Copper pipe preforming device for submarine optical cable and forming method

Abstract

The invention discloses a copper pipe pre-forming device for a submarine optical cable and a forming method, the copper pipe pre-forming device for the submarine optical cable comprises a base and a female die bottom plate installed on the base, the female die bottom plate is provided with a forming female die, the forming female die is provided with a groove narrowing gradually, and the female die bottom plate is further provided with two sets of die pressing assemblies matched with the forming female die; the pressing die assembly comprises a pressing die base and an L-shaped pressing die, a mounting block is arranged on one side of the pressing die base, a mounting hole is formed in the mounting block, a concave table is arranged on the pressing die base, the L-shaped pressing die is rotationally arranged in the concave table, an electric telescopic rod is further arranged on the mounting block, the telescopic end of the electric telescopic rod is connected with one side of the L-shaped pressing die, and the electric telescopic rod is connected with the other side of the L-shaped pressing die. And the pressure applying side of the L-shaped pressing die is matched with the shape of the groove. The invention relates to the technical field of copper pipe preforming processing, and particularly provides a copper pipe preforming device for a submarine optical cable and a forming method.

Description

Technical Field

[0001] The present invention relates to the technical field of copper tube preforming processing, and particularly to a copper tube preforming device and a forming method for submarine optical cables. Background Art

[0002] The feed copper tube is a metal tubular conductor used for transmitting high-frequency signals or large currents, and is widely used in fields such as communication, power transmission, and electronic equipment. As a part of the structure of a repeater submarine optical cable, the feed copper tube serves as an electrode and for fault location; the production of the feed copper tube for submarine optical cables is to bend a strip of copper tape, gradually deform it into a tube shape, weld the gap, and finally form a feed copper tube product through drawing and reducing the diameter. The quality of preforming affects the flatness, alignment, etc. when the two sides of the copper tape form a weld seam. A good preforming effect can ensure the stability of the copper tube during the production of large-section long submarine optical cables.

[0003] Currently, the common copper tube preforming methods include forming by a roller assembly and forming by die extrusion. The forming diameter range of the roller assembly is small, and the roller cost is high; the die extrusion forming is realized by a mechanical combined with manual method, and the preforming is not easy to control, and the forming effect is not ideal. Therefore, a preforming device and a forming method with low cost and stable control of forming quality are needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that in the existing die extrusion forming for making copper tubes, the preforming is not easy to control, the forming effect is not ideal, and the cost is high.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A copper tube preforming device for submarine optical cables provided by this solution includes a base and a die bottom plate installed on the base. A forming die is provided on the die bottom plate, and a gradually narrowing groove is provided on the forming die. There are also two groups of pressure film components on the die bottom plate that cooperate with the forming die;

[0006] The pressure film component includes a pressure die seat and an L-shaped pressure die. An installation block is provided on one side of the pressure die seat, and an installation hole is provided on the installation block. A concave platform is provided on the pressure die seat, and the L-shaped pressure die is rotatably arranged in the concave platform. An electric telescopic rod is also provided on the installation block, and the telescopic end of the electric telescopic rod is connected to one side of the L-shaped pressure die. The pressure application side of the L-shaped pressure die is arranged to match the shape of the groove.

[0007] Preferred Technical Solution 1: A pressure strip is also connected to the bottom of the pressure application side of the L-shaped pressure die by a thread, and the shape of the pressure strip is arranged to match the inner side of the groove.

[0008] Preferred Technical Solution 2: At the discharging end of the groove of the die pressing seat, there is a scraping component, which includes a first support rod fixed on one side of the die pressing seat where the groove discharges, and a second support rod fixed to the other end of the first support rod by screws. It also includes a fixing sleeve fixed to the other end of the second support rod, and a scraping block is installed inside the fixing sleeve.

[0009] Preferred Technical Solution 3: The installation hole is an oblong hole.

[0010] Preferred Technical Solution 4: There are four groups of fixing holes on the die bottom plate. The lower ends of four groups of bolts pass through the fixing holes and are threadedly fixed to the base. Four groups of pressure sensors connected by threads are also correspondingly arranged below the four groups of fixing holes inside the base.

