Laser welding device and method for small excavator accessories

Abstract

The application relates to the technical field of laser welding of excavator accessories, in particular to a laser welding device and method for small excavator accessories, the welding device comprising a bottom plate, side plates, a laser welding head, cylinders and circular plates, the side plates being fixedly installed on the top of the bottom plate, the laser welding head being arranged above the bottom plate, the two cylinders being rotatably installed at the sides, away from each other, of the two side plates, the outer sides of the cylinders being slidably sleeved with the circular plates, and the sides, close to each other, of the two circular plates being fixedly connected with horizontal plates. After the welding of pipe materials or hollow shell members is completed, the sealing performance of the welded part can be automatically detected and marked in time, small holes or gaps can be welded and repaired in time, the stability of the member is ensured when the member is used, the member is not prone to breaking for a long time, and the quality of the member is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser welding of excavator accessories, in particular to a laser welding device and method for small excavator accessories. BACKGROUND

[0002] Small excavators are also known as small excavating machines. Excavators are composed of various parts and accessories. During the production process, the parts and accessories need to be combined and welded. Laser welding technology is widely used in the welding process of small excavator accessories due to its high precision, high efficiency, and good welding quality. Laser welding technology plays an important role in the production of small excavator accessories, not only improving the welding quality, but also helping to improve production efficiency and reduce costs. Small excavator accessories include pipe, hollow shell components, and sheet metal, etc.

[0003] CN217571504U discloses a welding clamping device for excavator accessory production, which includes a workbench and support legs supporting the workbench. The upper end of the workbench is provided with a moving groove. The moving groove is provided with mirror image clamping mechanisms and a limiting device that limits the movement of the clamping mechanisms. The upper end of the clamping block is provided with a threaded rod. The outer side of the threaded rod is provided with a baffle. The moving groove includes a moving area and a sliding groove from top to bottom. The lower end of the support rod is provided with a sliding block that cooperates with the sliding groove. The utility model has the advantages that the support rod is moved in the moving groove by the spring, the two clamping blocks are close to each other to clamp the pipe, the limiting pin of the limiting device is installed in the pin hole to achieve positioning, and the abutting block and the baffle limit the upper and lower ends of the pipe, so that the pipe is fixed firmly without the need for manual fixing, saving time and effort and improving efficiency.

[0004] When welding pipe or hollow shell components, the pipe or hollow shell components need to be fixed, and the annular gap formed by the contact part needs to be welded.

[0005] However, after the pipe or hollow shell components are welded, the sealing of the welded part cannot be automatically detected and marked in a timely manner. When there is a missed welding situation during laser welding, small holes or gaps in the welding points are not easy to be found, and the small holes or gaps cannot be welded and repaired in a timely manner. When the components are in use, the stability of the components cannot be guaranteed, which makes the components prone to breakage for a long time, reducing the quality of the components. Therefore, we propose a laser welding device and method for small excavator accessories to solve the above problems. SUMMARY

[0006] The purpose of the present application is to provide a laser welding device and method for small excavator accessories to solve the problems raised in the background.

[0007] To achieve the above object, the present application provides the following technical solutions: a laser welding device for small excavator accessories, the welding device comprising a bottom plate, side plates, a laser welding head, cylinders and circular plates;

[0008] The side plates are fixedly installed on the top of the bottom plate, the laser welding head is arranged above the bottom plate, the two cylinders are rotatably installed at the ends away from each other and on the sides close to each other of the two side plates, the outer side of the cylinder is slidably sleeved with a circular plate, and the sides close to each other of the two circular plates are fixedly connected with a horizontal plate.

[0009] The welding device further comprises a weld seam closed loop detection mechanism, the weld seam closed loop detection mechanism comprising a circular pipe, a fan and a connecting box, the fan is fixedly installed on the top of the bottom plate, the air outlet end of the fan extends into one of the left cylinders, the circular pipe is rotatably installed on the right side of one of the side plates, the circular pipe is in communication with one of the right cylinders and is fixedly connected, the connecting box is fixedly installed on the top of the bottom plate through a support frame, the outer side of the circular pipe is rotatably connected with the inner side of the connecting box, triangular holes are formed in the front and rear inner walls of the connecting box, the inner side of the connecting box is slidably sleeved with an elastically movable rectangular plate, and the closed loop condition of the weld seam is obtained by obtaining the position of the rectangular plate.

[0010] The welding device further comprises a marking assembly for marking the weld seam gap.

[0011] After the pipe or the hollow shell member is welded, the sealing property of the welded part can be detected and marked in time, small holes or gaps can be welded and repaired in time, the stability of the member is ensured when the member is used, the member is not prone to breaking for a long time, and the quality of the member is improved.

