Butt welding

About: Butt welding is a research topic. Over the lifetime, 7153 publications have been published within this topic receiving 44467 citations.

Preliminary research of the thermomechanical properties of the round drive belts

Abstract: Most of the industrial machines use the round-shaped drive belts for the power transfer. They are often a few millimetres in diameter, and made of thermoplastic elastomer, especially polyurethane. Their production process requires the bonding step, which is often performed by butt welding, using the hot plate. The authors took an effort to design the automatic welding machine. This action demands the hot plate welding process analysis, which consists in describing the dependency between technological parameters (temperature, pressure force, time) and the quality of the joint. To analyse this process in a proper way, it is necessary to describe the physical phenomena in the material during temperature and force impacts. In this case the research of thermomechanical properties of the belts is needed. The paper shows results of some preliminary research of the thermomechanical properties of the polyurethane. This research allows to predict the material reaction to increased temperature and force during hot plate welding.

Novel modelling approach to optimisation of welding conditions and heat treatment schedules for age hardening Al alloys

Abstract: In the present paper the general purpose finite element code WELDSIM, equipped with a new natural aging model, is used to calculate the minimum heat affected zone (HAZ) strength level σ min and the equivalent half width of the reduced strength zone Δyeq red of strength σ min during single pass butt welding of Al–Mg–Si alloys. In particular, it is illustrated how the resulting strength loss depends on the interplay between the base metal chemistry and the initial temper condition on the one hand and the net arc power q 0, the welding speed v, the plate thickness d and the effective heat transfer coefficient h between the Al plate and the steel backing on the other hand. Assuming one-dimensional heat flow and pseudosteady state, the former parameters can be combined in a single group variable q 0/vd, which uniquely defines the HAZ thermal programme when welding is performed without the use of steel backing. Taking this as the main variable controlling the strength loss, the simulation results can be...

Argon gas filling protection device for biphase stainless steel pipe line welding

Abstract: The utility model relates to an argon gas filling protection device for biphase stainless steel pipeline welding The device is used for welding a biphase stainless steel pipeline in which argon gas is filled, and belongs to the technical field of the manufacture of argon gas filling equipment for biphase stainless steel pipeline butt welding for delivering gas The utility model is provided with two end pipe inner end plugs and a flexible corrugated pipe for filling argon gas The device can realize the local argon gas substitution for a butt-welding area The utility model comprises a front end plug, a rear end plug, the corrugated pipe and a gas filling pipe The device solves the problems when a biphase stainless pipe in the prior art is welded, one of the biphase stainless pipe is plugged, and the other end is open, and the whole journey argon filling of the whole pipe can not satisfy technological requirements After a welded elbow and a three-way are arranged, the device can also be taken out Welded seams welded by the device can keep in proportion that austenite and ferrite respectively occupy 50% The consumption of the argon gas is only 1/20 of the whole pipe argon gas filling of the prior art

Manufacture of high performance alloy in elongated form

Abstract: A method is described for obtaining extrusion products of "high performance" alloy wire of small cross section in an economical fashion. The ratio of length to cross section of cast "high performance" alloy preforms limits the length of a filled billet to less than the optimum which may be extruded on available extrusion presses where it is desired to obtain small diameter extrusion products in a single extrusion. This limitation is overcome by squaring the ends of cast lengths of the alloy and then butt welding such lengths to compositely form preforms of the maximum length capable of being extruded on a given extrusion press. The composite preforms are extruded in a filled billet in accordance with the teachings of U.S. Pat. No. 4,209,122. The extrusion products from these composite preforms have the same desirable properties described in that patent and extend the benefits described therein.