Pressure compensation device

Abstract

The embodiment of the invention relates to a pressure compensation device. The pressure compensation device comprises a first platform; when the second platform works, the second platform does opposite reciprocating motion relative to the first platform; the temperature detection device is used for detecting the device temperature; the control device sends the detected current temperature to the control device, and the control device generates a compensation signal according to the temperature difference between the current temperature and the reference temperature; the adjusting device is connected with the second platform and is electrically connected with the control device; the adjusting module is used for adjusting the distance between the first platform and the second platform according to the compensation signal, so that the working pressure of the first platform and the second platform is kept stable; and the shell is used for fixing and accommodating the first platform, the second platform and the adjusting device. According to the pressure compensation device provided by the embodiment of the invention, the position between the first platform and the second platform can be adaptively adjusted according to the temperature change, so that the working pressure of the first platform and the working pressure of the second platform are constant, the time cost is saved, the mold damage rate is reduced, and the yield of products can be improved.

Description

Technical Field

[0001] The invention relates to the field of mechanical technology, and in particular to a pressure compensation device. Background Art

[0002] Existing die-cutting machines and hot stamping machines have moving parts and stationary parts. The moving part reciprocates up and down, and a mold is installed between the stationary part and the moving part to achieve die-cutting, hot stamping, embossing, embossing and other work on the product. When the machine is running, it will generate heat, and the ambient temperature will also change. The temperature change will cause the distance between the moving part and the stationary part to change due to thermal expansion and contraction, thereby causing pressure changes. The pressure change will cause the product to be cut unfastened or damaged; at the same time, the pressure change will damage or shorten the service life of the mold.

[0003] At present, one existing method is the machine preheating method, which is to let the machine idle for about 2 hours, wait for the temperature to rise, and then start production after the temperature reaches a stable level. However, this will waste a lot of time and cost. Moreover, if the temperature and pressure change later, the above problems will occur again. Summary of the invention

[0004] The object of the present invention is to provide a pressure compensation device, which performs pressure compensation when temperature changes lead to pressure changes, thereby adapting to temperature changes, saving time costs and improving the yield rate.

[0005] To this end, an embodiment of the present invention provides a pressure compensation device, the device comprising: a first platform, the first platform being relatively stationary; A second platform is arranged corresponding to the first platform, and when in operation, the second platform performs reciprocating motion relative to the first platform; A temperature detection device, used for detecting the temperature of the device; A control device electrically connected to the temperature detection device, wherein the temperature detection device sends the detected current temperature to the control device, and the control device generates a compensation signal according to the temperature difference between the current temperature and the reference temperature; an adjusting device, connected to the second platform and electrically connected to the control device; used for adjusting the distance between the first platform and the second platform according to the compensation signal, so that the working pressure of the first platform and the second platform remains stable; The shell is used to fix and accommodate the first platform, the second platform and the adjusting device, and a machine base is provided at the bottom of the shell.

[0006] Preferably, the first platform is a static platform of a die-cutting machine or a hot stamping machine; and the second platform is a dynamic platform of a die-cutting machine or a hot stamping machine.

[0007] Further preferably, there is a mold between the static platform and the dynamic platform to perform die-cutting, hot stamping, embossing or embossing on the product.

[0008] Preferably, when the temperature rises, the distance between the second platform and the first platform decreases, and the regulating device controls the distance between the second platform and the first platform to increase, thereby ensuring that the distance and pressure between the second platform and the first platform remain unchanged; When the temperature decreases, the distance between the second platform and the first platform increases, and the regulating device controls the distance between the second platform and the first platform to decrease, thereby ensuring that the distance and pressure between the second platform and the first platform remain unchanged.

[0009] Preferably, the control device is a programmable logic controller.

