scholarly journals Examination of Spot Welded Seam of a Car Body

2018 ◽  
Vol 9 (1) ◽  
pp. 27-30
Author(s):  
Andrew Andraws ◽  
Károly Széll
Keyword(s):  
Stress Intensity ◽  
Spot Welding ◽  
The Body ◽  
Industrial Robots ◽  
Production Costs ◽  
Car Industry ◽  
Car Body ◽  
Welded Seam ◽  
Spot Welded

Abstract Spot welding is widely used in car industry to create a cheap and light body and chassis. Engineers tend to use spot-welding in order of reducing the production costs, also lowering the stress intensity which can cause failure and fractures of the body or chassis. Our goal here is to examine spot-welding of a car body with different tests and find out later if there is a possibility of using a different technology that can produce a better seam that can be automated with industrial robots.

scholarly journals Production Automation as A Factor in Improving Product Quality in The Automotive Industry

2020 ◽  
pp. 1-25
Author(s):  
Ewa Kulińska ◽  
Dariusz Masłowski ◽  
Małgorzata Dendera-Gruszka ◽  
Lilianna Wojtynek ◽  
Konstanty Szeląg
Keyword(s):  
Product Quality ◽  
Spot Welding ◽  
Industrial Robot ◽  
Welding Process ◽  
Quality Parameters ◽  
The Body ◽  
Production Costs ◽  
Production Automation ◽  
The Impact

The automation of production is an important element in the functioning of any production enterprise. The aim of this article is to analyze the quality of the product made manually with the use of spot-welding machines and to analyze the quality of the product made by the industrial robot type "Fanuc Robotics S-420i". The analyzed product was the front panel of the body, made of semi-finished products in the spot-welding process. During the analysis, the impact of production automation on the product quality was found. Applications of the robotized welding process are used not only because of better quality parameters, but also because of the significant reduction of production costs and less fatigue of employees. The robot operator is a quality controller and contributes to quality management.

scholarly journals Improving the properties of AA7075 resistance spot-welded joints by chemical oxide removal and post weld heat treating

2020 ◽  
Vol 64 (12) ◽  
pp. 2119-2128
Author(s):  
Marcell Gáspár ◽  
Ádám Dobosy ◽  
Miklós Tisza ◽  
Imre Török ◽  
Yangchun Dong ◽  
...  
Keyword(s):  
Welded Joints ◽  
Heat Treating ◽  
The Body ◽  
Experimental Program ◽  
Artificial Ageing ◽  
Body Parts ◽  
Car Body ◽  
Resistance Spot ◽  
Spot Welded ◽  
Weld Heat

Abstract The aluminium alloy studied in this paper is the heat treatable AA7075 which has zinc as the main alloying element. 7xxx aluminium alloys have the best strength performance among all commercial series and AA7075 has tensile strength above 500 MPa. The outstanding strength properties open the possibility to use this alloy in automotive industry as a possible alternative material for car body elements instead of steel. However, their limited formability properties mean obstacle when a complicated shape car body panel is formed, since the elongation is limited only between 5 and 11%. In order to successfully form these sheets into the demanded geometry, hot forming should be used, and thus the body panels should be formed when the AA7075 is in a solution heat treated condition, such as using the HFQ® process. Then, after assembling the body elements, when resistance spot welding is among the most common joining methods, the AA7075 body parts should get the artificial ageing. It means that welding is followed by artificial ageing as a kind of post weld heat treating which can partially compensate the softening of this alloy during welding. Softening is considered among the most challenging weldability issues similarly to the high melting point oxide layer at the surface which also reduces the load bearing capacity of RSW joints. During the performed experimental program, three routes were investigated. The RSW experiments are performed on 1-mm-thick AA7075 sheets. The spot-welded joints were examined by macroscopic testing, tensile shear and hardness tests.

scholarly journals Numerical and Experimental Study of AlSi Coating Effect on Nugget Size Growth in Resistance Spot Welding of Hot-Stamped Boron Steels

2021 ◽  
Vol 5 (1) ◽  
pp. 10
Author(s):  
Ali Afzal ◽  
Mohsen Hamedi ◽  
Chris Valentin Nielsen
Keyword(s):  
Welded Joints ◽  
Resistance Spot Welding ◽  
Spot Welding ◽  
Focal Point ◽  
The Body ◽  
Weld Nugget ◽  
Boron Steel ◽  
Resistance Spot ◽  
Boron Steels ◽  
Spot Welded

In recent years, increasing automotive safety by improving crashworthiness has been a focal point in the automotive industry, employing high-strength steel such as press hardenable steel (PHS). In addition to the improved strength of individual parts in the body of the vehicle, the strength of the resistance-spot-welded joints of these parts is highly important to obtain a safe structure. In general, dimensions of weld nuggets are regarded as one of the criteria for the quality of spot-welded joints. In the presented research, a three-dimensional axisymmetric finite element model is developed to predict the nugget formation in resistance spot welding (RSW) of two types of PHS: the uncoated and AlSi-coated 1.8 mm boron steel after hot stamping. A fully coupled electro-thermo-mechanical analysis was conducted using the commercial software package Abaqus. The FE predicted weld nugget development is compared with experimental results. The computed weld nugget sizes show good agreement with experimental values.

