Welding robot for excavator assembly

Abstract

The invention relates to the technical field of excavator cab door frame welding, in particular to an excavator assembly welding robot which comprises a support table, an outer frame fixedly connected to the upper portion of the support table and a welding mechanical arm installed on the side portion of the support table. A first self-clamping assembly used for automatically centering, adjusting, clamping and limiting an excavator door frame vertical beam is arranged in the middle of the upper end face of the support, and a second self-clamping assembly used for automatically centering, adjusting and clamping an excavator door frame cross beam is arranged on the rear portion of the support. A linkage assembly used for sequentially triggering the moving assembly, the second self-clamping assembly and the first self-clamping assembly to operate so that a vertical supporting column, a cross beam, a vertical beam and an L-shaped supporting column section in an excavator door frame can be spliced together is jointly arranged between the support and the pushing assembly. Rapid and accurate splicing and undisturbed turn-over welding of the door frame component of the excavator are achieved through a linkage clamping and overall turn-over structure, the splicing size consistency and welding precision are remarkably improved, and meanwhile the welding efficiency and the process continuity are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding of the door frame of an excavator cab, and particularly to a welding robot for excavator components. Background Art

[0002] The excavator cab is a key man-machine interaction structure in the whole machine. It not only provides an operating environment for the operator, but also plays a protective role. To meet the safety, comfort and durability requirements during operation, the cab is usually welded by high-strength steel components. Among them, the door frame, as an important part of the cab, is not only used to install components such as doors, windows, and locks, but also directly participates in the overall structural load-bearing and lateral protection functions of the cab. Its structural stability has a direct impact on the safety of the whole vehicle; the basic structure of the door frame consists of multiple outer frame pillars and beams (i.e., horizontal and vertical structural members). Most of these components are made of high-strength thin-walled rectangular tubes or bent profiles. To improve the structural strength and torsional resistance, the door frame needs to connect these pillars and beams into a closed frame structure by welding. Before welding, it is necessary to accurately splice and position and limit the clamping of each pillar and beam in the door frame to ensure that the angles, dimensions and joint positions between components meet the design requirements during welding, so as to control the overall dimensional deviation and welding deformation.

[0003] At present, most of the splicing methods of the door frame adopt the method of "sequentially splicing one by one", that is, first position and spot-weld two adjacent pillars or beams in the fixture, and then splice the next component, and so on until the complete door frame is formed. Since the positions of each component in space are scattered and the directions are different, each time a new component is spliced, it is necessary to manually adjust the fixture or reposition the original fixture to adapt to the clamping requirements of different parts. This method is cumbersome to operate, has low positioning efficiency, and has a high dependence on the proficiency of operators in mass production, affecting production efficiency and dimensional consistency.

[0004] In addition, to complete the preliminary splicing and positioning, these pillars and beams are usually horizontally placed on the processing table for assembly. After the door frame is assembled, the lower surface (the part in contact with the processing table) cannot be directly welded. To achieve complete welding, the operator needs to manually loosen the fixture, flip the entire door frame, and fix it on the fixture again to weld the other side. This process not only increases the risk of secondary positioning error, but also affects the welding speed. More seriously, quality problems such as insecure clamping, door frame deformation, and weld misalignment may occur during the flipping process. Summary of the Invention

[0005] The present invention provides a welding robot for excavator components, which solves the technical problems that when welding the door frame of an excavator, each pillar and beam need to be spot-welded at a fixed point one by one in a fixture. Since the spatial positions of the components are scattered and the directions are different, the fixture needs to be frequently adjusted manually or replaced during the splicing process. In addition, the splicing is usually carried out on a horizontal processing table, and the lower surface of the door frame cannot be welded after the assembly is completed, and it needs to be manually flipped and re-clamped, which increases the secondary positioning error and operation time, and is likely to cause quality problems such as unstable clamping, structural deformation and weld misalignment.

