Welding method suitable for narrow position

Abstract

The invention provides a welding method suitable for a narrow part, and relates to the technical field of building construction welding, and the welding method comprises the following steps: cleaning a welding part on the surface of a workpiece to ensure that the surface of the workpiece is clean and dirt-free; corresponding welding current and voltage are selected according to the welding material and thickness, and parameters of the electric welding machine are adjusted according to the selected current and voltage; cutting off the welding rod to a required length by using a processing clamp, and removing a coating on the surface of the welding rod by using the processing clamp to expose a core wire; cleaning the surface of the core wire to ensure that the surface of the core wire is clean and dirt-free; one end of a welding angle adjusting rod is connected with the welding gun, and the other end is connected with the core wire; and after the welding angle is adjusted through the welding angle adjusting rod, the narrow position of the workpiece is welded, and the angle of the processed welding rod is adjusted through the welding angle adjusting rod when the narrow position is welded so that the workpiece in the narrow position of the operation space can be welded. The problem that in the existing welding process, operation is difficult to conduct in the narrow position is effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction welding, and in particular to a welding method suitable for narrow places. Background Art

[0002] In the vast field of construction, electric welders, as important construction tools, are widely used in the connection and reinforcement of metal workpieces, especially in pipeline welding. However, existing electric welders have exposed a series of technical difficulties in practical applications, especially in narrow construction environments.

[0003] When pipe welding is required in a narrow space, such as the pipe system inside a building, pipe connection under a narrow corridor, etc., existing electric welders are often difficult to use effectively. The narrow construction environment limits the operating space of the electric welder, making it difficult for the welder to accurately position the electrode to the welding position, which in turn affects the accuracy and quality of the welding.

[0004] In addition, when welding in narrow places, due to space limitations, welders often find it difficult to find the right angle for welding, making it difficult to control the welding angle. This not only increases the difficulty of welding, but also easily leads to welding defects, such as uneven welds, pores, slag inclusions, etc., which in turn affect the overall strength and sealing of the pipeline system.

[0005] Therefore, how to improve the operating flexibility of the electric welder and the control accuracy of the welding angle in a narrow construction environment, reduce welding defects and improve welding quality has become a technical problem that needs to be urgently solved in the current construction field. Summary of the invention

[0006] An embodiment of the present invention provides a welding method suitable for narrow places. When welding in narrow places, a welding angle adjustment rod is used to adjust the angle of a processed welding rod to facilitate welding of workpieces in narrow operating spaces, effectively solving the problem of difficult operation in narrow places in existing welding processes.

[0007] In view of the above problems, the technical solution proposed by the present invention is:

[0008] A welding method suitable for narrow places, comprising:

[0009] Use tools to grind off the paint, rust and impurities on the welding part of the workpiece surface, and then wipe the workpiece surface with acetone to ensure that the workpiece surface is clean and free of dirt;

[0010] Select the corresponding welding current and voltage according to the welding material and thickness, and adjust the parameters of the welding machine according to the selected current and voltage;

[0011] Use processing pliers to cut the welding rod to the required length, and use processing pliers to remove the coating on the surface of the welding rod to expose the welding core;

[0012] Use a tool to grind the surface of the welding core, and then wipe it with acetone;

[0013] Connect one end of the welding angle adjustment rod to the welding gun, and the other end to the welding core;

[0014] Use the welding angle adjustment rod to adjust the welding angle and then weld the narrow part of the workpiece.

[0015] In order to better implement the technical solution of the present invention, the following technical measures are also adopted.

[0016] Furthermore, the processing pliers include an upper pliers head and a lower pliers head hinged together, and a first cutter and a second cutter are respectively provided on the clamping surfaces of the upper pliers head and the lower pliers head, wherein the first cutter is used to cut off the welding rod, and the second cutter is used to remove the coating on the surface of the welding rod.

[0017] Furthermore, the second cutter includes two bases arranged side by side, the bases are provided with cutting edges, and a chip removal channel is formed between the two bases arranged side by side.

[0018] Furthermore, the cutting edge is provided with a plurality of chip removal holes.

[0019] Furthermore, the width of the chip removal channel is consistent with the diameter of the welding core.

