Pre-filter cup body stress detection system and pre-filter cup body production system

Abstract

The invention provides a pre-filter cup body stress detection system and a pre-filter cup body production system, and relates to the field of detection. The pre-filter cup body stress detection system comprises a conveying mechanism, one end of the conveying mechanism is provided with a to-be-detected area and a feeding mechanical arm, and the other end of the conveying mechanism is provided with a storage area and a discharging mechanical arm. The conveying mechanism is also provided with a stress tester for monitoring the pre-filter cup body and a rotatable clamping mechanism for placing the pre-filter cup body; the feeding mechanical arm and the discharging mechanical arm are each provided with a clamping mechanism, and each clamping mechanism comprises a clamping hand air cylinder and a flexible finger. According to the pre-filter cup body stress detection system provided by the invention, the flexible clamping mechanism can reduce damage to the cup body, the rotatable clamping mechanism is beneficial to rotation of the cup body, and the combination of the flexible clamping mechanism and the rotatable clamping mechanism lays a foundation for automation of a pre-filter cup body stress detection device.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a pre-filter cup stress detection system and a pre-filter cup production system. Background Art

[0002] Plastic products are prone to layout stress concentration during injection molding due to material, structure, process and other reasons, which seriously affects the service life of the product. In order to reduce product stress, post-injection heat treatment is generally used to reduce the stress level of the product and increase the service life of the product. However, in actual applications, the stress of the heat-treated products is not completely released due to structural reasons, and the stress in some areas of the products is still high. After a period of use, the product cracks due to the accumulation of stress. For this reason, stress testing of heat-treated products can further identify risks and increase the service life of the product.

[0003] The pre-filter cup body is made of PC and PA materials by injection molding. After manufacturing, heat treatment is generally used to reduce injection stress to improve product performance, and the service life is further improved. However, in actual applications, there are still cases of premature failure of products due to excessive stress, especially in terms of anti-freezing. Excessive concentrated stress can easily cause product cracking. Therefore, in order to avoid premature failure of products in applications, it is necessary to perform stress testing on the cup body.

[0004] At present, the stress of plastic products can be detected by stress meters. However, due to the limitation of light source, it can only be carried out in a limited space. Manual adjustment is required for large-size products. Specifically, the product is placed on the testing table for a period of time, and the stress distribution of the area is generated by calculating the image. The placement of the product is manually adjusted, and then other areas are tested. It is impossible to test the entire product at one time, and automated testing has not yet been realized. Therefore, when testing products, only manual sampling can be carried out, and batch testing cannot be achieved. Summary of the invention

[0005] The purpose of the present invention includes providing a pre-filter cup stress detection system and a pre-filter cup production system, which can realize automatic detection of the pre-filter cup stress without causing damage to the pre-filter cup.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a pre-filter cup stress detection system, comprising a conveying mechanism, wherein one end of the conveying mechanism is provided with an inspection area for placing a pre-filter cup to be detected and a loading mechanical arm for transferring the pre-filter cup to be detected from the inspection area to the conveying mechanism, and the other end of the conveying mechanism is provided with a storage area for placing a pre-filter cup after detection and a unloading mechanical arm for transferring the pre-filter cup from the conveying mechanism to the storage area, and the conveying mechanism is also provided with a stress tester for monitoring the pre-filter cup and a rotatable clamping mechanism for placing the pre-filter cup;

[0008] The loading mechanical arm and the unloading mechanical arm are both provided with a clamping mechanism, and the clamping mechanism comprises a clamping cylinder and flexible fingers.

[0009] In an optional embodiment, more than two stress testers are provided along the conveying mechanism;

[0010] The rotatable clamping mechanism comprises a rotating seat and a positioning seat fixed to the rotating seat, the positioning seat is provided with a placement area for placing the pre-filter cup body, and the rotating seat is sleeved with a gear ring;

[0011] A rack capable of meshing with the gear ring and driving the gear ring to rotate is arranged between the two stress testers connected on the conveying mechanism.

[0012] In an optional embodiment, a gas supply channel is provided in the middle of the rotating seat, a stress-relieving transparent plastic layer is provided on the top of the positioning seat, an air suction port is provided on the stress-relieving transparent plastic layer on the top of the gas supply channel, and a gas suction device is connected to the bottom of the gas supply channel through a pipeline.

[0013] In an optional embodiment, a check valve is provided on the gas delivery channel.

[0014] In an optional embodiment, a bearing is further included, wherein an outer ring of the bearing is fixed on the conveying mechanism, and an inner ring of the bearing is sleeved on the rotating seat.

