SU916218A1 - Stand for tightening castle nuts - Google Patents

Description

The invention relates to the tooling of the mechanical assembly production, in particular to devices for assembling threaded connections.

A device for tightening the crown nuts, containing a mechanism for tightening the nuts with a periodic actuator and a control system with limit switches and a torque control sensor (T 3), is known.

The disadvantage of this device is that it does not provide the required accuracy of combining the hole and groove in the assembled threaded connection, which reduces the quality of the assembly -. ki

The purpose of the invention is to improve the quality of the assembly.

This goal is achieved by the fact that the stand for tightening the crown nuts is equipped with a safety gear with a flag and a mechanism for turning the nuts.

ten

15

20

containing a ratchet with translation and connected through the control system with the mechanism of tightening the nuts, and the safety device flag is set with the possibility of sequential interaction with the limit switches.

FIG. 1 shows a schematic stand; in fig. 2 - section AA

figure 1; in fig. 3 - section BB on

figure 1; in fig. 4 - section bb in

figure 1; in fig. 5 - threaded connection assembly.

A device for tightening threaded connections consists of a frame 1 on which a nut tightening mechanism is installed on a rod consisting of a body 2 with a ratchet mechanism installed in it 3> A spindle 4 having a slot 5 for a turned-on nut 6 is installed in the splined opening of the ratchet mechanism 3 products 7, installed in the device 916

8. The spindle drive is carried out from the power cylinder 9 ·

The spindle 4 has a housing 10, limited from axial movement by a retaining ring 11, and from a radial movement by a limiting rod 12 entering the opening of the housing 2. The housing 10 has a safety device 13 in the form of a rod, 'in diameter equal to the diameter of the hole in the threaded connection of the product 7 · The safety device 13 has a flag 14, interacting with the limit switches 15 and 16. The safety device 13 in the upper position is held by the latch 17, the removal of which is carried out by an electromagnet 18.

The base 1 also has a mechanism for turning the threaded rod into a nut, comprising a housing 19 in which the spindle 20 is coaxially mounted with the spindle 4. At one end of the spindle 20, a nozzle 21 is installed to fix the non-threaded end of the rod, and at the other end a lever 22 interacting with rod sensor 23 control torque and made in the form of a hydraulic cylinder, rodless cavity of which is connected with the electric contact pressure gauge 24.

Sensor 23 through screw kinema- 25; Chesky connected with the gearbox 26, on the VA- ^: lu which is installed ratchet 27 driven by the power cylinder 28.

The stand works as follows. Product 7 is installed on

the device 8. On the threaded rod of the product 7 is set the nozzle 21, while the lever 22 rests on the stem of the sensor 23, which is in its highest position. The catcher 13 is set to the upper position and held by the latch 17 ·

Screw nut 6 is installed in the slot 5 of the spindle 4, which is fed to the end of the threaded rod of the product 7 and manually turning it is baited nut 6.

Pressing the "Start" button will automatically tighten the nut 6 to a predetermined tightening torque.

After that, the power cylinder 9, making a reciprocating motion, rotates the spindle 4 at a predetermined angle, while the tightening force through the threaded connection of 214 4

Delia is transmitted to the spindle 20, which through the lever 22 acts on the rod of the sensor 23. This rod compresses the fluid in the rodless cavity of the Q _{5 of the} cylinder 23, and the pressure is controlled by an electrocontact pressure gauge 24, the value of which determines the amount of tightening of the threaded connection. Contact Electrical Pressure Gauge

U set at the required torque.

After reaching the set torque, the contacts of the manometer 24 are closed, after which the manda is supplied to the electromagnet 18, which, by pulling the latch 17, releases the safety device 13 — The safety device drops down, falling into the hole of the nut 6 and rests against the threaded end of the rod of the second 7. Check box 14 of the safety device 13 closes the contacts of the limit switch 15, commanding the operation of the turning mechanism, whose power cylinder 28, performing reciprocating motion through the ratchet 27, gear 26 and screw

25, acting on the sensor 23 and the lever 22, rotates the spindle 20. The spindle through the nozzle 21 produces ₃₀ turning the stem of the product 7 until the holes of the rod and the nut are aligned. The safety device 13 falls into the hole of the rod, and the flag 14 closes the contacts of the final switch _{35 of the} body 16, giving the command to turn off all the mechanisms of the stand.

After the end of the cycle, the catcher ’‘ 13 rises to its original position,

removed the nozzle 21, spindle 4

40

retracted and removed from the stand.

The application of the proposed device when tightening crown nuts can improve the accuracy of the alignment of the holes, which makes it possible to improve the build quality of threaded connections.

⁵⁰

Claims (1)

Claim A stand for tightening the crown nuts, which contains a tightening mechanism for the nuts with a periodic actuator ^{, a five-} turn actuator and a control system with limit switches and a torque control sensor, which is designed so that improving the quality of the assembly, it is equipped with a safety gear with a flag and a screw-in mechanism for connecting the nuts connected through the control system with the mechanism for tightening the nuts, and the safety gear flag is set to 916218 sequential interaction with the limit switches.