[0006] A welding robot for excavator components provided by the present invention includes a support table, an outer frame fixedly connected to the upper part of the support table, and a welding manipulator installed on the side of the support table. A bearing frame is rotatably arranged in the outer frame through a flipping part, and a synchronous splicing part for quickly positioning and butting together the scattered beams and columns in the excavator door frame is installed on the bearing frame. The synchronous splicing part includes a support fixed between the left and right opposite sides of the bearing frame. A placing component for placing the L-shaped pillar section in the excavator door frame is jointly arranged between the support and the bearing frame. A displacement component for placing the vertical pillar of the excavator door frame is arranged at the right part of the upper end surface of the support. A pushing component for placing the horizontal pillar of the excavator door frame is arranged on the front cavity wall of the bearing frame. A self-clamping component one for automatically centering and clamping and limiting the vertical beam of the excavator door frame is arranged in the middle of the upper end surface of the support. A self-clamping component two for automatically centering and clamping the cross beam of the excavator door frame is arranged at the rear part of the support. A linkage component for sequentially triggering the displacement component, the self-clamping component two and the self-clamping component one to operate so as to splice the vertical pillar, cross beam, vertical beam and L-shaped pillar section in the excavator door frame together is jointly arranged between the support and the pushing component.

[0007] In a possible implementation manner, the pushing component includes an electric telescopic rod fixedly connected to the front cavity wall of the bearing frame. A support plate is fixedly connected to the rear end of the electric telescopic rod. Two U-shaped seats are symmetrically fixedly connected to the rear end surface of the support plate. A push plate is slidably connected to the front cavity wall of the U-shaped seat through a spring telescopic rod.

[0008] In a possible implementation manner, the self-clamping component one includes two chutes symmetrically opened on the upper end surface of the support, and two rows of chutes are symmetrically arranged in the front and rear. Sliders are slidably connected in the chutes. A top spring one is jointly fixedly connected between the slider and the chute. The upper end surfaces of the adjacent sliders in the front and rear are jointly fixedly connected with an L-shaped clamping plate one.

[0009] In a possible implementation, the second self-clamping component includes two mounting plates fixedly connected to the rear end face of the support symmetrically left and right. The upper end faces of the two mounting plates are fixedly connected with mounting seats through fixing blocks. Two symmetrically left and right through holes are formed in the mounting seats. Slide columns are symmetrically slidably connected back and forth in the through holes. A limiting spring is fixedly connected between two adjacent slide columns front and back. The ends of two adjacent slide columns on the left and right of the mounting seat away from the mounting seat are fixedly connected with an L-shaped clamping plate two. A bidirectional telescopic rod is hinged to the lower end face of the mounting seat, and the end parts of the bidirectional telescopic rod are respectively hinged to the lower end face of the L-shaped clamping plate two.

[0010] In a possible implementation, the displacement component includes a sliding groove formed in the right part of the support. A U-shaped placement frame is slidably connected to the sliding groove. A return spring is fixedly connected between the sliding groove and the U-shaped placement frame.

[0011] In a possible implementation, the linkage component includes a top rod, a limiting groove, a strip-shaped top plate, an embedding groove and a wedge block one. The rear end faces of the two U-shaped seats are fixedly connected with top rods. A limiting groove for cooperating with the L-shaped clamping plate two is formed in the rear end face of the top rod. Strip-shaped top plates are fixedly connected to the opposite sides of the two L-shaped clamping plates one. Embedding grooves are formed in the opposite sides of the two top rods. Sliding plates are slidably connected in the embedding grooves. A second top spring is fixedly connected between the sliding plate and the embedding groove. Wedge blocks one for cooperating with the strip-shaped top plates are fixedly connected to the opposite sides of the two sliding plates.

[0012] In a possible implementation, an L-shaped shifting rod fixedly connected to the lower end face of the U-shaped placement frame slidably penetrates through the sliding groove. A shifting column is fixedly connected to the lower end face of the horizontal section of the L-shaped shifting rod. A wedge block two for cooperating with the shifting column is fixedly connected to the lower end face of the top rod on the right through a connecting rod.