[0010] Preferably, the regulating device comprises a power module, a screw rod, a pressure regulating rod, an inclined block, a toggle base, a lower toggle, an upper toggle, a crankshaft and a connecting rod; The nut of the screw rod is connected to the driving end of the power module, and the nut is driven by the power module to move the screw rod left and right; One end of the pressure regulating rod is connected to one end of the screw rod, and the inclined block is fixed on the pressure regulating rod; The toggle base is arranged on the inclined block and is relatively fixed to the housing through the vertical slot thereon, thereby limiting the toggle base to move up and down; The lower toggle lever is connected to the toggle lever base via a lower toggle lever shaft; One end of the connecting rod is connected to the crankshaft, and the other end is connected to the lower elbow rod and the upper elbow rod through the connecting rod shaft; The crankshaft is fixed on the machine base through an axle seat.

[0011] The upper toggle lever is connected to the second platform via an upper toggle lever shaft.

[0012] Further preferably, the power module includes a flange, a servo motor, a large sprocket and a chain; The flange is fixed on the housing; The screw rod is arranged at the center of the large sprocket, and the screw rod is fixed to the large sprocket through a nut, and the large sprocket, the nut and the screw rod are fixed together at the rotating end inside the flange; The chain is connected around the small sprocket and the large sprocket at the driving end of the servo motor. The small sprocket of the servo motor rotates to drive the chain to move, thereby driving the large sprocket to rotate, thereby driving the nut to rotate, and then driving the lead screw, the pressure regulating rod, and the inclined block to move left and right. Since the elbow base is limited, the elbow base moves up and down, driving the lower elbow shaft, the lower elbow, the upper elbow, the upper elbow shaft and the second platform to move up and down.

[0013] Further preferably, the temperature detection device detects the temperatures of the upper elbow rod, the lower elbow rod and the connecting rod.

[0014] Further preferably, the toggle base is fixed to the machine base via a vertical groove thereon.

[0015] Further preferably, the control device calculates the servo motor positioning value P according to the following formula: S , P S =P×K1; Among them, P=P0+(t0-t1)×K, P is the actual pressure position, P0 is the pressure setting position, K is the coefficient of pressure change with temperature, t0 is the reference temperature, and t1 is the current temperature; K1=(incline block slope × servo electronic gear) / (screw pitch × sprocket reduction ratio × 100), K1 is the number of pulses required for unit pressure.

[0016] The pressure compensation device provided in the embodiment of the present invention can adaptively adjust the position between the first platform and the second platform according to the change of temperature, so that the working pressure of the first platform and the second platform is constant, thereby saving time cost, reducing the mold damage rate, and improving the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a pressure compensation device of the present invention; Figure 2 Schematic diagram of the internal structure of the pressure compensation device of the present invention Figure 1 ; Figure 3 Schematic diagram of the internal structure of the pressure compensation device of the present invention Figure 2 ; Figure 4 It is a schematic diagram of the partial internal structure of the pressure compensation device of the present invention.

[0018] In the figure, 1, first platform; 2, second platform; 3, temperature detection device; 4, adjustment device; 5, housing; 41, power module; 42, screw; 421, nut; 43, pressure regulating rod; 44, inclined block; 45, elbow base; 451, vertical slot; 46, lower elbow; 461, lower elbow shaft; 47, upper elbow; 471, upper elbow shaft; 48, crankshaft; 49, connecting rod; 491, connecting rod shaft; 411, flange; 412, servo motor; 413, large sprocket; 414, chain; 51, machine base; 52, operation surface wall panel. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments.

[0020] Figure 1is a schematic diagram of a pressure compensation device of the present invention, Figure 2 Schematic diagram of the internal structure of the pressure compensation device of the present invention Figure 1 , Figure 3 Schematic diagram of the internal structure of the pressure compensation device of the present invention Figure 2 ,like Figures 1 to 3 As shown, the pressure compensation device of the present invention includes a first platform 1, a second platform 2, a temperature detection device 3, a control device, an adjustment device 4 and a shell 5.

