SU1414548A1 - Arrangement for automatic change of tools of metal-cutting machine - Google Patents

Abstract

The invention relates to the field of machine tools and can be used in machine tools of various types. The purpose of the invention is to reduce the size of the device. For this, the tool magazine has a drum 4 with longitudinal grooves 5, in which tools 6 are placed, held by an elastic ring 7. In the cavity of the drum 4 mounted on the case body 1, a slider 9 with a gripper 10 is mounted, moving in the direction of the windows 8 located in the middle part of the longitudinal grooves 5. The rotation of the drum 4 is carried out by the pawl 13 mounted on the shaft 12, which is connected through the springs 18 and 19 to the levers 16 and 17 interacting with the copiers 20 and 21 mounted on the slider 9. The gripper 10 is madea clamping lever, provided with projections cooperating with a spring-loaded wedge mounted on the arm actuator rod of the hydraulic cylinder. 2 hp ff, 3 ill. Q (L

Description

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The invention relates to a machine tool industry and can be used in machine tools of various types.

The purpose of the invention is to reduce the size.

FIG. 1 shows the device, a general view; in fig. 2 - capture; in fig. 3 - layout of the device with a cutting machine.

The device for automatic tool change contains a tool magazine, the case 1 of which is mounted on the crown of the swivel hydraulic cylinder 2 mounted on the support 3 of the machine. The housing 1 has a rotary drum 4 with sockets in the form of longitudinal grooves 5 in which the tools 6 are located. The elastic ring 7 prevents the tool from falling out. In the middle part of the longitudinal grooves 5, windows 8 are made. In the cavity of the drum 4, a slider 9 is installed with the possibility of reciprocating movement along the axis of the drum 4. On the slider 9 a gripper 10 is installed with the possibility of reciprocating movement in the direction perpendicular to the axis of the drum 4. Movement slider 9 and gripper 10 is provided from hydraulic cylinders (not shown). In the right extreme position of the slide 9, the return stroke of the gripper 10 is limited by the stop 11 mounted on the housing 1.

A shaft 13, hinged by the action of spring 14 in engagement with the ratchet wheel 15 of drum 4, and levers 16 and 17 connected to shaft 12 through springs 18 and 19, respectively, are pivotally fixed on the shaft 12 mounted in the housing 1. The levers 16 and 17 interact with the copiers 20 and 21 mounted on the slider 9. The gripper 10 has clamping levers 22 with protrusions 23. In the cavity of the stem 24 of the arm drive hydraulic cylinder, there is a spring 25 and a wedge 26 interacting with the protrusions 23 of the clamping levers 22. On the caliper 3 machine tool located spindle 27.

The device works in the following way.

During the processing of the workpiece, the rotary drum 4 mounted on the housing 1 is retracted from the instrumental UJHHH-case 27 (position A). The slider 9 is in the right extreme position (Fig. 1) and, acting on the dog 13, disengages it from the ratchet wheel 15. The clamping levers 22 are decompressed by the force of the spring 25 transmitted through the wedge 26 to the protrusions 23.

Upon receipt of the tool change command, the swiveling hydraulic cylinder 2 (FIG. 3) brings the drum 4 to the instrumental spring 23 (position B) and the tool 6 installed in it falls into the longitudinal groove 5, in window 8 of which

the gripper 10 is located. When the vane 24 moves, the latter interacts with the clamping levers 22, which clamp the tool, after which the slider 9 moves to the left, removing the tool from

shpindl 27. When moving the slider 9 to the left, the dog 13 under the action of the spring 14 engages with the ratchet wheel 15, and the lever 16, interacting with the cam 20, twists the spring 18, the transmitting force

0 rotation through the shaft 12 and the dog 13 on the ratchet wheel 15 of the drum 4. The gripper 10, located in the window 8 of the drum 4, prevents it from turning. In the left extreme position of the slider 9, when the tool shank is pulled out of the pin, and its vertex

5 is located under the spring ring 7, the rod 24 moves to the left, releasing the clamping levers 22, as a result of which they are opened under the force of the spring 25. With further movement of the rod 24, the gripper 10 is removed from window 8 and the dog 13 places the drum 4 in the next position. After that, the slider 24 is moved to the right, extending the grip 10 into the window 8 of the longitudinal groove 5 in which the new tool is located. When the blade 24 is engaged with the clamping levers 22, the tool is clamped, after which the slider 9 moves to the right, sending the tool to the machine's spindle. When the slider 9 moves to the right, the lever 17, interacting with the cam 21, twists the spring 19, transmitting the turning force of the dog 13. When the slider 9 reaches the right extreme position, as a result of pressing the lower dog 13, the latter is disengaged from the ratchet wheel 15 and under the action spring 19 returns to

5 starting position. Next, the shaft 24 is retracted to the left, the levers 22 open, and the stop 11 limits the movement of the gripper 10, preventing it from withdrawing from the window 8, after which the rotary hydraulic cylinder 2 retracts the machine to its original position.

Claims (3)

1. Device for automatic tool changer of metal cutting machine, 5 with () a tooling shop, comprising a body and a mounted reversing drum with jacks for the engine, located with the possibility of moving to the tool shaft and aligning the axis of the tool socket, under the shift, with the axis of the pin, as well as the tool for reloading the tool from the magazine to the spindle and vice versa, including a slider mounted for movement from the drive parallel to the axis of the tools and interacting with 5 last through the windows in the drum, and, moreover, the drives for moving the body and turning the drum, and the mechanism for fixing the tools in the recesses of the drum, characterized in that, in order to reduce dimensions, the slide with its drive moves on the case of the magazine and is equipped with a grip, placed on a slider with the possibility of transverse movement from an additional drive, and the drum turning drive is made in the form of a ratchet mechanism, copiers mounted on the slider, and installed in the magazine case parallel to the axis of rotation the shaft of the shaft on which levers are placed with the possibility of relative rotation, each of which is connected to the shaft by a torsion spring and is positioned to be in contact with a corresponding slider cam, and the ratchet pawl is mounted on an axis fixed on said shaft with the possibility of interaction with the ratchet the wheel of this mechanism, rigidly connected with the drum, and the slide in one of its extreme positions. 2. The device according to claim I, characterized in that the grip is made in the form of a slide placed in the guides with the possibility of limited movement of the carriage with clamping levers and connected with the drive rod with a wedge spring-loaded with respect to it, with In this case, the magazine body is provided with a casing, and the carriage is provided with a protrusion placed with the possibility of interaction with the stop and the slider in the initial position of the slide and carriage. 3. The device according to claim 1, characterized in that the mechanism for fixing the tools in the socket, dah of the drum is made in the form of an elastic ring placed in the groove on the outer surface of the drum, which is in contact with the side surfaces of the tools. // 10 9 2.5 2 FIG. g