Abstract:
There are provided a surface shape measuring method and a surface shape measuring device which can measure the diameter of a workpiece to be measured with high precision and high reproducibility and have excellent versatility. These method include: acquiring first shape data indicating a surface shape of the workpiece with a detector being disposed on one side across a workpiece while rotating the workpiece relatively to the detector around a rotational center; acquiring second shape data indicating the surface shape of the workpiece with the detector being disposed on the other side across the workpiece while rotating the workpiece relatively to the detector around the rotational center; and calculating a shape parameter defining the surface shape of the workpiece by collating the first shape data and second shape data. In calculating the shape parameter, a deviation of the detector from the reference line is calculated based on the collation result.
Abstract:
A roundness measuring device including: an angle detector detecting a current rotation angle of a table relative to an X axis direction; a joystick (external operator) issuing an instruction for an operation amount of a rotation axis line of the table; a centering controller calculating a CX axis displacement amount and a CY axis displacement amount from the operation amount and the rotation angle, and displacing a CX axis displacement mechanism and CY axis displacement mechanism based on the calculated CX axis displacement amount and CY axis displacement amount; and a centering controller calculating an LX axis tilt amount and an LY axis tilt amount from the operation amount and the rotation angle, and displacing an LX axis tilt mechanism and LY axis tilt mechanism based on the calculated LX axis tilt amount and LY axis tilt amount.
Abstract:
A roundness and/or dimension measuring device for in-process measurement of crank pins during a machining operation on a grinding machine having a base body, and a measuring head, which is connected to the base body via a rod assembly and which is movable between a neutral position and a measuring position. The measuring head has a measuring probe for contacting the crank pin, and the rod assembly is designed and configured in such a way that the measuring head in the measuring position follows orbital rotations of the crank pin. At least one oscillation damping element is operatively associated with the measuring head for holding it in engagement with the crank pin during the orbital rotation.
Abstract:
A roundness and/or dimension measuring device for in-process measurement of crank pins during a machining operation on a grinding machine having a base body, and a measuring head, which is connected to the base body via a rod assembly and which is movable between a neutral position and a measuring position. The measuring head has a measuring probe for contacting the crank pin, and the rod assembly is designed and configured in such a way that the measuring head in the measuring position follows orbital rotations of the crank pin. At least one oscillation damping element is operatively associated with the measuring head for holding it in engagement with the crank pin during the orbital rotation.
Abstract:
The invention discloses a method for roundness measurement, which includes the steps of, mounting and rotating an object on a rotary table; driving two measuring surfaces of two measurement units to respectively abut against two opposite sides of the object, wherein the two measurement units are disposed on two opposite sides of the rotary table and the two measuring surfaces are parallel to each other and perpendicular to a to surface of the rotary table; during rotation of the rotary table, measuring intermittently a shortest straight line distance between the two measuring surfaces and generating a variation data and after the rotary table completes a full-circle rotation, a processing unit receiving the variation data and generating measured data. The present invention also discloses a device for roundness measurement.
Abstract:
A roundness measurement device provides a rotation table on a base and measures roundness of a measured object placed on the rotation table while rotating the rotation table, and includes a detecting main body, a detecting device driving mechanism, a stylus, a contact member, and a control device. The detecting device driving mechanism displaces the detecting device main body with respect to the base. The stylus has a base end rotatably supported on the detecting device main body and can change an angle position with respect to the detecting device main body using an external force. The contact member is provided at a position where the stylus comes in contact due to displacement of the detecting device main body by the detecting device driving mechanism. The control device controls driving of the detecting device driving mechanism.
Abstract:
A circular shape characteristic measuring device includes a shape measuring device that obtains measured data by measuring a profile shape of a circular cross-section of an object to be measured having the circular cross-section, and a computation device that calculates a circular shape characteristic of the circular cross-section. The computation device includes: an input device configured to input one of three parameters including a cutoff value of the filtering process, a minimum number of samples, and a ratio of a radius of the circular cross-section to a radius of a gauge head; a parameter table that stores a relationship between the three parameters, and based on the input parameter, determines the other two parameters; and a sampler configured to perform sampling of the measured data based on the minimum number of samples.
Abstract:
According to the present invention, a center deviation amount, which is an amount of deviation (distance) between the center line of a reference measurement target and the detection point is calculated using the reference measurement target having a known diameter, and a measurement value of a diameter of an arbitrary measurement target is corrected using the center deviation amount. Therefore, an accurate diameter value can be calculated even in the case of a measurement target having a diameter value different from the diameter value of the reference measurement target.
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 circular shape characteristic measuring device includes a shape measuring device that obtains measured data by measuring a profile shape of a circular cross-section of an object to be measured having the circular cross-section, and a computation device that calculates a circular shape characteristic of the circular cross-section. The computation device includes: an input device configured to input one of three parameters including a cutoff value of the filtering process, a minimum number of samples, and a ratio of a radius of the circular cross-section to a radius of a gauge head; a parameter table that stores a relationship between the three parameters, and based on the input parameter, determines the other two parameters; and a sampler configured to perform sampling of the measured data based on the minimum number of samples.