Automatic assembly control system for HEPA (High Efficiency Particulate Air)-grade air filter element

Abstract

The utility model belongs to the technical field of automatic control, and particularly discloses an automatic assembly control system for an HEPA-level air filter element. The system comprises a filter cake production unit of which the inlet is connected with a filter material supply port and the outlet is connected with a filter cake cache region; a filter material is processed into a filter cake after entering the filter cake production unit, and the filter cake is conveyed into a filter cake cache region; an inlet of the frame assembling unit is connected with the frame part supply port, and an outlet of the frame assembling unit is connected with an inlet of the filter cake frame assembling unit; frame parts are assembled into a frame after entering the frame assembling unit, and the frame is conveyed to the filter cake frame assembling unit; and the filter cake frame assembling unit is used for clamping and positioning the received frame, and meanwhile, the filter cake is taken from the filter cake cache region and put into the clamped and positioned frame to complete filter element assembling. Therefore, automatic assembly of the HEPA-grade air filter element is achieved, and the assembly efficiency of the filter element is improved.

Description

Technical Field

[0001] This application belongs to the field of automation control technology, and more specifically, relates to an automated assembly control system for HEPA-grade air filters. Background Technology

[0002] Currently, air filters are crucial components for air filtration. With the improvement of people's living standards and the continuous improvement of industrial production environments, higher demands are being placed on air cleanliness. As a consumable equipment, air filters are in huge demand and are widely used in industries such as power, petrochemicals, pharmaceuticals, electronics, and animal husbandry and agriculture. The need for efficient production and high-quality products also places higher demands on companies' filter manufacturing and assembly capabilities. HEPA (High Efficiency Particulate Air Filter) grade air filters are high-efficiency air filters, achieving an effective interception rate of 99.97% for 0.3-micron particles. HEPA filters are mainly assembled from a high-efficiency filter cake and a filter frame. During the production process, defects such as filter cake breakage and frame deformation may occur. These defects may affect the quality and usability of the product, thus affecting the air cleanliness of the working environment. Therefore, strict quality testing and control must be carried out during the production process of HEPA filters.

[0003] Currently, the assembly of traditional HEPA-grade air filters mainly relies on manual labor, and the production efficiency depends on the operator's skill level, resulting in low production efficiency. Utility Model Content

[0004] In view of the above-mentioned defects or improvement needs of the existing technology, this application provides an automated assembly control system for HEPA-grade air filter elements, which aims to solve the technical problem of low efficiency of existing manual assembly.

[0005] To achieve the above objectives, in a first aspect, this application provides an automated assembly control system for HEPA-grade air filters, comprising:

[0006] The filter cake production unit has an inlet connected to a filter media supply port and an outlet connected to a filter cake buffer area; it is used to process filter media into filter cakes and transfer the filter cakes to the filter cake buffer area.

[0007] The frame assembly unit has an inlet connected to the frame parts supply port and an outlet connected to the inlet of the filter cake frame assembly unit; it is used to assemble the frame parts into a frame and transfer the frame to the filter cake frame assembly unit.

[0008] The filter cake frame assembly unit is used to clamp and position the frame, and to take the filter cake from the filter cake buffer area and put it into the clamped and positioned frame to complete the filter element assembly.

[0009] The filter cake production unit includes: a first conveyor line, a pleating machine, a slitting machine, and a liner assembly machine;

[0010] The upstream of the first transmission line is located at the entrance of the filter cake production unit, and the downstream is located at the exit of the filter cake production unit; between the upstream and downstream of the first transmission line, a pleating machine, a slitting machine, and a screen lining assembly machine are arranged in sequence.

[0011] The pleating machine is used to continuously fold the unfolded filter material to form a filter cake substrate when the unfolded filter material is conveyed to the working area of ​​the pleating machine by the first transmission line.

[0012] The slitting machine is used to cut the filter cake substrate into multiple filter cakes when the filter cake substrate is conveyed to the working area of ​​the slitting machine by the first transmission line;

[0013] The liner assembly machine is used to cover the surface of the filter cake with a liner when the filter cake is transported to the working area of ​​the liner assembly machine by the first transmission line.

