Cutting Tool Adjusting Mechanism for Run-Out Correction
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Solution Overview
Problem
Existing systems for correcting radial and lateral run-outs in cutting tools, particularly those using hard materials like carbide and diamond, are inadequate as they cannot effectively adjust knife inserts due to the hardness mismatch between the materials and the stone models used for sharpening, leading to inefficiencies in machining hardwood planks.
Innovation Solution
An adjusting mechanism comprising a support member, a deformable member, and an adjustment member that allows for the local deformation of the deformable member to adjust the position of knife inserts relative to the cutting tool, enabling precise alignment and correction of radial and lateral run-outs without the need for grinding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If knife inserts are made of wear-resistant materials like carbide and diamond, then the sharpening frequency decreases and productivity increases, but the stone model is not sufficiently hard to abrade away portions of the knife inserts
Solution Approach 1:
The patent replaces the traditional mechanical sharpening system (stone model abrasion) with a deformation-based adjustment system. The deformable member, when locally deformed by the adjustment member, directly modifies the axial position of knife inserts through mechanical contact, eliminating the need for material removal and enabling adjustment of ultra-hard materials without sharpening.
Solution Approach 2:
The patent changes the physical state of the deformable member from undeformed to locally deformed state, creating axial displacement that adjusts knife insert positions. This parameter change (deformation) provides a new mechanism for adjustment that is independent of the knife insert material hardness, allowing carbide and diamond inserts to be adjusted without traditional sharpening.
2Productivity
If the shaft rotates at high speed, then productivity increases, but radial and lateral run-outs cause variations in cutting depth and machining precision deteriorates
Solution Approach 1:
The patent applies preliminary action by adjusting the knife insert positions using the deformable member and adjustment member before the high-speed cutting operation begins. This pre-adjustment compensates for run-out effects, ensuring that even at high rotation speeds, the cutting depth remains consistent and machining precision is maintained throughout operation.
Solution Approach 2:
The patent applies local quality by creating localized deformation at specific circumferential positions of the deformable member. Each adjustment member deforms the deformable member only at its specific location, allowing independent correction of run-out variations at different positions around the shaft, thereby maintaining uniform cutting depth across all knife inserts during high-speed rotation.
3Ease of repair
If a stone model is used to profile knife inserts, then the cutting tool can be sharpened, but the process is time-consuming and reduces productivity
Solution Approach 1:
The patent replaces the time-consuming stone model abrasion process with an instantaneous deformation-based adjustment system. The adjustment member can locally deform the deformable member to reposition knife inserts in a fraction of the time required for traditional sharpening, thereby maintaining ease of repair while dramatically increasing productivity by eliminating the lengthy grinding 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
This solution allows for accurate machining of hardwood planks by adjusting knife inserts to compensate for run-outs, enhancing productivity by reducing the frequency of sharpening and replacement, and enabling the use of wear-resistant materials like carbide and diamond without the limitations of traditional sharpening methods.
Implementation Method 1
the adjustment member being operable to exert a force on the deformable member to locally deform the deformable member from an undeformed state to a deformed state
Data Source
AI summary
An adjusting mechanism for a cutting tool having knife holders circumferentially interspaced and having a back surface facing a circumferential direction and a seat surface facing a radial direction. The mechanism includes a support member having fixation points securable to the cutting tool. A deformable member is sandwiched between the cutting tool and the support member. The deformable member defines an adjustable lateral reference surface facing an axial direction to be in abutment with the knife inserts. An adjustment member is mounted on one of the support member and the deformable member between the fixation points of the support member. The adjustment member is operable to exert a force on the deformable member to locally deform the deformable member from an undeformed state to a deformed state. An axial distance between the support member and the deformable member is greater in the deformed state than in the undeformed state.