SU1232331A1 - Apparatus for manufacturing tubes with annular corrugations - Google Patents

Description

The invention relates to the processing of metals by pressure, in particular to equipment for the production of corrugated products such as bellows.

The purpose of the invention is to improve the performance of the device by optimizing the nature and parameters of the movements of the corrugating tool, which eliminates repeated movements of the same mechanisms, reduces the inertia of the working bodies, which allows them to increase the speed of movement and to perform the time alignment of the latter.

FIG. 1 given hydrokinematic device diagram; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a sequence diagram of the operation of individual mechanisms and elements of the device (indicated in parentheses) in FIG. one; in fig. 4 shows a section BB in FIG. 2; in fig. 5 - 8 - consecutive position of the working bodies and the corrugating tool during one cycle of corrugation; in fig. 9 is a variant of the device with five pairs of profiled half-rings.

The device comprises a mandrel 1 with channels for supplying fluid to the deformable zone of the blank pipe 2, a corrugating unit and feeding the pipe to a step in the form of a corrugating tool, which consists of a package of semi-rings 3 and two smooth semi-sleeves 4 located on both sides of the blank pipe and placed in cage 5. Smooth semi-sleeves 4 are movably mounted relative to casing 5 and spring-loaded in it by springs 6. Casing 5 is provided with spring-loaded springs 7 by pushers 8 made in the form of round rods, driven axially by The space, made in the form of a swinging on the central axis of the link 9, associated with the crank mechanism 10 of continuous rotation using the axle 11. In the upper part of the link 9 has two branches with grooves covering the sleeve 5 from the sides through which it is using the crackers and axle 12 transmits an axial force to the yoke 5. This mechanism receives a continuous rotation from the electric motor through the V-belt drive 13, the worm pair 14 and the gear train 15.

The mechanism 10 is connected by a pin 16 and a rod 17 to a piston 18 of the pressure of the multiplier 19 supplied to the mandrel 1 of the working fluid. This connection allows simultaneous feeding of a portion of high pressure fluid into the forming zone during the working stroke of the outer cage 5. The multiplier 19 is built into the common supply line to the working fluid mandrel consisting of pump 20, two pressure spools 21 and 22, check valve 23 gauges 24 and quick-fit fitting 25 located at the end of the mandrel

1. This part of the mandrel is fixed in support 26 with its two coarse ones.

Profile semirings 3 in the amount of not less than two pairs are made floating in a fixed case 27. For this, it is equipped with a locking cylinder 28 and two profile channels 29, having a semicircle shape in cross section in accordance with the dimensions of the semiring. The half rings 3 are installed in the housing 27 with the possibility of their cyclic circulating plane-parallel movement of these channels.

For the consistent fate of the half-rings, the return spring 30 and the drives for yes and supplying each half-ring are provided in the formation of corrugations. In the case of several pairs of half-rings 3 (Fig. 9), the spring pushing the half-ring 3 into the return channel 29 is performed by the pneumatic cylinder 31 (not shown). Drives of the outlet-supply of half-rings are made in the form (Fig. 2) symmetrically installed in the housing 27, the branch 32 and the feed 33 clampers. Each gate is kinematically associated with mechanism 10 by means of end cams 34 and 35 mounted on

A shaft of a worm gear is a worm gear pair 14. Each cam 34 and 35 has two profile grooves 36 and 37 of the required configuration, where roller fingers 38 go, respectively, branch 32 and feed 33 slides.

0 Each profile semiring 3 is made in the plane of the connector with diametrically located notches 39, and the slider 32 with corresponding protrusions for gripping the semirings at their retraction.

In order to quickly retract the pushers 8 to the point of returning the cage 5, a locking mechanism is provided consisting of a latch 40, a lever 41 and a spring 42. At the end of the cage 5's withdrawal, the lever 41 interacts with the anvil 43, retracts the latch 40, whereby each pusher 7 occupies an initial position.

To provide the convenience of setting the desired amount of pre-corrugation (portion), there is a smoothly adjustable 45 on a scale of 44

5 half-sleeves 4 at the required distance from half-rings 3. The portion size is adjusted by shifting the stop 44 relative to the scale 45.

