Punching device for processing fireproof air duct

Abstract

The application relates to the field of air pipe punching technology, and discloses a punching device for processing fireproof air pipes, which comprises a control console, a processing table and an air pipe. The processing table is fixedly connected to the top inner wall of the control console. The air pipe is arranged on the top of the processing table. The top of the processing table is provided with a punching mechanism. The flexible punching upper die is formed by a reversible punching plate one and a limiting plate. The punching device breaks through the limitation of traditional punching equipment which can only process flat flanges and can directly punch the end flange of a formed rectangular fireproof air pipe. When the lifting device drives the rectangular groove plate to feed downward, the punching plate one automatically turns outward after contacting the bottom of the air pipe. The limiting plate limits the punching plate one to keep the horizontal punching station, so that the interference and shielding of the upper pipe wall of the air pipe to the punching assembly are eliminated. When continuously pressing downward, the air pipe drives the punching plate two to move downward along the slide rod and stretch the reset spring one. The bottom fixed punching plate passes through the guide hole and cooperates with the punching one to complete one-time punching.

Description

Technical Field

[0001] This invention relates to the field of duct punching technology, specifically a punching device for processing fireproof ducts. Background Technology

[0002] Duct punching is a cold stamping process that uses the punch and die of a stamping machine to apply instantaneous shearing force to the ventilation duct sheet or the flange sheet at the end of the duct, causing the material to separate and fall off in sections, forming a through-type regular hole in the workpiece. It belongs to the sheet metal punching process.

[0003] Problems with existing technology: 1. Traditional punching equipment has a fixed straight plate structure, which can only punch individually cut flat flanges and cannot directly fit into the formed rectangular fireproof air duct to complete the processing. If the flange at the end of the bent air duct is punched, the upper wall of the air duct will directly block the downward pressing path of the upper die, resulting in structural interference. The industry's conventional approach is to first separate the flange and the pipe body and punch them separately, and then weld and assemble the air duct after punching. The process is cumbersome, and multiple transfers and welding operations greatly extend the processing cycle, limiting the production capacity of prefabricated fireproof air ducts. 2. Traditional devices rely solely on the tabletop to support the bottom of the duct, lacking internal support and correction structures. During stamping, the duct sidewalls are suspended in mid-air. Under the instantaneous impact of stamping, the duct is prone to slippage, sidewall warping, and hole misalignment. Fireproof ducts are divided into two categories: metal fire-resistant ducts and inorganic composite fire-resistant ducts. The material structure is special: metal sheets are prone to producing a large number of metal burrs after stamping, and the glass magnesium and rock wool composite core materials will generate flocculent fireproof fiber burrs when stretched and torn, resulting in poor hole forming quality. At the same time, the suspended force will cause the composite material to separate between layers, chip at the hole edges, and large-area peeling of the surface fire-resistant coating. The fire resistance integrity at the holes is damaged, and the finished product is difficult to pass the fire protection acceptance standards.

[0004] To address this, a punching device for processing fireproof air ducts is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a punching device for processing fireproof air ducts, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a punching device for processing fireproof air ducts, comprising a control panel, a processing table and an air duct, wherein the processing table is fixedly connected to the inner wall of the top of the control panel, the air duct is disposed on the top of the processing table, a punching mechanism is disposed on the top of the processing table, and a straightening and reinforcing mechanism is disposed inside the punching mechanism. The punching mechanism includes a sliding rod, a return spring, a stamping plate, a mounting rod, and a punching plate. The sliding rod is symmetrically slidably connected to the inner wall of the processing table. The return spring is sleeved on the outer wall of the bottom end of the sliding rod. The stamping plate is fixedly connected between the top ends of the two sliding rods. The mounting rod is fixedly connected to the inner wall of the middle part of the processing table. The punching plate is fixedly connected to the top end of the mounting rod. The correction and reinforcement mechanism includes a fixed rod, a first sliding groove, a second abutting rod, a cross-shaped sliding plate, a guide rod, and a second return spring. The fixed rod is fixedly connected to the upper surface of the perforated plate. The first sliding groove is formed on the inner wall of the middle part of the fixed rod. The second abutting rod is slidably connected to the inner wall of the top of the fixed rod. The cross-shaped sliding plate is slidably connected to the inner wall of the first sliding groove. The guide rod is fixedly connected to the bottom of the first sliding groove. The second return spring is sleeved on the outer wall of the guide rod.