[0014] The pleating machine includes an indentation device, a glue application device, and a pleating device arranged sequentially along the running direction of the first transmission line;

[0015] The indentation device is used to create parallel indentations on the upper and lower surfaces of the filter material at a preset fixed width when the flat filter material is transported to the working area of ​​the indentation device by the first transmission line.

[0016] The adhesive coating device is used to spray adhesive onto the indentation when the filter material that has indented is transported to the working area of ​​the adhesive coating device by the first transmission line.

[0017] The pleating device is used to pleat the filter material when the filter material after being coated with adhesive is transported to the working area of ​​the pleating device by the first transmission line, so that the filter material is folded along the indentation, and the adhesive is used to fix the folded part to form a filter cake substrate.

[0018] The slitting machine also includes an infrared measuring device located at the top of the slitting machine. The infrared measuring device is used to measure the size of the filter cake and determine whether the size of the filter cake meets the production requirements.

[0019] The frame assembly unit includes: a second transmission line, a first robotic arm, and the assembly machine;

[0020] The upstream of the second transmission line is located at the entrance of the frame assembly unit, and the downstream is located at the exit of the frame assembly unit; between the upstream and downstream of the second transmission line, a first robotic arm and an assembly machine are arranged in sequence.

[0021] The first robotic arm is used to grab the bottom side plate and reinforcing spacer from the upstream of the second transmission line and place them in the pre-assembly position in the assembly machine;

[0022] The assembly machine is used to assemble the bottom side plates and reinforcing spacers into a frame by applying pressure.

[0023] The assembly machine includes a positioning detection device for detecting whether the bottom side plate or reinforcing spacer has reached its respective pre-assembly position. The positioning detection device includes multiple pairs of first positioning lasers and multiple pairs of second lasers. The transmitting and receiving ends of the first positioning lasers are respectively arranged at the upper and lower ends of the pre-assembly position, and the transmitting and receiving ends of the second positioning lasers are respectively arranged at the upper and lower ends of the position outside the pre-assembly. When the receiving end of the second positioning laser receives a laser signal and the receiving end of the first positioning laser does not receive a laser signal, it is determined that the bottom side plate or reinforcing spacer has reached its respective pre-assembly position.

[0024] The assembly machine also includes a gap detection device, which is used to detect whether the frame is installed in place. The gap detection device includes a gap emitter installed directly above the gap and a gap receiver installed directly below the gap. The gap detection device determines the width of the installation gap between the bottom side plate and the reinforcing strip in the frame based on the light intensity received by the gap receiver. If the width is less than the installation tolerance, the frame is determined to be installed in place.

[0025] The assembly machine also includes a collimation detection device, which is used to detect whether the bottom side plate or reinforcing spacer is qualified. The collimation detection device includes multiple collimating lasers and multiple collimating receivers. The collimating lasers are arranged in a straight line above the pre-assembly position. The collimating receivers are arranged in a straight line below the pre-assembly position and are located directly opposite the collimating lasers. When the bottom side plate or reinforcing spacer reaches the pre-assembly position and the received light intensity of all collimating receivers is uniform, the bottom side plate or reinforcing spacer is judged to be qualified.

[0026] The filter cake frame assembly unit includes: a clamping and positioning platform and a second robotic arm;

[0027] The clamping and positioning table is located at the entrance of the filter cake frame assembly unit and is used to clamp and position the frame that is transferred into the clamping and positioning table.

[0028] The second robotic arm is located next to the clamping and positioning platform and is used to remove the filter cake from the filter cake buffer area and place it into the frame to complete the filter element assembly.

[0029] The clamping and positioning platform includes a bottom side plate clamp and a reinforcing spacer clamp. The bottom side plate clamp is used to press and fix the bottom side plate; the reinforcing spacer clamp is used to expand and shape the reinforcing spacer. By pressing the bottom side plate and expanding and shaping the reinforcing spacer, the frame is made to be in an expanded state in a fixed position.

[0030] Overall, the technical solutions conceived in this application have the following beneficial effects compared with the prior art:

[0031] (1) The automated system of this application realizes the automated assembly of HEPA-grade air filter elements. The filter element assembly process does not require manual intervention and is fully automated, thereby improving the filter element assembly efficiency.

