Diaphragm punch forming system and control method

Abstract

The invention provides a diaphragm punch forming system and a control method, the system comprises a punch forming die and a transmission control assembly, the punch forming die comprises a displacement sensor group and a speed sensor group, the displacement sensor group is used for collecting distance data, and the speed sensor group is used for collecting speed data of a punch; the transmission control assembly comprises a stamping part and a controller, and when the controller responds to contact between the blank holder and the strip and compresses the strip, a first displacement and a first speed are obtained, and an instruction is sent to the stamping part according to the first displacement and / or the first speed, so that the descending speed of the stamping part is adjusted to be a first preset speed; acquiring a second displacement; and if the second displacement is the preset displacement, an instruction is sent to the stamping part to control the speed of the stamping part to be reduced to the initial speed. According to the method, displacement, speed and stamping force data in the stamping process are collected, the transmission control assembly controls the stamping process through displacement, speed and stamping force, and the problem that the quality of the diaphragm is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of diaphragm manufacturing, and in particular to a diaphragm stamping forming system and a control method. Background Art

[0002] The diaphragm is one of the components of the pressure sensor, which is used to sense pressure changes and convert these changes into electrical signals. The design, material and thickness of the diaphragm will directly affect the performance of the sensor, including sensitivity, response speed, measurement range, temperature stability, etc. There are many types of diaphragms, such as metal diaphragms, ceramic diaphragms, diffused silicon diaphragms, etc.

[0003] The manufacturing process of the diaphragm can vary depending on the materials and techniques used. For metal diaphragms, it includes processes such as stamping, heat treatment, and surface treatment. The stamping process of the diaphragm is to use a mold to stamp the metal sheet into the required shape and size. This process is an important factor affecting the quality of the diaphragm. Among them, the punch is used in the stamping die to apply a punching force to the material to deform it and form it into the desired shape.

[0004] However, the relationship between the punch stroke, speed and punching force process parameters has not been accurately analyzed, studied and calculated, and the stamping process cannot be accurately controlled by controlling the punch stroke and speed, resulting in poor diaphragm quality. Summary of the invention

[0005] The present application provides a diaphragm stamping system and a control method to solve the problem of poor diaphragm quality.

[0006] In a first aspect, the present application provides a diaphragm stamping system, comprising:

[0007] Stamping die, used for stamping diaphragms;

[0008] A transmission control assembly connected to the stamping die, comprising a stamping part and a controller;

[0009] The stamping part is used to provide stamping force for the stamping die;

[0010] The stamping forming die comprises: a punch, a guide column and a blank holder, wherein the guide column passes through the punch and extends to the blank holder;

[0011] A displacement sensor group, arranged on the blank holder ring, for collecting distance data between the punch and the blank holder ring;

[0012] A speed sensor group is arranged on the punch near the blank holder and is used to collect speed data of the punch;

[0013] The controller is configured to:

[0014] In response to the blank holder being in contact with the strip and pressing it, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by the displacement sensor group, and the first speed is speed data acquired by the speed sensor group;

[0015] According to the first displacement and / or the first speed, sending an instruction to the stamping part to adjust the descending speed of the stamping part to a first preset speed;

[0016] Get the second displacement;

[0017] If the second displacement is a preset displacement, a command is sent to the stamping part to control the speed of the stamping part to drop to an initial speed.

[0018] In some feasible embodiments, the stamping die further comprises:

[0019] A connecting member, comprising a first connecting portion and a fixing portion, wherein one end of the first connecting portion is connected to the stamping portion, and the other end of the first connecting portion is connected to the fixing portion, and the fixing portion comprises at least a first fixing hole and a second fixing hole;

[0020] The punch has a T-shaped cross-section and includes a second connecting portion and a stamping portion. One end of the second connecting portion is connected to the fixing portion, and the other end of the second connecting portion is connected to the stamping portion. The second connecting portion includes at least a third fixing hole and a fourth fixing hole.

[0021] In some feasible embodiments, the guide column passes through the first fixing hole and the third fixing hole, and when the punching part moves in a first direction, one end of the guide column is close to one end of the first fixing hole, and the first direction is a movement direction close to the punch;

[0022] The stamping die also includes a connecting rod, and the connecting rod passes through the second fixing hole and the fourth fixing hole.

