A crane girder welding position transfer system and method of use

Abstract

The present application relates to a kind of crane girder welding displacement transfer system and its use method in crane girder manufacturing technical field, system includes power roller conveying device, power roller conveying device two sides are equipped with two welding stations, at least two welding supports are provided in each welding station, the side of welding support is equipped with auxiliary tooling;Auxiliary tooling includes chassis, car frame capable of moving along the longitudinal direction of chassis is equipped on chassis, displacement support is equipped above car frame, lifting mechanism is equipped between car frame and displacement support, two displacement support arms are rotatably installed in the middle of displacement support by lever shaft, the free end of two displacement support arms is respectively horizontally set on the both ends of displacement support, and can be vertically rotated under the drive of corresponding first motor;The system and its use method can economically and efficiently complete the transmission, displacement and transverse transfer operation between each process in girder production process, meet the requirements of quick connection, safe and reliable and continuous operation.

Description

Technical Field

[0001] This invention relates to the field of crane main beam manufacturing technology, and in particular to a crane main beam welding displacement transfer system and its usage method. Background Technology

[0002] With the increasing urgency in the lifting machinery manufacturing industry for efficient connection, safety, reliability, and continuous operation between various processes in product manufacturing, improving product manufacturing efficiency, enhancing safety during the manufacturing process, and effectively controlling manufacturing costs have become key areas for improvement in recent years. For the main beam of bridge and gantry cranes, due to its large size, complex structure, and diverse machining surfaces and weld positions, in order to ensure machining and welding quality and efficiency, the position of the main beam is often changed so that the machining surface faces upwards, or the weld is converted to a flat welding position for welding. However, the original operation method of relying on lifting equipment to hoist and reposition the main beam between various processes can no longer meet the current transformation and upgrading needs. Furthermore, the gripping and repositioning of robotic arms is limited by load and has high costs. The overall economic efficiency and effectiveness of the production site urgently require the construction of its conveying, repositioning, and lateral movement system and the development of its process methods. Summary of the Invention

[0003] To overcome the shortcomings in the background technology and solve the existing technical problems, this invention discloses a crane main beam welding displacement and transfer system and its usage method, which can economically and efficiently complete the transmission, displacement and lateral movement operations between various processes in the main beam production process, and meet the requirements of rapid connection, safety and reliability and continuous operation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A crane main beam welding displacement transfer system includes a power roller conveying device for transporting the main beam. Two welding stations are symmetrically arranged on both sides of the power roller conveying device. Each welding station has at least two welding supports spaced apart along the conveying direction of the power roller conveying device. One side of each welding support has auxiliary fixtures at both ends corresponding to the two welding stations. The auxiliary fixtures include a base frame that runs transversely through the power roller conveying device. A trolley frame capable of moving and positioning longitudinally along the base frame is mounted on the base frame. A displacement support is mounted above the trolley frame. A lifting mechanism capable of driving the displacement support to rise, fall, and move for positioning is provided between the trolley frame and the displacement support. Two displacement arms are rotatably mounted in the middle of the displacement support via a rod axis transversely along the base frame. Each displacement support arm has a first motor at its mounting end. The free ends of the two displacement arms are horizontally placed at both ends of the displacement support and can rotate vertically under the drive of the corresponding first motor.

[0005] Furthermore, the power roller conveying device is formed by multiple conveying unit mechanisms located on both sides of the auxiliary tooling in series.

[0006] Furthermore, two symmetrical welding stations form a working area, and the conveying direction of the power roller conveying device is provided with at least two working areas; the number of auxiliary tooling in each working area is set to two, and each auxiliary tooling is provided with a total of four welding supports on both sides.

[0007] Furthermore, the displacement support mainly consists of two side support rods and two end support rods. The two ends of the rod shaft are fixed to the middle of the two side support rods. The two displacement support arms are arranged side by side at intervals along the axial direction of the rod shaft. Each displacement support arm has an arc-shaped rack centered on the rod shaft at its mounting end. The output shaft of the first motor drives a drive gear that meshes with the corresponding arc-shaped rack.

