Curved Tool Spindle for Vibration-Free Plastic Forming
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Solution Overview
Problem
Existing plastic forming methods using mandrels can transfer vibration to the workpiece surface, resulting in a coarse finish during machining.
Innovation Solution
A machine tool with a tool spindle and work table, equipped with a moving mechanism and motor to control the tool's curved portion to press and rotate relative to the workpiece, ensuring the normal line of the curved portion is oriented towards the surface, allowing smooth machining without transferring vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the mandrel is rotated while pressed on the workpiece surface for plastic forming, then the workpiece surface can be machined, but vibration is transferred to the machined surface causing it to become coarse
Solution Approach 1:
The patent applies dynamics by making the tool spindle rotatable during the plastic forming process. The tool spindle rotates while the curved portion presses on the workpiece surface, allowing the tool to self-align and maintain optimal contact orientation throughout the machining path, thereby reducing vibration and improving surface finish quality
Solution Approach 2:
The patent changes the operational parameters by introducing rotation of the tool spindle as a new degree of freedom. By controlling the rotational speed and orientation of the tool spindle in addition to its linear movement, the system optimizes the contact between the curved portion and workpiece surface, minimizing vibration transfer and achieving smoother machining results
Data Source
AI summary
A machine tool provided with a tool spindle and a work table for supporting a workpiece for plastic forming on a workpiece with a tool attached to the tool spindle. The partially curved tool is has a moving mechanism to move the tool spindle relative to the workpiece, a spindle rotating motor to turn the tool spindle relative to the workpiece, a movement control unit to control the moving mechanism to move the tool along the workpiece while pressing a curved portion on the surface to be machined, and a turn control unit to control the spindle rotating motor to orient a normal line of the curved portion toward the surface of the workpiece at a reference position taken as a reference.