Estimating Shearing (Sheet Metal Cutting)

The basic definition of shearing is cutting metal into smaller pieces.  If we define shearing as cutting material then not only a shear can do this process but metal scissors, lasers, punch presses, etc can also do the same function.  The shearing that is discussed hear is a machine which cuts metal with a blade.  Below is an example of an Amada shear.

Shear

Shears come in different tonnages and tolerance capabilities.  The more tonnage on a shear the thicker the material can be sheared.    A shear has both a front and back gauge which lets you measure the length of your cut from either of the two sides of the shear.

Some options when estimating shear time includes setup.  Setup is the time it takes set the front or back gauge to the proper measurement and verifying it is good.  In order to get the most consistent estimates questions below should be answered during the setup

How Many Back Gauge Setups

How Many Front Gauge Setups

By answering the above questions a formula can be derived to give you a setup time that is answered simply versus having the information in an estimators head.  A time of 5 minutes per back gauge setup and 3 minutes per front gauge setup.  The estimator would just have to enter the quantity of cuts and how the cuts will be made to arrive at consistent setup times.

There are other setup factors to be aware of which is handling time including getting the material, stacking the material, etc.

Next post will go into more of these areas in some more depth.

Please visit MIE Solutions at mie-solutions.com for more information.

 

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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