Patent GB-190510642-A (GB)
Title: Improvements in and relating to Machines for Punching Metal
Inventor: JOHNSON CHARLES AUGUSTUS
Filed: 1905-05-22
Granted: 1905-09-21
Abstract: 10,642. Johnson, C. A. May 22. Punching. - An automatic machine for simultaneously punching the various plates, angles, &c. of a built-up column or bridge girder &c. is shown in the Figures, the punches and the spacing- apparatus being controlled by adjustable pattern-cams. The punchholders 4, Figs. 1 and 17, are adjustable on a crossbeam 5 which is reciprocated on blocks 16 and the guides 7 on the main frame 6 by eccentrics 9 on the shaft 10, which is driven by gearing 11, 12 and the belt pulley 14. The flat sided dies 34, Fig. 2, are adjustable in grooves in the divided anvils 33 which are andjustable on a divided foundation-plate 35 beneath the groove in which runs a conveyerband 34<c> for carrying the punchings away. The pieces of work 30 are alined against a plate 231 and are then secured by clamping-rods 27, Fig. 7, to two carriages 23 which are clamped, when at a suitable distanceapart, to beams 21 supported on rollers (not shown). The flanges, of the work are pressed against rollers on supports 41, Fig. 1, between the anvils by rollers on spring-pressed levers on the anvils, the supports also carrying adjustable stripper-plates. When the cross-beam 5 is raised, a segmental wheel 66 on the shaft 10 rotates a shaft 68 which advances the beams 21 and the work with a gradually increasing and then gradually decreasing velocity and to a greater or less extent by means of the elliptical gearing 71, 72, one of the sets of bevel gearing of different velocity - ratios, one of the clutches 61, and the pinions 56 in gear with racks on the beams 21. These clutches are controlled by rock-shafts. 100 having arms 105, Fig. 10, on which heads 104, to engage collars 103 on a rod 102, can be raised and lowered by means of o t h e r rockshafts 109, spur-wheels 108, and annularlygrooved sleeves 1070, Figs. 11 and 12, splined on vertical shafts 106. Alongside the machine is a bar 122, Fig. 16, with longitudinally and vertically adjustable fingers 123 arranged so as to engage fingers 118 on particular shafts 106 and at particular times, the shaft 106 rotated causing the cam 116 of the sleeve 1070 to rise upon a roller 117, thus lifting the sleeve 1070 and the corresponding head 104, Fig. 10, so that at the next reciprocation of the rod 102 the corresponding clutch 61, Fig. 4, will be thrown into gear, and the one previously in gear thrown out as described hereafter. Alongside the machine is a longitudinally movable bar 131, Figs. 11, 12, and 13, carrying pairs of arms 132, 133 and pivoted pawls 141. The sleeves 1070 have pairs of arms 134, 135 provided with short and long projections to engage flanges 138 on the arms 132, and the ends of the arms 133. On a shaft 106, say that at the lefthand end of Fig. 11, being rotated to put the corresponding clutch 61 into gear, the corresponding sleeve 1070 and arms are raised, the bar 131 is drawn at first to the left. by the arm 134 and flange 138, and the middle pawl 141 engages the stud 139 on the middle raised sleeve 1070 and rotates the same which falls and disengages the previously engaged clutch. When the arm 134 is clear of the flange 138, the arm 135 moves the bar 131 back to the right. Shafts 106<d>, 106<e>, Fig. 4, not connected with any clutches 61, are provided for arresting the motion of the work-carrier at the ends of its travel. When any sleeve 1070 is rotated, and consequently raised, a nose 145, Fig. 12, is raised and rotates a shaft 147 and, by means of gearing 148, 149, the rod 102. A finger 151, Fig. 4, on the rod can then be engaged by a cam on the wheel 11 and is moved to the right to disengage a clutch 61, and, by means of the bellcrank lever 1560, the finger 146 clear of the nose 145. A projection on the wheel 11 then rotates the rod 102 so that a second finger can be engaged by a second cam on the wheel 11, and the rod is moved back to the left and another clutch 61 thus thrown into gear. The work-carrier may be moved also by a clutch 61<c>, friction gearing 79, 80, and gearing 83, 82, the friction roll 79, Fig. 23, being moved across the friction disk 80, to vary the speed and the direction of rotation, by means of a screw 86, a toothed nut 87, clutch reversing- mechanism 89, 90 and gearing 92, 93. The plate 231, Fig. 2, is raised and lowered by screws shown above the clutches 61 in Fig. 4, gearing, and reversing-mecbanism. The reversing mechanisms are controlled by levers 97, and the motions of the roll 79 and the plate 231 are limited by projections such as 98 which engage arms on rock-shafts connected with the clutch mechanisms. The punches which are to operate during any descent of the cross-beam 5 are backed up by gags 18, Fig. 17, connected to arms on rock-shafts 155 mounted in the main frame, the shafts 155, Fig. 16. carrying splined sleeves 157 which can be clutched to sleeves 158 by means of levers 165 and patterncams 167, the sleeves 158 being half rocked by gearing from the shaft 10 at each revolution of the latter. When the punches are arranged in three sets, the gags of three testing-punches 179 are connected with the three shafts 155, so that the setting of the machine may be tested on 'a piece of wood 185, the position of the work-carrier at each descent of the punches being shown by the pointer 193 and the scale 194. To avoid the necessity of re-adjusting the pattern-cams 167 and the fingers 123 when work of a different pattern is to be operated on, four pattern-cams 167 mounted on a shaft 168, and four finger bars 122 are provided, the cam or finger bar required being turned uppermost or moved into the position indicated in dotted lines, by means of eccentrics 200.