Metal skin forming device and process for fire exit door

Abstract

The invention relates to the technical field of cutting, and discloses a metal skin forming device and process for a fire exit door, the metal skin forming device comprises a workbench and a cutting assembly installed on the surface of the workbench, a laser cutting tool bit is installed at the output end of the cutting assembly, and a thin steel sheet is placed on the workbench. Through cooperation of the pressing roller and the adjusting roller, the deformation problem during cutting of the thin steel sheet is reduced, and when the laser cutting tool bit works, the pressing roller and the adjusting roller are pressed on the two sides of the cutting position firstly, so that pre-fixing of the cutting area is achieved; after a gap is generated during cutting, the driving assembly drives the adjusting roller to move downwards to press and shear the waste, so that the workpiece generates uniform shearing force, and precise cutting is completed in cooperation with the laser cutting tool bit; the follow-up adjusting roller and the pressing roller form an up-down opposite pressing structure after horizontally sliding, one end presses the waste, the other end supports the bottom of the workpiece, the cutting size precision and flatness of the fire exit door metal skin are ensured, and the mounting adaptation requirement of the fire exit door skin is met.

Description

Technical Field

[0001] This invention belongs to the field of cutting technology, specifically, it relates to a metal skin forming device and process for fire doors. Background Technology

[0002] As a core protective component for building fire safety, the forming precision of the metal skin (usually made of thin steel sheets) of fire doors directly affects the sealing performance, structural strength, and installation compatibility of fire doors. In particular, the cutting precision and notch forming quality of the metal skin are more stringent in special locations such as the corners and reserved installation holes of fire doors.

[0003] Currently, the cutting and forming of metal skin for fire doors mostly adopts traditional laser cutting equipment. This type of equipment mainly cuts thin steel sheets through laser cutting heads. However, thin steel sheets are thin and have poor rigidity. Moreover, thin steel sheets are mostly unrolled from steel coils and are initially bent, carrying residual stress. During the laser cutting process, thin steel sheets are prone to warping and deformation due to their own bending stress, the heat generated by laser cutting, and the cutting force, resulting in deviations in cutting dimensions. This directly affects the compatibility of the metal skin with the fire door frame and may even cause scrap.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A metal skin forming device for fire doors includes a workbench and a cutting assembly mounted on its surface, wherein a laser cutting head is installed at the output end of the cutting assembly, and a thin steel sheet is placed on the workbench.

[0006] The laser cutting head housing is equipped with a pressing cover, a fixing frame is installed at one end of the pressing cover, a pressing roller is installed at the bottom of the fixing frame, and a sliding frame is vertically inserted at the other end of the pressing cover. An adjusting roller is horizontally slidably installed on the sliding frame, and the adjusting roller and the pressing roller press on both sides of the cutting position respectively. The fixed frame is equipped with a drive assembly, which includes a turntable. A guide block is installed on the outer wall of the turntable. One end of the guide block is provided with a ramp. When the guide block rotates, the ramp drives the sliding frame and the adjusting roller to move down, so that the adjusting roller presses and shears the waste material down, thereby generating shearing force on the workpiece. The turntable is also equipped with a fixing block, and one end of the fixing block has an inclined surface. When the sliding frame moves down, the turntable continues to rotate and drives the adjusting roller to slide horizontally through the inclined surface, so that one end of the adjusting roller presses on the sheared waste and the other end is placed on the bottom of the workpiece and cooperates with the pressing roller to prevent it from deforming.

[0007] In a preferred embodiment of the present invention, the bottom of the workbench is equipped with four support legs, the bottom of the four support legs is equipped with anti-slip pads, and reinforcing ribs are installed between adjacent support legs. The heights of the reinforcing ribs are different. The workbench is also equipped with a controller, which is used to control the operation of the cutting component and the drive component.

[0008] In a preferred embodiment of the present invention, a protective cover is installed on the pressing cover. The top of the protective cover is installed on the outer wall of the laser cutting head. The protective cover is used to cover the cutting position to prevent damage caused by flying cutting sparks. Several pairs of ball bearings are installed at the bottom of the pressing cover and the ball bearings are attached to the thin steel sheet. A connecting rod is installed on the pressing cover and the connecting rod is connected to the outer shell of the laser cutting head.

[0009] In a preferred embodiment of the present invention, a plurality of pairs of partitions are installed on the workbench, the partitions are used to support thin steel sheets, and the partitions have notches at their center positions, the notches corresponding to the cutting positions. A bracket is installed on the outer side wall of the partition, and the bracket is installed on the workbench. Guide rollers are installed at both ends of the bracket, and the guide rollers are placed on the outermost partition wall.

