Environment-friendly solid welding wire production process

Abstract

The invention relates to an environment-friendly solid welding wire production process which integrates multiple procedures of paying off, mechanical husking, abrasive belt dephosphorization, wire drawing, mechanical degreasing, electric auxiliary copper plating, electromagnetic drying and layer winding packaging to form an integrated production process. The use of harmful substances in the production process is reduced, so that green production is realized; a plurality of working procedures are synchronously integrated, so that the working procedures of the equipment are integrated, the occupied area is reduced, the production efficiency is stably improved, and the environmental protection concept is implemented.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to an environmentally friendly solid welding wire production process. Background Art

[0002] In traditional technology, the production process for solid welding wire generally includes wire laying, dephosphorization, boronization, wire drawing, alkali washing, pickling, traditional chemical copper plating, traditional drying, manual layer winding and manual packaging processes.

[0003] Based on the above process, the cleaning method used in the production process is mainly electrolytic cleaning, which uses a large amount of chemicals: such as borax, sodium hydroxide, sulfuric acid, etc., which is seriously polluting. And the above-mentioned traditional chemical copper plating method has a relatively low production efficiency. In addition, the traditional copper plating and corresponding drying production equipment occupy a relatively large area and are not highly integrated. Summary of the invention

[0004] The purpose of the present invention is to provide an environmentally friendly solid welding wire production process, which improves the production rate in the solid welding wire production process, avoids the use of harmful substances, and realizes green and efficient production.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: The present invention provides an environmentally friendly solid welding wire production process, comprising the following steps: S1 Pay-off: Use a pay-off stand to pay out the welding wire raw materials; S2 Mechanical Shelling: Send the welding wire raw material after pay-off into a mechanical shelling machine for mechanical shelling, pre-treat the oxide scale on the surface of the welding wire, and straighten the welding wire raw material synchronously; S3 abrasive belt dephosphorization: abrasive belt machine is used to dephosphorize the welding wire raw material after mechanical shelling to remove the surface oxide skin; S4 wire drawing: drawing the dephosphorized welding wire raw material by a die to obtain a welding wire semi-finished product; S5 Mechanical degreasing: washing the semi-finished welding wire after drawing with hot water and high-pressure water in sequence; S6: electro-assisted copper plating: electro-assisted copper plating is performed on the degreased semi-finished welding wire to obtain a finished welding wire; S7 electromagnetic drying: electromagnetically drying the finished welding wire; S8: layer winding and packaging: the finished welding wire after drying is layer wound and packaged.

[0006] Furthermore, in step S1, the pay-off frame is a double-station hydraulic pay-off frame.

[0007] Furthermore, in step S3, the mesh number of the sanding belt is 60 meshes, and the rotation speed of the sanding belt is 1200-2400 r / min.

[0008] In step S4, the die drawing speed is 25-30 m / s, and the average die drawing reduction rate is 24%.

[0009] Furthermore, in step S5, the hot water washing temperature is 80° C., and the high-pressure water washing pressure is 0.25 MPa.

[0010] Further, in step S6, the electroplating solution includes 20-250 g / L sulfuric acid and 30-350 g / L copper sulfate, and the electroplating temperature is 10-70°C.

[0011] Furthermore, in step S6, after the electric-assisted copper plating is completed, the finished welding wire needs to be washed, neutralized and washed twice in sequence.

[0012] Furthermore, the neutralization solution is a sodium carbonate solution, and the pH value of the sodium carbonate solution is 8-10.

[0013] Furthermore, in step S7, the electromagnetic drying temperature is 200-300°C.

[0014] Furthermore, in step S8, the layer winding speed is ≤30 m / s.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: In the process of producing solid welding wire, the present invention uses electric assisted copper plating instead of traditional chemical copper plating, avoids using acid and alkali substances to clean the surface of the welding wire before copper plating, and instead uses hot water and high-pressure water washing to remove grease, thereby realizing green production. At the same time, the boronization process is omitted to avoid the harm of borax. While improving the production rate, green and efficient production is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings: Figure 1 The present invention is a process flow chart of an environmentally friendly solid welding wire production process. DETAILED DESCRIPTION

[0017] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The present invention provides an environmentally friendly solid welding wire production process, see Figure 1 , including wire laying, mechanical shelling, abrasive belt dephosphorization, wire drawing, mechanical degreasing, electric-assisted copper plating, electromagnetic drying and layer winding packaging.

[0019] The above process is further described below by way of examples.

