GB767909A - Improvements relating to methods of securing together two parts in predetermined relative disposition - Google Patents

Abstract

767,909. Assembling punches and dies; bolting. OPEL AKT.-GES., A. March 23, 1955 [April 3, 1954], No. 8448/55. Classes 83 (2) and 83 (4). A method of securing two parts together in predetermined relative disposition comprises aligning the parts in said disposition applying adhesive cement, e.g. synthetic resin to contiguous portions of the parts, machining aligned holes in the two parts after hardening of the cement, securing the parts together by screws, bolts or the like and then removing the cement. In an embodiment, holes 17 for accommodating punches 18, 19, 20, 21 and 22 (Fig. 1) are first drilled in a bottom die 14 by means of templates and the die is positioned on the lower plate 10 of the press and secured by adhesive cement 26 spread around the outer edges of the die (Fig. 4). Holes for screws 15 and dowel pins 16 are then drilled through the die and plate. The punches 18 to 22 secured in punch plates 23 are inserted into the holes 17 and the upper die plate 11 is lowered on to the bottom plate, the guide bolts 12 fitting into sleeves 13. The assembly is then inverted and the punch plates which are correctly positioned on the upper plate 11 by the holes 17 are secured by adhesive cement 26. The plates are disassembled and holes for screws 24 and dowel pins 25 are drilled in the plate and punch plates. Finally, the screws and dowel pins are inserted and the cement is chipped away. The cutting blades 30 and 31 (Fig. 7) are secured in a similar manner, the top cutting blades 31 being fitted round the bottom cutting blades 30 after the latter have been secured by cement 26. The matrix 40 and die 41 (Fig. 8) are also secured in a similar way, the die 41 being fitted on top of the matrix after the latter has been secured by cement 26. Cotton is added to the cement to facilitate spreading.