An automatic bolt gasket assembly machine

Abstract

The invention discloses an automatic bolt and gasket assembly machine, which relates to the technical field of gasket assembly, comprising a turntable, an edge of which is provided with a bolt feeding module, a gasket assembly module and a discharging module. The bolt feeding module, the turntable edge is provided with a positioning groove, the limit strip is located at the turntable edge and follows the shape, cooperates with the positioning groove to position the bolt, and one end is used for bolt guidance, the gasket pressing module comprises a stacking barrel located just above the corresponding positioning groove, the top of the stacking barrel is connected to the vibration plate track for conveying the gasket, at least three groups of rotating rods are arranged along the circumference of the outer wall bottom of the stacking barrel, and a push plate and a bearing plate are fixedly connected to the rotating rod axially from top to bottom in sequence, the push plate is provided with a tooth mouth, and the bearing plate is located below the tooth mouth. The automatic bolt and gasket assembly machine can effectively separate the gaskets through the stacking barrel, the push plate and the bearing plate, and also avoids the phenomenon that the narrow space is easy to cause blockage, so that the stability of the gasket assembly is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of gasket assembly, and particularly to an automatic bolt gasket assembly machine. Background Art

[0002] Bolts and gaskets are commonly used connecting parts in mechanical connections. When used in combination, they have the advantages of reliable and convenient connection. A large number of bolts and gaskets are required in the production of many devices, so bolt gasket assembly machines have emerged as the times require.

[0003] Some prior arts disclose machines for automatic assembly of bolts and gaskets. For example, the bolt gasket automatic installation device disclosed in Patent Publication No. CN105798602B can achieve automatic assembly of bolts and gaskets, but the positioning of its bolts is not stable enough. The bolts slide down obliquely on the guiding surface and then enter the track carriage with a vertically upward opening. In this process, there is a problem of adjusting the axis angle of the bolts. Moreover, since the rod part of the bolt has threads, when the end of the bolt rod reaches the port edge of the track carriage in an inclined state, the threads will first contact the port edge of the track carriage, resulting in a problem of being jammed. The same is true for the bolt gasket assembly device disclosed in Publication No. CN102990351B. Both the gasket and the bolt have the above problems. In the process of the gasket entering the gasket groove from the gasket guiding groove, only one gasket can be present at a time. Otherwise, the latter gasket will be lifted by the former gasket. Also, because the mass of the gasket itself is small and the space above the gasket groove is narrow, the gasket may be inclined and jammed between the gasket guiding groove and the gasket groove. On the other hand, for the T-shaped opening provided in the upper part of the bolt conduit, in order to keep the axis of the bolt vertical, the inner diameter of the bolt conduit can only be slightly larger than the maximum diameter of the bolt head. If it is too large, the axis of the bolt will not be vertical, resulting in the loss of the positioning function and inability to align with the central hole of the gasket. For this reason, the loading of bolts is relatively slow and requires precise alignment. Otherwise, the bolt will be tilted and jammed by the edge of the T-shaped opening at the top. Therefore, we propose an automatic bolt gasket assembly machine. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic bolt gasket assembly machine to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An automatic bolt gasket assembly machine, including a turntable, and at least a bolt feeding module, a gasket assembly module, and a discharging module are sequentially arranged along the rotation direction on its edge;

[0006] The bolt feeding module screens and guides bolts through a vibrating bowl and inverts the bolts onto the turntable through a guide rail;

[0007] The discharging module transports the assembled body of the bolt and the gasket to the designated placement area through a robotic arm;

[0008] The edge of the turntable is evenly spaced with a number of positioning grooves with edge openings for inverted bolts, and the spacing between the bolt feeding module, the gasket assembly module, the gasket pressing module, the virtual position detection module and the unloading module is an integer multiple of the spacing between two adjacent positioning grooves;

[0009] The limit bar is located at the edge of the turntable and follows the shape, cooperates with the positioning groove to locate the bolt, and one end is used for bolt guidance;

