Inspection of metals : understanding the basics by F. C. Campbell

By F. C. Campbell

This publication covers the expertise of inpsection of metals, the most emphasis on ultimate half inspection on the factory or on receipt on the user's facility. the original characteristic of this ebook is that it offers an intermediate point creation to the several tools used to examine metals and complete components and a extra special evaluation of the categorical inspection tools for very important steel product varieties. The booklet is split into elements: half I supplies the fundamentals of crucial equipment used for inspection and trying out, whereas half II covers the categories of equipment used to examine assorted periods of steel components. the benefits and boundaries of every technique are mentioned, together with whilst different equipment can be warranted. specifically, the chapters on particular product kinds (e.g., castings) evaluate the several inspection equipment and why they're used

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38 / Inspection of Metals—Understanding the Basics Fig. 13 Optical comparator. Source: Ref 1 measuring devices: (a) gap measuring gage, (b) radius Fig. 14 Miscellaneous  gage, (c) depth gage, (d) stethoscope, (e) inside and outside calipers, (f) center gage, (g) feeler gage, (h) inside micrometers, (i) thread profile gage, (j) dial indicator. Source: Ref 1 Chapter 2: Visual Inspection / 39 Miscellaneous Equipment There are many other tools of the trade for visual examination. There are several other notable items that are definitely classified as visual examination items.

View cameras are simply cameras with a larger format. Common sizes are 4 by 5 inches, 5 by 7 inches, and 8 by 10 inches. These cameras produce probably the best quality, most detailed photos. They are somewhat bulky and often require tripod support. Film is available in black and white and in color. Prints can be greatly enlarged with little loss of detail. Macro cameras. are another form of the view camera. They are particularly adapted to produce magnified photos. This is accomplished by use of special lenses in conjunction with focusing bellows.

Scales can be both English and metric on the same rule and may be subdivided to as small as 1⁄100-inch divisions. These devices are also available with an adjustable 90° squaring edge to check for straightness. There are many magnifying devices available with built-in reticles (Fig. 12). Reticles made to measure nearly anything imaginable are available. If the desired reticle is not available, it can be custom-made. Micrometers are extremely accurate mechanical devices. They are commonly used to measure to 1⁄1000 of an inch and can be used to 1⁄10,000 of an inch.

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