ME 324 – LAB #2
UPSETTING, EXTRUSION, AND BENDING
Part 1:Upsetting (compression) test
Reading Assignment: Chaper2. Section 2.3
Apparatus:
Hydraulic testing machine
Caliper
Micrometer
Materials and Specimens:
Gray Cast Iron
AISI 1020 Steel
Procedure:
1. Using a caliper and/or the micrometer, measure the diameter and length of each
specimen. Record your measurements on the data sheet.
2. Rub the lubricant on top and bottom surfaces of the specimen. Place the specimen
between two supporting disks. Make sure that the specimen axis is concentric with the
supporting disks.
3. Move hydraulic press upwards until contact with the supports is achieved.
4. Place the safety guards around the testing area.
5. Start applying the compressive load and observe the changes in the shape of the
specimen closely.
6. Continue applying the compressive load slowly until the specimen fails.
7. Stop the test and remove the specimen.
8. Measure the final length and the diameter. Record your measurement on the data
sheet.
1020
Initial Diameter Do
Initial Length Lo
Maximum Load, PU
Length at Maximum Load, LU
Initial Area, Ao
Final Area, AF
% Area increase
% Length reduction
GCI
Part 2: Extrusion Process
Reading Assignment: Chapter 15, Sections: 15.1 - 15.10. (pp. 369-382)
Apparatus:
Hydraulic Testing Equipment
Experimental extrusion apparatus
Caliper
Materials and Specimens:
Lead
Procedure:
1. Measure the dimensions of the lead cylinder specimen, and the extrusion die.
2. Rub the lubricant over the lead specimen and insert it into the extrusion apparatus.
3. Insert the plunger into the extrusion apparatus and place the whole set up on the
hydraulic testing machine.
4. Move hydraulic press upwards until contact with the supports is achieved.
5. Start applying the compressive load and observe the changes in the shape of the
specimen closely.
6. Record the applied load during the extrusion process.
7. Stop the test before the whole lead cylinder is extruded
8. Remove the specimen from the apparatus and measure the extruded dimensions,
record them on the data sheet.
Initial Diameter Do
Initial Length Lo
Final Diameter, AF
Initial Area, Ao
Final Area, AF
Extrusion ratio, R
Extrusion force (experimental) , FE
Extrusion force (calculated) , F
Part 3: Bending Test
Reading Assignment: Chapter 16, Section 16.5 (pp 407-411)
Apparatus:
Vise
Pliers, adjustable spanners
Materials and Specimens:
1020 Steel
Stainless Steel
Aluminum
Magnesium
Procedure:
1.
2.
3.
4.
Measure the thickness of each specimen and record it.
Place one end of the specimen between the jaws of the vise and tighten.
Bend the specimen using the pliers or the spanner slowly.
Remove the specimen and measure the bending radius. Record the
measurement.
5. Repeat the test for all specimens.
Material
Thickness, T
Bending Radius, R
Engineering Strain, e
Report:
Complete the data sheets for each part of the lab and present them as tables.
Include sample calculations and formulas used.
Summarize
Compression
30%
Extrusion
40%
Bending
30%
By Emrah Simsek