[0008] Furthermore, the displacement support arm includes a straight plate portion with its surface perpendicular to the rod axis, and a semi-circular plate portion integrally connected to the lower side of the straight plate portion. The upper side of the straight plate portion is configured as a flat surface for supporting the main beam, and the arc edge of the semi-circular plate portion is provided with an arc-shaped toothed rack.

[0009] Furthermore, guide rods are provided at both ends of the lower surface of the displacement support, and guide sleeves adapted to slide and insert into the corresponding guide rods are provided at both ends of the upper surface of the trolley frame.

[0010] Furthermore, the lifting mechanism is provided in two symmetrical positions on both sides of the trolley frame; the lifting mechanism includes a rotating rod along the longitudinal direction of the base frame and a second motor for driving the rotating rod to rotate. The two ends of the rotating rod are provided with two external threads with opposite directions of rotation. Each external thread is screwed with a threaded sleeve. Two swing rods are symmetrically hinged to the upper and lower sides of the threaded sleeve. The outer ends of the two swing rods are respectively hinged to the displacement support and the trolley frame.

[0011] Furthermore, wheels are installed at the four corners of the lower surface of the trolley frame, and guide wheels are installed at the front and rear ends of the base frame. One of the guide wheels is driven to rotate by a third motor. One end of the trolley frame is connected to one end of the conveyor belt, and the other end of the conveyor belt passes around the two guide wheels and is fixed to the other end of the trolley frame.

[0012] Furthermore, both sides of the upper surface of the base frame are provided with wheel grooves that run longitudinally along the base frame and are adapted to the wheels.

[0013] A method for using a crane main beam welding displacement transfer system includes the following steps: S1. Multiple main beams are sequentially and intermittently hoisted and placed at the front end of the power roller conveyor, so that the length direction of the main beams is conveyed along the conveying direction, and the conveying is stopped after the previous main beam is conveyed between two welding stations; S2. The two displacement support arms of the auxiliary tooling are controlled to be horizontally erected, and the trolley frame is moved so that the installation end of one displacement support arm is correspondingly located below the previous main beam, and then the lifting mechanism is controlled to lift the displacement support frame, lifting the previous main beam from the power roller conveyor; S3. The trolley frame is moved to bring the lifted previous main beam to one side of the welding station, and then the lifting mechanism is controlled to descend, placing the previous main beam on the corresponding welding support frame, and the first welding surface of the previous main beam is flat welded; S4. After welding is completed, the lifting mechanism is controlled to... While lifting, control another displacement support arm to rotate 90 degrees to a vertical position, so as to be close to the side of the previous main beam. Then, while the moving trolley frame drives the previous main beam to move to the welding station on the other side, control the two displacement support arms to clamp the previous main beam and rotate it 90 degrees. Then control the lifting mechanism to lower and place the previous main beam on the corresponding welding support frame for flat welding of the second welding surface of the previous main beam; S5. While flat welding the second welding surface of the previous main beam, start the power roller conveyor to transport the next main beam between the two welding stations. After that, stop the conveyor. The next main beam is transported to the empty welding station in the same way as S2 and S3 for flat welding of the first welding surface; S6. After the welding of the second welding surface of the previous main beam is completed, it is transported by the empty auxiliary tooling to the power roller conveyor and transported to the rear end.

[0014] By employing the technical solution described above, the present invention has the following beneficial effects: The crane main beam welding displacement and transfer system disclosed in this invention uses auxiliary tooling to lift or lower the main beam by raising and lowering the displacement support frame, moves the main beam by controlling the trolley frame to move along the base frame, and flips the main beam by rotating the two displacement support arms. In addition, the layout design of the welding support frame and the power roller conveying device enables the transmission, displacement and lateral movement between various stations in the production process of the crane main beam, meeting the requirements of efficient connection and continuous operation between various processes. Moreover, the whole system is safe, reliable, economical and simple, and more conducive to widespread use. Attached Figure Description

[0015] Figure 1 This is a top view schematic diagram of the embodiment structure of the present invention; Figure 2 This is a schematic diagram of one usage state of the present invention; Figure 3 This is a schematic diagram of the implementation structure of the auxiliary tooling; Figure 4 yes Figure 3A top-view structural diagram; Figure 5 yes Figure 3 A schematic diagram of the side view structure; Figure 6 This is a schematic diagram of another usage state of the present invention; Figure 7 This is a schematic diagram illustrating the implementation of multiple working areas of the present invention.

