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 ?
The Israeli bulldozer destroyed the wall surrounding the land and erected its gate", the statement added.
Bulldozers on 3 December had demolished an old building and 10 Shops in Shu'fat Camp, Jerusalem .
The bulldozers leveled a large tract of agricultural land before leaving the area, witnesses added.
of the town, where the bulldozers demolished an 80-meter-square house belonging
The team, led by Rajeev Pillai, is expected to give some tough competition to the Bulldozers in the finals.
According to the accusation sheet, prosecutors said the trio and other suspects [who remain at large] forged official papers in which they alleged that the bulldozers were examined and searched by Dubai Customs inspectors.
In the early hours of Tuesday morning a large number of ISF units headed to Hermel, accompanied by the Central Office of Drug Control, and waited for the bulldozers to arrive so they could commence the operation.
He said that Israeli bulldozers prevented the owners of the house from removing their house contents before demolishing it without any prior notice, according to a report of Palestine News and Information Agency "WAFA".
Summary: Two Chinese bulldozer drivers have combined their passion for rock-and-roll music with heavy duty vehicles to do an unusual dance.
A civil lawsuit brought by the parents of a US peace activist who was crushed to death by an Israeli forces bulldozer in the Gaza Strip in March 2003 has begun being heard in the Israeli city of Haifa.
Harvey bulldozers were used to move trash around so the Fire Department could make sure the fire was completely out.