Virtual prototyping of hot formed tailored lightweight designs eren billur 1, harald porzner 2, martin holecek 3 and taylan altan1 abstract tailored solutions are one key to the lightweight construction challenges of the future. Pdf research on formability of tailor rolled blank in. Tailor welded blanks twb are made from individual sheets of steel of different thickness, strength and coating which are joined together by laser welding. The rolling process is subjected several manufacturing constraints like the maximal thickness reduction or the maximal slope. The adoption of tailoredrolled or tailorwelded blanks i. Through the flexible rolling process and appropriate annealing treatment, the target geometry, required mechanical properties, and good formability of trb can be achieved. Great flexibility in this design is offered by trb, because the thickness and hence the strength of the components are locally increased. This paper describes the rolling process of trb, and rolling simulation model of trb was constructed using deform3d. This weight reduction trend has to be pursued through additional lightweighting technologies. Flexible rolling of tailor rolled blanks american iron and.
Shape rolling simulation of tailor rolled blanks based on. A uniform stress field is obtained along the gauge length of the. Material related design with tailor rolled products. The new technology in the automotive industry by using tailor. As a new type of variable thickness sheet structure, the trb tailor rolled blank has good prospects for the development of lightweight materials in the automotive industry. Tailor rolled blanks trbs have also been developed to overcome the drawbacks with twbs like stress concentrations across thickness transitions and other forming limitations with twbs, 14,15. Mubea tailor rolled blanks, llc in florence ky company profile.
These different blank thicknesses are made on a cold rolling mill. A tailorrolled blank is a semifinished part that can be used to produce stamping parts with continuous thickness variations. Cost reduction due to omittance of storing and one production step stackling of blanks. Tailor rolled blanktrb is worth studying due to its great development potential for auto body lightweight. Vehicle light weighting can further be achieved by using high strength aluminum alloys like. In this paper, the microstructure and mechanical properties that distribute regulation along the rolling direction of tailor rolled blanks trb were. I tailored blanks value proposal ey frqrplfdogulyhuv in order to determine, together with the design departments of the customers, whether a part is suitable as a tailor welded blank or not, tailored blanks proposes support for design and cost estimation of the ynal part. Abstractthe purpose of this paper is to provide efficient lightweight design for improving the loading carrying efficiency and energy absorption capability of tailor rolled blank thinwalled structure with tophat section trbth under transverse loading. The use of tailored rolled blanks, with variable blank thickness, is a relatively new application in. Based on the production process, tailored blanks can be categorized in four different groups fig. A tensile specimen of tailor rolled blanks with equal probability in. Ohsas 18001 occupational health and safety management system pdf, 160.
Welding techniques for tailored blanks yasunobu miyazaki1 tatsuya sakiyama1 shinji kodama1 abstract welding principles and notes in laser welding, plasma welding and mash seam welding are discussed. In earlier work 3 it has been shown that strip profile rolling spr can be used to produce metal strips with a predefined thickness distribution across the width of the strip. The use of tailoredrolled blanks, with variable blank thickness, is a relatively new application in. The result is a tailor welded coil which has all the advantages of a classic tailored product and can be used in many areas in the automotive industry. Tailor tubes, a process and equipment are required that forms the plate to tubes and. Before the introduction of tailor welded blanks, automobile parts were stamped one by one based on the the different thicknesses and material compositions of each part.
This profile for mubea tailor rolled blanks, llc is located in florence, ky. Due to the development of lightweight technology in the automobile industry, tailored blanks based on new material processing technology such as tailor welded blanks twb and tailor rolled blanks trb have been widely studied and well developed recently. Manufacturing of tailorrolled blanks with thickness. A tailor rolled blank is a semifinished part that can be used to produce stamping parts with continuous thickness variations. Abstractthe purpose of this paper is to provide efficient lightweight design for improving the loading carrying efficiency and energy absorption capability of tailorrolled blank thinwalled structure with tophat section trbth under transverse loading. Rolling processes with a varying roll gap allow the production of blanks with adjustable sheet thickness in rolling direction. This paper focuses on the manufacturing and processing of tailored products, i. Structural bonding of lightweight cars crash durable, safe. Tensile behavior of tailor rolled blanks with longitudinal thickness transition zone. Tailor welded blanks are defined as two or more sheets of blanks with equal or different thickness, strength, or surface coatings welded together before forming process in the automotive workshop. Twbs can be composed of 1 two or more different thicknesses, 2. Research on trb springback characteristics has great significance for further applications due to variations in the sheet thickness and gradient distribution of the. In the united states, arcelormittal has one whollyowned tailored blanks facility in detroit and operates three joint ventures. The so called tailor rolled blanks trb are produced by a closed loop controlled modification of the roll gap during the flat rolling process ensuring that the predefined thickness distribution is achieved within tight tolerances.
