Replaceable Cutting Head With Narrow Base Grooves
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Solution Overview
Problem
Replaceable cutting heads with unevenly spaced chip discharge grooves suffer from chip clogging, reduced rigidity, and chattering vibrations during cutting, affecting accuracy and stability, and have manufacturing challenges due to complex structures and material costs.
Innovation Solution
A replaceable cutting head design with a head body featuring a pair of latching faces connected to the base end of a narrower second chip discharge groove, ensuring balanced rigidity and improved chip discharge performance, while maintaining a compact length to reduce manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chip discharge grooves are arranged at unequal intervals with narrow widths, then chip discharge performance improves, but rigidity of the head body decreases
Solution Approach 1:
The patent applies local quality by making different portions of the head body have different properties. Specifically, the circumferential portions at the base end where latching faces are formed are designed with higher rigidity (narrower groove widths) compared to other portions, allowing the structure to maintain overall strength while enabling effective chip discharge in specific locations.
Solution Approach 2:
The patent employs asymmetry by arranging chip discharge grooves at unequal intervals around the circumference of the head body. This asymmetric arrangement allows optimization of chip discharge paths in critical areas while maintaining structural integrity in other regions, resolving the contradiction between chip discharge performance and rigidity.
2Ease of operation
If latching faces are formed by cutting the outer periphery in a planar shape, then attachment and detachment functionality improves, but rigidity of the circumferential portion decreases
Solution Approach 1:
The patent applies local quality by creating a localized reinforcement structure at the base end of the head body where latching faces are formed. This reinforcement compensates for the rigidity reduction caused by the planar cutting of latching faces, allowing the latching function to work effectively while maintaining sufficient structural strength.
3Ease of manufacture
If the head body length is reduced to lower manufacturing cost, then manufacturing cost decreases, but chip discharge grooves may interfere with latching portions
Solution Approach 1:
The patent applies dimensionality change by optimizing the spatial arrangement and angular positioning of chip discharge grooves relative to latching portions. By carefully controlling the circumferential positions and depths of grooves, the design prevents interference between chip discharge paths and latching faces while maintaining a compact head body length, thus reducing manufacturing cost without compromising operational functionality.
Data Source
AI summary
A replaceable cutting head stably rotates a head body using a work tool during attachment. An outer periphery of the head body is provided with a plurality of chip discharge grooves extending along a direction of an axis, cutting blades extending along the chip discharge grooves, and a pair of latching faces that are formed by cutting the outer periphery of the head body and are arranged back to back with the axis interposed therebetween at a base end portion along the axial direction. A first chip discharge groove, and a second chip discharge groove having a narrower width along a circumferential direction around the axis than the first chip discharge groove at at least the base end portion along the direction of the axis are included in the chip discharge grooves. At least one latching face is connected to a base end portion of the second chip discharge groove.