Multi-Table Machining Center Layout for Continuous Loading Cycles
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Solution Overview
Problem
Conventional numerically controlled machining centers for wooden workpieces face inefficiencies in production time and production capacity due to downtime during loading/unloading operations and weight balancing issues, especially with multiple tool changes.
Innovation Solution
A machining center design with multiple workpiece tables and machining groups, where each machining group operates on multiple tables simultaneously, allowing for coordinated movement and programming to perform machining operations while one table is being unloaded or loaded, thereby optimizing production time and increasing production capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional machining centers use two tables and two heads operating sequentially, then the structure is simple and easy to operate, but production time increases due to downtime during loading/unloading operations
Solution Approach 1:
The machining center is segmented into multiple independent working stations (tables and heads), allowing parallel operations. With N tables and N-1 machining groups, the system divides work into simultaneous independent tasks, enabling continuous production while one table undergoes loading/unloading operations.
Solution Approach 2:
The system maintains continuous useful action by ensuring that while one table is being loaded or unloaded, other tables continue machining operations. The coordinated movement and programming allow machining operations to proceed without interruption on active tables, eliminating idle time and maximizing productivity.
2Productivity
If the number of tables and heads is increased to improve production capacity, then productivity increases, but weight balancing issues arise especially with multiple tool changes
Solution Approach 1:
Instead of one large complex system with N tables and N heads, the invention segments into N tables with only N-1 machining groups. This reduction in the number of moving components simplifies weight balancing while maintaining high productivity through parallel operations on multiple tables.
Solution Approach 2:
Each machining group is designed to operate on multiple tables, providing multi-functionality. This universality allows N-1 machining groups to service N tables, reducing the total number of machining heads required and thereby simplifying weight balancing while maintaining production capacity.
3Productivity
If N tables and N-1 machining groups operate in parallel, then productivity increases by eliminating downtime, but coordination and control complexity increases
Solution Approach 1:
The system employs coordinated movement and programming with feedback mechanisms to manage the parallel operations of N tables and N-1 machining groups. The control system monitors table positions, machining status, and tool changes, automatically coordinating movements and operations to maintain optimal productivity while managing complexity through intelligent control.
Data Source
AI summary
A machining center, comprising:a number N of workpiece tables equal to or greater than three,a number N of first guides, which extend parallel to a first direction; along said first guides being movable respective to workpiece tables, one for each first guide,a number N−1 of second guides, which extend parallel to a second direction transverse to said first direction,a number N−1 of machining groups each comprising at least one machining head; each machining group being movable parallel to said second direction along a respective second guide;a number N×(N−1) of machining areas wherein the machining groups can operate on workpieces present on said tables; along each first guide, or for a respective table, there being present N−1 machining areas, one for each machining group, so that each machining group can operate, according to a programmed work cycle, on all said N workpiece tables,a number N of workpiece loading/unloading areas, one for each workpiece table.