Excavator u-shaped beam welding tool

Abstract

The present application provides a kind of excavator U beam welding tool, including base, bottom compaction mechanism is set along the length direction of base, for supporting and compacting the bottom cross plate of U beam, lateral compaction mechanism is set in the both sides of bottom compaction mechanism along the length direction of base, for compacting the main beam of U beam from opposite side, end compaction mechanism is set in the both ends of base top along the length direction of base, for compacting the main beam of U beam from two opposite ends, the present application uses bottom compaction mechanism, lateral compaction mechanism and end compaction mechanism to position and compact excavator U beam from multiple directions respectively, can realize the team welding of different models excavator U beam product, can be automatically fed and discharged by robot and automatically welded by robot, can conveniently assemble and weld each component of U beam, team time consumption is short, can be fully unmanned intervention, reduce labor cost, realize automatic production, improve production efficiency, guarantee the welding consistency of U beam product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of excavator U-beam production, in particular to a kind of excavator U-beam welding tool. BACKGROUND

[0002] Excavator is an important engineering machinery, and U-beam is an important component of excavator, which bears all the weight of excavator and is responsible for the walking of excavator. Since the quality of U-beam is large, the components such as Figure 2 As shown in the figure, it includes bottom plate 60, main beam 70 and support plate 80. Since the installation direction and size of the components of U-beam are quite different, it is difficult to combine when welding U-beam. In the current excavator U-beam production process, the assembly of U-beam is mainly manually hoisted by crane according to certain order, then positioned and clamped manually before welding. Due to the influence of crane movement accuracy, workpiece weight and the difficulty of manual positioning, the existing technical solution has the problems of difficult manual positioning, large manual feeding workload, high labor intensity, low production efficiency and poor consistency of subsequent welding. SUMMARY

[0003] The present application provides a kind of welding tool, which can conveniently assemble and weld each component of excavator U-beam, has short assembly time, can be fully automated production without human intervention, reduces labor cost, ensures the welding consistency of U-beam product.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] A kind of excavator U-beam welding tool, including base, further comprising:

[0006] Bottom pressing mechanism, the bottom pressing mechanism is arranged along the length direction of base, for supporting and pressing the bottom plate of U-beam;

[0007] Lateral pressing mechanism, the lateral pressing mechanism is arranged on both sides of bottom pressing mechanism along the length direction of base, for pressing the main beam of U-beam from opposite sides; and

[0008] End pressing mechanism, the end pressing mechanism is arranged at both ends of the top of base along the length direction of base, for pressing the main beam of U-beam from horizontal and vertical directions along both ends of main beam.

[0009] Preferably, the bottom pressing mechanism comprises a supporting pressing assembly and a centering pressing assembly, the supporting pressing assembly comprises a supporting seat arranged on the top of the base, two opposite and spaced supporting blocks arranged on the top of the supporting seat, supporting blocks arranged on the top of the supporting blocks, and a pressing block assembly capable of rotating to cooperate with the supporting blocks under the driving of the power assembly to support and press the workpiece; the centering pressing assembly comprises a mounting seat arranged on the top of the base, two opposite and spaced fixing seats arranged on the top of the mounting seat, and clamping blocks capable of displacing along the length direction of the fixing seat to contact the workpiece.

[0010] Preferably, the lateral pressing mechanism comprises lateral pressing frames arranged on both sides of the bottom pressing mechanism along the length direction of the base, pressing rollers rotatably arranged on the lateral pressing frames, and a lead screw assembly one for driving the lateral pressing frames to displace along the width direction of the base.

[0011] Preferably, the lead screw assembly one comprises a lead screw one arranged along the width direction of the base and a lead screw nut one capable of axially displacing along the lead screw one, and the lateral pressing frames are arranged on the lead screw nut one.

[0012] Preferably, the end pressing mechanism comprises a fixed part fixedly arranged on one end of the top of the base and a moving part arranged on the other end of the top of the base and capable of moving relative to the fixed part along the length direction of the base.