[0010] In a preferred embodiment of the present invention, slide rails are installed at both ends of the workbench, and slide blocks are slidably disposed on the slide rails. The slide blocks are locked to the slide rails by bolts. A pressure plate is disposed on the partition, and the pressure plate is screwed to the slide block by another bolt. The pressure plate is used to lock the thin steel sheet.

[0011] In a preferred embodiment of the present invention, a positioning frame is installed on the sliding frame, and a positioning rod is installed through the positioning frame. The bottom of the positioning rod is installed on the pressing cover, and a positioning plate is installed on the top of the positioning rod. The diameter of the positioning plate is larger than that of the positioning rod to prevent the positioning frame from separating from the positioning rod. A compression spring is sleeved on the positioning rod. One end of the compression spring is engaged with the side wall of the pressing cover, and the other end of the compression spring is engaged with the positioning frame. A synchronization plate is installed on the positioning frame. The compression spring is used to drive the synchronization plate to fit against the bottom of the guide block. The end of the guide block is provided with an inward concave track with a diameter smaller than that of the guide block. The inward concave track is used to drive the adjusting roller located at the bottom of the thin steel sheet to move upward, so that the adjusting roller fits against the thin steel sheet.

[0012] In a preferred embodiment of the present invention, a sliding groove is provided on the sliding frame, a slider is slidably installed inside the sliding groove, a guide rod is installed through the slider, both ends of the guide rod are installed on the side wall of the sliding groove, and tension springs are sleeved on both ends of the guide rod. One end of the tension spring is engaged with the sliding groove, and the other end of the tension spring is engaged with the bottom of the slider. A synchronization frame is installed at the bottom of the slider, and the synchronization frame is rotatably connected to the adjusting roller.

[0013] In a preferred embodiment of the present invention, a connecting frame is installed on the top of the slider, a top rod is installed at the end of the connecting frame, a guide ball is installed at the end of the top rod, and the tension spring is used to drive the guide ball to always be in contact with the fixed block.

[0014] In a preferred embodiment of the present invention, a boss is mounted on the fixed frame, a drive motor is mounted on the boss, a drive shaft is mounted on the output end of the drive motor, the drive shaft is connected to the rotation center of the turntable, a positioning seat is rotatably mounted on the drive shaft, and the positioning seat is mounted on the fixed frame.

[0015] A metal skin forming process for fire doors, comprising the following steps: Step 1: Positioning and fixing the workpiece. Place the thin steel sheet on several pairs of partitions on the worktable. Slide the slide block along the slide rail to the appropriate position according to its size and lock it. Then tighten the pressure plate bolts to lock the thin steel sheet on the partition. The guide roller is attached to its edge to complete the positioning and fixing. Step 2: Equipment parameter debugging. Debug the parameters of the cutting and driving components through the controller, clarify the laser cutting head path, power, and drive motor speed to ensure they are compatible with the forming requirements, and then put the machine into standby mode. Step 3: After the cutting components are in place and the equipment is started, the cutting assembly moves the laser cutting head and the pressing cover connected to the connecting rod to the preset position. Step 4: Laser cutting and shaping. The laser cutting head starts cutting. After a gap appears, the drive motor drives the turntable to rotate through the drive shaft. The guide block ramp pushes the positioning frame, sliding frame and adjusting roller to move down, pressing the waste material to generate shearing force to cooperate with the cutting. The turntable continues to rotate, and the fixed block ramp pushes the slider and adjusting roller to move horizontally, so that they are pressed and fixed against the pressing roller to prevent deformation. Step 5: Reset and remove the workpiece. After cutting, the inner concave track of the guide block rotates to the corresponding position, the compression spring resets and pushes the adjusting roller upward; the fixed block disengages from the guide ball, the tension spring resets and drives the adjusting roller to reset horizontally, and the two rollers disengage from the workpiece; after the cutting assembly is removed, the worker loosens the bolts and removes the forming skin to complete the operation.

[0016] Compared with the prior art, the present invention has the following advantages: This invention reduces deformation during thin steel sheet cutting through the coordinated operation of a pressing roller and an adjusting roller. During laser cutting, the pressing roller and adjusting roller are first pressed against both sides of the cutting position to pre-fix the cutting area. After a slit is created, the drive assembly moves the adjusting roller downwards to press and shear the waste material, generating uniform shearing force on the workpiece and cooperating with the laser cutting head to complete precise cutting. Subsequently, after sliding horizontally, the adjusting roller forms an upper and lower pressure structure with the pressing roller, pressing the waste material at one end and supporting the bottom of the workpiece at the other. This effectively prevents the thin steel sheet from warping or deforming due to heat and stress, ensuring the cutting dimensional accuracy and flatness of the fire door metal skin and meeting the installation and adaptation requirements of the fire door skin.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 A three-dimensional diagram of a metal skin forming device for fire doors; Figure 2 A metal skin forming device for fire doors Figure 1 Enlarged view of point A in the middle; Figure 3 A top view of a metal skin forming device for fire doors; Figure 4 A partial view of a metal skin forming device for fire doors Figure 1 ; Figure 5 A bottom view of the press cover of a metal skin forming device for a fire door; Figure 6 A partial view of a metal skin forming device for fire doors Figure 2 ; Figure 7 A partial view of a metal skin forming device for fire doors Figure 3 ; Figure 8 A metal skin forming device for fire doors Figure 7 Enlarged view at point B in the middle; Figure 9 A partial view of a metal skin forming device for fire doors Figure 4 .

