Sheet metal stamping die facilitating die head replacement

Abstract

The present application relates to sheet metal stamping die technical field, specifically to a kind of sheet metal stamping die of die head replacement is convenient, comprising: fixed base, the fixed base is equipped with stamping mechanism, the hydraulic oil tank is fixed on the stamping mechanism, the fixed base is also equipped with fixed mechanism, the stamping mechanism includes two slide rail strips fixed on the upper end of fixed base, the outer surface of slide rail strip is slidably connected with stamping plate.The present application realizes stamping speed self-adaptive adjustment by adjusting assembly, can control electromagnetic block current according to plate thickness, adjust the communication number of damping hole and sealing tube, to change hydraulic oil flow rate, reduce impact load, prolong the service life of mould, also ensure that plate does not appear fracture during stamping process, and laser receiver and laser emitter cooperate to detect workpiece size, start heating base to workpiece when unqualified Secondary stamping, further improve the yield of device when processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sheet metal stamping die, in particular to a sheet metal stamping die facilitating die head replacement. BACKGROUND

[0002] The sheet metal stamping die is a special process equipment for stamping on sheet metal materials (such as steel plate, aluminum plate and other sheet-shaped metals), which applies pressure through a press or the like to make the sheet metal material plastically deform or separate, thereby obtaining a part with a specific shape, size and performance, and due to the wear and life limitation of the die and the demand for multi-variety and small-batch production, the die head for forming needs to be replaced frequently, and the sheet metal stamping die facilitating die head replacement can be replaced more quickly, and when the die is worn, it does not need to be replaced entirely, thereby improving production efficiency and reducing production cost.

[0003] In actual scenarios, the plate materials formed by the stamping die are mostly of the same material, but their thicknesses are different, and the downward stamping speed of the die cannot be adjusted accordingly. Since the thicker the plate material is, the higher the rigidity and strength of the material itself are, and the greater the deformation resistance to be overcome during stamping is, and when stamping the thick plate 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 out, thereby affecting the quality of the plate after stamping, and accelerating the wear of the die, resulting in a low service life of the device and a low yield of the device during processing. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a sheet metal stamping die facilitating die head replacement, which can effectively solve the problem that the downward stamping speed of the die cannot be adjusted according to the thickness of the plate.

[0005] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions:

[0006] The present application provides a sheet metal stamping die facilitating die head replacement, comprising: a fixed base, a stamping mechanism is provided on the fixed base, a hydraulic oil tank body is fixed on the stamping mechanism, and a fixing mechanism is further provided on the fixed base.

[0007] The stamping mechanism comprises two slide rail strips fixed on the upper end of the fixed base, a stamping plate is slidably connected to the outer surface of the slide rail strip, trigger rods are symmetrically fixed to the outer surface of the stamping plate, a trapezoidal block is fixed to the lower end of the trigger rod, a die assembly is provided below the stamping plate, a fixed plate is fixed between the two slide rail strips, and an adjusting assembly is provided below the fixed plate.

[0008] Preferably, the mold assembly comprises an upper mold plate embedded in the lower end of the stamping plate, the outer surface of the upper mold plate is symmetrically provided with a limiting groove I, the lower end of the upper mold plate is symmetrically and elastically connected with a buffer plate, the lower side of the upper mold plate is provided with a lower mold plate, the outer surface of the lower mold plate is symmetrically provided with a limiting groove II, and the lower end of the lower mold plate is provided with a discharging hole.

[0009] Preferably, the adjusting assembly comprises a sealing pipe fixed to the lower end of the fixed plate, the top wall of the sealing pipe is fixed with a fixed pipe, the inner wall of the fixed pipe is arrayed with a plurality of damping holes, the outer surface of the fixed pipe is slidably connected with a movable pipe, the lower end of the fixed pipe is communicated with a piston pipe, the lower end of the piston pipe penetrates through the bottom wall of the movable pipe and the sealing pipe, the piston pipe is slidably connected with a piston rod, the lower end of the movable pipe is fixed with an electromagnetic block in the middle, the bottom wall of the sealing pipe is fixed with a permanent magnet block in the middle, the electromagnetic block is located directly above the permanent magnet block, and the electromagnetic block and the permanent magnet block repel each other.

