Measurement
Surface Texture From Ra to Rz
The irregularity of a machined surface is the result of the machining process, including the choice of tool; feed and speed of the tool; machine geometry; and environmental conditions. This irregularity consists of high and low spots machined into a surface by the tool bit or a grinding wheel.
Read MoreDFGT - Double Flank Gear Testing
Functional gear testing, also known as total radial composite deviation, is a method of looking at the total effect of gear errors. This test method simulates the conditions under which a set of gears is likely to operate as a result of the gears meshing together.
Read MoreThe Three Ds Of Straightness Plugs
We have touched on different applications of air gaging: size, match gaging and form applications such as taper. In this column, we'll discuss air straightness plugs.
Read MoreStacking Up For Big IDs
For those medium and large parts with inside diameters greater than 4 inches, an inside micrometer is often used as the inspection tool of choice. This is especially true if the volume of parts is low and there is a large range of diameters to account for.
Read MoreMaking Gage Management Software Work For You
Influenced by quality standards such as ISO 9000, industrial facilities recognize the need to implement increasingly better control of inspection, measuring and test equipment.
Read MoreCAD-Based Measuring Software Handles Large Complex Parts
Many CMMs today are outdated with respect to the needs of today's quality standards and production requirements. In most cases, the original CMM machine hardware has the built-in precision to accurately provide the ongoing sophisticated measuring demands. The problem is that the software and even most of the upgrades provided with the original machines may not be adequate.
Read MoreThe Dial Tells It All
Dial indicators—you've seen one, you've seen them all. They are all over the shop, and as you walk around, they all look the same to you.
Read MoreSay Hello to Mr. Abbé, Mr. Hooke And Mr. Hertz
Whenever you use a handtool or precision gage, you should be aware of typical pitfalls that prevent good gage performance. These include measurement errors resulting from environmental conditions (dirt and temperature), loose and/or worn gage parts, and operator misuse.
Read MoreFeels Like A Go To Me
Once a QC manager came to me, confused and dissatisfied. He was spending money to buy quality masters, but his inspection process was not improving.
Read MoreGood Parts, Good Measurements
A machine tool must be capable of generating both, says a software company with a new vision for the role of metrology data in the emerging era of globally integrated manufacturing enterprises.
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