Sheet metal stamping die with die head convenient to replace

Abstract

The invention relates to the technical field of sheet metal stamping dies, in particular to a sheet metal stamping die convenient for die head replacement, which comprises a fixed base, a stamping mechanism is arranged on the fixed base, a hydraulic oil tank body is fixed on the stamping mechanism, and a fixing mechanism is further arranged on the fixed base. The stamping mechanism comprises two sliding rail strips fixed to the upper end of the fixed base, and stamping plates are slidably connected to the outer surfaces of the sliding rail strips. Self-adaptive adjustment of the stamping speed is achieved through the adjusting assembly, the current of an electromagnetic block can be controlled according to the thickness of a plate, the communication number of damping holes and sealing pipes is adjusted, then the flow speed of hydraulic oil is changed, impact loads are reduced, the service life of a die is prolonged, and meanwhile it is guaranteed that the plate cannot be broken in the stamping process; and the laser receiver and the laser transmitter are matched to detect the size of the workpiece, and the heating base is started to perform secondary stamping on the workpiece when the workpiece is unqualified, so that the yield of the device during machining is further improved.

Description

Technical Field

[0001] This invention relates to the field of sheet metal stamping die technology, and specifically to a sheet metal stamping die that facilitates die head replacement. Background Technology

[0002] Sheet metal stamping dies are specialized process equipment used for stamping sheet metal materials (such as thin sheet metals like steel plates and aluminum plates). By applying pressure through equipment such as presses, the sheet metal material undergoes plastic deformation or separation, thereby obtaining parts with specific shapes, sizes, and properties. Due to die wear and lifespan limitations, as well as the need for multi-variety, small-batch production, the die heads used for forming need to be replaced frequently. Sheet metal stamping dies with easy-to-change die heads can be replaced more quickly. When the die wears out, it is not necessary to replace all of them, thereby improving production efficiency and reducing production costs.

[0003] In real-world scenarios, the sheet metal formed by stamping dies is mostly made of the same material, but its thickness varies. Furthermore, the downward pressing speed of the die cannot be adjusted accordingly. As the sheet metal becomes thicker, the material itself has higher rigidity and strength, and the deformation resistance that needs to be overcome during stamping is greater. In addition, when stamping thick plates at high speed, the instantaneous contact between the die and the material will generate a large impact load, which may cause the die edge to crack or wear to be accelerated. Therefore, it will not only affect the quality of the sheet metal after stamping, but also accelerate the wear of the die, resulting in a shorter service life of the equipment and a lower yield rate of the equipment during processing. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a sheet metal stamping die that facilitates die head replacement, effectively solving the problem that the downward stamping speed of existing dies cannot be adjusted according to the sheet metal thickness.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a sheet metal stamping die that facilitates die head replacement, comprising: a fixed base, a stamping mechanism on the fixed base, a hydraulic oil tank fixed on the stamping mechanism, and a fixing mechanism on the fixed base; The stamping mechanism includes two slide rails fixed to the upper end of the fixed base. A stamping plate is slidably connected to the outer surface of the slide rails. A trigger rod is symmetrically fixed to the outer surface of the stamping plate. A trapezoidal block is fixed to the lower end of the trigger rod. A mold assembly is provided below the stamping plate. A fixing plate is fixed between the two slide rails. An adjustment assembly is provided below the fixing plate.

[0006] Preferably, the mold assembly includes an upper mold plate embedded in the lower end of the stamping plate, a first limiting groove symmetrically formed on the outer surface of the upper mold plate, a buffer plate symmetrically and elastically connected to the lower end of the upper mold plate, a lower mold plate provided below the upper mold plate, a second limiting groove symmetrically formed on the outer surface of the lower mold plate, and a material discharge hole formed in the middle of the lower end of the lower mold plate.

