A manual arc welding device for moving over the surface of a weldment and its use

Abstract

This invention discloses a manual arc welding device that moves across the surface of a workpiece and its usage, relating to the field of welding equipment technology. The invention includes a handle for holding the manual arc welding device; a power mechanism located at the end of the handle for driving a clamping mechanism to rotate; a clamping mechanism, one end of which is vertically fixedly connected to the output end of the power mechanism, and the other end clamping a semi-circular welding rod, with the center of the semi-circular welding rod concentric with the rotation center of the clamping mechanism; and support components symmetrically arranged on both sides of the power mechanism, with the bottom of the support components contacting the workpiece. The welding angle and welding height can be adjusted by adjusting the lengths of the two support components. This invention provides a manual arc welding device that moves across the surface of a workpiece, requiring less skill from technicians, simplifying operation, making welding actions easier to control, ensuring a safe distance between the welding rod tip and the workpiece, and reducing arm fatigue for technicians during operation.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a manual arc welding device that moves on the surface of a workpiece and its usage. Background Technology

[0002] Manual arc welding is currently the most widely used metal welding method. The welding process is completed manually. The technical principle of arc welding is simple, but mastering it requires extensive practice. It is an operational skill that requires long-term accumulation. The control of the welding arm over the welding rod is crucial during welding. The movement of the welding clamp is a three-dimensional dynamic movement with three directions: 1. Moving along the weld seam on the workpiece surface; 2. Laterally swinging within the weld seam area according to the specifications of the workpiece; 3. Continuously changing the arm height downwards, as the welding rod is consumed and shortens, while the operator must maintain a distance of 2-4mm between the tip of the welding rod and the workpiece. The third direction is the most difficult to adjust because, when the arm is suspended, the height must be constantly adjusted according to the different consumption rates of different welding rod sizes, while maintaining a constant welding rod angle. Furthermore, the range of motion in the first two directions must be continuously adjusted as the welding rod length changes, while ensuring that the movement speed in the first two directions is uniform.

[0003] In summary, the difficulty of welding lies in the operation in the third direction mentioned above. The challenge lies in the arm bearing the weight of the welding clamp and power cord while remaining suspended in the air throughout the process. Furthermore, the arm height must be adjusted as the welding rod shortens, while simultaneously ensuring the movement and oscillation of the welding rod. This results in welders experiencing significant fatigue, and skilled welders require extensive practice to produce high-quality welds. Summary of the Invention

[0004] To address the problem of maintaining the distance between the welding rod and the workpiece when using manual arc welding devices in the prior art, this invention provides a manual arc welding device that moves on the surface of the workpiece and its usage. It eliminates the need for technicians to control their arms to maintain the distance between the welding rod and the workpiece. Instead, it is electrically driven, which reduces the skill requirements for technicians, simplifies operation, makes the movements easier to control, makes it easier to maintain the distance between the tip of the welding rod and the workpiece, and alleviates arm fatigue for technicians during operation.

[0005] This invention provides the following technical solution:

[0006] On one hand, the present invention provides a manual arc welding apparatus that moves on the surface of a workpiece, comprising:

[0007] Handle, used to hold the manual arc welding device;

[0008] The power mechanism, located at the end of the handle, is used to drive the clamping mechanism to rotate;

[0009] The clamping mechanism has one end fixedly connected to the output end of the power mechanism, and the other end clamps a semi-circular welding rod, with the center of the semi-circular welding rod being concentric with the rotation center of the clamping mechanism.

[0010] The support components are symmetrically arranged on both sides of the power mechanism. The bottom of the support components contacts the workpiece. The welding angle and welding height can be adjusted by adjusting the length of the two support components.

[0011] Preferably, it also includes a baffle, which is vertically installed at the end of the power mechanism away from the handle. The baffle is provided with a semi-circular guide groove, the center of which is concentric with the rotation center of the clamping mechanism. A stabilizing nut passes through the guide groove and is fixedly connected to the clamping mechanism. By setting the baffle and the guide groove, the handle is guided and fixed, which can prevent the handle from shaking due to the arc force during welding, thereby making the clamping mechanism rotate more smoothly.

[0012] Preferably, the power mechanism includes a motor and a housing, with the housing fixedly installed at one end of the handle; the motor is located inside the housing, and the housing has an opening, through which the clamping mechanism passes and is fixedly connected to the output end of the motor; by setting the motor, the clamping mechanism can be rotated stably to realize the automatic feeding of the welding rod, and by controlling the speed of the motor, the stable feeding of the welding rod can be ensured.

