Automobile

Type of inspection: 

Deter­min­ing the prop­er­ties of insu­la­tion foam sam­ples for aero­space applications.

 

Chal­lenge:

Insu­la­tion foams in pro­pel­lant tanks should, on the one hand, pro­vide ther­mal insu­la­tion and, on the oth­er hand, impede the dif­fu­sion of small mol­e­cules such as hydro­gen as much as pos­si­ble. These prop­er­ties can be achieved with a foam whose poros­i­ty drops radi­al­ly. Inho­mo­geneities and imper­fec­tions are inad­mis­si­ble. Pro­duc­tion is challenging.

 

Pos­si­ble con­se­quences of insuf­fi­cient foam application:

An insuf­fi­cient design of the insu­la­tion foam on the inside of a fuel tank leads to addi­tion­al fuel loss by evap­o­ra­tion or dif­fu­sion. This impedes the launch process of a rocket.

 

Advan­tages of a CT inspection:

  • The three-dimen­sion­al eval­u­a­tion by means of CT enables the slight­est dif­fer­ences in the inter­nal struc­ture of the heat-treat­ed foam to be revealed as a func­tion of dif­fer­ent man­u­fac­tur­ing processes. 
Date:

14. December 2021

Category:

Related projects

Automated inspection of hairpins

Challenge:

The stability of the hairpin joint is crucial for the reliability of electrically powered vehicles. Laser welding can be carried out according to different principles. However, this can affect the quality of the joint by process fluctuations resulting in undesired deviations.

Possible consequences:
Due to ambiguity in the quality of joints, high
failure rates can occur.

Advantages of a CT inspection:

  • Quality feedback within minutes
  • Statistically evaluable results thanks to Microvista's automatic analysis: 40 stators/day inspected
  • Only 165 €/part including an informative report.
CT Scan exposing a burnt out battery
Pore analysis of a cylinder head

Challenge:

In order to achieve the highest possible ranges as well as low emissions, lightweight construction continues to be a primary goal in vehicle construction, regardless of the type of drive. Light metal casting is characterised by its ability to produce complex parts with a high degree of automation and recyclability. However, high technological demands are placed on the components, including mechanical load-bearing capacity under more complex stresses and simultaneous mass reduction.

Potential consequences:

A cylinder with poor quality leads to damage to the cooling system and ultimately to engine failure.

 

Advantages of a CT inspection:

  • Visualisation of pores in the cylinder head and colour classification of the pores according to their volume is possible.
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Testing of wall thicknesses of an exhaust manifold.

Challenge:

The exhaust manifold is one of the most heavily loaded components of an engine. For this reason, the actual and desired condition of the wall thickness should be compared. Only with a sufficient wall thickness can the manifold withstand the shock-like inflow of exhaust gases and the resulting pressure front, as well as the many heating and cooling cycles in the long term.  

Possible consequences of undetected deviations:

The notch effect of blowholes can cause a crack in the manifold. Partial breakthroughs can also occur if the wall thickness is too small. This leads to a change in the pressure conditions in the manifold, which reduces engine performance and, at the same time, increases fuel consumption. In addition, there is a high noise level from the direction of the engine and a clearly perceptible exhaust smell in the interior.

Advantages of a CT inspection:

  • Fast and automatic detection of relevant quality defects 
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CT Scan exposing a burnt pores in aluminium wheel
Assembly inspection of lithium-ion batteries.

Challenge:

Due to production or assembly errors, the contact, insulation and electrolyte foil is damaged in some batteries.

Possible consequences:

A short circuit can be the result. This can lead to a high thermal reaction of the electrolyte. The resulting outgassing causes the battery to swell externally. Inflated, deformed, outgassed lithium-containing batteries can lead to explosions and fires.

Advantages of CT testing:

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CT Scan exposing a burnt out battery
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Challenge:

Additive manufacturing requires carefully set process parameters that are optimised in iterative steps during the product development process. Fast and comprehensive feedback on product quality is of paramount importance for shortening the development phase.

Possible consequences of undetected defects:

Missing and insufficiently validated process quality can result in high reject rates. Especially with regard to safety-relevant parts of the chassis, additional risks arise that can lead to component failure and create the risk of an accident.

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Comprehensive inspection of an aluminium wheel carrier with complex bionic structure.

Challenge:

Additive manufacturing requires carefully set process parameters that are optimised in iterative steps during the product development process. Fast and comprehensive feedback on product quality is of paramount importance for shortening the development phase.

Possible consequences of undetected defects:

Missing and insufficiently validated process quality can result in high reject rates. Especially with regard to safety-relevant parts of the chassis, additional risks arise that can lead to component failure and create the risk of an accident.

Advantages of CT inspection:

  • Shortened development cycles
  • Addressing risks identified by FMEA
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A CT scan of insulation foam
Assembly inspection of medical devices

Challenge:

To detect malfunctions, damage or collisions that cannot be traced after disassembly of the medical device. 

Possible consequences:

Blockages can cause some devices to malfunction during use.

Advantages of a CT scan:
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A CT scan of XXX XXX