[0013] Preferably, the fixed part and the moving part each comprise a fixed support, end pressing blocks arranged on the fixed support near one side of the bottom pressing mechanism, a rotating support rotatably arranged on the top of the fixed support, and vertical pressing blocks arranged on the rotating support for pressing the main beam of the vertical pressing U-shaped beam from the vertical direction.

[0014] Preferably, the bottom of the fixed support is further provided with an inclined hydraulic cylinder, and the output end of the inclined hydraulic cylinder is hinged to the rotating support.

[0015] Preferably, the end pressing blocks are two end pressing blocks arranged on the side wall of the fixed support, and the end pressing blocks are provided with pressing grooves matched with the main beam of the U-shaped beam to position the main beam.

[0016] Preferably, the rotating support is provided with a vertical pressing cylinder, the vertical pressing blocks are arranged on the output end of the vertical pressing cylinder, and the vertical pressing blocks are arc-shaped blocks matched with the top of the main beam of the U-shaped beam.

[0017] Preferably, the top of the base is further provided with an oil cylinder guide rail assembly, the oil cylinder guide rail assembly comprises guide rails distributed along the length direction of the base, guide blocks capable of displacing along the length direction of the guide rails, and oil cylinders for driving the fixed support to displace, and the fixed support of the moving part is arranged on the guide blocks.

[0018] From the above technical solutions, the present application has the following beneficial effects:

[0019] 1. In the present application, the bottom cross plate is placed on the bottom pressing mechanism by an external conveying device such as a conveying robot, positioning and pressing are carried out through the bottom pressing mechanism, then the gripper respectively places the support plate in the predetermined position and completes the welding, then the robot places the main beam with the bottom cross plate and the support plate in place, then the lateral pressing mechanism and the end pressing mechanism respectively position and press the two sides of the main beam and the horizontal and vertical directions of the two ends of the main beam, thus completing the assembly of the U-shaped beam, which can facilitate the welding of the main beam, the bottom pressing mechanism, the lateral pressing mechanism and the end pressing mechanism of the present application can position and press the excavator U-shaped beam from multiple directions, which can realize the assembly welding of excavator U-shaped beam products of different models, can realize automatic feeding and discharging of the robot and automatic welding of the robot, can facilitate the assembly and welding of each part of the U-shaped beam, the assembly time is short, the subsequent welding precision is high, can realize full-automatic production without human intervention, reduces labor cost, realizes fully-automated production, improves production efficiency and ensures the welding consistency of the U-shaped beam product.

[0020] 2. In the present application, the bottom pressing mechanism, the lateral pressing mechanism and the end pressing mechanism can realize automatic positioning and clamping of each component of the U-shaped beam, and since there is a certain gap between the above pressing mechanism and the workpiece before clamping, the assembly of each component of the excavator U-shaped beam product of different models can be realized, and the product adaptability of the tooling is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present application;

[0022] Figure 2 is a schematic diagram of the excavator U-shaped beam;

[0023] Figure 3 is a structural schematic diagram of the connection between the end pressing mechanism and the oil cylinder guide rail assembly;

[0024] Figure 4 is Figure 3 a structural schematic diagram of part A in the present application;

[0025] Figure 5 is a perspective view of the support pressing assembly;

[0026] Figure 6 is a front view of the support pressing assembly;

[0027] Figure 7 is a perspective view of the centering pressing assembly;

[0028] Figure 8 is a front view of the centering pressing assembly;

[0029] Figure 9 is a structural schematic diagram of the lateral pressing mechanism.

[0030] In the figure: 10, base; 210, support and press assembly; 211, support seat; 212, cushion block; 213, support block; 214, power block; 215, power rod; 216, connecting rod; 217, pressing block; 220, centering and pressing assembly; 221, mounting seat; 222, fixing seat; 223, clamping block; 224, driving rod; 225, rolling bearing; 30, lateral pressing mechanism; 310, lateral pressing frame; 320, pressing roller; 331, screw rod I; 332, screw nut I; 40, end pressing mechanism; 410, fixed support; 420, end pressing block; 421, pressing groove; 430, rotating support; 440, vertical pressing block; 450, inclined hydraulic cylinder; 460, vertical pressing cylinder; 60, bottom cross plate; 70, main beam; 80, support plate. DETAILED DESCRIPTION

[0031] A preferred embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0032] It should be noted that the excavator U-beam is mainly composed of a bottom cross plate 60, a main beam 70 and a support plate 80, which will be described in detail below. Figure 2 .

