This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874 Excerpt: ...downwards, where the bloom falls on a Jacob's ladder, and Fig. 35.--Horizontal Rotary Squeezer. Fig. 36.--Brown's Squeezer, For Squeezing Puddled Balls. is conveyed to the puddle rolls. The figure shows the machine with rollers, to give the ball three compressions, but by inserting other rolls the ball is made to ...
Read More
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1874 Excerpt: ...downwards, where the bloom falls on a Jacob's ladder, and Fig. 35.--Horizontal Rotary Squeezer. Fig. 36.--Brown's Squeezer, For Squeezing Puddled Balls. is conveyed to the puddle rolls. The figure shows the machine with rollers, to give the ball three compressions, but by inserting other rolls the ball is made to receive a greater or less number of compressions before reaching the bottom of the machine. 125. Rolling Mills.--The shingled bloom, if intended for the production of merchant iron or other bars, is passed while still at a high temperature to the puddle rolls, or, as it is called, the forge train or mill, where it is rolled into bars some 16 feet in length and 3 inches wide by f inch thick, called then puddled bars, or if intended for plates or sheets, tho bars are made from 6 to 15 inches in width. The forge train consists of two pairs of cast-iron rolls of from 15 to 18 inches in diameter, placed in one line. The left hand pair, called roughing rolls, have turned on their surfaces a number of angular or A form grooves, diminishing in depth from left to right, and in order to better seize hold of the bar or bloom on its entry between the rolls, the surface of the grooves is usually roughened. In the right hand pair or finishing rolls, the grooves, instead of being angular are flat, as shown in the following sketch; the grooves in the top and bottom rolls of each set coming together, and jointly producing the section of the finished bar. The two rolls of each pair revolve at the same speed, which in the roughing rolls is from 60 to 75 revolutions per minute, and in the finishing rolls, 80 to 100 revolutions per minute; the bottomrolHs connected directly to the steam-engine, while the top one is driven by a spur wheel gearing into a wheel of the sam...
Read Less
Add this copy of A Manual of Metallurgy: Fuel, Iron, Steel, Tin, to cart. $20.17, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2011 by Nabu Press.
