Expandable Collet Jig for Accurate Reflection Device Centering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing reflector jigs for laser trackers face challenges with fixed pin diameters, leading to inaccurate centering measurements due to varying hole diameters within tolerance ranges, and lack of self-fixing mechanisms to prevent gravity-induced deviations, especially in large assemblies like aircraft or ships.
Innovation Solution
A jig design featuring a collet with an expandable outer diameter, an expansion pin, and an adjustment screw to securely attach a reflection unit, allowing flexible installation and easy removal, even with varying hole sizes, using magnetic attraction and adjustable components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed pin diameter is used in the reflector jig, then the structure is simple and manufacturing is easy, but measurement precision deteriorates due to clearance errors when hole diameters vary within tolerance ranges
Solution Approach 1:
The patent applies the dynamics principle by making the pin diameter adjustable rather than fixed. The expansion pin can be adjusted to different diameters to match the actual hole diameter, allowing the jig to adapt to variations within the tolerance range. This dynamic adjustment capability resolves the contradiction by enabling precise centering measurements while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent applies the parameter changes principle by allowing the pin diameter parameter to be changed according to the actual hole diameter. The expansion pin's diameter can be modified to compensate for variations in hole diameter within the tolerance range, thereby eliminating clearance errors and improving measurement precision without complicating the manufacturing process.
2Ease of manufacture
If a fixed pin diameter is used in the reflector jig, then manufacturing is easier, but centering accuracy deteriorates due to clearance between pin and hole when hole dimensions vary
Solution Approach 1:
The expansion pin provides dynamic adjustability in diameter, allowing it to be customized for each specific hole within the tolerance range. This ensures that the pin diameter can be optimally matched to the hole diameter, eliminating clearance and achieving accurate centering measurements while keeping the manufacturing process relatively simple.
Solution Approach 2:
The pin diameter parameter is made changeable to match the actual hole diameter. By adjusting the expansion pin's diameter parameter, the system compensates for dimensional variations in holes, thereby achieving high centering accuracy without significantly increasing manufacturing complexity.
3Device complexity
If related art jigs are used without self-fixing function, then the structure is simpler, but reliability deteriorates due to inability to prevent deviation in the direction of gravity
Solution Approach 1:
The patent applies the self-service principle by incorporating a self-fixing mechanism that automatically prevents deviation in the direction of gravity. The magnetic portion and expansion pin work together to provide automatic positioning and fixation, eliminating the need for additional complex anti-gravity measures while ensuring reliable operation.
Solution Approach 2:
The patent applies the anti-weight principle by using magnetic attraction force to counteract the effect of gravity on the reflector. The magnetic portion between the core and locking head generates magnetic force that holds the reflector in place, preventing gravity-induced deviations without adding complex mechanical counterweight structures.
4Ease of operation
If the reflector is attached using a fixed diameter pin, then the attachment process is simpler, but measurement reliability deteriorates due to clearance-induced centering errors
Solution Approach 1:
The expansion pin provides dynamic diameter adjustment capability, allowing the attachment process to be adapted to each specific hole. This ensures accurate centering and eliminates clearance errors, improving measurement reliability while maintaining operational simplicity through the straightforward expansion mechanism.
Solution Approach 2:
The pin diameter parameter is made adjustable to match the actual hole diameter. By changing the expansion pin's diameter parameter, the system achieves accurate centering and reliable measurements without significantly complicating the attachment process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and flexible attachment of reflection devices, reducing measurement errors and facilitating accurate assembly of large structures by ensuring consistent centering and alignment.
Implementation Method 1
The core and the locking head of the collet may be provided with a magnetic portion therebetween.
Data Source
AI summary
A jig for a reflection device includes a collet having a skirt portion with an expandable outer diameter and a locking head on one end of the skirt portion, a sleeve into which the collet is inserted and one side of which is supported by being caught by the locking head, and an expansion pin inserted into the collet and expanding the outer diameter of the skirt portion.