Tailor welded blanks and coils are made from individual sheets or slit coils and can combine various thickness, grade, and coatings as required by the end used product into a single sheet or coil. Research on formability of tailor rolled blank in stamping. Finding the best thickness run parameterization for. The thickness variations are desired to obtain a loadoptimized wall. The adoption of tailored rolled or tailor welded blanks i. This study investigates a manufacturing process that can produce a tailored rolled blankstrb having variable. This study investigates a cold manufacturing process to fabricate a trb with variable thickness variations in both the longitudinal and latitudinal directions. As a result of the flexible rolling process, the number of. Selected processes and modeling techniques for rolled. It is common to use optimization techniques in order to identify and tab existing lightweight potentials as well as design tailor. However, when used to achieve uniform mechanical properties, the conventional method of aluminum trb leads to low formability and excessive springback, and it also requires additional heat treatment because of thickness difference and.
A tensile specimen of tailor rolled blanks with equal. The key idea of the socalled tailor heat treated blanks thtb is optimization of the mechanical properties by local heat treatment before the forming operation. In this paper, we will focus on hot stamping of tailor rolled blanks trbs, as illustrated in figure 1. Experiments and preliminary simulation results rogelio perezsantiago1, eren billur2, agim ademaj3. Tailorrolled blanks are ideal not only for vehicle body structural components, but also for suspension components that encounter different loads across their length. Tailor rolled blanks trb is made by flexible rolling system. Springback characteristics of cylindrical bending of tailor.
The formability of trb was studied by simulation and experiment. Tailored coils a new process to further expand tailored. Manufacturing of sheet metal parts from tailor rolled blanks. Nov 18, 2015 tailor welded blanks were originally produced by the german firm thyssenkrupp steel ag in 1985. Tailor rolled blanks shall be produced from continuous cast hot or cold rolled coilsstrip usually supplied in thicknesses 1. Dimensional characteristics of tailor rolled blanks. An accurate description of material properties is crucial to predict the forming behavior of tailor heat treated blanks by simulation. The new technology in the automotive industry by using. Flexible rolling of tailor rolled blanks innovative light weight design in steel dr. A new tensile specimen is introduced to evaluate the tensile behavior of tailor rolled blanks. Request pdf manufacturing of sheet metal parts from tailor rolled blanks with respect to the preserving of ressources, lightweight construction and the. Bending analysis and design optimisation of tailorrolled.
And the thickness of trb can be determined according to the load of this section. Optimization potentials of tailor rolled components for. Mubea contact contact options international contacts. The new technology in the automotive industry by using tailor welded blanks yan qi abstract. Iterative learning control for tailor rolled blanks 2 1. Mubea tailor rolled blanks gmbh, attendorn credit report. Laser welding direction is parallel to the rolling direction. Dimensional characteristics of tailor rolled blanks having. Accurate analysis and thickness optimization of tailor. Read increasing of the drawing depth using tailor rolled blanksnumerical and experimental analysis, international journal of machine tools and manufacture on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at. By varying the rolling nip parts with load adapted thickness profiles and continuous transitions are manufactured. Tailor welded blanks were originally produced by the german firm thyssenkrupp steel ag in 1985. Tailor rolled blanks trb are sheets with a continuous thickness transition. Mubea tailor rolled blanks technology main requirements security of passenger cell market related requirements euroncap iihs narrow design of the upper area benefits with trb ideal load distribution due to harmonic transition zones no notch effect tuning of crash performance by adjusted gauges.
High performance computing speeds up optimization processes for tailor rolled blanks at mubea download pdf. May 17, 20 tailor rolled blanktrb is worth studying due to its great development potential for auto body lightweight. Jan 10, 2017 using the cold stamping process, aluminum tailor rolled blanks trb have been recently used to manufacture automotive parts to reduce the body weight of cars. Iterative learning control for tailor rolled blanks. Increasing of the drawing depth using tailor rolled blanks. Tailor welded blanks are defined as two or more sheets of blanks with equal or different thickness, strength, or surface coatings welded together before forming process in the. Tailored blanks are semifinished parts, which are typically made from sheets with different. Twb is mainly used in the body in white area for joining metal sheets of.
First, a new finiteelement fe modelling method for the trbth structure is proposed. Tailorwelded or tailorrolled blanks are related technologies that make use of this principle. Virtual prototyping of hot formed tailored lightweight. Twb company expanded its core business of tailor welded blanks for use in sheetfed transfer and. In combination with advanced high strength steel, tailor welded blanks offer substantial potential for vehicle safety improvement and. Search our database of over 100 million company and executive profiles.