[0012] Further preferably, the top of the bottom plate is fixedly connected with two support rods, the outer side of the support rod is fixedly connected with a first hydraulic cylinder, the output end of the first hydraulic cylinder is fixedly connected with a semicircular ring block, and the two semicircular ring blocks close to each other can form a circular ring block with a notch at the top.

[0013] Further preferably, the top of the bottom plate is fixedly connected with a support plate, the outer side of the support plate is fixedly connected with a second hydraulic cylinder, the output end of the second hydraulic cylinder is fixedly connected with an L-shaped block, the top inner wall of the L-shaped block is fixedly connected with a third hydraulic cylinder, and the output end of the third hydraulic cylinder is fixedly connected with the top of the laser welding head.

[0014] Further preferably, the top and bottom of the cylinder are fixedly connected with connecting seats, the outer side of the connecting seat is fixedly connected with a first electric telescopic rod, the output end of the first electric telescopic rod is fixedly connected with the outer side of the corresponding circular plate, and the first electric telescopic rod is used to clamp the excavator accessory through the movement of the movable end of the first electric telescopic rod.

[0015] Further preferably, the outer side of the left one of the cylinders is fixedly sleeved with an outer gear ring, the left side of the left one of the side plates is fixedly connected with a motor, the output end of the motor is fixedly connected with a gear, and the outer gear ring is engaged with the gear, so that the excavator accessory is rotated through the rotation of the motor.

[0016] When the excavator accessory is placed on the top of the horizontal plate, the first electric telescopic rod is started to drive the circular plate to move, the circular plate slides on the outer side of the cylinder, the two circular plates move towards each other and drive the two excavator accessories to move, so that the excavator accessories are in contact with each other and form a circular weld seam that needs to be welded, and the two excavator accessories are concentric with the circular plate, then the third hydraulic cylinder is started to drive the laser welding head to move downwards to a suitable position, and the laser welding head and the motor are started, the motor drives the gear to rotate, the gear drives the outer gear ring to rotate, the outer gear ring drives the left one of the cylinders to rotate, the left one of the cylinders drives the left excavator accessory to rotate through the circular plate, and the left excavator accessory drives the right excavator accessory, so that the laser welding head performs welding work on the circular weld seam of the excavator accessories in contact with each other.

[0017] Further preferably, the right side of the rectangular plate is fixedly connected with a first circular rod, the inner side of the connecting box is fixedly sleeved with a fixed plate, the fixed plate is slidably sleeved on the outer side of the first circular rod, the inner side of the connecting box is slidably sleeved with a connecting plate, the right end of the first circular rod is fixedly connected with the left side of the connecting plate, the fixed plate and the connecting plate are fixedly connected with the same spring that is movably sleeved on the outer side of the first circular rod, the top right side of the connecting box is communicated and fixedly connected with a gas compensation pipe, and the top of the connecting box is communicated and fixedly connected with an air inlet valve located between the fixed plate and the connecting plate.

[0018] When the laser welding head and the motor are closed after welding, the present application can detect the circular weld to detect whether there are missing points of the weld, when detecting, the first hydraulic cylinder is started in forward direction to drive the semicircular ring block to move, the two semicircular ring blocks wrap the circular weld and form a circular ring block with a notch at the top at the same time, the fan and the motor are started at the same time, the wind generated by the fan passes through a cylinder on the left, the excavator accessory, a cylinder on the right and the circular pipe in turn and enters into the connecting box, at this time, the rectangular plate is driven to move to the right under the action of the wind pressure, the rectangular plate drives the connecting plate to move through the first circular rod, the connecting plate makes the external gas pass through the air inlet valve and enter into the area between the connecting plate and the fixed plate during the movement, the connecting plate discharges the gas on the right side thereof through the gas compensation pipe, and the connecting plate stretches the spring during the movement.

[0019] Further preferably, the top of the bottom plate is fixedly provided with a storage box with pigment inside, a U-shaped pipe is in communication and fixed between the bottom of the connecting box and the right top of the storage box, an air outlet valve is in communication and fixed at the left top end of the U-shaped pipe, the right top end of the U-shaped pipe is located between the fixed plate and the connecting plate, the right top of the U-shaped pipe is in communication with the chamber between the fixed plate and the connecting plate, a spraying pipe is in communication and fixed at the top of the storage box, a nozzle is in communication at the top end of the spraying pipe, the bottom end of the spraying pipe extends to the inside bottom of the storage box, and an L-shaped feeding pipe is in communication and fixed at the left side of the storage box, when the weld has a notch, the pressure in the storage box increases when the connecting plate moves to the left, and the pigment in the storage box is sprayed out through the nozzle to mark the weld notch.