[0020] Further, the step of removing the coating on the surface of the welding rod using the processing pliers includes:

[0021] placing the cut welding rod on the second cutter;

[0022] The processing pliers are controlled to engage the second cutters on the upper pliers head and the lower pliers head with each other, and in this process, the cutting edge cuts off the coating on the surface of one end of the welding core;

[0023] Loosen the processing clamp, rotate the welding rod 90 degrees, and control the processing clamp to engage the second cutters on the upper clamp head and the lower clamp head with each other. In this process, the cutting edge cuts off the remaining coating on the same end surface of the welding core;

[0024] Loosen the processing pliers, place the welding rod between the second cutters of the upper pliers head and the lower pliers head, maintain a gap of 0.5mm to 2.5mm between the cutting edges, rotate the welding rod, and remove the residual coating on the same end surface of the welding core.

[0025] Furthermore, the welding angle adjustment rod includes an extension rod, one end of which is connected to a first movable joint, the first movable joint is connected to a second movable joint via a connecting rod, and the second movable joint is connected to a clamp for clamping the welding core.

[0026] Furthermore, the clamping pliers include a connecting seat connected to the second movable joint, and a first clamp arm and a second clamp arm are hinged on a side of the connecting seat away from the second movable joint. The surfaces of the first clamp arm and the second clamp arm are provided with threads. After the first clamp arm and the second clamp arm are closed to clamp the welding core, the position of the welding core is fixed by a locking ring and the first clamp arm and the second clamp arm through a threaded connection.

[0027] Furthermore, the second movable joint has one degree of freedom with the first movable joint, and the degree of freedom of the second movable joint is completely consistent with that of the first movable joint.

[0028] Furthermore, the welding angle adjustment rod is made of metal, and a soft insulating layer is arranged on the outside of the welding angle adjustment rod.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. When welding in a narrow place, after adjusting the angle using the welding angle adjustment rod, the treated welding rod can be inserted into the narrow place to weld the workpiece, which effectively solves the problem of difficult operation in narrow places in the existing welding process.

[0031] 2. During the welding process, the angle between the electrode and the workpiece in the narrow part can be adjusted at any time through the welding angle adjustment rod, which not only reduces the difficulty of welding in the narrow part, but also can realize the control of the welding angle and improve the welding quality of the workpiece in the narrow part.

[0032] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A flow chart of a welding method applicable to narrow places disclosed in an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the connection structure between the welding angle adjustment rod and the welding gun disclosed in an embodiment of the present invention;

[0035] Figure 3 A schematic structural diagram of a bending angle of a welding angle adjustment rod disclosed in an embodiment of the present invention;

[0036] Figure 4 A schematic structural diagram of another bending angle of the welding angle adjustment rod disclosed in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of welding in a narrow place disclosed in an embodiment of the present invention;

[0038] Figure 6 A schematic diagram of the structure of the processing pliers disclosed in an embodiment of the present invention (at this time, the welding rod is placed on the second cutter, and the coating is not cut and removed);

[0039] Figure 7 It is a structural schematic diagram of the processing pliers disclosed in an embodiment of the present invention (at this time, the second cutters engage with each other to cut and remove the coating of the welding rod).

[0040] Figure numerals: 1. Processing pliers; 11. Upper pliers head; 12. Lower pliers head; 13. First cutter; 14. Second cutter; 14a. Base; 14b. Cutting edge; 14c. Chip removal channel; 14d. Chip removal hole; 2. Welding angle adjustment rod; 21. Extension rod; 22. First movable joint; 23. Connecting rod; 24. Second movable joint; 25. Clamping pliers; 25a. Connecting seat; 25b. First clamp arm; 25c. Second clamp arm; 25d. Locking ring; 3. Welding rod; 31. Welding core; 32. Coating; 4. Welding gun. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] The workpieces that need to be welded during construction include pipes, steel columns, steel beams, steel plates and steel bars. When welding needs to be performed in narrow places, a method of using a bent welding rod 3 to perform welding in narrow places is used. However, this method still has the following problems:

[0043] 1. The coating 32 of the welding rod 3 falls off during the bending process. The coating 32 is a thin film on the surface of the welding rod 3, which contains the agents and components required in the welding process. The main functions of the coating 32 are to provide arc stability, molten metal protection, and remove surface oxides. After the coating 32 falls off, the surface of the welding wire will be exposed to the air during the welding process and is easily oxidized, thereby affecting the quality of the weld. The oxidation of the weld will cause its strength and toughness to decrease, thereby affecting the strength and stability of the entire welded structure.

[0044] 2. Bending the welding rod 3 to a specific angle is inconvenient to operate.

[0045] 3. It can only be bent to a specific angle, and the angle cannot be adjusted at any time (such as when welding round workpieces), and the welding quality cannot be guaranteed.

