GB864333A - Improvements in work-feeds for shearing and nibbling machines - Google Patents

Abstract

864,333. Strip-feeds. TRUMPF, C. Dec. 4, 1958 [Feb. 1, 1958], No. 39077/58. Class 83 (4). In a nibbling-machine having a reciprocatable tool 12, the work 17 is fed automatically only during return movements of the tool. The work is supported on a roll 32 and fed by contact with the curved or toothed periphery of an element 31 pivoted at 39 on a horizontal feed-slide 29; alternatively, the element 31 may consist of an eccentrically-mounted disc or a pawl. The slide 29, in ways 22 in a housing 18, is connected by a link 27 to a vertical slide 23 in the housing, which is keyed at 20 to an arm 16 adjustable angularly about a guide-sleeve 11 for the tool ram 10 to vary the direction of feed. An arm 33 carrying roll 32 is also adjustable about the axis of the shear blades 12, 35. A pin 24 in slide 23 is pressed into a groove 14 in an adjustable collar 13 on the ram 10 by a spring 36, and is withdrawn from the groove by a projection 37 on link 27, if the ram is raised beyond a certain level. The radius of the upper part 15 of collar 13 is greater than that of the lower part, so that on its down-stroke, part 15 engages the pin 24. During its return strokes, element 31 slides over the work. The element may be raised by a lever 311 and retained in the raised position as by a ball-catch 29<SP>1</SP> engaging the element or its pivot-pin 39 if this is fixed to the element. Adjustment of the length of the feed-stroke can be effected by adjusting collar 13 on the ram 10, or by using an adjustable link 27. Instead of the pin 24, a two-armed lever may be pivoted on the housing 18 and connected between slide 29 and the collar 13 or ram 10. Alternatively, a gear meshing with teeth on the ram or collar and on the vertical slide may be used for the feed. In Fig. 3, a toothed band or teeth 40 are fixed to member 31 by plates 44 secured by a dowel and screws 45.