Automated welding method and apparatus for marine parts

Abstract

The application relates to the field of welding technology, in particular to an automatic welding method and device applied to marine parts. The automatic welding device applied to the marine parts comprises a welding machine body and an auxiliary device; the auxiliary device comprises a supporting frame, a pay-off roll, a winding roll and a one-way assembly; a conductive belt is arranged between the pay-off roll and the winding roll; one end of the conductive belt is fixed on the pay-off roll and wound on the pay-off roll, and the other end of the conductive belt is fixed on the winding roll; in the process that the upper electrode is driven to move upwards to separate the conductive belt from the workpiece after welding, the one-way assembly prevents the pay-off roll from rotating, and the winding roll rotates to wind the conductive belt to tension the conductive belt between the pay-off roll and the winding roll, switch the contact position of the conductive belt and the next workpiece, and remove the adhered impurities, so that the subsequent welding is not affected.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and more specifically to automated welding methods and equipment for marine parts. Background Technology

[0002] The manufacturing of marine components demands extremely high welding quality, as welds must withstand the harsh marine environment, immense structural stress, and corrosion. Resistance welding, as a highly efficient and high-quality joining process, plays a crucial role in hull construction, particularly suitable for thin-plate structures and mass-produced components. Spot welding machines are the most common resistance welding equipment.

[0003] In the prior art, such as the Chinese patent with publication number CN110814494B entitled "A Resistance Welding Machine", the disclosed technical solution describes that an electrode No. 1 is fixedly connected to the side of the worktable away from the main body, and a second electrode No. 2 is provided above the first electrode and moves up and down. During welding, the workpiece to be welded is placed on the first electrode, and the second electrode is driven to move down to abut against the workpiece. Pressure is applied and a huge current is passed through it, generating resistance heat at the contact point to melt it and form a weld point. However, during welding, some impurities may stick to the electrodes. After long-term accumulation of impurities, the welding quality will be affected. Summary of the Invention

[0004] This invention provides an automated welding method and equipment for marine parts to solve the above-mentioned problems.

[0005] The automated welding method and equipment for marine parts of the present invention adopts the following technical solution: the automated welding method and equipment for marine parts includes a welding machine body and auxiliary devices; a lower electrode is fixed on the welding machine body; an upper electrode is provided above the lower electrode; the upper electrode is moved up and down on the welding machine body by a pressing component.

[0006] The auxiliary device includes a support frame, an unwinding roller, a winding roller, and a unidirectional assembly; the support frame is fixed on the upper electrode; the unwinding roller and the winding roller are distributed on both sides of the upper electrode and located below the upper electrode; the unwinding roller and the winding roller are rotatably mounted on the support frame via a rotating assembly; a conductive strip is provided between the unwinding roller and the winding roller; one end of the conductive strip is fixed and wound onto the unwinding roller, and the other end is fixed onto the winding roller.

[0007] The unidirectional assembly is used to tension the conductive strip between the unwinding and take-up rollers. During the process where the upper electrode moves the conductive strip downwards, pressing it against the workpiece, and the workpiece pushes the conductive strip between the unwinding and take-up rollers upwards, the unidirectional assembly prevents the take-up roller from rotating and causes the unwinding roller to rotate, releasing the conductive strip until the workpiece presses the conductive strip against the lower end of the upper electrode. At the end of welding, as the upper electrode moves upwards, causing the conductive strip to detach from the workpiece, the unidirectional assembly prevents the unwinding roller from rotating and causes the take-up roller to rotate, winding the conductive strip to tension it between the unwinding and take-up rollers. This switches the contact position between the conductive strip and the next workpiece and removes any adhering impurities, preventing them from affecting subsequent welding. Simultaneously, the conductive strip forms a protective shield above the workpiece, blocking sparks during welding and improving safety. Furthermore, the conductive strip initially applies some pressure to the workpiece, reducing the pressure of the upper electrode pressing on the workpiece later, thus minimizing wear on the upper electrode.

[0008] Furthermore, the rotating assembly includes an unwinding shaft and a rewinding shaft.

[0009] The unwinding shaft is fixedly connected to the support frame; the unwinding roller is rotatably sleeved on the unwinding shaft;

[0010] The take-up shaft is fixedly connected to the support frame; the take-up roller is rotatably sleeved on the take-up shaft.

