A girth welding device with a hydraulic support oil cylinder machining surface spraying pretreatment function

Abstract

The utility model provides a kind of ring slit welding equipment with the function of hydraulic support oil cylinder processing surface spraying pretreatment, including ring slit welder and laser, the ring slit welder is mainly composed of machine tool, spindle chuck, center rest, tailstock, portal frame and welding torch assembly, the spindle chuck is arranged at the front end of the machine tool, the center rest and the tailstock are arranged on the machine tool, the portal frame is arranged on the left side or right side of the machine tool, the welding torch assembly moves on the top beam of the portal frame by first linear drive mechanism, the laser moves on the top beam of the portal frame by second linear drive mechanism, the emission port of the laser is towards the same axis where the spindle chuck, the center rest and the tailstock are located.The utility model replaces existing hydraulic support oil cylinder processing surface spraying pretreatment process by laser treatment, integrates laser treatment to ring slit welding process, shortens oil cylinder processing technological process, improves production efficiency, quality is stable, cost is low, green and environmental protection.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic support cylinder processing equipment, specifically, to a circumferential welded equipment with a pre-treatment function for spraying the processing surface of a hydraulic support cylinder. Background Technology

[0002] Hydraulic support cylinders operate in environments with low acidity, high humidity, or high salinity for extended periods. These harsh conditions place high demands on the quality of the paint applied to their surfaces. The main factors affecting paint adhesion on the outer diameter of the cylinder are the surface roughness of the cylinder body and the quality of pretreatment oil removal. The cylinder body is made of alloy steel and is primarily welded from the cylinder bottom (9) and cylinder barrel (8). The outer diameter is divided into: the cylinder bottom surface (10), the circumferential weld (11), the shot-blasted surface (12), and the machined surface (13). See [link / details]. Figure 1 Among them, the surface roughness Ra of shot-blasted surface 12 is ≥120, and the surface finish can reach Sa2.5. After spraying, the paint adhesion and corrosion resistance are good, and quality problems are basically not caused. However, the surface roughness Ra of machined surface 13 is ≤1.6. During machining, machined surface 13 is covered with cutting fluid, and after pretreatment, it is primed. In actual use in the well, machined surface 13 often suffers from paint peeling and rust. There are two reasons for this: first, the surface roughness is low, and second, the oil stains are not completely removed during pretreatment.

[0003] The current hydraulic cylinder manufacturing process is as follows: material preparation - shot blasting - primer spraying - machining - circumferential welding - weld cavity - pretreatment of the machined surface - primer application to the machined surface - assembly - degreasing - cleaning - topcoat spraying. The existing pretreatment steps for the machined surface are: degreasing - cleaning - phosphating.

[0004] The disadvantages of existing pretreatment technologies for machining are:

[0005] (1) The process flow is long, which affects production efficiency.

[0006] (2) Phosphating process is not environmentally friendly and is harmful to human health, and cannot meet the requirements of environmental protection and clean production.

[0007] (3) Degreasing agents and phosphating agents are consumables, which occupy inventory and workshop space.

[0008] (4) The quality of degreasing is unstable. Utility Model Content

[0009] The purpose of this invention is to address the shortcomings of existing technologies by providing a circumferential welding equipment with a pre-treatment function for the processing surface of hydraulic support cylinders. This invention can replace the existing pre-treatment process for the processing surface of hydraulic support cylinders with laser treatment, integrating laser treatment into the circumferential welding process, shortening the cylinder processing flow, improving production efficiency, ensuring stable quality, low cost, zero pollution, and environmental friendliness.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: a circumferential weldment equipment with a hydraulic support cylinder for pre-treatment of the machined surface before spraying, comprising a circumferential welder and a laser. The circumferential welder mainly consists of a machine tool, a spindle chuck, a center frame, a tailstock, a gantry, and a welding torch assembly. The spindle chuck is located at the front end of the machine tool. The center frame and the tailstock are spaced apart on the machine tool and can be adjusted in the front-back direction. The spindle chuck, the center frame, and the tailstock are on the same axis, with the center frame located between the spindle chuck and the tailstock. The gantry is located on the left or right side of the machine tool in the front-back direction. The welding torch assembly moves on the top beam of the gantry via a first linear drive mechanism. The laser moves on the top beam of the gantry via a second linear drive mechanism. The laser is located on the front side of the welding torch assembly, and the laser's emission port faces the same axis on which the spindle chuck, the center frame, and the tailstock are located.

[0011] Based on the above, the laser processing parameters of the laser are: power 3000W, pulse frequency 2000Hz, scanning frequency 30Hz, wavelength 1080±10nm, and focusing distance 400±50mm.

[0012] Based on the above, the first linear drive mechanism is a linear motor type linear module or an electric hoist.