[0023] In some feasible embodiments, the blank holder includes at least a fifth fixing hole, and the guide column passes through the first fixing hole and the third fixing hole and extends into the fifth fixing hole;

[0024] The guide column is provided with a return spring, and the return spring is located between the second connecting portion and the blank holder;

[0025] The stamping die also includes a soft die, which is arranged at one end of the blank holder away from the punch, and the strip is placed between the soft die and the blank holder.

[0026] In some feasible embodiments, the displacement sensor group includes at least a first displacement sensor and a second displacement sensor;

[0027] The controller sends an instruction to the punch according to the first displacement and / or the first speed to adjust the descending speed of the punch to a first preset speed, and is specifically configured as follows:

[0028] Calculating a displacement standard deviation based on the displacement data collected by the first displacement sensor and the displacement data collected by the second displacement sensor;

[0029] If the displacement standard deviation is less than or equal to the displacement standard deviation threshold, calculating the displacement average value according to the displacement data collected by the first displacement sensor and the displacement data collected by the second displacement sensor;

[0030] According to the first displacement, a feedback signal is sent to the punch to adjust the descending speed of the punch to a first preset speed, and the feedback signal is an average value of the displacement.

[0031] In some feasible embodiments, the speed sensor group includes at least a first speed sensor and a second speed sensor;

[0032] The controller sends an instruction to the punch according to the first displacement and / or the first speed to adjust the descending speed of the punch to a first preset speed, and is specifically configured as follows:

[0033] Calculating a speed standard deviation based on the speed data collected by the first speed sensor and the speed data collected by the second speed sensor;

[0034] If the speed standard deviation is less than or equal to the speed standard deviation threshold, calculating a speed average value according to the speed data collected by the first speed sensor and the speed data collected by the second speed sensor;

[0035] According to the first displacement and / or the first speed, a feedback signal is sent to the punch to adjust the descending speed of the punch to a first preset speed, and the feedback signal is an average speed value and / or an average displacement value.

[0036] In some feasible embodiments, the transmission control assembly further includes a pressure sensor group for collecting pressure data of the stamping process;

[0037] The controller is also configured to:

[0038] According to the pressure data, a stamping stage is obtained, wherein the stamping stage includes a contact stage, a forming stage and an unloading stage;

[0039] Acquiring multiple sections of control data, wherein the multiple sections of control data include contact stage data, forming stage data, and unloading stage data;

[0040] According to the stamping stage, an instruction is sent to the stamping part to adjust the descending speed of the stamping part according to multiple sections of control data.

[0041] In some feasible embodiments, a fifth fixing hole is provided on the stamping portion; the displacement sensor group further includes a third displacement sensor, and the third displacement sensor is provided in the fifth fixing hole;

[0042] The controller is also configured to:

[0043] Obtaining a third displacement, wherein the third displacement is a matching clearance between the punch and the blank holder;

[0044] If the third displacement is greater than the preset tolerance, a command is sent to the stamping part to adjust the increasing speed of the stamping part to a second preset speed.

[0045] In a second aspect, the present application provides a control method for a diaphragm stamping system, comprising:

[0046] In response to the blank holder contacting and pressing the strip, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by the displacement sensor group, and the first speed is speed data acquired by the speed sensor group;

[0047] According to the first displacement and / or the first speed, sending an instruction to the stamping part to adjust the descending speed of the stamping part to a first preset speed;

[0048] Get the second displacement;

[0049] If the second displacement is a preset displacement, a command is sent to the stamping part to control the speed of the stamping part to drop to an initial speed.

[0050] It can be seen from the above technical scheme that the present application provides a diaphragm stamping system and control method, the system comprising: a stamping die and a transmission control component, the stamping die is used to stamp a diaphragm; the transmission control component is connected to the stamping die, including a stamping part and a controller; the stamping part is used to provide a stamping force for the stamping die; the stamping die comprises a displacement sensor group and a speed sensor group, the displacement sensor group is arranged on the blank holder ring, and is used to collect the distance data between the punch and the blank holder ring; the speed sensor group is arranged on the punch close to the blank holder ring, and is used to collect the speed data of the punch; the controller obtains a first displacement and a first speed in response to the blank holder ring contacting and pressing the strip, the first displacement is the displacement data collected by the displacement sensor group, and the first speed is the speed data collected by the speed sensor group; according to the first displacement and / or the first speed, an instruction is sent to the stamping part to adjust the descending speed of the stamping part to a first preset speed; a second displacement is obtained; if the second displacement is a preset displacement, an instruction is sent to the stamping part to control the speed of the stamping part to drop to an initial speed. The method can collect displacement, speed and punching force data in the punching process by arranging a displacement sensor group, a speed sensor group and a pressure sensor group on the mold. The transmission control component accurately controls the punching process through the displacement, speed and punching force data to solve the problem of poor diaphragm quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0052] Figure 1 A schematic diagram of the control process of the diaphragm stamping system provided in an embodiment of the present application;

