When the table moves, the roller on the rack in the indexer slides in the sliding groove of the angle gauge. Since the sliding groove of the angle gauge has a certain angle with the moving direction of the table (manually preset), the roller is given a force perpendicular to the moving direction of the table, so that the roller drives the rack to move, and the rack drives the gear to make the gear The spindle of the indexer rotates, and the chuck that is fixed on the spindle of the indexer drives the hob between the chuck and the tip of the tailstock to rotate. The hob adds one axial movement relative to the grinding wheel. The additional rotation enables the grinding wheel to machine a helix angle on the rake face of the hob with the angle between the angle gauge chute and the table movement direction to achieve the sharpening of the hob (if the rack is mounted above the gear, the machining is performed The spiral angle is opposite to the direction of the angle between the angle gauge chute and the table movement direction). The device is easy to operate and easy to adjust. Determination of the helix angle of the rake rake face When the hob sharpening is performed, the helix angle of the tool must be measured first (the measurement method is not described here), and then the angle of the angle gauge is adjusted according to the measured helix angle, and the helix angle profiling device is adopted. This process can also be completed. Specific operation method: the worn tool with a helix angle is mounted on the chuck of the indexer and supported by the tip of the tailstock; the main shaft of the tool grinder is mounted with a metal material similar in shape to the grinding wheel. Simulate the tool and adjust the machine tool so that the simulated tool falls into the spiral groove of the tool to be tested, loosen the lock nut of the angle gauge, and move the table by hand; due to the limit of the simulated tool, while the table moves The simulation tool forces the workpiece to rotate, and drives the gears fixed on the spindle of the indexer to rotate, so that the rack is displaced. When the rack is displaced, a lateral thrust is applied to the angle gauge through the roller, so that the angle gauge is rotated to obtain the tool to be tested. The angle of the helix angle is consistent; after the helix angle is measured, tighten the lock nut of the angle gauge, remove the simulated tool of the workpiece to be tested, and replace the grinding wheel to sharpen the rake face of the hob. The effect is improved by using a spiral angle profiling device to modify an old-fashioned tool grinder of a machinery factory for the spiral groove surface (fore face) of the gear hob, which has achieved good results. In addition to the gear hob, other tools with spiral grooves, such as milling cutters, drill bits, reamers, etc., can be sharpened on the tool grinding machine modified by the device.
Process analysis The part is a composite part of stretching and shrinking, and the process is difficult to process in the shrinkage process. Since the production of parts is not large, it is not economical to use multiple sets of simple molds or more complex composite molds. Stretching and shrinking dies are essential to complete part machining. In addition, the anisotropy of the sheet and the unevenness of the gap of the drawing die will cause the top of the part after the drawing to be uneven, so the top of the part must be trimmed. Considering that the parts after stretching are a thin shell, the material strength is low, the rigidity is poor, and so on, it is difficult to solve the trimming problem; the spinning process can naturally solve the shrinkage problem, but it must have a spinning lathe. At the same time, the quality of the product depends on the technical level of the operator, and the production efficiency is low and the labor intensity is high. In the above-mentioned analysis, the design of the vehicle's internal expansion type shrinkage aid was designed to design the vehicle's internal expansion type shrinkage aid. After the blank is stretched, it can be directly used on the lathe for spinning and turning trimming with the shrinking aids for the car to produce qualified parts. The auxiliary structure and the parts stretched during the working process are rotated by the vehicle with the internal expansion type auxiliary device.
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