[0013] In a possible implementation, the placement component includes a U-shaped frame fixedly connected to the left part of the upper end face of the support and a C-shaped frame fixedly connected to the rear cavity wall of the bearing frame.

[0014] In a possible implementation, the flipping part includes two rotating shafts respectively penetrating and rotatably connected to the front and rear wall plates of the outer frame. A driving motor is fixedly connected to the front end face of the outer frame through a connecting frame. The output shaft of the driving motor is fixedly connected to the end of the rotating shaft at the front. The bearing frame is fixedly connected between the two rotating shafts. Positioning columns are symmetrically fixedly connected to the front end face of the bearing frame. Two through grooves for the positioning columns to slide through are symmetrically formed in the front cavity wall of the outer frame. Two C-shaped clamping frames extending into the through grooves for cooperating with the positioning columns are slidably penetrated and connected to the left and right sides of the outer frame, and the two C-shaped clamping frames are symmetrically distributed left and right.

[0015] In a possible implementation, limit blocks are fixedly connected to the opposite ends of two adjacent sliding columns, and two limit rings for cooperating with the limit blocks are fixedly connected symmetrically before and after on the inner wall of the through hole.

[0016] As can be seen from the above technical solutions, the present invention has the following advantages:

[0017] In the present invention, through the linkage components in the synchronous splicing part, the placement component, the displacement component, the self-clamping component one, the self-clamping component two and the pushing component cooperate with each other to run, clamping the various components in the excavator door frame one after another and quickly splicing them together integrally, so that the placement, clamping and splicing processes of all components are completed sequentially within a unified operation, effectively avoiding the problem of repeated positioning errors caused by multiple disassembly and assembly of the fixture, and improving the dimensional consistency and welding fitting accuracy of the door frame finished product.

[0018] In the present invention, through the flipping part, the excavator door frame clamped by the synchronous splicing part and welded on one side is controlled to be flipped integrally, so as to perform welding treatment on the other side, enabling the door frame to be flipped integrally while maintaining the initial clamping state, avoiding the positioning errors and structural cumulative deviations caused by reinstalling the fixture, ensuring that the double-sided welding can be carried out under the same reference coordinate system, further improving the welding dimensional accuracy, and at the same time greatly reducing the downtime, operation switching and repositioning time during the flipping process of the door frame, and making the welding process more continuous. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the welding robot for the excavator assembly provided by the present invention.

[0021] Figure 2 It is a schematic structural diagram of the connection structure between the outer frame and the bearing frame provided by the present invention.

[0022] Figure 3 It is a schematic installation structure diagram of the synchronous splicing part provided by the present invention.

[0023] Figure 4 Provided by the present invention Figure 3 The enlarged schematic diagram of part A in

[0024] Figure 5 It is a schematic installation structure diagram of the synchronous splicing part from the bottom view perspective provided by the present invention.

[0025] Figure 6 Provided by the present invention Figure 5 Schematic enlarged view of part B in

[0026] Figure 7 Schematic cross-sectional view of the connection structure between the sliding column and the mounting seat provided by the present invention from a bottom view perspective

[0027] Figure 8 Schematic placement view of the excavator door frame placed in the synchronous splicing part

[0028] Figure 9 Schematic cross-sectional view of the rear view perspective of the flipping part provided by the present invention

[0029] Figure 10 Shape diagram of the excavator door frame

[0030] Among them, the above-mentioned drawings include the following reference numerals:

