Patent GB-385245-A (GB)
Title: Improvements in or relating to machines for manufacturing wire nails
IPC: B21G3/20
Filed: 1932-08-18
Abstract: 385,245. Forging nails. WIKSCHTRÍM, J., 14, Tiergartenstrasse, D³sseldorf, Germany. Aug. 18, 1932, No. 23223. Convention date, Sept. 15, 1931. [Class 83 (iv).] Forging-machines; dies.-A wire nail making machine has one of the jaws 13, Fig. 10, for clamping the wire whilst the head is upset and one of the point cutting blades 14 disposed on a lever 11 mounted flat on the machine table and working on a pivot 12, the other cramping jaw 17 and the other cutting blade 18 being mounted on a fixed block 15. The wire 4 is drawn up vertically from a coil 5 under the machine by a feed device and after being gripped by the jaws during the upsetting of the head is moved in a transverse direction between the cutting blades, the severed nail being then ejected by a rocking ejector 94, Fig. 7. The heading plunger 63 is adjustably mounted in a lever arm 58, Fig. 2, moving up and down and also transversely to bring two operative portions of the plunger over the wire end for upsetting in two stages. Lever 11 is actuated bv cams on the main shaft 10 and a three-armed lever 41, 42, 43, Fig. 9, the latter arm recessed at 46 to receive the round end of a rod 47 engaging the lever 11, return movement of which is effected bv a laminated spring 50 and link 49. The clamping jaws 13, 17 are secured in adjustable position in lever 11 and block 15 by curved members 22, Fig. 12, rocking on projections 20; the ends 21 of members 22 engage studs 24 projecting through the jaws into grooves in the members 11, 15, adjustment being first made by packing 26 behind jaw 13 and by a screw 26 and the members 22 then secured by set screws 25. The cutting blades 14, 18 are mounted and adjusted similarly. The wire feed device comprises a curved jaw 129, Fig. 2, on a lever 127 rocked by a thrust rod 136 actuated by a rocking arm and cam on the shaft 10 and returned by plate spring 140 and link 141, the wire 4 being pressed against jaw 129 during the feeding movement by a roller 116 on a two-armed lever 114, 115, the latter arm engaged by a plate spring 119 and by a thrust rod 118 operated by an arm on shaft 40 and cam on shaft 10. The wire is guided to the clamping jaws 13, 17 through a guide member 99 on the end of a leaf spring 98 carried by a shaft 97 disposed below the table 2, which guide member 99 engages a stop screw 109, Figs. 10 and 12, on lever 11 to locate the wire accurately between the centres of the clamping jaws. After the heading operation the shaft 97 is rocked to move the leaf spring 98 and wire guide 99 into position to locate the headed wire between the cutting blades 14, 18, guide member 99 then engaging a second stop screw 110. Shaft 97 is rocked as shown in Fig. 3 by means of a lever 100, 101, thrust rod 106 operated by arm 102 and cam on shaft 10 and return plate spring 108. The lever arm 58, Fig. 2, carrying heading plunger 63 is mounted on and reciprocated vertically by an arm 53 of a lever 51, 52 mounted on shaft 40 and actuated by cams on shaft 10 ; lever arm 58 is also connected by link rod 71 hooked round end of plate spring 72 and by thrust rod 70 to an arm 80 on a shaft 79 which is rocked as shown in Fig. 7 by arm 81, rod 83 and screw 88 threaded in an arm 85 of lever 84 rocked by a cam on shaft 10 to give the lever arm 58 a transverse movement for the second stage of the upsetting by header 63'. The same lever 84 carries a fork 86 operating a block 93 pivoted at 92 to an arm of the rocking ejector 94.