Metal door frame welding device

Abstract

The invention relates to the technical field of door frame welding, and discloses a metal door frame welding device which comprises a base, clamping plates for placing door frame strips are arranged on the circumferential edges of the top of the base respectively, a limiting driving assembly is arranged on the base, and the clamping plates are driven by the limiting driving assembly to move in the direction perpendicular to the length direction of the clamping plates. Guide rails are arranged at the two ends of the clamping plate respectively, the adjacent guide rails intersect perpendicularly, a sliding block is arranged at the intersection in a sliding mode, and a circumferential welding device and a positioning plate for positioning the ends of the door frame strips are arranged on the sliding block. Compared with the prior art, the device has the advantages that when the device is not used, contraction is convenient, the occupied space is reduced, door frame strips can be automatically aligned and spliced conveniently, circumferential welding is achieved conveniently, overturning is avoided, and the machining efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of door frame welding, in particular to a metal door frame welding device. Background Art

[0002] When processing metal door frames, the profiles need to be cut to form door frame strips first, and then the cut door frame strips are spliced into a whole at 45° or right angles, fixed with a clamp to ensure alignment accuracy, and then the door frame strip joints are welded through welding components to form a door frame.

[0003] However, the existing door frame platform needs to occupy a large space when splicing, and the two adjacent door frame strips to be welded cannot automatically align to form a door frame during splicing and assembly. If the alignment is not accurate, it will affect the subsequent welding processing accuracy; in addition, when welding the door frame at a 45° connection angle, in order to ensure the integrity of the welding and achieve a higher connection strength, it is often necessary to weld one side and then flip it over to weld the other side, which increases the process and reduces the welding efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the splicing platform occupies a large space, the door frame strips cannot be automatically aligned, and after single-sided welding, the door frame needs to be turned over and the other side needs to be welded, which reduces welding efficiency.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a metal door frame welding device, comprising a base, a limit drive assembly that can drive the door frame strip to move is respectively provided on the circumference of the top of the base, and a clamping plate is provided at the end of the limit drive assembly, and guide rails are respectively provided at both ends of the clamping plate, and adjacent guide rails intersect vertically and have a slider that slides together at the intersection, and a circumferential welder and a positioning plate for centering the door frame strip on the clamping plate are provided on the slider; the circumferential welder includes a shell with a C-shaped notch and a C-shaped plate, a retractable welding head is provided on the inner side of the C-shaped plate, the shell is inclined at 45° and is arranged between the two guide rails, and a welding drive assembly that drives the C-shaped plate to slide along the C-shaped notch and an automatic wire feeding assembly that can automatically feed wire to the welding head is provided in the shell.

[0006] Furthermore, the welding drive assembly includes a driven gear in a rotationally connected housing and an external rack provided on the outer periphery of the C-shaped plate, wherein the driven gear is driven by power and meshes with the external rack.

[0007] Furthermore, the automatic wire feeding assembly includes an inner rack arranged at the C-shaped notch and having a C-shaped structure. A driving gear is rotatably provided on the C-shaped plate. The driving gear is engaged with the inner rack and is coaxially provided with a welding wire roller that can feed wire for the welding head. The welding wire on the welding wire roller passes through the C-shaped plate and automatically feeds wire to the welding head at the other end.

[0008] Furthermore, the C-shaped plate is also provided with a compensation wire feeding assembly for performing compensation wire feeding when the driving gear moves to the notch. The compensation wire feeding assembly includes a compensation gear that is rotatably arranged on the C-shaped plate and meshes with the inner rack. A compensation roller is coaxially provided on the compensation gear, and a drive roller is coaxially provided on the driving gear. The drive roller is connected to the compensation roller through a synchronous belt.

[0009] Furthermore, the limit drive assembly includes a parallel rod arranged between the clamping plate and the base and parallel to the clamping plate, the base is provided with a driving member that can drive the parallel rod to move, through holes are provided on both sides of the parallel rod, and first hinge rods are hinged on both sides of the clamping plate, and a hinge shaft is provided at the other end of the first hinge rod, the hinge shaft passes through the through hole and is hinged to the second hinge rod at the other end, and the other end of the second hinge rod is hinged to the base.

