TASS verification system

Houston, everything is fine!

TASS. The new way to validate tightening technology.

The operating principle of TASS

In a TASS verification, a torsion shaft is driven with the tightening tool, which represents a specific and consistent dimensional embodiment.
During the rotation of this torsion shaft by the tightening tool, two torque values, the angle of rotation between the fixed stops, and the linearity of the torque curve are checked.
The values determined during the verification in the manufacturing plant are compared with values from the calibration of the TASS verification system, and immediate feedback on the result of the verification is provided to the plant control system.

The highlights of the TASS verification system

Time and cost savings: no need to remove the spindle, as the process is automatable and error-free; production stops are eliminated
Minimization of the risk during sensor readjustment, as spindle removal is no longer necessary
Immediate feedback (IO/NIO) through continuous validation

Clear countermeasuring: immediate initiation of measures in the NIO case, process can be carried out as often as desired
Fast troubleshooting possible through short-cycle counter-measurement of the tightening values (e.g. daily)
Reduction of machine capability inspections (MFU): by extending the periods between MFU intervals (usually once a year), costs can be reduced by more than 50%

Our product range for the TASS verification system

TASS Element

consisting of housing and torsion shaft inside
Hirth splines for connecting interchangeable parts

Interchangeable parts

Interchangeable parts serve as a coupling to the tightening system.
Interchangeable parts with standard threads and connection profiles (external hexagon and hexagon socket, Torx)

Interchangeable blanks

The interchangeable blanks can be used to produce suitable connection profiles with the correct tightening geometry for the customized application.

TASS software

The TASS Setup Software is used to determine the system-specific parameter values.
With the TASS Setup software, direct access to the tightening curves and parameter data is possible.

Learn more about the TASS verification system

The Physics Behind TASS

1. The TASS element consists of a fixed housing (1)

2. and a movable torsion shaft (2)

3. The torque increase up to point M1(3) results from overcoming the preload in the torsion shaft.

4. After reaching point M1 (corresponding to the preload of the torsion shaft), the torsion shaft is twisted between the two stop surfaces on the TASS element. This range W3 (4) corresponds to a torsion angle of 12° and is characterized by a linear increase in torque.

5. At point M2 (5), the torsion shaft rests on the second stop surface. In the further course, the housing of the TASS element is twisted. The torque curve is significantly steeper.

6. The test is completed at a moment M3 (6) significantly above M2.

7. By evaluating the measurement results at points M1 and M2 as well as a freely definable envelope curve around the command curve, it is verified whether the test is OK.

TASS verification system catalog

Get the complete overview of the TASS verification system here.

Included in the catalog:

Detailed information on the TASS verification principle
Overview of components and software
Order information for TASS elements and accessories
Dimensional drawings and technical data

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TASS verification system support – resources

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