[0016] In the diagram: 1. Auxiliary tooling; 101. Base frame; 102. Trolley frame; 103. Positioning support frame; 104. Positioning support arm; 105. Drive gear; 106. Arc rack; 107. Rod shaft; 108. First motor; 109. Guide rod; 110. Guide sleeve; 111. Rotating rod; 112. Screw sleeve; 113. Swing rod; 114. Second motor; 115. Wheel; 116. Guide wheel; 117. Conveyor belt; 118. Third motor; 2. Welding station; 3. Welding support frame; 4. Power roller conveyor device. Detailed Implementation

[0017] The technical solution of the present invention will be described below with reference to the accompanying drawings of the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the accompanying drawings of the present invention for the convenience of describing the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation.

[0018] Combined with appendix Figure 1-6 The crane main beam welding displacement and transfer system includes a power roller conveyor 4 for transporting the main beam. The power roller conveyor 4 is a type of roller conveyor, using electric power to achieve continuous transport of goods; it is an existing device and will not be described in detail here. Two welding stations 2 are symmetrically arranged on both sides of the power roller conveyor 4. Each welding station 2 has at least two welding supports 3 spaced apart along the conveying direction of the power roller conveyor 4, ensuring that the main beam is stably supported by at least two welding supports 3 at each welding station 2. One side of each welding support 3 has an auxiliary fixture 1 with its two ends corresponding to the two welding stations 2. The auxiliary fixture 1 is used to transfer the main beam between the two welding stations 2 and the power roller conveyor 4. Specifically, the power roller conveyor 4 is formed by multiple conveying unit mechanisms connected in series on both sides of the auxiliary fixture 1, as shown in the attached diagram. Figure 1 In order to allow the auxiliary tooling 1 to pass through, the power roller conveying device 4 is not set continuously. If there are two auxiliary tooling 1, then three conveying unit mechanisms will be set in series. Since the length of the main beam is much greater than the width of the auxiliary tooling 1, even if there is no power roller above the auxiliary tooling 1, it will not hinder the conveying. As attached Figure 3 , 4As shown in Figure 5, the auxiliary tooling 1 includes a base frame 101 that runs through the power roller conveyor 4. A trolley frame 102 capable of moving and positioning longitudinally along the base frame 101 is mounted on the base frame 101. Depending on the needs, wheels 115 are installed at the four corners of the lower surface of the trolley frame 102, and guide wheels 116 are installed at the front and rear ends of the base frame 101. To prevent the conveyor belt 117 from interfering with the frame, multiple guide wheels 116 can be arranged at different heights. One guide wheel 116 is driven to rotate by a third motor 118. Specifically, the body of the third motor 118 is fixedly mounted on the trolley frame 102, and the output shaft of the third motor 118 is connected to the... The guide wheels 116 are coaxially connected to the axle, or connected via gear transmission. One end of the trolley frame 102 is connected to one end of the conveyor belt 117. The other end of the conveyor belt 117 passes around the two guide wheels 116 and is fixed to the other end of the trolley frame 102. This allows the guide wheels 116 to drive the conveyor belt 117 to move, thereby driving the trolley frame 102 to move. The guide wheels 116 and the conveyor belt 117 can be sprockets and chains to prevent slippage and facilitate positioning and stopping. In addition, the upper surface of the base frame 101 has wheel grooves on both sides that run longitudinally along the base frame 101 and are adapted to the wheels 115 to prevent the trolley frame 102 from shifting. A displacement support frame 103 is provided above the trolley frame 102. A lifting mechanism is provided between the trolley frame 102 and the displacement support frame 103, which can drive the displacement support frame 103 to move and position. By lifting and lowering through the lifting mechanism, the main beam can be lifted or lowered from the welded support frame 3, so as to pick up and put down the main beam and facilitate the movement and transfer of the main beam in coordination with the trolley frame 102. As needed, the lifting mechanism includes a rotating rod 111 along the longitudinal direction of the base frame 101 and a second motor 114 that drives the rotating rod 111 to rotate. Specifically, the body of the second motor 114 is fixedly installed on the trolley frame 102, and the output shaft of the second motor 114 is coaxially connected and fixed to one end of the rotating rod 111, or connected through