A welding assembly for ship repair

Abstract

This invention relates to the field of welding technology for ship repair, and discloses a welding device for ship repair, including a welding table and legs. The welding table has a through-hole and two welding clamps. A guide rod and a lead screw are installed inside the welding table. A servo motor drives the lead screw to rotate, causing the welding clamps to move horizontally. The device also includes: a hammering section for hammering the oxide shell on the weld; an adjustment section for semi-automatically adjusting the position of the hammering section in conjunction with the welding clamps; and a pre-grinding section for retracting the hammering plate and extending a grinding disc to pre-grind the welded parts. This device achieves automated and precise welding of welded parts by driving the lead screw with a servo motor, and integrates hammering and pre-grinding functions. The adjustment section enables semi-automatic position adjustment, significantly improving the efficiency and quality of ship repair welding operations.

Description

Technical Field

[0001] This invention relates to the field of welding technology for ship repair, and specifically to a welding device for ship repair. Background Technology

[0002] During ship repair, many components need to be connected by welding. For butt welding of components used in ship repair, the usual method is to first position the two components to be welded using clamps or simple tooling, then perform the welding operation. After welding, the oxide scale and slag around the weld are removed by hand, or the weld surface is cleaned using a hand-held grinder. However, existing butt welding devices still have problems that urgently need to be solved.

[0003] For example, welding parts butt welding devices and hammering and pre-grinding are usually separate equipment or tools, making it impossible to continuously complete welding parts butt welding, weld hammering and pre-grinding on the same device. In the case of complex environment and limited space at ship repair sites, this is not conducive to construction organization and efficiency improvement. Summary of the Invention

[0004] This invention provides a welding component docking device for ship repair, which can complete the docking positioning, weld tapping and cleaning, and pre-grinding of welding components on the same platform, thereby improving the docking and welding efficiency and effect, reducing manual labor intensity, and improving the quality of weld cleaning.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] In a first aspect, a welding component docking device for ship repair includes a welding table and symmetrically fixed legs below the welding table. An opening is provided through the welding table, and a collection box is slidably disposed inside the legs. Two docking clamps are symmetrically and translationally disposed on the welding table. A guide rod and a lead screw are symmetrically disposed inside the welding table. One end of the welding table is connected to a servo motor, and the drive end of the servo motor is axially connected to the lead screw. The device also includes:

[0007] The tapping section is located above the welding table. It includes a support drive consisting of a support shell located above the welding table and a belt rotating inside the support shell, and a tapping component consisting of a tapping plate evenly and elastically arranged along the rotation path of the belt and a stop bar that cooperates with the tapping plate and is evenly arranged, to tap the oxide shell on the weld.

[0008] The adjustment section is a movable through-hole docking fixture, which includes a follower connected to the support shell and the docking fixture, and a push adjustment component connected to the follower, so as to cooperate with the docking fixture to semi-automatically adjust the position of the tapping welding section.

[0009] The pre-grinding section is located above the welding table and connected to the hammering section. It includes a friction element consisting of a support belt symmetrically arranged on the outside of the belt and a grinding disc connected to the support belt, as well as a push-pull element connected to the friction element and the hammering element, so as to retract the hammering plate and extend the grinding disc to pre-grind the welded parts.

[0010] Furthermore, the docking fixture includes:

[0011] The push plate has two symmetrical push plates that are movably sleeved on the outside of the guide rod and threaded to the outside of the lead screw.

[0012] Guide channels symmetrically run through the upper part of the welding platform;

[0013] Two electric rods are provided, each fixed to one of the two push plates and movably passing through the guide channel.

[0014] The lower clamp is connected to the outside of the fixed end of the electric rod via a fixing component and is located above the welding table;

[0015] The upper chuck is connected to the telescopic end of the electric rod via a fixing component and is located above the lower chuck.

[0016] Furthermore, the follower includes:

[0017] A passageway, opening through the upper junction;

[0018] The skateboard is symmetrically fixed to the outside of the support shell and moves horizontally through the passage.

[0019] Furthermore, the push-adjustment component includes:

[0020] The slide is fixed to one side of the welding table;

[0021] Plate C is slidably located on the outside of the slide.

