SU1447474A1 - Coldroll-forming mill - Google Patents

Abstract

The invention relates to the processing of metals by pressure, in particular, to equipment for the production of curved products (rolled steel. The purpose of the invention is to increase the reliability of the mill and the bending mill. The roll forming mill contains workpieces and 7 7 1 / /. The shafts between the cyclle and the mill disconnection system from torque overloads with sensors. Each articulated shaft is designed as universal joints and flange coupling halves connected by a shear safety pin and installed coaxially with Each sensor is made in the form of a cylindrical cup 30 with windows in its wall and a spring-loaded cylindrical limit switch 32 with a stop pin 33. One switch 32 is located in the bore of the cup. One of the coupling halves of the hinge shaft is mounted on the output shaft of the corresponding gear stand. it is fixed in another half coupling and connected with the system of the bending mill roll-off. The bending mill has an increased reliability in operation due to uniform distribution of the loads on each working shaft. 7 il. i ate 4; 4ik Jib 4

Description

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The invention relates to the processing of metals by pressure, in particular to equipment for the production of curved rolled sections.

The chain of the invention is to increase the reliability of operation of the roll forming mill.

FIG. shows a roll bar on the cage, a general view; Fig, 2 - articulated shaft with sensors, incomplete longitudinal section; on fig.Z - section aa jia 4mg.2; figure 4 - view b in figure 2; on fig.Z - section bb In fig, 4; figure 6 is a view of G in figure 2; 7 is a block diagram of a control device.

Pro4 1 bending mill contains gear 3 and 4 working stands on entrances 1 and 2 with entrances 5 and b, as well as articulated shafts 7 and 8 for transmitting rotation 5 and 6 of working stands. 4 from gear stands 3.

The articulated shafts 7 and 8 are located between the 3 and 4 cages and consist of ughaersaly typical cardan 9 mounted on the landing necks of the input {shh working shafts 5 and b of the spline rolls 10, connecting the universal carda 9 with the universal cardan 11, articulated with the floude semi-couplings 12 and 13. The universal cardan 9 consists of forks 14 and the joints of their crossings J5 mounted on rolling-pin studs with the ears 16 of the forks 4, made with outer holes in the hub 17.

The universal cardans 11 consist of forks 14 on the side of the splined roller 10, crosses 15, the pins of which are mounted on rolling pads in the lugs 16 and 8 with the possibility of rotation, which is a rigid element of the coupling half 12, the flange 19 of which is made with a bore under the flange 20 another coupling half 13.

The flanges 19 and 20 of the half couplings 12 and 13 are interconnected by a safety shear pin 21 at the maximum radial distance R from the axis of rotation of the flanges and 13.

The diameter d of the shear pin 2 depends on the magnitude of the allowable torque moment, the distance R from the axis of the pin 21 to the axis of rotation and the material of the pin defining its destruction

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General strength, in the central bore of the half-coupling 12, the axis 22 is rigidly fixed with the centering element 23, which sits on the landing of the 7-9 quartite in the bronze bushing 24, which in turn is pressed in the central bore of the half-coupling 13. To the flange 19 of the half-coupling 12 is attached the bolts of the rivet 25, which surrounds the closed cylindrical cavity, by which the coupling half 12 is kept from axial displacement relative to the coupling half 13, sitting its hub 26 on the output shaft of the gear stand 3 and rigidly fixed from the axial displacement bolt New mounting 27. Sensors 28 are fixed on hub 26 of half coupling 13 of each of the hinge shafts 7 and 8 with screws 29. The sensors consist of 26 glasses 30 fixed on the hub 30, inside of which are mounted spring-loaded sph) at 31 squeeze limit switches 32 with press fit with cylindrical pins 33 inserted in working position into annular grooves 34 of protrusions 35 on cover 25 of half-coupling 12 In the side wall of cups 30, grooves 36 are made to rotate pin 33 through the ° C angle required for inserting pin 33 when adjusting to the working position e in the annular groove 34 or output therefrom.

The limit switch 32 of the sensor 28 has the possibility of a radial stroke within the magnitude of the grooves 36, i.e. rotate the coupling half 12 and 13 to the center or from it to the brush contacts 37 block diagram of the device for monitoring the integrity of the safety pins 21,

The block diagram of the device for monitoring the integrity of the safety pins 21 includes sensors for cutting the pins 28, an amplifier 38 associated with the contacts 37, a commander 39 for stopping the roll forming mill, signal lamps 40 indicating the accident site of the hinge shaft of the mill from the first shaft to the last.

