Hose Cutting Device Tensile Stress Dynamics
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Solution Overview
Problem
Existing methods for cutting high-pressure hose material with steel wire inserts result in significant material wear and reduced saw blade lifespan due to compression and clamping effects during the cutting process, leading to increased heat generation and difficulty in cutting.
Innovation Solution
The method involves increasing tensile stresses along the axis of the tube during severing, allowing the hose section between contact elements to be pulled apart, reducing compressive stresses and enabling the cutting agent to work laterally without contact, thus minimizing material wear and extending the lifespan of cutting tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the hose material is bent and pretensioned over contact elements during cutting, then the cutting process can be performed on high-pressure hose material with steel wire inserts, but the bent hose material is compressed in the area of its inner radius causing a clamping effect on the saw blade
Solution Approach 1:
The support plate is designed to be movable rather than stationary, allowing it to follow the motion of the hose material during cutting. This dynamic adjustment prevents the hose from being compressed against a fixed surface, eliminating the clamping effect while maintaining the ability to cut high-pressure hose material with steel wire inserts
Solution Approach 2:
The support structure is divided into a stationary support rail and a movable support plate. The movable support plate can independently adjust its position to match the hose material's movement, separating the functions of support and cutting while preventing harmful compression effects
2Force
If the bending is amplified during the cutting operation, then the tensile stress is increased to sever the tubing, but the compression in the area of the inner bending radius increases causing a clamping and frictional effect on the separating means
Solution Approach 1:
The movable support plate dynamically follows the hose material's motion during amplified bending, preventing the hose from compressing against a stationary surface. This eliminates the frictional and clamping effects that would otherwise occur on the separating means while allowing the tensile stress to be effectively increased for severing the tubing
3Reliability
If the hose material is held by stationary contact elements, then the hose sections outside the contact elements remain fixed, but the hose material is compressed against the stationary abutment causing material wear and reduced saw blade lifespan
Solution Approach 1:
The support plate is designed to move together with the hose material during the cutting process, preventing compression against stationary surfaces. This eliminates the material wear and heat generation that would otherwise occur, extending the service life of the saw blade while maintaining fixation stability through the movable support mechanism
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 approach reduces material wear, extends the life of cutting tools, and ensures an abrasion-free cutting surface perpendicular to the hose axis, enhancing operational reliability and ease of further processing.
Implementation Method 1
The hose material is bent and pretensioned over contact elements lying on both sides of the cutting plane and then severed by generating a tensile stress in the pretensioned position
Implementation Method 2
the tubing material being bent and pretensioned over contact elements lying on both sides of the cutting plane and then severed by generating a tensile stress in the pretensioned position
Data Source
Figure 1~2
AI summary
The method involves bending tubing (2) by attachment units that lie at sides of a cutting plane (18) and pre-stressing the tubing. The tubing is cut by producing tensile stress in a pre-stressed position, where the tensile stress is increased during cutting process. The tubing is fixed in its attachment areas against position modification in the pre-stressed position. The forces (K) opposite to the cutting movement are discharged in the tubing during a cutting process in such a manner that a kerf that is formed during cutting of the tubing is expanded during the cutting process. An independent claim is also included for a device for cutting tubing.