[0015] In an optional embodiment, a limiting groove is provided on the top of the positioning seat, and the shape and size of the limiting groove are adapted to the shape and size of the cup opening of the pre-filter cup body.

[0016] In an optional embodiment, the flexible finger includes a finger body and a buffer for contacting the pre-filter cup body, the buffer is fixed to the finger body, and a side of the buffer in contact with the pre-filter cup body is provided with an anti-slip structure.

[0017] In an optional embodiment, the buffer member includes a curved surface adapted to the curvature of the surface of the pre-filter cup body, and the curved surface is fixedly connected to the finger body via a first connecting surface and a second connecting surface arranged in the same direction as the pre-filter cup body, and the first connecting surface, the curved surface, the second connecting surface and the finger body are connected in sequence to enclose a buffer space.

[0018] In an optional embodiment, the clamping mechanism is an inflatable clamping mechanism, a first air cavity is provided in the clamping cylinder, a second air cavity is provided in the flexible finger, the first air cavity and the second air cavity are communicated, and both are connected to the pressure control device.

[0019] In a second aspect, the present invention provides a pre-filter cup production system, comprising the pre-filter cup stress detection system described in any one of the aforementioned embodiments.

[0020] The beneficial effects of the pre-filter cup stress detection system and the pre-filter cup production system provided by the embodiments of the present invention include:

[0021] The pre-filter cup stress detection system provided by the present application has a flexible clamping mechanism that can reduce damage to the cup body, and a rotatable clamping mechanism that is conducive to the rotation of the cup body. The combination of the two lays the foundation for the automation of the pre-filter cup stress detection device. During specific operation, the pre-filter cup body is transferred from the inspection area to the rotatable clamping mechanism on the conveying mechanism by the loading robot arm, and then moved forward to the area where the stress tester is located under the drive of the conveying mechanism for stress testing. When a test cannot achieve a 360° test on the pre-filter cup body, the rotatable mounting mechanism is rotated to test the pre-filter cup body again. After the test is completed, the pre-filter cup body is transferred to the storage area by the unloading robot arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the pre-filter cup stress detection system provided in this application;

[0024] Figure 2 A schematic diagram of the structure of the rotatable clamping mechanism provided in this application;

[0025] Figure 3 A schematic diagram of the structure of the rotating seat and the rotating seat provided in this application;

[0026] Figure 4 A schematic diagram of the structure of the clamping mechanism provided in this application;

[0027] Figure 5 A cross-sectional view of the buffer provided in this application.

[0028] Icons: 100-transport mechanism; 200-inspection area; 300-loading robot arm; 400-storage area; 410-qualified area; 420-unqualified area; 500-unloading robot arm; 600-stress tester; 700-rotatable clamping mechanism; 710-rotating seat; 720-gas transmission channel; 721-first gas transmission pipe; 722-accommodating chamber; 723-cone member; 724-guide mesh plate; 725-spring; 726 -second air supply pipe; 730-positioning seat; 740-stress-relieving transparent plastic layer; 750-check valve; 760-gear ring; 770-rack; 780-bearing; 800-clamping mechanism; 810-gripping cylinder; 820-flexible finger; 830-buffer; 831-first connecting surface; 832-arc surface; 833-second connecting surface; 834-buffer space; 835-anti-slip structure; 900-pre-filter cup. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] Please refer to Figure 1 The stress detection system of the pre-filter cup body 900 provided by the present invention comprises a conveying mechanism 100, wherein one end of the conveying mechanism 100 is provided with an inspection area 200 for placing the pre-filter cup body 900 to be detected and a loading robot arm 300 for transferring the pre-filter cup body 900 to be detected from the inspection area 200 to the conveying mechanism 100, and the other end of the conveying mechanism 100 is provided with a storage area 400 for placing the pre-filter cup body 900 after detection and a discharging robot arm 500 for transferring the pre-filter cup body 900 from the conveying mechanism 100 to the storage area 400, and the conveying mechanism 100 is also provided with a stress tester 600 for monitoring the pre-filter cup body 900 and a rotatable clamping mechanism 700 for placing the pre-filter cup body 900;

[0036] The loading robot arm 300 and the unloading robot arm 500 are both provided with a clamping mechanism 800 , and the clamping mechanism 800 includes a clamping cylinder 810 and a flexible finger 820 .