[0020] Example 1 This embodiment provides an environmentally friendly solid welding wire production process, including the following steps: S1 Pay-off: A double-station hydraulic pay-off stand is used to pay-off the welding wire raw material; and the size of the welding wire raw material is Φ6.5mm; S2 Mechanical Shelling: The wire raw material after pay-off is sent to the mechanical shelling machine for mechanical shelling, which serves to pre-treat the oxide scale on the surface of the wire, peel off 70% to 80% of the oxide on the surface of the wire, and straighten the wire at the same time; S3 abrasive belt dephosphorization: the welding wire raw material after mechanical shelling is sent to the abrasive belt machine for mechanical abrasive belt dephosphorization to remove the oxide skin on the surface of the welding wire raw material; the mesh number of the abrasive belt is 60 mesh, and the abrasive belt speed is set at 2400r / min; S4 wire drawing: the dephosphorized welding wire raw material is subjected to die drawing, and the welding wire raw material is drawn into a size of Φ0.78mm~Φ1.57mm through an eye die, and the die drawing speed is controlled at 28m / s, thereby obtaining a welding wire semi-finished product; S5 Mechanical degreasing: After the welding wire is drawn, it is first cleaned with hot water heated by steam (the water temperature is 80°C) to remove the grease lubricant on the surface of the welding wire (because a small amount of lubricant will be applied to the surface of the welding wire during the aforementioned drawing process); then it is cleaned with high-pressure water to remove the impurities remaining on the surface of the welding wire; S6 electric assisted copper plating: the plating solution in the copper plating tank is heated to 60°C by steam, wherein the plating solution includes 50g / L copper sulfate and 25g / L sulfuric acid solution, and the copper ions in the plating solution are reduced to metallic copper atoms through electrode reaction under the action of the external electric field, and metallic copper is deposited on the cathode, so that the copper element is attached to the surface of the welding wire; After copper plating is completed, water is first used to remove a large amount of acidic impurities on the surface of the welding wire; then a sodium carbonate solution with a pH value of 10 is used to neutralize the acidity and impurity ions on the surface of the welding wire; finally, water is used to wash away the impurity ions on the surface of the welding wire, and the washing water generated in this process is recycled to the front-end water washing process for recycling; S7 electromagnetic drying: Use a dryer to heat to 200℃ to dry the residual moisture on the surface of the welding wire; S8 layer winding packaging: the finished welding wire after drying is wound and packaged in layers through a wire take-up machine, and the winding speed is controlled at ≤30m / s; and when packaging, it is necessary to print information including standard number, manufacturer, trademark, specification type, size, batch number, production date, weight, warning instructions, current, re-drying instructions, etc. on the carton.

[0021] In addition, the appearance of the carton should be intact, clean and not damp, the carton seal must be neat and firmly pasted, the shrink film must not be damaged, and the anti-rust paper must be intact. When stacking, welding wires of different brands, specifications, batch numbers and packaging are strictly prohibited from being stacked on the same pallet. The stacking tray should be neat, the film should be firmly wrapped, and the entire pallet of welding wires after wrapping should not be tilted.

[0022] During actual packaging, the servo manual speed is 50%, the servo automatic speed is 60%, the first feeding position is 1435mm, the wire width is 108mm, the material taking position is 298mm, and the extraction position is 115mm. When pasting automatic anti-rust paper, the manual translation speed is 50%, the automatic translation speed is 90%, the translation to the paper extraction position is 456mm, the servo current position is 51mm, the paper extraction completion position is 51mm, and the paper extraction length is 810mm. When sealing the film, the temperature in the film sealing machine furnace is greater than 210℃, and the sealing knife temperature is greater than 170℃.

[0023] Comparative Example 1 The present embodiment provides a traditional solid welding wire production process, including wire laying, mechanical shelling, sanding belt dephosphorization, surface coating (boration), wire drawing, alkali washing, pickling, traditional copper plating, traditional drying, manual layer winding and packaging steps performed in sequence.

[0024] Among them, wire laying, mechanical shelling, abrasive belt dephosphorization, wire drawing, manual layer winding and packaging processes are all conventional technologies and will not be described in detail here.

[0025] For the above-mentioned surface coating boronization process, borax is used for boronization, and the boronization temperature is guaranteed to be above 80 degrees; For the above-mentioned alkaline washing and pickling processes, sodium hydroxide is used for alkaline washing with a concentration of 30% and a dosage of 6 kg / ton; sulfuric acid is used for pickling with a concentration of 35% and a dosage of 8 kg / ton.

