Test specimens composed of rod segments for co-ordinate measuring instruments
First Claim
1. A specimen having reference elements constructed as balls and having length-stable rod segments which are connected to one another via the balls, characterized in that the reference elements are detachable mounted on the rod segments and contact surfaces of the rod segments, with respect to the balls, are constructed spherically with the same radius as the balls.
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Accused Products
Abstract
The invention relates to the construction of specimens for coordinate measuring instruments. According to the invention, these consist of touchable reference elements, and rods, in particular of ball-rod structures, balls and rods being held in contact by spring forces, and the contact surfaces of the rods being adapted to the radius of the balls. This construction enables the specimens to be disassembled. It guarantees a high reproducibility of the dimension embodied by the center-to-center distance between the balls in conjunction with ease of disassembly of the complete specimen The advantages are that one-dimensional specimens of very great length can be formed by joining to one another rods and interposed balls, while in the case of two- and three-dimensional specimens the transport volume is substantially reduced. The calibration of the reference object is possible in a simple and accurate fashion via the separate one-dimensional calibration of the segments.
51 Citations
10 Claims
- 1. A specimen having reference elements constructed as balls and having length-stable rod segments which are connected to one another via the balls, characterized in that the reference elements are detachable mounted on the rod segments and contact surfaces of the rod segments, with respect to the balls, are constructed spherically with the same radius as the balls.
Specification