A welding device for cast production

Abstract

The present disclosure relates to the technical field of casting welding, and one embodiment of the present disclosure provides a welding device for casting production, which comprises a seating base and a valve body supporting device, the valve body supporting device is fixedly connected to the seating base, and the valve body supporting device is used for supporting the valve body after the valve body is butted with a joint; the valve body supporting device comprises a supporting base, a dynamic supporting mechanism and a sliding supporting mechanism, the supporting base is vertically and slidingly connected to the seating base, a plurality of through holes are formed in the supporting base, a plurality of sliding supporting mechanisms are arranged on the dynamic supporting mechanism, the dynamic supporting mechanism is used for adjusting the sliding supporting mechanisms to support the valve, and the sliding supporting mechanisms are in contact with the valve body by penetrating the through holes and are used for dynamically supporting the valve body; through the above technical solution, the technical problem that the welds are uneven when the valve body is rotationally welded due to the uneven surface of the valve body in the related art is solved.

Description

Technical Field

[0001] The embodiments of this disclosure relate to the field of casting welding technology, and more specifically, to a welding apparatus for casting production. Background Technology

[0002] In the production of castings, welding is mainly used to repair defects that occur during the casting process, or to weld structural connections, such as valves, pipes, and flanges. Welding is often used to connect dissimilar metals or joints after casting. Most manufacturers currently use welding machines to automatically weld valves and joints.

[0003] The valve body can be clamped and fixed on the automatic welding machine. Then the valve body is placed on the welding machine and the valve body and the joint are connected accordingly. The valve body is rotated by rotating the joint, and the welding head is driven by the robotic arm to weld the weld. The weld quality obtained in this way is relatively high. However, since the valve body is made by casting, the surface of the casting will be uneven. When supporting the valve body during rotation, contact with the uneven parts of the valve body surface may cause the valve body to deflect, resulting in uneven gaps at the weld joint. This leads to uneven weld width and hardness, which affects the quality of the valve. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of this disclosure provide a welding apparatus for casting production, which solves the technical problem in the related art that the unevenness of the valve body surface may lead to uneven welds during valve body rotation welding.

[0005] According to one aspect, at least one embodiment of this disclosure provides a welding apparatus for casting production, including a base, a clamping device, and a robotic arm. The clamping device is fixedly mounted on the base and is used to clamp and fix a joint. A welding torch is fixedly mounted on the robotic arm. The apparatus also includes a mounting base and a valve body support device. The mounting base is fixedly connected to the base on a side away from the clamping device. The valve body support device is fixedly connected to the mounting base. After the valve body is connected to the joint, the valve body support device is used to support the valve body. The valve body support device includes a support base, a dynamic support mechanism, and a sliding support mechanism. The support base is vertically slidably connected to the mounting base and has multiple through holes. The dynamic support mechanism is fixedly disposed on the mounting base and is located below the support base. The dynamic support mechanism has multiple sliding support mechanisms, which are used to adjust the sliding support mechanisms to support the valve. The sliding support mechanisms pass through the through holes and contact the valve body, providing dynamic support for the valve body.

[0006] The support base is provided with a first rotating wheel, a second rotating wheel, and a through hole. The first rotating wheel is rotatably connected to the center of the support base and can contact the valve. There are two second rotating wheels, which are respectively located at both ends of the support base. The through hole is opened between the first rotating wheel and the second rotating wheel.

[0007] The dynamic support mechanism includes a first drive cylinder, a second drive cylinder, and a lifting assembly. The first drive cylinder is fixedly installed on the mounting base and is located below the support base. The output end of the first drive cylinder extends and retracts in the vertical direction. The second drive cylinder is rotatably installed on the mounting base and is located to the side of the first drive cylinder. The lifting assembly is fixedly connected to the output end of the first drive cylinder and is rotatably connected to multiple sliding support mechanisms. The lifting assembly is used to drive the sliding support mechanisms to move vertically up and down. The output end of the second drive cylinder is rotatably connected to one of the frames.

[0008] The lifting assembly includes a rotating frame and support rods. The rotating frame is fixedly connected to the output end of the drive cylinder. Multiple support rods are provided, and the center of each of the multiple support rods is rotatably connected to the rotating frame. The multiple support rods are respectively provided on both sides of the rotating frame. Multiple sliding support mechanisms are rotatably connected to the support rods, and the multiple sliding support mechanisms remain parallel to each other.

[0009] The sliding support mechanism includes a frame, a sliding frame, and a rotating wheel frame. The frame is rotatably connected to the support rod. Multiple sliding frames are provided, and multiple sliding frames are fixedly connected to the frame on the side near the valve body. Multiple rotating wheel frames are provided, and the rotating wheel frames are vertically slidably connected to the sliding frames. Support wheels are rotatably connected to the rotating wheel frames, and rubber pads are sleeved on the support wheels.

