3D Production Measurement of Camshafts

Camshaft Inspection MachineThe new measuring station MarShaft SCOPE 600 plus 3D provides camshaft measurement completely in 3D for the first time. The combination of optical and tactile probes enables the complete detection of all relevant measuring characteristics, directly in production. The automated measuring procedure greatly accelerates quality assurance.

Every year, over 100 million camshafts are produced worldwide. The cams control the intake and exhaust valves of combustion engines. Camshafts are continually optimized to reduce fuel consumption, pollutants and noise emissions. The exact quality control of workpieces plays an increasingly important role because unrecognized tolerance exceedance often leads to the malfunction of entire assemblies. Manufacturers of camshafts must therefore adhere to 100 percent geometric control.

Mahr, as an application specialist for camshafts, provides a new measurement method with the MarShaft SCOPE 600 plus 3D: The combination of optical and touch sensors and the Mahr measuring software MarWin allows 3D functionality for the first time and thus a complete testing of the camshaft in one clamping.

For precisely this purpose, Mahr further developed the highly successful camshaft measurment station MarShaft SCOPE 750 plus. It now has a new 2D touch probe, a motorized tailstock and a special calibration for linear axes (Z-X-Y). Within a few seconds, the matrix camera optically measures characteristics such as diameters, lengths, radii, shape, contour, location characteristics, cam angle or the cam lift. The additional 2D sensor detects features that cannot be measured optically: concave cam shape, run-outs, reference elements in axial direction and axial holes. The tactile and optical system is calibrated in a coordinate system. The measuring station uses the software platform MarWin; a combination that provides full 3D functionality.

The user has a number of advantages with the new measuring solution MarShaft SCOPE 600 plus 3D. The automated measuring method measures much more quickly and reliably: While the classic coordinate measuring technique requires about 30 to 40 minutes per workpiece, the Mahr measuring station measures a 4 cylinder camshaft in only 5 minutes. In addition, the measuring station can be located directly in production at the processing machine for the respective processing step. The motorized tailstock ensures that the workpieces are always clamped with the same clamping force and the influence of the operator is excluded.

The measuring station MarShaft SCOPE 600 plus 3D is already developed for the networked factory of Industry 4.0. It is possible to load the workpieces by robot and therefore have an inline measurement. The measuring station is networked and sends correction data in closed loop to the machine tool when there are deviating tolerances. As a measuring machine with local intelligence, it has an optional barcode reader with which the workpieces can be detected and then automatically starts the correct measuring program.

The new camshaft measuring station MarShaft SCOPE 600 plus 3D takes on two functions for production plants: it ensures that the crucial features are within the tolerance, increases manufacturing productivity and reduces manufacturing costs.

For more information.