[0053] Figure 2 A front view of the stamping die provided in the embodiment of the present application;

[0054] Figure 3 A cross-sectional view of a stamping die provided in an embodiment of the present application;

[0055] Figure 4 A side view of a stamping die provided in an embodiment of the present application;

[0056] Figure 5 A top view of a stamping die provided in an embodiment of the present application;

[0057] Figure 6 A functional relationship diagram of punch formation and punching speed provided in an embodiment of the present application.

[0058] A diagram showing:

[0059] 110 - punch, 111 - second connecting part, 112 - stamping part, 120 - guide column, 121 - return spring, 130 - pressure ring, 140 - connecting piece, 141 - first connecting part, 142 - fixing part, 150 - connecting rod, 160 - soft mold, 200 - displacement sensor group, 300 - speed sensor group. DETAILED DESCRIPTION

[0060] The following embodiments are described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following embodiments do not represent all implementations consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims.

[0061] The thickness of the diaphragm is between 25 and 30 μm, which makes it very vulnerable to damage during the stamping process, such as cracks and tears. Therefore, the control of parameters such as pressure, speed, and stroke during the stamping process requires high standards. As an elastic element in the core of the pressure sensor, the diaphragm is required to have good elasticity and recovery. This requires that the stamping process must not only ensure the shape and dimensional accuracy of the diaphragm, but also avoid damage to its elastic properties.

[0062] Therefore, for the stamping process of the diaphragm, it is necessary to accurately control the punch, which is used in the stamping die to apply pressure to the material to deform and form it into the desired shape. However, the punch stroke, speed and punching force process parameters were not accurately calculated, and the stamping process could not be accurately controlled by controlling the punch stroke, speed and punching force, resulting in poor quality and instability of the diaphragm.

[0063] Some embodiments of the present application provide a diaphragm stamping system, see Figure 1-Figure 5 ,include:

[0064] The stamping die is used to stamp the membrane and form it into the desired shape. The stamping die includes: a punch 110, a guide column 120 and a blank holder 130, wherein the portion of the punch 110 in contact with the strip is used to stamp the membrane, the guide column 120: penetrates the punch 110 and extends to the blank holder 130, ensuring the straight-line movement of the punch 110 to prevent deflection, the blank holder 130 is fixed on the die, used to fix the strip and ensure its stability during the stamping process, and if the strip is a coil, the coil will have an initial bend, and the blank holder can also be used to fix the strip and make it flat.

[0065] It can be understood that the surface of the punch 110 close to the blank holder 130 is provided with a corrugated shape with extremely high dimensional accuracy and a relatively sharp edge, which is conducive to cutting off the diaphragm from the strip during stamping.

[0066] In some embodiments, the stamping die further includes a connector 140, which includes a first connector 141 and a fixing portion 142, wherein one end of the first connector 141 is connected to the stamping portion 112, and the other end of the first connector 141 is connected to the fixing portion 142. The cross-sectional shape of the punch 110 is T-shaped, and the punch 110 includes a second connector 111 and a stamping portion 112, wherein one end of the second connector 111 is connected to the fixing portion 142, and the other end of the second connector 111 is connected to the stamping portion 112.

[0067] In order to provide a stable punching force to the punch 110, the fixing portion 142 and the second connecting portion 111 have the same shape and the same size of the contact surface. For example, the fixing portion 142 and the second connecting portion 111 are both cylindrical structures.