[0019] In the picture: 1. Workbench; 11. Support leg; 111. Reinforcing rib; 12. Controller; 13. Cutting assembly; 131. Laser cutting head; 132. Protective cover; 14. Partition; 141. Bracket; 142. Guide roller; 15. Pressure plate; 151. Slide; 152. Slide rail; 16. Thin steel sheet; 2. Pressing cover; 21. Connecting rod; 211. Ball bearing; 22. Fixing frame; 221. Pressing roller; 23. Sliding frame; 231. Adjusting roller; 232. Synchronizing frame; 233. Slider; 234. Slide groove; 235. Guide rod; 236. Tension spring; 24. Positioning frame; 241. Positioning rod; 242. Positioning plate; 243. Compression spring; 25. Turntable; 251. Drive motor; 252. Drive shaft; 253. Positioning seat; 254. Boss; 26. Guide block; 261. Ramp; 262. Concave track; 263. Synchronizing plate; 27. Fixing block; 271. Inclined surface; 28. Connecting frame; 281. Top rod; 282. Guide ball. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] like Figures 1 to 9 As shown, a metal skin forming device for fire doors includes a workbench 1 and a cutting assembly 13 mounted on its surface. The output end of the cutting assembly 13 is equipped with a laser cutting head 131, and a thin steel sheet 16 is placed on the workbench 1.

[0022] The laser cutting head 131 has a pressing cover 2 installed on its outer shell. A fixing frame 22 is installed at one end of the pressing cover 2, and a pressing roller 221 is installed at the bottom of the fixing frame 22. A sliding frame 23 is vertically inserted and installed at the other end of the pressing cover 2, and an adjusting roller 231 is horizontally slidably installed on the sliding frame 23. The adjusting roller 231 and the pressing roller 221 press against both sides of the cutting position, respectively. A driving assembly is installed on the fixing frame 22. The driving assembly includes a turntable 25. A guide block 26 is installed on the outer wall of the turntable 25. A ramp 261 is opened at one end of the guide block 26. When the guide block 26 rotates, it passes through the ramp 261. The slope 261 drives the sliding frame 23 and the adjusting roller 231 to move downward, causing the adjusting roller 231 to press and shear the waste material downward, thus generating shearing force on the workpiece. The pressing roller 221 and the adjusting roller 231 can press and limit the cutting position on both sides. The slope 261 of the guide block 26 can drive the sliding frame 23 and the adjusting roller 231 to move downward, generating shearing force on the workpiece by pressing and shearing the waste material. This, together with the laser cutting head 131, improves the cutting efficiency. At the same time, the pressing cover 2 can protect the surrounding structure of the laser cutting head 131. The fixing frame 22 provides a stable installation base for the pressing roller 221.

[0023] A fixing block 27 is also installed on the turntable 25, and one end of the fixing block 27 has an inclined surface 271. When the sliding frame 23 moves down, the turntable 25 continues to rotate, driving the adjusting roller 231 to slide horizontally through the inclined surface 271. This causes one end of the adjusting roller 231 to press on the sheared waste, and the other end to be placed at the bottom of the workpiece, cooperating with the pressing roller 221 to prevent deformation. The inclined surface 271 of the fixing block 27 can precisely drive the adjusting roller 231 to slide horizontally, so that the adjusting roller 231 and the pressing roller 221 cooperate, which can both press the sheared waste and prevent the workpiece from deforming during the cutting process, ensuring the forming accuracy of the fire door metal skin. The turntable 25 provides a stable installation and rotation base for the fixing block 27.

[0024] like Figures 1 to 9 As shown in the specific embodiment, the workbench 1 has four support legs 11 installed at its bottom, with anti-slip pads on the bottom of each support leg 11. Reinforcing ribs 111 are installed between adjacent support legs 11, and the heights of the reinforcing ribs 111 are different. A controller 12 is also installed on the workbench 1, which controls the operation of the cutting assembly 13 and the drive assembly. The four support legs 11 provide stable support for the workbench 1, the anti-slip pads prevent slippage during operation, and the reinforcing ribs 111 of different heights further enhance the structural stability of the support legs 11, preventing the workbench 1 from shaking and affecting cutting accuracy. The controller 12 enables precise control of the cutting assembly 13 and the drive assembly, improving the ease of operation and operational stability of the equipment.

