Counterweight, pressure detection system and punch die

Abstract

The application provides a balance block, a pressure detection system and a stamping die, relates to the technical field of molds, and the balance block is applied to the stamping die and comprises a balance block body and a strain gauge. The balance block body has a first end and a second end opposite in a first direction. An end face of one of the first end and the second end is provided with a first groove. The strain gauge is arranged in the first groove and is attached to a wall surface of the first groove. The balance block provided by the application is helpful for detecting die locking pressure data or blank holder force data.

Description

Technical Field

[0001] This application belongs to the field of mold technology, and more specifically, relates to a balance block, a pressure detection system, and a stamping die. Background Technology

[0002] Stamping dies typically use balance blocks to adjust the die closing clearance between the upper and lower dies. The dies can also adjust the clamping pressure of the upper and lower dies using the balance blocks. In addition, stamping dies can also use balance blocks to adjust the blank holder force of the sheet metal being stamped.

[0003] Clamping pressure and blank holder force are important data during the use of molds. Therefore, providing a balance block that helps to detect clamping pressure or blank holder force data is a technical problem that urgently needs to be solved. Utility Model Content

[0004] The purpose of this application is to provide a balance block, a pressure detection system, and a stamping die for detecting clamping pressure data or blank holder force data.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, a balance block is provided, which is applied to a stamping die and includes a balance block body and a strain gauge. The balance block body has a first end and a second end opposite to each other in a first direction. The end face of one of the first end and the second end is provided with a first groove. The strain gauge is disposed in the first groove and is in contact with the wall of the first groove.

[0007] Through the above technical solution, the balance block provided in this application can use strain gauges to convert the deformation of the balance block body into electrical signals, thereby helping to detect the pressure data on the balance block, and further helping to detect the clamping pressure data or blank holder force data. Furthermore, the strain gauge is disposed within the first groove, which protects the strain gauge and prevents it from being squeezed by the balance block body, thus affecting the measurement results and improving measurement accuracy.

[0008] Therefore, the balance block provided in this application helps to detect clamping pressure data or blank holder force data.

[0009] In some embodiments, the balance block further includes a wire harness connector and a connecting wire, the wire harness connector being disposed on one side of the balance block body in a second direction, the first direction intersecting the second direction, and the strain gauge being electrically connected to the wire harness connector via the connecting wire.

[0010] In this way, the balance block provided in this application can transmit the electrical signal generated by the strain gauge to the outside using the wire harness connector and connecting wire.

[0011] In some embodiments, the balancing block further includes an insulating layer disposed on one side in the thickness direction of the balancing block and on the side where the strain gauge is located, the insulating layer covering the strain gauge and the connecting wires.

[0012] In this way, the insulation layer can protect the strain gauge and connecting wires, and fix their positions, which helps to prevent the strain gauge and connecting wires from becoming loose. It also allows the strain gauge and connecting wires to transmit stable electrical signals outward, which helps to improve the detection accuracy.

[0013] In some embodiments, the end face of the other of the first and second ends is provided with a stress-bearing area.

[0014] In this way, the strain gauge and the stress zone are located at opposite ends of the balance block in the first direction. This avoids excessive deformation at the end where the stress zone is located, which would cause the strain gauge to be too sensitive and susceptible to interference. By placing the strain gauge at the end of the balance block opposite to the stress zone, the strain gauge can respond to smaller deformations, reducing sensitivity but helping to reduce the impact of interference, thereby improving detection accuracy.

[0015] In some embodiments, the end face of the other of the first end and the second end is provided with a second groove, the second groove being disposed around the force-bearing area; and / or, the end face of the other of the first end and the second end is further provided with a peripheral area, the peripheral area being disposed around the force-bearing area, the force-bearing area being higher than the peripheral area.

[0016] In this way, the balance block provided in this application utilizes a second groove surrounding the stress area, which helps to increase the deformation of the balance block under stress, thereby improving the sensitivity of the strain gauge. Furthermore, the balance block provided in this application places the stress area higher than the surrounding area, preventing areas outside the stress area from receiving pressure, thus further increasing the deformation of the balance block under stress and consequently improving the sensitivity of the strain gauge.

