Fireproof door frame welding positioning clamp

Abstract

This invention discloses a welding positioning fixture for fire door frames, belonging to the technical field of fire door processing equipment. The fire door frame welding positioning fixture includes a vertical plate, an inner support mechanism, an outer push mechanism, a dust removal mechanism, a tray, and a second motor. The inner support mechanism uses a first top block and a second top block to press the inner sides of the two vertical frames together, with the first top block providing support at the internal corner where the horizontal and vertical frames connect. The outer push mechanism uses an outer push component that engages with the grooves in the vertical frames to push and position them from the outside. The dust removal mechanism uses a hollow pressure plate that can be inserted into the upper groove of the horizontal frame to press down on the horizontal frame and extract and filter welding fumes. The second motor drives the vertical plate to rotate relative to the tray, cooperating with the welding groove to allow continued welding on the other side of the door frame connection. This fixture can improve the welding clamping stability of the door frame, reduce the inward shrinkage deformation of the corners after welding, and improve the continuity of double-sided welding and the effect of welding fume treatment.

Description

Technical Field

[0001] This invention belongs to the technical field of fire door processing equipment, and particularly relates to a fire door frame welding positioning fixture. Background Technology

[0002] Fire door frames are typically formed by splicing two vertical frames and one horizontal frame. For welding such door frame components, it is generally necessary to clamp and position the vertical and horizontal frames before welding, ensuring the connection points of the horizontal and vertical frames are in a predetermined relative position before proceeding with welding. For door frame profiles with grooves on the opposite side of the vertical frame and grooves on the upper part of the horizontal frame, the clamping and positioning not only involves limiting the position of the frame itself but also relates to the support of the connecting corner area, maintaining the compressed state of the horizontal frame, and reserving space for welding operations. When welding is required on both sides of the connection, it is also necessary to consider the support stability after the workpiece rotates and the ease of welding the weld on the other side.

[0003] However, existing door frame welding positioning fixtures mainly consist of flat blocks, lateral clamping, or overall flipping brackets. For fire door frame profiles with grooves on the outside of the vertical frame and grooves on the top of the horizontal frame, the following shortcomings still exist: First, the outer clamping parts are difficult to adapt to grooves at different heights simultaneously, and local deformation is easily caused when the clamping point is inconsistent with the stress position of the profile; Second, the inner support is lacking at the inside corner where the horizontal and vertical frames connect, which easily leads to corner shrinkage and a reduction in the net width of the top opening after welding and cooling; Third, when welding is required on the other side of the horizontal and vertical frames, repeated clamping and realigning are often required, affecting the consistency of the door frame connection dimensions. Summary of the Invention

[0004] The purpose of this invention is to provide a welding positioning fixture for fire door frames, which solves the problems of unstable clamping and positioning during welding of fire door frames, easy inward shrinkage and deformation of corners after welding, and inconvenience of double-sided welding.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fire door frame welding and positioning fixture is used to clamp and position a fire door frame composed of two vertical frames and one horizontal frame. The fixture includes: a vertical plate having multiple first guide rails, two second guide rails, a support plate, and two welding grooves; an inner support mechanism disposed on the support plate and cooperating with the first guide rails, the inner support mechanism having a first top block and a second top block respectively abutting against the inner sides of the two vertical frames, the first top block abutting against the internal corner at the connection between the horizontal and vertical frames; and an outer pushing mechanism disposed on both sides of the vertical plate and cooperating with the second guide rails. The structure includes an outward push assembly that can engage with the groove of the vertical frame; a dust removal mechanism located at the top of the vertical plate, the dust removal mechanism having a hollow pressure plate that can be inserted into the groove of the upper part of the horizontal frame; a tray with a second motor mounted on its top surface, the power output shaft of the second motor being fixedly connected to the center position of the bottom surface of the vertical plate; wherein, the inner support mechanism and the outward push mechanism cooperate to clamp and fix the two vertical frames, the dust removal mechanism presses down on the horizontal frame, and the vertical plate can rotate relative to the tray to weld the other side of the connection between the horizontal frame and the vertical frame through the welding groove.

[0007] Preferably, the internal support mechanism includes: a first motor mounted on the top surface of the support plate, with a lead screw mounted on its power output shaft; a first lead screw nut mounted on the lead screw, with two first hinge rods hinged thereon; two first top blocks, each hinged to one of the two first hinge rods; a plurality of second lead screw nuts, all mounted on the lead screw, each second lead screw nut hinged to two second hinge rods; a plurality of second top blocks, each hinged to one of the plurality of second hinge rods, wherein each of the first and second top blocks has a first sliding groove, and the first and second top blocks are slidably connected to the corresponding first guide rails through the first sliding grooves.

