Beam butt weld seam no over-weld hole welding process and welding slag polishing equipment

Abstract

The application discloses a kind of beam butt joint weld hole-free welding processes, it is related to welding method and welding equipment technical field, including the end of H beam one and H beam two is handled, first groove, strip hole, second groove are set, to butt joint welding, to the second groove welding, to the first groove welding and through welding slag polishing equipment to the step of polishing welding slag.Welding slag polishing equipment includes 2 C-shaped polishing frame, vertical shaft, top plate, bottom plate, swing motor, pulley structure, locking mechanism being oppositely arranged.The welding process of the application does not need to set welding hole in the web of H beam, has strong versatility, simple construction, improves the efficiency of welding, saves artificial time, is convenient for welding quality control, and greatly improves the welding quality.After welding, for the welding slag of difficult polishing position, using the welding slag polishing equipment of the application, welding slag polishing work can be easily completed, and the polishing quality can be guaranteed, the efficiency of welding slag polishing is effectively improved, and the polishing difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the field of welding methods and welding equipment, specifically to a welding process for butt welds of beams without through-holes and equipment for grinding weld slag. Background Technology

[0002] In the construction of conventional offshore platforms, to ensure easy welding of flange butt joints and improve welding quality, existing technology uses weld holes based on AWSD1.1 (Welding Standard Structure). The height of the weld hole is the greater of the web thickness or 20mm, the overall width of the weld hole is not less than three times the web thickness, and the radius of the weld hole must be ground smooth. To ensure that the weld hole is free of cracks and other defects, it needs to be subjected to magnetic particle testing. As mentioned above, the weld hole process is cumbersome and inefficient. Therefore, it is necessary to develop a process for butt welding of H-beams on conventional offshore platforms that does not require weld holes. In addition, after the H-beam butt welding, the weld slag on the inner surfaces of the upper and lower flange plates and the outer surface of the web plate needs to be ground. Existing technology uses ordinary grinding tools, which, due to the special nature of the grinding location, also suffers from cumbersome operation and low construction efficiency. Summary of the Invention

[0003] To address the problems of existing technologies, this invention provides a welding process for butt welds of beams without through-holes and a slag grinding device. The welding process of this invention eliminates the need for through-holes in the web of the H-beam, offering strong versatility, simple construction, improved welding efficiency, reduced labor time, easier quality control, and significantly enhanced weld quality. After welding, the slag grinding device of this invention can easily remove slag from difficult-to-grind areas while ensuring grinding quality.

[0004] To solve the above problems, the technical solution of the present invention is as follows:

[0005] A welding process for butt welds of beams without through-holes, the welding process being for the butt joint of H-beam 1 and H-beam 2, includes the following steps:

[0006] Step 1: Process the ends of H-beam 1 and H-beam 2 so that the web of one end of H-beam 1 protrudes outward to form a protruding part, and the web of one end of H-beam 2 is recessed inward to form a recessed part. The protruding part and the recessed part cooperate with each other to form a docking structure.

[0007] Step 2: Make strip-shaped holes at the upper and lower ends of the web of H-beam 1, at the positions where the upper flange plate and the lower flange plate are located, and make a first bevel at the lower end of the strip-shaped holes; make a second bevel at the end of the upper flange plate or the lower flange plate corresponding to the first bevel, and the second bevel is a double bevel.

[0008] Step 3: Align the ends of H-beam 1 and H-beam 2 and insert the protrusion into the recess. After aligning the web ends of H-beam 1 and H-beam 2, align the end of the upper flange of H-beam 1 with the end of the lower flange of H-beam 2.

[0009] Step 4: Weld the butt joint of the protrusion and the recess; after welding, weld the outer welds of the two second bevels; after the outer welds are welded, gouge and grind the inner welds; after grinding, weld the inner welds; after welding, perform non-destructive testing on the welded parts.

[0010] Step 5: After the non-destructive testing is completed and found to be correct, perform full penetration welding on the strip hole and the first bevel;

[0011] Step 6: After all welding is completed, use ordinary tools to grind the weld beads on the outer surface of the upper and lower flange plates, and use a slag grinding device to grind the weld beads on the inner surface of the upper and lower flange plates, as well as the weld beads of the web butt joints in the protrusions and depressions.

[0012] Preferably, in step 2, the strip hole is a rectangular hole, and the maximum height of the rectangular hole does not exceed 5mm.

[0013] Preferably, in step 2, the first bevel is a single-sided bevel or a double-sided bevel.

