Switchable press-fitting mechanism of ABS (anti-lock brake system) valve

Abstract

The utility model discloses a switchable press-fitting mechanism of an ABS (anti-lock brake system) valve, which comprises a fixed plate and a displacement switching plate connected with the fixed plate in a sliding manner through a guide rail, and the displacement switching plate is connected with a pre-pressing component and a riveting component; the pre-pressing assembly comprises a first fixed seat, a liftable first movable rod and a pre-pressing head, and a first reset spring is arranged between the first movable rod and the first fixed seat; the riveting assembly comprises a second fixed seat, a liftable second movable rod and a riveting head, and a second reset spring is arranged between the second movable rod and the second fixed seat. The pre-pressing head is used for pushing the one-way valve part into an ABS valve body mounting hole, and the riveting head is used for extruding and deforming the peripheral wall of the upper end of the mounting hole and fixing the one-way valve part. According to the one-way valve, the pre-pressing function and the riveting function are integrated, rapid function switching is achieved through the displacement switching plate, the production efficiency is greatly improved, stable connection between the one-way valve part and the ABS valve body mounting hole is guaranteed, and the problem of looseness after long-term use is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile ABS valve production, specifically to a switchable type press fitting mechanism of ABS valve. BACKGROUND

[0002] ABS valve, i.e. anti-lock braking system valve, is an important component in automobile braking system.

[0003] In the production process of ABS valve, a key step is to press the one-way valve part into the corresponding installation hole of ABS valve body accurately. The traditional press fitting method usually adopts press fitting tool to directly press fit. In this way, the one-way valve part and the installation hole form an interference connection. However, this connection method has the problem of insufficient firmness, and is prone to looseness after long-term use, affecting the performance and reliability of ABS valve.

[0004] In order to solve this problem, the industry tries to use screws, welding, riveting, glue and other ways to fix the one-way valve part. But these methods usually need to move the part to other workstations and use special tools to operate, which is cumbersome and low in efficiency. Especially on large-scale production line, this inefficient fixing method will seriously affect the production efficiency and production cost. TECHNICAL CONTENT

[0005] The utility model aims at the problems existing in the prior art, and provides a switchable type press fitting mechanism of ABS valve, which integrates pre-pressing assembly and riveting assembly, and realizes quick switching by using displacement switching plate, greatly improves production efficiency, ensures firm connection between one-way valve part and installation hole of ABS valve body, and prevents looseness after long-term use.

[0006] To achieve the above object, the utility model adopts the technical scheme of:

[0007] The application discloses a switchable pressing mechanism of an ABS valve, which comprises a fixed plate, a displacement switch plate connected to the fixed plate through a guide rail, a pre-pressing assembly and a riveting pressing assembly connected to the displacement switch plate; the pre-pressing assembly comprises a first fixed seat, a first movable rod and a pre-pressing head, the first fixed seat is fixedly connected to the displacement switch plate, the first movable rod can be lifted and displaced under the guidance of the first fixed seat, a first return spring is connected between the first movable rod and the first fixed seat, and the pre-pressing head is fixedly connected to the lower end of the first movable rod; the riveting pressing assembly comprises a second fixed seat, a second movable rod and a riveting pressing head, the second fixed seat is fixedly connected to the displacement switch plate, the second movable rod can be lifted and displaced under the guidance of the second fixed seat, a second return spring is connected between the second movable rod and the second fixed seat, and the riveting pressing head is fixedly connected to the lower end of the second movable rod; the pre-pressing head is used for pushing a check valve part into a corresponding ABS valve body mounting hole; and the riveting pressing head is used for extruding and deforming the upper end peripheral wall of the ABS valve body mounting hole so as to fix the check valve part in the mounting hole.

[0008] Further, the lower end of the first movable rod is provided with a first mounting groove, the upper part of the pre-pressing head is inserted into the first mounting groove and is fixed through a bolt, the lower part of the pre-pressing head is provided with a coaxial movable sleeve, the movable sleeve can be lifted and displaced under the guidance of the pre-pressing head and is limited in the up and down directions through a limiting structure, when the movable sleeve is in the lower limit position, the movable sleeve covers the lower end of the pre-pressing head, and when the movable sleeve is in the upper limit position, the lower end of the pre-pressing head extends out of the movable sleeve.