[0008] Preferably, the push-out mechanism includes: two square tubes, each square tube having a second sliding groove at its bottom, and each tube being slidably connected to a corresponding second guide rail via the second sliding groove; two second pins installed on opposite sides of the two square tubes; multiple push-out components, each installed on one of the two square tubes; an adjustment component connected to the two square tubes for adjusting the distance between the two square tubes; and a drive component connected to the adjustment component for driving the adjustment component to move; wherein, the square tubes have strip grooves, and the installation positions of the multiple push-out components can be adjusted along the strip grooves.

[0009] Preferably, the push-out assembly includes: a hollow seat, slidably connected to the square tube via a slider; a bolt, mounted on the slider, passing through the strip groove and slidably connected to the strip groove, and threadedly engaged with a nut located outside the square tube; a mounting plate, slidably connected inside the hollow seat; a plurality of first springs, mounted between the mounting plate and the hollow seat; and an insert, mounted on the side of the mounting plate away from the first springs, extending outside the hollow seat and slidably connected to the hollow seat; wherein the insert can elastically extend and retract relative to the hollow seat under the action of the first springs.

[0010] Preferably, the push-out assembly further includes: two hinged seats hinged to the side of the hollow seat away from the slider, and rollers rotatably connected to the hinged seats; and a plurality of second springs mounted on the hinged seats, with their other ends fixedly connected to the hollow seat.

[0011] Preferably, the adjustment assembly includes: four rotating shafts, each passing through the vertical plate and rotatably connected to the vertical plate, with a disc and a gear respectively connected to both ends of the rotating shafts; four first pins, each mounted on one of the four discs; and four third hinge rods, which are used to connect the first pins and the second pins.

[0012] Preferably, the driving assembly includes: two slide rods, both fixedly connected to the vertical plate; a first hydraulic cylinder, mounted on the vertical plate; a movable frame, mounted on the extension end of the first hydraulic cylinder and slidably connected to the two slide rods; and four racks, respectively connected to the two sides of the movable frame and meshing with the four gears, so as to drive the two square tubes to move synchronously in opposite directions or synchronously in opposite directions.

[0013] Preferably, the dust removal mechanism includes: a horizontal plate, installed on the top of the vertical plate, with a filter and an air extractor installed on its top surface, the air extraction pipe of the air extractor being connected to the filter; a second hydraulic cylinder, installed on the bottom surface of the horizontal plate, the hollow pressure plate being installed on the extension end of the second hydraulic cylinder; and an insert pipe, installed on the bottom surface of the filter, communicating with the interior of the filter and extending to the bottom of the horizontal plate.

[0014] Preferably, the hollow pressure plate includes: a horizontal portion, on the top of which a vertical tube is installed, the vertical tube being slidably inserted into the insertion tube; and two inclined portions connected to both sides of the horizontal portion, the inclined portions having dust suction grooves.

[0015] Preferably, the side of the tray is provided with an annular groove, and two support rods are installed on the bottom surface of the vertical plate, with the other ends of the two support rods slidably connected to the annular groove; the two welding grooves correspond to the connection parts between the two ends of the horizontal frame and the two vertical frames, respectively.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. This invention provides an adjustable push-out component on a square tube and uses a slider, bolt, and slot to adjust the position, allowing the insert and roller to correspond to the groove positions of vertical frames of different specifications. At the same time, the insert elastically extends and retracts under the action of the first spring, and the roller elastically fits the corresponding part of the groove under the action of the second spring. This reduces the adverse effects of rigid pressure on the profile while completing the outer positioning, thereby improving the adaptability of the fixture within a certain specification range.

[0018] 2. This invention uses a first hydraulic cylinder, rack, gear, shaft, disc, and third hinge rod to drive two square tubes to move closer synchronously, so that the outward pushing component is pushed and positioned from the outside of the vertical frame; then, the first motor, lead screw, first top block, and second top block are synchronously pressed from the inside of the vertical frame, and the hollow pressure plate presses down on the horizontal frame, thereby forming a stable clamping constraint in the connection area between the horizontal and vertical frames; in particular, the two first top blocks provide inner support for the connecting inside corner, which helps to reduce the adverse effects of corner shrinkage after welding, reduction of the net width of the top opening, and smaller included angle.

