Automatic welding device for fire doors

Abstract

The present invention discloses an automatic welding device for fire doors, comprising a workbench, a moving device and a clamping welding device are arranged on the workbench, and a supporting platform is arranged at the central position of the workbench, the moving device comprises a first sliding plate, a second sliding plate and a driving member, the first sliding plate is provided with a plurality of members located at the front and rear sides of the supporting platform, and the second sliding plate is also provided with a plurality of members located at the left and right sides of the supporting platform. The present invention provides an automatic welding device for fire doors, which can automatically support the door panels to be welded from the inside to the outside, complete the clamping work of the welded parts, automatically locate the right angles during welding, detect the plate thickness at the same time, and automatically adjust the current and spot welding time according to the plate thickness, thereby avoiding welding quality problems caused by the current and spot welding time not matching the welding plate thickness, thereby improving welding efficiency and improving welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of fire door manufacturing, in particular to an automatic welding device for fire doors. Background Art

[0002] Fire doors refer to doors that can meet the requirements of fire resistance stability, integrity and thermal insulation within a certain period of time. They are fireproof partitions with a certain degree of fire resistance, installed between fire compartments, evacuation stairwells, vertical shafts, etc. Fire doors are generally divided into wooden fire doors, steel fire doors and steel-wood fire doors according to the material, among which steel fire doors have the best fireproof effect;

[0003] Since fire doors are mainly installed in obvious locations such as evacuation stairwells, there are certain requirements for the appearance of fire doors. Therefore, mirror stainless steel is usually used as the door panel of steel fire doors. The mirror panel needs to be clamped after bending before welding. During the clamping process, the fire pushes the panel surface to move, and friction occurs between the panel surface and the clamping parts, thereby scratching the mirror surface and resulting in defective products. Summary of the invention

[0004] Aiming at the deficiencies in the prior art, the present invention provides an automatic welding device for fire doors.

[0005] To solve the above technical problems, the present invention is solved by the following technical solutions: an automatic welding device for fire doors, comprising a workbench, a moving device and a clamping welding device are arranged on the workbench, and a support platform is arranged at the central position of the workbench, the moving device comprises a first sliding plate, a second sliding plate and a driving member, the first sliding plate is provided with a plurality of sliding plates located at the front and rear sides of the support platform, and the second sliding plate is also provided with a plurality of sliding plates located at the left and right sides of the support platform, the driving member can drive two first sliding plates and two second sliding plates to approach or move away from the support platform at the same time, the clamping welding device comprises a mounting seat and a welding gun, a first sliding groove and a second sliding groove are arranged on the mounting seat, and a plurality of sliding plates are provided in the first sliding groove and the second sliding groove on each mounting seat for guiding sliding, the workpiece to be welded is placed on the support platform, the driving member drives the first sliding plate and the second sliding plate to move, the first sliding plate moves to drive the mounting seat to move in the front and rear directions, and the second sliding plate moves to drive the mounting seat to move in the left and right directions, so that the four mounting seats are respectively contacted with the four corner edges of the workpiece to be welded, the welding gun guide sliding is arranged on the mounting seat, and the welding gun welds the corner edges.

[0006] Its beneficial effect is that the bent door panel surface is clamped from the inside for welding, thereby avoiding detection with the mirror surface, thereby fundamentally eliminating the phenomenon of scratching the mirror surface during clamping. When the position of the welding work is offset, it can also automatically align and clamp the workpiece, thereby improving the requirements for positioning in the early stage of welding, thereby improving the welding efficiency of the equipment.

[0007] In the above scheme, preferably, the first sliding plate and the second sliding plate are both provided with threaded sleeves, the driving member includes a first threaded rod and a second threaded rod, the first threaded rod and the second threaded rod are rotatably arranged on a support platform, a motor is arranged in the support platform, which can drive the first threaded rod and the second threaded rod to rotate separately, the threaded sleeves on the front and rear first sliding plates are respectively threadedly arranged at both ends of the first threaded rod, and the threaded sleeves on the left and right second sliding plates are respectively threadedly arranged at both ends of the second threaded rod.