gear transmission. The two ends of the rotating rod 111 are provided with two external threads with opposite directions of rotation. Each external thread is screwed with a threaded sleeve 112. Two swing arms 113 are symmetrically hinged on the upper and lower sides of the 2. The outer ends of the two swing arms 113 are respectively hinged to the displacement support 103 and the trolley frame 102. The two swing arms 113 restrict the rotation of the screw sleeve 112. When the rotating rod 111 rotates, the screw sleeve 112 can move along the axis 107 of the rotating rod 111, thereby driving the two swing arms 113 to swing up or down to become a support. In addition, guide rods 109 are provided at both ends of the lower surface of the displacement support 103, and guide sleeves 110 are provided at both ends of the upper surface of the trolley frame 102 to slide and insert into the corresponding guide rods 109. Through the cooperation of the guide rods 109 and the guide sleeves 110, the lifting stability of the displacement support 103 can be ensured and the shaking can be prevented. Furthermore, two lifting mechanisms are provided and symmetrically arranged on both sides of the trolley frame 102 to ensure the stability of the lifting support. Two displacement support arms 104 are rotatably mounted in the middle of the displacement support frame 103 via a rod shaft 107 extending transversely along the base frame 101. Each displacement support arm 104 is equipped with a first motor 108 at its mounting end. The free ends of the two displacement support arms 104 are horizontally positioned at both ends of the displacement support frame 103, and both can rotate vertically under the drive of the corresponding first motor 108. Thus, when the main beam is placed on one displacement support arm 104, the other displacement support arm can rotate vertically to lie against one side of the main beam. Then, the two displacement support arms 104 bear the load at a 90-degree angle. The main beam is rotated 90 degrees synchronously and then flipped 90 degrees, placing it on another displacement support arm 104 to achieve the purpose of flat welding on each side of the main beam. As needed, the displacement support frame 103 mainly consists of two side support rods and two end support rods. The two ends of the rod shaft 107 are fixed to the middle of the two side support rods. The two displacement support arms 104 are arranged side-by-side at intervals along the axial direction of the rod shaft 107. Each displacement support arm 104 has a rotating hole at its mounting end and is rotatably fitted onto the rod shaft 107. Furthermore, each displacement support arm 104 has a mounting end with a hole oriented along the axis of the rod shaft 107. The first motor 108 has an arc-shaped rack 106 with an arc-shaped centerline. Its output shaft drives a corresponding drive gear 105 that meshes with the corresponding arc-shaped rack 106. The body of the first motor 108 can be suspended and fixed below the displacement support 103 via a boom. By controlling the rotation of the drive gear 105, the displacement support arm 104 is driven to rotate. Alternatively, a gear transmission connection can be set between the first motor 108 and the drive gear 105 depending on the distance between them. Furthermore, the displacement support arm 104 includes a straight plate portion with its surface perpendicular to the rod shaft 107. The semi-circular plate is integrally connected to the lower side of the straight plate. The upper side of the straight plate is set as a flat surface for supporting the main beam. The arc edge of the semi-circular plate is provided with an arc-shaped toothed rack 106. While ensuring the overall structural strength, it also ensures that the upper side is horizontal when the free end of the displacement support arm 104 rests on the end frame rod of the displacement support frame 103. In addition, when the displacement support frame 103 is controlled to a low position by the lifting mechanism, the height of the displacement support arm 104 horizontally erected at the corresponding end of the displacement support frame 103 is lower than the height of the conveying surface of the power roller conveying device 4 and the support surface of the welded support frame 3.

[0019] As required, as attached Figure 7 As shown, two symmetrical welding stations 2 form a working area, and the conveying direction of the power roller conveying device 4 is provided with at least two working areas; the number of auxiliary tooling 1 in each working area is set to two, and each auxiliary tooling 1 is provided with four welding supports 3 on both sides to ensure that the support and transfer of the main beam is more stable. The two working areas ensure the continuity of the processing and welding of the four processing sides during the main beam conveying process.