[0010] Preferably, the damping hole and the hydraulic oil tank are connected by a pipeline, and the damping hole and the hydraulic oil tank are provided with a hydraulic oil pumping device.

[0011] Preferably, the fixing mechanism comprises a support base fixed to the fixed base, a rectangular groove is formed in the upper end of the support base, a connecting cavity is formed between the two rectangular grooves, the inner cavity of the support base is symmetrically fixed with hydraulic clamping plates, the upper end of one of the hydraulic clamping plates is fixed with a thickness measuring device, the inner cavity of the support base is fixed with a heating base in the middle, the inner cavity of the support base is also symmetrically fixed with hydraulic limiting plates, the end surface of one of the hydraulic limiting plates is embedded with a laser receiver, and the ends of the two hydraulic limiting plates close to each other are fixed with limiting blocks, the lower side of the heating base is provided with two limiting supports fixed in the connecting cavities, a discharging assembly is arranged between the two limiting supports, and the upper end of the discharging assembly is fixed with a discharging rod.

[0012] Preferably, the rectangular groove is located directly below the trapezoidal block, and the upper end of the heating base is tightly attached to the lower end of the mold assembly.

[0013] Preferably, the discharging assembly comprises a movable shell slidably connected in the connecting cavity, the movable shell is slidably connected with movable rods, the outer surfaces of the two movable rods are symmetrically and rotatably connected with rolling rods, and the ends of the two movable rods away from each other are fixed with triangular blocks.

[0014] Preferably, an elastic member is fixed between the movable shell and the top wall of the connecting cavity.

[0015] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0016] First, the stamping speed is self-adaptively adjusted through the adjusting assembly, the electromagnetic block current can be controlled according to the plate thickness, the communication quantity of the damping hole and the sealing pipe is adjusted, then the hydraulic oil flow rate is changed, the stamping speed is inversely proportional to the plate thickness (thick plate low speed, thin plate high speed), the impact load is reduced, the die life is prolonged, meanwhile, the plate is prevented from being broken during the stamping process, the processing effect of the device is ensured, the laser receiver and the laser emitter cooperate to detect the workpiece size, when the workpiece is unqualified, the heating base is started to perform secondary stamping on the workpiece, and the yield of the device during processing is further improved.

[0017] Second, the die head is quickly replaced through the fixing mechanism, the die position can be automatically corrected by the inclined surface design of the limiting block and the limiting groove, the upper die plate and the lower die plate can be replaced without being completely disassembled, the die head in the device can be quickly replaced during the production process, and the processing efficiency of the device is improved, and after the stamping work is completed, the workpiece can be automatically lifted by the linkage of the internal parts of the discharging assembly, and the demolding work of the workpiece is completed, and the processing efficiency of the device is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0020] Figure 2 It is a schematic diagram of the internal structure of the present application;

[0021] Figure 3 It is a schematic diagram of the position structure of the stamping mechanism of the present application;

[0022] Figure 4 It is a schematic diagram of the die assembly structure of the present application;

[0023] Figure 5 It is a schematic diagram of the internal structure of the adjusting assembly of the present application;

[0024] Figure 6 It is a schematic diagram of the internal structure of the fixing mechanism of the present application;

[0025] Figure 7 It is Figure 6 the enlarged view of A in the figure;

[0026] Figure 8 It is a schematic diagram of the internal structure of the discharging assembly of the present application.