[0025] like Figures 1 to 9 As shown, a protective cover 132 is further installed on the pressing cover 2. The top of the protective cover 132 is installed on the outer wall of the laser cutting head 131. The protective cover 132 is used to cover the cutting position to prevent damage caused by flying cutting sparks. Several pairs of ball bearings 211 are installed at the bottom of the pressing cover 2, and the ball bearings 211 are attached to the thin steel sheet 16. A connecting rod 21 is installed on the pressing cover 2, and the connecting rod 21 is connected to the outer shell of the laser cutting head 131. The protective cover 132 can cover the cutting position of the laser cutting head 131, effectively preventing equipment damage or personnel injury caused by flying cutting sparks. The ball bearings 211 can make the pressing cover 2 move more smoothly with the laser cutting head 131, while ensuring the fit between the pressing cover 2 and the thin steel sheet 16. The connecting rod 21 can realize the synchronous connection between the pressing cover 2 and the laser cutting head 131, ensuring the synchronous movement of the two.

[0026] like Figures 1 to 9As shown, furthermore, several pairs of partitions 14 are installed on the worktable 1. The partitions 14 are used to support the thin steel sheet 16. The partitions 14 have notches at their centers, and the notches correspond to the cutting positions. A bracket 141 is installed on the outer wall of the partition 14, and the bracket 141 is installed on the worktable 1. Guide rollers 142 are installed at both ends of the bracket 141, and the guide rollers 142 are placed on the outermost partition 14. The partitions 14 can provide stable support for the thin steel sheet 16. The notches at the centers correspond to the cutting positions, preventing the partitions 14 from interfering with the cutting operation of the laser cutting head 131. The brackets 141 can provide a stable mounting base for the partitions 14 and the guide rollers 142. The guide rollers 142 can guide and provide auxiliary support for the edges of the thin steel sheet 16, ensuring the flatness of the thin steel sheet 16.

[0027] like Figures 1 to 9 As shown, furthermore, slide rails 152 are installed at both ends of the worktable 1, and slide blocks 151 are slidably mounted on the slide rails 152. The slide blocks 151 and the slide rails 152 are locked together by bolts. A pressure plate 15 is provided on the partition 14, and the pressure plate 15 is screwed onto the slide block 151 by another bolt. The pressure plate 15 is used to lock the thin steel sheet 16. The cooperation between the slide rails 152 and the slide blocks 151 allows for the adjustment of the position of the pressure plate 15 to accommodate thin steel sheets 16 of different sizes. The bolt locking method ensures the stability of the slide blocks 151 and the pressure plate 15. The pressure plate 15 can firmly lock the thin steel sheet 16 onto the partition 14 to prevent displacement of the thin steel sheet 16 during cutting, further improving the cutting accuracy. The worktable 1 provides a stable mounting carrier for the slide rails 152.

[0028] Example 2: The difference between the above embodiments and this embodiment is that: Figures 1 to 9As shown, a positioning frame 24 is installed on the sliding frame 23, and a positioning rod 241 is installed through the positioning frame 24. The bottom of the positioning rod 241 is installed on the pressing cover 2, and a positioning plate 242 is installed on the top of the positioning rod 241. The diameter of the positioning plate 242 is larger than that of the positioning rod 241 to prevent the positioning frame 24 from separating from the positioning rod 241. A compression spring 243 is sleeved on the positioning rod 241. One end of the compression spring 243 is engaged with the side wall of the pressing cover 2, and the other end is engaged with the positioning frame 24. A synchronization plate 263 is installed on the positioning frame 24. The compression spring 243 is used to drive the synchronization plate 263 to fit with the bottom of the guide block 26. The end of the guide block 26 is provided with an inward concave track 262 with a diameter smaller than that of the guide block 26. The inward concave track 262 is used to drive the adjusting roller 231 located at the bottom of the thin steel sheet 16 to move upward, so that the adjusting roller 231 and the thin steel sheet 16 fit together. The positioning rod 241 guides the up-and-down movement of the positioning frame 24. The positioning plate 242 effectively prevents the positioning frame 24 from separating from the positioning rod 241, ensuring structural integrity. The compression spring 243 drives the synchronous plate 263 to fit against the bottom of the guide block 26, ensuring that the guide block 26 can accurately drive the positioning frame 24 and the sliding frame 23 to move when rotating. The concave track 262 drives the adjusting roller 231 to move upward and fit against the thin steel sheet 16, preventing the adjusting roller 231 from scraping the workpiece when resetting. The positioning frame 24 provides a stable mounting base for the synchronous plate 263.