[0014] Preferably, in step 6, the slag grinding equipment includes two C-shaped grinding frames arranged opposite each other, a vertical shaft, a top plate, a bottom plate, a rocking motor, a pulley structure, and a locking mechanism. Each of the two free ends of the C-shaped grinding frames has a through hole, and the sidewall of the through hole has a limiting groove. The vertical shaft passes through the through hole, and the outer wall of the vertical shaft has a limiting ridge that cooperates with the limiting groove. Both ends of the vertical shaft are rotatably connected to the top plate and the bottom plate, respectively. The inner surfaces of the top plate and the bottom plate are respectively connected to the upper flange plate of the welded H-beam. The lower surfaces of the lower flange plates abut each other. The top plate and bottom plate are tightened by a locking mechanism and fixed to the H-beam. The top of the vertical shaft passes through the top plate. One of the vertical shafts is fixedly connected to the output shaft of a swing motor pre-installed on the top plate. The two vertical shafts are connected by a pulley structure and rotate back and forth under the drive of the swing motor. The size of the C-shaped grinding frame matches the size of the H-beam. During the swing, the weld surfaces of the inner surfaces of the upper and lower flange plates or the weld surfaces of the web butt joints of the protrusions and depressions are ground.

[0015] Preferably, in step 6, the pulley structure includes: a driving pulley located at the top of a vertical shaft connected to the rocking motor, and a driven pulley located at the top of another vertical shaft. The driving pulley and the driven pulley are connected by a transmission belt. The rocking motor is electrically connected to a power source via a wire. A protective cover is detachably and fixedly connected to the upper surface of the top plate. The top of the rocking motor, the driving pulley, the driven pulley, and the two vertical shafts are all located inside the protective cover. A control panel is provided on the outer surface of the protective cover, and the control panel is provided with a rocking motor control button.

[0016] Preferably, in step 6, the base plate is provided with a sliding hole for passing through the bottom end of the vertical shaft, and the outer surface of the bottom end of the vertical shaft is clearance-fitted with the inner surface of the sliding hole.

[0017] Preferably, in step 6, the locking mechanism includes four internally threaded sleeves arranged in a rectangular shape on the lower surface of the top plate. The top end of each sleeve is fixedly connected to the lower surface of the top plate. The bottom plate has a through hole opposite to the sleeve, and a screw rod passes through the through hole. The screw rod is screwed to the sleeve. Tightening the screw rod achieves the pressing of the top plate and bottom plate with the upper and lower flange plates.

[0018] Preferably, step 6 includes the following specific steps:

[0019] (1) Select a suitable C-shaped grinding frame according to the size of the H-beam, insert two C-shaped grinding frames into both sides of the H-beam, insert two vertical shafts, and align the axis of the vertical shafts with the welds on the inner surfaces of the upper and lower flanges or the welds on the web butt joints of the protrusions and recesses.

[0020] (2) Insert the bottom plate into the bottom of the two vertical shafts. After inserting the bottom plate, pass the screw through the through hole and lock it with the sleeve. At this time, the top plate and the bottom plate are pressed against the outer surface of the upper and lower flange plates of the H beam, respectively.

[0021] (3) Connect the power supply and start the swing motor control button. The two C-shaped grinding frames swing repeatedly to grind the weld surface of the inner surface of the upper and lower flange plates or the weld surface of the web butt joint of the protrusion and the depression.

[0022] (4) After grinding for a certain period of time, turn off the swing motor, remove the equipment, and clean away the welding slag that has been ground.

[0023] The present invention provides a welding process for butt welds of beams without through-holes and a slag grinding device, which has the following beneficial effects:

[0024] The welding process of this invention eliminates the need for weld holes in the web of the H-beam, offering strong versatility, simple construction, improved welding efficiency, reduced labor time, easier welding quality control, and significantly enhanced welding quality. After welding, the welding slag grinding equipment of this invention can easily remove weld slag from hard-to-grind areas, ensuring grinding quality, effectively improving grinding efficiency, and reducing grinding difficulty. Attached Figure Description

[0025] Figure 1 A schematic diagram of the welding process of this invention;

[0026] Figure 2 A cross-sectional view of the first bevel in direction A of the present invention, which is a single-sided bevel;

[0027] Figure 3 A cross-sectional view of the first bevel in direction A of the present invention, which is a double-sided bevel;

[0028] Figure 4 A cross-sectional view of the grinding equipment of the present invention during operation;

[0029] Figure 5 A side view of the grinding equipment of the present invention during operation;