[0027] Fig. 1, fixed base; 2, punching mechanism; 3, hydraulic oil tank body; 4, fixing mechanism; 21, sliding rail strip; 22, punching plate; 23, trigger lever; 24, trapezoidal block; 25, die assembly; 26, fixed plate; 27, adjusting assembly; 251, upper die plate; 252, limiting groove one; 253, buffer plate; 254, lower die plate; 255, limiting groove two; 256, blanking hole; 271, sealing pipe; 272, fixed pipe; 273, damping hole; 274, movable pipe; 275, piston pipe; 276, piston rod; 277, electromagnetic block; 278, permanent magnet block; 40, laser receiver; 41, support base; 42, rectangular groove; 43, hydraulic clamping plate; 44, heating base; 45, hydraulic limiting plate; 46, limiting block; 47, limiting support; 48, blanking assembly; 49, blanking lever; 481, movable shell; 482, movable lever; 483, rolling lever; 484, triangular block. DETAILED DESCRIPTION

[0028] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0029] The present application will be further described in conjunction with the embodiments.

[0030] Embodiment: Reference Figures 1 to 8 A sheet metal stamping die facilitating die head replacement, comprising: a fixed base 1, the fixed base 1 being provided with a punching mechanism 2, the punching mechanism 2 being fixed with a hydraulic oil tank body 3, and the fixed base 1 being further provided with a fixing mechanism 4.

[0031] It should be noted that the thicker the plate is, the higher the rigidity and strength of the material itself are, and the greater the deformation resistance such as plastic deformation and elastic recovery force to be overcome during stamping is. To ensure that the plate can deform uniformly and avoid the die from bearing excessive impact, it is usually necessary to reduce the stamping speed, which can reduce the impact and prolong the service life of the die.

[0032] It should be noted that the thicker the plate is, the higher the rigidity and strength of the material itself are, and the greater the deformation resistance such as plastic deformation and elastic recovery force to be overcome during stamping is. To ensure that the plate can deform uniformly and avoid the die from bearing excessive impact, it is usually necessary to reduce the stamping speed, which can reduce the impact and prolong the service life of the die. Figure 3As shown, the stamping mechanism 2 comprises two slide rail strips 21 fixed on the upper end of the fixed base 1, the outer surface of the slide rail strip 21 is slidingly connected with a stamping plate 22, the outer surface of the stamping plate 22 is symmetrically fixed with a trigger lever 23, the lower end of the trigger lever 23 is fixed with a trapezoidal block 24, the lower side of the stamping plate 22 is provided with a die assembly 25, the two slide rail strips 21 are fixed with a fixed plate 26, and the lower side of the fixed plate 26 is provided with an adjusting assembly 27.

[0033] Further, in order to facilitate the replacement of the die head, the following settings are made, such as Figure 4 As shown, the die assembly 25 comprises an upper die plate 251 embedded in the lower end of the stamping plate 22, the outer surface of the upper die plate 251 is symmetrically provided with a limiting groove 252, the lower end of the upper die plate 251 is symmetrically and elastically connected with a buffer plate 253, the lower side of the upper die plate 251 is provided with a lower die plate 254, the outer surface of the lower die plate 254 is symmetrically provided with a limiting groove 255, and the lower end of the lower die plate 254 is provided with a discharging hole 256.

[0034] It should be noted that the two hydraulic clamping plates 43 are started to move towards each other until they contact the plate, so that the plate placed on the lower die plate 254 is located directly below the upper die plate 251 and is aligned with the corners of the lower die 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, which is perpendicular to the surface of the plate. After the light is reflected, it is captured by the receiver directly above, so that the distance moved after the light is emitted can be obtained. It should be noted that the height of the lower die plate 254 with different shapes is also the same, that is, the thickness of the plate placed on the lower die plate 254 can be obtained by subtracting half of the light moving distance from the distance between the laser emitter and the lower die plate 254.