[0010] Furthermore, a notch is provided on one side of the clamping plate and a slide plate arranged parallel to the clamping plate is slidably provided at the notch. The slide plate and the notch are attracted by an electromagnet to clamp the door frame strip. A plurality of rollers are provided on the slide plate and the notch.

[0011] Furthermore, the shell is provided with a making way component that can drive the positioning plate to make way to facilitate welding of the welding head. The making way component includes a telescopic cylinder. The power end of the telescopic cylinder is provided with a double-sided rack. The shell is hinged with incomplete gears on both sides of the double-sided rack. The other end of the incomplete gear is provided with an adjusting rod. The adjusting rod is slidably provided with a driving column, and the other end of the driving column is fixedly connected to the positioning plate.

[0012] Furthermore, the housing is provided with a control switch electrically connected to the drive motor and the welding head, and the free end of the double-sided rack is provided with a shift rod arranged relative to the control switch.

[0013] Furthermore, the inner side of the C-shaped plate is also provided with a knocking assembly for knocking and removing welding slag, the knocking assembly includes a fixed cylinder connected to the inner side of the C-shaped plate, a lifting rod is provided for sliding in the fixed cylinder, a spring is provided between the lifting rod and the fixed cylinder, a U-shaped plate is provided at the bottom end of the lifting rod, and driving wheels are provided for rotation at the free ends of the U-shaped plate, a connecting rod is provided between the relative driving wheels, a V-shaped rod is hinged on the inner side of the U-shaped rod through a torsion spring, a knocking head is provided at one end of the V-shaped rod for abutting the door frame strip, and the other end is driven by the connecting rod and drives the knocking head to knock back and forth.

[0014] The advantages of the present invention compared with the prior art are: 1. The present invention can drive the opposite side clamping plates to move synchronously by setting a limit drive assembly. The guide rail drives the positioning plate to move by driving the slider, and then drives the door frame strips to automatically form a door frame, which is convenient for improving positioning efficiency. 2. The present invention provides a space-making assembly, which facilitates driving the positioning plate to move out of position after the door frame strips are formed into a door frame, thereby preventing the positioning plate from blocking the welded area and affecting the welding operation of the welding head; 3. The present invention facilitates loading and unloading of door frames by providing a C-shaped notch housing in the circumferential welder. The automatic wire feeding assembly facilitates automatic wire feeding for the welding head. The C-shaped plate is driven by the welding drive assembly to drive the retractable welding head to slide annularly along the C-shaped notch, so that the welding head can perform circumferential welding on the connection of the door frame strips. 4. The present invention facilitates the knocking and removing of welding slag by setting a knocking component, thereby simplifying the slag removal process and improving the door frame processing efficiency; 5. The present invention provides a clamping plate, a guide rail and a slider. When the device is idle, the clamping plate can be driven by a limit drive assembly to retract the guide rail so that the clamping plate is close to the base, forming a "well"-shaped structure and reducing space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a metal door frame welding device of the present invention.

[0016] Figure 2 It is a schematic diagram of a half-section structure of a metal door frame welding device of the present invention.

[0017] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of A in the figure.

[0018] Figure 4 It is a structural schematic diagram of a limit drive component in a metal door frame welding device of the present invention.

[0019] Figure 5 yes Figure 2 Schematic diagram of the enlarged structure of B.

[0020] Figure 6 yes Figure 5 Schematic diagram of the local structure.

[0021] Figure 7 yes Figure 5 Schematic diagram of the main cross-section structure.

[0022] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure of C in the figure.

[0023] Figure 9 yes Figure 5 Schematic diagram of the cross-sectional structure.

[0024] Figure 10 It is a structural schematic diagram of an automatic wire feeding assembly in a metal door frame welding device of the present invention.

[0025] Figure 11 The diagram is a partial cross-sectional structural diagram of a circumferential welder in a metal door frame welding device of the present invention.

