Weighing System Lever Fixing Bolt Aperture Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
During the manufacturing of weighing systems, particularly in the final stages, there is a risk of damage to sensitive joints due to excessive deflections caused by machining and handling forces, which can lead to rejection of the device.
Innovation Solution
A fixing bolt is inserted into aligned apertures in the lever and base before cutting open the material bridges, allowing the bolt to engage positively during this process, thereby preventing excessive lever deflection and joint damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the material bridges are cut open as a final machining step, then the lever can be freed for operation, but considerable lever deflection occurs causing damage risk to joints
Solution Approach 1:
The fixing bolt is inserted into the apertures before cutting open the material bridges, performing a protective action in advance. This preliminary positioning of the fixing bolt prevents excessive lever deflection during the cutting operation, thereby protecting the joints from damage while still allowing the material bridges to be cut open as a final machining step.
2Stability of the object's composition
If the lever is fixed to the base via material bridges during manufacturing, then relative movements are prevented, but the lever cannot be adjusted for scanning sensor system
Solution Approach 1:
The fixing bolt is designed to be axially displaceable in the apertures, allowing dynamic adjustment between a fixed position during manufacturing and an adjustable position for sensor calibration. This dynamic capability enables the lever to be stabilized during manufacturing while still allowing necessary adjustments for the scanning sensor system operation.
3Object-affected harmful factors
If a fixing pin is used to prevent lever movement during transport, then acceleration forces are counteracted, but the pin requires precise positioning in aligned apertures
Solution Approach 1:
The fixing bolt serves as an intermediary element that is inserted into apertures in both the lever and the base. This intermediary component provides a reliable connection that prevents lever movement during transport and counteracts acceleration forces, while the bolt's design accommodates the aperture alignment requirements through its axial displacement capability.
Data Source
AI summary
A method for manufacturing a weighing system (10) includes, first, modeling a blank that includes a base (12) having at least one wall (26) and a lever (20) hinged to the base (12) via thin-section joints (14) and secured to the base (12) via material bridges. The lever (20) has a lever portion adjacent to the wall (26), wherein the wall (26) and the lever portion adjacent to the wall are each provided with an aperture (32, 34), and wherein the apertures (32, 34) are both aligned with each other. The manufacturing method further includes thereafter cutting open the material bridges. Before the material bridges are cut open, however, a fixing bolt (36) is pushed into the apertures (32, 34) in such a way that it engages positively in the apertures (32, 34) during the cutting open of the material bridges.