[0007] Preferably, the adjusting assembly includes a sealing tube fixed to the lower end of a fixed plate, a fixed tube fixed to the top wall of the sealing tube, a plurality of damping holes arrayed on the inner wall of the fixed tube, a movable tube slidably connected to the outer surface of the fixed tube, a piston tube connected to the lower end of the fixed tube, the lower end of the piston tube penetrating the movable tube and the bottom wall of the sealing tube, a piston rod slidably connected inside the piston tube, an electromagnetic block fixed to the middle of the lower end of the movable tube, a permanent magnet block fixed to the middle of the bottom wall of the sealing tube, the electromagnetic block being located directly above the permanent magnet block, and the electromagnetic block and the permanent magnet block repelling each other magnetically.

[0008] Preferably, the damping hole is connected to the hydraulic oil tank by a pipeline, and a hydraulic oil pumping device is provided between the damping hole and the hydraulic oil tank.

[0009] Preferably, the fixing mechanism includes a support base fixed to a fixed base. The upper end of the support base has a rectangular groove, and a connecting cavity is formed between two rectangular grooves. Hydraulic clamping plates are symmetrically fixed in the inner cavity of the support base. A thickness measuring device is fixed to the upper end of one of the hydraulic clamping plates. A heating base is fixed in the middle of the inner cavity of the support base. Hydraulic limiting plates are also symmetrically fixed in the inner cavity of the support base. A laser receiver is embedded in the end face of one of the hydraulic limiting plates. Limit blocks are fixed to the ends of the two hydraulic limiting plates that are close to each other. Two limiting brackets are provided below the heating base and fixed in the connecting cavity. A feeding assembly is provided between the two limiting brackets, and a feeding rod is fixed to the upper end of the feeding assembly.

[0010] Preferably, the rectangular groove is located directly below the trapezoidal block, and the upper end of the heating base is tightly fitted with the lower end of the mold assembly.

[0011] Preferably, the feeding assembly includes a movable outer shell slidably connected to the connecting cavity, a movable rod slidably connected inside the movable outer shell, a rolling rod symmetrically rotatably connected to the outer surfaces of the two movable rods, and a triangular block fixed to the ends of the two movable rods that are far apart from each other.

[0012] Preferably, an elastic element is fixed between the movable outer shell and the top wall of the connecting cavity.

[0013] The technical solution provided by this invention has the following advantages compared with the known prior art: First, the stamping speed can be adaptively adjusted by adjusting the components. The current of the electromagnetic block can be controlled according to the thickness of the sheet metal, and the number of connections between the damping holes and the sealing tubes can be adjusted, thereby changing the hydraulic oil flow rate. This makes the stamping speed inversely proportional to the sheet metal thickness (low speed for thick plates, high speed for thin plates), reducing impact loads, extending mold life, and ensuring that the sheet metal does not break during the stamping process, thus guaranteeing the processing effect of the device. Furthermore, the laser receiver and laser emitter work together to detect the workpiece size. If the workpiece is not qualified, the heating base is activated to perform a second stamping, further improving the yield rate of the device during processing.

[0014] Secondly, the fixed mechanism enables rapid replacement of the mold head. The inclined design of the limiting block and the limiting groove can automatically correct the mold position. The upper mold plate and the lower mold plate can be replaced without complete disassembly. The mold head in the device can be quickly replaced during the production process, thereby improving the processing efficiency of the device. After the stamping work is completed, the linkage of the internal components of the blanking assembly can be used to automatically lift the workpiece and complete the demolding work, further improving the processing efficiency of the device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the position and structure of the stamping mechanism of the present invention; Figure 4 This is a schematic diagram of the mold assembly structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the adjustment component of the present invention; Figure 6 This is a schematic diagram of the internal structure of the fixing mechanism of the present invention; Figure 7 for Figure 6 Enlarged view of point A in the image; Figure 8 This is a schematic diagram of the internal structure of the feeding assembly of the present invention.