[0026] As shown in the figure: 1. Limit drive assembly, 2. Circumferential welder, 3. Knocking assembly, 4. Give way assembly, 5. Automatic wire feeding assembly, 6. Compensating wire feeding assembly, 7. Welding drive assembly, 8. Clamping plate, 9. Guide rail, 10. Slider, 11. Positioning plate, 12. Base, 13. Notch, 14. Slide plate, 15. Purge pipe, 16. Nozzle, 100. Parallel rod, 101. Drive member, 1010. First motor, 1011. First bevel gear, 1012. Second bevel gear, 1013. Drive rod, 1014. Threaded barrel, 102. Through hole, 103. First hinge rod, 104. Second hinge rod, 200. Housing, 201. C-shaped notch, 202. C-shaped plate, 203. Welding head, 300. Fixed cylinder, 301. Lifting rod, 302. U-shaped plate, 303. Spring, 304. Driving wheel, 305. V-shaped rod, 306. Striking head, 400. Telescopic cylinder, 401. Control switch, 402. Double-sided rack, 403. Push rod, 404. Incomplete gear, 405. Adjusting rod, 406. Driving column, 500. Internal rack, 501. Driving gear, 502. Wire roller, 600. Compensating gear, 601. Synchronous belt, 700. Driving motor, 701. Driving gear, 702. Driven gear, 703. External rack. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] Combined with attachment Figure 1 and attached Figure 2 A metal door frame welding device includes a base 12. A limit drive component 1 is provided on the top circumference of the base 12 to drive the door frame strip to move. A clamping plate 8 is provided at the end of the limit drive component 1. After being driven by the limit drive component 1, the clamping plate 8 drives the door frame strip to move in a direction perpendicular to its length, so that the door frame strip automatically forms a door frame and is limited. Guide rails 9 are provided at both ends of the clamping plate 8. Adjacent guide rails 9 intersect vertically and a slider 10 slides together at the intersection. The slider 10 is provided with a circumferential welder 2 and a positioning plate 11 for positioning the end of the door frame strip.

[0029] In the present invention, the sliders 10 are arranged at the four corners of the door frame composed of four door frame strips. Initially, the positioning plates 11 remain flush with the side walls of the notches 13 on the same side, and one end of the positioning plates 11 abuts against each other. Since pressure sensors are respectively provided on the positioning plates 11, the two ends of the door frame strips are positioned by the relatively arranged positioning plates 11. When the relatively arranged positioning plates 11 are subjected to the same pressure when positioning the door frame strips, the door frame strips are centered and the drive stops. The same is true for the other side until the door frame strips are driven by the positioning plates 11 to form a door frame.

[0030] Combined with attachment Figure 2 and attached Figure 3 A notch 13 is provided on one side of the clamping plate 8 and a slide 14 parallel to the clamping plate 8 is slidably provided at the notch 13. The slide 14 and the notch 13 are attracted by an electromagnet to clamp the door frame strip. A number of rollers are provided on the slide 14 and the notch 13 relative to each other.

[0031] In the natural state, the slide is driven by the elastic part to stop at the end of the notch. At this time, the slide and the notch are not in contact, which is convenient for the placement of the door frame strip. The door frame strip is placed between the notch 13 and the slide 14. After power is turned on, due to the attraction of the electromagnet, the slide 14 drives the door frame strip to slide closer to the side wall of the notch 13, thereby limiting the door frame strip. The setting of the roller makes it convenient for the door frame strip to maintain movement along the length direction of the notch 13 after the door frame strip is limited.

[0032] Combined with attachment Figure 2 and attached Figure 4 The limit drive assembly 1 includes a parallel rod 100 provided between the clamping plate 8 and the base 12 and parallel to the clamping plate 8. The base 12 is provided with a driving member 101 that can drive the parallel rod 100 to move. The driving member 101 includes a driving cavity connected to the base 12, a first motor 1010 is provided in the driving cavity, and a first bevel gear 1011 is provided at the power end of the first motor 1010. The driving cavity is provided with a second bevel gear 101 on both sides of the first bevel gear 1011, which is meshed with the first bevel gear 1011. 2. A driving rod 1013 is provided in the second bevel gear 1012, and a threaded cylinder 1014 is provided on the parallel rod 100. The other end of the driving rod 1013 rotates through the base 12 and is threadedly engaged with the threaded cylinder 1014 at the end. Through holes 102 are provided on both sides of the parallel rod 100. First hinges 103 are hinged on both sides of the clamping plate 8. A hinge shaft is provided at the other end of the first hinge 103. The hinge shaft passes through the through hole 102 and is hinged to the second hinge 104 at the other end. The other end of the second hinge 104 is hinged to the base 12.

