Articulated Arm Machine Tool for Precise Multi-Axis Machining
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-speed machine tools with traditional kinematic structures requiring multiple linear axes are costly and complex, limiting precision and flexibility, especially when multiple machining operations are needed, as they require significant investment and are not efficient in reducing positioning uncertainty.
Innovation Solution
A machine tool with an articulated structure comprising two pivoting arms that moves an electric spindle in a plane perpendicular to its axis, reducing the number of displacement axes and implementing a self-guided slide, allowing for flexible positioning and maintenance, with a workpiece support module that includes rotary axes for orientation, and equipped with encoders and cycloidal reducers for precision and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a traditional kinematic structure with multiple linear axes is used, then machining precision and speed can be achieved, but the device complexity and cost increase significantly
Solution Approach 1:
The machine tool structure is segmented into distinct functional modules: a fixed bed, a movable plate with workpiece support module, and an articulated structure with two arms. This segmentation allows each module to be optimized independently, reducing overall complexity while maintaining precision capabilities.
Solution Approach 2:
Instead of moving the tool along multiple linear axes relative to a fixed workpiece, the invention inverts the approach by keeping the tool-spindle fixed on the articulated structure and moving the workpiece support module along a single linear axis. This inversion simplifies the kinematic chain while achieving the same machining objectives.
2Speed
If multiple linear axes are implemented for high-speed machining, then machining speed and precision improve, but the budget and investment requirements increase
Solution Approach 1:
The invention introduces dynamic capabilities through the articulated structure with two pivoting arms that can rotate about vertical axes. This dynamic configuration allows the machine to adapt its tool path and positioning without requiring additional linear axes, maintaining high machining speed while reducing structural complexity.
Solution Approach 2:
The articulated structure serves multiple functions: it provides tool positioning in the horizontal plane, enables various machining orientations, and allows flexibility in workpiece arrangement. This multi-functionality replaces what would traditionally require separate linear axes, reducing overall device complexity.
3Measurement precision
If traditional linear axis structures are used, then positioning precision can be maintained, but flexibility and accessibility for maintenance are reduced
Solution Approach 1:
The invention transitions from a traditional three-linear-axis system to a hybrid system combining one linear axis with two rotational axes in the articulated structure. This dimensional change allows the machine to achieve the same positioning capabilities while improving accessibility and flexibility for maintenance operations.
Solution Approach 2:
The articulated structure acts as an intermediary between the fixed tool-spindle and the movable workpiece support module. It provides precise positioning through its rotational joints while maintaining flexibility and ease of maintenance, bridging the gap between precision requirements and operational accessibility.
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 articulated structure reduces costs, enhances precision and flexibility, allows for machining beyond the traditional machining zone, and simplifies tool changing and maintenance, while maintaining the precision and rigidity comparable to linear axis machines, with improved accessibility and compactness.
Implementation Method 1
a first means of driving in rotation comprising a rotating shaft motor ensuring the movement about this axis
Implementation Method 2
equipped with encoders and cycloidal reducers for precision and rigidity
Implementation Method 3
equipped with encoders and cycloidal reducers for precision and rigidity
Data Source
AI summary
The invention relates to a machine tool (M) comprising a kinematic structure (100) that moves an electric spindle (300) in a plane perpendicular to the axis of the electric spindle (300), notable in that said kinematic structure (100) is an articulated structure comprising two articulated arms (110, 120) articulated about axes of rotation parallel to the axis of the electric spindle (300), the second end (122) of the second arm (120) accepting the electric spindle (300), the translational movement of the workpiece (P) with respect to the tool (O) of the electric spindle (300) in a linear movement parallel to the axis of the electric spindle (300) being brought about by a workpiece (P) support module (200) or by a plate support module (130).