RU2359773C1 - Unit for metallic strip corrugating - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: invention relates to metal deformation process, can be used for receiving of corrugated band for heat exchangers. Unit for corrugating of metallic strip contains stand, located on it die for clamp and strip corrugating, die from the outlet side of unit allows ability of vertical and horizontal displacement, located between dies forming punch, installed with the ability of horizontal and vertical displacement. Additionally other die is installed with ability of vertical displacement. Forming punch allows body and is implemented with providing of ability of its constant symmetric location relative to mentioned dies ensured by imparting to it horizontal displacement at a rate two times less displacement rate of the first die by means of kinematical connection with die from one side of unit. Additionally mentioned kinematical connection is implemented in the form of fixed on case of forming punch, connected by engagement with spline, fixed on stand and spline, connected to die from the outlet side of unit, and internal side surfaces of dies are implemented with fixed on it patches, total thickness of which is equal to thickness of forming punch. For vertical displacement of forming punch and dies, and horizontal displacement of the left punch there are used hydraulic drives.

EFFECT: manufacturing capability extension.

3 cl, 2 dwg

Description

The present invention relates to the processing of metals by pressure, can be used to obtain corrugated tape for heat exchangers.

A device for corrugating a tape is known (see, for example, No. 551082, B21D 13/00, 1975), taken as an analogue, including a central punch with lateral punches placed to the left and right of it, as well as a base plate .

The disadvantage of this device is the low accuracy of the corrugations in height due to the fact that they are formed with a clamp on only one side of the corrugated tape.

A device for corrugating a tape is known (see, for example, No. 1428491, B21D 13/00, 1985), which is closest to the claimed invention, taken as a prototype containing a bed, a drive and a working tool including side punches, a central punch, left a clamp and a calibration unit, consisting of a calibration punch, a calibration insert and a right clip, while the profile is formed when the central punch is lowered and the side punches come closer, and the profile is edited in the calibration unit.

The disadvantage of this device is the low technological capabilities:

- the transition to the molding of corrugations with a different height and pitch requires the replacement and / or reconfiguration of the working tool;

- the control elements of the device are cams and pushers, which makes readjustment difficult;

- corrugations are formed by lowering the central punch, as a result of which, when corrugations are formed at high heights, it is necessary to provide for an increased vertical stroke of the base plate, which significantly complicates the design.

The technical result of the invention is the expansion of technological capabilities:

- the manufacture of corrugations with a large ratio of height to thickness;

- increase the product range in height, width and pitch of the corrugations;

- reduction of the transition time to another standard size of corrugations;

- increase the accuracy of the corrugations in step and height;

- reducing the number of subsequent technological operations.

The specified technical result is achieved due to the fact that:

- the vertical drive of the forming punch and dies, as well as the horizontal drive of the input punch, are made hydraulic, while the horizontal movement of the forming punch is carried out due to kinematic connection with the input punch made in the form of engagement of the rack - pinion - rack located on the machine frame, the input stamp and the case of the forming punch, while the inner side surfaces of the dies are made with plates attached to them, the total thickness of which is equal to the thickness of the forming punch d I ensure a snug fit the edges of the corrugations;

- on the output side of the installation there are guillotine shears, the lower caliper frame of which with a chevron knife fixed to it is suspended on the levers of the installation bed, and the upper caliper is mounted with the possibility of moving along the guides of the lower caliper frame with hydraulic cylinders, the case of which is pivotally fixed to the frame, and the rods are fastened with upper caliper housing;

- on the input side there is a wiring unit consisting of a lower carrier plate located on the bed of the installation, centering rulers for centering the tape along the axis of the installation and a clamping device placed with the possibility of vertical movement due to hydraulic cylinders with a synchronizing shaft.

The invention is shown in figure 1, and figure 2 shows the sequence of operations when corrugating the tape.

