Tactile measurement
-
Points of Contact
- News
- Downloads
- Dates
- Contact
Tactile measurement
Roughness- and contour measurement
The tracing system describes surfaces using metrology. A roughness measurementusing contact stylus instruments involves moving a stylus tip made from diamondover the surface of a specimen (workpiece) at a constant speed. The measurementprofile is derived from the vertical position shift of the stylus tip, which isusually recorded by a distance measurement system. When a surface is describedusing metrology, standardized roughness parameters are obtained from themeasurement profile.
The simultaneous measurement of roughness and contourcharacteristics on curved or inclined surfaces calls for a measuring system withboth a high resolution and a broad measuring range. An opto-mechanical measuringsystem transfers mechanical measurement onto an optical gauge, thus combiningthe benefits of contact measurement with the efficiency of opticalmetrology.
Form measurement
Once machined, each workpiece exhibits varying degrees of deviation from thegeometrically ideal form. Even the slightest deviation from the reference formcan significantly affect a component's functionality.
Form and positiondeviation on all components plays an important role, especially for the smoothinteraction of several workpieces with common functions.
Form deviationmeasurements provide information on the quality of the finished components andenable conclusions to be drawn on the quality of the overall production process,thereby helping to reduce costs.
A new generation of scanning systemscombines the form and position tolerance measurement with the roughnessmeasurement - without the probe arm needing to be changed. The ruby ball ordiamond tip is used depending on the measuring task concerned. In either case,the scanning system automatically sets the correct probe force.
Products roughness- and contour measurement
Products form measurement
Tactile, dimensional measurement
Wear-resistant, dirt-repellant carbide measuring probes are generally usedfor dimensional, tactile metrology.
The transducers for the 1-dimensionalgeometric characteristics that you want to measure for a workpiece are normallyinductive or digital measuring probes.
In multipoint metrology, the 1-dimensional geometric characteristics in agauge fixture are recorded simultaneously at several points of a workpiece,using a number of measuring probes.
Modular systems are often used, which canbe adapted to the specific measuring task by combining individual components.
Very common for example are multipoint gauge fixtures for shaft-typeworkpieces with a horizontal clamping position.
External evaluation systemsor connected measuring computers are used to evaluate the measured values andlink several measuring points, and they are also used for visualization.
These multipoint gauge fixtures are robust for use in production. They aresimple to operate, and the measurement result is returned within a few seconds.As such, they are a proven measuring solution for long-term massproduction.
However, this equipment can only be used for specific workpiecefamilies, and it has limited conversion options.
Highly-specialized and modularized multipoint metrology solutions are used intactile 100% final inspections of workpieces on the production line.
Thesefinal inspection systems usually measure dimensions and form and positionparameters.
Tactile measuring probes and measuring heads are used in in-process metrologyas transducers for complex measuring control systems, for example, in grindingand fine machining.
These tactile measuring heads are specially designed foruse in the finishing area of the machine tools.