SU1011322A1 - Method of producing heat exchangers, mill for performing same and apparatus for conveying elongated articles for working tube bending machine - Google Patents

Abstract

1. A method of manufacturing heat exchangers from pipes, including the operations of bundling and welding pipe lashes, finning them from two sides, removing ribs in places of bends, bending ribbed pipe lashes in a coil and welding ribs between each other, about m and h and with that, for the purpose of higher: neither productivity and quality, in the i-process, the bending of the coil branch of the coil around its longitudinal axis within elastic deformations is flexible. 2. A mill for carrying out the method according to claim 1, comprising successively arranged production lines for tube pipes with devices for measuring and bundling pipes of various lengths, an radio frequency line of pipe ribs with devices for processing ribs to size and separating the lines for dimensional workpieces and sorting, a coil production line with a rib removal mechanism at the points of the bends and a pipe bending machine; a coil welding unit located between the roller tables for transferring the pipes and the device for transmission; {long items for processing, (L distinguished by the fact that it is equipped with a hanging arm with a portal installed with the possibility of reciprocating movement parallel to the axis of the mechanism; removing edges made in the form of .. installed on the drive carriage. field columns carrying a rotary clamping head in the form of a gripper installed in the housing with two rotary jaws equipped with clamping segments, in which they have a surface that is capable of interacting with the workpiece and 1C; on the gear - with the gripping body, wherein the end faces of the segments formed with concentric grooves rasprlo-conjugated and provided with CONST, ruyuschimi elements arranged in these grooves.

Description

3. A device for transferring long products to processing, containing a drive with a fixed bar in which grooves for tube lashes are made, and a loader made in the form of a frame with drive sh shaft, carrying eccentrically mounted gears, and grooved bars, distinguished by what,

in order to increase the productivity and accuracy of the delivery of long products, the frame of the reloading device is equipped with spring-loaded sliders mounted for reciprocating relative to the storage slats, and the drive shafts are installed in these sliders and equipped with gears interacting with gears mounted on the shafts.

4. Pipe bending machine, containing installed on the axis in the frame

rotatably replaceable platform, two carriages with blocks of flexible rollers mounted on the ends of the platform, drive gears mounted on the axles of the carriages, synchronizing rail, interacting with.

these gears, two mechanisms for fixing and pushing out the knee of the coil, each of which is kinematically connected with a corresponding carriage, and a bending template, characterized in that, in order to increase productivity and expand technological capabilities, it is equipped with transporting mechanisms and crown elements, by means of which they are rigidly fixed on the interchangeable platform, with this each transporting mechanism is kinematically connected with the corresponding carriage.

5. The machine according to claim 4, distinguishing, with the fact that each transporting mechanism is made in the form of a Kopinyca rotary-mounted Kopinyca with a gear vend bearing a finger with a roller mounted movably on it, a pinion gear, kinematically associated with the bending unit rollers and interacting through the intermediate gear,. movably mounted on an axis in the bracket, with a toothed crown swivel housing.

