Spring-Loaded Chamfering Tool for Curved and Variable-Thickness Edges
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Solution Overview
Problem
Conventional chamfering methods for cut-out parts of transport vehicle bodyshells, such as railcars, face challenges in achieving precise chamfering shapes due to varying workpiece thickness and requiring complex tool orientation control, especially when the edge to be chamfered extends in a curved manner or varies in direction.
Innovation Solution
A chamfering device with a main body, a movable body, an urging member, and a following member that maintains consistent orientation relative to the workpiece, allowing the chamfering tool to adjust to varying thicknesses and edge directions without needing intricate orientation adjustments, by using a compression spring to displace the tool along the axis and a following member that contacts the workpiece surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual chamfering is performed by a worker using a hand tool, then the worker can finish the chamfering, but highly proficient skills are required and precise chamfering shape is difficult to achieve
Solution Approach 1:
The patent replaces manual mechanical chamfering with an automated chamfering device that includes a chamfering tool mounted on a movable body. The device automatically performs chamfering by moving the tool along the workpiece edge, eliminating the need for highly skilled manual operation while achieving precise chamfering shapes through controlled mechanical movement and positioning systems.
Solution Approach 2:
The chamfering device incorporates a following member with a distal end that contacts the workpiece surface and automatically follows the contour of the workpiece edge. This self-adjusting mechanism allows the tool to adapt to varying workpiece geometries without requiring complex external control or highly skilled operation, achieving precise chamfering through the device's own adaptive capability.
2Adaptability or versatility
If the edge portion extends in a curved manner or varies in direction, then chamfering can be performed on complex geometries, but tool orientation control becomes difficult
Solution Approach 1:
The patent introduces a following member as an intermediary between the tool holder and the chamfering tool. This following member has a distal end that contacts the workpiece surface and automatically follows the contour of the workpiece edge. By using this intermediary, the system can adapt to curved and varying edge geometries without requiring complex orientation control of the entire tool assembly, as the following member absorbs the geometric variations.
Solution Approach 2:
The chamfering device incorporates a movable body that can move in the rotational axis direction, allowing the chamfering tool to dynamically adjust its position along the workpiece edge. This dynamic capability enables the tool to follow curved and varying edge geometries while maintaining proper chamfering orientation, achieving versatility without requiring complex static orientation control mechanisms.
3Adaptability or versatility
If the workpiece thickness varies, then different thickness sections need to be chamfered, but consistent chamfering shape is difficult to achieve
Solution Approach 1:
The following member acts as a feedback mechanism by continuously contacting the workpiece surface and transmitting information about the workpiece geometry to the movable body. As the workpiece thickness varies, the following member automatically adjusts the position of the chamfering tool through the movable body, providing real-time feedback that maintains consistent chamfering shape across different thickness sections without requiring external measurement or control intervention.
Solution Approach 2:
The movable body allows the chamfering tool to dynamically adjust its axial position in response to varying workpiece thickness. This dynamic adjustment capability enables the tool to maintain the correct chamfering geometry regardless of thickness variations, achieving consistent chamfering shapes by adapting to each local section of the workpiece.
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 precise and straightforward chamfering on workpieces with varying thicknesses and edge orientations, ensuring consistent chamfering shapes without requiring difficult tool orientation control, by utilizing a chamfering device that adjusts to thickness variations and maintains tool alignment with the workpiece surface.
Implementation Method 1
an urging member configured to urge the movable body in a direction toward the distal end of the main body
Data Source
AI summary
A chamfering device includes: a main body including, at a proximal end side thereof, a shank to be attached to a main shaft of a machine tool, the main body including, at a distal end side thereof, a shaft portion extending in a rotational axis direction; a movable body whose proximal end portion is mounted to the shaft portion, the movable body being configured to rotate together with the shaft portion and be movable in the rotational axis direction; an urging member configured to urge the movable body in a direction toward the distal end of the main body; a chamfering tool mounted to a distal end portion of the movable body and configured to rotate together with the movable body to perform chamfering on an edge portion of a workpiece; and a following member mounted to the movable body such that a position of the following member relative to the movable body in the rotational axis direction is invariable and the following member is rotatable relative to the movable body, the following member being configured such that a distal end thereof comes into contact with a surface of the workpiece.