[0019] 3. This invention sets the hollow pressure plate as a hollow structure that combines pressing and extraction functions, and sets a dust collection groove and a vertical pipe on it, and keeps the vertical pipe and the insertion pipe in a sliding connection, so that the air extraction passage is continuously connected during the lifting and lowering of the hollow pressure plate; welding fumes can enter the interior of the hollow pressure plate through the dust collection groove, be transported to the filter through the insertion pipe and extracted by the air extractor, thereby completing the extraction and filtration of near the weld point without affecting the pressing state of the horizontal frame.

[0020] 4. This invention achieves overall rotation of the fixture while maintaining the door frame clamping state by setting a second motor, support rod and an annular groove that cooperate with the pallet at the bottom of the vertical plate, and opening a welding groove on the vertical plate corresponding to the welding position. After welding on one side is completed, the vertical plate can be rotated directly and welding can continue at the connection on the other side, thereby reducing the process of repeated clamping and realigning of the workpiece, which is conducive to maintaining the consistency of the relative position before and after welding and improving the continuity of double-sided welding operation. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the assembly structure of the fire door frame welding positioning fixture, horizontal frame, and vertical frame in this invention;

[0023] Figure 2 This is a schematic diagram of the front structure of the welding positioning fixture for the fire door frame in this invention;

[0024] Figure 3 This is a schematic diagram of the back structure of the welding positioning fixture for the fire door frame in this invention;

[0025] Figure 4 This is a schematic diagram of the vertical plate in this invention;

[0026] Figure 5 This is a schematic diagram of the internal support mechanism in this invention;

[0027] Figure 6 This is a schematic diagram of the extrapolation mechanism in this invention;

[0028] Figure 7 This is a schematic diagram of the extrapolation component in this invention;

[0029] Figure 8 This is an exploded structural diagram of the extrapolation component in this invention;

[0030] Figure 9 This is a schematic diagram of the horizontal and vertical frames in this invention;

[0031] Reference numerals: 101, Vertical plate; 102, First guide rail; 103, Support plate; 104, Second guide rail; 105, Welding groove; 106, Support rod; 200, Internal support mechanism; 201, First motor; 202, Lead screw; 203, First lead screw nut; 204, First hinge rod; 205, First top block; 206, Second lead screw nut; 207, Second hinge rod; 208, Second top block; 209, First slide groove; 210, Elastic band; 300, Push mechanism; 301, Square tube; 302, Strip groove; 303, Second slide groove; 304, Second pin; 310, Push assembly; 311, Hollow seat; 312, Slider; 313, Bolt; 314 315. Insert block; 316. Mounting plate; 317. First spring; 318. Hinge seat; 319. Roller; 320. Second spring; 321. Adjustment assembly; 322. Rotating shaft; 323. Disc; 324. First pin; 325. Third hinge rod; 326. Gear; 337. Drive assembly; 338. Slide rod; 339. First hydraulic cylinder; 330. Moving frame; 331. Rack; 400. Dust removal mechanism; 401. Horizontal plate; 402. Second hydraulic cylinder; 403. Hollow pressure plate; 404. Dust suction trough; 405. Vertical pipe; 406. Filter; 407. Insert tube; 408. Air extractor; 501. Tray; 502. Second motor; 503. Annular groove. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more readily understood, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] This invention is described in detail with reference to the accompanying drawings. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not to scale. Furthermore, the accompanying drawings are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0034] Furthermore, it should be noted in the description of this invention that the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Example: Figures 1 to 9 As shown, a fire door frame welding positioning fixture is used to clamp and position the fire door frame. The fire door frame consists of two vertical frames and one horizontal frame. The two vertical frames are provided with grooves on opposite sides, and the upper part of the horizontal frame is also provided with a groove.

[0036] A fire door frame welding positioning fixture includes a vertical plate 101, on which multiple first guide rails 102 and two second guide rails 104 are installed. The multiple first guide rails 102 are spaced apart along the height direction of the vertical plate 101. A support plate 103 is also installed on the vertical plate 101. The fire door frame welding positioning fixture also includes an inner support mechanism 200, an outer push mechanism 300, and a dust removal mechanism 400. The inner support mechanism 200 and the outer push mechanism 300 cooperate to clamp and fix the two vertical frames. The dust removal mechanism 400 is used to press the horizontal frame and to extract and filter the smoke and gas during the welding process.

[0037] like Figure 5 As shown, the internal support mechanism 200 includes a first motor 201, a lead screw 202, a first lead screw nut 203, two first hinge rods 204, two first top blocks 205, multiple second lead screw nuts 206, multiple second hinge rods 207, multiple second top blocks 208, a first slide groove 209, and an elastic band 210.

