What are the explosives used in explosive forming process?

Explosive forming – process description The workpiece is situated directly above the die and explosive material placed above that. The explosive material is typically Trinitrotoluene (TNT), a mixture of acetylene and oxygen or Nitroglycerine.

What is explosive forming and its types?

The main elements involved in the explosive forming process are: the explosive charge, an energy transfer medium, a forming die and the workpiece. One can distinguish two main types of explosive forming: the contact technique and stand-off technique [1] .

What are the types of sheet metal forming process?

6 Common Sheet Metal Forming Process

• #1) Curling. Curling is a sheet metal forming process that’s used to smooth out the otherwise sharp and rugged edges of sheet metal.
• #2) Bending. Another common sheet metal forming process is bending.
• #3) Ironing.
• #4) Laser Cutting.
• #5) Hydroforming.
• #6) Punching.

In which of the following process an explosion are used to shape a work piece?

Explosive forming is a metalworking technique in which an explosive charge is used instead of a punch or press.

What is explosive welding process?

Explosive welding is a solid-state process in which controlled explosive detonations force two or more metals together at high pressures. The angle of collision causes the plasma to jet in front of the collision point, effectively scrub-cleaning both surfaces, and leaving clean metal behind.

What is metal forming process?

Metal forming is a fabrication process that creates structural parts and components out of metal sheets or tubing. A basic metal forming process will bend or deform a metal workpiece to a desired geometric shape.

What are the 3 main defects found in sheet metal forming processes?

Wrinkles, splits, and springback are the three most common defects encountered during sheet metal stamping.

How does explosive forming work?

An explosive forming is one of the techniques to form a metal plate using high shock pressure from the explosion. An explosive releases its energy instantly so that an extremely high pressure with short duration occurs at the instance of explosion. Because of this effect, the metal plate may stop its deformation.

What are the process variables in explosive welding?

Scheme of the parallel system and the shape of the ejector die in the welding process. The basic parameters are: VD Y detonation velocity, VP Y velocity of plate collision, Vc – velocity at the collision point, β Y collision angle, h Y distance between the plates, C Y collision point.

How does an explosive form a metal plate?

An explosive forming is one of the techniques to form a metal plate using high shock pressure from the explosion. An explosive releases its energy instantly so that an extremely high pressure with short duration occurs at the instance of explosion. The underwater shock wave travels downstream and then it hits the metal plate to be formed.

What kind of material is used for explosive forming?

Explosive forming of vacuum tube anode (plate) materials. In the late 1950s, the General Electric company developed an application for five-layer sheet metal composites that had been created using the explosive forming process.

Is the explosive forming process a substitute for existing processes?

Although explosive forming cannot be regarded as a substitute for existing processes, it is an extension of the techniques now in use in the sense that it enables a number of difficult materials to be formed to a high degree of accuracy and at low cost.

Where does the forming of an explosive take place?

A metal sheet is placed onto the die, the die cavity is vacuumed and the assembly is placed underwater. The forming part of the process takes place next, inside the water tank or ‘explosion’ tank where the die is placed. The workpiece is situated directly above the die and explosive material, or the TNT is placed above that.

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