[0007] Preferably, the punching mechanism further includes a lifting device fixedly connected to the outer wall of the processing table, a mounting platform fixedly connected to the top of the lifting device, a connecting rod symmetrically fixedly connected to the lower surface of the mounting platform, a rectangular slot plate fixedly connected to the bottom end of the connecting rod, a limiting plate symmetrically fixedly connected to the inner wall of the bottom end of the rectangular slot plate, a connecting plate symmetrically fixedly connected to the outer wall of the bottom end of the rectangular slot plate, a first stamping plate rotatably connected to the inner wall of the connecting plate, a first torsion spring symmetrically sleeved on the outer walls of both sides of the top end of the first stamping plate, a first punch hole arranged in a linear array on the outer wall of the first stamping plate, and a guide hole arranged in a ring array penetrating the inner wall of the second stamping plate.

[0008] Preferably, the correction and reinforcement mechanism further includes an abutment rod 1 fixedly connected to the middle of the lower surface of the mounting platform, a sleeve plate slidably connected to the outer wall of the abutment rod 1, a buffer spring fixedly connected to the upper surface of the sleeve plate, a groove 2 opened on the inner wall of the bottom end of the abutment rod 2, a cross-shaped fixing plate fixedly connected to the outer wall of the top of the fixing rod, a connecting block fixedly connected to the lower surface of the cross-shaped fixing plate away from the fixing rod, a hinge plate 1 rotatably connected to the inner wall of the connecting block near the abutment rod 2, a groove 3 opened at the top of the hinge plate 1, a hinge plate 2 rotatably connected to the inner wall of the connecting block away from the abutment rod 2, a T-shaped plate rotatably connected between the bottom end of the hinge plate 2 and the hinge plate 1, a shaft symmetrically rotatably connected to the inner walls of both ends of the T-shaped plate away from the connecting block, a torsion spring 2 symmetrically sleeved on the outer wall of the shaft near the connecting block, and a roller rotatably connected to the outer wall of the shaft away from the torsion spring 2.

[0009] Preferably, an electrical connection is established between the lifting device and the control panel, the perforated plate is slidably connected to the inner wall of the second stamping plate, and the second stamping plate is slidably connected to the inner wall of the processing table; The perforated plate is fixed on the mounting rod, and the second stamping plate can slide up and down along the outer wall of the perforated plate, forming a punching die structure; The stamping plate is integrally slidably assembled inside the processing table. When pressed down, it moves down synchronously to ensure that the punching plate stably passes through the guide hole to complete the stamping. The sliding fit structure realizes the punching action without jamming.

[0010] Preferably, the two ends of the first return spring are fixedly connected to the slide rod and the processing table respectively, and the two ends of the first torsion spring are fixedly connected to the first stamping plate and the connecting plate respectively; The return spring locks the slide rod to the processing table at both ends. When the stamping is pressed down, the slide rod pulls down to stretch the spring. After the punching is completed, the spring force automatically pulls the stamping plate back to its original position, without the need for manual lifting. The two ends of the torsion spring are fixed to the connecting plate and the stamping plate. After the stamping plate is pressed and flipped outward, the pressure is released after the punching is completed. The torque of the torsion spring can automatically rotate and retract the stamping plate, which facilitates the loading and unloading of the air duct.

[0011] Preferably, the lower surface of the limiting plate and the lower surface of the rectangular groove plate are on the same horizontal plane, and the guide hole and the punch hole correspond one-to-one; The limiting plate is flush with the bottom surface of the rectangular groove plate. After the stamping plate is flipped to the horizontal, it fits the bottom surface of the limiting plate, which restricts the stamping plate from continuing to deflect outward, ensuring that the stamping plate surface is flat, the punching force is even, and avoiding the hole from being crooked. The guide holes on the second stamping plate correspond one-to-one with the punch holes on the first stamping plate. When the punching plate is pressed down, it can vertically penetrate through the two layers of holes, ensuring that the punched through holes are regular and without deviation, and that the hole walls are smooth and reduce burrs.

