GB1470028A - Apparatus for chip-forming machining of gearwheels - Google Patents

Abstract

1470028 Milling HURTH VERWALTUNGS GmbH 29 Oet 1975 [8 Feb 1975] 44709/75 Heading B3K Apparatus for the chip-forming machining of the ends of the teeth of a gear-wheel 6 comprises a tool headstock 18 and a workpiece headstock 3, the headstock being mounted for relative sliding movement parallel to two coordinate axes at right angles to the axis of the workpiece headstock, the tool headstock having a rotatable tool spindle 27, being pivotally mounted about a pivot axis which is perpendicular to the axis of rotation of the spindle and is neither parallel nor perpendicular to the axis of the workpiece headstock and being fixable in selective pivot positions about the pivot axis. The gear-wheel 6 is mounted on a spindle 4 of the workpiece headstock 3 which is adjustable parallel to the spindle along guideways 2 on a frame 1. The spindle may be continuously rotated during radiusing of the ends of the gear teeth by an end mill or rotated stepwise for machining with a hob cutter. A further guideway 7 on the frame supports a horizontally movable slide 8 provided with a guideway 11 for a pair of housings 9, 10 which are adjustable along the guideway by a screw 26 and can be clamped in position by bolts 12. The guideway 7 permits the slide 8 carrying the housings to present the tools to the workpiece 6 on the headstock 3 or to a second workpiece on a further headstock (not shown). Each housing 9, 10 has a vertical guideway 13 for a cylindrical slide 14 rotatably and axially adjustable in the guideway. The head 16 is bolted to the upper end of the slide and has an inclined surface 17 and supports a tool headstock 18, 19 which is rotatably adjustable on the surface 17 by means of a circular T-slot 20. Vertical adjustment of the slide 14 and head 16 is effected by a tappet 21 having a nut 22 engaging a screw 23. A tool 29, such as an end mill or bobbing cutter, is mounted on a spindle 27 in a headstock 18, 19 mounted on the inclined surface 17. The spindle is rotated by an electric motor 28 and may be axially reciprocated in a grill having a roller 30 engaged by a cam 31 on a holder 32 which is supported by bearings 33 in the head and connected by a universal joint 35 to a shaft 34 driven in synchronism with the spindle 4. To set the tool headstock to a desired inclination, the tool headstock is rotatably adjusted on the inclined surface 17 and the slide 14 is rotatably adjusted in the guide 13.