The amplifier 38 is designed to amplify the signal coming from the contact 37, turning off the drive of the bending mill through the command device 39 and including the signal lamps HL, Hb corresponding to the hinge shafts. en ”

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Brush contacts 37 hard zak-. resolved through their dielectric 41 on the brackets 42 to the body of the corresponding gear stand 3. On the coupling halves 12 and 3, risks 44 and 45 and a groove 46 are made to accommodate the locking strip 47,

The articulated shafts 7 and 8 transmit a rotational movement from the output ends of the shafts of the gear stands 3 to the working shafts 5 and 6 of the working stand 4.

When the permissible torque value is exceeded, one of the hinge shafts 7 and 8. In the process of operation, a destructive center of the safety pin of this hinge shaft occurs again.

After the safety pin 21 is cut, the half-coupling 13 flange on the corresponding shaft of the gear stand 3 continues. Rotation of the coupled coupling half 12 continues by continuing the working; movement of the profiled workpiece moved by the rolls of the stand (not shown) is already at a lower angular speed due to the speed equalization shaft with a cut pin, and this causes the mutual provocation of the flange coupling halves 12 and 13, as a result of which the thrust cylindrical pin 33 pops out of the annular groove 34 of the protrusion 35 but decelerated coupling half 12 and frees the spring-loaded limit switch 32, which under the action of the spring 31 makes a radial movement to the maximum distance from the axis of rotation of the coupling half 13 until it stops with a pin 33 into the outermost surface of the groove 36 of the cup 30. When reciprocating the coupling half 12 and 13 due to slow rotation the coupling half 12, the switch head 43 is in contact with the brush contact 37, which may be somewhat around the circumference of the sensor 28. The number and angular location of the contacts 37 is adjusted experimentally. At the moment of contact of the head 43 with the contact 37, a signal is sent to the amplifier 38, the signal is amplified and fed to the commander 39, which turns off the roll forming mill, and to the ignition, the corresponding signal lamp 40 indicating the accident site. When profiling from piece blanks in the absence of contact

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rolls in the field of the interval blanks shutdown roll forming mill occurs instantly.

Removing the cut pin 21 is performed by rotating the flanged coupling halves 12 and 13 until the alignment of scratches 44 and 45 in the groove 46 of the coupling half 12. Push the retaining bar 47 away, remove the parts of the destroyed pin 21, insert the new safety pin 21, close the locking bar 47 from falling out.

The sensor 28 is adjusted by turning the limit switch 32 by an angle ot, it is radially moved to the axis of rotation, overcoming the force of the spring 31, before moving the pin 33 to a position that ensures the reverse rotation of the angle 33 by inserting the pin 33 into the annular groove 34 of the stop lip 35 of the half-coupling 12 .

After the elimination of the consequences of the destruction of the safety pin 21 and the adjustment of the sensor, the bending mill is switched on to continue working.

The use of articulated shafts in comparison with the known ones increases the reliability of the bending units sa by equal distribution of loads on each 1st working working shaft. Each break of the shear safety pin turns off the bending mill with the help of sensors. The adjuster on the light panel clearly shows the place where the pin is cut. This ultimately drastically reduces the process of breakdowns in a profile-bending mill when piece pieces and other overloads get stuck, sock; saves the overhead of time associated with the sub-adjustment and repair of mills, increases the equipment load factor and improves the performance of the roll forming units and lines.

Claims (1)

Invention Formula A roll forming mill, predominantly of heavy type, containing gear and work stands, articulated shafts located between them and a system for disconnecting the mill from torque overloads with sensors and contacts of the circuit, in which each articulated shaft contains universal cardan and flange half coupling, interconnected section 51 he will protect the pin and installed coaxially with the possibility of rotation relative to each other by placing along its axis a centering element rigidly connected with one of the coupling halves and mounted in the bearing another along the coupling that is different in order to increase the reliability of the mill one of the flange coupling halves of each hinge shaft is mounted on the output shaft of the corresponding gear stand, the sensor is mounted on this coupling half and is made in the form of a cylindrical cup with grooves in the wall located inside 746 it has a final switch and is connected to the last stop pin with end sections, the exit is shchish. out of the grooves, while the other half of the coupling is provided with protrusions with annular grooves on the side facing the sensor, stop braces are installed in these grooves, the mill disconnection system is equipped with signal lamps connected to the respective hinge shafts, the contacts of the mill disconnection system are fixed on gears cages as well Each sensor is placed with the possibility of interaction with the said contacts. Aa FSHZ 7J . FIG. W in uJ pollutants tsh.5 39 biyg FIG, in Phage. 7