Electron Beam Melting Shielding Case for Thermal Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing electron beam melting and cutting composite 3D printing technologies face challenges due to high temperatures generated during the melting process, which affect other elements in the vacuum chamber and cause stress deformation in structural components during cutting.
Innovation Solution
An electron beam melting and cutting composite 3D printing apparatus is designed with a shielding case to confine the high temperature generated by the electron beam gun, and a cutting structure that allows for precise control of temperature in the cutting area, reducing stress deformation and improving surface accuracy of the machined components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electron beam gun is used to melt metal powder in vacuum chamber, then metal components with forging-like properties can be directly formed, but high temperature is generated which causes heat effect on other elements and stress deformation during cutting
Solution Approach 1:
The vacuum chamber is segmented into distinct functional zones: a melting zone where the electron beam gun operates at high temperature, and a cutting zone maintained at lower temperature. The movable platform enables sequential operation in these zones, isolating the thermal effects to the melting area while protecting the cutting area from excessive heat.
Solution Approach 2:
The movable platform dynamically transitions between positions under the electron beam gun and under the cutting tool. This dynamic positioning allows the workpiece to be selectively exposed to high temperature during melting and to lower temperature during cutting, preventing thermal accumulation and stress deformation.
2Manufacturing precision
If electron beam melting and cutting are performed simultaneously, then surface figure accuracy can directly meet requirements, but temperature variation causes stress deformation
Solution Approach 1:
The system dynamically alternates between melting and cutting operations by moving the platform between zones. This dynamic sequencing allows simultaneous achievement of high surface accuracy through integrated processing while preventing stress deformation by maintaining temperature stability during cutting operations.
Solution Approach 2:
The system performs preliminary melting operations to create the basic component shape, then transitions to cutting operations to achieve final precision. By separating these operations in space and time, the system prevents the temperature variations that would cause stress deformation while still achieving the required surface figure accuracy.
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 apparatus effectively confines the high temperature within the shielding case, minimizing its impact on other elements and maintaining a constant temperature during cutting, thereby reducing stress deformation and enhancing the surface accuracy of the structural components to meet aviation manufacturing standards.
Implementation Method 1
uses a high-power electron beam gun to directly melt the metal powder material
Implementation Method 2
a shielding case is arranged between the emitting head and the Z-direction movable platform... effectively confines the high temperature within the shielding case
Data Source
AI summary
The present application relates to the technical field of 3D printing apparatus, and discloses an electron beam melting and cutting composite 3D printing apparatus which comprises a box and an electron beam gun, in which the box has a cavity formed therein, the cavity is provided therein with a cutting structure, a first Y-direction guide rail and a Y-direction movable platform, the electron beam gun has an emitting head formed in the cavity, the Y-direction movable platform is provided thereon with a Z-direction movable platform, the Z-direction movable platform is provided thereon with a powder spreading structure, the cutting structure has a cutting head, a shielding case is arranged between the emitting head and the Z-direction movable platform, the emitting head of the electron beam gun is inserted in an upper opening of the shielding case, and a lower opening of the shielding case is aligned with the Z-direction movable platform.