Threading Tool Chuck With Elastic Torque and Axial Force Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Chucks used in machine tools for threading tools face challenges in minimizing tensile and compressive forces, which can lead to wear and breakage, especially during the reverse rotation phase, and compromise thread surface quality due to torque transmission, while also being difficult to produce and maintain.
Innovation Solution
The chuck design separates the drive and clamping sections with a plastic element that transmits axial forces and torques, allowing for elastic deformation without plastic deformation, and includes an overload device to prevent damage during excessive loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If torque is transmitted through a rigid metal connection between drive section and clamping section, then torque transmission efficiency is improved, but tensile and compressive forces on the threading tool increase during reverse rotation
Solution Approach 1:
The patent changes the mechanical parameter of the connection from rigid to elastic by using an elastomeric material. This allows the connection to deform elastically under load, absorbing reverse rotation forces and preventing them from being transmitted to the threading tool, while still maintaining sufficient torque transmission capability for normal threading operations.
Solution Approach 2:
The patent employs a composite material approach by using an elastomeric material that combines the properties of flexibility (to absorb reverse forces) and sufficient rigidity (to transmit torque). This composite material behavior resolves the contradiction between needing rigid torque transmission and avoiding excessive axial force transmission.
2Ease of manufacture
If a plastic element is used to transmit axial forces and torques, then ease of manufacture is improved, but structural stability under high load may be compromised
Solution Approach 1:
The patent changes the material parameter from traditional metal to elastomeric plastic, which is easier to manufacture through molding processes. The elastomeric material maintains sufficient structural stability by providing elastic deformation capability that absorbs shock loads while maintaining integral strength for torque transmission during normal operation.
Solution Approach 2:
The elastomeric plastic element can be manufactured more economically than precision metal components. While individual plastic elements may have shorter service lives under extreme conditions, the overall system benefits from easier replacement and lower manufacturing costs, aligning with the disposable principle for cost-effective solutions.
3Manufacturing precision
If the threading tool maintains axial ease of movement under torque load, then thread surface quality is improved, but torque transmission contributes to increased tensile and compressive forces
Solution Approach 1:
The elastomeric plastic element acts as an intermediary between the drive section and clamping section. It mediates the torque transmission by deforming elastically, allowing the threading tool to maintain axial ease of movement for high surface quality while absorbing the harmful tensile and compressive forces that would otherwise be transmitted through a rigid connection.
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 design reduces wear and breakage, maintains thread quality, and simplifies production by using a plastic element for force and torque transmission, while the overload device protects against excessive deformation.
Implementation Method 1
transmission of the axial force can be accompanied by compression of the plastic element parallel to an (imaginary) central axis of the plastic element
Implementation Method 2
transmission of torque can be accompanied by torsion of the plastic element around the (imaginary) central axis
Implementation Method 3
The plastic element creates a material area that is more easily deformable compared to the other sections of the chuck, but is nevertheless sufficiently stable to withstand axial forces and torques
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5b
AI summary
The invention relates to a chuck (12) for clamping a threading tool (14) in a machine tool, wherein the chuck has a drive section (18) driven by a machine tool and a clamping section (20) for clamping a shank (26) of the threading tool (14), wherein the chuck extends along a central chuck axis, wherein the drive section and the clamping section are provided separately from each other and are connected to each other by means of at least one plastic element, which is effective for transmitting both axial forces acting parallel to the chuck axis between the drive section and the clamping section and for transmitting torques acting around the chuck axis between the drive section and the clamping section.