Thread Generating Tool Groove Regions Blind Hole Length
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Solution Overview
Problem
Existing thread generating tools require a run-on cone or cut-starting region for thread generation, which limits the thread length in blind holes and increases tool length, and they often need multiple revolutions for both turning-in and turning-back processes, making them inefficient for small working heights and precise thread positioning.
Innovation Solution
A thread generating tool with groove generating regions that create defined positions for thread generation, allowing thread generating regions to project into these grooves without a run-on cone, enabling complete thread formation in a single revolution and reducing tool length, and featuring thread generating regions that can be cutting or non-cutting, with adjustable thread profiles for varying clamping forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a run-on cone or cut-starting region is used for thread generation, then the tool can engage the workpiece, but the thread length in blind holes is limited and the tool length increases
Solution Approach 1:
The groove generating regions create defined grooves in the workpiece before thread generation begins. These pre-formed grooves serve as guiding paths that eliminate the need for a run-on cone, allowing the thread generating regions to directly engage and form threads from the start position, thereby maximizing thread length in blind holes without requiring additional tool length for a run-on cone structure
Solution Approach 2:
The tool is divided into distinct groove generating regions and thread generating regions that operate in sequence. The groove generating regions first create circumferential grooves that define starting positions, then the thread generating regions form threads within these grooves. This segmentation allows independent optimization of each function, eliminating the need for a run-on cone while maintaining proper thread formation
2Productivity
If multiple revolutions are used for turning-in and turning-back processes, then the tool can generate threads, but the production time increases
Solution Approach 1:
The groove generating regions pre-form circumferential grooves that define the starting positions and paths for thread generation. This preliminary action allows the thread generating regions to begin thread formation immediately without requiring a turning-in process, and the defined grooves guide the tool for efficient single-revolution thread generation, eliminating time-consuming multiple revolution cycles
Solution Approach 2:
The invention skips the traditional multiple-revolution turning-in and turning-back processes by using pre-formed grooves as guiding paths. The thread generating regions can directly engage and complete thread formation in a single revolution by following the predetermined groove paths, significantly reducing the time required for thread generation
3Length of moving object
If the tool length is reduced for small working heights, then the tool is more compact, but precise thread positioning becomes difficult
Solution Approach 1:
The groove generating regions create precisely defined circumferential grooves that serve as reference paths for thread generation. These pre-formed grooves establish accurate starting positions and spacing, enabling precise thread positioning even with a compact tool design, as the grooves provide physical guides that eliminate the need for long tool overhangs or complex positioning mechanisms
Solution Approach 2:
The invention transitions from relying on tool length for positioning accuracy to using the groove dimension as the primary positioning reference. The circumferential grooves created by the groove generating regions provide precise radial and axial references, allowing accurate thread positioning with a shortened tool design that would otherwise compromise positioning precision
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
Enables efficient thread generation in blind holes with reduced tool length, faster thread production, and precise axial positioning, eliminating the need for multiple revolutions and run-on cones, while allowing for customizable thread profiles and clamping forces.
Implementation Method 1
at least one groove generating region for generating a groove in the workpiece
Implementation Method 2
Non-cutting thread generation is based on deformation of the workpiece and generation of the thread flight in the workpiece by pressure
Data Source
AI summary
The thread generating tool for producing a thread in a workpiece has the following features: a) the tool is rotatable about a tool axis (A), b) the tool has a number n≧1 of groove generating regions for generating in each case one groove in the workpiece and a number m≧1 of thread generating regions for generating the thread in the workpiece, c) each of the m thread generating regions is arranged behind one of the n groove generating regions as viewed in an axial projection parallel to the tool axis (A), and has a smaller extent than said groove generating region as viewed in cross section in the axial projection.