When reaming, first expand the (5) 40mm hole to (5) 60mm and then to (5) 80mm. After all 24 bolt holes are machined to (5) 95mm, place the workpiece on the coordinate boring machine and adjust the position of the boring tool to the center of the cross. Coincident and clear the coordinate value. According to the calculated theoretical value of the center of each bolt hole, the position of the file is adjusted in turn, and the hole is machined to (5) 115 mm. When machining the threaded hole at the end of the barrel, first drill and ream it to (5) 95mm and depth 165mm. Use the above method to find the correct, then use the trampoline to pry the hole to (5) 98.8mm, and use the motorized wire to process the M110mm thread. Cutting amount selection In the drilling process, factors such as the strength, hardness, pore size and depth of the workpiece should be considered, and different cutting amounts should be selected according to the depth of each stepped hole. Since the workpiece is a general material, a high speed steel twist drill is used. According to experience, when the hole diameter of the reaming is (5) 40 (5) 60 mm, the feed amount is selected to be 1.2 mm / r; when the hole diameter of the reaming is (5) 60 (5) 80 mm, the feed amount is selected to be 1.4 mm / r. Cutting hole diameter/mm cutting speed/ms-1 feed amount/mmr-1(5)80200.80(5)60200.70(5)40150.601.4 Coolant selection Because deep hole machining is performed in a closed environment, the cutting heat is not easily diffused, so the heat dissipation is The main problem, lubrication is a secondary issue. A large flow of extreme pressure emulsion can be injected into the cutting edge to remove the cutting heat in time to extend the life of the tool. Note: Although the diameter of the hole is large, there are not many equipment to choose from, but when drilling the stepped hole, the rocker drilling machine with high power and rigidity should be selected to reduce the tool-machine system of the drilling. vibration. During the drilling process, it is necessary to observe the condition of the chip on the cutting edge of the drill, and remove the chips in time to facilitate the injection of the cutting fluid and also facilitate the continuous chip removal. Always pay attention to the condition of the drill bit. If it is found that the wear is too large, the drill bit should be replaced in time. Do not stop the rotation of the drill spindle until the drill bit has completely exited the bolt hole to avoid breaking the drill bit. The coaxiality of the flange bolt holes and the screw holes at the end of the barrel processed by the machining process described in the text completely meets the requirements. At the time of installation, all 24 bolts were smoothly loaded. This method can complete the processing of large-diameter deep holes. Although there is no special deep-hole drilling machine, the method is more complicated, but it is a feasible solution. Lens,Fused Quartz Cuvette,Optical Elements &Components,Quartz Convex Lens Yixing Jingke Optical Instruments Co.,Ltd. , https://www.jkgxcn.com