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 ?
Now, Liebherr's Litronic generation of crawler dozers is a step towards higher performance as well as better economy and more comfort, Liebherr reports.
We are developing our new range of crawler dozers in Poland which will be relevant to Africa and the Middle East, which are among the most important markets for Dressta globally.
The features of the GoPush app were designed with our 1050K customers in mind," said Mark Oliver, crawler dozers product marketing manager, John Deere Construction & Forestry.
Of the 10, 70 to 342 hp crawler dozer models offered by Deere, the 450J, 550J and 650J dozers are the most popular machines used by the fire industry.
Case Construction Equipment has added the 650L to its crawler dozer line.
Tenders are invited for provide a small to medium four-wheel drive rubber tire backhoe, medium size crawler dozer, excavator and operator on an on-call and emergency basis for the installation of irrigation pipeline, hire by the hour.
The PR764 Litronic crawler dozer delivers maximum pushing power and ripping force in all speed ranges regardless of the surface.
is known producing some of the largest mining and construction equipment in the industry, the focus of its new D475A-5 crawler dozer is less on size and ,none on noise--or more specifically, lack of noise.
The innovative rubber-tracked dozer combines the speed of a grader with the flotation of a crawler dozer.
Tenders are invited for Used 2005 or newer Crawler Dozer, 185 net horsepower, including backup rippers and winch, with full standard equipment and accessories,fully serviced and ready to operate for District.
division recently introduced three new J-Series wheel loaders ranging in power from 205 to 275 hp, a new 26 metric ton crawler dozer, a new 710G backhoe and enhanced C-Series II 655C and 755C crawler loaders.