A plasma arc welding machine for steel structures

Abstract

This invention provides a plasma arc welding machine for steel structures, belonging to the field of welding machine technology. It includes a base plate, a support assembly, a lifting assembly, a moving assembly, a clamping assembly, a guiding assembly, a driving assembly, and a welding assembly. The support assembly is located at both the inlet and outlet ends of the base plate to support the steel structure product. The lifting assembly is located in the middle of the base plate to provide lifting functionality. The moving assembly is located on the base plate to provide moving functionality. The clamping assembly is located on the moving assembly to clamp the steel structure product. The guiding assembly is located on the clamping part of the clamping assembly to guide and buffer the steel structure product. The driving assembly is located on the moving assembly to drive the clamping assembly to rotate. Through the designed lifting and welding assemblies, the machine can automatically follow the shape of the steel structure product during welding operations, eliminating the need for frequent control of the welding torch position and improving welding quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding machine technology, specifically to a plasma arc welding machine for steel structures. Background Technology

[0002] Plasma arc welding machines are high-efficiency welding equipment based on plasma arc technology. They use a high-temperature compressed electric arc as a heat source to achieve precision welding. When producing steel structures such as square tubes, it is often necessary to weld the end faces of the steel structures, which often requires the use of plasma arc welding machines.

[0003] In related technologies, such as CN117983940B, there is an automatic plasma welding mechanism for steel structures, including a base plate and a welding machine. The welding machine includes a connected body and a welding gun body. A worktable is provided on the top of the base plate, and a motor is installed on the outer wall of the worktable. The worktable includes a U-shaped plate located below the welding gun body and fixedly connected to the top of the welding machine. The top of the U-shaped plate has a mounting hole. An adjustment mechanism is used for positioning and clamping different types of steel, and the adjustment mechanism is connected to the mounting hole.

[0004] The aforementioned welding mechanism can clamp different types of steel structures. However, the distance between the welding torch and the steel workpiece is difficult to control and cannot adapt to the shape changes of the workpiece during rotation, thus affecting the welding quality. Frequent control of the welding torch height also affects the welding efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a plasma arc welding machine for steel structures, which solves the problem of the welding torch failing to follow the workpiece's rotation and change in shape.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a plasma arc welding machine for steel structures, comprising a base plate, and further comprising: Support components are located at both ends of the bottom plate for supporting steel structure products; A lifting assembly, located in the middle of the base plate, is used to provide a lifting function; A movable component, disposed on a base plate, for providing mobility; A clamping assembly, which is disposed on a movable assembly, is used to clamp steel structure products; A guiding component, which is disposed on the clamping part of the clamping component, is used to guide and cushion the steel structure product; A driving component, which is disposed on the moving component, is used to drive the clamping component to rotate. The welding assembly, mounted on the lifting component of the lifting assembly, provides the function of automatically following the shape of the steel structure product during welding. Through the lifting and welding assemblies, the welding operation can automatically follow the shape of the steel structure product, eliminating the need for frequent control of the welding torch position and improving welding quality and efficiency. The clamping and guiding assemblies provide buffering and clamping functions for the steel structure product, facilitating material handling and processing.

[0007] Preferably, the support assembly includes a support column, and a support roller is rotatably connected to the upper part of the support column.

[0008] Preferably, the lifting assembly includes a mounting frame, which is fixedly mounted on the base plate. A lifting push rod is fixedly mounted on the mounting frame, and the output end of the lifting push rod is fixedly connected to a lifting frame. A lifting lug is fixedly connected to the lower part of the lifting frame.

[0009] Preferably, the moving component includes a moving track and a hydraulic cylinder fixedly installed on the base plate. A moving seat is slidably connected to the moving track. A connecting plate is fixedly connected to the output end of the hydraulic cylinder. The connecting plate is fixedly connected to the moving seat. An annular groove is provided on the moving seat.