[0033] The above-mentioned driving member 101 has two sets, and each set of driving members 101 independently controls the parallel rods 100 on the opposite side to adapt to door frames of different sizes. When the first motor 1010 is started, the first motor 1010 drives the first bevel gear 1011. The first bevel gear 1011 rotates the driving rod 1013 by meshing with the second bevel gear 1012. The driving rod 1013 drives the parallel rod 100 by threaded engagement with the threaded barrel 1014. Due to the coordinated arrangement of the first hinge 103, the hinge shaft, the through hole 102 and the second hinge 104, the parallel rod 100 can only translate along the mid-perpendicular direction of the clamping plate 8. The parallel rod 100 drives the clamping plate 8 to translate through the first hinge 103 and the second hinge 104. The clamping plate 8 drives the guide rail 9. The guide rail 9 drives the relative positioning plate 11 to continuously adjust the spacing by sliding with the slider 10 until it abuts and cooperates with the door frame strip. At this time, the door frame strips cooperate with each other to form a door frame.

[0034] In order to avoid the positioning plate 11 from blocking the welding position, it is convenient to make room for the welding head 203 so that the welding head 203 and the door frame strip connection can be abutted for welding. Figure 5 and attached Figure 6 The shell 200 is provided with a giving way component 4 that can drive the positioning plate 11 to give way to facilitate the welding of the welding head 203. The giving way component 4 includes a telescopic cylinder 400 arranged between the shell 200 and the slider 10. The power end of the telescopic cylinder 400 is provided with a double-sided rack 402. The shell 200 is hinged with an incomplete gear 404 on both sides of the double-sided rack 402. The other end of the incomplete gear 404 is provided with an adjusting rod 405. The adjusting rod 405 is slidably provided with a driving column 406. The other end of the driving column 406 is fixedly connected to the positioning plate 11. The positioning plate 11 is driven by the sliding cooperation of the adjusting rod 405 and the driving column 406 to slide from the side parallel to the side wall of the notch 13 to the side away from the notch 13, so that the welding head 203 abuts against the connection between the door frame strip.

[0035] Status 1: The two positioning plates 11 on the same slider are symmetrically arranged with the main cross-section of the circumferential welder 2 as the symmetry axis, and one end of the positioning plates 11 abuts against each other. Since the door frame strip is placed on the slide 14 and the notch 13 is not aligned, when the driving member 101 drives the clamping plate 8 to drive the door frame strip to move, the clamping plate 8 simultaneously drives the slider 10 inward through the guide rail 9, and the outer edge of the cut surface at one end of the door frame strip abuts against the positioning plate 11, and the first motor 1010 continues to drive until the positioning plates 11 on the opposite sides of the door frame strip abut against the outer edges of the cut surfaces at both ends of the door frame strip. Since pressure sensors are respectively provided on the positioning plates 11, when the relatively arranged positioning plates 11 are subjected to the same pressure when positioning the door frame strip, the door frame strip is centered at this time, and the first motor 1010 controlling the door frame strip in this direction stops driving. The same is true for the other side until the door frame strip is driven by the positioning plate 11 to form a door frame.

[0036] State 2: By driving the telescopic cylinder 400, the double-sided rack 402 is driven to retract, and the double-sided rack 402 drives the adjustment rod 405 by engaging with the incomplete gear 404. The adjustment rod 405 drives the positioning plate 11 to slide, so that the positioning plate 11 moves away from the four corners of the door frame bar, thereby making way for the welding head 203 to avoid affecting the welding.

[0037] Combined with attachment Figure 2 , Attachment Figure 5 and attached Figure 9 The circumferential welder 2 includes a shell 200 with a C-shaped notch 201 and a C-shaped plate 202. A retractable welding head 203 is provided on the inner side of the C-shaped plate 202. The shell 200 is inclined at 45° and is arranged between two guide rails 9. The shell 200 is provided with a welding drive component 7 that drives the C-shaped plate 202 to slide annularly along the C-shaped notch 201, and an automatic wire feeding component 5 that can automatically feed wire to the welding head 203.

[0038] The arrangement of the C-shaped notch 201 in the above structure facilitates the feeding of the door frame strips, and the material can be removed smoothly after the door frame is welded.