[0038] A first motor 201 is mounted on the top surface of the support plate 103. A lead screw 202 is mounted on the power output shaft of the first motor 201. The lead screw 202 has a first lead screw nut 203 and multiple second lead screw nuts 206. Two first hinge rods 204 are hinged to the first lead screw nut 203, and a first top block 205 is hinged to the other end of each of the two first hinge rods 204. Two second hinge rods 207 are hinged to the multiple second lead screw nuts 206, and a second top block 208 is hinged to the other end of each of the two second hinge rods 207. A first sliding groove 209 is provided on both the first top block 205 and the second top block 208, and the first top block 205 and the second top block 208 are slidably connected to the corresponding first guide rail 102 through the first sliding groove 209. An elastic band 210 is connected between the two first top blocks 205, and an elastic band 210 is also connected between the two second top blocks 208 at the same height. The first top block 205 is used to provide abutment support at the inside corner of the connection between the horizontal and vertical frames, and multiple second top blocks 208 are used to provide inner abutment support at the remaining positions of the two vertical frames. The elastic band 210 is used to provide a pull-back force to the corresponding top block after the first top block 205 and the second top block 208 release their clamping force on the workpiece, so as to assist the top block in resetting and reduce the swaying under no-load conditions.

[0039] Specifically, when the first motor 201 is running, it drives the lead screw 202 to rotate, which in turn drives the first lead screw nut 203 and multiple second lead screw nuts 206 to move up and down along the lead screw 202. Through the first hinge rod 204 and the second hinge rod 207, the first top block 205 and the second top block 208 move along the corresponding first guide rail 102, so that the two first top blocks 205 move simultaneously in opposite directions or simultaneously in opposite directions. The two second top blocks 208 located at the same height also move synchronously in opposite directions or synchronously in opposite directions, thereby forming a tight positioning of the two vertical frames from the inside out.

[0040] like Figures 6 to 8 As shown, the push mechanism 300 includes two square tubes 301, multiple push components 310, an adjustment component 320, and a drive component 330. A second sliding groove 303 is provided at the bottom of each square tube 301, and the square tube 301 is slidably connected to the second guide rail 104 through the second sliding groove 303, thereby allowing the two square tubes 301 to move towards or away from the vertical plate 101. A strip groove 302 is provided on each square tube 301, and the strip groove 302 is used to cooperate with the installation position adjustment of the push components 310. Two second pins 304 are installed on the opposite sides of each of the two square tubes 301.

[0041] like Figure 7 and Figure 8As shown, the push-out assembly 310 includes a hollow base 311, a slider 312, a bolt 313, an insert block 314, a mounting plate 315, multiple first springs 316, two hinge seats 317, a roller 318, and multiple second springs 319. The hollow base 311 is slidably connected to the square tube 301 via the slider 312. The bolt 313 is mounted on the slider 312, and the bolt 313 passes through the strip groove 302 and is slidably connected to the strip groove 302. A nut is also threaded onto the bolt 313, and the nut is located on the outside of the square tube 301 to lock the push-out assembly 310 at a predetermined height position on the square tube 301. A mounting plate 315 is slidably connected inside the hollow base 311. Multiple first springs 316 are installed between the mounting plate 315 and the hollow base 311. An insert block 314 is installed on the side of the mounting plate 315 away from the first springs 316. The insert block 314 extends to the outside of the hollow base 311 and is slidably connected to the hollow base 311. Two hinge seats 317 are hingedly connected on the side of the hollow base 311 away from the slider 312. Multiple second springs 319 are installed on the hinge seats 317. The other end of the second springs 319 is fixedly connected to the hollow base 311. A roller 318 is rotatably installed on the hinge seats 317.

[0042] Specifically, the insert block 314, hinge seat 317, and roller 318 are used to insert into the groove of the vertical frame. The insert block 314, in cooperation with the mounting plate 315 and the first spring 316, can elastically extend and retract relative to the hollow seat 311. The hinge seat 317 and roller 318, under the action of the second spring 319, can elastically fit into the groove. This allows the push-out assembly 310 to achieve external positioning when inserted into the groove of the vertical frame, while also reducing the adverse effects of rigid pressure on the profile. After the push-out assembly 310 cooperates with the first top block 205 and the second top block 208 in the inner support mechanism 200, they can jointly clamp and fix the vertical frame.