[0029] like Figures 1 to 9 As shown, in a specific embodiment, a sliding frame 23 has a sliding groove 234, and a slider 233 is slidably installed inside the sliding groove 234. A guide rod 235 is installed through the slider 233. Both ends of the guide rod 235 are installed on the side wall of the sliding groove 234. Tension springs 236 are sleeved at both ends of the guide rod 235. One end of the tension spring 236 is engaged with the sliding groove 234, and the other end of the tension spring 236 is engaged with the bottom of the slider 233. A synchronization frame 232 is installed at the bottom of the slider 233, and the synchronization frame 232 is rotatably connected to the adjusting roller 231. A connecting frame 28 is installed at the top of the slider 233. A top rod 281 is installed at the end of the connecting frame 28, and a guide ball 282 is installed at the end of the top rod 281. The tension spring 236 is used to drive the guide ball 282 to always be in contact with the fixed block 27. The slide groove 234 and guide rod 235 can guide and limit the horizontal sliding of the slider 233. The tension spring 236 can drive the guide ball 282 to always be in contact with the fixed block 27, ensuring that the slider 233 can be accurately driven to move when the fixed block 27 rotates. The synchronous frame 232 can realize the synchronous linkage between the slider 233 and the adjusting roller 231. The connecting frame 28 and the top rod 281 can transmit the force of the fixed block 27. The guide ball 282 can reduce the friction between the top rod 281 and the fixed block 27, and improve the smoothness and accuracy of the horizontal movement of the adjusting roller 231. The sliding frame 23 provides a stable installation foundation for the slide groove 234 and other structures.

[0030] like Figures 1 to 9 As shown, further, a boss 254 is mounted on the fixed frame 22, a drive motor 251 is mounted on the boss 254, and a drive shaft 252 is mounted on the output end of the drive motor 251. The drive shaft 252 is connected to the rotation center of the turntable 25, and a positioning seat 253 is rotatably mounted on the drive shaft 252. The positioning seat 253 is mounted on the fixed frame 22. The boss 254 provides a stable mounting platform for the drive motor 251, and the drive motor 251 can provide stable rotational power to the turntable 25 through the drive shaft 252, ensuring that the turntable 25 drives the guide block 26 and the fixed block 27 to rotate accurately. The positioning seat 253 can support and position the drive shaft 252, preventing the drive shaft 252 from shaking during rotation and ensuring the operational stability of the drive assembly. The fixed frame 22 provides a stable mounting foundation for the boss 254 and the positioning seat 253.

[0031] This invention also discloses a metal skin forming process for fire doors, the steps of which are as follows: Step 1: Positioning and fixing the workpiece. Place the thin steel sheet 16 on several pairs of partitions 14 on the worktable 1. According to its size, slide the slide block 151 along the slide rail 152 to the appropriate position and lock it. Then tighten the bolts of the pressure plate 15 to lock the thin steel sheet 16 on the partition 14. The guide roller 142 fits against its edge to complete the positioning and fixing. Step 2: Equipment parameter debugging. Debug the parameters of the cutting component 13 and the drive component through the controller 12, clarify the path, power and speed of the laser cutting head 131 and the drive motor 251, and ensure that they are adapted to the forming requirements. After debugging, standby mode is activated. Step 3: After the cutting components are in place and the equipment is started, the cutting assembly 13 moves the laser cutting head 131 and the pressing cover 2 connected to the connecting rod 21 to the preset position. Step 4: Laser cutting and shaping. The laser cutting head 131 starts cutting. After a gap appears, the drive motor 251 drives the turntable 25 to rotate through the drive shaft 252. The guide block 26 and the ramp 261 push the positioning frame 24, the sliding frame 23 and the adjusting roller 231 to move downward, pressing the waste material to generate shearing force to cooperate with the cutting. The turntable 25 continues to rotate, and the inclined surface 271 of the fixing block 27 pushes the slider 233 and the adjusting roller 231 to move horizontally, so that they are pressed and fixed against the pressing roller 221 to prevent deformation. Step 5: Reset and remove the workpiece. After the cutting is completed, the inner concave track 262 of the guide block 26 rotates to the corresponding position, the compression spring 243 resets and pushes the adjusting roller 231 to move upward; the fixed block 27 disengages from the guide ball 282, the tension spring 236 resets and drives the adjusting roller 231 to reset horizontally, and the two rollers disengage from the workpiece; after the cutting assembly 13 is removed, the worker loosens the bolts and removes the forming skin to complete the operation.

