Rotary Table Dual-Spindle Drilling for Irregular Hole Layouts
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Solution Overview
Problem
Conventional machining centers and multi-axis drilling machines process holes one at a time, even when they are not regularly arranged, leading to inefficiencies in machining time.
Innovation Solution
A drilling method and machine that utilize two spindles and a rotating machining table to align and simultaneously machine two holes, with a control device creating a machining order and program to optimize the positioning and movement of the spindles for efficient hole creation, employing a genetic algorithm to determine the optimal machining sequence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional machining centers or multi-axis drilling machines are used to drill holes, then the machine structure is relatively simple and easy to operate, but the machining time is long because holes are processed one by one
Solution Approach 1:
The machining system is segmented into multiple independent spindles (first spindle, second spindle, etc.) that can operate simultaneously on different holes. Each spindle functions as an independent machining unit, allowing parallel processing of multiple holes rather than sequential processing by a single spindle.
Solution Approach 2:
Multiple spindles are merged into a single machining system that shares common support structures, control systems, and workspace. The spindles are positioned along the X-axis and can be coordinated through a unified control device to machine multiple holes simultaneously, combining the capabilities of multiple machines into one integrated system.
2Productivity
If holes not arranged at the same pitch are processed one by one, then the machine structure remains simple, but the machining time increases and efficiency decreases
Solution Approach 1:
The machining system dynamically adjusts the positioning and movement of multiple spindles based on the specific arrangement of target holes. The spindles can be independently positioned along the X-axis and moved to appropriate locations to machine holes at different pitches simultaneously, rather than following a fixed sequential pattern.
Solution Approach 2:
The system changes the operational parameters of multiple spindles (positioning coordinates, movement speeds, rotation speeds) according to the specific pitch requirements of different hole arrangements. This allows the machine to adapt to various hole patterns while maintaining simultaneous machining capability.
3Loss of time
If multiple spindles are used to machine holes simultaneously, then machining time is reduced, but the positioning and coordination of spindles becomes more complex
Solution Approach 1:
The control device receives feedback information about the positions and states of multiple spindles and the machining table, and continuously adjusts their movements and operations. This closed-loop control ensures precise positioning and coordination of spindles while maintaining efficient simultaneous machining operations.
Solution Approach 2:
A central control device acts as an intermediary between the multiple spindles and the machining table, coordinating their movements and operations. The control device manages the complex interactions between spindles and the rotating table, simplifying the overall control architecture while enabling sophisticated simultaneous machining.
4Productivity
If the machining table is rotated to align holes with spindles, then simultaneous machining of multiple holes is enabled, but the positioning precision requirements increase
Solution Approach 1:
The machining table is designed to rotate dynamically to different angles to align various hole patterns with the spindles. The table rotation mechanism provides precise angular positioning while maintaining the rigidity and stability needed for accurate hole machining, adapting to different workpiece configurations.
Solution Approach 2:
The system replaces complex mechanical repositioning of spindles with rotational movement of the machining table. This substitution simplifies the positioning mechanism while achieving the same effect of aligning holes with spindles, reducing mechanical complexity while maintaining positioning precision.
Data Source
AI summary
A drilling method of machining holes that are not regularly arranged in one direction in a short machining time is provided.A drilling method, includes: creating a machining order of machining a first hole to be machined with a first spindle and a second hole to be machined with a second spindle for a workpiece having a plurality of target holes on a machining table, the first spindle and the second spindle arranged in X direction; rotating the machining table relative to the first spindle and the second spindle so that the first hole and the second hole are arranged in X direction with the first hole located nearer to the first spindle; moving the first spindle and the second spindle relative to the machining table so that the first hole and a center of the first spindle are aligned and the second hole and a center of the second spindle are aligned; and machining the first hole with the first spindle and the second hole with the second spindle.