Non-Magnetic Stainless Tapered Tip Forming for Burr Reduction
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Solution Overview
Problem
Existing stainless steel products with fine grain structures do not effectively prevent burr formation during trimming and grinding processes, particularly at tapered tips.
Innovation Solution
A non-magnetic fine stainless steel processed product is developed with a tapered tip formed from a stainless crystal structure with a crystal grain size of 1 µm or less, achieved through warm crushing, which reduces burr formation during processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If stainless steel is processed by conventional cold-rolling and heat-treating to achieve fine grain structure, then the material obtains improved mechanical properties, but the crystal grain size at the tip end part cannot be sufficiently refined to prevent burr formation
Solution Approach 1:
The invention changes the temperature parameter during the forming process by implementing warm forming at temperatures of 100°C or higher. This temperature elevation modifies the material's flow stress and recrystallization behavior, enabling the crystal grain size at the tapered tip to be reduced to 1 μm or less, thereby preventing burr formation during subsequent trimming and grinding operations
Solution Approach 2:
The invention performs preliminary warm forming to refine the crystal grain structure at the tapered tip before the trimming and grinding operations. By pre-refining the grain structure through warm forming, the subsequent cutting and grinding processes generate minimal or no burrs, eliminating the need for additional burr removal operations
2Manufacturing precision
If warm forming is applied to refine crystal grain structure, then burr generation is reduced, but process complexity increases due to temperature control requirements
Solution Approach 1:
The invention utilizes the temperature-dependent material properties to enable grain refinement. By maintaining the forming temperature at 100°C or higher during warm forming, the process achieves crystal grain size reduction to 1 μm or less at the tapered tip, improving manufacturing precision without requiring excessively complex temperature control systems
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 product significantly reduces burr generation during trimming and grinding processes while maintaining excellent corrosion resistance, mechanical properties, and non-magnetic characteristics.
Implementation Method 1
the tapered tip is formed of a stainless crystal structure having a crystal grain size of 1 μm or less
Data Source
Figure 1A~1C
Figure 2
Figure 3
AI summary
A non-magnetic fine stainless steel processed product having a tapered tip formed of a stainless crystal structure having a crystal grain size of 1 µm or less, at a tip end part of a body part formed of fine stainless steel, by a manufacture method including a tapered slope forming step of forming a tapered slope by cutting diagonally fine stainless steel, a tapered tip crush-forming step of forming a tapered tip by subjecting a tip end part of the tapered slope to warm crushing that is performed by keeping the tapered slope at a plastic deformation temperature of 200°C or more and 300°C or less with a temperature variation of 30°C or less, and a tapered tip trimming step of trimming the tapered tip.