[0010] The gasket pressing module includes a stacking barrel located directly above the corresponding positioning groove, the top of the stacking barrel is connected to the vibration plate track for conveying the gasket, at least three groups of rotating rods are arranged along the circumference of the bottom of the outer wall of the stacking barrel, and the sum of the angles between the three groups of rotating rods is greater than 180°, and a push plate and a bearing plate are fixedly connected to the rotating rod along the axial direction from top to bottom in sequence, the push plate is provided with a tooth mouth, and the bearing plate is located below the tooth mouth, the thickness of the push plate is less than or equal to the thickness of a single gasket assembled, and when the rotating rod rotates, the lowest gasket falls from the tooth mouth on the push plate to the bearing plate, and then falls from the bearing plate to the bolt rod for assembly.

[0011] Preferably, a tray is fixed on the rotating rod, and the tray is located below the carrying plate. When the rotating rod rotates, the gasket is detached from the carrying plate and is received by the tray. A push plate is also fixed on the rotating rod, and the upper surface is higher than the upper surface of the tray by at least one gasket thickness. The outer diameter surface of each push plate contacts the outer diameter surface of the gasket and rotates to make the gasket suspended in the air.

[0012] Preferably, the outer wall of the rotating rod is connected to a push plate 2 in an axially sliding manner thereof. The push plate 2 is initially at the same height as the push plate 1. As the rotating rod rotates, the gasket is transferred from the outer diameter surface of the push plate 1 to the outer diameter surface of the push plate 2. The rotating rod is hollow and a fixing rod extending into the rotating rod is also fixed to the outer wall of the stacking barrel. A non-full-circle spiral guide is provided on the fixing rod and the inner wall of the push plate 2, so that the push plate 2 gradually moves downward as the rotating rod rotates to insert the gasket into the bolt rod. A spring is provided between the push plate 2 and the rotating rod. After the gasket is inserted into the bolt, the push plate 2 is reset.

[0013] Preferably, the outer diameter surface of the push plate 1 and / or the push plate 2 is provided with an inner groove.

[0014] Preferably, the bolt feeding module is provided with a second sensor for detecting the bolts at its corresponding positioning groove.

[0015] Preferably, the rotating rod is movably arranged along the radial direction of the stacking cylinder.

[0016] Preferably, the distance between the carrying plate and the tray along the axial direction of the rotating rod is three to ten gasket thicknesses.

[0017] Preferably, it further includes a gasket pressing module, which is composed of a pressing cylinder that can move up and down above the corresponding positioning groove, pressing the gasket towards the nut end of the bolt. The gasket pressing module is located between the gasket assembling module and the discharging module.

[0018] Preferably, it further includes a void detection module arranged between the gasket pressing module and the discharging module, which is composed of a sensor I arranged above the corresponding positioning groove to detect the height of the gasket after pressing.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] Through the stacking cylinder, the pushing disk and the bearing disk, the present invention can effectively separate the gaskets, and at the same time avoid the phenomenon of blockage easily caused by narrow space, making the stability of gasket assembly higher;

[0021] By setting the tray and the first pushing disk, the present invention can assemble the gasket onto the bolt rod more stably and accurately. The first pushing disk can position and calibrate the gasket, thus making its accuracy better;

[0022] Through the second pushing disk that can move up and down during rotation, during installation, the gasket can be fed onto the bolt rod instead of falling, that is, the stability and efficiency of installing the gasket are better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 is a schematic diagram of the structure on the rotating rod of the present invention;

[0025] Figure 3 is Figure 2 a schematic diagram of the structure from another perspective;

[0026] Figure 4 is an exploded view of the structure on the rotating rod;

[0027] Figure 5 is a schematic diagram of the top view state of the rotating rod of the gasket assembling module;

[0028] Figure 6 is a schematic diagram of the state of the bearing disk carrying the gasket;

[0029] Figure 7 is a schematic diagram of the state of the tray carrying the gasket;

[0030] Figure 8 is a schematic diagram of the state where the first pushing disk holds the gasket;

[0031] Figure 9 is a front view of the state where the tray holds the gasket and its position relative to the bolt;

[0032] Figure 10 Front view of the state where the second push plate holds the gasket and the position of the bolt.