[0043] like Figure 6 As shown, the adjustment assembly 320 is used to adjust the distance between the two square tubes 301. The adjustment assembly 320 includes four rotating shafts 321, four discs 322, four first pins 323, four third hinge rods 324, and four gears 325. All four rotating shafts 321 pass through the vertical plate 101 and are rotatably connected to it. A disc 322 is mounted on one end of the rotating shaft 321 on the front side of the vertical plate 101. A first pin 323 is mounted on the disc 322. The four first pins 323 are connected to the four second pins 304 respectively through the four third hinge rods 324. A gear 325 is fixedly connected to one end of the rotating shaft 321 on the back side of the vertical plate 101.

[0044] Specifically, when the rotating shaft 321 rotates, the disc 322 rotates synchronously, which in turn drives the two square tubes 301 to perform spacing adjustment movements through the first pin 323, the third hinge rod 324, and the second pin 304.

[0045] like Figure 3 and Figure 6 As shown, the drive assembly 330 is used to drive the adjustment assembly 320. The drive assembly 330 includes two slide rods 331, a first hydraulic cylinder 332, a moving frame 333, and four racks 334. Both slide rods 331 are fixedly connected to the vertical plate 101. The first hydraulic cylinder 332 is installed on the back of the vertical plate 101. The moving frame 333 is connected to the extension end of the first hydraulic cylinder 332. The moving frame 333 is slidably connected to the two slide rods 331. Two racks 334 are respectively connected to the two sides of the moving frame 333. The four racks 334 are respectively meshed with four gears 325.

[0046] Specifically, when the first hydraulic cylinder 332 operates, it drives the movable frame 333 to move along the slide rod 331. As the movable frame 333 moves, it drives the four racks 334 to move synchronously. The four racks 334 then drive the four gears 325 to rotate, which in turn drive the corresponding rotating shafts 321 and discs 322 to rotate synchronously. The discs 322, through the first pin 323, the third hinge rod 324, and the second pin 304, drive the two square tubes 301 to move synchronously in opposite directions or synchronously in opposite directions. Since multiple push-out components 310 are mounted on the two square tubes 301, when the two square tubes 301 approach each other, the multiple push-out components 310 will move synchronously toward the grooves of the two vertical frames, causing the insert blocks 314 and rollers 318 to insert into the grooves, thereby pushing and positioning the vertical frames from the outside.

[0047] like Figure 2 As shown, the dust removal mechanism 400 includes a horizontal plate 401, a second hydraulic cylinder 402, a hollow pressure plate 403, a dust collection trough 404, a vertical pipe 405, a filter 406, an insertion pipe 407, and an exhaust fan 408. The horizontal plate 401 is installed on the top of the vertical plate 101. The filter 406 and the exhaust fan 408 are installed on the top surface of the horizontal plate 401. The exhaust pipe of the exhaust fan 408 is connected to the filter 406. An insertion pipe 407 is installed on the bottom surface of the filter 406. The insertion pipe 407 communicates with the interior of the filter 406 and extends to the bottom of the horizontal plate 401. The filter 406 is equipped with a removable filter element.

[0048] A second hydraulic cylinder 402 is mounted on the bottom surface of the horizontal plate 401, and a hollow pressure plate 403 is mounted on the extended end of the second hydraulic cylinder 402. The hollow pressure plate 403 consists of a horizontal part and two inclined parts. A vertical tube 405 is mounted on the horizontal part, and the vertical tube 405 is slidably inserted into the insertion tube 407. Dust suction grooves 404 are provided on both inclined parts.

[0049] Specifically, the hollow pressure plate 403 can be inserted into the groove at the top of the horizontal frame and pressed down on the horizontal frame under the drive of the second hydraulic cylinder 402, so that the horizontal frame is tightly connected to the two vertical frames. Since the vertical pipe 405 and the insertion pipe 407 are slidably connected, the hollow pressure plate 403 can still maintain air passage communication with the filter 406 during the lifting and lowering process; the fumes generated during welding can enter the hollow pressure plate 403 through the dust collection groove 404, and then be transported to the filter 406 through the vertical pipe 405 and the insertion pipe 407, and finally be drawn away by the air extractor 408, so as to achieve the extraction and filtration of welding fumes.

[0050] like Figures 1 to 3 As shown, the fire door frame welding positioning fixture also includes a tray 501. An annular groove 503 is provided on the side of the tray 501. A second motor 502 is mounted on the top surface of the tray 501, and the power output shaft of the second motor 502 is fixedly connected to the center of the bottom surface of the vertical plate 101. The other ends of the two support rods 106 on the bottom surface of the vertical plate 101 are slidably connected to the annular groove 503.

