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Impact extrusion is a manufacturing process similar to extrusion and drawing by which products are made with a metal slug. The slug is pressed at a high velocity with extreme force into a die or mold by a punch .
Extruded holes with the punch and die used to create them. No pilot hole was used on the left. Punching is a forming process that uses a punch press to force a tool, called a punch , through the workpiece to create a hole via shearing .
Tools and punches can be interchanged for different part requirements. One advantage of hydroforming is the savings on tools. For sheet metal only a draw ring and punch (metalworking) or male die is required. Depending on the part being formed, the punch can be made from epoxy, rather than metal.
Extrusion dies use extremely high pressure from the punch to squeeze the metal out into the desired form. The difference between cold forming and extrusion is extruded parts do not take shape of the punch. Forming: Forming dies to bend the blank along a curved surface.
The compound tool differs from progressive and stage tools by the arrangement of the punch and die. It is an inverted tool where blanking and piercing takes place in a single stage and also the blanking punch will act as the piercing die. That means punch will be to the bottom side of the tool and piercing punches to top side of the tool.
A typical compound fine blanking press includes a hardened die punch (male), the hardened blanking die (female), and a guide plate of similar shape/size to the blanking die. The guide plate is the first applied to the material, impinging the material with a sharp protrusion or stinger around the perimeter of the die opening.
For the process, the piece of metal is placed against a tool that presses it forward, called a "Punch". the punch pushes the metal through a Die, or more commonly 2 Dies, which are designed to push against the metal until it reaches a desired flatness. This also results in the piece being made longer, as the process spreads the metal out more ...
The punch forms the bend so that the distance between the punch and the side wall of the V is greater than the material thickness (T). Either a V-shaped or square opening may be used in the bottom die (dies are frequently referred to as tools or tooling).