[0020] When the wind pressure generated by the fan is constant, the range of the triangular hole exposed on the left side of the rectangular plate becomes larger during the movement of the rectangular plate to the right, the excess pressure in the connecting box is discharged through the triangular hole on the left side of the rectangular plate, and the spring in the stretched state cooperates to make the rectangular plate move to the middle position of the triangular hole and remain stable, and the motor works to drive the excavator accessory to rotate slowly, when the weld is missing, the wind generated by the fan is discharged through the notch formed by the two semicircular ring blocks, the amount of wind discharged into the connecting box through the circular pipe is reduced, the pressure in the connecting box is reduced, the spring in the stretched state is acted on in the opposite direction, the spring force drives the connecting plate to move to the left, the connecting plate can drive the rectangular plate to move to the left through the first circular rod, and the connecting plate discharges the gas between the left side thereof and the fixed plate into the storage box through the air outlet valve at the left end of the U-shaped pipe during the movement, thereby increasing the pressure in the storage box, so that the ink in the storage box is sprayed out to the right excavator accessory through the spraying pipe and is marked, and the motor continues to work to continuously mark other holes or gaps in the weld.

[0021] Wherein, because the triangular hole is arranged to be gradually reduced in shape from left to right, the triangular hole left side opening is large, after the pressure in the connecting box is reduced, the gas in the rectangular plate can be quickly discharged through the left side triangular hole, thereby the sensitivity of the connecting plate moving to the left can be increased.

[0022] Further preferably, the bottom of the circular pipe is fixedly connected with a vertical block, the outer side of the circular pipe is slidably sleeved with a circular ring scribble plate, the right side of the vertical block is fixedly connected with a second electric telescopic rod, the bottom of the circular ring scribble plate is fixedly connected with a connecting block, and the output end of the second electric telescopic rod is fixedly connected with the left side of the connecting block.

[0023] Further preferably, the left side of the rectangular plate is fixedly connected with a scribble pen, the left end of the scribble pen extends to the left side of the connecting box, and the connecting box is slidably sleeved on the outer side of the scribble pen; when the weld joint has a gap, the scribble pen can move to the left to mark on the circular ring scribble plate.

[0024] Under the action of the wind, the rectangular plate moves to the right, the rectangular plate drives the scribble pen to move to the right, and the rectangular plate moves to a suitable position and remains stable; the second electric telescopic rod is started, the connecting block is driven to work by the second electric telescopic rod, the connecting block drives the circular ring scribble plate to move to the left side of the scribble pen, and the wind generated by the fan is discharged through the gap between the two semicircular ring blocks when the weld joint has a small hole or gap; at this time, the amount of wind discharged into the connecting box through the circular pipe is reduced, the spring in the compressed state is reset, the spring force drives the rectangular plate to move to the left, the rectangular plate drives the scribble pen to move to the left and mark on the right side of the circular ring scribble plate; at this time, the rotating speed of the circular ring scribble plate is the same as that of the excavator accessory, that is, the scribble position on the right side of the circular ring scribble plate is the hole or gap of the weld joint; and the motor continuously works to continuously mark other holes or gaps of the weld joint.

[0025] When the marking is completed, the laser welding head is started to weld the marked hole or gap of the weld joint; when the welding is completed, the first hydraulic cylinder is started in reverse to separate the semicircular ring block from the excavator accessory, and the second hydraulic cylinder is started in reverse; the laser welding head is driven to move backward by the working of the second hydraulic cylinder; and the excavator accessory after welding is taken out by moving upward.

[0026] The application also provides a laser welding method for small excavator accessories, which comprises the following steps:

[0027] Step 1: the first electric telescopic rod is started to make the sides of the excavator accessories close to each other to be in contact and form a circular weld joint to be welded;

[0028] Step 2: the laser welding head is used to weld the circular weld joint between the two excavator accessories in rotation;

[0029] Step 3: the fan and the motor are started to detect the circular weld joint to check whether there is any missing weld joint;

[0030] Step 4: the scribble pen is moved to the right side of the circular ring scribble plate to make scribble marks.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1. After the pipe or the hollow shell member is welded, the present application can automatically detect and mark the sealing performance of the welded joint in time, and can repair the small holes or gaps in time, so that the stability of the member is ensured, the member is not prone to breakage for a long time, the quality of the member is improved, the first electric telescopic rod is started to drive the two excavator accessories to move and form a circular weld joint, the motor drives the outer gear ring to rotate through the gear, so that the left excavator accessory drives the right excavator accessory, and the laser welding head is used to weld the circular weld joint between the two excavator accessories in rotation.

