摘要:
A multispot welding machine for producing a mesh web from arrays of wire running skew to the longitudinal direction of the web and crossing one another has two endless circulating feeders which carry deflector-pins and each of which has a working run defining a different one of the edges of the mesh web to be produced, a wire-layer which is movable to and fro across the feeders and arranged to lay a number of wires alternately about a corresponding number of deflector-pins on the working runs of the two feeders, and a welding zone having means for welding the wires together at their crossover points. The endless feeders circulate in a common plane which is parallel with the plane of production of the web, the deflector-pins project substantially perpendicularly from the common plane, and the working runs of the two feeders have in the neighbourhood of the welding zone a greater separation from one another than before and beyond the zone.
摘要:
A multispot welding machine for producing a mesh web from arrays of wire running skew to the longitudinal direction of the web and crossing one another has two endless synchronously circulating feeders which carry deflector-pins and each of which has a straight working run; the runs are uniformly spaced from one another and each defining a different one of the edges of the mesh web to be produced, a wire-layer which is movable to and fro across the feeders and arranged to lay perpendicular to the runs a number of wires alternately about a corresponding number of deflector-pins on the working runs of the two feeders, and a welding zone having means for welding the wires together at their crossover points. The wire-layer has an auxiliary drive mechanism which is capable of imparting to the wire-layer, each time after the wire-layer crosses over the working run of a feeder, an additional rapid forwards motion in a direction parallel to the working runs and subsequent backwards motion so as to form loops of the wire around the deflector-pins.
摘要:
A bending mechanism for wire or strip material is provided, which is intended in particular for bending back towards the edge longitudinal wires the projecting end portions of crosswires of reinforcement grids for reinforced concrete construction. The mechanism comprises a substantially circular-sectioned cylindrical bending form, and a bending-tool eccentrically mounted on a rotatable tool carrier which can be rotated in either direction about the axis of the bending-form. The bending-form is shiftable along said axis between a working position, in which the end faces of said tool carrier and said bending-form are substantially touching, and a rest position in which said two end faces define between them a gap for the passage of a wire which is to be bent, in particular a crosswire of a reinforcement grid.
摘要:
The disclosure relates to the production by means of an electrical resistance welding method, of grids formed from metal wires crossing over another. The grid wires are carried through between rows of cooperating electrodes and, under pressure, are welded together at the cross points of the wires by an electric current. Each cross point of the wires and the surfaces of the associated electrodes of the grid welding machine, which lie in the welding region, are subjected to the action of a liquid coolant to increase the life of the electrodes and reduce distortion of the grid due to the localized heating of the wires.
摘要:
A lattice girder making machine has a stepwise feed mechanism for upper and lower chord wires; and a continuously operating bending mechanism for bending wire into zigzag strutting which is welded to the chord wires at a welding station. Between the bending mechanism ad the welding station the zigzag strutting slides along guides which allow the strutting alternately to contract resiliently and then to expand to accommodate the stepwise advance through the welding station. At the welding station the strutting is held at the required extension by fingers.
摘要:
The invention relates to an automatic control device for a bending machine for use in the production of loops of bar or wire material for concrete reinforcement. The device includes a preselector for preselecting the type of loop required and determines the sense of direction and amount of bending required in that loop-type. Additionally, a selector is provided for selecting the length of each side of the loop of the type selected by the loop-type preselector.
摘要:
The invention concerns an apparatus for detaching wires previously cut to length from a disordered bundle. The apparatus includes a container for the bundle of wire in which there is mounted, adjacent one end, a device for grasping the wires in turn adjacent their ends and moving them transversely to their longitudinal axis against a stop situated to the side of the draw-in region of two conveyor rollers which have a variable spacing between their axes. The rollers are arranged, on reducing their axial spacing, to grasp the end of each wire bearing against the stop and to pull that wire out of the bundle substantially in its axial direction to convey it to a receiving device.
摘要:
The invention is concerned with a multipoint mesh welding machine having a row of electrode holders on one side of the working plane of the mesh. The electrode holders are selectively electrically connectable to one of a number of busbars extending across the machine by individual adjustable switching members.
摘要:
The transmission comprises two pairs of aligned coaxial shafts (3,5,12,13) capable of being moved by way of a control relative to each other in an axial direction and having associated therewith at their respective facing ends or sides in each case a clutch disk (37,38,39,40). The shafts can be coupled in various combinations by way of a clutch body (2) disposed so as to be freely shiftable and rotatable between the two pairs of clutch disks.In order to dispose the motor and the elements driven by it on the same side of the transmission, the first pair of coaxial shafts is formed from an extension (3) of the drive shaft (1) extending beyond the clutch element or body (2) and from a hollow shaft (5) concentrically surrounding this extension (3) and connected to it under a fixed transmission ratio. The second pair of coaxial shafts is formed from two shafts (12,13) disposed in front of the clutch body (2) and surrounding coaxially the drive shaft (1), where each of these shafts (12,13) is connected in each case at definite predetermined transmission ratios via a gear wheel (14,15) with a gear wheel (16,17) which in turn is coupled to or is capable of being coupled to the driven shaft (18).
摘要:
A double point welding machine has active electrodes (3,4) and passive counter-electrodes (8,9) for simultaneously welding rods (5,6) together. In order to ensure that the welding pressure is uniform at both welding points, the counter-electrodes (8,9) are mounted on a current bridge (7) carried by a pressure beam (15). The pressure beam forms part of a four bar pivotal linkage the other arms of which are formed by rams (26,27) and a second beam (24) which is pivoted at a pivot (25).