[0037] The detection principle of the stress tester 600 is as follows: light passes through a polarizer and becomes circularly polarized light. When a stressed sample is placed, the slow axis and fast axis of birefringence produce an optical path difference, and the outgoing light becomes elliptically polarized light. By rotating the analyzer, the angle at which the polarized light is affected by stress is measured, thereby calculating the stress magnitude and slow axis direction of the sample. During one measurement, the fully automatic polarizing stress meter takes out an image at a predetermined angle, and can simultaneously obtain the stress magnitude and slow axis direction of all areas of the sample within the visible range, and output the three-dimensional distribution of stress. The stress tester 600 can collect sample images through a computer connected to a camera, and can store measurement data and various images corresponding to the results. The light source uses a high-brightness LED lamp, which has a long life and saves electricity, and can reduce the time and operating cost of replacing the light source.

[0038] The existence of the curved surface of the pre-filter cup body 900 results in a blind spot in the test. During the stress test, the stress test cannot be completed at one time, and the direction of the object needs to be adjusted before all-round detection. At the same time, because the larger the light source, the higher the investment cost, in order to reduce the investment cost of the light source, generally speaking, the arc of the cup body for priority detection is 120-180 degrees. If the cup body needs to be detected at 360 degrees, the cup body needs to be rotated, so a rotatable clamping mechanism 700 is required.

[0039] In addition, the cup body undergoes long-term annealing to make its stress uniform, but the allowable stress is low. In order to avoid damage to the cup body, the clamping mechanism 800 uses flexible fingers 820.

[0040] The pre-filter cup body 900 stress detection system provided by the present application has a flexible clamping mechanism 800 that can reduce damage to the cup body, and a rotatable clamping mechanism 700 that is conducive to the rotation of the cup body. The combination of the two lays the foundation for the automation of the pre-filter cup body 900 stress detection device. During specific operation, the pre-filter cup body 900 is transferred from the inspection area 200 to the rotatable clamping mechanism 700 on the conveying mechanism 100 by the loading robot arm 300, and then moved forward to the area where the stress tester 600 is located under the drive of the conveying mechanism 100 for stress testing. When a test cannot achieve a 360° test on the pre-filter cup body 900, the rotatable mounting mechanism is rotated to test the pre-filter cup body 900 again. After the test is completed, the pre-filter cup body 900 is transferred to the storage area 400 by the unloading robot arm 500. In some embodiments, the storage area 400 can also be divided into a qualified area 410 and an unqualified area 420. The controller of the unloading robot is connected to the signal of the stress detector. When the stress detection result is qualified, the pre-filter cup 900 is transferred to the qualified area 410. When the stress detection result is unqualified, the pre-filter cup 900 is transferred to the unqualified area 420. Specifically, in some embodiments, when the detected stress is higher than the set stress requirement, the equipment indicator light turns yellow and the test is performed again. When the allowable stress at the same position is higher than the set value twice, the equipment indicator light turns red, and the unloading robot arm 500 grabs it and sends it to the unqualified product warehouse.

[0041] In an optional embodiment, more than two stress testers 600 are provided along the conveying mechanism 100;

[0042] The rotatable clamping mechanism 700 includes a rotating seat 710 and a positioning seat 730 fixed to the rotating seat 710, the positioning seat 730 is provided with a placement area for placing the pre-filter cup 900, and the rotating seat 710 is sleeved with a gear ring 760;

[0043] A rack 770 is provided between two stress testers 600 connected to the conveying mechanism 100, which can mesh with the gear ring 760 and drive the gear ring 760 to rotate. Figure 2 shown.

[0044] The number of stress testers 600 can be set as needed. Usually, in order to improve the detection efficiency, several stress testers 600 are set if the cup body needs to be detected several times. When working, after the cup body is detected by a stress tester 600, it moves forward, rotates a specified angle when passing the position where the rack 770 is set, and then moves forward to enter the next stress tester 600. The rotatable clamping mechanism 700 adopts the method of matching the gear and the rack 770, and the rotation angle of the rotatable clamping mechanism 700 can be quantitatively and accurately adjusted according to the detection conditions. Specifically, the rack 770 in this embodiment can be fixed above the conveying mechanism 100 and on one side of the route where the gear ring 760 passes. When the gear ring 760 follows the conveying mechanism 100 and moves forward to the area between the two stress testers 600, it interferes with the rack 770 and rotates. The length of the rack 770 is related to the angle of rotation of the gear ring 760. The greater the angle that the gear ring 760 and the cup body need to rotate, the longer the length of the rack 770 needs to be. Therefore, the length of the rack 770 can be reasonably set according to the angle at which the cup body needs to rotate.