[0020] A method for using a crane main beam welding displacement transfer system includes the following steps: Step 1: Place multiple main beams sequentially and at intervals at the front end of the power roller conveyor 4, so that the main beams are conveyed along the conveying direction in the length direction, and stop conveying after the previous main beam is conveyed between the two welding stations 2. Step 2: Control the two displacement support arms 104 of the auxiliary tooling 1 to be horizontally erected, and move the trolley frame 102 so that the installation end of one displacement support arm 104 is located below the previous main beam. Then control the lifting mechanism to lift the displacement support frame 103 and lift the previous main beam from the power roller conveyor device 4. Step 3: Move the trolley frame 102 to bring the lifted main beam to the welding station 2 on one side, then control the lifting mechanism to lower it and place the main beam on the corresponding welding support 3. Perform flat welding on the first welding surface of the main beam. At this time, the main beam has not yet been flipped. Step 4: After welding is completed, while controlling the lifting mechanism to lift, control another displacement support arm 104 to rotate 90 degrees to a vertical position so as to be close to the side of the previous main beam. Then, while the moving trolley frame 102 drives the previous main beam to the welding station 2 on the other side, control the two displacement support arms 104 to clamp the previous main beam and rotate it 90 degrees in the opposite direction. Then control the lifting mechanism to lower and place the previous main beam on the corresponding welding support 3. Perform flat welding on the second welding surface of the previous main beam. Step 5: While performing flat welding on the second welding surface of the previous main beam, start the power roller conveyor 4 to transport the next main beam to the area between the two welding stations 2, then stop the conveying. The next main beam is transported to the empty welding station 2 in the same manner as S2 and S3 for flat welding of the first welding surface. Step 6: After the first main beam is welded on the second welding surface, it is transported by the empty auxiliary tooling 1 to the power roller conveyor 4 and conveyed to the rear end. If continuous operation is required, the reasonable planning of one work area is to complete the welding of two surfaces of the main beam. If all four surfaces need to be processed and welded, then setting up two work areas is more reasonable.

[0021] The parts of this invention not described in detail are prior art. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this invention is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims within this invention, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A crane main beam welding displacement transfer system, characterized in that: The system includes a power roller conveyor (4) for conveying the main beam. Two welding stations (2) are symmetrically arranged on both sides of the power roller conveyor (4). Each welding station (2) has at least two welding supports (3) spaced apart along the conveying direction of the power roller conveyor (4). One side of each welding support (3) has an auxiliary fixture (1) corresponding to the two welding stations (2). The auxiliary fixture (1) includes a base frame (101) that traverses the power roller conveyor (4). A trolley frame (102) capable of longitudinally moving and positioning along the base frame (101) is provided on the base frame (101). 102) A displacement support frame (103) is provided above. A lifting mechanism is provided between the trolley frame (102) and the displacement support frame (103) to drive the displacement support frame (103) to move and position. Two displacement support arms (104) are rotatably installed in the middle of the displacement support frame (103) through a rod shaft (107) along the transverse direction of the base frame (101). Each displacement support arm (104) is provided with a first motor (108) at its mounting end. The free ends of the two displacement support arms (104) are horizontally placed at both ends of the displacement support frame (103) and can rotate vertically under the drive of the corresponding first motor (108).

2. The crane main beam welding displacement transfer system according to claim 1, characterized in that: The power roller conveying device (4) is formed by multiple conveying unit mechanisms located on both sides of the auxiliary tooling (1) in series.

3. The crane main beam welding displacement transfer system according to claim 1, characterized in that: Two symmetrical welding stations (2) form a working area. The conveying direction of the power roller conveying device (4) is provided with at least two working areas. The number of auxiliary tooling (1) in each working area is set to two, and each auxiliary tooling (1) is provided with four welding supports (3) on both sides.

