SU1139767A1 - Line for application of metal coatings on cylindrical articles - Google Patents

Abstract

1. METALIZATION LINE OF CYLINDRICAL PRODUCTS, containing the following successively installed devices for loading, cleaning pipes, metalization and unloading, roller tables located in loading and unloading areas, mechanism for working rotation speed and longitudinal feed of pipes and mechanisms for pressing drive rollers to the product, about t: l and h and y sch a. so that, in order to increase the productivity and quality of coatings, it is equipped with pipe filling devices in the mechanics of the working speed of rotation 1A and longitudinal feed of pipes into the unloading device, respectively placed behind the roller of the loading device and before the roller of the unloading device, and the mechanism of the task of rotational speed and longitudinal feed of pipes is made in the form of inlet and outlet units, respectively located in front of the pipe cleaning device and after the metallization device; It is filled in the form of discs connected to a rotational drive by means of a reducer, with a spring-loaded driving friction wheel mounted on the end of one disk, and mechanisms for clamping the drive rollers to the product and driven friction wheels located on the radial axes with the possibility installed on the end of another disk. reciprocating along them and connected by means of hinged couplings with the axes of rotation of the drive rollers.

Description

2. The line of metallization according to claim 1, characterized in that each mechanism for clamping the drive roller to the product is made in the form of a slide with guides mounted with the possibility of reciprocating movement at the disk end, and a spring-loaded sleeve placed in the slide guides and connected through a spherical hinge with the axis of the drive roller.

9767

3. The line metal position under item 1, characterized in that the pipe ramming device is designed as a movable carriage installed in the guides, on which the rocking arm with a rotary drive and roller pipe grippers on the free ends are articulated symmetrically relative to the pipe axis, Rotation of rocking chairs is made in the form of a hinged dvuzvennik.

The invention relates to the application of coatings by spray metallization and can be used in metalworking plants and metallurgical plants.

The known metallization coating line on a cylindrical product, containing a feeding device, pre-drying, cleaning, metallization chambers and a product transfer mechanism (1 3 The disadvantage of the known line is the lack of stability of the pipe processing process due to the gap between them in the working area cleaning and coating. The gap between the pipes in the working area arises from the fact that the carriage that receives the machined pipe reciprocates in With this, the next pipe can be fed into the working area only after the trolley returns to its original position. The range of pipe diameters is limited because the number of pipe sizes to be processed is determined by the number of steps on the chuck of cartridges. which significantly narrows the range of lengths of the pipes being processed (it is possible to process only lengthy pipes). In addition, it is necessary to use scarce DC motors to ensure the infinitely variable feed speed and rotation of the tubes, without which

the implementation of coatings of a given thickness. The line is also characterized by the complexity of synchronizing the actuators of the pushers, which require special expensive devices. When

the absence of a synchronizing device, the coating of pipes is uneven, which degrades the quality of coatings.

The closest to the present invention is the metallization line of cylindrical products, containing successively installed devices for loading, cleaning pipes, metallization and unloading, roller tables located in the loading and unloading area, the mechanism for the task of rotational speed and longitudinal feeding of pipes and the mechanism for driving rollers

to product C2.

In the known line, the gap between the pipes in the working area is eliminated due to the difference in the speed of the longitudinal feed of the intermediate roller, receiving and end roller conveyor, which is achieved by the difference in the angles of installation of the drive rollers.

The rollers are installed at different angles in different parts of the passage of the pipes in the line, as a result of which the pipes, moving first at one speed along the roller table, enter at this speed into the shot blasting chamber;

