Machine Tool Workpiece Exchange Synchronization
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Solution Overview
Problem
Existing machine tools face inefficiencies in workpiece machining due to interruptions caused by the exchange of workpieces during the machining process, which can disrupt the continuous operation and precision required in machining processes.
Innovation Solution
A machine tool with a loading and unloading device, such as a working robot, that synchronizes its movements with the work holding device to exchange workpieces during machining, allowing for simultaneous machining and exchange without interrupting the process, using a common or separate control unit for coordinated control and positioning, and featuring spindle assemblies on independent guides for collision-free movement and efficient tool changing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If workpiece exchange is performed during machining process, then productivity is improved, but positioning precision deteriorates due to movement of work holding device
Solution Approach 1:
The work holding device is made movable on a guide arrangement, allowing it to dynamically adjust its position. The device can move between a first position for workpiece exchange and a second position for machining, enabling continuous operation without compromising positioning precision during critical operations.
Solution Approach 2:
The machining process is segmented into distinct phases: workpiece exchange phase and machining phase. The work holding device moves to different positions for each phase, allowing independent optimization of each operation - fast exchange when not machining, precise positioning when machining.
2Manufacturing precision
If workpiece exchange interrupts machining process, then positioning precision is maintained, but productivity deteriorates due to downtime
Solution Approach 1:
The machining process continues uninterrupted while workpiece exchange occurs. The work holding device moves to a first position allowing robot access for workpiece exchange, then returns to the second machining position, ensuring continuous productive action without idle time.
Solution Approach 2:
The work holding device is positioned in advance at the first position for workpiece exchange before machining begins. This preliminary positioning allows the robot to exchange workpieces while the device is stationary, and the device can then move to the machining position ready to operate immediately.
3Ease of operation
If loading and unloading device follows positioning movement of work holder, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The control system receives position signals from the work holding device and uses this feedback to adjust the loading and unloading device's position accordingly. This feedback mechanism enables automatic coordination without complex manual control, simplifying operation while managing system complexity through intelligent control.
Data Source
AI summary
A machine tool for machining workpieces, wherein the machine tool has at least one first spindle assembly with at least one working spindle on which a machining tool for workpiece machining is arrangeable, wherein the machine tool has a workpiece holding device for holding workpieces for the purpose of workpiece machining by way of the machining tool, wherein the machine tool has a guide arrangement for the relative positioning of the workpiece holding device holding the workpieces and the first spindle assembly for workpiece machining, wherein the guide arrangement comprises a workpiece-holder guide for guiding the workpiece holding device so as to position a workpiece holder holding the workpieces relative to the first spindle assembly.