[0068] The fixing holes on the fixing portion 142 and the fixing holes on the second connecting portion 111 are for fixing the guide post 120, and the number of the fixing holes can be consistent with the number of the guide posts 120. For example, if the number of the guide posts 120 is three, then the number of the fixing holes is also three. In some embodiments, the stamping mold further includes a connecting rod 150, and the connecting rod 150 is used to fix the connector 140 and the punch 110, and is also fixed through the fixing holes, and its channel is arranged on the fixing portion 142 and the second connecting portion 111. In some embodiments, the fixing portion 142 includes at least a first fixing hole and a second fixing hole, and the second connecting portion 111 includes at least a third fixing hole and a fourth fixing hole, wherein the first fixing hole and the third fixing hole are a group, correspondingly arranged, and are used to fix the guide post 120, and the second fixing hole and the fourth fixing hole are a group, correspondingly arranged, and are used to fix the connecting rod 150.

[0069] Exemplarily, the number of the guide posts 120 and the number of the connecting rods 150 are both three, and then the number of the first fixing holes and the number of the third fixing holes are both three. Similarly, the number of the second fixing holes and the number of the fourth fixing holes are both three.

[0070] In some embodiments, the pressure ring 130 includes a fifth fixing hole, and the guide column 120 passes through the first fixing hole and the third fixing hole and extends into the fifth fixing hole. Since the connecting member 140 drives the punch 110 to move up and down, a return spring 121 is provided on the guide column 120, and the return spring 121 is located between the second connecting portion 111 and the pressure ring 130. During the stamping process, the spring is compressed. When the stamping portion 112 moves in the first direction, the first direction is the movement direction close to the punch 110, and one end of the guide column 120 is close to one end of the first fixing hole. It can be understood that due to the movement of the connecting member 140, in order to accommodate the guide column 120, the first fixing hole is provided with an accommodating space, and in order to fix the guide column 120, a fixing block or other fixable structure is also provided on the first fixing hole.

[0071] The stamping mold also includes a soft mold 160, which is arranged at one end of the pressure ring 130 away from the punch 110. The strip is placed between the soft mold 160 and the pressure ring 130. The pressure ring 130 fixes the strip to ensure its stability during the stamping process. The membrane material to be stamped is placed on the strip. The punch 110 moves downward under the drive of the connecting piece 140, gradually approaches the strip, and performs the stamping process. After the stamping is completed, the reset spring 121 helps the punch 110 to reset and return the punch 110 to its initial position.

[0072] In some embodiments, the diaphragm stamping die is not equipped with sensors, and the stamping process cannot be accurately controlled through control. In this embodiment, a displacement sensor group 200 and a speed sensor group 300 are set. The displacement sensor group 200 is set on the blank holder 130 to collect the distance data between the punch 110 and the blank holder 130. In some embodiments, the displacement sensor group 200 includes at least a first displacement sensor and a second displacement sensor. Exemplarily, the displacement sensor group 200 includes three displacement sensors, namely a first displacement sensor, a second displacement sensor and a third displacement sensor. Since the blank holder 130 is a structure with a circular cross-sectional shape, the three displacement sensors can be evenly distributed on the blank holder 130, that is, the angle between every two displacement sensors is 120°.

[0073] The speed sensor group 300 is arranged on the punch 110 close to the blank holder 130, and is used to collect speed data of the punch 110. In some embodiments, the speed sensor group 300 includes at least a first speed sensor and a second speed sensor. Similar to the displacement sensor group 200, the speed sensor also includes three speed sensors, namely a first speed sensor, a second speed sensor and a third speed sensor. Since the punch 110 is a circular structure in cross-section, the three speed sensors can be evenly distributed on the blank holder 130, that is, the angle between every two speed sensors is 120°.

[0074] The punch head 110 is provided with power, and also includes a transmission control assembly connected to the stamping die, providing power to the stamping die and controlling the stamping process. The transmission control assembly includes a stamping part 112 and a controller. The stamping part 112 provides a component of the stamping force, such as a hydraulic cylinder and a pneumatic cylinder. The controller is used to control the entire system, receive sensor feedback and send control instructions.

[0075] The controller is configured to:

[0076] In response to the blank holder 130 contacting and pressing the strip, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by the displacement sensor group 200, and the first speed is speed data acquired by the speed sensor group 300;

[0077] According to the first displacement and / or the first speed, a command is sent to the stamping part 112 to adjust the descending speed of the stamping part 112 to a first preset speed;

[0078] Get the second displacement;

[0079] If the second displacement is the preset displacement, a command is sent to the punching part 112 to control the speed of the punching part 112 to drop to the initial speed.