[0011] The unidirectional assembly includes an unwinding torsion spring, a first unidirectional structure, a winding torsion spring, and a second unidirectional structure;

[0012] The unwinding torsion spring is fixedly connected between the unwinding roller and the unwinding shaft; initially, the unwinding torsion spring is in a stored state; the first one-way structure is provided between the unwinding shaft and the unwinding roller; the first one-way structure is used to enable unidirectional rotation between the unwinding roller and the unwinding shaft;

[0013] The take-up torsion spring is fixedly connected between the take-up roller and the take-up shaft; initially, the take-up torsion spring is in a stored state, and the stored force of the take-up torsion spring is less than the stored force of the unwinding torsion spring; the second unidirectional structure is provided between the take-up shaft and the take-up roller; the second unidirectional structure is used to enable unidirectional rotation between the take-up roller and the take-up shaft.

[0014] During the process of the workpiece lifting the conductive strip, the first one-way structure allows the unwinding shaft and unwinding roller to rotate relative to each other, and increases the stored force of the unwinding torsion spring. The second one-way structure prevents the take-up roller and take-up shaft from rotating relative to each other, so as to release the conductive strip on the unwinding roller. During the process of the conductive strip detaching from the workpiece, the first one-way structure prevents the unwinding shaft and unwinding roller from rotating relative to each other, and the second one-way structure allows the take-up roller and take-up shaft to rotate relative to each other, so that the release force of the take-up torsion spring drives the take-up roller and take-up shaft to rotate relative to each other, so as to wind the conductive strip between the unwinding roller and take-up roller onto the take-up roller, so as to re-tension the conductive strip between the unwinding roller and take-up roller.

[0015] Furthermore, the first unidirectional structure includes an unwinding groove, an unwinding ratchet, and an unwinding pawl; the unwinding groove is located on the side wall of the unwinding shaft; the unwinding ratchet is coaxially located within the unwinding groove; the unwinding pawl is hinged to the inner side wall of the unwinding roller; a spring connects the unwinding pawl and the unwinding roller; the unwinding pawl and the unwinding ratchet engage in unidirectional engagement.

[0016] The second unidirectional structure includes a take-up groove, a take-up ratchet, and a take-up pawl; the take-up groove is located on the side wall of the take-up shaft; the take-up ratchet is coaxially located within the take-up groove; the take-up pawl is hinged to the inner side wall of the take-up roller; a spring connects the take-up pawl and the take-up roller; the take-up pawl and the take-up ratchet engage in a unidirectional manner.

[0017] Furthermore, a baffle is provided at the upper end of the lower electrode; the baffle is fixed on the side wall of the lower electrode near the take-up roller; during welding, the workpiece and the baffle abut against each other. As the conductive strip moves toward the take-up roller, it obstructs the workpiece, facilitating the workpiece's detachment from the conductive strip. At the same time, the conductive strip provides a pushing force to the workpiece, which helps to loosen the workpiece and the lower electrode, facilitating unloading.

[0018] Furthermore, two guide plates are provided on both sides of the lower end of the upper electrode; the two guide plates are located between the unwinding roller and the take-up roller, and the distance between the two guide plates is greater than the width of the lower electrode; the guide plates are fixed to the side wall of the upper electrode; the guide plates are provided with guide holes; the guide hole on the guide plate near the unwinding roller is located at the lower end of the corresponding guide plate, and the guide hole on the guide plate near the take-up roller is located at the upper end of the corresponding guide plate; the conductive strip passes through the guide holes of the two guide plates in sequence; the conductive strip between the two guide plates is inclined relative to the horizontal plane, and the end near the unwinding roller is lower than the end near the take-up roller. After welding, as the conductive strip moves towards the take-up roller and is wound onto the take-up roller, the inclined conductive strip provides an upward thrust to the workpiece, which, in conjunction with the baffle, facilitates the unloading of the workpiece. Meanwhile, the inclined conductive strip between the two guide plates increases the length of the conductive strip pulled out of the unwinding roller when the workpiece is wider, and conversely, decreases the length of the conductive strip pulled out of the unwinding roller when the workpiece is narrower. This allows the conductive strip to be switched according to the width of the workpiece. The wider the workpiece, the greater the length of the conductive strip that needs to be switched, and vice versa. This reduces the wear and tear of the conductive strip without affecting the welding quality.

