SU1207562A2 - Machine for bending coil pipes - Google Patents

Description

112

The invention relates to the processing of metals by pressure, can be used in mechanical engineering for bending large-sized coils of complex geometric shape and is an improvement of the known machine described in the author. No. 935162.

The purpose of the invention is the expansion of technological capabilities by ensuring the formation of coils of complex shape.

Fig, 1 shows a machine, a general view; figure 2 - the same plan; in FIG. 3, section A-A in FIG. figure 4 - section bb in figure 2; figure 5 is a section bb In figure 1; figure 6 - section GG in figure 2 (the position of the additional clamp in the initial position); in Fig.7, the position of the additional clamp in the position of fixation of the pipe; Fig. 8 shows the layout of the bending mechanisms of the machine and the pipe lash in front of the flexible one; in Fig. 9 the same is in an intermediate position with relative rotation of the patterns by 90 (at the end of the first working stroke); 10 shows the arrangement of the bending mechanisms of the machine and the coil being formed before the second working stroke; FIG. 11 is the same at the end of the second working stroke (at the end of the first turn when forming the first section of the coil including the single-coil and U-shaped elements ); on Fig - the same, before the third working stroke (before the second cycle); Fig. 13 shows the same at the end of the second cycle (when shaping the second section of the coil, including the single-legged and U-shaped elements); on Fig (a, b, c, d, d, e) - a schematic representation of the coils of various geometric shapes, the formation of which is possible on the proposed machine.

The machine includes a T-shaped bed 1j in mutually perpendicular guides 2 and 3 of which carriage A is mounted and the support 5, supporting plate 6 is movably mounted in direction 7. On carriage 4, there is mounted a flexible head 8, made in the form rigidly fixed in the aforementioned carriage an axis-semi-mold 9, on which the holder 10 is pivotally mounted, gear 11, which is in contact with the rack and 12 and rigid; o-turn 13, the rail 12 is mounted with

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the ability to move in the guide groove 14 of the rim. In the casing 10, a bending radius changing mechanism 15 is mounted, consisting of a housing 16, based on supporting surfaces 17 and 18, in which an axis of rotation and driving gears 22 and 23 are mounted on axle 19 and mounted movably on a semi-axle x 24. 25, with gears 11 and 13.

In the upper part of the carriage 4, a cylinder 27 is mounted on the bracket 26, the rod of which is connected to the upper half-frame 28, and a locking mechanism 29 consisting of a slider 31 movably mounted in the direction 30 of the slide 31 and pivotally connected to the rod of the cylinder 32. In the cavity 33 a slider movably mounted a slider 34, spring-loaded with a spring 35, on the axis 36 of which the clamping tubes 37 and 38 are pivotally mounted, spring-loaded one relative to the other by spring 39 and in contact with the rollers 40 fixed in the slider 31 on the axis x41. The movement of the slider 34 is carried out by the stop 42 fixed in the bracket 26 and the stop 43 fixed in the slide 31. On the slide 5, a second bending head 44 is mounted, made in the form of an axis-semi-template 45 fixed in the slide and bearing rotatably mounted on it the holder 46, in the holder 46 is rigidly fixed by means of a clamp 47, driven by a cylinder 48, said gear rack 12. In the upper part of the support 5 on the bracket 49 are mounted a cylinder 50, the stem of which is connected to the upper half-plate. 51, and the locking mechanism 52, whose structures are identical to the design of the locking mechanism 29. The sleeves 10 and 46 are interconnected by guides 53. The bending heads 8 and 44 are equipped with clamps 54 and 55. On the supporting plate 6 in the guide columns 56 platform 57, coupled by a hinged-lever system 58 and a retainer 59 with a cylinder rod 60 fixed to the plate. The plate interacts with the stop 61 of the bracket 62, mounted on the caliper. Moving the carriage 4 and the caliper 5 in a mutually perpendicular direction 1 and 2 and 3 It is carried out respectively from

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hydraulic engines 63 and 64 by gear-rack gear 65.

A machine for bending coils of complex shape works as follows.

In the initial position, before flexibly the upper half-masks 28 and 51, the lifting plate 57 is lowered, the supporting plate 6 is in the forward position and connected to the support bracket 62 by means of the clamp 59.

The pipe string 66 is fed to a predetermined size in the streams of the lower half-patterns 9 and 45, after which the cylinders 27 and 50 are simultaneously switched on to close the half-sleeves, and the clamps 54 and 55 are turned on to clamp the bendable part of the tube pipe.

