Machine Tool Chain Storage Device for Rapid Tool Exchange
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Solution Overview
Problem
Machine tools face challenges in achieving short chip-to-chip times due to inefficiencies in tool exchange processes, leading to prolonged downtimes during tool changes.
Innovation Solution
A chain storage device is integrated into the machine tool, allowing for simultaneous tool exchange between the storage device and the chain storage device during tool spindle changes, utilizing a lifting device to move tools parallel to the spindle axis, thereby optimizing tool change times and reducing downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a traditional tool magazine is used for tool storage and exchange, then tool storage capacity is sufficient, but tool change time is prolonged leading to increased chip-to-chip time
Solution Approach 1:
The tool storage system is segmented into two independent parts: a background magazine with multiple storage locations for tool reservoir, and a chain storage device with fewer storage locations for active tool exchange. This segmentation allows simultaneous operation - while the spindle exchanges tools with the chain storage device, the background magazine independently replenishes the chain storage device, thereby reducing chip-to-chip time and improving tool exchange efficiency
Solution Approach 2:
The background magazine pre-stores multiple tools in its storage locations. During spindle operation, the chain storage device can quickly exchange tools with the spindle, while the background magazine simultaneously prepares and transfers the next required tools to the chain storage device. This preliminary preparation eliminates waiting time for tool changes, directly reducing chip-to-chip time
2Quantity of substance
If a chain storage device with many storage locations is used, then tool storage capacity increases, but device space requirements and complexity increase
Solution Approach 1:
Instead of creating one large chain storage device with many storage locations, the system segments tool storage into a background magazine (handling bulk storage) and a compact chain storage device (handling active exchange). The chain storage device only needs enough locations for simultaneous spindle operations, dramatically reducing its size and complexity while the background magazine provides the bulk storage capacity
Solution Approach 2:
The chain storage device acts as an intermediary between the background magazine and the tool spindle. It buffers tools during exchange operations, requiring only minimal storage capacity (e.g., 2-5 locations) to facilitate simultaneous exchange. This intermediary role allows the system to achieve high tool storage capacity through the background magazine without increasing chain storage device complexity
Data Source
AI summary
A machine tool is disclosed that comprises a machine frame, at least one tool spindle arranged on the machine frame and movable in relation thereto, a workpiece holder, and a storage device for tools which is arranged on the machine frame. A chain bearing device communicates with the storage device and the at least one tool spindle.