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If of round cross section the bar will typically be end-forged to create a head, which is then flatted by additional forging. The head may then be machined to a precise thickness and flatness. An alternative method for using round bar is to form a loop and to forge-weld (hammer weld) or electrically weld the free end to the main bar. [2]
These are commonly available in steel and aluminum; the names "angle iron" and "channel iron" are still commonly used (informally) even though their literal namesake, wrought iron, has been replaced by steel and aluminum for most uses. In a machine shop, bar stock and plate are often called billet, although in a rolling mill, that word refers ...
The resultant forging is subsequently machined (lathe-turned and milled) into the final shape of a wheel by removing excess metal from the forged blank. A forged magnesium wheel is 25 percent lighter than cast wheel. The main disadvantage of forged wheels is the high manufacturing cost.
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ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes; ASTM B308/308M: Standard Specification for Aluminum-Alloy 6061-T6 Standard Structural Profiles; ASTM B483: Standard Specification for Aluminum and Aluminum-Alloy Drawn Tube and Pipe for General Purpose Applications
The automatic hot forging process involves feeding mill-length steel bars (typically 7 m or 23 ft long) into one end of the machine at room temperature and hot forged products emerge from the other end. This all occurs very quickly; small parts can be made at a rate of 180 parts per minute (ppm) and larger can be made at a rate of 90 ppm.
BBS continues to produce one-, two-, and three-piece forged wheels out of aluminum and magnesium alloys, as well as high performance flow-formed wheels and low-pressure cast wheels. [20] BBS also actively uses specialized quality and weight optimization methods, such as CNC back-milled spokes , x-ray inspection , FEM analysis, flow-forming ...
The drawbar requires a trailer which either loads the drawbar lightly (for example a small boat trailer, or caravan, or the load is the weight of the coupling components only (larger trailers, usually but not always with a steerable hauled axle, front or rear). By contrast, the fifth wheel is designed to transmit a proportion of the load's ...
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