Rotating Prism Laser Head for Precise Cutting With Lower Thermal Impact
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Solution Overview
Problem
Existing machining devices that use laser beams for cutting or boring of workpieces face complexity and size issues when attempting to achieve high precision, leading to a need for a simpler configuration that can maintain or improve machining precision.
Innovation Solution
A machining device with a laser output system, a guiding optical system, and an irradiating head that includes a pair of prisms rotated by a mechanism to adjust the laser beam's path, allowing for high-precision machining with a simpler setup. The device calculates an optimal rotational frequency based on the workpiece's material and conditions to ensure precise irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional laser machining devices use complex optical systems or multiple laser beams to achieve high precision, then machining precision is improved, but device complexity increases
Solution Approach 1:
The patent applies the dynamics principle by rotating the laser beam irradiation position dynamically during machining. The irradiation position rotates around the workpiece center at a controlled rotational frequency, transforming a static laser positioning system into a dynamic one. This dynamic rotation allows the laser to machine circular or annular features while maintaining high precision without requiring complex optical steering mechanisms or multiple laser sources.
Solution Approach 2:
The patent implements periodic action through the rotational movement of the laser irradiation position. The laser beam irradiates the workpiece at periodically changing positions around the center, with the rotation frequency carefully controlled to match the machining requirements. This periodic rotation enables uniform material removal and precise circular feature creation while simplifying the overall device configuration compared to continuous scanning systems.
2Object-affected harmful factors
If conventional laser machining devices increase optical system complexity to reduce thermal influence, then thermal influence is minimized, but device size increases
Solution Approach 1:
By dynamically rotating the laser irradiation position around the workpiece center, the system distributes thermal energy input over a larger area and time period, reducing localized thermal accumulation. This dynamic approach minimizes thermal influence on the workpiece without requiring additional cooling systems or larger optical components, thereby maintaining a compact device size.
Solution Approach 2:
The periodic rotation of the laser beam creates intermittent heating cycles, allowing heat to dissipate between irradiation pulses. This periodic action naturally controls thermal influence by preventing continuous concentrated heating, achieving thermal management through motion rather than through complex thermal control systems or enlarged device architecture.
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 solution enables high-precision machining with a reduced device size and complexity, allowing for efficient and precise cutting or boring operations while minimizing thermal influence on the workpiece.
Implementation Method 1
a first prism that refracts the laser beam
Implementation Method 2
a second prism that is arranged at a position facing the first prism to refract the laser beam
Implementation Method 3
The irradiating head integrally rotates the first prism and the second prism with the rotation mechanism, thereby rotating a light path of the laser beam around a rotational axis of the rotation mechanism
Data Source
AI summary
Provided are a machining device (10), a machining unit, and a machining method that irradiate a workpiece (8) with a laser beam to perform cutting or boring machining of the workpiece (8). The invention has a laser output device (12), a guiding optical system (14) that guides a laser beam, and an irradiating head (16) that guides a laser beam and irradiates the workpiece (8) with the laser beam. The irradiating head (16) integrally rotates a first prism (52) and a second prism (54) with a rotation mechanism, thereby rotating a light path of the laser beam around a rotational axis of the rotation mechanism and irradiating the workpiece (8) while rotating the position of irradiation to the workpiece. A control device (22) calculates an allowable rotational frequency range of the laser beam on the basis of the relationship between an allowable thickness of a remelted layer of the workpiece (8) and a rotational frequency, or the relationship between an allowable thickness of an oxidization layer of the workpiece and the rotational frequency, determines a rotational frequency included in the allowable rotational frequency range as the rotational frequency of the rotation mechanism, and rotates the rotation mechanism at the determined rotational frequency, thereby enabling high-precision machining to be performed with a simple configuration.