Tailor rolling blankstrb act an important method for automobile lightweight, the process model of trb forming panels is put forward, key technologies for trb rolling including trb synthesized mathematic model, integrated control model of trb thickness based on multidomains and frame model of trb thickness integrated control are presented fused with virtual manufacturing technologyvmt and. Tailor welded or tailor rolled blanks are related technologies that make use of this principle. Optimization potentials of tailor rolled components for twist. Annealing of hc340la tailor rolled blankscontrol of. Mechanics of thinmechanics of thin walled tailor rolled memberswalled tailor rolled members 6. Patchwork blanks are sheets that are locally reinforced by attaching smaller sheets patches in the lap configuration by laser welding or adhesives.
Investigation of tailored blank production by the process. Trb was used for square box forming, and the effects of thickness transition zonettz position as well as blank size on the formability of trb were analyzed. To fully exploit the potential of sheet and profiles, various technologies to produce tailored blanks and profiles have been developed 1,2. Europe pmc is an archive of life sciences journal literature. Tailor rolled blanks trb have been extensively used in the automotive industry because of lightweight. Mubea relies on hyperworks unlimited for automotive. Virtual prototyping of hot formed tailored lightweight designs eren billur 1. In combination with advanced high strength steel, tailor welded blanks offer substantial potential for vehicle safety improvement and weight savings while reducing overall production costs. While existed traditional methods can hardly solve these problems. Combined isogeometric analysis iga and shape optimization, this paper provides a method that can accurately analyze tailor rolled blanks trb and optimize its thickness profile continuously. Trbtwb in the automotive industry has been known to offer great potential for the optimization of weight, function, cost and complexity.
View company leaders and background information for mubea tailor rolled blanks, llc. Apr 14, 2016 combined isogeometric analysis iga and shape optimization, this paper provides a method that can accurately analyze tailor rolled blanks trb and optimize its thickness profile continuously. Integrated lightweight construction this is a combination of various materials and functional characteristics based on the use of bonding technologies and production processes. The results obtained from uniaxial tensile test revealed that the total elongation of tailor rolled blanks decreases from 3 to 0. Pdf excel mubea tailor rolled blanks, llc overview.
Tailored blanks can be made by, welding tailor welded blanks. Tailor blanks tubes although twb is not new for the automotive industry, it is yet relatively unknown for truck frames. Virtual prototyping of hot formed tailored lightweight designs. Trb has a continuous transition between the thick and thin and a better surface quality.
Integrated hot forming and heat treatment process on al6061. Apr 28, 2018 europe pmc is an archive of life sciences journal literature. Mubea tailor rolled blanks, llc in florence ky company. Pdf research on formability of tailor rolled blank in stamping.
Effects of thickness ratio on the total elongation of tailor rolled blanks. The usage of aluminum alloys in the automotive industry has significantly increased in recent years leading to a substantial weight reduction. Generally, cold rolled steel coils are introduced into a continuous hotdip. Tailor rolling blanks trb act an important method for automobile lightweight, the process model of trb forming panels is put forward, key technologies for trb rolling including trb synthesized mathematic model, integrated control model of trb thickness based on multidomains and frame model of trb thickness integrated control are presented fused with virtual manufacturing technologyvmt and. High performance computing speeds up optimization processes. Trbtwb in the automotive industry has been known to offer great potential for the optimization of. Tailored blanks with different blank thicknesses are semifinished parts that can be used to produce. Process design of aluminum tailor heat treated blanks. Introduction tailor rolled blanks, which are introduced in the car manufacturing industry, are rolled steel production with varying thickness. Tailored blank atailored blank is a sheet of steel that combines several grades and or various thicknesses and or different coatings, the. Hence, load adapted thickness material runs are possible which lead to semifinished products tailor rolled blanks and parts stamped parts and tubes made from tailor rolled blanks. Mubea relies on hyperworks unlimited for automotive component. Springback characteristics of cylindrical bending of.
Resource library customer stories high performance computing speeds up optimization processes for tailor rolled blanks at mubea download pdf oems and suppliers include every possible technique to support lightweighting in the automotive industry. With its good bearing capacity and designed, it can be used to make automotive body for reducing the material and lower the weight. The stamped parts were then welded together to create a complete piece. Tailor rolled blanks trb are an established lightweight application for highly stressed structural parts in automotive industry. Tailored profiles made of tailor rolled strips by roll. Accurate analysis and thickness optimization of tailor rolled. Pdf tailor rolled blanktrb is worth studying due to its great development. Use of tailor welded blanks twb and tailor rolled blanks trb in hot stamping has been studied since 2008 and 2006, respectively. We have opened up completely new areas of application for tailored steel solutions with the development of tailor welded coils. Oems and suppliers include every possible technique to support lightweighting in the automotive industry. Because of few amount of molten metal in laser welding, it is necessary to keep a gap narrow between welding edges and to track the weld line. Mubea tailor rolled blanks gmbh has its registered office in attendorn, germany. Tensile behavior of tailor rolled blanks with longitudinal thickness. Mubea mubeamubea sssstargets regarding tailored rolled twist beamtargets regarding tailored rolled twist beam.
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