|
Category
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META-LAX
Equipment
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Other
VSR Equipment
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1.
Operating Principles
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Uses patented
SUB-harmonic vibrational energy for dwell which is optimum when
using vibrations to stress relieve metal,* looks for harmonic
curve to shift and stabilize to indicate stress relief is complete.†
* Lockheed
Missiles
† University
of CA - Berkeley
|
Continuous
vibration at resonance.*
* Instruction
manuals
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2.
Effectiveness and Field Support
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Consistently
as good as results from heat treat stress relieved workpieces.*†
* General
Motors
† 2000
Meta-Lax users
|
40% of treated
workpieces are as effective as heat treat stress relieved workpieces.*
Resonant vibrations are inconsistent and may cause damage.†
* U.S. Navy
† Battelle
Memorial Institute
|
|
3.
Laboratory Support
|
Results comparable
to heat treat stress relief.*†‡
* U.S. Department
of Energy
† Welding
Consultants
‡ Grumman
Aerospace
|
Results NOT
comparable to heat treat stress relief.*†
* U.S. Navy
† Battelle
Memorial Institute
|
|
4.
Mathematical Support
|
Both operating
principles of Meta-Lax processing have been verified using acceptable
engineering practices and formulas.*†
* Lockheed
Missiles
† University
of CA - Berkeley
|
Resonance
vsr processing does not have mathematical support. |
|
5.
Documentation / Certification
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An
X-Y DataGraph is used to plot response of workpiece to induced vibrations.
Harmonic curve is monitored to show shift and stability into new
frequency location to certify stress relief is complete. |
Optional
strip chart recorder can be used to monitor "on-time."
Or, an X-Y plotter may be used to show two scans. Neither approach
certifies stress relief completion. Automatic mode on one model
vibrates part at three "preset" frequencies. |
| 6.
Applied DURING Welding |
Weld metal
is easily and quickly deposited, weld distortion and weld cracking
are lower as is porosity and other weld defects, preheat temperature
may be reduced.*†‡
* General
Motors
† Giddings
& Lewis
‡ Applied
Fusion Tech
|
Unacceptable
decanting [bonding]. Weld spatter is a problem, weld metal is
repelled and process is uncomfortable for welder.*
* Applied Fusion Tech
|
| 7.
General Practice of Customers |
Typically
used in place of heat treat stress relief when stress relief benefits
are desired, and use during welding to reduce weld distortion, weld
cracking and other weld defects. |
Typically
used only when heat treat stress relief cannot be used. |
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