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US 10,775,162 B2Granted
Pneumatic plug gauge and measuring system
AssigneeRobert Bosch GmbH
InventorsAndreas Schruefer, Christoph Schmidtlein, Herbert Beck, Johannes Weickmann
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AssigneeRobert Bosch GmbH
InventorsAndreas Schruefer, Christoph Schmidtlein, Herbert Beck, Johannes Weickmann
Estimating the term…
A pneumatic plug gauge has been developed in the context of the invention. This plug gauge comprises a first measuring channel which can be connected to a pressure medium source and opens into a first outlet for the pressure medium, which outlet can be directed to a surface of the workpiece to be tested. According to the invention, this plug gauge is designed to determine the tilt angle between a section on the surface thereof and a region opposite this section on the surface of the workpiece by virtue of the first outlet being arranged at one end of the section and at least one second outlet being provided, which second outlet is arranged at the other end of the section. It has been recognized that the admittedly high precision of pneumatic length measurements can be converted in a particularly advantageous manner to high precision of the angle measurement in this manner. The tilt angle can be measured at least with an accuracy of less than one tenth of a degree. At the same time, the measurement is fast enough for 100% control in mass production. The plug gauge is the central element in the measuring system and in the method, to which the invention likewise relates.
A pneumatic plug gauge (M), comprising:
A method for pneumatically determining a tilt angle (αβ) between a path (A) in space and a region (1b, 2b, B) on a surface of a workpiece to be checked (3) opposite said path (A) with a pneumatic, rotation symmetrical plug gauge (M), wherein the plug gauge is rotation symmetrical about an axis of rotation and has a circular cross-section perpendicular to the axis of rotation, and wherein said plug gauge (M) comprises at least one measurement channel (1, 2) that is subjected to a pressure medium by means of a choked output (7c, 7d) of a pressure medium source (7a, 7b) and that opens at an outlet (1a, 2a) that is directed towards the surface of the workpiece (3), and wherein the plug gauge is of a conical form, at least in a region in which the path (A) runs between the outlet (1a, 2a) and at least one second outlet (1a, 2a), the method comprising:
Dependencies are inferred from the claim text.