GB1433225A - Press adaptor apparatus for standardizing die use - Google Patents

Abstract

1433225 Stop-press mechanisms DAYTON PROGRESS CORP 8 May 1973 [8 May 1972 7 Dec 1972] 21929/73 Heading B3W To facilitate changing tools in a press including a slide and a bed, a tool plate unit is mounted on a base support, for connection to the slide on the bed, by slip fit means including portions which interact to limit relative movement of the unit and the support in at least two directions. As shown, the punch holder 27 of a plate unit carries a boss 35 so that it can be slid into a slot 24 in a plate 22 of the base support bolted to the press slide 11. Alternatively the slot may be in the punch holder 27 and the boss on the plate 22. The punch holder 27 so located is screwed to the plate 22 at 23, 29. A punch plate 34 is secured to the holder by screws and dowels. A bolster plate 13 (forming part of a base support 12 is bolted to the press bed 10 and has side shoulders 14, 15 which form a slideway for a platen 18 of a plate unit. The interacting portions comprise a spring-loaded ball 47 engaging in a recess (49), Fig. 6 not shown, in the platen to limit relative movement of the platen and bolster plate. They are then screwed together at 46. A die holder 26 is screwed to the platen at 21, 28 and a die plate 33 screwed to the holder. A stripper plate 30 is suspended, and spring urged away, from the punch plate 34 and guide posts 31 engage in bushes 32. A die set including holders 26, 27, Fig. 8, can be introduced into a press as a unit, cables being looped about handles 38 to form a sling, Fig. 7 (not shown). The die holder 26 may be mounted on skids (43), (44) until it is installed, Fig. 7. Once the die set is installed, a screw 40 at the upper end of each handle is released and the handles are pivoted so that the screws 40 can be engaged in holes 41. An alternative interacting locating portions comprise pins 75, Fig. 8, on the punch holder 27 which are engageable in notches 65, 73 in the plate 22<SP>1</SP>, Fig. 10. The notches are formed in discs 63, 71 which are orientated in holes 59, 61 in the plate 22<SP>1</SP> to align the mouths of the slots with straightsided channels 55, 57 in the plate 22<SP>1</SP>. The inner end of the notch 65 is a uniform arc 64 while the inner end 79 of the slot 73 is arcuate but not on a uniform radius and has a central flat 79. The pins 75 are slid into the notches, one pin seating and being centred in the arcuate portion 64 while the flat 79 accommodates the other pin regardless of slight inaccuracy in its position. The head of the latter pin (75<SP>1</SP>) may be irregularly shaped, Fig. 12 (not shown), so that rotation thereof adjusts the angular position of the die set about the pin engaging the notch 65. The pins and notches may be provided on the plate 22 and punch holder respectively.