into the plating chamber. Only with

the moment the pipe is gripped by the setter of the operating speed, it begins to move at a given technological working speed. In this case, the speed of rotation of the pipe varies, since it also depends on the angle of installation of the drive rollers. Thus, the beginning of each pipe with a length equal to the segment from the beginning of the cleaning chamber to the speed adjuster roller supports is processed in the cleaning and metallization chambers with one speed (rotation and feed), and after the tube is picked up behind the speed sensor, it starts to process with a different speed so that leads to a deterioration in the quality of the coating due to the unevenness of its treatment at different sites. In addition, the difference in the angles of installation of the rollers leads to uneven dimensional and rapid wear of the drive rollers, which also leads to a deterioration in the quality of the coating. This is because the pipe, moving at one end in the roller of the speed controller, with the other end rests on the drive rollers of the receiving or end roller conveyors, the feed rate of which exceeds the feed speed of the speed controller. At the same time, the drive rollers of the roller tables are forced to slip through the pipe with friction, which increases the wear of the rollers of the roller tables, destabilizes the conditions of the speed controller and further deteriorates the quality of the coating, as a result of the wear of the rollers changes thicker and the quality of the coating. The diameter range of the pipes to be machined is limited due to the rigid attachment of the drive rollers. In addition, the axes of rotation of the pipes being processed are shifted when changing the diameter of one size to another. Since the drive rollers are fixed and the pipes of various sizes are placed on them, the axes of rotation of the pipes of different diameters are shifted relative to each other vertically. This leads to the need to adjust the equipment for cleaning and metallization (guns) not only in the horizontal plane but also vertically, which complicates the construction and creates additional technological difficulties, / reduces the capacity of the line in the case. There is also no adjustment of the flow rate and rotation of the pipes when replacing the standard sizes of pipe diameters. 7 L Since, for each pipe diameter, there is an optimal design speed of rotation and feed to ensure the desired thickness of the coating during metallization, it is necessary to adjust the feed and rotation speed of the pipes. In the known line, such adjustment is absent, and changing the speed by changing the angle of installation of the rollers is too laborious and does not provide the necessary accuracy, since the feed and rotation speed, besides the angle of installation of the rollers, is affected by many more factors (wear of the rollers, condition of the pipe surface and etc.). The lack of precise adjustment of the feed rate and rotation of the tubes further narrows the range of the processed tube diameters, and also makes it difficult to obtain coatings of a given thickness. The purpose of the invention is to improve the performance and quality of the coating. This goal is achieved by the fact that the metaplization line of cylindrical products, containing successively installed devices for loading, cleaning pipes, metallization and unloading, roller tables placed in loading and unloading areas, the mechanism for the task of speeding up and longitudinal feeding of pipes and mechanisms for clamping drive rollers to and the building is equipped with devices for filling pipes into the mechanism of the task of operating rotational speed and longitudinal feeding of pipes into the unloading device, respectively placed behind the roller table of the device loading and front roller-. the unloading device, and the mechanism of the task of working speed of rotation and longitudinal feeding of pipes is made in the form of inlet and outlet nodes, respectively, arranged by a lancer with a pipe cleaning device and after a metallization device, each node is made in the form of discs connected to a rotating drive reducer, and at the end of one disc there is a spring loaded friction wheel, and at the end of another disc there are mechanisms for pressing the drive rollers to the product and the driven friction wheels located e and radial axles with the possibility of reciprocating: moving along them and connected by means of hinged couplings with the axes of rotation of the drive rollers. Each mechanism for clamping the drive roller to the product is made in the form of a slide with guides, installed with the possibility of reciprocating movement on the face of the disk, and a spring-loaded sleeve placed in the slide guides and connected by means of a spherical hinge to the axis of the drive roller. The pipe filler device is complete in the form of a movable carriage installed in directions, on which the swivel rotates with a rotary drive and roller pipe grippers on the free-ended ends are hinged symmetrically relative to the pipe axis, the swivel rotor is designed in the form of a hinged dvuzvennik. On. FIG. 1 shows schematically the metallization line; the general view in FIG. 2 is the same, top view, in FIG. 3 shows the mechanism of the working speed problem i in FIG. 4 is a section A-A in FIG. one; in fig. 5 is a sectioned manipulator; FIG. 6 is a section BB in FIG. 4, in FIG. 7 - the unit is fixed to the support rollers of the live rolls. The metaplice line 151И contains a stack of 1 for pipe laying and successively installed loading devices 2 with a receiving roller 3, a pipe cleaning device 4, a metallization device 5 and a unloading device 6 with an end roller conveyor 7. The line also contains the mechanism of the task of working rotation speed and longitudinal feed of pipes The view is made in the form of two nodes 8 and 9 (input and output), connected with the rotational drive 10 (Fig. 3), respectively located in front of the pipe cleaning device 4 and after the metallization device 5. Each of the nodes 8 and 9 is made in the form of two discs 11 and 12 connected to a rotary drive 10 by means of a reducer 13 s — a cd-mode transmission 14. At the end of one disc 11 a driving spring 16 is spring-loaded with springs 15, and at the end of another disc 12 Mechanism1 1 of clamping 