[0019] Furthermore, the friction between the guide hole near the unwinding roller and the conductive strip is greater than the friction between the guide hole near the take-up roller and the conductive strip.

[0020] Furthermore, there are two support frames, distributed on both sides of the upper electrode; each support frame includes two support arms; the two support arms are arranged in parallel; the upper end of each support arm is fixed to the upper electrode by bolts, and the lower end is provided with mounting holes; the mounting holes of the two support arms of one support frame are detachably connected to the unwinding shaft, and the mounting holes of the two support arms of the other support frame are detachably connected to the winding shaft.

[0021] Furthermore, the unwinding shaft is threadedly connected to the mounting holes of the two support arms of the corresponding support frame via a nut, and the take-up shaft is threadedly connected to the mounting holes of the two support arms of the corresponding support frame via a nut; the unwinding roller is positioned between the two support arms of the corresponding support frame; the take-up roller is positioned between the two support arms of the corresponding support frame. After the conductive strip is used up, remove the nut to remove the unwinding roller and the take-up roller, and replace with a new conductive strip.

[0022] Furthermore, the pressing assembly includes a pressing hydraulic cylinder; the pressing hydraulic cylinder is fixed on the welding machine body; the piston rod of the pressing hydraulic cylinder is fixedly connected to the upper electrode.

[0023] An automated welding method for marine parts, utilizing the aforementioned automated welding equipment for marine parts, includes the following steps:

[0024] S1, place the workpiece on the lower electrode and make contact with the baffle, and drive the upper electrode downward by pressing down the hydraulic cylinder.

[0025] S2, press the conductive strip against the workpiece.

[0026] S3, the unwinding roller rotates and releases the conductive strip until the workpiece presses the conductive strip against the lower end of the upper electrode.

[0027] S4, during the process of the upper electrode moving upward to remove the conductive strip from the workpiece after welding, the take-up roller rotates to wind up the conductive strip to tension the conductive strip between the unwinding roller and the take-up roller.

[0028] S5, as the conductive strip moves toward and is wound onto the take-up roller, it provides an upward thrust to the workpiece.

[0029] The beneficial effects of this invention are as follows: 1. During the process of the upper electrode driving the conductive strip downward to press the conductive strip against the workpiece, and the workpiece pushing the conductive strip between the unwinding roller and the take-up roller upward, the one-way component prevents the take-up roller from rotating, and causes the unwinding roller to rotate and release the conductive strip until the workpiece presses the conductive strip against the lower end of the upper electrode. During the process of the upper electrode being driven upward to detach the conductive strip from the workpiece at the end of welding, the one-way component prevents the unwinding roller from rotating, and causes the take-up roller to rotate to wind the conductive strip to tighten the conductive strip between the unwinding roller and the take-up roller, switching the contact position between the conductive strip and the next workpiece, and removing any adhering impurities to avoid affecting subsequent welding.

[0030] 2. The conductive strip forms a protective shield above the workpiece, blocking sparks from flying during welding and improving safety.

[0031] 3. After welding, as the inclined conductive strip moves toward the take-up roller and is wound onto it, it provides an upward thrust to the workpiece. In conjunction with the baffle, this facilitates the unloading of the workpiece.

[0032] 4. The inclined conductive strip between the two guide plates increases the length of the conductive strip pulled out of the unwinding roller when the workpiece is wider, and conversely, decreases the length of the conductive strip pulled out of the unwinding roller when the workpiece is narrower. This allows for switching of the conductive strip to the corresponding workpiece based on its width. The wider the workpiece, the greater the length of the conductive strip that needs to be moved during switching, and vice versa. This reduces the wear and tear of the conductive strip without affecting the welding quality.