[0021] The first platform 1 is relatively stationary; the second platform 2 is arranged corresponding to the first platform 1, and when working, the second platform 2 makes reciprocating motion relative to the first platform 1 under the adjustment of the adjustment device 4; the temperature detection device 3 is used to detect the temperature of the device, and the temperature detection device 3 here can be specifically a temperature sensor, which detects the temperature of the adjustment device 4; the control device is electrically connected to the temperature detection device 3, and the temperature detection device 3 sends the detected current temperature to the control device, and the control device produces a compensation signal according to the temperature difference between the current temperature and the reference temperature; the adjustment device 4 is connected to the second platform 2 and is electrically connected to the control device; it is used to adjust the distance between the first platform 1 and the second platform 2 according to the compensation signal, so that the working pressure of the first platform 1 and the second platform 2 remains stable; the shell 5 is used to fix and accommodate the first platform 1, the second platform 2 and the adjustment device 4, and the bottom of the shell 5 is provided with a machine base 51.

[0022] Specifically, the first platform 1 can be a static platform of a die-cutting machine or a hot stamping machine, and the second platform 2 can be a dynamic platform of a die-cutting machine or a hot stamping machine. A mold is provided between the static platform and the dynamic platform to perform die-cutting, hot stamping, embossing or embossing on the product.

[0023] When the machine is running, heat is generated and the ambient temperature also changes. Temperature changes cause the crankshaft 48, connecting rod 49, elbow rod and other components in the regulating device 4 to expand and contract, which in turn causes the distance between the moving platform and the static platform to change. When the temperature rises, the distance between the moving platform and the static platform decreases; when the temperature drops, the distance between the moving platform and the static platform increases, thereby causing the pressure to change. Pressure changes can cause the product to be cut unsuccessfully and damage the product. Pressure changes can also damage or shorten the service life of the mold. Therefore, the design principle of the present application is that when the temperature rises, the distance between the two platforms is increased by adjusting the adjustment device 4, and when the temperature decreases, the distance between the two platforms is decreased by adjusting the adjustment device 4. Specifically, when the temperature rises, due to thermal expansion and contraction, the distance between the second platform 2 and the first platform 1 decreases, and the adjustment device 4 controls the distance between the second platform 2 and the first platform 1 to increase, thereby ensuring that the distance and pressure between the second platform 2 and the first platform 1 remain unchanged; when the temperature decreases, the distance between the second platform 2 and the first platform 1 increases, and the adjustment device 4 controls the distance between the second platform 2 and the first platform 1 to decrease, thereby ensuring that the distance and pressure between the second platform 2 and the first platform 1 remain unchanged.

[0024] The control device can be a programmable logic controller PLC. When the machine temperature or the ambient temperature changes, the distance between the moving platform and the static platform changes due to the temperature, thereby causing the working pressure to change. The temperature sensor detects the real-time temperature of the machine, and then sends the temperature data to the PLC for calculation. The PLC performs distance compensation calculation based on the current temperature and the reference temperature, and sends the calculation result to the servo motor 412 of the adjustment device 4, so that the servo motor 412 increases or decreases the distance between the moving platform and the static platform, so that the distance remains consistent, thereby keeping the working pressure consistent, thereby performing temperature and pressure compensation, so that the working pressure of the machine remains unchanged. In a specific example, for example: the heating temperature of the machine rises by 1 degree, and the distance between the moving platform and the static platform increases by 0.005mm compared with the reference distance after the pressure increases. The temperature sensor will detect the temperature rise, and then send the signal to the PLC. After comparison and calculation, the servo motor 412 for adjusting the pressure is adjusted accordingly, and the current distance between the moving platform and the static platform is reduced by 0.005mm, so that the adjusted distance remains unchanged from the previous reference distance, so the actual pressure of the machine remains unchanged.

[0025] In some specific embodiments, Figures 1 to 4 As shown, the above-mentioned adjusting device 4 may specifically include a power module 41, a screw 42, a pressure regulating rod 43, a bevel block 44, an elbow base 45, a lower elbow 46, an upper elbow 47, a crankshaft 48 and a connecting rod 49, and the connection relationship and working process therebetween are described in detail below.

