The disclosure relates to a flexible automatic clamping device and method for backside laser penetration welding of a T-shaped structure. The flexible automatic clamping device includes a clamping system, a ranging system and a control system. The ranging system outputs a position instruction to the control system, the control system outputs a movement instruction to the clamping system, so as to adjust the clamping system to an optimal position, then a stringer pressing plate fastens a stringer by means of a Y-shaped connecting rod, and a skin pressing plate fastens skin by means of a skin connecting rod. Based on the flexible automatic clamping device, the method includes prewelding clamping, backside laser penetration welding and postwelding shape retention. The disclosure implements accurate positioning, automatic clamping, backside laser penetration welding and postwelding shape retention of a T-shaped skin-stringer structure.

A cracked gas cooling heat exchanger includes a tube connection between an uncooled tube (1) and a cooled tube (2), having a cooled inner tube (3) enclosed by a jacket tube (4), with a tube intermediate space (5) for flowing cooling medium. A gas inlet header (11) has a GI tube inner part (12) and a GI tube outer part (13) and a cooling space (14) with an insulating layer (15). The GI tube outer part connects via a water chamber (6) to the jacket tube. The GI tube inner part faces the inner tube and is connected on a face (8) of the water chamber. A weld backing ring (16), between an end face (9) of the cooling space and a bottom face (8) of the water chamber, is in the insulating layer of the cooling space, arranged in a turn-out/groove (17) in the insulating layer.

A welding fixture and a locking method are provided. The welding fixture includes a base and workpiece positioning dies; a top pressing plate slidably connected to the base in a pressing lifting direction is configured to press top surfaces of workpieces placed on the workpiece positioning dies; welding avoidance grooves are disposed on the top pressing plate, and each of the welding avoidance grooves is located above a corresponding one of the workpiece positioning dies; and a side-pressing mechanism disposed on the base is configured to perform and cancel lateral pressing of the workpieces. The welding fixture has advantages: the side-pressing mechanism can achieve tight pressing of sides of multiple workpieces at the same time, and the side-pressing mechanism can also cancel the tight pressing of the sides of the multiple workpieces after welding at the same time, which can greatly improve clamping efficiency and efficiency of unloading the workpieces.

An apparatus for manufacturing a heat exchanger for a vehicle has a plurality of cooling panels bonded to each other by pressing a cooling panel module where the plurality of cooling panels are stacked vertically, including: a fixing portion for supporting top and bottom ends of the cooling panel module; and a pair of elastic portions that are provided between the top or bottom end of the cooling panel module and the fixing portion, and are arranged symmetrically based on a top or bottom surface of the cooling panel module to compress the cooling panel module.

A collar flange assembly welding fixture is disclosed, including a stand, a circular mount structure, and a support assembly which are configured to provide access to a front side and a back side of a collar flange assembly held by the support assembly. The stand has a plurality of circumferential bearings equidistant from an axis of rotation, the circular mount structure is rotatably supported by the circumferential bearings, and the support assembly is configured for mounting on the circular mount structure.

A plasma cutting system includes a power supply that outputs first and second plasma cutting currents. A torch is connected to the power supply and includes a first cathode that receives the first plasma cutting current, a first electrode and swirl ring, a second cathode that receives the second plasma cutting current, and a second electrode and swirl ring. The torch simultaneously generates a first and second plasma arcs from the electrodes. A gas controller is configured to separately control a flow of a first plasma gas to the first swirl ring and a flow of a second plasma gas flow to the second swirl ring. A torch actuator moves the torch during cutting, and includes a motor having a hollow shaft rotor for rotating the torch during cutting. A motion controller is operatively connected to the torch actuator to control movements of the torch during cutting.

A Mobile Electric Flash-Butt (EFB) Welding apparatus that incorporates an automated geometry system which creates field/mobile EFB welds with proper vertical alignment, within a definable distance. The system has a first pair of adjustable reference points on a left side of a mobile welding apparatus. The system has a second pair of adjustable reference points on the right side of the welding apparatus. The system has a first lifting mechanism positioned between the first pair of adjustable reference points and a second lifting mechanism positioned between the second pair of adjustable reference points. The welding line is positioned between the first and second pair of adjustable reference points and is the location of the weld. The system allows for comparatively shorter inserts than previously utilized.

A laser cutting apparatus includes a lower jig configured to support a lower portion of a first side of a cutting region of an object to be cut by a laser beam, an upper jig configured to support an upper portion of the first side of the cutting region of the object, a laser nozzle configured to emit the laser beam towards the cutting region of the object, and a spatter block jig locatable between a body part of the object and the cutting region of the object.

A laser cutting apparatus includes a lower jig configured to support a lower portion of a first side of a cutting region of an object to be cut by a laser beam, an upper jig configured to support an upper portion of the first side of the cutting region of the object, a laser nozzle configured to emit the laser beam towards the cutting region of the object, and a spatter block jig locatable between a body part of the object and the cutting region of the object.

A system for assembling vehicle body components includes an index table rotatably installed on a mounting frame, assembly units disposed on an upper surface of the index table in four directions by rotary plates, and each including a replacement jig and a fixing jig, the replacement jig and the fixing jig being configured to allow the first and second components to be loaded thereon, and the assembly units being configured to be rotated by a predetermined angle by the index table so that the first and second components are joined together by welding while passing through a plurality of assembly sections, a replacement jig palette positioned in a first assembly section, a component palette positioned in a second assembly section, a plurality of clamping units positioned in a third assembly section, and welders positioned in the third assembly section and the fourth assembly section.