SU524631A1 - Machine for making multi-layer corrugated metal - Google Patents

Description

The invention relates to the manufacture of multilayer corrugated metal by combining corrugations with a metal sheet by brazing and can be applied in aviation, shipbuilding and other

industries.

A known aggregate for the manufacture of a multi-layer corrugated metal, mainly by soldering, comprising roll-unwinding devices, rollers with a corrugated surface for forming corrugations that are in engagement with each other, drive and non-driven rollers and rollers for pressing and moving the treated sheets, bath with rollers for applying bonding agent, shears for cutting corrugated sheets into sheets, a common drive and heating devices for heating sheets.

The proposed unit differs from the known one in that it is provided with a grooved drum, hooked with its teeth with a lower grooved roller, and which covers the arc-shaped adjustable clamps, one of which performs the functions of a heater for melting

The other, hollow, forcedly cooled, is a solder mold, while an adjustable pressure device and two plates are installed behind the pressure rolls of the unit, one of which is designed as a heater and the other as a solder mold. The arcuate heater and mold are made of a flexible sheet with heated or cooled sections, and the toothed rim of the corrugated drum is equipped with electric heaters, for example tubular, fed through brush rings on the axis of the drum, while the heaters are equipped with gates with connections for supply to the soldering zone protective gas.

In addition, the toothed rim of the drum, arcuate heater and plate-heater are made of refractory metal with high ohmic resistance, such as tungsten, and the clamping device under the plate-heater is made in the form of a contact, forcibly cooled plate. Such an embodiment of a corrugator allows its use and provides the possibility of mechanized, continuous soldering of multi-layer corrugated metal from metal sheets, improves the quality of soldering of sheets with corrugation, and intensifies the processes of solder melting and soldering. FIG. Figure 1 shows schematically the first section for manufacturing a double-layer corrugated pan; in fig. 2 - the second section of soldering of a three-layer corrugated tray; FIGS. 3 and 4 have an arcuate heater, a crystallizer and a part of a corrugated drum with devices for supplying protective gas to the soldering zone and for cooling the soldered joints with air, a section; in fig. 5 — knife thrust holders for holding the corrugations on the teeth of the drum; in fig. 6 - corrugated drum with a toothed rim and an arcuate heater for electro-contact heating of solder; in fig. 7 is a refractory metal plate heater and a contact plate used for electrical contact heating; in fig. 8, 9 - flexible arc-shaped heater and crystallizer; in fig. 1О, 11 - the clamp in the form of a roller and a belt conveyor with a rack and pinion device for clamping a corrugated canvas to the heater plate and the plate-crystallizer. The corrugated rollers 1 are installed on the frame (Fig. 1) of the unit for forming corrugations from the web 2 supplied from the roll-unloader 3. The lower corrugated roller 1 is hooked with its teeth with a corrugated drum 4 equipped with contact rings 5 with brushes for powering electric heaters 6 for example, tubular, heating the toothed rim of the drum 4. To carry the paste of solder on the tops of the corrugations located on the teeth of the drum 4, there is a bath 7 with rollers. Limiters 8 hold the corrugation on the teeth of the corrugated drum and drum. An arc-shaped heater 9 and a mold 10 adjoin the teeth of the drum. The heater is heated by tubular electric heaters when working with low-melting solders and high-temperature Rod electric heaters when working with solders having a higher melting temperature. The upper part of the heater is connected to the axis 11. mold - with axis 12. To change the pressing force, the heater and the mold are equipped with screw adjusting devices 13 and 14 with springs for cold water supply serving There are nozzles 15. At the inlet of the grooved rollers 1, a heating device 16 is installed to heat the web 2, and a second heating device 17 is installed in front of the drum 4, equipped with a roller 18 for changing the direction of the web 19, which is fed from the unwinder 2O. To tension the webs 2 and 19, pressure rollers 21 and 22 are placed in front of the heating devices. A knife-shaped stop 23 is installed between the bath 7 and the roller 18. In order to improve the quality of soldering, to protect the corrugated sheet from oxidation, the corrugated rollers 1 are enclosed in a casing 24 into which protective gas is supplied. To change the direction of the double-layered corrugated basket 25, a roll 26 with a table 27 serves. In the manufacture of a large-width arc-shaped heater 9, it is proposed to be made of several sections equipped with two or three lugs 28, with which they are interconnected by a twisting rod. FIG. 2 shows the clamping rolls 29 on the frame of the unit, adjacent to the flat heater 30 in the form of a plate. This heater is heated in a manner similar to an arcuate heater 9 and serves to melt the solder and maintain it in this state for a predetermined time. A plate 31 which acts as a crystallizer adjoins this heater. Cold water is supplied to it, for example, to cool it through a series of nozzles 32. Roller bath 33 is installed