17 drive rollers 18 to the product (pipe) and driven wheels 76 mounted on radial axes 20 with the possibility of reciprocating movement along them and connected by means of twist joints 21 with axes of rotation i 22 driving rollers 18. Each pressing mechanism 17 of the drive roller 18 to the product is made in the form of a slider 23 with guides 24 installed with the possibility1 of reciprocating movement and a spring-loaded spring 25 / sleeve 26 placed in the guides of the slider 23 and connected via a spherical hinge 27 with the axis 22 of the drive roller 18. The line is also equipped with two devices dozshki 28 and 29 pipes (Fig. 1 and 2) in the mechanism of the task of working speed and in the unloading zone, respectively located behind the receiving roller table 3 and in front of the end roller table 7, each of which is made as installed in the guides 30 (Fig. 5 and 6) movably the carriage 31, on which the rocking chair 33 is hinged symmetrically with respect to the axis of the product 32 (pipes) 34 with roller pipe grippers 34 at free ends, and also sets the drive for a rocking chair 35 in the form of a hinged dialer 35 connected to a pneumatic cylinder 36 fixed on the carriage 31. The fastening assembly of the rollers 37 of the roller tables 3 and 7 is made in the form of two arms 38 pivotally interconnected with articulated rollers 37 at one ends, the other ends of which are made with longitudinal slits 39 for accommodating the pins 4 0 ha “to 41, installed with the possibility of reciprocating movement on the screw 41; having right and left threads. On the output line is set end shelf 43. The line works as follows. The pipes are laid on the receiving rack 1. The loading device 2 automatically carries out a piecewise transfer of the pipes to the roller conveyor 3. Next, the device 28 of the pipe docks is automatically included in the mechanism of the working speed task. When this works (Fig. 6), the pneumatic cylinder 36 of the rotation of the rockers 33 with the roller grippers 34, which clamp the pipe. After the pipe is clamped, the carriage 31 automatically moves, and then the pipe goes to the inlet 8 of the working speed task mechanism. After this tr, the womb is gripped by the drive spring-loaded rollers 18 and is automatically brought into rotational-translational movement. And the pneumatic cylinder 36 of the rotation of the rockers expands the grippers 34 and the carriage 31 automatically returns to its original position. The rotation and feed of the pipe in the mechanism of the task of speed is as follows. Drive 10 in front of VT rotation by means of gearbox 13 with wedge-belt transmission 14 to disks 11 and 12, which wrap, which are known at different speeds. In this case, the spring-loaded driving friction wheel 16 of the disk 11 drives the driven friction wheel 19 of the disk 12 due to the difference in speeds of the disks 11 and 12. The driven friction wheels 19 through the hinge couplings 21 rotate the axles of the 22 drive rollers 18, which the turn transmits rotational-translational motion to the tubes. The speed of rotation of the pipe is equal to the difference in the speeds of rotation of the disks. And the speed of longitudinal feeds is determined by the speed of rotation of the drive rollers, depending on the speed of rotation of the driven friction wheels 19. Installing the driven friction wheels 19 with the possibility of reciprocating movement on the radial axes of the disk 12 allows changing the speed of rotation of the wheels 19 in a wide range and, therefore, to change the speed of rotation of the drive rollers (the speed of the longitudinal feed. To avoid slippage of the tubes relative to; the drive rollers serve as a mechanism for clamping the drive rollers to the product. Us The three of each clamping unit is set to the specified pipe size in the following way: By moving the slider 23 along the guides 24, the spring-loaded sleeve 26 is preliminarily moved until the driving roller 18 contacts the surface of the pipe of the given size.The angle of inclination of the axis of the driving roller 18 to the axis rotation of the driven friction wheel is selected from the condition of ensuring the operability of the hinge coupling 21, which, as is known, should not exceed 45 °. The preliminary adjustment with respect to the position of the rollers of the roller tables 3 and 7 in order to ensure the constancy of the position (height) of the axes of pipes of different diameters is carried out as follows. By turning the screw 42, the nuts 41 move in opposite directions, moving the ends of the levers with the rollers apart or sliding. In this case, the pins 40 of the nuts are moved to the slits x 39, and the rollers 37 are mounted so as to ensure the constant position of the axis of the pipes of different diameters. Together with the reciprocating motion of the pipe, the input node 8 of the working speed task mechanism directs it with a given technological speed to the cleaning devices 4 and the metallization 5. At the moment when the rear end of the pipe leaves the speed control mechanism rollers 18 of the speed control task nozzle 8 is automatically fed command to load the next pipe. After this, the delivery mechanism 28 directs the next pipe to the input node 8 of the working speed task mechanism, Liquidating the interval between the pipes in the working area. Since the pipe length, which is known to be minimal, exceeds the distance between nodes 8 and 9, before the rear end of the pipe exits the inlet section 28, its front end engages with the driven rollers 18 of the outlet section 9, which continues to move the pipe back and forth with the same technological speed. The synchronization of the nodes of the mechanism of the task — whose speed is ensured by the fact that both nodes operate from the same drive 10 (Fig. 3). In the process of re-insertion of the pipe in the output unit 9, its front free end rests on the rollers of the end roller table 7, and at the moment when the rear end of the pipe leaves the output unit 9, the loading device 29 is turned on to the discharge zone, which moves the pipe to the discharge device. When the pipe approaches the end of the rack area 43, a gap forms between it and the next, allowing the unloading device B to transfer the pipes to rack A3. Thus, the stability of the treatment process in the working area (cleaning and metallization) is ensured ..