[0010] Preferably, the clamping assembly includes a rotating ring, the outer ring of which is fixedly connected to an outer slide rail, the outer slide rail slidingly engaging with a ring groove, the inner ring of which is fixedly connected to an inner slide rail, a mounting slide block slidably connected to the inner slide rail, a clamping push rod mounted on the mounting slide block, a clamping claw fixedly connected to the output end of the clamping push rod, a preset hole on the rotating ring, and the mounting slide block being bolted to the preset hole.

[0011] Preferably, the guiding assembly includes a mounting plate symmetrically fixedly mounted on the clamping claw, a rotating arm rotatably connected to the mounting plate, a guide wheel rotatably connected to the rotating arm, and a tension spring fixedly connected between the two rotating arms.

[0012] Preferably, the drive assembly includes a drive motor fixedly mounted on a movable base, a drive wheel fixedly connected to the output end of the drive motor, a mating ring provided on the outer slide rail, and the drive wheel engaging with the mating ring in a transmission manner.

[0013] Preferably, the welding assembly includes a slide rod slidably mounted on a lifting lug, an end block fixedly connected to the upper end of the slide rod, a protective cover fixedly connected to the lower end of the slide rod, a spring sleeved on the slide rod, an inner arm fixedly connected to the inner top wall of the protective cover, a following wheel rotatably connected to the lower part of the inner arm, a following frame fixedly mounted at the center of the protective cover, a welding torch slidably mounted inside the following frame, the welding end of the welding torch extending into the protective cover, and a camera mounted on the protective cover; a lever rotatably connected inside the following frame, a dial ring, a lower limit ring, and an upper limit ring fixedly connected sequentially from bottom to top on the outer side of the welding torch, the end of the lever near the welding torch contacting the dial ring, and the lower limit ring and the upper limit ring located on the lower and upper sides of the following frame, respectively.

[0014] This invention provides a plasma arc welding machine for steel structures. It has the following beneficial effects: 1. The present invention, through the setting of lifting components and welding components, can automatically follow the shape of steel structure products to perform welding operations, without the need for frequent control of the welding gun position, thereby improving welding quality and efficiency.

[0015] 2. The present invention provides buffering and clamping functions for steel structure products through the clamping and guiding components, which facilitates the loading and unloading of steel structure products and makes processing convenient.

[0016] 3. The present invention provides support and guidance for steel structure products through the set support components, which facilitates the movement of steel structures. Attached Figure Description

[0017] Figure 1 This is an overall perspective view of the present invention; Figure 2 This is a side view of the entire invention; Figure 3 This is a perspective view of the supporting component in this invention; Figure 4 This is a perspective view of the lifting component in this invention; Figure 5 This is a perspective view of the clamping component in this invention; Figure 6 This is a perspective view of the guiding component in this invention; Figure 7 This is a perspective view of the moving component in this invention; Figure 8 This is a perspective view of the welding assembly in this invention; Figure 9 This is a cross-sectional perspective view of the welding assembly in this invention; Figure 10 This is a three-dimensional view of the driving state of the driving component in this invention.

[0018] The components include: 1. Base plate; 2. Support assembly; 3. Steel structure product; 4. Lifting assembly; 5. Clamping assembly; 6. Guide assembly; 7. Drive assembly; 8. Moving assembly; 9. Welding assembly; 201. Support column; 202. Support roller; 401. Mounting frame; 402. Lifting push rod; 403. Lifting frame; 404. Lifting lug; 501. Rotating ring; 502. Preset hole; 503. Mounting slide; 504. Clamping push rod; 505. Clamping claw; 506. Inner slide rail; 507. Outer slide rail; 5071. Mating ring; 601. Installation... 602. Mounting plate; 603. Rotating arm; 604. Guide wheel; 705. Tension spring; 701. Drive motor; 702. Drive wheel; 801. Moving track; 802. Moving seat; 803. Hydraulic cylinder; 804. Connecting plate; 805. Ring groove; 901. Protective cover; 902. Slide rod; 903. Spring; 904. End block; 905. Welding torch; 906. Camera; 907. Follower frame; 908. Internal arm; 909. Follower wheel; 1001. Lever; 1002. Lever ring; 1003. Upper limit ring; 1004. Lower limit ring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-10 As shown, an embodiment of the present invention provides a plasma arc welding machine for steel structures, including a base plate 1, and further comprising: refer to Figure 1 , Figure 2 Support component 2 is located at both ends of the inlet and outlet of the base plate 1 and is used to support the steel structure product 3. Support component 2 includes support column 201, and support roller 202 is rotatably connected to the upper part of support column 201. During support and guidance operations, the steel structure product 3 can be placed on the support roller 202. The length of the support roller 202 is greater than the width of the steel structure product 3, and the steel structure product 3 can move on the support roller 202 for easy placement. For a single batch of steel structure products 3, the height of the support column 201 is fixed to ensure that the steel structure product 3 is centered on the clamping assembly 5. If the steel structure product 3 has multiple sizes, the support column 201 can be set to an adjustable height to meet the adjustment requirements.

