SU664843A1 - Toggle mechanism of press pulling-out ram drive - Google Patents

Description

one

The invention relates to mechanical engineering, namely, to forging equipment.

A crank-lever actuator for driving a press slider is known, which contains an eccentric pivotally connected to a rocker, one arm of which is pivotally connected through a connecting rod with a slider mounted in the direction of the bed frame, and the other pivotally with link 1.

A disadvantage of the known construction is the presence of eccentrics located on different axes, a gear train between them, which increases the dimensions of the press and reduces its manufacturability. The aim of the invention is to reduce the dimensions, improve the technological design of the press and stabilize the speed of the slide during stretching.

The goal is achieved by the fact that it is equipped with an additional slider, an eccentric and a connecting rod, in the frame are made for an additional slider, hingedly connected to the earring, and with the additional connecting rod - with an additional eccentric.

FIG. 1 is a kinematic diagram of a slider actuator actuator; in fig. 2 - mixing and speed graphs

main slider depending on the angle of rotation of the crank; in fig. 3 — graphs of torque at the crank, at the stretch site, depending on the stroke of the main slider; in fig. 4 shows an embodiment of the mechanism; in fig. 5 is a section A-A of FIG. four; in fig. 6 is a section BB of FIG. four.

The crank-lever actuator consists of an eccentric 1, covered by the hinge 2 by the rocker arm 3 and mounted on an unconnected shaft 4. One end of the rocker arm 3 in the hinge 5 is connected by a connecting rod 6, which is connected with a hinge 7 to the slider 8 fixed in 9. The other end of the yoke 3 through the hinge 10 is connected with an earring 11, which in the hinge 12 is connected with an additional slider 13 fixed in the fixed guides 14. In

the same hinge 12 is connected to the additional slider 13 by one end of the additional connecting rod 15, the other end of which in the hinge 16 is connected to the additional eccentric 17 rigidly connected to the main eccentric 1.

The actuator operates as follows.

When the eccentrics of the main 1 and additional 17 rotate around the axis 4, the movement of one arm of the rocker arm 3 is transmitted

through the connecting rod 6 to the slider 8, moving in the guides 9. At the same time, the other end of the rocker arm 3 receives movement from the additional rammer 13 through the shackle I. The latter is reciprocated by an additional rod 15 driven by an additional eccentric 17.

Thus, the main slider 8, receiving movement from the two eccentrics 1 and 17, obtains the resultant movement, which is most beneficial for stretching, especially deep products. The main slide 8 performs an accelerated downward movement, then a reduction in speed occurs at the moment of contact with the workpiece and during the drawing process it stabilizes and, finally, accelerated upward movement.

Such a law of motion of the slider allows one to significantly reduce the dynamic loadings that occur at the moment of contact of the tool with the workpiece, and the noise caused by the impact.

Technical and economic efficiency from the use of this design of the actuator is the ability to extract from the best

Slider speed

IG

FULL DLY of this tkopbefbid DeforMyrovayni, with the lowest energy costs and with high performance.

 the invention

KrivoShpno-lever actuator actuator exhaust press slide containing an eccentric, connected

with a rocker arm, one shoulder of which is pivotally connected through the rod with a slider installed in the guide frame, and the other arm hinged with the earring, characterized in that, in order to reduce the size, increase the design technological effectiveness and stabilize the speed of the slide during exhaust, it equipped with an additional slider, eccentric and a rod, guides are made in the frame

for an additional slider, knitted with an earring, and with the help of an additional shatuna — with an additional eccentric.

Information sources,

taken into account in the examination

1. Japan Patent No. 46-24672, ser. IV, cl. 73B27, 1971.

14

Sh

. T

l pi / rriflmuu moment oa / ty koliboipts

Angle nuSopama KpuBoujijfia

Y / y 5

.g 4

/ /

U

 S

5., And ns

/ t-A

4/5

17

 7 /;

2.J IS

7 2