Flatness detection device for shaped rubber diaphragm

Abstract

The invention relates to the technical field of rubber diaphragm detection, and particularly discloses a rubber diaphragm flatness detection device after shaping, which comprises a platform base, air holes, a rubber diaphragm, a support rod, a floating mechanism, a detection mechanism, a pushing mechanism and a top plate, and the rubber diaphragm is placed at the top of the platform base. The device can simulate the unconstrained working condition of the rubber diaphragm, fully release the residual stress, truly reflect the overall stress distribution condition, avoid the stress covering problem caused by friction force and normal constraint in traditional contact measurement, and is especially suitable for accurate detection of thin and soft or thick and hard diaphragms; and secondly, weight balance can be detected, hidden defects, such as stress concentration points and rigidity differences, caused by non-uniform material distribution or different densities can be identified, so that deformation, vibration and fatigue behaviors of the diaphragm in actual dynamic application are predicted, the failure risk in product use is greatly reduced, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber diaphragm detection, and particularly to a flatness detection device for rubber diaphragms after shaping. Background Art

[0002] As a key elastic element widely used in fields such as sealing, shock absorption, and sensors, the quality of rubber diaphragms directly affects the performance and service life of equipment. During the manufacturing process, rubber diaphragms need to undergo forming processes such as vulcanization and stamping. These processes may cause problems such as uneven cooling, mold deviation, or material shrinkage, thereby forming residual stress inside the diaphragm. At the same time, the instability of the production process may also lead to uneven film thickness or differences in material density distribution. These internal defects not only affect the initial flatness of the diaphragm but also cause deformation due to stress release or external forces during subsequent use, resulting in problems such as seal failure and response inaccuracy. Therefore, in the production process of rubber diaphragms, it is crucial to accurately detect the flatness after shaping. Currently, the conventional detection methods for the flatness of rubber diaphragms in the industry mainly use contact measurement. Typical devices include a flat platform and a mechanical measurement probe. During detection, the diaphragm is laid flat on the surface of the platform, and the height difference of each point is measured by pressing the probe down. Although this method is easy to operate, it has significant limitations: First, the normal constraint of the platform surface on the diaphragm will inhibit the deformation in the vertical direction, making the internal stress release insufficient, and only surface phenomena such as local wrinkles or slight warping at the edge can be detected, while the overall stress distribution of the diaphragm cannot be reflected. Second, the static friction between the rubber and the platform will hinder the free contraction or expansion of the diaphragm in the horizontal direction, resulting in stress redistribution, which may mask the true stress concentration area. For thin and soft diaphragms, this constraint effect is particularly obvious, and the mutual competition between residual stress and friction may form local wavy patterns; for thick and hard diaphragms, although the apparent deformation is not obvious, the stress residue may cause long-term creep risk. More importantly, many rubber diaphragms are in an approximately unconstrained state in actual applications (such as the pressure-sensitive diaphragms of sensors), and the conventional detection methods cannot simulate this working condition and are difficult to predict the deformation behavior of the diaphragm in actual use. Although non-contact detection methods in the prior art (such as optical scanning) avoid mechanical contact, they still cannot solve the fundamental problem. Such methods usually require the diaphragm to remain stationary and are still substantially restricted by the support surface. More importantly, existing devices do not consider the influence of material density distribution on the performance of the diaphragm. When there are uneven density or composition distributions in the diaphragm, even if the thickness and flatness are qualified, it may still lead to unbalanced weight distribution: areas with high density have high hardness and are prone to forming stress concentration points, accelerating fatigue cracking; areas with low density have insufficient stiffness and produce inconsistent deformations in dynamic applications. This non-uniformity also causes abnormal vibrations and local resonances, reducing the product life. In sealing applications, density differences lead to uneven compression resilience, causing leakage or eccentric wear; in an environment with temperature changes, different thermal expansion coefficients are more likely to cause thermal deformation or thermal fatigue. For precision devices, uneven weight distribution also affects the sensitivity and signal stability of sensors. Summary of the Invention

