Engineering machinery skeleton crack patching welding structure and welding device

Abstract

The utility model belongs to the technical field of mechanical skeleton welding repair structures, and discloses an engineering mechanical skeleton crack patching welding structure and a welding device, a mechanical arm is a hollow pipe wall composed of two transverse surface base materials arranged up and down and two longitudinal surface base materials arranged front and back, holes are formed in the surfaces of the longitudinal surface base materials along cracks, and the holes are communicated with the transverse surface base materials. Two symmetrically-arranged crack arrest plates are welded to the inner wall of the longitudinal face base material, a transverse plate is fixedly connected between the two crack arrest plates, filling plates are welded to the surfaces of the crack arrest plates, and weld joint slopes are formed in the butt joint positions of the filling plates and the longitudinal face base material. The crack is cut and dug out, the crack arrest plate is welded to the inner wall of the longitudinal face base material, the filling plate is welded to the surface of the crack arrest plate, then the gap filling welding layer is formed between the filling plate and the longitudinal face base material in a repair welding mode, the firmness of the whole mechanical arm is high after repair welding, and the service life of the mechanical arm is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mechanical skeleton welding repair structure technology, specifically a welding structure and welding device for repairing cracks in the skeleton of engineering machinery. Background Technology

[0002] Large-scale engineering machinery, including rotary drilling rigs, electric shovels, and mining trucks, are production equipment in open-pit mines. The frame of the equipment is formed by welding sheet metal structural parts. The frame serves to support and connect the various system components and bears various internal and external loads from the operation of the equipment.

[0003] For sheet metal structural components of construction machinery that develop small cracks or large breaks, most welders previously used direct welding for repair or straightening the broken area of ​​the frame before welding and then reinforcing it with an additional welded plate (commonly known as "pulling and welding"). However, this method has a short service life and causes secondary deterioration of the sheet metal around the weld, making further repair impossible. Although this welding method is fast, data from years of practical application shows that it generally has a short service life. Repeated welding causes the failure area of ​​the base material of the frame to become larger and larger, seriously affecting the uptime and production efficiency of the equipment. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a welding structure and welding device for repairing cracks in the skeleton of engineering machinery, which has the advantages of high repair strength and convenient welding, thus solving the aforementioned problems.

[0005] To achieve the aforementioned goal of high welding strength and convenient welding, this utility model provides the following technical solution: a welding structure for repairing cracks in the skeleton of engineering machinery, including a robotic arm. The robotic arm consists of a hollow tube wall composed of two horizontal base materials placed vertically and two vertical base materials placed front to back. Holes are formed along the cracks on the surface of the vertical base materials. Two symmetrically arranged crack-stopping plates are welded to the inner wall of the vertical base materials. A horizontal plate is fixedly connected between the two crack-stopping plates. A filler plate is welded to the surface of the crack-stopping plates. A weld bevel is formed at the joint between the filler plate and the vertical base material. A filler weld layer is formed at the weld bevel.

[0006] A welding device for patching cracks in the frame of the aforementioned engineering machinery includes an H-shaped frame, with connecting plates fixedly installed on both sides of the H-shaped frame. A screw is inserted into the inside of the connecting plate, and the screw is pre-welded to the cross-shaped base material. A locking nut A is threadedly connected to the outer side of the screw.

[0007] Preferably, an extension rod is slidably inserted at the tail end of the H-shaped frame, and a sliding rod is inserted at the tail end of the upper and lower extension rods. Locking nuts B are threadedly connected to both ends of the sliding rod.

[0008] Preferably, a crossbar is slidably connected to the outer side of the slide rod via a sliding sleeve, a slide table is slidably installed on the outer side of the crossbar, resistance adjustment components are provided on the surface of the sliding sleeve and the bottom of the slide table, an inclined frame is fixedly installed on the surface of the slide table, a U-shaped frame is fixedly installed on the top of the inclined frame, and a U-shaped cover is hinged to the top of the U-shaped frame.

[0009] Preferably, rubber pads are fixedly installed on the inner walls of the U-shaped frame and the U-shaped cover, and the ends of the U-shaped frame and the U-shaped cover away from the hinge are interlocked by a lock head. Welding clamps for welding machines are installed inside the U-shaped frame and the U-shaped cover.

[0010] Preferably, the resistance adjustment assembly includes a base plate, a threaded sleeve is installed at the bottom of the base plate, an adjusting bolt is connected to the internal thread of the threaded sleeve, and a ball bearing is movably installed at the end of the adjusting bolt.

[0011] Preferably, the tail end of the welding machine clamp is connected to an external welding machine, and one end of the external welding machine is connected to a robotic arm via a welding clamp.

[0012] Compared with the prior art, this utility model provides a welding structure and welding device for patching cracks in the skeleton of engineering machinery, which has the following beneficial effects:

[0013] 1. The mechanical frame crack repair and welding structure and welding device involves first cutting away the crack, then welding a crack-stopping plate onto the inner wall of the longitudinal base material, welding a filler plate onto the surface of the crack-stopping plate, and finally welding the filler plate to the longitudinal base material to form a filler weld layer. In this application, the filler plate and crack-stopping plate are made of the same material as the longitudinal base material, which makes the entire mechanical arm strong after repair welding and improves the service life of the mechanical arm.