[0022] Connecting plates, with lifting and penetrating C-plate settings.

[0023] Furthermore, the support / drive component includes:

[0024] There are two rotating rods that rotate through the support shell and are symmetrically arranged.

[0025] The belt is sleeved on the outside of the rotating rod;

[0026] The speed reducer is fixed to the outside of the support housing, and its output end is axially connected to one of the rotating rods;

[0027] The motor is connected to the input end of the speed reducer.

[0028] Furthermore, the striking element includes:

[0029] Multiple elastic plates are evenly connected to the belt and distributed along the belt's rotation path;

[0030] The striking plate is teardrop-shaped with one sharp end, and the sharp end is connected to the end of the elastic plate away from the belt.

[0031] The stop bar has two rows, symmetrically fixed to the inner wall of the support shell, and cooperates with the striking plate to resist the lifting of the striking plate.

[0032] Furthermore, the friction element includes:

[0033] The support belt has two sections, which are symmetrically arranged inside the support shell and located on the outside of the belt.

[0034] The springs are multiple and evenly distributed along the rotation path of the support belt, with one end connected to the support belt and the other end connected to the belt.

[0035] T-plates, having multiple T-plates, are evenly distributed along the rotation path of the support belts and are connected between two of the support belts, and are interspersed with the striking plate and the stop bar;

[0036] The grinding disc is fixed to the end of the T-plate away from the belt.

[0037] Furthermore, the push-pull component includes:

[0038] The perforation extends through the elastic plate and is located near the belt.

[0039] A steel wire rope is provided, with a through hole and one end connected to the sharp end of the striking plate, and the other end connected to a T-plate adjacent to the non-sharp end of the striking plate.

[0040] Support components are symmetrically arranged throughout the support shell.

[0041] The supporting and pushing components include:

[0042] The lifting rod has four rods, with two rods forming a group. The two groups of lifting rods are symmetrically arranged through the support shell and connected to the support shell by a fixing component.

[0043] The two sets of lifting rods are respectively located at the ends of the two support belts furthest from the T-plate;

[0044] The arc pressure plate is fixed to the telescopic end of the lifting rod by a fixing component and extends to the top of the inner bottom wall of the support belt.

[0045] The above-described solution of the present invention has at least the following beneficial effects:

[0046] The servo motor-driven lead screw and guide rod, along with the push plate and docking fixture, enable synchronous facing or backward translation of the welded parts on the welding table. This results in high docking accuracy and easy operation. Meanwhile, the hammering section above the welding table uses a belt-driven hammering plate, elastically arranged along its path, in conjunction with a stop bar, to continuously hammer the weld seam, efficiently removing oxide crust and slag. The pre-grinding section, with its adjustable grinding discs, pre-grinds the weld area when the hammering plate is retracted, improving weld surface quality. The shifting section, with its follower and push-adjusting components, allows the hammering and pre-grinding sections within the support shell to achieve semi-automatic position adjustment relative to the docking fixture, preventing interference during welding or docking. After welding, they can quickly align above the weld seam, significantly improving the overall efficiency and effectiveness of ship repair welding and docking operations, reducing manual labor intensity, and enhancing the consistency and reliability of weld cleaning and pre-treatment. Attached Figure Description

[0047] Figure 1 An overall perspective view of the welding assembly for ship repair provided in an embodiment of the present invention;

[0048] Figure 2 A cross-sectional plan view of the welding station provided in an embodiment of the present invention;

[0049] Figure 3 A perspective view of the combination of the support shell and the C-plate provided in an embodiment of the present invention;

[0050] Figure 4 This is a cross-sectional plan view of the docking fixture provided in an embodiment of the present invention;

[0051] Figure 5 A perspective view of the belt and striking plate assembly provided in an embodiment of the present invention;

[0052] Figure 6 A cross-sectional plan view of the support shell, belt, support belt and T-plate assembly provided in an embodiment of the present invention;

[0053] Figure 7 A three-dimensional schematic diagram of the combination of lifting rod and arc pressure plate provided in an embodiment of the present invention;

[0054] Figure 8 This is a cross-sectional plan view of the support shell provided in an embodiment of the present invention;

[0055] Figure 9 Provided for embodiments of the present invention Figure 8 Schematic diagram of the structure at point A in the diagram;

[0056] Figure 10 This is a perspective view of the support belt and T-plate assembly provided in an embodiment of the present invention.