[0003] The purpose of the present invention is to provide a flatness detection device for a rubber diaphragm after shaping, so as to at least solve the problem of limitations in the detection methods proposed in the prior art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A flatness detection device for a rubber diaphragm after shaping, comprising: a platform base, air holes, a rubber diaphragm, support rods, a floating mechanism, a detection mechanism, a pushing mechanism, and a top plate. A plurality of vertically penetrating air holes are opened at the top end of the inner cavity of the platform base. The rubber diaphragm is placed on the top of the platform base. The number of support rods is four, and the four support rods are respectively arranged at the four corners of the top end of the platform base. The four corners of the bottom end of the top plate are respectively arranged at the top ends of the four support rods. The floating mechanism is arranged in the inner cavity of the platform base, and the floating mechanism can make the rubber diaphragm in a floating state. The detection mechanism is slidably sleeved on the outer wall of the support rod, and the detection mechanism can detect the flatness of the rubber diaphragm and monitor whether the rubber diaphragm is skewed. The pushing mechanism is arranged at the top end of the top plate, and the pushing mechanism can drive the detection mechanism to move up and down precisely.

[0005] Preferably, the detection mechanism includes: a support plate, positioning holes, insulating probes, a baffle, and an induction component. The four corners of the support plate are slidably and adaptively sleeved on the middle parts of the outer walls of the four support rods. A plurality of vertically penetrating positioning holes are opened at the top end of the support plate. The outer wall of the insulating probe is slidably and adaptively inserted into the inner cavity of the positioning hole. The upper and lower ends of the insulating probe respectively extend out of the upper and lower sides of the support plate in a slidable manner. The baffle is arranged on the outer wall of the insulating probe, the baffle is located in the inner cavity of the support plate, the baffle is in contact with the bottom end of the inner cavity of the support plate, and the induction component is arranged on the outer wall of the insulating probe.

[0006] Preferably, the induction component includes: a first contact, a second contact, and an LED indicator light. The first contact is disposed on the inner wall of the positioning hole, the second contact is disposed on the outer wall of the insulating probe, the LED indicator light is disposed at the top of the insulating probe, and the second contact, the pushing mechanism, and the LED indicator light are all electrically connected.

[0007] Preferably, the distance between the top of the baffle and the top of the inner cavity of the support plate is greater than the distance between the bottom end of the second contact and the top end of the first contact.

[0008] Preferably, the floating mechanism includes: an air pump, an air inlet pipe, a main pipeline, branch pipelines, an exhaust pipe, and a pressure monitoring component. The air pump is screwed to the bottom end of the inner cavity of the platform base. One end of the air inlet pipe is disposed at the air inlet of the air pump, and the other end of the air inlet pipe extends out of the inner cavity of the platform base. The outer wall of the main pipeline is disposed at the front side of the top of the inner cavity of the platform base. One end of the main pipeline is disposed at the air outlet of the air pump. The number of branch pipelines is several, and several branch pipelines are respectively arranged at equal intervals along the left-right direction on the rear side of the outer wall of the main pipeline. The inner cavity of the branch pipeline is communicated with the inner cavity of the main pipeline. The number of exhaust pipes is several, and several exhaust pipes are respectively arranged at equal intervals along the front-rear direction on the top of the outer walls of several branch pipelines. The pressure monitoring component is disposed in the inner cavity of the exhaust pipe, and the pressure monitoring component can monitor the air pressure in the inner cavity of the exhaust pipe.

[0009] Preferably, the inner cavity of the exhaust pipe is communicated with the inner cavity of the branch pipeline, and the top end of the exhaust pipe extends into the inner cavity of the air inlet hole.

[0010] Preferably, the pressure monitoring component includes: a support frame, a guide rod, a top block, a rubber film, and a pressure sensor. The support frame is disposed at the bottom of the inner cavity of the exhaust pipe. The guide rod is disposed at the middle of the top of the support frame. The top block is slidably and adaptively sleeved on the outer wall of the guide rod. The rubber film is disposed on the outer wall of the top block. The pressure sensor is disposed at the top of the guide rod.

