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US 4,116,039 AGranted
Drop hammer frame weldment and assembly
AssigneeAMCA International Corporation
InventorJoseph A. Geuss
Life of this patent
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AssigneeAMCA International Corporation
InventorJoseph A. Geuss
Estimating the term…
An improved upright frame element for fluid operated drop hammers which are fabricated from low carbon steel plates, slabs and forgings welded together and forming a massive, integrated weldment of multiple boxlike fabrications having strong horizontal internal and external reinforcing structures welded to the essential upstanding parts of the frame and lending strength against the several forces and components in torsion, bending, shear and against vibration to which drop hammer frames are subjected violently in normal use. All the upstanding end members and side plates are welded to and integrated with a firm horizontal base member at their lower ends and to and with a heavy horizontal top member at their upper ends. The base and top members close the uppermost and lowermost of the several boxlike fabrications with the nearest of the several horizontal reinforcing structures mentioned above. When a pair of my improved frame elements are juxtaposed in the whole frame of a drop hammer, they coact to protect each other and preserve themselves advantageously.
A drop hammer frame element comprising in combination an upright front member carrying the gib for guiding the ram, an upwardly extending back member spaced rearwardly from the front member, upwardly extending near and far side plates normal to said members and widely spaced from each other and engaging and spacing said front and back members and welded thereto, a base plate upon which the lower ends of said members and said side plates are supported and to which they are welded, a top plate supported by and welded to the upper ends of said members and side plates, all said plates and members forming an internally unreinforced frame element, rectangular horizontal internal reinforcing structures having vertical peripheral edges closely fitting substantially the whole interior perimeters of said element adjacent the said edges of said structures and welded to said side plates and members throughout substantially the whole peripheries of said structures at spaced elevations in said element between the lower and upper ends thereof, said reinforcing structures with said base and top plates, side plates and members making a plurality of six-sided box-like fabrications comprising a whole reinforced frame element, bolts adjacent and aligned horizontally with certain of said structures and connected operatively to said front and back members, and means for stressing said bolts in tension and prestressing said reinforcing structures in compression between said members.
The method of making a drop hammer frame weldment which, as used, in a drop hammer stands upright and has an upstanding back member disposed rearwardly in said frame, a vertically disposed relatively massive front member (compared with the upstanding back member and side plates) which carries the gib for the ram of the hammer on its front face, and upstanding side plates disposed between said members, comprising providing an internal reinforcing slab having front and rear ends and having a relatively massive mid-portion (compared with said side plates) extending between said ends, disposing said massive mid-portion in about the median vertical plane of said weldment, as used, and normal to said front member and spaced rearwardly of the gib part of said frame, welding said front end of said slab to the back of said front member, welding said side plates to the back of said front member, welding the sides of said slab to said side plates, welding said back member to said side plates, welding said rear end of said slab to said back member and making a functionally monolithic reinforcement throughout the whole cross section of said frame weldment adjacent the gib part thereof.
The method of making a drop hammer frame element of metal constituents welded together, which frame has a massive head and base and a massive front member which normally stands vertically and has a smooth back side and a gib pocket in its front side, and has relatively thinner far and near side plates and a back member which rise and converge upwardly in the finished element and, with the front member, join said head and base, said massive parts being between about four to six times thicker than said side plates, and has reinforcing parts lying parallel with said head and base and extend horizontally in normal use and join said side plates and said front and back members to comprise a multiple box-like structure giving strength to said frame, comprising the steps of making weldments of at least certain of said reinforcing parts each with a hollow sleeve in the middle and plate parts welded to the sides of the sleeve, laying said front member prone in its front side, erecting said reinforcing weldments on the back side of said member and normal thereto in planes that will be horizontal when said member is vertical and with the axes of said sleeves lying in the median plane of said member, welding said weldments, so placed to the back side of said member, placing said far and near side plates on the back side of said member and normal thereto and contacting the opposite side edges of said reinforcing weldments, welding said side plates to said member and to said reinforcing weldments and making at least one five sided box opening rearwardly between said reinforcing weldments, placing said back member of the frame upon the exposed upwardly facing edges of said side plates and upon the upwardly facing edges of said plate parts which were welded to the sides of said sleeves with the rearward ends of said sleeves protruding through holes provided in the said back end member, and welding said back member to the protruding ends of said sleeves.
Dependencies are inferred from the claim text.