[0057] Explanation of reference numerals in the attached figures:

[0058] In the diagram: 1. Welding table; 2. Support leg; 3. Through port; 4. Pallet; 5. Collection box; 6. Guide rod; 7. Lead screw; 8. Servo motor; 9. Push plate; 10. Electric rod; 11. Lower chuck; 12. Upper chuck; 13. Guide rail; 14. Control panel; 15. Slide; 16. C-plate; 17. Roller; 18. Connecting plate; 19. Pull handle; 20. Support shell; 21. Slide plate; 22. Rotating rod; 23. Reducer; 24. Motor; 25. Belt; 26. Elastic plate; 27. Striking plate; 28. Stop bar; 29. ​​Support belt; 30. Spring; 31. T-plate; 32. Grinding disc; 33. Perforation; 34. Steel wire rope; 35. Lifting rod; 36. Arc pressure plate; 37. Through rail. Detailed Implementation

[0059] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0060] like Figures 1 to 10 As shown, an embodiment of the present invention provides a welding component docking device for ship repair, including a welding table 1 and support legs 2 symmetrically fixed below the welding table 1. A through-hole 3 is provided on the welding table 1, and a collection box 5 is slidably disposed inside the support legs 2. Two docking clamps are symmetrically and translatably disposed on the welding table 1. A guide rod 6 and a lead screw 7 are symmetrically disposed inside the welding table 1. One end of the welding table 1 is connected to a servo motor 8, and the drive end of the servo motor 8 is axially connected to the lead screw 7. The device also includes:

[0061] The tapping section is located above the welding table 1. It includes a support drive consisting of a support shell 20 located above the welding table 1 and a belt 25 rotatably located inside the support shell 20, and a tapping component consisting of a tapping plate 27 uniformly and elastically arranged along the rotation path of the belt 25 and a stop bar 28 that cooperates with the tapping plate 27 and is uniformly arranged, to tap the oxide shell on the weld.

[0062] The adjustment section is a movable through-dating fixture, which includes a follower connected to the support shell 20 and the docking fixture, and a push adjustment member connected to the follower, so as to cooperate with the docking fixture to semi-automatically adjust the position of the tapping welding section.

[0063] The pre-grinding section is located above the welding table 1 and connected to the hammering section. It includes a friction element consisting of a support belt 29 symmetrically arranged on the outside of the belt 25 and a grinding disc 32 connected to the support belt 29, as well as a push-pull element connected to the friction element and the hammering element, so as to retract the hammering plate 27 and extend the grinding disc 32 to pre-grind the welded parts.

[0064] Specifically, a support plate 4 is symmetrically arranged below the welding table 1, and the support plate 4 is connected to the support leg 2. The collection box 5 is placed on the support plate 4. The support leg 2 can provide a through channel for fixing the components, so as to fix them at the working location, and can provide support for the support plate 4 and the welding table 1. The support plate 4 can provide a movable support for the collection box 5. The welding table 1 can provide support and movable guidance for the docking fixture, and can provide stable support for the servo motor 8 and the guide rod 6. At the same time, it can provide rotational support for the lead screw 7. A control panel 14 is fixed at one end of the welding table 1, so that the operator can operate and control the operation of the electrical equipment of the welding part docking device. The through port 3 can provide a through channel for the welding slag, so that the welding slag can pass through the welding table 1 and fall into the collection box 5. The lead screw 7 has two symmetrically arranged threads with opposite threading directions, so that the two docking fixtures can move in opposite directions at the same time (to move closer or further away from each other).

[0065] In practical application, the operator can use the fixing components and support legs 2 to fix the welding parts docking device at the work site according to the actual needs. Then, the two welding parts to be docked are moved to the welding table 1 and the welding parts are clamped and fixed using the docking clamp. Afterwards, the operator can operate the control panel 14 to control the servo motor 8 to run, so that the servo motor 8 drives the lead screw 7 to rotate under the support of the welding table 1. Under the action of rotational power, the lead screw 7 can use the thread to push the docking clamp along the guide 13 and move it horizontally under the guidance of the guide rod 6. In this way, the docking clamp can move the clamped welding parts together on the welding table 1, so that the welding surfaces of the welding parts can be docked together. Then, the operator can perform docking welding work on the docked welding parts.

