GB1449590A - Flat die thread rolling machine - Google Patents

Abstract

1449590 Thread rolling machines W M JACKSON 23 June 1975 [20 Nov 1974] 26587/75 Heading B3M A thread rolling machine comprises a stationary flat die, and a movable flat die reciprocable along a first path, and means mounting the stationary die for adjustment relative to the fixed die, the mounting means comprising two members respectively movable along linear paths parallel and perpendicular to the first path, and two members respectively angularly movable about axes parallel and perpendicular to the first path, one member carrying the die and being supported by the others so as to share in their movement, whereby the alignment and spacing of the two dies and their relative orientation may be adjusted. In the embodiment shown, these adjustments can be carried out during operation of the machine. The movable die 14, Fig. 2, is reciprocable along a bed 19 by con-rod 20, eccentric 21, flywheel 23, shaft 24, and belt drive 25. Blanks 11 are fed from a vibratory bowl (not shown) down a gravity feed track 26 to a gate spring 27 across the track. A feed finger 28 is reciprocated by wedge and roller mechanism 31, 33 operated by eccentric 39 so as to feed one blank past spring 27 to between dies 13, 14 when in the position shown. The fixed die 13 is mounted on a succession of four members 44, 45, 46, 47, see also Fig. 6. Member 44 can be adjusted along bed 16 in a direction parallel to the die stroke and locked in position by screws 57, 59 to adjust alignment of the dies in the starting position. Member 45 is rotatable over member 44 on pivot pin 61 by set screws 65 and abutment 66, the axis of pin 61 passing through the leading ends of the formations 43 on die 13, so that the "squeeze" angle a, Fig. 2, can be adjusted. Member 46 can be adjusted along member 45 in a direction perpendicular to the die stroke, and locked in position, by screws 79, 81 to adjust the spacing between the dies to suit the blank diameter. Member 47 is adjustable about pin 95, and can be locked in position, by screws 99, 100 to vary the die slope to suit the taper of the blank. The member may be finally clamped by screw 103 received in hole 104. The blank guide track 26 is secured to arm 87 on member 46, and the blank feeding finger mechanism is mounted on a tongue 85 also on member 46.