Multiple curvature bender
AssigneeEaton-Leonard Corporation
InventorZeno P. Traub
Life of this patent
Estimating the term…
Abstract
A rotary draw bending machine employs a stack of bending dies 22 of different curvatures, forming part of a bend head 18 that is entirely mounted on the forward end of the machine bed 10 for bi-directional lateral and vertical motion so that without changing the position of the centerline of the pipe 16 to be bent, it may be formed by bend dies of different curvature. The entire bend head 18 is shiftable laterally to enable the bend dies to clear the pipe 16 as the dies move vertically to position another die. A single pressure die 20, which is mounted on the movable bend head 18, is mounted for vertical movement relative to the bend head so that it can be positioned in alignment with the pipe.
Claims12
Bending apparatus comprising
- an elongated machine bed,
- a carriage mounted for motion on the machine bed in a direction toward and away from a forward end of said bed,
- a pipe holding chuck mounted on the carriage for holding a pipe with its axis aligned in said direction,
- a bending head carried by the forward end of said machine bed and including first and second bend dies for bending a pipe about a bend axis,
- means for mounting said bending head on said machine bed for reciprocal motion in a second direction parallel to said bend axis and in a third direction transverse to said bend axis and to said first direction, and
- said bending head comprising a stationary arm assembly, and said means for mounting said bending head comprising a slide block slidably mounted on a forward end of said machine bed for motion in one of said second and third directions, means for mounting said stationary arm assembly to said slide block for slidable motion in the other of said second and third directions, a swinging bend arm assembly mounted on said stationary arm assembly for rotation about said bend axis, said bend dies being mounted on said swinging bend arm assembly, whereby the bend dies move together with both said stationary and swinging bend arm assemblies in said second and third directions, and clamp die means carried by said swinging bend arm assembly for motion toward and away from said bend dies.
Bending apparatus comprising
- an elongated machine bed,
- a carriage mounted for motion on the machine bed toward and away from a forward end of the bed,
- a pipe holding chuck mounted on the carriage, said carriage being mounted for motion in a first direction parallel to the longitudinal extent of a pipe held in said chuck, and
- a bending head mounted on a forward end of said machine bed for bi-directional motion in each of second and third directions that are each transverse to one another and to said first direction, said bending head comprising
- a slide block slidably mounted to a forward portion of said machine bed for bi-directional motion in one of said second and third directions,
- a stationary arm assembly slidably mounted to said slide block for bi-directional motion in the other of said second and third directions,
- a swinging bend arm assembly mounted to said stationary arm assembly for rotation about a bend axis extending in one of said second and third directions,
- first and second bend dies of mutually different form mounted on said swinging bend arm assembly for rotation therewith,
- clamp die means mounted on said swinging bend arm assembly for cooperating with said bend dies to clamp a pipe, and
- pressure die means carried on said stationary arm assembly for restraining a pipe being bent around said bend dies.
Dependencies are inferred from the claim text.