The present invention relates to the treatment of pressure metals, in particular, to methods of the device for the manufacture of coil membrane heat exchangers used in boilers.  Nowadays, in the boiler-building industry, the new technology of manufacturing membrane heating surfaces from silver pipes, tonnes is being intensively mastered. e.  pipes, each of which is connected to two metal strips diametrically arranged, and for the manufacture of tubular products, in particular heat exchangers, long lengths (more than 70 m of tubular rods ribbed in certain areas (ribs should be absent in the places of the coil bends) are needed.  However, domestic pipe mills, due to the complexity of the technology, do not produce ribbed pipes.  The closest to the proposed technical essence and the achieved result is a method of manufacturing membrane heating surfaces, including the operations of welding the ribs to smooth billets, ensuring the sections free of the ribs for bends being formed, bending the pipe billet into a coil, assembling coils in a package. the process of bending the ribbed whip into the coil during the formation of each knee it is impossible to ensure parallelism of the coil: the coil and to reach the edges of the ribs to each other providing quality welding edges to each other without additional finishing operations.  This is due to the fact that during the shaping of the bend, the bend-down branch is rotated through an angle of 180 °, while the ribs abut against each other, which leads to the following.  When stopping the deformation forces at the moment of contact of the ribs and relieving the clamping stresses in the bending knot, the coil branches are sprung due to residual deformations (for bending at an angle of 180 °).  a bend of 1.5-2 ° is required), which forces us to resort to finishing operations during assembly before welding.  When the bend is made at the angle of spring, at the moment when the ribs abut against each other, the external shape of the bend is distorted and, as a result, the distortion of the pipe cross-section increases ovalization.  There is also known a mill for implementing the method, comprising successively arranged lines for manufacturing tubular whips with devices for measuring and bundling pipes of various lengths, radiofrequency finning for tubular whips with edge processing devices for separating the strands into dimensional pieces and sorting, producing lines for coils with: a mechanism removal of edges in places of bends and pipe bending machine, Noah, coil welding unit, located between the lines of the roller table for moving pipes and the device for transmission of numbered products for processing fl.  The disadvantage of this mill is: the impossibility of manipulating the workpiece and the process of bending. It is also known a device for the transfer of long products to processing containing the drive in the form.  Moving many fair-haired horizontal.  consoles and pipe reloader, made in the form of a frame with eccentric shafts, on which racks with toothed strips are installed, and the accumulator cantilevers are made in the form of toothed planks identical to the toothed rails of the overloading of bodies G.   The disadvantages of this device are limited technological.  opportunities and low operational reliability due to the impossibility of overloading the processing of finned tube lashes in a strictly oriented position; limited pipe accumulation; the complexity of synchronizing the movement of the konekopiteli (multi brown horizontal consoles) to the position of overload and moving the tube stackers by one step.  Toothed rails it is very difficult to synchronize the simultaneous operation of a number of actuators in this case — cylinders, to which, moreover, a supply of a working fluid of fluid or air is necessary.  Also known is a tube bending machine, comprising a frame mounted on it with a rotatable platform rotatable on an axis, two carriages with a block of bending rollers mounted on the ends of the platform, rotatable around its axis, driving gears mounted on the axes of the carriages, synchronizing a rail capable of interacting with both drive gears of the carriages, two mechanisms for fixing and pushing out the coil shaft, each of which is kinematically connected with the corresponding carriage C 31.  However, in connection with the development of new types of membrane heat exchangers in production and a constant increase in their range for different types of boiler units, an increase in their dimensions both in width (the number of coils knees due to an increase in heat exchange surfaces and capacity of boiler units) and in the length of the intercenter distances of the adjacent bends, the technological capabilities and the productivity of the mill decreased slightly.  It became necessary to eliminate these drawbacks by automating time-consuming auxiliary operations associated with gabki operations.  The purpose of the invention is to increase productivity, quality, accuracy and expansion of technological capabilities.  The goal is achieved by agreeing to. a method of manufacturing heat exchangers from pipes, which includes the steps of bundling and welding pipe lashes, finning them from two sides, and removing the fins at the places of dyes.  