[0045] In an optional embodiment, if Figure 3 As shown, a gas delivery channel 720 is provided in the middle of the rotating seat 710, a stress-relieving transparent plastic layer 740 is provided on the top of the positioning seat 730, a suction port is provided on the stress-relieving transparent plastic layer 740 on the top of the gas delivery channel 720, and a suction device is connected to the bottom of the gas delivery channel 720 through a pipeline.

[0046] The rotatable clamping mechanism 700 uses vacuuming to fix the cup body, and the part in contact with the cup body uses stress-relieving transparent plastic, which can fix the pre-filter cup body 900 while reducing the damage to the cup body caused by the rotatable clamping mechanism 700. When working, the loading robot arm 300 sets the pre-filter cup body 900 with the opening facing downward, and the internal space of the pre-filter cup body 900 is connected to the exhaust device through the air delivery channel 720, and negative pressure is formed inside the pre-filter cup body 900 by exhausting air.

[0047] In an optional embodiment, a check valve 750 is provided on the gas delivery channel, and the check valve 750 can prevent gas backflow. It should be noted that in the present application, when the rotatable clamping mechanism 700 fixes the pre-filter cup 900, the pre-filter cup 900 is in a negative pressure state, and the pressure is sufficient to fix the pre-filter cup 900. If the pressure is too high, it may cause damage to the cup. In some optional embodiments, the gas delivery channel includes a first gas delivery pipe 721, a receiving chamber 722, and a second gas delivery pipe 726, which are sequentially arranged. The first gas delivery pipe 721 is arranged on a side of the receiving chamber 722 close to the stress relief plastic layer, and the second gas delivery pipe 726 is arranged on a side of the receiving chamber 722 away from the stress relief plastic layer. A check valve 750 is arranged in the receiving chamber 722. The check valve 750 includes a cone member 723 whose diameter gradually decreases in a direction away from the stress relief transparent plastic layer 740. A guide mesh plate 724 capable of moving along the inner wall of the receiving chamber 722 is fixedly connected to the cone member 723. A spring 725 capable of pressing the cone structure against the opening of the second gas delivery pipe 726 is arranged between the guide mesh plate 724 and the first gas delivery pipe 721. When it is necessary to evacuate gas, a vacuum pump connector with an ejector pin is connected to the second gas delivery pipe 726 to lift the cone member 723 and conduct gas.

[0048] In an optional embodiment, a bearing 780 is further included, wherein the outer ring of the bearing 780 is fixed on the conveying mechanism 100, and the inner ring of the bearing 780 is sleeved on the rotating seat 710. In some embodiments, the bearing 780 can be selected to have a sealing function to suppress air pressure leakage at the location of the bearing 780, thereby reducing energy waste of the vacuum device.

[0049] In an optional embodiment, a limiting groove is provided on the top of the positioning seat 730 , and the shape and size of the limiting groove are adapted to the shape and size of the cup mouth of the pre-filter cup body 900 , so as to avoid misalignment of the pre-filter cup body 900 .

[0050] In an optional embodiment, if Figure 4 and Figure 5 As shown, the flexible finger 820 includes a finger body and a buffer 830 for contacting the pre-filter cup 900 , the buffer 830 is fixed on the finger body, and a side of the buffer 830 contacting the pre-filter cup 900 is provided with an anti-slip structure 835 .

[0051] The presence of the buffer 830 is beneficial to dispersing the stress between the flexible fingers 820 and the pre-filter cup body 900, and reducing the damage of the flexible fingers 820 to the pre-filter cup body 900 during the clamping step; in addition, in order to avoid slipping and the like between the flexible fingers 820 and the pre-filter cup body 900, which may cause the pre-filter cup body 900 to slide and cause damage, an anti-slip structure 835 is provided on the buffer 830, and the anti-slip structure 835 may specifically be anti-slip protrusions, anti-slip textures, a flexible anti-slip coating, etc.

[0052] In an optional embodiment, the buffer member 830 includes a curved surface 832 adapted to the curvature of the surface of the pre-filter cup body 900, and the curved surface 832 is fixedly connected to the finger body via a first connecting surface 831 and a second connecting surface 833 arranged in the same direction as the pre-filter cup body 900, and the first connecting surface 831, the curved surface 832, the second connecting surface 833 and the finger body are connected in sequence to enclose a buffer space 834.

[0053] In this embodiment, the arc surface 832 can fully contact with the surface of the pre-filter cup body 900, which is conducive to dispersing stress; the existence of the buffer space 834 can play a buffering role, avoiding the sudden increase of the force between the pre-filter cup body 900 and the buffer 830 from causing damage to the pre-filter cup body 900, and at the same time, it can allow the error in the manufacturing process of the pre-filter cup body 900, and is suitable for pre-filter cup bodies 900 of more specifications; the first connecting surface 831 and the second connecting surface 833 can play a supporting role for the arc surface 832 on the one hand, and on the other hand, it is arranged along the axial direction of the pre-filter cup body 900, which is more conducive to dispersing the stress between the buffer 830 and the pre-filter cup body 900 than along the circumferential direction of the pre-filter cup body 900. It should be noted that in this embodiment, the number of buffer spaces 834 can be more than two.

