Abstract: Measuring device, in particular for in-process measurement of test pieces during a machining operation on a machine tool, in particular a grinding machine, has a measuring head which is movable relative to a base body of the measuring device between a neutral position and a measuring position in which the measuring head is in measuring contact with the test piece. At least one angle sensor is associated with the measuring head for detecting the angular position of the measuring head, in particular changes in the angular position of the measuring head relative to the test piece, during a measuring operation.

Abstract: A device for imaging an inner surface of a cavity in a workpiece includes optics with a panoramic view, and has an image transmission connection with an image sensor and a downstream evaluation device. The device also has an illumination system with a light source for illuminating an imaging region of the inner surface imaged by the optics. Further, at least one light-emitting and/or light-deflecting component of the illumination system is provided on a lens, such as in particular a front lens, of the optics.

Abstract: Method for determining a twist structure in the surface roughness of a workpiece which is cylindrical at least in part includes that multiple sampling segments which extend in the axial direction of the workpiece and which are mutually spaced apart in the circumferential direction are carried out in a surface region of interest on the workpiece, and the value of at least one parameter of the twist structure is determined based on the measured values obtained using the sampling segments. An estimated value of at least one parameter of the twist structure is determined based on the measured values associated with a first sampling segment, the estimated value being corrected based on the measured values associated with at least one second sampling segment.

Abstract: Method for measuring the shape of a workpiece includes a measuring sensor used to find measured values that represent the shape of a workpiece. The shape of the workpiece is determined by an iterative method using the measured values. The shape of the workpiece is determined during machining. The determining of the shape during machining is particularly suited for determining the shape during grinding. The shape determined may be the shape of a pin, especially a crankpin for a crankshaft.

Abstract: A measuring head of a pneumatic measuring device for measuring a workpiece has a base element in which a first flow channel is provided for connecting a compressed air source to a measuring nozzle. The first flow channel has a constricted area with at least one cross-sectional constriction. The measuring head also has one or more second flow channels for connecting the constricted area to a measuring transducer. The base element has a divided configuration in the axial direction. The divided configuration may be provided at least in the constricted area of the first flow channel.

Abstract: In a crankshaft testing method for the classification testing of at least one bearing surface of a crankshaft or the like, a reflection of a reference object at the bearing surface to be tested (reflection image) is detected by at least one sensor, using a sensor system. The detected reflection image is evaluated with regard to its contrast, and the crankshaft is classified as “unsatisfactory” when the contrast is below a predefined or predefinable threshold value.

Abstract: A device for imaging an inner surface of a cavity in a workpiece includes optics with a panoramic view, and has an image transmission connection with an image sensor and a downstream evaluation device. The device also has an illumination system with a light source for illuminating an imaging region of the inner surface imaged by the optics. Further, at least one light-emitting and/or light-deflecting component of the illumination system is provided on a lens, such as in particular a front lens, of the optics.

Abstract: A measuring device includes a base body, and a measuring head which is movable between a rest position and a measuring position. The measuring device also includes an apparatus for moving the measuring head from the rest position into the measuring position, and a stop for limiting the motion of the measuring head from the rest position into the measuring position. A motorized drive unit for adjusting the position of the stop is operatively associated with the stop in such a way that the measuring position is adjustable, and a control unit is provided for activating the drive unit.

Abstract: Measuring device for in-process measurement of test specimens during a machining process on a machine tool, in particular a grinding machine, has a measuring head connected pivotably about a first pivot axis to a base body of the measuring device via a linkage, for providing an apparatus for pivoting measuring head in and out of a measuring position. Linkage has a first linkage element and a second linkage element arranged pivotably about first pivot axis. A third linkage element is connected pivotably about a second pivot axis to the end of second linkage element facing away from first pivot axis. A fourth linkage element is connected pivotably about a third pivot axis to the end of third linkage element facing away from second pivot axis, fourth linkage element being connected pivotably about a fourth pivot axis to first linkage element at a distance from third pivot axis.

Abstract: An apparatus for imaging the inner surface of a cavity in a workpiece has an optical system including a panoramic field of view that is linked to an imager and a downstream evaluation device by an image communication link. The apparatus furthermore has an illumination system including a light source to illuminate an imaging region of the inner surface, which region has been captured by the optical system. According to the invention, the illumination system is disposed in such a way relative to optical system, and for which the beam path is selected in such a way, that a first axial section of the imaging region is able to be illuminated under brightfield illumination, while simultaneously a second axial region spaced apart from the first axial region is able to be illuminated under darkfield illumination.

Abstract: In a crankshaft testing method for the classification testing of at least one bearing surface of a crankshaft or the like, a reflection of a reference object at the bearing surface to be tested (reflection image) is detected by at least one sensor, using a sensor system. The detected reflection image is evaluated with regard to its contrast, and the crankshaft is classified as “unsatisfactory” when the contrast is below a predefined or predefinable threshold value.

Abstract: Measuring device, in particular for in-process measurement of test pieces during a machining operation on a machine tool, in particular a grinding machine, has a measuring head which is movable relative to a base body of the measuring device between a neutral position and a measuring position in which the measuring head is in measuring contact with the test piece. At least one angle sensor is associated with the measuring head for detecting the angular position of the measuring head, in particular changes in the angular position of the measuring head relative to the test piece, during a measuring operation.

Abstract: Method for determining a twist structure in the surface roughness of a workpiece which is cylindrical at least in part includes that multiple sampling segments which extend in the axial direction of the workpiece and which are mutually spaced apart in the circumferential direction are carried out in a surface region of interest on the workpiece, and the value of at least one parameter of the twist structure is determined based on the measured values obtained using the sampling segments. An estimated value of at least one parameter of the twist structure is determined based on the measured values associated with a first sampling segment, the estimated value being corrected based on the measured values associated with at least one second sampling segment.

Abstract: A measuring device includes a base body, and a measuring head which is movable between a rest position and a measuring position. The measuring device also includes an apparatus for moving the measuring head from the rest position into the measuring position, and a stop for limiting the motion of the measuring head from the rest position into the measuring position. A motorized drive unit for adjusting the position of the stop is operatively associated with the stop in such a way that the measuring position is adjustable, and a control unit is provided for activating the drive unit.