[0033] 2. The first hydraulic cylinder is started to drive the semicircular ring block to move to form a circular ring block with a notch at the top, and the fan and the motor are started to drive the rectangular plate to move to the right under the action of the wind pressure, the connecting plate is driven to move by the first circular rod to discharge the gas on the right side through the gas compensation pipe, and the spring is stretched in the moving process, when there is a missing weld, the wind generated by the fan is discharged through the notch, the spring force drives the connecting plate to move to the left to discharge the gas between the left side of the connecting plate and the fixed plate through the air outlet valve at the left end of the U-shaped pipe into the storage box, and the ink is sprayed to the right excavator accessory through the material spraying pipe to make marks, and the motor can continuously mark other holes or gaps in the weld joint.

[0034] 3. The rectangular plate drives the scribble pen to move to the right under the action of the wind, and when there is a missing weld, the wind generated by the fan is discharged through the notch, at this time, the amount of wind discharged into the connecting box through the circular pipe is reduced, the spring force drives the scribble pen to move to the left through the rectangular plate to make scribble marks on the right side of the circular ring scribble plate, and the motor can continuously mark other holes or gaps in the weld joint.

[0035] 4. When the marking is completed, the laser welding head is started to weld the marked holes or gaps in the weld joint, and when the welding is completed, the first hydraulic cylinder is started in reverse to separate the semicircular ring block from the excavator accessory, and the second hydraulic cylinder is started in reverse to drive the laser welding head to move backward to take out the welded excavator accessory. Attached Figure Description

[0036] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of the left-side stereoscopic structure of the present invention;

[0038] Figure 3 This is a rear-view three-dimensional structural diagram of the present invention;

[0039] Figure 4 This is a cross-sectional perspective view of the three-dimensional structure of the present invention;

[0040] Figure 5 This is a three-dimensional structural diagram of the second embodiment of the present invention;

[0041] Figure 6 for Figure 1 Enlarged 3D structural diagram of area A in the middle;

[0042] Figure 7 for Figure 1 Schematic diagram of the internal cross-sectional structure of the connecting box;

[0043] Figure 8 This is a schematic diagram of the internal cross-sectional structure of the storage box in this invention;

[0044] Figure 9 for Figure 5 Enlarged 3D structural diagram of area B;

[0045] Figure 10 for Figure 5 A schematic diagram of the internal cross-sectional structure of the connecting box.

[0046] In the picture:

[0047] 1. Base plate; 2. Side plate; 3. Round tube; 31. Connecting box; 32. Triangular hole; 33. Rectangular plate; 34. First round rod; 35. Fixing plate; 36. Connecting plate; 37. Spring; 38. Gas compensation pipe; 39. U-shaped pipe; 310. Storage box; 311. Spray pipe; 312. Vertical block; 313. Circular graffiti board; 314. Second electric telescopic rod; 315. Connecting block; 316. Graffiti pen;

[0048] 4. Support rod; 5. First hydraulic cylinder; 6. Semi-circular ring block; 7. Support plate; 8. Second hydraulic cylinder; 9. L-shaped block; 10. Third hydraulic cylinder; 11. Fan; 12. Laser welding head; 13. Cylinder; 14. Circular plate; 15. Horizontal plate; 16. External gear ring; 17. Motor; 18. Gear; 19. Connecting seat; 20. First electric telescopic rod; 21. Excavator parts. Detailed Implementation

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0050] Embodiment 1, please refer to Figures 1-10 The present application provides a technical solution: a laser welding device for small excavator accessories, the welding device comprising a bottom plate 1, a side plate 2, a laser welding head 12, a cylinder 13 and a circular plate 14;

[0051] The side plate 2 is fixedly installed on the top of the bottom plate 1, the laser welding head 12 is arranged above the bottom plate 1, the two cylinders 13 are rotatably installed at the ends away from each other and the sides close to each other of the two side plates 2 respectively, the outer side of the cylinder 13 is slidably sleeved with the circular plate 14, and the sides close to each other of the two circular plates 14 are both fixedly connected with a horizontal plate 15;