[0054] In an optional embodiment, the clamping mechanism 800 is an inflatable clamping mechanism 800, a first air cavity is provided in the clamping cylinder 810, a second air cavity is provided in the flexible finger 820, the first air cavity and the second air cavity are connected and are both connected to the pressure control device.

[0055] By selecting the inflatable clamping mechanism 800, the air pressure in the first air cavity and the second air cavity can be adjusted by the pressure control device, which is conducive to adjusting the size, hardness and strength of the clamping cylinder 810 and the flexible fingers 820 in the clamping mechanism 800 as needed, reducing damage to the clamping cylinder 810 and the flexible fingers 820, and being suitable for pre-filter cup bodies 900 of different specifications.

[0056] The present invention also provides a pre-filter cup 900 production system, comprising the pre-filter cup 900 stress detection system described in any one of the aforementioned embodiments.

[0057] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A pre-filter cup stress detection system, characterized in that: It comprises a conveying mechanism, one end of which is provided with an inspection area for placing a pre-filter cup body to be inspected and a loading mechanical arm for transferring the pre-filter cup body to be inspected from the inspection area to the conveying mechanism, the other end of which is provided with a storage area for placing a pre-filter cup body after inspection and a discharging mechanical arm for transferring the pre-filter cup body from the conveying mechanism to the storage area, and the conveying mechanism is also provided with a stress tester for monitoring the pre-filter cup body and a rotatable clamping mechanism for placing the pre-filter cup body; The loading mechanical arm and the unloading mechanical arm are both provided with a clamping mechanism, and the clamping mechanism comprises a clamping cylinder and flexible fingers.

2. The pre-filter cup stress detection system according to claim 1, characterized in that: The stress testers are provided with more than two along the conveying mechanism; The rotatable clamping mechanism comprises a rotating seat and a positioning seat fixed to the rotating seat, the positioning seat is provided with a placement area for placing the pre-filter cup body, and the rotating seat is sleeved with a gear ring; A rack capable of meshing with the gear ring and driving the gear ring to rotate is arranged between the two stress testers connected on the conveying mechanism.

3. The pre-filter cup stress detection system according to claim 2, characterized in that: An air delivery channel is arranged in the middle of the rotating seat, a stress-relieving transparent plastic layer is arranged on the top of the positioning seat, an air extraction port is arranged on the stress-relieving transparent plastic layer on the top of the air delivery channel, and an air extraction device is connected to the bottom of the air delivery channel through a pipeline.

4. The pre-filter cup stress detection system according to claim 3, characterized in that: A check valve is arranged on the gas transmission channel.

5. The pre-filter cup stress detection system according to claim 2, characterized in that: It also includes a bearing, the outer ring of the bearing is fixed on the conveying mechanism, and the inner ring of the bearing is sleeved on the rotating seat.

6. The pre-filter cup stress detection system according to claim 2, characterized in that: A limiting groove is arranged on the top of the positioning seat, and the shape and size of the limiting groove are matched with the shape and size of the cup mouth of the pre-filter cup body.

7. The pre-filter cup stress detection system according to claim 1, characterized in that: The flexible finger comprises a finger body and a buffer for contacting the pre-filter cup body, the buffer is fixed on the finger body, and a side of the buffer in contact with the pre-filter cup body is provided with an anti-slip structure.

8. The pre-filter cup stress detection system according to claim 7, characterized in that: The buffer member includes an arcuate surface adapted to the curvature of the surface of the pre-filter cup body, and the arcuate surface is fixedly connected to the finger body through a first connecting surface and a second connecting surface arranged in the same direction as the pre-filter cup body, and the first connecting surface, the arcuate surface, the second connecting surface and the finger body are connected in sequence to enclose a buffer space.

9. The pre-filter cup stress detection system according to claim 8, characterized in that: The clamping mechanism is an inflatable clamping mechanism, a first air cavity is arranged in the clamping cylinder, a second air cavity is arranged in the flexible finger, the first air cavity and the second air cavity are communicated, and both are connected to the pressure control device.

10. A pre-filter cup production system, characterized in that: The invention comprises the pre-filter cup stress detection system as described in any one of claims 1 to 9.

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