[0031] 1. Bracket platform; 2. Outer frame; 3. Welding manipulator; 4. Carrying frame; 5. Synchronous splicing part; 51. Support; 52. Placing component; 521. U-shaped frame; 522. C-shaped frame; 53. Displacement component; 531. Sliding groove; 532. U-shaped placing frame; 54. Pushing component; 541. Electric telescopic rod; 542. Support plate; 543. U-shaped seat; 544. Pushing plate; 55. Self-clamping component one; 551. Chute; 552. L-shaped clamping plate one; 56. Self-clamping component two; 561. Mounting plate; 562. Mounting seat; 563. Through hole; 564. Sliding column; 565. L-shaped clamping plate two; 566. Bi-directional telescopic rod; 57. Linkage component; 571. Thrust rod; 572. Limiting groove; 573. Strip-shaped top plate; 574. Embedding groove; 575. Wedge-shaped block one; 576. Slide plate; 577. L-shaped lever; 578. Pushing column; 579. Wedge-shaped block two; 6. Flipping part; 61. Rotating shaft; 62. Driving motor; 63. Positioning column; 64. Through slot; 65. C-shaped clamping frame; 7. Limiting block; 8. Limiting ring. Detailed implementation manners

[0032] To make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0033] Please refer to Figure 1, the present invention provides a technical solution: an excavator component welding robot, including a support platform 1, an outer frame 2 fixedly connected to the upper part of the support platform 1, and a welding robotic arm 3 installed on the side of the support platform 1. A bearing frame 4 is rotatably arranged in the outer frame 2 through a flipping part 6, and a synchronous splicing part 5 for quickly positioning and butting together the scattered beam columns in the excavator door frame is installed on the bearing frame 4.

[0034] Please refer to Figure 2 and Figure 3 , in this embodiment, the synchronous splicing part 5 includes a support 51 fixedly connected between the left and right opposite sides of the bearing frame 4. A placement component 52 for placing the L-shaped pillar section in the excavator door frame is jointly arranged between the support 51 and the bearing frame 4. A displacement component 53 for placing the vertical pillar of the excavator door frame is arranged on the right part of the upper end face of the support 51. A pushing component 54 for placing the horizontal pillar of the excavator door frame is arranged on the front cavity wall of the bearing frame 4. An automatic centering and clamping component one 55 for automatically centering and clamping the vertical beam of the excavator door frame is arranged in the middle of the upper end face of the support 51. An automatic centering and clamping component two 56 for automatically centering and clamping the cross beam of the excavator door frame is arranged at the rear of the support 51. A linkage component 57 for sequentially triggering the operation of the displacement component 53, the automatic centering and clamping component two 56, and the automatic centering and clamping component one 55 to splice the vertical pillar, cross beam, vertical beam, and L-shaped pillar section in the excavator door frame together is jointly arranged between the support 51 and the pushing component 54.

[0035] Please refer to Figure 2 , the placement component 52 includes a U-shaped frame 521 fixedly connected to the left part of the upper end face of the support 51 and a C-shaped frame 522 fixedly connected to the rear cavity wall of the bearing frame 4.

[0036] Please refer to Figure 2 and Figure 3 , the pushing component 54 includes an electric telescopic rod 541 fixedly connected to the front cavity wall of the bearing frame 4. A support plate 542 is fixedly connected to the rear end of the electric telescopic rod 541. Two U-shaped seats 543 are symmetrically fixedly connected to the rear end face of the support plate 542. A push plate 544 is slidably connected to the front cavity wall of the U-shaped seat 543 through a spring telescopic rod.

[0037] Please refer to Figure 3 and Figure 4 , the automatic centering and clamping component one 55 includes two chutes 551 symmetrically opened on the upper end face of the support 51, and two rows of chutes 551 are symmetrically arranged front and back. Sliders are slidably connected in the chutes 551. A top spring one (not shown in the figure) is jointly fixedly connected between the slider and the chute 551. The upper end faces of the adjacent front and back sliders are jointly fixedly connected with an L-shaped clamping plate one 552.