[0033] In the figure: 1 - turntable; 101 - positioning groove; 2 - limiting strip; 3 - palletizing cylinder; 4 - rotating rod; 5 - pushing and blocking plate; 501 - tooth; 6 - bearing plate; 7 - pressing cylinder; 8 - sensor 1; 9 - tray; 10 - first push plate; 11 - second push plate; 12 - fixing rod; 13 - spring; 14 - sensor 2; 001 - inner groove. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present invention provides a technical solution: an automatic bolt gasket assembling machine, including:

[0036] The turntable 1 is in a disc shape, and a drive is provided at the center of the bottom of the turntable 1. The turntable 1 is rotated by the drive. The upper surface of the turntable 1 is provided with a positioning groove 101. The positioning groove 101 is in a U shape and is evenly distributed on the edge of the positioning groove 101, with the opening facing outward. The turntable 1 is Figure 1 in the counterclockwise rotation state as shown, and a bolt feeding module, a gasket assembling module and a discharging module are sequentially arranged in the counterclockwise direction. The distance between each module is an integer multiple of the distance between two adjacent positioning grooves 101, and one module corresponds to one positioning groove 101;

[0037] The bolt feeding module mainly orients the disordered bolts through a vibrating disk and transports them to the corresponding positioning groove 101 through a track. The bolts are transported to the corresponding positioning groove 101 in an inverted state and enter the next process with the rotation of the turntable 1;

[0038] A limiting strip 2 is arranged along the shape of the edge of the turntable 1. The limiting strip 2 is in an overall ring shape with an opening. The bolt feeding module is located at the opening of the limiting strip 2, and the positioning groove 101 of the subsequent corresponding module is limited by the limiting strip 2. The end of the limiting strip 2 after the bolt feeding module is in a conical shape, so as to push the bolts fed in the bolt feeding module by the limiting strip 2 when the turntable 1 rotates to make them fit the inner wall of the positioning groove 101, thereby restricting and positioning;

[0039] Refer to Figure 2 ,Figure 3 , Figure 5 and Figure 6 , after the bolt feeding module is the gasket assembly module. The gasket assembly module mainly sleeves the gasket onto the rod part of the bolt. The gasket assembly module includes a stacking cylinder 3. The upper end of the stacking cylinder 3 is docked with the output track of the gasket vibrating disk. The vibrating disk discharges the gaskets one by one in sequence, and then enters the stacking cylinder 3 in turn for stacking. The setting of the stacking cylinder 3 is mainly to prevent the gaskets output by the vibrating disk from being discontinuous and having vacancies. Stacking can effectively avoid this. At least three groups of rotating rods 4 are rotatably connected to the outer wall of the stacking cylinder 3. Three points determine a circle, so at least three groups. And if there are two groups, the gasket may fall from the gap. Three groups are set and preferably evenly spaced circumferentially. When in a non-uniform distribution state, the circumferential angle between the three groups of rotating rods 4 should be greater than 180° to avoid the gap distance between any two adjacent rotating rods 4 being greater than or equal to the diameter of the gasket. The following descriptions are all based on three groups. The axis of the rotating rod 4 is parallel to the axis of the stacking cylinder 3, and as shown by Figure 2 , the push block disk 5 and the bearing disk 6 are fixedly arranged from top to bottom in sequence. A notch 501 is opened at the edge of the push block disk 5, and the bearing disk 6 is located below the position where the notch 501 is located to supplement part of the notch 501. Gears are fixed at the upper ends of the rotating rods 4, and the gears on each rotating rod 4 are uniformly driven through a gear belt. As shown in Figure 5 and Figure 6 , it rotates clockwise from the perspective shown. The thickness of the push block disk 5 is less than or equal to the thickness of a single assembled gasket, so that the push block disk 5 can separate the gaskets and separate out one gasket at a time for assembly;

[0040] Refer to Figure 4 , an annular protruding wall is arranged on the outer wall of the rotating rod 4. An installation groove corresponding to the annular protruding wall is arranged at the center of the lower surface of the push block disk 5. At the same time, an inverted screw hole is opened on the bearing disk 6 to install and fix the bearing disk 6 and the push block disk 5 together;