[0011] Preferably, a solenoid valve is disposed at the bottom of the outer wall of the exhaust pipe, and the solenoid valve is electrically connected to the corresponding pressure sensor.

[0012] Preferably, a honeycomb-shaped rectifier is disposed at the top of the inner cavity of the exhaust pipe.

[0013] A flatness detection device for a rubber diaphragm after shaping proposed by the present invention has the beneficial effects that: 1. The present invention can blow air to the top of the bottom end of the platform through the cooperation among the air pump, the air inlet pipe, the main pipeline, the branch pipelines, and the exhaust pipe, so that the rubber diaphragm on the platform base can float under the action of air pressure, presenting an unconstrained floating state, thereby enabling all the internal stresses generated during the production and processing of the rubber diaphragm to be released.

[0014] 2. When the exhaust pipe blows gas towards the top of the platform base in the present invention, under the action of air pressure, the rubber film will be blown to drive the top block to slide upward. Thus, the top block can be used to squeeze the pressure sensor, prompting the pressure sensor to monitor the air pressure value. At the same time, the pressures of the gases in the inner cavities of multiple exhaust pipes are monitored in real time by multiple pressure sensors. The signals are transmitted from the pressure sensors to the central control console. The central control console compares the air pressures in the inner cavities of multiple exhaust pipes and adjusts the opening and closing degree of the solenoid valve according to the actual situation, so as to adjust the air pressure in the corresponding inner cavity of the exhaust pipe, ensuring that the air pressures in several exhaust pipes are the same.

[0015] 3. When there are uneven density or composition distributions in the rubber diaphragm in the present invention, it will lead to an imbalance in the weight distribution of the rubber diaphragm. Thus, when the rubber diaphragm is in a floating state, since the air pressures of the gases ejected from several exhaust pipes are the same, when the weight distribution of the rubber diaphragm is unbalanced, it will cause the floating rubber diaphragm to tilt. At this time, the pushing mechanism is used to drive the support plate to move downward, and the cooperation among the probe, the first contact, the second contact, and the LED indicator can detect the tilt state of the rubber diaphragm. 4. When it is necessary to monitor the flatness of the rubber diaphragm in the present invention, the air pump is turned off, and the rubber diaphragm is laid flat on the platform base. The cooperation among the pushing mechanism, the probe, the first contact, the second contact, and the LED indicator can detect the flatness of the rubber diaphragm.

[0016] 5. This device can simulate the unconstrained working condition of the rubber diaphragm, fully release the residual stress, truly reflect the overall stress distribution, and avoid the stress masking problem caused by friction and normal constraints in traditional contact measurement. It is especially suitable for the precise detection of thin and soft or thick and hard diaphragm sheets. Secondly, it can detect the weight balance and identify hidden defects caused by uneven material distribution or different densities, such as stress concentration points and stiffness differences, so as to predict the deformation, vibration, and fatigue behavior of the diaphragm in actual dynamic applications, greatly reducing the failure risk during product use and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a front view of the present invention; Figure 3 is an exploded view of the present invention; Figure 4 is an exploded view of the pushing mechanism; Figure 5 is a structural schematic diagram of the support plate; Figure 6 is a structural schematic diagram of the probe; Figure 7Schematic diagram of the floating mechanism; Figure 8 Exploded view of the floating mechanism; Figure 9 For Figure 2 Enlarged view of part A of Figure 10 For Figure 3 Enlarged view of part B of Figure 11 For Figure 5 Enlarged view of part C of Figure 12 For Figure 8 Enlarged view of part D of