[0026] The power module 41 here is a power source, which provides power for the up and down displacement of the second platform 2 through the transmission component. The screw rod 42 is provided with a nut 421 adapted thereto, and the nut 421 is connected to the driving end of the power module 41, and the nut 421 is driven by the power module 41, thereby driving the screw rod 42 to move left and right. One end of the pressure regulating rod 43 is connected to one end of the screw rod 42, and the inclined block 44 is fixedly installed on the pressure regulating rod 43. When the screw rod 42 moves left and right, it will drive the pressure regulating rod 43 and the inclined block 44 thereon to move left and right.

[0027] The elbow rod base 45 is arranged on the inclined block 44 and is relatively fixed to the shell 5 through the vertical groove 451 thereon. Preferably, a machine base 51 is provided at the bottom of the shell 5, and the elbow rod base 45 is fixed to the machine base 51 through the vertical groove 451 thereon, thereby limiting the elbow rod base 45 to only move up and down but not left and right. The lower surface of the elbow rod base 45 is an inclined surface, which cooperates with the upper inclined surface of the inclined block 44. When the inclined block 44 moves left and right, the upper inclined surface of the inclined block 44 and the lower inclined surface of the elbow rod base 45 generate operating force, causing the elbow rod base 45 to rise or fall.

[0028] The lower elbow rod 46 is connected to the elbow rod base 45 through the lower elbow rod shaft 461, one end of the connecting rod 49 is connected to the crankshaft 48, and the other end is connected to the lower elbow rod 46 and the upper elbow rod 47 through the connecting rod shaft 491. It can be understood that one end of the lower elbow rod 46 is connected to the lower elbow rod shaft 461, and the other end is connected to the connecting rod shaft 491, one end of the upper elbow rod 47 is connected to the upper elbow rod shaft 471, and the other end is connected to the connecting rod shaft 491; the crankshaft 48 is fixed to the machine base 51 through an axle seat, preferably fixed through four axle seats, and the upper elbow rod 47 is connected to the second platform 2 through the upper elbow rod shaft 471, so that when the elbow rod base 45 moves up and down, it will drive the lower elbow rod shaft 461, the lower elbow rod 46, the connecting rod 49, the connecting rod shaft 491, the upper elbow rod 47, and the upper elbow rod shaft 471 to move up and down, thereby driving the second platform 2 to move up and down, thereby adjusting the pressure between the first platform 1 and the second platform 2.

[0029] Furthermore, in some embodiments, the power module 41 specifically includes a flange 411, a servo motor 412, a large sprocket 413 and a chain 414. The flange 411 is fixed on the housing 5. Preferably, the housing 5 includes an operating surface wall panel 52, and the flange 411 can be fixed on the operating surface wall panel 52; a screw rod 42 is arranged at the center of the large sprocket 413, and the screw rod 42 is fixed to the large sprocket 413 through a nut 421, and the large sprocket 413, the nut 421 and the screw rod 42 are fixed together at the rotating end inside the flange 411; the chain 414 is connected around the small sprocket and the large sprocket 413 at the driving end of the servo motor 412, and the small sprocket of the servo motor 412 rotates, driving the chain 414 to move, driving the large sprocket 413 to rotate, and since the large sprocket 413 and the nut 421 of the screw rod 42 are fixed, the large sprocket 413 drives the nut 421 to rotate. 21 rotates together, thereby driving the screw rod 42 to move left and right, and the screw rod 42 will drive the pressure regulating rod 43 to move. The inclined block 44 is installed on the pressure regulating rod 43, which will also drive the inclined block 44 to move left and right; the upper inclined surface of the inclined block 44 and the lower inclined surface of the elbow rod base 45 produce relative movement. Due to the force on the inclined surface, after the lower inclined surface of the elbow rod base 45 is stressed, the elbow rod base 45 is limited, which will cause the elbow rod base 45 to move up and down; the up and down movement of the elbow rod base 45 drives the lower elbow rod shaft 461, the lower elbow rod 46, the connecting rod 49, the connecting rod shaft 491, the upper elbow rod 47, and the upper elbow rod shaft 471 to move up and down together, and finally the second platform 2 is displaced up and down, so as to achieve the purpose of increasing and reducing pressure.