[0052] The welding device further comprises a weld seam closed loop detection mechanism, the weld seam closed loop detection mechanism comprising a circular pipe 3, a fan 11 and a connecting box 31, the fan 11 is fixedly installed on the top of the bottom plate 1, the air outlet end of the fan 11 extends into one of the left cylinders 13, the circular pipe 3 is rotatably installed on the right side of the right side plate 2, the circular pipe 3 is in communication with and fixedly connected with the right cylinder 13, the connecting box 31 is fixedly installed on the top of the bottom plate 1 through a support frame, the outer side of the circular pipe 3 is rotatably connected with the inner side of the connecting box 31, the front inner wall and the rear inner wall of the connecting box 31 are both provided with a triangular hole 32, and the inner side of the connecting box 31 is slidably sleeved with an elastically movable rectangular plate 33, the closed loop condition of the weld seam is obtained by obtaining the position of the rectangular plate 33;

[0053] The welding device further comprises a marking assembly for marking the weld seam gap.

[0054] When the pipe or the hollow shell member is welded, the sealing property of the welded part can be detected and marked in time, the small holes or gaps can be welded and repaired in time, the stability of the member is ensured when the member is used, the member is not easy to break for a long time, and the quality of the member is improved.

[0055] In this embodiment, specifically, the top of the bottom plate 1 is fixedly connected with two support rods 4, the outer side of the support rod 4 is fixedly connected with a first hydraulic cylinder 5, the output end of the first hydraulic cylinder 5 is fixedly connected with a semicircular annular block 6, and the two semicircular annular blocks 6 close together to form a circular annular block with a notch at the top;

[0056] In this embodiment, specifically: the top of the bottom plate 1 is fixedly connected with a support plate 7, the outer side of the support plate 7 is fixedly connected with a second hydraulic cylinder 8, the output end of the second hydraulic cylinder 8 is fixedly connected with an L-shaped block 9, the top inner wall of the L-shaped block 9 is fixedly connected with a third hydraulic cylinder 10, and the output end of the third hydraulic cylinder 10 is fixedly connected with the top of a laser welding head 12.

[0057] In this embodiment, specifically: the top and bottom of the cylinder 13 are fixedly connected with a connecting seat 19, the outer side of the connecting seat 19 is fixedly connected with a first electric telescopic rod 20, the output end of the first electric telescopic rod 20 is fixedly connected with the outer side of the corresponding circular plate 14, and the clamping of the excavator accessory 21 is realized through the movement of the movable end of the first electric telescopic rod 20.

[0058] In this embodiment, specifically: the outer side of the left one of the cylinders 13 is fixedly sleeved with an outer gear ring 16, the left side of the left one of the side plates 2 is fixedly connected with a motor 17, the output end of the motor 17 is fixedly connected with a gear 18, the outer gear ring 16 is engaged with the gear 18, and the rotation of the excavator accessory 21 is realized through the rotation of the motor 17.

[0059] When the excavator accessory 21 is placed on the top of the horizontal plate 15, the first electric telescopic rod 20 is started to drive the circular plate 14 to move, the circular plate 14 slides on the outer side of the cylinder 13, the two circular plates 14 move towards each other and drive the two excavator accessories 21 to move, so that the sides of the excavator accessories 21 close to each other are in contact and form a circular weld seam that needs to be welded, wherein the two excavator accessories 21 need to be concentric with the circular plate 14, then the third hydraulic cylinder 10 is started to drive the laser welding head 12 to move downwards to a suitable position, and the laser welding head 12 and the motor 17 are started, the motor 17 works to drive the gear 18 to rotate, the gear 18 rotates to drive the outer gear ring 16 to rotate, the outer gear ring 16 rotates to drive the left one of the cylinders 13 to rotate, the left one of the cylinders 13 drives the left excavator accessory 21 to rotate through the circular plate 14, and the left excavator accessory 21 drives the right excavator accessory 21, at this time the laser welding head 12 performs welding work on the circular weld seam of the excavator accessories 21 in rotation.

[0060] Specifically in this embodiment, the right side of the rectangular plate 33 is fixedly connected with a first round rod 34, the inner side of the connecting box 31 is fixedly sleeved with a fixed plate 35, the fixed plate 35 is slidably sleeved on the outer side of the first round rod 34, the inner side of the connecting box 31 is slidably sleeved with a connecting plate 36, the right end of the first round rod 34 is fixedly connected with the left side of the connecting plate 36, the fixed plate 35 and the connecting plate 36 are fixedly connected with the same spring 37 which is movably sleeved on the outer side of the first round rod 34, the top right side of the connecting box 31 is communicated and fixed with a gas compensation pipe 38, and the top of the connecting box 31 is communicated and fixed with an air inlet valve located between the fixed plate 35 and the connecting plate 36.