[0011] Preferred Technical Solution 5: It also includes a powder blowing pipe. One end of the powder blowing pipe is externally connected to an air compressor, and the other end blows air into the formed die to regularly remove the copper powder generated in the formed die.

[0012] A forming method of a pre-forming device for copper pipes used in submarine optical cables proposed by the present invention includes the following steps:

[0013] Step 1: The copper strip after edge trimming enters from the wider end of the groove of the formed die and discharges from the gradually narrowing end.

[0014] Step 2: Install and adjust the die pressing seat to a suitable position, and connect and fix the die pressing seat to the die bottom plate by bolts passing through the installation holes.

[0015] Step 3: Set the upper and lower limits of the resistance value in the external controller, start the traction to pull the copper strip. When the copper strip is moving forward at a constant speed, the electric telescopic rod starts, and automatically adjusts the extrusion amount of the L-shaped die pressing according to the set resistance value. Under the combined action of the formed die and the L-shaped die pressing, the copper strip is pre-formed, and the copper wire and small particles on the edge of the copper strip are cleaned by scraping against the copper edge.

[0016] Step 4: Regularly start the air compressor, swing the powder blowing pipe under the copper strip, and blow air through the air blowing port into the gap between the formed die and the copper strip to remove the copper powder generated in the formed die.

[0017] A pre-forming device for copper pipes used in submarine optical cables and a forming method proposed by the present invention have the following beneficial effects when adopting the above structure:

[0018] (1) The preformed amount of the copper strip is stably controlled in real time to ensure the cleanliness of the side edges of the copper strip. The timed air blowing device can regularly clean the copper powder generated by friction, avoid the copper powder being brought into the molten pool, which may cause virtual soldering or missed soldering, and indirectly improve the welding quality of the product to ensure the welding quality of the copper pipe. The resistance of the preforming device to the copper strip is read through the pressure sensor in the base, and the upper limit of the resistance is set. When the resistance of the copper strip in the preforming device is greater than the set value due to abnormal die adjustment or other objective reasons, the device alarms and the production equipment automatically shuts down to avoid possible copper strip breakage production accidents.

[0019] (2) It can be applicable to various forming depth adjustments. The mounting holes are oblong holes, which are used to control the position of the die, so that the size and shape of the preformed copper strip can be adjusted. Brief Description of the Drawings

[0020] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0021] Figure 1 is the overall structural schematic diagram of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention Figure 1 ;

[0022] Figure 2 is the perspective structural schematic diagram of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention Figure 2 ;

[0023] Figure 3 is the schematic diagram of the L-shaped die of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention;

[0024] Figure 4 is the schematic diagram of the scraping assembly of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention;

[0025] Figure 5 is the schematic diagram of the die holder of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention.

[0026] Figure 6 is the schematic diagram of the forming female die of a copper pipe preforming device and forming method for submarine optical cables proposed by the present invention.

[0027] Among them, 1. Base, 2. Female die bottom plate, 3. Forming female die, 4. Groove, 5. Pressure film assembly, 6. Die holder, 7. Concave platform, 8. L-shaped die, 9. Mounting block, 10. Mounting hole, 11. Electric telescopic rod, 12. Pressure bar, 13. Scraping assembly, 14. First support rod, 15. Second support rod, 16. Fixed sleeve, 17. Scraping block, 18. Pressure sensor, 19. Powder blowing pipe. Detailed implementation mode

[0028] The following will clearly and completely describe the technical invention in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the accompanying drawings, and the words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0030] Embodiment 1

[0031] As Figures 1 to 5 shown, the technical invention adopted by the present invention is as follows: a preforming device for copper pipes used in submarine optical cables, including a base 1 and a concave die bottom plate 2 installed on the base 1. A forming concave die 3 is provided on the concave die bottom plate 2, and a gradually narrowing groove 4 is provided on the forming concave die 3. There are also two groups of pressing film assemblies 5 on the concave die bottom plate 2 that cooperate with the forming concave die 3. The copper strip enters from the wider end and gradually narrows to achieve preforming, preparing for circular formation later.

