scholarly journals Weld Domination

2001 ◽  
Vol 123 (04) ◽  
pp. 66-68
Author(s):  
Michael Valenti
Keyword(s):  
Electrical Current ◽  
High Volume ◽  
Welding Quality ◽  
Laser Measurement ◽  
Cycle Times ◽  
Measurement Systems ◽  
Core Technology ◽  
Welding Torch ◽  
Machine Shops ◽  
Welding System

This article illustrates that factories and machine shops use automated controls, sensors, and continuous electric arcs to make faster welds better. Welding system manufacturers, such as Lincoln Electric Co. of Cleveland, work with robot manufacturers, including ABB, to integrate their products and tailor automated welding systems that make faster precision welds. At the same time, instrumentation companies, such as LMI Selcom of Gothenburg, Sweden, have developed sensors to improve the precision of automated welding systems even further in high-volume applications. LMI Selcom Robotic Guidance of Gothenburg, Sweden, developed its SeamFinder laser measurement systems to improve the welding quality and cycle times of robotic. A key component to the Power MIG 200 is its Diamond Core technology, an internal assembly that provides a constant electrical current to the welding torch. A Michigan-based welding company taking advantage of the Power MIG 200’s smooth arc is Midstate Utility in White Cloud. The company fabricates machinery used to install telephone cable. Midstate Utility has been using the Lincoln unit since October of 2000.

Paper 6: Design Tolerances in Laser Measurement Systems

1968 ◽  
Vol 183 (4) ◽  
pp. 29-33
Author(s):  
W. R. C. Rowley ◽  
D. C. Wilson
Keyword(s):  
Laser Source ◽  
Laser Measurement ◽  
Measurement Systems ◽  
Interferometric Measurement

Interferometric measurement of length by fringe-counting, using a laser source, is a precision technique suitable for both engineering and laboratory applications. The limitations of such systems, in respect of speed and straightness of movement, are considered. Equations are given to assist the specification of the optical requirements and mechanical tolerances.

An All-Ceramic Interconnect for Use in Solid-Oxide Fuel Cell Stacks

MRS Bulletin ◽  
2005 ◽  
Vol 30 (8) ◽  
pp. 596-600 ◽  
Author(s):  
Thomas A. Morris ◽  
Eric A. Barringer ◽  
Steven C. Kung ◽  
Rodger W. McKain
Keyword(s):  
Fuel Cell ◽  
Solid Oxide Fuel Cell ◽  
Cost Model ◽  
Electrical Current ◽  
High Volume ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Fuel Gas ◽  
All Ceramic ◽  
Ceramic Interconnect

AbstractThis article summarizes a unique approach in which all-ceramic interconnects are used in place of metal interconnects in solid-oxide fuel cell (SOFC) stacks. The approach combines advanced SOFC materials with the manufacturing technology and infrastructure established for multilayer ceramic (MLC) packaging for the microelectronics industry. The MLC interconnect is fabricated using multiple layers of yttria-stabilized zirconia (YSZ) tape, with each layer containing conductive vias to provide for electrical current flow through the interconnect. The all-ceramic interconnect design facilitates uniform distribution of air and fuel gas to the respective electrodes of adjacent cells. The multilayer interconnects are fabricated using traditional MLC manufacturing processes. A detailed description of the processes for fabricating the all-ceramic interconnect is presented.To aid in moving from prototype fabrication to commercialization of these fuel cell systems, a detailed cost model has been used as a roadmap for commercial stack development. Cost model projections are presented for three different interconnect footprint sizes. These projections show an SOFC stack cost of less than $150 per kilowatt for the optimized SOFC stack design produced at high volume.

Kalman Filtering for Seam Tracking in Master-Slave Robot Remote Welding System

2011 ◽  
Vol 314-316 ◽  
pp. 1005-1008
Author(s):  
Hong Tang Chen ◽  
Hai Chao Li ◽  
Hong Ming Gao ◽  
Lin Wu
Keyword(s):  
Kalman Filtering ◽  
Seam Tracking ◽  
Experimental Results ◽  
Welding Quality ◽  
Welding Seam ◽  
Tracking Process ◽  
Key Factor ◽  
Remote Welding ◽  
Welding System

Welding seam tracking precision is a key factor influencing welding quality for master-slave robot remote welding system. However, it does not satisfy the welding requirement due to significant noises. To eliminate the influence of noises upon the seam tracking precision and improve the seam tracking precision, a master-slave robot remote welding system was built and Kalman filtering (KF) was applied to the seam tracking process. The experimental results show that the KF eliminated the influence of noises upon the seam tracking precision and improved the seam tracking precision.

