RU1796311C - Method of making bent section and line for performing the same - Google Patents

Abstract

Usage: ferrous metallurgy and other industries in the manufacture of bent profiles of high production readiness. SUMMARY OF THE INVENTION: a roll stock after unwinding dressing and cutting the front end enters the press for punching the front group of holes and a partial transverse cut in the place of the future division of the profile into measured lengths. Then, the strip enters the roll forming mill, and after forming, into the device for punching a group of holes and simultaneously dividing it into measured lengths. The method is implemented on a line comprising a roll accumulator, an uncoiler, a straightening machine, scissors, a punch press with a transverse notching device, a roll bending machine, a punch press with a device for the final separation of profiles, an outlet roller table. 2 s.p. f-ly, 6 ill.

Description

The invention relates to the processing of tall oil and is intended for use in the manufacture of bent profiles with high production readiness, mainly in the steel industry and in the construction industry.

The purpose of the invention is to improve the quality of the profiles of increased production readiness by increasing the accuracy of punching groups of holes.

In FIG. 1 shows the layout of the equipment line for. production of bent profiles of high production readiness; in FIG. 2 is a diagram of the punching of the front group of holes and the notch of the strip during its processing; in FIG. 3 is a view along arrow A in FIG. 1; in FIG. 4 is a diagram of fixing a cut location in a combined cutting device; in FIG. 5 is a diagram of centering a strip, punching holes, and cutting into measured lengths; in FIG. 6 is a section BB in FIG. 5.

According to the claimed method, in the process of manufacturing bent profiles, the rolled billet, after unwinding, straightening and trimming the front end, is fed through a loop device to a press for punching the front group of holes and partially cutting from the edges. In this case, the notch is made for a length exceeding the width of the bent elements by an amount equal to the outer radius of the curved sections of the finished profile. Then, through the drive, the processed strip enters the roll forming mill, where it is shaped until a given cross-sectional shape is obtained. Received

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the profile enters the punch press with a device for the final separation of the profiles, in which the rear group of holes is punched and the profiles are divided into measured lengths. The device for separating profiles is equipped with a catcher and a knife in the form of a flat-movable element with a wedge-shaped working part formed by diverging cutting edges, which allows centering and separation of profiles of a wide range. After cutting, the profiles are fed through horizontal horizontal rolls to the drive roller table to transfer them either to the formation of bundles of finished profiles or to another process stream.

The inventive method can be implemented on a line containing a roll accumulator 1, an unwinder 2. With a loading device and a roll end bend, a straightening machine 3, transverse cutting shears 4, a looper with driven input and output horizontal rolls 5, a punch press and partial notching 6, drive 7, roll forming mill 8, volatile combined cutting device 9, pulling drive rolls 10, take-up roller table 11, 12 — mechanisms for forming packs of finished profiles or transferring them to. another process stream.

The claimed method for manufacturing bent profiles is implemented on the described line as follows. The rolls with a strip are installed in the drive 1, which receives three or more rolls, which alternately moves them to the area of the loading device. Depending on the size and arrangement of the rolls, the drive can be arranged sequentially in the mill line along one axis with it, or with an offset along the unwinder axis. The rolls from the accumulator are installed by the unit of the unwinder 2 in a piece onto a drum, where centering is carried out, strips 13 along the mill axis, removal of the binding tape, bending of the front end and transfer to the guide rollers of the correct machine 3. Strip after dressing. arrives at the guillotine shears 4 for cutting the front end, as well as for cutting defective sections of the workpiece, and then to the looper 5, which ensures continuous operation of the unwinder 2, the straightening machine 3 when the strip stops periodically when punching the front group of holes and partially cutting the workpiece in the transverse direction. Next, the strip enters the press b, where the front group of holes is punched and a partial notch of the strip is made from the side of the edges at a distance equal to the length of the finished profile. Then the strip enters the drive 7, ensuring the continuity of the roll forming mill 8, producing a shape change

strips and obtaining a profile of a given configuration of the cross section and then into a volatile combined cutting device 9, centering and fixing the profile with respect to the knife in

the place of cut and simultaneous punching and cutting into measured lengths. The cut profile with the help of pulling drive rolls of the outlet device 10 is transferred to the drive roller table 11, which accelerates the transportation of the finished profiles to the mechanisms 12 for the formation of bundles or their transfer to another process stream. Press 6 for punching the front

groups of holes and partial notching of the strip 13, contains feed 14, 15 and pulling 16, 17 drive horizontal rolls, providing movement of the strip in the area of the stamp 18c tension due to