[0012] Preferably, the top end of the buffer spring is fixedly connected to the lower surface of the mounting platform, and the second abutment rod is fixedly connected to the cross slide plate; The upper end of the buffer spring is fixed to the mounting platform, and the lower end is connected to the sleeve plate. During the downward pressing process, the top of the air duct lifts the sleeve plate, and the compression of the buffer spring provides elastic clamping force, flexibly pressing the top surface of the air duct to prevent the air duct from being squeezed and deformed and the fireproof coating from being scratched. The second contact rod is rigidly connected to the cross slide plate. When the second contact rod is pressed down, the cross slide plate can be moved down synchronously, ensuring that the correction mechanism is synchronized and the transmission is backlash-free.

[0013] Preferably, the first abutment rod and the second abutment rod are on the same vertical line, and the two ends of the guide rod are fixedly connected to the fixed rod and the cross slide plate, respectively; The first and second contact rods are arranged coaxially and vertically, so that the downward pressure force is transmitted vertically and will not produce horizontal sway, thus avoiding the force-induced skewness and jamming of the correction mechanism. The bottom of the fixed rod and the cross slide are fixed at the upper and lower ends of the guide rod, respectively, to provide linear guidance for the vertical sliding of the cross slide and to constrain the cross slide to move only in the vertical direction, so as to ensure that the correction and opening actions are synchronous and symmetrical.

[0014] Preferably, the top end of the guide rod is slidably connected to the inside of the cross slide plate and the second slide groove, and the top end of the side of the cross slide plate is slidably connected to the inside of the third slide groove; The top of the guide rod passes through the cross slide plate and extends into the second groove at the bottom of the second contact rod, extending the guide stroke. The cross slide plate slides stably along the guide rod throughout the entire stroke, preventing deviation and jamming. The protrusion on the side of the cross slide plate extends into the groove three of the hinge plate one. When the cross slide plate moves down, it squeezes the inner wall of the groove three, driving the hinge plate one to flip downward, converting the vertical downward pressing force into the lateral opening and correction force, so as to realize the automatic centering of the inner wall of the air duct.

[0015] Preferably, the two ends of the second torsion spring are fixedly connected to the T-shaped plate and the shaft respectively, and the roller is made of rubber; The two ends of the torsion spring lock the T-shaped plate and the shaft. When the T-shaped plate is pushed outward, the torsion spring stores force and continuously provides the shaft and roller with an inward pressing force. The punching process fits the inner wall of the air duct throughout, restricting the air duct from sliding. After processing, the torsion spring rebounds and the roller automatically retracts, making it easy to remove the air duct. The rollers are made of rubber, which will not scratch or peel off the fire-resistant coating on the duct surface when they come into contact with the inner wall of the fireproof duct. At the same time, they increase the friction of the contact surface, improve the positioning and correction effect of the duct, and prevent the duct wall from slipping during punching.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. A flexible stamping upper die is formed by a flip-up stamping plate and a limiting plate, breaking through the limitation of traditional punching equipment that can only process flat flanges. It can directly punch the end flanges of formed rectangular fireproof air ducts. When the lifting device drives the rectangular slot plate to feed downward, the stamping plate automatically flips outward after contacting the bottom of the air duct. The limiting plate limits the stamping plate to keep it in a horizontal stamping position, eliminating the interference and obstruction of the upper pipe wall of the air duct to the stamping components. When the pressure continues to drop, the air duct drives the stamping plate to move down along the slide bar and stretch the return spring. The bottom fixed punching plate passes through the guide hole and cooperates with the punching plate to complete the one-time punching. After processing, the torsion spring can automatically drive the stamping plate to rotate and return to its original position, which is convenient for quick handling of the air duct. This structure eliminates the need to remove the air duct flange from the pipe body for separate punching, simplifies the processing process, and greatly improves the processing continuity and overall production efficiency of fireproof air duct flange punching, which is suitable for the processing needs of batch prefabricated fireproof air ducts. 2. During the initial pressing stage via the lifting device, the first contact rod presses against the second contact rod, causing the cross slide plate to move down along the guide rod and compress the second return spring. The cross slide plate then presses against the first hinge plate, which in turn opens the T-shaped plate, allowing the four sets of rubber rollers to simultaneously adhere to the inner wall of the duct and complete automatic centering and correction. During the punching pressing stage, the buffer spring and the sleeve plate press against the top surface of the duct, and the second torsion spring continuously provides elastic clamping force to the rollers, providing internal support and restraint to the side wall of the duct, preventing the sheet metal from warping or sliding during punching. On the one hand, this ensures that the punched plate and the bottom of the duct are perpendicularly aligned, reducing the metal flash and fireproof fiber burrs caused by die gap offset. On the other hand, it evenly disperses the instantaneous punching impact force, preventing problems such as interlayer separation, hole edge chipping, and fireproof coating peeling from the inorganic composite fireproof duct. The rubber roller material will not scratch the fireproof protective layer on the duct surface, steadily improving the quality of the punched finished product and ensuring that the subsequent assembly accuracy and fire resistance performance of the fireproof duct meet fire protection standards. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the positional relationship between the air duct and the stamping plate of the present invention; Figure 3 This is a schematic diagram showing the positional relationship between the mounting platform and the sliding rod of the present invention; Figure 4 This is a schematic diagram showing the positional relationship between the buffer spring and the stamping plate of the present invention; Figure 5 This is a schematic diagram showing the positional relationship between the rectangular groove plate and the punch hole of the present invention; Figure 6 This is a schematic diagram showing the positional relationship between the connecting plate and the torsion spring of the present invention; Figure 7 This is a schematic diagram showing the positional relationship between the fixing rod and the T-shaped plate of the present invention; Figure 8 This is a schematic diagram showing the positional relationship between the second contact rod and the cross-shaped fixing plate of the present invention; Figure 9 This is a schematic diagram showing the positional relationship between the second slide groove and the second hinge plate of the present invention; Figure 10 This is a schematic diagram showing the positional relationship between the slide groove three and the torsion spring two of the present invention.