[0030] In some preferred embodiments, in order to better ensure the stability of the motion platform during the motion process, the transmission components can be two groups, that is, the screw rod 42, the pressure regulating rod 43, the inclined block 44, the elbow base 45, the lower elbow 46, the upper elbow 47, the connecting rod 49, the flange 411, and the large sprocket 413 can all be two groups, which are symmetrically arranged on both sides of the bottom of the motion platform, and the two groups of connecting rods 49 are connected to a crankshaft 48. The servo motor 412 drives the two groups of large sprockets 413 at the same time, thereby driving the two groups of transmission components to move at the same time, and jointly drive the motion platform to move up and down. Further preferably, the transmission components can be four groups, and two groups of transmission components are arranged on both sides of the bottom of the motion platform to better ensure the transmission process and balance of the motion platform.

[0031] In some preferred embodiments, the temperature detection device 3 can be installed on, including but not limited to, the upper elbow rod 47, the lower elbow rod 46, and the connecting rod 49, to detect the temperature of the upper elbow rod 47, the lower elbow rod 46, and the connecting rod 49. When the temperature rise is detected, the adjustment device 4 controls the distance between the second platform 2 and the first platform 1 to increase, thereby ensuring that the distance and pressure between the second platform 2 and the first platform 1 remain unchanged; when the temperature decreases, the adjustment device 4 controls the distance between the second platform 2 and the first platform 1 to decrease, thereby ensuring that the distance and pressure between the second platform 2 and the first platform 1 remain unchanged.

[0032] In order to ensure that the pressure between the first platform 1 and the second platform 2 can be accurately adjusted when the temperature changes and the pressure between the two is stable, the control device calculates the servo motor positioning value P according to the following formula S , P S =P×K1.

[0033] Wherein, P=P0+(t0-t1)×K; P here is the actual pressure position, in mm, P0 is the pressure setting position, in mm, K is the coefficient of pressure position variation with temperature, in mm / ℃; t0 is the reference temperature, in ℃, t1 is the current temperature, in ℃. Preferably, for the convenience of precision description, the units of P0 and P can also be 0.01mm.

[0034] K1=(inclined block slope × servo electronic gear) / (screw pitch × sprocket reduction ratio × 100), where K1 refers to the number of pulses per unit pressure. In this example, a unit quantity is set to 0.01mm, so it is divided by 100 when calculating K1. In other words, K1 specifically refers to the number of pulses corresponding to a unit pressure of 0.01mm; the slope of the inclined block 44 here refers to the ratio between the left and right displacement of the inclined block 44 and the up and down displacement of the object on the inclined block 44 when the inclined block 44 moves. For example, when the inclined block moves 25mm in the left and right direction, the object on the inclined block 44 moves up and down by 1mm, and the slope is 25:1; the servo electronic gear indicates the number of pulses sent by the PLC that the servo motor needs to receive for one circle; the sprocket reduction ratio is the ratio of the number of teeth of the small pressure regulating sprocket on the servo motor 412 to the number of teeth of the large pressure regulating sprocket 413, for example, the number of teeth of the small pressure regulating sprocket is 16 teeth, and the number of teeth of the large pressure regulating sprocket 413 is 40 teeth, then the sprocket reduction ratio is 16:40=2:5. The calculation method provided in this embodiment is based on the inherent linear thermal expansion coefficient characteristics of metal materials, and the die-cutting pressure position is adjusted by detecting the material temperature, thereby ensuring the pressure stability at different temperatures, which has been verified by actual measurement.

