Electric Spindle Rotary Control for Integrated Tool Movement
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Solution Overview
Problem
Existing electrospindles for machining operations in the motor vehicle industry are either specialized and inflexible, or they are cumbersome, expensive, and unsuitable for mass production due to their complexity and weight, and they lack the ability to effectively control integrated tool elements.
Innovation Solution
An electrospindle with a rotary control system that includes a drive shaft connected to an additional motor, allowing for the integration of a tool driver and lubrication system, enabling the control of tool movement and additional mechanical functions like wear compensation without modifying the spindle configuration, using standard electrospindles and maintaining mechanical simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a specialized spindle is developed for a specific machining operation, then the machining precision is improved, but the adaptability deteriorates
Solution Approach 1:
The patent integrates a rotary control system with an additional motor into a standard electrospindle, enabling it to perform both conventional rotation and controlled radial movements. This allows a single spindle to execute multiple machining operations (honin g, turning, wear compensation) that previously required specialized spindles, thereby improving adaptability while maintaining machining precision through the integrated control mechanism.
2Measurement precision
If a tool with electronic control system is used, then the control precision is improved, but the device complexity increases
Solution Approach 1:
The patent combines the rotary control system directly into the electrospindle structure, merging the additional motor and control mechanisms with the existing spindle components. This integration reduces device complexity compared to separate electronic control systems on tools, while maintaining control precision through the unified mechanical-electrical control architecture.
3Measurement precision
If a tool with onboard carriage is used, then the control precision is improved, but the weight increases
Solution Approach 1:
The patent extracts the control function from the tool itself and relocates it to the electrospindle. By placing the additional motor and rotary control system in the spindle rather than on the tool, the tool weight is reduced while the spindle provides the necessary control precision through its integrated mechanisms.
4Adaptability or versatility
If an additional motor is added for spindle ventilation, then the functionality is improved, but the device complexity increases
Solution Approach 1:
The patent demonstrates that adding an additional motor to the electrospindle can serve multiple functions - not only spindle ventilation but also control of integrated tool elements for machining operations. This multi-functional use of the additional motor improves overall system versatility without proportionally increasing complexity, as the same motor structure serves multiple purposes.
Data Source
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AI summary
The invention relates mainly to an electric spindle (10) comprising:- a body (11) in which a motor (12) is mounted, - said motor (12) comprising a stator (13) surrounding a rotor (14) rotationally connected to a hollow shaft (17), said hollow shaft (17) being intended to rotationally drive a tool or a tool holder, characterized in that it further comprises:- a rotary control system (22) for controlling a movement of an element built into said tool or tool holder, said rotary control system (22) comprising an additional motor (23) and a driveshaft (24) passing along inside said hollow shaft (17) of said electric spindle (10), said driveshaft (24) being connected on the one hand to said additional motor (23) and on the other hand to said tool or tool holder so as to allow control of the movement of said inbuilt element.