SU1234445A1 - Transfer machine for continuous working of broached articles - Google Patents

Description

2. Pop-1 assembly, characterized in that the guiding apparatus is made in the form of successively installed dampers with arc, radial grooves, the length of which is increased to the center of the damper of the distribution plate with radial holes and connected with it circular concentric nozzles, while the grooves in the valve, the holes in the plate and the annular channels of the pipes are coaxially filled, and the valve has the ability to rotate around its longitudinal axis, and the Invention itself relates to the production of rolled products and can be used It is used for heat treatment of strips and wires.

The aim of the invention is to expand the technological capabilities and improve the quality of processing products.

FIG. 1 is a diagram of a unit for continuous heat treatment of metal strips; in fig. 2 shows section A-A in FIG. one; in fig. 3 — node 1 in FIG. 2; FIG. 4 is a view B of FIG. 3 to the adjustable damper in a position where all channels of the guide vane are closed; Fig. 5 is the same; part of the channels of the guide apparatus is open; in fig. 6 - the same, all channels of the guiding apparatus are open; in fig. 7 is a section bb of FIG. one; Figs 8, 9, 10 and 11 schematically show the operation of the mechanism of the bifillary rewind of rolled products in the holding chamber.

The continuous heat treatment unit contains successive sections: a tape unwinding mechanism, a furnace and a strip winding mechanism from the unit.

The mechanism for unwinding the original strips includes two unwinder 1, two pairs of rollers 2, scissors 3 for cutting the front thick ends of the strip, a welding machine 4 and an inlet loop device 5.

Furnace 6 thermochemical processing installed in front of her

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the paratube is set coaxially with the drum and: has the possibility of longitudinal reciprocating movement.

3. Pop-up assembly 1, characterized in that it is provided with a device located in front of the furnace to obtain the roll-up of rolls, made in the form of a working stand with profiled rolls mounted above one another with drives and hydraulic cylinders for reciprocating movement of one of the rolls in the vertical plane.

Stand 7 includes successive chambers: heating 8, extracts 9 and cooling 10 of the strip. The working space of chamber 9 is filled with furnace gas, the composition of which depends on the type of thermochemical treatment that is carried out in this furnace.

In the heating chamber 8 are located

two pairs of conductive rollers 11 and. deflection roller 12.

In the exposure chamber 9, the mechanism 13 of bifilar rewind is located. The latter includes turning

a rotor 14, on which drive winding drums 15 and 16 are installed with opening segments 17. Rotation drives of the rotor 14 of the rotation of the MOTO4HbDf. reels 15,16 and the open segments 17 are conventionally not shown.

Deflecting rollers 18 are located at the entrance and exit from the chamber 9 of the shutter. The retention chamber is equipped with furnace gas recirculation blocks 19, which consist of nozzles 20 for taking the furnace gas from the chamber, fans 21 and guide vanes 22 for supplying - furnace gas to the treated strip.

In the guide vanes 22, concentric annular channels 24, 25, 26, and 27 coaxially coiled with windings are made (within the limits of the change in diameter of biphilic rolls 23).

rabanam 15 and 16.

3

The channels 24-27 are separated from each other by annular partitions 28. At the entrance to the channels 24-27 there is a flange 29 with partitions 28. In the latter, opposite each channel 24-27, there are holes 30 of diameter d located around the circumference of the channel. With the flange 29, an adjustable shutter 31 is in contact, made in the form of a rotary disk with arc grooves 32 located against the openings 30 of the flange 29. The grooves 32 have different arc length B, which is the distance between the centers of the fillets.

The grooves located opposite the outer channel 27 have an arc length of 0, i.e. are made in the form of holes. The grooves located opposite the channel 26 have an arc length P The grooves located opposite the channel 25 have an arc length P 2, etc. The grooves located opposite the channel 24 have the greatest arc length f - 3 F ,,

The specified arc lengths correspond to the central angles, O ,, ,, “:, Е, 2с), f 3oi. .

The width b of the grooves 32 is equal to the diameter d of the holes 30, i.e. b d. The valve 31 has the ability to rotate within the limits of the RZ angle ol. Using the drive 33 according to commands from the ICOHT system — the role of the current diameter of bifillary rolls 23 in the process of winding or unwinding (the control system is conventionally not shown).

Each guide vane 22 is mounted in the carrier body 34 so that it can move along the winding drums together with the flap. By means of a hydraulic cylinder 35, this 31. In this case, the actuator 33, which is permanently installed, has a movable spline coupling 36 with a flap 31.