[0033] 5. Apply some pressure to the workpiece first with the conductive strip to reduce the pressure of the upper electrode on the workpiece, thereby reducing wear on the upper electrode. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of an embodiment of the automated welding equipment for marine parts according to the present invention;

[0036] Figure 2 This is a side view of an embodiment of the automated welding equipment for marine parts according to the present invention;

[0037] Figure 3 This is a schematic diagram of an auxiliary device for an embodiment of an automated welding equipment for marine parts according to the present invention;

[0038] Figure 4 This is a side view of an auxiliary device in an embodiment of an automated welding equipment for marine parts according to the present invention;

[0039] Figure 5 This is a front view of an auxiliary device according to an embodiment of the automated welding equipment for marine parts of the present invention;

[0040] Figure 6 for Figure 5 Enlarged view at point D;

[0041] Figure 7 for Figure 5 A cross-sectional view along the AA direction;

[0042] Figure 8 This is a diagram showing the state of the workpiece being welded by a conductive strip in an embodiment of the automated welding equipment for marine parts according to the present invention.

[0043] Figure 9 for Figure 8 Enlarged view of point B in the middle;

[0044] Figure 10 This is a diagram showing the state of the conductive strip pressing against a workpiece with a larger width during welding, according to an embodiment of the automated welding equipment for marine parts of the present invention.

[0045] Figure 11 for Figure 10 A magnified view of point C in the middle.

[0046] In the diagram: 100, welding machine body; 110, lower electrode; 111, baffle; 120, upper electrode; 121, guide plate; 200, support arm; 300, unwinding roller; 310, unwinding shaft; 400, winding roller; 410, winding shaft; 500, conductive belt; 600, workpiece. Detailed Implementation

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Embodiments of the present invention applied to automated welding equipment for marine parts, such as... Figures 1 to 11 As shown, it includes a welding machine body 100 and auxiliary devices; a lower electrode 110 is fixed on the welding machine body 100; an upper electrode 120 is provided above the lower electrode 110; the upper electrode 120 is mounted on the welding machine body 100 by a pressing assembly.

[0049] The auxiliary device includes a support frame, an unwinding roller 300, a take-up roller 400, and a unidirectional assembly. The support frame is fixed to the upper electrode 120. The unwinding roller 300 and the take-up roller 400 are distributed on both sides of the upper electrode 120 and located below it. The unwinding roller 300 and the take-up roller 400 are rotatably mounted on the support frame via a rotating assembly. A conductive strip 500 is provided between the unwinding roller 300 and the take-up roller 400. One end of the conductive strip 500 is fixed and wound onto the unwinding roller 300, and the other end is fixed onto the take-up roller 400. A baffle 111 is provided at the upper end of the lower electrode 110. The baffle 111 is fixed to the side wall of the lower electrode 110 near the take-up roller 400. During welding, the workpiece 600 abuts against the baffle 111. As the conductive belt 500 moves toward the take-up roller 400, it blocks the workpiece 600, which helps the workpiece 600 to detach from the conductive belt 500. At the same time, the conductive belt 500 provides a pushing force to the workpiece 600, which helps to loosen the workpiece 600 and the lower electrode 110, making it easier to unload.

[0050] Two guide plates 121 are provided on both sides of the lower end of the upper electrode 120. The two guide plates 121 are located between the unwinding roller 300 and the take-up roller 400, and the distance between the two guide plates 121 is greater than the width of the lower electrode 110. The guide plates 121 are fixed to the side wall of the upper electrode 120. The guide plates 121 are provided with guide holes. The guide hole on the guide plate 121 near the unwinding roller 300 is located at the lower end of the corresponding guide plate 121, and the guide hole on the guide plate 121 near the take-up roller 400 is located at the upper end of the corresponding guide plate 121. The conductive strip 500 passes through the guide holes of the two guide plates 121 in sequence. The conductive strip 500 between the two guide plates 121 is inclined relative to the horizontal plane, and the end near the unwinding roller 300 is lower than the end near the take-up roller 400. The friction between the guide hole near the unwinding roller 300 and the conductive strip 500 is greater than the friction between the guide hole near the take-up roller 400 and the conductive strip 500. After welding, the inclined conductive strip 500 provides an upward thrust to the workpiece 600 as it moves towards and is wound onto the take-up roller 400. This, in conjunction with the baffle 111, facilitates the unloading of the workpiece 600. Simultaneously, the inclined conductive strip 500 between the two guide plates 121 increases the length by which a wider workpiece 600 pulls the conductive strip 500 out of the unwinding roller 300, and vice versa. This allows for switching of the conductive strip 500 according to the width of the workpiece 600. Wider workpieces require a longer switching distance for the conductive strip 500, while narrower workpieces require a shorter switching distance. This reduces wear and tear on the conductive strip 500 without compromising welding quality.