[0080] When the blank holder 130 contacts and presses the strip, it is in the initial contact stage. The distance data between the punch 110 and the blank holder 130 collected by the displacement sensor group 200 is the first displacement. This first displacement is a slight change in the distance between the punch 110 and the blank holder 130. The speed sensor group 300 collects the speed data of the punch 110, that is, the first speed. According to the first displacement and / or the first speed, an instruction is sent to the stamping part 112 to adjust the descending speed of the stamping part 112 to the first preset speed (for example, 2 mm / ms) to ensure smooth contact.

[0081] When the blank holder 130 contacts the strip and before it is pressed, the initial reading of the displacement sensor is the initial distance l between the punch 110 and the blank holder 130, and the reading of the speed sensor is 0. Figure 6 As shown, through research, it is found that the diaphragm forming effect has a functional relationship with the punch 110 stroke and punching speed process parameters.

[0082] It can be understood that during the stamping process, the displacement sensor group 200 and the speed sensor group 300 collect data in real time, namely, the second displacement and the second speed. During the process of displacement sensor collection, if the second displacement reaches the preset displacement, wherein the preset displacement is ls, wherein l is the initial distance between the punch 110 and the blank holder 130, and s is the stroke of the punch 110, the second displacement is used to determine whether the punch 110 has reached the preset displacement, thereby deciding whether to adjust the speed of the stamping part 112, indicating that the punch 110 has reached the optimal forming depth. At this time, the diaphragm falls off the strip, and sends an instruction to the stamping part 112 to control the speed of the stamping part 112 to drop to the initial speed, wherein the initial speed is 0, and it is slowly lifted up at a certain speed, and the formed diaphragm can be taken out.

[0083] The controller can quickly respond to the signal that the blank holder is in contact with the strip and is pressing it, and adjust the descent speed of the punch in time to ensure the efficiency of the forming process. By calculating the preset displacement ls, the speed of the punch is adjusted when it reaches the forming depth to avoid deformation or damage of the material due to excessive speed. Through progressive forming and low-speed contact, it can ensure that the diaphragm is evenly stressed during the forming process to avoid rupture or deformation caused by local stress concentration.

[0084] In some embodiments, the controller sends an instruction to the punch 110 according to the first displacement and / or the first speed to adjust the descending speed of the punch 110 to the first preset speed, which is specifically configured as follows:

[0085] Taking the displacement sensor group 200 including three displacement sensors and the speed sensor group 300 including three speed sensors as an example, the displacement standard deviation is calculated according to the displacement data collected by the displacement sensor group 200, as shown in the following formula:

[0086]

[0087] Among them, X i is the displacement data collected by three displacement sensors, is the average value of displacement data, n is the number of displacement sensors, n=3.

[0088] The standard deviation is used to measure whether the detection data is valid. If the displacement standard deviation is less than or equal to the displacement standard deviation threshold, the detection data is valid. The displacement average value is calculated based on the displacement data collected by the first displacement sensor and the displacement data collected by the second displacement sensor, as shown in the following formula:

[0089]

[0090] According to the first displacement, a feedback signal is sent to the punch 110 , wherein the feedback signal is an average value of the displacement, thereby adjusting the descending speed of the punch 110 to the first preset speed.

[0091] Similarly, for the speed sensor, in some embodiments, the speed standard deviation is calculated based on the speed data collected by the first speed sensor and the speed data collected by the second speed sensor. If the speed standard deviation is less than or equal to the speed standard deviation threshold, the speed average is calculated based on the speed data collected by the first speed sensor and the speed data collected by the second speed sensor. Based on the first displacement and / or the first speed, a feedback signal is sent to the punch 110, and the feedback signal is the speed average and / or the displacement average, so as to adjust the descent speed of the punch 110 to the first preset speed.

[0092] The speed standard deviation is calculated based on the speed data collected by the speed sensor group 300, as shown in the following formula:

[0093]

[0094] Among them, X i It is the speed data collected by three speed sensors. is the average value of the speed data, n is the number of speed sensors, n=3.

[0095] According to the speed data collected by the three speed sensors, the average speed is calculated, see the following formula:

[0096]

[0097] According to the first speed, a feedback signal is sent to the punch 110, and the feedback signal is an average value of the speed, so as to adjust the descending speed of the punch 110 to the first preset speed.