[0033] Referring to Figure 1 , a welding tool for excavator U-beam, comprising a base 10, a bottom pressing mechanism, a lateral pressing mechanism 30 and an end pressing mechanism 40, the bottom pressing mechanism is arranged along the length direction of the base 10 for supporting and pressing the bottom cross plate 60 of the U-beam, the lateral pressing mechanism is arranged on both sides of the bottom pressing mechanism along the length direction of the base 10 for pressing the main beam 70 of the U-beam from the opposite sides, and the end pressing mechanism is arranged at both ends of the top of the base 10 along the length direction of the base 10 for pressing the main beam 70 of the U-beam from the horizontal and vertical directions at both ends of the main beam. In use, the bottom cross plate 60 is placed on the bottom pressing mechanism by an external handling device such as a handling robot, and is positioned and pressed by the bottom pressing mechanism, then the support plate 80 is placed at the predetermined position by the gripper and is welded, and then the main beam 70 is placed at the specified position by the robot and is positioned and pressed by the lateral pressing mechanism 30 and the end pressing mechanism 40 at both sides of the main beam 70 and at the horizontal and vertical directions at both ends of the main beam, thereby completing the assembly of the U-beam, which facilitates the welding of the main beam 70. The present application utilizes the bottom pressing mechanism, the lateral pressing mechanism and the end pressing mechanism to position and press the excavator U-beam from multiple directions, which can realize the assembly and welding of U-beam products of different models, can automatically feed and discharge by the robot and automatically weld by the robot, can facilitate the assembly and welding of the components of the U-beam, has a short assembly time, has high subsequent welding precision, can be fully operated without human intervention, reduces labor cost, realizes fully automated production, improves production efficiency and ensures the welding consistency of the U-beam products.

[0034] Referring to the drawings Figure 5 、 Figure 6 , as a preferred technical solution of the present application, the bottom pressing mechanism comprises a supporting and pressing assembly 210 and a centering and pressing assembly 220, the supporting and pressing assembly comprises a supporting seat 211 arranged on the top of the base 10, two cushion blocks 212 arranged on the top of the supporting seat 211 in opposite intervals, two supporting blocks 213 arranged on the top of the cushion blocks 212, and a pressing block assembly, the supporting blocks 213 are used for supporting the bottom plate of the U-shaped beam to be welded, the pressing block assembly can rotate to cooperate with the supporting blocks 213 to support and press the workpiece under the drive of a power assembly, specifically, the power assembly is an oil cylinder arranged on the supporting seat 211, the output end of the oil cylinder can move vertically, the pressing block assembly comprises a power block 214, a power rod 215, a connecting rod 216 and a pressing block 217, the power block 214 is arranged on the output end of the oil cylinder, the power rod 215 is hinged at the end of the power block 214, one end of the connecting rod 216 is hinged on the top of the cushion block 212, the other end is hinged with the middle part of the power rod 215, and the pressing block 217 is rotatably arranged on the end of the power rod 215 away from the power block 214, in this way, under the drive of the oil cylinder, the power block 214 can be vertically displaced, the power block 214 in turn drives the power rod 215 to rotate along the connecting rod 216, the power rod 215 in turn drives the pressing block 217 to rotate to approach or separate from the supporting blocks 213, after the bottom plate of the U-shaped beam to be welded is placed on the supporting blocks 213, and after the pressing block 217 is rotated to cooperate with the supporting blocks 213 to clamp the bottom plate, the support and pressing of the bottom plate are realized, so as to facilitate the subsequent welding operation.

