نتایج جستجو برای: resistance welding

تعداد نتایج: 389390  

Mostaan, H., Safari, M. ,

In this paper, resistance spot welding process of AISI 201 stainless steel is studied experimentally. For this purpose, effect of welding current on quality of weld is investigated and relationships between welding current and fusion zone characteristics are examined. For determining mechanical properties such as maximum load and fracture mode, tensile - shear test of spot welds is performed.  ...

2014
Yoke-Rung Wong Xin Pang

The in-process changes of weld nugget growth during the Resistance Spot Welding were investigated based on the resistance of input electrical impedance. To compute the time varying resistance of input electrical impedance, the welding voltage and current signals are measured simultaneously and then converted into complex-valued signals by using Hilbert transform. Comparing with the dynamic cont...

اسکندری, داوود, غیاث الدین, منصور, قهری, اصغر, مهاجر, کوروش, مهدی‌زاده, محمود, گلبابایی, فریده,

Introduction: Risk assessment of Toxic or hazardous chemicals enables the Industrial Hygienists to make the appropriate decision in providing healthy work place. This project was conducted in an assembling plant,(4workshop) of an Automobile Industry in IRAN with 2 types of welding operations, including GMAW (CO2 welding) and Spot resistance welding operations. . Method and Materials: Welders...

2011
I. Dinaharan N. Murugan

Over the last decade attempts have been made to fabricate aluminum matrix composites (AMCs) reinforced with several ceramic particles. Aluminum reinforced with ZrB2 particles is one such AMC. The successful application of new kind of AMCs lies in the development of secondary processes such as machining and joining. Friction stir welding (FSW) is a relatively new solid state welding which overco...

2010
Jiromaru Tsujino Eiichi Sugimoto

Ultrasonic complex vibration welding of same and different metal specimens and structures of the welded area are studied using several complex vibration welding systems, scanning and transmission electron microscopes (SEM and TEM). Ultrasonic welding can weld various metal directly using vibration and static clamping pressure. The welding area is limited very narrow layer and can weld different...

2002
M. H. SCOTT P. M. KNOWLSON

This review covers the present and future problems in the development and welding of niobium, tantalum, molybdenum and tungsten and their alloys. Their metallurgical characteristics are discussed together with the influence of impurities and alloying elements on mechanical properties, alloy development and weldability. Other factors briefly discussed are availability, high temperature strength,...

2013
M. P. MALI K. H. INAMDAR

Resistance spot welding is the most preferred and widely used method for joining metal sheets in automotive and many other industrial assembly operations. The body of a car is typically joined by thousands of spot welds. One of the many geometrical factors affecting the final geometrical outcome of the metal part assemblies is the welding process considering welding sequence used when the parts...

2006
Eija Haapalainen Perttu Laurinen Heli Junno Lauri Tuovinen Juha Röning

Process identification in the field of resistance spot welding can be used to improve welding quality and to speed up the set-up of a new welding process. Previously, good classification results of welding processes have been obtained using a feature set consisting of 54 features extracted from current and voltage signals recorded during welding. In this study, the usability of the individual f...

Journal: :international journal of iron & steel society of iran 2015
k. amini a. bahrami h. sabet

mo40 low-alloy steels are mostly used to produce industrial components such as crane wheels whichare exposed to abrasive wear. however, during working conditions, their wear resistance is reduced aftera while due to its low hardness. with increasing abrasive wear, the dimensions of components decreaseand they need to be repaired for surface modification. in this regard, hard overlay coatings ar...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2013
kondapalli siva prasad chalamalasetti srinivasa rao damera nageswara rao

austenitic stainless steel sheets have gained wide acceptance in the fabrication of components, which require high temperature resistance and corrosion resistance such as metal bellows used in expansion joints in aircraft, aerospace and petroleum industries. in the case of single pass welding of thinner sections of this alloy, pulsed current micro plasma arc welding (pcmpaw) has been found bene...

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