[0032] The implementation principle of the metal skin forming device for fire doors according to the present invention is as follows: First, the thin steel sheet 16 is placed on several pairs of partitions 14 on the surface of the workbench 1. The partitions 14 provide stable support for the thin steel sheet 16. The operator can slide the slide block 151 along the slide rail 152 at both ends of the workbench 1 according to the size of the thin steel sheet 16. After adjusting it to the appropriate position, the slide block 151 is locked to the slide rail 152 with bolts. Then, the bolts between the pressure plate 15 and the slide block 151 are tightened. The pressure plate 15 firmly locks the thin steel sheet 16 onto the partition 14. The guide roller 142 on the outer bracket 141 of the partition 14 guides and provides auxiliary support for the edge of the thin steel sheet 16. At the same time, the operator completes the preliminary operation parameter debugging of the cutting component 13 and the drive component through the controller 12 on the workbench 1, which prepares for the subsequent laser cutting and forming operation. The support leg 11 at the bottom of the workbench 1 provides stable support for the entire equipment. The anti-slip pad prevents the equipment from sliding during operation. The reinforcing ribs 111 at different heights further improve the structural stability of the support leg 11.

[0033] When the equipment is started, the cutting assembly 13 drives the laser cutting head 131 to the preset cutting position of the thin steel sheet 16. The pressing cover 2, which is connected to the outer shell of the laser cutting head 131 through the connecting rod 21, moves into place synchronously with the laser cutting head 131. Several pairs of balls 211 at the bottom of the pressing cover 2 are attached to the surface of the thin steel sheet 16, which not only ensures the fit between the pressing cover 2 and the thin steel sheet 16, but also does not affect the movement of the pressing cover 2 with the laser cutting head 131. At the same time, the pressing roller 221 on the fixing frame 22 first presses against one side of the cutting position of the thin steel sheet 16, while the other end of the adjusting roller 231 is attached to the other side of the cutting position. By pressing the protective cover 132 on the cover 2 to cover the cutting position synchronously with the laser cutting head 131, the sparks generated by the subsequent laser cutting are prevented from causing damage to the equipment or personnel. In addition, the compression spring 243 on the positioning rod 241 always maintains its elasticity, pushing the synchronous plate 263 on the positioning frame 24 to fit tightly against the bottom of the guide block 26, thus preparing the structure for the subsequent linkage action of the sliding frame 23 and the adjusting roller 231.

[0034] During the cutting process of the laser cutting head 131, after a slit is cut in the thin steel sheet 16, the operator starts the drive motor 251. The drive motor 251 drives the turntable 25 to rotate around the rotation center through the drive shaft 252. During the rotation of the turntable 25, the guide block 26 on the outer wall rotates synchronously. The ramp 261 of the guide block 26 contacts the synchronous plate 263 and generates a downward squeezing force, which pushes the positioning frame 24 to move downward along the positioning rod 241. This, in turn, drives the sliding frame 23 connected to the positioning frame 24 to move vertically downward synchronously, causing the adjusting roller 231 on the sliding frame 23 to move downward. The adjusting roller 231 then presses and shears the waste material to move downward synchronously, so that the cutting position of the thin steel sheet 16 generates a uniform shearing force. This, combined with the laser cutting action of the laser cutting head 131, completes the precise cutting of the thin steel sheet 16. The notch in the center of the partition plate 14 provides sufficient space for the cutting action of the laser cutting head 131 and the downward movement of the waste material, avoiding structural interference of the worktable 1 with the cutting operation.

[0035] The turntable 25 continues to rotate under the drive of the drive motor 251. When the ramp 261 of the guide block 26 disengages from the synchronous plate 263, the fixed block 27 on the turntable 25 rotates to the position corresponding to the top rod 281. The ramp 271 of the fixed block 27 contacts the guide ball 282 at the end of the top rod 281 and generates a horizontal squeezing force, pushing the slider 233 to slide horizontally along the guide rod 235 inside the slide groove 234. The tension springs 236 at both ends of the guide rod 235 undergo elastic deformation as the slider 233 slides. While the slider 233 slides horizontally, it drives the adjusting roller 231 to move horizontally through the synchronous frame 232. The adjustment roller 231 moves horizontally, eventually keeping one end pressed against the sheared waste while the other end extends to the bottom of the thin steel sheet 16, forming a counter-pressing structure with the pressing roller 221 located on top of the thin steel sheet 16. This firmly fixes the cutting position of the thin steel sheet 16, effectively preventing deformation of the thin steel sheet 16 due to heat or force during laser cutting, ensuring the cutting accuracy of the fire door metal skin. Furthermore, the tension spring 236 always maintains its elasticity, pushing the guide ball 282 to fit tightly against the surface of the fixing block 27, ensuring the continuity and precision of the horizontal movement of the adjustment roller 231.