[0032] As Figures 1 to 3 shown, the pressing film assembly 5 includes a pressing die base 6 and an L-shaped pressing die 8. An installation block 9 is provided on one side of the pressing die base 6, and an installation hole 10 is provided on the installation block 9 for passing a bolt through the installation hole 10 and connecting and fixing it to the concave die bottom plate 2. A concave platform 7 is provided on the pressing die base 6, and the L-shaped pressing die 8 is rotatably arranged in the concave platform 7. An electric telescopic rod 11 is also provided on the installation block 9, and the telescopic end of the electric telescopic rod 11 is connected to one side of the L-shaped pressing die 8. The pressing side of the L-shaped pressing die 8 is matched with the shape of the groove 4. By driving the rotation of the L-shaped pressing die 8 and using the other side of the L-shaped pressing die 8 to cooperate with the groove 4, preforming of the copper strip is achieved. The installation hole 10 is an oblong hole for controlling the position of the pressing die, so that the size and shape of the preformed copper strip can be adjusted.

[0033] As Figure 3 shown, a pressing strip 12 is also connected to the bottom of the pressing side of the L-shaped pressing die 8 by threads, and the shape of the pressing strip 12 is matched with the inner side of the groove 4.

[0034] Among them, four groups of fixing holes are provided on the concave die base plate 2. The lower ends of four groups of bolts penetrate through the fixing holes and are threadedly fixed to the base 1. Four groups of pressure sensors 18 connected by threads are correspondingly provided below the four groups of fixing holes in the base 1. The pressure sensors 18 are connected to an external controller and are used to detect the force condition of the tooling above the base 1, that is, the friction force of the copper strip. The force value is transmitted to the controller, and an alarm threshold is set. When the resistance of the copper strip in the preforming device is greater than the threshold, the device alarms and automatically stops, thus avoiding possible production accidents of copper strip breakage.

[0035] Embodiment 2

[0036] On the basis of Embodiment 1, as Figure 4 shown, in order to scrape and clean the copper wires and small particles on the edge of the copper strip to facilitate subsequent process processing, a scraping component 13 is provided at the discharging end of the groove 4 of the die holder 6. The scraping component 13 includes a first support rod 14 fixed on the discharging side of the die holder 6 located in the groove 4, and a second support rod 15 fixed to the other end of the first support rod 14 by screws. It also includes a fixing sleeve 16 fixed to the other end of the second support rod 15. A scraping block 17 is installed in the fixing sleeve 16, and the scraping block 17 can be a polyurethane scraping block 17.

[0037] It also includes a powder blowing pipe 19. One end of the powder blowing pipe 19 is externally connected to an air compressor and the other end blows air into the forming concave die 3 to periodically remove the copper powder generated in the forming concave die 3. At the same time, the powder blowing pipe 19 can be a metal flexible pipe to facilitate adjusting the blowing position.

[0038] A forming method of a preforming device for a copper pipe used in a submarine optical cable proposed by the present invention includes the following steps:

[0039] Step 1: The copper strip after edge trimming enters from the wider end of the groove 4 of the forming concave die 3 and discharges from the gradually narrowing end.

[0040] Step 2: Install and adjust the die holder 6 to a suitable position, and connect and fix the die holder 6 to the concave die base plate 2 through bolts penetrating the mounting holes 10.

[0041] Step 3: Set the upper and lower limits of the resistance value in the external controller, start the traction to pull the copper strip. When the copper strip is moving forward at a constant speed, the electric telescopic rod 11 starts and automatically adjusts the extrusion amount of the L-shaped pressing die 8 according to the set resistance value. Under the combined action of the forming concave die 3 and the L-shaped pressing die 8, the copper strip preforming is completed, and the copper wires and small particles on the copper strip are cleaned by fitting the scraping block 17 to the copper edge.

[0042] Step 4: Start the air compressor regularly, swing the powder blowing pipe 19 below the copper strip, and blow air through the air blowing port into the gap between the forming concave die 3 and the copper strip to remove the copper powder generated in the forming concave die 3.

[0043] The die can adjust the preforming depth of the copper strip in real time through an electric telescopic rod, ensuring the stability of the copper strip in the production route, controlling the extrusion amount of the die in real time, and the two electric telescopic rods on both sides expand and contract simultaneously to ensure that the heights of the dies on both sides are always the same, thereby adjusting the preforming of the copper strip. By setting the upper and lower limits of the resistance value, the electric telescopic rod adjusts the extrusion amount of the die according to this set value and maintains this resistance throughout the production process.