[0039] Combined with attachment Figure 5 , Attachment Figure 6 and attached Figure 9 The welding drive assembly 7 includes a drive motor 700 connected to the housing 200, and a driving gear 701 is provided at the power output end of the drive motor 700. The housing 200 is provided with driven gears 702 on both sides of the driving gear 701, and an outer rack 703 is provided on the outer periphery of the C-shaped plate 202. The driven gear 702 is respectively engaged with the outer rack 703 and the driving gear 701. A control switch 401 is provided on the housing 200, and the control switch 401 is electrically connected to the drive motor 700 and the welding head 203. The free end of the double-sided rack 402 is provided with a lever 403 arranged relative to the control switch 401.

[0040] When the telescopic cylinder 400 drives the lever 403 to press the control switch 401 downward, the circuit of the drive motor 700 is connected, the drive motor 700 drives the driving gear 701, the driving gear 701 drives the driven gear 702, and the driven gear 702 drives the C-shaped plate 202 by engaging with the outer rack 703, driving the welding head 203 to slide in an annular manner, so as to achieve welding of the connection between the door frame strips.

[0041] The welding head is the core tool of the welding operation. It has a built-in power supply to provide current to the welding head, and a conductive tip at its free end, which directly contacts the welding wire or tungsten electrode to conduct the current to the workpiece. When the power is turned on, an arc forms between the welding gun electrode, the welding wire / tungsten electrode, and the workpiece. The temperature can reach 3000-6000°C, melting the metal to form a molten pool, which facilitates the melting of the welding wire. Automatic wire feeding ensures continuous welding. As the molten pool cools, a dense weld is formed, accompanied by slag on the surface.

[0042] Combined with attachment Figure 9 and attached Figure 10 The automatic wire feeding assembly 5 includes an inner rack 500 with a C-shaped structure and is arranged at the C-shaped notch 201. A driving gear 501 is rotatably provided on the C-shaped plate 202. The driving gear 501 is engaged with the inner rack 500 and is coaxially provided with a welding wire roller 502 that can feed wire for the welding head 203. The welding wire on the welding wire roller 502 passes through the C-shaped plate 202 and is automatically fed to the welding head 203 at the other end.

[0043] At the same time, the driving gear 501 rotates by meshing with the inner rack 500, and the driving gear 501 drives the welding wire roller 502 to rotate to perform the wire feeding operation.

[0044] When the C-shaped plate 202 slides along the C-shaped notch 201 to the disconnection point of the C-shaped notch 201, the driving gear 501 loses power at this time due to the discontinuity of the inner rack 500. In order to ensure that the welding head 203 can continuously feed the wire for welding at the C-shaped notch 201, the attached Figure 9 The C-shaped plate 202 is also provided with a compensation wire feeding assembly 6 for performing compensation wire feeding when the driving gear 501 moves to the notch. The compensation wire feeding assembly 6 includes an inner rack 500 provided at the C-shaped notch 201 and having a C-shaped structure, and a driving gear 501 rotatably provided on the C-shaped plate 202 and meshing with the inner rack 500. A welding wire roller 502 for conveying welding wire is coaxially provided on the driving gear 501, and the free end of the welding wire extends to the welding head 203.

[0045] When the driving gear 501 moves with the C-shaped plate 202 to the disconnected position of the C-shaped notch 201, the compensation gear 600 rotates by meshing with the inner rack 500, and the compensation gear 600 continuously drives the driving gear 501 through the synchronous belt 601 to perform compensation wire feeding; wherein, in combination with the attached Figure 11 The angle formed by the line connecting the centers of the compensation gear 600 and the C-shaped notch 201 and the line connecting the centers of the drive gear 501 and the C-shaped notch 201 is A, and the angle between the two ends of the C-shaped notch 201 and the center of the C-shaped notch 201 is B, then A>B, so that at least one of the compensation gear 600 and the drive gear 501 remains engaged with the inner rack 500, thereby realizing compensation wire feeding.

[0046] Combined with attachment Figure 7 and attached Figure 8 The inner side of the C-shaped plate 202 is also provided with a knocking component 3 for knocking and removing welding slag. The knocking component 3 includes a fixed cylinder 300 connected to the inner side of the C-shaped plate 202, and a lifting rod 301 is slidingly provided in the fixed cylinder 300. A spring 303 is provided between the lifting rod 301 and the fixed cylinder 300. A U-shaped plate 302 is provided at the bottom end of the lifting rod 301. The free ends of the U-shaped plate 302 are respectively provided with driving wheels 304 for rotation. A connecting rod is provided between the relative driving wheels 304. A V-shaped rod 305 is hinged on the inner side of the U-shaped rod through a torsion spring. A knocking head 306 is provided at one end of the V-shaped rod 305 to abut the door frame strip, and the other end is driven by the connecting rod and drives the knocking head 306 to knock back and forth.

