摘要:
This multispotwelding machine serving for the production of grids or gratings has a welding electrode system (50, 51, 52) suitable for double spotwelding in the direction of the longitudinal members (L) and having two lines of weld (S1, S2), two crosswire feed lines (E1, E2) arranged in a fixed position at a distance apart (A), two crosswire transfer tools (4, 5) which are arranged on a common bearer (1), which can be shifted in the direction of the grid feed by a length of stroke (H) corresponding with the distance of the plane of symmetry (ME) of the feed lines from the plane of symmetry (MS) of the lines of weld (S1, S2) of the welding electrode system, as well as a grid feed mechanism (67). For enabling alteration of the crosswire pitches a mechanism (2, 3, 21, 23) is provided by which the crosswire transfer tools (4, 5) can, during the motion of the transfer tools, be adjusted on the common bearer (1) in opposite senses by equal amounts (x) in the direction of the longitudinal members (L), so that their lengths of stroke (H.+-.x) are altered in opposite senses with respect to the length of stroke (H) of the bearer (1).
摘要:
The invention relates to electrical multi-spot resistance welding machine for the production of welded bar gratings produced by welding cross-bars into the narrow side of parallel, upright flat bars. Such a machine has a pressure-beam which is guided vertically on a frame for lowering onto and raising away from the bars to be welded. Two rows of electrodes are disposed on the pressure beam, the rows being transverse to the feed path of the flat bars and the electrodes in the two rows being aligned in the feed direction of the flat bars and the electrodes of each aligned pair thus formed are connected to the secondary terminals of opposite polarity of a respective welding transformer. The electrodes are mounted in the pressure beam such that the electrodes of each pair aligned in the feed direction of the flat bars, are at least partially independently slidable vertically within the beam against a biasing force, the pressure beam and the welding transformers being mounted in a single unit for lowering and raising together. Short flexible supply leads connect the electrodes with the transformers.
摘要:
The invention relates to apparatus for and a method of moving a grid (G) longitudinally in stepwise fashion through a multi-spot welding machine by means of an element (5) arranged to engage a transverse rod (D) of the grid at a starting position, move the grid (G) forward through a number of steps at a first mean speed, and thereafter disengage from the rod (D) and return to the starting position at a mean speed greater than the first mean speed. The movement of the element (5) is controlled by a computer (31) so as to return to its starting position if the time required for its return from the position which it would occupy after the next step is greater than a preset maximum standstill time between steps.
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:
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:
A multi-spot resistance-welding machine for manufacturing welded grids consisting of a group of longitudinal wires and crosswires crossing the longitudinal wires at right-angles, to enable grids to be manufactured in which the length of at least some of the crosswires is smaller than the width of the grid and in which the relative position of these shorter crosswires can be selected with respect to the group of longitudinal wires, is equipped with two crosswire feed devices (16, 40) of which at least one, but preferably both, can be displaced and fixed in an allocated guide (15, 17; 51, 52) transversely to the feed path of the group (70) of longitudinal wires and relative to a delivery device (60) transferring the crosswires from the feed devices into the welding area.
摘要:
An apparatus for supplying cut-to-length longitudinal elements to the intake of a grid welding machine includes a revolving endless transverse conveyor 3 which receives the longitudinal elements 16 into open receptacles 9 and conveys them over the upper side, a turning location and a part of the lower side of the transverse conveyor 3 into the intake area of the welding machine, in which the receptacles 9 for the longitudinal elements 16 are arranged on the periphery of the transverse conveyor 3 in groups forming magazines 8a, 8b and 8c. The mutual distance A between these magazines being at least equal to the width B of the same. The longitudinal elements 16 from a magazine 8c arriving at the intake area of the welding machine, with the transverse conveyor 3 being briefly stopped, are released by a lowerable depositing device 4 previously holding the longitudinal elements in the relevant magazine, while the transverse conveyor 3 is again made to revolve so that an emptied magazine 8a can be filled with longitudinal elements and a magazine 8b already filled can pass into the intake area of the welding machine.
摘要:
A mechanism for bending a coplanar family of straight wires into zig-zags comprises deflector rollers for feeding the family of wires longitudinally in parallel with one another, bars adapted to be displaced transversely to the wires and carrying wire deflector pins, and a control device for moving the bars alternately in opposite directions transversely of the wires. In order to avoid sliding of the wires against the deflector pins during the bending operation, each bar is hinged to the one ends of at least two parallel bearer arms of equal length and pivotally supported about axes running perpendicular to the plane of bend. During each bending operation only one bar at a time can be displaced transversely by means of the control device to carry out a working stroke.
摘要:
A shearing machine for severing parallel longitudinal members of grids or gratings has a horizontal guide-beam (9) which is stationary during the cut and upon which are provided counterbutts (17) in the manner of comb teeth; and a cutter-beam (10) which is movable parallel to and alongside the guide-beam during the cut and upon which blades (18) are provided in the manner of comb teeth, the blades cooperating with the counterbutts on the guide-beam to shear longitudinal members extending through notches (19,20) formed between adjacent counterbutts of the guide-beam and between adjacent blades of the cutter-beam. The guide-beam and the cutter-beam are guided in a machine frame for vertical movement into and out of a working position in engagement with a grid or grating and are associated for common motion in the vertical direction. Opposite to each of the two end faces of the guide-beam a respective stop-face (13,14) is provided; and opposite to each of the two end faces of the cutter-beam is arranged a respective single-acting fluid pressure-operated cylinder (5,6) which is fixed to the machine frame and has a piston (3,4 ) with a piston rod (15,16) formed at its end a thrust face for the respective end face of the cutter-beam for imparting to the cutter-beam a stroke parallel to the guide-beam and away from that cylinder to which fluid pressure is applied at that time.