[0018] In the picture: 101. Control panel; 102. Processing table; 103. Air duct; 200. Punching mechanism; 201. Lifting device; 202. Mounting platform; 203. Connecting rod; 204. Rectangular slot plate; 205. Limiting plate; 206. Connecting plate; 207. First stamping plate; 208. First torsion spring; 209. First punch; 210. Slide rod; 211. First return spring; 212. Second stamping plate; 213. Mounting rod; 214. Punching plate; 215. Guide hole; 300. Correction and reinforcement mechanism; 301. Abutment rod one; 302. Sleeve plate; 303. Buffer spring; 304. Fixing rod; 305. Slide groove one; 306. Abutment rod two; 307. Cross slide plate; 308. Guide rod; 309. Return spring two; 310. Slide groove two; 311. Cross fixing plate; 312. Connecting block; 313. Hinge plate one; 314. Slide groove three; 315. Hinge plate two; 316. T-shaped plate; 317. Shaft rod; 318. Torsion spring two; 319. Roller. Detailed Implementation

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

[0020] Example 1 Please see Figures 1 to 10 The first embodiment of the present invention provides a punching device for processing fireproof air ducts. The device includes a control panel 101, a processing table 102 and an air duct 103. The processing table 102 is fixedly connected to the inner wall of the top of the control panel 101. The air duct 103 is disposed on the top of the processing table 102. A punching mechanism 200 is disposed on the top of the processing table 102. A straightening and reinforcing mechanism 300 is disposed inside the punching mechanism 200.

[0021] Example 2 Reference Figures 1 to 7 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the punching mechanism 200 includes a slide rod 210, a return spring 211, a stamping plate 212, a mounting rod 213, and a punching plate 214. The slide rod 210 is symmetrically slidably connected to the inner wall of the processing table 102. The return spring 211 is sleeved on the outer wall of the bottom end of the slide rod 210. The stamping plate 212 is fixedly connected between the top ends of the two slide rods 210. The mounting rod 213 is fixedly connected to the inner wall of the middle part of the processing table 102. The punching plate 214 is fixedly connected to the top end of the mounting rod 213.