[0018] In the figure: 1, platform base; 2, air holes; 3, rubber diaphragm; 4, support rod; 5, floating mechanism; 51, air pump; 52, intake pipe; 53, main pipeline; 54, branch pipeline; 55, exhaust pipe; 56, support frame; 57, guide rod; 58, top block; 59, rubber film; 510, pressure sensor; 511, solenoid valve; 512, honeycomb rectifier; 6, detection mechanism; 61, support plate; 62, positioning hole; 63, first contact; 64, insulating probe; 65, baffle; 66, second contact; 67, LED indicator light; 7, pushing mechanism; 71, transparent acrylic pressing plate; 72, sleeve; 73, motor; 74, lead screw; 8, top plate. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-12, the present invention provides a technical solution for a flatness detection device after the rubber diaphragm is shaped, including: a platform base 1, air holes 2, a rubber diaphragm 3, support rods 4, a floating mechanism 5, a detection mechanism 6, a pushing mechanism 7 and a top plate 8. A plurality of vertically penetrating air holes 2 are opened at the top end of the inner cavity of the platform base 1. The rubber diaphragm 3 is placed on the top of the platform base 1. The number of support rods 4 is four, and the four support rods 4 are respectively arranged at the four corners of the top end of the platform base 1. The four corners of the bottom end of the top plate 8 are respectively arranged at the top ends of the four support rods 4. The floating mechanism 5 is arranged in the inner cavity of the platform base 1, and the floating mechanism 5 can make the rubber diaphragm 3 in a floating state. The detection mechanism 6 is slidably sleeved on the outer wall of the support rod 4, and the detection mechanism 6 can detect the flatness of the rubber diaphragm 3 and monitor whether the rubber diaphragm 3 is skewed. The pushing mechanism 7 is arranged at the top end of the top plate 8, and the pushing mechanism 7 can drive the detection mechanism 6 to move precisely up and down.

[0021] As a preferred solution, further, the detection mechanism 6 includes: a support plate 61, positioning holes 62, insulating probes 64, a baffle 65 and an induction component. The four corners of the support plate 61 are respectively slidably and adaptively sleeved on the middle parts of the outer walls of the four support rods 4. A plurality of vertically penetrating positioning holes 62 are opened at the top end of the support plate 61. The outer wall of the insulating probe 64 is slidably and adaptively inserted into the inner cavity of the positioning hole 62. The upper and lower ends of the insulating probe 64 respectively extend out of the upper and lower sides of the support plate 61 in a slidable manner. By contacting the insulating probe 64 with the rubber diaphragm 3, the flatness of the rubber diaphragm 3 can be detected. The baffle 65 is arranged on the outer wall of the insulating probe 64. The baffle 65 is located in the inner cavity of the support plate 61, and the baffle 65 contacts the bottom end of the inner cavity of the support plate 61. The baffle 65 is used to block the insulating probe 64 to prevent the insulating probe 64 from falling. The induction component is arranged on the outer wall of the insulating probe 64.

[0022] More specifically, the induction component includes: a first contact 63, a second contact 66 and an LED indicator 67. The first contact 63 is arranged on the inner wall of the positioning hole 62. The second contact 66 is arranged on the outer wall of the insulating probe 64. The heights of both the first contact 63 and the second contact 66 are the same as the height of the error range allowed for the flatness of the rubber diaphragm 3. The distance between the top end of the baffle 65 and the top end of the inner cavity of the support plate 61 is greater than the distance between the bottom end of the second contact 66 and the top end of the first contact 63, ensuring that the second contact 66 can move above the first contact 63. The LED indicator 67 is arranged at the top end of the insulating probe 64. The second contact 66, the pushing mechanism 7 and the LED indicator 67 are all electrically connected. The LED indicator 67 is a prior art. When the first contact 63 and the second contact 66 are in contact, the LED indicator 67 can be made to emit light.

