Offset Clamping Boring Head for Stable Roughing
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Solution Overview
Problem
Existing twin-cutter boring heads used for rough machining face stability issues due to the need for additional intermediate parts or adjusting screws, which compromise stability during roughing operations and are costly to produce.
Innovation Solution
A boring head design featuring offset partial clamping surfaces and cutter holders of different heights, allowing for radial adjustment without additional parts and enabling easy conversion between different roughing modes, including rotationally symmetrical and double-offset roughing, through a toothing system that enhances stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If intermediate parts or adjusting screws are used to offset cutters axially, then double-offset roughing is enabled, but stability of the boring head deteriorates
Solution Approach 1:
The clamping surface is segmented into multiple partial clamping surfaces (first and second partial clamping surfaces) at different axial levels. Each partial clamping surface corresponds to a specific cutter holder height, allowing the system to achieve axial offset functionality through the segmented structure rather than adding intermediate parts. This segmentation enables double-offset roughing while maintaining stability by using the tool body's inherent structure.
Solution Approach 2:
The solution transitions from using intermediate parts (adding complexity in the radial dimension) to utilizing axial dimension variations through offset partial clamping surfaces. By implementing clamping surfaces at different axial levels (z-dimension) and corresponding cutter holder height differences, the system achieves axial offset capability inherently, eliminating the need for additional intermediate components and thereby maintaining stability.
2Adaptability or versatility
If intermediate parts or adjusting screws are used for axial offset, then cutter positioning flexibility is improved, but device complexity and production cost increase
Solution Approach 1:
The invention extracts and eliminates the unnecessary intermediate parts and adjusting screws from the system. By designing the tool body with integrated offset partial clamping surfaces and providing cutter holders with adjustable heights, the functionality previously requiring separate components is now achieved through the basic structure itself, reducing part count and simplifying the device.
Solution Approach 2:
The cutter holders are designed with multi-functionality: they can be adjusted to different heights (providing axial offset capability) and can be clamped to different partial clamping surfaces (providing radial adjustment capability). This universal design allows a single cutter holder structure to perform multiple functions that previously required separate components, including rotationally symmetrical roughing and double-offset roughing operations.
3Ease of manufacture
If traditional boring head design is used, then structure is simple, but stability during roughing operations deteriorates
Solution Approach 1:
The tool body features local quality variations through the offset partial clamping surfaces at different axial levels. Rather than making the entire structure complex, only specific localized areas (the clamping surfaces) are positioned at different axial heights to provide the necessary functionality. This localized differentiation maintains overall structural simplicity while enhancing stability during roughing operations.
Data Source
AI summary
The boring head has a tool body (2, 38), to which two cutter holders (3, 4; 22, 23) arranged offset from one another by 180° are fastened. The cutter holders (3, 4; 22, 23) are mounted on a clamping surface (11, 26) in a slidable manner for radially adjusting the cutters (5). The clamping surface (11, 26) has a first partial clamping surface (11a, 26a) for the one cutter holder (3, 4; 22, 23) and a second partial clamping surface (11b, 26b) for the other cutter holder (3, 4; 22, 23). These two partial clamping surfaces (11a, 11b; 26a, 26b) are offset in the axial direction by a certain extent. The two cutter holders (3, 4; 22, 23) have different heights with respect to the cutters (5) in accordance with this extent and in addition can be optionally fastened to and radially adjusted on the first partial clamping surface (11a, 26a) or the second partial clamping surface (11b, 26b). The boring head permits the conventional roughing work and is especially stable while being produced at a low cost.