[0022] Furthermore, the punching mechanism 200 also includes a lifting device 201 fixedly connected to the outer wall of the processing table 102, a mounting platform 202 fixedly connected to the top of the lifting device 201, a connecting rod 203 symmetrically fixedly connected to the lower surface of the mounting platform 202, a rectangular groove plate 204 fixedly connected to the bottom end of the connecting rod 203, a limiting plate 205 symmetrically fixedly connected to the inner wall of the bottom end of the rectangular groove plate 204, a connecting plate 206 symmetrically fixedly connected to the outer wall of the bottom end of the rectangular groove plate 204, a stamping plate 207 rotatably connected to the inner wall of the connecting plate 206, a torsion spring 208 symmetrically sleeved on the outer walls of the top two sides of the stamping plate 207, punch holes 209 arranged in a linear array on the outer wall of the stamping plate 207, and guide holes 215 arranged in a ring array penetrating the inner wall of the stamping plate 212.

[0023] During operation: First, the operator places the duct 103 on top of the second stamping plate 212. Then, the operator drives the lifting end of the lifting device 201 to move downwards via the control panel 101. This causes the lifting device 201 to move the mounting platform 202 downwards simultaneously. The mounting platform 202 then moves the rectangular slot plate 204 downwards simultaneously via the connecting rod 203. The rectangular slot plate 204 then moves the limiting plate 205 and the connecting plate 206 downwards simultaneously. The connecting plate 206 then moves the first stamping plate 207 downwards simultaneously, causing the top of the duct 103 to enter the inner side of the rectangular slot plate 204. As the lifting device 201 continues to move the mounting platform 202 downwards, the bottom end of the first stamping plate 207 abuts against the upper surface of the bottom of the duct 103. Under the action of the bottom end of the duct 103 abutting against the surface, the first stamping plate 207 moves towards the middle of the rectangular slot plate 204. The plate is flipped so that the first stamping plate 207 rotates to a horizontal position, making the first stamping plate 207 fit against the limiting plate 205. At this time, the lifting device 201 continues to drive the first stamping plate 207 to move downward, so that the first stamping plate 207 moves downward against the bottom end of the air duct 103, so that the air duct 103 moves downward against the second stamping plate 212 inside the processing table 102, so that the second stamping plate 212 drives the slide rod 210 to move downward synchronously, so that the slide rod 210 pulls the return spring 211 to extend downward, so that the perforated plate 214 slides from the bottom to the top of the second stamping plate 212, so that the perforated plate 214 touches the bottom of the air duct 103, and moves into the perforated hole 209 opened inside the first stamping plate 207, so that the bottom end of the air duct 103 forms an installation hole under the punching action of the perforated plate 214.

[0024] Since the top and bottom dimensions of the duct 103 are the same, during the traditional unidirectional downward stamping process, the top of the duct 103 would obstruct the upper stamping assembly, preventing it from punching the bottom of the duct 103 first through the top, thus affecting the stamping efficiency of the duct 103. Therefore, by rotating the stamping plate 207 and the connecting plate 206, the stamping plate 207 rotates to a horizontal position under the resistance of the bottom of the duct 103, and punches the bottom of the duct 103 under the resistance and limiting action of the limiting plate 205, thereby avoiding the above-mentioned problems and improving the flexibility of the stamping device.

[0025] A flexible stamping upper die is formed by a flip-up stamping plate 207 and a limiting plate 205, breaking through the limitation of traditional punching equipment that can only process flat flanges. It can directly punch the end flanges of the formed rectangular fireproof duct 103. When the lifting device 201 drives the rectangular slot plate 204 downwards, the stamping plate 207 automatically flips outwards after contacting the bottom of the duct 103. The limiting plate 205 limits the stamping plate 207 to maintain a horizontal stamping position, eliminating interference and obstruction of the upper duct wall of the duct 103 to the stamping components. During continuous downward pressure, the duct 103... 3. The stamping plate 212 moves down along the slide bar 210 to stretch the return spring 211. The bottom fixed punching plate 214 passes through the guide hole 215 and cooperates with the punch 209 to complete the punching in one go. After processing, the torsion spring 208 can automatically drive the stamping plate 207 to rotate and reset, which is convenient for quick removal and placement of the air duct 103. This structure does not require the air duct 103 flange to be removed from the pipe body for separate punching, which simplifies the processing procedure, greatly improves the processing continuity and overall production efficiency of the fireproof air duct 103 flange punching, and is suitable for the processing needs of batch prefabricated fireproof air ducts 103.