[0026] The above-mentioned traditional copper plating process includes multiple processes of alkali washing → air blowing → neutralization washing → air blowing → acid washing → air blowing → activation → air blowing → cold water washing → air blowing → copper plating → air blowing → cold water washing → neutralization washing → cold water washing → hot water washing → high-pressure air blowing → drying.

[0027] Specifically, during alkaline washing, the solution temperature is maintained above 100°C; the electrolysis current is maintained between 1000A and 1500A; and the solution concentration is controlled at 300-400g / L. During acid washing, the electrolysis current is maintained between 1000A and 1500A; and the solution concentration is maintained at 500-650 g / L. During activation acid washing, the solution concentration is controlled at 300-400 g / L.

[0028] When copper plating, the solution temperature is kept above 40℃; the solution concentration is kept at 200~400 g / L; the sulfuric acid concentration in the solution is kept at 150~250 g / L. When neutralizing and washing, the solution pH value is kept at 13~15. The hot water washing temperature is kept above 80 degrees and the pH value is kept at 9~11. When high-pressure air blowing, the air blowing pressure must be kept above 0.6Mpa.

[0029] In the traditional drying process, electric heating and oil furnace heating are used for traditional drying, and the temperature is set above 150°C.

[0030] The present invention conducted performance tests on the above-mentioned Example 1 and Comparative Example 1, and the specific test results are as follows: Tensile strength / MPa Yield strength / MPa Elongation / % Impact absorbed energy / J Example 1 550 445 28 83 Comparative Example 1 565 455 27 84 In the present invention, a shelling machine and a sanding machine are used in sequence to remove phosphorus from the surface of the welding wire, reducing the amount of sulfuric acid used for cleaning by 70%. At the same time, degreasing with a scouring pad and high-pressure water washing are used to directly eliminate the use of sodium hydroxide, reducing the amount of sulfuric acid used by 10%. In addition, electric assisted copper plating is used to improve the copper plating efficiency, and the welding wire production speed is increased from the original 6m / s to 30m / s. During electromagnetic drying, a permanent magnet synchronous motor is used, and the energy consumption is reduced by 15% compared to the traditional three-phase asynchronous motor. The water consumption of the welding wire production line using the new process is only 30% of that of the traditional production line.

[0031] In summary, the environmentally friendly solid welding wire production process disclosed in the present invention realizes green production by reducing the use of harmful substances in the production process; it simultaneously integrates multiple processes to integrate the equipment and processes, reduces the footprint, and achieves a steady improvement in production efficiency.

[0032] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An environmentally friendly solid welding wire production process, characterized in that: The steps include: S1 Pay-off: Use a pay-off stand to pay out the welding wire raw materials; S2 Mechanical Shelling: Send the welding wire raw material after wire laying into a mechanical shelling machine for mechanical shelling, pretreat the oxide scale on the surface of the welding wire, and straighten the welding wire raw material synchronously; S3 abrasive belt dephosphorization: abrasive belt machine is used to dephosphorize the welding wire raw material after mechanical shelling to remove the surface oxide skin; S4 wire drawing: drawing the dephosphorized welding wire raw material by a die to obtain a welding wire semi-finished product; S5 Mechanical degreasing: washing the semi-finished welding wire after drawing with hot water and high-pressure water in sequence; S6: electro-assisted copper plating: electro-assisted copper plating is performed on the degreased semi-finished welding wire to obtain a finished welding wire; S7 electromagnetic drying: electromagnetically drying the finished welding wire; S8: layer winding and packaging: the finished welding wire after drying is layer wound and packaged.

2. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S1, the pay-off frame is a double-station hydraulic pay-off frame.

3. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S3, the mesh number of the sanding belt is 60 meshes, and the rotation speed of the sanding belt is 1200-2400 r / min.

4. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S4, the die drawing speed is 25-30 m / s, and the average die drawing reduction rate is 24%.

5. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S5, the hot water washing temperature is 80°C, and the high-pressure water washing pressure is 0.25 MPa.

6. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S6, the electroplating solution includes 20-250 g / L sulfuric acid and 30-350 g / L copper sulfate, and the electroplating temperature is 10-70°C.

7. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S6, after the electric-assisted copper plating is completed, the finished welding wire needs to be washed, neutralized and washed twice in sequence.

8. The environmentally friendly solid welding wire production process according to claim 7, characterized in that: The neutralization solution is a sodium carbonate solution, and the pH value of the sodium carbonate solution is 8-10.

9. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S7, the electromagnetic drying temperature is 200-300°C.

10. The environmentally friendly solid welding wire production process according to claim 1, characterized in that: In step S8, the layer winding speed is ≤30 m / s.

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