[0035] Referring to Figure 7 、 Figure 8The centering and pressing assembly comprises a mounting base 221 arranged on the top of the base 10, fixing bases 222 and clamping blocks 223, the fixing bases 222 are two and oppositely arranged on the top of the mounting base 221, the clamping blocks 223 can be displaced along the length direction of the fixing bases 222 and press the workpiece when contacting with the workpiece, further, in order to facilitate the movement of the clamping blocks 223 along the fixing bases 222, the sliding rails are arranged on the top of the fixing bases 222 along the length direction of the fixing bases 222, and the sliding blocks matched with the sliding rails are arranged on the bottom of the clamping blocks 223, in addition, in order to drive the clamping blocks 223, the driving assembly can also be arranged on the mounting base 221, the driving assembly comprises an oil cylinder arranged on the mounting base 221 and driving rods 224, the piston rod of the output end of the oil cylinder is arranged in the gap between the two fixing bases 222, the driving rods 224 are two and hinged on the piston rod of the oil cylinder, and the ends of the driving rods 224 away from the oil cylinder are hinged with the clamping blocks 223, so that under the driving of the oil cylinder, the clamping blocks 223 can be driven to move along the fixing bases 222 through the driving rods 224, so as to realize clamping when the clamping blocks 223 contact with the workpiece, in addition, the rolling bearings 225 can be rotatably arranged on the contact parts of the clamping blocks 223, which can not only ensure the pressing of the workpiece, but also ensure that the workpiece can slide along the rolling bearings 225 to the specified position.

[0036] With reference to Figure 9 As a preferred technical scheme of the present application, the lateral pressing mechanism 30 comprises lateral pressing frames 310, pressing rollers 320 and a lead screw assembly one, the lateral pressing frames 310 are arranged on both sides of the bottom pressing mechanism along the length direction of the base 10, the pressing rollers 320 are rotatably arranged on the lateral pressing frames 310, and the lead screw assembly one is used to drive the lateral pressing frames 310 to displace along the width direction of the base, specifically, the lead screw assembly one comprises a lead screw one 331 arranged along the width direction of the base 10 and a lead screw nut one 332 capable of displacing along the axial direction of the lead screw one, and the lateral pressing frames 310 are arranged on the lead screw nut one, in the actual use process, a motor used to drive the lead screw one to rotate can also be arranged, so that the lead screw one drives the lead screw nut one to displace along the axial direction of the lead screw one under the driving of the motor, since the lateral pressing frames 310 are arranged on the lead screw nut one, the lateral pressing frames on both sides and the pressing rollers thereon can be driven to displace oppositely, so as to realize the positioning and pressing of the main beam from both sides when the pressing rollers 320 on both sides contact with the side walls of the main beam 70.

[0037] It should be noted that the mechanism for realizing the relative displacement of the lateral pressing frames 310 and the pressing rollers 320 thereon in the present application is not limited to the lead screw assembly, other structures such as the sliding block driven by the cylinder to displace along the sliding rail can also realize the function of the present application, which will not be described in detail here.

[0038] As a preferred technical solution of the present invention, the end clamping mechanism 40 includes a fixed part fixed to one end of the top of the base 10 and a movable part disposed at the other end of the top of the base. The movable part can move relative to the fixed part along the length direction of the base. In this way, during actual use, the fixed part is fixed at the top of the base and remains stationary. The main beam 70 constituting the U-shaped beam is positioned and clamped from the bottom and side by the bottom clamping mechanism and the side clamping mechanism, respectively. The other side of the main beam 70 can be fixed by the fixed part. At this time, the movable part positions and clamps both ends of the main beam during the process of moving relative to the fixed part. This combination of the bottom clamping mechanism and the side clamping mechanism realizes multi-directional positioning and clamping of the main beam 70, improving the automated assembly and positioning clamping of the components of the main beam.

[0039] Reference Figure 3 , Figure 4 Furthermore, both the fixed part and the moving part include a fixed support 410, an end clamping block 420, a rotating support 430, and a vertical clamping block 440. The end clamping block 420 is disposed on the side of the fixed support 410 near the bottom clamping mechanism, the rotating support 430 is rotatably disposed on the top of the fixed support 410, and the vertical clamping block 440 is disposed on the rotating support 430 for vertically clamping the U-shaped beam main beam. In this way, during use, the fixed part fixes the end of the main beam 70 by means of the end clamping block 420 disposed inside the fixed support 410, and the moving part moves relative to the fixed part. After the end clamping block on it is fixed to the other end of the main beam 70, the vertical clamping block 440 on the fixed part and the moving part can be used to position and clamp the main beam from the top of both ends of the main beam.

