Patent GB-583521-A (GB)
Title: Portable machine for drilling, turning, screw-cutting and spinning metal
IPC: B23B45/00
Filed: 1944-03-31
Abstract: 583,521. Combined drilling, screwing, turning, and spinning machines. POWELL, A. G. E. March 31, 1944, Nos. 5947, 5948, 5949 and 5950. [Classes 83 (iii) and 83 (iv)] A portable machine for drilling, screwcutting, trepanning plates, expanding tubes, corrugating and jointing tubes or forming rivet heads by spinning &c., comprises a headstock 1A and tailstock 1B on supporting members 1C, 1D arranged for relative adjustment, the headstock having a sleeve 5A screwed therein, this' sleeve having a wheel 5 secured to it and a spindle 6 rotatable therein by means of a handle 7 and carrying a tool 8 complementary to a tool 8A carried by the tailstock. Both headstock and tailstock may have screwed sleeves 4A, 5A and these may carry complementary tools 8H, Fig. 7, at their inner ends, a wheel 4 or 5 with an operating handle 7 being provided at each outer end. The members 1D, 1C may be guided relatively by bars 10A, Fig. 1, engaging grooves in the members 1D, 1C and secured in adjusted position by bolts. In a modification a tongue 27, Fig. 7, on one member 1C may engage a groove in the other instead of or in addition to a bar 10c which may pass through a central passage 11A in the members 1C, ID. The members 1C, 1D may be clamped together by a screw K fixed in the member 1D and a screwed socket L rotatable by means of its, knob O in the member 1C. The tailstock 1B, Fig. 1, may have a sleeve 4A screwed therein and this sleeve may have a wheel 4 and a collet 2 which receives the tool 8A. The tools 8, 8A are for spinning the ends of tubular rivets. The wheels 4, 5 have holes 4B, 5B to receive levers or handles 7, Fig. 7, by which they are turned to adjust the sleeves 4A, 5A axially. In a modification the wheel 5, Fig. 4, has projections for turning by hand. For expanding the end of a tube 30 the spindle 6 carries an adaptor 8D in which is mounted a conical tool 8B adapted to co-operate with a tool 8c carried by the tailstock. The adaptor 8D may also be used to carry cutters 8F, 8E for cutting circular grooves or cutting out circular discs. The sleeves 4A, 5A, Fig. 7, screw directly into the heads, but may screw into sleeves 3 as in Fig. 4 so that they can be changed for others of a different pitch and hand. They carry screwing dies 8H for acting on a workpiece 28 and distance rods 8K to limit the length of thread cut on the piece 28 which'is held by a hand grip, not shown. In another modification, a tube N, Fig. 8, is mounted in a hollow divided former M carried by the tailstock and has grooves spun therein by formers D1 pivoted on a ball C carried by the spindle 6 and expanded by screwing a hollow. conical nosepiece along a screwed part A of the spindle and rotating this by the handle, not shown, mounted on the splined end 6A. Any of the machines built up may be mounted on a box 9E, Fig. 13, by bolts through holes 9 in the members 1C, 1D or through unoccupied holes 26 in the connecting bars 10A, 10c. The bar 10C may be cranked for mounting a machine vertically, or to serve as a work stop as in Figs. 4 and 8. A number of machines may also be connected side by side by long bolts passing through the holes 9 and through spacing sleeves arranged between said machines.