[0051] like Figure 4 As shown, two welding grooves 105 are also formed through the vertical plate 101. The two welding grooves 105 are located at the connection between the horizontal frame and the vertical frame, so that the welding equipment can weld the corresponding welding positions from the other side of the vertical plate 101. Two support rods 106 are installed on the bottom surface of the vertical plate 101. The two support rods 106 cooperate with the annular grooves 503 formed on the tray 501. When the vertical plate 101 rotates, the second motor 502 provides a rotational driving force to the vertical plate 101, and the two support rods 106 slide circumferentially in the annular grooves 503 to support and guide the outer periphery of the bottom of the vertical plate 101.

[0052] Specifically, the two welding grooves 105 correspond to the connection points of the two ends of the horizontal frame and the two vertical frames, respectively. In the initial clamping state, the welding equipment can directly weld the connection points facing the operator. After the vertical plate 101 rotates, the welding equipment then welds the connection points on the other side through the two welding grooves 105.

[0053] Working principle: In actual use, first adjust the installation position of multiple push-out components 310 on the two square tubes 301 according to the height of the two vertical frames of the fire door frame to be welded and the position of their grooves. Specifically, loosen the nuts on the bolts 313 so that the slider 312 drives the hollow seat 311 to slide along the square tube 301 to the position corresponding to the groove of the vertical frame. Then tighten the nuts to fix the multiple push-out components 310 at the corresponding height.

[0054] Then, place the two vertical frames in the clamping area on the front of the vertical plate 101, so that the grooves of the two vertical frames face the push-out components 310 on the left and right sides respectively.

[0055] Then, the first hydraulic cylinder 332 is activated, which drives the moving frame 333 to move along the slide bar 331. The moving frame 333 drives the four racks 334 to move synchronously. The four racks 334 then drive the four gears 325, the four rotating shafts 321, and the four discs 322 to rotate synchronously. The discs 322 drive the two square tubes 301 to move synchronously in opposite directions through the first pin 323, the third hinge rod 324, and the second pin 304. As the two square tubes 301 gradually approach each other, the multiple outward pushing components 310 on both sides move synchronously towards the vertical frame, so that the insert block 314, the hinge seat 317, and the roller 318 are inserted into the grooves of the corresponding vertical frame, thereby forming an outer pre-positioning of the two vertical frames.

[0056] After the push mechanism 300 completes its outer pre-positioning, the first motor 201 is activated. The first motor 201 drives the lead screw 202 to rotate, which in turn drives the first lead screw nut 203 and multiple second lead screw nuts 206 to move. The first lead screw nut 203 drives two first top blocks 205 to move synchronously in opposite directions along the corresponding first guide rails 102 via two first hinge rods 204. The multiple second lead screw nuts 206 drive multiple second top blocks 208 to move synchronously in opposite directions along the corresponding first guide rails 102 via multiple second hinge rods 207, so that the first top blocks 205 and second top blocks 208 are pressed against the two vertical frames from the inside. At this time, the push mechanism 300 pushes against the vertical frames from the outside, and the inner support mechanism 200 presses against the vertical frames from the inside. The two cooperate with each other to keep the two vertical frames in a stable and fixed state at the welding position.

[0057] After the two vertical frames are fixed, the horizontal frame is placed at the connection position above the two vertical frames, so that both ends of the horizontal frame abut against the upper ends of the corresponding vertical frames. Then, the second hydraulic cylinder 402 is activated, causing the hollow pressure plate 403 to move downward and insert into the groove on the upper part of the horizontal frame. As the hollow pressure plate 403 continues to press down, it can form a clamping effect on the horizontal frame, keeping the horizontal frame tightly connected to the two vertical frames. At the same time, the two first top blocks 205 are located at the internal corners where the horizontal frame connects to the two vertical frames, providing support and fixation at these corner positions, which facilitates subsequent welding of the connection between the horizontal and vertical frames by the welding equipment.

[0058] After the horizontal frame and the two vertical frames are assembled and pressed down by the hollow pressure plate 403, the two first top blocks 205 abut against the connecting inside corners of the horizontal frame and the corresponding vertical frame, thereby providing inner support for the two upper corner connection points. Since the connection between the horizontal frame and the vertical frame tends to shrink towards the inside corner during welding and cooling, the two first top blocks 205 can counteract this shrinkage tendency, which helps to reduce the inward shrinkage of the corners after welding and minimizes the reduction in the net width of the top opening of the door frame.

