bulldozer

(redirected from Bulldozers)
Also found in: Dictionary, Thesaurus.

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 ?
Finally, a bulldozer arrives to knock tops from piles, but leaves soil loosely compacted--providing a good foundation for needlings and a good environment for wildlife.
Sources said, bulldozers carried out operations on Palestinian lands.
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.
In northern Gaza, Israeli tanks and bulldozers raided Beit Hanoun and shot indiscriminately on Palestinian houses and bulldozers set mounds of earth in the area.
2 -- color) A bulldozer Tuesday moves trash out of a pit that had been filled six to eight feet deep.
SNP councillor Alistair Barr said: "People will be standing in front of the bulldozers if necessary to stop them.
3 - Delivery of spare parts for CAT bulldozer D6N the servant.
by two military bulldozers, stormed Jabal Abu Sud, an area located to the west
Palestinian security sources informed KUNA that five Merkava tanks accompanied by four bulldozers penetrated 200 meters into eastern territories of Al-Zaytoun neighborhood.
County firefighter gets help from a bulldozer in controlling flames Friday afternoon in Val Verde.
PNN/Bethlehem/ On Thursday morning Israeli bulldozers destroyed all pipelines supplying water to Bardala village in Jordan Valley, leaving approximately 3500 villagers without water.