[0046] Therefore, how to improve the operating flexibility of the electric welder and the control accuracy of the welding angle in a narrow construction environment, reduce welding defects and improve welding quality has become a technical problem that needs to be urgently solved in the current construction field.

[0047] In contrast, the present invention proposes a welding method suitable for narrow places. When welding in narrow places, a welding angle adjustment rod 2 is used to adjust the angle of a processed welding rod 3 to facilitate welding of workpieces in narrow operating spaces, effectively solving the problem of difficulty in operating in narrow places in existing welding processes.

[0048] like Figure 1 As shown, a welding method suitable for narrow places includes the following steps:

[0049] S1, use tools to grind off the paint, rust and impurities on the welding part of the workpiece surface, and then wipe the workpiece surface with acetone to ensure that the workpiece surface is clean and free of dirt.

[0050] S2, selecting corresponding welding current and voltage according to welding material and thickness, and adjusting parameters of the electric welding machine according to the selected current and voltage.

[0051] S3, using the processing pliers 1 to cut the welding rod 3 to a required length, and at the same time using the processing pliers 1 to remove the coating 32 on the surface of the welding rod 3 to expose the welding core 31.

[0052] like Figures 6-7 As shown, the processing pliers 1 include an upper pliers head 11 and a lower pliers head 12 which are hinged to each other, and a first cutter 13 and a second cutter 14 are respectively provided on the clamping surfaces of the upper pliers head 11 and the lower pliers head 12.

[0053] The first cutter 13 is used to cut off the welding rod 3 , and the second cutter 14 is used to remove the coating 32 on the surface of the welding rod 3 .

[0054] The upper pliers head 11 and the lower pliers head 12 both have handles for biting and releasing operations. During the biting process, the following two operations can be performed:

[0055] 1. Cutting operation: place the welding rod 3 between the first cutter 13 of the upper pliers 11 and the lower pliers 12, adjust the cutting position and the position of the first cutter 13, pinch the handles of the upper pliers 11 and the lower pliers 12, and the first cutters 13 of the upper pliers 11 and the lower pliers 12 approach each other to cut the welding rod 3.

[0056] 2. Operation of removing the coating 32 on the surface of the welding rod 3: After placing the welding rod 3 on the second cutter 14 and adjusting the position of the welding rod 3, pinch the handles of the upper pliers 11 and the lower pliers 12 to remove the coating 32 on the surface of the welding rod 3.

[0057] The second cutter 14 includes two bases 14a arranged side by side, a cutting edge 14b is provided on the base 14a, a chip removal channel 14c is formed between the two bases 14a arranged side by side, and the width of the chip removal channel 14c is consistent with the diameter of the welding core 31. At the same time, the cutting edge 14b has a plurality of chip removal holes 14d.

[0058] After the handles of the upper pliers 11 and the lower pliers 12 are pinched, the second cutters 14 of the upper pliers 11 and the lower pliers 12 are brought close to each other to cut off a portion of the coating 32 on the surface of the welding rod 3 .

[0059] The specific steps of removing the coating 32 on the surface of the welding rod 3 using the processing pliers 1 include:

[0060] Placing the cut welding rod 3 on the second cutter 14;

[0061] The processing pliers 1 are controlled to engage the second cutters 14 on the upper pliers head 11 and the lower pliers head 12 with each other, and in this process, the cutting edge 14b cuts off a part of the coating 32 on the surface of the welding core 31;

[0062] One end of the optional welding rod 3 is placed on the second cutter 14 as the peeled end. Since the width of the chip removal channel 14c is consistent with the diameter of the welding core 31, after the second cutter 14 is engaged, part of the coating 32 of the peeled end of the welding rod 3 will be cut off;

[0063] Release the processing clamp 1, rotate the welding rod 3 90 degrees, and control the processing clamp 1 to engage the second cutters 14 on the upper clamp head 11 and the lower clamp head 12 with each other. In this process, the cutting edge 14b cuts off the remaining coating 32 on the surface of the welding core 31;

[0064] The rotation of 90 degrees is used to rotate the peeled portion into the range of the chip removal channel 14c, so as to cut off the remaining part of the peeled end after the second cutter 14 bites;

[0065] Loosen the processing clamp 1, place the welding rod 3 between the second cutter 14 of the upper clamp head 11 and the lower clamp head 12, keep a gap of 0.5mm to 2.5mm between the cutting edges 14b, rotate the welding rod 3 360 degrees, and remove the residual coating 32 on the surface of the welding core 31 through the cutting edge 14b;

[0066] After the peeled end of the welding rod 3 has been cut twice, most of the remaining coating 32 has been removed, but a small part is still attached to the surface of the welding core 31. At this time, by maintaining a gap of 0.5mm to 2.5mm between the cutting edges 14b, the remaining coating 32 on the surface of the peeled end is scraped off by rotating the welding rod 3 to complete the overall peeling operation.