[0035] Further, in order to adjust the stamping speed according to the thickness of the plate, the following settings are made, such as Figure 5 As shown, the adjusting assembly 27 comprises a sealing pipe 271 fixed on the lower end of the fixed plate 26, the top wall of the sealing pipe 271 is fixed with a fixed pipe 272, a plurality of damping holes 273 are arrayed on the inner wall of the fixed pipe 272, the damping holes 273 and the hydraulic oil tank 3 are connected by a pipeline, the damping holes 273 and the hydraulic oil tank 3 are provided with a hydraulic oil pumping device, the outer surface of the fixed pipe 272 is slidingly connected with a movable pipe 274, the lower end of the fixed pipe 272 is connected with a piston pipe 275, the lower end of the piston pipe 275 penetrates through the bottom wall of the movable pipe 274 and the sealing pipe 271, the piston pipe 275 is slidingly connected with a piston rod 276, the lower end of the movable pipe 274 is fixed with an electromagnetic block 277, the bottom wall of the sealing pipe 271 is fixed with a permanent magnet block 278, the electromagnetic block 277 is located directly above the permanent magnet block 278, and the electromagnetic block 277 and the permanent magnet block 278 repel each other.

[0036] Specifically, when the movable tube 274 is at the highest position, the damping hole 273 is airtight, so that the fixed tube 272 and the sealing tube 271 are not communicated with each other, when the hydraulic oil enters the fixed tube 272, it directly flows into the piston tube 275 to push the piston rod 276 to move, and as the movable tube 274 moves downward, the fixed tube 272 and the sealing tube 271 are communicated through the damping hole 273, when the hydraulic oil enters the fixed tube 272, part of the hydraulic oil will flow into the sealing tube 271 through the damping hole 273, thereby reducing the downward flow speed of the piston rod 276, thereby affecting the downward stamping speed of the upper die plate 251, that is, by adjusting the current flowing into the electromagnetic block 277 to control the position of the permanent magnet block 278 and the movable tube 274, the communication amount of the damping hole 273 and the sealing tube 271 can be adjusted, thereby adjusting the downward stamping speed of the upper die plate 251.

[0037] Further, in order to complete the demolding work after stamping, the following settings are made, as shown in Figure 6 and Figure 7 The fixed mechanism 4 comprises a support base 41 fixed to the fixed base 1, a rectangular groove 42 is formed 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 formed between the two rectangular grooves 42, and the inner cavity of the support base 41 is symmetrically fixed with hydraulic clamping plates 43, one end of one of the hydraulic clamping plates 43 is fixed with a thickness measuring device, the inner cavity of the support base 41 is fixed with a heating base 44 at the middle, the upper end of the heating base 44 is tightly attached to the lower end of the die assembly 25, the inner cavity of the support base 41 is also symmetrically fixed with hydraulic limiting plates 45, one end face of one of the hydraulic limiting plates 45 is embedded with a laser receiver 40, and one end of each of the two hydraulic limiting plates 45 close to each other is fixed with a limiting block 46, two limiting supports 47 fixed in the connecting cavity are arranged below the heating base 44, and a blanking assembly 48 is arranged between the two limiting supports 47, and the upper end of the blanking assembly 48 is fixed with a blanking rod 49.

[0038] Specifically, a laser emitter is embedded on the surface of the hydraulic limiting plate 45 on the other side of the embedded laser receiver 40, and 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 is started, when the laser emitted by the laser emitter is not recognized by the laser receiver 40, it means that the size of the workpiece after stamping is qualified, and it can be manually taken out, and the workpiece after demolding can be easily taken out, and 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 the upper die plate 251 is used to stamp the workpiece again, and the workpiece is stamped twice under the heating condition to ensure that the size of the workpiece is qualified.

[0039] Further illustrate, in order to automatically unloading after stamping, the following settings are made, such as Figure 8 As shown, the unloading assembly 48 comprises a movable shell 481 slidingly connected in the connecting cavity, and the movable shell 481 is fixed with elastic members between the top wall of the connecting cavity, and the movable shell 481 is slidingly connected with movable rods 482, and the movable rods 482 are elastically connected with the inner wall of the movable shell 481, and the outer surface of the two movable rods 482 is symmetrically rotatably connected with rolling rods 483, and the end of the two movable rods 482 away from each other is fixed with triangular blocks 484;

[0040] It should be noted that when the stamping work is finished, the trapezoidal block 24 located below the triangular block 484 will pull the movable rod 482 and the movable shell 481 to move upward at the same time, and the rolling rod 483 rotatably connected with the movable rod 482 will also move upward, and the two rolling rods 483 will roll on the surface of the limiting support 47, and due to the inclined arrangement of the limiting support 47, the rolling rod 483 will push the two movable rods 482 to move towards each other during upward rolling, and the unloading rod 49 fixedly connected with the movable shell 481 will also move upward, thereby pushing the workpiece after stamping to be demolded, but due to the pushing force of the buffer plate 253 above the workpiece, the unloading rod 49 can only be lifted by the workpiece and then pushed downward by the buffer plate 253 to reset.