[0098] Among them, for the feedback signal, when the feedback signal is the average speed value or the average displacement value, the displacement sensor and the speed sensor feedback signals respectively, and when the feedback signal is the average speed value and the average displacement value, the displacement sensor and the speed sensor feedback signals simultaneously.

[0099] In order to further accurately control the stamping process, in some embodiments, a pressure sensor group is also provided on the transmission control assembly, and the pressure sensor group is used to collect pressure data of the stamping process;

[0100] The controller is also configured to:

[0101] According to the pressure data, the stamping stage is obtained;

[0102] Get multiple segments of control data;

[0103] According to the stamping stage, a command is sent to the stamping part 112 to adjust the descending speed of the stamping part 112 according to the multiple control data.

[0104] The stamping stage includes a contact stage, a forming stage and an unloading stage. The contact stage is a stage in which the punch 110 contacts and presses the strip material. The forming stage is a stage in which the punch 110 continues to press down to form the strip material into a desired shape. The unloading stage is a stage in which the punch 110 gradually releases pressure and retreats after the stamping is completed. The multi-segment control data includes contact stage data, forming stage data and unloading stage data, and the data may include speed data.

[0105] When in the contact stage, the pressure detected by the pressure sensor group exceeds the pressure threshold of the contact stage, and the descending speed of the punch 110 is adjusted to the target speed of the contact stage. When in the forming stage, the pressure detected by the pressure sensor group exceeds the pressure threshold of the forming stage, and the descending speed of the punch 110 is adjusted to the target speed of the forming stage. When in the unloading stage, the pressure detected by the pressure sensor group is lower than the pressure threshold of the unloading stage, and the descending speed of the punch 110 is adjusted to the target speed of the unloading stage.

[0106] Similarly, in some embodiments, the pressure sensor group includes three pressure sensors, namely a first pressure sensor, a second pressure sensor, and a third pressure sensor. The pressure standard deviation is calculated based on the pressure data collected by the pressure sensor group. If the pressure standard deviation is less than or equal to the pressure standard deviation threshold, the pressure average value is calculated based on the pressure data collected by the pressure sensor group. Based on the first displacement and / or the first speed and / or the first pressure, a feedback signal is sent to the punch 110, and the feedback signal is the speed average value and / or the displacement average value and / or the first pressure, so as to adjust the descent speed of the punch 110 to the first preset speed.

[0107] According to the pressure data collected by the pressure sensor group, the pressure standard deviation is calculated as follows:

[0108]

[0109] Among them, X i It is the pressure data collected by three pressure sensors. is the average value of the pressure data, n is the number of pressure sensors, n=3.

[0110] According to the pressure data collected by the three pressure sensors, the average pressure is calculated as follows:

[0111]

[0112] According to the first pressure, a feedback signal is sent to the punch 110, and the feedback signal is an average value of the pressure, so as to adjust the descending speed of the punch 110 to a first preset speed.

[0113] The dimensional tolerance of the punch 110 and the blank holder 130 also affects the quality of diaphragm forming. The clearance between the axial holes of the punch 110 and the blank holder 130 must ensure that the punch 110 can smoothly extend through the blank holder 130 without resistance, while at the same time making the clearance as small as possible to ensure that most of the force on the strip during the diaphragm punching and forming is shear force, greatly reducing the proportion of tensile force. The tensile force will cause wrinkles on the edges of the diaphragm after forming, resulting in reduced forming quality.

[0114] Therefore, in some embodiments, a fifth fixing hole is provided on the stamping portion 112, and the displacement sensor group 200 also includes a third displacement sensor, which is arranged in the fifth fixing hole so as to be able to measure the displacement change of the punch 110 relative to the edge of the hole of the blank holder 130 during movement.

[0115] The controller is also configured to:

[0116] Obtaining a third displacement, where the third displacement is a matching clearance between the punch 110 and the blank holder 130;

[0117] If the third displacement is greater than the preset tolerance, a command is sent to the stamping part 112 to adjust the increasing speed of the stamping part 112 to a second preset speed.

[0118] The third displacement sensor converts the measured displacement change into an electrical signal output, and the electrical signal can be transmitted to the controller by wire or wireless means. The controller receives the electrical signal output by the third displacement sensor and performs amplification, filtering and linearization processing to improve the accuracy and stability of the signal. The controller compares the processed displacement signal with the preset tolerance range to determine whether the matching clearance between the punch 110 and the blank holder 130 exceeds the preset range.