[0010] A spring plate is rotatably connected to the sliding frame. The rotating wheel frame is positioned above the spring plate and in contact with it. A displacement sensor is fixedly installed on the sliding frame. The displacement sensor is positioned below the spring plate, and its output end is in contact with the spring plate.

[0011] A slide rail is fixedly connected to the center of the support base near the drive cylinder one. The rotating shaft frame is slidably connected to the slide rail. When the output ends of drive cylinder one and drive cylinder two are shortened, the rotating wheel one and the rotating wheel two can contact the valve body.

[0012] The beneficial effects of the embodiments disclosed herein are as follows:

[0013] 1. In this invention, a support base is set up to place the welded parts and the welded valve body. During welding, the support base does not contact the valve body. The valve body is dynamically supported by a dynamic support mechanism and a sliding support mechanism to keep the valve body supported in different states. At the same time, the support base can also serve as a safety support device for the valve body.

[0014] 2. In this invention, by setting a dynamic support mechanism and a sliding support mechanism, when supporting the valve body, it is possible to determine whether the valve body is offset based on the different pressures exerted on both sides of the valve body, and to determine whether it is valve body offset or surface unevenness. Based on the pressure changes during support, dynamic adjustments are made to ensure that the valve body and the connector rotate concentrically. Compared with the traditional valve body support method on welding machines, this application provides dynamic support, avoiding the problem of uneven welding surface caused by the valve body surface being unable to be effectively supported during rotation due to irregularities. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure from another perspective of the present invention;

[0018] Figure 3 This is a cross-sectional view of the valve body support device in this invention.

[0019] Figure 4 This is a structural schematic diagram of the valve body support device from another perspective in this invention;

[0020] Figure 5 This is a cross-sectional view of the structure in which the rotating shaft frame and the slide rail cooperate in this invention;

[0021] Figure 6 This is a schematic diagram of the internal cross-sectional structure of the sliding frame in this invention.

[0022] In the diagram: 1. Base; 2. Clamping device; 3. Robotic arm; 4. Mounting seat; 5. Support base; 6. Through hole; 7. Rotary wheel one; 8. Rotary wheel two; 9. Drive cylinder one; 10. Drive cylinder two; 11. Rotary shaft frame; 12. Support rod; 13. Frame; 14. Sliding frame; 15. Rotary wheel frame; 16. Support wheel; 17. Spring plate; 18. Displacement sensor; 19. Rubber pad layer; 20. Slide rail. Detailed Implementation

[0023] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0024] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0025] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0026] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0028] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] like Figures 1-6 The diagram illustrates a welding apparatus for casting production according to an embodiment of this disclosure. It includes a base 1, a clamping device 2, and a robotic arm 3. The clamping device 2 is fixedly mounted on the base 1 and is used to clamp and fix the joint. A welding torch is fixedly mounted on the robotic arm 3. The apparatus also includes a mounting base 4 and a valve body support device. The mounting base 4 is fixedly connected to the base 1 on the side away from the clamping device 2. The valve body support device is fixedly connected to the mounting base 4. After the valve body is connected to the joint, the valve body support device supports the valve body. The valve body support device includes a support base 5, a dynamic support mechanism, and a sliding support mechanism. The support base 5 is vertically and slidably connected to the mounting base 4 and has multiple through holes 6. The dynamic support mechanism is fixedly mounted on the mounting base 4. A dynamic support mechanism is located below the support base 5. Multiple sliding support mechanisms are installed on the dynamic support mechanism. The dynamic support mechanism is used to adjust the sliding support mechanisms to support the valve. The sliding support mechanisms pass through the through hole 6 and contact the valve body. The sliding support mechanisms provide dynamic support to the valve body. In this application, the support base 5 serves as a fixed valve body support frame, supporting the valve body when welding is not being performed. When welding is being performed, the valve body support device provides dynamic support. When encountering depressions or protrusions on the valve body surface, or irregularly shaped parts, the state of the valve body can be controlled by adjusting the two sliding support mechanisms. Compared to traditional welding machines that can only use fixed rollers to support the valve body, this design can adapt to irregular surfaces on the valve body to complete the welding.

[0030] like Figures 1-4As shown, the support base 5 is provided with a first rotating wheel 7, a second rotating wheel 8, and a through hole 6. The first rotating wheel 7 is rotatably connected to the center of the support base 5 and can contact the valve. There are two second rotating wheels 8, which are respectively located at both ends of the support base 5. The through hole 6 is opened between the first rotating wheel 7 and the second rotating wheel 8. In this embodiment, the two second rotating wheels 8 are respectively located at both ends of the support base 5. When the valve body is welded, the support base 5 is below the valve body. On the one hand, it is used to support the valve body when welding is not performed, and on the other hand, it serves as a support when the valve is removed after welding is completed. There are two through holes 6. After the sliding support mechanism descends in the through holes 6, the valve can be placed on the first rotating wheel 7 and the second rotating wheel 8.