All units of the installation are mounted on the bed 1. On top of the bed on the input side there is a carriage 2 with two built-in main molding cylinders 3. On the carriage 2 there is an input stamp 4, the lower horizontal plane of which serves to clamp the tape during molding, and the vertical plane - directly for corrugation molding. The clamping force of the tape is created by six plunger hydraulic cylinders, combined in a hydraulic panel 5 and acting on the input stamp 4. The hydraulic panel 5 is also equipped with two additional plunger hydraulic cylinders, which serve to raise the input stamp 4. The carriage 2 has the ability to move due to the hydraulic cylinders 3 along the guides of the frame 1 within double height corrugation.

On the output side of the bed 1 there is a tailstock 6, equipped with an output stamp 7 and a hydraulic panel 8, but the output stamp 7, unlike the input stamp 4 of the carriage 2, is installed without the possibility of horizontal movement and has an increased vertical movement, allowing passage of the formed corrugations.

In the lower part of the carriage body 2 there are guides for moving the carriage 9, on the front side of which the forming punch 10 is fixed. In the carriage of the carriage 9 on the rolling bearings there is an axle of pinion gears 12 engaged on one side with a rack 13 mounted on the carriage body 2, and on the other hand, with a rail 14 mounted on the bed 1. This kinematic connection provides a constant symmetrical position of the forming punch 10 relative to the input stamp 4 of the carriage 2 and the output stamp 7 of the tailstock 6 due to the horizontal I component of the speed of movement of the forming punch 10 is half the speed of the carriage 2. The vertical movement of the forming punch 10 is made by the hydraulic cylinders 11. The forming punch 10 forms a radius at the top of the corrugation, as well as the lumen of the internal cavity of the corrugation. The lateral surfaces of the input stamp 4 and the output stamp 7 are made with overlays fixed to them, the total thickness of which is equal to the thickness of the forming punch 10 to ensure a tight fit of the corrugation edges.

On the input side of the installation on the transverse beam of the bed 1, a wire assembly 15 can be located, consisting of a lower supporting plate, centering rulers and a clamping device, ensuring flatness of the formed tape, centering the tape relative to the axis of the installation and eliminating deformation of its edges.

On the output side of the installation, guillotine shears 16 can be located, the lower caliper frame 17 of which with a chevron knife fixed to it is suspended on the levers of the installation bed 1, and the upper caliper 18 is mounted to move along the guides of the lower caliper frame 17 using hydraulic cylinders, the body of which pivotally mounted with the frame 17, and the rods are fastened to the upper caliper body 18.

Installation works as follows.

Before starting work, the carriage 2 with the input stamp 4 is retracted from the output stamp 7 to the double height of the corrugation. The tape is clamped by the input stamp 4 and the output stamp 7. The forming punch 10 touches the lower plane of the tape, the clamping device of the wire assembly 15 is raised for free passage of the tape. After turning on the drive, the carriage 2 with the input stamp 4, according to a certain law of motion, begins to approach the output stamp 7 of the tailstock 6 and at the same time, the forming punch 10 starts moving upward by the value of the height of the corrugation. At the end of the stroke of the carriage 2, radii are formed at the top and bottom of the corrugation, the internal cavity of the corrugation, determined by the thickness of the forming punch 10, and also due to overlays on the input stamp 4 and output stamp 7, the corrugation edges are deformed to fit snugly against each other. At the end of the molding operation, the clamping device of the wire assembly 15 is lowered, fixing the tape, the carriage 2 makes a small backward movement to release the forming punch 10, after which the forming punch 10 is lowered to its lowest position. The input stamp 4 of the carriage 2 rises, freeing the tape, the carriage 2 is taken back a step between the corrugations, the input stamp 4 is lowered, clamping the tape, after which the output stamp 7 of the tailstock 6 rises to the distance necessary to let the corrugation form under it. After lifting the clamping device of the wire unit 15, the carriage 2 moves forward one step between the corrugations, while the corrugation formed in the previous operation passes under the output headstock 7 of the tailstock 6. Next, the output stamp 7 of the tailstock 6 is lowered, fixing the tape, the carriage input stamp 4 2 rises and moves back to the double height of the corrugation. The above operations are repeated until the corrugated tape reaches the desired length, after which it is cut on the guillotine shears 16 located on the output side of the installation.