[0008] In the above scheme, preferably, the upper plane of the mounting seat is flush with the upper plane of the support table, and a planar ball bearing is arranged on the upper plane to facilitate the movement of the plate to be welded, and a planar ball bearing is also arranged on the bottom surface of the mounting seat, and the planar ball bearing on the bottom surface presses against the plane of the workbench.

[0009] In the above scheme, preferably, a third slide groove is opened in the mounting seat, and a winding drum is arranged at the bottom of the third slide groove, the welding gun is elastically guided and slidably arranged in the third slide groove, one end of the pull rope is connected to the bottom of the welding gun, and the other end is arranged on the winding drum.

[0010] In the above scheme, preferably, a sliding cavity is provided in the welding gun, a telescopic head is elastically slidably provided in the sliding cavity, and an electromagnet capable of pushing the telescopic head to extend forward is provided at the rear end of the sliding cavity, and the telescopic head reaches the welding position after being extended.

[0011] In the above scheme, preferably, a fourth slide groove is further provided in the mounting seat, and a lifting clamping member is slidably provided in the fourth slide groove, and the lifting clamping member includes a lifting block, a right-angle clamping block and a telescopic cylinder, the lifting block guide sliding is set in the fourth slide groove, and an electric push rod is used to control the up and down sliding, the rear end of the telescopic cylinder is set on the lifting block, and the front end of the telescopic rod is set on the right-angle clamping block.

[0012] In the above scheme, preferably, a guide rod is provided on the lifting block, a sliding hole is opened in the right-angle clamping block, and the sliding block is arranged on the guide rod through the sliding hole to guide the sliding, and a sliding block of a sliding rheostat is arranged at the front end of the guide rod, and the coil part of the sliding rheostat is arranged in the sliding hole. The sliding variable group is connected to the control circuit of the current size and spot welding time of the welding gun. The greater the sliding distance, the smaller the current and the spot welding time.

[0013] In the above scheme, preferably, the rear end of the telescopic cylinder is connected to the sliding cavity through a pipeline, and the telescopic head extends forward to draw the gas in the telescopic cylinder to the rear end of the sliding cavity, thereby synchronously controlling the right-angle clamping block to clamp on the outside of the workpiece to be welded.

[0014] The beneficial effects of the present invention are as follows: the present invention provides an automatic welding device for fire doors, which can automatically support the door panel to be welded from the inside to the outside, complete the clamping work of the welded parts, and automatically position the right angle during welding, while detecting the thickness of the plate, and automatically adjusting the current and spot welding time according to the thickness of the plate, thereby avoiding welding quality problems caused by the current and spot welding time not matching the thickness of the welding plate, thereby improving welding efficiency and improving welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the assembly of the moving device and the clamping welding device of the present invention.

[0017] Figure 3 It is a schematic diagram of the interior of the clamping welding device of the present invention.

[0018] Figure 4 It is a cross-sectional view of the welding gun of the present invention.

[0019] Figure 5 It is a schematic diagram of the mounting seat of the present invention.

[0020] Figure 6 It is a cross-sectional view of the clamping welding device of the present invention.

[0021] Figure 7 The present invention is Figure 4 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments: Figure 1-Figure 7 A fire door automatic welding device includes a workbench 1, a moving device 2 and a clamping welding device 3. The workbench 1 includes a circular platform plate and a support platform 11. The support platform 11 is located at the center of the circular platform plate. A plane ball, i.e., an embedded universal ball, is arranged on the plane of the support platform 11. The flat plate can move freely on the plane ball.

[0023] The bent mirror plate to be welded is pressed onto the support platform 11 by a robot or manually, and the contacted plate surface is the back side of the mirror stainless steel plate.