[0044] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, material or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, material or device.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preforming device for copper tubes used in submarine optical cables, comprising a base (1) and a female die bottom plate (2) installed on the base (1), characterized in that, The forming die base plate (2) is provided with a forming die cavity (3), and the forming die cavity (3) is provided with a gradually narrowing groove (4). There are also two groups of film pressing components (5) on the forming die base plate (2) that cooperate with the forming die cavity (3). The copper strip enters from the wider end and gradually narrows, achieving pre-forming and preparing for subsequent circular forming. The film pressing component (5) includes a die pressing seat (6) and an L-shaped die pressing (8). One side of the die pressing seat (6) is provided with a mounting block (9), and the mounting block (9) is provided with a mounting hole (10) for connecting and fixing to the forming die base plate (2) by passing a bolt through the mounting hole (10). The die pressing seat (6) is provided with a concave platform (7), and the L-shaped die pressing (8) is rotatably arranged in the concave platform (7). The mounting block (9) is also provided with an electric telescopic rod (11), and the telescopic end of the electric telescopic rod (11) is connected to one side of the L-shaped die pressing (8). The pressing side of the L-shaped die pressing (8) is arranged to match the shape of the groove (4). By driving the rotation of the L-shaped die pressing (8), the other side of the L-shaped die pressing (8) is used to cooperate with the groove (4) to achieve pre-forming of the copper strip.

2. The preforming device for copper tubes used in submarine optical cables according to claim 1, characterized in that, The bottom of the pressing side of the L-shaped die pressing (8) is also connected with a pressing strip (12) by thread, and the shape of the pressing strip (12) is arranged to match the inner side of the groove (4).

3. The preforming device for copper tubes used in submarine optical cables according to claim 2, wherein, The die pressing seat (6) is provided with a scraping component (13) at the discharging end of the groove (4). The scraping component (13) includes a first support rod (14) fixed on the discharging side of the die pressing seat (6) corresponding to the groove (4), and a second support rod (15) fixed to the other end of the first support rod (14) by screws. It also includes a fixing sleeve (16) fixed to the other end of the second support rod (15), and a scraping block (17) is installed in the fixing sleeve (16).

4. The preforming device for copper pipes used in submarine optical cables according to claim 3, characterized in that, The mounting hole (10) is an oblong hole.

5. A preforming device for copper tubes used in submarine optical cables according to claim 4, characterized in that, The forming die base plate (2) is provided with four groups of fixing holes. The lower ends of four groups of bolts pass through the fixing holes and are threadedly fixed to the base (1). Four groups of pressure sensors (18) connected by thread are also correspondingly arranged below the four groups of fixing holes in the base (1).

6. The preforming device for copper tubes used in submarine optical cables according to claim 5, characterized in that It also includes a powder blowing pipe (19). One end of the powder blowing pipe (19) is externally connected to an air compressor, and the other end blows air to the forming die cavity (3).

7. A forming method of a preforming device for a copper tube used in a submarine optical cable according to any one of claims 1 to 6, characterized in that, Specifically, it includes the following steps: Step 1: The copper strip after edge cutting enters from the wider end of the groove (4) of the forming die cavity (3) and is discharged towards the gradually narrowing end. Step 2: Install and adjust the die pressing seat (6) to a suitable position, and connect and fix the die pressing seat (6) to the forming die base plate (2) by passing a bolt through the mounting hole (10). Step 3: Set the upper and lower limits of the resistance value in the external controller, start the traction to pull the copper strip. When the copper strip is moving forward at a constant speed, the electric telescopic rod (11) is started, and the extrusion amount of the L-shaped die pressing (8) is automatically adjusted according to the set resistance value. Under the combined action of the forming die cavity (3) and the L-shaped die pressing (8), the pre-forming of the copper strip is completed, and the copper wire and small particles on the copper strip edge are cleaned by scraping the copper strip edge with the scraping block (17). Step 4: Start the air compressor regularly, swing the powder blowing pipe (19) under the copper strip, and blow air through the air outlet towards the gap between the forming female die (3) and the copper strip to remove the copper powder generated in the forming female die (3).

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