What do you mean by extrusion, Mechanical Engineering

Q. What do you mean by extrusion?

• Extrusion is a process used to create objects of a fixed cross-sectional profile. A material is pushed or drawn through a die of the desired cross-section.

• The two main advantages of this process over other manufacturing processes are its ability to create very complex cross-sections and work materials that are brittle, because the material only encounters compressive and shear stresses.

• It also forms finished parts with an excellent surface finish.

• Hollow cavities within extruded material cannot be produced using a simple flat extrusion die, because there would be no way to support the center barrier of the die. Instead, the die assumes the shape of a block with depth, beginning first with a shape profile that supports the center section.

• The process begins by heating the stock material. It is then loaded into the container in the press. A dummy block is placed behind it where the ram then presses on the material to push it out of the die. Afterward the extrusion is stretched in order to straighten it.

• The extrusion ratio is defined as the starting cross-sectional area divided by the cross-sectional area of the final extrusion.

• One of the main advantages of the extrusion process is that this ratio can be very large while still producing quality parts.

Posted Date: 6/1/2013 1:50:17 AM | Location : United States







Related Discussions:- What do you mean by extrusion, Assignment Help, Ask Question on What do you mean by extrusion, Get Answer, Expert's Help, What do you mean by extrusion Discussions

Write discussion on What do you mean by extrusion
Your posts are moderated
Related Questions
Q. Define Maximum Allowable Working Pressure? The MAWP to be marked on the Section VIII nameplate is defined as the maximum gauge pressure permissible at the top of a completed

Calculate plastic zone: Calculate plastic zone ahead of crack in above problem if σY = 250 MPa. Solution From Eq. Here KI is taken as KI max since the plastic

Machining Processes In machining processes, also known as Metal cutting or chip forming processes, material is removed from a work piece to get the final shape of the product.

Q. Show the procedure of Welding of vessels? Welding of vessels, including pressure retaining parts and attachments thereto, shall be performed utilizing Welding Procedures, We

Compression Ratio (r): It is the ratio of the total cylinder volume when the piston is at the bottom dead centre, V t to the clearance volume, V C . R= v t /v c

Determine: Reaction forces at the supports The shear and moment diagrams The location and value of the maximum shear and moment The cross section is an angle section as given in

Derive the mathematical Heat Conduction equation through a composite wall. Determine Thermal contact Resistance ?

law of belting

Limitations of resistance welding 1). Pressure - tight joints are achieved only with flash butt welding. Resistance welding is not recommended for high pressure joints a

calibration curve standard temparature vs indicator temprature.