[0031] like Figures 3-5 As shown, the dynamic support mechanism includes a drive cylinder 9, a drive cylinder 10, and a lifting assembly. Drive cylinder 9 is fixedly mounted on the mounting base 4 and positioned below the support base 5. The output end of drive cylinder 9 extends and retracts vertically. Drive cylinder 10 is rotatably mounted on the mounting base 4 and positioned to the side of drive cylinder 9. The lifting assembly is fixedly connected to the output end of drive cylinder 9 and rotatably connected to multiple sliding support mechanisms. The lifting assembly is used to drive the sliding support mechanisms to move vertically up and down. The output end of drive cylinder 10 is rotatably connected to one of the frames 13. The lifting assembly includes a rotating shaft frame 11 and support rods 12. The rotating shaft frame 11 is fixedly connected to the output end of drive cylinder 9. Multiple support rods 12 are provided, and the center of each support rod 12 is rotatably connected to the rotating shaft frame 11. The support rods 12 are rotatably connected to the support rods 12 on both sides of the rotating frame 11. The support rods 12 are parallel to each other. When the output end of the drive cylinder 19 extends, the support rods 12 can be pushed upward through the rotating frame 11. The support rods 12 drive the two frames 13 to move upward until the two sliding support mechanisms are in contact with the valve body. At this time, the valve body is supported by the drive cylinder 19. In this embodiment, there are four support rods 12, two on each side of the frame 13. The support rods 12 form a seesaw-like structure, so that when the protrusion on the valve surface squeezes the support wheel 16 on one side, the support rods 12 and the rotating frame 11 support the valve body upward through the support wheel 16 on the other side, maintaining the balance of the valve body. At the same time, the height of the two frames 13 can be adjusted by extending and retracting the output end of the drive cylinder 10.

[0032] like Figures 3-6As shown, the sliding support mechanism includes a frame 13, a sliding frame 14, and a rotating wheel frame 15. The frame 13 is rotatably connected to the support rod 12. Multiple sliding frames 14 are provided, and multiple sliding frames 14 are fixedly connected to the frame 13 on the side near the valve body. Multiple rotating wheel frames 15 are provided, and rotating wheel frames 15 are vertically slidably connected to the sliding frames 14. Support wheels 16 are rotatably connected to the rotating wheel frames 15. A rubber pad is provided on the support wheels 16. The rubber pad can adaptively support small unbalanced positions. In this embodiment, there are two sliding frames 14 and two rotating wheel frames 15. Both support wheels 16 are in contact with the valve body, and the two support wheels 16 support the valve body on the frame 13 respectively.

[0033] like Figure 6 As shown, a spring plate 17 is rotatably connected to the sliding frame 14. A rotating wheel frame 15 is positioned above and in contact with the spring plate 17. A displacement sensor 18 is fixedly mounted on the sliding frame 14 and positioned below the spring plate 17. The output end of the displacement sensor 18 is in contact with the spring plate 17. When the support wheel 16 contacts the valve body, the valve body presses down on the support wheel 16, causing the rotating wheel frame 15 to slide downwards on the sliding frame 14. The rotating wheel frame 15 compresses the spring plate 17, causing the spring plate 17 to bend. At this time, the displacement sensor 18 can measure the degree of bending of the spring plate 17. When one of the two displacement sensors 18 on the same frame 13 detects a change in the degree of bending of the spring plate 17, it can be known that a small area of ​​surface unevenness has occurred on the valve body. When both displacement sensors 18 detect a change in the same direction in the spring plate 17, it can be known that a large change has occurred in the surface curvature of the valve body. It can be compared with the shape that the valve body should have to determine whether there is a large deviation in the curvature of the valve body surface and whether the output end of the drive cylinder 10 needs to be adjusted.

[0034] like Figures 5-6 As shown, a slide rail 20 is fixedly connected to the center of the support base 5 near the drive cylinder 9. The rotating shaft frame 11 is slidably connected to the slide rail 20. When the output ends of the drive cylinder 9 and the drive cylinder 10 are shortened, the rotating wheel 7 and the rotating wheel 8 can contact the valve body. When the output end of the drive cylinder 9 drives the rotating shaft frame 11 to move vertically, the rotating shaft frame 11 slides vertically on the slide rail 20 to avoid lateral force on the output end of the drive cylinder 9 when the support wheels 16 on both sides support the valve body.