[0061] When the welding is completed, the laser welding head 12 and the motor 17 are closed, the present application can detect the circular weld to detect whether there is a missing point of the weld, when detecting, the first hydraulic cylinder 5 is started in forward direction to drive the semicircular ring block 6 to move, the two semicircular ring blocks 6 wrap the circular weld and form a circular ring block with a notch at the top at the same time, the fan 11 and the motor 17 are started at the same time, the wind generated by the fan 11 passes through the left cylinder 13, the excavator accessory 21, the right cylinder 13 and the circular pipe 3 in sequence and enters into the connecting box 31, at this time, the rectangular plate 33 is driven to move rightwards under the action of the wind pressure, the rectangular plate 33 drives the connecting plate 36 to move through the first round rod 34, the connecting plate 36 makes the external gas pass through the air inlet valve and enter into the area between the connecting plate 36 and the fixed plate 35 in the moving process, the connecting plate 36 drives the gas on the right side to pass through the gas compensation pipe 38 and discharge, and the connecting plate 36 stretches the spring 37 in the moving process.

[0062] Specifically in this embodiment, the top of the bottom plate 1 is fixedly installed with a storage box 310 with pigments inside, the bottom of the connecting box 31 and the right top of the storage box 310 are communicated and fixed with the same U-shaped pipe 39, the left top end of the U-shaped pipe 39 is communicated and fixed with an air outlet valve, the right top end of the U-shaped pipe 39 is located between the fixed plate 35 and the connecting plate 36, the right top of the U-shaped pipe 39 is communicated with the cavity between the fixed plate 35 and the connecting plate 36, the top of the storage box 310 is communicated and fixed with a material spraying pipe 311, the top end of the material spraying pipe 311 is communicated with a spray head, the bottom end of the material spraying pipe 311 extends to the inner bottom of the storage box 310, and the left side of the storage box 310 is communicated and fixed with an L-shaped feeding pipe, when the weld has a notch, the storage box 310 increases the internal pressure when the connecting plate 36 moves leftwards, and the pigments in the storage box 310 are sprayed out through the spray head to realize the marking of the weld notch;

[0063] In the case of the fan 11 produces constant wind pressure, the rectangular plate 33 in the process of moving to the right, the range of the triangular hole 32 exposed on the left side of the rectangular plate 33 becomes larger, the excess pressure in the connecting box 31 is discharged through the triangular hole 32 on the left side of the rectangular plate 33, and at the same time, the spring 37 in the stretched state is jointly acted, so that the rectangular plate 33 moves to the middle position of the triangular hole 32 and keeps stable. Similarly, the motor 17 works to drive the excavator accessory 21 to rotate slowly. When the welding appears the situation of leakage, the wind generated by the fan 11 is discharged through the gap formed by the two semicircular ring blocks 6 through the small holes or gaps existing in the welding points. At this time, the amount of wind discharged into the connecting box 31 through the circular pipe 3 is reduced, resulting in a decrease in the pressure in the connecting box 31. Under the action of the spring 37 in the stretched state, the spring force of the spring 37 drives the connecting plate 36 to move to the left. The connecting plate 36 can drive the rectangular plate 33 to move to the left through the first circular rod 34. In the process of moving, the connecting plate 36 discharges the gas between its left side and the fixed plate 35 into the storage box 310 through the air outlet valve at the left end of the U-shaped tube 39, thereby increasing the pressure in the storage box 310. The ink in the storage box 310 is sprayed out through the spray pipe 311 to the right of one excavator accessory 21 and marked. Similarly, the motor 17 can continuously work to continuously mark other holes or gaps in the welding seam.

[0064] Among them, because the triangular hole 32 is gradually reduced from left to right, the left side of the triangular hole 32 is large, and after the pressure in the connecting box 31 is reduced, the gas in the rectangular plate 33 can be quickly discharged through the left side of the triangular hole 32 exposed, thereby increasing the sensitivity of the connecting plate 36 moving to the left.

[0065] In this embodiment, the specific implementation is as follows: Figures 1-3 、 Figure 6 、 Figure 9 and Figure 10 In this embodiment, specifically: the bottom of the circular pipe 3 is fixedly connected with a vertical block 312, the outer side of the circular pipe 3 is slidably sleeved with a circular ring scribble plate 313, the right side of the vertical block 312 is fixedly connected with a second electric telescopic rod 314, the bottom of the circular ring scribble plate 313 is fixedly connected with a connecting block 315, and the output end of the second electric telescopic rod 314 is fixedly connected with the left side of the connecting block 315.