[0023] As a preferred solution, further, the floating mechanism 5 includes: an air pump 51, an air inlet pipe 52, a main line 53, a branch line 54, an exhaust pipe 55, a solenoid valve 511, a honeycomb rectifier 512 and an air pressure monitoring component. The air pump 51 is screwed to the bottom end of the inner cavity of the platform base 1. The air pump 51 is a prior art and will not be described in detail here. The air pump 51 is used here to transport air to the inner cavity of the exhaust pipe 55. One end of the air inlet pipe 52 is arranged at the air inlet of the air pump 51, and the other end of the air inlet pipe 52 extends out of the inner cavity of the platform base 1. The outer wall of the main line 53 is arranged in the inner cavity of the platform base 1. At the front side of the top, one end of the main pipeline 53 is arranged at the exhaust port of the air pump 51, the number of branch pipelines 54 is several, and the branch pipelines 54 are respectively arranged at the rear side of the outer wall of the main pipeline 53 at equal distances in the left and right directions, and the inner cavity of the branch pipeline 54 is connected to the inner cavity of the main pipeline 53. The number of exhaust pipes 55 is several, and the exhaust pipes 55 are respectively arranged at the top of the outer wall of the branch pipelines 54 at equal distances in the front and rear directions, and the inner cavity of the exhaust pipe 55 is connected to the inner cavity of the branch pipeline 54. The top of the exhaust pipe 55 extends into the inner cavity of the air inlet 2, and the air pressure monitoring component is arranged in the inner cavity of the exhaust pipe 55. The pressure monitoring component can monitor the air pressure in the inner cavity of the exhaust pipe 55. The solenoid valve 511 is arranged at the bottom of the outer wall of the exhaust pipe 55. The solenoid valve 511 is a prior art and will not be described in detail here. The air pressure discharged from the exhaust pipe 55 can be adjusted by adjusting the opening and closing degree of the solenoid valve 511. The honeycomb rectifier 512 is arranged at the top of the inner cavity of the exhaust pipe 55. The honeycomb rectifier 512 is a prior art and will not be described in detail here. The honeycomb rectifier 512 mainly plays four roles here: First, it reduces turbulence and eddy currents. The honeycomb structure divides the airflow into multiple independent small channels, suppresses large-scale eddy currents, and shows First, it reduces the turbulence intensity and makes the airflow more stable; second, it evens out the airflow distribution. By constraining and guiding the airflow, it ensures that the pressure and velocity distribution in each honeycomb unit are uniform, and controls the injection angle so that the airflow acts vertically on the rubber diaphragm 3; third, it improves the stability of the system and reduces the vibration and noise caused by turbulence. At the same time, the uniform airflow makes the rubber diaphragm 3 balanced and enhances the floating stability; fourth, it optimizes the airflow characteristics, improves the uniformity of dynamic pressure distribution, and avoids the deformation of the rubber diaphragm 3 caused by local high pressure or low pressure. On the whole, the honeycomb rectifier ensures the efficient and stable operation of the system by stabilizing, uniformizing and optimizing the airflow; More specifically, the air pressure monitoring component includes: a support frame 56, a guide rod 57, a top block 58, a rubber film 59, and a pressure sensor 510. The support frame 56 is arranged at the bottom of the inner cavity of the exhaust pipe 55. The guide rod 57 is arranged in the middle of the top of the support frame 56. The top block 58 is slidably and adaptively sleeved on the outer wall of the guide rod 57. The rubber film 59 is arranged on the outer wall of the top block 58. When gas is conveyed in the inner cavity of the exhaust pipe 55, the rubber film 59 will be driven by the air pressure to drive the top block 58 to move upward and press the pressure sensor. The pressure sensor 510 is arranged at the top of the guide rod 57. The solenoid valve 511 is electrically connected to the corresponding pressure sensor 510. The pressure sensor 510 is a prior art and will not be elaborated here. By pressing the pressure sensor 510 with the top block 58, the air pressure in the inner cavity of the exhaust pipe 55 can be reflected; As a preferred solution, furthermore, the pushing mechanism 7 includes: a transparent acrylic pressing plate 71, a sleeve 72, a motor 73, and a lead screw 74. The four corners of the bottom end of the transparent acrylic pressing plate 71 are respectively arranged at the four corners of the top end of the support plate 61. The sleeve 72 is arranged in the middle of the top end of the transparent acrylic pressing plate 71. The motor 73 is screwed to the middle of the top end of the top plate 8. The motor 73 is a prior art and will not be elaborated here. The motor 73 is a servo motor and is connected with an encoder. The motor 73 is used here to drive the lead screw 74 to rotate. The top end of the lead screw 74 is locked to the output end of the motor 73 through a coupling. The lead screw 74 is screwed into the inner cavity of the sleeve 72. The rotational force generated by the rotation of the lead screw 74 can cause the sleeve 72 to drive the transparent acrylic pressing plate 71 to move up and down.

