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The paper presents a benchmarking analysis that investigates the efficiency gap in relation to spot welding robots in automotive body shops at foreign and domestic companies in North America. The main purpose of this paper is to determine body shop efficiency improvement opportunities for the domestic companies or the Big Three, therefore reducing the competitive gap and improving business performance.

The following paper is an extension of an earlier dissertation study conducted by EL-Khalil that focused on improving body shop overall efficiency. The Harbour Report was utilized to determine the best in class facilities that must be visited for benchmarking purposes. The data and information presented were obtained from the facilities visited through observations and interviews. The research utilized the corresponding facilities' labs in order to perform measurements and inspect product welding efficiency. The data obtained were a result of a two-year benchmarking study.

The inspection results of spot welds applied on the door flange do not justify the utilization of additional spot welding arm designs and/or robots for the domestic companies. The data presented provide a good opportunity for improving business performance at the body shop Big Three facilities. In order to reduce the current competitive gap, decrease cost, and improve utilization, the Big Three must adopt new strategies (i.e. communization of specific vehicles parts).

The benchmarking study was limited to the aperture area. Researchers are encouraged to test the propositions further on different types of vehicles and different areas of the vehicle body.

Based on the actual findings, this paper presents a case that impacts the improvements of the body shop overall performance in relation to reducing the number of spot welding arm and robot designs at the automotive industry in North America.

The presented gap analysis on body shop spot welding efficiency for automotive companies in North America was not conducted previously. Therefore, the data can be utilized as a benchmark target to drive improvements at the domestic automotive body shops.

The development of robotized welding is truly impressive and is today one of the major application areas for industrial robots. The first industrial robots were introduced in the early 1960s for material transfer and machine tending. Not long after that, robots were used for spot welding and in the early 1970s for arc welding as well. During the years, significant developments have taken place both concerning the robot equipment and the welding equipment to meet the different challenges within the application area. This paper describes the development and progress of robotization in welding over the years and also some projections and trends for the near future.

This paper describes the development of a variety of robot welding and grinding systems. Also discusses the benefits of running arc welding cables within the body of the robot and the use of a computer controlled welder. Also covers digitally controlled spot welding and communication with a supervisory computer. Finally, discusses de‐burring and the opportunities for further development in this area.

In this report, accounts will be presented on the experience obtained from approximately 100 practical applications of industrial robots. The industrial robots used derive partly from the company's own production as well as from other domestic and foreign robot manufacturers.

A combination of new machines and new companies to make them is signalling a switch in emphasis from spot welding to arc welding robots in readiness for the next wave of increased sales, though this does not mean spot welding robots are by any means dead.

More than half of the industrial robots throughout the world are used in the automobile industry. The following deals with the most important application so far, spot welding in car‐body construction, and one with a promising future, namely, assembly.

Describes recent trends and developments in the application of robots within the Japanese automotive industry. Highlights the importance of the development of electric servo spot welding guns and digitally controlled arc welders. Also describes the use of cooperating robots and other robot developments that have resulted in the elimination of specialised mechanisms and parts transfer systems. Stresses the importance of international collaboration for the further development of Japanese robot industries.

Aims to describe the new tendency of Japanese robotic industry observed at the International Robot Exhibition 2005 in Tokyo.

Reports new robots, robotic systems and research.

Finds that Japanese robotics is trying to support the future direction of the nation.

Introduces an approach to study what is going on in the Japanese robotic community based on the social needs of the country.

This paper seeks to describe how GM Manufacturing Luton in the UK is examining the case for raising the number of installed robots as a means of increasing van assembly for when the next generation vehicle is launched. Also describes some operational experience associated with a variety of industrial robots in body‐in‐white and spray painting environments.

Describes the major production line techniques that are used in the manufacture of compact van body‐in‐white (BIW) steel structures; as well as the functions of robotized painting. BIW techniques include spot‐welding and sealants.

Over the space of the last four years or so, the management of GM Manufacturing Luton has been tackling constraints in the bodyshop using General Motors' through‐put improvement process (TIP) to achieve greater utilization of its existing capacity, and improving productivity.

General motors has a system of continuous improvement, which it uses in most of the functions involved in the assembly of a motor vehicle. As part of this process engineers are continually looking at ways of removing constraints from equipment in the bodyshop and working closely with equipment suppliers to reduce the number of hours required to build a van body. But as proposals to build the next generation of vans are being considered so too is the requirement to increase the number of robots in the bodyshop. There is also much to be gained from the interchange of information between the various plants within General Motors worldwide with a view to implementing continuous improvement. In this connection, benchmarking is one of the techniques employed to ensure that the Luton facility is not only in step with sister GM plants to improve quality and productivity, but also is best placed for winning the next generation vehicle programme.

It is likely that, arising out of greater plant integration and utilization, the management of GM Manufacturing Luton Ltd (GMM Luton) will be able to further increase the capacity of its van production units to be in a position to move to the next stage of expansion, namely to edge towards a target of 100,000 units a year.

This is the first time in the UK that Comau Smart H4 robots have been used on a significant scale. The introduction of these robots created a steep learning curve both for those installing the machines and for those operating them. The plant as a whole makes use of various makes of robot including Comau in the bodyshop and KUKA, Fanuc and Durr machines in the paint shop. The company is also preparing the ground for the introduction of the next generation of robot, the Comau NH4.

A Canadian company, FH Welding Machines, is a signficant supplier to the major US and US‐based Japanese automobile builders. Many of their systems incorporate robots.