[0017] In some embodiments, the bottom wall of the first groove is provided with a deformation hole, the strain gauge is disposed adjacent to the deformation hole, and the deformation hole extends along a first direction.

[0018] In this way, the balance block provided in this application can easily deform at the deformation hole, and can have a large amount of deformation at the deformation hole, which is beneficial to improving the sensitivity of the strain gauge.

[0019] In some embodiments, there are multiple deformation holes, and the strain gauge is located between two adjacent deformation holes; and / or, the balance block body has a first connection hole on one side in the second direction, the first connection hole is used to install a wire harness connector, the first connection hole communicates with the deformation hole, and the first direction intersects the second direction.

[0020] In this way, the strain gauge is positioned between two adjacent deformation holes, allowing it to respond to larger deformations and improving its detection sensitivity. Furthermore, the first connecting hole communicates with the deformation hole, enabling the connecting wire to pass through the deformation hole and connect to the wire harness connector, thus preventing the connecting wire from being exposed and providing protection for it.

[0021] In some implementations, there are multiple strain gauges connected to form at least one Wheatstone bridge.

[0022] In this way, the balancing block provided in this application can use strain gauges to convert the deformation of the balancing block body into an electrical signal.

[0023] Secondly, this application provides a pressure detection system, which includes a signal amplifier, a data acquisition terminal, and a balance block according to any of the above embodiments. The signal amplifier is electrically connected to the strain gauge, and the data acquisition terminal is electrically connected to the signal amplifier.

[0024] In this way, the pressure detection system provided by this application can amplify and acquire the electrical signal transmitted by the balance block, thereby facilitating the measurement of more accurate results. Furthermore, the pressure detection system provided by this application has the same or similar technical effects as the balance block in any of the above embodiments, which will not be elaborated further here.

[0025] Thirdly, this application provides a stamping die, which includes: a balance block of any of the above embodiments, or a pressure detection system of the above embodiments. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A three-dimensional structural diagram of the balance block provided in an embodiment of this application;

[0028] Figure 2 A top view of the balance block provided in an embodiment of this application;

[0029] Figure 3 A side view of the balance block provided in an embodiment of this application;

[0030] Figure 4 A top view of the balance block body provided in an embodiment of this application;

[0031] Figure 5 A bottom view of the balance block body provided in an embodiment of this application;

[0032] Figure 6 A side view of the balance block body provided in an embodiment of this application;

[0033] Figure 7 For along Figure 2 Cross-sectional view of line AA in the middle;

[0034] Figure 8 For along Figure 4 Cross-sectional view of the middle BB line;

[0035] Figure 9 This is a schematic diagram of the pressure detection system provided in an embodiment of this application.

[0036] The following are the labeling elements in the figure:

[0037] 100-Balance block; 110-Balance block body; 101-Stress zone; 102-Peripheral zone; 111-First end; 112-Second end; 120-Strain gauge; 130-Wire harness connector; 1-Mounting hole; 2-First groove; 3-Second groove; 4-Deformation hole; 5-Connection hole;

[0038] 200 - Signal amplifier; 300 - Acquisition terminal. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] The balance block 100 is a key component in the stamping die. The balance block 100 is installed on the upper die and / or lower die by bolts. A shim is usually set between the balance block 100 and the die. By adding, removing or replacing the shim, the distance between the balance block 100 and the die can be adjusted, thereby adjusting the mold closing clearance between the upper and lower dies, and thus adjusting the mold clamping pressure of the upper and lower dies.

[0044] When stamping and drawing sheet metal using a stamping die, the clamping pressure can be changed by adjusting the distance between the balance block 100 and the die, thereby changing the blank holder force applied to the sheet metal, controlling the flow rate of the sheet metal, and thus achieving forming control of the stamped parts.

[0045] Among them, the blank holder force is the key factor that determines the material flow rate. If the blank holder force data can be obtained, it will be of great significance for studying the material flow rate and other properties.