[0026] Example 3 Reference Figures 3 to 10 This is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: the correction and reinforcement mechanism 300 includes a fixed rod 304, a first slide groove 305, a second abutment rod 306, a cross slide plate 307, a guide rod 308, and a second return spring 309. The fixed rod 304 is fixedly connected to the upper surface of the perforated plate 214. The first slide groove 305 is formed on the inner wall of the middle part of the fixed rod 304. The second abutment rod 306 is slidably connected to the inner wall of the top end of the fixed rod 304. The cross slide plate 307 is slidably connected to the inner wall of the first slide groove 305. The guide rod 308 is fixedly connected to the bottom of the first slide groove 305. The second return spring 309 is sleeved on the outer wall of the guide rod 308.

[0027] Furthermore, the correction and reinforcement mechanism 300 also includes an abutment rod 301 fixedly connected to the middle of the lower surface of the mounting platform 202, a sleeve plate 302 slidably connected to the outer wall of the abutment rod 301, a buffer spring 303 fixedly connected to the upper surface of the sleeve plate 302, a slide groove 310 formed on the inner wall of the bottom end of the abutment rod 306, a cross-shaped fixing plate 311 fixedly connected to the outer wall of the top of the fixing rod 304, a connecting block 312 fixedly connected to the lower surface of the cross-shaped fixing plate 311 on the side away from the fixing rod 304, and a rotatably connected to the inner wall of the connecting block 312 on the side near the abutment rod 306. The components include a hinge plate 313, a groove 314 at the top of the hinge plate 313, a hinge plate 315 rotatably connected to the inner wall of the connecting block 312 on the side away from the abutting rod 306, a T-shaped plate 316 rotatably connected between the hinge plate 315 and the bottom of the hinge plate 313, a shaft 317 symmetrically rotatably connected to the inner walls of both ends of the T-shaped plate 316 on the side away from the connecting block 312, a torsion spring 318 symmetrically sleeved on the outer wall of the shaft 317 near the connecting block 312, and a roller 319 rotatably connected to the outer wall of the shaft 317 away from the torsion spring 318.

[0028] During use: As the mounting platform 202 moves downward, it causes the first abutment rod 301 and the buffer spring 303 to move downward synchronously. The buffer spring 303 then causes the sleeve plate 302 to move downward synchronously. Before the bottom end of the stamping plate 207 contacts the bottom end of the duct 103, the first abutment rod 301 abuts the second abutment rod 306 downward. Under the action of the first abutment rod 301, the second abutment rod 306 moves downward inside the fixed rod 304. This causes the second abutment rod 306 to move the cross slide plate 307 downward inside the slide groove 305. The cross slide plate 307 slides downward on the outer wall of the guide rod 308 and compresses the second return spring 309 downward. This causes the top end of the guide rod 308 to slide into the cross slide plate 307 and the slide groove 310, causing the cross slide plate 307 to abut the hinge plate 31 downward. The inner wall of the groove 314 at the top of the 3rd section allows the bottom end of the hinge plate 313 to rotate towards the side closer to the shaft 317, causing the top side of the cross slide plate 307 to slide away from the hinge plate 315 inside the groove 314. During the rotation of the hinge plate 313, the T-shaped plate 316 connected to it moves synchronously, causing the bottom end of the hinge plate 315 connected to it to rotate synchronously around the top end of the hinge plate 315. This provides stable support for the T-shaped plate 316 during the rotation process, allowing the T-shaped plate 316 to move synchronously towards the inner wall of the duct 103 along the shaft 317 and the torsion spring 318. This causes the shaft 317 to drive the roller 319 connected to it to abut against the inner wall of the duct 103, thereby causing the duct 103 to be corrected in position under the action of the roller 319.

