Cantilevered Thread Cutting Tooth for Full-Length External Threads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing thread cutting methods and tools face limitations in achieving full thread length and maintaining wall integrity due to collisions with circumferential walls, leading to inferior thread quality and weakened structures.
Innovation Solution
A thread cutting area with a cantilevered front tooth that axially inserts into a clearance between a pin and circumferential wall, allowing for complete thread cutting without collision, ensuring continuous thread formation and maintaining wall integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional threading insert is used to cut external threads at the axial height of the circumferential wall end face, then the threading operation can be completed, but the threading insert collides with the circumferential wall, limiting the maximum effective thread length and potentially weakening the circumferential wall
Solution Approach 1:
The front thread cutting tooth is extended in the axial direction (another dimension) to project beyond the rear support surface. This axial extension allows the cutting tooth to reach into the clearance area and complete threading at the circumferential wall end face without requiring the entire insert to contact the circumferential wall, thus avoiding collision while achieving full thread length
Solution Approach 2:
The front thread cutting tooth is pre-positioned to project axially beyond the rear support surface before the threading operation begins. This preliminary configuration ensures that when threading occurs at the circumferential wall end face, the cutting tooth is already in the correct position to cut without collision, preventing both thread runout and structural damage
2Length of moving object
If the threading insert is designed to reach the circumferential wall end face to complete threading, then full thread length is achieved, but the insert collides with the circumferential wall causing thread runout and inferior thread quality
Solution Approach 1:
By extending the front thread cutting tooth in the axial dimension beyond the rear support surface, the invention enables the cutting action to occur precisely at the circumferential wall end face. This dimensional change allows the thread to be completed cleanly without runout, as the cutting tooth reaches the exact position needed without the insert body interfering
Solution Approach 2:
The threading insert is functionally segmented into a rear support surface that provides stability and a front thread cutting tooth that performs the cutting action. This segmentation allows the cutting tooth to be positioned independently in the axial direction, enabling precise thread completion at the circumferential wall end face without compromising insert stability
3Ease of manufacture
If the circumferential wall is made thinner to create space for the threading insert, then the insert can penetrate to complete threading, but the circumferential wall strength is reduced
Solution Approach 1:
The invention shifts the threading action from a radial penetration approach to an axial extension approach. The front thread cutting tooth projects axially beyond the rear support surface, allowing the cutting action to reach the circumferential wall end face without requiring the insert to penetrate radially through the wall thickness. This maintains wall thickness and strength while achieving threading completeness
Solution Approach 2:
The cutting function is extracted from the main insert body and placed in the front thread cutting tooth that projects axially. This extraction allows the cutting action to occur at the circumferential wall end face without the entire insert needing to contact or penetrate the circumferential wall, thus preserving wall integrity while enabling complete threading
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Use of a thread cutting area (2) for thread production on a component (30) with at least one pin (25) extending axially along a longitudinal axis (28) and a circumferential wall (26) that surrounds the pin (25) circumferentially and radially spaced, so that a clearance (27) is formed between the circumferential wall (26) and the pin (25) and the pin (25) projects axially out of the clearance (27), wherein the thread cutting area (2) has a front thread cutting tooth (3) that cantilevers axially at least in sections for axial insertion into the clearance (27).