Rotating Tool Stop Shoulder with Stepped Axial Positioning
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Solution Overview
Problem
Existing rotary tools, such as countersinks, drills, and peeling tools, face challenges in easily adjustable and reproducible positioning of stop elements to define the maximum penetration depth of cutting edges, especially when dealing with non-rectilinear cutting edges.
Innovation Solution
The tool features a base body with multiple support surfaces arranged in a staircase fashion, allowing the stop element to be positioned at various axial positions using a grub screw, which interacts with steps and support surfaces to fix the stop element, enabling precise axial positioning of the stop shoulder, even at contour transitions of cutting edges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stop element is used to define maximum penetration depth, then the penetration depth can be controlled, but the adjustment of stop element position is difficult and not reproducible
Solution Approach 1:
The base body is divided into multiple axial positions with distinct support surfaces and steps. The stop element can be positioned at discrete axial locations corresponding to different support surfaces, enabling reproducible penetration depth control while maintaining ease of adjustment through simple axial placement.
Solution Approach 2:
The support surfaces and steps are pre-formed on the base body at predetermined axial positions. This preliminary structuring allows the stop element to be easily positioned and fixed at these pre-defined locations, combining precise penetration depth control with simple adjustment operation.
2Adaptability or versatility
If the cutting edge is non-rectilinear (contoured), then versatile cutting capabilities are achieved, but positioning the stop element at contour transitions becomes difficult
Solution Approach 1:
Different support surfaces are positioned at specific axial locations corresponding to contour transitions of the cutting edge. Each support surface provides localized positioning precision at critical points along the contoured cutting edge, enabling accurate stop element placement despite the complex geometry.
Solution Approach 2:
The positioning problem is shifted from the radial dimension (contour transitions) to the axial dimension (support surfaces). By providing multiple axial positioning references, the system enables precise stop element placement at contour transitions without being constrained by the complexity of the radial geometry.
3Adaptability or versatility
If multiple adjustable positions are provided, then adaptability is improved, but the device complexity increases
Solution Approach 1:
Multiple positioning functions are merged into a single integrated base body structure. The support surfaces and steps are combined features formed directly on the base body, eliminating the need for separate adjustment mechanisms and reducing overall device complexity while providing multiple adjustable positions.
Data Source
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AI summary
The invention relates to a tool rotatable about an axis (A) with a base body (1) having a working section (3) and a stop element (2) with a stop shoulder (7), which can be positioned at a predetermined axial position. A plurality of support surfaces (12.2, 12.3, 12.4) of the base body (1), arranged one behind the other in the direction of the axis (A) and separated from one another by steps (13.1, 13.2, 13.3, 13.4), and a retaining element (8) of the stop element (2), which in the axial positions is supported on one of the steps (13.1, 13.2, 13.3, 13.4) and the support surfaces (12.2, 12.3, 12.4), are provided.