SU379359A1 - DEVICE FOR AUTOMATIC TRANSFER OF TOOL - Google Patents

Description

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The invention relates to a machine tool industry and can be used in multi-machine tools for complex machining of parts such as a machining center.

In machines of this type, the axis of the tool magazine is perpendicular, and the axis of the tool change lever is parallel to the machine spindle. With this arrangement of the machine in the system of automatic change and the instrument, there is always an automatic transmitting device that extracts the tool from the tool magazine socket, turns it by 90 ° and brings it into the operating area of the tool change lever.

In this device, the fixing of the angular position of the tool, the clamping of the tool holder, the removal of the tool magazine from the socket and the rotation of 90 ° are carried out by separate hydraulic cylinders. The sequence of action of the hydraulic cylinders is provided by commands from spools with electric control. A disadvantage of this device is the possibility of disrupting the sequence of action due to the absence of rigid communication between the actuators.

The proposed device differs from the known one in that an axis is fixed in its housing. carrying freely mounted on it

A rotary lever with guides and a gear-lever connected to the hydraulic cylinder rod and a movable sponge located in the guides of the rotary lever, in the holes of which there are balls alternately closing the lever with the housing and gear-lever. These differences make it possible to provide all of the above actions from one hydraulic cylinder.

FIG. 1 shows the proposed device in the initial position, a longitudinal section and a section along LL; in fig. 2 - the same, in position, turned by pa 90 °, and the section along

Bb

A hydraulic cylinder with a rod-rod 4f is installed in the housing / device with holes 2 made in it, and the axis 5 and the i5 stop are fixed. A new lever 7 is freely mounted on the axis 5, on which the fixed sponge 8 is fixed, the cams // and 12 with grooves / 5 and M, preloaded with springs / 5 and / 5; between the jaws in the hole is the hinge 17, in the holes of the cheeks

/ 5 and 19 - balls 20 and 21. On this axis, 5 swaddles with cheeks / 5 and 19 of the swivel lever 7, the gear lever 22 is freely seated with a groove 23 and holes 24 and 25, connected through the rod rail 4 to the hydraulic cylinder 3 and through rusk 25 and axle 27 with movable sponge 28.

The movable sponge 28 is located in the guides of the pivot arm 7, it is equipped with a latch 29 with a spring 30 and pins 31 and 32, which fix the angular position of the sleeve 33 with the tool 34 having a shank 35 in it. The sleeve 33 is freely installed in the slot of the tool magazine 36 on pin 37.

In the initial position, the pivoting lever 7 stands vertically, the rod-rod 4 is extended, the movable sponge 28 is lowered and does not prevent the rotation of the tool magazine 36.

To transfer the tool into the zone of action of the tool change lever, the pull-rod 4 must be moved to the right. At the same time, in the initial period of movement of the rod rack 4, the pivoting lever 7 remains uncontrolled, kept from turning by the balls 20 and 21 simultaneously entering the holes of the cheeks 18 and 19 and the hole 2, and the movable sponge 28 connected to the gear slot 23 the lever 22 through the cracker 26 and the axis 27 moves.

When moving the movable jaw 28, the pins 3 and 32 enter into the holes of the sleeve 33, lift it, remove it from the pin 37, and bring it to the fixed jaw 8. In this polish, the latch 29 becomes against the cam 12, reliably locking the tool 34 from falling out rotation, and the wells 24 and 25 of the gear lever 22 become opposite to the balls 20 and 21. Since the further movement of the movable jaw 28 is limited to the fixed jaw 8, and the balls 20 and 21 can freely move into the wells 24 and 25, linking the swivel lever

7 with a gear-lever 22, then further movement of the rod-rod 4 rotates the device up to the stop 6. In this position, the cam 11 is moved to its extreme position and

groove 13 coincides with the axis of the ball 17; the tool 3 is held by the spring 16, to extract it, an axial force is applied, which is necessary to compress the spring 16. After replacing the tool, the device is returned to its original position by extending the rod-rod 4.

Subject invention

A device for automatically transferring a tool on machine tools such as a machining center with a mutually perpendicular arrangement of the tool magazine axis and tool change lever axis, fixing the angular tool shaft, removing the tool from the magazine, holding it and turning it 90 from separate drives, for example hydraulic cylinders, differing from by the fact that, in order to provide all of the above actions from a single cylinder, the axis of the device is fixed, carrying freely mounted thereon the pivot arm with the guide lever and gear-connected to the rod of the hydraulic cylinder and a movable jaw arranged in the pivoting lever guide, in the holes of which are arranged balls alternately closing lever with the housing and gear-lever.

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