Dual-Edge Deburring Tool for Transverse Recesses in Boreholes
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Solution Overview
Problem
Existing deburring tools are ineffective in deburring transverse recesses intersecting a main borehole due to cutting edges not being angled correctly, leading to chatter marks and increased labor as edges must be deburred in alternating passes, and previous designs are unsuitable for continuous cutting, resulting in incomplete burr removal and potential knife breakage.
Innovation Solution
A deburring tool with two cutting edges opposite in rotation, set at a slant between 0° and 90°, configured as continuous arch-shaped cutting surfaces that perform simultaneous paring cuts on both sides of the transverse recess during both rightward and leftward passes, allowing for efficient removal of burrs from the main borehole without clearance angles or segmented segments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cutting edges are arranged perpendicular to the main borehole axis, then the tool structure is simple, but deburring quality deteriorates due to impact motion producing chatter marks
Solution Approach 1:
The cutting edge is configured as a convex arc-shaped surface instead of a straight line, allowing it to engage the transverse recess edge in a sweeping paring motion that eliminates chatter marks while maintaining structural simplicity
2Manufacturing precision
If cutting edges are set at a slant angle, then deburring quality improves through paring cutting, but the tool requires more complex geometry
Solution Approach 1:
The convex arc-shaped cutting edge inherently provides the slant angle effect through its curvature, eliminating the need for separate angled cutting surfaces while achieving paring cutting action
3Manufacturing precision
If deburring is performed in alternating rightward and leftward passes, then both edges can be addressed, but labor expenditure increases
Solution Approach 1:
The tool combines two cutting edges on opposite sides of the convex arc, both of which are active simultaneously during a single rotational pass, merging the function of what would otherwise require separate rightward and leftward passes
4Ease of manufacture
If conventional cutter shapes are used, then the tool is easier to manufacture, but knife breakage occurs during deburring
Solution Approach 1:
The convex arc-shaped cutting edge distributes cutting forces along a curved path, preventing concentrated impact loads that cause knife breakage, while remaining manufacturable through standard forming processes
Data Source
AI summary
A deburring tool (7) for deburring of edges of transverse recesses (3, 3a-i), which diverge from a main borehole (2), consisting of a shaft (8, 9) driven to turn about the tool axis (11), which is deployable and retractable in the forward feed direction into the main borehole, and on the lower end of which at least one knife window (26) is arranged, in which at least one spring-loaded knife (10, 10′, 10″, 10′″, 10″″) is arranged roughly perpendicular to the tool axis (11), so as to be shiftable, which on its front end has at least one cutting edge (10a, 10b) which encounters the edge of the transverse recess (3, 3a-i), and deburrs same, wherein the knife (10, 10′, 10″, 10′″, 10″″) consists of two cutting edges (10a, 10b) opposite in the rotational direction (12, 13), which act to cut equally for the right and left passes (12, 13), with one cutting edge (10a) being configured to cut for the rightward pass (12), both in forward motion (38a) and in rearward motion, and the other cutting edge (10b), being configured to cut for the leftward pass (13), both in forward motion (38a) and in rearward motion, and that the two cutters (10a, 10b) with their cutting edges are placed at a slant and with arch shape at an angle between 0° and 90°, but preferably between 5° and 45° to the tool axis (11) and thus to the longitudinal axis (2a) of the main borehole (2).