[0051] The one-way component is used to tension the conductive strip 500 between the unwinding roller 300 and the take-up roller 400. During the process where the upper electrode 120 moves the conductive strip 500 downwards, pressing it against the workpiece 600, and the workpiece 600 pushes the conductive strip 500 upwards between the unwinding roller 300 and the take-up roller 400, the one-way component prevents the take-up roller 400 from rotating and causes the unwinding roller 300 to rotate and release the conductive strip 500 until the workpiece 600 presses the conductive strip 500 against the lower end of the upper electrode 120. During the process where the upper electrode 120 moves upwards after welding, causing the conductive strip 500 to detach from the workpiece 600, the one-way component prevents the unwinding roller 300 from rotating and causes the take-up roller 400 to rotate and rewind the conductive strip 500, thus tensioning the conductive strip 500 between the unwinding roller 300 and the take-up roller 400, switching the contact position between the conductive strip 500 and the next workpiece 600, and removing any adhering impurities to avoid affecting subsequent welding. Meanwhile, the conductive strip 500 forms a protective shield above the workpiece 600, blocking sparks from flying during welding and improving safety. In addition, the conductive strip 500 first applies some pressure to the workpiece 600, reducing the pressure of the upper electrode 120 on the workpiece 600 afterward, thereby reducing wear on the upper electrode 120.

[0052] The rotating assembly includes an unwinding shaft 310 and a take-up shaft 410. The unwinding shaft 310 is fixedly connected to the support frame; the unwinding roller 300 is rotatably sleeved on the unwinding shaft 310.

[0053] The take-up shaft 410 is fixedly connected to the support frame; the take-up roller 400 is rotatably sleeved on the take-up shaft 410.

[0054] The unidirectional assembly includes an unwinding torsion spring, a first unidirectional structure, a winding torsion spring, and a second unidirectional structure;

[0055] The unwinding torsion spring is fixedly connected between the unwinding roller 300 and the unwinding shaft 310; initially, the unwinding torsion spring is in a stored state; a first unidirectional structure is provided between the unwinding shaft 310 and the unwinding roller 300; the first unidirectional structure is used to enable unidirectional rotation between the unwinding roller 300 and the unwinding shaft 310.

[0056] The take-up torsion spring is fixedly connected between the take-up roller 400 and the take-up shaft 410. Initially, the take-up torsion spring is in a stored state, and the stored force of the take-up torsion spring is less than the stored force of the unwinding torsion spring. The second unidirectional structure is provided between the take-up shaft 410 and the take-up roller 400. The second unidirectional structure is used to enable unidirectional rotation between the take-up roller 400 and the take-up shaft 410.

[0057] During the process of the workpiece 600 pushing the conductive strip 500 upwards, the first one-way structure allows the unwinding shaft 310 and the unwinding roller 300 to rotate relative to each other, and increases the stored force of the unwinding torsion spring. The second one-way structure prevents the take-up roller 400 and the take-up shaft 410 from rotating relative to each other, so as to release the conductive strip 500 on the unwinding roller 300. During the process of the conductive strip 500 detaching from the workpiece 600, the first one-way structure prevents the unwinding shaft 310 and the unwinding roller 300 from rotating relative to each other, and the second one-way structure allows the take-up roller 400 and the take-up shaft 410 to rotate relative to each other, so that the release force of the take-up torsion spring drives the take-up roller 400 and the take-up shaft 410 to rotate relative to each other, so as to wind the conductive strip 500 between the unwinding roller 300 and the take-up roller 400 onto the take-up roller 400, so that the conductive strip 500 between the unwinding roller 300 and the take-up roller 400 is tensioned again.