[0041] The working principle of the present application is as follows: before using the device, the upper die plate 251 needs to be fixed at the lower end of the stamping plate 22 of the fixed plate 26, and the lower die plate 254 is placed in the middle of the inner cavity of the support base 41, then start two hydraulic limit plates 45, and move the two hydraulic limit plates 45 towards each other until the two hydraulic limit plates 45 contact the surface of the lower die plate 254, at this time the two limit blocks 46 will be located in the two limit grooves two 255 respectively, it should be noted that the end face of the two limit blocks 46 and the limit groove two 255 are both provided with inclined surfaces, even if the position of the limit groove two 255 is deviated, under the action of the inclined surface, the two limit blocks 46 will center the lower die plate 254, so that it can better complete the fixing work, and then place the plate to be formed by stamping on the upper end of the lower die plate 254, then start two hydraulic clamping plates 43 and move them towards each other until the two hydraulic clamping plates 43 contact the plate, so that the plate placed on the lower die plate 254 is located directly below the upper die plate 251 and is aligned with the corners of the lower die plate 254, the thickness measuring device on the hydraulic clamping plate 43 can measure the thickness of the plate (by emitting a vertical angle of laser through the laser emitter, which is irradiated to the upper surface of the plate, which is captured by the receiver directly above, so that the distance moved after the light emission can be obtained, it should be noted that the height of the lower die plate 254 with different shapes is also the same, that is, the distance between the laser emitter and the lower die plate 254 is subtracted by half of the light moving distance, so that the thickness of the plate placed on the lower die plate 254 can be obtained);

[0042] Then start the hydraulic oil pumping device from the hydraulic oil tank 3 to the fixed pipe 272 pumping hydraulic oil, hydraulic oil into the fixed pipe 272 will fill the fixed pipe 272, and then continue to flow down, the impact of the downward flow of hydraulic oil can push the piston rod 276 in the piston pipe 275 to move downward, the piston rod 276 will drive the punch plate 22 and the trigger rod 23 to move downward at the same time, the trigger rod 23 and the trapezoidal block 24 will extrude two triangular blocks 484 in the process of moving downward, so as to push two movable rods 482 to move in the direction of approaching each other, until two trapezoidal blocks 24 move to below the triangular block 484, while the punch plate 22 moves downward, the upper die plate 251 will also move, and the buffer plate 253 elastically connected thereto will first contact the plate and fix it from above, so that it cannot deviate during stamping, when the upper die plate 251 coincides with the lower die plate 254, the sheet metal stamping work on the plate is completed, at this time the driving hydraulic oil pumping device pumps hydraulic oil in the opposite direction, so that it is pumped out from the damping hole 273, which drives the punch plate 22 and the trigger rod 23 to move upward at the same time, the trapezoidal block 24 below the triangular block 484 pulls the movable rod 482 and the movable housing 481 to move upward at the same time, the rolling rod 483 rotationally connected with the movable rod 482 also moves upward, the two rolling rods 483 roll on the surface of the limiting support 47, and due to the inclined arrangement of the limiting support 47, the rolling rod 483 will push the two movable rods 482 to move in the direction of approaching each other in the process of rolling upward, and the stripping rod 49 fixedly connected with the movable housing 481 also moves upward, thereby pushing the workpiece after stamping to be demolded;

