Twist Drill Discharge Chute Layout for Spiral Chip Evacuation
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Solution Overview
Problem
Traditional twist drills face issues with chip accumulation and overheating, leading to reduced drilling efficiency and hole quality due to the production of long, flat chips that wind around the bit and the inability to effectively guide out chips, resulting in reduced drilling speed and hole smoothness.
Innovation Solution
The twist drill incorporates vertical and horizontal discharge chutes and a guide chute to facilitate spirally curled chip discharge, preventing long chips from winding and ensuring efficient chip removal, thereby extending the drill's life and improving drilling speed and hole quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional twist bit is used for drilling, then the drilling operation can be performed, but the bit produces much sweeps that are distributed around the drilled hole and are not easy to observe, affecting the use of the bit
Solution Approach 1:
The patent extracts the harmful sweeps from the drilling area by introducing a specialized discharge chute structure that collects and directs sweeps away from the drilled hole and surrounding area, making the drilling situation observable and eliminating the harmful distribution of sweeps
Solution Approach 2:
The discharge chute acts as an intermediary structure between the drilling area and the external environment, capturing sweeps at the source and providing a controlled path for their removal, thus preventing sweeps from dispersing around the drilled hole
2Speed
If a traditional twist bit is used for drilling, then the drilling operation can be performed, but the sweeps produced may enter from the top end of the twist bit due to air flow, which will affect the rotation efficiency of the twist bit
Solution Approach 1:
The patent converts the harmful effect of air flow that would normally carry sweeps into the bit into a beneficial system by designing the discharge chute to utilize air flow patterns for effective sweep removal, transforming the potential harm into a useful mechanism for chip evacuation
Solution Approach 2:
The discharge chute serves as an intermediary structure that intercepts sweeps before they can enter the bit, providing a dedicated pathway for sweep removal that prevents contamination of the bit's rotation system
3Duration of action of moving object
If the twist drill is used for long-term drilling, then drilling operations can continue, but the drill tip wears and overheats, and chips become continuous strips that are not guided out smoothly, reducing drilling speed and hole smoothness
Solution Approach 1:
The patent segments the chip flow path into distinct sections using multiple discharge chutes and guiding structures, breaking up continuous chip strips into manageable segments that can be effectively guided and removed, preventing chip accumulation that would degrade hole smoothness
Solution Approach 2:
The discharge chute and guiding structures act as intermediary elements that facilitate smooth chip transition and removal, preventing direct contact between continuous chip strips and the hole wall, thus maintaining hole smoothness during extended drilling operations
Data Source
AI summary
A twist drill with long life and easy cutting, is provided with a vertical discharge chute on a major cutting edge. The cutting part of the twist drill comprises a major cutting edge, a side cutting edge, discharge chutes and a back chute ridge, the left side of the major cutting edge is provided with the side cutting edge, the discharge chutes comprise a vertical discharge chute and a horizontal discharge chute, the vertical discharge chute is arranged on the major cutting edge, the horizontal discharge chute is arranged on the side cutting edge, the horizontal discharge chute and the vertical discharge chute are interconnected, the fluting angle of the vertical discharge chute is perpendicular to the edge of the back chute ridge, and a horizontal discharge chute is added on the side of the major cutting edge, which is originally provided with a discharge chute at the drill tip.