[0058] The first unidirectional structure includes an unwinding groove, an unwinding ratchet, and an unwinding pawl; the unwinding groove is located on the side wall of the unwinding shaft 310; the unwinding ratchet is coaxially located within the unwinding groove; the unwinding pawl is hinged to the inner side wall of the unwinding roller 300; a spring connects the unwinding pawl and the unwinding roller 300; the unwinding pawl and the unwinding ratchet engage in unidirectional engagement. The second unidirectional structure includes a winding groove, a winding ratchet, and a winding pawl; the winding groove is located on the side wall of the winding shaft 410; the winding ratchet is coaxially located within the winding groove; the winding pawl is hinged to the inner side wall of the winding roller 400; a spring connects the winding pawl and the winding roller 400; the winding pawl and the winding ratchet engage in unidirectional engagement.

[0059] In this embodiment, two support frames are provided, distributed on both sides of the upper electrode 120. Each support frame includes two support arms 200, which are arranged in parallel. The upper ends of the support arms 200 are fixed to the upper electrode 120 by bolts, and the lower ends are provided with mounting holes. The mounting holes of the two support arms 200 of one support frame are detachably connected to the unwinding shaft 310, and the mounting holes of the two support arms 200 of the other support frame are detachably connected to the winding shaft 410. The unwinding shaft 310 is threadedly connected to the mounting holes of the corresponding support arms 200 of the support frame by nuts, and the winding shaft 410 is threadedly connected to the mounting holes of the corresponding support arms 200 of the support frame by nuts. The unwinding roller 300 is disposed between the two support arms 200 of the corresponding support frame, and the winding roller 400 is disposed between the two support arms 200 of the corresponding support frame. After the conductive strip 500 is used up, the nuts are removed to remove the unwinding roller 300 and the winding roller 400, and a new conductive strip 500 is replaced.

[0060] In this embodiment, the pressing component includes a pressing hydraulic cylinder; the pressing hydraulic cylinder is fixed on the welding machine body 100; the piston rod of the pressing hydraulic cylinder is fixedly connected to the upper electrode 120.

[0061] An automated welding method for marine parts, utilizing the aforementioned automated welding equipment for marine parts, includes the following steps:

[0062] S1, place the workpiece 600 on the lower electrode 110 and abut it against the baffle 111, and drive the upper electrode 120 downward by pressing down the hydraulic cylinder.

[0063] S2, press the conductive strip 500 against the workpiece 600.

[0064] S3, the unwinding roller 300 rotates and releases the conductive strip 500 until the workpiece 600 presses the conductive strip 500 against the lower end of the upper electrode 120.

[0065] S4, during the process of the upper electrode 120 moving upward after welding ends, causing the conductive strip 500 to detach from the workpiece 600, the take-up roller 400 rotates to take up the conductive strip 500 to tension the conductive strip 500 between the unwinding roller 300 and the take-up roller 400.

[0066] S5, as the conductive strip 500 moves toward and is wound onto the take-up roller 400, it provides an upward thrust to the workpiece 600.

[0067] In conjunction with the above embodiments, the working principle and operation process of the present invention are as follows: In use, the workpiece 600 is placed on the lower electrode 110 and abuts against the baffle 111. The upper electrode 120 is moved down by the downward hydraulic cylinder. The conductive strip 500 is pressed against the workpiece 600, and the workpiece 600 pushes the conductive strip 500 between the unwinding roller 300 and the take-up roller 400 upward. During this process, the first one-way structure allows the unwinding shaft 310 and the unwinding roller 300 to rotate relative to each other, and increases the stored force of the unwinding torsion spring. The second one-way structure prevents the take-up roller 400 and the take-up shaft 410 from rotating relative to each other, so as to release the conductive strip 500 on the unwinding roller 300 until the workpiece 600 presses the conductive strip 500 against the lower end of the upper electrode 120, and then welding is performed.

[0068] During the process of the upper electrode 120 moving upwards after welding, causing the conductive strip 500 to detach from the workpiece 600, the first unidirectional structure prevents the unwinding shaft 310 and the unwinding roller 300 from rotating relative to each other, while the second unidirectional structure allows the take-up roller 400 and the take-up shaft 410 to rotate relative to each other. This causes the take-up torsion spring to release its force, driving the take-up roller 400 and the take-up shaft 410 to rotate relative to each other, winding the conductive strip 500 between the unwinding roller 300 and the take-up roller 400 onto the take-up roller 400. This re-tensions the conductive strip 500, switching the contact position between the conductive strip 500 and the next workpiece 600, and removing any adhering impurities to avoid affecting subsequent welding. Simultaneously, the conductive strip 500 forms a protective shield above the workpiece 600, blocking sparks from flying during welding and improving safety. In addition, the conductive strip 500 first applies a portion of the pressure to the workpiece 600 to reduce the pressure of the upper electrode 120 on the workpiece 600, thereby reducing the wear on the upper electrode 120.