[0036] After the adjusting roller is adjusted to the accurate position, the drive motor 251 drives the turntable 25 to continue rotating. The concave track 262 of the guide block 26 rotates to the position corresponding to the synchronous plate 263. Under the action of the reset force of the compression spring 243, the positioning frame 24 moves upward along the positioning rod 241, thereby driving the sliding frame 23 to move vertically upward synchronously, so that the adjusting roller 231 resets upward accordingly. At the same time, the inclined surface 271 of the fixing block 27 gradually disengages from the guide ball 282. The reset force of the tension spring 236 pulls the slider 233 to slide horizontally in the opposite direction along the guide rod 235, driving the adjusting roller 231 to reset horizontally synchronously, until both the adjusting roller 231 and the pressing roller 221 disengage from the surface of the thin steel sheet 16. After releasing the pressure and fixation of the thin steel sheet 16, the cutting assembly 13 moves the laser cutting head 131 and the pressing cover 2 away from the cutting position. The operator loosens the bolts between the pressure plate 15 and the slide 151, and the cut and shaped metal skin of the fire door can be removed, completing a complete metal skin cutting and forming operation. The concave track 262 of the guide block 26 ensures that the adjusting roller 231 remains in contact with the surface of the thin steel sheet 16 during the upward reset process, avoiding scratch damage to the formed metal skin caused by the reset action. The positioning plate 242 effectively prevents the positioning frame 24 from separating from the positioning rod 241 during the up and down movement, ensuring the integrity of the linkage structure of the sliding frame 23.

[0037] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A metal skin forming device for fire doors, comprising a workbench (1) and a cutting assembly (13) mounted on its surface, wherein a laser cutting head (131) is mounted on the output end of the cutting assembly (13), and a thin steel sheet (16) is placed on the workbench (1), characterized in that: The laser cutting head (131) is equipped with a pressing cover (2). A fixing frame (22) is installed at one end of the pressing cover (2). A pressing roller (221) is installed at the bottom of the fixing frame (22). A sliding frame (23) is vertically inserted at the other end of the pressing cover (2). An adjusting roller (231) is horizontally slidably installed on the sliding frame (23). The adjusting roller (231) and the pressing roller (221) press on both sides of the cutting position respectively. A drive assembly is installed on the fixed frame (22). The drive assembly includes a turntable (25). A guide block (26) is installed on the outer wall of the turntable (25). A ramp (261) is provided at one end of the guide block (26). When the guide block (26) rotates, the ramp (261) drives the sliding frame (23) and the adjusting roller (231) to move down, so that the adjusting roller (231) presses and shears the waste material to move down, so that the workpiece generates shearing force. A fixing block (27) is also installed on the turntable (25), and an inclined surface (271) is provided at one end of the fixing block (27). When the sliding frame (23) moves down, the turntable (25) continues to rotate and drives the adjusting roller (231) to slide horizontally through the inclined surface (271), so that one end of the adjusting roller (231) is pressed on the sheared waste, and the other end is placed at the bottom of the workpiece and cooperates with the pressing roller (221) to prevent it from deforming.

2. The metal skin forming device for fire doors according to claim 1, characterized in that, The workbench (1) is equipped with four support legs (11) at the bottom. The four support legs (11) are equipped with anti-slip pads at the bottom. Reinforcing ribs (111) are installed between adjacent support legs (11). The heights of the reinforcing ribs (111) are different. The workbench (1) is also equipped with a controller (12). The controller (12) is used to control the operation of the cutting assembly (13) and the drive assembly.

3. The metal skin forming device for fire doors according to claim 1, characterized in that, A protective cover (132) is installed on the pressing cover (2). The top of the protective cover (132) is installed on the outer wall of the laser cutting head (131). The protective cover (132) is used to cover the cutting position to prevent cutting sparks from splashing and causing damage. Several pairs of ball bearings (211) are installed at the bottom of the pressing cover (2), and the ball bearings (211) are attached to the thin steel sheet (16). A connecting rod (21) is installed on the pressing cover (2), and the connecting rod (21) is connected to the outer shell of the laser cutting head (131).

4. The metal skin forming device for fire doors according to claim 1, characterized in that, The workbench (1) is equipped with several pairs of partitions (14), which are used to support thin steel sheets (16). The partitions (14) have notches at their center and the notches correspond to the cutting positions. The outer walls of the partitions (14) are equipped with brackets (141), which are mounted on the workbench (1). The brackets (141) are mounted with guide rollers (142) at both ends of the brackets (141), and the guide rollers (142) are placed on the outer wall of the outermost partition (14).

5. The metal skin forming device for fire doors according to claim 4, characterized in that, The workbench (1) is equipped with slide rails (152) at both ends. A slide block (151) is slidably arranged on the slide rail (152). The slide block (151) and the slide rail (152) are locked together by bolts. A pressure plate (15) is provided on the partition (14). The pressure plate (15) and the slide block (151) are connected by another bolt. The pressure plate (15) is used to lock the thin steel sheet (16).

