Miniaturized Bore Deburring Device with Stepped Guide Sleeve
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Solution Overview
Problem
Existing deburring devices for larger bore diameters cannot be miniaturized effectively to accommodate bore diameters of 20 mm or less due to strength issues with reduced components like the compression spring, control bolt, and shaft.
Innovation Solution
A stepped base body design with a guide sleeve of reduced diameter, where the guide sleeve is exchangeable and supported by a control bolt to maintain mechanical strength, allowing for deburring of small bore edges without breaking, and enabling the use of the same blade for varying diameters through an eccentric bore configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the base body diameter is reduced to accommodate small bore diameters, then the device can be used for miniaturized applications, but the mechanical strength of internal components (compression spring, control bolt, shaft) becomes inadequate
Solution Approach 1:
The base body is divided into two distinct segments: a rear portion with larger diameter for housing components and a front portion with reduced diameter for deburring operation. This segmentation allows each part to be optimized for its specific function while maintaining overall structural integrity.
Solution Approach 2:
The guide sleeve is inserted into the longitudinal bore of the base body, creating a nested structure where a smaller-diameter component fits within the larger base body. This nesting allows the device to achieve a reduced external diameter while maintaining internal component strength through the guide sleeve's support structure.
2Volume of moving object
If the guide sleeve diameter is greatly reduced to enable deburring of small bore edges, then the device achieves miniaturization, but the guide sleeve becomes prone to bending and breakage
Solution Approach 1:
The control bolt serves as an intermediary support element that spans across the guide sleeve and engages with the blade assembly. It provides mechanical support to the thin-walled guide sleeve, preventing bending and breakage while allowing the guide sleeve to maintain its reduced diameter for miniaturization.
Solution Approach 2:
The device employs a composite structural approach where the guide sleeve (thin-walled for miniaturization) is combined with the control bolt (for structural support) and the base body (for housing and support). This composite structure allows each component to contribute its strengths while compensating for the weaknesses of individual elements.
3Ease of manufacture
If the base body is designed with constant diameter, then manufacturing is simpler, but the device cannot be effectively miniaturized for small bore applications
Solution Approach 1:
The base body is segmented into two diameter zones: a rear portion with larger diameter for component housing and a front portion with reduced diameter for deburring. This segmentation enables miniaturization at the critical front region while maintaining sufficient size in the rear for component strength, resolving the conflict between manufacturing simplicity and miniaturization requirements.
Data Source
AI summary
Device for deburring bore edges comprising a base body in which at least one recess transversally oriented relative to the longitudinal axis thereof is formed, at least one spring-loaded blade is slidingly displaceable in a longitudinal direction of the recess and a compression spring is disposed in the base body longitudinal bore and is supported by an end of a control bolt whose other end is engaged in a control recess formed in the blade for providing it with a retaining force in a displacement direction. The invention is characterized in that the base body for deburring the bores of a diameter<20 mm, comprises on the front thereof a smaller-diameter guide sleeve which is provided with a longitudinal bore formed therein forming a sliding guide element for guiding the control bolt tip sliding in said bore.