[0017] Reference numerals: 1. Fixed base; 2. Stamping mechanism; 3. Hydraulic oil tank; 4. Fixing mechanism; 21. Slide rail; 22. Stamping plate; 23. Trigger rod; 24. Trapezoidal block; 25. Mold assembly; 26. Fixing plate; 27. Adjusting assembly; 251. Upper mold plate; 252. Restriction groove one; 253. Buffer plate; 254. Lower mold plate; 255. Restriction groove two; 256. Discharge hole; 271. Sealing pipe; 272. Fixing pipe; 273. 274. Damping hole; 275. Movable tube; 276. Piston tube; 277. Piston rod; 278. Electromagnetic block; 279. Permanent magnet block; 40. Laser receiver; 41. Support base; 42. Rectangular groove; 43. Hydraulic clamping plate; 44. Heating base; 45. Hydraulic limit plate; 46. Limit block; 47. Limit bracket; 48. Feeding assembly; 49. Feeding rod; 481. Movable outer shell; 482. Movable rod; 483. Rolling rod; 484. Triangular block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example: Refer to Figures 1 to 8 A sheet metal stamping die that facilitates die head replacement includes: a fixed base 1, a stamping mechanism 2 on the fixed base 1, a hydraulic oil tank 3 fixed on the stamping mechanism 2, and a fixing mechanism 4 on the fixed base 1. It should be noted that the thicker the sheet metal, the higher the rigidity and strength of the material itself. During stamping, the deformation resistance that needs to be overcome, such as plastic deformation and elastic recovery force, is greater. In order to ensure that the sheet metal can deform evenly and avoid the mold from bearing too much impact, it is usually necessary to reduce the stamping speed. Reducing the stamping speed can reduce the impact and extend the mold life.

[0021] To further explain, the following settings are made for better sheet metal stamping, such as... Figure 3 As shown, the stamping mechanism 2 includes two slide rails 21 fixed to the upper end of the fixed base 1. A stamping plate 22 is slidably connected to the outer surface of the slide rails 21. A trigger rod 23 is symmetrically fixed to the outer surface of the stamping plate 22. A trapezoidal block 24 is fixed to the lower end of the trigger rod 23. A mold assembly 25 is provided below the stamping plate 22. A fixing plate 26 is fixed between the two slide rails 21. An adjustment assembly 27 is provided below the fixing plate 26.

[0022] To further explain, the following settings are made to facilitate the replacement of the mold head, such as... Figure 4 As shown, the mold assembly 25 includes an upper mold plate 251 embedded in the lower end of the stamping plate 22. The outer surface of the upper mold plate 251 is symmetrically provided with a first limiting groove 252. The lower end of the upper mold plate 251 is symmetrically elastically connected with a buffer plate 253. A lower mold plate 254 is provided below the upper mold plate 251. The outer surface of the lower mold plate 254 is symmetrically provided with a second limiting groove 255. A material discharge hole 256 is provided in the middle of the lower end of the lower mold plate 254. It should be noted that by activating the two hydraulic clamping plates 43 and moving them closer to each other until both hydraulic clamping plates 43 are in contact with the plate, the plate placed on the lower mold plate 254 is aligned with the corner of the upper mold plate 251 and the edge of the lower mold plate 254. The thickness measuring device on the hydraulic clamping plate 43 measures the thickness of the plate. A laser beam is emitted by the laser emitter and shines perpendicularly onto the upper surface of the plate. After the light is reflected by the surface, it is captured by the receiver directly above, and the distance the light travels after emission can be obtained. It should be noted that the lower mold plates 254 of different shapes have the same height. That is to say, the thickness of the plate placed on the lower mold plate 254 can be obtained by subtracting half of the distance the light travels from the distance between the laser emitter and the lower mold plate 254.

