3D Reconfigurable Machining System with Circular Pivot Frame
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Solution Overview
Problem
Current three-dimensional machining systems for large workpieces are complex, expensive, and prone to vibration due to their multi-axis configurations, which limit their ability to smoothly rotate and reconfigure for efficient machining.
Innovation Solution
A three-dimensional reconfigurable machining system featuring a circular pivoting frame with a main spindle that can move in upper/lower/left/right/forward/backward directions, supported by a granite bed with air cushions and linear motors, allowing for smooth rotation and reduced shape deformation during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-axis machining machines are used for three-dimensional machining of large-sized workpieces, then machining capability is improved, but device complexity and cost increase significantly
Solution Approach 1:
The machining system is divided into modular components: a support frame with multiple support units, each containing a spindle unit that can be independently positioned and oriented. This segmentation allows complex 3D machining to be achieved through coordinated simple modules rather than a monolithic complex machine
Solution Approach 2:
The invention adds a vertical dimension to traditional horizontal machining tables by incorporating support units that can move spindles in Z-direction while maintaining X-Y positioning capabilities. This dimensional addition enables 3D machining without requiring multiple interconnected machine axes
2Adaptability or versatility
If vertical support units and horizontal support units are used for tool positioning, then reconfigurability is improved, but machining precision deteriorates due to low rigidity and vibration
Solution Approach 1:
Multiple support units are merged into a single integrated support frame structure, providing both vertical and horizontal positioning capabilities within one rigid framework. This consolidation maintains reconfigurability while eliminating the precision problems of separate cantilevered support units
Solution Approach 2:
The support frame incorporates a circular pivot frame that enables smooth rotational movement of spindles. The curved pivot mechanism allows precise angular positioning without the rigidity losses associated with straight cantilevered support structures
3Ease of operation
If arch-shaped pivoting frames with weight balancers are used, then rotation smoothness is improved, but shape stability deteriorates due to changes in shape during assembly
Solution Approach 1:
Weight balancers are incorporated into the pivot mechanism to counteract gravitational effects on the moving spindles and support units. This allows smooth rotation and repositioning without requiring excessive force, while the counterweights are integrated in a way that does not compromise frame stability
Solution Approach 2:
The circular pivot frame provides a stable curved pathway for spindle movement, maintaining consistent geometric relationships during rotation. The circular geometry ensures uniform distribution of stresses and prevents the shape changes that occur in arch-shaped frames during assembly and operation
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
Enables convenient three-dimensional machining of large workpieces with a simple structure at an economical price, improving rigidity and reducing vibration, while maintaining the spindle's reconfigurability for efficient operation.
Implementation Method 1
An air cushion may be installed at the support
Data Source
AI summary
Disclosed is a 3D reconfigurable machining system including a support frame spaced apart from the ground, a circular pivoting frame pivotably installed at the support frame, a slide member slidably installed on the circumferential portion of the pivoting frame, and a main spindle installed vertically at the slide member and being rotatable along the pivoting frame, so that a workpiece can be three-dimensionally machined with a considerably simple structure.