[0067] During the above cutting process, the cut coating 32 is discharged through the chip removal channel 14c and / or the chip removal hole 14d.

[0068] S4, grinding the surface of the welding core 31 with a tool, and then wiping the surface of the welding core 31 with acetone.

[0069] S5, one end of the welding angle adjustment rod 2 is connected to the welding gun 4, and the other end is connected to the welding core 31.

[0070] like Figures 2 to 4 As shown, the welding angle adjustment rod 2 includes an extension rod 21, one end of which is connected to a first movable joint 22, the first movable joint 22 is connected to a second movable joint 24 via a connecting rod 23, and the second movable joint 24 is connected to a clamping pliers 25 for clamping the welding core 31.

[0071] like Figure 3 As shown, the clamping forceps 25 include a connecting base 25a connected to the second movable joint 24, and the first clamp arm 25b and the second clamp arm 25c are hinged on the side of the connecting base 25a away from the second movable joint 24. The surfaces of the first clamp arm 25b and the second clamp arm 25c are provided with threads. After the first clamp arm 25b and the second clamp arm 25c are closed to clamp the welding core 31, the locking ring 25d is connected to the first clamp arm 25b and the second clamp arm 25c through the threaded connection to fix the position of the welding core 31.

[0072] like Figure 1 As shown, the connection process includes:

[0073] S51, insert the welding core 31 between the first clamp arm 25b and the second clamp arm 25c, and then threadably connect the welding core 31 with the first clamp arm 25b and the second clamp arm 25c through the locking ring 25d, so as to fix the welding core 31 between the first clamp arm 25b and the second clamp arm 25c;

[0074] S51, after opening the clamp of the welding gun 4, the other end of the extension rod 21 is inserted into the clamp and the extension rod 21 is fixed.

[0075] S6, after adjusting the welding angle using the welding angle adjustment rod 2, welding is performed on the narrow part of the workpiece.

[0076] The second movable joint 24 and the first movable joint 22 have one degree of freedom, and the degree of freedom of the second movable joint 24 and the degree of freedom of the first movable joint 22 are completely consistent.

[0077] like Figure 2 As shown, at this time, the welding angle adjustment rod 2 is in a straight state.

[0078] like Figure 3 As shown, at this time, the second movable joint 24 and the first movable joint 22 of the welding angle adjustment rod 2 are bent simultaneously.

[0079] like Figure 4 As shown, at this time, the first movable joint 22 of the welding angle adjustment rod 2 is bent.

[0080] Attached Figures 2 to 4, which are the angles of several welding angle adjustment rods 2 provided in this embodiment. Since the second movable joint 24 and the first movable joint 22 have one degree of freedom, and the degree of freedom of the second movable joint 24 and the first movable joint 22 are completely consistent, the corresponding angle can be adjusted according to the welding position of the workpiece in actual use.

[0081] like Figures 2 to 4 As shown, the second movable joint 24 and the first movable joint 22 can be rotated to a desired angle and then maintained at the adjusted angle when no adjustment is made. The second movable joint 24 and the first movable joint 22 adopt the existing technology, which adopts a hinge structure, and the hinge has a damping structure (material damping or mechanical damping) to achieve the above-mentioned adjustment of the angle and the function of maintaining the angle. Since the existing technology is used, its specific working principle is the existing technology known to those skilled in the art and will not be repeated here.

[0082] The above-mentioned welding angle adjustment rod 2 is made of conductive metal such as copper, iron, etc., and is used to electrically connect the welding rod 3 with the welding gun 4. A soft insulating layer (not shown in the accompanying drawings) is arranged on the outside of the welding angle adjustment rod 2, wherein the soft insulating layer is coated on the surface of the welding angle adjustment rod 2 (not shown in the accompanying drawings), and only a part of the extension rod 21 (for connecting with the welding gun 4) and the clamping clamp 25 (for connecting with the welding core 31 of the welding rod 3) are exposed, such as natural rubber, nitrile rubber and ethylene propylene rubber, etc., for avoiding contact with other parts of the workpiece during use to generate an arc that affects the welding and causes harm to personnel.