[0030] Figure 6 A top view of the C-shaped grinding frame in the grinding equipment of the present invention;

[0031] 01. Upper flange plate; 02. Lower flange plate; 03. Web plate; 1. Location of the first bevel; 2. Single-sided bevel; 3. Double-sided bevel; 4. Second bevel; 5. Butt joint; 6. Strip hole; 7. C-shaped grinding frame; 8. Top plate; 9. Bottom plate; 10. Screw; 11. Sleeve; 12. Vertical shaft; 13. Limiting ridge; 14. Protective cover; 15. Swing motor; 16. Driving pulley; 17. Driven pulley; 18. Transmission belt; 19. Control panel; 20. Through hole; 21. Limiting groove. Detailed Implementation

[0032] The following description provides a detailed explanation of the embodiments of the present invention in a step-by-step manner. This description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limiting this invention.

[0034] Example 1, such as Figure 1-6 As shown:

[0035] A welding process for butt welds of beams without through-holes, the welding process being for the butt joint of H-beam 1 and H-beam 2, includes the following steps:

[0036] Step 1: Process the ends of H-beam 1 and H-beam 2, so that one end of the web of H-beam 1 protrudes outward to form a protruding part, and one end of the web of H-beam 2 is recessed inward to form a recessed part. The protruding part and the recessed part cooperate to form a mating structure, such as... Figure 1 As shown, the implementation method is to make appropriate cuts to the upper and lower flange plates of H-beam one and to make appropriate cuts to the web plate of H-beam two.

[0037] Step 2: A strip-shaped hole 6 is made at the upper and lower ends of the web 03 of H-beam 1, located at the ends of the upper flange plate 01 and the lower flange plate 02. A first bevel is made at the lower end of the strip-shaped hole 6. A second bevel 4 is made at the end of the upper flange plate 01 or the lower flange plate 02 corresponding to the first bevel. The second bevel 4 is a double-sided bevel. Figure 1 As shown, the location 1 where the first bevel is opened is illustrated;

[0038] Step 3: Align the ends of H-beam 1 and H-beam 2 and insert the protrusion into the recess. After aligning the web ends of H-beam 1 and H-beam 2, align the end of the upper flange of H-beam 1 with the end of the lower flange of H-beam 2.

[0039] Step 4: Weld the butt joint 5 of the protrusion and the recess; after welding, weld the outer welds of the two second bevels 4 (not shown in the figure, and the welds formed by the outer bevels in the double bevels); after the outer welds are welded, gouge and grind the inner welds; after grinding, weld the inner welds; after welding, perform non-destructive testing on the welded parts.

[0040] Step 5: After the non-destructive testing is completed and found to be correct, perform full penetration welding on the strip hole and the first bevel;

[0041] Step 6: After all welding is completed, use ordinary tools to grind the welds on the outer surface of the upper and lower flange plates, and use a slag grinding device to grind the welds on the inner surface of the upper and lower flange plates, as well as the welds on the web butt joints 5 of the protrusions and depressions.

[0042] In step 2, the strip hole is a rectangular hole, and the maximum height of the rectangular hole is no more than 5mm, which meets the requirements for welding the lower side weld bead of the second bevel 4.

[0043] In step 2, as described above, Figure 2 As shown, the first bevel can be either a single-sided bevel (2) or a double-sided bevel (3). The choice between a single-sided or double-sided bevel depends on the process requirements.

[0044] Example 2, as follows Figure 4-6 As shown:

[0045] Based on Example 1, this example discloses:

[0046] In step 6, the slag grinding equipment includes two C-shaped grinding frames 7 arranged opposite each other, a vertical shaft 12, a top plate 8, a bottom plate 9, a swing motor 15, a pulley structure, and a locking mechanism. Each of the two free ends of the C-shaped grinding frame 7 has a through hole 20. The side wall of the through hole 20 has a limiting groove 21. The vertical shaft 12 passes through the through hole 20. The outer wall of the vertical shaft 12 has a limiting rib 13 that cooperates with the limiting groove 21. The two ends of the vertical shaft 12 are rotatably connected to the top plate 8 and the bottom plate 9, respectively. The inner surfaces of the top plate 8 and the bottom plate 9 are respectively connected to the upper flange of the welded H-beam (i.e., the combination of H-beam one and H-beam two). The upper surface of plate 01 and the lower surface of lower flange plate 02 abut against each other. The top plate 8 and bottom plate 9 are tightened by a locking mechanism and fixed to the H beam. The top end of the vertical shaft 12 passes through the top plate 8. The top end of one vertical shaft is fixedly connected to the output shaft of the swing motor 15 preset on the top plate 8. The two vertical shafts 12 are connected by a pulley structure and rotate back and forth under the drive of the swing motor. The size of the C-shaped grinding frame 7 matches the size of the H beam. During the swing, the weld surface of the inner surface of the upper and lower flange plates (i.e., the weld surface on the lower side of the second bevel 4) or the weld surface of the web butt joint 5 of the protrusion and the depression is ground.

