Estimating is more than Setup and Run Time Part 2

In the not to distant past many manufacturing processes were very labor intensive.  In countries such as China and India there is still a great deal of manual labor intensive manufacturing.  I remember as a child I worked in my Father’s sheet metal shop and the machine of choice was a Strippit 30/30.  I have seen many of these machines and they are still in use today and very reliable.  One day the company purchased a Diacro VT-19 and it was a dream.  This machine was able to be loaded with multiple tools unlike the 30/30 where it was a one tool machine.   The Diacro VT-19 was still a manual process machine but the great thing about the machine you can create the entire part without removing the material.  The 30/30 was setup to punch 1 or more holes only if they were lined up and used the same tooling.   Todays NC machines hold vastly more tools and also are automated where there is no manual intervention during the run cycle.

Why should I mention this?

Estimating has changed and each of the three machines which make the ”same” part have different setup times.  Needless to say you should use the best machine for the job.

Strippit 30/30

The Strippit 30/30 was setup by putting in a single punch, setting the x and y stops.   For each hole different hole these three steps had to take place.   The formula to estimate the setup time would be

(Number Of Tool Changes)*(Time Per Tool Change) + (Number Of  X Stop Changes) * (Time Per X Stop Change) + (Number of Y Stop Changes)*(Time Per Y Stop Change)

This is a lot of effort and can be improved by automating the machine but these machines are still in use.  The above formula work and give you a reasonable accurate estimate.  I’m currently ignoring the other factors like gathering the tools, etc.

Diacro VT-19

The Diacro VT-19 was setup by placing all the tools in the Turret.    The last part of the setup would be to put in the template which would be used to guide the material to the correct location so the punch could put the whole in the correct spot.  The formula to estimate the setup time would be

(Number Of Tools)*(Time Per Tool)+(Time To Setup Template)

This is a lot of effort and can be improved by automating the machine to eliminate setting up the template.

I’ll Continue next time on the Automated CNC Machine and Laser, Waterjet or Plasma machines

MIE QuoteIt from MIE Solutions offers free quoting software for step by step quoting.  The quoting software is very user friendly and offers customization of operations, materials, formulas and even table lookups.   Please visit our website and take a tour of the free quoting software instead of the old method of quoting in excel.

Author: MIE Solutions

David Ferguson has over 20 years of experience in the manufacturing and fabrication industry. David Ferguson has been to over 100 manufacturing companies helping and guiding them to be more efficient and cost effective. As a child in Junior High School David Ferguson found a passion for the early computer systems, which would drive much of his future work. David Ferguson created and sold his first computer program, Arrow Data Systems, which was an early CAD/CAM system for the Apple 2e Computer. In the late 1980's after seeing his father (a sheet metal manufacturer) come home many nights estimating, David Ferguson saw an opportunity to optimize his effort through computer technology. Shortly thereafter the FabriTRAK Production Control package was developed. The Quote It! estimating package was developed out of the FabriTRAK system to become one of the leading sheet metal estimating packages in the world. David Ferguson has always had a passion for developing software to make the manufacturing process simpler, faster and more efficient. Prior to founding MIE Solutions David Ferguson worked with his father at Alco Sheet Metal, METALSOFT Inc. and was a consultant at Toyota Motors Sales. David Ferguson has his Masters in Computer Science and Mathematics from California State University, Long Beach.

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