in front of rollers 29 for applying paste to solder on corrugated corrugated webs 25. Rollers 29 are fed with web 34 from a roll-unwinding device 35. For heating this canvas heating device 36. Tensioning of the web is provided by pressure rollers 37. A three-ply corrugated web 38 is pressed against the slab ZO and 31 with a predetermined force with a rack 39. The pressing force is controlled by a screw device 40. The total tension of the corrugated lotnu around the unit is provided with one or more pairs of drive rollers 41 and rollers 29, rotating at the same speed. The rollers 41 are fed corrugated to the scissors 42, which cut it into sheets 43 of a given length. These sheets are then transported by the drive rollers 44 for laying. FIG. 3 shows an arcuate heater 9 in which a series of toothed or rod high-temperature electric heaters 45 is placed. To improve the quality of soldering, the arcuate heater is provided with flaps 46 on each side, in which the nozzles 47 are mounted for supplying a protective gas to the floating zone. Sh. 48. Shielding gas is supplied to the nozzles through pipe 49. The use of a damper reduces gas leakage, and a one-time supply of gas from two opposite sides ensures a relatively uniform pressure in the melting zone. To reduce heat losses, the heater is protected from the outside by thermal insulation 50. The flat heater 30 (Fig. 2) is also provided with side flaps with a number of nozzles, into which the protective ha is fed into the solder melting zone. FIG. 4 shows an arcuate crystallizer 10. For uniform cooling (| weed along its width, the mold cavity is divided into sections 51 by partitions. Cold water is supplied to each section along the row of nozzles 15 (Fig. 1) and drained along a drain row of nozzles into the pipe 52. In addition, the partitions provide rigidity to the crystallizer, it can be made of thin-sheet metal to improve thermal conductivity. To accelerate cooling of the sections and prevent overheating of the teeth of the drum 4, corrugated 2 is blown with one With cold air from a row of nozzles 53 installed in the side flap 54 or from a slotted duct. In the second section of the corrugator, similar air-cooling devices are installed in the solder crystallization zone. The knife limiters 23 (Fig. 5) apply pressure to the corrugations of the corrugation holding the guided blade 2 on the teeth of the drum 4. The small area of contact between these limiters almost eliminates the violation of the track from the solder paste applied to the tops of the corrugations. The thin grooves in these tracks, which are formed by the knife stops, during melting are eliminated due to the fluidity of the solder, ensuring a uniform weld seam. FIG. 6 shows an arcuate heater 9 with a grooved drum, used as electrodes for electrocontact heating of the corrugated web 2 and web 19 and the solder sandwiched between them. The arc-shaped heater 9 and the crown 55 of the drum 4 are made of refractory metal, for example tungsten, without a hole for tubular or rod items. The arcuate heater-electrode is supplied with a contact pad 56 for supplying current to it. The gear ring 55 of the drum 4 can be made wholly or from separate sections, which are provided with a dovetail connection, with which they are attached to the drum 4. When current flows between With an arcuate heater electrode and a ring gear, they heat themselves and heat the corrugated web 2 and the web 19 attached to it by contact. These canvases and the solder sandwiched between them are also heated by passing h through them current. The process of melting the solder and the areas connected with it is accelerated. The heating temperature within the specified limits is maintained by means of thermostats. FIG. Figure 7 shows the second section of the assembly, in which the heater-plate 30 is made of a refractory metal, such as tungsten, and is used for heating in an electrocontact way as an electrode. It is provided with contact pads 57 for supplying the flow of a. To ensure the passage of current under this heater-plate, a red copper contact plate 58 is placed, which is intensively cooled, for example, with cold water through the holes shown in the drawing, when working with solders having a high Melting Point. This plate is pressed with a predetermined force to the joined corrugated canvas 38 in order to ensure contact with it over the entire area and at the same time to ensure that this web moves between the slabs AOR and 58. The pressure rolls 59 and 60 can also be used for additional heating by electrocontact connected canvases. For this purpose, they are provided with brush rings. The upper roller 59 is made of refractory metal and serves to accumulate heat, and the lower one is cooled from red copper to prevent overheating of the lower part of the blade 38. Before these rollers, table 27 (Fig. 2) is replaced by cooled plate 61 to cool the bottom of the corrugated section 25 in order to avoid disturbing its paired connections. FIG. Figure 8 shows a flexible arcuate heater consisting of a flexible metal sheet 62 to which a number of rectangular sections 63 are attached in cross section. The uppermost section is rounded and connected to the axis 11, and the lower section is extreme to the tensioning device 13. In order to reduce heat losses, this heater is protected by a thermal insulation layer 64 enclosed between two flexible sheets. The inner sheet 65 has in the upper part a number of cuts in which

