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Zorluk: KolayThermal Expansion and Contraction

Arrange the following steps in the correct chronological sequence for shrink-fitting a metal collar onto a steel shaft.

  1. 1Heat the metal collar to increase its internal diameter.
  2. 2Slide the heated collar over the shaft.
  3. 3Allow the assembled collar and shaft to cool.
  4. 4The collar contracts and grips the shaft tightly.

Cevap

First heat the collar, then slide it over the shaft, allow the assembly to cool, and finally the collar contracts to create a tight grip.
In a shrink-fitting process, the outer component (the collar) must be heated first so that thermal expansion increases its internal diameter. While it is expanded, it is slid over the inner component (the shaft). As the assembly cools to room temperature, the outer component undergoes thermal contraction, shrinking tightly around the shaft to create a secure mechanical grip.

Adım Adım Çözüm

1
Identify the first step required to make the parts fit together.
Heat the metal collar to increase its internal diameter.
Heating causes thermal expansion, creating the necessary clearance for the shaft.
2
Identify the physical assembly step.
Slide the heated collar over the shaft.
The parts must be assembled quickly while the collar is still expanded.
3
Identify the next phase of the physical process.
Allow the assembled collar and shaft to cool.
Removing the heat source allows the metal to return to its original temperature.
4
Identify the final mechanical outcome.
The collar contracts and grips the shaft tightly.
Thermal contraction shrinks the collar's diameter, creating a strong interference fit.

Anahtar Kavram

Thermal Expansion and Contraction
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Konular

Thermal Expansion and Contraction

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