Changes in material type or wall thickness specifications can typically be accommodated with hydroforming without creating a need for new tooling. In most applications, only one form tool is needed which pushes a piece of sheet metal into a pressurized rubber bladder. The simulation is a very important method to help to develop this process. The principal of tube hydroforming is given in figure 1. Please follow the detailed help center instructions to transfer the files to supported ereaders. Sumit thakur mechanical hydroforming seminar and ppt with pdf report. However, with recent advancements in computer controls and highpressure hydraulic systems, the process has become a viable method for mass production, especially with the use of internal pressures of up to 6,000 pounds per square inch psi. Tube hydroforming often produces stronger structural components than can be achieved with more conventional methods. The goal of the study is to maximize formability by identifying the optimal internal. In this respect, necessity for the procedure improvement of flu id forming is constant.
The stress state at a given time and location varies with the process history and the. Tube hydroforming process tube hydroforming thf is a process of forming hollow parts with different cross sections. Pdf optimization of a tube hydroforming process ranny. One of the reasons of its improvement is the procedure performance in optimal conditions. Designing a tube hydroforming thf process means selecting and taking into account several different elements of the technology see figure 1.
This paper mainly focuses on the study of evaluation of laser seamed tube hydroformability. The process parameters have the direct in fluence on quality and optimal of forming procedure. Each of these components plays an important role in the success of the process and they have to be addressed during the process development stage. These are briefly stated in the following sections. Development costs prototyping is often a necessary step in the manufacturing process. Tube hydroforming is a metal forming process which uses pressurized. Coordination of the internal pressurization and axial feeding curves is critical in the tube hydroforming process to generate successful parts without fracture or wrinkling failure.
The hydroforming process also produces considerably less waste than most forming processes. Jul 16, 2014 as an effective method to evaluate the tube hydroformability, forming limit curve flc has been widely applied on the hydroforming process design. Simulating rotary draw bending and tube hydroforming. The tube hydroforming process thf is a relatively complex manufacturing process. Hydroforming process for an ultrasmall bending radius elbow. It covers the fundamentals of both tube hydroforming the most common and sheet metal hydroforming, with guidelines for product design, funamentals selection, and computer simulation of the process and tool design. Theoretical and experimental study on formability of laser. Types of hydroforming process hydroforming process is divided into two main groups. Figure 1 schematic of tube hydroforming shows a schematic of the hydroforming process.
This paper provides an example of the fluid p ressure. Tube hydroforming tube hydroforming is used in the production of various tubular parts, which are highly resistant and light. Building a large post frame garage full timelapse construction. The tube hydroforming process has gained increasing attention in recent years. Under the right circumstances, hydroforming can be a viable, costeffective manufacturing process.
Hydroforming process, sheet hydroforming, shell hydroforming, tube hydroforming. For this reason, the tube hydroforming technology will be first analyzed as a system, i. How are steel pipes produced steel pipe manufacturing process at the factory duration. Animated view of aminos sheet hydroforming process. Internal highpressure forming hydroforming is a methodology for the manufacture of hollow metal components a process that has grown enormously since the mid1990s. The development of this process for automotive industries is relative new and many process variableshave been studied, like. At the ends of the tube 2 cylinders are placed that can apply axial feeding. For 304 stainless steel, during the forming deformation, the induced martensitic transformation takes place at the deformed area in an anisotropic way, leading to the development of texture and working hardening. Hydroforming is a fluid based manufacturing method. In tube hydroforming thf there are two major practices. By this process, tubes are formed into different shapes using internal pressure and axial compressive loads simultaneously to. You will be shocked when you find out what this machine does. Tube hydroforming is mostly applied in automotive industry.
Finally, hydroforming tools are easily mounted and aligned, making setups fast and efficient. There are numerous applications for customers in both the automotive and the nonautomotive sectors. Hydroforming is a unique process that offers many benefits over traditional sheet metal forming and fabrication. This page contains hydroforming seminar and ppt with pdf report. Tubular hydroforming tube hydroforming mills products. Mar 07, 2015 hydroforming seminar and ppt with pdf report. Hydroforming allows precision tolerances without springback, allowing the production of net shape or highly accurate parts. Tube hydroforming thf has been called with many other names depending on the time and country it was used and investigated. Most of our machines have a maximum capacity of 30,000 psi. Reliability analysis of the corner filling test in the tube hydroforming process 111 chen yang, yushen hu, lixia fan and wenxiu xin study on the loadcarrying capability of the tubular part hydroformed through the. We excel at condensing multiple parts into single, lightweight hydroformed parts.
Mar 05, 2001 tube hydroforming has been wellknown since the 1950s. By this process, tubes are formed into different shapes. By this process, tubes are formed into different shapes using internal pressure and axial compressive loads simultaneously to force a tubular blank to conform to. Hydroforming seminar ppt with pdf report study mafia. Tube hydroforming is one of the most popular unconventional metal forming processes which is widely used to form various tubular components. Tubular hydroforming is gaining popularity in several markets for its track record of producing better quality components at a lower cost. Presently, the hydroforming process is widely applied to various fields, such as home appliance. Largest tube hydroforming process machine is capable of 1,000 tons.
Bladder hydroforming is very similar to stamping, except that a rubber diaphragm backed by 18,000 psi of oil acts as the mating half to the punch. Bladder hydroforming and tubular hydroforming by ultimate. Micro tube hydroforming device based on scaled down conventional hydroforming tooling. Hydroforming is particularly interesting for the automotive industry as it offers important advantages from various perspectives. Conclusions compared with conventional metal forming technologies, hydroforming is still quite new and only one broad application background has been explored, although it has been in process of development for many years, especially sheet hydroforming and tube hydroforming using liquid as the forming media. The first industrial applications for this process, namely the production of tshaped joints, were published in papers in the 1960s. This article explains tube hydroforming, describes its evolution, and discusses the factors that should be considered when deciding whether to use the process. Our 800 ton hydroforming press is capable of forming parts at pressures up to 60,000 psi, allowing us to process a wide range of tubing sizes and shapes. Pdf optimization of a tube hydroforming process ron. Jul 19, 2014 you will be shocked when you find out what this machine does. A process process a, figure 4 was developed specifically for larger structural parts and was the real beginning of using hydroforming for this purpose. Hydroforming is a costeffective way of shaping tensile metals such as aluminum, brass, low alloy set els, unstained steel into lightweight, structurally stiff and strong pieces. Fundamentals of hydroforming provides an introduction to tube and sheet hydroforming.
Compared with stampings and castings, hydroformed tubular sections provide further mass savings for structural components. Pdf parameter optimization of tube hydroforming semantic. A tube is insert into a tooling cavity, filled with a fluid and is expanded with very high pressure into the tool. An approach is presented to optimize a tube hydroforming process using a genetic algorithm ga search method. Nov 06, 2011 animated view of aminos sheet hydroforming process. The book also explains how to hydropiece holes and slots, how to select tha materials and tubes, pre and postoperations, various methods of assembly, the. Hydroforming techniques seminar report, ppt, pdf for mechanical. One of the advantages of hydroforming sheet metal, in either of the process described above, is the final pieces will be have a better surface finish and uniform appearance and accuracy. This course provides an introduction to rapid part modification, tooling and process design for tube forming parts followed by simulation of bending, forming and hydroforming processes using autoform tubexpert.
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