Rotary Screwdriver Simulation with Zero-Angle Brake Alignment
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Solution Overview
Problem
Existing simulation devices for rotary screwdrivers are costly due to high demands on concentricity and manufacturing precision to meet the VDI/VDE 2647 guideline requirements, particularly in maintaining permissible deviations of the largest measured rotation angle with respect to the mean rotation angle.
Innovation Solution
The solution involves aligning the screw joint simulation from a zero angle marked on the measuring disk, ensuring angle-synchronized alignment of rotating parts, and optionally retrofitting existing devices with a zero mark to meet the VDI/VDE 2647 guideline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high concentricity and manufacturing precision are demanded to meet VDI/VDE 2647 guideline requirements, then measurement accuracy is improved, but manufacturing costs increase
Solution Approach 1:
The patent applies preliminary action by aligning the brake unit to a zero angle with respect to a zero mark on the measuring disk before performing measurements. This preliminary alignment ensures that all subsequent measurements start from a consistent reference point, eliminating the need for extremely high manufacturing precision while still achieving the required measurement accuracy according to VDI/VDE 2647 guidelines
Solution Approach 2:
The patent changes the reference parameter from requiring high concentricity of rotating parts to using a defined zero angle reference mark. By shifting from a geometric precision requirement to an angular reference requirement, the system achieves comparable measurement accuracy with lower manufacturing costs
2Measurement precision
If angle-synchronized alignment of rotating parts is implemented, then deviation in measured rotation angle is reduced, but device complexity increases
Solution Approach 1:
The brake unit is preliminarily aligned to a zero angle with respect to a zero mark on the measuring disk before measurements are taken. This preliminary alignment action ensures angle-synchronized measurement conditions without requiring complex real-time alignment mechanisms during operation
Solution Approach 2:
The zero mark on the measuring disk serves as an intermediary reference element that facilitates angle-synchronized alignment. This simple visual marker acts as a mediator between the brake unit and the measurement system, enabling precise angular reference without complex alignment mechanisms
Data Source
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AI summary
The invention relates to a simulation device (1) for the screwdriving simulation of a rotary screwdriver (2); comprising a test connection element (13) and a brake unit (10), which test connection element (13) is rigidly connected to the brake unit (10); which rotary screwdriver (2) can be coupled to the test connection element (13); which rotary screwdriver (2) can be activated; which activated rotary screwdriver (2) exerts a torque on the test connection element (13) coupled to it; which exerted torque rotates the test connection element (13) about an axis of rotation (Z); which brake unit (10) can be activated; which activated brake unit (10) brakes the test connection element (13) rotating about the axis of rotation (Z); comprising a torque transducer (12.3) for measuring the exerted torque; and comprising a rotary angle transducer (12.2) for measuring an angle of rotation by which the test connection element (13) rotates about the axis of rotation (Z); wherein the simulation device (1) has a zero mark (12.12); and wherein the brake unit (10) can be aligned to a zero angle (12.22) with respect to the zero mark (12.12).