[0021] refer to Figure 1 , Figure 2 , Figure 4Lifting component 4 is located in the middle of the base plate 1 and is used to provide lifting function. Lifting component 4 includes mounting frame 401, which is fixedly mounted on the base plate 1. Lifting push rod 402 is fixedly mounted on the mounting frame 401. The output end of the lifting push rod 402 is fixedly connected to the lifting frame 403. The lower part of the lifting frame 403 is fixedly connected to the lifting ear 404. During lifting operations, the lifting push rod 402 operates under the control of an external power supply and controller, driving the lifting frame 403 and lifting lug 404 to rise or fall, thereby controlling the height of the welding position to meet the needs of steel structure products 3 of different sizes; the lifting push rod 402 can be selected as a servo push rod to achieve precise control and ensure stable position.

[0022] refer to Figure 1 , Figure 7 The moving component 8 is mounted on the base plate 1 and is used to provide a moving function. The moving component 8 includes a moving rail 801 and a hydraulic cylinder 803 fixedly mounted on the base plate 1. A moving seat 802 is slidably connected to the moving rail 801. A connecting plate 804 is fixedly connected to the output end of the hydraulic cylinder 803. The connecting plate 804 is fixedly connected to the moving seat 802. An annular groove 805 is provided on the moving seat 802. During mobile operation, the hydraulic cylinder 803 works under the action of the external hydraulic source and controller, driving the connecting plate 804 and the moving seat 802 to slide on the moving track 801, realizing the function of docking the end faces of the two steel structure products 3; the hydraulic cylinder 803 can also be replaced with other telescopic components.

[0023] refer to Figure 1 , Figure 5 The clamping component 5 is mounted on the moving component 8 and is used to clamp the steel structure product 3. The clamping component 5 includes a rotating ring 501. The outer ring of the rotating ring 501 is fixedly connected to an outer slide rail 507, which is slidably engaged with the ring groove 805. The inner ring of the rotating ring 501 is fixedly connected to an inner slide rail 506. A mounting slide 503 is slidably connected to the inner slide rail 506. A clamping push rod 504 is mounted on the mounting slide 503. A clamping claw 505 is fixedly connected to the output end of the clamping push rod 504. A preset hole 502 is provided on the rotating ring 501. The mounting slide 503 is mounted on the preset hole 502 by bolts. During clamping operations, the appropriate mounting slide 503 position is selected according to the shape of the steel structure product 3. For example, if the steel structure product 3 is a square tube, the mounting slide 503 can slide on the inner slide rail 506, and installation is carried out in a symmetrical manner. The clamping push rod 504 works under the control of the external power supply and controller, driving the clamping claw 505 to approach the steel structure product 3. The two symmetrical clamping claws 505 are used to achieve stable clamping of the steel structure product 3. There are multiple preset holes 502, and the appropriate installation position can be selected according to the requirements.