[0066] In this embodiment, specifically: the left side of the rectangular plate 33 is fixedly connected with a scribble pen 316, the left end of the scribble pen 316 extends to the left side of the connecting box 31, and the connecting box 31 is slidably sleeved on the outer side of the scribble pen 316. When the welding seam has a gap, the scribble pen 316 can move left on the circular ring scribble plate 313 to mark;

[0067] Under the action of the wind, the rectangular plate 33 moves to the right, the rectangular plate 33 drives the graffiti pen 316 to move to the right, and the same reason, the rectangular plate 33 moves to the appropriate position and keeps stable, the second electric telescopic rod 314 is started, the second electric telescopic rod 314 drives the connecting block 315 to work, the connecting block 315 drives the circular ring graffiti plate 313 to move to the left side of the position of the graffiti pen 316, and the same reason, when the welding is missing, the wind generated by the fan 11 passes through the small holes or gaps in the welding points and is discharged through the gap formed by the two semicircular ring blocks 6, at this time, the amount of wind discharged into the connecting box 31 through the circular pipe 3 is reduced, at this time, the spring 37 in the compressed state resets, the elastic force of the spring 37 drives the rectangular plate 33 to move to the left, the rectangular plate 33 drives the graffiti pen 316 to move to the left and mark on the right side of the circular ring graffiti plate 313, at this time, the rotating speed of the circular ring graffiti plate 313 is the same as that of the excavator accessory 21, that is, the position of the right side of the circular ring graffiti plate 313 is the hole or gap of the weld, and the same reason, the continuous work of the motor 17 can continuously mark other holes or gaps of the weld.

[0068] When the marking is completed, the laser welding head 12 is started to weld the marked holes or gaps of the weld, and when the welding is completed, the first hydraulic cylinder 5 is started in reverse to drive the semicircular ring block 6 to separate from the excavator accessory 21, and the second hydraulic cylinder 8 is started in reverse, the second hydraulic cylinder 8 drives the laser welding head 12 to move backward, at this time, the excavator accessory 21 is moved upward, and the excavator accessory 21 after welding is taken out.

[0069] The application also provides a laser welding method for small excavator accessories, which comprises the following steps:

[0070] Step 1: the first electric telescopic rod 20 is started to make the sides of the excavator accessories 21 close to each other and contact to form a circular weld seam that needs to be welded;

[0071] Step 2: the laser welding head 12 is used to weld the circular weld seam of the contacting excavator accessories 21 in rotation;

[0072] Step 3: the fan 11 and the motor 17 are started to detect the circular weld seam and detect whether there are missing points of the weld seam;

[0073] Step 4: the graffiti pen 316 is moved to mark on the right side of the circular ring graffiti plate 313.

[0074] Although the embodiments of the application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the application, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A laser welding apparatus for small excavator accessories, characterized by: The welding device includes a base plate (1), a side plate (2), a laser welding head (12), a cylinder (13), and a circular plate (14). The side plate (2) is fixedly installed on the top of the base plate (1), the laser welding head (12) is set above the base plate (1), the two cylinders (13) are rotatably installed at the ends that are far apart from each other and the two side plates (2) that are close to each other respectively, and a circular plate (14) is slidably sleeved on the outer side of the cylinder (13), and a horizontal plate (15) is fixedly connected to the side that is close to each other of the two circular plates (14). The welding device also includes a weld closed-loop detection mechanism, which includes a circular tube (3), a fan (11), and a connecting box (31). The fan (11) is fixedly installed on the top of the base plate (1). The air outlet of the fan (11) extends into a cylinder (13) on the left side. The circular tube (3) is rotatably installed on the right side of a side plate (2) on the right side. The circular tube (3) is connected and fixedly connected to the cylinder (13) on the right side. The connecting box (31) is fixedly installed on the top of the base plate (1) by a support frame. The outer side of the circular tube (3) is rotatably connected to the inner side of the connecting box (31). Triangular holes (32) are provided on the front inner wall and the rear inner wall of the connecting box (31). A rectangular plate (33) that can move elastically is slidably fitted on the inner side of the connecting box (31). The closed-loop status of the weld is obtained by obtaining the position of the rectangular plate (33). The welding device also includes a marking assembly for marking the weld notch; two support rods (4) are fixedly connected to the top of the base plate (1), and a first hydraulic cylinder (5) is fixedly connected to the outer side of the support rods (4). A semi-circular ring block (6) is fixedly connected to the output end of the first hydraulic cylinder (5). The two semi-circular ring blocks (6) can be brought together to form a circular ring block with a notch at the top; a first round rod (34) is fixedly connected to the right side of the rectangular plate (33), and a fixing plate (35) is fixedly sleeved on the inner side of the connecting box (31). 5) The connecting box (31) is slidably sleeved on the outside of the first round rod (34), and the connecting plate (36) is slidably sleeved on the inside of the connecting box (31). The right end of the first round rod (34) is fixedly connected to the left side of the connecting plate (36). The fixing plate (35) and the connecting plate (36) are fixedly connected to the same spring (37) movably sleeved on the outside of the first round rod (34). The top right side of the connecting box (31) is connected to and fixed with a gas compensation pipe (38). The top of the connecting box (31) is connected to and fixed with an air intake valve located between the fixing plate (35) and the connecting plate (36).