[0023] To further explain, the following settings are made to adjust the stamping speed according to the thickness of the sheet metal, such as... Figure 5 As shown, the adjustment assembly 27 includes a sealing tube 271 fixed to the lower end of the fixing plate 26. A fixing tube 272 is fixed to the top wall of the sealing tube 271. Multiple damping holes 273 are arrayed on the inner wall of the fixing tube 272. The damping holes 273 are connected to the hydraulic oil tank 3 by a pipe. A hydraulic oil pumping device is provided between the damping holes 273 and the hydraulic oil tank 3. A movable tube 274 is slidably connected to the outer surface of the fixing tube 272. A piston tube 275 is connected to the lower end of the fixing tube 272. The lower end of the piston tube 275 passes through the movable tube 274 and the bottom wall of the sealing tube 271. A piston rod 276 is slidably connected inside the piston tube 275. An electromagnetic block 277 is fixed to the middle of the lower end of the movable tube 274. A permanent magnet block 278 is fixed to the middle of the bottom wall of the sealing tube 271. The electromagnetic block 277 is located directly above the permanent magnet block 278. The electromagnetic block 277 and the permanent magnet block 278 repel each other magnetically. Specifically, when the movable tube 274 is at its highest point, it will airtightly block the damping hole 273, thus preventing the fixed tube 272 and the sealing tube 271 from communicating with each other. When hydraulic oil enters the fixed tube 272, it will flow directly into the piston tube 275 to push the piston rod 276 to move. As the movable tube 274 moves downward, it will connect the fixed tube 272 and the sealing tube 271 through the damping hole 273. When hydraulic oil enters the fixed tube 272, some of it will flow into the sealing tube 271 through the damping hole 273, thereby reducing the downward flow speed of the piston rod 276 and affecting the downward pressing speed of the upper mold plate 251. In other words, by adjusting the current supplied to the electromagnetic block 277 to control the position of the permanent magnet block 278 and the movable tube 274, the number of connections between the damping hole 273 and the sealing tube 271 can be adjusted, thereby adjusting the downward pressing speed of the upper mold plate 251.

[0024] To further explain, the following settings are required to complete the demolding process after stamping, such as... Figure 6 and Figure 7 As shown, the fixing mechanism 4 includes a support base 41 fixed on the fixed base 1. A rectangular groove 42 is provided at the upper end of the support base 41. The rectangular groove 42 is located directly below the trapezoidal block 24. A connecting cavity is provided between the two rectangular grooves 42. Hydraulic clamping plates 43 are symmetrically fixed in the inner cavity of the support base 41. A thickness measuring device is fixed at the upper end of one of the hydraulic clamping plates 43. A heating base 44 is fixed in the middle of the inner cavity of the support base 41. The upper end of the heating base 44 is tightly fitted with the lower end of the mold assembly 25. Hydraulic limiting plates 45 are also symmetrically fixed in the inner cavity of the support base 41. A laser receiver 40 is embedded in the end face of one of the hydraulic limiting plates 45. Limiting blocks 46 are fixed at the ends of the two hydraulic limiting plates 45 that are close to each other. Two limiting brackets 47 are fixed in the connecting cavity below the heating base 44. A feeding assembly 48 is provided between the two limiting brackets 47. A feeding rod 49 is fixed at the upper end of the feeding assembly 48. Specifically, a laser emitter is embedded on the surface of the hydraulic limiting plate 45 on the other side where the laser receiver 40 is embedded. Both the laser emitter and the laser receiver 40 are at the same height as the hydraulic clamping plate 43. After the stamping work is completed, the laser emitter will be activated. When the laser emitted by the laser emitter is not recognized by the laser receiver 40, it means that the size of the stamped workpiece is qualified and it can be manually removed. The workpiece after demolding can be removed relatively easily. When the laser emitted by the laser emitter is recognized by the laser receiver 40, the device will automatically activate the heating base 44 to heat it, and then stamp the workpiece again through the upper mold plate 251. The workpiece is stamped a second time under heating conditions to ensure that the size of the workpiece is qualified.