[0069] During the process of the conductive strip 500 moving towards the take-up roller 400, it blocks the workpiece 600, which helps the workpiece 600 to detach from the conductive strip 500. At the same time, the conductive strip 500 provides a pushing force to the workpiece 600, which helps to loosen the workpiece 600 and the lower electrode 110, making it easier to unload. After welding, as the inclined conductive strip 500 moves towards the take-up roller 400 and is wound onto the take-up roller 400, it provides an upward pushing force to the workpiece 600, which, in conjunction with the baffle 111, facilitates the unloading of the workpiece 600. Meanwhile, the inclined conductive strip 500 between the two guide plates 121 increases the length by which the conductive strip 500 on the unwinding roller 300 is pulled out when the workpiece 600 is wider, and conversely, decreases the length by which the conductive strip 500 on the unwinding roller 300 is pulled out when the workpiece 600 is narrower. This allows the conductive strip 500 to be switched according to the width of the workpiece 600. The wider the workpiece 600, the longer the conductive strip 500 moves when switching, and vice versa. This reduces the wear and tear of the conductive strip 500 without affecting the welding quality.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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. An automated welding apparatus for marine parts, characterized in that: It includes a welding machine body and auxiliary devices; a lower electrode is fixed on the welding machine body; an upper electrode is provided above the lower electrode; the upper electrode is mounted on the welding machine body by moving up and down through a pressing assembly; The auxiliary device includes a support frame, an unwinding roller, a winding roller, and a unidirectional assembly; the support frame is fixed on the upper electrode; the unwinding roller and the winding roller are distributed on both sides of the upper electrode and located below the upper electrode; the unwinding roller and the winding roller are rotatably mounted on the support frame via a rotating assembly; a conductive strip is provided between the unwinding roller and the winding roller; one end of the conductive strip is fixed and wound onto the unwinding roller, and the other end is fixed onto the winding roller; The unidirectional assembly is used to tension the conductive strip between the unwinding roller and the take-up roller. During the process where the upper electrode moves the conductive strip downward to press it against the workpiece and the workpiece pushes the conductive strip between the unwinding roller and the take-up roller upward, the unidirectional assembly prevents the take-up roller from rotating and causes the unwinding roller to rotate and release the conductive strip. During the process where the upper electrode moves upward to remove the conductive strip from the workpiece, the unidirectional assembly prevents the unwinding roller from rotating and causes the take-up roller to rotate and rewind the conductive strip to tension the conductive strip between the unwinding roller and the take-up roller. The rotating assembly includes an unwinding shaft and a take-up shaft; the unwinding shaft is fixedly connected to a support frame; the unwinding roller is rotatably mounted on the unwinding shaft; the take-up shaft is fixedly connected to the support frame; the take-up roller is rotatably mounted on the take-up shaft. The unidirectional assembly includes an unwinding torsion spring, a first unidirectional structure, a winding torsion spring, and a second unidirectional structure; The unwinding torsion spring is fixedly connected between the unwinding roller and the unwinding shaft; initially, the unwinding torsion spring is in a stored state; the first one-way structure is provided between the unwinding shaft and the unwinding roller; the first one-way structure is used to enable unidirectional rotation between the unwinding roller and the unwinding shaft; The take-up torsion spring is fixedly connected between the take-up roller and the take-up shaft; initially, the take-up torsion spring is in a stored state, and the stored force of the take-up torsion spring is less than the stored force of the unwinding torsion spring; the second unidirectional structure is provided between the take-up shaft and the take-up roller; the second unidirectional structure is used to enable unidirectional rotation between the take-up roller and the take-up shaft. A baffle is provided at the upper end of the lower electrode; the baffle is fixed on the side wall of the lower electrode near the take-up roller; during welding, the workpiece and the baffle abut against each other; Two guide plates are provided on both sides of the lower end of the upper electrode; the two guide plates are located between the unwinding roller and the take-up roller, and the distance between the two guide plates is greater than the width of the lower electrode; the guide plates are fixed on the side wall of the upper electrode; the guide plates are provided with guide holes; the guide hole on the guide plate near the unwinding roller is located at the lower end of the corresponding guide plate, and the guide hole on the guide plate near the take-up roller is located at the upper end of the corresponding guide plate; the conductive strip passes through the guide holes of the two guide plates in sequence; the conductive strip between the two guide plates is inclined relative to the horizontal plane, and the end near the unwinding roller is lower than the end near the take-up roller; The friction between the guide hole near the unwinding roller and the conductive strip is greater than the friction between the guide hole near the take-up roller and the conductive strip. During the process of the workpiece lifting the conductive strip, the first one-way structure allows the unwinding shaft and unwinding roller to rotate relative to each other, and increases the stored force of the unwinding torsion spring. The second one-way structure prevents the take-up roller and take-up shaft from rotating relative to each other, so as to release the conductive strip on the unwinding roller. During the process of the conductive strip detaching from the workpiece, the first one-way structure prevents the unwinding shaft and unwinding roller from rotating relative to each other, and the second one-way structure allows the take-up roller and take-up shaft to rotate relative to each other, so that the take-up torsion spring releases its force to drive the take-up roller and take-up shaft to rotate relative to each other, and winds the conductive strip between the unwinding roller and take-up roller onto the take-up roller. The first unidirectional structure includes an unwinding groove, an unwinding ratchet, and an unwinding pawl; the unwinding groove is located on the side wall of the unwinding shaft; the unwinding ratchet is coaxially located within the unwinding groove; the unwinding pawl is hinged to the inner side wall of the unwinding roller; a spring connects the unwinding pawl and the unwinding roller; the unwinding pawl and the unwinding ratchet engage in unidirectional engagement. The second unidirectional structure includes a take-up groove, a take-up ratchet, and a take-up pawl; the take-up groove is located on the side wall of the take-up shaft; the take-up ratchet is coaxially located within the take-up groove; the take-up pawl is hinged to the inner side wall of the take-up roller; a spring connects the take-up pawl and the take-up roller; the take-up pawl and the take-up ratchet engage in a unidirectional manner.

