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September 2021

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Exact Metrology Provides Scanning and Training to Customers

Strohwig building

Large machining parts inside Strohwig

Leica Absolute Tracker

Leica Absolute Scanner

Strohwig Industries is a large, family-owned tool and die, injection mold and custom machining shop that helps turn the ideas of engineers into reality. The company was founded in 1978 by Wolfgang Strohwig and his brother-in-law Larry Glass in Polk, WI. The initial location had only 600 sq. ft. of space and a single Lucas Boring Bar. Located today in Richfield, WI, Strohwig Industries has 180 employees with a 225,000 sq. ft. facility. With 56 horizontal and vertical CNC machines and the ability to handle over 100 tons, Strohwig is well equipped to handle large machining.

Brad Bucholtz, Quality Technician, explained Strohwig's mission as, "The design, manufacture and repair of medium to large forging dies, plastic injection molds and metal die casts, as well as the manufacture of custom contract parts and/or components." They machine a variety of steel (H-13, stainless steel, castings, forgings) and aluminum components. The company serves various markets including aerospace, automotive, mining, defense, building assembly, oil and gas, energy, marine, etc. This is why they decided to use Exact Metrology equipment for their inspection needs.

Bucholtz said they have worked with Exact Metrology for over 10 years. Initially, the company provided metrology services. He added that before 2010, there was no need for metrology because company employees manually inspected jobs that needed it. Working with Exact Metrology, Strohwig bought a Hexagon Romer Arm in 2016 and Leica Tracker in 2019. When the Romer RS6 scanner was released Exact Metrology offered a trade in on the older Romer arm. The productivity increase was so great it was easy to justify the investment of the new arm/scanner. This equipment came in handy when Strohwig received a request from a major Midwestern forge that has a long-standing relationship with them.

This metal forging company in Illinois has a 126-year history and specializes in open die forging and rolled ring forging. The company was using coordinate measuring machines (CMMs) but needed to upgrade their equipment. A new job required precise measurability of a large forged part with complex geometry. Dean Solberg, Exact Metrology Co-President, suggested that they invest in scanning technology. Thus, the company purchased a Leica tracker, as well as PolyWorks software.

Leica Absolute Tracker AT960 features an all-in-one integrated design, single-box probing system and smart connectivity. Additional features include continuous measurement, entry-level probing with T-probe and two handheld laser scanners. One is an 8" line scan and another is a 24" line scan to capture large amounts of data quickly. The System is IP54 Certified for protection against dust and other contaminants. PolyWorks|Inspector was used to verify the quality of the part through the use of high-density point clouds and contact probe datasets. The scan was performed in a working environment, not a traditional lab, which meant that personnel were doing this while forging occurred. In the past, Strohwig machined various parts for them. Now, this forge had Strohwig test for compliance vs. non-compliance in one of their forged parts.

To do this, Strohwig used the Hexagon Romer Arm and the Leica Absolute Tracker. The portable measuring arms allowed company personnel the flexibility to measure on the machine shop or the floor. It featured no honing procedures, simplicity of operation and reliable 3D measurements. The Absolute Arm 7-axis delivers tactile probing and laser scanning in an ergonomic package. Once this was completed, they used PolyWorks|Inspector to verify the quality of the part by using a color map. In the future, the company is looking to purchase additional Exact Metrology products.

Strohwig was able to coordinate with the company as they use common platforms to communicate and shared daily emails and PowerPoint presentations with their results. Bucholtz used data mergers to combine the Romer and Leica data sets into one report.

Since using Exact Metrology, Bucholtz said, "We are able to provide detailed reports to our customers. Also, we are able to perform in-process inspections to validate specific processes." He further commented that Exact Metrology allowed them to supply a superior product and their deliverable to the customer has greatly improved.

When referring to the benefits of working with Exact Metrology, Bucholtz noted, "Training only goes so far. After initial training, there are many stumbles, and Exact is always there to make sure we get the knowledge we need. Onsite or offsite, they go above and beyond the call to make sure we can provide our customers with the data they need."

For more information contact:

Strohwig Industries

3285 Industrial Rd.

Richfield, WI 53076


Dean Solberg

Exact Metrology, Inc.

20515 Industry Avenue

Brookfield, WI 53045


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