[0032] (2) The automated system of this application includes a filter cake size detection device, a frame part positioning detection device, a frame interval detection device and a frame part alignment detection device. During the automatic assembly process, quality inspection is carried out for multiple assembly processes, and assembly quality control and filter element size control are realized during the assembly process. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the automated assembly and control system for HEPA-grade air filters provided in this application embodiment.

[0034] Figure 2 This is a schematic diagram of the filter material provided in the embodiments of this application being indented and coated with adhesive.

[0035] Figure 3 This is a schematic diagram of cutting the filter cake substrate according to an embodiment of this application.

[0036] Figure 4 This is a schematic diagram of the positioning and detection of the bottom side plate and reinforcing strip provided in the embodiments of this application.

[0037] Figure 5 This is a schematic diagram of the gap detection between the bottom side plate and the reinforcing strip provided in the embodiment of this application.

[0038] Figure 6 This is a schematic diagram of the alignment test of the bottom side plate and the reinforcing strip provided in the embodiment of this application.

[0039] Figure 7 This is a schematic diagram of the filter element structure provided in the embodiments of this application.

[0040] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0041] 1 is the filter cake production unit; 11 is the pleating machine; 12 is the slitting machine; 13 is the liner assembly machine; 2 is the frame assembly unit; 21 is the first robotic arm; 22 is the assembly machine; 221 is the first positioning laser; 222 is the second positioning laser; 223 is the collimating laser; 224 is the collimating receiver; 3 is the filter cake frame assembly unit; 31 is the clamping and positioning table; 32 is the second robotic arm; 41 is the first transmission line; 42 is the second transmission line; 5 is the filter material; 51 is the crease; 52 is the adhesive; 6 is the filter cake substrate; 61 is the filter cake; 71 is the reinforcing spacer; 72 is the bottom side plate; 73 is the installation gap. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0043] The terms "first" and "second," etc., used in the specification and claims herein are used to distinguish different objects, not to describe a specific order of objects. For example, "first transmission line" and "second transmission line," etc., are used to distinguish different transmission lines, not to describe a specific order of transmission lines.

[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple collimators refer to two or more collimators; multiple collimators refer to two or more collimators.

[0046] The embodiments of this application are described below with reference to the accompanying drawings. Figure 1 As shown in the figure, an automated assembly and control system for HEPA-grade air filters according to an embodiment of this application includes a filter cake production unit 1, a frame assembly unit 2, and a filter cake frame assembly unit 3, wherein:

[0047] The inlet of filter cake production unit 1 is connected to the filter media supply port, and its outlet is connected to the filter cake buffer area. At the filter media supply port, the rolled filter media is unrolled and transported to the inlet of filter cake production unit 1 via a conveyor line.

[0048] After the filter media enters the filter cake production unit 1, it is processed into filter cake. The filter cake is then transported by a conveyor line to the filter cake buffer area to prepare for the next step of filter cake frame assembly.

[0049] like Figure 1 As shown, the filter cake production unit 1 includes a first conveyor line 41, a pleating machine 11, a slitting machine 12, and a liner assembly machine 13, wherein:

[0050] The upstream of the first transmission line 41 is located at the entrance of the filter cake production unit 1, and the downstream is located at the exit of the filter cake production unit 1. Between the upstream and downstream of the first transmission line 41, a pleating machine 11, a slitting machine 12, and a screen lining assembly machine 13 are arranged in sequence. Thus, the filter material is processed sequentially by the pleating machine 11, the slitting machine 12, and the screen lining assembly machine 13 during its transmission on the first transmission line 41, and finally becomes a filter cake.

[0051] When the unfolded filter material 5 is conveyed to the working area of ​​the pleating machine 11 by the first transmission line 41, the pleating machine 11 continuously folds the filter material to form a filter cake substrate 6; the pleating machine 11 includes an indentation device, a glue coating device and a pleating device arranged sequentially along the running direction of the first transmission line.

[0052] When the filter media 5 is conveyed to the working area of ​​the indentation device by the first transmission line 41, the indentation device generates parallel indentations 51 on the upper and lower surfaces of the filter media according to a preset fixed width.

