Machine à tailler des engrenages hélicoïdaux et hypoïdes

摘要

929,164. Gear-cutting. GLEASON WORKS. Dec. 14, 1961 [Feb. 6, 1961], No. 44882/61. Class 83 (3). A machine for cutting spiral bevel or hypoid gears with a face mill cutter comprises a frame 10 having heads 11, 12 carrying rotary spindles 13, 16 for the gear G and tool C mounted for separate rectilinear horizontal adjustment, the work-spindle being inclined to the horizontal with the workpiece mounting at its upper end and the spindle lying in a vertical plane extending in the horizontal direction, the work-head being adjustable in a vertical plane perpendicular to the work-spindle, the cutter-head being adjustable about an axis 29 in a vertical plane and perpendicular to the work axis 14, the cutter head also being adjustable parallel to the work axis, and the axis 17 of the cutterspindle being perpendicular to the axis about which the cutter-head is adjustable. The cutter may be as described in Specification 884,741. The head 11 is adjustable on guides 18 on a slide 19 adjustable on guides 21 on a plate 22 by a piston-and-cylinder 23, 26 to move the work from a loading position G1 to a cutting position. The plate 22 is adjustable transversely for cutting right- or left-hand spirals. The head 12 is adjustable on circular ways 28 on a slide 30 adjustable on guides 31 on a column 32 adjustable transversely on ways 33. The slide 19 is clamped by hydraulic means 34 during cutting, the only movements being axial and rotational movement of the cutter and indexing of the gear. The spindle 16 is moved by a cam 39 acting through a lever 42 having an adjustable bearing point 43 on a plate 45 on a block 36. The block 36 carries the rear bearings 37 for the spindle and is urged rearwardly by springs 38. The cam 39 is carried on a slide 47 which is urged forwardly by an hydraulic piston against an adjustable stop 54. In operation, when hydraulic pressure is released, the springs 38 withdraw the cutter spindle and the cam slide, and subsequently the work-slide is withdrawn. The cam slide 47 is clamped during cutting by hydraulic means 62. The machine may finish-cut gears in which case the cutter makes, say, ten axial reciprocations during a revolution to cut a tooth-gap, or may rough-out gears, in which case the cutter makes several revolutions to cut a tooth-gap.