Gas-Expanded Pipe Forming for Hard-Material Protrusion Precision
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Solution Overview
Problem
Existing forming apparatuses are limited in their ability to precisely form pipes with protrusions from hard materials like iron, as they require soft materials such as aluminum alloys for accurate precision, restricting their applicability to various forming materials.
Innovation Solution
A forming apparatus that utilizes a plurality of dies with a moving mechanism and a gas supply unit to expand and shape the forming material into a pipe with protrusions, allowing for the formation of pipes with protrusions regardless of the material's hardness, by controlling the movement of dies and gas supply to define a forming space where the material is expanded and pressed against forming surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional extrusion apparatus is used, then soft materials like aluminum alloys can be formed with good precision, but hard materials like iron cannot be formed accurately
Solution Approach 1:
The forming apparatus divides the forming process into multiple stages using a plurality of dies (first die, second die, third die) that can be independently positioned and controlled. Each die can apply forming force to different regions of the tube at different times, enabling precise control over the forming sequence and pressure distribution, which allows accurate forming of hard materials that cannot be formed by traditional single-stage extrusion
Solution Approach 2:
The apparatus employs movable dies with independent driving mechanisms that can dynamically adjust their positions and applying forces during the forming process. The first, second, and third dies can move along the tube axis and apply forming forces at different stages, enabling adaptive control of the forming process to accommodate hard materials while maintaining precision
2Adaptability or versatility
If gas supply is used to expand the forming material, then hard materials can be formed, but control of the forming process becomes more complex
Solution Approach 1:
The apparatus introduces gas as an intermediary medium between the movable dies and the tube interior. The gas supply unit injects gas into the tube to generate internal expansion pressure that works in conjunction with the external forming forces from the dies. This intermediary gas pressure helps distribute the forming load and enables the formation of hard materials without requiring excessively complex mechanical pressing systems
Solution Approach 2:
The forming apparatus utilizes pneumatic principles by supplying gas to the tube interior to generate expansion pressure during the forming process. The gas pressure acts as a controllable force that complements the mechanical forming action of the dies, enabling the formation of hard materials while maintaining process control through gas flow regulation
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 the easy formation of pipes with protrusions across different material types, including hard materials like iron, by expanding and shaping the material within the defined forming space, thus overcoming the precision limitations of existing technologies.
Implementation Method 1
a gas supply unit that supplies gas to a forming material which is a base of the pipe with protrusions to expand the forming material
Data Source
AI summary
A forming apparatus includes: an upper die and a lower die having forming surfaces corresponding to outer surfaces of a pipe with protrusions; a moving mechanism that moves the upper die and the lower die such that a forming space for forming the pipe with protrusions is defined between the forming surfaces of the upper die and the lower die; and a gas supply unit that supplies gas to a forming material to expand the forming material. A control unit controls the movement of the upper die and the lower die by the moving mechanism and the supply of gas to the forming material by the gas supply unit such that the forming material is formed into the pipe with protrusions in the forming space.