GB414690A - An improved means for effecting ram-adjustment in presses - Google Patents

Abstract

414,690. Metalworking presses. HUMPHRIS, F., Park House, Park Road, Parkstone, Dorset. Dec. 7, 1932, No. 34618. [Class 83 (iv).] In a press &c. having a ram operated through a toggle linkage and adjustable by threaded elements associated with the bridge of the press, a threaded rod a supported in an aperture in a bridge piece d by an internally threaded collar b is clamped and locked in its adjusted position by a spring controlled device which as shown consists of a two part ring a<2> apertured near its periphery to receive screws a<4>, Fig. 9, which hold springs a<3> under compression against the collar b to prevent rotation thereof. A second ring a<2> engages the underside of the bridge d. The rod a may be rotatable in threads formed directly in the bridge d or in a bush therein or the bush may be rotatable and the rod be held against rotation. At its lower end, the rod a is either integral with or secured to a crosshead c guided in the press frame A by a bolt c<2> passing through the crosshead and slots in the frame and edge plates h, h<1> at the ends of the crosshead constitute the toggle linkage. For a wider ram, two or more threaded rods a, Fig. 5, are secured to a crosshead c and pass through rotatable bushes b to which they are clamped by a ring a<2> after adjustment. The bushes b are geared together for simultaneous movement and are supported by a grooved two part collar e provided with adjusting screws f<1> engaging a revolvable ring f on the bridge d.