Mandrel 1 in the area of half-rings 3 is equipped with sealing elements in the form of a smooth

0 rigid plug 46, with which the formed corrugations provide a minimum annular gap, facilitating the free movement of the corrugated part of the bellows in the axial direction when

j the presence of fluid pressure at the time of the working movement of the cage 5. A smooth part of the pipe billet 2 is sealed, for example by using the rubber ring 47.

0

The device works as follows.

The drive of continuous rotation of the crank mechanism 10 and the pump 20 is turned on, the latter provides a continuous supply of the forming fluid to the mandrel 1 at a pressure not exceeding the shaping pressure of the Russian Federation adjusted by the valve 23. This moment corresponds to the start of movement of the holder 5 from the extreme right position (Fig. 1) to the left . The spring-loaded pushers 8, interacting with the semiring 3, make them move to the left against the stop (Figs. 5 and 6). The pipe is fed to form a predetermined portion of To.

At the same time, the piston 18 moving to the left, compressing the liquid, raises the pressure in the system to the value of P. A bulging of the formed gap occurs (Fig. 1 and 6). The sliding sleeve 5 approaches the flange of the semi-sleeves 4 held by the springs 6 from moving, and when they move together to the left, it settles (Fig. 7). FIG. 3 this time corresponds to 1 s. The same moment corresponds to the return of the feed gate 33 to its original position, after which the block of half-rings 3 under the action of the spring 30 moves in the direction opposite to the movement of the workpiece. Wherein

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the right rings 3 will occupy the position under the feed gate 33.

The sleeve 5, the half-sleeve 4 under the action of the scenes 9 and the piston 18 is returned to its original position. The pressure inside the mandrel drops. At the same time, under the action of the cams 34 and 35, the gates 32 and 33 are set in motion, which retract and feed a pair of profile half-rings 3 (Fig. 8). The system returns to its initial position (Fig. 5). Further, the cycle on the design of the next corrugation is repeated.

Such an embodiment of the device connects kinematically all the elements necessary for obtaining the corrugation, and optimizes, with continuous rotation of the drive, the performance of all the movements of these elements, which increases the productivity of the device. This makes it possible to produce one corrugation with one reciprocating movement of the holder 5 in almost 2 seconds (see the cyclogram). The specified productivity at consecutive molding on one corrugation is not able to provide any of the known types of equipment.

The proposed device has a large spectrum of action, since it allows the manufacture of corrugated hoses of considerable length.

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Claims (3)

1. DEVICE FOR MANUFACTURING PIPES WITH RING CORDS, containing a mandrel mounted on the base with channels for supplying working fluid and with sealing elements, a corrugation unit and a pipe feed unit per step in the form of a package of profile half rings with an input / output drive, two smooth half-bushings located in a holder equipped with a drive for its movement along the axis of the mandrel, and an adjustable stop, as well as a hydraulic system for supplying a working fluid, characterized in that, in order to increase productivity, it is equipped with a fixed body catfish with a locking cylinder, with a return spring and with profile channels, the cage is equipped with spring-loaded pushers that are installed to interact with a package of profile half rings placed in a fixed housing, smooth half-bushings are made spring-loaded relative to the cage, the cage drive mechanism is made in the form of a crank-link mechanism and the hydraulic system for supplying working pressure is equipped with a multiplier, the rod of which is connected to the clip movement drive, while the profile supply and removal drive the half rings are made in the form of two pairs of parallel placed inlet and outlet gates of the half rings with grip elements of the half rings on the outlet gates and with cam mechanisms associated with the cage drive. 2. The device according to π. 1, characterized in that the gripping elements of the half rings are made in the form of symmetrical recesses on the half rings placed on the plane of the connector and the corresponding protrusions on each gate. 3. The device according to π. 1, characterized in that the profile channels of the fixed body are made with a semi-cylindrical bottom having a diameter corresponding to the outer diameter of the half rings. yo go yo go go Fig 1