[0040] Furthermore, the rotating support 430 can be rotatably mounted on the top of the fixed support 410 via a pin. In order to realize the rotation of the rotating support relative to the fixed support, an inclined hydraulic cylinder 450 is also provided at the bottom of the fixed support 410. The bottom of the inclined hydraulic cylinder is hinged to the fixed support, and the output end of the inclined hydraulic cylinder is hinged to the rotating support 430.

[0041] As a preferred technical solution of the present invention, the end clamping blocks 420 are two provided on the side wall of the fixed support 410, and the end clamping blocks 420 are provided with clamping grooves 421 that cooperate with the U-shaped beam main beam 70. The clamping grooves can engage the main beam, thereby positioning and clamping the main beam when the end clamping blocks contact the end of the main beam, so as to achieve the clamping and fixing of the main beam from the lateral direction.

[0042] As a preferred technical scheme of the present application, the rotating support 430 is provided with a vertical pressing cylinder 460, and the vertical pressing block 440 is arranged at the output end of the vertical pressing cylinder. The vertical pressing block 440 is an arc-shaped block matched with the top of the U-shaped beam main beam. In this way, under the drive of the oblique hydraulic cylinder 450, the rotating support is driven to approach the top of the main beam, and then the vertical pressing cylinder 460 is used to drive the vertical pressing block to contact the top of the main beam. During the process of contacting the top of the main beam from top to bottom, the vertical pressing block realizes the pressing and fixing of the main beam from the longitudinal direction. Meanwhile, the end pressing block 420 is used to press and fix the end of the main beam from the transverse direction, so as to realize the positioning and pressing of the main beam from the transverse and longitudinal directions.

[0043] Further, in order to realize the displacement of the moving part along the length direction of the base to realize the movement relative to the fixed part, an oil cylinder guide rail assembly is further arranged at the top of the base 10. The oil cylinder guide rail assembly comprises two straight guide rails distributed along the length direction of the base, a guide block capable of being displaced along the length direction of the guide rail, and an oil cylinder arranged in parallel between the two guide rails. The output end of the oil cylinder is connected with the fixed support 410 of the moving part. Specifically, the fixed support 410 of the moving part is arranged on the two guide rails. In actual use, the fixed support 410 of the moving part can be driven to displace relative to the fixed part by the oil cylinder, so as to realize the positioning and pressing of the main beam from both ends by the fixed part. It should be noted that the mode for realizing the displacement of the moving part is not limited to the combination of the oil cylinder and the guide rail. The displacement of the moving part can also be realized by using a motor to drive a screw nut to move along a screw rod. Therefore, no more details are given here.

[0044] In use, the bottom horizontal plate 60 is placed on the bottom pressing mechanism by a handling robot. When the sensor detects the workpiece, a signal is transmitted to the hydraulic cylinder of the centering and pressing assembly. The hydraulic cylinder of the centering and pressing assembly is extended to complete the centering, positioning and pressing of the bottom horizontal plate. Then the hydraulic cylinder of the supporting and pressing assembly is extended to complete the pressing of the bottom horizontal plate. The robot places each supporting plate 80 constituting the U-shaped beam at the predetermined position by the gripper to complete the welding. Then the robot places the main beam 70 at the predetermined position by the gripper. When the sensor detects the signal, the screw assembly in the lateral pressing mechanism is started to drive the two lateral pressing frames to relatively approach each other to drive the pressing rollers to complete the pressing of the two side walls of the main beam. At this time, one end of the main beam is fixed by the fixed part of the end pressing mechanism. Then the moving part is moved relative to the fixed part to press the main beam 70 from both ends. Specifically, the end pressing block 420 arranged in the inner side of the fixed support 410 is used to limit the end of the main beam. Then the oblique hydraulic cylinder is used to drive the rotating support 430 to rotate to approach the top of the main beam, so as to push the vertical pressing cylinder to the predetermined position. The vertical pressing cylinder is used to drive the vertical pressing block to press the two ends of the top of the main beam 70, so as to complete the assembly of each component constituting the U-shaped beam, and then complete the welding of the U-shaped beam.