Bov, bending the ribbed tube lashes into the coil and welding the ribs together, in the process of bending, rotate the bent branch of the coil around its longitudinal axis within the elastic deformations.  A mill for carrying out the method, comprising successively arranged lines for manufacturing pipe lashes with devices for measuring and picking pipes of various lengths, a line of radio frequency finning of pipes. Lash with edge processing devices in the size and division of the lash into dimensional workpieces and sorting, line. making coils with a rib removal mechanism in places of bends and a pipe bending machine; the coil welding unit, located between the conveyor lines for moving pipes and the device for transferring long items for processing, is equipped with a suspension arm with a portal that can be reciprocated parallel to the axis of the rib removal mechanism, made in the form of a hollow column mounted on a drive carriage that carries a rotatable clamping head in the form of a gripper installed in the housing two pivoting jaws provided with clamping segments, the inner surface of which is capable of reacting with the workpiece, and output: on the gear housing with the grip, wherein the end caps, segmentbv surface formed with concentrically arranged grooves and provided with locking elements arranged in these grooves.  In the device for transferring long products to processing, containing a drive with a fixed bar in which grooves for tube lashes are made, and a loader made in the form of a frame with drive shafts carrying eccentrically mounted gears, and with slots with grooves, the frame of the loader is equipped with spring-loaded sliders, mounted with the possibility of reciprocating movement relative to the slats of the accumulator, and the drive shafts of the mouth. They are mounted in these sliders and equipped with gears that interact with gears mounted on shafts.  A pipe bending machine containing two carriages with bending roller blocks mounted on an axis in a frame with a possibility of rotation, drive gears mounted on the ends of the carriages mounted on the ends of the platform, timing gears and two mechanisms for fixing and pushing the knee of the coil into contact with these gears , each of which is nematically connected to the corresponding carriage, and a bending template, is equipped with transporting mechanisms and brackets, by means of which they are rigidly fixed to the replaceable oh platform, with each transporting mechanism kinematically associated with the corresponding carriage.  In a pipe bending machine, each transporting mechanism is designed as a rotary body mounted coaxially with a bending pattern with a gear ring, a finger with a roller mounted on it, a pinion gear, kinematically connected to the bending roller unit and cooperating through an intermediate sheterni movingly mounted on the axis in the bracket, with a toothed crown swivel housing.  FIG.  1 and 2 shows the knee.  membrane coil at the time of application of bending forces; in fig. S knee when sprung; . . in fig.  4 and 5 - the same, with the bend with simultaneous rotation of the branch along its axis; in fig.  b - the final position of the stake on; in fig.  7 and 8 - ready membrane coils before assembly into the package; in fig.  9 - coil membrane heat exchanger, general view; in fig. 10 set of equipment for the manufacture of membrane heat exchangers, general view; FIG. 11 shows a device for transferring long products to processing; in fig.  12 is a section A-A in FIG.  11; FIG. 13 shows a section BB in FIG. 12; FIG. 14, 15 and 16 are the positions of the transmission mechanisms; in fig.  17 view B in FIG. 10, portal c. suspended manipulator; in fig.  18 — the node in FIG.  17 (rotary clamping manipulator head); in fig.  19 is a view of FIG.  17; in fig.  20 is a section d-d in FIG.  19; FIG.  21 is a sectional view in FIG.  19 (clamping jaws in closed position); in fig.  22 - clamping jaws in the open position; in fig.  23 is a section of an LF in FIG.  18; in fig.  24 shows section 3-3 in FIG. 18; in fig.  25 - pipe bending machine, general view; in fig.  26 - Tube bending machine in plan ;, in FIG.  27- / view of FIG.  25; in fig.  28 is a view of K in FIG.  25; FIG.  29 - incision MM 26; in fig.  30 is a view L in FIG. 25, The mill for the manufacture of membrane heating surfaces includes the following production lines and sections of technological equipment: a line for the manufacture of tube lashes from dimensional smooth tubes 1, a line of radio-frequency finning of smooth tube lashes 2, a line for the manufacture of coils from finned lashes with cut sections 3, a segment manufacturing gas-tight panels 4; and economizer manufacturing section 5.  The coil production line consists of two sections: the removal of the ribs in the places of future bends 6 and the section of the flexible coils 7.  The pipe lash manufacturing line consists of a hopper of source pipes 8 with a piece dispensing device for pipes 9, a programmable measuring unit 10 with a cutting machine 11 for processing pipes according to the dimensions specified by the measuring unit (not shown), the roller table 12 for feeding unused pipe cutter into the bunker 13 for their storage and gradual use, roller tables 14, 15, 16 and 17, mechanized racks 18 for sorting and.  transferring machined pipes for butt welding operations, machine tools 19 for trimming and stripping pipe ends, accumulators 20 and 21, roller tables 22 for feeding pipes to butt-welding machines 23 and 24, roller tables 25 and 26 for receiving long pipe lashes, accumulators 27 and 28 for storage prepared for ribbing.  