Lab-Scale Extrusion

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Contents

Introduction

A laboratory-scale extrusion capability was developed at the Center for Advanced Vehicular Systems (Ms State U) to extrude billets of upto 1.5" length and 1.25" diameter using various die configurations ranging from simple circular solid profile to hollow pipe profile. An existing Instron 8850 test center was adapted for this purpose. Load at billet-die interface was recorded by a load cell while temperature on tooling components was measured by 4 K-type thermocouples - two each on sleeve and die.

Test setup

A schematic of the fixture is shown below.

Schematic of the laboratory-scale extrusion fixture

Die geometries

Flat die
Conical die

Test Matrix

Test Matrix for AZ61 billets
Test Name AZ61 Billet
Configuration
Extrusion
Ratio
Billet
Temperature (deg. C)
Ram
Velocity (mm/min.)
Die
Type
Bearing
diameter (inches)
Test 1 Cylindrical 6.25 460 5 Conical 0.5
Test 2 Cylindrical
with pocket
6.25 460 5 Conical 0.5


Test Matrix for AM30 billets
Test Name Extrusion Ratio Billet
Temperature (deg. C)
Ram
Velocity (mm/min.)
Die Type Bearing
diameter (inches)
AM30_Test-1 25 455 5 Flat die 0.25
AM30_Test-2 25 455 10 Flat die 0.25
AM30_Test-3 25 455 15 Flat die 0.25
AM30_Test-4 25 455 20 Flat die 0.25
AM30_Test-5 25 455 30 Flat die 0.25

Results

The load and temperature histories recorded in the experimental trials are presented below for AZ61 and AM30 billets.

Experimental load and temperature history obtained from AZ61 extrusion experiments


Experimental load and temperature history obtained from AM30 extrusion experiments
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