[0035] In some examples, the height of the support base 5 is adjusted, and the valve body is placed on the first rotating wheel 7 and the second rotating wheel 8. Then, the valve body is connected to the connector. At this time, the output ends of the first driving cylinder 9 and the second driving cylinder 10 are extended, and the support wheels 16 on both sides of the valve body support the valve body. The bending degree of the spring plate 17 is detected by four displacement sensors 18 on both sides, thereby determining the pressure of the valve body on the support wheel 16 and whether the pressure on the support wheels 16 on both sides is balanced. The frame 13 can be moved by the output end of the second driving cylinder 10 to adjust the support of the valve body on both sides of the support wheel 16 to achieve a balanced state. When the uneven surface of the valve body contacts the rubber pad layer, the spring plate 17 is squeezed by the support wheel 16. The pressure on the support wheel 16 is determined by the detection of the bending degree of the spring plate 17 by the displacement sensor 18. Then, the valve body is supported by the cooperation of the first driving cylinder 9 and the second driving cylinder 10 to keep the valve body rotating concentrically with the connector at all times.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A welding apparatus for casting production, comprising a base (1), a clamping device (2), and a robotic arm (3), wherein the clamping device (2) is fixedly mounted on the base (1) and is used to clamp and fix a joint, and a welding torch is fixedly mounted on the robotic arm (3), characterized in that, Also includes: The mounting base (4) is fixedly connected to the base (1) on the side away from the clamping device (2); The valve body support device is fixedly connected to the mounting base (4). After the valve body is connected to the connector, the valve body support device is used to support the valve body. The valve body support device includes: The support base (5) is vertically slidably connected to the mounting base (4), and the support base (5) has multiple through holes (6). A dynamic support mechanism is fixedly installed on the mounting base (4). The dynamic support mechanism is located below the support base (5). The dynamic support mechanism is provided with multiple sliding support mechanisms. The dynamic support mechanism is used to adjust the sliding support mechanisms to support the valve body. The sliding support mechanism passes through the through hole (6) and contacts the valve body. The sliding support mechanism is used to provide dynamic support for the valve body. The dynamic support mechanism includes: Drive cylinder 1 (9) is fixedly installed on the mounting base (4). Drive cylinder 1 (9) is located below the support base (5). The output end of drive cylinder 1 (9) extends and retracts in the vertical direction. Drive cylinder two (10) is rotatably mounted on the mounting seat (4), and drive cylinder two (10) is located to the side of drive cylinder one (9); The lifting assembly is fixedly connected to the output end of the drive cylinder (9). The lifting assembly is rotatably connected to the multiple sliding support mechanisms. The lifting assembly is used to drive the sliding support mechanisms to move vertically up and down. The lifting component includes: The rotating frame (11) is fixedly connected to the output end of the drive cylinder (9); Multiple support rods (12) are provided, and the center of each of the multiple support rods (12) is rotatably connected to the rotating shaft frame (11). The multiple support rods (12) are respectively provided on both sides of the rotating shaft frame (11). The multiple sliding support mechanisms are rotatably connected to the support rod (12), and the multiple sliding support mechanisms remain parallel to each other.

2. The welding apparatus for casting production according to claim 1, characterized in that, The support base (5) is provided with: Rotary wheel 1 (7) is rotatably connected to the center of the support base (5), and the rotary wheel 1 (7) can contact the valve body; There are two rotating wheels (8), and the two rotating wheels (8) are respectively disposed at both ends of the support base (5); The through hole (6) is formed between the first rotating wheel (7) and the second rotating wheel (8).

3. The welding apparatus for casting production according to claim 2, characterized in that, The sliding support mechanism includes: The frame (13) is rotatably connected to the support rod (12); Multiple sliding frames (14) are provided, and multiple sliding frames (14) are fixedly connected to the frame (13) on the side near the valve body; Multiple wheel frames (15) are provided. The wheel frames (15) are vertically slidably connected to the sliding frame (14). Support wheels (16) are rotatably connected to the wheel frames (15).

4. A welding apparatus for casting production according to claim 3, characterized in that, A spring plate (17) is rotatably connected to the sliding frame (14). The rotating wheel frame (15) is located above the spring plate (17) and in contact with the spring plate (17). A displacement sensor (18) is fixedly installed on the sliding frame (14). The displacement sensor (18) is located below the spring plate (17), and the output end of the displacement sensor (18) is in contact with the spring plate (17).

5. A welding apparatus for casting production according to claim 3, characterized in that, A rubber pad (19) is fitted on the support wheel (16).

6. A welding apparatus for casting production according to claim 3, characterized in that, The output end of the second drive cylinder (10) is rotatably connected to one of the frames (13).

7. A welding apparatus for casting production according to claim 1, characterized in that, A slide rail (20) is fixedly connected to the center of the support base (5) near the drive cylinder (9), and the rotating frame (11) is slidably connected to the slide rail (20).

8. A welding apparatus for casting production according to claim 2, characterized in that, When the output ends of the first drive cylinder (9) and the second drive cylinder (10) are shortened, the first rotor (7) and the second rotor (8) can come into contact with the valve body.

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