SU749607A1 - Production line for producing welded beams - Google Patents

Description

(54) FLOWING LINE FOR MAKING WELD BEAMS

The invention relates to welding, in particular to the design of a production line for the manufacture of welded beams, preferably transverse beams of truck platforms.

A known line for the manufacture of transverse beams of a car frame, comprising in its composition three consecutive sections interconnected by inter-part transport devices and buffer storage depots. In the first section, the lines are branched into two symmetrical parts with their subsequent merging into one stream. The line consists of feeding shops, manipulators, welding and assembly stands, clamps, self-propelled automatic welding machines, conductors, reloaders, rotary tilters, auto operators of the unloading trolley, lifting device 1.

Welding in this line is carried out by self-propelled semiautomatic arc welding machines COi along a broken line and straight seams. There is an automatic welding of four shchv at the same time with four automatic machines.

The disadvantage of this line is low productivity (50 workers — 189,000 beams per year), determined by the beam design, the manufacturing process (first in the line two subassemblies are made and then both subassemblies are assembled and welded together with the main arc) with seams on broken and straight. In this connection, the design of all parts of this line has insufficient capacity. In addition, with this arrangement and design, this line can not be applied in the manufacture of cross beams of the car platform “ZIL.

Also known is the production line for the manufacture of welded beams, mainly transverse beams of truck platforms, containing processing equipment placed on the base along the line, including beam element feeders, welding units for welding walls and shelves of beams, which are displaced. technological equipment along the line, including feeders for elements of the beams, which include self-propelled carts transported along the line along the line welding machines, finished product accumulators, as well as a step conveyor and devices for transferring products from the step conveyor to the welding units and back to the step conveyor 2 parallel to the process equipment. The disadvantage of this production line is that it is inefficient because it does not provide devices for reloading from a stepper conveyor to automatic welding machines and back to a stepping conveyor. To create such a production line, which would be more productive due to ensuring welding in devices for transferring from a stepping conveyor to automatic welding machines and back to a stepping conveyor, each arc welding automatic machine is mounted on a self-propelled carriage that can be rotated from an individual drive in the plane perpendicular to the longitudinal axis of the production line, and the drive of the mix, of each self-propelled trolley of the welding machine, is equipped with the programmer of the step mix, along the welded beam, about Providing a predetermined sequence of welding points, while the device for overloading from the stepper conveyor to the installation for welding the beam walls is made in the form of clamp grippers with beam clamps, the shaft is fixed between the stepping conveyor and the guides for the trucks, the grips are hinged on the rods fixed to the shaft and its racks can be rotated in a plane perpendicular to the longitudinal axis of the production line, and the device for transferring from the stepping conveyor to the installation for welding the flanges of the beam made also in the form of claw grips with beam clamps similar to the clamp claws of the device for transferring from the step conveyor to the installation for welding the beam walls, between the step conveyor and the guides for the carriages on the racks the shaft is mounted, the tongs for the flanges of the beam are mounted on the rod with the possibility of bending the beams around their longitudinal axis and turning them in a plane perpendicular to the longitudinal axis of the production line, and on the stepping conveyor there are C-shaped cradle for beams Racks located in the installation zone for welding the beam walls and in the form of T-racks located in the installation zone for welding the flanges of the beam. FIG. 1 shows a flow line when viewed from the side, a general view; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. one; in fig. 4 is a view along arrow B in FIG. 3; in fig. 5 shows a section B-B in FIG. one; in fig. 6 - section G-Y in FIG. one; in fig. 7 is a view along arrow D in FIG. 6; in fig. 8 is a section E-E of FIG. 7; in fig. 9 is a view along arrow AND in FIG. 7; in fig. 10 is a section C-C in FIG. one; in fig. 11 is a section LL in FIG. one; in fig. 12 is a section M-M in FIG. one; in fig. 13 shows the product to be welded. The proposed flow line consists of a step conveyor 1 (see Fig. 2) containing carts 2 interconnected by stitches, and a drive 3 with a hydraulic cylinder 4. The flow line has feeders 5 beam elements, a lifting device 6, welding units 7, a device 8 unloading of finished beams, conveyor 9 and removable containers 10, electrical equipment with signaling means, pneumatic equipment with pneumatic hydraulic equipment. The number of feeders in a line is determined by the need for its uninterrupted operation. The feeder of the elements of the beams consists of a screw lift 11, a platform 12, a removable container 13, a conveyor 14 located above the platform 12. On the beam 15 there is installed a stacker 16 containing a movement cylinder 17. Beam welding installations contain mite type arc welding machines 18 installed on the lateral surface of the frame, and devices 19 for reloading products from the stepping conveyor to the welding installations and back to the stepping conveyor, as well as the pneumatic equipment cabinet 20 for controlling the drives of the mechanisms. The trolley 2 of the stepping conveyor contains cradles 21, made in the form of C-shaped racks, in the upper part of which there are platforms 22 for placing the product and retainers 23 of the beam. The device 19 consists of racks 24 on which shaft 25 is mounted. On racks 24 and on the hooks 26 of shaft 25 there are levers containing arms 27 with platforms 28 and centering pins. Levers 29 are mounted on the shoulder 27 on the shaft 25, which serve to press the beam to the platform of the device arm 27. In order to center the saturation details, the platform of the tick lever lever 27 contains additional locking devices 30 of the beam. The clamp shaft is rotated by a hydraulic cylinder 31 and a gear transmission consisting of gears 32 and 33. This design of the device 19 allows for