[0013] Based on the above, the second linear drive mechanism is a linear motor type linear module or an electric hoist.

[0014] This utility model has substantial features and progress compared with the prior art. Specifically, this utility model integrates a laser into a circumferential weld equipment. During the circumferential weld process between the bottom of the outer cylinder and the cylinder barrel of the hydraulic support cylinder, the laser is used to burn and explode the oil stains. The laser emits a laser beam onto the outer circle of the cylinder barrel, which can clean the oil stains on the outer circle of the cylinder barrel.

[0015] When the laser emits a laser beam onto the outer cylindrical machining surface of the cylinder, the laser ablation of the machining surface substrate can form laser etching on the machining surface, increasing the surface roughness of the machining surface and increasing the contact area between the machining surface and the paint, thereby ensuring the adhesion of the paint on the cylinder machining surface and realizing the pretreatment of the machining surface.

[0016] Thus, this utility model replaces the existing pretreatment steps of degreasing, cleaning, and phosphating with laser treatment, and integrates laser treatment into the circumferential welding process. During the circumferential weld, the outer cylinder rotates, and the laser irradiates the processing surface, achieving the purpose of degreasing and improving the surface roughness of the processing surface. It does not occupy the space used by the original process, and does not require additional staff. The hydraulic cylinder processing technology is changed to: material feeding - shot blasting - primer spraying - processing - circumferential welding, laser treatment - weld cavity - primer application to the processing surface - assembly - cleaning - topcoat spraying. This shortens the hydraulic support cylinder processing process and improves production efficiency. The automated operation enables unmanned operation, reduces personnel management, ensures stable quality, and has low cost. Moreover, the laser treatment process is pollution-free, making it a green and environmentally friendly pretreatment method for processing. Compared with existing pretreatment technologies, it eliminates the phosphating operation, avoiding environmental pollution and harm to human health.

[0017] In summary, compared with the prior art, this utility model replaces the pretreatment process of spraying the machining surface of the hydraulic support cylinder with laser processing, and integrates laser processing into the circumferential welding process. This can shorten the cylinder machining process, improve production efficiency, ensure stable quality, reduce costs, and be environmentally friendly. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the hydraulic cylinder body.

[0019] Figure 2 This is a schematic diagram of the cylinder body structure during the circumferential welding process.

[0020] Figure 3 This is a schematic diagram of the structure of this utility model.

[0021] In the diagram: 1. Machine tool; 2. Spindle chuck; 3. Center rest; 4. Tailstock; 5. Gantry; 6. Welding torch assembly; 7. Laser; 8. Cylinder barrel; 9. Cylinder bottom; 10. Cylinder bottom surface; 11. Circumferential weld; 12. Shot blasting surface; 13. Machined surface. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0023] like Figure 3As shown, a circumferential welder with a hydraulic support cylinder and pre-treatment function for surface spraying includes a circumferential welder (existing technology) and a laser 7. The circumferential welder mainly consists of a machine tool 1, a spindle chuck 2, a center rest 3, a tailstock 4, a gantry frame 5, and a welding torch assembly 6. The spindle chuck 2 is located at the front end of the machine tool 1 (the spindle chuck 2 is driven to rotate by a spindle motor, which is conventional technology). The center rest 3 and the tailstock 4 are spaced apart on the machine tool 1 and their positions can be adjusted in the front-rear direction. The spindle chuck 2, the center rest 3, the tailstock 4, the gantry frame 5, and the welding torch assembly 6 are all mounted on the machine tool 1. The center frame 3 and the tailstock 4 are on the same axis, and the center frame 3 is located between the spindle chuck 2 and the tailstock 4. The gantry 5 is arranged on one side of the machine tool 1 in the front-rear direction. The welding torch assembly 6 moves on the top beam of the gantry 5 through a first linear drive mechanism. The laser 7 moves on the top beam of the gantry 5 through a second linear drive mechanism. The laser 7 is arranged in front of the welding torch assembly 6, and the emission port of the laser 7 faces the same axis where the spindle chuck 2, the center frame 3 and the tailstock 4 are located.

[0024] The laser processing parameters of the laser 7 are: power 3000W, pulse frequency 2000Hz, scanning frequency 30Hz, wavelength 1080±10nm, and focusing distance 400±50mm.

[0025] The first linear drive mechanism is a linear motor type linear module or an electric hoist. In other embodiments, a screw drive mechanism or other mechanism that can achieve linear drive can also be used to adjust the position of the welding torch assembly 6 to adapt to different specifications of oil cylinders.

[0026] The second linear drive mechanism is a linear motor type linear module or an electric hoist. In other embodiments, a screw drive mechanism or other mechanism that can achieve linear drive can also be used to adjust the position of the laser 7 to adapt to different specifications of hydraulic cylinders.