[0045] The above described embodiments are merely intended to describe the preferred embodiments of the present application, and are not intended to limit the scope of the present application, and various modifications and improvements made by those skilled in the art to the technical solutions of the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. An excavator U-beam welding fixture comprising a base (10), characterised in that, Also included are: a bottom pressing mechanism arranged along the length direction of the base (10) for supporting and pressing the bottom cross plate (60) of the U-shaped beam; a lateral pressing mechanism (30) arranged on both sides of the bottom pressing mechanism along the length direction of the base (10) for pressing the main beam (70) of the U-shaped beam from opposite sides; and an end pressing mechanism (40) arranged at both ends of the top of the base (10) along the length direction of the base (10) for pressing the main beam (70) of the U-shaped beam from both ends of the main beam in the horizontal and vertical directions; the end pressing mechanism (40) includes a fixed part fixed at one end of the top of the base (10) and a moving part arranged at the other end of the top of the base and capable of moving relative to the fixed part along the length direction of the base; the fixed part and the moving part each include a fixed support (410), an end pressing block (420) arranged on the side wall of the fixed support (410) near the bottom pressing mechanism, a rotating support (430) rotatably arranged on the top of the fixed support (410), and a vertical pressing block (440) arranged on the rotating support (430) for pressing the main beam of the U-shaped beam vertically; the bottom pressing mechanism includes a supporting and pressing assembly (210) and a centering and pressing assembly (220), the supporting and pressing assembly includes a supporting seat (211) arranged on the top of the base (10), two opposite and spaced apart supporting blocks (212) arranged on the top of the supporting seat (211), a supporting block (213) arranged on the top of the supporting block (212), and a pressing block assembly capable of rotating to cooperate with the supporting block (213) under the drive of a power assembly to support and press the workpiece; the centering and pressing assembly includes a mounting seat (221) arranged on the top of the base (10), two opposite and spaced apart fixed seats (222) arranged on the top of the mounting seat (221), and a clamping block (223) capable of moving along the length direction of the fixed seat (222) to contact the workpiece; the lateral pressing mechanism (30) includes a lateral pressing frame (310) arranged on both sides of the bottom pressing mechanism along the length direction of the base (10), a pressing roller (320) rotatably arranged on the lateral pressing frame (310), and a lead screw assembly one for driving the lateral pressing frame (310) to move along the width direction of the base.

2. The excavator U-beam welding fixture of claim 1, wherein, the lead screw assembly one includes a lead screw one (331) arranged along the width direction of the base (10) and a lead screw nut one (332) capable of moving axially along the lead screw one, and the lateral pressing frame (310) is arranged on the lead screw nut one.

3. The excavator U-beam welding fixture of claim 1, wherein, the bottom of the fixed support (410) is further provided with an inclined hydraulic cylinder (450), and the output end of the inclined hydraulic cylinder (450) is hinged to the rotating support (430).

4. The excavator U-beam welding fixture of claim 1, wherein, the end pressing block (420) is arranged on the side wall of the fixed support (410), and the end pressing block (420) is provided with a pressing groove (421) for cooperating with the main beam (70) of the U-shaped beam to position the main beam.

5. The excavator U-beam welding fixture of claim 1, wherein, The rotating support (430) is provided with a vertical pressing cylinder (460), and the vertical pressing block (440) is arranged at the output end of the vertical pressing cylinder.

6. The excavator U-beam welding fixture of claim 5, wherein, The top of the base (10) is further provided with an oil cylinder guide rail assembly, which comprises guide rails distributed along the length direction of the base, guide blocks capable of being displaced along the length direction of the guide rails, and oil cylinders for driving the displacement of the fixed support (410). The fixed support (410) of the moving part is arranged on the guide blocks.

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