[0066] In a preferred embodiment of the present invention, the docking fixture includes:

[0067] Push plates 9 are two in number, symmetrically and movably sleeved on the outside of guide rod 6, and threadedly connected to the outside of lead screw 7;

[0068] Guide channel 13 symmetrically penetrates the upper end of welding table 1;

[0069] There are two electric rods 10, which are fixed on two push plates 9 respectively and move through the guide channel 13.

[0070] The lower chuck 11 is connected to the outside of the fixed end of the electric rod 10 through a fixing component and is located above the welding table 1;

[0071] The upper chuck 12 is connected to the telescopic end of the electric rod 10 via a fixing component and is located above the lower chuck 11.

[0072] Specifically, the guide rod 6 provides support and movement guidance for the push plate 9, the lead screw 7 can push the push plate 9 using the thread action and rotational power, and can provide support for the push plate 9. The push plate 9 can provide support for the electric rod 10, and the electric rod 10 can provide support for the lower chuck 11 and the upper chuck 12 through the fixed component, and can drive the upper chuck 12 to lift and adjust the height, so that the upper chuck 12 and the lower chuck 11 can clamp the welded parts.

[0073] In practical application, the operator can place the weldment on the welding table 1 between the clamping surfaces of the upper chuck 12 and the lower chuck 11, and then operate the control panel 14 to control the retraction of the electric rod 10. The electric rod 10 uses its telescopic end to drive the upper chuck 12 to move closer to the lower chuck 11, so that the upper chuck 12 can press down on the placed weldment, and with the blocking and supporting effect of the lower chuck 11, it can clamp the weldment. When the lead screw 7 rotates, it will use the rotational power and the thread action to push the push plate 9 according to the rotation direction, so that the two push plates 9 can move closer to each other under the action of the thread and the guide rod 6, so that the push plates 9 can drive the electric rod 10 to move together. The electric rod 10 will then drive the lower chuck 11 and the upper chuck 12 to move together, so that the upper chuck 12 and the lower chuck 11 can drive the clamped weldment to move together to achieve docking.

[0074] In a preferred embodiment of the present invention, the follower includes:

[0075] Passage 37, through which the upper clamp 12 is opened;

[0076] The skateboard 21 is symmetrically fixed on the outside of the support shell 20 and moves through the passageway 37.

[0077] Specifically, the upper clamp 12 can provide space for the passageway 37, the passageway 37 can provide a through channel for the skateboard 21, and the upper clamp 12 can drive the skateboard 21 to move up and down together to achieve synchronous height adjustment.

[0078] The push-adjustment components include:

[0079] Slide 15 is fixed to one side of welding table 1;

[0080] C plate 16 is slidably disposed on the outside of slide 15;

[0081] Connecting plate 18, lifting through plate C 16 is set.

[0082] Specifically, the connecting plate 18 is connected to the support shell 20. The inner top and bottom walls of the C plate 16 are rotatable and inlaid with rollers 17, and the rollers 17 are in contact with the slide 15 to support the movement of the C plate 16. A handle 19 is fixed to the outer side of the C plate 16. The welding table 1 can provide stable support for the slide 15, and the slide 15 can provide rolling support for the rollers 17. The rollers 17 can roll along the slide 15 under the action of external force by using the friction with the slide 15. The handle 19 can facilitate the staff to push the C plate 16, so that the C plate 16 drives the rollers 17 to roll along the slide 15. At the same time, the slide plate 21 and the passage 37 cooperate to provide a moving guide for the C plate 16. The C plate 16 can provide a through channel for the connecting plate 18 to cooperate with the lifting and lowering of the slide plate 21. At the same time, the connecting plate 18 can drive the support shell 20 to move together.