The line of radiofrequency finning of tube lashes consists of a lath 29 for feeding lashes into a welding unit 30, cassettes 31 with coils of strip 32, a device 33 for removing burrs and processing ribs, in size, devices 34 for dividing continuously finned lashes into pieces of the required length, a roller table 35, accumulators 36 and 37 with a device 38 for sorting finned tube lashes and transferring them to the production areas of coils, gas-tight panels and fencing screens.  The rib removal area at the gib sites consists of a receiving roller table 39, a main feed mechanism 40 with a programming device for moving the orfbre scourge to the cutting edge position (not shown) of the punching machine 41, an auxiliary feed device. 42, the output roller table 43, loaders 44, al transfer lashes with cutting plots of finning on the drive 45.  The coil fabrication area consists of a rack, 46 with tilter 47, a portal 48 with a manipulator 4 for grabbing a whip from the accumulator 45 and.  into the pipe bending machine 50, (Portal 51 with a load gripping device for removing the vetch formed by the snake from the turntable of the bending machine and building (shown). The membrane economizer package production site consists of an installation 52 for pre-assembling packages and an installation 53 for welding the beads () between each other by electrical rivets.   The site for the manufacture of gas-tight panels and fencing screens consists of an assembly stand 54 and a multi-arc welding installation 55.  The accumulator 45 comprises a frame 56, on which with fixed pitch fixed bars 57 with grooves for ribbed tube lashes.  The number of grooves and the pitch between them are determined by the performance of the pipe bending mawotna 50 from the condition of a full supply of pipe lashes for its one-dimensional operation (for example, in the case of an unforeseen stop of the cutting edge line).  Inside the frame 56, directly at the location of the slats 57, the sections of the transmitting mechanisms 58 are installed, a loading device 44, each of which consists of a driving station 59 transmitting rotation to two pairs of 60 (rotation of all shafts is carried out from one side to another).  The shafts are made, composite and interconnected couplings 61.  In the zone of each section, eccentric on each of the shafts 60 through a strictly defined pitch) drive gears 62, which engage with gears 6 3, pivotally fixed in sliders 64, mounted with the possibility of reciprocating movement tsikh grooves 65 motionless levels 57 and spring-loaded springs 66.  ;: On each pair of gears 63 ya fingers 67, eccentrically secured in them, pivotally mounted movable slats 68 with grooves, the spacing between which corresponds to the pitch between the shoulders on the fixed slats 57.  The manipulator 49, movably mounted on the portal 48, consists of a drive carriage 69, on which a column 70 is mounted with the possibility of vertical movement, carrying a rotating-clamping head 7 at its lower end. one.  The rotary clamping head comprises a housing 72, in which a shaft 75 is mounted in bearings 73 and 74, the left end of which is made by a spit-tooth.  On the side of the left end of the shaft on the housing 72, electromagnetic clutch 76 is reinforced.  In addition, on the same.  1the shaft is installed second electromagnetic clutch 77, movable | the disks of which interact with the eyeliner 78 of the worm gear 79, rigidly fixed on the hub of the PO, loosely seated on the smooth part of the shaft.  On the sleeve 80 on the right side of the shaft 75 is rigidly fixed gear 81.  In addition, on the same side. the shaft is rigidly mounted on the upper clamping jaw 82, supported by the holder 83 and the bearing 84 also on the sleeve 80, the upper jaw 82 is made in one piece with the toothed sectors 85 coaxial with the shaft 75. The toothed sectors 85 interact with the toothed sectors 86, integrally formed with the lower ones.  a clamping sponge 87 rotatably mounted on bearings 88 supported on an axis 89 fixedly mounted in housing 72.  .  In the upper and lower sponges. the gear segments 90 and 91 are movably mounted, forming a gear at cNE KaHHH sponges and interacting by means of an intermediate gear 92 with gear 8X.  Concentric grooves are made in the end surfaces of the toothed segments, in which clamps 93 are rigidly mounted, rigidly mounted on the jaws and protecting the jagged segments from falling out when the jaws open.  Each toothed segment is provided with a clamping element 94.  When the jaws are closed, the clamping elements fix the workpiece.   The rotational-clamping head is driven from an electric motor 95, transmitting a rotary motion to the shaft 75 by means of gears 96 and 97 and a screw 98. .  The pipe bending machine 50 comprises a bed 99 with a shaft 100 rigidly fixed therein with a central gear 101 in contact with the synchronizing rail 102.  H5 to the shaft 100 movably, a pivoting platform 103 is mounted, supported by means of rollers 104 on the upper part c. tannins.  In the longitudinal guide 105 platforms with the possibility of installation.  