[0013] Preferably, the size of the opening is adapted to the rotation angle of the clamping mechanism.

[0014] Preferably, the clamping mechanism includes a rotating handle and a pressing handle; one end of the rotating handle passes through the opening and is vertically fixedly connected to the output end of the motor, and the other end cooperates with the pressing handle to clamp the welding rod.

[0015] Preferably, the pressure handle is T-shaped, with its middle part rotatably connected to the rotating handle via a rotating shaft. The side of the pressure handle near the power mechanism is fixedly connected to the rotating handle via a spring. On the other side of the pressure handle, there is a protrusion on each of the two opposite surfaces between the pressure handle and the rotating handle, forming a jaw between the two protrusions. The surfaces of the two protrusions are provided with multiple grooves of different sizes at opposite positions. By setting the protrusions and providing grooves of different sizes on the protrusions, the clamping requirements of different specifications of welding rods can be adapted to, so that the welding rods are clamped stably.

[0016] Preferably, the support assembly includes a support screw and a support nut; the support nut is fixedly connected to the power mechanism, and the support screw is threadedly connected to the support nut; the support screws located on both sides of the power mechanism are arranged parallel to each other, and the bottom surfaces of both are in contact with the weldment; by adjusting the length of the bottom of the support screws on both sides of the power mechanism extending beyond the support nut, the tilt angle of the height of the power mechanism can be adjusted, thereby controlling the welding height and welding angle.

[0017] Preferably, the bottom surface of the support screw is set as a hemispherical surface, which can reduce the frictional resistance between the support screw and the weldment, thereby reducing the impact on the welding operation.

[0018] Preferably, the handle is equipped with a speed control switch for starting the motor and adjusting its speed, and a reversing switch for controlling the motor to reverse, so as to facilitate the control of the motor's on / off state, speed, and reversal, thereby controlling the feeding of the welding rod.

[0019] On the other hand, the present invention provides a method of using a manual arc welding apparatus that moves on the surface of a workpiece, comprising the following steps:

[0020] S1: Adjust the length of the support screws extending beyond the support nuts on both sides of the power mechanism according to the specifications of the workpiece, the specifications of the welding rod, and the welding position, so that the manual arc welding device can achieve the required welding height and welding angle.

[0021] S2: Observe the position of the rotating handle and use the combination of speed control switch and reverse switch to make the rotating handle reach the starting position of welding.

[0022] S3: Press down the handle to insert the electrode head into the jaws of the clamp, then release the handle;

[0023] S4: Hold the handle and perform arc ignition on the workpiece. Once the arc is successfully ignited, support the manual arc welding device on the workpiece surface and begin the electrode manipulation.

[0024] S5: After starting the electrode feeding, push the speed control switch forward. The motor drives the handle to rotate around the motor shaft, and the welding electrode begins to be fed to the weld seam.

[0025] S6: Observe whether the electrode consumption rate and electrode feeding rate are appropriate. If they are not appropriate, the electrode feeding rate can be matched by adjusting the pushing force of the speed control switch.

[0026] S7: Continue the electrode manipulation operation. During the operation, the operator may pull the handle laterally or swing the manual arc welding device laterally on the surface of the workpiece as needed.

[0027] S8: Replace with new welding rods after the welding rods are used up;

[0028] S9: Repeat steps S2-S8 to complete the welding operation for this workpiece.

[0029] The beneficial effects of this invention are as follows: This invention changes the traditional arc welding electrode from a straight line to a semi-circular shape, and drives the clamping mechanism holding the semi-circular electrode to rotate through a power mechanism, thus completing the automatic feeding of the electrode; at the same time, support components are also provided on both sides of the power mechanism, allowing technicians to directly support the manual arc welding device on the workpiece for welding, and use it in conjunction with the power mechanism and clamping mechanism, so that the arm is no longer suspended in the air during the entire welding process; compared with the traditional manual arc welding device, this invention simplifies three-dimensional dynamic movement to two-dimensional dynamic movement, which not only requires less skill from the technician, but also makes the welding action easier to control, makes it easier to maintain the distance between the tip of the electrode and the workpiece, and can alleviate arm fatigue of the technician during operation. Attached Figure Description

[0030] Figure 1 This is a front view of the three-dimensional structure of the present invention;

[0031] Figure 2 This is the front view of the present invention;

[0032] Figure 3 This is a three-dimensional structural schematic diagram of the present invention from another angle;

[0033] Figure 4 This is a schematic diagram of the rotating handle and pressure handle of the present invention.