The Hybrid Compression Moulding of Structural Composite Materials for Automotive Applications

2020 ◽  
Vol 843 ◽  
pp. 3-8 ◽  
Author(s):  
Helena C. Simmonds ◽  
Neil C. Reynolds ◽  
Kenneth N. Kendall
Keyword(s):  
Composite Materials ◽  
Manufacturing Process ◽  
Fibre Composite ◽  
Material Design ◽  
High Volume ◽  
Ford Motor Company ◽  
Compression Moulding ◽  
Cycle Times ◽  
Class Project ◽  
Automotive Suspension

The Innovate-UK-funded Composite Lightweight Automotive Suspension System (CLASS) project, led by Ford Motor Company and partnered by Gestamp UK, GRM Consulting and WMG, investigated the use of carbon fibre reinforced composite materials to decrease the weight of a complex automotive rear suspension component in support of reduction in vehicle emissions. A multi-material design comprising discontinuous fibre composite (C-SMC), aligned fibre composite laminate (prepreg) and steel was developed. A high volume hybrid compression moulding manufacturing process was developed at WMG, achieving total press cycle times of around 5 minutes. Prototype parts were manufactured and evaluated using materials characterisation techniques to validate the manufacturing methods. The optimum C-SMC charge pattern was investigated to achieve complete fill with minimal pre-processing. Destructive and nondestructive analysis of the hybrid parts was performed to understand resultant hybrid material macrostructure. This innovative design and manufacturing process resulted in a component 35% lighter than the original multi-piece steel design.

Multi-Pass Route Planning for Thick Plate of Low Alloy High Strength Steel by Double-Sided Double Arc Welding

2012 ◽  
Vol 590 ◽  
pp. 28-34 ◽  
Author(s):  
Cheng Dong Yang ◽  
H.Y. Huang ◽  
H.J. Zhang ◽  
Y.X. Chen ◽  
San Ben Chen
Keyword(s):  
High Strength Steel ◽  
Arc Welding ◽  
Thick Plate ◽  
High Efficiency ◽  
Route Planning ◽  
High Strength ◽  
Welding Parameters ◽  
Welding Torch ◽  
Welding System

Double-sided double arc welding (DSDAW), a high efficiency method for welding thick plate of low alloy high strength steel which does not require back chipping is used in this paper, research on multi-pass route planning for thick plate of low alloy high strength plate by double-sided double arc welding. Firstly, establish a double-sided double arc welding system that can realize thick plate of low alloy high strength steel double-sided double arc welding by double robots. Then, Propose the multi-pass route planning for thick plate of low alloy high strength steel by double-sided double arc welding by means of misplaced welding. According to the welding parameters and the geometry size of groove, plan the layers, the number of beads and the concrete position of the welding torch for each bead. Finally, the welding experiment has been done to verify the effectiveness of multi-pass route planning. The results of welding experiment are approximately agreement with the multi-pass route planning results. The backing weld can get better appearance in the front and guarantee fusion penetration in the back simultaneously. On the basis of the multi-pass welding route planning, good fusion and leveling interface can be obtained after filler passes.

Thermoactivated Pinning - A Novel Joining Technique for Thermoplastic Composites

2012 ◽  
Vol 188 ◽  
pp. 176-181 ◽  
Author(s):  
Werner Hufenbach ◽  
Robert Kupfer ◽  
Andreas Hornig
Keyword(s):  
Mechanical Properties ◽  
High Volume ◽  
Tensile Tests ◽  
Thermoplastic Composites ◽  
Structural Effects ◽  
Short Cycle ◽  
Cycle Times ◽  
Lap Shear ◽  
Thermoplastic Matrix ◽  
Manufacturing Techniques

Due to their good mechanical properties and short cycle times during processing, textile-reinforced thermoplastic composites gain increasing relevance for high-volume lightweight applications. Beyond that, by exploiting its specific processing capabilities, this composite material enables a variety of novel manufacturing techniques, e.g. for assembling. In this paper a joining technique is presented, which utilises the meltability of the thermoplastic matrix to establish a material-adapted joining method by introducing slender metallic pins into the composite structure. The processing principle is described and structural effects in the joining zone are analysed by means of microscopy. The load bearing behaviour is characterised by tensile tests on double-lap-shear specimen.