[0024] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0025] Step 1: When in use, connect the first contact 63 to an external power supply, lay the rubber diaphragm 3 flat on the platform base 1, start the air pump 51. The air pump 51 can suck in gas through the intake pipe 52 and discharge it into the inner cavity of the main pipeline 53. The gas flows into the inner cavity of the branch pipeline 54 along the main pipeline 53 and is discharged to the top of the platform base 1 through the exhaust pipe 55. Since the gas flow in the inner cavity of the exhaust pipe 55 will generate wind pressure, under the action of the wind pressure, the rubber film 59 will be blown to drive the top block 58 to move upward, so that the top block 58 squeezes the pressure sensor 510 upward. By reading the value displayed by the pressure sensor 510, the value of the wind pressure in the inner cavity of the exhaust pipe 55 can be judged. The pressure sensor 510 transmits the signal to the central control console, and the central control console compares the values displayed by multiple pressure sensors 510 and adjusts the opening and closing degree of the solenoid valve 511 according to the comparison result. By adjusting the opening and closing degree of the solenoid valve 511, the wind pressure in the inner cavity of the exhaust pipe 55 can be adjusted, so that the air pressure of the gas discharged by several exhaust pipes 55 is the same. Furthermore, under the action of the air pressure, the rubber diaphragm 3 will float up and be in an unconstrained floating state, so that all the internal stresses generated by the rubber diaphragm 3 during production and processing are released; Step 2: Since the air pressure of the gas discharged by several exhaust pipes 55 is the same, it will further cause the air pressure received by each point of the rubber diaphragm 3 to be the same. Therefore, when the density or material distribution of the rubber diaphragm 3 is uneven, it will cause the weight distribution of the rubber diaphragm 3 to be unbalanced, and thus cause the floating rubber diaphragm 3 to be skewed. At this time, start the motor 73, and use the motor 73 to drive the lead screw 74 to rotate. The rotational force generated by the rotation of the lead screw 74 can cause the sleeve 72 to drive the support plate 61 to move downward through the transparent acrylic pressing plate 71. Furthermore, the support plate 61 can drive the insulating probe 64 to move downward. After an insulating probe 64 contacts the rubber diaphragm 3, the support plate 61 continues to drive the insulating probe 64 to move downward. Due to the blockage of the insulating probe 64 by the rubber diaphragm 3, the insulating probe 64 will slide upward along the inner cavity of the positioning hole 62 until one or several second contacts 66 contact the first contact 63 corresponding to their positions. Furthermore, the LED indicator light 67 electrically connected to the second contact 66 will emit light. At this time, turn off the motor 73, observe the insulating probes 64 corresponding to the contour of the rubber diaphragm 3, and observe whether the LED indicator lights 67 at their tops emit light. If there is an LED indicator light 67 that does not emit light, it can be indicated that the density of this position of the rubber diaphragm 3 is relatively large; Step 3: After the weight distribution of the rubber diaphragm 3 is detected, turn off the air pump 51. The rubber diaphragm 3 loses the wind pressure and will then fall onto the platform base 1. Lay the rubber diaphragm 3 flat on the platform base 1 again. According to the standard thickness of the rubber diaphragm 3, start