Metal Processes, Re-distribution Flashcards
What is press forming
Sheet metal is clamped over a die of the product that will determine the final shape of the pressing. A hydraulic press pushes the die into the sheet metal, the sheet of metal is then remove and the process can be done over and over again
What is spinning?
it is where a circular sheet of metal is clamped onto a rotating former which is symmetrical. the sheet of metal is then pushed onto the former by a roller till the shape is made
What is cupping
A sheet of metal is clamped down above a hole. then a drawing punch pushes the sheet into the hole making the cupped shape although the depth of the sheet doesn’t surpass the length of the diameter
What is deep drawing
this is when the length of the object exceeds the length of the diameter. A sheet of metal get clamped down above a hole, this sheet of metal then gets pushed into the hole by a deep drawing punch to create a circular object such as a can of coca cola.
What is forging
forging is where metal gets heated and then shaped by using localised compressive forces. usually done with a hammer and anvil.
What is drop forging?
A die is made from cast tool steel and this is secured to the top of an anvil. a ram is also equipped with a die that resembles a mould the ram then creates the compression force the moulds the heated work piece into the shape of the dies
What is bending
this is where a sheet or plate is put on top of a die and pressed down by a pressure punch to bend the metal into place. the machine most commonly used is known as a press brake
What is rolling
this is where the stock material is then passed through sets of rollers to reduce the thickness of the material
What is sand casting
this involves pouring molten metal into a prepared cavity in a sand mould and allowing it to solidify
What is investment casting
investment casting is also known as the lost wax process. A shell mould is built up around a wax pattern that can be melted away leaving a cavity which is then filled with molten metal
What is die casting
Die casting is the process of forcing molten metal under high pressure into the cavities of steel moulds. the moulds are called dies
What is low temperature casting
Metals such as Pewter and silver can be cast into jewellery and other items using moulds carved or cut into MDF, Cuttlefish, Silicone or Vucanised Rubber
