Prismatic Receiver Aligns Rotational Body for Hardness Testing
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Solution Overview
Problem
Existing methods for positioning and aligning rotationally-symmetrical bodies, such as shafts, with respect to measuring devices are not precise enough, leading to measurement errors due to variations in diameter, especially during hardness measurements.
Innovation Solution
A device with a prismatic receiver and a positioning element that allows for defined movement relative to a contact surface, ensuring the rotationally-symmetrical body is fixed and aligned independently of its diameter, using a through-bore for the pin and a guiding mechanism to maintain a consistent measuring point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measurement prism is used to fix the position of the rotationally-symmetrical body, then the body can be positioned with respect to the measurement prism, but the measuring point on the body varies depending on the diameter of the body
Solution Approach 1:
A positioning element with a prismatic receiver is introduced as an intermediary between the rotationally-symmetrical body and the basic element. The prismatic receiver engages with the body's outer surface while the positioning element moves relative to the basic element, mediating the positioning function to achieve both fixation and diameter independence
Solution Approach 2:
The positioning element is designed to be movable relative to the basic element along a defined movement path. This dynamic capability allows the positioning element to adapt to different body diameters while maintaining precise positioning through the prismatic receiver's geometric constraints
2Ease of operation
If the rotationally-symmetrical body is supported on the contact surface, then the body can be positioned, but the alignment with respect to the indenter cannot be achieved with high repeat accuracy
Solution Approach 1:
The positioning element acts as an intermediary that translates the simple support function into precise alignment. By moving the positioning element along a defined path relative to the basic element, the system achieves both ease of operation and high alignment accuracy at the measuring point
3Productivity
If the indenter penetrates the body surface, then hardness measurement can be performed, but measurement errors occur due to misalignment at the highest or lowest point
Solution Approach 1:
The positioning element is preliminarily positioned and aligned before the hardness measurement is performed. The prismatic receiver ensures that the measuring point is correctly located on the rotationally-symmetrical body prior to indenter penetration, eliminating alignment errors that would otherwise occur during measurement
Data Source
AI summary
The invention relates to a device to position and align a rotationally-symmetrical body (28) with respect to a measuring device (19) for the implementation of a measurement on the rotationally-symmetrical body (28), having a basic element (24) which has a contact surface (22) on a pin (23) or is allocated to a contact surface (22) on which the rotationally-symmetrical body (28) is supported for the implementation of the measurement, wherein a positioning element (41) which can be moved relative to the contact surface (22) is provided on the basic element (24), said positioning element (41) comprising a prismatic receiver (64), wherein the contact surface (22) is positioned within the prismatic receiver (64) or abuts on this and a movement path of the positioning element (41) towards the basic element (22) corresponds at least to the height of the prismatic receiver (64).