Failure to Accelerate

2017 ◽  
Author(s):  
Peter Scott
Keyword(s):  
United States ◽  
The United States ◽  
International Perspective ◽  
Production Costs ◽  
Car Ownership ◽  
Success Story ◽  
Car Industry ◽  
Fundamental Reason ◽  
European Standards ◽  
Market Diffusion

From an international perspective, the inter-war car industry was a British success story. Britain ranked only second to the United States as the world’s leading producer of, and market for, automobiles, owing to a relatively strong domestic market by European standards. However, while consumers’ expenditure was high, it was not deep—car ownership per capita in 1938 being around a third of US levels. This chapter examines why the British automobile sector failed to take off into mass market diffusion. A number of important factors are highlighted, including lower British wages relative to the United States; punitive vehicle and petrol taxation; and the high unit production costs incurred in serving a market too small to justify Fordist mass production. However, a more fundamental reason was the low priority given to car ownership in a relatively small, densely populated, and highly urbanized island nation with well-developed public transport networks.

Designing a detachable body with sliding side walls and a roof

2021 ◽  
Vol 18 (1) ◽  
pp. 62-71
Author(s):  
O. I. Zaynitdinov ◽  
Keyword(s):  
Practical Importance ◽  
Atmospheric Precipitation ◽  
Middle Part ◽  
The Body ◽  
3D Design ◽  
Car Body ◽  
Simultaneous Loading ◽  
Side Walls ◽  
Loading And Unloading ◽  
Technical Solutions

Objective: Selection of technical solutions for designing a covered detachable body fence with sliding side walls and a roof. Methods: A detachable body with sliding side walls and a roof was designed in accordance with several technical and regulatory documents using the KOMPAS-3D design software. Results: The covered detachable body with sliding side walls and a roof designed for the carriage of goods that require protection from atmospheric precipitation has been proposed. A scheme of a lock for side sliding doors and a linkage scheme of the doors’ middle part have been developed. Drawings of the main load-bearing elements of the car body are presented, including the underframe with three longitudinal and several transverse and auxiliary beams. The diagram of fastening the sliding door roller assemblies on the car body to the lower longitudinal beams and to the upper beam is given. Practical importance: The covered detachable body with sliding side walls and a roof allows reducing the time and human effort of loading and unloading the car, provides simultaneous loading and unloading of goods both from the side and from the top of the body using various hoisting devices.

Theoretical and Numerical Calculation on the Added Mass of Ahmed Body

2017 ◽  
Vol 865 ◽  
pp. 247-252
Author(s):  
Gui Tao Du
Keyword(s):  
Numerical Calculation ◽  
Theoretical Calculation ◽  
Calculation Method ◽  
Aerodynamic Drag ◽  
Added Mass ◽  
The Body ◽  
Power Performance ◽  
Car Body ◽  
The Impact ◽  
Ahmed Body

Because of the added mass, the aerodynamic drag of the automobile will increase obviously when accelerating in the still air. In this paper, it firstly gave the definition of the added mass, and presented that there was little research on the calculation of the added mass of automobile. Then through the analysis of the theoretical calculation method for the added mass, it pointed out that, for the added mass of the car-body with a complex shape, there was much difficulty in the theoretical calculation. Alternatively, a numerical calculation method for the added mass of car-body was derived. The simulation model adopted the Ahmed body and the corresponding verification experiment was completed in the Tongji Automotive Wind Tunnel center. The results indicate that the added mass is a constant which is only dependent on the body-shape. For the model investigated, the added mass is 0.0052kg that is approximately equal to the air displaced by the car-body. As the body accelerates to 4m/s2, the aerodynamic drag is increased by 1.89% because of added mass. Therefore, it needs to pay more attention to the impact that the added mass has on the dynamic performance of vehicle when proceeding the aerodynamic designs (especially for the high power performance vehicles). Meanwhile, it still makes a correction to the conventional aerodynamic drag formula. This paper also demonstrates that, with the analysis of the flow-field of car-body, the added mass essentially stems from the additionally work done by the car-body to increase the kinetic energy of external fluid as it speeds up.

scholarly journals IMPACT OF THE ENVIRONMENT AND SOCIETY ON ROBOTICS INNOVATIONS

2021 ◽  
Vol 5 (6) ◽  
pp. 1-10
Author(s):  
Atef ATA ◽  
N. M. Fonseca Ferreira
Keyword(s):  
Elderly People ◽  
The Elderly ◽  
Social Needs ◽  
Industrial Robots ◽  
Car Industry ◽  
The Social ◽  
Smart Mobile ◽  
Robotic Applications ◽  
And Robotics ◽  
Indoor And Outdoor

Over the engineering history, environmental and social needs inspire the development and innovation of many wonderful applications. For example, when the industrial robots entered our industrial life, great advances especially in automotive industry where the industrial robots cover about 90 % of the car industry activities started to change our own life. As the number of elderly people is increasing rapidly all over the world, this requires us to focus on their needs as their children left them alone in our busy daily life. Mechatronics and robotics can offer many possibilities to help elderly people by providing smart solutions for their daily needs as well as entertaining them during their lonely long stay at their homes. Many companies are providing smart mobile robots in different platforms (wheeled or walking) to help the elderly people depend on themselves in receiving their food and medicine at prescheduled times. Other companies are interested in providing smart wheel chairs to help the elderly people navigate indoor and outdoor freely and conveniently without any external help. Meanwhile, some companies are providing entertainment robots in different shapes to talk, play and communicate with elderly people in a nice way. The objective of this paper is to explore the mechatronics and robotics capabilities to assist elderly people and to make their life easier, comfortable and self-governing without any external help. This paper will highlight also the effect of the environment and the social needs in inspiring new innovations. As an example, the innovations by Badi Az-Zaman Ismail Al-Jazari, a Muslim scientist, will be investigated. This paper is going to discuss also the idea and the motivation behind two of Al-Jazari’s robotic applications (Although the term robot was not coined at that time). These two devices are the washing hands and the peacock fountain. Although he used to apply mechanical structure and fluid for controlling the motion of the two devices, they were very beautiful and resemble some of the robotic applications nowadays.   

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