[0083] like Figure 5 As shown, after adjusting the angle using the welding angle adjustment rod 2, welding operations can be performed conveniently in narrow spaces.

[0084] During the welding process, the welding angle between the welding rod 3 and the workpiece can be changed at any time by adjusting the first movable joint 22 and the second movable joint 24 at any time, which not only reduces the welding difficulty in narrow places but also can realize the control of the welding angle, thereby improving the welding quality of the workpiece in narrow places.

[0085] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A welding method suitable for narrow places, characterized in that: include: Use tools to grind off the paint, rust and impurities on the welding part of the workpiece surface, and then wipe the workpiece surface with acetone to ensure that the workpiece surface is clean and free of dirt; Select the corresponding welding current and voltage according to the welding material and thickness, and adjust the parameters of the welding machine according to the selected current and voltage; Using a processing pliers (1) to cut the welding rod (3) to a required length, and at the same time using the processing pliers (1) to remove the coating (32) on the surface of the welding rod (3) to expose the welding core (31); The processing pliers (1) include an upper pliers head (11) and a lower pliers head (12) which are hinged together, and a first cutter (13) and a second cutter (14) are respectively provided on the clamping surfaces of the upper pliers head (11) and the lower pliers head (12), wherein the first cutter (13) is used to cut off the welding rod (3), and the second cutter (14) is used to remove the coating (32) on the surface of the welding rod (3); Use a tool to grind the surface of the welding core (31), and then wipe it with acetone; One end of the welding angle adjustment rod (2) is connected to the welding gun (4), and the other end is connected to the welding core (31); After adjusting the welding angle using the welding angle adjustment rod (2), welding is performed on the narrow part of the workpiece.

2. The method according to claim 1, characterized in that: The second cutter (14) comprises two bases (14a) arranged side by side, a cutting edge (14b) is arranged on the base (14a), and a chip removal channel (14c) is formed between the two bases (14a) arranged side by side.

3. The method according to claim 2, characterized in that: The cutting edge (14b) is provided with a plurality of chip removal holes (14d).

4. The method according to claim 2, characterized in that: The width of the chip removal channel (14c) is consistent with the diameter of the welding core (31).

5. The method according to claim 4, characterized in that: The step of removing the coating (32) on the surface of the welding rod (3) by using the processing pliers (1) comprises: placing the cut welding rod (3) on the second cutting knife (14); Controlling the processing pliers (1) to engage the second cutters (14) on the upper pliers head (11) and the lower pliers head (12) with each other, during which the cutting edge (14b) cuts off the coating (32) on the surface of one end of the welding core (31); Loosen the processing clamp (1), rotate the welding rod (3) 90 degrees, and control the processing clamp (1) to engage the second cutters (14) on the upper clamp head (11) and the lower clamp head (12) with each other, and in this process, the cutting edge (14b) cuts off the remaining coating (32) on the same end surface of the welding core (31); The processing clamp (1) is loosened, and the welding rod (3) is placed between the second cutter (14) of the upper clamp head (11) and the lower clamp head (12), and a gap of 0.5 mm to 2.5 mm is maintained between the cutting edges (14b), and the welding rod (3) is rotated to remove the residual coating (32) on the same end surface of the welding core (31).

6. The method according to claim 1, characterized in that: The welding angle adjustment rod (2) comprises an extension rod (21), one end of the extension rod (21) is connected to a first movable joint (22), the first movable joint (22) is connected to a second movable joint (24) via a connecting rod (23), and the second movable joint (24) is connected to a clamping forceps (25) for clamping a welding core (31).

7. The method according to claim 6, characterized in that: The clamping pliers (25) include a connecting seat (25a) connected to the second movable joint (24); a first clamping arm (25b) and a second clamping arm (25c) are hingedly connected on one side of the connecting seat (25a) away from the second movable joint (24); threads are arranged on the surfaces of the first clamping arm (25b) and the second clamping arm (25c); after the first clamping arm (25b) and the second clamping arm (25c) are closed to clamp the welding core (31), the position of the welding core (31) is fixed by a locking ring (25d) connected to the first clamping arm (25b) and the second clamping arm (25c) through a threaded connection.

8. The method according to claim 6, characterized in that: The second movable joint (24) and the first movable joint (22) have one degree of freedom, and the degree of freedom of the second movable joint (24) and the degree of freedom of the first movable joint (22) are completely consistent.

9. The method according to any one of claims 1 to 8, characterized in that: The welding angle adjustment rod (2) is made of metal, and a soft insulating layer is arranged on the outside of the welding angle adjustment rod (2).

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