[0083] In practical application, before welding the components, the operator can pull the C-plate 16 using the handle 19, causing the C-plate 16 to move along the slide 15 using the rollers 17. This causes the slide 15 to move together with the support shell 20 and the slide plate 21 via the connecting plate 18. Simultaneously, the slide plate 21 moves through the passage 37 under external force, thereby adjusting the position of the support shell 20 and the components inside it, so that it is offset from the welding surface of the component, avoiding interference with the welding or docking work. After the welding or docking work is completed, the operator can push the C-plate 16 using the handle 19, causing the C-plate 16 to move along the slide 15 via the connecting plate 18 to adjust its position. This allows the support shell 20 to be moved above the weld seam of the component, facilitating tapping or rubbing to clean the welding surface of the component.

[0084] In a preferred embodiment of the present invention, the support member includes:

[0085] Two rotating rods 22 are provided, which rotate through the support shell 20 and are symmetrically arranged.

[0086] The belt 25 is fitted onto the outside of the rotating rod 22;

[0087] The reducer 23 is fixed on the outside of the support shell 20, and its output end is axially connected to one of the rotating rods 22;

[0088] Motor 24 is connected to the input end of reducer 23.

[0089] Specifically, the support shell 20 can provide rotational support for the rotating rod 22, the rotating rod 22 can provide rotational support for the belt 25, and the support shell 20 can stably support the reducer 23. The reducer 23 can provide support for the motor 24. The motor 24 can drive the rotating rod 22 to rotate through the reducer 23, and the rotating rod 22 can drive the belt 25 to rotate using friction and rotational power.

[0090] The striking components include:

[0091] Multiple elastic plates 26 are evenly connected to the belt 25 and distributed along the rotation path of the belt 25;

[0092] The striking plate 27 is teardrop-shaped with one sharp end, and the sharp end is connected to the end of the elastic plate 26 away from the belt 25;

[0093] The stop bar 28 has two rows, symmetrically fixed to the inner wall of the support shell 20, and cooperates with the striking plate 27 to resist the lifting of the striking plate 27.

[0094] Specifically, the belt 25 provides stable support for the elastic plate 26. The elastic plate 26 is elastic and can bend and deform under the action of external force. When the external force disappears, it will rebound and return to its original position. The teardrop shape of the striking plate 27 can move towards the belt 25 gradually under the resistance of the stop bar 28 and the rotation of the belt 25. At the same time, it will gradually push the elastic plate 26 to bend and deform under the support of the belt 25 with the help of external force and the resistance of the stop bar 28. When the striking plate 27 passes the stop bar 28 at its current position, it will be pushed back to its original position by the rebound force of the elastic plate 26.

[0095] In practical application, after welding is completed, the worker can move the support shell 20 above the weld seam. The support shell 20 can then move the belt 25 and the striking plate 27 onto the weld seam via the rotating rod 22. The worker then starts the motor 24, which, through the reducer 23, drives the rotating rod 22 to rotate. Supported by the support shell 20, the rotating rod 22 uses its rotational power to drive the belt 25 to rotate. This belt 25, under external force, drives the striking plate 27 to rotate via the elastic plate 26. During the movement of the striking plate 27, it intermittently contacts the stop bar 28 at different positions and is blocked by the stop bar 28. Simultaneously, the blocking and movement... An external force is applied, causing the striking plate 27 to move towards the belt 25 by using the external force and its own curvature to be blocked by the stop bar 28. During the movement, it squeezes the elastic plate 26. As the belt 25 rotates, the striking plate 27 will move around the stop bar 28 at the current position to the stop bar 28 at the next position. After the striking plate 27 passes the stop bar 28 at the current position, the squeezed elastic plate 26 will use the rebound force to push the striking plate 27 to move quickly towards the weld, so that the striking plate 27 can strike the shell-like weld slag generated by cooling on the weld. By using multiple striking plates 27 and stop bars 28, the shell-like weld slag connected to the entire weld can be knocked off at the same time, improving work efficiency and the effect of knocking off weld slag.

[0096] In a preferred embodiment of the present invention, the friction element includes:

[0097] There are two support belts 29, which are symmetrically arranged inside the support shell 20 and located outside the belt 25;

[0098] Multiple springs 30 are evenly distributed along the rotation path of the support belt 29, with one end connected to the support belt 29 and the other end connected to the belt 25.

