Reamer Groove Cutting Edge for Axial Pre-Machining
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Solution Overview
Problem
Existing drilling tools for surface treatment of pre-drilled workpiece core bores require high energy and time due to the need for high-speed axial movement and rotation to remove material from the inner wall.
Innovation Solution
A drilling tool with a groove cutting edge aligned transversely to the longitudinal axis, allowing for a two-step process: pre-machining with a low-speed axial movement to form a groove, followed by finishing with the main cutting edge engaging the groove without axial feed, reducing energy and time consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed rotation and axial movement are used to remove material from the inner wall, then material removal is achieved, but energy consumption and machining time increase significantly
Solution Approach 1:
The cutting edge is segmented into two distinct functional parts: a groove cutting edge for creating axial grooves and a main cutting edge for peripheral material removal. This segmentation allows each part to perform its specific function efficiently, reducing the need for high-speed operation throughout the entire machining process
Solution Approach 2:
The groove cutting edge performs preliminary action by creating axial grooves in the inner wall before the main cutting edge removes the peripheral material. This preliminary groove formation enables the main cutting edge to engage and remove material more efficiently at lower speeds, significantly reducing energy consumption and machining time
2Manufacturing precision
If high-speed rotation with axial feed is used for material removal, then the inner wall is machined, but the process is time-consuming
Solution Approach 1:
The cutting process is segmented into two sequential steps: groove formation by the groove cutting edge followed by peripheral material removal by the main cutting edge. This segmentation eliminates the need for continuous high-speed operation with axial feed, reducing machining time while maintaining surface quality through the dedicated main cutting edge
Solution Approach 2:
The groove cutting edge performs preliminary action by creating axial grooves that facilitate subsequent material removal. This preliminary preparation allows the main cutting edge to remove peripheral material efficiently at low speed without axial feed, significantly reducing machining time while achieving the required surface quality
3Productivity
If the groove cutting edge is added to the drilling tool, then the two-step machining process is enabled, but the tool structure becomes more complex
Solution Approach 1:
The groove cutting edge and main cutting edge are merged into a single integrated cutting tool structure. Both cutting edges are formed on the same tool body, allowing the tool to perform both groove formation and peripheral material removal without requiring tool changes or separate operations, thereby improving machining efficiency while keeping the tool structure relatively simple
Data Source
Figure 1~4
Figure 2
Figure 5~6
AI summary
The invention relates to a boring tool, particularly a reamer, which comprises a clamping shaft (7) and a boring element (9). Between the end face (11) of the boring element and said clamping shaft (7), at least one main blade (13) extends along a boring element longitudinal axis (L) and comprises a blade projection (15) with a rake face (17) facing a groove-shaped chip space (19), and a free surface (21) on the outer circumferential side, these converging at a cutting edge (23) which runs along the boring element longitudinal axis (L) and which removes material on an inner wall (1) of a pre-bored workpiece core bore hole (3) as a result of said boring tool being rotated. According to the invention, the main blade (13) extending along the boring element longitudinal axis (L) passes, at the boring element end face (11), into a groove blade (25) that is aligned transversely to the boring element longitudinal axis (L). This groove blade (25) allows the boring tool to be displaced, prior to removing the material by rotation, into the core bore hole (3) in an axial lifting motion (h) such that a groove (27) is formed which extends along the core bore hole longitudinal axis (L), the main blade (13) of said boring tool engaging in this groove.