[0025] To further explain, the following settings are made for automatic unloading after stamping, such as... Figure 8 As shown, the feeding assembly 48 includes a movable outer shell 481 that is slidably connected to the connecting cavity. An elastic element is fixed between the movable outer shell 481 and the top wall of the connecting cavity. A movable rod 482 is slidably connected inside the movable outer shell 481. The movable rod 482 is elastically connected to the inner wall of the movable outer shell 481. Rolling rods 483 are symmetrically rotatably connected to the outer surfaces of the two movable rods 482. A triangular block 484 is fixed to the ends of the two movable rods 482 that are far apart from each other. It should be noted that after the stamping operation is completed, the trapezoidal block 24 located below the triangular block 484 will pull the movable rod 482 and the movable housing 481 to move upwards simultaneously. The rolling rod 483, which is rotatably connected to the movable rod 482, will also move upwards accordingly. The two rolling rods 483 will roll on the surface of the limiting bracket 47. Due to the inclined setting of the limiting bracket 47, the rolling rod 483 will push the two movable rods 482 to move closer to each other during the upward rolling process. The unloading rod 49, which is fixedly connected to the movable housing 481, will also move upwards, thereby pushing the workpiece after stamping to demold. However, due to the pushing force of the buffer plate 253 above the workpiece, the unloading rod 49 can only lift the workpiece and then be pushed downwards by the buffer plate 253 to reset it.