[0053] like Figure 2 As shown, in this embodiment, the upper and lower surfaces of the filter material 5 are folded in opposite directions to form indentations 51, with the upper surface folded upwards to form an indentation 51 and the lower surface folded downwards to form an indentation 51.

[0054] In this embodiment, the preset fixed width w is determined by production requirements; the larger the width w, the thicker the filter cake produced.

[0055] When the filter material 5 that produces the indentation 51 is conveyed to the working area of ​​the adhesive coating device by the first transmission line 41, the adhesive coating device sprays adhesive 52 onto the indentation.

[0056] like Figure 2 As shown, in this embodiment, the adhesive spraying device sprays adhesive 52 at the indentation 51. In other embodiments, adhesive is sprayed at the non-crease area, and the filter material can also be folded and fixed by adhesive.

[0057] When the filter material 5 after being coated with adhesive is transported to the working area of ​​the pleating device by the first transmission line, the pleating device pleats the filter material 5, causing the filter material 5 to fold along the indentation 51, and the adhesive 52 fixes the folded part to form the filter cake substrate 6.

[0058] like Figure 3As shown, the filter cake substrate 6 is formed by folding and fixing the filter material 5, and the thickness of the filter cake substrate 6 is determined by the width w of the fold.

[0059] When the filter cake substrate 6 is conveyed to the working area of ​​the slitting machine 12 by the first transmission line 41, the slitting machine 12 cuts the filter cake substrate 6 into multiple filter cakes 61.

[0060] like Figure 3 As shown, in this embodiment, the filter cake substrate 6 is cut at intervals h to obtain a filter cake 61 with a length of h.

[0061] In this embodiment, the slitting machine 12 includes an infrared measuring device located at the top of the slitting machine 12. The infrared measuring device is used to measure the size of the filter cake 61, determine whether the size of the produced filter cake 61 meets the production requirements, and make timely size adjustments.

[0062] The infrared measuring device emits infrared light to both ends of the filter cake 61 along its length, and demodulates the length h of the filter cake 61 based on the time of the returned infrared light.

[0063] Finally, when the filter cake 61 is conveyed to the working area of ​​the liner assembly machine 13 by the first transmission line 41, the liner assembly machine 13 covers the surface of the filter cake 61 with the liner.

[0064] like Figure 1 As shown, the frame assembly unit 2 includes a second transmission line 42, a first robotic arm 21, and an assembly machine 22, wherein:

[0065] The second transmission line 42 has its upstream located at the entrance of the frame assembly unit 2 and its downstream located at the exit of the frame assembly unit 3. Between the upstream and downstream of the second transmission line 42, the first robotic arm 21 and the assembly machine 22 are arranged sequentially.

[0066] The entrance of the frame assembly unit 2 is connected to the frame parts supply point. After the frame parts enter the entrance of the frame assembly unit 2, they are first transferred to the first robot arm 21 by the second transmission line 42.

[0067] The first robotic arm 21 picks up the bottom side plate 72 and the reinforcing spacer 71 from the upstream of the second transmission line 42 and places them in the pre-assembly position in the assembly machine 22.

[0068] In this embodiment, the frame parts are placed at a fixed position on the second transmission line 42, and the second transmission line 42 will transport the frame parts to a fixed position attached to the first robot arm 21. The pre-assembly position in the assembly machine 22 is also fixed. Therefore, as long as a program is preset for the first robot arm 21 to allow the first robot arm 21 to pick up and put down the frame parts according to a fixed trajectory, the frame parts can be accurately placed into the pre-assembly position in the assembly machine 22.

[0069] In other embodiments, the first robotic arm 21 can also be controlled by visual recognition technology to place the frame parts into the pre-assembly position.

[0070] After the frame parts arrive at their pre-assembly positions, they still need to undergo several inspections, including:

[0071] The positioning detection is completed by the positioning detection device in the assembly machine 22. The positioning detection device is used to detect whether the bottom side plate 72 and the reinforcing strip 71 have reached their respective pre-assembly positions.