The carriages 106 and 107 with bending heads are mounted for this movement. Each of which includes a base 108 with a central axis 109 rigidly fixed in it, the central axis 109, which is coaxially with drive gear 111, and gear 1 111 of both bending heads mounted on sleeve 110. interacts with synchronization rake 102; which is movably mounted in guides: 112 platforms.  .  On the upper part of the axis 109, the lower semi-template 113 is fixed, coaxially with the bracket 114 with the possibility of vertical movement, the upper semi-template 115 is mounted, and when the semi-templates are closed, a working stream of the bending template is formed.  On both brackets 114 mounted transporting mechanisms 116.  each of which contains a housing 117 mounted coaxially with the upper half-arm with a lap 115 with the possibility of rotation on bearings 118 and 119.  A gear ring 120 is rigidly fixed inside the housing and is in contact with the intermediate gear 121, which is movably mounted on an axis 122, which is rigidly fixed on the protrusion 123 of the bracket 114.  Intermediate gear 121 is also in contact with the pinion 124, which is rotatable mounted on the pine bracket 114 with the upper half-frame 115.  An axis 126 is rigidly fixed on the yoke 125 of the housing 117, on which the diverting roller 128 is movably mounted on the sub-stand 127.  Leading gear 124 receives rotational motion from the drive gear 111 through the rack 129 and the lever 130 when turning the corresponding carriage.  The manufacture of membrane heat exchangers using the proposed methods and equipment complex placed in a line is carried out as follows.  Pipe lash is completed from dimensional pipe blanks in such a way that the places of welded joints do not fall into the zone of future formed bends.  For this, a package of pipes is fed by an overhead crane to the pipe lasts manufacturing section 1 and placed in a bunker 8, from where each pipe is pushed onto a roller table and then fed to a measuring unit 10, which measures the pipes and cuts them according to a computer program so that the length of the pipes of the sheet of their subsequent docking did not fall into the whip; would be in the zone of the bends of the coils in the zone of the ban}.  After that, the pipes are fed to the cutting machines 11, where they are machined in size, and the unused sections of the pipes enter the bunker 13 through the roller table 12.  Tubes intended for the assembly of lashes along the conveyors 14, 15, 16, 17 arrive at the mechanized rack 18, where they are sorted and transferred to the machines 19 for trimming and stripping the ends of the pipes for welding.  The machined pipes enter the accumulators 20 and 21, from where along the conveyors 22, I get to the butt-welding machines 23 and 24 and are welded into a whip.  The formed lashes enter the receiving rolls 25 and 26 and are transferred to the accumulators 27 and 28 for storage before the fins.  The finning of a smooth tubular whip is carried out along its entire length.  radiofrequency welding using a bar strip, for which, from accumulators 27 and 28, lashes are individually picked up on a roller table 29 and fed to the radiofrequency line 2 of the radiofrequency to the welding unit 30.  In the course of supplying the whip to the welding machine, strips 32 are guided to it from cassettes 31, which are welded to the body of the pipe by currents of the radio frequency from both sides.  The welding is carried out according to the program in such a way that at the places of subsequent bends, if the ribbed lash is intended for manufacture of serpentine coils of membrane economizers, undoped sections of the fins are passed by switching off the welding current.  At the exit of the welding unit, the finned lash enters the device 33, which removes the burr generated by. welding, and calibrates the edges along the edges in size.  Upon further movement, the lash enters the device 34, where it is divided into separate blanks of the required length, which are then fed. using a roller table 25 & The accumulators 36 and 37 and the device 38 are sorted by frame sizes and transferred for further processing into 3 rib removal points in the beeways or section 6 for the manufacture of gas-tight panels and enclosing screens.  When feeding the ribbed lashes to section 3, they are individually issued to the receiving roller 39.  Scourge on the roller conveyor enters the main feeder mechanism 40.  On a command from the minicomputer, the feeder 40 moves the ribbed whip to the cutting press 41 so that the unheated portion of the fins (first position) is placed in the stamp area and, at the command of the computer, to activate the press, the fins of the fin section | When the lash is moved to the second, position V, the cutting of the finning zone at the place of formation of the bend of the coil is done in two operations J, the second section is cut, and the finning is dumped: into the container, the subsequent cutting operations are carried out in a similar way.  ) 1 liter of filing for ribbing, the end part of the whip is used with an auxiliary feeding device 42, which starts to act as soon as the end of the whip leaves the feeding mechanism 40.  In the process of cutting operations, the lash enters the output roller 43 and, at the end of cutting, takes the initial position before transferring to section 4 of manufacture

