David Archer

Archetype Joint LLC, Orion, MI

Archetype joint specializes in joint design, testing and validation.


Fastening Do’s and Don’ts

After writing this column for six years, I understand the need for brevity. With that in mind, I thought it would be useful to summarize some of the key points that I’ve raised in the past.

I have included the issue in which each column appeared so you can delve into the topic in more detail if desired. As always, please feel free to contact me with your questions, comments or observations.

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The Effect of Sample Size on Test Results

One of the more interesting aspects of conducting joint tests for manufacturers is the question of sample size.

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Fastening Threads: Problems Solved

Bolted joints are the vast majority of our consulting business. Our work is divided evenly between validating joints under development and troubleshooting problems with existing joints.

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Fastening Threads: Getting with the Program

Programmable torque tools have become popular in recent years, due to quality initiatives.

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Fastening Threads: All Screw Head-Drive Features Are Not the Same

Impact head and drive style selection can have a profound effect on assembly productivity. To examine this, we recently conducted a study focusing on machine screws.
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Fastening Threads: Every Picture Tells a Story

Most bolted joints enter production with installation torque based on textbook estimates.
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Fastening Threads: Even If It Ain't Broke, Make It Cheaper

Reducing cost requires action with potential risk, whose objective is often viewed as compromise. However, the need for constantly improving product value is not going to go away. Here are three ways to address cost reduction.

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Fastening Threads: Losing Weight Is Always a Challenge

The growing desire to reduce fuel consumption has caused manufacturers of all modes of transportation to be more willing to implement the use of light-weight materials, even where there is a cost penalty. However, use of new materials in a given application always carries some risk that must be mitigated through analysis and testing.

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Fastening Threads: More Data, Less Knowledge?

Just as both the quality of the joint and the quality of the joint designer’s knowledge base will be limited by reliance on numerical analysis, the same limitations occur when experience and applied experimentation is all one has to draw from.
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Fastening Threads: Torque Control vs. Angle Control

Angle control is a more fundamentally sound method of measuring the tension applied to a bolted joint.
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Behind the Scenes at Ford's Michigan Assembly Plant

People are the heart and soul of the 2012 Assembly Plant of the Year. This slideshow shows some of the men and women who build three different types of electrified vehicles alongside traditional gas-powered cars on the auto industry’s most flexible assembly line—Ford’s Michigan Assembly Plant in Wayne, MI. Photos courtesy Ford Motor Co.


 Live from The ASSEMBLY Show, Bob Wood, president of ECI Spinnomatic, talks about his company’s newest product: a fully automated riveting cell equipped with a rotary indexing table, a six-axis robot, an orbital forming unit, and laser sensors. 

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Welding: Principles & Practices

This text introduces students to a solid background in the basic principles and practices of welding.

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