Feeder Replacement Management for SMT Mounting Cycle Balance
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Solution Overview
Problem
In mounting systems, when a production schedule involves multiple types of boards, feeder replacement during setup changes can disrupt cycle time balance due to a lack of vacant attachment portions, leading to inefficiencies in the mounting process, especially when component shortages occur without pre-prepared spare feeders.
Innovation Solution
A management device and method that utilize a mobile work device to pre-replace feeders by detaching a pre-served feeder from a mounting attachment portion and attaching a replacement feeder predicted to have a component shortage, ensuring continuous operation even when component shortages occur, by executing a spare component pickup process from a replacement feeder attached to an alternate position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a replacement feeder is attached to a vacant mounting attachment portion in advance, then the spare component pickup process can be executed when component shortage occurs, but there is no vacant attachment portion available when the mounting attachment portion is in a predetermined serving state
Solution Approach 1:
The mounting attachment portions are divided into functional groups: active mounting portions (for current production), pre-served portions (for next production), and replacement portions (for spare components). This segmentation allows the system to maintain multiple feeder states simultaneously, enabling both continuous operation and feeder replacement capability without conflict.
Solution Approach 2:
The system adds a temporal dimension to feeder management by implementing pre-served feeders that are prepared in advance for future production runs. This creates a multi-layered feeder architecture where feeders at different stages (active, pre-served, replacement) coexist, allowing the system to handle both immediate mounting needs and future setup changes simultaneously.
2Productivity
If a pre-served feeder is attached to a mounting attachment portion for next production, then setup change process is supported, but the mounting attachment portion has no vacancy for replacement feeder when component shortage occurs
Solution Approach 1:
Different mounting attachment portions are assigned different functional qualities: some portions are designated for active mounting, others for pre-served feeders, and others for replacement feeders. This local differentiation allows each portion to serve its specific purpose optimally, with replacement portions specifically reserved for handling component shortages without interfering with pre-served feeder operations.
Solution Approach 2:
The mounting attachment portions are designed with universal compatibility to accommodate different feeder types (active, pre-served, and replacement feeders) while maintaining standardized interfaces. This multi-functionality allows the same physical structure to support diverse feeder roles, enabling the system to switch between different operational modes seamlessly.
3Reliability
If feeder replacement is performed during mounting process, then component shortage can be addressed, but cycle time balance is lost when there is no vacant attachment portion
Solution Approach 1:
Replacement feeders are attached to designated mounting attachment portions in advance, before component shortages occur. This preliminary action ensures that when a component shortage is detected, the replacement feeder is already in position and can be activated immediately without disrupting the mounting cycle time balance.
Solution Approach 2:
The system maintains continuous mounting operation by having replacement feeders pre-positioned and ready to activate. When component shortage occurs, the transition to the replacement feeder is seamless and occurs within the existing cycle time, preventing any interruption or loss of productive action in the mounting process.
Data Source
AI summary
A management device causes a mobile work device to execute a pre-replacement process of detaching a pre-served feeder from a mounting attachment portion before a component shortage of a feeder and attaching a replacement feeder corresponding to a feeder predicted to be subjected to the component shortage to the mounting attachment portion from which the pre-served feeder is detached when the feeder attached to the mounting attachment portion is predicted to be subjected to the component shortage and the mounting attachment portion is in a predetermined serving state such that there is no vacancy in the mounting attachment portion and the pre-served feeder to be used in the next and subsequent productions is attached to a part of the mounting attachment portion.