[0029] As the bottom end of the stamping plate 207 contacts the bottom end of the duct 103 and continues to press down, the first contact rod 301 continues to contact the second contact rod 306 and slides downward inside the fixed rod 304. This causes the second contact rod 306 and the cross-shaped sliding plate 307 to continue sliding downward inside the slide groove 305. When the stamping plate 207 rotates to a horizontal position and is in contact with the lower surface of the limiting plate 205, the top of the duct 103 moves upward against the sleeve plate 302 and moves upward on the outer wall of the first contact rod 301. This causes the sleeve plate 302 to compress the buffer spring 303 and contract. Under the elastic action of the buffer spring 303, the sleeve plate 302 contacts and limits the top of the duct 103. The stamping plate 207 contacts the bottom of the duct 103 and limits the bottom of the duct 103.

[0030] When the stamping plate 207 is attached to the limiting plate 205, and the stamping plate 207 continues to move downward under the action of the mounting platform 202, and the punching plate 214 punches the air duct 103, the second abutment rod 306 continues to move downward under the action of the first abutment rod 301. Under the action of the cross slide plate 307, the hinge plate 313 and the second hinge plate 315, the roller 319 continuously squeezes the inner wall of the air duct 103. The roller 319 starts to rotate under the action of the air duct 103, and the shaft 317 drives the second torsion spring 318 to twist, thereby fixing the position of the air duct 103 during the punching process, thus improving the stability of the air duct 103 during the punching process.

[0031] In the initial pressing stage via the lifting device 201, the first contact rod 301 presses against the second contact rod 306, causing the cross slide plate 307 to move down along the guide rod 308 and compress the second reset spring 309. The cross slide plate 307 presses against the first hinge plate 313 and the second hinge plate 315, opening the T-shaped plate 316, so that the four sets of rubber rollers 319 simultaneously adhere to the inner wall of the air duct 103 to complete automatic centering and correction. During the punching pressing stage, the buffer spring 303 and the sleeve plate 302 press against the top surface of the air duct 103, and the second torsion spring 318 continuously provides elastic pressing force to the rollers 319, internally supporting and constraining the air duct 103. The three side walls prevent the sheet metal from warping or sliding during stamping. On the one hand, they ensure that the perforated plate 214 and the bottom of the duct 103 are perpendicularly aligned, reducing the metal flash and fireproof fiber burrs caused by the mold gap offset. On the other hand, they evenly disperse the instantaneous stamping impact force, preventing problems such as interlayer separation, hole edge chipping, and fireproof coating peeling from the inorganic composite fireproof duct 103. The rubber roller 319 material will not scratch the fireproof protective layer on the surface of the duct 103, thus steadily improving the quality of the stamped finished product and ensuring that the subsequent assembly accuracy and fire resistance performance of the fireproof duct 103 meet the fire protection specifications.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A punching device for processing fireproof air ducts, comprising a control panel (101), a processing table (102), and an air duct (103), wherein the processing table (102) is fixedly connected to the inner wall of the top of the control panel (101), and the air duct (103) is disposed on the top of the processing table (102), characterized in that: The top of the processing table (102) is provided with a punching mechanism (200), and the inside of the punching mechanism (200) is provided with a straightening and reinforcing mechanism (300). The punching mechanism (200) includes a slide rod (210), a return spring (211), a stamping plate (212), a mounting rod (213), and a punching plate (214). The slide rod (210) is symmetrically slidably connected to the inner wall of the processing table (102). The return spring (211) is sleeved on the outer wall of the bottom end of the slide rod (210). The stamping plate (212) is fixedly connected between the top ends of the two slide rods (210). The mounting rod (213) is fixedly connected to the inner wall of the middle part of the processing table (102). The punching plate (214) is fixedly connected to the top end of the mounting rod (213). The correction and reinforcement mechanism (300) includes a fixed rod (304), a first slide groove (305), a second abutment rod (306), a cross slide plate (307), a guide rod (308), and a second return spring (309). The fixed rod (304) is fixedly connected to the upper surface of the perforated plate (214). The first slide groove (305) is opened on the inner wall of the middle part of the fixed rod (304). The second abutment rod (306) is slidably connected to the inner wall of the top end of the fixed rod (304). The cross slide plate (307) is slidably connected to the inner wall of the first slide groove (305). The guide rod (308) is fixedly connected to the bottom of the first slide groove (305). The second return spring (309) is sleeved on the outer wall of the guide rod (308).