[0034] In the diagram: 1. Handle; 101. Speed ​​control switch; 102. Reverse switch; 2. Power mechanism; 201. Housing; 202. Opening; 203. Motor; 3. Clamping mechanism; 301. Rotating handle; 302. Pressing handle; 303. Stabilizing nut; 304. Spring; 305. Protrusion; 306. Rotating shaft; 4. Welding rod; 5. Support assembly; 501. Support screw; 502. Support nut; 6. Baffle; 601. Guide groove; 602. Wire groove; 7. Power cord. Detailed Implementation

[0035] like Figure 1 , Figure 2 As shown, a manual arc welding device that moves on the surface of a workpiece includes a handle 1, a power mechanism 2, a clamping mechanism 3 for clamping a welding electrode 4, a support assembly 5, and a baffle 6.

[0036] Handle 1 is used to hold the manual arc welding device; power mechanism 2 is located at the end of handle 1 and is used to drive clamping mechanism 3 to rotate; one end of clamping mechanism 3 is vertically fixedly connected to the output end of power mechanism 2, and the other end clamps a semi-circular welding rod 4, and the center of the semi-circular welding rod 4 is concentric with the rotation center of clamping mechanism 3, so as to ensure that welding rod 4 can always rotate on the same arc when clamping mechanism 3 rotates, thus making it easier to control the distance between the front end of welding rod 4 and the workpiece; support components 5 are symmetrically arranged on both sides of power mechanism 2, and the bottom of support components 5 contacts the workpiece. The welding angle and welding height can be adjusted by adjusting the length of the two support components 5.

[0037] In this embodiment, the welding rod used in traditional arc welding is changed from a straight shape to a semi-circular shape. The clamping mechanism 3, which holds the semi-circular welding rod 4, is driven to rotate by the power mechanism 2, which can automatically feed the welding rod 4. At the same time, support components 5 are also provided on both sides of the power mechanism 2, so that technicians can directly support the manual arc welding device on the workpiece for welding. It can be used in conjunction with the power mechanism 2 and the clamping mechanism 3, so that the arm is no longer suspended in the air during the entire welding process.

[0038] Furthermore, the clamping mechanism 3 includes a rotating handle 301 and a pressing handle 302; one end of the rotating handle 301 passes through the opening 202 and is vertically fixedly connected to the output end of the motor 203, and the other end cooperates with the pressing handle 302 to clamp the welding rod 4.

[0039] Combination Figure 4 As shown, the pressure handle 302 is T-shaped, with its middle part rotatably connected to the handle 301 via a pivot 306. The side of the pressure handle 302 closest to the power mechanism 2 is fixedly connected to the handle 301 via a spring 304. On the other side of the pressure handle 302, each of the two opposing surfaces between it and the handle 301 has a protrusion 305 made of copper. The two protrusions 305 form a jaw, and the surfaces of the two protrusions 305 have multiple grooves of varying sizes at corresponding positions. After the grooves come into contact, they form a round hole for clamping the welding rod 4. In this embodiment, by setting a protrusion 305 and setting grooves of different sizes on the protrusion 305, it can adapt to the clamping requirements of welding rods 4 of different specifications, so that the welding rod 4 is clamped stably. Press the end of the pressure handle 302 close to the power mechanism 2 to compress the spring 304 and open the jaws. Then, put the head of the welding rod 4 into the jaws and adjust the position of the welding rod 4. Then, release the pressure handle 302 to release the compression force of the spring 304, and the welding rod 4 can be clamped in the clamping mechanism 3.

[0040] Furthermore, the power mechanism 2 includes a motor 203 and a housing 201. The housing 201 is fixedly installed at one end of the handle 1. The motor 203 is located inside the housing 201, and the housing 201 has an opening 202. The size of the opening 202 is adapted to the rotation angle of the clamping mechanism 3. The clamping mechanism 3 passes through the opening 202 and is fixedly connected to the output end of the motor 203. By setting the motor 203, the clamping mechanism 3 holding the semi-circular welding rod 4 is made to rotate stably, thereby realizing the automatic feeding of the welding rod 4. By controlling the speed of the motor 203, the stable feeding of the welding rod 4 can be ensured.