[0024] The moving device 2 includes a first sliding plate 21, a second sliding plate 22 and a driving member 23, wherein the first sliding plate 22 and the second sliding plate 23 are each provided with two pieces, and a threaded sleeve 211 is provided at the middle position of the first sliding plate 22 and the second sliding plate 23, and the driving member 23 includes a first threaded rod 231 and a second threaded rod 232, and the first threaded rod 231 and the second threaded rod 232 are rotatably provided at the middle position on the support platform 11, and the two are not on the same plane and are perpendicular to each other, and two independent motors are provided in the support platform 11, and the two independent motors can drive the first threaded rod 231 and the second threaded rod 232 respectively, and the left and right ends of the first threaded rod 231 and the second threaded rod 232 are both one side with positive thread and the other side with negative thread, and the threaded sleeves 211 on the front and rear first sliding plates 21 are respectively threadedly provided at the two ends of the first threaded rod 231, so that the first threaded rod 231 The threaded rod 231 rotates, which can make the front and rear two first sliding plates 21 move toward the support platform 11 or move outward at the same time. The threaded sleeves 211 on the left and right second sliding plates 22 are respectively threadedly arranged at the two ends of the second threaded rod 232, so that the second threaded rod 232 rotates, which can make the front and rear two second sliding plates 22 move toward the support platform 11 or move outward at the same time. The clamping welding device 3 includes a mounting seat 31, and a first sliding groove 311 and a second sliding groove 312 are arranged on the side surface of the mounting seat 31. The first sliding groove 311 and the second sliding groove 312 are perpendicular to each other and are staggered up and down and are no longer on the same plane. The first sliding groove 311 is slidably arranged with the first sliding plate 22, and the second sliding groove 312 is slidably arranged with the second sliding plate 22, wherein the mounting seat 31 is provided with four, which are respectively located at the four staggered positions of the first sliding plate 21 and the second sliding plate 22.

[0025] When the first threaded rod 231 and the second threaded rod 232 rotate, the right-angled square formed by the two first sliding plates 21 and the two second sliding plates 22 changes size, and the mounting seats 31 are slidably arranged at staggered positions, so that the four mounting seats 31 can touch the inner wall of the bending wall of the bending mirror panel placed on the support platform 11, and at the same time, the two side walls of the mounting seats 31 touch the right-angle side walls of the bending mirror panel.

[0026] A first pressure touch switch 315 and a second pressure touch switch 316 are arranged on the two outward side surfaces of the mounting seat 31 , and planar balls are arranged on the upper and lower planes of the mounting seat 31 , and the upper plane of the mounting seat 31 is flush with the upper plane of the support platform 11 .

[0027] When the folding plate 31 is moved to the left and right sides of the support frame 11, the first and second pressure-touch switches 315, 316 are pressed and touched, and the motor 310 is rotated continuously.

[0028] The clamping welding device 3 also includes a welding gun 32 and a lifting clamp 33. The welding gun 32 is a cold welding gun. An argon gas channel is arranged on the welding gun 32. A welding gun sliding groove 317 is vertically provided at the diagonal position of the mounting seat 31. When the bent mirror panel is locked, the welding gun sliding groove 317 is aligned with the right angle formed by the bent edge of the bent mirror panel, that is, the area to be welded. A third sliding groove 313 and a fourth sliding groove 314 are also provided on the mounting seat 31. A winding drum 322 is arranged at the bottom of the third sliding groove 313. The welding gun 32 is guided and slidably arranged in the third sliding groove 313 and is located in the welding gun sliding groove 317 at the same time. One end of a pull rope 321 is connected to the bottom of the welding gun 32, and the other end is arranged on the winding drum 322. A first elastic member 325 is arranged in the third sliding groove 313, and the two ends are respectively in contact with each other. The bottom of the welding gun 32 and the bottom of the third slide groove 313 make the welding gun 32 touch the upper end of the third slide groove 313 in the initial state. When the winding drum 322 starts to rotate, it drives the welding gun 32 to slide downward. A sliding cavity 323 is provided in the welding gun 32. A telescopic head 327 is provided for the piston sliding in the sliding cavity 323, and a second elastic member 326 is sleeved on the telescopic head 327, and its two ends respectively touch the piston ring of the telescopic head 327 and the front end surface of the sliding cavity 323. An electromagnet 324 is provided on the rear end surface of the sliding cavity 323. The piston ring of the telescopic head 327 has a magnetic pole. When the electromagnet 324 is energized, it can push the telescopic head 327 to extend forward. A tungsten needle is provided at the front end of the telescopic head 327. When the telescopic head 327 is extended, it is just aligned with the welding position.