[0072] like Figure 4 As shown, in this embodiment, the positioning detection device includes 6 pairs of positioning lasers. The transmitting and receiving ends of 3 pairs of positioning lasers 222 are respectively arranged at the upper and lower ends of the pre-assembly position, and the transmitting and receiving ends of the other 3 pairs of positioning lasers 221 are respectively arranged at the upper and lower ends of the position outside the pre-assembly.

[0073] In this way, when the receiving end of the positioning laser 221 receives a laser signal and the receiving end of the positioning laser 222 does not receive a laser signal, it can be determined that the bottom side plate 72 and the reinforcing spacer 71 have reached their respective pre-assembly positions.

[0074] The detection principle is that the emitting and receiving ends of the positioning laser 222 are respectively arranged at the upper and lower ends of the pre-assembly position. Thus, when the frame part arrives at the pre-assembly position, it will block the receiving end of the positioning laser 222 from receiving the light signal. Furthermore, since the emitting and receiving ends of the other positioning lasers 221 are respectively arranged at the upper and lower ends of positions outside the pre-assembly, the frame part will not block the receiving end of the positioning laser 221 from receiving the light signal. Therefore, when the receiving end of the positioning laser 221 receives a laser signal, and the receiving end of the positioning laser machine 222 does not receive a laser signal, it can be determined that the frame part has arrived at its respective pre-assembly position. In other embodiments, more positioning lasers can be used for part positioning detection.

[0075] The alignment test is performed by the alignment test device in the assembly machine 22. This device is used to check whether the bottom side plate 72 or the reinforcing spacer 71 is qualified. Figure 6 As shown, in this embodiment, the collimation detection device includes three collimating lasers 223 and three collimating receivers 224. The three collimating lasers 223 are arranged in a straight line above the pre-assembly position; the three collimating receivers 224 are arranged in a straight line below the pre-assembly position, directly opposite the collimating lasers 223. When the bottom side plate 72 or the reinforcing spacer 71 reaches the pre-assembly position, and the received light intensity of all collimating receivers 224 is uniform, the bottom side plate 72 or the reinforcing spacer 71 is deemed qualified.

[0076] The detection principle is as follows: when the reinforcing spacer 71 is straight, the multiple collimated lasers 223 arranged along the straight line will be completely blocked, and the light signals received by all collimated receivers 224 will be relatively weak and uniform. When the reinforcing spacer 71 is not straight, the multiple collimated lasers 223 arranged in the straight line will not be completely blocked, and the light signals received by the multiple collimated receivers 224 will be uneven in strength. In other embodiments, more collimated lasers 223 and collimated receivers 224 can be used for detection.

[0077] After multiple checks confirming the parts are correct, the assembly machine 22 uses pressure to assemble the bottom side plate 72 and reinforcing spacer 71 into a frame. Subsequently, it is necessary to check whether the frame assembly is up to standard.

[0078] The gap detection device in assembly machine 22 detects the gaps generated during the assembly process to determine whether the assembly is qualified. If the gap is too large, it is unqualified; otherwise, it is qualified.

[0079] The gap detection device includes a gap emitter mounted directly above the gap 73 and a gap receiver mounted directly below the gap, such as... Figure 5 As shown, the gap detection device determines the width of the gap 73 between the bottom side plate 72 and the reinforcing strip 71 in the frame based on the intensity of the light received by the gap receiver. When the width is less than the installation tolerance, the frame is determined to be installed in place.

[0080] The detection principle is that when the gap is too large, there will be more light signals passing through the gap, and vice versa. Therefore, by detecting the intensity of the light signals passing through the gap, the size of the gap can be determined.

[0081] like Figure 1 As shown, the inlet of the frame assembly unit 2 is connected to the frame parts supply port, and the outlet is connected to the inlet of the filter cake frame assembly unit 3; after the frame parts enter the frame assembly unit 2, they are assembled into a frame, and the frame is transferred to the filter cake frame assembly unit 3.