[0047] In step 6, the pulley structure includes: a driving pulley 16 located at the top of the vertical shaft 12 connected to the rocking motor 15, and a driven pulley 17 located at the top of the other vertical shaft 12. The driving pulley 16 and the driven pulley 17 are connected by a transmission belt 18. The rocking motor 15 is electrically connected to a power source via a wire. A protective cover 14 is detachably and fixedly connected to the upper surface of the top plate 8. The tops of the rocking motor 15, the driving pulley 16, the driven pulley 17, and the two vertical shafts 12 are all located inside the protective cover 14. A control panel 19 is provided on the outer surface of the protective cover 14, and the control panel 19 is provided with rocking motor control buttons.

[0048] In step 6, the base plate 9 is provided with a sliding hole for passing through the bottom end of the vertical shaft 12, and the outer surface of the bottom end of the vertical shaft 12 is clearance-fitted with the inner surface of the sliding hole.

[0049] In step 6, the locking mechanism includes four internally threaded sleeves 11 arranged in a rectangular shape on the lower surface of the top plate 8. The top end of each sleeve 11 is fixedly connected to the lower surface of the top plate 8. The bottom plate 9 has a through hole opposite to the sleeve 11, and a screw 10 passes through the through hole. The screw 10 is screwed to the sleeve 11. Tightening the screw achieves the pressing of the top plate 8 and the bottom plate 9 against the upper and lower flanges.

[0050] Example 3, such as Figure 1-6 As shown:

[0051] Based on Example 2, this example discloses:

[0052] Step 6 includes the following specific steps:

[0053] (1) Select a suitable C-shaped grinding frame 7 according to the size of the H beam, insert two C-shaped grinding frames 7 into both sides of the H beam, insert two vertical shafts, and align the axis of the vertical shafts with the welds of the inner surfaces of the upper and lower flanges or the welds of the web butt joints 5 of the protrusions and recesses, so that the C-shaped grinding frames can achieve the grinding effect while the vertical shafts are rotating.

[0054] (2) Insert the bottom plate 9 into the bottom of the two vertical shafts 12. After inserting the bottom plate 9, insert the screw 10 through the through hole and lock it with the sleeve 11. At this time, the top plate 8 and the bottom plate 9 are pressed against the outer surfaces of the upper and lower flanges of the H beam, respectively.

[0055] (3) Connect the power supply and start the swing motor control button. The two C-shaped grinding frames 7 swing repeatedly to grind the weld surface of the inner surface of the upper and lower flange plates or the weld surface of the web butt joint of the protrusion and the depression.

[0056] (4) After grinding for a certain period of time, turn off the swing motor, remove the equipment, and clean away the welding slag that has been ground.