[0026] The working principle of this invention is as follows: Before using the device, the upper mold plate 251 needs to be fixed to the lower end of the stamping plate 22 of the fixing plate 26, and the lower mold plate 254 needs to be placed in the middle of the inner cavity of the support base 41. Then, the two hydraulic limiting plates 45 are activated, causing the two hydraulic limiting plates 45 to move towards each other until both hydraulic limiting plates 45 contact the surface of the lower mold plate 254. At this time, the two limiting blocks 46 will be located in the two limiting grooves 255 respectively. It should be noted that the end faces of the two limiting blocks 46 and the limiting grooves 255 are all provided with inclined surfaces. Even if the position of the limiting grooves 255 is deviated, under the action of the inclined surfaces contacting and pressing each other, the two limiting blocks 46 will center the lower mold plate 254, so that it can be better fixed, and the upper end of the lower mold plate 254 can be placed. The sheet material needs to be stamped. Then, the two hydraulic clamping plates 43 are activated and moved towards each other until both hydraulic clamping plates 43 are in contact with the sheet material. This allows the sheet material placed on the lower mold plate 254 to be directly below the upper mold plate 251 and aligned with the corner of the lower mold plate 254. The thickness measuring device on the hydraulic clamping plate 43 measures the thickness of the sheet material (by emitting a laser beam at a vertical angle to the upper surface of the sheet material, which is captured by the receiver directly above, the distance the light travels after emission can be obtained. It should be noted that the lower mold plates 254 of different shapes have the same height. That is to say, the thickness of the sheet material placed on the lower mold plate 254 can be obtained by subtracting half of the distance the light travels from the distance between the laser emitter and the lower mold plate 254). Then, the hydraulic oil pumping device is activated to pump hydraulic oil from the hydraulic oil tank 3 into the fixed pipe 272. The hydraulic oil fills the fixed pipe 272 and continues to flow downwards. The impact force of the downward flow of hydraulic oil pushes the piston rod 276 in the piston tube 275 downwards. The piston rod 276 drives the stamping plate 22 and the trigger rod 23 to move downwards simultaneously. During the downward movement, the trigger rod 23 and the trapezoidal block 24 squeeze the two triangular blocks 484, causing them to push the two movable rods 482 towards each other until the two trapezoidal blocks 24 are located below the triangular blocks 484. As the stamping plate 22 moves downwards, the upper mold plate 251 also moves accordingly. The buffer plate 253, which is elastically connected to it, first contacts the plate and fixes it from above, preventing it from shifting during stamping. When the upper mold plate 251 and the lower mold plate 254 overlap, the sheet metal stamping work is completed. At this time, the hydraulic oil pumping device is driven to pump hydraulic oil in reverse, so that the hydraulic oil is drawn out from the damping hole 273. This will drive the stamping plate 22 and the trigger rod 23 to move upward at the same time. The trapezoidal block 24 located below the triangular block 484 will pull the movable rod 482 and the movable housing 481 to move upward at the same time. The rolling rod 483, which is rotatably connected to the movable rod 482, will also move upward. The two rolling rods 483 will roll on the surface of the limit bracket 47. Due to the inclined setting of the limit bracket 47, the rolling rods 483 will push the two movable rods 482 to move closer to each other during the upward rolling process. The unloading rod 49, which is fixedly connected to the movable housing 481, will also move upward, thereby pushing the workpiece after stamping to demold. However, due to the pushing force of the buffer plate 253 above the workpiece, the unloading rod 49 can only lift the workpiece and then push it down by the buffer plate 253 to reset it. It should be noted that only workpieces with qualified dimensions can be fully reset and fit against the inner wall of the lower mold plate 254. Workpieces with dimensional deviations cannot fit against the inner wall of the lower mold plate 254 without the huge impact force of the upper mold plate 251. A laser emitter is embedded on the surface of the hydraulic limit plate 45 on the other side where the laser receiver 40 is embedded, and both the laser emitter and the laser receiver 40 are at the same height as the hydraulic clamping plate 43. After the stamping work is completed, it will be activated. When the laser emitted by the laser emitter is not recognized by the laser receiver 40, it means that the dimensions of the stamped workpiece are qualified and it can be manually removed. The workpiece after demolding can be removed relatively easily. When the laser emitted by the laser emitter is recognized by the laser receiver 40, the device will automatically start the heating base 44 to heat it, and then stamp the workpiece again through the upper mold plate 251. The workpiece is stamped a second time under heating conditions to ensure that the dimensions of the workpiece are qualified. If multiple cases of unqualified dimensions occur, the upper mold plate 251 and the lower mold plate 254 need to be inspected. The adjustment component 27 can adjust the stamping speed of the upper die plate 251 according to the thickness of the sheet metal. The downward stamping speed of the upper die plate 251 is inversely proportional to the thickness of the sheet metal. That is, the thicker the sheet metal, the slower the downward stamping speed of the upper die plate 251. This allows the device to have a faster stamping speed when stamping thinner sheets, while the speed decreases when dealing with thicker sheets. Without affecting the stamping rate of the device, it can ensure that the sheet metal will not break due to stress when stamping thicker sheets. By adjusting the amount of current supplied to the permanent magnet 278, the position of the electromagnetic block 277 and the movable tube 274 can be controlled. (Supplying current to the permanent magnet 278 will cause it to become magnetic. Since the magnetism of the permanent magnet 278 and the electromagnetic block 277 repel each other, when the permanent magnet 278 is magnetic, it will push the electromagnetic block 277 and the movable tube 274 upward. The magnetism of the permanent magnet 278 is strong.) The size of the current flowing into it determines the height of the permanent magnet 278, which can precisely control the height of the electromagnetic block 277 and the permanent magnet 278. This allows for adjustment of the number of connections between the damping hole 273 and the sealing tube 271, thereby adjusting the downward pressing speed of the upper mold plate 251. (When the movable tube 274 is at its highest point, it will airtightly block the damping hole 273, thus preventing the fixed tube 272 and the sealing tube 271 from communicating. When hydraulic oil enters the fixed tube 272, it will flow directly into the piston tube 275 to push the piston rod 276 to move. As the movable tube 274 moves downward, it will connect the fixed tube 272 and the sealing tube 271 through the damping hole 273. When hydraulic oil enters the fixed tube 272, some of it will flow through the damping hole 273 into the sealing tube 271, thereby reducing the downward flow speed of the piston rod 276 and affecting the downward pressing speed of the upper mold plate 251.)

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sheet metal stamping die that facilitates die head replacement, characterized in that, include: A fixed base (1) is provided with a stamping mechanism (2), a hydraulic oil tank (3) is fixed on the stamping mechanism (2), and a fixing mechanism (4) is also provided on the fixed base (1). The stamping mechanism (2) includes two slide rails (21) fixed to the upper end of the fixed base (1). A stamping plate (22) is slidably connected to the outer surface of the slide rails (21). A trigger rod (23) is symmetrically fixed to the outer surface of the stamping plate (22). A trapezoidal block (24) is fixed to the lower end of the trigger rod (23). A mold assembly (25) is provided below the stamping plate (22). A fixing plate (26) is fixed between the two slide rails (21). An adjustment assembly (27) is provided below the fixing plate (26).

