Machine Tool Coordinate Transformation for Interpolation Turning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing machine tool methods for interpolation turning require complex and effort-intensive processes to define tool paths, especially when cutting contours in a machining plane, making it difficult to simplify the generation of tool paths.
Innovation Solution
A method and numerical control device that define a machine coordinate system and a rotation coordinate system, allowing for the definition of tool paths in the rotation coordinate system, which simplifies the relative movement between the tool and workpiece by aligning the rotation coordinate system with the workpiece machining axis and using existing turning cycles for interpolation turning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If special cycles are used to define tool paths in interpolation turning, then the tool path definition becomes possible, but the process complexity and effort increase significantly
Solution Approach 1:
The patent introduces an intermediary coordinate transformation system that acts as a mediator between the simple contour definition and the complex tool path generation. By defining contours in a workpiece coordinate system and automatically transforming them to machine coordinate system tool paths, the system eliminates the need for special cycles while managing the complexity transformation automatically.
Solution Approach 2:
The patent replaces the mechanical approach of using special cycles with a computational coordinate transformation system. Instead of relying on complex programmed cycles to achieve interpolation turning, the system uses automatic coordinate system transformation and mathematical calculation to generate the necessary tool paths from simple contour definitions.
2Manufacturing precision
If complex special cycles are implemented for interpolation turning, then precise contour machining is achieved, but the programming effort and time increase
Solution Approach 1:
The patent applies preliminary action by pre-defining the workpiece coordinate system and the transformation relationships between coordinate systems before the actual machining operation. The contour is defined once in the simplified workpiece coordinate system, and the transformation to machine coordinate system tool paths is performed automatically, eliminating the need for time-consuming programming of complex special cycles.
3Adaptability or versatility
If a fixed machine coordinate system is used for all operations, then the coordinate system management is simple, but the adaptability to different workpiece orientations and machining operations is limited
Solution Approach 1:
The patent segments the coordinate system management into multiple independent coordinate systems (machine coordinate system and workpiece coordinate system) with clear transformation relationships. This segmentation allows each coordinate system to serve its specific purpose while the transformation mechanism handles the adaptation between them, providing versatility without overwhelming complexity.
Data Source
AI summary
Relative movement between a tool and a workpiece for machining the workpiece with a machine tool is controlled by defining a machine coordinate system (MKS) relative to a machine base of the machine tool and a rotation coordinate system (RKS) relative to the MKS by defining the origin of the RKS in the MKS, defining the orientation of a selected coordinate axis of the RKS in the MKS, defining an axis of rotation around which the RKS rotates in the MKS, defining an angular velocity with which the RKS rotates around the axis of rotation, defining a tool path in the RKS, and controlling the relative movement according to the defined tool path. With this procedure, complex movements of a machine tool, in particular in connection with so-called interpolation turning, can be described or programmed in a relatively simple manner.