Portable 5-DOF Parallel Module for Large-Part Five-Face Machining
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Solution Overview
Problem
Traditional machining devices face challenges in efficiently machining large and complex components due to limited workspace and movement stroke, leading to reduced usage rate and production efficiency, as they often require multiple workpiece mounting and machining setups.
Innovation Solution
A portable 5-DOF parallel module is integrated with a CNC rotary table and sliding table, enabling simultaneous workpiece mounting and machining at different stations, with a closed-loop parallel structure and screw-nut pairs for flexible five-axis motion and increased swing angle range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional serial kinematic mechanism is used for machining, then the device complexity is reduced, but the machining precision and rigidity deteriorate
Solution Approach 1:
The patent uses a parallel kinematic mechanism that replicates the advantages of fixed machining systems while maintaining portability. The parallel structure copies the rigidity and precision benefits of traditional machining centers but delivers them through a mobile platform, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The patent replaces the traditional serial mechanical transmission system with a parallel kinematic mechanism driven by electrical actuators. This substitution eliminates geometric error accumulation inherent in serial mechanisms while maintaining structural simplicity through modular design.
2Manufacturing precision
If a parallel kinematic mechanism is used to achieve five-axis motion, then the machining precision and rigidity are improved, but the workspace and movement stroke are reduced
Solution Approach 1:
The patent segments the machining system into a mobile parallel mechanism unit and a stationary workpiece support. This allows the parallel mechanism to maintain its precision advantages while the segmented design enables extended workspace through coordinated movement of the mobile unit across multiple workpiece positions.
Solution Approach 2:
The patent adds the dimension of mobile platform movement to the five-axis parallel mechanism. By combining the five-axis capability with the ability to reposition the entire module across the workpiece, the system achieves both high precision and large effective workspace.
3Device complexity
If workpieces are mounted and machined at the same position sequentially, then the device complexity is reduced, but the productivity and usage rate are reduced
Solution Approach 1:
The patent enables continuous useful action by allowing the mobile machining module to work on one workpiece while another workpiece is being prepared or mounted at a different location. The module moves continuously between workpieces without idle time, eliminating the sequential stop-start operation of traditional systems.
Solution Approach 2:
The system implements self-service through automated workpiece handling and positioning. The mobile module can autonomously move between workpieces and adjust its position, reducing the need for manual intervention and enabling parallel preparation and machining operations.
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
This configuration enhances the machining of large and complex components, improves production efficiency, and increases the usage rate by allowing simultaneous mounting and machining, thereby overcoming the limitations of traditional machining devices.
Implementation Method 1
a first chain, a second chain, a third chain, a fourth chain and a fifth chain for connecting the portable frame with the spindle to achieve five-axis motion
Data Source
AI summary
The present invention discloses an machining device based on a portable 5-DOF parallel module. The machining device based on a portable 5-DOF parallel module comprises: a table for moving a parallel module to increase the stroke of the machine tool such that the machine tool can machine large components and can also simultaneously conduct the mounting and the machining of workpieces at different stations; a CNC rotary table; and a portable 5-DOF parallel module. The portable parallel module has a large swing angle range, can conduct the conversion between vertical and horizontal machining modes and can achieve five-face machining in one setup in cooperation with the CNC rotary table. The parallel module can move flexibly, and can machine large and complex components after mounted on the sliding table. After the machining of the workpiece is completed, the parallel module can move to the position of a mounted component through the table to conduct the machining of the next component. Thus, the mounting and the machining of the workpiece are simultaneously conducted at different stations, and the utilization rate and the production efficiency of the portable parallel module are improved.