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 ?
Although bulldozers and loaders are excellent dedicated earth-moving equipment, a tractor with matched implements can provide the rural landowner a good solution for material moving.
Killed on March 16, 2003, while trying to block an Israeli armored bulldozer from demolishing Palestinian homes in Rafah, Gaza.
To predict C[O.sub.2] emissions from bulldozer's activity, the total diesel fuel consumption (gal) was multiplied by 10.15 kg/gal and converted to pounds (lbs) based on 454 grams per pound.
Some of the benefits that are expected to accrue as a result of this measure are provision of a level playing field to all the suppliers of bulldozers in Pakistan.
It happened at around 7pm on Tuesday, November 6, when the Caterpillar bulldozer was parked in a field near to the old airport museum in Old Washington Road, in Usworth, in Washington.
Rachel Corrie, 23 ans, a ete ecrasee le 16 mars 2003 sous les chenilles d'un bulldozer de l'armee alors qu'elle s'opposait avec d'autres membres du Mouvement international de solidarite (ISM) et des Palestiniens a la destruction d'une maison palestinienne a Rafah (sud de la bande de Gaza).
Bulldozer XL5000 original released in early 2010 was the company's biggest hit, appealing to consumers who are seeking a healthier, cleaner and more effective alternative to what is available in the market.
AMD processor roundup: new Phenom II X4 and X6 flagships; Fusion & Bulldozer details
Two Chinese bulldozer drivers have combined their passion for rock-and-roll music with heavy duty vehicles to put on an unusual street performance in China's Changchun city.
The driver of the bulldozer that crushed Rachel Corrie to death will testify in court on Thursday, while the military commander in charge of the unit on the day will give evidence at a future date.
Summary: UMM AL QUWAIN u Five Bangladeshi workers were killed on the spot, and two others were seriously injured, when the car they were travelling in rammed into a bulldozer at a junction in Umm Al Quwain, on Wednesday.
Summary: Israeli police said they shot dead a Palestinian who attacked them during the demolition on Tuesday of part of the Arab East Jerusalem home of a Palestinian who killed three Israelis in a bulldozer rampage in July 2008