2. The punching device for processing fireproof air ducts according to claim 1, characterized in that: The punching mechanism (200) further includes a lifting device (201) fixedly connected to the outer wall of the processing table (102), a mounting platform (202) fixedly connected to the top of the lifting device (201), connecting rods (203) symmetrically fixedly connected to the lower surface of the mounting platform (202), a rectangular groove plate (204) fixedly connected to the bottom end of the connecting rod (203), and a limiting plate (205) symmetrically fixedly connected to the inner wall of the bottom end of the rectangular groove plate (204). The plate is fixedly connected to the outer wall of the bottom end of the rectangular slot plate (204), the first stamping plate (207) is rotatably connected to the inner wall of the connecting plate (206), the first torsion spring (208) is symmetrically sleeved on the outer walls of the top two sides of the first stamping plate (207), the first punch (209) is arranged in a linear array on the outer wall of the first stamping plate (207), and the guide hole (215) is arranged in a ring array and penetrates the inner wall of the second stamping plate (212).

3. The punching device for processing fireproof air ducts according to claim 2, characterized in that: The correction and reinforcement mechanism (300) further includes an abutment rod (301) fixedly connected to the middle of the lower surface of the mounting platform (202), a sleeve plate (302) slidably connected to the outer wall of the abutment rod (301), a buffer spring (303) fixedly connected to the upper surface of the sleeve plate (302), a slide groove (310) opened on the inner wall of the bottom end of the abutment rod (306), a cross fixing plate (311) fixedly connected to the outer wall of the top of the fixing rod (304), a connecting block (312) fixedly connected to the lower surface of the cross fixing plate (311) away from the fixing rod (304), and a hinge rotatably connected to the inner wall of the connecting block (312) near the abutment rod (306). The components include: a plate 1 (313), a groove 3 (314) opened at the top of the hinge plate 1 (313), a hinge plate 2 (315) rotatably connected to the inner wall of the connecting block (312) away from the abutment rod 2 (306), a T-shaped plate (316) rotatably connected between the hinge plate 2 (315) and the bottom end of the hinge plate 1 (313), a shaft (317) symmetrically rotatably connected to the inner walls of both ends of the T-shaped plate (316) away from the connecting block (312), a torsion spring 2 (318) symmetrically sleeved on the outer wall of the shaft (317) near the connecting block (312), and a roller (319) rotatably connected to the outer wall of the shaft (317) away from the torsion spring 2 (318).

4. The punching device for processing fireproof air ducts according to claim 2, characterized in that: An electrical connection is established between the lifting device (201) and the control panel (101). The perforated plate (214) is slidably connected to the inner wall of the second stamping plate (212), and the second stamping plate (212) is slidably connected to the inner wall of the processing table (102).

5. A punching device for processing fireproof air ducts according to claim 2, characterized in that: The two ends of the reset spring (211) are fixedly connected to the slide rod (210) and the processing table (102) respectively, and the two ends of the torsion spring (208) are fixedly connected to the stamping plate (207) and the connecting plate (206) respectively.

6. The punching device for processing fireproof air ducts according to claim 5, characterized in that: The lower surface of the limiting plate (205) and the lower surface of the rectangular groove plate (204) are on the same horizontal plane, and the guide hole (215) corresponds to the punch hole (209) one by one.

7. A punching device for processing fireproof air ducts according to claim 3, characterized in that: The top of the buffer spring (303) is fixedly connected to the lower surface of the mounting platform (202), and the second abutment rod (306) is fixedly connected to the cross slide plate (307).

8. A punching device for processing fireproof air ducts according to claim 7, characterized in that: The first abutment rod (301) and the second abutment rod (306) are on the same vertical line, and the two ends of the guide rod (308) are fixedly connected to the fixed rod (304) and the cross slide plate (307) respectively.

9. A punching device for processing fireproof air ducts according to claim 8, characterized in that: The top end of the guide rod (308) is slidably connected to the inside of the cross slide plate (307) and the second slide groove (310), and the top end of the side of the cross slide plate (307) is slidably connected to the inside of the third slide groove (314).

10. A punching device for processing fireproof air ducts according to claim 9, characterized in that: The two ends of the second torsion spring (318) are fixedly connected to the T-shaped plate (316) and the shaft (317) respectively, and the roller (319) is made of rubber.

Images