Tap Tool Holder Elastic Void Structure for Stress Absorption
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Solution Overview
Problem
Existing tool holders for tapping operations often have complex structures with multiple stress absorbing mechanisms, which can complicate the absorption of stress applied to the cutting edge of a tap, potentially lowering machining accuracy.
Innovation Solution
A tool holder with a simple structure featuring a first elastic part between the shank and tool gripping parts, comprising a plurality of voids that are elastically deformable along the axial and circumferential directions, allowing for effective stress absorption in both directions, and utilizing O-rings to adjust elastic properties for optimal stress management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple stress absorbing mechanisms are provided in the tool holder, then stress absorption capability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple stress absorption functions into a single elastic part that can deform in multiple directions. The first elastic part includes both axial deformation capability (for absorbing thrust stress) and radial deformation capability (for absorbing cutting resistance), merging what would traditionally require separate mechanisms into one integrated component.
Solution Approach 2:
The elastic part is designed to perform multiple functions simultaneously: it absorbs stress in the axial direction, absorbs stress in the radial direction, and provides elastic deformation to maintain gripping force. This multi-functional design eliminates the need for separate stress absorbing mechanisms for different stress directions.
2Device complexity
If a single stress absorbing mechanism is used to absorb stress in both axial directions, then device complexity is reduced, but stress absorption effectiveness may be compromised
Solution Approach 1:
The elastic part is designed with dynamic deformation capabilities, allowing it to deform differently depending on the direction and type of stress applied. The structure includes voids and cavities that enable selective deformation modes - axial compression for thrust stress and radial expansion for cutting resistance - making the single mechanism adaptable to multiple stress conditions.
Solution Approach 2:
The patent modifies the physical parameters of the elastic part by incorporating voids with specific geometries and arrangements. These voids change the effective stiffness and deformation characteristics of the elastic part, enabling it to absorb different types of stress effectively despite being a single component.
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
The tool holder effectively absorbs stress applied during tapping operations with a simple structure, maintaining machining accuracy by appropriately setting elastic properties to manage stress from feed errors and cutting edge interactions.
Implementation Method 1
The first elastic part is configured to be elastically deformable along an axial direction and a circumferential direction
Data Source
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AI summary
A tool holder is provided which is capable of absorbing stress applied to a tool with a simple structure. A stress absorbing mechanism 400 has an elastic part 230 provided in a body 200, a collar 410 arranged on an outer periphery side of the body 200, a support member 420 arranged on an inner periphery side of the body 200, and a position adjusting member 430 threadedly engaged with the support member 420. The elastic part 230 has a plurality of first voids extending along a circumferential direction and a plurality of second voids extending along an axial direction, the first voids and the second voids extend between a body inner peripheral surface 240 and a body outer peripheral surface 250. The collar 410 moves along the axial direction by interlocking with elastic deformation of the elastic part 230 along the axial direction. An O-ring 461 is arranged between a rear end part of the collar 410 and the body outer peripheral surface 250. The support member 420 moves along the axial direction by interlocking with axial movement of a tool 10. An O-ring 462 is arranged between a rear end part of the support member 420 and the body inner peripheral surface 240.