Influence of network parameters on the accuracy of control and diagnostics of resistance welding

The influence of parasitic parameters of the power supply network (active resistance and inductance) on the accuracy of resistance welding diagnostics is estimated. Evaluation of the effectiveness of various control algorithms when operating under conditions of fluctuations in the supply voltage is performed. The methodic for determining the parasitic parameters of the network is presented. Keywords: resistance welding, automation, control and diagnostics. [email protected]

WELDOX960 Low Alloy High Strength Steel Welding Automation Manufacturability Research

This article combined with the practical production conditions,introduced the welding process parameter’s selection and operation technology of one-side welding with back formation for welding robot of WELDOX960 steel.The welding practices indicate that:when adopts the welding robot CO2+Ar to perform the one-side welding with back formation operation to WELDOX960 low alloy high strength steel,the setting of welding process parameters has the great impact to the high strength steel welding performance.

Advanced Gas Tungsten Arc Weld Surfacing Current Status and Application

Gas Shielded Tungsten Arc Welding (GTAW) – a process well-known providing highest quality weld results joined though by lower performance. Gas Metal Arc Welding (GMAW) is frequently chosen to increase productivity along with broadly accepted quality. Those industry segments, especially required to produce high quality corrosion resistant weld surfacing e.g. applying nickel base filler materials, are regularly in consistent demand to comply with "zero defect" criteria. In this conjunction weld performance limitations are overcome employing advanced 'hot-wire' GTAW systems. This paper, from a Welding Automation perspective, describes the technology of such devices and deals with the current status is this field – namely the application of dual-cathode hot-wire electrode GTAW cladding; considerably broadening achievable limits.

Towards achieving a fully intelligent robotic arc welding: a review

Purpose – The purpose of this paper is to review the progress made in arc welding automation using trajectory planning, seam tracking and control methodologies. Design/methodology/approach – This paper discusses key issues in trajectory planning towards achieving full automation of arc welding robots. The identified issues in trajectory planning are real-time control, optimization methods, seam tracking and control methodologies. Recent research is considered and brief conclusions are drawn. Findings – The major difficulty towards realizing a fully intelligent robotic arc welding system remains an optimal blend and good understanding of trajectory planning, seam tracking and advanced control methodologies. An intelligent trajectory tracking ability is strongly required in robotic arc welding, due to the positional errors caused by several disturbances that prevent the development of quality welds. An exciting prospect will be the creation of an effective hybrid optimization technique which is expected to lead to new scientific knowledge by combining robotic systems with artificial intelligence. Originality/value – This paper illustrates the vital role played by optimization methods for trajectory design in arc robotic welding automation, especially the non-gradient approaches (those based on certain characteristics and behaviour of biological, molecular, swarm of insects and neurobiological systems). Effective trajectory planning techniques leading to real-time control and sensing systems leading to seam tracking have also been studied.