Abstract:
A track bushing for an endless track of a track-type vehicle includes a cylindrical tubular shape, a first end and a second end, and first end and second bearing surfaces adjacent respective ends. A circumferential groove having a depth in an axial direction is formed in at least one of the first end and second end bearing surfaces. An abrasion resistant material is deposited within the circumferential groove and bonded to the bushing at a bond interface. The abrasion resistant material at the bond interface is diluted with no greater than 5% by weight track bushing material.
Abstract:
A method and apparatus for automatically welding and handling welded tailored blank composites. The method comprises the steps of transferring first and second sheet component parts from respective input stacks to an assembly table of a welding machine. The sheet components are disposed in a butt joint or an overlapping lap joint configuration and the blanks are welded together along a weld seam thus defining a welded blank. The welded blank is conveyed in a timed step manner from the welding machine to an output stacking machine via a magnetic stepping conveyor and the blank is transferred from the conveyor to an output stack of completed blanks with a stacking machine. An apparatus is provided to carry out the method.
Abstract:
Oxygen is mixed with another gas to form an auxiliary gas that will permit a welding of zinc-plated steel sheets (3a and 3b) without producing blowholes. An oxygen (O.sub.2) gas cylinder (4a) is provided in addition to an argon (Ar) gas cylinder (4b), for forming the mixed auxiliary gas, and the argon gas and the oxygen gas are mixed in a mixer (6) before being supplied to a machining head (7) and jetted onto a machining spot (9) through a nozzle (8). The oxygen oxidizes the zinc of the zinc-plated steel sheets (3a and 3b) to produce zinc oxide and zinc peroxide, to thereby prevent evaporation and minimize spatters, and thus permits a laser welding with a minimum generation of blowholes.
Abstract:
A touch-up welding apparatus for welding such portions of a motorcar body which remain unwelded after the body has passed along a main welding portion of an assembly line. Plural welding gun magazines holding differing welding guns are disposed along side of a welding station into which the motorcar body is positioned. A framework surrounds the welding station and supports the main body of a welding robot which is movable laterally and longitudinally of the station. A turnable, swingable wrist portion is provided on a lower end of an upwardly and downwardly movable robot arm attached to the robot main body. The differing welding guns may be selectively attached to the wrist portion and moved about the motorcar body as desired to weld the remaining unwelded portions thereof.
Abstract:
An articulated joint of changing the direction of a light beam passing through the joint has an inlet for the incoming light beam, an outlet for the outgoing light beam, two turning mirrors and three precision bearing units associated with the turning mirrors for permitting rotation of the mirrors with a minimum amount of error of angular displacement of the redirected beam. An apparatus providing movement of at least a portion of a beam delivery system and directing an outlet beam to a desired location includes the articulated joint, a motion delivery device operatively associated with the joint and connecting means disposed between the joint and the motion delivery device. The connecting means are adapted to provide relative motion between an attachment of the connecting means to the joint and an attachment of the connecting means to the motion delivery device. The precision bearings are associated with the turning mirrors and the outlet so as to decouple the articulated joint from the axis of the actuator mechanism, such as, for example, a robot arm. The precision bearing units incorporate two tapered roller bearings opposed to each other. Each tapered roller bearing has an inner race and an outer race. A preload arrangement preloads the bearings by exerting a force on the inner races which tends to squeeze the inner races together and by exerting a force on the outer races which tends to push the inner races apart.
Abstract:
A multi-point laser welding installation for vehicle bodies includes apparatus for positioning the pieces to be welded, apparatus for gripping the pieces and apparatus for welding the positioned and gripped pieces at specific points. The apparatus for positioning and gripping are provided with bearing surfaces. The shape of these surfaces conforms to the shape of the pieces. The apparatus for positioning and gripping include cavity which open the pieces at right angles. The welding apparatus is fixed on the positioning and/or gripping apparatus in order to ensure spot welding of the pieces at right angles to the cavities.
Abstract:
A contour cut door beam for automobiles, and apparatus and method of forming same. A steel tube is contour cut with a laser beam from a source offset from an operative axis coincident with the tube axis, using simultaneous rotational and linear advancement between the tube and cutting beam to form an arcuate outer end terminus on the tube in a plane transverse to the axis, an arcuate inner terminus on the opposite side of the tube in a second plane transverse to the axis, and a pair of mirror image contoured edges joining said termini, with all portions being on radii relative to said axis.
Abstract:
A method and apparatus for welding studs to a workpiece are provided. When the studs are welded to workpieces using a drawn-arc, stud welding technique, sometimes a coating of smut is deposited on the workpiece around the welded end of the stud. This coating detracts from the appearance of the stud and workpiece. Further, if the workpiece is to be covered with a coating material, the coating of smut must first be removed, resulting in an extra operation. It has been found that the coating of smut will not be deposited if, during the stud welding cycle, gas is directed toward the weld area in a swirling manner around the end of stud where the weld occurs.
Abstract:
Wheel for vehicles having a rim element and a wheel disk, the rim being of asymmetrical construction with one narrower and one broader side relative to a dropped base, the broader side having a substantially cylindrical portion, the rim element having flanges bent toward the axis of the wheel; the wheel disk having a peripheral portion of cylindrical configuration that extends axially and matches said cylindrical portion in fitting configuration and being welded thereto.