A machine tool for working toothed wheels by means of a toothed tool, comprising a device for measuring the forces acting on the toothed tool or toothed wheel

摘要

1,042,492. Gear-finishing. CARL HURTH MASCHINENUND ZAHNRADFABRIK. April 5, 1963 [May 8, 1962], No. 13723/63. Headings B3B and B3K. In a gear-finishing machine for external or internal gears, the force exerted between the tool and work is measured. The shaft 11 of the shaving cutter 10 is mounted in a sleeve 13 by a bearing 12 which allows the shaft to pivot about the point 14 or 14SP1/SP. Elastic and labyrinth packings 15, 16 are provided. The sleeve 13 is eccentric so that it can be turned by a lever 21 to provide a fine feed. At the end remote from the cutter, the shaft 11 is supported in needle bearings 43 in a block 42 carried on tension strips 28, 29. Movement of the block is prevented in one direction by a screw 44 and is measured in the opposite direction by a hydraulic gauge 45. The block 42 and its housing 24 are carried on an angularly adjustable flange 22 so that the point of maximum radial force on the spindle can be determined. Pressure in the measuring system is provided by a hand-pump 54, Fig. 3 (not shown). The gauge enables the operator to judge whether the feed is too little or too much, whether the cutter is blunt or whether the workpiece is not running true. It can also be used for controlling crowning or elimination of crowning or unevenness. A second gauging means may be fitted, instead of the screw 44, which provides a damping effect. Other gauging means may be fitted to measure the force axially of the cutter. Forces on the work may be measured, or torque forces. The measurement means may incorporate electrical capacitances, carbon columns, crystals or pneumatic gauging means.