[0099] T-plates 31 are multiple and are evenly distributed along the rotation path of the support belts 29, and are connected between two support belts 29, and are interleaved with the striking plate 27 and the stop bar 28.

[0100] The grinding disc 32 is fixed to the end of the T-plate 31 away from the belt 25.

[0101] Specifically, belt 25 can provide support for spring 30, which in turn can provide support for support belt 29. Belt 25 can also drive support belt 29 to rotate together with spring 30. Support belt 29 can provide support for T-plate 31, which in turn can provide support for grinding disc 32. Grinding disc 32 is relatively rough and can use external force to rub and clean the welding surface of the welded parts.

[0102] The push-pull components include:

[0103] The perforation 33 passes through the elastic plate 26 and is located near the belt 25;

[0104] A steel wire rope 34 is provided through the through hole 33, with one end connected to the sharp end of the striking plate 27 and the other end connected to the T-plate 31 adjacent to the non-sharp end of the striking plate 27.

[0105] Support and push parts are symmetrically arranged through the support shell 20;

[0106] The support and push components include:

[0107] There are four lifting rods 35, with two lifting rods 35 forming a group. The two groups of lifting rods 35 are symmetrically arranged through the support shell 20 and connected to the support shell 20 through a fixing component.

[0108] The two sets of lifting rods 35 are located at the ends of the two support belts 29 that are away from the T-plate 31, respectively;

[0109] The arc pressure plate 36 is fixed to the telescopic end of the lifting rod 35 by a fixing component and extends above the inner bottom wall of the support belt 29.

[0110] Specifically, the elastic plate 26 provides space for the perforation 33, which in turn provides a passage and support for the wire rope 34, allowing the wire rope 34 to change its direction of movement. The T-plate 31 can pull the wire rope 34 when it moves away from the belt 25, allowing the wire rope 34 to pull the striking plate 27 towards the belt 25. The support shell 20 provides stable support for the lifting rod 35. The lifting rod 35 can stably support the arc pressure plate 36 using its telescopic end and fixed components. The arc pressure plate 36 has an arc, which reduces the contact area with the support belt 29, avoids affecting the rotational movement of the support belt 29, and can push the support belt 29 away from the belt 25 under the action of external force.

[0111] In practical application, after the welding fixture clamps the weldment, and before or after welding, the operator moves the support shell 20 above the weld seam. Then, the motor 24 is started, causing it to drive the belt 25 to rotate via the reducer 23. The belt 25, in turn, drives the support belt 29 to rotate via the spring 30. The support belt 29 then drives the grinding disc 32 to rotate via the T-plate 31. Subsequently, the lifting rod 35 is extended, causing its extension end to move the arc pressure plate 36 downwards. During this movement, the arc pressure plate 36 pushes the support belt 29 towards the weldment, thus allowing the side of the support belt 29 closest to the weldment to... With the downward tension spring 30, as the support belt 29 rotates, when the T-plate 31 and the grinding disc 32 are moved by the support belt 29 to the space between the belt 25 and the weld seam, they will be blocked and pressed down by the arc pressure plate 36. This causes the T-plate 31 to be pushed by the support belt 29, which in turn pushes the grinding disc 32 downward. As the support belt 29 rotates, the grinding disc 32 can contact the weld seam and the welding surface of the surrounding welded parts at the position between the belt 25 and the weld seam. This allows the grinding disc 32 to rub the weld seam and the surrounding welding surface during the rotation, thereby cleaning the rust and impurities on the weld seam and the surrounding welding surface, preventing rust and impurities from affecting the welding work, or cleaning the weld slag after welding.

[0112] When the T-plate 31 is moved towards the weld seam by the support belt 29, the T-plate 31 will pull the other end of the wire rope 34 towards the weld seam under the action of external force, so that the wire rope 34 can pass through the perforation 33 under the action of external force and change the direction of movement under the support of the elastic plate 26. By pulling the striking plate 27 upward with one end, the striking plate 27 located between the weld seam and the belt 25 can move towards the belt 25 and squeeze the elastic plate 26 connected to it, so that the striking plate 27 located between the weld seam and the belt 25 can be retracted into the support shell 20 to avoid affecting the friction cleaning work of the grinding disc 32.