4. The crane main beam welding displacement transfer system according to claim 1, characterized in that: The displacement support frame (103) is mainly composed of two side support rods and two end support rods. The two ends of the rod shaft (107) are fixed to the middle of the two side support rods. The two displacement support arms (104) are arranged side by side at intervals along the axial direction of the rod shaft (107). Each displacement support arm (104) is provided with an arc-shaped rack (106) centered on the rod shaft (107) at its mounting end. The output shaft of the first motor (108) is driven to connect to a drive gear (105) that meshes with the corresponding arc-shaped rack (106).

5. The crane main beam welding displacement transfer system according to claim 4, characterized in that: The displacement support arm (104) includes a straight plate portion with the plate surface perpendicular to the rod axis (107), and a semi-circular plate portion integrally connected to the lower side of the straight plate portion. The upper side of the straight plate portion is set as a flat surface for supporting the main beam, and the arc edge of the semi-circular plate portion is provided with an arc-shaped toothed rack (106).

6. The crane main beam welding displacement transfer system according to claim 1, characterized in that: The lower surface of the displacement support (103) is provided with guide rods (109) at both ends, and the upper surface of the trolley frame (102) is provided with guide sleeves (110) that are adapted to slide and insert into the corresponding guide rods (109) at both ends.

7. The crane main beam welding displacement transfer system according to claim 1, characterized in that: The lifting mechanism is provided in two symmetrical positions on both sides of the trolley frame (102); the lifting mechanism includes a rotating rod (111) along the longitudinal direction of the base frame (101) and a second motor (114) for driving the rotating rod (111) to rotate. The two ends of the rotating rod (111) are provided with two external threads with opposite directions of rotation. Each external thread is screwed with a threaded sleeve (112). The upper and lower sides of the threaded sleeve (112) are symmetrically hinged with two swing rods (113). The outer ends of the two swing rods (113) are respectively hinged to the displacement support frame (103) and the trolley frame (102).

8. The crane main beam welding displacement transfer system according to claim 1, characterized in that: The lower surface of the trolley frame (102) is equipped with wheels (115) at all four corners. The front and rear ends of the base frame (101) are equipped with guide wheels (116). One of the guide wheels (116) is driven to rotate by a third motor (118). One end of the trolley frame (102) is connected to one end of the conveyor belt (117). The other end of the conveyor belt (117) passes around the two guide wheels (116) and is fixed to the other end of the trolley frame (102).

9. The crane main beam welding displacement transfer system according to claim 8, characterized in that: Both sides of the upper surface of the base frame (101) are provided with wheel grooves that run longitudinally along the base frame (101) and are adapted to the wheels (115).

10. A method of using the crane main beam welding displacement transfer system as described in claim 1, characterized in that: it includes... The following steps: S1. Multiple main beams are hoisted and placed at intervals at the front end of the power roller conveyor (4) so ​​that the length of the main beam is conveyed along the conveying direction and the conveying is stopped after the previous main beam is conveyed between the two welding stations (2). S2. Control the two displacement arms (104) of the auxiliary tooling (1) to be horizontally erected, and move the trolley frame (102) so that the installation end of one displacement arm (104) is located below the previous main beam. Then control the lifting mechanism to lift the displacement support frame (103) and lift the previous main beam from the power roller conveyor device (4). S3. Move the trolley frame (102) to bring the lifted main beam to the welding station (2) on one side, then control the lifting mechanism to descend and place the main beam on the corresponding welding support (3) to perform flat welding on the first welding surface of the main beam. S4. After welding is completed, while controlling the lifting mechanism to lift, control another displacement support arm (104) to rotate 90 degrees to be vertical, so as to be close to the side of the previous main beam. Then, while the moving trolley frame (102) drives the previous main beam to move to the welding station (2) on the other side, control the two displacement support arms (104) to hold the previous main beam and rotate 90 degrees. Then control the lifting mechanism to lower and place the previous main beam on the corresponding welding support frame (3) to perform flat welding on the second welding surface of the previous main beam. S5. While performing flat welding on the second welding surface of the previous main beam, start the power roller conveyor (4) to transport the next main beam to the two welding stations (2), then stop the conveying. The next main beam is transported to the empty welding station (2) in the same way as S2 and S3 for flat welding of the first welding surface. S6. After the first main beam is welded on the second welding surface, it is transported by the empty auxiliary tooling (1) to the power roller conveyor (4) and conveyed to the rear end.

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