Radial fine-tuning boring device adjustment principle The spiral-wedge consists of a meridional fine-tuning device, as shown. The axial side of the cutter bar is slotted to install the axial differential feed screw, and at the same time, as the guide groove of the radial trimming wedge 3, the wedge 3 has a screw threadedly screwed with the fine adjustment screw 1 , and the two ends of the screw 1 are respectively supported by the cutter head 8 In the right side of the light hole of the slider 2, the lower end of the slider 2 is fixedly connected with the screw nut, and the upper end is fixedly connected with the cutter head, and the fine adjustment screw 1 is rotated to drive the wedge 3 to move left and right. The tool radial adjustment is achieved by driving the tool to move radially through the ramp. The cutter head 8 is guided by the slider 2 and transmits torque, and the spring 5 can eliminate the gap of the spiral pair to ensure the adjustment precision. The principle of radial fine adjustment is to rotate the screw 1 during radial adjustment, and the wedge 3 (movable nut) can move a small distance in the cutter head 8 to force the cutter head 4 to move radially a distance e under the action of the inclined surface thereof. The diameter of the cutout hole is increased by 2e. The relationship between the moving distance L of the sliding wedge 3 and the rotation angle φ of the screw 1 is sL2 in the formula s?? Adjusting the screw thread lead, the distance e of the cutter head 4 moving in the radial direction and the angle of the screw 1 The relationship is e=Ltanα, so when the screw 1 rotates the φ angle, the hole diameter is increased to tanese L2, so that the adjustment amount of the tool diameter can be directly read from the side dial of the cutter head 8 by the rotation angle of the screw 1 (not shown), and the hole is raised. The dimensional accuracy. The adjustment precision example uses the radial fine adjustment device. When machining a hole of a certain size, the cutter head of the corresponding length is selected. If the lead of the screw 1 is s=1 mm, there are 50 scales on the dial, and the wedge inclination angle is 12°. Then, the adjustment screw 1 is rotated through a scale, and the aperture is increased to etan. Mmee20s1212008, the radial fine adjustment accuracy is 8‰mm, and the weekly adjustment is Δφ=0.4mm. Advantages of the improved boring device (1) The structure is simple, the cost is low, the assembly and disassembly is convenient, and the performance of the machine tool is not affected. (2) The spiral trimming mechanism of the spiral wedge is adopted on the cutter head, which makes the radial adjustment of the cutter very convenient, greatly improves the machining precision and machining efficiency, and can compensate the wear of the cutter. (3) The axial direction adopts the planetary gear train differential? The screw feed mechanism has a compact structure and a large transmission ratio, so that the cutter can be realized, and the amount of the cutter can be changed to meet the production requirements. Conclusion On the ordinary lathe, the improved boring device is used for boring, which improves the processing precision and processing efficiency, and the process performance is stable, which can meet the processing precision requirements, so that the large-scale cylinder processing and maintenance of coal mine hydraulic support equipment can be ordinary. The lathe is completed, which solves the production problem of lack of special equipment and tools, and reduces production costs. (Finish)
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