SU1439563A1 - Device for controlling actuators - Google Patents

Abstract

The invention relates to mechanical engineering. The device for controlling the actuating mechanisms comprises a housing 1, a block 2, cam X of a tree 3-5, an actuator 6, pushers 7-9. Improved performance is achieved by the fact that at least one of the camshafts (5) is provided with an additional cam 14 and a pusher 15 rigidly connected to the axis 16 of the pusher 9 of this camshaft 5, and the length of the pusher 15 is less than the length of the pusher associated with it 9 and the cam 14 is mounted on the shaft 5 with the possibility of sliding relative to the shaft 5 in the axial direction. 2 or

Description

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The invention relates to mechanical engineering and can be used in control systems.

The aim of the invention is to improve the performance.

Fig. 1 schematically shows the structure of the device; Fig. 2 shows the arrangement of cams and tappets.

The device for controlling the actuating mechanisms comprises a housing 1, a block 2 of camshafts 3-5 connected with the drive 6, each of which installs a tool 19 through pushers 7-9 -kinematic 10-12

associated with the corresponding actuator 10-12, while the block 2 of the cam shaft 3-5 is mounted with the possibility of axial movement relative to the pushers 7-9 and fixation in one of the positions, the number of which corresponds to the number of cams 13 on each cam shaft 3-5. One of the camshafts (5) is provided with an additional cam 14 and a pusher 15 rigidly connected to the axis 16 of the pusher 9 of this camshaft 5, the length of the additional pusher 15 being less than the length of the pusher 9 associated with it, and the secondary cam 14 is set to shaft 5 with the ability to slip relative to the shaft 5 in the axial direction.

The device is connected to the power head 17 of the machine with its actuators (carriages) 10-12 for movement on three axes of the turret 18 mounted on the carriage 11 with machining 20

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on the revolving drum 18 to the starting treatment position, determined by the cam profiles 13 of the camshafts 3-5. Then the tool 19 makes a working stroke at the expense of the corresponding sections of the profiles of the cams 13 on the camshafts. After finishing the processing, the tool 19 is removed from the workpiece 30. The retraction of the tool 19 is necessary for changing it by rotating the revolving drum 18. To improve the reliability, retracting the revolving drum 8, i.e. the carriage 11, on which this drum is mounted, is carried out by raising the profile of the cam 13, kinematically, overcoming the force of the force closure organ — spring 20,

After the withdrawal of the tool 19 mounted on the revolving drum 18 from the workpiece 30 to the additional pusher 15, rigidly connected with the pusher 9, the profile of the additional cam 14 is suitable for lifting (FIG. 2). On further growthAfter the output of the tool 19 mounted on the revolving drum 18 of the worked out part 30 to the additional pusher 15 rigidly connected with the pusher 9, the additional cam profile 14 is suitable for lifting (FIG. 2). With further growing tools 19. The carriages 10-12 are equipped with power elements for powering the cam shaft 5 and the cam 14 cam, for example, springs 20. On the net pushers 9 and 15, they take the position of equal-21 devices placed shaft 2 -5, Cam shafts 4 and 3 are connected by pushers 7 and 8 and kinematic chains 22 and 23 to carriages 10 and 1.2, respectively. The cam shaft 5 through the pusher 9, the axis 16, the lever 24, t gu 25 and the horn 26 is connected with the carriage 11, an additional cam

shown in FIG. 2 by a dotted line. In this position, the pusher 9 is in the position set aside from the profile of the cam 13 of the shaft 5 due to the larger amount of lift on the profile of the cam 14 and the greater length of the pusher 9, the Cam 14 duplicates all the cams 13 of the shaft 5 in the idle zone, i.e., retraction - approach. This is necessary because for all programs of movement the carriage 11 after moving the tool out of the workpiece. (i.e., in the idle zone) moves in the same way: retraction - pause - inlet,

14 is connected to drive 6.

In order to move and fix the block 2 of the cam shafts 3-5 in positions determined by the distance between the cams 13, the block 2 is equipped with an actuator, for example, a pneumatic cylinder 27 with stop blocks 28 and control electromagnets 29. The tool 19. interacts with the machined detail 30.

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The device works as follows.

In the initial position, the carriage 11 with a revolving drum 18 is retracted from the workpiece 30, the drive 6 of camshafts 3-5 is turned off, At the right moment determined by the program

mine, the drive 6 is turned on. The cams 13 of the camshafts 3-5, as they rotate through the pushers 7-9, drive the carriage 10-12 of the power head 17 in the approach-working stroke-retraction-pause mode. During carriage

on the revolving drum 18 to the starting treatment position, determined by the cam profiles 13 of the camshafts 3-5. Then the tool 19 makes a working stroke at the expense of the corresponding sections of the profiles of the cams 13 on the camshafts. After finishing the processing, the tool 19 is removed from the workpiece 30. The retraction of the tool 19 is necessary for changing it by rotating the revolving drum 18. To improve the reliability, retracting the revolving drum 8, i.e. the carriage 11, on which this drum is mounted, is carried out by raising the profile of the cam 13, kinematically, overcoming the force of the force closure organ — spring 20,

After the withdrawal of the tool 19 mounted on the revolving drum 18 from the workpiece 30 to the additional pusher 15, rigidly connected with the pusher 9, the profile of the additional cam 14 is suitable for lifting (FIG. 2). Upon further rotation of the cam shaft 5 and cam 14, the pushers 9 and 15 occupy the position

cia shaft 5 and cam 14 pushers 9 and 15 occupy the position

shown in FIG. 2 by a dotted line. In this position, the pusher 9 is in the position set aside from the profile of the cam 13 of the shaft 5 due to the larger amount of lift on the profile of the cam 14 and the greater length of the pusher 9, the Cam 14 duplicates all the cams 13 of the shaft 5 in the idle i.e., retraction - approach. This is necessary because for all programs of movement, the carriage 11 after moving the tool out of the workpiece. (i.e., in the idle zone) moves in the same way: retraction - pause - inlet,

Pushers 7 and 8 in this position (Fig. 2) are located in the depressions of the cams 13 of shafts 3 and 4 with a gap relative to the profiles of the cams 13, This;

is ensured by the fact that the carriages 12 and and 10 are at this time in the retracted position under the action of the force-closing springs 20. During the pause, which begins after the end of the retraction, a tool change is performed according to the program, i.e. turning the revolving drum 19 and, if necessary, changing the control cam programs. For this, the actuating pneumatic cylinder 27 moves the block 2 with camshafts 3-5 from one block 28 to the other. Under the pushers 7-9, the number of cams 13 that is programmed will appear. And this series is determined by the choice of block selection block 28, to which block 2 is pressed by pneumatic cylinder 27 and the position of this block 2, which depends on electromagnet 29 (it can be turned on or off). Cam programs change during rotation of the revolving drum 19 (during the tool change) and does not affect the increase in auxiliary time, i.e. does not cause loss of performance.

: Continuation of rotation or new switching on after cam stops

F1 / G.2

3-5 shafts will resume the movement of the power head 3 already under the new program.

Claims (1)

5 claims A device for controlling the actuators, comprising a housing, a block of camshafts connected to the drive, each of which is connected via a pusher to one nematically; appropriate executive mechanism mom, with a block of camshafts mounted with the possibility of axial movement relative to the pushers and fixing in one of the positions, the number of which corresponds to the number of cams on each camshaft, characterized in that, in order to improve performance, at least one of the camshafts is provided with an additional cam and pusher connected with the axis of the pusher the camshaft, the length of the additional pusher is less than the length of the pusher associated with it, and the additional cam is mounted on the shaft with the possibility of slipping relatively shaft axial direction.