removal, movement and feeding of the beam for welding in the transverse direction without changing its position. In the welding machine, the welded beam is located wall down. For welding the flanges of the beam, clamp clamps 34 are used, fastened directly to the rod. Tick-borne grippers contain levers 35 with similar latches and levers 36. Such a tick-grip design allows for removal, movement of the beam around the circumference and its supply for welding in the transverse direction with changing position. In this case, in the tongs of the arc welding machine, the beam is spread horizontally by the shelf. In order to orient the saturation parts located outside the flanges of the beam, special mechanisms are made that contain stops and latches. The number of welding units with devices for reloading products from the stepper conveyor to the welding unit and back to the stepper conveyor, their location and alternation may vary depending on the complexity of the product and the accepted technological process. The number of welding plants operating simultaneously in the manufacture of one type of beams is determined by the technological process and is determined by the program provided for by the line control circuit. The device for unloading finished beams contains a tong clamp 37, the peculiarity of which is that the tong tong levers have travel stops and do not clamp the product. The grip 38 is similar in design to the one described above and serves to remove the product from the cart and feed it to the technical control. The finished beam unloading device 8 comprises a self-propelled carriage 39, vertical bar moving 40, and grippers 41. At the end of the line there is a conveyor 42 on which a removable empty container 43 and a removable filled container 44 are located. To control the supply of the container cell under the axis of the grippers of the device 8 containers contain protrusions that interact with the sensor mounted on the metalwork of the conveyor. The proposed line of the line works as follows. On platforms 12, which are in the upper position of the feeder 5, containers 13 are loaded loaded with basic parts. An empty container 43 is installed on conveyor 42. On the central control panel, the line is turned on and after all the initial position is loaded, one of the feeders begins to work right (see fig. 1). The screw elevator 11 lowers the platform 12 with the container 13 and lays a series of basic parts onto the conveyor 14, which moves them before contact with the sensor in the zone of the stacker 16 located above the conveyor 14. The stacker 16 removes the part from the conveyor 14 and transfers it to the zone of the scraper conveyor and lays on the cradles 21 of the carriage 2 on the latches 23. The sensor, located on the carriage 2, controls the part and sends a signal to turn on the drive 3, which moves the schagovy conveyor with the part to the next workplace. The stepper conveyor turns on the end sensor, and the control circuit turns on the drive of the lever 29, and then the drive of the device 19, which, turning, lifts the shoulder 27 and with its locks centers the part and removes it from the cradles of the carriage. Upon further movement, the part arrives in the same position in the zone of the arc welding machine 18. In the extreme position of the device 19, the schagovy conveyor returns to its original position, and the operator installs the saturation parts - amplifiers and turns on arc welding machines, which automatically perform welding of one p yes points. After the welding and unclamping of the tongs of the arc welding machines, the device 19 returns the beam to the next carriage of the stepping conveyor, with the arm 27 lowering below the beam level and the lever 29 expanding. During welding, the feeder 5 delivers the next beam and puts it on the carts. With the beams placed on the carts, the stepping conveyor moves to the schag and supplies them to the welding installations of the line. The first beam enters the next welding installation, where movements and operations are performed in the sequence described above and welding the second shvov on the beam wall. The beam is returned to the schagovy conveyor and moved one step further in the same sequence. At the subsequent welding installation, the tong-caught grip 34 by the arms 35 and 36 clamps and removes the beam from the carriage, turns it over and delivers it to the zone of the tongs of the arc welding machine. Similar movements are made at previous positions, and transport carts return to their original position. Arc welding machines produced welding on the beam flange and its parts saturation amps m. The welded beams are returned to the transport carts, the levers 35 are lowered below the level of the beams, and the levers 36 are raised. The beams laid on the carts are moved by a stepping conveyor to a step. At the previous positions, all movements are repeated, and at the position of the first product, a clamp jaw 34 located on the other side of the conveyor removes the beam from the trolley and feeds it into the welding zone with canting 90 °. The arc welding machines weld the second flange of the beam with amplifiers. In the following welding installations according to the technological process, after the beam is fed into the zone of the arc welding machines, the saturation parts are installed using fixed stops and latches. Then, after turning on the arc welding machines, saturation details are welded to the beams.

After all assembly and welding operations are completed, the beam arrives at the unloading device position. The flared grip 37 is rotated, the arm is wrapped around the beam, and then placed under the grippers 41 of the device 8. The cross member 40 is lowered, and the grippers 41 grasp the beam, then it is clamped and lifted up. The device 8 moves the beam to the zone where the container 43 is located and lowers it into the cell of the container 43.

Empty 43 and filled 44 containers are moved by conveyor 42.

The proposed line will produce at least 260,000 beams per year. The introduction of the assembly line of the assembly and welding of beam metal structures only on one line of the plant them. Likhachev PA “Mosavtozil for the assembly and welding of cross beams of the platform car“ ZIL will give an indicative national economic effect of 612,600 rubles. in year. At the plant them. Likhachev expects the introduction of two such lines.

Claims (2)

1.Sevbo P.I. Complex mechanization and automation of welding production. Kiev, “Technique, 1974, p. 381, fig. 113. 2. USSR author's certificate No. 522932, cl. 23 K 37/04, 1972 (prototype). WITH K-f View 5 Fig.Z 15 13 30 ill Fig.k View And Turned I-O- .L and FTZ 74960Г К- К ll