[0038] Please refer to Figure 2 , Figure 3 , Figure 5 , Figure 6And Figure 7 The self-clamping component II 56 includes two mounting plates 561 that are symmetrically and fixedly connected to the rear end face of the support 51 from left to right. The upper end faces of the two mounting plates 561 are both fixedly connected with mounting seats 562 through fixing blocks. Two symmetrically arranged through holes 563 are formed in the mounting seats 562. Slide columns 564 are symmetrically and slidably connected in the front and rear directions in the through holes 563. A limiting spring is fixedly connected between two adjacent slide columns 564 in the front and rear directions. The ends of two adjacent slide columns 564 on the left and right of the mounting seat 562 away from the mounting seat 562 are fixedly connected with an L-shaped clamping plate II 565 together. The lower end face of the mounting seat 562 is hinged with a bidirectional telescopic rod 566. The ends of the bidirectional telescopic rod 566 are respectively hinged to the lower end face of the L-shaped clamping plate II 565. Limiting blocks 7 are fixedly connected to the opposite ends of two adjacent slide columns 564 in the front and rear directions. Two limiting rings 8 for cooperating with the limiting blocks 7 are symmetrically and fixedly connected to the inner wall of the through hole 563 in the front and rear directions. When the slide column 564 drives the limiting block 7 to slide in the through hole 563, the movement stroke of the limiting block 7 is limited by the limiting ring 8 to prevent the slide column 564 from falling off the through hole 563.

[0039] Please refer to Figure 2 And Figure 3 The displacement component 53 includes a sliding groove 531 formed in the right part of the support 51. A U-shaped placement frame 532 is slidably connected to the sliding groove 531. A return spring is fixedly connected between the sliding groove 531 and the U-shaped placement frame 532.

[0040] Please refer to Figure 3 、 Figure 4 And Figure 5 The linkage component 57 includes a top rod 571, a limiting groove 572, a strip-shaped top plate 573, an embedding groove 574 and a wedge-shaped block I 575. The rear end faces of the two U-shaped seats 543 are both fixedly connected with a top rod 571. A limiting groove 572 for cooperating with the L-shaped clamping plate II 565 is formed in the rear end face of the top rod 571. Strip-shaped top plates 573 are fixedly connected to the opposite sides of the two L-shaped clamping plates I 552. Embedding grooves 574 are formed in the opposite sides of the two top rods 571. Slide plates 576 are slidably connected in the embedding grooves 574. A second top spring is fixedly connected between the slide plate 576 and the embedding groove 574. Wedge-shaped blocks I 575 for cooperating with the strip-shaped top plates 573 are fixedly connected to the opposite sides of the two slide plates 576. The lower end face of the U-shaped placement frame 532 is fixedly connected with an L-shaped lever 577 that slidably penetrates the sliding groove 531. A dial post 578 is fixedly connected to the lower end face of the horizontal section of the L-shaped lever 577. A wedge-shaped block II 579 for cooperating with the dial post 578 is fixedly connected to the lower end face of the top rod 571 on the right through a connecting rod.

[0041] Refer to Figure 2 And Figure 10, first place the L-shaped strut section a in the excavator door frame into the U-shaped frame 521, then manually push the L-shaped strut section backward so that the horizontal section of the L-shaped strut section slides into the C-shaped frame 522. Next, place the vertical strut b into the U-shaped placement frame 532, and adjust the position of the vertical strut so that its rear end side is flush with the rear end face of the L-shaped strut section. Then, place the cross beam e between the adjacent front and rear L-shaped clamping plates two 565 of the self-clamping component two 56. Next, place the vertical beam d between the two L-shaped clamping plates one 552 of the self-clamping component. Finally, place the last component of the excavator door frame assembly, the horizontal strut c, onto the U-shaped seat 543, and use the spring telescopic rod to push the push plate 544 to touch the front side of the horizontal strut.

[0042] Then control the electric telescopic rod 541 to extend and push the support plate 542 to move backward. The support plate 542 then drives the horizontal strut to move backward through the U-shaped seat 543 until the horizontal strut touches the front end of the L-shaped strut section. The support plate 542 continues to drive the U-shaped seat 543 to move backward, thereby pushing the spring telescopic rod to contract. The U-shaped seat 543 drives the ejector rod 571 to continue moving backward. The ejector rod 571 then drives the wedge block two 579 to move backward through the connecting rod. During the backward movement of the wedge block two 579, its inclined surface squeezes the dialing post 578 to move leftward. The dialing post 578 then drives the U-shaped placement frame 532 to move through the L-shaped dialing rod 577. The U-shaped placement frame 532 then drives the vertical strut to move until the vertical strut moves leftward and touches the right end of the L-shaped strut section. At this time, the left side surface of the wedge block two 579 always touches the left end of the sliding column 564 to ensure that the vertical strut tightly touches the right end of the L-shaped strut section.

