Curved Chip Discharge Channel in Drilling Tools
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Solution Overview
Problem
Conventional drilling tools lack an efficient mechanism to discharge chips simultaneously with the cutting oil, as in the BTA method, due to their simpler structure and limited ability to handle large oil quantities, resulting in poor chip removal performance.
Innovation Solution
A drilling tool with a hollow discharge channel inside the main body featuring a curved surface that guides chips towards the base end, allowing for efficient chip removal and simultaneous oil discharge, even with general drilling equipment, by applying a force to direct chips during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple drilling tool structure is used, then manufacturing cost is reduced and ease of manufacture is improved, but chip discharging performance deteriorates
Solution Approach 1:
The discharge channel incorporates a curved surface that guides chips toward the base end portion during tool rotation. This curved geometry creates a force component that actively propels chips along the discharge path, enabling efficient chip removal without requiring complex BTA-style apparatus while maintaining simple tool structure
Solution Approach 2:
The discharge channel is designed as a separate hollow structure within the main body, distinct from the cutting insert mounting area. This segmentation allows independent optimization of chip discharge functionality while keeping the overall tool structure simple and easy to manufacture
2Productivity
If cutting oil is fed in large quantity simultaneously with cutting, then chip discharging performance is improved, but device complexity increases
Solution Approach 1:
The discharge channel serves multiple functions: it guides chip discharge, facilitates cutting oil flow, and provides structural support. This multi-functionality allows large quantity cutting oil to be fed simultaneously with cutting to improve chip discharge, while avoiding the need for separate complex BTA apparatus by integrating these functions into a unified tool structure
3Productivity
If a hollow discharge channel with curved surface is added to the main body, then chip discharging performance is improved, but manufacturing complexity increases
Solution Approach 1:
The curved surface within the hollow discharge channel is designed to follow the natural rotation path of the tool, creating a smooth guiding trajectory for chips. This curved geometry generates a force component during rotation that actively propels chips toward the base end, achieving superior chip discharge performance while the hollow structure itself remains a relatively simple geometric form that can be manufactured using conventional techniques
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
This design enhances chip discharging performance and allows for effective oil and chip discharge with standard drilling tools, improving processing efficiency and widening the application range to include low-cost equipment, while maintaining high rigidity and addressing rigidity issues in long drill applications.
Implementation Method 1
a force acting to guide chips in a direction towards the base end portion can be applied by the curved surface of the discharge channel during rotation of the tool
Data Source
AI summary
A drilling tool with improved structure to improve chips discharging performance. The drilling tool comprises a cutting insert 60 having a cutting edge 62 at the front end portion and a main body 10 mounted with the cutting insert 60, further, the drilling tool comprises a hollow discharge channel 12 formed inside the main body 10, and the discharge channel 12 has a curved surface 14 for guiding the chips S in a direction towards the base end portion opposite to the front end portion.