SU768593A1 - Apparatus for assembling threaded connections - Google Patents

Description

3

catfish, and a thrust installed in the housing with the possibility of axial movement by means of an actuator and having a screw groove for a pin mounted on the reverser switch stem, while the housing has the possibility of axial movement from the drive, the allen key is mounted on the spindle with axial movement and interaction with the sensor via an annular protrusion formed on its outer surface, and the sensor output is connected to the body and thrust actuators by means of a control system comprising a series of blocks providing unra Driving depending on the position of the socket wrench relative to the housing.

FIG. 1 shows a general view of the device; in fig. 2-section A-A of FIG. one; in fig. 3 is a block diagram of a control system. A device for assembling threaded connections includes a housing 1, in which an air motor is placed with a striking mechanism 2. A housing 1 is attached to a shank 3. A connector 4 and a pipe 5 serve to supply air from a pneumatic network to a pneumatic motor with a hammer mechanism rotating spindle 6. Spindle 6 is installed with the possibility of axial movement of the Allen key 7, spring-loaded spring 8. On the housing 1 is mounted a bracket 9 that carries the sensor 10 for monitoring the position of the Allen key 7 relative to the housing 1. There is also a switch in the housing 1 a reverse with a rod 11 and a reverse ring 12 with channels 13. A reverse switch with a rod 11 can be rotated and, depending on its position, air is supplied to one of the two channels 13, providing a correct or "left spindle rotation."

In the shank 3 there is installed a ha ha 14, which is fixed against turning by a spindle 15, which slides over a groove of 16 tons g 14 when it is axially displaced. In addition, a screw groove 17 is made on the t 14. The pin 18 is pressed into the rod 11 and enters the screw groove 17. When the thrust rod 14 moves axially, the pin 18 slides along the screw groove 17, turning the rod 11 through an angle of 90 °. reversing the direction of rotation of the spindle 6. The axial movement of the rod 14 is carried out by an individual drive (not shown) behind the head 19.

The end wrench 7 has a depression 20, the shape of which corresponds to the shape of the leading element of the part being wrapped (bolt, nut, etc.), and an annular protrusion 21 opposite which the sensor 10 controlling the position of the end wrench 7 relative to the housing 1 is located. The sensor for monitoring the position of the socket wrench relative to the housing can be used for contactless sensors of various types: luminating, inductive, etc. In FIG. Figure 1 shows the structure of a device for assembling threaded connections using an inkjet sensor for monitoring the position of an allen key. For this, sensor 10 is connected via hoses 22 and 23 to connectors 24 located on flange 25, to which air from a measuring pneumatic network is supplied from a pressure source (not shown), which is a unified air preparation unit for measuring

devices.

To implement the automatic control of the drives of movements of the case and the thrust and control the quality of the threaded connection, the control system

includes serially connected blocks for converting the signal from sensor 26 and isolating an alarm 27, a decisive block 28 and a block 29 for driving the housing and the thrusters. Wto

The block input block 27 is associated with the output of the threshold setting block -30.

The device works as follows.

The device for assembling the threaded connections, installed by the shank in the executing body of the automatic manipulator (not shown), moves to the working position and the command to perform the screwing operation is given. The compressed air from the pneumatic system flows to the connector 4 and further along the pipeline 5 to the air motor with a hammer mechanism 2, which rotates the rotor 6. At the same time, the signal 1 of the drive control unit 29 together with the actuator of the manipulator moves in the axial direction. This movement is also carried out when, due to any reasons for screwing.

does not occur, for example, the bolt is jammed. In this case, the Allen key 7, remaining stationary in the axial direction, with its annular protrusion 21 interacts with the sensor 10, which continues to move along with the housing 1. In this case, the pressure in the measuring pneumatic network rises, the sensor signal converter 26 is activated, the output of which, after comparing block 27 with a threshold signal from block 30 enters decision block 28. Block 28 generates a command signal to stop the axial movement of body 1 for a specified time. Under the influence of these signals, the drive control unit 29 brakes and stops the axial movement of the housing.

If, after some exposure, the sensor signal will be removed due to

that the allen key moves together with the screwed element (the annular protrusion 21 of the allen key 7 opens the sensor), the decisive block 28 commands the block 29 to further axially move the body to a predetermined fastening depth. If, at the end of the time delay, the sensor 10 for monitoring the position of the socket wrench relative to the housing remains off, the decisive unit 28 generates a control command for the unit 29 to axially move the rod 14 and reverse the axial movement of the case 1. When the rod 14 moves in the axial direction, the pin 18 slides along the screw slot 17, turning together with the switch 11 of the reverse switch at an angle of 90 ° and thereby changing the direction of rotation of the spindle 6. Reverse the direction of rotation of the threaded element cient and axial movement of the dismantling device provides compounds defective.

In this way, the technological capabilities of the proposed device for assembling threaded connections are enhanced by synchronizing the axial movements of the screwed-down threaded element and the device body, and the rejection of the rejected connection is ensured.

Claims (3)

1. USSR Author's Certificate No. 565804, cl. In 23 R 19/06, 01.04.76. 2. USSR author's certificate number 565805, cl. In 23 R 19/06, 22.04.76. 3. Gelfand M. L. and others. Assembly of threaded connections, M., 1978, p. 89-90. t: s: