Sealing performance detection device for vacuum chuck manufacturing

Abstract

The invention relates to the technical field of sucker manufacturing, in particular to a sealing performance detection device for vacuum sucker manufacturing, which comprises a bottom plate, the upper end face of the bottom plate is fixedly connected with a rack, the upper end face of the rack is fixedly provided with an electric cylinder push rod, and the telescopic end of the electric cylinder push rod is rotatably connected with a rotary through pipe through a sealing bearing. The outer peripheral wall of the rotating through pipe is fixedly connected with a suction cup fixing assembly and an electrodeless simulation detection assembly. The device can fully simulate and detect the sealing performance of the vacuum suction cup in different deformation states and different pressure degrees, can realize stepless adjustment of reciprocating swing amplitude and frequency of the vacuum suction cup, ensures the comprehensiveness and sufficiency of the sealing performance detection of the vacuum suction cup, improves the manufacturing yield of the vacuum suction cup, and improves the production efficiency of the vacuum suction cup. In addition, instant marking of poor sealing areas of the vacuum chuck can be achieved, comparison with air pressure monitoring is achieved, the detection accuracy of the sealing performance of the vacuum chuck is ensured, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of suction cup manufacturing technology, and more specifically to a sealing performance testing device for vacuum suction cup manufacturing. Background Technology

[0002] Vacuum suction cups are key components widely used in automated production lines, material handling, and precision equipment. Their sealing performance directly determines the stability, safety, and service life of the suction operation. During manufacturing, due to factors such as material uniformity, mold precision, and edge forming processes, suction cups are prone to defects such as micro-cracks, uneven thickness, or localized differences in material density. This can lead to slow air leakage or localized failure under actual negative pressure conditions. Therefore, a rigorous sealing performance testing process is necessary for the manufactured vacuum suction cups.

[0003] The sealing performance testing devices used in the manufacturing process of vacuum suction cups often have the following problems during use: On the one hand, the sealing performance testing process for vacuum suction cup manufacturing typically only tests the sealing performance of the vacuum suction cup under extreme negative pressure, i.e., the maximum shortening deformation state. It is difficult to simulate the state of the vacuum suction cup under different deformations, different degrees of negative pressure, and positive pressure. Moreover, in actual use, vacuum suction cups are prone to shaking or vibration due to external forces such as contact collisions or friction. The testing process cannot effectively simulate the sealing performance of the vacuum suction cup under different working conditions, making the sealing performance testing of vacuum suction cups incomplete and insufficient, affecting the yield rate of vacuum suction cup manufacturing. On the other hand, the sealing test of vacuum suction cups often uses air pressure sensors to monitor changes in air pressure inside the vacuum suction cup. However, when the vacuum suction cup shortens and deforms, its internal air pressure will also change. Using only air pressure monitoring lacks a monitoring control group and makes it inconvenient to mark the location of insufficient sealing performance of the vacuum suction cup in real time, affecting the accuracy and efficiency of the sealing performance testing of vacuum suction cups. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a sealing performance testing device for vacuum suction cup manufacturing. This device effectively solves the problems in existing technologies, such as the difficulty in simulating the sealing performance of vacuum suction cups under different deformation and pressure conditions, resulting in incomplete testing, the inability to effectively simulate the sealing performance of vacuum suction cups under complex working conditions such as external force vibration in actual use, which affects the yield rate of vacuum suction cups, and the lack of comparison due to reliance on air pressure monitoring, which cannot immediately locate and mark leakage points, thus affecting the accuracy and efficiency of testing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a sealing performance testing device for vacuum suction cup manufacturing, comprising: A base plate, on the upper surface of which a frame is fixedly connected, and an electric cylinder push rod is fixedly installed on the upper surface of the frame. The telescopic end of the electric cylinder push rod is rotatably connected to a rotating tube through a sealed bearing. A suction cup fixing assembly and a stepless simulation detection assembly are fixedly connected to the outer peripheral wall of the rotating tube. The stepless simulation testing component includes a toothed ring fixedly connected to the outer peripheral wall of the rotating tube, a reciprocating screw rotatably connected to the side wall of the frame, a transverse slider threaded onto the outer peripheral wall of the reciprocating screw, a support plate and a toothed plate fixedly connected to the outer wall of the transverse slider, the toothed ring meshing with the toothed plate for transmission, inclined blocks fixedly connected to both ends of the support plate, and a limitless position component rotatably connected to the top of the frame. A reference mark detection component is fixedly connected to the upper surface of the base plate.

[0006] Furthermore, it also includes: a vacuum pressure composite pump, which is fixedly installed on the upper end face of the frame, and the vacuum pressure composite pump is connected to the rotary pipe through a high-pressure hose.

[0007] Furthermore, the limitless position component includes a longitudinal lead screw rotatably connected to the top of the frame, a stepper motor fixedly mounted on the upper end face of the frame, the output end of the stepper motor fixedly connected to the end of the longitudinal lead screw, a longitudinal slider threadedly fitted on the outer peripheral wall of the longitudinal lead screw, a lifting frame fixedly connected to the bottom end of the longitudinal slider, and two inclined abutment frames fixedly connected to the lower end face of the lifting frame, the two inclined abutment blocks selectively contacting and engaging with the two inclined abutment frames respectively.

[0008] Furthermore, the stepless simulation testing component also includes a fixed bracket fixedly connected to the inner wall of the frame. A variable frequency motor is fixedly installed inside the fixed bracket. The output end of the variable frequency motor is fixedly connected to the end of the reciprocating lead screw. Two limiting slide rods are fixedly connected to the inner wall of the frame. Two collar frames are fixedly connected to the outer wall of the gear plate. The two collar frames are in contact and sliding cooperation with the two limiting slide rods respectively.

[0009] Furthermore, the suction cup fixing assembly includes a support plate fixedly connected to the outer peripheral wall of the rotating tube. Two small electric push rods are fixedly connected to the lower end face of the support plate. A connecting frame is fixedly connected to the telescopic ends of the two small electric push rods. An arc-shaped clamp is fixedly connected to the end of the connecting frame near the rotating tube. An arc-shaped abutment is fixedly connected to the bottom end of the connecting frame. A conical rubber sealing ring is fixedly connected to the lower position of the outer peripheral wall of the rotating tube.

[0010] Furthermore, the reference mark detection component includes an annular support fixedly connected to the upper surface of the base plate. Two annular slide rails are fixedly connected to the upper surface of the annular support. An arc-shaped slide frame is slidably connected to the two annular slide rails. A servo motor is fixedly installed on the side wall of the arc-shaped slide frame. A drive gear is fixedly connected to the output end of the servo motor. An annular planar toothed plate is fixedly connected to the upper surface of the annular slide rail. The drive gear meshes with the annular planar toothed plate. A limit frame is fixedly connected to the upper surface of the base plate. The side wall of the limit frame has a hollow structure, and an elastic leather ring is fitted on the outer peripheral wall of the limit frame.

[0011] Furthermore, the reference mark detection assembly also includes a connecting plate fixedly connected to the bottom of the arc-shaped sliding frame. A distance sensor is fixedly installed at the bottom of the connecting plate. The distance sensor is used to monitor the local outward expansion of the elastic ring in real time. A small air pressure sensor is fixedly installed at the lower position of the inner wall of the rotating tube. A PLC controller is fixedly installed on the outer wall of the frame. A sprayer is fixedly installed on the upper surface of the arc-shaped sliding frame. The PLC controller, distance sensor, sprayer, and small air pressure sensor are electrically connected to an external power supply.

[0012] Furthermore, the arc-shaped support frame has a tapered cross-section, and anti-slip rubber pads are fixedly connected to the inner sides of both the arc-shaped support frame and the arc-shaped clamping plate.

[0013] The technical solution provided by this invention has the following advantages compared with the known prior art: This invention incorporates an electric cylinder push rod and a vacuum pressure composite pump. By controlling the extension or retraction of the electric cylinder push rod, the rotary tube is moved up and down, allowing the vacuum suction cup to remain stable in its shortened or elongated deformed state. Simultaneously, the vacuum pressure composite pump is controlled to draw or discharge air into the rotary tube and the vacuum suction cup through a high-pressure hose, thereby changing the negative or positive pressure environment inside the vacuum suction cup and causing it to contract or expand. This allows for a thorough simulation and testing of the sealing performance of the vacuum suction cup under different deformation states and pressure levels. This invention incorporates a limitless positioning component. When the vacuum suction cup is stably subjected to different deformations and pressure levels, a variable frequency motor drives a reciprocating screw to rotate, causing the transverse slider to move axially along the reciprocating screw and drive the support plate and toothed plate to move horizontally back and forth. The meshing transmission between the toothed plate and the toothed ring drives the rotating tube to rotate in both directions with a small amplitude, thereby causing the vacuum suction cup to swing back and forth, simulating the shaking and vibration of the vacuum suction cup under actual working conditions. Simultaneously, a stepper motor drives a longitudinal screw to rotate, causing the longitudinal slider to move axially along the longitudinal screw and drive the lifting frame and the inclined abutment frame to move up and down, thereby changing the limiting distance between the two inclined abutment blocks and the transverse slider. This achieves stepless adjustment of the horizontal reciprocating movement distance of the toothed plate and the reciprocating swing amplitude and frequency of the vacuum suction cup, further fully simulating the sealing performance of the vacuum suction cup under different working conditions, ensuring the comprehensiveness and sufficiency of the vacuum suction cup sealing performance test, and improving the yield rate of vacuum suction cup manufacturing. This invention includes a reference marking detection component. When the vacuum suction cup is in a positive pressure expansion state, to detect the sealing performance of the bottom end of the vacuum suction cup, a servo motor drives a drive gear to rotate. The meshing transmission between the drive gear and the annular planar toothed plate drives the arc-shaped sliding frame to slide relative to the annular slide rail. This causes the arc-shaped sliding frame to drive a distance sensor to rotate around the vacuum suction cup. If there is a local sealing failure at the bottom end of the vacuum suction cup, a small air pressure sensor can detect the change in air pressure inside the vacuum suction cup. At the same time, air inside the vacuum suction cup will leak out through the poorly sealed area at its bottom end and continuously blow the elastic ring, causing the elastic ring to expand locally. The rotating distance sensor monitors the degree of local expansion of the elastic ring in real time and transmits the signal to the PLC controller. The PLC controller controls the sprayer to spray paint onto the outer wall of the vacuum suction cup, realizing the instant marking of the poorly sealed area of ​​the vacuum suction cup. This marks the area and forms a monitoring reference with the small air pressure sensor, ensuring the accuracy of the vacuum suction cup sealing performance detection and improving the detection efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a three-dimensional structural schematic diagram from one perspective of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a schematic diagram of the structure of the rotating tube and suction cup fixing assembly in this invention; Figure 4This is a schematic diagram of the rotating through-tube structure in this invention; Figure 5 This is a schematic diagram of a portion of the electrodeless simulation detection component in this invention; Figure 6 This is a schematic diagram of the horizontal slider section structure in this invention; Figure 7 This is a schematic diagram of a portion of the control marker detection component in this invention; Figure 8 This is a schematic diagram of the arc-shaped sliding frame structure in this invention; Figure 9 This is a schematic diagram of the limiting frame and elastic ring structure in this invention.

[0016] Reference numerals: 1. Base plate; 2. Frame; 3. Electric cylinder push rod; 4. Sealed bearing; 5. Rotary tube; 6. Suction cup fixing assembly; 61. Support plate; 62. Small electric push rod; 63. Connecting frame; 64. Arc-shaped clamp; 65. Arc-shaped abutment; 66. Conical rubber sealing ring; 7. Infinitely variable simulation detection assembly; 71. Gear ring; 72. Reciprocating lead screw; 73. Lateral slider; 74. Support plate; 75. Gear plate; 76. Angled abutment; 77. Vacuum pressure composite pump; 78. High-pressure hose; 79. Fixed bracket; 710. Variable frequency motor; 71 1. Limiting slide bar; 7.12. Ring frame; 8. Limitless component; 8.1. Longitudinal lead screw; 8.2. Stepper motor; 8.3. Longitudinal slider; 8.4. Lifting frame; 8.5. Angled abutment frame; 9. Comparison mark detection component; 9.1. Annular support; 9.2. Annular slide rail; 9.3. Arc-shaped slide frame; 9.4. Servo motor; 9.5. Drive gear; 9.6. Limiting frame; 9.7. Elastic leather ring; 9.8. Connecting plate; 9.9. Distance sensor; 9.10. Small air pressure sensor; 9.11. PLC controller; 9.12. Sprayer; 9.13. Annular flat toothed plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The present invention will be further described below with reference to embodiments.

[0019] Example: Refer to Figures 1 to 9 A sealing performance testing device for vacuum suction cup manufacturing, comprising: The base plate 1 has a frame 2 fixedly connected to its upper end. An electric cylinder push rod 3 is fixedly installed on the upper end of the frame 2. The electric cylinder push rod 3 is model Z-Mod-EP-42RS-100, with a telescopic stroke of 0-100mm, a lead of 2mm, a maximum continuous pushing force of 260N, and a repeatability of ±0.02mm. It can achieve precise adjustment of the vacuum suction cup's shortening or elongation deformation from 0-50mm. The telescopic end of the electric cylinder push rod 3 is rotatably connected to a rotating tube 5 through a sealed bearing 4. A suction cup fixing assembly 6 and a stepless simulation detection assembly 7 are fixedly connected to the outer peripheral wall of the rotating tube 5. The suction cup fixing assembly 6 includes a support plate 61 fixedly connected to the outer peripheral wall of the rotating tube 5. Two small electric push rods 62 are fixedly connected to the lower end face of the support plate 61. The small electric push rods 62 are model DATIEE-IMD3. The telescopic ends of the two small electric push rods 62 are fixedly connected to a connecting frame 63. An arc-shaped clamping plate 64 is fixedly connected to the end of the connecting frame 63 near the rotating tube 5. An arc-shaped abutment 65 is fixedly connected to the bottom end of the connecting frame 63. The arc-shaped abutment 65 has a tapered cross-section. Anti-slip rubber pads are fixedly connected to the inner sides of the arc-shaped abutment 65 and the arc-shaped clamping plate 64. A tapered rubber sealing ring 66 is fixedly connected to the lower part of the outer peripheral wall of the rotating tube 5. The telescopic end of the electric cylinder push rod 3 moves downward, causing the rotating tube 5 to move closer to the vacuum suction cup and connect the bottom end of the rotating tube 5 to the inside of the vacuum suction cup interface. The conical rubber sealing ring 66 on the outer circumference of the rotating tube 5 is squeezed and fully filled by the vacuum suction cup interface under the limiting action of the vacuum suction cup interface. This controls the telescopic ends of the two small electric push rods 62 to extend and run. The telescopic ends of the small electric push rods 62 drive the connecting frame 63 to move, thereby driving the two arc-shaped clamps 64 and the two arc-shaped abutments 65 to move closer to the vacuum suction cup. The two arc-shaped clamps 64 can clamp and fix the vacuum suction cup interface and the rotating tube 5 as a whole. At the same time, the two arc-shaped abutments 65 abut against and limit the outer wall of the vacuum suction cup to achieve the connection and fixation of the vacuum suction cup and the rotating tube 5, which facilitates the subsequent sealing test operation of the vacuum suction cup. It also includes: a vacuum pressure composite pump 77, which is fixedly installed on the upper end face of the frame 2. The vacuum pressure composite pump 77 is connected to the rotary pipe 5 through a high-pressure hose 78. The vacuum pressure composite pump 77 is model VPC-06, with a negative pressure adjustment range of -0.1MPa to 0MPa, a positive pressure adjustment range of 0MPa to 0.6MPa, and a pumping rate and exhaust rate of 5-50L / min to meet the simulation requirements of different pressure levels. By controlling the extension or retraction of the electric cylinder push rod 3, the rotary tube 5 is driven to move up and down, so that the vacuum suction cup can be stabilized in the state after shortening or elongating deformation. At the same time, the vacuum pressure composite pump 77 is controlled to operate. The vacuum pressure composite pump 77 draws or discharges air into the rotary tube 5 and the vacuum suction cup through the high-pressure hose 78 to change the negative or positive pressure environment inside the vacuum suction cup, so as to cause the vacuum suction cup to contract or expand. This can fully simulate and test the sealing performance of the vacuum suction cup under different deformation states and different pressure levels. The stepless simulation testing component 7 includes a toothed ring 71 fixedly connected to the outer peripheral wall of the rotary tube 5, a reciprocating screw 72 rotatably connected to the side wall of the frame 2, a transverse slider 73 threadedly fitted to the outer peripheral wall of the reciprocating screw 72, a support plate 74 and a toothed plate 75 fixedly connected to the outer wall of the transverse slider 73, the toothed ring 71 and the toothed plate 75 meshing and transmitting, and inclined blocks 76 fixedly connected to both ends of the support plate 74. The top of the frame 2 is rotatably connected to a limitless position component 8, which includes a longitudinal lead screw 81 rotatably connected to the top of the frame 2. A stepper motor 82 is fixedly installed on the upper surface of the frame 2. The stepper motor 82 is a 42HS08 model. The output end of the stepper motor 82 is fixedly connected to the end of the longitudinal lead screw 81. A longitudinal slider 83 is threaded on the outer peripheral wall of the longitudinal lead screw 81. A lifting frame 84 is fixedly connected to the bottom end of the longitudinal slider 83. Two inclined abutment frames 85 are fixedly connected to the lower surface of the lifting frame 84. The two inclined abutment blocks 76 selectively contact and cooperate with the two inclined abutment frames 85 respectively. The stepless simulation testing component 7 also includes a fixed bracket 79 fixedly connected to the inner wall of the frame 2. A variable frequency motor 710 is fixedly installed inside the fixed bracket 79. The variable frequency motor 710 is model FE2VP-180, rated voltage 380V, frequency adjustment range 10-50Hz, corresponding to the reciprocating oscillation frequency of the vacuum suction cup 10-50 times / minute. The output end of the variable frequency motor 710 is fixedly connected to the end of the reciprocating lead screw 72. Two limit slide rods 711 are fixedly connected to the inner wall of the frame 2. Two collar frames 712 are fixedly connected to the outer wall of the toothed plate 75. The two collar frames 712 are in contact and sliding cooperation with the two limit slide rods 711 respectively. Specifically, when the rotary tube 5 moves up and down, the toothed ring 71 can slide freely relative to the toothed plate 75 in an engaged state to adapt to the lifting height of the rotary tube 5 and stably drive the rotary tube 5 to swing. Specifically, the inclined surface angles of the inclined block 76 and the inclined frame 85 are both 45 degrees, and the contact area is 20mm×20mm; for every 10mm rise and fall of the inclined frame 85, the horizontal slider 73 reciprocates 7.5mm, thereby achieving stepless adjustment of the swing amplitude and frequency of the vacuum suction cup. The variable frequency motor 710 drives the reciprocating screw 72 to rotate, causing the horizontal slider 73 to move axially along the reciprocating screw 72 and drive the support plate 74 and the toothed plate 75 to move horizontally back and forth. The meshing transmission between the toothed plate 75 and the toothed ring 71 drives the rotating tube 5 to rotate in both directions with a small amplitude, which in turn drives the vacuum chuck to swing back and forth, realizing the simulation of shaking and vibration in the actual working conditions of the vacuum chuck. At the same time, the stepper motor 82 is controlled to run, and the stepper motor 82 drives the longitudinal screw 81 to rotate, causing the longitudinal slider 83 to move axially along the longitudinal screw 81 and drive the lifting frame 84 and the inclined abutment frame 85 to move up and down, so as to change the limiting distance between the inclined abutment frame 85 and the two inclined abutment blocks 76 and the horizontal slider 73, realizing the stepless adjustment of the horizontal reciprocating movement distance of the toothed plate 75 and the reciprocating swing amplitude and frequency of the vacuum chuck. This further fully simulates the sealing performance of the vacuum chuck under different working conditions, ensuring the comprehensiveness and sufficiency of the vacuum chuck sealing performance test, and improving the yield rate of vacuum chuck manufacturing. A reference mark detection component 9 is fixedly connected to the upper end face of the base plate 1. The reference mark detection component 9 includes an annular support 91 fixedly connected to the upper end face of the base plate 1. Two annular slide rails 92 are fixedly connected to the upper end face of the annular support 91. An arc-shaped slide frame 93 is slidably connected to the two annular slide rails 92. A servo motor 94 is fixedly installed on the side wall of the arc-shaped slide frame 93. The servo motor 94 is model 80DK-M07725. A drive gear 95 is fixedly connected to the output end of the servo motor 94. An annular flat toothed plate 913 is fixedly connected to the upper end face of the annular slide rails 92. The drive gear 95 meshes with the annular flat toothed plate 913 for transmission. A limit frame 96 is fixedly connected to the upper end face of the base plate 1. The side wall of the limit frame 96 adopts a hollow structure, and an elastic leather ring 97 is fitted on the outer peripheral wall of the limit frame 96. The reference mark detection assembly 9 also includes a connecting plate 98 fixedly connected to the bottom of the arc-shaped sliding frame 93. A distance sensor 99 is fixedly installed at the bottom of the connecting plate 98. The distance sensor 99 is used to monitor the local outward expansion of the elastic ring 97 in real time. The distance sensor 99 is model SGI050, with a working distance of 50mm, a measurement range of -9 to 8mm, a repeatability of 0.1μm, and a sampling frequency of 88kHz. It can accurately monitor the local outward expansion of the elastic ring 97. A small air pressure sensor 910 is fixedly installed at the lower part of the inner wall of the rotating tube 5. The small air pressure sensor 910 is model MPX5700DP, with a range of -0.15MPa to 1MPa and a detection accuracy of ±0.001MPa. It can capture vacuum suction in real time. The small air pressure changes inside the tray are controlled by a PLC controller 911 fixedly installed on the outer wall of the frame 2. The PLC controller 911 is model S7-200SMARTSR20, which can realize real-time comparison of data between the small air pressure sensor 910 and the distance sensor 99, and accurately trigger the sprayer 912 to operate. The sprayer 912 is fixedly installed on the upper surface of the arc-shaped sliding frame 93. The sprayer 912 is model P200-Mini, with a nozzle diameter of 0.5mm, a single spray volume of 0.01mL, a marking point diameter of 2mm, and a response delay of ≤0.2s. It is suitable for the rapid marking of vacuum suction cup sealing defects. The PLC controller 911, the distance sensor 99, the sprayer 912, the small air pressure sensor 910 are electrically connected to an external power supply. Specifically, the elastic ring 97 is made of nitrile rubber with a Shore hardness of 50HA and an elastic modulus of 10N / mm. When the leakage at the bottom of the vacuum suction cup is ≥0.1L / min, the local outward expansion of the elastic ring 97 is ≥0.5mm, triggering the distance sensor 99 to monitor the signal. Specifically, the control logic of PLC controller 911 is as follows: when the small air pressure sensor 910 detects an air pressure change rate ≥ 0.005 MPa / s, and the distance sensor 99 detects an outward expansion of the elastic ring 97 ≥ 0.5 mm, the sprayer 912 is triggered to spray the mark after a delay of 0.2 s. When the vacuum suction cup is in a positive pressure expansion state, the servo motor 94 drives the drive gear 95 to rotate. The meshing transmission between the drive gear 95 and the annular flat toothed plate 913 drives the arc-shaped sliding frame 93 to slide relative to the annular slide rail 92. This causes the arc-shaped sliding frame 93 to drive the distance sensor 99 to rotate around the vacuum suction cup. If there is a local sealing failure at the bottom of the vacuum suction cup, the small air pressure sensor 910 can detect the change in air pressure inside the vacuum suction cup. At the same time, the air inside the vacuum suction cup will leak out through the poorly sealed area at its bottom and continuously blow the elastic ring 97, causing the elastic ring 97 to expand locally. The rotating distance sensor 99 monitors the degree of local expansion of the elastic ring 97 in real time and transmits the signal to the PLC controller 911. The PLC controller 911 controls the sprayer 912 to spray paint onto the outer wall of the vacuum suction cup, realizing the real-time marking of the poorly sealed area of ​​the vacuum suction cup. This is compared with the monitoring of the small air pressure sensor 910 to ensure the accuracy of the vacuum suction cup sealing performance detection and improve the detection efficiency.

[0020] The working principle of this invention is as follows: In use, firstly, use the suction cup fixing assembly 6 to fix the vacuum suction cup to the bottom of the rotating tube 5: place the vacuum suction cup to be tested directly below the rotating tube 5, with the bottom end of the vacuum suction cup and the upper end face of the base plate 1 in contact and seal, so that the axis of the vacuum suction cup interface end corresponds to the axis of the rotating tube 5. Control the extension end of the electric cylinder push rod 3 to move downward, so as to drive the rotating tube 5 to move closer to the vacuum suction cup and connect to the inside of the vacuum suction cup interface end. The conical rubber sealing ring 66 on the outer peripheral wall of the rotating tube 5 is limited by the vacuum suction cup interface end. The interface end is squeezed and fully filled, and then the extension ends of the two small electric push rods 62 are extended and operated. The extension ends of the small electric push rods 62 drive the connecting frame 63 to move, so as to drive the two arc-shaped clamps 64 and the two arc-shaped abutments 65 to move closer to the vacuum suction cup. The two arc-shaped clamps 64 can clamp and fix the interface end of the vacuum suction cup and the rotating tube 5 as a whole. At the same time, the two arc-shaped abutments 65 abut against and limit the outer wall of the vacuum suction cup, thereby realizing the connection and fixation of the vacuum suction cup and the rotating tube 5. After the vacuum suction cup is connected and fixed to the rotary tube 5, the rotary tube 5 is moved up and down by controlling the extension or retraction of the electric cylinder push rod 3. This allows the vacuum suction cup to be stabilized in the shortened or elongated state. At the same time, the vacuum pressure composite pump 77 is controlled to run. The vacuum pressure composite pump 77 draws or discharges air into the rotary tube 5 and the vacuum suction cup through the high-pressure hose 78 to change the negative or positive pressure environment inside the vacuum suction cup, causing the vacuum suction cup to contract or expand. This fully simulates and tests the sealing performance of the vacuum suction cup under different deformation states and different pressure levels. When the vacuum suction cup is stably under different deformation and pressure levels, the variable frequency motor 710 is controlled to run. The variable frequency motor 710 drives the reciprocating screw 72 to rotate, so that the horizontal slider 73 moves along the axial direction of the reciprocating screw 72 and drives the support plate 74 and the toothed plate 75 to move horizontally back and forth. The meshing transmission between the toothed plate 75 and the toothed ring 71 drives the rotating tube 5 to rotate back and forth in a small amplitude, which in turn drives the vacuum suction cup to swing back and forth, realizing the simulation of shaking and vibration in the actual working conditions of the vacuum suction cup. At the same time, the stepper motor 82 is controlled to run, so that the stepper motor 82 drives the longitudinal screw 81 to rotate, so that the longitudinal slider 83 moves along the axial direction of the longitudinal screw 81 and drives the lifting frame 84 and the inclined abutment frame 85 to move up and down, so as to change the limiting distance of the inclined abutment frame 85 on the two inclined abutment blocks 76 and the horizontal slider 73, realizing the stepless adjustment of the horizontal reciprocating movement distance of the toothed plate 75 and the reciprocating swing amplitude and frequency of the vacuum suction cup, fully simulating the sealing performance of the vacuum suction cup under different working conditions. When the vacuum pressure composite pump 77 discharges air into the vacuum suction cup through the high-pressure hose 78, the vacuum suction cup is in a positive pressure expansion state. To check the sealing performance of the bottom of the vacuum suction cup, the servo motor 94 is controlled to run. The servo motor 94 drives the drive gear 95 to rotate. The meshing transmission between the drive gear 95 and the annular flat toothed plate 913 drives the arc-shaped sliding frame 93 to slide relative to the annular slide rail 92. This causes the arc-shaped sliding frame 93 to drive the distance sensor 99 to rotate around the vacuum suction cup. If there is a local sealing failure at the bottom of the vacuum suction cup, the small air pressure sensor 91... The device can monitor changes in air pressure inside the vacuum suction cup. At the same time, air inside the vacuum suction cup will leak out through the poorly sealed area at its bottom and continuously blow the elastic ring 97, causing the elastic ring 97 to expand locally. The rotating distance sensor 99 monitors the degree of local expansion of the elastic ring 97 in real time and transmits the signal to the PLC controller 911. The PLC controller 911 controls the sprayer 912 to spray paint onto the outer wall of the vacuum suction cup, realizing the instant marking of the poorly sealed area of ​​the vacuum suction cup and forming a monitoring comparison with the small air pressure sensor 910.

[0021] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing performance testing device for manufacturing vacuum suction cups, characterized in that, include: A base plate (1) is fixedly connected to a frame (2) on its upper end face. An electric cylinder push rod (3) is fixedly installed on the upper end face of the frame (2). The telescopic end of the electric cylinder push rod (3) is rotatably connected to a rotating tube (5) through a sealed bearing (4). A suction cup fixing assembly (6) and a stepless simulation detection assembly (7) are fixedly connected to the outer peripheral wall of the rotating tube (5). The stepless simulation testing component (7) includes a toothed ring (71) fixedly connected to the outer peripheral wall of the rotating tube (5), a reciprocating screw (72) rotatably connected to the side wall of the frame (2), a transverse slider (73) threadedly fitted to the outer peripheral wall of the reciprocating screw (72), a support plate (74) and a toothed plate (75) fixedly connected to the outer wall of the transverse slider (73), the toothed ring (71) meshing with the toothed plate (75) for transmission, inclined blocks (76) fixedly connected to both ends of the support plate (74), and a limitless position component (8) rotatably connected to the top of the frame (2). The upper surface of the base plate (1) is fixedly connected to the reference mark detection component (9).

2. The sealing performance testing device for vacuum chuck manufacturing according to claim 1, characterized in that, Also includes: Vacuum pressure composite pump (77) is fixedly installed on the upper end face of the frame (2). The vacuum pressure composite pump (77) is connected to the rotary pipe (5) through a high-pressure hose (78).

3. The sealing performance testing device for vacuum chuck manufacturing according to claim 1, characterized in that, The limitless position component (8) includes a longitudinal lead screw (81) rotatably connected to the top of the frame (2). A stepper motor (82) is fixedly installed on the upper surface of the frame (2). The output end of the stepper motor (82) is fixedly connected to the end of the longitudinal lead screw (81). A longitudinal slider (83) is threadedly fitted on the outer peripheral wall of the longitudinal lead screw (81). A lifting frame (84) is fixedly connected to the bottom end of the longitudinal slider (83). Two inclined abutment frames (85) are fixedly connected to the lower surface of the lifting frame (84). The two inclined abutment blocks (76) selectively contact and cooperate with the two inclined abutment frames (85).

4. The sealing performance testing device for vacuum chuck manufacturing according to claim 1, characterized in that, The stepless simulation testing component (7) also includes a fixed bracket (79) fixedly connected to the inner wall of the frame (2). A variable frequency motor (710) is fixedly installed on the inner side of the fixed bracket (79). The output end of the variable frequency motor (710) is fixedly connected to the end of the reciprocating screw (72). Two limiting slide rods (711) are fixedly connected to the inner wall of the frame (2). Two collar frames (712) are fixedly connected to the outer wall of the toothed plate (75). The two collar frames (712) respectively contact and slide with the two limiting slide rods (711).

5. The sealing performance testing device for vacuum chuck manufacturing according to claim 1, characterized in that, The suction cup fixing assembly (6) includes a support plate (61) fixedly connected to the outer peripheral wall of the rotating tube (5). Two small electric push rods (62) are fixedly connected to the lower end face of the support plate (61). A connecting frame (63) is fixedly connected to the telescopic ends of the two small electric push rods (62). An arc-shaped clamp (64) is fixedly connected to the end of the connecting frame (63) near the rotating tube (5). An arc-shaped abutment (65) is fixedly connected to the bottom end of the connecting frame (63). A conical rubber sealing ring (66) is fixedly connected to the lower position of the outer peripheral wall of the rotating tube (5).

6. The sealing performance testing device for vacuum chuck manufacturing according to claim 1, characterized in that, The reference mark detection component (9) includes an annular support (91) fixedly connected to the upper surface of the base plate (1). Two annular slide rails (92) are fixedly connected to the upper surface of the annular support (91). An arc-shaped slide frame (93) is slidably connected to the two annular slide rails (92). A servo motor (94) is fixedly installed on the side wall of the arc-shaped slide frame (93). A drive gear (95) is fixedly connected to the output end of the servo motor (94). An annular plane toothed plate (913) is fixedly connected to the upper surface of the annular slide rails (92). The drive gear (95) meshes with the annular plane toothed plate (913). A limit frame (96) is fixedly connected to the upper surface of the base plate (1). The side wall of the limit frame (96) adopts a hollow structure, and an elastic leather ring (97) is fitted on the outer peripheral wall of the limit frame (96).

7. The sealing performance testing device for vacuum chuck manufacturing according to claim 6, characterized in that, The reference mark detection component (9) also includes a connecting plate (98) fixedly connected to the bottom of the arc-shaped sliding frame (93). A distance sensor (99) is fixedly installed at the bottom of the connecting plate (98). The distance sensor (99) is used to monitor the local outward expansion of the elastic ring (97) in real time. A small air pressure sensor (910) is fixedly installed at the lower position of the inner wall of the rotating tube (5). A PLC controller (911) is fixedly installed on the outer wall of the frame (2). A sprayer (912) is fixedly installed on the upper surface of the arc-shaped sliding frame (93). The PLC controller (911), the distance sensor (99), the sprayer (912), and the small air pressure sensor (910) are electrically connected to an external power supply.

8. The sealing performance testing device for vacuum chuck manufacturing according to claim 5, characterized in that, The arc-shaped support (65) has a tapered cross-section, and anti-slip rubber pads are fixedly connected to the inner sides of the arc-shaped support (65) and the arc-shaped clamp (64).

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