SU769297A1 - Semiautomatic device for checking threads - Google Patents

Description

(54) SEMI-AUTOMATIC MACHINE FOR MONITORING THREAD

one

The invention relates to the field of measurement technology, namely, devices for semi-automatic thread control with a complex caliber.

A semiautomatic machine for controlling threads is known, which contains a spindle bearing a gauge and a drive and mechanism for axial movement of spindle 1 mounted on a frame.

A disadvantage of the known device is the need to apply significant torques to the cal-ibra when monitoring threads made on thin-walled pipes, which have deviations from the correct shape, which leads to damage to the controlled thread.

The aim of the invention is to repair damage to the controlled thread.

 This goal is achieved by the fact that the semiautomatic device is equipped with two ratchet mechanisms with oppositely directed dogs and two differential-cam mechanisms, including paired disk cams, freely mounted on the spindle and kinematically connected by means of the ratchet mechanisms with a drive, with the cams that interact with them are located on the spindle, i-boiky that cherey

The springs located in the guide bushes act on the spindle.

  FIG. 1 shows a semiautomatic device for controlling threads; in fig. 2 is a section A-A of FIG. one; in fig. 3 is a section BB of FIG. one.

The motor / semiautomatic device has an electric motor 2, a gear reducer 3, a shaft-gear 4, a spindle 5, final switches 6 n 7. Differential-cam mechanisms 8 and 9 are located on the spindle 5, a complex threaded gauge W, a spring - //, the axial movement mechanism of the spindle in the form of a drum cylindrical cam 12 and a fixed roller 13. The differential cam mechanism 8 contains two parallel-mounted flat disk cams 14 with profile sections, roller pusher jams / 5, and helical cylindrical e springs / 5. The latter are located in the guide bushes 17 and are rigidly connected at one end to the spindle 5, and to the other to the pusher mi strikes 15. Disco "

The 25 cams 14 sit loosely on the spindle and are kinematically connected with the gear wheels. 18 through the ratchet mechanism 19.

The differential cam mechanism 9 includes the same structural elements as the mechanism S, namely: disk cams 20, thick jaws 21, helical coil springs 22, guide sleeves 23. The cams are connected to gears the wheels 24 through the ratchet mechanism 25. The difference between the mechanisms 8 VI 9 lies in the fact that the disk cams 14 and 20 are located on the spindle with the opposite direction of the junction of the profile sections. On this basis, the ratchet mechanisms 19 and 25 have oppositely directed dogs, which are selectively activated depending on the direction of rotation of the drive.

The monitored pipe 26 is mounted on a prism 27 and clamped by a band brake 28.

Semiautomatic works as follows:

In the mode of screwing in the caliber 10 on the controlled tube 26, a differential cam mechanism 8 is involved. The rotation from the electric motor 2 through the gear reducer 5, the shaft 4, the gear wheel 18 and the ratchet mechanism Yu is transmitted to the flat discs 14 and further through the springs 16 onto the spindle 5. The spindle 5 rotates the caliber 10 and the cylindrical cam 12. The last thanks to the screw slot through the spring 11 sorbs additional axial movement of the spindle 5 to the output of the roller 13 from the screw slot. If the threaded threads of the gauge and the pipe do not coincide, the axial movement of the spindle is stopped by pressing the spring 11 and. later resumes after coupling the monitored thread with a gauge. When checking the fit, the details of the gauge goes through all the threads to the end. If the moment of resistance to the rotation of the caliber exceeds the value specified by the parameters of the differential cam mechanism, the semi-automatic changes from rotational to rotational-impact. screwing mode. At the same time, the rollers of the pushers 15 are rolled over to the profile sections of the cams 14, having stretched the springs. Breaking off the profile, the pushers-strikers 15 alternately strike the spindle 5 with the spring 16. The elastic deformation waves arising in this process pass through the threaded connection and reduce the torque of rotational rotation of the gauge by reducing the threads in the thread and correcting the cross section of the pipe.

When the .10 caliber is seized, the semiautomatic device switches to the impact mode of operation, i.e., the rotation of the cams is completely transformed into a reciprocating movement of the tappets. In this case, spindle J5 stops, which serves as a signal to the machine operator that the part is unsuitable, and it starts the reverse rotation of the electric motor.

In the mode of unscrewing the gauge, the mechanism 9 participates. In this case, rotation from the electric motor 2 through gear reducer 3, gear shaft 4, gear wheel 24, ratchet mechanism 25 is transmitted to flat disc cams 20 and further through springs 22 to shnindel 5. At stop The caliber in the end protrusion in the threaded joint is created by tension, and therefore, at the beginning of the unscrewing process, the semiautomatic device works in shock mode. After wedging the threaded joint, the process proceeds in the reverse order of

considered above. In the reverse drive mode, the limit switch 6 is activated and the motor stops.

As a result of the work of the semiautomatic machine, the screwing ability of the caliber with the counter ".- about

threaded, i.e., the process proceeds faster and with lower values of the circumferential forces, the reliability of ontrol also increases.

Claims (1)

1. USSR author's certificate No. 288318, cl. G 01 В 3/48, 1969 (prototype). -sfr% T 7/777777 // 7777 //////////////////////////// // // l i G :, g 15 of FIG. 7 J8 Fuzz. 3