[0029] When the bent mirror panel is locked, the welding gun 32 touches the upper end of the third slide groove 313. At this time, the electromagnet 324 is energized to extend the telescopic head 327. At this time, the tip of the tungsten needle at the front end of the telescopic head 327 is close to the bottom of the bend. The welding gun 32 moves downward to complete the welding of the welding area. The welding gun 32 performs spot welding under argon protection. Before welding, the spot welding current and spot welding time need to be adjusted according to the thickness of the welding plate.

[0030] The lifting clamping member 33 includes a lifting block 331, a right-angle clamping block 332 and a telescopic cylinder 333. A guide rod 3311 is arranged on the lifting block 331. The direction of the guide rod 3311 is consistent with the direction of the welding gun sliding groove 317. A sliding hole 3321 is opened in the right-angle clamping block 332. The guide sliding is set on the guide rod 3311 through the sliding hole 3321. The telescopic cylinder 333 is set on the lifting block 331. The front end of the telescopic rod of the cylinder is set on the right-angle clamping block 332. The rear end of the telescopic cylinder 333 is connected with the sliding cavity 323 through a pipeline. The telescopic head 327 extends forward to draw the gas in the telescopic cylinder 333 to the rear end of the sliding cavity 323. The lifting block 331 is set in the fourth sliding groove 314 for guiding sliding. An electric push rod is arranged at the lower end. The electric push rod controls the lifting and lowering of the lifting block 331.

[0031] When the bending mirror panel is locked, the electric push rod starts to work and pushes the lifting block 331 to move upward. During the movement, when the bottom plate of the right-angle clamping block 332 touches the bending edge of the bending mirror panel, the electric push rod is controlled to stop extending, and the electromagnet 324 is energized, so that the telescopic head 327 extends forward, the space at the rear end of the piston ring of the telescopic head 32 increases, and the gas in the telescopic cylinder 333 is pumped into the space at the rear end of the piston ring of the telescopic head 32 through the pipeline, so that the telescopic cylinder 333 contracts, and the right-angle clamping block 332 moves toward the welding gun. 32 direction, and touches the right-angled edge of the bending mirror panel. A sliding block of a sliding rheostat is arranged at the front end of the guide rod 3311, and the coil part of the sliding rheostat is arranged in the sliding hole 3321. The sliding rheostat is connected to the control circuit of the current size and spot welding time of the welding gun 32. According to the thickness of the bending mirror panel, the sliding block at the front end of the guide rod 3311 is stopped at different positions of the coil of the sliding rheostat, thereby automatically controlling the required current and spot welding time. The smaller the thickness of the plate, the longer the distance that the guide rod 3311 slides in, and the smaller the current and spot welding time.

[0032] When the telescopic head 327 is extended forward, the piston ring of the telescopic head 327 touches the limiter of the sliding cavity 323, and the air at the front end of the piston ring flows out from the small hole on the side of the limiter, so that the extension distance of the telescopic head 327 is fixed each time, and the space in the telescopic cylinder 333 is smaller than the space at the rear end of the piston ring of the telescopic head 327. Therefore, when the telescopic head 327 is extended, the sliding cavity 323 is in a negative pressure state. Therefore, no matter how thick the plate is, the right-angle clamping block 332 presses on the outer surface of the plate.