6. The metal skin forming device for fire doors according to claim 1, characterized in that, A positioning frame (24) is installed on the sliding frame (23). A positioning rod (241) is installed through the positioning frame (24). The bottom of the positioning rod (241) is installed on the pressing cover (2). A positioning plate (242) is installed on the top of the positioning rod (241). The diameter of the positioning plate (242) is larger than the diameter of the positioning rod (241) to prevent the positioning frame (24) from separating from the positioning rod (241). A compression spring (243) is sleeved on the positioning rod (241). One end of the compression spring (243) is engaged with the pressing cover (2). On the side wall, the other end of the compression spring (243) is engaged with the positioning frame (24). The positioning frame (24) is equipped with a synchronization plate (263). The compression spring (243) is used to drive the synchronization plate (263) to fit together with the bottom of the guide block (26). The end of the guide block (26) is provided with an inner concave track (262) with a diameter smaller than that of the guide block (26). The inner concave track (262) is used to drive the adjusting roller (231) located at the bottom of the thin steel sheet (16) to move upward, so that the adjusting roller (231) fits together with the thin steel sheet (16).

7. The metal skin forming device for fire doors according to claim 1, characterized in that, The sliding frame (23) has a sliding groove (234), and a slider (233) is slidably installed inside the sliding groove (234). A guide rod (235) is installed through the slider (233). The two ends of the guide rod (235) are installed on the side wall of the sliding groove (234). Tension springs (236) are sleeved on both ends of the guide rod (235). One end of the tension spring (236) is engaged with the sliding groove (234), and the other end of the tension spring (236) is engaged with the bottom of the slider (233). A synchronization frame (232) is installed at the bottom of the slider (233), and the synchronization frame (232) is rotatably connected to the adjusting roller (231).

8. A metal skin forming device for fire doors according to claim 7, characterized in that, The top of the slider (233) is equipped with a connecting frame (28), the end of the connecting frame (28) is equipped with a top rod (281), the end of the top rod (281) is equipped with a guide ball (282), and the tension spring (236) is used to drive the guide ball (282) to always be in contact with the fixed block (27).

9. A metal skin forming device for fire doors according to claim 1, characterized in that, A boss (254) is installed on the fixed frame (22), a drive motor (251) is installed on the boss (254), a drive shaft (252) is installed at the output end of the drive motor (251), the drive shaft (252) is connected to the rotation center of the turntable (25), a positioning seat (253) is rotatably installed on the drive shaft (252), and the positioning seat (253) is installed on the fixed frame (22).

10. A metal skin forming process for fire doors, characterized in that, The metal skin forming apparatus for a fire door according to any one of claims 1 to 9, and the metal skin forming process for a fire door, comprises the following steps: Step 1: Positioning and fixing the workpiece. Place the thin steel sheet (16) on several pairs of partitions (14) on the worktable (1). According to its size, slide the slide block (151) along the slide rail (152) to the appropriate position and lock it. Then tighten the bolts of the pressure plate (15) to lock the thin steel sheet (16) on the partition (14). The guide roller (142) fits against its edge to complete the positioning and fixing. Step 2: Equipment parameter debugging. Debug the parameters of the cutting component (13) and the drive component through the controller (12), clarify the path, power and speed of the laser cutting head (131) and the drive motor (251), and ensure that they are adapted to the molding requirements. After debugging, standby mode is activated. Step 3: After the cutting component is in place and the equipment is started, the cutting assembly (13) drives the laser cutting head (131) and the pressing cover (2) connected to the connecting rod (21) to move to the preset position; Step 4: Laser cutting and forming. The laser cutting head (131) starts cutting. After a gap appears, the drive motor (251) drives the turntable (25) to rotate through the drive shaft (252). The guide block (26) ramp (261) pushes the positioning frame (24), sliding frame (23) and adjusting roller (231) to move down, pressing the waste material to generate shearing force to cooperate with the cutting. The turntable (25) continues to rotate. The fixed block (27) ramp (271) pushes the slider (233) and adjusting roller (231) to move horizontally, so that they are pressed and fixed against the pressing roller (221) to prevent deformation. Step 5: Reset and remove the workpiece. After the cutting is completed, the guide block (26) and the concave track (262) rotate to the corresponding position. The compression spring (243) resets and pushes the adjusting roller (231) to move upward. The fixed block (27) disengages from the guide ball (282). The tension spring (236) resets and drives the adjusting roller (231) to reset horizontally. The two rollers disengage from the workpiece. After the cutting assembly (13) is removed, the staff loosens the bolts and removes the forming skin to complete the operation.

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