Steel rod

“ When the rod is made in the form of a stamping between dies it is possible to turn out great quantities at very low cost and at a very rapid rate, whereas the round steel rods would require to be machined from the solid bar to compete in price with the others. When phosphor bronze is used it is only necessary to bore out carefully and face the bearings at the two ends for the gudgeon pin and crankpin; the bearing at the crankpin end is always formed with a removable cap to facilitate fitting it nicely to the crankpin, journal and also to allow for adjustment as the bearing wears. ”

“ The best material of which to make them is decarbonized steel, or what is known as “soft steel.” It comes in smooth round rods and is homogeneous and easy to work. Cold-rolled iron rod makes very good plugs. The diameter may be half-inch or nine-sixteenths, the latter size being most preferable. With a three-eighth size screw the half-inch rod gives a one-sixteenth shoulder, which must fit tight to the barrel. If not fitted tight, the gas from the powder when the gun is fired will soon cause a leak which is difficult to remedy. ”

“ The weight was carried by a steel nut screwed on the end of the rod and resting on the upper head of the spring to be tested. This nut carried above it a hardened stirrup, with a sharp inner edge, which intersected the axis of the rod, produced. A delicate steel lever was pivoted to turn about a point at one fifth of the distance from the axis of the rod to the farther side of the scale seat. The upper edge of this lever was a straight line intersecting the axis of its trunnions. ”

“ Octagon steel, a quarter-inch in diameter, may be used for smaller tools, or round steel rod of this size may be employed. For small drills and tools, taps, etc., it will be found very convenient. No turning is necessary to fit to the solid chuck.
The common cheap bit stock, made from round steel, may be selected, and the square hole filled with a piece of iron and then brazed to make it solid. A hole is then drilled to fit the seven-sixteenths shank. A solid chuck is to be made to fit this, and drilled with a quarter-inch hole to fit the smaller sized shanks. ”

“ The parts sometimes made of steel are those subject to great wear, and for which strength with a minimum of size is necessary, as piston springs, piston rods, connecting rods, cranks, crank pins, and valve rods.
The parts generally made of brass are those subject to abrasion or corrosion, as the connecting rod brasses, the bearings for the crank shaft, the pump plungers or pistons, and their rods, linings for the pump barrels or bores, the bores of the glands, the condenser tubes, and all cocks and valves. ”

“ After the finish heat treatment, these test lugs were nicked and broken and the fracture of the steel carefully examined. This precaution made it possible to eliminate burned forgings as the test lugs were placed on sections which would be most likely to become burned.
There is a great difference of opinion among engineers as to what physical properties an aviation engine connecting rod should have. Many of the most prominent engineers contend that a connecting rod should be as stiff as possible. ”

“ The Billet Traverses the Morgan Continuous Mill at High Speed Emerging from the Last Roll as Finished Rod
As was explained, no reduction in thickness is brought about by the sides of the grooves in the rolls. Therefore, a bar or rod must be turned after each pass unless Bedson’s alternating horizontal and vertical rolls are used. This turning Morgan did in spiral tubes inserted between the successive sets of rolls, all of which were horizontal. These tubes operate as does the “rifling” in a gun barrel, in turning the rod. ”

“ Hard steel preserves its structure, but its molecular rigidity is so great that we obtain but mere traces of any change of polarity by torsion. I have found, however, that fine cast drill steel, untempered, of the kind employed by watchmakers, is most suitable; these are generally sold in straight lengths of 30 centimeters. Wires 1 millimeter in diameter should be used, and when it is desired to increase the force, several of these wires, say, nine or ten, should be formed into a single rod or bunch.
The wire as sold is too rigid to give its maximum of molecular rotation effect. ”

“ The most familiar example of the use of a connecting rod is in the steam-engine, where it is used to connect the rotating crank with the reciprocating piston. The rod itself is made of wrought iron or steel, and is generally circular or rectangular in section. ”