2. A sheet metal stamping die for easy die head replacement according to claim 1, characterized in that, The mold assembly (25) includes an upper mold plate (251) embedded in the lower end of the stamping plate (22). The outer surface of the upper mold plate (251) is symmetrically provided with a first limiting groove (252). The lower end of the upper mold plate (251) is symmetrically elastically connected with a buffer plate (253). A lower mold plate (254) is provided below the upper mold plate (251). The outer surface of the lower mold plate (254) is symmetrically provided with a second limiting groove (255). The lower end of the lower mold plate (254) is provided with a discharge hole (256) in the middle.

3. A sheet metal stamping die for easy die head replacement according to claim 1, characterized in that, The adjustment assembly (27) includes a sealing tube (271) fixed to the lower end of the fixing plate (26). A fixing tube (272) is fixed to the top wall of the sealing tube (271). Multiple damping holes (273) are arrayed on the inner wall of the fixing tube (272). A movable tube (274) is slidably connected to the outer surface of the fixing tube (272). A piston tube (275) is connected to the lower end of the fixing tube (272). The lower end of the piston tube (275) passes through the movable tube (274) and the bottom wall of the sealing tube (271). A piston rod (276) is slidably connected inside the piston tube (275). An electromagnetic block (277) is fixed to the middle of the lower end of the movable tube (274). A permanent magnet block (278) is fixed to the middle of the bottom wall of the sealing tube (271). The electromagnetic block (277) is located directly above the permanent magnet block (278). The electromagnetic block (277) and the permanent magnet block (278) are magnetically repulsive.

4. A sheet metal stamping die for easy die head replacement according to claim 3, characterized in that, The damping hole (273) is connected to the hydraulic oil tank (3) by a pipe, and a hydraulic oil pumping device is provided between the damping hole (273) and the hydraulic oil tank (3).

5. A sheet metal stamping die for easy die head replacement according to claim 1, characterized in that, The fixing mechanism (4) includes a support base (41) fixed on a fixed base (1). A rectangular groove (42) is provided at the upper end of the support base (41). A connecting cavity is provided between the two rectangular grooves (42). A hydraulic clamping plate (43) is symmetrically fixed in the inner cavity of the support base (41). A thickness measuring device is fixed at the upper end of one of the hydraulic clamping plates (43). A heating base (44) is fixed in the middle of the inner cavity of the support base (41). A hydraulic limiting plate (45) is also symmetrically fixed in the inner cavity of the support base (41). A laser receiver (40) is embedded in the end face of one of the hydraulic limiting plates (45). A limiting block (46) is fixed at the end of each of the two hydraulic limiting plates (45) that are close to each other. Two limiting brackets (47) are provided below the heating base (44) and fixed in the connecting cavity. A feeding assembly (48) is provided between the two limiting brackets (47). A feeding rod (49) is fixed at the upper end of the feeding assembly (48).

6. A sheet metal stamping die for easy die head replacement according to claim 5, characterized in that, The rectangular groove (42) is located directly below the trapezoidal block (24), and the upper end of the heating base (44) is tightly attached to the lower end of the mold assembly (25).

7. A sheet metal stamping die for easy die head replacement according to claim 5, characterized in that, The feeding assembly (48) includes a movable outer shell (481) slidably connected to the connecting cavity. A movable rod (482) is slidably connected inside the movable outer shell (481). Rolling rods (483) are symmetrically rotatably connected to the outer surfaces of the two movable rods (482). A triangular block (484) is fixed to one end of each of the two movable rods (482) that is far apart from each other.

8. A sheet metal stamping die for easy die head replacement according to claim 7, characterized in that, An elastic element is fixed between the movable outer shell (481) and the top wall of the connecting cavity.

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