Claims

1. A welding process for butt welds of beams without through-holes, characterized in that: The welding process described above refers to the butt joint of H-beam 1 and H-beam 2, and includes the following steps: Step 1: Process the ends of H-beam 1 and H-beam 2 so that the web of one end of H-beam 1 protrudes outward to form a protruding part, and the web of one end of H-beam 2 is recessed inward to form a recessed part. The protruding part and the recessed part cooperate with each other to form a docking structure. Step 2: Make strip-shaped holes at the upper and lower ends of the web of H-beam 1, at the positions where the upper flange plate and the lower flange plate are located, and make a first bevel at the lower end of the strip-shaped holes; make a second bevel at the end of the upper flange plate or the lower flange plate corresponding to the first bevel, and the second bevel is a double bevel. Step 3: Align the ends of H-beam 1 and H-beam 2 and insert the protrusion into the recess. After aligning the web ends of H-beam 1 and H-beam 2, align the end of the upper flange of H-beam 1 with the end of the lower flange of H-beam 2. Step 4: Weld the butt joint of the protrusion and the recess; after welding, weld the outer welds of the two second bevels; after the outer welds are welded, gouge and grind the inner welds; after grinding, weld the inner welds; after welding, perform non-destructive testing on the welded parts. Step 5: After the non-destructive testing is completed and found to be correct, perform full penetration welding on the strip hole and the first bevel; Step 6: After all welding is completed, use ordinary tools to grind the welds on the outer surface of the upper and lower flange plates, and use a slag grinding device to grind the welds on the inner surface of the upper and lower flange plates, as well as the welds on the web butt joints of the protrusions and recesses. In step 6, the welding slag grinding equipment includes two C-shaped grinding frames arranged opposite each other, a vertical shaft, a top plate, a bottom plate, a swing motor, a pulley structure, and a locking mechanism. The two free ends of the C-shaped grinding frames are respectively provided with through holes, and the side walls of the through holes are provided with limiting grooves. The vertical shaft passes through the through holes. The outer wall of the vertical shaft is provided with a limiting ridge that works in conjunction with the limiting groove. The two ends of the vertical shaft are rotatably connected to the top plate and the bottom plate, respectively. The inner surfaces of the top plate and the bottom plate abut against the upper surface of the upper flange plate and the lower surface of the lower flange plate of the welded H-beam, respectively. The top plate and bottom plate are tightened together by a locking mechanism and fixed to the H-beam. The top of the vertical shaft passes through the top plate. One of the vertical shafts is fixedly connected to the output shaft of the swing motor pre-installed on the top plate. The two vertical shafts are connected by a pulley structure and rotate back and forth under the drive of the swing motor. The dimensions of the C-shaped grinding frame are matched with the dimensions of the H-beam, and the grinding is performed on the weld surfaces of the inner surfaces of the upper and lower flange plates or the weld surfaces of the web butt joints of the protrusions and depressions during the swinging motion.

2. The welding process for butt welds of beams without through-holes as described in claim 1, characterized in that: In step 2, the strip hole is a rectangular hole, and the maximum height of the rectangular hole is no more than 5mm.

3. The welding process for butt welds of beams without through-holes as described in claim 1, characterized in that: In step 2, the first bevel is either a single-sided bevel or a double-sided bevel.

4. The welding process for butt welds of beams without through-holes as described in claim 1, characterized in that: In step 6, the pulley structure includes: a driving pulley located at the top of the vertical shaft connected to the rocking motor, and a driven pulley located at the top of another vertical shaft. The driving pulley and the driven pulley are connected by a transmission belt, the swing motor is electrically connected to the power supply through a wire, and a protective cover can be detachably and fixedly connected to the upper surface of the top plate. The tops of the swing motor, the driving pulley, the driven pulley, and the two vertical shafts are all located inside the protective cover. The outer surface of the protective cover is equipped with a control panel, which has a swing motor control button.

5. The welding process for butt welds of beams without through-holes as described in claim 4, characterized in that: In step 6, the base plate is provided with a sliding hole for passing through the bottom end of the vertical shaft, and the outer surface of the bottom end of the vertical shaft is clearance-fitted with the inner surface of the sliding hole.

6. The welding process for butt welds of beams without through-holes as described in claim 5, characterized in that: In step 6, the locking mechanism includes four sleeves with internal threads arranged in a rectangular shape on the lower surface of the top plate. The top end of the sleeve is fixedly connected to the lower surface of the top plate. The bottom plate is provided with a through hole opposite to the sleeve. A screw rod passes through the through hole and is screwed to the sleeve. Tightening the screw rod achieves the pressing of the top plate and bottom plate with the upper and lower flange plates.

7. The welding process for butt welds of beams without through-holes as described in claim 6, characterized in that: Step 6 includes the following specific steps: (1) Select a suitable C-shaped grinding frame according to the size of the H-beam, insert two C-shaped grinding frames into both sides of the H-beam, insert two vertical shafts, and align the axis of the vertical shafts with the welds on the inner surfaces of the upper and lower flanges or the welds on the web butt joints of the protrusions and recesses. (2) Insert the bottom plate into the bottom of the two vertical shafts. After inserting the bottom plate, pass the screw through the through hole and lock it with the sleeve. At this time, the top plate and the bottom plate are pressed against the outer surface of the upper and lower flange plates of the H beam, respectively. (3) Connect the power supply and start the swing motor control button. The two C-shaped grinding frames swing repeatedly to grind the weld surface of the inner surface of the upper and lower flange plates or the weld surface of the web butt joint of the protrusion and the depression. (4) After grinding for a certain period of time, turn off the swing motor, remove the equipment, and clean off the welding slag that has been ground.

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