The cooling chamber 10 is provided with devices for cooling the strip, for example, by feeding cold kiln gas to this strip.

The working stand 7 has profiled rolls 37 made in the form of discs mounted with the possibility of axial movement on the supporting drive rolls 38. On the upper discs along the outer perimeter pins 39 are installed with a certain pitch, and on the lower discs grooves 40 are located with the same pitch.

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The cage is equipped with hydraulic cylinders 41 for periodically profiling the treated strip by converting and diluting the upper roll 37 and the strip length measuring system with a measuring roller 42.

The winding mechanism includes a loopback device 43, scissors 44 for cutting the strip and two winders 45 with backing rollers 46 in front of them.

The loopback devices 5 and 43 are designed to ensure continuous operation of the furnace part of the unit during deceleration or stopping of the sections of the 1 ' s or the strip.

The band is transported in an aggregate by means of pulling S-shaped stations 47, installed in series in all parts of the aggregate.

The unit works as follows.

The rolls of the initial strip are alternately unwound from one of the two spreaders 1. At the same time, the front ends of the strip, which are set with rollers 2, are fed into the scissors 3, where cutting of the non-conforming and thickened sections of the STRIP is made. The connection of the end of the previous roll with the front end of the subsequent roll is made in the welding MaiiDiHe 4.

Continuous strip through the loopback device 5 enters the furnace part of the unit. In the kiln section, the strip successively passes through the working stand 7 and the furnace 6. At the same time, the discs of the profiled rolls 37 in the working adhesive 7 are set along the width of the processing T: the strips and in the collapsed position they apply small protrusions on its edges. heights (on the order of 1.0-1.5 mm).

In the process of moving the strip through the cage 7, the rollers 37 are periodically diluted with the help of hydraulic cylinders 41. As a result, the sections of the strip with profiling alternate with smooth sections of equal length. The length of each of these sections is equal to the length of the strip located between the winding drums 15 and 16 in the charge chamber 9.

In the furnace 6, the strip is first heated to the required temperature in the chamber 8. Heating is performed by an electrocontact method by passing a current through the strip with the help of conductive rollers 11.

When conducting a decarburization annealing, the heating temperature of the strip is 630-650 ° C.

Heated band enters the chamber 9 of the exposure. In this camera, a continuously moving strip lasts a predetermined time. In the process of aging, thermochemical treatment of the strip is carried out re-circulating. my furnace gas. When conducting a decarburizing annealing, the holding time is 2-3 hours. The composition of the furnace atmosphere is a protective gas containing moisture in the amount of 9-12 g / m. In the course of decoupling annealing of cold-rolled steel of type 081Ш, the carbon content in the strip decreases by a factor of 2-3. The mechanical properties of these bands after heat treatment correspond to the category of OSV (a particularly complex exhaust) according to GOST 9045-80.

The specified strip dwell time in chamber 9 is ensured by sequentially rewinding this strip into two-layer (bifilar) rolls on the winding drums 15 and 16

This rewind is performed as follows.

Let at the beginning of time on one of the winding drums 16 there is a two-layer roll 23. The second drum 15 with the opened segment 17 turns the rotor 14 counterclockwise and brings the plane of the connector with the segment to the strip from its entrance to the chamber 9. After that segment 17 closes and presses the strip against the connector flatness.

Then, a double layer roll is wound onto a winding drum 15 and a double layer roll is unwound from drum 16. At the same time, one branch of the strip enters the drum 15 from the entrance side of chamber 9 and the second from the double layer roll on drum 16. The second branch of the double layer roll enters at the exit of the chamber 9. The movement of the strip at the entrance and exit of the chamber 9 occurs in one direction.

After the end of the unwinding of the roll on the drum 16, both of the drums 15 and 16 are stopped.

a double-layer roll 23 is wound on the drum 15, having the same number of turns as in the roll that was previously on the drum 16. Segment 17 on the drum 16 opens and releases the strip from the outlet side of the chamber 9. Thereafter, the rotor 14 together with winding drums 15 and 16 50 rotates clockwise and leads the drum 16 to the strip from its entrance to the chamber 9. The drum 15 with the roll 23 moves to the unwinding position against the strip exit from the chamber 9. Then the segment 17 of the drum 16 is closed and winding takes place double layer roll on drum 16 and unwinding a previously wound roll from a drum 15, etc.