[0119] When the control system detects that the clearance between the punch 110 and the blank holder 130 exceeds the preset range, the speed of the punch 110 is preliminarily adjusted according to the preset algorithm and rules. If the clearance is too large, the punching force and speed are increased to make the punch 110 obtain a larger momentum, increase the impact and shear force ratio on the strip; if the clearance is too small, the speed is reduced to ensure passability and avoid jamming.

[0120] In some embodiments, the speed of the stamping part 112 can also be controlled by the stamping force detected by the pressure sensor group. When the pressure sensor group detects an abnormal stamping force, such as too large or too small pressure, the information is converted into an electrical signal and transmitted to the controller. After receiving the signal, the controller analyzes and processes it to determine whether the current stamping state exceeds the preset range. If the controller determines that the current stamping state exceeds the preset range, the motion parameters of the stamping part 112, such as speed, pressure, etc., are adjusted according to the preset algorithm and rules.

[0121] Specifically, the controller is further configured as follows:

[0122] Obtaining a third displacement, where the third displacement is a matching clearance between the punch 110 and the blank holder 130;

[0123] If the third displacement is greater than the preset tolerance, the first pressure is obtained, and the third pressure is the punching force of the punch 110;

[0124] If the first pressure is greater than the pressure range, a command is sent to the stamping part 112 to adjust the stamping force of the stamping part 112 .

[0125] The adjusted punching force is greater than the first pressure, and the adjustment is used to enable the punch 110 to pass through the blank holder smoothly while maintaining the fitting clearance to ensure the punching quality and efficiency.

[0126] The position, speed and punching force of the punch are monitored in real time by the displacement sensor group 200, the speed sensor group 300 and the pressure sensor group to ensure accurate control of the punching process. The validity of the data is evaluated by calculating the standard deviation and average value of the displacement, speed and pressure to avoid misjudgment caused by sensor failure or data anomaly. The descending speed of the punch 110 is adjusted according to different punching stages to ensure more precise and stable control at each stage.

[0127] Based on the above-mentioned diaphragm stamping and forming system, some embodiments of the present application also provide a control method of the diaphragm stamping and forming system, including:

[0128] In response to the blank holder 130 contacting and pressing the strip, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by the displacement sensor group 200, and the first speed is speed data acquired by the speed sensor group 300;

[0129] According to the first displacement and / or the first speed, sending an instruction to the stamping part 112 to adjust the descending speed of the stamping part 112 to a first preset speed;

[0130] Get the second displacement;

[0131] If the second displacement is a preset displacement, a command is sent to the punching part 112 to control the speed of the punching part 112 to drop to the initial speed.

[0132] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the general concept of this application and do not constitute a limitation on the protection scope of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without creative work belong to the protection scope of this application.

Claims

1. A diaphragm stamping system, characterized in that: include: Stamping die, used for stamping diaphragms; A transmission control assembly connected to the stamping die, comprising a stamping part (112) and a controller; The stamping part (112) is used to provide stamping force for the stamping die; The stamping die comprises: a punch (110), a guide column (120) and a blank holder (130); the guide column (120) penetrates the punch (110) and extends to the blank holder (130); A displacement sensor group (200) is arranged on the blank holder (130) and is used to collect distance data between the punch (110) and the blank holder (130); A speed sensor group (300) is arranged on the punch (110) near the blank holder (130) and is used to collect speed data of the punch (110); The controller is configured to: In response to the blank holder (130) contacting and pressing the strip, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by a displacement sensor group (200), and the first speed is speed data acquired by a speed sensor group (300); According to the first displacement and / or the first speed, sending an instruction to the punching part (112) to adjust the descending speed of the punching part (112) to a first preset speed; Get the second displacement; If the second displacement is a preset displacement, a command is sent to the punching part (112) to control the speed of the punching part (112) to drop to an initial speed.

2. The diaphragm stamping system according to claim 1, characterized in that: The stamping die also includes: A connecting member (140) comprises a first connecting portion (141) and a fixing portion (142), wherein one end of the first connecting portion (141) is connected to the stamping portion (112), and the other end of the first connecting portion (141) is connected to the fixing portion (142), and the fixing portion (142) comprises at least a first fixing hole and a second fixing hole; The punch (110) has a T-shaped cross-section and comprises a second connecting portion (111) and a punching portion (112); one end of the second connecting portion (111) is connected to the fixing portion (142); the other end of the second connecting portion (111) is connected to the punching portion (112); and the second connecting portion (111) comprises at least a third fixing hole and a fourth fixing hole.

