Integrated Chamfering Mandrel for Simultaneous Pipe Cutting
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Solution Overview
Problem
Existing methods for cutting tubes, particularly those made of synthetic materials, result in internal burrs and tool wear due to the interaction with cutting mandrels, leading to complex and costly machining processes for achieving smooth finishes.
Innovation Solution
An internal chamfering device integrated with the cutting mandrel, utilizing a slide-guided chamfering tool that moves transversely during the cutting operation to produce simultaneous internal and external chamfers without additional machining steps or tool movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a cutting mandrel made of synthetic material is used, then internal burrs are reduced, but the mandrel develops markings and grooves after repeated cuts
Solution Approach 1:
The patent combines the cutting operation with an internal chamfering operation by integrating a chamfering tool into the cutting mandrel. The chamfering tool is activated during the cutting stroke to simultaneously chamfer the internal surface while the cutting knife cuts the tube, eliminating the need for separate chamfering operations and preventing burr formation without compromising mandrel surface quality.
Solution Approach 2:
The chamfering tool operates continuously during the cutting stroke, performing both cutting and chamfering actions in one continuous motion. This eliminates idle time between operations and ensures that the internal surface is chamfered throughout the entire cutting process, preventing burr formation consistently.
2Strength
If a cutting mandrel made of treated steel is used, then structural strength is improved, but the cutting tool edge wears out quickly
Solution Approach 1:
The patent merges the cutting function with the chamfering function in a single integrated operation. The chamfering tool, integrated into the mandrel, performs internal chamfering while the cutting knife makes the external cut, reducing the workload on the cutting edge and minimizing wear from repeated contact with the hard steel mandrel surface.
3Manufacturing precision
If separate chamfering operations are performed, then internal surface quality is improved, but production complexity and cost increase
Solution Approach 1:
The patent combines multiple operations (cutting and internal chamfering) into a single integrated device and process. The chamfering tool is mounted on the cutting mandrel and operates simultaneously with the cutting knife, eliminating the need for separate chamfering machines or operations and significantly reducing production complexity.
Solution Approach 2:
The cutting mandrel is designed with multi-functionality, serving both as a support for the tube during cutting and as a carrier for the chamfering tool. This universal device performs both cutting and internal chamfering functions, eliminating the need for separate specialized equipment.
4Manufacturing precision
If multiple machining steps are used for internal chamfering, then production precision is improved, but production time and cost increase
Solution Approach 1:
The chamfering tool operates continuously during the cutting stroke, performing chamfering action throughout the entire cutting process. This continuous operation eliminates the need for separate intermittent chamfering steps, maintaining high precision while maximizing production speed.
Solution Approach 2:
The patent merges cutting and chamfering operations into a single simultaneous process. Both operations are performed in one stroke without interruption, eliminating the time required for separate machining steps while maintaining the precision quality of internal chamfers.
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 high-quality internal chamfers during the cutting process without requiring separate machining operations, reducing production costs and eliminating burr formation, while allowing for simultaneous production of interior and exterior chamfers.
Implementation Method 1
movable in the latter, against the action of at least one return spring, by means of the cutting knife
Data Source
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AI summary
The device has a slide (9) carrying a chamfering tool (10) and housed in a cutter mandrel (3) supporting a tube to be chamfered (4) in a transversal chamfering plane. The slide is guided in transversal displacement with respect to a longitudinal axis of the mandrel. The slide is displaced in the mandrel against action of a return spring (11) by a cutting tool (1) during the end of chamfering operation. The tool (10) simultaneously connects an interior chamfer on a section of a cut tube and on an end of the tube to be chamfered located on the mandrel.