[0043] Then, the ejector rod 571 continues to move backward. When the ejector rod 571 moves backward a certain distance, it drives the inclined surface of the wedge block one 575 to touch the strip-shaped top plate 573 through the embedding groove 574 and the sliding plate 576, and drives the wedge block one 575 to move backward synchronously. The inclined surface of the wedge block one 575 will squeeze the two strip-shaped top plates 573 to move closer to each other. The strip-shaped top plates 573 then drive the two L-shaped clamping plates one 552 to move closer to each other. The L-shaped clamping plates one 552 automatically adjust the position of the vertical beam so that the front end touches the rear side of the horizontal strut and clamp the vertical beam.

[0044] The ejector rod 571 moves backward by a certain distance, and its rear end abuts against the transverse section of the L-shaped clamping plate two 565 located at the front. At this time, the wedge block one 575 pauses to press against the strip-shaped top plate 573. During the continuous backward movement of the ejector rod 571, the wedge block one 575 drives the slide plate 576 to gradually retract into the embedding groove 574. The ejector rod 571 moves backward to push the L-shaped clamping plate two 565 located at the front backward. The L-shaped clamping plate two 565 drives the sliding column 564 connected to it to slide in the through hole 563. At the same time, the L-shaped clamping plate two 565 will also drive the double telescopic rod 566 to rotate. The double telescopic rod 566 then drives the L-shaped clamping plate two 565 located at the rear to move forward. During the process of the front and rear two L-shaped clamping plates two 565 moving closer to each other, the position of the cross beam is automatically adjusted to a horizontal and straight state, so that the two ends of the cross beam respectively abut against the opposite sides of the L-shaped column section and the vertical column section. At the same time, the front side of the cross beam abuts against the rear end of the vertical beam. At this time, the cross beam is clamped.

[0045] Subsequently, the operation of the welding robot arm 3 can be controlled to weld the column beams of the spliced door frame together. After welding the upper side of the door frame, by controlling the operation of the flipping part 6, the bearing frame 4 is flipped 180 degrees. Then, the operation of the welding robot arm 3 can be controlled again to weld the other side of the door frame. After the door frame is completely welded and formed, by controlling the flipping part 6 to drive the bearing frame 4 to flip back to the initial position. Finally, control the electric telescopic rod 541 to contract to pull the support plate 542 forward. The support plate 542 then pulls the ejector rod 571 forward through the U-shaped seat 543. The forward movement of the ejector rod 571 drives the wedge block one 575 and the wedge block two 579 forward. The forward movement of the wedge block one 575 causes the self-clamping component one 55 to release the vertical beam. The forward movement of the wedge block two 579 releases the pulling force on the dialing rod 578. However, the U-shaped placement frame 532 still stays in place. At the same time, the ejector rod 571 also releases the pressing force on the L-shaped clamping plate two 565, so that the self-clamping component two 56 releases the cross beam. Then manually push the formed door frame forward to move the rear transverse section of the door frame out of the C-shaped frame 522. Then lift the door frame upward to move it out of the U-shaped frame 521, and the welded and formed door frame can be taken off.

