This includes the methods of explosive forming, electrohydraulic. Process the rapid change in explosive in to gas produce a shock wave. Processes syllabus introduction to advanced forming process, high energy rate forming process explosive, electrohydraulic, magnetic pulse forming. It is used for the manufacture of geometrically highly complex hollow bodies from tubular parts. The process to form sheet metal parts by using hydraulic parts to form the required shapes. Explosive hydroforming can efficiently form large parts up to 14 square or 10 in diameter. These techniques could include methods such as explosive forming. Also explore the seminar topics paper on hydroforming techniques with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020.
Explosive forming, however, is not necessarily a replacement for conventional metal forming techniques. Explosive forming can be used to easily produce difficulttomanufacture components. Explosive forming is a metalworking technique in which an explosive charge is used instead of a punch or press. Also explore the seminar topics paper on hydroforming techniques with abstract or. The characteristics of this process are similar to those of explosive forming. Internal highpressure forming hydroforming is a methodology for the manufacture of hollow metal components a process that has grown enormously since the mid1990s.
Numerical simulations of the hydroforming process of tial clad tshapes were conducted by using finite element analysis software. Unit iv sheet metal process typical shearing operations 1. Jul 24, 2015 numerical simulations of the hydroforming process of tial clad tshapes were conducted by using finite element analysis software. High velocity forming hvf refers to a unique set of methods which are used for metal forming and utilizes a concept which is basically different from that used in conventional forming techniques. Stretching of a sheet metal, by holding its ends or edges and bending it over a form block. Figure 1 shows the six steps of the hydroforming process. A model for deformation in high energy rate micro forming. The hydro forming is a costeffective way of shaping. These simulations were used to optimize process parameters such as internal pressure, feed distance, and friction coefficient. For large parts, explosive hydroforming can generate the forming pressure by simply exploding a charge above the part complete with evacuated mold which is. Hydroforming is categorized as a cold forming process. The hydromechanical deep drawing process has been developed as the radial hydromechanical deep drawing hydrorim process figure 4b. The process has become popular for the manufacture of aluminium.
Progressive forming rubber hydroforming bending and contouring. Oct 25, 2016 advantages o it can simulate a variety of other conventional metal forming techniques such as stamp or pressforming and spinforming in a single operation. Hydroforming is a unique forming process that uses a rubber diaphragm or bladder as a universal female for all drawn parts. Sometimes called explosive hydroforming, a workpiece and explosive is placed in a tank of water. The major difference, however, is that a chemical explosive is replaced by a capacitor bank, which stores the electrical energy. Numerical analysis of shock wave propagation and al5083. Electrohydraulic forming is a type of metal forming in which an electric arc discharge in liquid is used to convert electrical energy to mechanical energy and change the shape of the workpiece. Hydroforming simulation and experiment of clad tshapes. Internal highpressure forming hydroforming is a methodology for the manufacture of hollow metal components a process that. Explosive forming is a broad term covering many process variations. This process can deliver a great deal of flexibility in the metalforming process. Stretch forming, hydro forming, spinning are some of such processes. Simulation and experimental work on manufacturing torispherical heads in explosive hydroforming process. Tube hydroforming is one of the most popular unconventional metal forming processes which is widely used to form various tubular components.
For large parts, explosive hydroforming can generate the forming pressure by. Explosive hydro forming process in accordance with the universities and university college act 1971 and the constitution of the universiti putra malaysia p. It can be used on materials for which a press setup would be prohibitively large or require an unreasonably high pressure, and is generally much cheaper than building a large enough and sufficiently highpressure press. Jun 04, 2018 explosive forming process, explosive forming process ppt, explosive forming process in hindi, explosive forming process animation, explosive forming 2018, explosive forming titanium, explosive forming. The results indicated that tial clad tubes could be. Armour 34 provides detailed information on handling, spill cleanup. Simulation and experimental work on manufacturing torispherical heads in explosive hydroforming process article pdf available in international journal of physical sciences 78 february 2012. Several solvents commonly used in the laboratory can form explosive reaction products through a relatively slow oxidation process in the presence of atmospheric oxygen. Investigation of the electrohydraulic forming process. Applications and capabilities of explosive forming request pdf. Hydroforming process, sheet hydroforming, shell hydroforming, tube hydroforming. There are numerous applications for customers in both the automotive and the nonautomotive sectors. It is a process of particular interest to the automotive industry.
Hydro forming process spin forming spinning is the process of shaping seamless hollow cylinders, cones, hemispheres, or other. A capacitor bank delivers a pulse of high current across two electrodes, which are positioned a short distance apart while submerged in a fluid water. Explosive forming free download as powerpoint presentation. Sheet metal operations other sheet metal forming processes. The ability to quickly prototype a unitized figure 4. Explosive hydroforming explosive hydroforming is a metal forming technique that uses the energy generated by an explosive detonation to form the metal work piece.
Pdf simulation and experimental work on manufacturing. This presentation will focus on the different uses and methods of explosive forming in the aerospace as well as automotive industry. Hydro forming processes hydroforming processes are classified mainly in to 3 types as described below. Explosive forming process high energy rate forming.
