CN203221662U - Ten-thousand ton press machine with double oil cylinders being enlarged by double hinge rods - Google Patents

Abstract

The invention provides a ten-thousand ton press machine with double oil cylinders being amplified by double hinge rods. Two oil cylinders having a diameter of 600 are vertically and fixedly disposed right over a top beam. A piston rod is guided through a guiding sleeve disposed in the middle of the top beam and is connected to a shift fork. Double hinge rod force amplifiers, which are symmetrically disposed in a left-to-right manner, are disposed between the top beam and a slide block. Double bearers at the upper end are fixed to the top beam, and double bearers at the lower end are fixed to the slide block. The force output by the double oil cylinders is amplified by the double hinge rods and then drives the slide block to work.

Description

A kind of pair of ten thousand tons of forcing presses that oil cylinder is amplified by two toggles

Technical field

The utility model relates to ten thousand tons of forcing presses that a kind of pair of oil cylinder amplified by two toggles.

Background technology

Forcing press is a kind of widely used press at present.The main dependence on import of forcing press more than ten thousand tons, price is high.Conventional hydraulic machine, cylinder diameter are generally all controlled below 600, and excessive oil cylinder is difficult to make.And under the certain situation of cylinder diameter sectional area, wanting to improve the power output of forcing press, most of producers can solve by the method that improves system pressure.Can need bigger high-pressure pump but the pressure of pump is too greatly limited, too high system pressure, valve and potted component cost also sharply raises simultaneously, the structure relative complex, under the situation of super-pressure, there is certain dangerous and high fault rate in hydraulic system, and environment is also polluted easily.Mechanical type or crank-type forcing press are typically equipped with flywheel, and volume is big, and vibration is big, and running noises is big, and complex structure is influenced by easily at the dead point, and has vexed car phenomenon, can produce the overload accident under the serious situation.

Summary of the invention

The utility model forcing press is: a kind of pair of ten thousand tons of forcing presses that oil cylinder is amplified by two toggles, driving two diameters with the 31.5MPa hydraulic system is 600 oil cylinder, use two groups of toggle force-increasing mechanisms again, make the oil cylinder output pressure amplify 8 times again, thereby reach a kind of ten thousand tons of forcing presses.

The technical scheme of the utility model forcing press is: as shown in Figure 1: base, back timber are supported on the base by left and right pillar, and slide block 7 is fixed on guide rail guiding on the column by the left and right sides, two oil cylinders 8 that front and back are arranged be fixed on back timber directly over.Between back timber and slide block 7, be provided with shift fork 1, upper bracket 2, small rod 3, triangular coupling rod 4, big connecting rod 5, undersetting 6 from top to bottom.Small rod 3 upper ends and shift fork 1 are hingedly fixed in piston-rod lower end, and lower end and triangular coupling rod 4 apertures are hinged; The last hole of triangular coupling rod 4, middle part and upper bracket 2 are hinged and be fixed on the back timber, and following hole and big connecting rod 5 upper end holes are hinged; 5 times stomidiums of big connecting rod and undersetting 6 are hingedly fixed on the slide block 7, and described three connecting rods are composed in series two toggle force-increasing mechanisms with upper bracket 2 undersettings 6.

Above-mentioned it is characterized in that: two oil cylinders 8 vertically are fixed on directly over the back timber, piston rod is by being installed in the middle fairlead guiding of back timber and being connected with shift fork 1, between back timber and slide block, be provided with the two toggle force-increasing mechanisms that are symmetrically arranged, the upper end is fixed on the back timber with upper bracket 2, and the lower end is fixed on the slide block 7 with undersetting 6; The power of two oil cylinder 8 outputs promotes slide block work after amplifying by two toggles together.

Beneficial effect: because two toggle force-increasing mechanism is an angular effect mechanism, the power that therefore two oil cylinders spread out of is after amplifying through secondary, to be exported by slide block at last.

Description of drawings

The two toggle structural representations of 1 pair of oil cylinder of accompanying drawing.

Accompanying drawing 2 toggle reinforcement schematic diagrames.

30,000 tons of forcing press overall structures of accompanying drawing figure.

The specific embodiment

Toggle structure in conjunction with shown in Figure 2 is described below: according to the deduction thought of tandem compound toggle force-increasing mechanism, set up Mathematical Modeling, can draw this bilateral device---the theoretical reinforcement coefficient of the unidirectional input mechanism of bilateral combination:

$\mathrm{It}=\frac{1}{2}(\frac{1}{\tan \mathrm{\α}*\tan \mathrm{\β}}+1)$

In the formula: It is not for considering the theoretical reinforcement coefficient of friction loss;

α, β---be the toggle angle; F ₁Be input power; F ₀Be power output; F ₀=F ₁* It; When the toggle force-increasing mechanism is in vertical position when being critical condition simultaneously, according to shown in Figure 1, the theoretical power output F of slide block ₀To reach infinitely great.Because the factor of component elasticities such as friction loss and toggle distortion exists, this theory state is non-existent but in practice.We suppose α value one regularly, and the β value is more little, and It can be more big, but symmetrical toggle span is also more big simultaneously, and the lathe bed span is widened relatively, and the lathe rigidity reduces;

And in β value one regularly, α value is more little, and It can be more big, and is locked because of toggle and the stressed excessive deformation of hinge pin when the α value is infinitely small, is difficult to backhaul, particularly just enters locked district during α＜6 ° easily; And when the α value was spent greater than 6, the It multiple can sharply reduce, and power output can not effectively be amplified.The above analysis, we are according to rigidity, the tonnage demand of forcing press, and by the accurate calculation of CAD and CAE, the best angle value that draws mechanism is: α=6 °; β=30 °.

See shown in Figure 1ly, we get α is 6 °, and β is 30 °, and operating pressure is transferred to 25MPa, and single oil cylinder power output is 700T, and then the twin-tub output pressure is F ₁=700T*2=1400T, calculating theoretical reinforcement coefficient It ≈ according to formula is 8.8 times; Bring formula into, F ₀=1400 * 8.8=12320T; We have designed and manufactured ten thousand tons of forcing presses thus, Figure 3 shows that ten thousand tons of forcing presses that we manufacture and design.

This result of calculation means, uses the hydraulic system of 31.5MPa equally, then needs the oil cylinder of two diameters about 1800 just can reach the power output of 12320T.

This shows the forcing press that utilizes the two toggle mechanisms of two oil cylinders, can remedy the deficiency of simple hydraulic pressure or Mechanical Driven forcing press to a certain extent, thereby realize having complementary advantages.This kind forcing press is good rigidly not only, and is simple in structure, and with low cost, is the novel pressure machinery of a kind of efficient, energy-conservation, safety, environmental protection.

Claims (1)

1. two oil cylinders are by ten thousand tons of forcing presses of two toggles amplifications, it is characterized in that: driving two diameters with the hydraulic system of 31.5MPa is 600 oil cylinder, use two groups of toggle force-increasing mechanisms again, make the oil cylinder output pressure amplify octuple, thereby reach a kind of ten thousand tons of forcing presses, technical scheme is: two oil cylinders vertically are fixed on directly over the back timber, piston rod is by being installed in the middle fairlead guiding of back timber and being connected with shift fork, between back timber and slide block, be provided with the two toggle force-increasing mechanisms that are symmetrically arranged, the upper end double support is fixed on the back timber, and the lower end double support is fixed on the slide block; The power of two oil cylinder outputs promotes slide block work after amplifying by two toggles together.

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