压力机简介外文文献翻译中英文翻译.doc
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1、 外文资料 Introduction to press Press is a compact structure versatility press. With a versatile, high production efficiency, the press can be widely used in cutting, punching, blanking, bending, riveting and forming and other processes. By applying strong pressure on the metal blank metal to plastic de
2、formation and fracture processed into parts. Large pulley driven by a motor (usually doubles as a flywheel) by mechanical presses work triangle belt driven through a clutch gear pair and slider-crank mechanism, the slider and punch straight down. 1 Basic Introduction. 1.1 Screw PressScrew press with
3、 a screw and nut as a transmission mechanism, and by the flywheel screw drive forward and reverse rotary motion into reciprocating slide down forging machinery. When working, the electric motor to rotate the flywheel to accelerate energy savings, through the screw, nut push the slider downward movem
4、ent. When the slider contacts the workpiece, is forced to decelerate to a complete stop of the flywheel, into rotational kinetic energy of the impact energy stored by the slider against the workpiece to deform. After the fight, the flywheel motor reversing, driving the slider to rise back to its ori
5、ginal position. Screw press with a nominal specification work force to represent. 1.2 crank pressCrank press is one of the most common cold stamping equipment, used for cold stamping die working platform. Its structure is simple, easy to use. By the bed in the form of the body structure is different
6、 crank press can be divided into open or closed crank press Crank presses; driven by the number of links can be divided into single-point or multi-point press press; press slide number is one or two can be divided into single-action or double-action press press. 1.3 Friction PressFriction press mac
7、hine is a strong universal pressure processing machine is widely used, can be used in a variety of pressure processing industries. In the machinery manufacturing industry, friction press applications more widely available to complete forging, upsetting, bending, correction, coining work, and some ha
8、ve no flash forging presses to accomplish this. Because of the press in the use of a larger universal, and there structure, installation, handling and auxiliary equipment is simple and low-cost advantages, so in machinery manufacturing, automobile, tractor and aviation industries in the press shop,
9、forge shop and forging workshops are widely used, but also for blanking and refractory suppression work.Over 1.4 pressesMulti-station press is an advanced press equipment, is an integrated multi-press, usually by head unit, feed mechanism, consisting of the press and the tail section. Fastest beat u
10、p to 40 beats / min or more, to meet the high-speed automated production. Unstacking head unit can be divided into units, magnetic belts and cleaning, oiling equipment; feed mechanism feeding arms generally composed; presses are generally divided into more than one slider and slider, choose accordin
11、g to the different needs,Tail section is generally constituted by a conveyor belt. 2 mechanical structurePress consists of four parts: a four-column hydraulic press machine; combined control cabinet; electric heating systems and insulation devices; mold conveyor gantry. The above composition with in
12、tegrated design, make nice shape, appearance, compact structure is simple, reliable, easy to maintain. 2.1 on a four-column hydraulic press machinePress should have a reliable structural rigidity resistance to deformation, hydraulic station location, press row set mold hoisting connected devices, hy
13、draulic station and press row has a removable dust cover. Can the direction of the workpiece length (3000) direction. Technical parameters are as follows: Nominal 190T; effective table size 3000 750 mm2; pressure exhaust velocity of 75 100 mm / s; maximum open distance of 550 mm (excluding heating p
14、late); dwell time 8h (workpiece 130 ) ; press the base height of 0.5 0.55m; press row and base flatness of 0.2 mm; press row lamination base average gap 0.25 mm (not less than 10 measuring points). 2.2 Heating SystemHeating the heating system is made of steel plate, heating, insulation layer. Two up
15、per and lower heating plates are connected with the press and the press row fixed base and easy removal, heating plate made of high quality 45 # steel tune tribute treatment. Electric heating plate placed in the heating tube and a thermocouple. Thermocouple placement fastening reliable, easy to disa
16、ssemble. Heating plate Technical parameters: the plane size 3050 650 mm2; flatness of 0.2 mm; measuring point arrangement: on board 3:00; under the board 6:00. Heating pipes made of stainless steel outer casing, operating voltage 220V. Unilateral qualify, the number is a multiple of 3. Electric heat
17、ing pipe replacement convenient and reliable. Wiring of the protective devices. Insulation layer is disposed between the heating plate and the base (or press row), the heating plate is surrounded by the insulation plate provided good insulation performance should be selected materials, the heating p
18、late is quite planar dimensions, the thickness of not less than 20 mm.2.3 Control CabinetRack presses the action and temperature cabinet. Instrument panel and switch on the cabinet; power switch, indicator, voltmeter, ammeter; press the action button and indicator light; pressure indicating instrume
19、nt; heating switch and indicator light; digital temperature regulator (accuracy 1 ); insulation timing control, over-temperature alarm; maximum temperature 180 ; heating rate of 1.7 2.5 / min; temperature inhomogeneities 3 , the heating power of each phase power balance; temperature regulator temper
20、ature region corresponding real-time control, When all reaches the set value 3 , timer expires after a set time, the temperature control system can automatically process heat or power by the setting. 2.4 Mold transport aircraftA carriage with an upper input roller structure presses one end connected
21、 to the base (removable), one end placed on the ground (height-adjustable). Carrying capacity 3T; lose height on the surface of the roll heating plate flush; plane size (2800 2900) 750mm2 (available part); compartment temperature pressure plate on press row and around the base to reduce mold heating
22、 process The heat loss with aluminum (or stainless steel) and the insulation material. To facilitate the placement may be divided into several pieces. 3 mechanical principlesPresses are usually driven by a motor through the friction disc flywheel rim leaving the flywheel rotates, so this press known
23、 as friction press, Chinas largest cattle friction press is 25 megabytes. Larger size presses with hydraulic system drives the flywheel, called hydraulic screw press, the maximum size of 125 megabytes cattle. Later appeared with an electric motor directly drives the flywheel presses, Its compact, le
24、ss transmission links, due to the frequent change of control of the higher electrical requirements, and requires special motors.Rotary presses no fixed lower dead point of the larger die forgings, can repeatedly blow molding can be singles, and even play jog. Strike force and deformation of the work
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