Rotating Chip Shield With Dual Deflectors for Bidirectional Cutting
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Solution Overview
Problem
Existing chip shielding devices for machining units with vertical spindle axes are ineffective in intercepting chips ejected in all directions, particularly when the tool rotates, leading to environmental pollution and potential operator injuries due to incomplete chip capture.
Innovation Solution
A chip shielding device with a circular member and dual deflectors, each with a concave inner surface and curved ramp, positioned to intercept chips during both rotation directions, and actuated to translate along the vertical axis, ensuring comprehensive chip capture regardless of tool rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed deflector is used to intercept chips, then the structure is simple and stable, but it can only intercept chips ejected in specific directions, leaving chips to escape into the environment
Solution Approach 1:
The patent employs a mobile deflector that can rotate about a vertical axis, transforming the static fixed deflector into a dynamic structure. This mobile deflector follows the tool during machining and can be positioned to intercept chips regardless of the tool's rotation direction, thereby resolving the contradiction between structural simplicity and adaptability to various chip ejection directions
Solution Approach 2:
The deflector is divided into a mobile portion and a fixed portion, with the mobile portion capable of independent rotation. This segmentation allows the mobile deflector to adapt to different chip ejection directions while the fixed portion provides structural stability, effectively addressing the contradiction between reliability and versatility
2Adaptability or versatility
If a mobile deflector follows the tool during machining, then it can adapt to tool movement, but it fails to intercept chips when the tool rotates in the opposite direction due to unfavorable concavity positioning
Solution Approach 1:
The mobile deflector is designed to rotate about a vertical axis, allowing it to dynamically adjust its orientation. When the tool rotates in either direction, the mobile deflector can be positioned with its concave surface facing the chip ejection direction, ensuring reliable chip interception while maintaining adaptability to tool movement
Solution Approach 2:
The system employs actuators to periodically adjust the position of the mobile deflector, ensuring that the concave surface is always favorably positioned relative to the chip ejection direction. This periodic adjustment mechanism maintains reliable chip interception effectiveness while the deflector follows the tool's periodic movements during machining
3Productivity
If high rotation speeds of the tool are used to increase productivity, then machining efficiency improves, but chip dispersion and environmental pollution increase
Solution Approach 1:
The mobile deflector dynamically follows the tool at high rotation speeds, maintaining optimal positioning to intercept chips regardless of the tool's speed or rotation direction. This dynamic adaptation ensures that even at high productivity levels, chip dispersion is minimized and environmental pollution is reduced
Solution Approach 2:
The system incorporates aspirators that use pneumatic suction to capture chips inside the protection structure. This pneumatic mechanism effectively contains and conveys chips generated during high-speed machining, preventing their dispersion into the environment and reducing pollution while maintaining high productivity
Data Source
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AI summary
The present invention relates to a chips shielding device (D) couplable with a tools holder head provided with at least one tool (U) for working wood workpieces and the like, capable of rotating in a first rotation direction (A) and in a second rotation direction (B) opposite to the first one, said device (D) comprising: at least one circular member (1) capable of surrounding, at least partially, said tool (U), comprising a fixed portion (11) and a mobile portion (12), slidably rotatably coupled with said fixed portion (11), at least one deflector means (4) coupled with said mobile portion (12), said device (D) being characterized in that said at least one deflector mean (4) comprising a first part (4a), configured so as to contact the chips coming from the working of said tool (U) according to said first rotation direction (A) and a second part (4b) configured so as to contact the chips coming from the working of said tool (U) according to said second rotation direction (B). The present invention also relates to a machine comprising a chips shielding device (D), which can be coupled to a tool holder head.