[0059] Furthermore, the two first top blocks 205 are synchronously driven by the first lead screw nut 203 through the two first hinge rods 204, which can respectively support the connecting corners on the left and right sides of the upper part of the door frame, so that the two connecting corners are constrained at the same time during the welding process. This helps to reduce the tendency of the included angle at the connection between the upper horizontal frame and the two vertical frames to shrink, and reduces the adverse effect of the inconsistent shrinkage of the left and right corners on the squareness of the upper opening of the door frame.

[0060] Meanwhile, the two first top blocks 205 and the push mechanism 300 position the outer side of the groove of the vertical frame, the second top block 208 supports the inner side of the remaining position of the vertical frame, and the hollow pressure plate 403 presses the horizontal frame downwards. This can form a relatively stable clamping constraint relationship in the connection area between the horizontal and vertical frames. This is beneficial to maintain the relative position stability of the horizontal and vertical frames during the welding and cooling stages, thereby reducing the adverse effects of welding thermal deformation on the net width of the door frame, the corner angle, and the overall size consistency.

[0061] During welding, the exhaust fan 408 is activated. The welding fumes are drawn into the hollow pressure plate 403 through two suction slots 404, and then enter the filter 406 via the vertical pipe 405 and the insertion pipe 407. The filter 406 filters the fumes before they are discharged by the exhaust fan 408, thus achieving simultaneous extraction and removal of welding fumes. Because the hollow pressure plate 403 forms a suction channel while pressing the horizontal frame, welding fume treatment can be completed without affecting the pressing state of the horizontal frame.

[0062] After the welding of one side of the horizontal and vertical frame joints is completed, the second motor 502 is started. The second motor 502 drives the vertical plate 101 to rotate relative to the tray 501, so that the back of the vertical plate 101 faces the welding equipment. During the rotation, the ends of the two support rods 106 slide along the annular groove 503 to provide auxiliary support for the vertical plate 101. After the vertical plate 101 rotates to the corresponding position, the welding equipment can continue to weld the other side of the horizontal and vertical frame joints through the two welding grooves 105 on the vertical plate 101, thereby completing the welding process of the weld seams on both sides of the door frame.

[0063] After welding is completed, the second hydraulic cylinder 402 is controlled to retract, causing the hollow pressure plate 403 to rise and disengage from the horizontal frame groove; then the first motor 201 is controlled to run in reverse, causing the first top block 205 and the second top block 208 to move in opposite directions, releasing the clamping force on the inner sides of the two vertical frames; then the first hydraulic cylinder 332 is controlled to move, causing the two square tubes 301 to move away from each other, and the multiple outward pushing components 310 to exit the vertical frame groove, so that the welded fire door frame can be removed from the vertical plate 101.

[0064] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding and positioning fixture for a fire door frame, used for clamping and positioning a fire door frame composed of two vertical frames and one horizontal frame, characterized in that, include: The vertical plate (101) is provided with multiple first guide rails (102), two second guide rails (104), a support plate (103) and two welding grooves (105). An inner support mechanism (200) is provided on the support plate (103) and cooperates with the first guide rail (102). The inner support mechanism (200) has a first top block (205) and a second top block (208) that can respectively abut against the inner side of the two vertical frames. The first top block (205) is used to abut against the inside corner of the connection between the horizontal frame and the vertical frame. An outward push mechanism (300) is provided on both sides of the vertical plate (101) and cooperates with the second guide rail (104). The outward push mechanism (300) has an outward push component (310) that can cooperate with the groove of the vertical frame. A dust removal mechanism (400) is provided on the top of the vertical plate (101), and the dust removal mechanism (400) has a hollow pressure plate (403) that can be inserted into the upper groove of the horizontal frame. The tray (501) has a second motor (502) mounted on its top surface, and the power output shaft of the second motor (502) is fixedly connected to the center of the bottom surface of the vertical plate (101); The inner support mechanism (200) and the outer push mechanism (300) work together to clamp and fix the two vertical frames, the dust removal mechanism (400) presses down on the horizontal frame, and the vertical plate (101) can rotate relative to the tray (501) to weld the other side of the connection between the horizontal frame and the vertical frame through the welding groove (105).

2. The fire door frame welding positioning fixture according to claim 1, characterized in that, The internal support mechanism (200) includes: The first motor (201) is mounted on the top surface of the tray (103), and a lead screw (202) is mounted on its power output shaft. The first lead screw nut (203) is installed on the lead screw (202), and two first hinge rods (204) are hinged thereon. Two first top blocks (205) are respectively hinged to two first hinge rods (204); Multiple second lead screw nuts (206) are mounted on the lead screw (202), and each second lead screw nut (206) is hinged with two second hinge rods (207). Multiple second top blocks (208) are respectively hinged to multiple second hinge rods (207). The first top block (205) and the second top block (208) are each provided with a first sliding groove (209). The first top block (205) and the second top block (208) are respectively slidably connected to the corresponding first guide rail (102) through the first sliding groove (209).

