Vertical Turning-Milling Center Direct-Drive Torque Motors
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Solution Overview
Problem
Current machine tools face inefficiencies and precision issues due to the need for repeated clamping and adjustment of cutters during machining operations, inadequate mechanical transmission technologies, and limitations in integrating turning, milling, and drilling functions, leading to reduced production efficiency and accuracy.
Innovation Solution
A vertical turning and milling complex machining center utilizing direct-drive technology with external rotor torque motors for stable and precise operation, allowing for single-clamping machining of complex parts with integrated turning, milling, drilling, and grinding capabilities, including deep cavity machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional mechanical transmission technologies are used with reduction gearboxes and guide screws, then power transmission is achieved, but speed, precision and service life cannot keep pace with modern requirements
Solution Approach 1:
The patent replaces traditional mechanical transmission systems (reduction gearboxes, guide screws, worm gears) with direct-drive technology where motors directly drive the rotating table and milling head without intermediate mechanical transmission elements. This substitution eliminates mechanical wear and backlash, achieving both high speed and high reliability simultaneously.
2Device complexity
If a single ball screw drives the rotating work table, then the structure is simple, but the driving force cannot act upon the gravity center accurately, causing twisting motion and vibration
Solution Approach 1:
The patent divides the single driving force into multiple driving forces by using multiple ball screws (at least two) positioned at different locations on the rotating table. This segmentation allows each ball screw to drive a specific section, with the combined effect producing accurate force application at the gravity center, eliminating twisting motion while maintaining structural simplicity.
Solution Approach 2:
The patent positions the ball screws and their driving forces to counterbalance each other around the gravity center of the rotating table. By strategically arranging the driving forces, the system creates a balanced force distribution that prevents unwanted twisting motions and vibrations, effectively using the driving structure itself to counteract its own harmful effects.
3Adaptability or versatility
If multiple machine tools are used for turning, milling, drilling and boring operations, then functional requirements are met, but repeated positioning and clamping cause time waste and reduce production efficiency
Solution Approach 1:
The patent merges multiple machining functions (turning, milling, drilling, boring, grinding) into a single integrated machine tool system. The rotating table provides turning capability while the programmable milling head with multiple axes provides milling, drilling, and boring functions. This consolidation eliminates the need for repeated workpiece handling between separate machines, dramatically improving productivity while maintaining full machining versatility.
Solution Approach 2:
The patent creates a universal machining center where a single device can perform multiple machining operations through programmable control. The milling head can be programmed to execute various cutting paths and operations, while the rotating table accommodates different workpiece orientations, making the system adaptable to diverse machining requirements without sacrificing production efficiency.
4Ease of operation
If traditional vertical lathe structure is used, then turning function is provided, but milling and drilling functions cannot be performed
Solution Approach 1:
The patent combines the traditional vertical lathe structure with a programmable milling head system. The lathe provides stable turning capability through its rotating table, while the added milling head with multi-axis programming capability introduces milling, drilling, and boring functions. This merger maintains the operational simplicity of the lathe while dramatically expanding functional versatility.
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 enhances production efficiency by 10 times, achieves high precision, and prolongs the service life of machine tools by reducing vibration and mechanical wear, while enabling efficient machining of complex parts with improved accuracy and reduced auxiliary time and errors.
Implementation Method 1
a first external rotor torque motor is disposed at a lower portion of the uniaxial rotating table; the uniaxial rotating table is directly driven by the first external rotor torque motor
Implementation Method 2
two X-axis guide screws, which are respectively disposed at left and right sides of the bed body in an X-axis direction corresponding to the two stand columns
Implementation Method 3
a uniaxial rotating table, which is located between the two X-axis side portion supporting line rails and is driven directly by a first external rotor torque motor at a lower portion thereof; a transverse saddle of the uniaxial rotating table fitly connecting with the two X-axis guide screws
Data Source
AI summary
A vertical turning-milling complex machining center comprises a horizontally-arranged bed body (6) and a vertically-arranged column (7). The bed body (6) is provided with an X-axis lateral supporting linear track (2) and an X-axis guide screw (5). The bed body (6) is also provided with a uniaxial rotating table (1) which can reciprocate and is driven directly by a first external rotor torque motor. The column (7) is vertically provided with a Z-axis lateral supporting linear track (10), a Z-axis guide screw (9) and a crossbeam (11) that reciprocates up and down. The crossbeam (11) is provided with a transverse Y-axis linear track (13), a Y-axis guide screw (12) and a single-pendulum milling head seat frame that can reciprocate along the Y-axis guide screw (12). The single-pendulum milling head is driven directly by a second external rotor torque motor. The vertical turning-milling complex machining center uses direct-drive technology applied to a B-axis and a C-axis, the motor torque is greatly increased and functional parts can stably operate, therefore the integral rigidity and stability of the machining center are improved.