[0033] Its working principle or usage is as follows:

[0034] The bent mirror panel to be welded is pressed onto the support platform 11 by a robot or manually, and the motor in the support platform 11 is started, driving the mounting seat 31 to move outward. During the movement, one or two of the four mounting seats 31 first touch one side of the folded edge of the bent mirror panel, and the first pressure-touch switch 315 or the second pressure-touch switch 316 is pressed. At this time, the motor continues to rotate, and when the mounting seat 31 on the corresponding side also touches the corresponding side of the folded edge of the bent mirror panel, the first pressure-touch switch 315 or the second pressure-touch switch 316 on the two symmetrical mounting seats 31 are pressed at the same time, thereby controlling the motor that drives the mounting seat 31 to move to these two sides to stop rotating. Similarly, when the other motor also stops rotating, the four mounting seats 31 are located at the four right angles of the bent mirror panel, and touch the side walls on both sides of the four right angles from the inside, locking the bent mirror panel so that it can no longer move.

[0035] At this time, the electric push rod starts to work, pushing the lifting block 331 to move upward. During the movement, when the bottom plate of the right-angle clamping block 332 touches the bending edge of the bending mirror panel, the electric push rod is controlled to stop extending, and the electromagnet 324 is controlled to be energized, so that the telescopic head 327 extends forward, and the space at the rear end of the piston ring of the telescopic head 32 increases. The gas in the telescopic cylinder 333 is pumped into the space at the rear end of the piston ring of the telescopic head 32 through the pipeline, so that the telescopic cylinder 333 contracts, and the right-angle clamping block 332 moves toward the welding gun 32. , it touches the right-angled edge of the bending mirror panel, and a sliding block of a sliding rheostat is arranged at the front end of the guide rod 3311, and the coil part of the sliding rheostat is arranged in the sliding hole 3321. The sliding rheostat is connected to the control circuit of the current size and spot welding time of the welding gun 32. According to the thickness of the bending mirror panel, the sliding block at the front end of the guide rod 3311 is stopped at different positions of the coil of the sliding rheostat, thereby automatically adjusting the required current and spot welding time. The smaller the thickness of the plate, the longer the distance that the guide rod 3311 slides in, and the smaller the current and spot welding time.

[0036] At this time, the tip of the tungsten needle at the front end of the telescopic head 327 is close to the bottom of the bend, the winding reel 322 starts working, and the welding gun 32 moves slowly downward. During the downward movement, continuous spot welding starts automatically. When the tungsten needle at the front end of the telescopic head 327 passes through the bottom plate of the right-angle clamping block 332, the detection switch laser detector on the bottom plate detects it, thereby stopping the continuous spot welding work.

