GB725841A - Machine for contouring and bevelling workpieces of wood, metal or other materials - Google Patents

Abstract

725,841. Sawing. SAUNDERSROE (ANGLESEY), Ltd., and LEECH, L. March 8, 1954 [March 10, 1953], No. 6600/53. Class 145. A machine for shaping bevelled and curved workpieces of wood, metal or other material, particularly the ribs of wooden boats, comprises a table 10, on which is supported a workpiece 11 fitted with a template 12 on its upper surface and a template 13 on its lower surface, a feeler 25 co-operating with the upper template to control the tilting of a saw 14 in order to determine the amount of bevel along the workpiece, a pneumatically or hydraulically-operated jack 31 bearing on the lower template and holding the workpiece and template assembly in engagement with a fixed guide pin 30 and a movable guide pin 34, and feeler means 36 co-operating with the lower template to control the position of the guide pin 34 so that as the workpiece is fed past the saw by hand or power means, it is cut according to the profile determined by the lower template. As described, a band saw 14 carried by a frame 17 is pivoted about the point of intersection 18 of the saw and table by a rack 20, the rack being connected to a hydraulic jack 23 controlled by the feeler 25 through a valve 24 and follow-up link 26. The feeler 36 is a lever pivoted at 37 on a spring-loaded slide 38 and has two arms 35 that bear on the workpiece on either side of the fixed guide pin 30 so that, as the work is fed by rollers 40, 41 driven from a motor 44, the lever will tilt if the workpiece deviates from its proper course and will operate one or other of two switches 46, 47 to control a relay-operated valve and supply pressure fluid to one or other of a pair of hydraulic jacks 55, 56 connected by an oscillation damping unit 57. The jacks are connected to opposite ends of a bar 33 carrying the movable guide pin 34 and the pin is thus moved in the direction appropriate to correct the deviation of the workpiece. By reversing the workpiece, its other face can be shaped, the upper template again determining the bevel and the lower template determining the profile. In the modification shown in Fig. 7, the feeler 125 co-operating with the upper template has a slot 58 for the saw and is connected by rods 59 to a bar 61 for actuating a hydraulic control valve 124; the Y-shaped feeler 36 is replaced by a pair of sliding rods 135 which bear on a centrallypivoted lever actuating the switches 46, 47 through adjustable screws. The Provisional Specification also refers to a rotary cutter for shaping and bevelling wooden members.