[0082] The filter cake frame assembly unit 3 clamps and positions the received frame, and simultaneously retrieves the filter cake from the filter cake buffer area and places it into the clamped and positioned frame to complete the filter element assembly. The filter cake frame assembly unit 3 includes a clamping and positioning platform 31 and a second robotic arm 32, wherein:

[0083] The clamping and positioning table 31 is located at the entrance of the filter cake frame assembly unit 3. After the frame is transferred to the filter cake frame assembly unit 3, it enters the clamping and positioning table 31, which clamps and positions the frame. The clamping and positioning table 31 includes a bottom side plate clamp and a reinforcing spacer clamp. The bottom side plate clamp is used to press and fix the bottom side plate 72; the reinforcing spacer clamp is used to expand and shape the reinforcing spacer 71. By pressing the bottom side plate 72 and expanding the reinforcing spacer 71, the frame is kept in an expanded state in a fixed position, ensuring that the filter cake can smoothly enter the frame.

[0084] The second robotic arm 32 is located next to the clamping and positioning table 31 and is used to remove the filter cake 61 from the filter cake buffer area and place it into the frame to complete the filter element assembly. Figure 7 The image shows the assembled filter element.

[0085] Since the frame is clamped and positioned in a fixed position by the clamping and positioning table 31, and the filter cake is also placed in a fixed position, in this embodiment, the preset program controls the second robot arm 32 to grab and put down the filter cake along a fixed trajectory, thereby realizing the placement of the filter cake in the fixed position into the frame in the fixed position and realizing the assembly of the filter element.

[0086] In other embodiments, the second robotic arm 32 can also be controlled by visual recognition technology to assemble the filter element into the frame.

[0087] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0088] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0089] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0090] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An automated assembly and control system for HEPA-grade air filter elements, characterized in that, include; The filter cake production unit (1) has an inlet connected to the filter media supply port and an outlet connected to the filter cake buffer area; it is used to process the filter media (5) into filter cakes (61) and transfer the filter cakes (61) to the filter cake buffer area. The frame assembly unit (2) has its inlet connected to the frame parts supply port and its outlet connected to the inlet of the filter cake frame assembly unit (3); it is used to assemble the frame parts into a frame and transfer the frame to the filter cake frame assembly unit (3). The filter cake frame assembly unit (3) is used to clamp and position the frame, and to take the filter cake (61) from the filter cake buffer area and put it into the clamped and positioned frame to complete the filter element assembly.

2. The automated assembly control system for HEPA-grade air filters according to claim 1, characterized in that, The filter cake production unit (1) includes: a first transmission line (41), a pleating machine (11), a slitting machine (12), and a liner assembly machine (13). The upstream of the first transmission line (41) is located at the entrance of the filter cake production unit (1), and the downstream is located at the exit of the filter cake production unit (1). Between the upstream and downstream of the first transmission line (41), a pleating machine (11), a slitting machine (12) and a lining mesh assembly machine (13) are arranged in sequence. The pleating machine (11) is used to continuously fold the unfolded filter material (5) to form a filter cake substrate (6) when the unfolded filter material (5) is conveyed to the working area of ​​the pleating machine (11) by the first transmission line (41). The slitting machine (12) is used to cut the filter cake substrate (6) into multiple filter cakes (61) when the filter cake substrate (6) is transported to the working area of ​​the slitting machine (12) by the first transmission line (41). The liner assembly machine (13) is used to cover the surface of the filter cake (61) with a liner when the filter cake (61) is transported to the working area of ​​the liner assembly machine (13) by the first transmission line (41).

3. The automated assembly and control system for HEPA-grade air filters according to claim 2, characterized in that, The pleating machine (11) includes an indentation device, a glue application device and a pleating device arranged sequentially along the running direction of the first transmission line (41); The indentation device is used to generate parallel indentations (51) on the upper and lower surfaces of the filter material (5) at a preset fixed width when the flat filter material (5) is transported to the working area of ​​the indentation device by the first transmission line (41). The adhesive coating device is used to spray adhesive (52) onto the indentation (51) when the filter material (5) that produces the indentation (51) is transported to the working area of ​​the adhesive coating device by the first transmission line (41). The pleating device is used to pleat the filter material (5) when the filter material (5) after being sprayed with adhesive (52) is transported to the working area of ​​the pleating device by the first transmission line (41), so that the filter material (5) is folded along the indentation (51), and the adhesive (52) fixes the folded part to form a filter cake substrate (6).