Meevikov flexible ribbed plexuses with chopped areas.

When the drive station 59 of the first group of sections of the transmitting mechanism 58 is turned on (the shafts closest to the roller table 43j.60 begin to turn 5 (clockwise according to FIG. B) together with the eccentrically mounted gears 62 which are in contact with gears 63, the sliders 10 64 are forced to move (due to the eccentric arrangement of the gears 62), overcoming the force of the springs 66. At the same time, each pair of gears 63, turning relative to the corresponding-} 5 sliding sliders 64, causes the moving strips 68 to move, pivotally mounted on eccentrically fixed fingers 67. The slats 68, moving elliptically the trajectories of n (Fig. 8, the first extreme grooves capture the whip with the cut-out sections / and the roller of the roll table 43 of Fig. 6 and 8), carry and fold it into the first extreme grooves fixed jc slats.57 accumulator 45.

When the operation is repeated, the first lash is placed in the second grooves of the fixed strips 57, and the second (and subsequent) in the first grooves, etc. before filling all the fixed slats of the accumulator with the appropriate switching on of the driving stations 59.

Such a design of the device for the transfer of long products for processing provides for the accumulation of fingers 35 days both in all the grooves of the fixed planks and in part of the grooves as the lashes are processed or received from the previous operation.

The movable strips of the latter with the section 40 of the transmitting mechanisms 58 (close to the rack 46) take the strap from the extreme slots of the fixed slats by extreme slots and transfer it to the shelf 46, so that the end 45 of the whip falls into the turners 47.

With the simultaneous activation of the drives of the portal 48 and the carriage 69 carrying the manipulator 49, the portal moves to the right (Fig. 4, 9 and 13 to the bed 46, and the carriage moves along the portal to the whip prepared for processing, while the jaws 82 and 87 of the pivoting-clamping head 71 are opened. According to a predetermined program, the manipulator is guided to the whip to grip its front end.

When the electric motor 95 is turned on, the rotation through the gear pair 96 and 97, the worm 98 is transmitted to the worm gear 79. Simultaneously with the 60 turn on. The electric motor activates the electromagnetic clutch 77, which transmits the rotation through the worm gear to the shaft 75. When the shaft 75 rotates, lip-. ki 82 and 87 also rotate 65

using clamping elements 94 grab the end of the lash. In this case, the gear 80, does not rotate, since the sleeve 80, which is rigidly connected to the worm gear 79, turns out to be rigidly connected by means of the electromagnetic coupling 77 to the bottom 75 and has the same angular velocity.

