Smed Herramienta De Mejora Continua
Páginas: 3 (735 palabras)
Publicado: 29 de septiembre de 2012
Quick Changeover Single Minute Exchange of Dies
1
Outline
Changeover and Changeover Time Traditional Setup SMED SMED Process Steps Ideas for Improvement
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Changeover DefinedChangeover is the total process of converting a machine or line from running one product to another
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Changeover Time Defined
• Changeover time is the total elapsed time between the last unit ofgood production of the previous run, at normal line efficiency, to the first unit of good production of the succeeding run, at full line efficiency.
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Traditional approach
Setup is given andfixed Therefore, Use highly skilled setup personnel Minimize product variety Combine lots Make large batches
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Another way
Setups CAN be improved! Small lot production REQUIRES short setups Setuptime reduction of 90% and more is common
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Benefits of setup reduction
Better quality Lower cost Less inventory Better flexibility Better worker utilization Shorter lead time and morecapacity Less process variability
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Classification of setup activities
Type 1 Gathering, preparing, and returning tools, fixtures, etc. Type 2 Removing previous setup, mounting next setup on machineType 3 Measuring, calibrating, adjusting Type 4 Producing test pieces, further adjustment until parts are good
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What is SMED?
Single Minute Exchange of Dies is changing process tooling in 9minutes or less. The process was developed by Shigeo Shingo at Mazda, Mitsubishi and Toyota in the 1950’s and 1960’s. Separate internal and external activities. Convert internal activities to externalactivities. Streamline all activities.
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Single Minute Exchange of Dies
Internal set-up activities. Elements in the changeover which can only be done when the machine is stopped. Externalset-up activities. Elements that can be performed when the machine is running.
10
Why SMED?
Reduced inventories. Improved productivity. Higher quality levels. Increased safety. Improved...
1
Outline
Changeover and Changeover Time Traditional Setup SMED SMED Process Steps Ideas for Improvement
2
Changeover DefinedChangeover is the total process of converting a machine or line from running one product to another
3
Changeover Time Defined
• Changeover time is the total elapsed time between the last unit ofgood production of the previous run, at normal line efficiency, to the first unit of good production of the succeeding run, at full line efficiency.
4
Traditional approach
Setup is given andfixed Therefore, Use highly skilled setup personnel Minimize product variety Combine lots Make large batches
5
Another way
Setups CAN be improved! Small lot production REQUIRES short setups Setuptime reduction of 90% and more is common
6
Benefits of setup reduction
Better quality Lower cost Less inventory Better flexibility Better worker utilization Shorter lead time and morecapacity Less process variability
7
Classification of setup activities
Type 1 Gathering, preparing, and returning tools, fixtures, etc. Type 2 Removing previous setup, mounting next setup on machineType 3 Measuring, calibrating, adjusting Type 4 Producing test pieces, further adjustment until parts are good
8
What is SMED?
Single Minute Exchange of Dies is changing process tooling in 9minutes or less. The process was developed by Shigeo Shingo at Mazda, Mitsubishi and Toyota in the 1950’s and 1960’s. Separate internal and external activities. Convert internal activities to externalactivities. Streamline all activities.
9
Single Minute Exchange of Dies
Internal set-up activities. Elements in the changeover which can only be done when the machine is stopped. Externalset-up activities. Elements that can be performed when the machine is running.
10
Why SMED?
Reduced inventories. Improved productivity. Higher quality levels. Increased safety. Improved...
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