[0024] refer to Figure 1 , Figure 5 , Figure 6 The guide component 6 is disposed on the clamping part of the clamping component 5 and is used to guide and buffer the steel structure product 3. The guide component 6 includes a mounting plate 601 symmetrically fixedly mounted on the clamping claw 505, a rotating arm 602 rotatably connected to the mounting plate 601, a guide wheel 603 rotatably connected to the rotating arm 602, and a tension spring 604 fixedly connected between the two rotating arms 602. During the guiding operation, when the steel structure product 3 is not placed on the clamping claw 505, due to the elastic force of the tension spring 604, the rotating arm 602 rotates to fit against the clamping claw 505, and the guide wheel 603 is higher than the plane where the clamping claw 505 is located. Therefore, when the steel structure product 3 is placed from top to bottom, the steel structure product 3 presses on the guide wheel 603. When the weight of the steel structure product 3 is greater than the elastic force of the tension spring 604, the rotating arm 602 will open, and the guide wheel 603 will be flush with the clamping surface of the clamping claw 505. Therefore, it will not affect the normal clamping function of the clamping claw 505. When only one end of the steel structure product 3 is on the guide wheel 603, the weight of the steel structure product 3 is less than the elastic force of the tension spring 604. Therefore, the steel structure product 3 can be stably placed from both sides to the middle under the action of the guide wheel 603, achieving the effect of stable material feeding, reducing the friction between the steel structure product 3 and the clamping claw 505, ensuring the good appearance of the steel structure product 3, and improving product quality.

[0025] refer to Figure 1 , Figure 10 The drive assembly 7 is located on the moving assembly 8 and is used to drive the clamping assembly 5 to rotate. The drive assembly 7 includes a drive motor 701 fixedly installed on the moving base 802. The output end of the drive motor 701 is fixedly connected to the drive wheel 702. The outer slide rail 507 is provided with a mating ring 5071. The drive wheel 702 and the mating ring 5071 are in a transmission engagement. During operation, the drive motor 701 operates under the control of the external power supply and controller, driving the drive wheel 702 to rotate. The drive wheel 702 drives the mating ring 5071 to rotate in the opposite direction, and the mating ring 5071 drives the rotating ring 501 to rotate, thereby controlling the rotation of the steel structure product 3 and realizing the function of circumferential welding of the steel structure product 3. The drive wheel 702 and the mating ring 5071 can be driven by friction contact or by gear and rack, as long as the drive wheel 702 and the mating ring 5071 do not slip relative to each other.

[0026] refer to Figure 1 , Figure 2 , Figure 8 , Figure 9Welding assembly 9, located on the lifting component of lifting assembly 4, provides the function of automatically following the shape of steel structure product 3 during welding. Welding assembly 9 includes a slide rod 902 slidably mounted on lifting lug 404. An end block 904 is fixedly connected to the upper end of slide rod 902, and a protective cover 901 is fixedly connected to the lower end of slide rod 902. A spring 903 is sleeved on slide rod 902. An internal arm 908 is fixedly connected to the inner top wall of protective cover 901, and a following wheel 909 is rotatably connected to the lower part of internal arm 908. A fixedly mounted... The device includes a follower frame 907, inside which a welding torch 905 is slidably mounted. The welding end of the welding torch 905 extends into a protective cover 901, on which a camera 906 is mounted. A lever 1001 is rotatably connected inside the follower frame 907. From bottom to top, a lever ring 1002, a lower limit ring 1004, and an upper limit ring 1003 are fixedly connected to the outer side of the welding torch 905. The end of the lever 1001 closest to the welding torch 905 contacts the lever ring 1002. The lower limit ring 1004 and the upper limit ring 1003 are located on the lower and upper sides of the follower frame 907, respectively. During welding, driven by the lifting assembly 4, the following wheel 909 and the welding torch 905 will contact the surface of the steel structure product 3 and the welding part, respectively. The welding torch 905 adopts the plasma arc welding technology of the prior art, and uses a high-temperature compressed electric arc as a heat source to achieve precision welding. While welding, the steel structure product 3 slowly rotates, and the following wheel 909 will roll on the surface of the steel structure product 3, such as a square tube. When the shape of the steel structure product 3 changes, the following wheel 909 will be supported by the upward force of the steel structure product 3, which will compress the spring 903. The spring 903 will undergo compression deformation, and the internal arm 908 will drive the protective cover 901. The protective cover 901 will drive the following frame 907. The following frame 907 will drive the welding torch 905 to move upward. Similarly, the welding torch 905 can also move downward to fit the shape of the steel structure product 3. Therefore, the welding torch 905 can always move parallel to the shape of the steel structure product 3, realizing the function of automatically following the shape of the steel structure product 3 for synchronous welding. To improve welding quality, when the follower wheel 909 rolls to the corner of the square tube, the displacement difference between the follower wheel 909 and the spring 903 is at its maximum. At this time, the lever 1001 is driven upward by the follower frame 907. The outer end of the lever 1001 strikes the lower surface of the lifting frame 403, and the other end of the lever 1001 tilts up to contact the dial ring 1002. The dial ring 1002 drives the welding torch 905 to slide upward a small distance, for example, 1 mm, within the follower frame 907. The lower limit ring 1004 contacts the inner top surface of the follower frame 907, limiting the movement of the welding torch 905 to its limit. Therefore, it can prevent the welding torch 905 from moving too far upward. At this time, the distance between the welding end of the welding torch 905 and the corner of the square tube increases, forming a large space for heat release, avoiding heat concentration at the corner of the square tube, which would lead to a decrease in welding quality. This achieves corner fine-tuning welding and improves welding quality. After the corner, under the action of gravity, the welding torch 905 returns to its original position and continues the welding operation. While welding, the camera 906 can simultaneously capture images of the weld seam and monitor its quality in real time. The protective cover 901 can also block welding light and welding slag, ensuring a good welding environment. If a lot of welding fumes are generated, an extraction pipe can be added to the protective cover 901, and external extraction equipment can be used to remove them. Installation can be selected according to the actual situation. Steel structure product 3 can be commonly used steel products, such as square tubes, H-beams, steel columns, steel beams, and steel plates.

