Rivet
A rivet is a short rod with a head formed on one end. A rivet is inserted through aligned holes in two or more parts to be joined; then by pressing the protruding end, a second head is formed to hold the parts together permanently. The first head is called the manufactured head and the second the point. In forming the point, a hold-on or dolly bar is used to back up the manufactured head and the rivet is driven, preferably by a machine riveter. For high-grade work such as boiler-joint riveting, the rivet holes are drilled and reamed to size, and the rivet is driven to fill the hole completely. Structural riveting uses punched holes.
Small rivets (11 mm and under) are for general-purpose work with head forms as follows: flat, countersunk, button, pan, and truss (Figure R.1). These rivets are commonly made of rivet steel, although aluminum and copper are used for some applications. The fillet under the head may be up to 0.8 mm in radius.
Large rivets (13 mm and over) are used for structural work and in boiler and ship construction with heads as follows: roundtop countersunk, button (most common), high button or acorn, pan, cone (truncated), and flattop countersunk.
Boiler rivets have heads similar to large rivets with steeple (conical) added but have different proportions from large rivet heads in some cases.
FIGURE R.1 Standard rivet heads.
FIGURE R.2 Two types of blind rivet.
Special-purpose rivets are tinners’ rivets, which have flat heads for use in sheet-metal work; cooper’s rivets, which are used for riveting hoops for barrels, casks, and kegs; and belt rivets, used for joining belt ends.
Blind rivets are special rivets that can be set without access to the point. They are available in many designs but are of three general types: screw, mandrel, and explosive (Figure R.2). In the mandrel type the rivet is set as the mandrel is pulled through. In the explosive type an explosive charge in the point is set off by a special hot iron; the explosion expands the point and sets the rivet.
Tinners Rivet Sets - Bookshelf
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This book provides an account of those parts of contemporary set theory that are relevant to other areas of pure mathematics.Elements of mathematics, theory of sets
This is a softcover reprint of the English translation of 1968 of N. Bourbaki's, Théorie des Ensembles (1970).Sets
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