bulldozer


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bulldozer

a powerful tractor fitted with caterpillar tracks and a blade at the front, used for moving earth, rocks, etc.

Bulldozer

 

A self-propelled earth-moving machine consisting of a caterpillar or wheeled tractor or similar machine with an attached operating member—a curved blade (plate) located outside the base of the machine’s undercarriage. It is utilized for layered digging, leveling, and shifting (for distances of 60-150 m) of earth, minerals, road-construction materials, and other materials for building and repairing roads, canals, and hydraulic-engineering and similar works.

There are several types of bulldozers: those with a fixed blade mounted perpendicular to the longitudinal axis of the basic machine; those with a swiveling blade that can be set at an angle in the horizontal plane on either side of the machine’s longitudinal axis or at right angles to it; and those of the universal type, with a blade having two hinged, articulated halves that can be set in the horizontal plane at various angles to the machine’s longitudinal axis or perpendicular to it (track-layer). The blades of all types are equipped with mechanisms with hydraulic, cable, or electromechanical drives for raising and lowering, swiveling in a plane, tilting in a transverse plane, and inclining forward or backward in the direction of the vehicle’s motion. Bulldozers are supplied with interchangeable equipment (scarifier tines, graders, spreaders, stub-wings, and so on) that broaden their usefulness and increase their efficiency for specific jobs.

(2) A bending press for hot or cold machine bending in dies of parts (such as clamps, brackets, and angles) from blanks having various cross sections. The presses are two basic types: crank-operated and hydraulically operated. The bull-dozers most commonly used in forging and stamping production are of the level crank-operated type, with a force of 0.2-5 meganewtons (MN; 20-500 ton-forces) and a rate of 6-20 strokes per minute. High-speed bulldozers with a force of 0.2 MN (20 ton-forces) and a rate of 45-60 strokes per minute are used for the hot bending of blanks with small cross sections.

bulldozer

[′bu̇l‚dōz·ər]
(mechanical engineering)
A wheeled or crawler tractor equipped with a reinforced, curved steel plate mounted in front, perpendicular to the ground, for pushing excavated materials.
(metallurgy)
A machine for bending, forging, and punching narrow plates and bars, in which a ram is pushed along a horizontal path by a pair of cranks that are linked to two bullwheels with eccentric pins.

bulldozer

bulldozer
A tractor or other prime mover equipped with a blade attached by arms or brackets to its front end; used in pushing or piling earth or rock.
References in periodicals archive ?
This is evidenced by the treatment of the body of 22-year-old Ghassan Abu Teir, the driver of the bulldozer in the 22 July attack.
He said he reached Rachel's body less than one minute after the incident and it was immediately clear by marks in the ground that Rachel had been hit by the bulldozer.
County crews used bulldozers, above, to rescue residents from the flooded Polynesian Mobile Home Park.
By his own admission, Morgan drank around eight pints of lager on a night out with friends before getting behind the wheel of the bulldozer and driving towards the protest site.
As Morgan began to drive down a hill the bulldozer hit a police transit van and started to push it down a road.
According to Dan Sholly, Yellowstone's Chief Ranger, bulldozers were authorized for the first time on July 29, to protect Grant Village from the Shoshone fire.
After the Israeli commander and the driver became aware of contradictions in their comments, they became so confused that the bulldozer commander said, "He said what he saw and I said what I saw.
The report includes the present scenario and the growth prospects of the global bulldozer tractor market for the period 2015-2019.
Coordinator of the committee against the Apartheid Wall, Ahmad Salah, said in a statement that a number of Israeli soldiers, accompanied by personnel from the Israeli civil administration and a bulldozer, raided and razed some 3 dunums of Palestinian land, located between al-Khader town and Housan village.
Bulldozer Group, the company behind brands such as Toko, Movida, VIP Room and Sass Cafe, took home the award for 'Best Hospitality Group' at the 11th Arabian Business Awards 2014.
A student died and two others were injured on Tuesday morning when their car collided with a bulldozer on the Hail University campus.
NNA - An Israeli bulldozer backed by a "Merkava" tank crossed Wednesday the technical fence in the Valley of Qatmoun facing the border town of Rmeish, without trespassing beyond the "Blue Line," NNA correspondent in Tyre reported.