the motor 73. The motor 73 drives the lead screw 74 to rotate. The rotational force generated by the rotation of the lead screw 74 can cause the sleeve 72 to drive the support plate 61 to move downward through the transparent acrylic pressing plate 71. Then, the support plate 61 drives the insulating probe 64 to move downward. After the insulating probe 64 contacts the rubber diaphragm 3, the support plate 61 continues to drive the insulating probe 64 to move downward. Due to the blockage of the rubber diaphragm 3 on the insulating probe 64, the insulating probe 64 will slide upward along the inner cavity of the positioning hole 62 until the support plate 61 moves to a height at which, under the blocking force of the rubber diaphragm 3 on the insulating probe 64, the first contact 63 and the second contact 66 are completely coincident. Then, turn off the motor 73. Since the heights of both the first contact 63 and the second contact 66 are the same as the height within the allowable error range of the flatness of the rubber diaphragm 3, at this time, the position where the flatness of the rubber diaphragm 3 is qualified will cause the first contact 63 and the second contact 66 to contact, thereby causing the LED indicator 67 at the top of the insulating probe 64 to emit light. If there is a position on the rubber diaphragm 3 with excessive depression resulting in unqualified flatness, it will cause the second contact 66 at this position to be below the first contact 63, and the first contact 63 and the second contact 66 do not contact, and the LED indicator 67 at this position does not emit light. Similarly, if there is a position on the rubber diaphragm 3 with excessive protrusion resulting in unqualified flatness, it will cause the second contact 66 at this position to be above the first contact 63, and the first contact 63 and the second contact 66 do not contact, and the LED indicator 67 at this position does not emit light. Thus, by observing the corresponding LED indicator 67 according to the contour of the rubber diaphragm 3, it can be determined whether the flatness of the rubber diaphragm 3 is qualified; Step 4: After the flatness detection is completed, disconnect the connection between the first contact 63 and the external power supply. Continuously press down the corresponding insulating probe 64 according to the contour of the rubber diaphragm 3. Under the extrusion force of the insulating probe 64, the rubber diaphragm 3 will undergo elastic deformation. And when the rubber diaphragm 3 loses the extrusion force applied by the insulating probe 64, it will return to its initial state under the elastic action of the rubber diaphragm 3. Repeat this several times. After the extrusion is completed, repeat the above actions to detect the situation of permanent deformation of the rubber diaphragm 3, so as to judge the fatigue resistance of the rubber diaphragm 3; In summary, this device can simulate the unconstrained condition of the rubber diaphragm 3, fully release the residual stress, truly reflect the overall stress distribution, and avoid the stress masking problem caused by friction and normal constraints in traditional contact measurement. It is especially suitable for the precise detection of thin and soft or thick and hard diaphragms. Secondly, it can detect the weight balance and identify hidden defects caused by uneven material distribution or different densities, such as stress concentration points, stiffness differences, etc., so as to predict the deformation, vibration and fatigue behavior of the diaphragm in actual dynamic applications, greatly reducing the failure risk during product use and extending the service life.