3. The fire door frame welding positioning fixture according to claim 1, characterized in that, The extrapolation mechanism (300) includes: Two square tubes (301) are provided, and each square tube (301) has a second sliding groove (303) at its bottom, and is slidably connected to the corresponding second guide rail (104) through the second sliding groove (303); two second pins (304) are installed on the opposite sides of the two square tubes (301). Multiple push-out components (310) are respectively mounted on the two square tubes (301); An adjustment component (320) is connected to the two square tubes (301) for adjusting the distance between the two square tubes (301); A drive component (330) is connected to the adjustment component (320) and is used to drive the adjustment component (320) to operate; The square tube (301) has a strip groove (302) and the installation position of the multiple push-out components (310) can be adjusted along the strip groove (302).

4. A fire door frame welding positioning fixture according to claim 3, characterized in that, The extrapolation component (310) includes: The hollow base (311) is slidably connected to the square tube (301) via a slider (312); Bolt (313) is installed on the slider (312), passes through the strip groove (302) and is slidably connected to the strip groove (302), and is threadedly engaged with a nut located outside the square tube (301); Mounting plate (315) is slidably connected inside the hollow seat (311); Multiple first springs (316) are installed between the mounting plate (315) and the hollow seat (311); Insert (314) is installed on the side of the mounting plate (315) away from the first spring (316), extends to the outside of the hollow seat (311) and is slidably connected to the hollow seat (311); The insert (314) can elastically extend and retract relative to the hollow seat (311) under the action of the first spring (316).

5. A fire door frame welding positioning fixture according to claim 4, characterized in that, The extrapolation component (310) further includes: Two hinge seats (317) are hinged to the side of the hollow seat (311) away from the slider (312), and rollers (318) are rotatably connected to the hinge seats (317). Multiple second springs (319) are mounted on the hinge seat (317), and their other ends are fixedly connected to the hollow seat (311).

6. A fire door frame welding positioning fixture according to claim 3, characterized in that, The adjustment component (320) includes: Four rotating shafts (321) pass through the vertical plate (101) and are rotatably connected to the vertical plate (101). The two ends of the rotating shafts (321) are respectively connected to a disc (322) and a gear (325). Four first pins (323) are respectively mounted on the four disks (322); Four third hinge rods (324) are used to connect the first pin (323) and the second pin (304).

7. A fire door frame welding positioning fixture according to claim 6, characterized in that, The drive component (330) includes: Both sliding rods (331) are fixedly connected to the vertical plate (101); The first hydraulic cylinder (332) is mounted on the vertical plate (101); The movable frame (333) is mounted on the extension end of the first hydraulic cylinder (332) and is slidably connected to the two slide rods (331); Four racks (334) are respectively connected to the two sides of the movable frame (333) and mesh with the four gears (325) to drive the two square tubes (301) to move synchronously in opposite directions or synchronously in opposite directions.

8. A fire door frame welding positioning fixture according to claim 1, characterized in that, The dust removal mechanism (400) includes: A horizontal plate (401) is installed on the top of the vertical plate (101), and a filter (406) and an air extractor (408) are installed on its top surface. The air extraction pipe of the air extractor (408) is connected to the filter (406). The second hydraulic cylinder (402) is installed on the bottom surface of the horizontal plate (401), and the hollow pressure plate (403) is installed on the extension end of the second hydraulic cylinder (402); The insertion tube (407) is installed on the bottom surface of the filter (406), communicates with the interior of the filter (406), and extends to the bottom of the cross plate (401).

9. A fire door frame welding positioning fixture according to claim 8, characterized in that, The hollow pressure plate (403) includes: The horizontal part has a vertical tube (405) installed at its top, and the vertical tube (405) is slidably inserted into the insertion tube (407); Two inclined portions are connected to the two sides of the horizontal portion, and a dust suction groove (404) is provided on the inclined portions.

10. A welding positioning fixture for a fire door frame according to claim 1, characterized in that, The side of the tray (501) is provided with an annular groove (503), and the bottom surface of the vertical plate (101) is equipped with two support rods (106), the other ends of the two support rods (106) are slidably connected to the annular groove (503). The two welding grooves (105) correspond to the connection points between the two ends of the horizontal frame and the two vertical frames, respectively.

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