The Ultimate Ultrasonic Welding Quiz

Estimated Completion Time
2 min
The Ultimate Ultrasonic Welding Quiz
Image: Photo courtesy Kenneth Straka, New Balance

About This Quiz

Ultrasonic welding is used widely in many industries -- including shoe manufacturing and auto making. How well do you know how this method uses sound to do what high temperatures normally do. Test your knowledge now.
In what decade was ultrasonic welding first introduced?
1930s
1940s
Ultrasonic welding was first introduced in the 1940s.
1950s
1960s

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What materials are most commonly bonded by ultrasonic welding?
metals
plastics
Plastic materials are most commonly and easily bonded together by ultrasonic welding techniques.
textiles
wood

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What force creates the heat in ultrasonic welding?
gravity
friction
The sound waves vibrate the materials. The rubbing makes friction that creates the heat.
electricity
magnetism

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Which part of an ultrasonic welder delivers the sound waves?
converter
horn
The horn focuses the ultrasound vibrations and delivers them to the materials to be welded.
booster
power supply

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How does ultrasonic welding fuse plastic materials together?
Ultrasonic welding does not yet work with plastics.
The heat generated by friction burns the plastics together.
The heat made by friction melts the plastics together.
You must have a "glue" that gets melted to each plastic by the frictional heat.
None of the above

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How does New Balance use ultrasonic welding?
It uses ultrasonic welding to bond materials in shoes soles.
It uses ultrasonic welding to bond and emboss materials.
New Balance uses ultrasonic welding to bond materials with a hot melt film and to emboss materials.
It uses ultrasonic welding to color the shoe soles.
The company doesn't use ultrasonic welding.

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Is ultrasonic welding a high- or low-temperature process?
Ultrasonic welding is a high temperature process.
Ultrasonic welding is a low temperature process.
Ultrasonic welding is a low temperature process.
Ultrasonic welding uses both low and high temperatures.

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What advantages does ultrasonic welding have over traditional welding?
It's fast.
It's cheap.
It's safe.
All of the above.
Ultrasonic welding is fast, cheap and safe.

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What does the booster of an ultrasonic welding apparatus do?
It delivers the sound waves to the materials to be welded.
It amplifies the sound waves.
The booster amplifies the sound waves coming from the transducer.
It creates the sound waves.
It holds the materials together.

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The sonotrode is another name for which part of an ultrasonic welding maching?
converter
horn
Another name for the horn is the sonotrode. It focuses and delivers the sound waves to the materials to be welded.
power supply
booster

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What is the frequency range of sound waves used in ultrasonic welding?
20 - 40 kHz
Most ultrasonic welding machines use frequencies in the range of 20 - 40 kHz.
5 - 10 kHz
50 - 60 Hz
100 - 1000 Hz

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How does ultrasonic welding work with metals?
The heat generated by friction burns away oxides and contaminating materials between the two metals.
The heat made by friction burns away oxides and contaminants from the two metal surfaces. The metals can then bond together.
The heat generated by friction burns the metals together.
You must have a "glue" that gets melted to each metal by the frictional heat.
All of the above.

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What auto maker has experimented with using ultrasonic welding to make aluminum chassis?
Boeing
Ford Motor Company
Ford Motor Company has explored using ultrasonic welding to make aluminum chassis in cars.
Caterpillar
Alcoa

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To make electrical connection, which technique is faster?
Soldering
Ultrasonic welding
Ultrasonic welding is faster than soldering or conventional welding.
Conventional welding

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Which technique would you use to bond two steel girders in constructing a building?
ultrasonic welding
conventional welding
Ultrasonic welding can only produce welds of about a millimeter or so. So, it would not be appropriate for steel girders. Conventional welding would be used.
soldering
gluing

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What is the most likely occupational hazard of ultrasonic welding?
burns
blindness
damaged hearing
Ultrasonic welding can potentially damage your hearing. So, ear protection is commonly used.
cuts

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In an ultrasonic welding machine, what does the transducer do?
It provides the energy for the welding.
It changes electrical pulses to sound waves.
The transducer or converter changes the high frequency electricity into high frequency sound (ultrasound).
It amplifies the sound waves.
It dielivers the sound waves to the material to be welded.

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What factors affect the ultrasonic welding process?
Frequency
Pressure
Time
All of the above
Ultrasonic welding is influenced by the frequency of the sound waves, the pressure used to hold the materials together, and the time of the weld.

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What metals are most commonly welded ultrasonically?
steel and tin
gold and silver
titanium and tungsten
copper and aluminum
Copper and aluminum are the most common metals welded utrasonicaly. Copper wiring and aluminum sheets have been used.

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Besides automobiles, what things are made using ultrasonic welding?
blister packs
catheters
packaging films
all of the above
Ultrasonic welding is used to make medical devices and product packaging.

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You Got:
/20
Photo courtesy Kenneth Straka, New Balance
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