pins 66 are installed, screwed into section 63. When the heater is bent, the end of the sheet 65 moves between these pins. The section is heated by a tubular and rod electric heater 45.

Claims (3)

The arcuate mold (Fig. 9) is flexible, made of a thin flexible sheet 67, such as copper or brass, to which a number of hollow sections 68 are attached from the same material. Each section is provided with nozzles 69 on two opposite sides for supplying and discharging cold water. FIG. 10 shows a second variant of the crimping mechanism for the slabs 30 and 31 using a row of 7 O rollers. With sufficient rigidity of the double-layer corrugated blades 25, a series of rollers 70 equipped with adjustable clamping devices can be used for the clamping. For this purpose, these rollers are mounted on a common frame (not shown in the drawing), which is provided with screw devices for adjusting the clamping force. FIG. 11 shows a third variant of pressing the corrugated tray to the plates 30 and 31 in the form of a belt conveyor 71, equipped with a rail 72 for adjusting the clamping of the tape against the corrugated chute. The corrugator is equipped with a drive with a variable speed control. Such an actuator provides the selection of the optimal technological mode of soldering both at the melting point of the solder and at the crystallization area. Heating devices for preheating the webs can be made in the form of tunnel-type electric furnaces, into which a reducing gaseous medium, such as hydrogen, is supplied to reduce oxides on the surface of the webs. Claim 1. A unit for making a multi-layer 5-corrugated metal, mainly by soldering, comprising roll-unwinding devices, corrugated rollers for forming corrugations, drive and non-drive rolls and rollers for pressing and moving machined cloths, bath with rollers for applying a binder, a common drive, heating devices for heating cloths and scissors for cutting corrugated webs into sheets, characterized in that the purpose of providing the possibility of mechanized continuous soldering of multilayer corrugated metal from metal cloths, the unit is equipped with a drum with a gear rim, hooked with its teeth with one of the grooved rollers and coils two successively arranged arcuate adjustable clamps, one of which is used as a heater for melting solder, and the other, hollow, cooled as the solder's crystallizer, while an adjustable pressure device and two successive plates are mounted behind the pressure rollers of the unit of which is used as a heater, and the second - as a solder mold, 2. The assembly of claim 1 is also distinguished by the fact that, in order to improve the quality of soldering, the arcuate heater and mold are made of a flexible sheet with heated and cooled sections, and the toothed crown of the drum is equipped with electric heaters, to which the current lead is located on the axis of the drum contact rings with brushes, while the heaters are equipped with valves with pipes for supplying the protective gas to the soldering zone. 3. The assembly according to claim 1, characterized in that, in order to intensify the processes of soldering and soldering, the toothed rim of the drum, the arc-shaped heater and the heater plate are made of a refractory metal with high ohmic resistance, and the pressure device under the plate is The heater is filled in the form of a contact, cooled plate. 2G3329  turned Fig.Z Zone, I Zone / three hundred / r / ru, I t F jf l gj a Cold oZaffff. Solder 2 LGT -W F 23 U2.S 5B Zashchishn I gas) (cold} 1 Soda 3atfuu n unffjf nineteen 63 five iPuzd thirty 38 /  - ev ff7 1g. YU J / / : S t 12 grig.p