Vacuum Fixture Assembly for Unobstructed Laser Part Retention
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Solution Overview
Problem
In laser processing, particularly laser welding, it is challenging to avoid interference or blocking of the laser beam by components used for part retention, especially when the beam traverses the surface of the part, as traditional methods like air hoses or obstacles can obstruct the path.
Innovation Solution
A system and method utilizing a plate assembly with a pressure chamber and a fixture that creates a vacuum or pressure differential to securely hold parts in place without obstructing the laser beam, using transparent plates and a conduit system to ensure the beam can pass through without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional part retention methods (air hoses, obstacles) are used, then parts can be secured for processing, but the laser beam path is blocked or interfered with
Solution Approach 1:
The patent extracts the part retention function from traditional obstructive methods (air hoses, physical obstacles) and relocates it to a vacuum chamber system. The part is retained within the vacuum chamber environment, separating the retention mechanism from the laser beam path, thereby eliminating blocking while maintaining secure part positioning
Solution Approach 2:
The vacuum chamber acts as an intermediary environment that enables both part retention and laser beam transmission. By creating a vacuum-sealed chamber with transparent windows, the system mediates between the need for secure part holding and the requirement for unobstructed laser access, allowing the laser to pass through the chamber walls without interference
2Object-affected harmful factors
If transparent plates are used to allow laser beam passage, then the laser path is unobstructed, but the structural integrity and vacuum sealing become more complex
Solution Approach 1:
The patent employs composite construction for the plate assembly, combining transparent materials (for laser transmission) with sealing components and structural supports. The assembly integrates multiple materials with different properties - transparent plates for optical access, gaskets for sealing, and framing for structural integrity - creating a unified system that satisfies both optical and mechanical requirements
Solution Approach 2:
The plate assembly is segmented into discrete components: transparent plates, sealing gaskets, mounting frames, and fastening mechanisms. This segmentation allows each component to be optimized for its specific function while simplifying assembly and maintenance. The modular structure makes it easier to replace or adjust individual elements without redesigning the entire system
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 system effectively secures parts for laser processing while allowing the laser beam to traverse freely, ensuring uninterrupted processing and maintaining the integrity of the beam's path, enabling precise and unobstructed laser welding or contouring.
Implementation Method 1
creating a vacuum between the fixture and the part using the pressure chamber
Implementation Method 2
generating a positive or negative pressure within a pressure chamber
Implementation Method 3
the first plate and the second plate may be formed of transparent material. Accordingly, the laser system may direct a laser beam through the first plate and the second plate to reach the part
Data Source
AI summary
A system for laser processing includes a plate assembly having a first plate, a second plate secured to the first plate, and a pressure chamber located between the plates, a connector extending into and in fluid communication with the pressure chamber, and a fixture having a first end attached to the second plate of the plate assembly, a second end having surface having at least one opening and shaped to fit a part to be retained and laser processed, and a conduit extending therethrough in fluid communication with the pressure chamber and the at least one opening. During use, a pressure generated by a pump may be communicated to the conduit of the fixture through the pressure chamber to provide pressure (e.g., a suction effect) at the opening(s) to secure the part in place, e.g., with respect to another part, so they can be laser processed.