Abstract:
The subject of invention is the method of manufacturing fire resistant doors made of zinc-coated profiles. The method according to invention is that in the process of manufacturing fire resistant doors made of zinc-coated profiles 1 , a specialized equipment is used 2 and automated welding system with option of weld cleaning and protective coating 3 application. Profiles 1 are cut on the high precision saw with the maximum tolerance of ±0.2 mm and so prepared they are positioned on a specialized table 2 which enables application of symmetrical and even force to the zinc-coated profiles connecting surfaces whose length is up to 3 m which ensures that the tolerance of connecting surfaces is below 0.1 mm. The welding is performed by means of a manipulator 3 using, depending on flat bars joined, MAG, TIG process, or plasma welding 4 , or laser welding. Plasma and laser welding is performed without additional material. The welding process is conducted from the external corner to ¼ of the joint length, and then from the internal corner to % of the joint length. The joints performed are characterized by a very narrow weld face 5 , from 1 mm to 3 mm and height exceeding the profile surface by less than 0.5 mm.
Abstract:
A side construction 302 has an outside sheathing 306 and outside sheathing reinforcement members 307A and 307B joined to the outside sheathing 306 interiorly of the outside sheathing 306. The reinforcement member 307A (307B) is shaped like a hat in section. The reinforcement members 307A provided in the vicinity of a window opening portion have a laser welding spacing L1 of 80 mm and each have a hat width of 50 mm, while the reinforcement members 307B provided on other part have a laser welding spacing L1 of 100 mm and each have a hat width of 70 mm. The reinforcement members 307A and 307B each have a height of 25 mm.
Abstract:
A side construction 302 has an outside sheathing 306 and outside sheathing reinforcement members 307A and 307B joined to the outside sheathing 306 interiorly of the outside sheathing 306. The reinforcement member 307A (307B) is shaped like a hat in section. The reinforcement members 307A provided in the vicinity of a window opening portion have a laser welding spacing L1 of 80 mm and each have a hat width of 50 mm, while the reinforcement members 307B provided on other part have a laser welding spacing L1 of 100 mm and each have a hat width of 70 mm. The reinforcement members 307A and 307B each have a height of 25 mm.
Abstract:
A method and apparatus for joining metallic vehicle frame components using magnetic impulse welding techniques is disclosed. In a first embodiment, an overlap joint is formed by the joinder of two individual open channel side rail sections (12, 13) to form a portion of a vehicle frame side rail. The first section (12) formed slightly smaller in size than the second section (13), it disposed telescopically therein with clearance. An electromagnetic coil (50) generates a magnetic field which causes the sections (12, 13) to move toward one another at a high velocity. The high velocity impact and the large pressures cause the two sections (12, 13) to weld. Alternatively, a bracket can be joined to a side rail section in a similar manner. In a second embodiment, a pair of closed channel structural members are formed using hydroforming techniques. The end portions of two hydroformed structural members are then disposed concentrically within an electromagnetic coil which causes the end portions to move toward one another so as to weld bond.
Abstract:
A method and an apparatus pertaining to polarization combining in additive manufacturing may involve emitting two or more beams of light with a first intensity. Each of the two or more beams of light may be polarized and may have a majority polarization state and a minority polarization state. A respective polarization pattern may be applied on the majority polarization state of each of the two or more beams of light. The two or more beams of light may be combined to provide a single beam of light.