[0037] At this time, the electromagnet 324 is powered off, and the telescopic head 327 returns to its original position under the action of the second elastic member 326. That is, all the gas at the rear end of the piston ring of the telescopic head 32 is passed into the telescopic cylinder 333, so that the telescopic cylinder 333 extends forward, and the right-angle clamping block 332 moves outward without contacting the workpiece. At the same time, the winding reel 322 stops working, and the welding gun 32 slides upward under the action of the first elastic member 325, and touches the upper end surface of the third slide groove 313 again. The motor in the support platform 11 starts to rotate in the opposite direction, so that the mounting seat 31 moves inward and returns to its original position, thereby canceling the clamping of the workpiece.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic welding device for fire doors, characterized in that: The invention comprises a workbench (1), on which a moving device (2) and a clamping welding device (3) are arranged, and a supporting platform (11) is arranged at the central position of the workbench (1). The moving device (2) comprises a first sliding plate (21), a second sliding plate (22) and a driving member (23); two first sliding plates (21) are provided on the front and rear sides of the support platform (11); two second sliding plates (22) are also provided on the left and right sides of the support platform (11); and the driving member (23) can drive the two first sliding plates (21) and the two second sliding plates (22) to move towards or away from the support platform (11) at the same time; The clamping welding device (3) comprises a mounting seat (31) and a welding gun (32); the mounting seat (31) is provided with a first sliding groove (311) and a second sliding groove (312); four mounting seats (31) are provided, and a first sliding plate (21) and a second sliding plate (22) are provided in a guiding and sliding manner in the first sliding groove (311) and the second sliding groove (312) on each mounting seat (31); The workpiece to be welded is placed on the support table (11), the driving member (23) drives the first sliding plate (21) and the second sliding plate (22) to move, the first sliding plate (21) moves to drive the mounting seat (31) to move in the front-rear direction, and the second sliding plate (22) moves to drive the mounting seat (31) to move in the left-right direction, so that the four mounting seats (31) are respectively in contact with the four folded corners of the workpiece to be welded, and the welding gun (32) is guided and slidably arranged on the mounting seat (31), and the welding gun (32) welds the folded corners; The mounting seat (31) is further provided with a fourth slide groove (314), a lifting clamping member (33) is slidably provided in the fourth slide groove (314), the lifting clamping member (33) comprising a lifting block (331), a right-angle clamping block (332) and a telescopic cylinder (333), the lifting block (331) is guided and slidably provided in the fourth slide groove (314), and an electric push rod is provided to control the upward and downward sliding, the rear end of the telescopic cylinder (333) is provided on the lifting block (331), and the front end of the telescopic rod is provided on the right-angle clamping block (332); A guide rod (3311) is arranged on the lifting block (331), a sliding hole (3321) is opened in the right-angle clamping block (332), and a sliding block is arranged on the guide rod (3311) through the sliding hole (3321), and a sliding rheostat is arranged at the front end of the guide rod (3311), and a coil part of the sliding rheostat is arranged in the sliding hole (3321). The sliding rheostat is connected to the control circuit of the current size and spot welding time of the welding gun (32), and the greater the sliding distance, the smaller the current and spot welding time.

2. The automatic welding device for fire doors according to claim 1, characterized in that: The first sliding plate (21) and the second sliding plate (22) are both provided with a threaded sleeve (211), the driving member (23) comprises a first threaded rod (231) and a second threaded rod (232), the first threaded rod (231) and the second threaded rod (232) are rotatably arranged on the support platform (11), a motor is arranged in the support platform (11), and the first threaded rod (231) and the second threaded rod (232) are driven to rotate separately, the threaded sleeves (211) on the front and rear first sliding plates (21) are respectively threadedly arranged on the two ends of the first threaded rod (231), and the threaded sleeves (211) on the left and right second sliding plates (22) are respectively threadedly arranged on the two ends of the second threaded rod (232).

3. The automatic welding device for fire doors according to claim 1, characterized in that: The upper plane of the mounting seat (31) is flush with the upper plane of the support platform (11), and a plane ball bearing is arranged on the upper plane to facilitate the movement of the plate to be welded, and a plane ball bearing is also arranged on the bottom surface of the mounting seat (31), and the plane ball bearing on the bottom surface presses against the plane of the workbench (1).

4. The automatic welding device for fire doors according to claim 1, characterized in that: A third slide groove (313) is provided in the mounting seat (31), and a wire reel (322) is provided at the bottom of the third slide groove (313). The welding gun (32) is elastically guided and slidably provided in the third slide groove (313), and one end of a pull rope (321) is connected to the bottom of the welding gun (32), and the other end is provided on the wire reel (322).

5. The automatic welding device for fire doors according to claim 1, characterized in that: The welding gun (32) is provided with a sliding cavity (323), a telescopic head (327) is elastically slidably provided in the sliding cavity (323), and an electromagnet (324) capable of pushing the telescopic head (327) to extend forward is provided at the rear end of the sliding cavity (323), and the telescopic head (327) reaches the welding position after being extended.

6. The automatic welding device for fire doors according to claim 5, characterized in that: The rear end of the telescopic cylinder (333) is connected to the sliding cavity (323) through a pipeline, and the telescopic head (327) extends forward to draw gas in the telescopic cylinder (333) to the rear end of the sliding cavity (323), thereby synchronously controlling the right-angle clamping block (332) to clamp on the outside of the workpiece to be welded.

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