0 When winding double-layer rolls because of the presence of a profiling strip on the edges of one of the winding branches, between rolls of these rolls there is a small gap — i.e., gaps of about 0.4 5 0.8 mm. Thus, in chamber 9, the processed strip is sequentially rewound in the form of so-called unrolled rolls 23. In the process of rewinding

0 strip is produced by blowing in furnace gas. For this, the furnace gas is taken from the space of the chamber 9 by means of the 19-circulation units and through the direction Yusch-1e the apparatus 22 is fed to the end

5 winding or unwinding rolls 23. When these rolls are wound as they grow, their meter will sequentially open channels 24, 25, 26, and 27 in guide vanes 22.

At the beginning of the winding of the roll 23 onto the on-line drum 15 or 16, only the channel 24 is open. The remaining channels are closed. After the diameter of the roll roll becomes equal to the outer diameter of the channel 24, the flap 31 is rotated by an angle a. At the same time, the grooves 32 in the valve, located opposite the channel 25, are installed against the holes 30 in the flange 29. The furnace gas begins to flow into the channel 25. When the coil is wound with a diameter equal to the outer diameter of the ring 25, the next valve gate 31 is rotated , and opening channel 26, etc.

When unwinding a roll as its diameter decreases, 71

the cover channels 27, 26, 25 n 24 by successive rotation of the valve 31 at an angle c; 2ci .; For: and 4 oi in the opposite direction.

When switching to the new width of the strip to be processed, a mi-schmalnyi gap between the guide vane 22 and the end face of the coils 23 is provided by the corresponding movement of the apparatus 22 in the base body 34 by means of a hydraulic cylinder 35.

Before turning the rotor 14 with the winding drums 15 and 16, the guide vanes 22 are retracted from these drums to their original position. After the end of the rotation of the rotor 14, the guide vanes are again set to the working position.

This design of the guide vanes 22 ensures that the maximum amount of recirculated furnace gas is fed into the gap between the coils Ii.

The heat-treated strip is cooled in the chamber 10 and enters the area where the finished product is delivered. Here, the strip, if necessary, passes training and dressing in the correct dz ssirovochny camp (conventionally not

)about

cauldron) and coiled; across the reels of the winders 45 into rolls of a given weight. Cutting a strip while winding a roll of a given weight is done with knives 44.

The advantages of the unit of the proposed design are the possibility of carrying out thermo-scratching of rolled products in a continuous flow to significantly improve its mechanical properties, for example, the ductility of the bands using decarbonising annealing; reduction in comparison with annealing in bell-type furnaces, uneven heating, and cooling of rolled products, especially bands along their length and length, and, consequently, ensuring the stability of the properties of rolled products, since heating and cooling: a: it is carried out in expanded form ; high process performance; full mechanization of the heat treatment operation, eliminating manual labor; the possibility of carrying out all operations of processing the strip after cold rolling in a continuous continuous flow (chemical cleaning, heat treatment, training, dressing, etc.) with the issuance of ready-to-use products from the unit.

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FIG. 2

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FIG. 3

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Processing strip

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FIG. 7

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FIG. 9

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Claims (3)

1. UNIT OF CONTINUOUS PROCESSING OF BROADCAST PRODUCTS, comprising a process unwinding mechanism for the products, an oven with heating, holding and cooling chambers, a winding mechanism and a winding mechanism installed in the holding chamber and made in the form of drums, heating and with the fact that, in order to expand technological capabilities and improve the quality of product processing, the unit is equipped with furnace gas recirculation units installed in the holding chamber, made in the form of series connected s between an intake nozzle, and the fan guide vanes. 12 3 4 47 Il 13 1 \ I / / ⁸ —1 V ' 4742 7 V-, ·. · —..... ............................ / Original rental task area The stove part (Put. F g 777 //// M / 77 7 / Z ZZZZZZZZZZZ. </ Z g --------------------------------------------> Section of ice and thermowel · pre-rolled SU „„ 1234445 A1 2. The assembly according to claim 1, characterized in that the guide apparatus is made in the form of sequentially installed shutters with arc, radial grooves, the length of which is increased to the center of the shutter of the distribution plate with radial holes and annular concentric pipes connected to it, with grooves in the shutter, the holes in the plate and the annular channels of the nozzles are made coaxially, and the shutter has the ability to rotate around its longitudinal axis, and the AP1234445 parat itself is installed coaxially with the drum and has the ability to longitudinally a reciprocating movement. 3. The unit according to claim 1, characterized in that it is equipped with a device for receiving fluff rolls located in front of the furnace, made in the form of a working stand with profiled rolls installed in it one above the other with drives and hydraulic cylinders for reciprocating movement of one of rolls in a vertical plane. ·