For large parts, explosive hydroforming can generate the forming pressure by simply exploding a charge above the part complete with evacuated mold which is immersed in a pool of water. Stretching of a sheet metal, by holding its ends or edges and bending it over a form block, simultaneously is called stretch forming. This technique uses the energy generated by an explosive detonation to form the metal work piece. Simulation and experimental work on manufacturing torispherical heads in explosive hydro forming process. Advantages o it can simulate a variety of other conventional metal forming techniques such as stamp or pressforming and spinforming in a single operation. It can form complex parts that would otherwise require several punched and welded pieces. Explosive hydroforming, also known as herf high energy rate forming or exploform, is a striking alternative to the more traditional process of metal hydroforming. Explosive forming is the forming of sheet metal using explosive materials using large amounts of energy over a very short time.
Shell hydroforming process is used to form water tanks, lpg tanks, large building decorative objects, pressure vessel heads and largesize elbow joints with a single layer or double layers as shown in fig. Explosive forming has a long cycle time and is suitable for low quantity production of large, unique parts. Jan 01, 20 conclusion hydroforming is an innovative forming process hydroforming is becoming more popular i. So, these are number one underwater explosions, number two underwater spark discharge which is also called electro hydraulic techniques, then pneumatic. Explosive forming is a metalworking technique in which an explosive charge is used instead of. Subsequently, hydroforming experiments were conducted based on these simulations. The tooling can be much cheaper than what would be required for any presstype process. By this process, tubes are formed into different shapes. Low cost tooling makes setup for rubber forming inexpensive. The pressure over rubber membrane is controlled through out. There are a great variety of sheet metal forming methods, mainly using shear and tensile forces in the operation. The major difference, however, is that a chemical explosive is replaced by a capacitor bank, which stores the electrical. Sometimes called explosive hydroforming, a workpiece and explosive is placed in a tank of. Rubber forming is used in the aircraft industry to produce sheet metal components.
This manufacturing process is useful for the production of small quantities of parts. Explore hydroforming techniques with free download of seminar report and ppt in pdf and doc format. Detonation of the explosive forces the workpiece to assume the shape of the tool. One of these new processes is tube hydroforming and although the development of this process for the automotive industries is relative new, many. Forming with hydrostatic pressure hydro mechanical and hydro forming process. The flow of explosive materials from the from the rest of the. Figure 1 shows the six steps of the hydro forming process.
This process can deliver a great deal of flexibility in the metal forming process. Rubber forming of sheet metal manufacturing process. Forming a square section from a round tube in the socalled highpressure process is analysed and then it is shown how some of the process limits in this process can be overcome in a sequential forming process. Explosive hydroforming can efficiently form large parts up to. Numerical analysis of shock wave propagation and al5083 sheet. Explosive forming is best described as a these shortrun applications are the short lead process in which metal parts are formed by the times required and minimum expenditures for high pressures resulting from the detonation of tooling. Hydroforming techniques seminar report, ppt, pdf for. Explosive hydroforming is a metal forming technique that uses the energy generated by an explosive detonation to form the metal work piece. Parts are drawn into the rubber and produced through displacement pressure. Explosive forming definition of explosive forming by the. This paper presents an investigation on high energy rate micro forming hermf of a thin aluminum foil using a high velocity forming hvf technique.
The capacitor is charged through a charging circuit. Most deep drawn parts are usually drawn in a single operation. Conclusion hydroforming is an innovative forming process hydroforming is becoming more popular i. A finite element model was developed and verified with experimental tests for the. Explosive hydro forming is a metal forming technique that uses the energy generated by an explosive detonation to form the metal work piece. One of these new processes is tube hydroforming and although the development of this process for the automotive industries is relative new, many process variables have been studied, including. Mechanical properties imparted to the material as a result of the explosive forming process are similar. Factors to be considered while selecting an herf process. The forming process starts by placing a blank on the blank holder. This allows us to make less costly tooling with shorter leadtimes. The explosive energy replaces the male part of the tool that is used in regular forming processes. Unlike this older method, which shapes metal using pressurized hydraulic fluid pumped into a forming chamber, herf techniques utilize an explosive charge to create the necessary pressure. Explosive forming 1 unconfined type or stand off technique. Explosives are also used to compact or consolidate metal powders into near net shapes.
Explosive forming is a process in which forces produced by an explosion are used to shape a workpiece. Developments in sheet hydroforming for complex industrial. Progressive forming rubber hydroforming bending and contouring spinning processes explosive forming shearing and blanking stretch forming deep drawing. Explosive forming process high energy rate forming process. Explosive forming is the forming of sheet metal using explosive. The explosive metal forming process this technique uses the energy generated by an explosive detonation to form the metal work piece. Explosive forming is an ideal process for producing low volumes of very large metal part with low tooling costs. Mechanical properties imparted to the material as a result of the explosive forming process are similar to mechanical properties imparted to work manufactured by other forming processes. As the name itself hints, hvf or high velocity forming refers to a set of techniques which are used for metal forming. Introduction to explosives and propellants part of the text from parti of this chapter has been presented. The pressure of this shock wave is sufficient to form metal sheet. This process can deliver a great deal of flexibility in. Hydroforming techniques seminar report, ppt, pdf for mechanical.