[0046] Therefore, clamping pressure and blank holder force are important data in the mold use process. Providing a balance block 100 that helps to detect clamping pressure data or blank holder force data is a technical problem that urgently needs to be solved.

[0047] To address the aforementioned technical problems, embodiments of this application provide a balance block 100, a pressure detection system, and a stamping die.

[0048] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , Figure 1 This is a three-dimensional structural diagram of the balance block 100 provided in the embodiments of this application. Figure 2 This is a top view of the balance block 100 provided in an embodiment of this application. Figure 3 This is a side view of the balance block 100 provided in an embodiment of this application. Figure 4 This is a top view of the balance block body 110 provided in an embodiment of this application. Figure 5 This is a bottom view of the balance block body 110 provided in an embodiment of this application. This application provides a balance block 100, which is applied to a mold and includes a balance block body 110 and strain gauges 120.

[0049] Among them, the balance block body 110 has a first direction (such as Figure 1 The first end 111 (e.g., the upper end of the balance block body 110) and the second end 112 (e.g., the lower end of the balance block body 110) are opposite each other in the Z direction. The end face of one of the first end 111 and the second end 112 is provided with a first groove 2. The strain gauge 120 is disposed in the first groove 2 and is in contact with the wall surface of the first groove 2. For example, the first groove 2 can be disposed at the second end 112.

[0050] Through the above technical solution, the balance block 100 provided in this application embodiment can use the strain gauge 120 to convert the deformation of the balance block body 110 into an electrical signal, thereby helping to detect the pressure data of the balance block 100, and further helping to detect the clamping pressure data or the blank holder force data.

[0051] It is understandable that after the balance block body 110 deforms, the strain gauge 120 will also deform (strain). The strain gauge 120 can convert its own strain into an electrical signal, thereby converting the deformation of the balance block body 110 into an electrical signal.

[0052] For example, strain gauge 120 is connected in the detection circuit. Strain gauge 120 is a resistance strain gauge. When the resistance strain gauge undergoes mechanical deformation, its resistance value changes accordingly, thereby causing a change in the electrical signal in the detection circuit. The detection circuit is well known to those skilled in the art and will not be described in detail here.

[0053] Furthermore, the strain gauge 120 is disposed in the first groove 2, which can protect the strain gauge 120 and prevent it from being squeezed by the balance block body 110, thus affecting the measurement results and improving the measurement accuracy.

[0054] Therefore, the balance block 100 provided in this application embodiment helps to detect clamping pressure data or blank holder force data.

[0055] It is understood that the balance block 100 can be a cylindrical metal block or a cuboid metal block. That is, the shape of the balance block body 110 can be cylindrical or cuboid. Wherein, when the shape of the balance block body 110 is cylindrical, the first direction can be the axial direction of the balance block body 110; when the shape of the balance block body 110 is cylindrical, the first direction can be the height direction of the balance block body 110.

[0056] In some embodiments, please refer to the following: Figure 2 , Figure 3 and Figure 5The balance block 100 also includes a wire harness connector 130 and a connecting wire. The wire harness connector 130 is disposed on one side of the balance block body 110 in the second direction, where the first direction intersects the second direction. The strain gauge 120 is electrically connected to the wire harness connector 130 via the connecting wire.

[0057] It is understood that when the shape of the balance block body 110 is cylindrical, the second direction can be the radial direction of the balance block body 110, that is, the wire harness connector 130 is disposed on the outer periphery of the balance block body 110; when the shape of the balance block body 110 is cylindrical, the second direction can be the length direction or the width direction of the balance block body 110, that is, the wire harness connector 130 is disposed on one side of the balance block body 110 in the length direction or the width direction.

[0058] Among them, the strain gauge 120 can transmit the generated electrical signal to the wire harness connector 130 through the connecting wire.

[0059] In this way, the balance block 100 provided in this application embodiment can transmit the electrical signal generated by the strain gauge 120 to the outside using the wire harness connector 130 and the connecting wire.

[0060] Optionally, the balance block body 110 may be provided with mounting holes 1, through which the balance block body 110 may be mounted onto the mold.