[0014] 2. The engineering machinery frame crack repair welding structure and welding device: The H-shaped frame is pre-connected to the horizontal base material via connecting plates, screws, and locking nuts A. Then, the extension rod is connected using slide rods and locking nuts B. The welding machine clamp is clamped onto the U-shaped frame, and the U-shaped frame and U-shaped cover are locked together using lock heads. The welding machine clamp can slide horizontally on the crossbar via a slide table, and can also rotate around the axis of the crossbar and adjust the tilt angle. The welding machine clamp can slide up and down along the slide rod via a sliding sleeve. During this process, the welding machine clamp can perform horizontal welding, vertical welding, and tilt angle adjustment, thereby ensuring smooth and fast welding without interruption. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the transverse base material, longitudinal base material, and filling plate of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the crack-stopping plate, the filler plate, and the filler weld layer of this utility model.

[0017] Figure 3 This is a schematic diagram of the overall structure of the welding device of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the H-shaped frame, slide bar, crossbar, and welding machine clamp of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the sliding sleeve, crossbar, and welding machine clamp of this utility model;

[0020] Figure 6 This is a structural schematic diagram of the slide, U-shaped frame, and U-shaped cover of this utility model;

[0021] Figure 7 This is a schematic diagram of the resistance adjustment component of this utility model.

[0022] In the diagram: 1. Crack arrestor plate; 2. Filler plate; 3. Transverse base material; 4. Longitudinal base material; 5. Horizontal plate; 6. Filler weld layer; 7. H-frame; 71. Connecting piece; 72. Screw; 73. Locking nut A; 74. Extension rod; 75. Slide rod; 76. Locking nut B; 77. Sliding sleeve; 78. Crossbar; 79. Slide table; 710. Diagonal frame; 711. U-frame; 712. U-shaped cover; 713. Rubber pad; 714. Lock head; 715. Welding machine clamp; 716. Base plate; 717. Screw sleeve; 718. Adjusting bolt; 719. Ball bearing. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-2 A crack repair and welding structure for an engineering machinery frame includes a robotic arm. The robotic arm is a hollow tube wall composed of two horizontal base materials 3 placed vertically and two vertical base materials 4 placed front to back. Holes are opened along the crack on the surface of the vertical base material 4. Two symmetrically arranged crack-stopping plates 1 are welded to the inner wall of the vertical base material 4. A horizontal plate 5 is fixedly connected between the two crack-stopping plates 1. A filling plate 2 is welded to the surface of the crack-stopping plate 1. A weld bevel is opened at the joint between the filling plate 2 and the vertical base material 4. A filler weld layer 6 is formed by welding at the weld bevel.

[0025] Please see Figure 3-4A welding device for patching cracks in the frame of the aforementioned engineering machinery includes an H-shaped frame 7. Connecting pieces 71 are fixedly installed on both sides of the H-shaped frame 7. A screw 72 is inserted into the inside of the connecting pieces 71. The screw 72 is pre-welded to the cross-section base material 3. A locking nut A73 is threaded onto the outside of the screw 72. The H-shaped frame 7 is fitted onto the screw 72 through the connecting pieces 71, and the connecting pieces 71 are then locked in place by the locking nut A73.

[0026] Please see Figure 3-4 The tail end of the H-shaped frame 7 has an extension rod 74 that slides through it. The tail ends of the upper and lower extension rods 74 are connected to a slide rod 75. The two ends of the slide rod 75 are threaded with locking nuts B76. Pulling the extension rod 74 outward can adjust the distance between the welding clamp and the robotic arm, ensuring that the welding clamp can easily hold the welding rod.

[0027] Please see Figure 5-6 A crossbar 78 is slidably connected to the outside of the slide bar 75 via a slide sleeve 77. A slide table 79 is slidably installed on the outside of the crossbar 78. Resistance adjustment components are provided on the surface of the slide sleeve 77 and the bottom of the slide table 79. A slant bracket 710 is fixedly installed on the surface of the slide table 79. A U-shaped bracket 711 is fixedly installed on the top of the slant bracket 710. A U-shaped cover 712 is hinged to the top of the U-shaped bracket 711.

[0028] Please see Figure 5-6 A rubber pad 713 is fixedly installed on the inner wall of the U-shaped frame 711 and the U-shaped cover 712. The ends of the U-shaped frame 711 and the U-shaped cover 712 away from the hinge are locked together by a lock head 714. A welding machine clamp 715 is installed inside the U-shaped frame 711 and the U-shaped cover 712. The tail end of the welding machine clamp 715 is connected to an external welding machine. One end of the external welding machine is connected to a robotic arm through a welding clamp. The welding machine here is an existing finished technology. Traditional welding involves manual holding of the welding clamp, which is time-consuming and laborious and can cause welding deviation. In this application, the welding machine clamp 715 can move smoothly without any jerking, ensuring that the welding will not deviate.

