Multi-Spindle Milling Stagger Controller
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Solution Overview
Problem
Existing multiple-spindle milling systems are inefficient in cutting complex contours due to limited adjustability and alignment capabilities, leading to increased number of passes, guide wear, power consumption, and part run times.
Innovation Solution
The milling apparatus features spindle Z-axis actuators and a stagger controller that allow independent adjustment of spindle positions and alignment, enabling a desired stagger angle to optimize cut swath and reduce the number of passes required, with the ability to rotate the head and adjust spindle axes to achieve a desired cut path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple-spindle milling systems are used for cutting contours, then productivity increases by producing multiple parts in parallel, but the systems lack adjustability for complex contour machining requiring multiple passes
Solution Approach 1:
The patent implements dynamic adjustability by allowing independent movement of each spindle along its own axis and enabling the head to rotate about the workpiece. This dynamic configuration allows the same multi-spindle system to adapt to different contour complexities and machining requirements, resolving the contradiction between maintaining high productivity and achieving the flexibility needed for complex contours.
Solution Approach 2:
The system changes geometric parameters by allowing independent positioning of spindles at different locations and orientations, and by enabling head rotation to various angles. These parameter changes enable the system to machine both simple and complex contours efficiently, maintaining versatility while preserving the parallel machining capability that delivers high productivity.
2Manufacturing precision
If traditional multi-spindle systems machine complex contours, then the number of passes increases, but this leads to increased guide wear and power consumption
Solution Approach 1:
By enabling dynamic head rotation and independent spindle movement, the system can achieve complex contour machining in fewer passes. The spindles can be repositioned and reoriented between passes to optimize the cutting path, reducing the total number of passes required and thereby minimizing guide wear and power consumption while maintaining manufacturing precision.
Solution Approach 2:
The patent introduces an additional degree of freedom by allowing the head to rotate about the workpiece. This dimensional change enables the spindles to access complex contours from multiple angles, reducing the number of linear passes required and decreasing the cumulative wear on guides and consumption of power while achieving the desired contour precision.
3Ease of operation
If fixed spindle alignment is used in multi-spindle systems, then the system is simple to operate, but it cannot achieve desired stagger angles for optimizing cut swath
Solution Approach 1:
The system maintains ease of operation through automated control while providing dynamic spindle alignment adjustability. Each spindle can be independently positioned and the head can be rotated to achieve desired stagger angles for optimizing cut swath. The automated control system manages the complexity, keeping the interface simple for the operator while enabling versatile spindle configuration adjustments.
Data Source
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AI summary
Milling apparatus for cutting desired contours into a workpiece (16) comprises a head (14) that moves relative to a workpiece in a direction of cut (11). Spindles (18) are supported on the head (14) for rotation about parallel spaced-apart spindle z axes and comprise respective rotary cutters (20) adapted for use in machining operations. A rotary head positioner (22) is connected between the head (14) and a milling machine (12) and is operative to rotate the head (14) about a head axis (15). A stagger controller (24) is connected to the rotary head positioner (22) and is configured to provide a desired swath of a cut to be formed in the workpiece (16) by rotating the head (14) to set a corresponding spindle stagger angle (S) value.