Spindle Torque Equalization for Backlash-Free Drilling-Milling
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Solution Overview
Problem
Current drilling and milling devices on numerically controlled machine tools face challenges in achieving high cutting performance and surface quality, with limited tool and device lifespan, and existing solutions do not effectively address precision and backlash issues during machining operations.
Innovation Solution
A drilling and milling device with a spindle and drive shaft coupled via a gear, incorporating a device for equalizing torque and rotational speed, utilizing a centrifugal mass and a viscous brake to optimize mass distribution and damping, and featuring a control circuit for real-time adjustments based on sensor data to enhance machining quality and tool lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional drilling and milling device is used on numerically controlled machine tools, then basic machining operations can be performed, but cutting performance and surface quality are limited
Solution Approach 1:
The patent applies dynamics by making the braking torque adjustable during operation. The control circuit allows the braking torque to be varied depending on the machining situation, enabling optimal performance for different cutting conditions and surface quality requirements, thus resolving the contradiction between productivity and manufacturing precision
Solution Approach 2:
The patent changes parameters by introducing an adjustable braking torque that can be modified during operation. The control circuit enables parameter adjustment of the braking force to optimize both cutting performance and surface quality, allowing the system to adapt to different machining requirements
2Duration of action of moving object
If existing drilling and milling devices are used, then machining operations can be completed, but tool lifespan and device service life are limited
Solution Approach 1:
The patent applies preliminary action by preloading the bearing systems through the braking device before machining operations begin. This preliminary preload ensures optimal bearing operation conditions from the start, reducing wear and extending both tool lifespan and device service life
Solution Approach 2:
The control circuit implements feedback by monitoring machining conditions and adjusting the braking torque accordingly. This feedback mechanism helps maintain optimal operating parameters, preventing excessive wear and extending the durability of both tools and the device
3Manufacturing precision
If a drilling and milling device without torque equalization is used, then the structure remains simple, but backlash and precision issues occur during machining
Solution Approach 1:
The patent introduces a braking device as an intermediary element between the drive shaft and the environment. This intermediary component equalizes torque fluctuations and eliminates backlash without requiring complete redesign of the drive system, thus improving precision while limiting complexity increase
Solution Approach 2:
The patent replaces complex mechanical backlash compensation mechanisms with a braking-based torque equalization system. The brake-induced friction provides smooth torque equalization, substituting for more complex mechanical solutions and achieving precision improvement with controlled complexity
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
The solution significantly improves cutting performance, surface quality, and tool lifespan by eliminating backlash and preloading bearing systems, allowing for precise machining and adaptable braking torque, thus enhancing the overall processing quality and service life of the device and tools.
Implementation Method 1
incorporating a device for equalizing torque and rotational speed, utilizing a centrifugal mass and a viscous brake to optimize mass distribution and damping
Implementation Method 2
utilizing a centrifugal mass and a viscous brake to optimize mass distribution and damping
Data Source
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AI summary
The invention relates to a drilling-milling device, which is provided for use in turning centers or machining centers or other numerically controlled machine tools. In order to further improve the machining quality, especially in the case of an interrupted cut, and to further increase the operational life of the tools and the service life of the drilling-milling device, a device is provided for evening out the torque and/or the rotational velocity of the spindle.