[0041] like Figure 3 As shown, the baffle 6 is vertically installed at the end of the power mechanism 2 away from the handle 1. The baffle 6 is provided with a semi-circular guide groove 601 and a semi-circular wire groove 602, and the centers of the guide groove 601 and the wire groove 602 are both concentric with the rotation center of the clamping mechanism 3. The stabilizing nut 303 passes through the guide groove 601 and is fixedly connected to the rotating handle 301 of the clamping mechanism 3. By setting the baffle 6 and the guide groove 601, the rotating handle 301 can be guided and fixed, which can prevent the rotating handle from shaking due to the arc force during welding, thereby making the rotation of the clamping mechanism 3 more stable. The power cord 7 passes through the wire groove 602 and is guided into the jaw. The power cord 7 slides in the wire groove 602 as the rotating handle 301 rotates, thereby avoiding the power cord 7 from getting tangled during welding.

[0042] Furthermore, the support assembly 5 includes a support screw 501 and a support nut 502; the bottom surface of the support screw 501 is set as a hemispherical surface; the support nut 502 is fixedly connected to the power mechanism 2, and the support screw 501 is threadedly connected to the support nut 502; the support screws 501 located on both sides of the power mechanism 2 are arranged parallel to each other, and the bottom surfaces of both are in contact with the workpiece; by setting the hemispherical surface, the frictional resistance between the support screw 501 and the workpiece can be reduced, thereby reducing the impact on the welding operation; by adjusting the length of the bottom of the support screw 501 on both sides of the power mechanism 2 extending beyond the corresponding support nut 502, the tilt angle of the height of the power mechanism 2 can be adjusted, thereby controlling the welding height and welding angle of the manual arc welding device.

[0043] Furthermore, the handle 1 is equipped with a speed control switch 101 for starting the motor 203 and adjusting its speed, and a reversing switch 102 for controlling the reversal of the motor 203. The maximum speed of the motor 203 is the consumption rate of the largest specification welding rod commonly used in this embodiment, and the minimum speed of the motor 203 is the consumption rate of the smallest specification welding rod commonly used in this embodiment. By controlling the switching, speed and reversal of the motor 203, the position and conveying speed of the welding rod 4 can be adjusted, thereby making it easy to ensure the distance between the tip of the welding rod 4 and the workpiece.

[0044] The use of a manual arc welding device that moves on the surface of a workpiece includes the following steps:

[0045] S1: Adjust the length of the support screws 501 extending from the support nuts 502 on both sides of the power mechanism 2 according to factors such as the specifications of the weldment, the specifications of the welding rod, and the welding position, so that the manual arc welding device can achieve the required welding height and welding angle.

[0046] S2: Observe the position of the rotating handle 301. Use the combination of speed control switch 101 and reverse switch 102 to make the rotating handle 301 reach the starting position of welding, that is, the rightmost limit position where the rotating handle 301 can rotate.

[0047] S3: Press down the handle 302 to insert the head of the welding rod 4 into the jaws, then release the handle 302;

[0048] S4: Hold handle 1 and perform arc ignition on the workpiece. Once the arc is successfully ignited, support the manual arc welding device on the workpiece surface and begin the electrode manipulation.

[0049] S5: After starting the electrode feeding, push the speed control switch 101 forward. The motor 203 drives the handle 301 to rotate around the motor shaft, and the welding rod 4 begins to be fed to the weld.

[0050] S6: Observe whether the consumption speed of welding rod 4 is appropriate to the welding rod feeding speed. If it is not appropriate, the pushing force of speed control switch 101 can be adjusted to match the welding rod feeding speed.

[0051] S7: Continue the electrode manipulation operation. During the operation, the operator may pull the handle 1 laterally or swing the manual arc welding device laterally on the surface of the workpiece as needed.

[0052] S8: Replace with a new welding electrode after welding electrode 4 is used up;

[0053] S9: Repeat steps S2-S8 to complete the welding operation for this workpiece.