The design features of the line ensure the constancy of the feed and rotation speeds of the tubes as they pass through the cleaning and metallization chamber, which significantly improves the uniformity and quality of the coatings, stabilizing the working conditions of the mechanism of the task of working speed; complete elimination of slippage of water rollers through pipes and irregularity of wear, which affects the quality of coatings, simplifying the construction of the line as a whole by eliminating the need to adjust the cleaning and metallization devices vertically, extending the range of processing pipes to the diameter diameter 20-168 mm); accurate and independent adjustment of the feed rate and rotation of the pipes, allowing you to maintain an optimal processing mode (cleaning and metallization speed) for all pipe sizes; reduction of wear of the drive rollers and elimination of its influence on the quality and thickness of the coating, which increases the line capacity by 20%.

The economic effect from the use of the invention is 25., 7 thousand rubles. in year.

YES

FIG.

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Claims (3)

1. METALLIZATION LINE OF CYLINDRICAL PRODUCTS, containing sequentially installed loading, pipe cleaning, metallization and unloading devices, live rolls located in loading and unloading zones, a mechanism for determining the working rotation speed and longitudinal feeding of pipes, and mechanisms for pressing drive rollers to the product, about t \ The reason is that, in order to increase the productivity and quality of coatings, it is equipped with devices for adding pipes to the mechanism of the problem of working rotation speed and longitudinal feeding of pipes into the unloading device, located behind the roller of the loading device and in front of the roller of the unloading device, and the mechanism for the task of the working rotation speed and longitudinal feeding of pipes is made in the form of input and output nodes, respectively located in front of the pipe cleaning device and after the metallization device, each node is made in the form of disks connected with a rotation drive by means of a reducer, moreover, a spring-loaded _Λ driving friction wheel is installed on the end face of one disk, and clamping mechanisms are installed on the 3 ^ end of the other disk • drive rollers to the product and driven friction wheels located on radial axes with the possibility of • reciprocating / moving along them and connected via articulated couplings to the axes of rotation of the drive rollers. SU.n 1139767 2. The metallization line according to claim 1, characterized in that · each mechanism of clamping the drive roller to the product is made in the form of a slide with guides installed with the possibility of reciprocating. movement at the end of the disk, and a spring-loaded sleeve, placed in the slide rails and connected by means of a spherical hinge to the axis of the drive roller. 3. The metallization line according to claim 1, characterized in that the pipe sending device is made in the form of a movable carriage mounted in the guides, on which rocking wheels with a rotation drive and roller grips of the pipes at free ends are pivotally mounted to the pipe axis, and the rotation drive the rocking chair is made in the form of a hinged two-link. ί