differences in angular velocities of rotation of the roll pairs ft; 2 yl. The upper rolls 14, 16 are made with the possibility of vertical movement necessary to adjust the working gap when switching from one thickness of the processed strip to another, as well as creating conditions for the movement of the strip without slipping. The lower rolls 15, 17 are made with a fixed axis of rotation and are mounted so that

lines of contact with the bottom surface

strips were located at the molding level

roll forming mill. Stamp 18 consists

from the upper movable plate 19 and the lower

fixed plate 20. On the movable plate, interchangeable sets of punches 21 are installed for punching the front group of holes of a given shape and their relative position, as well as knives 22 for partial notching of the strip from the edges and

a clamp 23 for pressing the strip 13 to the lower plate 20. The press is equipped with a device for adjusting the pitch of the notch and punching 24, controlling the drives of the press, rolls 14, 15 and 16, 17, as well as the supplying control pulse to the control system of the volatile mm combined cutting device 9. The press operates in two modes. The first mode is manual, in which the strip 13 is introduced into the gap between the rolls

14, 15 and is clamped by moving

the upper roll 14 in the direction of the lower roll 15. Using these rolls, the strip is carried out into the working area of the stamp 18 as far as the knives 22. The upper plate of the stamp 19 occupies a position where the knives 22 enter the slots 25 of the lower plate 20 and the punches 21 and the clamps 23 are located in relation to the strip with the gaps L2AA 1, respectively, with D A 2 (initial position). The springs 26 ensure that the upper plate 19 is held in a position in which during storage the punches 21. and the knives 22 do not come in contact with the matrices of the lower plate 24, 27. During the press stroke, the punched front group of holes is accurately based on the end face of the workpiece by its emphasis on the knife 22, pressing and punching punches 21 at the same time all holes with a given tool accuracy. In this mode, the device for adjusting the pitch of the notch and punch 24 does not work. The second mode is automatic, in which initially the front end of the strip with punched holes with the help of drive rolls 14, 15 and 16, 17 is carried out along the support rolls 28, 29 to the device for adjusting the pitch of the notch and punching 24, installed behind the press, in the direction of travel of the strip . When changing from one profile length to another, the step adjusting device 24 can either move along the axis of the line so that the distance between the axis of the movable roller 30 and the middle plane of the knives 22 is equal to the length of the finished profile L Lnp, or can be installed stationary at a distance from the average plane of the knives is equal, for example, to the minimum length of the finished profiles L. Lnp min. In this case, the movable roller 30 is located in relation to the support roll 31 in the lowermost position with a gap D s equal to

A s S - D / 2 T - cos (arcsin b / Dj,

where S is the thickness of the processed strip, mm;

b - the width of the cuts from the edges, is equal to the width of the knives 22, mm;

D is the diameter of the movable roller 30, mm, The roller 30 under the action of the spring 32 is constantly pressed against the roll 31, a. during operation of the line, to the machined strip 13, with a constant force, adjustable by a screw 33. The response time of the step adjustment device is adjusted by setting between the rolls 30, 31 the gap G, specified for a given thickness of the strip, of Az and

setting contact groups of the sensor 34 for their operation. During operation of the step adjusting device, when the roller 30 rolls over the surface of the strip 13. the sensor does not work. At the moment when the roller enters the slot, it moves and at the moment when the gap A s becomes equal to the preset value, the sensor 34 is triggered. It feeds the signal to the control unit (CU) 35, which turns on the press drive 6 and shutting down the roll drives 14, 15 and 16, 17 (arrows a, b, c), and also gives a signal to the volatile combined cutting device 9 (arrow d). After the working stroke is completed, the control unit disengages the press drive 6 and turns on the drive of the rolls 14, 15 and 16, 17 to move the strip until the next stop and the working stroke of the press.

0 In order to exclude dynamic impacts when the roller 30 enters the slot, the notch and punching step adjustment device 24 is equipped with a path sensor 36 installed with an offset I in the opposite direction to the strip movement, which gives a command to smoothly decrease the strip moving speed to the value at which the roller the path sensor 36 enters the slot without impact. Flying Combined

0. the cutting device 9 is a press mounted on a movable carriage 37. In the press there is a combined stamp 38 with a knife 40 installed in the upper movable plate 39, pallets 41 and clamp 42, and in the lower fixed plate 43 corresponding to the slotting tool and openings for it passage when performing the functions of punching and cutting to measured lengths. Exact coincidence of punches and dies is provided by guides 44, and springs 45 hold the top plate in position (stamp storage process), in which the punches 41 and knife 40 do not contact the dies

