Patent GB-1376045-A (GB)
Title: Gear finishing machine
IPC: B23F23/12
Filed: 1972-06-30
Abstract: 1376045 Honing gears; burnishing gears; rolling gears; finishing gears LEAK SIEGLER Inc 30 June 1972 [6 July 1971] 30708/72 Headings B3D B3X B3M and B3K A gear finishing machine, such as a gear honing, shaving, burnishing or rolling machine, comprises a first carrier for a first rotary support adjustably mounted on a frame for movement towards a second rotary support on a second carrier, the supports carrying a gear and a gearlike tool, the second carrier being movable towards and away from the first, means for rotatably driving one of the supports, means for feeding the second carrier towards and away from the first to establish a form between the gear and tool, means for angularly adjusting one of the carriers about an axis perpendicular to the axes of the supports, and means for traversing one of the supports on the frame. As described, the workpiece W is mounted between head and tail stocks 14 on a tilt table 12 rockable about a horizontal pivot 18 on a frame 10, by an hydraulic device 20 having a pistonrod, the upper part 22 of which is connected to the table and the lower part 24 of which cooperates with a limit switch LS1, shown diagramatically in Figure 2. A sub-slide 26 is reciprocatable along guides 28, 30 parallel to the pivot 18 and carries a hone slide 32 movable perpendicularly to the pivot 18 by a motor 34 driving through a belt 36 a screw 40 engaging a nut 42 on the slide 26. A hone support 44 is mounted for adjustment about a horizontal axis on the slide 32. The lower end 24, Fig. 3, of the piston-rod carries a crosshead 56 and engages a pin 68 which is slidable in a guide 70 secured to a mounting plate 58, the pin abutting a lever 62 rockable about a pivot and actuating the limit switch LS1. The crosshead has an adjustable abutment 28 engaging a pin 82 which abuts a dog 20 which is rockable about a pivot 88 and actuates a dial indicator 84. In operation, a first of a succession of gears is mounted in the machine and a new, or newly dressed, hone is meshed with the gear by movement of the hone slide 32, the table 12 rocking until the limit switch is operated. The indicator is set to zero and honing is effected by pressure supplied to the device 20. The gears are automatically loaded and unloaded into the machine until operator observes that the hone bottoms. The operator notes the indicator reading and dresses or replaces the hone and resets the slide 32 to the position determined by the limit switch LS1. Honing is then continued until the noted reading on the indicator is again reached indicating that the hone has worn. A signal indicating hone wear may be produced by a limit switch LS2 actuated by an adjustable abutment 96 carried by the crosshead 56.  In order to measure the honing pressure, a calibrated leaf spring 100 has an inclined portion engaged by a pin 102 on the dog 90, the spring being formed by a slot 104 in a plate 106 retained in operative position by a movable lug 110 held by a clamping screw 112. With the hone or gear, or both, removed from the machine, pressure is supplied to cylinder 20 so that the pin 102 just engages the spring, the shoulder 94 of the dog engaging the plunger 86 of the indicator which is then zeroed. The pressure supplied to the cylinder 20 is increased to produce a predetermined displacement of the indicator needle. The spring opposes the movement of the piston of the cylinder and any reading on the indicator corresponds to excess of force over that required for unopposed movement of the table and thus the honing pressure.