[0041] Specifically, after the gasket enters the stacking cylinder 3 from the output track of the vibrating disk, due to the limitation of the push block disk 5, the gaskets are stacked in the stacking cylinder 3. When the bolt reaches directly below the stacking cylinder 3, that is, directly below the gasket assembly module, after passing through the bolt feeding module, the gears on the rotating rods 4 are driven by the driving component, and then the rotating rods 4 are driven to rotate. In the initial state as shown by Figure 5 , in the top view state, first the push block disk 5 supports the gasket, and then under the clockwise rotation of the rotating rod 4, as shown by Figure 6As shown, the lowermost gasket disengages from the push block disk 5 and drops onto the carrier disk 6. Due to the thickness limitation of the push block disk 5 and the lower edge limitation of the stacking cylinder 3, the other gaskets remain in the stacking cylinder 3. With the continuous rotation of the rotating rod 4, they are again placed on the push block disk 5. The gasket on the carrier disk 6 drops off after disengaging from the carrier disk 6 with the continuous rotation of the rotating rod 4. Since it is positioned by one endpoint of the tooth opening 501 before dropping, with three-point positioning, the axis of the gasket coincides with the axis of the bolt and the gasket is directly above the bolt. The lower end of the stacking cylinder 3 approaches the end of the bolt, making the gasket as close to the bolt as possible, facilitating assembly;

[0042] The unloading module is located at the end of the turntable 1. It mainly uses a movable robotic arm to clamp, move, and place the assembled bolts.

[0043] The distance between the carrier disk 6 and the tray 9 should not be too large to prevent the gasket from bouncing and flying out under the action of the reaction force when dropping, and to prevent the gasket from tilting and dropping and flying out. Therefore, setting a smaller distance can avoid the above situations.

[0044] Furthermore, a second sensor 14 is provided on the bolt feeding module. The second sensor 14 is used to detect whether there is a bolt in the positioning groove 101 corresponding to the bolt feeding module on the turntable 1. Since the bolts conveyed by the vibrating disk have a void (i.e., are discontinuous), and the turntable 1 rotates at periodic angles, when a void is detected, the actions of the next station are not generated, that is, it is also left empty. When a non-void is detected subsequently, assembly is carried out again. The second sensor 14 can be a distance sensor or a color sensor, as long as it can detect the bolt at the corresponding position.

[0045] The rotating rod 4 is movably arranged along the radial direction of the stacking cylinder 3, that is, the distance between the axis of the rotating rod 4 and the axis of the stacking cylinder 3 can be adjusted, thereby changing the positions of each plate, so as to be applicable to gaskets of different sizes. For those with too large size differences, different stacking cylinders 3 need to be replaced.

[0046] A gasket pressing module and a void detection module are also sequentially arranged between the gasket assembly module and the unloading module. The gasket pressing module mainly consists of a pressing cylinder 7 installed on a movable device such as a cylinder, and the axis of the pressing cylinder 7 is vertical and moves up and down. The pressing cylinder 7 is a hollow tube, the inner diameter of which is larger than the rod diameter of the bolt and smaller than the outer diameter of the gasket. The gasket is pressed onto the nut end of the bolt rod by the downward movement of the pressing cylinder 7. The void detection module is used to detect whether the gasket is pressed in place and also to prevent multi-gasket assembly, that is, to avoid multi-gasket assembly at one time in the gasket assembly module. Once a void (no gasket or multiple gaskets) is detected, it is moved to the defective product area by the subsequent robotic arm. The first sensor 8 and the second sensor 14 can be the same or different, and they only need to detect the height of the gasket to judge.