At the end of the strap clamping, the electric motor 95 and the electromagnetic clutch 77 are turned off and the brake electromagnetic clutch 76 is turned on, locking the shaft 75 relative to the housing 72, thereby preventing the spontaneous opening of the clamping jaws.

With simultaneous activation of the drives of the portal 48 and the carriage 69, the manipulator 49 is moved together with the lash according to a predetermined program to the position of feeding the whip to the bending heads of the pipe bending machine 50. In the initial position of the bending machine, the end of the whip is introduced by the manipulator into the working area of the bending head 107 to the required the size for making the first bend and when closing the half-patterns 113 and 115, the lash is rigidly fixed before the bending. A command is given to unclamp the jaws 82 and I 87 of the swivel-clamping head, retract the reel 69 with the manipulator to the side to pull out the jaws and lift the column 70 with the swivel-clamping head upward to allow the free movement of the stick during the bending process.

By turning Sh1atfori 103 counterclockwise (Fig. 17), the first bend of the coil leg is formed at a smaller angle on the pipe runner by the bending head 107, while the carriage with the bending head 106, idling, occupies an intermediate position.

. To obtain a second bend on the bending head 107 opposite to the first bend, the pipe pipe must be rotated 180 about its longitudinal axis. For this, the manipulator is again brought to the whip (in the described sequence / jaws 82 and 87, clamps it and leads it out of the working area of the bending head 107. By turning the platform 103 in the opposite direction (from the intermediate position), the bending head 107 returns to its original position. After that rotate ribbed whip.

In order to facilitate the rotation of the scourge and to prevent the ribs from deforming, simultaneously with the start of operation of the rotary-clamping head of the manipulator, turners 47 begin to act.

When the motor 95 is turned on, the rotation is communicated to the worm wheel 79, while the electromagnetic coupling 77 is turned off, and the electromagnetic coupling 76

It is turned on and provides a rigid fixation (braking) of the shaft 75 relative to (but the housing 72. At this moment, only the sleeves 80 rotate, and together with it the gear 81, which via the intermediate gear 92 communicates the rotation of the gear segments 90 and 91, and therefore, fixed in the clamping elements 94 of a finned lash. In this position, the lash is set by the manipulator into the working area of the bending head 107 and when the half-patterns 113 and 115 are closed, the gesture o is fixed. After this, the magnetic coupling 76 turns off the electromagnetic clutch 77 communicates rotation shaft 75 and is carried zazhimtsyh opening jaws 82 and 87, then the manipulator is withdrawn to one side and lifted up.

By turning the platform 103 counterclockwise, the second bend is formed (the knee of the coil with the angle of this carriage with a bending head 106, making a idling, takes the initial position to form a third bend. During the anticlockwise rotation of the platform, the conveying mechanism 116 of the carriage with a bending head 107 idle and the roller 128 is automatically reset to output the coil formed knee.

At the time of the formation of the second (and subsequent) bend, the free part of the whip is automatically installed in the working area of the bending head 106 (this head occupies the previous position of the bending head 107 and during the bending process the position of the heads alternates) and when the half-templates 113 and 115 are closed, they are fixed firmly before the next bend is formed. . At the same time, the formed knee is unlocked on the bending head 107 by opening the half-patterns and pushing it from the lower semi-template 113 into the zone of action of the conveying mechanism 116 of this bending head.

By turning the platform 103 clockwise, the third bend is formed on the bending head.

106, while its transporting mechanism is idling, and the transporting mechanism of the bending Zolovka 107 makes a working stroke and the roller 128 automatically removes the second coil knee formed from its working area. At this time, the carriage with the bending head 107 is idling and takes up its initial position to form the fourth bend.

In the process of performing bending operations, each transporting mechanism operates as follows.

Leading gear 124 through the rack 129 and the lever 130 receives rotation from the drive gear 111 of the respective carriage (the gear rotates to the right or left depending on the direction of rotation of the platform) and via the intermediate gear 121 transmits the rotation of the gear rim 120, and therefore, the body 111 with a withdrawal roller 128 moving the coil formed knee from the bending zone.