5 of the bottom plate 43. On the bottom plate in the area of the slot for the knife to pass, catchers 46, 47 are installed on both sides, which are constantly pressed by the springs 48, 49 to the shelves of profile 50. Until

0, the approach of the profile section with slots 51 to the flying combined detachable device, the signal from the control unit (CU) 35 (arrow d) starts the carriage drive, which begins to move towards the profile moving 5 with a speed lower than the profile speed and at the moment the slots coincide with the catchers, they move (hit) into the slot 51 and pre-fix the profile 50 with respect to the stamp 38, which then begins to move with the speed of the profile Vn. At the moment the profile is fixed, the sensor 52, kinematically connected with the catcher, instructs the press to make a working stroke (arrow e), during which the knife 40 is introduced into the profile grooves 51 and finally centered, then press it to the bottom plate 43 , punching with punches 41 of the back group of holes and simultaneous removal of the bridge 53 (cutting the profile into measured lengths). The knife used in cutting is made in the form of a flat movable, together with the upper stamp plate 39, element with a wedge-shaped working part formed by diverging cutting edges 54. On the side surfaces of the knife in the region of the centering sections there are conical parts 55 that are in contact with the catcher when performing a working stroke, during which they exit the slots. At the end of the movement of the carriage 37, which coincides with the end of the movement of the upper plate, the catchers withdrawn from the slots come into contact with fixed grippers (not shown), which, when the carriage moves backward, initially hold the catchers, skipping the end face of the profile, which are freed from them come into contact with the shelves of the profile 50. As shown by the calculation results as a result of using the claimed method of manufacturing bent profiles and lines for its implementation provide ready-made profiles with maximum deviations of length up to ± 1.0 mm, the location of the groups of holes relative to the mountaineers - up to ± -0.25 mm, the pitch of punched holes in the groups - up to ± 0.1 mm. According to the calculations and design studies of the claimed invention, Compared with the prototype, it has the following advantages:

a) provides increased accuracy along the length of finished, profiles and the location of the groups of holes in relation to the ends (limit deviations of the length up to ± 1.0 mm, the location of the groups of holes in relation to the ends to ± 0.25 mm of the pitch of punched holes in the groups to ± 0.1 mm), while in the manufacture of similar profiles on the line according to the method adopted as a prototype, there are deviations in the pitch of punched holes of not more than ± 0.4 mm, the location of the holes relative to the edges of the shelves, walls and ends - no more than ± 2.5 mm, lengths of finished pros lei + 30 mm (for lengths up to 6 m) and + 5 mm (for lengths over 6 m).

b) the use of the claimed method and line for the production of bent profiles with increased production readiness will make it possible, in comparison with the prototype, to produce bent profiles with increased accuracy in punching groups of holes, to increase the stability of the process of manufacturing profiles,

The inventive method for manufacturing bent profiles and a line for its implementation is of significant interest to the national economy, as it will automate the process of manufacturing bent profiles with increased production readiness, reduce the complexity of their manufacture and assembly both in the factory and in the field.

Claims (3)

1. The method of manufacturing bent profiles, including the accumulation of rolls and feeding them to the uncoiler, straightening the strip, cutting the front end, accumulating the raw strip, punching holes and transversely cutting the workpiece at the place where the profile is divided into measured lengths, accumulating the processed strip, forming the profile and the final dividing the profile into measured lengths, characterized in that, in order to improve the quality of the profiles of increased production readiness with groups of holes at the front and rear ends of the profile, In order to increase the accuracy of punching of hole groups, simultaneously with the transverse notching of the strip at the place of profile separation before forming, the front group of holes is punched, and at the same time as the final separation of the profile into measured lengths, the rear hole group is punched. 2. The method according to claim 1, wherein the notch is made from the side of the workpiece edges by a length exceeding the width of the bending elements by an amount equal to the outer radius of the curved sections of the finished profile. 3. Lines for the manufacture of bent profiles, comprising a roll unwinder, a straightening machine, scissors, a punch press, a device for transversely cutting a profile, a forming mill, characterized in that it is equipped with an additional punch press with a device for final separation - profiles installed along the way the technological process behind the molding mill, and the device for the transverse cutting of the profiles is placed on a punch press installed in front of the molding mill, + L FigЈ fig.Z 38 ft No. M 39 46 40 5b - GT-t - f, i ---- t Г --- I-- Fm. 5. 6-6 FIG. 6.