Figure 2 shows the sequence of operations when corrugating the tape:

a) installation before starting work: the tape is clamped by dies, the distance between them is equal to the double height of the corrugation, the clamping device of the wire assembly is raised, the forming punch touches the lower plane of the tape;

b) the intermediate position of the tools during the molding operation; the input stamp with the clamped tape approaches the output stamp, the forming punch moves up;

c) the end of the molding operation; the input stamp is pressed to the output, forming a corrugation, the clamping device of the wire assembly is lowered, fixing the tape;

d) the same as point c), but the tape, stamps and forming punch are shown in horizontal section; the edges of the tape are tightly pressed against each other;

e) the carriage makes a small move back, releasing the forming punch;

e) the forming punch is lowered to its lowest position;

g) the input stamp of the carriage rises, freeing the tape, and the carriage moves back by the size of the step between the corrugations;

h) the input stamp of the carriage is lowered, the clamping device of the wire assembly rises;

i) the output stamp rises to pass the corrugated tape;

j) the carriage moves forward, passing the corrugated tape under the output stamp;

l) the output stamp of the tailstock is lowered, the clamping device of the wire assembly is lowered;

m) the upper caliper of the guillotine shears is lowered, pressing the tape;

m) the lower caliper of the guillotine shears with a chevron knife rises, cutting the tape;

o) the upper caliper of the guillotine shears rises;

o) the input stamp of the carriage rises and the carriage moves back twice the height of the corrugation, the installation is ready for the next molding cycle. If there is no need to cut the tape into measured lengths in this molding cycle, items l), m) and n) are omitted.

The proposed installation allows you to expand technological capabilities due to the possibility of producing corrugations with a large ratio of height to thickness, increasing the product range in height, width and pitch of the corrugations, reducing the transition time to another standard size of corrugations, increasing the accuracy of corrugations in step and height, reducing the number of subsequent technological operations .

These advantages are realized through the use of a hydraulic drive of forming tools, the execution of the side surfaces of dies with overlays for a snug fit of the corrugation edges, placement on the input side of the wire assembly to ensure the flatness of the tape, its centering along the installation axis and elimination of deformation of its edges, as well as due to its location on the output side of the installation of guillotine shears for dividing the corrugated tape into measured lengths.

Claims (3)

1. Installation for corrugating a metal tape containing a bed, stamps placed on it for clamping and crimping the tape, a forming punch placed between the stamps installed with the possibility of horizontal and vertical movement, while the stamp on the input side of the installation has the possibility of vertical and horizontal movement, different the fact that the stamp on the output side of the installation is installed with the possibility of vertical movement, the forming punch has a housing and is made with the possibility of its a constant symmetrical position relative to the said dies by giving it horizontal movement with a speed half the speed of movement of the stamp from the input side of the installation, by kinematic connection with it, and the specified kinematic connection is made in the form of a gear fixed to the body of the forming punch connected by engagement with the rail fixed on the bed and the rail associated with the stamp from the input side of the installation, the inner side surfaces of the stamps are made with fixed n these plates, the total thickness of which is equal to the thickness of the forming punch, and the vertical movement of the forming punch and the dies and horizontal movement of the die to the inlet side of the unit used hydraulic actuators. 2. Installation according to claim 1, characterized in that it is equipped with guillotine shears located on the output side of the installation, the lower caliper frame of which with a chevron knife fixed to it is suspended on the levers of the installation bed, and the upper caliper is mounted to move along the guides of the lower caliper frame by means of hydraulic cylinders, the housing of which is pivotally attached to the frame, and the rods are attached to the upper support body. 3. Installation according to any one of claims 1 and 2, characterized in that it is equipped with a wiring unit located on the input side of the installation, consisting of a lower base plate located on the installation bed, centering rulers and a pressure device located on top with the possibility of vertical movement with using hydraulic cylinders with a synchronizing shaft.

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