[0047] See also Figure 2 , Figure 3 and Figure 7 , Figure 8 and Figure 9 On the basis of the previous embodiment, the rotating rod 4 is located below the carrying plate 6 and a tray 9 is fixed thereto. The tray 9 is used to receive the gasket dropped from the carrying plate 6. Figure 7 As shown, the gasket is kept stable on the tray 9, and a push plate 10 is also fixed on the rotating rod 4. The thickness of the push plate 10 is greater than or equal to the thickness of a gasket, and the lower surface of the push plate 10 is at the same height as the upper surface of the tray 9. In the rotation direction of the rotating rod 4, the tray 9 first contacts the gasket, and the tray 9 and the push plate 10 have an overlapping section;

[0048] Furthermore, the tray 9 and the push plate 10 are an integrated structure, and the tray 9 and the push plate 10 are invertedly mounted on the outer wall of the rotating rod 4 through ribs;

[0049] Specifically, after the gasket is detached from the supporting plate 6, the gasket falls onto the tray 9. As the rotating rod 4 rotates, the tray 9 will also drive the gasket to rotate. After rotation, the edge of the gasket contacts the edge of the push plate 10, and the edges of the three push plates 10 lift the gasket. After continuing to rotate, the gasket rotates in the air, but its position does not change. When it rotates to the outer edge end of the push plate 10, the gasket falls, thereby being assembled.

[0050] See also Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 Whether it is through the push plate 10 or the carrier plate 6, both of them make the gasket fall and be installed on the rod part of the bolt. Even if the initial height of the gasket falling is as close to the bolt as possible, there is still a gap, and there is a situation that it is not assembled. In order to avoid this situation, a push plate 2 11 is set at the lower end of the rotating rod 4 along its axial direction. The cross-section of the push plate 2 11 is L-shaped, and the two side walls are slidably connected to the rotating rod 4 through ribs along the axial direction of the rotating rod 4. The rotating rod 4 is a hollow rod. The fixing rod 12 is fixed on the outer wall of the stacking tube 3. The fixing rod 12 extends into the rotating rod 4 and is coaxially arranged therewith. A spiral guide is arranged between the side wall of 12 and the inner wall of the push plate 2 11, that is, when the push plate 2 11 rotates with the rotating rod 4, under the action of the spiral guide, the push plate 2 11 moves downward along the axial direction of the rotating rod 4, and the spiral guide is not in the entire circumferential direction. The initial state of the push plate 2 11 is adjacent to and fits with the push plate 1 10, and the two are at the same height. The thickness of the horizontal part of the push plate 2 11 is the same as that of the push plate 10. A spring 13 is also arranged between the upper end surface of the push plate 2 11 and the inner wall of the rotating rod 4, and the spring 13 is used to reset the push plate 2 11;

[0051] Further, the rotating rod 4 is composed of two plate-shaped bodies in the shape of a plate ring, and is fixedly combined by screws or the like;

[0052] Specifically, after the gasket is clamped by the first pushing plate 10, since the second pushing plate 11 is adjacent to and in contact with the first pushing plate 10, the gasket is transferred to the second pushing plate 11 and clamped by the second pushing plate 11. As the rotating rod 4 rotates, the spiral groove on the inner wall of the second pushing plate 11 contacts and slides with the spiral rib on the surface of the fixed rod 12, causing the height of the second pushing plate 11 to decrease. During the descent, the gasket rotates and its height decreases, but its horizontal position remains unchanged. Therefore, the assembly is completed, rather than directly falling onto the bolt, thus avoiding the problem of assembly failure. After assembly, the rotating rod 4 continues to rotate, the second pushing plate 11 disengages from the spiral rib, and under the action of the spring 13, it resets to perform the next cycle.

[0053] Further, an inner groove 001 is provided on the outer diameter surface of the first pushing plate 10 and / or the second pushing plate 11, that is, as Figure 3 shown, the design of the inner groove 001 ensures that there is no risk of premature dropping during the rotation of the gasket, and it can stably enter the rod portion of the bolt for assembly.