[0026] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flatness detection device for a rubber diaphragm after shaping, characterized in that, Including: A platform base (1), and a plurality of air holes (2) penetrating up and down are formed at the top end of the inner cavity of the platform base (1); A rubber diaphragm (3), and the rubber diaphragm (3) is placed on the top of the platform base (1); Support rods (4), the number of the support rods (4) is four, and the four support rods (4) are respectively arranged at the four corners of the top end of the platform base (1); A top plate (8), and the four corners of the bottom end of the top plate (8) are respectively arranged at the top ends of the four support rods (4); A floating mechanism (5), the floating mechanism (5) is arranged in the inner cavity of the platform base (1), and the floating mechanism (5) can make the rubber diaphragm (3) in a floating state; A detection mechanism (6), the detection mechanism (6) is slidably sleeved on the outer wall of the support rod (4), the detection mechanism (6) can detect the flatness of the rubber diaphragm (3), and monitor whether the rubber diaphragm (3) is skewed; A pushing mechanism (7), the pushing mechanism (7) is arranged at the top end of the top plate (8), and the pushing mechanism (7) can drive the detection mechanism (6) to move up and down precisely.

2. The flatness detection device for a rubber diaphragm after shaping according to claim 1, characterized in that, The detection mechanism (6) includes: A support plate (61), the four corners of the support plate (61) are respectively slidably and fittingly sleeved on the middle parts of the outer walls of the four support rods (4), and a plurality of positioning holes (62) penetrating up and down are formed at the top end of the support plate (61); Insulating probes (64), the outer walls of the insulating probes (64) are slidably and fittingly inserted into the inner cavities of the positioning holes (62), and the upper and lower ends of the insulating probes (64) respectively extend out of the upper and lower sides of the support plate (61) slidably; A baffle (65), the baffle (65) is arranged on the outer wall of the insulating probe (64), the baffle (65) is located in the inner cavity of the support plate (61), and the baffle (65) is in contact with the bottom end of the inner cavity of the support plate (61); An induction component, the induction component is arranged on the outer wall of the insulating probe (64).

3. The flatness detection device for a rubber diaphragm after shaping according to claim 2, characterized in that, The induction component includes: A first contact (63), the first contact (63) is arranged on the inner wall of the positioning hole (62); A second contact (66), the second contact (66) is arranged on the outer wall of the insulating probe (64); An LED indicator light (67), the LED indicator light (67) is arranged at the top end of the insulating probe (64), and the second contact (66), the pushing mechanism (7) and the LED indicator light (67) are all electrically connected.

4. A flatness detection device for a rubber diaphragm after shaping, according to claim 3, characterized in that The distance between the top end of the baffle (65) and the top end of the inner cavity of the support plate (61) is greater than the distance between the bottom end of the second contact (66) and the top end of the first contact (63).

5. The flatness detection device for a rubber diaphragm after shaping according to claim 4, wherein, The floating mechanism (5) includes: An air pump (51), and the air pump (51) is screwed to the bottom end of the inner cavity of the platform base (1); An air inlet pipe (52), one end of the air inlet pipe (52) is arranged at the air inlet of the air pump (51), and the other end of the air inlet pipe (52) extends out of the inner cavity of the platform base (1); A main pipeline (53), the outer wall of the main pipeline (53) is arranged at the front side of the top end of the inner cavity of the platform base (1), and one end of the main pipeline (53) is arranged at the air outlet of the air pump (51); Branch pipelines (54), the number of the branch pipelines (54) is several, and several said branch pipelines (54) are respectively arranged at equal intervals along the left - right direction on the rear side of the outer wall of the main pipeline (53), and the inner cavity of the branch pipeline (54) is communicated with the inner cavity of the main pipeline (53); Exhaust pipes (55), the number of the exhaust pipes (55) is several, and several said exhaust pipes (55) are respectively arranged at equal intervals along the front - rear direction on the top of the outer walls of several branch pipelines (54); A gas pressure monitoring component, the gas pressure monitoring component is arranged in the inner cavity of the exhaust pipe (55), and the gas pressure monitoring component can monitor the gas pressure in the inner cavity of the exhaust pipe (55).

6. The flatness detection device for a rubber diaphragm after shaping according to claim 5, characterized in that, The inner cavity of the exhaust pipe (55) is communicated with the inner cavity of the branch pipeline (54), and the top of the exhaust pipe (55) extends into the inner cavity of the air inlet hole (2).

7. The flatness detection device for a rubber diaphragm after shaping according to claim 6, characterized in that, The gas pressure monitoring component includes: A support frame (56), the support frame (56) is arranged at the bottom of the inner cavity of the exhaust pipe (55); A guide rod (57), the guide rod (57) is arranged in the middle of the top of the support frame (56); A top block (58), the top block (58) is slidably and compatibly sleeved on the outer wall of the guide rod (57); A rubber film (59), the rubber film (59) is arranged on the outer wall of the top block (58); A pressure sensor (510), the pressure sensor (510) is arranged at the top of the guide rod (57).

8. The flatness detection device for a rubber diaphragm after shaping according to claim 7, characterized in that, An electromagnetic valve (511) is arranged at the bottom of the outer wall of the exhaust pipe (55), and the electromagnetic valve (511) is electrically connected to the corresponding pressure sensor (510).

9. A flatness detection device for a rubber diaphragm after shaping, according to claim 8, characterized in that, A honeycomb rectifier (512) is arranged at the top of the inner cavity of the exhaust pipe (55).

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