Deep Hole Drill Segmented Cutter for Chip Breakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Deep-hole drills face limitations in increasing production speed due to chip accumulation in the chip removal groove, especially with tough materials, where longer chips fail to break and get stuck, leading to tool damage and workpiece destruction.
Innovation Solution
The deep-hole drill incorporates a chip splitter with strategically arranged partial cutting edges that collide and break chips into smaller, narrower pieces, ensuring effective removal even at higher feed rates, using a chip splitter implemented as a groove or step, with a clearance angle optimized for the material being drilled.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the production speed is increased, then the manufacturing efficiency is improved, but chip accumulation occurs in the chip removal groove
Solution Approach 1:
The cutting edge is divided into multiple partial cutting edges (at least two) that are arranged to produce separate chip streams. This segmentation allows chips to be divided into narrower sections that can be effectively removed from the chip removal groove even at high production speeds, preventing chip accumulation while maintaining high productivity.
2Productivity
If the feed rate is increased, then the manufacturing speed is improved, but chip length increases and chips get stuck
Solution Approach 1:
The cutting edge is segmented into multiple partial cutting edges that create separate chip sections. This segmentation breaks up long chips into shorter, manageable sections that can be effectively evacuated from the chip removal groove even at high feed rates, preventing chip entanglement and tool damage.
3Shape
If conventional chip dividers are used, then chip width is reduced, but chip length remains considerable and accumulation occurs
Solution Approach 1:
The cutting edge is divided into multiple partial cutting edges arranged to create both narrow and short chips. This dual segmentation approach addresses both chip width and length, ensuring chips are small enough to be effectively removed from the chip removal groove without accumulation.
Solution Approach 2:
The partial cutting edges are arranged with specific orientations and angles to create localized chip flow patterns. By optimizing the local geometry and arrangement of partial cutting edges, the chip flow is directed to collide and break, creating optimally sized chips for removal while maintaining high production speeds.
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 allows for significantly higher feed rates, achieving production speeds more than three times faster than conventional drills, ensuring reliable chip removal and preventing drill breakage, thus enhancing process reliability and reducing manufacturing costs in industrial series production.
Implementation Method 1
The collision of the chips produced during machining causes stresses to be introduced into the chips, which leads to the chips breaking
Implementation Method 2
coolant, which is fed through internal channels via the spindle, and rotated by the spindle about the center axis of the drill. At the same time, the tool is moved towards the workpiece along its central axis with a defined feed rate per revolution. The deep-hole drill penetrates the workpiece and the material of the workpiece is chipped off at its cutting edges and separated from the workpiece in the form of chips. The resulting chips are cooled by a coolant
Implementation Method 3
The resulting chips are cooled by a coolant, which is fed through internal channels via the spindle
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a deep hole drill comprising at least one cutter (S), which is formed on a drill head and which has at least one cutting edge, the at least one cutter being divided into at least two sub-cutters (T1, T2) by at least one chip divider (ST) for dividing the chips removed by the cutting edge, the deep hole drill being characterized in that the sub-cutters (T1, T2) of at least one cutter are arranged relative to each other in such a way that the cutter normals (N1, N2) of at least two sub-cutters (T1, T2) are aligned at an angle of at least 20° to each other.