[0046] Please refer to Figure 2 、 Figure 3 and Figure 9 In this embodiment, the flipping part 6 includes two rotating shafts 61 respectively penetrating and rotatably connected to the front and rear wall plates of the outer frame 2. The front end face of the outer frame 2 is fixedly connected with a driving motor 62 through a connecting frame. The output shaft of the driving motor 62 is fixedly connected to the end of the rotating shaft 61 located at the front. The bearing frame 4 is fixedly connected between the two rotating shafts 61. The front end face of the bearing frame 4 is symmetrically fixedly connected with positioning columns 63 on the left and right. The front cavity wall of the outer frame 2 is symmetrically provided with two through grooves 64 for the positioning columns 63 to slide through. Both the left and right sides of the outer frame 2 are slidably penetrated and connected with two C-shaped clamping frames 65 extending into the through grooves 64 for cooperating with the positioning columns 63, and the two C-shaped clamping frames 65 are symmetrically distributed left and right.

[0047] When it is necessary to turn the door frame over for welding, first manually pull the two C-shaped clamping frames 65 away from each other so that the C-shaped clamping frames 65 move away from the outside of the positioning columns 63. Then, control the driving motor 62 to operate and drive the rotating shaft 61 to rotate. The rotating shaft 61 then drives the bearing frame 4 to rotate. During the rotation of the bearing frame 4, the positioning columns 63 are driven to pass through the through grooves 64. After the bearing frame 4 rotates 180 degrees, the two positioning columns 63 exchange positions. Then, push the C-shaped clamping frames 65 to move closer to each other and slide them on the outside of the positioning columns 63, so as to lock and limit the rotated bearing frame 4. Then, the other side of the door frame can be welded by controlling the welding robot arm 3.

[0048] During operation, the respective pillar and girder components in the door frame are separately placed in the placing assembly 52, the self-clamping assembly one 55, the self-clamping assembly two 56, the displacement assembly 53, and the pushing assembly 54. Then, by controlling the linkage assembly 57, the positions of the self-clamping assembly one 55, the self-clamping assembly two 56, the displacement assembly 53, and the pushing assembly 54 are simultaneously adjusted so that the respective pillars and girders are spliced together at the same time. Then, by controlling the operation of the welding robot arm 3, the welding treatment can be quickly carried out at each splicing location of the components of the door frame. After the single-sided welding of the door frame is completed, by controlling the flipping part 6 to drive the bearing frame 4 to flip 180 degrees, it is also convenient to quickly weld the other side of the door frame. When the overall welding of the door frame is completed, control the flipping part 6 to drive the bearing frame 4 to flip back to the initial position again, and then control the synchronous splicing part 5 to loosen and remove the door frame.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0050] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0051] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. An excavator component welding robot, comprising a support platform, an outer frame fixedly connected to the upper part of the support platform, and a welding manipulator installed on the side of the support platform, characterized in that: A bearing frame is rotatably arranged in the outer frame through a flipping part, and a synchronous splicing part for quickly positioning and abutting and splicing each scattered beam column in the excavator door frame together is installed on the bearing frame; The synchronous splicing part includes a support fixed between the left and right opposite sides of the bearing frame. A placing component for placing the L-shaped pillar section in the excavator door frame is jointly arranged between the support and the bearing frame. A displacement component for placing the vertical pillar of the excavator door frame is arranged at the right part of the upper end face of the support. A pushing component for placing the transverse pillar of the excavator door frame is arranged on the front cavity wall of the bearing frame. A self-clamping component one for automatically centering and clamping and limiting the vertical beam of the excavator door frame is arranged in the middle of the upper end face of the support. A self-clamping component two for automatically centering and clamping the cross beam of the excavator door frame is arranged at the rear part of the support; A linkage component for sequentially triggering the displacement component, the self-clamping component two and the self-clamping component one to operate so as to splice the vertical pillar, the cross beam, the vertical beam and the L-shaped pillar section in the excavator door frame together is jointly arranged between the support and the pushing component.

2. The welding robot for an excavator component according to claim 1, characterized in that: The pushing component includes an electric telescopic rod fixedly connected to the front cavity wall of the bearing frame. A support plate is fixedly connected to the rear end of the electric telescopic rod. Two U-shaped seats are symmetrically fixedly connected to the rear end face of the support plate. A push plate is slidably connected to the front cavity wall of the U-shaped seat through a spring telescopic rod.