[0061] In some embodiments, please refer to Figure 5 There are multiple strain gauges 120, and multiple strain gauges 120 are connected to form at least one Wheatstone bridge.

[0062] As is understandable, a Wheatstone bridge is a bridge circuit composed of four resistors, which are called the bridge arms of the bridge. The Wheatstone bridge uses the change in resistance to measure the change in physical quantities (such as mechanical deformation). The microcontroller collects the voltage across the variable resistor and processes it to calculate the change in the corresponding physical quantity.

[0063] Unbalanced bridges are generally used to measure minute changes in resistance. For example, a resistance strain gauge (composed of a resistance wire made into a grid and pasted between two layers of thin paper or plastic film) is fixed to an object (balance block body 110). When the object deforms, the strain gauge 120 also deforms (strains), and the resistance of the strain gauge 120 changes from Rx when the bridge is balanced to Rx + ΔR. At this time, the current Ig passing through the galvanometer will also change. ΔR can be measured based on the relationship between Ig and ΔR, and then the deformation of the object can be calculated from the relationship between ΔR and the deformation of the object. Finally, the external force on the object can be calculated based on the deformation of the object. Therefore, the balance block 100 provided in this embodiment can use the electrical signal generated by the strain gauge 120 to calculate the pressure on the balance block body 110, thereby measuring the clamping pressure data or the blank holder force data.

[0064] In this way, the balance block 100 provided in this application embodiment can use the strain gauge 120 to convert the deformation of the balance block body 110 into an electrical signal, which is beneficial for detecting clamping pressure data or blank holder force data.

[0065] In some embodiments, the balance block 100 further includes an insulating layer disposed on one side of the balance block 100 in the thickness direction and on the side where the strain gauge 120 is located, and the insulating layer covers the strain gauge 120 and the connecting wires.

[0066] The balance block 100 provided in this application embodiment can use an insulating layer to protect the strain gauge 120 and the connecting wires, which helps to prevent the strain gauge 120 and the connecting wires from being corroded by external factors.

[0067] It is understandable that when the strain gauge 120 changes position, it will generate strain, which will produce interfering electrical signals. Furthermore, vibration of the connecting wires may also cause strain in the strain gauge 120.

[0068] Therefore, the balance block 100 provided in this application embodiment can fix the position of the strain gauge 120 and the connecting wire, which helps to prevent the strain gauge 120 and the connecting wire from becoming loose, and allows the strain gauge 120 and the connecting wire to transmit stable electrical signals outward, which helps to improve the detection accuracy.

[0069] Understandably, to prevent positional changes in the strain gauge 120, the strain gauge 120 is welded to the balance block body 110, and the strain gauge 120 and the wire harness junction are also welded. The strain gauge 120 and the wire harness junction can be connected by soldering.

[0070] Please continue reading. Figure 4 and Figure 5 and combined Figure 6 , Figure 7 and Figure 8 , Figure 6 This is a side view of the balance block body 110 provided in an embodiment of this application. Figure 7 For along Figure 2 Cross-sectional view of line AA in the middle. Figure 8 For along Figure 4 Cross-sectional view of the middle BB line. In some embodiments, the end face of the other of the first end 111 and the second end 112 is provided with a stress-bearing area 101. For example, the first end 111 (upper end) of the balance block body 110 is provided with a stress-bearing area 101.

[0071] It is understandable that a large pressure needs to be applied in the pressurization mold, for example, the applied pressure is usually above 10 tons (t). The end of the balance block body 110 subjected to force will produce a large deformation, the sensitivity of the strain gauge 120 will increase, and it will cause a large interference to the strain gauge 120.

[0072] In this configuration, the strain gauge 120 and the stress region 101 are located at opposite ends of the balance block 100 in the first direction. This avoids excessive deformation at the end where the stress region 101 is located, which could lead to excessively high sensitivity of the strain gauge 120 and thus prevent significant interference. In other words, by positioning the strain gauge 120 at the end of the balance block 100 opposite to the stress region 101, the strain gauge 120 can respond to smaller deformations, reducing sensitivity but mitigating interference and thus improving detection accuracy.

