SU893572A1 - Power press power member - Google Patents

Description

(54) POWER MECHANICAL PRESS

I

The invention relates to mechanical engineering, in particular to the structures of mechanical press assemblies.

A mechanical press power body is known that contains a crank shaft with an integral connecting rod mounted on it and connected to a slide, consisting of upper and lower parts telescopically interconnected and locking its link in the form of a bolt driven by a pneumatic cylinder, as well as balancer 1 .

In the known device, the seat member is turned on and off by a bolt interconnecting the upper and lower parts of the connecting rod.

A disadvantage of the known device is low reliability and safety, since when the pneumatic network is broken, the shutter does not turn off.

The purpose of the invention is to increase reliability and safety.

This goal is achieved by the fact that the power body of a mechanical press contains a crank shaft with an integral connecting rod mounted on it and connected with a slider consisting of upper and lower parts telescopically connected to each other and a locking element in the form of valves driven by pneumatic cylinders, also counterbalancer, provided with a retainer, made in the form of a double-arm lever arm, a spring-loaded rod, as well as an emphasis and an additional pneumatic cylinder with a piston and a pusher in contact with it .

Q, while the spring-loaded rod is pivotally connected at one end through the link with the double-arm lever and placed in the lower part of the composite shatun with the possibility of interaction with its upper part, the said double-arm lever is hinged on the slide, the additional pneumatic cylinder is fixed on the lower part of the connecting rod, and the support is mounted on the frame with the ability to interact with the slide and the other end of the two shoulders.

20

Claims (1)

FIG. I shows the general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 - the cyclogram of operation of the elements of the mechanism depending on the angle of rotation of the crank shaft The power unit comprises a crank shaft 1, on which the upper part of the composite rod is mounted, including the head 2, the rod 3 with the thickened lower part 4 and the pusher 5 in the lower part of which a bevel is made. The upper part of the connecting rod is telescopically connected to its lower part, which includes the body 6 and the head 7, interconnected by bolts 8. The head 7 is connected to the slider 10 by a spherical surface 9. The angle of inclination of which corresponds to the angle of the bevel of the pusher 5. The piston 12 is held in its initial position by the spring 13. On the lower part of the connecting rod, pneumatic cylinders 14 are fixed, the pistons 15 of which are connected to the valves 16 placed in the transverse groove of the head 7. The springs 17 keep the pistons 15 in the initial position i.e. in the position when the valves 16 are open and do not overlap the opening in the head 7. In the head 7 there is a retainer, made in the form of a rod 18 with a spring 19, connected through a link 20 with a double-arm lever 21 mounted on a bracket 22, rigidly mounted on the slider 10. The spring 23 presses the lever 21 to the stop 24 mounted on the slider 10. On the base 25 there is a stop 26 and a balancer 27 connected to the slider 10. A longitudinal groove 28 is made in the link. . When the press drive is turned on, the crank shaft 1, through the head 2, reciprocates the rod 3 and the pusher 5, while the slider 10 under the action of the balancer 27 is in the B position corresponding to the upper point, and is pressed by the bracket 22 to the pL. 26. The double-arm 21 is also pressed limiter 26 and through the earring 20 holds the rod 18 in a position in which the Central hole of the head 7 is open. When the reciprocating movement of the rod 3, the head 7 together with the body 6 performs an oscillatory motion relative to the vertical axis of the press. When the head 7 is turned to the left, the rod 18, compressing the spring 19, is held by the link 20, and when the head 7 is turned to the right, the rod 18 remains in contact with the thickened part 4 of the rod 3, and turning, pushes the link 20, moving it along the groove 28. For switching The press supplies compressed air to the piston cavities of cylinders 11 and 14 when the crank shaft 1 is not enough to reach the top dead one. At that, the point gates 16, in contact with the thickened part 4, shaft 3, remain in the initial position, and compression 12, compressing the spring 13, closes pusher 5 on coal about (., corresponding When the upper dead point passes, the pusher 5 passes the piston 12 and informs the casing 6, the head 7, and together with them the slider 10 a downward movement, while the scraper 3 releases the transverse groove of the head 7 and the shutter 16 are closed at the angle and further perceive the technological force of the shtampovka.The slider 10, moving down, moves away from the stop 26, while the spring 23 pressing the double-arm lever 21 turns it up to the stop 24, and the rod 18 under the action of the spring 19 enters under the butt end thickened part 4 of the stem 3. When pr When Krivoshchep 1 point B is located, which corresponds to the bottom dead center, the compressed air is supplied to the rods of the pneumatic cylinder 11 and 14, the piston 12 and the bolts 16 move to their original position, and the upper and lower parts of the connecting rod through the clamp 18 remain in a closed state and under the action of balance bob 27, the brush 3 with its thickened part 4 through the housing 6, the head 7 lifts the slider 10 until it stops 26. At the same time, the lever 21 rotates, squeezing the spring 23, and through the shackle 20, leads the rod 18 from under the end of the thickened part 4 of the rod 3. Springs 13 and 17 serve t -shtoka for turning off the piston 12 and the gate 16 in the absence of air in a press system, providing safe operation. With this design of the proposed power unit, as compared with the known, the economic effect is provided by eliminating the random movement of the slide under the action of the balance lever and ensuring that the press is turned on while increasing the speed of the crank shaft, operating the press in single stroke mode when the crank shaft rotates, and chains. The invention of the power body of a mechanical press, containing a crank shaft mounted on it, associated with a composite connecting rod, consisting of telescopically connected between the upper and lower parts and the locking element in the form of valves driven by pneumatic cylinders, as well as a balancer, characterized by that, in order to increase reliability and safety, it is equipped with a retainer made in the form of an earring, double-arm and spring-loaded rod, as well as an emphasis and an additional pneumatic cylinder With a piston and a pusher in contact with it, the spring-loaded rod is hinged at one end through the link with the double-arm and is located in the lower part of the composite shatun with the ability to interact with its upper part, the two-shouldered lever is pivotally mounted on a slider, an additional pneumatic the cylinder is mounted on the lower part of the composite connecting rod, and the stop is mounted on the frame with the ability to interact with the crawler and the other end of the two shoulders. Sources of information taken into account during the examination 1 USSR Author's Certificate No. 650834, cl. B 30 B 1/26, 27.06,77 (prototype).