3. The welding robot for an excavator component according to claim 2, wherein: The self-clamping component one includes two chutes symmetrically arranged left and right on the upper end face of the support, and two rows of chutes are symmetrically arranged front and rear. Sliders are slidably connected in the chutes. A first top spring is jointly fixedly connected between the sliders and the chutes. The upper end faces of adjacent front and rear sliders are jointly fixedly connected with an L-shaped clamping plate one.

4. The welding robot for an excavator assembly according to claim 3, wherein: The self-clamping component two includes two mounting plates symmetrically fixedly connected to the rear end face of the support. Mounting seats are fixedly connected to the upper end faces of the two mounting plates through fixing blocks. Two through holes symmetrically arranged left and right are opened in the mounting seats. Slide columns are symmetrically slidably connected in the through holes front and rear. A limiting spring is jointly fixedly connected between two adjacent front and rear slide columns. The ends of two adjacent left and right slide columns on the mounting seat away from the mounting seat are jointly fixedly connected with an L-shaped clamping plate two. A bidirectional telescopic rod is hinged to the lower end face of the mounting seat, and the end parts of the bidirectional telescopic rod are respectively hinged to the lower end face of the L-shaped clamping plate two.

5. The welding robot for an excavator component according to claim 4, wherein: The displacement component includes a sliding groove opened in the right part of the support. A U-shaped placing frame is slidably connected to the sliding groove. A reset spring is jointly fixedly connected between the sliding groove and the U-shaped placing frame.

6. The welding robot for an excavator component according to claim 5, characterized in that: The linkage component includes a top rod, a limiting groove, a strip-shaped top plate, an embedding groove and a first wedge-shaped block. The rear end faces of the two U-shaped seats are both fixedly connected with a top rod. A limiting groove for cooperating with the L-shaped clamping plate two is opened in the rear end face of the top rod. Strip-shaped top plates are fixedly connected to the opposite sides of the two L-shaped clamping plates one. Embedding grooves are opened in the opposite sides of the two top rods. Sliding plates are slidably connected in the embedding grooves. A second top spring is jointly fixedly connected between the sliding plates and the embedding grooves. First wedge-shaped blocks for cooperating with the strip-shaped top plates are fixedly connected to the opposite sides of the two sliding plates.

7. The welding robot for an excavator component according to claim 6, wherein: An L-shaped dial rod fixedly connected to the lower end face of the U-shaped placing frame slidably penetrates through the sliding groove. A dial column is fixedly connected to the lower end face of the horizontal section of the L-shaped dial rod. A second wedge-shaped block for cooperating with the dial column is fixedly connected to the lower end face of the right top rod through a connecting rod.

8. The welding robot for an excavator component according to claim 1, characterized in that: The placement assembly comprises a U-shaped frame fixedly connected to the left part of the upper end surface of the support and a C-shaped frame fixedly connected to the rear cavity wall of the bearing frame.

9. The welding robot for an excavator component according to claim 1, wherein: The flipping part includes two rotating shafts that penetrate and rotatably connect to the front and rear wall panels of the front wall panel of the outer frame respectively, the front end surface of the outer frame is fixedly connected to the driving motor through a connecting frame, the output shaft of the driving motor is fixedly connected to the end of the rotating shaft located at the front, the supporting frame is fixedly connected between the two rotating shafts, the front end surface of the supporting frame is symmetrically fixedly connected to the positioning column, the front cavity wall of the outer frame is symmetrically provided with two through grooves for the positioning column to slide through, the left and right sides of the outer frame are slidably penetrated and connected with two C-shaped card frames that extend into the through grooves for cooperating with the positioning column, and the two C-shaped card frames are symmetrically distributed.

10. The welding robot for an excavator component according to claim 4, wherein: The opposite ends of the two front and rear adjacent sliding columns are fixedly connected to the limiting blocks, and the inner wall of the through hole is symmetrically fixedly connected to two limiting rings for cooperating with the limiting blocks.

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