Patent GB-971474-A (GB)
Title: Profiling machine
IPC: B23Q35/10
Filed: 1962-02-07
Abstract: 971,474. Grinding; machine tool details; electro erosion. A.G. FUR INDUSTRIELLE ELEKTRONIK AGIE LOSONE BEI LOCARNO. Feb. 7, 1962 [Feb. 18, 1961], No. 4674/62. Headings B3D, B3K, B3L and B3V. A machine for making a profile on a workpiece 1 according to the profile of a former 49 comprises means 2 for mounting the former and workpiece so as to be rotatable about a common axis, means for moving a tool 13, such as a grinding-wheel, planing or milling cutter, or electro-erosive tool, to-and-fro along the axis and means for moving the tool radially in an axial plane of the axis through the control of a tracer 48, the former being larger than the workpiece and the reduction in scale of the profile being controlled by a sine bar 58 movable under the control of the tracer to raise and lower a link 63 carrying a way member 10 along which a carrier 9 for the tool is movable; the link is of adjustable length to determine the radial position of the generatrix to be machined on the workpiece. The inclination of the way member is adjustable by a screw 12 to produce parallel or tapered work and the tool 13, which, as described, is a grinding-wheel, is supported by a shaft 4 connected by freely-pivoted levers 6, 5 to a fixed pivot 8. A pivot 7 between the levers is connected by a strut 19 of adjustable length to a lever 18 also pivoted to the shaft 8. A roller 15 is adjustable along the length of the lever 18 and co-operates with a cam 14 driven by a motor 31 or hand wheel 30 to rock the levers 5 and slide the carrier 9 along the way member 10 whereby the grinding-wheel is reciprocated along the axis of the workpiece, the length of the stroke being determined by the position of the roller along the lever 18. The shaft 23 also carries a cam 32 having notches 34, 35 which are engaged by a follower 36 on a lever 37, a second lever 39, when the follower engages the notches, moving the tracer 48 out of engagement with the former while a third lever 38 operates a pawl-and-ratchet mechanism 43, 44 connected to a worm-andwheel assembly 45, 46 to rotate the shaft 2 carrying the former and workpiece step-by-step at each end of the stroke of the grinding-wheel. One of the notches may be covered by a quadrant 33 so that the former and workpiece are only moved at the end of each complete to- and-fro movement. As the follower is disengaged from the notch, the tracer 48 reengages the former and, by way of a lever 55, positions a slide 57 carrying the sine bar 58 which is engaged by a follower 61 on the link 63 carrying the support 64 for the way member 10 so that the grinding-wheel is positioned radially of the shaft 4 for its next stroke. The support is guided by rods 66, 67 engaging bores in the machine frame and the length of the link and the inclination of the sine bar are adjustable to determine the scale and radial position of the profile ground on the workpiece. A control disc 71 has cams 72, 73 which operate a switch 74 to stop or control the machine at the end of a grinding operation. The way member may have a shape other than flat to form other than tapered or parallel workpieces. Complicated profiles may be produced on the workpiece by mounting the workpiece and former for rotation first about one axis and then about a second axis parallel to the first.