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Shim Determination & Verification

The process of assembling a high-speed gearbox normally requires the determination and verification of the correct shims for the assembly in order to prevent any issue that may lead to noise or incorrect functioning of the transmission.

The Xive shim assembly process is mainly performed either for adjusting the preload of a set of tapered bearings or adjusting the backlash of a couple of mating gears.

When it comes to electrified transmissions, that are subject to several challenges and requirements, the integration of a measuring system to make the above-mentioned operations becomes essential.

Shim determination and verification
DESCRIPTION

The application is normally composed of two measuring stations for the determination of the shims and one final station to verify that the shims mounted into the gearbox are correct.

The first measuring station (manual or automatic) determines on the gearbox cover, by the use of a static measurement, the distances from the center of the bearing caps to the face where the shims are to be located. The second measuring station instead is to determine, by means of a dynamic cycle with preload, the symmetrical distances on the housing.

The difference between the two distance measurements is used to X the shims for the assembly. The shims are normally stored and divided into different classes and an automatic system guides the operator in the Xion of the correct shims to be mounted.

Once the shims are mounted and the gearbox bolted, a final verification machine is used to check the operating torque.

The capacity of Marposs’ system of making this verification process fully automated (considerable reduction in terms of cycle time of the line) as well as the suitability for customization depending on the actual production process represents an undeniable benefit for the customer.  

BENEFITS
  • Effective in lowering the risk of incorrect assemblies
  • Capability for both manual and automatic loading
  • Capacity to integrate other instruments (laser marker, cameras etc.)
  • Robust construction
  • Easy to maintain thanks to the easy accessibility to its components
TECH SPECS
  • Manual or automatic solution
  • High reliability
  • Preload applied 20 N
  • Cycle time depending on the specific application requirements
VERSIONS
  • Fully automatic machine suitable for automatic loading/unloading by robot for in-line measurement
  • Manual loading machine for off-line measurement
  • Inclusive of shim storage and manual verification station
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