[0035] In order to better understand the above formula, a specific example is given below. In this embodiment, the screw 42 pitch is set to 5mm, the slope of the ramp is 25:1, the sprocket reduction ratio is 2:5, and the servo electronic gear is 800 pulses / turn, that is, the servo motor needs to receive 800 pulses from the PLC for one turn. Substituting into the above formula, K1=(25×800) / (5×0.4×100)=100 pulses / 0.01mm, indicating that 100 pulses are required to output for the second platform to move up and down a unit amount of 0.01mm. Furthermore, the servo motor positioning value P S It refers to how many pulses the PLC needs to send to make the platform reach the required pressure position. When the second platform needs to set the pressure position to 90 units (each unit is 0.01mm), the PLC needs PS =P×K1=90×100=9000 pulses to drive the servo motor.

[0036] In other words, in this embodiment, the screw rod 42 is set to have a pitch of 5 mm, the inclined block slope is 25:1, and the sprocket reduction ratio is 2:5. When the servo motor runs for one cycle, since the ratio of the number of teeth of the small pressure regulating sprocket / large pressure regulating sprocket 413 is 2 / 5, the large sprocket actually runs 0.4 turns. Since the large pressure regulating sprocket 413 is fixedly connected to the screw rod nut 421, the screw rod nut 421 also runs 0.4 turns, that is, the screw rod 42 runs 0.4 turns, and the corresponding left and right movement of the pressure regulating screw rod 42 is: 0.4 turns × 5mm / turn = 2mm. The inclined block 44, the pressure regulating rod 43, and the screw rod 42 are fixedly connected, so the inclined block 44 also moves 2mm left and right; the slope of the inclined block 44 is 25:1, and the up and down movement of the inclined block 44 is 2 / 25 = 0.08mm. Here, the unit amount of movement of the second platform 2 is defined as 0.01mm. The number of pulses required by the servo motor 412 when the second platform 2 moves unit is 100 pulses. The number of pulses required for the servo motor 412 to rotate one circle = 0.08mm×(100 pulses / 0.01mm) = 800 pulses. It can be deduced that 800 pulses make the motor run one circle, and the platform moves up and down 8 unit amounts, that is, 0.08mm.

[0037] In another specific example, if the reference temperature is set to 25°C, the temperature variation coefficient K is 1 unit / °C, the pressure setting P0 is 80 units, and when the temperature rises to 26°C during machine operation, the actual pressure position P=80-1=79 units, and the servo motor positioning value P S =79×100=7900 pulses, that is, when the temperature rises by 1°C, the pressure is reduced by 1 unit, and when the temperature drops by 1°C, the pressure is increased by 1 unit. When the temperature remains unchanged, the working pressure remains unchanged. For another example, when the reference temperature is 35 degrees, the pressure value is adjusted to 100 units, which is in the best working state. When the machine is running hot or the ambient temperature changes, rising or falling by 1°C, the real-time temperature is sent to the PLC, and the compensation value is obtained after calculation, and the servo motor performs the compensation operation.

[0038] The pressure compensation device of the present invention has the following advantages: 1. No need to preheat the machine, which increases production time and improves production efficiency.

[0039] 2. When the ambient temperature changes, there is no need to manually adjust the machine pressure, which reduces the labor intensity of workers.

[0040] 3. The pressure compensation device can be adjusted accurately, and the adjustment distance can be achieved within plus or minus 0.01mm.

[0041] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0043] In the descriptions in this specification, the terms "a specific embodiment", "some embodiments", "an embodiment", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0044] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure compensation device, characterized in that: The pressure compensation device comprises: a first platform, the first platform being relatively stationary; A second platform is arranged corresponding to the first platform, and when in operation, the second platform performs reciprocating motion relative to the first platform; A temperature detection device, used for detecting the temperature of the device; A control device electrically connected to the temperature detection device, wherein the temperature detection device sends the detected current temperature to the control device, and the control device generates a compensation signal according to the temperature difference between the current temperature and the reference temperature; an adjusting device, connected to the second platform and electrically connected to the control device; used for adjusting the distance between the first platform and the second platform according to the compensation signal, so that the working pressure of the first platform and the second platform remains stable; The shell is used to fix and accommodate the first platform, the second platform and the adjusting device, and a machine base is provided at the bottom of the shell.