3. The diaphragm stamping system according to claim 2, characterized in that: The guide column (120) passes through the first fixing hole and the third fixing hole, and when the punching part (112) moves in a first direction, one end of the guide column (120) is close to one end of the first fixing hole, and the first direction is a movement direction close to the punch (110); The stamping die also includes a connecting rod (150), and the connecting rod (150) passes through the second fixing hole and the fourth fixing hole.

4. The diaphragm stamping system according to claim 2, characterized in that: The blank holder (130) comprises at least a fifth fixing hole, and the guide column (120) passes through the first fixing hole and the third fixing hole and extends into the fifth fixing hole; The guide column (120) is provided with a return spring (121), and the return spring (121) is located between the second connecting portion (111) and the blank holder (130); The stamping die also includes a soft die (160), which is arranged at one end of the blank holder (130) away from the punch (110), and a strip is placed between the soft die (160) and the blank holder (130).

5. The diaphragm stamping system according to claim 1, characterized in that: The displacement sensor group (200) comprises at least a first displacement sensor and a second displacement sensor; The controller sends an instruction to the punch (110) according to the first displacement and / or the first speed to adjust the descending speed of the punch (110) to a first preset speed, and is specifically configured as follows: Calculating a displacement standard deviation based on the displacement data collected by the first displacement sensor and the displacement data collected by the second displacement sensor; If the displacement standard deviation is less than or equal to the displacement standard deviation threshold, calculating the displacement average value according to the displacement data collected by the first displacement sensor and the displacement data collected by the second displacement sensor; According to the first displacement, a feedback signal is sent to the punch (110) to adjust the descending speed of the punch (110) to a first preset speed, and the feedback signal is an average value of the displacement.

6. The diaphragm stamping system according to claim 1, characterized in that: The speed sensor group (300) comprises at least a first speed sensor and a second speed sensor; The controller sends an instruction to the punch (110) according to the first displacement and / or the first speed to adjust the descending speed of the punch (110) to a first preset speed, and is specifically configured as follows: Calculating a speed standard deviation based on the speed data collected by the first speed sensor and the speed data collected by the second speed sensor; If the speed standard deviation is less than or equal to the speed standard deviation threshold, calculating a speed average value according to the speed data collected by the first speed sensor and the speed data collected by the second speed sensor; According to the first displacement and / or the first speed, a feedback signal is sent to the punch (110) to adjust the descending speed of the punch (110) to a first preset speed, and the feedback signal is a speed average value and / or a displacement average value.

7. The diaphragm stamping system according to claim 1, characterized in that: The transmission control assembly also includes a pressure sensor group for collecting pressure data during the stamping process; The controller is also configured to: According to the pressure data, a stamping stage is obtained, wherein the stamping stage includes a contact stage, a forming stage and an unloading stage; Acquiring multiple sections of control data, wherein the multiple sections of control data include contact stage data, forming stage data, and unloading stage data; According to the stamping stage, an instruction is sent to the stamping part (112) to adjust the descending speed of the stamping part (112) according to multiple sections of control data.

8. The diaphragm stamping system according to claim 1, characterized in that: The stamping portion (112) is provided with a fifth fixing hole; the displacement sensor group (200) further comprises a third displacement sensor, and the third displacement sensor is arranged in the fifth fixing hole; The controller is also configured to: Obtaining a third displacement, wherein the third displacement is a matching clearance between the punch (110) and the blank holder (130); If the third displacement is greater than the preset tolerance, a command is sent to the punching part (112) to adjust the increasing speed of the punching part (112) to a second preset speed.

9. A control method for a membrane stamping system, characterized in that: include: In response to the blank holder contacting and pressing the strip, a first displacement and a first speed are acquired, wherein the first displacement is displacement data acquired by the displacement sensor group, and the first speed is speed data acquired by the speed sensor group; According to the first displacement and / or the first speed, sending an instruction to the stamping part to adjust the descending speed of the stamping part to a first preset speed; Get the second displacement; If the second displacement is a preset displacement, a command is sent to the stamping part to control the speed of the stamping part to drop to an initial speed.

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