scholarly journals Mixed Reality-Enhanced Intuitive Teleoperation with Hybrid Virtual Fixtures for Intelligent Robotic Welding

2021 ◽  
Vol 11 (23) ◽  
pp. 11280
Author(s):  
Yun-Peng Su ◽  
Xiao-Qi Chen ◽  
Tony Zhou ◽  
Christopher Pretty ◽  
J. Geoffrey Chase
Keyword(s):  
Haptic Feedback ◽  
Mixed Reality ◽  
Hand Movements ◽  
Robotic Welding ◽  
Virtual Fixtures ◽  
Working Space ◽  
Welding Operation ◽  
Welding Torch ◽  
Operating Space ◽  
Welding System

This paper presents an integrated scheme based on a mixed reality (MR) and haptic feedback approach for intuitive and immersive teleoperation of robotic welding systems. By incorporating MR technology, the user is fully immersed in a virtual operating space augmented by real-time visual feedback from the robot working space. The proposed robotic tele-welding system features imitative motion mapping from the user’s hand movements to the welding robot motions, and it enables the spatial velocity-based control of the robot tool center point (TCP). The proposed mixed reality virtual fixture (MRVF) integration approach implements hybrid haptic constraints to guide the operator’s hand movements following the conical guidance to effectively align the welding torch for welding and constrain the welding operation within a collision-free area. Onsite welding and tele-welding experiments identify the operational differences between professional and unskilled welders and demonstrate the effectiveness of the proposed MRVF tele-welding framework for novice welders. The MRVF-integrated visual/haptic tele-welding scheme reduced the torch alignment times by 56% and 60% compared to the MRnoVF and baseline cases, with minimized cognitive workload and optimal usability. The MRVF scheme effectively stabilized welders’ hand movements and eliminated undesirable collisions while generating smooth welds.

A Decade of High Accuracy Die Attach Equipment and Process Developments (Addressing Photonics Device Packaging Challenges)

2014 ◽  
Vol 2014 (DPC) ◽  
pp. 001727-001758
Author(s):  
Johann Weinhaendler ◽  
Rudolf Kaiser ◽  
Hardy Kellermann
Keyword(s):  
Form Factors ◽  
High Volume ◽  
High Accuracy ◽  
Success Factor ◽  
Cycle Times ◽  
Laboratory Setup ◽  
Aspect Ratios ◽  
Die Attach ◽  
Alignment Algorithms ◽  
Vision Alignment

Fueled by the Internet and nowadays unlimited connectivity expectations, the assembly of optoelectronic packages became a key element to enable the explosive growth in the communication field around the entire globe. The primary challenge in the field of advanced optoelectronics and photonic device packaging (e.g. laser diodes, VCSEL's, optical benches, lenses etc.) is to accurately align the different optical components in reference to each other for optimal optical device performance. This growing need for high precision die attach (<= 0.5um @ 3 sigma) systems and solutions at the shortest possible cycle times has been studied and implemented by AMICRA Microtechnologies. AMICRA's state of the art high accuracy automated assembly system solutions have been successfully used for over a decade in both a laboratory setup and a high volume manufacturing environment. From handling a large variety of substrate materials, thin and fragile chips with odd aspect ratios, lenses and other components, the flexible and dynamic vision alignment concept and the bonding process controls required to achieve high overall component placement accuracies has been AMCIRA's industry focus since the company's inception. While significant progress has been made to provide solutions for all communications and photonics applications there are currently still some challenges out there to be overcome, challenges that can also change on an application by application basis. Besides the technical challenges the cost effectiveness or cost per bond for those applications is a very critical overall success factor as well. This paper will elaborate on manufacturability concerns and equipment automation challenges associated with the key parameters of a Photonics applications high accuracy die attach process which, amongst others, not only require highly sophisticated vision alignment algorithms but also thermal transfer processes either using an eutectic process or a laser soldering technique. Given the ever shrinking packaging form factors, all of AMICRA's research and developments in the Photonics field have also been successfully introduced and applied in more traditional semiconductor applications which have an increasing need for high accuracy die attach.

Sign in / Sign up

Export Citation Format

Share Document