[0047] In the above structure, the lifting rod 301 is driven by the spring 303 so that the driving wheel 304 is always in contact with the door frame. At the same time, the V-shaped rod 305 is always in contact with the door frame under the action of the torsion spring. As the C-shaped plate 202 slides in an annular manner along the C-shaped notch 201, the driving wheel 304 drives the connecting rod 305 to rotate, and the connecting rod drives the V-shaped rod 305 away from one end of the striking head 306, so that the V-shaped rod 305 drives the striking head 306 to rotate clockwise at a certain angle with the hinge of the U-shaped rod as the axis until the connecting rod loses contact with the V-shaped rod 305. Under the action of the torsion spring, the V-shaped rod 305 drives the striking head 306 to reset and strike the welded part, which is convenient for cleaning welding slag.

[0048] In order to prevent welding slag from falling into the hollow cavity of the shell 200, a purge pipe 15 is provided near the C-shaped notch 201 of the shell 200. The input end of the purge pipe 15 is connected to the air duct of the fan. There are several spray holes 16 evenly distributed in an array on the purge pipe 15 to perform a purge operation on the welding slag.

[0049] The specific usage is as follows: First, place the door frame strip between the notch 13 and the slide 14, and energize the slide 14 and the clamping plate 8 to engage the electromagnet, so that the door frame strip is arranged parallel to the clamping plate 8; Then, by starting the first motor 1010, the first motor 1010 drives the driving rod 1013 to rotate through the engagement of the first bevel gear 1011 and the second bevel gear 1012, and the driving rod 1013 drives the parallel rod 100 through the threaded cooperation with the threaded cylinder 1014. The parallel rod 100 drives the clamping plate 8 and the door frame strip to move horizontally through the hinge connection of the first hinge rod 103 and the second hinge rod 104. If the door frame strip is not placed in the center, one end will first abut against the positioning plate 11 on one side, and the first motor 1010 continues to drive until the positioning plate 11 on the opposite side is subjected to basically the same pressure. At this time, the two ends of the door frame strip abut against the positioning plate 11, and the drive is stopped. The same operation is performed on the other opposite side, so that the door frame strip is automatically assembled into a door frame. Next, the telescopic cylinder 400 is activated. The telescopic cylinder 400 drives the incomplete gear 404 to rotate about the hinge with the housing 200 through the engagement of the double-sided rack 402 and the incomplete gear 404. At the same time, the adjustment rod 405 is driven to slide the positioning plate 11, thereby providing space for the welding head 203 to weld. At the same time, when the positioning plate 11 moves to the other end of the slide slot, the lever 403 presses the control switch 401, driving the motor 700 and the welding head 203 to start working. Finally, the driving motor 700 drives the C-plate 202 through the engagement of the driven gear 702 with the driving gear 701 and the outer rack 703, driving the welding head 203 to perform circumferential welding operations on the door frame strip connection. At the same time, the driving wheel 304 drives the V-shaped rod 305 through the connecting rod, driving the knocking head 306 to knock the welding joint back and forth to facilitate the removal of welding slag. Then, the air flow is discharged from the nozzle 16 through the purge pipe 15 to purge the welding slag to prevent it from entering the shell 200 and affecting the work.

[0050] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0052] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A metal door frame welding device, comprising a base (12), wherein the top of the base (12) is provided with a limit drive assembly (1) which can drive the door frame strip to move, and the end of the limit drive assembly (1) is provided with a clamping plate (8), characterized in that: Guide rails (9) are respectively provided at both ends of the clamping plate (8), and adjacent guide rails (9) intersect vertically and have a slider (10) sliding together at the intersection. The slider (10) is provided with a circumferential welder (2) and a positioning plate (11) for centering the door frame strip on the clamping plate (8); the circumferential welder (2) comprises a shell (200) having a C-shaped notch (201) and a C-shaped plate (202), a retractable welding head (203) is provided on the inner side of the C-shaped plate (202), the shell (200 is inclined at 45 degrees and is arranged between the two guide rails (9), and a welding drive assembly (7) for driving the C-shaped plate (202) to slide annularly along the C-shaped notch (201) and an automatic wire feeding assembly (5) for automatically feeding wire to the welding head (203) are provided in the shell (200).

