Optimizing the analysis of deep holes in a lathe production equipment
Processing technology analysis Due to the difficulty of chip discharge in deep hole machining, the cooling and heat dissipation conditions of the tool are poor, the axis of the hole is easy to be skewed, and the toughness of the processed material is large, so the chip and the tool are prone to sticking. In response to these situations, the following measures are taken during processing to improve the machining conditions: 1) The workpiece is rotated and the tool feed mode is used to avoid the tool deflection to improve the linearity of the hole. 2) Use a suitable tool structure to facilitate the smooth discharge of chips. 3) Pressure spray method is used to cool the lubrication tool and facilitate the discharge of chips. Since there is no dedicated deep hole bed, the hole is machined on a modified C6163 lathe. The specific process measures, machine tool modification, because there is no special equipment to process deep holes, so a C6163 ordinary lathe is converted into a simple deep hole processing system. The hole is made of push block and front chip removal for easy installation and size adjustment. A key point of this machining process is that the rotational speed of the drilling head must be high. The bit speed should be above 300r/min, while the 1.5 bit should be above 6000-8000r/min. Generally, the general drilling head does not meet this requirement and must be modified. Otherwise, the drill bit is easily broken and does not work properly. As for the workpiece fixture, we use the bevel positioning, cam clamping scheme, which is fast and labor-saving, and will not be described here. The matching precision is matched by h6 clearance. The shank extends into the hole and can slide, mainly guiding, to ensure that the end face of the slant is perpendicular to the hole. The white steel knife 7 is mounted in the square hole at the right end of the arbor. When making a square hole, make sure that its axis is perpendicular to the axis of the shank. The square hole geometry is also accurate, and it uses K6 transition fit with the white steel knife. The front and rear corners of the white steel knife should be sharpened according to the material of the workpiece. The cylindrical end of the screw end is embedded in the long groove in the middle of the shank so that the sliding sleeve can only slide along the axial direction of the shank and cannot rotate in the radial direction. The thrust bearing is mounted on the arbor between the sliding sleeve and the adjusting washer, the tight ring is located at one end of the sliding sleeve, and the loose ring is located at one end of the adjusting washer. Adjusting washers can be made in several different thicknesses to accommodate different thickness workpieces. When working, manually punch the hole in the workpiece. Use the hinge bar to move the square end of the left end of the knife bar. The nut and the sliding sleeve and the white steel knife rotate together with the knife bar. The blade then starts to scrape the boss surface. When a feed is required, a small nut can be rotated. This will gradually flatten the boss. In order to make the tool suitable for workpieces with different apertures, several sets of bushings with different outer diameters can be made. The inner hole of the bushing and the shank are matched by a K6 transition fit. The outer diameter of the bushing is still mated with the h6 clearance of the hole of the workpiece. Simply attach the appropriate bushing to the right end of the toolholder and use this tool to flatten the boss faces of different apertures. (Finish) Loading Dock,Dock Leveler,Truck Lift Platform Sunli Industry Equipment Co., Ltd. , http://www.dopro-rack.com