2. The automated welding apparatus for shipboard parts according to claim 1, characterized in that: Two support frames are provided, distributed on both sides of the upper electrode; each support frame includes two support arms; the two support arms are arranged in parallel; the upper end of each support arm is fixed to the upper electrode by bolts, and the lower end is provided with mounting holes; the mounting holes of the two support arms of one support frame are detachably connected to the unwinding shaft, and the mounting holes of the two support arms of the other support frame are detachably connected to the winding shaft.

3. The automated welding apparatus for shipboard parts of claim 2, wherein: The unwinding shaft is threadedly connected to the mounting holes of the two support arms of the corresponding support frame via a nut, and the winding shaft is threadedly connected to the mounting holes of the two support arms of the corresponding support frame via a nut; the unwinding roller is located between the two support arms of the corresponding support frame; the winding roller is located between the two support arms of the corresponding support frame.

4. The automated welding apparatus for shipboard parts of claim 3, wherein: The pressing assembly includes a pressing hydraulic cylinder; the pressing hydraulic cylinder is fixed on the welding machine body; the piston rod of the pressing hydraulic cylinder is fixedly connected to the upper electrode.

5. Method for the automatic welding of marine parts, using the automatic welding plant for marine parts according to claim 4, characterized in that, Includes the following steps: S1, place the workpiece on the lower electrode and make contact with the baffle, and drive the upper electrode to move down by pressing down the hydraulic cylinder; S2, press the conductive strip against the workpiece; S3, the unwinding roller rotates and releases the conductive strip until the workpiece presses the conductive strip against the lower end of the upper electrode; S4, during the process of the upper electrode being moved upward to detach the conductive strip from the workpiece after welding, the take-up roller rotates to wind up the conductive strip to tension the conductive strip between the unwinding roller and the take-up roller. S5, during the process of the conductive strip moving toward and being wound onto the take-up roller, provides an upward thrust to the workpiece.

Images