[0027] Working principle: The steel structure product 3 is hoisted and one end is placed on the support roller 202. It is moved from both sides to the middle. The clamping claw 505 is initially positioned at the top and bottom. Then, under the action of the guide wheel 603, the steel structure product 3 can be stably put into the middle from both sides, meeting the conditions for clamping. Then the clamping push rod 504 works, driving the clamping claw 505 to approach the steel structure product 3, and using the two symmetrical clamping claws 505 to achieve stable clamping of the steel structure product 3; Then the hydraulic cylinder 803 works, driving the connecting plate 804 and the moving seat 802 to slide on the moving track 801, so that the end faces of the two steel structure products 3 are joined together to form the gap required for welding. When the lifting push rod 402 is working, it drives the lifting frame 403 and lifting lug 404 to descend. The following wheel 909 and welding gun 905 will contact the surface and welding part of the steel structure product 3 respectively. At the same time, the drive motor 701 is working, which drives the drive wheel 702 to rotate. The drive wheel 702 drives the mating ring 5071 to rotate in the opposite direction. The mating ring 5071 drives the rotating ring 501 to rotate, thereby controlling the rotation of the steel structure product 3. The follower wheel 909 rolls on the surface of the steel structure product 3. When the shape of the steel structure product 3 changes, the follower wheel 909 will be supported by the upward force of the steel structure product 3, compressing the spring 903. The spring 903 will undergo compression deformation, and the internal arm 908 will drive the protective cover 901. The protective cover 901 will drive the follower frame 907, and the follower frame 907 will drive the welding torch 905 to move upward. Similarly, the welding torch 905 can also move downward, which can adapt to the shape of the steel structure product 3. Therefore, the welding torch 905 can always move parallel to the shape of the steel structure product 3, realizing the function of automatically following the shape of the steel structure product 3 for synchronous welding. After welding is completed, each part can be reset. To ensure the stability of the welding process, a brake is added to the drive motor 701 to achieve stable control of the rotation of the self-rotating ring 501.

