SU1505796A1 - Device for controlling stroke length of crank press crosshead - Google Patents

Abstract

The invention relates to forging and pressing machinery, in particular, to the design of devices for adjusting the stroke of the slide of presses. The purpose of the invention is to increase reliability. If it is necessary to adjust the stroke of the slide, compressed air is supplied to the pneumatic cylinders 14. In this case, the movable elements 15 of the pneumatic cylinders 14 are pressed against the discs 13. As a result of the eccentrics of the eccentric unit 2, the stopper is relative to the bed 5. When the shaft 1 rotates in the direction opposite to its rotation during the working stroke of the slide, the eccentric sleeve 4 rotates total eccentricity, that is, the stroke of the slide. After that, the supply of energy to the pneumatic cylinders 14 is stopped. 5 Il.

Description

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zuna presses. The purpose of the invention is to increase reliability. If it is necessary to adjust the stroke of the slide, pneumatic cylinders 14 are supplied with compressed air. In this case, the movable elements 15 of the pneumatic cylinders 14 are pressed against the disks 13. As a result, the eccentrics of the eccentric block 2, the stopper TC relative to the frame 5. Yu

The invention relates to a machine-building, in particular to the design of forging equipment.

The purpose of the invention is to increase reliability.

FIG. 1 shows the device, 20 general view; in fig. 2 shows section A-A in FIG. 1 (at the moment corresponding to the working stroke of the slide); on fig.Z - the same, at the moment, corresponding to the regulation of the progress of the slide; 4 to 25 section B. -B in FIG. 1 (at the moment corresponding to the working stroke of the slide); in fig. 5 - the same, at the moment, corresponding to the regulation of the slide motion.

The device contains an eccentric block 2 mounted on shaft 1, placed in Schutau 3 with eccentric block 2 covered by eccentric bushing 4, and also an assembly of eccentric block 2 with shaft 1 35 and base 5 and eccentric bushing 4 with shaft 1 o Assembly The eccentric bushing 4 with the shaft 1 is made in the form of an axis 6 mounted in the eccentric bushing 4 with a socket 7 and a lever 40 fixed on the shaft 1 and installed with its shoulder in the 7th socket The eccentric bushing 4 is symmetrically complete with respect to its ends cavity 9 dp placement Levers 8. The eccentric unit 2 is made in the form of two eccentrics installed in the eccentric sleeve 4 symmetrically with respect to the lever 8. The BINDING node of the eccentric unit 2 with shaft 1 is made in the form of two ratchets, each of which has a ratchet wheel 10 connected with the shaft 1, and the dog 11 is articulated with the axis 12, mounted on the disk 13, mounted on the corresponding eccentric. The communication unit of the eccentric unit 2 with the frame 5 is made in the form of two disc brakes, in

When the shaft 1 rotates in the direction opposite to its rotation during the working stroke of the slide, the eccentric sleeve 4 rotates relative to the eccentric block 2, changing the overall eccentricity, i.e. the amount of stroke of the slide. After that, the supply of energy to the pneumatic cylinders 14 is stopped. 5 Il.

Each of the KOTopitx housings of the pneumatic cylinder 14 is connected to 5, and the movable element 15 is spring-loaded via a spring 16 relative to the body of the pneumatic cylinder 14. The dog 11 is spring-loaded via a spring 17 relative to the disk 13. A flywheel 18 is mounted on the shaft 1.

The device works as follows.

At working strokes of a slider (not shown), rotation from the flywheel 1B is transmitted through shaft 1 to lever 8 and far. through the axis 6 to the eccentric sleeve 4, as well as through the shaft 1 to the ratchet wheels 10, the pawl 11, the wheels 13 and the eccentric block 2.

Thus, the rotation of the shaft 1 is converted through the connecting rod 3 into the reciprocating movement of the slide.

If it is necessary to control the stroke of the slide, compressed air is supplied to the pneumatic cylinders 14, while the movable elements 15 of the pneumatic cylinders 14 are pressed against the discs 13, resulting in the eccentrics of the eccentric block 2 stopping the base 5 against rotation of the shaft 1 in the direction opposite to its rotation the slide stroke, the eccentric sleeve 4 rotates relative to the eccentric block 2, changing the overall eccentricity, i.e. the amount of stroke of the slide. After that, the supply of energy to the pneumatic cylinder I 14 is stopped, and the springs 16 return the movable elements 15 of the pneumatic cylinders 14 to their original condition, freeing the discs 13.

The technical and economic effect of implementing the invention is ensured by increasing reliability.

Claims (1)

Invention Formula A device for adjusting the stroke of a ram of a crank press, comprising an eccentric unit mounted on a shaft, placed in a connecting rod with an eccentric block encompassing an eccentric sleeve, as well as communication nodes of an eccentric block with a shaft and base and eccentric sleeve with a shaft, characterized in that increasing the reliability, the communication unit of the eccentric bushing with the shaft is made in the form of an axis with a socket mounted in the eccentric bushing and a lever fixed on the shaft and mounted with its shoulder in the said nest e, ten 2 in the eccentric sleeve symmetrically with respect to its ends, the cavity for accommodating the lever, the eccentric unit is designed as two eccentrics installed in the eccentric sleeve symmetrically with respect to the lever, the communication unit of the eccentric unit with the shaft is made in the form of two ratchet mechanisms, in each of which one of its elements is articulated with the shaft, and the other with an eccentric, while the communication node of the eccentric unit with the frame made in the form of two disc brakes, in each of which one of its elements is articulated with a frame, and the other with an eccentric. Aa 17 15 5 FIG. FIG. five