2. A metal door frame welding device according to claim 1, characterized in that: The welding drive assembly (7) comprises a driven gear (702) in a rotationally connected housing (200) and an outer rack (703) provided on the outer periphery of the C-shaped plate (202); the driven gear (702) is driven by power and meshes with the outer rack (703).

3. The metal door frame welding device according to claim 1, characterized in that: The automatic wire feeding assembly (5) comprises an inner rack (500) provided at the C-shaped notch (201) and having a C-shaped structure, and a driving gear (501) rotatably provided on the C-shaped plate (202) and meshing with the inner rack (500), a welding wire roller (502) for feeding welding wire being coaxially provided on the driving gear (501), and a free end of the welding wire extending to the welding head (203).

4. A metal door frame welding device according to claim 3, characterized in that: The C-shaped plate (202) is further provided with a compensation wire feeding assembly (6) for performing compensation wire feeding when the driving gear (501) moves to the notch. The compensation wire feeding assembly (6) includes a compensation gear (600) rotatably provided on the C-shaped plate (202) and meshing with the inner rack (500). A compensation roller is coaxially provided on the compensation gear (600). A driving roller is coaxially provided on the driving gear (501). The driving roller is connected to the compensation roller via a synchronous belt (601).

5. The metal door frame welding device according to claim 1, characterized in that: The limit drive assembly (1) includes a parallel rod (100) arranged between the clamping plate (8) and the base (12) and parallel to the clamping plate (8); a driving member (101) capable of driving the parallel rod (100) to move is provided on the base (12); through holes (102) are provided on both sides of the parallel rod (100); first hinge rods (103) are hingedly provided on both sides of the clamping plate (8); a hinge shaft is provided at the other end of the first hinge rod (103); the hinge shaft passes through the through hole (102) and is hinged to a second hinge rod (104) at the other end; and the second hinge rod (104) is hinged to the base (12) at the other end.

6. The metal door frame welding device according to claim 1, characterized in that: A notch (13) is provided on one side of the clamping plate (8), and a slide plate (14) parallel to the clamping plate (8) is provided on the notch (13) for sliding. The slide plate (14) and the notch (13) are attracted by an electromagnet to clamp the door frame strip. A plurality of rollers are provided on the slide plate (14) and the notch (13) relative to each other.

7. The metal door frame welding device according to claim 1, characterized in that: The housing (200) is provided with a giving way component (4) that can drive the positioning plate (11) to give way to facilitate welding of the welding head (203). The giving way component (4) includes a telescopic cylinder (400). The power end of the telescopic cylinder (400) is provided with a double-sided rack (402). The housing (200) is hingedly provided with an incomplete gear (404) on both sides of the double-sided rack (402). The other end of the incomplete gear (404) is provided with an adjusting rod (405). The adjusting rod (405) is slidably provided with a driving column (406). The other end of the driving column (406) is fixedly connected to the positioning plate (11).

8. A metal door frame welding device according to claim 7, characterized in that: The housing (200) is provided with a control switch (401) electrically connected to the drive motor (700) and the welding head (203), and a shifting rod (403) is provided at the free end of the double-sided rack (402) and is arranged relative to the control switch (401).

9. The metal door frame welding device according to claim 1, characterized in that: A knocking assembly (3) for knocking and removing welding slag is further provided on the inner side of the C-shaped plate (202). The knocking assembly (3) comprises a fixed cylinder (300) connected to the inner side of the C-shaped plate (202). A lifting rod (301) is slidably provided in the fixed cylinder (300). A spring (303) is provided between the lifting rod (301) and the fixed cylinder (300). A U-shaped plate (302) is provided at the bottom end of the lifting rod (301). A driving wheel (304) is provided at the free end of the U-shaped plate (302) for rotation. A connecting rod is provided between the driving wheels (304). A V-shaped rod (305) is hingedly provided on the inner side of the U-shaped rod via a torsion spring. A knocking head (306) is provided at one end of the V-shaped rod (305) for abutting against a door frame strip, and the other end is driven by the connecting rod and drives the knocking head (306) to knock back and forth.

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