[0054] Compared to traditional manual arc welding equipment, this invention simplifies three-dimensional dynamic movement to two-dimensional dynamic movement, which not only requires less skill from technicians, but also makes the welding action easier to control, makes it easier to maintain the distance between the tip of the welding rod and the workpiece, and can alleviate arm fatigue for technicians during operation.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A manual arc welding device that moves on the surface of a workpiece, characterized in that: include: Handle (1), used to hold the manual arc welding device; The power mechanism (2) is located at the end of the handle (1) and is used to drive the clamping mechanism (3) to rotate; The clamping mechanism (3) has one end vertically fixedly connected to the output end of the power mechanism (2), and the other end clamps a semi-circular welding rod (4), with the center of the semi-circular welding rod (4) being concentric with the rotation center of the clamping mechanism (3). The support components (5) are symmetrically arranged on both sides of the power mechanism (2). The bottom of the support components (5) contacts the weldment. The welding angle and welding height can be adjusted by adjusting the length of the two support components (5). It also includes a baffle (6), which is vertically installed at the end of the power mechanism (2) away from the handle (1). A semi-circular guide groove (601) is provided on the baffle (6). The center of the guide groove (601) is concentric with the rotation center of the clamping mechanism (3). The stabilizing nut (303) passes through the guide groove (601) and is fixedly connected to the clamping mechanism (3). The clamping mechanism (3) includes a rotating handle (301) and a pressing handle (302); one end of the rotating handle (301) passes through the opening (202) and is vertically fixedly connected to the output end of the motor (203), and the other end cooperates with the pressing handle (302) to clamp the welding rod (4). The pressure handle (302) is T-shaped in general. Its middle part is rotatably connected to the handle (301) through the pivot (306). The side of the pressure handle (302) near the power mechanism (2) is fixedly connected to the handle (301) through the spring (304). The other side of the pressure handle (302) and the two opposite surfaces between the handle (301) are provided with a protrusion (305). The two protrusions (305) form a jaw, and the surfaces of the two protrusions (305) are provided with multiple grooves of different sizes at opposite positions.

2. The manual arc welding device that moves on the surface of the workpiece according to claim 1, characterized in that: The power mechanism (2) includes a motor (203) and a housing (201). The housing (201) is fixedly installed at one end of the handle (1). The motor (203) is located inside the housing (201), and the housing (201) has an opening (202). The clamping mechanism (3) passes through the opening (202) and is fixedly connected to the output end of the motor (203).

3. The manual arc welding device that moves on the surface of the workpiece according to claim 2, characterized in that: The size of the opening (202) is adapted to the rotation angle of the clamping mechanism (3).

4. The manual arc welding device that moves on the surface of the workpiece according to claim 2, characterized in that: The support assembly (5) includes a support screw (501) and a support nut (502); the support nut (502) is fixedly connected to the power mechanism (2), and the support screw (501) is threadedly connected to the support nut (502); the support screws (501) located on both sides of the power mechanism (2) are arranged parallel to each other, and the bottom surfaces of both are in contact with the weldment.

5. The manual arc welding device that moves on the surface of the workpiece according to claim 4, characterized in that: The bottom surface of the support screw (501) is set as a hemispherical surface.

6. The manual arc welding device that moves on the surface of the workpiece according to claim 2, characterized in that: The handle (1) is provided with a speed control switch (101) for starting the motor (203) and adjusting the speed, and a reversing switch (102) for controlling the motor (203) to reverse.

7. A method of using a manual arc welding apparatus that moves on the surface of a workpiece according to any one of claims 1-6, characterized in that, Includes the following steps: S1: Adjust the length of the support screws (501) extending out of the support nuts (502) on both sides of the power mechanism (2) according to the specifications of the weldment, the specifications of the welding rod, and the welding position, so that the manual arc welding device can reach the required welding height and welding angle. S2: Observe the position of the rotating handle (301). Use the speed control switch (101) and the reverse switch (102) in combination to make the rotating handle (301) reach the starting position of welding. S3: Press down the handle (302) to insert the head of the welding rod (4) into the jaws and then release the handle (302). S4: Hold the handle (1) and perform arc ignition on the workpiece. Once the arc is successfully ignited, support the manual arc welding device on the workpiece surface and begin the electrode operation. S5: After starting to move the electrode, push the speed control switch (101) forward. The motor (203) drives the handle (301) to rotate around the motor shaft. The welding electrode (4) begins to be conveyed to the weld. S6: Observe whether the consumption speed of the welding rod (4) is appropriate to the welding rod feeding speed. If it is not appropriate, the pushing force of the speed control switch (101) can be adjusted to match the welding rod feeding speed. S7: Continue the bar manipulation operation. During the operation, the operator may pull the handle (1) on the surface of the workpiece to move or swing the manual arc welding device laterally as needed. S8: Replace with a new welding rod after the welding rod (4) has been used up; S9: Repeat steps S2-S8 to complete the welding operation for this workpiece.

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