[0028] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plasma arc welding machine for steel structures, comprising a base plate (1), characterized in that, Also includes: Support component (2), which is located at both ends of the bottom plate (1) for supporting steel structure products (3); Lifting assembly (4), which is located in the middle of the base plate (1) and is used to provide lifting function; A movable component (8) is disposed on a base plate (1) and is used to provide a movable function; Clamping assembly (5), which is disposed on the moving assembly (8) and is used to clamp the steel structure product (3); The guide component (6) is disposed on the clamping part of the clamping component (5) and is used to guide and buffer the steel structure product (3). A drive component (7) is mounted on a moving component (8) and is used to drive the clamping component (5) to rotate. Welding assembly (9), which is located on the lifting component of the lifting assembly (4), is used to provide the function of automatically following the shape of the steel structure product (3) for welding; The lifting assembly (4) includes a mounting frame (401), which is fixedly mounted on the base plate (1). A lifting push rod (402) is fixedly mounted on the mounting frame (401). A lifting frame (403) is fixedly connected to the output end of the lifting push rod (402). A lifting ear (404) is fixedly connected to the lower part of the lifting frame (403). The welding assembly (9) includes a slide rod (902) slidably mounted on a lifting lug (404). An end block (904) is fixedly connected to the upper end of the slide rod (902), and a protective cover (901) is fixedly connected to the lower end of the slide rod (902). A spring (903) is sleeved on the slide rod (902). An inner arm (908) is fixedly connected to the inner top wall of the protective cover (901). A following wheel (909) is rotatably connected to the lower part of the inner arm (908). A following frame (907) is fixedly mounted at the center of the protective cover (901), and a welding torch (900) is slidably mounted inside the following frame (907). 05), the welding end of the welding torch (905) extends into the protective cover (901), and a camera (906) is installed on the protective cover (901); a lever (1001) is rotatably connected inside the follower frame (907), and a dial ring (1002), a lower limit ring (1004), and an upper limit ring (1003) are fixedly connected to the outside of the welding torch (905) from bottom to top. The end of the lever (1001) near the welding torch (905) is in contact with the dial ring (1002), and the lower limit ring (1004) and the upper limit ring (1003) are located on the lower side and the upper side of the follower frame (907), respectively.

2. The plasma arc welding machine for steel structures according to claim 1, characterized in that: The support assembly (2) includes a support column (201), and a support roller (202) is rotatably connected to the upper part of the support column (201).

3. The plasma arc welding machine for steel structures according to claim 1, characterized in that: The moving component (8) includes a moving track (801) and a hydraulic cylinder (803) fixedly installed on the base plate (1). A moving seat (802) is slidably connected on the moving track (801). A connecting plate (804) is fixedly connected to the output end of the hydraulic cylinder (803). The connecting plate (804) is fixedly connected to the moving seat (802). An annular groove (805) is provided on the moving seat (802).

4. A plasma arc welding machine for steel structures according to claim 3, characterized in that: The clamping assembly (5) includes a rotating ring (501), the outer ring of which is fixedly connected to an outer slide rail (507), the outer slide rail (507) slidingly engaging with an annular groove (805), the inner ring of which is fixedly connected to an inner slide rail (506), the inner slide rail (506) being slidably connected to a mounting slide (503), the mounting slide (503) being mounted with a clamping push rod (504), the output end of the clamping push rod (504) being fixedly connected to a clamping claw (505), the rotating ring (501) having a preset hole (502), and the mounting slide (503) being bolted to the preset hole (502).

5. A plasma arc welding machine for steel structures according to claim 4, characterized in that: The guide assembly (6) includes a mounting plate (601) symmetrically fixedly mounted on the clamping claw (505), a rotating arm (602) rotatably connected to the mounting plate (601), a guide wheel (603) rotatably connected to the rotating arm (602), and a tension spring (604) fixedly connected between the two rotating arms (602).

6. A plasma arc welding machine for steel structures according to claim 4, characterized in that: The drive assembly (7) includes a drive motor (701) fixedly mounted on a movable base (802). The output end of the drive motor (701) is fixedly connected to a drive wheel (702). A mating ring (5071) is provided on the outer slide rail (507). The drive wheel (702) and the mating ring (5071) are in a transmission engagement.

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