[0073] Please continue reading. Figure 6 , Figure 7 and Figure 8 In some embodiments, the end face of the other of the first end 111 and the second end 112 is provided with a second groove 3, which surrounds the force-bearing area 101. For example, the first end 111 (upper end) of the balance block body 110 is provided with a second groove 3.

[0074] It is understood that the balance block 100 provided in this application embodiment uses the second groove 3 to surround the force-bearing area 101. After the force-bearing area 101 is subjected to force, the area on the outer periphery of the second groove 3 is different from the external force on the force-bearing area 101. A large relative deformation will be generated between the area on the outer periphery of the second groove 3 and the force-bearing area 101, which is beneficial to increase the deformation of the balance block 100 after being subjected to force, and thus beneficial to improve the sensitivity of the strain gauge 120.

[0075] Optionally, the end face of the other of the first end 111 and the second end 112 is further provided with a peripheral area 102, which surrounds the force-bearing area 101 and the force-bearing area 101 is higher than the peripheral area 102.

[0076] In this way, the balance block 100 provided in this application embodiment makes the stress area 101 higher than the surrounding area 102, which can prevent the area outside the stress area 101 from receiving pressure, thereby increasing the deformation of the balance block 100 after being subjected to force, and thus improving the sensitivity of the strain gauge 120.

[0077] Please continue reading. Figure 5 , Figure 7 and Figure 8 In some embodiments, the bottom wall of the first groove 2 is provided with a deformation hole 4, and the strain gauge 120 is disposed adjacent to the deformation hole 4, and the deformation hole 4 extends along the first direction.

[0078] It is understood that the deformation hole 4 has a cavity, and the material of the balance block body 110 near the deformation hole 4 is prone to deforming into the cavity of the deformation hole 4. In this way, the balance block 100 provided in this embodiment of the application can easily deform at the deformation hole 4, and can have a large amount of deformation at the deformation hole 4, which is beneficial to improving the sensitivity of the strain gauge 120.

[0079] Please see Figure 5 In some embodiments, there are multiple deformation holes 4, and the strain gauge 120 is located between two adjacent deformation holes 4. In this way, the position of the strain gauge 120 can deform towards the two adjacent deformation holes 4 from different directions. The strain gauge 120 is positioned between two adjacent deformation holes 4, and the strain gauge 120 can respond to larger deformations, which helps to improve the detection sensitivity of the strain gauge 120.

[0080] In this case, the strain gauge 120 responds to a large deformation by generating a large strain after the balance block body 110 undergoes a large deformation.

[0081] Optionally, the balance block body 110 is provided with a first connection hole 5 on one side in the second direction. The first connection hole 5 is used to install the wire harness connector 130. The first connection hole 5 is connected to the deformation hole 4, and the first direction intersects with the second direction.

[0082] In this way, the first connecting hole 5 is connected to the deformation hole 4, allowing the connecting wire to pass through the deformation hole 4 and the first connecting hole 5 to connect with the wire harness connector 130, thereby preventing the connecting wire from being exposed and thus protecting it. Furthermore, the connection of the connecting wire through the deformation hole 4 and the first connecting hole 5 to the wire harness connector 130 prevents the connecting wire from being affected by external forces and causing positional changes, thereby preventing the connecting wire from affecting the strain gauge 120.

[0083] Please see Figure 9 , Figure 9 This is a schematic diagram of the pressure detection system provided in an embodiment of this application. This application also provides a pressure detection system, which includes a signal amplifier 200, a data acquisition terminal 300, and a balance block 100 as described in any of the above embodiments. The signal amplifier 200 is electrically connected to the strain gauge 120, and the data acquisition terminal 300 is electrically connected to the signal amplifier 200.

[0084] In this way, the pressure detection system provided in this application embodiment can amplify and collect the electrical signal transmitted by the balance block 100, thereby facilitating the measurement of more accurate results.

