Drilling Tool for Titanium Alloy Flat Base Machining
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Solution Overview
Problem
Machining structural components made of titanium alloy is time-consuming due to the need for a two-stage process involving flat drilling and milling, where the initial curved surface geometry from forging requires extensive post-machining to achieve a flat, planar pocket base.
Innovation Solution
A drilling tool with a support and a reversibly exchangeable drilling tip featuring at least two tip cutting edges extending radially from the center, forming two effective cutting teeth, allowing for increased feed rate and quicker machining by forming a flat drill with horizontally running insert cutting edges and an S-shaped cutting edge, enabling faster production of blind holes with a planar base.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional flat drilling tool with cutting inserts arranged in two rows is used, then a flat drilled base can be produced, but the machining time is relatively long
Solution Approach 1:
The drilling tool is divided into multiple cutting inserts arranged in two rows, with each insert having its own cutting edge. This segmentation allows multiple cutting edges to work simultaneously on different portions of the workpiece, increasing the effective cutting width and reducing machining time while maintaining the flat base requirement
Solution Approach 2:
The cutting inserts are arranged in two radial rows offset by approximately 180 degrees, utilizing the radial dimension to distribute cutting edges around the drill perimeter. This dimensional arrangement maximizes the number of active cutting edges without compromising the flat base geometry, thereby improving productivity
2Ease of manufacture
If the cutting inserts are spaced apart in the radial direction to form gaps, then chip removal is facilitated, but the number of effective cutting edges is reduced
Solution Approach 1:
The cutting inserts are spaced apart radially to create gaps that facilitate chip evacuation, while multiple inserts in two rows compensate for the reduced number of continuous cutting edges. Each insert acts as an independent cutting element, maintaining effective cutting capacity despite the gaps
Solution Approach 2:
The cutting inserts serve dual functions: they provide cutting action through their cutting edges and create necessary gaps for chip removal. The same insert components achieve both material removal and chip evacuation, optimizing the tool design for both productivity and ease of manufacture
Data Source
AI summary
A drilling tool for machining structural components made of a titanium alloy includes: a support, which extends along an axis of rotation in the axial direction, the support having an end face with a receptacle disposed centrally therein; a plurality of cutting inserts inserted at the end face in a manner that forms a flat drill, each cutting insert having an active insert cutting edge extending transversely to the axial direction; and a drilling tip disposed in the receptacle and having at least two tip cutting edges, the tip cutting edges extending outward from the axis of rotation and being adjoined in each case by at least one active insert cutting edge.