“ In winding the upper end the steel strip is held away from the wood by its spring, or by a wooden wedge, and the wire must be held close to the wood by the hand or by a piece of wire formed as a sort of staple. To wind a very long spring, or a spring longer than the rod, a clamp may confine the wire to the rod, and when the spring has been wound to its length, remove the clamp, draw back the winding rod, fix the clamp close to the outer end and begin to wind again without cutting the coil, push it off the end of the rod as it is filled each time. ”

“ Material thicker than the above requires the addition of more metal of the same or different kind from the welding rod, this rod being held by the left hand. The proper size rod for cast iron is one having a diameter equal to the thickness of metal being welded up to a one-half inch rod, which is the largest used. For steel the rod should be one-half the thickness of the metal being joined up to one-fourth inch rod. ”

“ Through an opening in one of the buildings he noticed a red, weaving thread; he entered and found himself in the rod-mill. Here, instead of the ingots, billets of steel, a little larger than an ordinary brick, were rolled. A man took the white-hot billet out of the furnace in tongs hung by a chain, and pushed it, suspended in the air, to the first roller. He in turn received it in his tongs, thrust it through the rolls to his partner, who caught it and returned it ”

“ The connecting rod, eccentric rod, crank pin, and shaft, are of steel. The eccentric-strap and flywheel are cast iron, and the other portions of the engine are of brass. The screw threads are all chased, and the flange, a, and head of the piston, F, in addition to being screwed, are further secured by soft solder. ”

“ Angle coupling for shafts at any angle (shown at angle of 90°) consisting of four crank pins sliding and revolving in holes bored in the shaft ends.
Section 17.—CONNECTING RODS AND LINKS. (See also p. 42.)
1999. Spring connecting rod of steel or wood.
2000. Attachment for connecting rod to a pump ram, with provision for taking up the brasses by a long screw.
2001. Connecting rod end, the back brass being set up by a set screw with coned point, which displaces by penetration a number of steel balls or shot.
2002. Solid rod end, with wedge gib and nut adjustment for brasses ”

“ The tests should be applied in every doubtful instance. When working on cast steel, a student may think that he must have a cast-steel filler-rod, but this is an exception to the general rule and he can use the same style filler-rod as he would employ on ordinary steel work. It might be mentioned here that when working on alloyed and high-carbon steels, the filler-rod generally contains some of the alloy or carbon which will tend to replace that destroyed by the action of the flame in the original metal. ”

“ The Rolling of Steel Plates It is manifestly impossible in the space at disposal to give in much detail the rolling of many of the better known products. Fortunately it is not necessary, for after description of the making of plate, pipe and tube, and of rod and wire, the rolling of other forms such as rails, bars, and the structural shapes, I beams, channels, angles, Z bars, etc., can well be imagined. ”

“ This tube, broken into rods of convenient lengths, then passes into the hands of another set of workmen, living for the most part in Venice. The rods are now carefully sorted, as to size, by women—the cernatrici—and handed over to the cutter, who, seated at a bench, cuts off equal lengths by passing the rod between a blade or chisel held in the hand, and a similar tool fixed in the bench, the size of the fragments being regulated by means of the scontro, a semi-cylindrical block of steel. ”

“ The hole through the tool must be of the size the rod is to be made, and the cutting tool set so as to allow the work to pass through the hole easily. Only one size rod can be made with this tool, and different sizes must be made for different sized rods; except the cutter which must be of steel, it can be made of cast iron. ”

“ There are automatic lathes which seize a steel or brass rod pushed within their clutch and chop it up and make shoulders and grooves and screw-threads on its outside, and drill out the centre and put another and different sized and shaped set of carvings on the inside,113 throw out the finished part, pull in the metal rod, and commence work afresh on it. Some of these lathes have five or six tools running and each performing its part in turn on the fuse or shell part. In one small-arm factory there is a huge room full of these automatic lathes all whirring and grinding away at their hardest. ”