[0043] But due to the pushing force of the buffer plate 253 above the workpiece, the blanking rod 49 can only be lifted up and then pushed down by the buffer plate 253 to reset it. It should be noted that only the workpiece with qualified size can be completely reset and attached to the inner wall of the lower die plate 254, while the workpiece with size deviation cannot be attached to the inner wall of the lower die plate 254 under the action of the huge impact force of the upper die plate 251. A laser emitter is embedded on the surface of the hydraulic limiting plate 45 on the other side of the laser receiver 40, and the laser emitter and the laser receiver 40 are at the same height as the hydraulic clamping plate 43. After completing the stamping work, the laser emitter will be started. When the laser emitted by the laser emitter is not recognized by the laser receiver 40, it means that the workpiece after stamping is qualified in size, and it can be manually taken out. The workpiece that has completed demolding can be easily taken out, while after 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 the workpiece is stamped again by the upper die plate 251. The workpiece is stamped twice under the heating condition to ensure that the size of the workpiece can be qualified, and if multiple size unqualified conditions occur, the upper die plate 251 and the lower die plate 254 need to be checked;

[0044] The adjusting assembly 27 can adjust the punching speed of the upper die plate 251 according to the thickness of the plate. The downward punching speed of the upper die plate 251 is inversely proportional to the thickness of the plate. That is, the thicker the plate, the slower the downward punching speed of the upper die plate 251. When the device punches thinner plates, it has a faster punching speed, and when it faces thicker plates, the speed decreases. Without affecting the punching speed of the device, it can ensure that the plate does not break due to stress when punching thicker plates. By adjusting the current flowing into the permanent magnet 278, the position of the electromagnetic block 277 and the movable tube 274 can be controlled (the permanent magnet 278 generates magnetism when it is electrified. Since the magnetism of the permanent magnet 278 and the electromagnetic block 277 repels each other, when the permanent magnet 278 has magnetism, it will push the electromagnetic block 277 and the movable tube 274 to move upward. The size of the magnetism of the permanent magnet 278 is determined by the size of the current flowing into it, so that the permanent magnet 278 can accurately control the height of the electromagnetic block 277 and the permanent magnet 278). The number of communication between the damping hole 273 and the sealing tube 271 can be adjusted, and then the downward punching speed of the upper die plate 251 can be adjusted (when the movable tube 274 is at the highest position, it will be airtight to the damping hole 273, and then the fixed tube 272 and the sealing tube 271 will not be in communication with each other. When hydraulic oil enters the fixed tube 272, it will directly flow into the piston tube 275 to push the piston rod 276 to move. With the downward movement of the movable tube 274, the fixed tube 272 and the sealing tube 271 will be connected through the damping hole 273. When hydraulic oil enters the fixed tube 272, part of the hydraulic oil will flow into the sealing tube 271 through the damping hole 273, thereby reducing the downward flow speed of the piston rod 276, thereby affecting the downward punching speed of the upper die plate 251).

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions described in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

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). The adjustment assembly (27) includes a sealing tube (271) fixed to the lower end of the fixing plate (26), a fixing tube (272) fixed to the top wall of the sealing tube (271), a plurality of damping holes (273) arrayed on the inner wall of the fixing tube (272), a movable tube (274) slidably connected to the outer surface of the fixing tube (272), a piston tube (275) connected to the lower end of the fixing tube (272), the lower end of the piston tube (275) penetrating the movable tube (274) and the bottom wall of the sealing tube (271), a piston rod (276) slidably connected inside the piston tube (275), an electromagnetic block (277) fixed to the middle of the lower end of the movable tube (274), a permanent magnet block (278) fixed to the middle of the bottom wall of the sealing tube (271), the electromagnetic block (277) being located directly above the permanent magnet block (278), and the electromagnetic block (277) and the permanent magnet block (278) repelling each other magnetically; 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). 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). 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. The trigger rod (23) and the trapezoidal block (24) will squeeze the two triangular blocks (484) as they move downward.

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 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).

4. A sheet metal stamping die for easy die head replacement according to claim 1, 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).

5. A sheet metal stamping die for easy die head replacement according to claim 1, 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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