|
Products
Charpy/Impact
Testing
Drop
Tower
Pendulum Machines
Automatic Charpy
Machines
Instrumented
Impact Testing
Quality Control
Specimens
Double Pendulum
Dynamic Tear
In-Situ Heating &
Cooling
Automatic
Pendulum Return
Automatic
Specimen Transfer
Percent Shear,
Lateral Expansion, Notch Verification
Digital Optical Comparator
Hardness
Testing
Charpy Data
Fitting
Circuit
Board Testing
Beverage Can Tester
Tongs
Shock Testing
Refurbished Equipment
MultiPurpose
Corrosion Cell
High Temperature
Reference
Electrode
Pressure Vessel
Manufacture
Pre-Owned
Equipment
Buy and
Sell
Analytical
Services
Finite
Element/Fracture
Mechanics
Neutron Transport
Analysis
P-T Curve
Analysis
Experimental
Services
Mechanical
Property Testing
Surveillance
Capsule Testing
Failure
Analysis
Services
Failure Analysis
News &
Information
MPM
Product
News
Directions to MPM
Nuclear News
| |
  
Figure 1 - MPM Tower Configured for
ASTM D3763 Puncture Test |
Figure 2 - Combination Drop Tower Built to Satisfy
ASTM D3763 and for High Velocity Hail Impact Simulation |
Figure 3 - Explosive
Materials
Drop Tower with 20-Foot Drop Height |
Introduction
MPM manufactures drop tower test machines for a wide variety of impact
tests. The MPM drop tower systems can be configured to satisfy several
ASTM standards including: ASTM E23, E208, E436, D3763, D256, D2444, and
D6110. In addition to the above listed ASTM standards, MPM drop towers
can be constructed to meet API standards such as the API recommended
practice 5L3. The MPM basic tower design is easily modified to
accommodate special impact testing needs. Recent examples include towers
for
circuit board testing and a tower that was
designed for testing explosive materials.
The drop tower shown in Figure 1 is configured for the ASTM D3763 puncture
test. This machine includes the automatic drop height control system, an
instrumented striker, a velocity measurement transducer, a pneumatic
specimen clamp (see photograph under "Test
Configuration"), an initial velocity launcher, and a safety enclosure.
In Figure 2, the tower shown is a combination drop tower which includes
hail impact simulation and high velocity The drop tower shown in Figure 3 is for the study of explosive
materials and is also equipped with an instrumented striker and the
automatic drop height control system.
System Features
If requested, the MPM drop tower test machines can be provided
with instrumented strikers. An instrumented
striker option is used in applications that require measurement of
absorbed energy. However, some of the standards listed in the
introduction, such as ASTM E436 and API 5L3, are focused on dynamic tear
measurement and do not require the use of an instrumented striker. Some
important features of the MPM drop tower are listed below:
- Rigid frame construction and precision bearings
minimize transverse play of the rail cart
- The test machine can be provided with an
electrically driven motor for raising the rail cart to the desired drop
height
- The test machine can set the drop height
automatically under computer control and the machine is also equipped
with a digital readout and hand control to accurately set the drop
height manually
- The test machine is equipped with a
computer-controlled rail cart release and also includes a push button
pneumatic release for manual control
- The base of the test machine is enclosed inside a
six-foot tall polycarbonate enclosure with an interlocked door for
safety during testing. The door is designed to permit easy access to
the test machine specimen support
- The test machine includes a pneumatically
controlled safety plate to protect the operator while working around the
test machine base
- Test machines that satisfy
ASTM E208 and E436 are provided with excess test capacity with energy
levels of up to 4,000 ft-lbs
- Test machines that are
equipped with an instrumented striker have the following additional
features:
- Up to 1,000,000 data points per test
- Data acquisition ranges from microseconds up to 100
milliseconds (longer acquisition times available)
- User friendly software controls acquisition and data analysis
- High speed, 12-bit acquisition board
- Strain gage amplifier
- Instrumented striker
- Hardware/Software manual
- Software
Please
refer to our
Instrumented Impact Testing and
In-Situ Heating & Cooling web pages for further information.
Test
Configuration
Pneumatic Specimen Clamp for
ASTM D3763 Puncture Test |
Striker and Anvils for ASTM E23 Charpy
Test |
Drop Tower with Thermal Conditioning Unit for ASTM E23 Charpy Test |
No Second Strike Device to Prevent More Than One
Impact During Rebound Testing |
The MPM drop tower test machine design can accommodate
various test geometries such as dynamic tensile, Charpy, Izod,
and impact penetration. The test machine base is a solid plate with an
attachment connection that enables the various test specimen configurations to
be quickly and easily set up. The striker tip is a threaded connection to the
rail cart and can be quickly and easily attached. The rail cart allows for
easy addition and removal of weights for energy capacity adjustment.
In addition, special purpose configurations can be
provided. MPM has recently built drop towers to study: printed circuit board
component fracture, explosive material properties, seat belt
buckle shock characteristics, and battery impact fracture resistance.
System Upgrades
Existing test machines can be upgraded by addition of the MPM
state-of-the-art equipment including: instrumented striker systems; impact
velocity measurement systems; in-situ heating and cooling systems; high
velocity launchers; no second strike components; and
automatic rail cart drop height positioning systems. MPM will assemble
the system and provide a field installation and calibration if desired.
Please
refer to our
Refurbished Equipment
web page for information on reconditioned equipment.
Table Top Drop Tower for Miniature
Charpy Testing |
| |
Drop Tower for UN Transportation
Specification Impact Testing |
Back to Top
|
| Search |
Contact Us