In addition to the transportation, installation and rotation of the ribbed lash, the manipulator turns the bending branch of the coil when forming a small radius bar in order to implement the proposed method of bending, i.e. ensuring the required quality of the bend by passing one rib over the other when bending the knee. on the angle of spring (figure 1).

This makes it possible to obtain a coil of exact geometric shape and to eliminate laborious finishing operations.

The finished membrane coils (Fig. 2) on the assembly stand are assembled into a bag and welded along the fins, in particular, by means of electrical rivets, forming a serpentine membrane heat exchanger (Fig. 3).

The use of the proposed inventions, united by a single general inventive concept, improves the quality of products, and, consequently, increases its reliability, increases labor productivity and expands the technological capabilities of equipment.

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and FIG. 27 f / J ff

Claims (5)

METHOD FOR PRODUCING HEAT EXCHANGERS AND A STAN FOR ITS IMPLEMENTATION. DEVICE FOR TRANSFER OF LONG-DIMENSIONAL PRODUCTS FOR PROCESSING. BENDING MACHINE. (57) 1. A method of manufacturing heat exchangers from pipes, including the operations of assembling and welding pipe lashes, finning them from two sides, removing (ribs ⁷ in the places of bends, bending ribbed pipe lashes into a coil and welding ribs together, In order to increase productivity and quality, in (the process of bending is carried out, they turn (of the bendable branch of the coil around its longitudinal axis within elastic deformations). 2. The mill for implementing the method according to π. 1, comprising consecutively arranged production line of pipe lashes with devices for measuring and assembling pipes of various lengths, a line of radio-frequency finning of pipe lashes with devices for processing ribs in size and dividing the lashes into measuring blanks and grades, a production line of coils with a mechanism for removing ribs in the places of bends and a pipe bending machine, a welding unit for coils located between the roller conveyor lines for moving pipes and a device for transferring long products for processing, £ with the fact that it is equipped with an overhead manipulator with a portal installed with the possibility = = a net of reciprocating movement parallel to the axis of the mechanism; S removal of the ribs, made in the form of .. installed on the drive carriage \. A hollow column bearing a rotary clamping head in the form of a gripper installed in the housing with two rotary jaws provided with clamping '\. segments, the inner surface of which is made with the possibility. _t interactions with the workpiece, and the outer gear one with the gripping case, while the end surfaces of the segments are made with concentrically located ¹ grooves and are equipped with fixing elements placed in these grooves. 3. A device for transferring lengthy products for processing, comprising a drive with a fixed ^J strap, in which grooves for pipe lashes are made, and a reloader made in the form of a frame with drive shafts bearing eccentrically mounted gears, and slats with grooves, different Furthermore, in order to increase the productivity and accuracy of feeding long products, the frame of the reloader is equipped with spring-loaded sliders mounted with the possibility of reciprocating movement relative to the slats of the drive, and the drive shafts are installed in these sliders and are equipped with gears interacting with the gears mounted on the shafts. 4. 'A bending machine containing an interchangeable platform mounted on an axis in the bed with the possibility of rotation, two carriages with blocks of bending rollers mounted on the ends of the platform, drive gears mounted on the axes of the carriages, a synchronizing rail interacting with. 'with these gears, two mechanisms for fixing and pushing the knee of the coil, each of which is kinematically connected with the corresponding carriage, and a bending template, characterized in that, in order to increase productivity and expand technological capabilities, it is equipped with transporting mechanisms and brackets, by means of which they are rigidly fixed on a removable platform, and each transporting mechanism is kinematically connected with the corresponding carriage. 5. The machine according to claim 4, characterized in that each conveying mechanism is made in the form of a rotary body with a gear ring mounted coaxially with the bending template, bearing a finger with a roller movably mounted on it, a pinion gear kinematically connected to the bending roller block and interacting by intermediate gear. movably mounted on an axis in the bracket, with a ring gear of the rotary housing.