[0054] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0055] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt and washer automatic assembly machine, comprising: A turntable (1) has an edge on which at least a bolt loading module, a gasket assembly module and a discharge module are sequentially arranged along the rotation direction; The bolt feeding module screens and guides the bolts through a vibrating plate and places the bolts upside down on a turntable (1) through a guide rail; The unloading module transports the assembled bolts and gaskets to the designated placement area through a robotic arm; Features: The edge of the rotating disk (1) is evenly spaced and provided with a plurality of positioning grooves (101) with edge openings for inverting bolts, and the spacing between the bolt loading module, the gasket assembly module and the unloading module is an integer multiple of the spacing between two adjacent positioning grooves (101); A limit strip (2), the limit strip (2) is located at the edge of the turntable (1) and follows the shape, cooperates with the positioning groove (101) to position the bolt, and one end of the limit strip (2) is used for bolt guidance; The gasket pressing module comprises a stacking tube (3) located just above the corresponding positioning groove (101), the top of the stacking tube (3) is connected to the vibration plate track for conveying the gasket, at least three groups of rotating rods (4) are arranged along the circumference of the bottom of the outer wall of the stacking tube (3), the sum of the angles between the three groups of rotating rods (4) is greater than 180 degrees, and a push plate (5) and a bearing plate (6) are fixedly connected to the rotating rod (4) in sequence from top to bottom along the axial direction, the push plate (5) is provided with a tooth opening (501), and the bearing plate (6) is located below the tooth opening (501), the thickness of the push plate (5) is less than or equal to the thickness of a single gasket to be assembled, and when the rotating rod (4) rotates, the bottom gasket falls from the tooth opening (501) on the push plate (5) to the bearing plate (6), and then falls from the bearing plate (6) to the bolt rod for assembly; A tray (9) is also fixed on the rotating rod (4), and the tray (9) is located below the carrying plate (6). When the rotating rod (4) rotates, the gasket is separated from the carrying plate (6) and then received by the tray (9). A push plate (10) is also fixed on the rotating rod (4), and the upper surface of the push plate (10) is higher than the upper surface of the tray (9) by at least one gasket thickness. The outer diameter surface of the push plate (10) contacts the outer diameter surface of the gasket and rotates to make the gasket suspended in the air. The outer wall of the rotating rod (4) is connected to a push plate 2 (11) in a sliding manner along its axial direction. In an initial state, the push plate 2 (11) is at the same height as the push plate 1 (10). As the rotating rod (4) rotates, the gasket is transferred from the outer diameter surface of the push plate 1 (10) to the outer diameter surface of the push plate 2 (11). The rotating rod (4) is hollow and a fixing rod (12) extending into the rotating rod (4) is fixed to the outer wall of the stacking tube (3). The fixing rod (12) and the inner wall of the push plate 2 (11) are provided with a non-full-circle spiral guide, so that the push plate 2 (11) gradually moves downward as the rotating rod (4) rotates to insert the gasket into the bolt rod. A spring (13) is provided between the push plate 2 (11) and the rotating rod (4). After the gasket is inserted into the bolt, the push plate 2 (11) is reset.

2. The bolt washer automatic assembly machine according to claim 1, characterized in that: An inner groove (001) is provided on the outer diameter surface of the push plate 1 (10) and / or the push plate 2 (11).

3. The bolt washer automatic assembly machine according to claim 1, characterized in that: The bolt feeding module is provided with a second sensor (14) for detecting the bolts at its corresponding positioning groove (101).

4. The bolt washer automatic assembly machine according to claim 1, characterized in that: The rotating rod (4) is movably arranged along the radial direction of the stacking cylinder (3).

5. The bolt washer automatic assembly machine according to claim 1, characterized in that: The distance between the carrier plate (6) and the tray (9) along the axial direction of the rotating rod (4) is three to ten gasket thicknesses.

6. The bolt washer automatic assembly machine according to claim 1, characterized in that: It also includes a gasket pressing module, which is composed of a pressing cylinder (7) located above the corresponding positioning groove (101) and can move up and down, and presses the gasket against the head support surface of the bolt. The gasket pressing module is located between the gasket assembly module and the unloading module.

7. The bolt washer automatic assembly machine according to claim 6, characterized in that: It also includes a virtual position detection module arranged between the gasket pressing module and the unloading module, which is composed of a sensor (8) arranged above the corresponding positioning groove (101) to detect the height of the gasket after pressing.

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