[0085] Furthermore, the pressure detection system provided in this application embodiment has the same or similar technical effects as the balance block 100 in any of the above embodiments, and will not be described again here.

[0086] It is understandable that the acquisition terminal 300 can be the HN300BMIP model from Hairong Intelligent, and the signal amplifier 200 can be the AMP-9-6D model from Keprui. The signal amplifier 200 can integrate a signal conversion module, enabling signal conversion without the need for an additional signal converter.

[0087] This application also provides a stamping die, which includes: the balance block 100 of any of the above embodiments, or the pressure detection system of any of the above embodiments. Furthermore, the stamping die provided in this application has the same or similar technical effects as the balance block 100 or the pressure detection system of any of the above embodiments, and will not be described in detail here.

[0088] When using the balance block 100 provided in this embodiment, the balance block 100 is installed on the mold, the wire harness connector 130 is connected to the signal amplifier 200, and the acquisition terminal 300 can be connected to the computer terminal, so that the data signal of the drawing process can be viewed through the computer terminal.

[0089] The performance specifications of the balance block 100 are illustrated below: the rated load of the balance block 100 is greater than or equal to 20 tons, the rated output range is 1.2~2.0mV / V, the zero-point balance is ±1.0%, the comprehensive error is ±0.5%, the signal output is RS485, the insulation resistance is greater than or equal to 5000MΩ (50VDC), the material of the balance block body 110 can be alloy steel, the strength of the balance block body 110 is greater than or equal to the strength of No. 45 steel after quenching, the service life of the balance block 100 is greater than or equal to 1,000,000 cycles, the installation accuracy of the balance block 100 is ±0.2mm, and the operating temperature range of the balance block 100 is -40℃~+50℃, that is, the operating temperature range of the balance block 100 is greater than or equal to -40℃ and less than or equal to 50℃.

[0090] The above description is merely a specific embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A balance block, applied to a stamping die, characterized in that, include: The balance block body has a first end and a second end opposite to each other in a first direction, and the end face of one of the first end and the second end is provided with a first groove. A strain gauge is disposed in the first groove and is in contact with the wall of the first groove.

2. The balance block as described in claim 1, characterized in that, The balance block also includes: A wire harness connector is disposed on one side of the balance block body in a second direction, where the first direction intersects the second direction; A connecting wire is used to electrically connect the strain gauge to the wire harness connector.

3. The balance block as described in claim 2, characterized in that, The balance block further includes an insulating layer disposed on one side of the balance block in the thickness direction and on the side where the strain gauge is located. The insulating layer covers the strain gauge and the connecting wire.

4. The balance block as described in claim 1, characterized in that, The end face of the other of the first end and the second end is provided with a stress-bearing area.

5. The balance block as described in claim 4, characterized in that, The end face of the other of the first end and the second end is provided with a second groove, and the second groove is arranged around the force-bearing area; And / or, the end face of the other of the first end and the second end is further provided with a peripheral area, the peripheral area being disposed around the force-bearing area, and the force-bearing area being higher than the peripheral area.

6. The balance block as described in any one of claims 1 to 5, characterized in that, The bottom wall of the first groove is provided with a deformation hole, and the strain gauge is disposed adjacent to the deformation hole, which extends along the first direction.

7. The balance block as described in claim 6, characterized in that, There are multiple deformation holes, and the strain gauge is located between two adjacent deformation holes; And / or, the balance block body has a first connection hole on one side in the second direction, the first connection hole is used to install a wire harness connector, the first connection hole communicates with the deformation hole, and the first direction intersects the second direction.

8. The balance block as described in any one of claims 1 to 5, characterized in that, There are multiple strain gauges, and the multiple strain gauges are connected to form at least one Wheatstone bridge.

9. A pressure detection system, characterized in that, The pressure detection system includes: The balance block according to any one of claims 1 to 8, A signal amplifier is electrically connected to the strain gauge; The acquisition terminal is electrically connected to the signal amplifier.

10. A stamping die, characterized in that, include: The balance block according to any one of claims 1 to 8, or the pressure detection system according to claim 9.

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