Simultaneously turning on the hydraulic motors 63 and 64, the carriage 4 moves to the right along the guides 2 and the caliper 5 along the guides 3, while the sleeves 10 and 46 are rotated around the axes of the half-patterns 9 and 45, the brushes 23, rolling around the gear 13, transmits rotation by means of gears 21, 20, 22 of gear 11, around which gear rack 12 is being rolled, the stroke of which determines the amount of convergence of the centers of the patterns of the bending heads 8 and 44, ensuring double-folding of the coulter. A prerequisite for this method of bending is the relationship between the magnitude of the pattern centers' approach and the sum of the arcs of the shapes formed, depending on the pattern radii when the pattern radii change, and the pattern approximation must be changed accordingly, otherwise the bend section will deform. whips} the analytical relationship between the radii of the patterns and the magnitude of the patterns coming together is determined by the dependence RU, (R (+ Ry is the radius of the driven gear 11 R, and RJ is the radii of i, the gear ratio of the radius change mechanism 15 is flexible.The bending process continues until the formation of the bent sections by 90 ° (Fig.9), after which the hydraulic motors 63, 64 and clamp 55 are turned off.

Turning the cylinder 48 on (retracting the rod) unscrews the rail 12 with the servo 46. By turning on the hydraulic motor 64, move the caliper 5 forward by the amount of the straight section of the U-shaped element being formed (figure 10), then the cylinder 48 is turned on the reverse the stroke is made by fixing the rail 12.

0 In order to perform the second working stroke, the section of the U-shaped element being formed needs to be fixed with the support fixing mechanism 52, for which by turning on the cylinder 32 (on pushing out the rod) the slide 31 together with the slide 34 and the clamping jaws 37 and 38 are lowered downwards (Fig. 6). When the polushka comes into contact with the stop 42, the clamping jaws withdraw from the pipe fixing position; upon further movement of the slide 31 downward, the spring 35 is compressed, and under the influence of the rollers 40, the jaws 37 and 38 clamp the pipe, overcoming the force of the spring 39.

Simultaneous switching of the hydraulic motors 63 and 64, further movement of the carriage 4 to the right and the caliper 5 is carried out and, consequently, the formation of the first section of the coil, including one-section and U-shaped elements (Fig. 11); This is the end of the ki-ki forming cycle ...

To perform the subsequent r. In the batch cycle, all the furs of the 13th machine should be returned to the original position, live and the following operations should be performed. Ma 54 is turned on and cylinder 32 is turned on for a return stroke, while the rollers 40, raised together with the slider 31, release the jaws 37 and 38, which unclamp under the action of the spring 39 and release the pipe. With further upward movement, the slider 31 with its abutment 43 acts on the slider 34 and raises it, withdrawing the nip from the fixation zone.

0 By switching on the cylinders 27 and 50, the upper half-patterns 28 and 51 are lifted, by turning on the cylinder 60, the plate 6 and the bracket 62 are unlocked and the platform 57 supporting the formed part of the coil is lifted.

Turning on cylinder 48 unlocks rail 12 from the barrel 5.

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My .46.1 By turning on the hydraulic motor 63, the carriage 4 is moved to the right by the amount of the straight section of the U-shaped element, after which the cylinder 12 with the holder 46 is fixed by turning on the cylinder 48 to reverse.

By simultaneously turning on the hydraulic motors 63 and 64, the carriage and support are reset to their original position (Fig. 12). The inclusion of the cylinder 60 (on the ejection of the rod) is carried out by fixing the plate 6 with

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bracket 62 caliper 5 and lowering the platform 57.

To perform the second and subsequent servo-shaping cycles, all of the above operations are repeated in the same analog sequence.

The use of these mechanisms in the aggregate ensures the production of coils of complex geometric configuration, and, thus, allows to significantly expand the technological capabilities of the machine.

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Claims (1)

MACHINE FOR FLEXIBLE COILS by ed. No. 935162, characterized in that, in order to expand technological capabilities by ensuring the formation of coils of complex shape, it is equipped with mechanisms for changing the bending radius and fixing the tubular lash mounted respectively on the carriage and support, and the mechanism for changing the bending radius is made in the form of the rotary holder of the carriage of the housing, while in the latter there is a block of driven and driving gears installed with the possibility of interaction by means of intermediate gears mounted on the axle shafts with correspondingly, with a fixed gear of the axis — the half-mask and gear gear, and the mechanism for fixing the tube whip is made in the form of a drive slide with a spring-loaded slide, on which sponges spring-loaded relative to the other are pivotally mounted, and rollers for interacting with the jaws and stops are mounted in the slide through the axis. to limit the stroke of the crawler. FROM 5s 7 * fig. f