[0027] In the specific operation of this embodiment, as follows: Figure 3 As shown, the cylinder barrel 8 and cylinder bottom 9 are placed on the circumferential welder, so that the tailstock 4 is pressed against the cylinder bottom 9 onto the cylinder barrel 8. At this time, the cylinder body structure formed by the cylinder bottom 9 and cylinder barrel 8 is as follows. Figure 2As shown, the spindle chuck 2 clamps the cylinder bore of the cylinder 8, and the center frame 3 supports the outer circle of the cylinder 8. During the welding of the circumferential weld 11, the first linear drive mechanism can move the welding torch assembly 6 to the weld seam, while the second linear drive mechanism can move the laser 7 to an oblique position above the outer circle machining surface 13 of the cylinder 8, aligning the laser 7's emission port with the outer circle machining surface 13 of the cylinder 8. The spindle chuck 2 drives the cylinder 8 to rotate on the center frame 3, and the cylinder bottom 9 also rotates together. The welding torch assembly 6 then welds the weld seam. Simultaneously, the laser 7 is activated, automatically adjusting the focusing distance, and emits a laser beam onto the outer circle machining surface 13 of the cylinder 8. During the rotation of the cylinder 8, the laser processes the outer circle machining surface 13, removing oil stains and simultaneously ablating the substrate of the machining surface 13, forming laser etching on the machining surface 13, increasing the surface roughness of the machining surface 13, and increasing the contact area between the machining surface 13 and the paint, thereby ensuring the adhesion of the paint on the cylinder machining surface 13. During the entire welding process of the circumferential weld 11, the main spindle chuck 2 drives the cylinder 8 and cylinder bottom 9 to rotate 2 revolutions, so that the laser processes the outer circle machining surface 13 of the cylinder 8 twice.

[0028] Thus, this invention integrates the laser 7 into the circumferential welding equipment. During the welding process of the circumferential weld 11 between the outer cylinder bottom 9 and the cylinder barrel 8 of the hydraulic support cylinder, the laser 7 emits a laser beam onto the outer circular machining surface 13 of the cylinder barrel 8, removing oil and forming laser etching on the machining surface 13, achieving the purpose of degreasing and improving surface roughness, thereby realizing the pretreatment of the machining surface 13. This invention uses laser treatment to replace the existing pretreatment process of spraying the machining surface of the hydraulic support cylinder: degreasing-cleaning-phosphating, and integrates laser treatment into the circumferential welding process. It does not occupy the space used by the original process, does not require additional staff, and changes the cylinder processing process to: blanking-shot blasting-primer spraying-machining-circumferential welding + laser treatment-welding the cavity-machining surface primer touch-up-assembly-cleaning-topcoat spraying, shortening the cylinder processing process and improving production efficiency.

[0029] This invention enables automated operation, achieving unmanned operation, reducing personnel management, ensuring stable quality, and lower costs. Furthermore, the laser processing process is pollution-free, making it a green and environmentally friendly pretreatment method. Compared with existing pretreatment technologies, it eliminates the phosphating process, avoiding environmental pollution and harm to human health.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A circumferential welder with a hydraulic support cylinder and pre-treatment function for surface spraying, comprising a circumferential welder, the circumferential welder mainly consisting of a machine tool, a spindle chuck, a center rest, a tailstock, a gantry, and a welding torch assembly. The spindle chuck is located at the front end of the machine tool. The center rest and the tailstock are spaced apart on the machine tool and can be adjusted in the front-rear direction. The spindle chuck, the center rest, and the tailstock are on the same axis, with the center rest located between the spindle chuck and the tailstock. The gantry is located on the left or right side of the machine tool in the front-rear direction. The welding torch assembly moves on the top beam of the gantry via a first linear drive mechanism. The welding torch assembly is characterized by: It also includes a laser, which moves on the top beam of the gantry via a second linear drive mechanism. The laser is positioned in front of the welding torch assembly, and its emission port faces the same axis as the spindle chuck, the center frame, and the tailstock.

2. The circumferential weldment equipment with hydraulic support cylinder machining surface pretreatment function according to claim 1, characterized in that: The laser processing parameters of the laser are: power 3000W, pulse frequency 2000Hz, scanning frequency 30Hz, wavelength 1080±10nm, and focusing distance 400±50mm.

3. The circumferential weldment equipment with hydraulic support cylinder machining surface pretreatment function according to claim 1 or 2, characterized in that: The first linear drive mechanism is a linear motor type linear module or an electric hoist.

4. The circumferential weldment equipment with hydraulic support cylinder machining surface pretreatment function according to claim 1 or 2, characterized in that: The second linear drive mechanism is a linear motor type linear module or an electric hoist.

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