processing parameters of the gun drilling process based on the processed material and the hole diameter: parameter speed (r/min), feed rate (mm/min) and cooling lubricant flow (L /min). For more information, please pay attention to the China Deep Hole Rig Trading Network () Garden Tractor,Compact Tractors,Mini Tractor,Yard Tractors Hunan Nongyou Machinery Group CO.,LTD , https://www.harvesterequipment.com