# a cylindrical billet essay

Alloys

1 . A cylindrical bar stock that is 95 mm extended and 55 mm in diameter is reduced simply by direct (forward) extrusion to a 20 mm diameter. The die position is 85?. the stream curve pertaining to the work steel has a power coefficient of 800 MPa. Determine (a) extrusion percentage, (b) accurate strain (homogeneous deformation), (c) ram pressure, and (e) ram push. 2 . A billet that may be 75 logistik long with diameter sama dengan 35 logistik is direct extruded to a diameter of 20 millimeter. The extrusion die has a die angle = 75. For the task metal, k= 600 MPa.

Determine (a) extrusion ratio, (b) true tension (homogeneous deformation), ram pressure and (d) ram force. 3. A great L-shaped strength section can be direct extruded from a great aluminum coupure in which Lo = two hundred and fifty mm and Do = 88 mm. Measurements of the cross-section are given listed below. Die perspective = 85?. Determine (a) extrusion rate, (b) entire extruded section if the booty remaining in the container by the end of the ram memory stroke is 25 mm. 12 62 50 12 4. Calculate the pressure required in extruding copper mineral at 700C, if the billet diameter is usually 125 logistik and the extrusion ratio is 20.

your five. Calculate the extrusion force for a circular billet, 200 mm in diameter created from beryllium and extruded for 1000C to a diameter of fifty mm Select one topic just with a number of 5 members. To be posted on the sixteenth December 2013 1 . Manage and body of a large ratchet wrench Number 1 . one particular shows the handle and body section of a large ratchet wrench, including those combined with conventional plug sets. The look specifications require a material with minimum deliver strength of 345 MPa and an elongation of at least 2% in all directions.

Additional consideration should be provided to weight minimization (because in the relatively large of the wrench), corrosion resistance (due to storage and use environments), machinability (if finish engineering is required), and appearance. Figure 1 . 1 1 . Depending on the size and shape of the product, describe many methods that could be used to create the part. For each approach, briefly talk about the relative pros and cons. installment payments on your What types of architectural materials might be able to meet the requirements? What could be the pros and cons of each and every general friends and family? 3.

For every of the shape generation methods in question one particular, select the right material from the alternatives talked about in question 2, making sure that the procedure and material are compatible. 4. Which of the combinations do you feel would be the “best answer to the problem? For what reason? 5. To your proposed remedy, would any additional heat treatment or area treatment be expected? If so , what would you recommend? 6. If a variety of this tool may be marketed as being a “safety tool, that could be used in areas of gas leaks in which a spark might be fatal, how would you improve your prior recommendations in terms of material? Go over briefly

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