“ For long continued runs on rod of one size the Morgan mill can produce more cheaply, its product is more uniform in temper and the loss from scaling is less as little of the rod is exposed while in the mill. As the first pair of rolls in the Morgan mill is set close to the furnace, less than one-quarter of the billet is in the mill at any one time and the forward end of the billet is on the reel as finished rod before the last of the billet leaves the furnace. With any process something occasionally goes wrong so that the rod does not follow the path intended. ”

“ Where proper attention is paid to the clipping of the steel to pieces, corresponding with the stubs, and properly mixing the whole, welding and forging by the heavy hammer, reducing by a tilt and rolling down to the smallest description of rod, a most excellent, tenacious, and dense body of iron is thus obtained; while, by cutting into lengths of six inches, bundling a number together, and re-welding them into a bar, an increased density and tenacity is gained, by an increase in quantity, and an elongation of the fibrous system. ”

“ The selection of this filling rod, or wire, is all-important, for the skilful and successful iron worker uses a piece of metal that will fuse well with the parts to be repaired, at about the same temperature at which they themselves will fuse. Mild steel or Norway iron which is 90 per cent. pure is frequently used, but there are no hard and fast rules because every master mechanic has his own ideas about such 258 things, and would not take the word of any manufacturing company. ”

“ A further process is the manufacture of the metal thus treated into SHEAR STEEL, by exposing a fasciculus of the blistered steel rods, with sand scattered over them for the purposes of a flux, to the heat of a wind-furnace until the whole mass becomes of a welding heat, when it is taken from the fire and drawn out under a forge-hammer,—the process of welding being repeated, after which the steel is reduced to the required sizes. ”

“ Here is a huge planing machine travelling to and fro over a copper bar. A crank shaft has been cut out of solid steel by boring holes close together through a thick plate, and the two sides of the plate have been broken off, leaving the rough shaft with its edges composed of a considerable number of semicircles. The shaft is slowly rotated on a lathe, and tiny clouds of smoke arise as the tool nicks off pieces of metal to reduce the shaft to a circular shape. [138] Other machines, with high-speed tool steel, are finishing gear shafts. Fly-wheels are being turned and worm shafts cut. ”

“ A small hole is drilled through the tubing and blade, and a soft iron wire rivet is inserted. The blade is held over a gas flame while the joint between it and the tubing is filled with soft soldering compound and ribbon solder.
The heated head is plunged into water and later finished with file and emery cloth. The whole process of making a steel broad-head requires about twenty minutes. Every archer should manufacture his own. Then he will treat them with more respect. Very few artisans can make them, and if they can, their price is exorbitant. ”

“ Then the steam-hammer shed, in which nothing but forging is done, was a flourishing place. All the wheels for the engines and waggons, together with piston rods, driving gear, axles, and cranks, were made there. These are obtained elsewhere now, some in England and Scotland, and other parts from abroad. Steel has superseded iron in a great degree, too, being harder, tougher, stronger and cheaper. The combined skill of the chemist and scientist has simplified the manufacture of it, and it is to be obtained in large quantities. ”

“ Between these two rolls, at the end of a long straight bar, is a mandrel or projectile-shaped ball of high-speed steel over which the white-hot tube must be pushed.
The reheated, curved skelp is pulled from the furnace and the forward end forced into the rolls which shoot it through and over the mandrel at high speed, forcing together and welding under heavy pressure the overlapping edges of what was formerly the plate. Amid the noise and the shooting sparks an unsuspecting bystander is quite startled by the suddenness of it all. ”

“ Reduction in the weight of machinery per indicated horse-power developed is, in general terms, the common line in which engineering effort lies, and in which no little advance has lately been made. Every possible opportunity of using steel, where it can be introduced with safety and efficiency, has been taken advantage of. Hollow crank steel shafts and propeller shafting in place of solid shafting; propellers and pistons of cast steel in place of iron; and boilers of mild steel plates, are a few of the directions in which large weight-savings have been effected. ”