Binder Melting Point Gradient for Green Compact Joining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for joining ingot steel materials with green compacts using carbon control and dimension management are complex and difficult to produce, necessitating a simpler technique for assembling multiple parts.
Innovation Solution
A production method involving a three-dimensional shaping apparatus and injection molding machine to form parts with different binder melting points and particle diameters, allowing for assembly, degreasing, and sintering to join the parts effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If carbon amount and dimension are controlled to join ingot steel material with green compact, then joining strength is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies local quality by using different binder types in different regions of the green compact. The binder jetting apparatus selectively deposits a first binder (lower melting point) in the first region that will be joined to the ingot steel material, and a second binder (higher melting point) in the second region. This local differentiation allows the joining process to occur at controlled temperatures without requiring precise carbon content control or complex dimensional management, thereby reducing manufacturing complexity while maintaining joining strength.
2Ease of manufacture
If multiple parts are joined together using simpler method, then ease of manufacture is improved, but joining reliability may worsen
Solution Approach 1:
The patent applies parameter changes by controlling the melting points of the binders used in different regions. The first binder in the first region has a lower melting point than the second binder in the second region. This parameter differentiation ensures that during the heating process, the first binder melts first, facilitating reliable joining between the green compact and ingot steel material, while the second binder maintains structural integrity. This approach simplifies the manufacturing process by eliminating the need for complex carbon control while ensuring joining reliability through controlled binder melting.
3Manufacturing precision
If binder melting point is differentiated in first region and second region, then joining precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies the intermediary principle by using the binder as a mediating substance that facilitates joining between the green compact and ingot steel material. The first binder, with its lower melting point, acts as an intermediary that melts first during heating, creating a liquid state that enables effective bonding. This intermediary approach allows for precise joining control through temperature management rather than requiring complex control of carbon content or dimensional parameters, thereby achieving joining precision without proportionally increasing device complexity.
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 method simplifies the joining process by ensuring a strong bond between parts without gaps, enabling the production of complex shapes and large products with improved strength and efficiency.
Implementation Method 1
a melting point of the binder contained in the first region is lower than a melting point of the binder contained in the second region
Implementation Method 2
a fifth step of heating the assembly at a second temperature higher than the first temperature after the fourth step
Data Source
AI summary
A production method for producing a product by joining a first part containing an inorganic powder and a binder to a second part containing an inorganic powder and a binder is provided. The production method includes a first step of forming the first part by a three-dimensional shaping apparatus, a second step of forming the second part, a third step of assembling the first part and the second part, thereby obtaining an assembly, a fourth step of heating the assembly at a first temperature, and a fifth step of heating the assembly at a second temperature higher than the first temperature after the fourth step, wherein the first part has a first region that comes in contact with the second part and a second region that does not come in contact with the second part, and a melting point of the binder contained in the first region is lower than a melting point of the binder contained in the second region.