Two-Piece Pipe Threading Die With Replaceable Carbide Teeth
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Solution Overview
Problem
Pipe threading dies wear out quickly, especially when threading stainless steel pipes, leading to frequent replacements and increased costs.
Innovation Solution
A two-piece die design with a body portion made of a less expensive material and a tooth portion made of carbide, which can be replaced independently, along with an internal oil passage and chip breaker for improved longevity and lubrication during the threading process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a single-piece die made of hard material is used, then the die life is extended, but the manufacturing cost increases and the die becomes more complex to manufacture
Solution Approach 1:
The die is divided into two separate portions: a body portion made of less expensive material and a tooth portion made of carbide material. The tooth portion can be independently replaced when worn, extending die life without requiring replacement of the entire die assembly. This segmentation resolves the contradiction by allowing the high-wear component to be made of durable material while the bulk structure uses more economical material.
Solution Approach 2:
The die combines two different materials: a cheaper base material for the body portion and carbide material for the tooth portion. This composite approach allows each portion to be optimized for its specific function - the body for structural support and cost-effectiveness, and the teeth for cutting performance and wear resistance - thereby extending die life without uniformly increasing manufacturing costs throughout the entire die.
2Duration of action of moving object
If a two-piece die design with replaceable tooth portion is used, then the die life is extended and manufacturing costs are reduced, but the device complexity increases
Solution Approach 1:
The die is segmented into a body portion and a tooth portion that can be independently manufactured and assembled. This segmentation allows the tooth portion to be replaced without replacing the entire die, extending operational life while keeping the overall device relatively simple through modular construction.
3Productivity
If traditional die design without internal lubrication is used, then the device complexity is low, but the threading operation efficiency decreases and chip management becomes difficult
Solution Approach 1:
The die incorporates an internal oil passage that delivers lubrication directly to the tooth portion during the threading operation. This hydraulic lubrication system reduces friction and heat generation, improving threading efficiency and chip flow. The added complexity of internal oil passages is offset by significant gains in operational efficiency and reduced wear.
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 two-piece die design extends the life of the tooth portion and reduces manufacturing costs, while the internal oil passage and chip breaker enhance the efficiency and smoothness of the pipe threading operation by providing lubrication and effectively managing chips.
Implementation Method 1
an internal oil passage having a first port in the body portion and a second port in the tooth portion. The internal oil passage is configured to provide lubrication to the plurality of teeth during the pipe threading operation.
Implementation Method 2
a chip breaker formed on the rake face of the tooth portion to break off and separate chips from a pipe during the pipe threading operation.
Data Source
AI summary
A die for a pipe threading operation includes a body portion formed of a first material, and a tooth portion coupled to the body portion and formed of a second material that is different than the first material. The tooth portion having a plurality of teeth.