Drill Body Recessed Fluid Hole for Insert Mounting and Cooling
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Solution Overview
Problem
Existing drill bodies face difficulties in mounting cutting edge members correctly and effectively supplying cutting fluids to the cutting region due to the presence of flow holes, which compromises the mounting process and fluid distribution.
Innovation Solution
A drill body design featuring a rod-shaped body with a fluid hole that bends along a recessed part at the leading end, providing a non-circular discharge port that aligns with the cutting edge, facilitating easy mounting and efficient fluid distribution, along with a manufacturing method that forms this design using steel materials and 3D printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flow hole is provided inside the drill body to supply cutting fluid to the cutting region, then cutting fluid supply is improved, but it becomes difficult to correctly mount the cutting edge member to the leading end part
Solution Approach 1:
The drill body is divided into functional zones: a mounting part at the leading end part for mounting the cutting edge member, and a body part for fluid supply. The flow hole is specifically positioned in the body part to avoid interfering with the mounting part, enabling both mounting and fluid supply functions to operate independently without conflict.
Solution Approach 2:
Different parts of the drill body are assigned different functions with specific structural characteristics. The mounting part has a flat surface for accurate cutting edge member mounting, while the body part contains the flow hole for cutting fluid supply. This local differentiation allows each part to optimize its specific function without compromising the other.
2Ease of operation
If the cutting region is positioned in front of the leading end part to enable cutting edge member mounting, then mounting capability is improved, but it becomes difficult to supply the cutting region with cutting fluid effectively
Solution Approach 1:
The flow hole is bent in a side part of the recessed part to change the fluid delivery path from a straight axial direction to a curved path that reaches the cutting region positioned in front of the leading end part. This dimensional change in the fluid path allows effective cooling of the cutting edge member while preserving the mounting capability at the leading end part.
3Reliability
If a flow hole is provided inside the drill body, then cutting fluid can be supplied to the cutting region, but the mounting part cannot be designed as prescribed for proper cutting edge member mounting
Solution Approach 1:
The drill body is divided into functional zones: a mounting part at the leading end part for mounting the cutting edge member, and a body part for fluid supply. The flow hole is specifically positioned in the body part to avoid interfering with the mounting part, enabling both mounting and fluid supply functions to operate independently without conflict.
Solution Approach 2:
Different parts of the drill body are assigned different functions with specific structural characteristics. The mounting part has a flat surface for accurate cutting edge member mounting, while the body part contains the flow hole for cutting fluid supply. This local differentiation allows each part to optimize its specific function without compromising the other.
4Ease of manufacture
If the discharge port is made circular, then manufacturing is simpler, but fluid distribution to the cutting edge is insufficient
Solution Approach 1:
The discharge port is designed with a non-circular cross-section having different dimensions in different directions. The first dimension along the major cutting edge is larger to provide effective cooling, while the second dimension perpendicular to it is smaller. This anisotropic design optimizes fluid distribution specifically for the cutting edge geometry, delivering sufficient cooling where needed while remaining manufacturable.
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
Enables correct and efficient mounting of cutting edge members and effective fluid supply to the cutting region, enhancing the drill's operational accuracy and fluid distribution while maintaining structural stiffness.
Implementation Method 1
a fluid hole that causes a fluid to flow inside the body part from a side of the base end part toward a side of the leading end part
Implementation Method 2
an opening portion, of the discharge port, which discharges the fluid to a major cutting edge that forms the cutting edge is a non-circular shape longer in a first direction along the major cutting edge than in a second direction that is perpendicular to the first direction
Data Source
AI summary
A drill body is provided which enables a cutting edge member to be readily correctly mounted to a leading end part of the drill body and which can suitably supply a cutting region with a cutting fluid. The drill body includes: a body part which extends in a rod shape from a base end part toward a leading end part; a fluid hole for causing a fluid to flow inside the body part from a side of the base end part toward a side of the leading end part; and a mounting part which is provided in the leading end part and which is for mounting a removable cutting edge member, wherein the mounting part has a recessed part which is provided along a central axis of the body part from an end surface of the leading end part, and the fluid hole is provided by being bent in a side part of the recessed part so that a discharge port of the fluid hole in the leading end part opposes a cutting edge of the cutting edge member when the cutting edge member is mounted to the mounting part as prescribed.