[0029] Please see Figure 6-7 The resistance adjustment assembly includes a base plate 716, a screw sleeve 717 installed at the bottom of the base plate 716, an adjusting bolt 718 connected to the internal thread of the screw sleeve 717, and a ball bearing 719 movably installed at the end of the adjusting bolt 718. By tightening the adjusting bolt 718, the ball bearing 719 will come close to the rod, so that the welding clamp can move smoothly on the rod.

[0030] Working principle: When in use, the cracks on the surface of the robotic arm are first removed, and a crack-stopping plate 1 is welded to the inner wall of the longitudinal base material 4. A filling plate 2 is then welded to the surface of the crack-stopping plate 1. The filling plate 2 is then welded to the longitudinal base material 4 to form a filler weld layer 6. In this application, the filling plate 2 and the crack-stopping plate 1 are made of the same material as the longitudinal base material 4, which makes the entire robotic arm strong after welding and improves the service life of the robotic arm.

[0031] The H-shaped frame 7 is pre-connected to the horizontal base material 3 via the connecting piece 71, screw 72 and locking nut A73. Then, the extension rod 74 is connected by the slide rod 75 and locking nut B. The welding clamp 715 of the welding machine is clamped on the U-shaped frame 711. Then, the U-shaped frame 711 and the U-shaped cover 712 are locked by the lock head 714.

[0032] The welding clamp 715 of the welding machine can slide horizontally on the crossbar 78 via the slide table 79, ensuring smooth welding of horizontal gaps;

[0033] At the same time, the welding clamp 715 of the welding machine can also rotate around the axis of the crossbar 78 and adjust the tilt angle to ensure the adjustment of the welding angle;

[0034] The welding clamp 715 of the welding machine can slide up and down along the slide rod 75 through the sliding sleeve 77 to ensure smooth welding of vertical welds;

[0035] This process enables the welding machine's welding clamp 715 to perform horizontal welding, vertical welding, and tilt angle adjustment, thereby ensuring smooth and quick welding.

[0036] By tightening the adjusting bolt 718, the ball 719 will press against the rod, which increases the damping force and ensures that the welding clamp 715 of the welding machine will not move easily without external force.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welded structure for patching cracks in the frame of engineering machinery, comprising a robotic arm, wherein the robotic arm is a hollow tube wall composed of two horizontal base materials (3) placed vertically and two vertical base materials (4) placed front to back, characterized in that: Holes are provided along the cracks on the surface of the longitudinal base material (4). Two symmetrically arranged anti-crack plates (1) are welded to the inner wall of the longitudinal base material (4). A horizontal plate (5) is fixedly connected between the two anti-crack plates (1). A filler plate (2) is welded to the surface of the anti-crack plate (1). A weld bevel is provided at the joint between the filler plate (2) and the longitudinal base material (4). A filler weld layer (6) is formed at the weld bevel.

2. A welding device applied to the crack repair welding structure of the engineering machinery frame as described in claim 1, comprising an H-shaped frame (7), characterized in that: Connecting pieces (71) are fixedly installed on both sides of the H-shaped frame (7). A screw (72) is inserted inside the connecting piece (71). The screw (72) is pre-welded to the cross-section base material (3). A locking nut A (73) is threadedly connected to the outside of the screw (72).

3. The welding apparatus according to claim 2, characterized in that: The tail end of the H-shaped frame (7) is slidably inserted with an extension rod (74), and the tail ends of the upper and lower extension rods (74) are inserted with a sliding rod (75). The two ends of the sliding rod (75) are threaded with locking nuts B (76).

4. The welding apparatus according to claim 3, characterized in that: A crossbar (78) is slidably connected to the outside of the slide bar (75) via a sliding sleeve (77). A slide table (79) is slidably installed on the outside of the crossbar (78). Resistance adjustment components are provided on the surface of the sliding sleeve (77) and the bottom of the slide table (79). A slant frame (710) is fixedly installed on the surface of the slide table (79). A U-shaped frame (711) is fixedly installed on the top of the slant frame (710). A U-shaped cover (712) is hinged to the top of the U-shaped frame (711).

5. The welding apparatus according to claim 4, characterized in that: Rubber pads (713) are fixedly installed on the inner walls of the U-shaped frame (711) and the U-shaped cover (712). The ends of the U-shaped frame (711) and the U-shaped cover (712) away from the hinge are engaged with each other by a lock head (714). Welding clamps (715) of a welding machine are installed inside the U-shaped frame (711) and the U-shaped cover (712).

6. The welding apparatus according to claim 4, characterized in that: The resistance adjustment assembly includes a base plate (716), a screw sleeve (717) is installed at the bottom of the base plate (716), an adjusting bolt (718) is connected to the internal thread of the screw sleeve (717), and a ball bearing (719) is movably installed at the end of the adjusting bolt (718).

7. The welding apparatus according to claim 5, characterized in that: The tail end of the welding clamp (715) of the welding machine is connected to an external welding machine, and one end of the external welding machine is connected to the robotic arm through a welding clamp.

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