2. The laser welding apparatus for compact excavator accessories according to claim 1, characterized by: A support plate (7) is fixedly connected to the top of the base plate (1), and a second hydraulic cylinder (8) is fixedly connected to the outer side of the support plate (7). An L-shaped block (9) is fixedly connected to the output end of the second hydraulic cylinder (8), and a third hydraulic cylinder (10) is fixedly connected to the inner wall of the top of the L-shaped block (9). The output end of the third hydraulic cylinder (10) is fixedly connected to the top of the laser welding head (12).

3. The laser welding device for mini excavator parts according to claim 2, characterized in that: The top and bottom of the cylinder (13) are fixedly connected to a connecting seat (19), and the outer side of the connecting seat (19) is fixedly connected to a first electric telescopic rod (20). The output end of the first electric telescopic rod (20) is fixedly connected to the outer side of the corresponding circular plate (14). The excavator parts (21) are clamped by the movement of the movable end of the first electric telescopic rod (20).

4. The laser welding device for mini excavator parts according to claim 3, characterized in that: An external gear ring (16) is fixedly sleeved on the outer side of one of the cylinders (13) on the left side, and a motor (17) is fixedly connected to the left side of one of the side plates (2) on the left side. A gear (18) is fixedly connected to the output end of the motor (17). The external gear ring (16) meshes with the gear (18), and the rotation of the excavator accessory (21) is realized by the rotation of the motor (17).

5. The laser welding device for mini excavator parts according to claim 4, characterized in that: A storage box (310) containing pigment is fixedly installed on the top of the base plate (1). The bottom of the connecting box (31) is connected to the top right side of the storage box (310) and a U-shaped tube (39) is fixedly connected to it. An air vent valve is connected to and fixed on the top left side of the U-shaped tube (39). The top right side of the U-shaped tube (39) is located between the fixed plate (35) and the connecting plate (36). The chamber between the top right side of the U-shaped tube (39) and the fixed plate (35) and the connecting plate (36) The top of the storage box (310) is connected to and fixed with a spray pipe (311), the top of the spray pipe (311) is connected to a nozzle, the bottom of the spray pipe (311) extends to the bottom of the inner side of the storage box (310), and the left side of the storage box (310) is connected to and fixed with an L-shaped feeding pipe. When there is a gap in the weld, when the connecting plate (36) moves to the left, the internal pressure of the storage box (310) increases, and the pigment in the storage box (310) is sprayed out by the nozzle to mark the gap in the weld.

6. The laser welding device for mini excavator parts according to claim 5, characterized in that: A vertical block (312) is fixedly connected to the bottom of the circular tube (3), and a circular graffiti board (313) is slidably sleeved on the outside of the circular tube (3). A second electric telescopic rod (314) is fixedly connected to the right side of the vertical block (312), and a connecting block (315) is fixedly connected to the bottom of the circular graffiti board (313). The output end of the second electric telescopic rod (314) is fixedly connected to the left side of the connecting block (315).

7. The laser welding device for mini excavator parts according to claim 6, characterized in that: A graffiti pen (316) is fixedly connected to the left side of the rectangular plate (33). The left end of the graffiti pen (316) extends to the left side of the connecting box (31). The connecting box (31) is slidably fitted on the outside of the graffiti pen (316). When there is a gap in the weld, the graffiti pen (316) can move to the left to mark on the circular graffiti plate (313).

8. A laser welding method for mini excavator parts, characterized in that, The steps of using the laser welding apparatus for mini excavator parts as described in claim 7 are as follows: Step 1: By activating the first electric telescopic rod (20), the excavator parts (21) are brought into contact on their closest sides and form a circular weld that needs to be welded. Step 2: The laser welding head (12) performs welding operations on the circular weld seam that contacts the rotating excavator parts (21); Step 3: Start the fan (11) and motor (17) to inspect the circular weld and check for any leaks in the weld; Step 4: Use the graffiti pen (316) to make graffiti marks on the right side of the circular graffiti board (317).

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