Dual-Spindle Machining Center for Large-Part Precision Without Repositioning
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Solution Overview
Problem
Current multi-axis machining centers are limited in machining large workpieces, such as vehicle chassis or bodies, due to reduced productivity and precision when repositioning is required across multiple machine tools, and existing multitasking machines are bulky and inefficient for large-scale production.
Innovation Solution
A multi-axis machining center with two independent carriages and spindles that can move along multiple axes, supported by a rotating tool magazine with horizontal axes, allowing simultaneous machining of large workpieces with enhanced productivity and precision by enabling tools to be picked up automatically and rotated for efficient access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple machine tools are used to machine large workpieces, then different machining processes can be performed, but productivity and machining precision are drastically reduced due to repeated repositioning
Solution Approach 1:
The patent combines multiple machine tools into a single integrated machining center with multiple spindles (first spindle and second spindle) mounted on the same machine bed. This allows large workpieces to undergo multiple machining processes (milling, boring, tapping, etc.) without being transferred between separate machines, thereby eliminating repositioning errors and maintaining high productivity while achieving versatile machining capabilities.
Solution Approach 2:
The machining center is designed with multi-functional spindles that can perform various machining operations. The first spindle can perform milling and boring operations, while the second spindle can perform tapping and drilling operations. Both spindles are equipped with tool magazines and can automatically select and change tools, providing universal machining capabilities within a single machine platform.
2Adaptability or versatility
If multiple machine tools are used to machine large workpieces, then different machining processes can be performed, but machining precision is reduced due to workpiece repositioning
Solution Approach 1:
The patent combines multiple machine tools into a single integrated machining center with multiple spindles (first spindle and second spindle) mounted on the same machine bed. This allows large workpieces to undergo multiple machining processes (milling, boring, tapping, etc.) without being transferred between separate machines, thereby eliminating repositioning errors and maintaining high productivity while achieving versatile machining capabilities.
3Adaptability or versatility
If a single spindle moves with respect to multiple axes to machine large workpieces, then large workpieces can be machined, but productivity is limited
Solution Approach 1:
The patent combines multiple machine tools into a single integrated machining center with multiple spindles (first spindle and second spindle) mounted on the same machine bed. This allows large workpieces to undergo multiple machining processes (milling, boring, tapping, etc.) without being transferred between separate machines, thereby eliminating repositioning errors and maintaining high productivity while achieving versatile machining capabilities.
Solution Approach 2:
The machining center enables continuous machining operations through multiple spindles working simultaneously or sequentially on the same workpiece. The first spindle and second spindle can perform different machining operations at the same time, eliminating idle time and maintaining continuous productive action throughout the machining process.
4Adaptability or versatility
If known multitasking machines use a single spindle to machine large workpieces, then large workpieces can be machined, but the machines are extremely bulky and difficult to place inside the production facility
Solution Approach 1:
The patent utilizes vertical space by mounting spindles at different heights and positions on the machine bed. The first spindle and second spindle are arranged in a three-dimensional configuration, allowing multiple machining operations to be performed from different spatial positions. This vertical dimensionality optimization reduces the machine's horizontal footprint while maintaining the capability to machine large workpieces.
Data Source
AI summary
A machining center includes two independent carriages supported so that they can slide along respective longitudinal translation axes by two parallel horizontal rails fixed in a raised position to a supporting structure. The carriages support respective machining heads which can move along two respective translation axes. The machining heads support respective tool holding spindles in a rotatable manner about a horizontal rotation axis (Yr′, Yr″) by virtue of rotary support means. A workpiece holding table is supported at the base of the supporting structure. Two mechanized tool magazines are supported at the opposite longitudinal ends of the supporting structure and are accessible by the spindles. The rotary support and/or the workpiece holding table can rotate about a respective vertical axis.