2. The pressure compensation device according to claim 1, characterized in that: The first platform is a static platform of the die-cutting machine or the hot stamping machine; the second platform is a dynamic platform of the die-cutting machine or the hot stamping machine.

3. The pressure compensation device according to claim 2, characterized in that: A mold is provided between the static platform and the dynamic platform to perform die-cutting, hot stamping, embossing or embossing on the product.

4. The pressure compensation device according to claim 1, characterized in that: When the temperature rises, the distance between the second platform and the first platform decreases, and the regulating device controls the distance between the second platform and the first platform to increase, thereby ensuring that the distance and pressure between the second platform and the first platform remain unchanged; When the temperature decreases, the distance between the second platform and the first platform increases, and the regulating device controls the distance between the second platform and the first platform to decrease, thereby ensuring that the distance and pressure between the second platform and the first platform remain unchanged.

5. The pressure compensation device according to claim 1, characterized in that: The control device is a programmable logic controller.

6. The pressure compensation device according to claim 1, characterized in that: The regulating device comprises a power module, a screw rod, a pressure regulating rod, an inclined block, a toggle base, a lower toggle, an upper toggle, a crankshaft and a connecting rod; The nut of the screw rod is connected to the driving end of the power module, and the nut is driven by the power module to move the screw rod left and right; One end of the pressure regulating rod is connected to one end of the screw rod, and the inclined block is fixed on the pressure regulating rod; The toggle base is arranged on the inclined block and is relatively fixed to the housing through the vertical slot thereon, thereby limiting the toggle base to move up and down; The lower toggle lever is connected to the toggle lever base via a lower toggle lever shaft; One end of the connecting rod is connected to the crankshaft, and the other end is connected to the lower elbow rod and the upper elbow rod through the connecting rod shaft; The crankshaft is fixed on the machine base through an axle seat. The upper toggle lever is connected to the second platform via an upper toggle lever shaft.

7. The pressure compensation device according to claim 6, characterized in that: The power module includes a flange, a servo motor, a large sprocket and a chain; The flange is fixed on the housing; The screw rod is arranged at the center of the large sprocket, and the screw rod is fixed to the large sprocket through a nut, and the large sprocket, the nut and the screw rod are fixed together at the rotating end inside the flange; The chain is connected around the small sprocket and the large sprocket at the driving end of the servo motor. The small sprocket of the servo motor rotates to drive the chain to move, thereby driving the large sprocket to rotate, thereby driving the nut to rotate, and then driving the lead screw, the pressure regulating rod, and the inclined block to move left and right. Since the elbow base is limited, the elbow base moves up and down, driving the lower elbow shaft, the lower elbow, the upper elbow, the upper elbow shaft and the second platform to move up and down.

8. The pressure compensation device according to claim 6, characterized in that: The temperature detection device detects the temperatures of the upper elbow link, the lower elbow link and the connecting rod.

9. The pressure compensation device according to claim 7, characterized in that: The toggle lever base is fixed to the machine base via a vertical groove thereon.

10. The pressure compensation device according to claim 7, characterized in that: The control device calculates the servo motor positioning value Ps according to the following formula: Ps=P×K1; Among them, P=P0+(t0-t1)×K, P is the actual pressure position, P0 is the pressure setting position, K is the coefficient of pressure change with temperature, t0 is the reference temperature, and t1 is the current temperature; K1=(incline block slope × servo electronic gear) / (screw pitch × sprocket reduction ratio × 100), K1 is the number of pulses required for unit pressure.

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