4. The automated assembly and control system for HEPA-grade air filters according to claim 2, characterized in that, The slitting machine (12) also includes an infrared measuring device, which is located at the top of the slitting machine (12) and is used to measure the size of the filter cake and determine whether the size of the filter cake meets the production requirements.

5. The automated assembly control system for HEPA-grade air filters according to claim 1, characterized in that, The frame assembly unit (2) includes: a second transmission line (42), a first robotic arm (21) and the assembly machine (22). The upstream of the second transmission line (42) is located at the entrance of the frame assembly unit (1), and the downstream is located at the exit of the frame assembly unit (3); between the upstream and downstream of the second transmission line (42), a first robotic arm (21) and an assembly machine (22) are arranged in sequence. The first robotic arm (21) is used to grab the bottom side plate (72) and the reinforcing spacer (71) from the upstream of the second transmission line (42) and place them in the pre-assembly position in the assembly machine (22); The assembly machine (22) is used to assemble the bottom side plate (72) and the reinforcing spacer (71) into a frame by applying pressure.

6. The automated assembly control system for HEPA-grade air filters according to claim 5, characterized in that, The assembly machine (22) includes a positioning detection device, which is used to detect whether the bottom side plate (72) or the reinforcing partition (71) has reached its respective pre-assembly position. The positioning detection device includes multiple pairs of first positioning lasers (222) and multiple pairs of second lasers (221). The transmitting end and receiving end of the first positioning laser (222) are respectively arranged at the upper and lower ends of the pre-assembly position, and the transmitting end and receiving end of the second positioning laser (221) are respectively arranged at the upper and lower ends of the position outside the pre-assembly. When the receiving end of the second positioning laser (221) receives a laser signal and the receiving end of the first positioning laser (222) does not receive a laser signal, it is determined that the bottom side plate (72) or the reinforcing partition (71) has reached its respective pre-assembly position.

7. The automated assembly control system for HEPA-grade air filters according to claim 5, characterized in that, The assembly machine (22) also includes a gap detection device, which is used to detect whether the frame is installed in place. The gap detection device includes a gap emitter installed directly above the gap (73) and a gap receiver installed directly below the gap. The gap detection device determines the width of the installation gap (73) between the bottom side plate (72) and the reinforcing strip (71) in the frame based on the intensity of the light received by the gap receiver. If the width is less than the installation tolerance, the frame is determined to be installed in place.

8. The automated assembly control system for HEPA-grade air filters according to claim 5, characterized in that, The assembly machine (22) also includes a collimation detection device, which is used to detect whether the bottom side plate (72) or the reinforcing spacer (71) is qualified. The collimation detection device includes multiple collimating lasers (223) and multiple collimating receivers (224). The collimating lasers (223) are arranged in a straight line above the pre-assembly position. The collimating receivers (224) are arranged in a straight line below the pre-assembly position and are located directly opposite the collimating lasers (223). When the bottom side plate (72) or the reinforcing spacer (71) reaches the pre-assembly position, and the received light intensity of all the collimating receivers (224) is uniform, the bottom side plate (72) or the reinforcing spacer (71) is qualified.

9. The automated assembly control system for HEPA-grade air filters according to claim 1, characterized in that, The filter cake frame assembly unit (3) includes: a clamping and positioning table (31) and a second robotic arm (32); The clamping and positioning table (31) is located at the entrance of the filter cake frame assembly unit (3) and is used to clamp and position the frame that is transferred into the clamping and positioning table (31). The second robotic arm (32) is located next to the clamping and positioning table (31) and is used to take out the filter cake (61) from the filter cake buffer area and put it into the frame to complete the filter element assembly.

10. The automated assembly control system for HEPA-grade air filters according to claim 1, characterized in that, The clamping and positioning platform (31) includes a bottom side plate clamp and a reinforcing strip clamp. The bottom side plate clamp is used to press and fix the bottom side plate (72). The reinforcing strip clamp is used to expand and shape the reinforcing strip (71). By pressing the bottom side plate (72) and expanding and shaping the reinforcing strip (71), the frame is in an expanded state at a fixed position.

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