[0113] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A welding assembly device for ship repair, comprising a welding table and symmetrically fixed legs below the welding table, wherein the welding table has a through opening, a collection box is slidably disposed inside the legs, two welding clamps are symmetrically and translatably disposed on the welding table, a guide rod and a lead screw are disposed through the interior of the welding table, the guide rod and the lead screw are symmetrically positioned, a servo motor is connected to one end of the welding table, and the drive end of the servo motor is axially connected to the lead screw, characterized in that... Also include: Knocking part, set above the welding table, including the support drive composed of the support shell set above the welding table and the rotary belt set in the support shell, and the knocking part composed of the knocking plate uniformly and elastically set along the rotary path of the belt and the stop rod uniformly set with the knocking plate, to knock the oxide shell on the weld; Moving part, moving through the butt joint clamp set, including the follower connected with the support shell and the butt joint clamp, and the push part connected with the follower, to semi-automatically adjust the position of the knocking part with the butt joint clamp; Pre-grinding part, set above the welding table and connected with the knocking part, including the friction part composed of the support belt symmetrically set outside the belt and the grinding plate connected with the support belt, and the push-pull part connected with the friction part and the knocking part, to retract the knocking plate and extend the grinding plate to pre-grind the welding part; The knocking part includes: Elastic plate, having a plurality of, uniformly connected with the belt, and distributed along the rotary path of the belt; The knocking plate is water drop-shaped, one end is sharp, and the sharp end is connected with the end of the elastic plate away from the belt; The stop rod has two rows, is symmetrically fixed on the inner wall of the support shell, and cooperates with the knocking plate to resist lifting the knocking plate; The friction part includes: The support belt has two, symmetrically set in the support shell and located outside the belt; Spring, having a plurality of, uniformly distributed along the rotary path of the support belt, and one end connected with the support belt and the other end connected with the belt; T plate, having a plurality of, uniformly distributed along the rotary path of the support belt, and connected between the two support belts, and staggered with the knocking plate and the stop rod; The grinding plate is fixed at the end of the T plate away from the belt.

2. The welding fixture for ship repair of claim 1, wherein, The butt joint clamp includes: Push plate, having two, symmetrically and movably sleeved outside the guide rod, and threadedly connected outside the lead screw; Guide, symmetrically penetrating the upper end of the welding table; Electric rod, having two, respectively fixed on the two push plates, and movably penetrating the guide; Lower chuck, connected outside the fixed end of the electric rod by the fixed part, and located above the welding table; Upper chuck, connected at the telescopic end of the electric rod by the fixed part, and located above the lower chuck.

3. The welding fixture for a ship repair according to claim 2, characterized in that The follower includes: Throughway, penetrating the upper chuck; Slide plate, symmetrically fixed outside the support shell, and translationally penetrating the throughway.

4. The welding fixture for a ship repair according to claim 3, characterized in that The push part includes: Slide bracket, fixed on one side of the welding table; C plate, slidingly set outside the slide bracket; Connecting plate, liftingly penetrating the C plate.

5. The welding fixture for a ship repair according to claim 4, characterized in that The support drive includes: Rotary rod, having two, rotationally penetrating the support shell and symmetrically set; The belt is sleeved outside the rotary rod; Speed reducer, fixed outside the support shell, and the output end axially connected with one of the rotary rods; Motor, connected with the input end of the speed reducer.

6. The welding fixture for a ship repair according to claim 5, characterized in that The push-pull part includes: Perforation, penetrating the elastic plate and located near the belt; Steel wire rope, penetrating the perforation, one end connected with the sharp end of the knocking plate, and the other end connected with the T plate adjacent to the non-sharp end of the knocking plate; Support pushing part, symmetrically penetrating the support shell.

7. The welding fixture for a ship repair according to claim 6, characterized in that The support pushing part includes: Lifting rod, having four, two of the lifting rods being a group, two groups of the lifting rods symmetrically penetrating the support shell, and connected with the support shell by the fixed part; Two groups of the lifting rods are respectively located at the end of the two support belts away from the T plate; The arc pressure plate is fixed on the telescopic end of the lifting rod by the fixing member and extends above the inner bottom wall of the supporting belt.

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