[0009] Further, the pre-pressing head is provided with a first blocking ring, the movable sleeve is provided with a second blocking ring, and a third return spring is arranged between the first blocking ring and the second blocking ring.

[0010] Further, the outer side wall of the pre-pressing head is provided with a vertical limiting groove, the movable sleeve is connected with a bolt, and one end of the bolt extends into the limiting groove, so that the up and down displacement of the movable sleeve is limited.

[0011] Further, the middle part of the pre-pressing head is provided with a negative pressure air channel which penetrates the pre-pressing head in the up and down directions, and the first movable rod is provided with an air pipe joint connected with the first mounting groove.

[0012] Further, the lower end of the second movable rod is provided with a second mounting groove, the upper part of the riveting pressing head is inserted into the second mounting groove and is fixed through a bolt, the middle part of the riveting pressing head is provided with a coaxial vertical cavity, a jack is movably arranged in the cavity, and the inner wall step of the cavity limits the lower end of the jack, and when the jack is in the lower limit position, the lower end of the jack extends out of the riveting pressing head.

[0013] Further, the upper end of the cavity is provided with an end cover, and a fourth reset spring is arranged between the end cover and the ejector rod.

[0014] Further, the displacement switching plate is connected with a visual detection device, and the visual detection device is located between the pre-pressing assembly and the riveting assembly.

[0015] Further, the fixed plate is connected with a linear driving device, and a movable end of the linear driving device is connected with the displacement switching plate.

[0016] Further, the fixed plate is provided with a first position detector and a second position detector, and when the displacement switching plate is located at an initial position, the first position detector is used for detecting the pre-pressing assembly, and the second position detector is used for detecting the riveting assembly.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The pre-pressing assembly and the riveting assembly are integrated on the same mechanism, and rapid switching is realized by using the displacement switching plate, so that the cumbersome operation of moving to other stations and using special tools for fixing in the traditional mode is avoided, and the production efficiency is greatly improved.

[0019] 2. The pre-pressing head and the riveting head are driven by the first movable rod and the second movable rod respectively, so that the pressure assembly and fixing of the check valve part are completed, the pressure assembly efficiency is improved, the firm connection between the check valve part and the installation hole of the ABS valve body is ensured, and the loosening problem after long-term use is prevented.

[0020] 3. The movable sleeve is sleeved on the lower part of the pre-pressing head, the movable sleeve can be displaced up and down under the guidance of the pre-pressing head, and is limited up and down by the limiting structure, so that the check valve part is prevented from being damaged due to excessive extrusion, and the reliability of the pressure assembly is improved.

[0021] 4. The riveting head is provided with a coaxial vertical cavity, the ejector rod is movably arranged in the cavity, the riveting surface formed around the ejector rod makes the riveting force more uniformly distributed, the displacement or deformation of the check valve part during the riveting process is avoided, and the reliability of the riveting is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1It is the overall structure schematic view of the pressing mechanism in an embodiment of the application;

[0024] Figure 2 It is the front view sectional view of the pressing mechanism in an embodiment of the application;

[0025] Figure 3 It is the overall structure schematic view of the pressing mechanism in an embodiment of the application Figure 2 It is the local enlarged view of A in the application;

[0026] Figure 4 It is the local enlarged view of A after rotating 90 degrees in the application Figure 2

[0027] It is the local enlarged view of B in the application; Figure 5 Figure 2 Figure: 1, fixed plate;2, displacement switching plate;3, pre-pressing assembly;4, rivet pressing assembly;5, first fixed seat;6, first movable rod;7, pre-pressing head;8, first reset spring;9, second fixed seat;10, second movable rod;11, rivet pressing head;12, second reset spring;13, movable sleeve;14, third reset spring;15, limit groove;16, bolt;17, negative pressure air duct;18, air pipe joint;19, top rod;20, end cover;21, fourth reset spring;22, visual detection device;23, linear drive device;24, first position detector;25, second position detector.

[0028] DETAILED DESCRIPTION The technical scheme of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0031] ​In addition, the terms "horizontal", "vertical", and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0032] In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the production process of ABS valve, a key step is to press the one-way valve part into the corresponding mounting hole of ABS valve body accurately. The traditional pressing method usually adopts pressing tool to press directly, in which the interference fit is formed between the one-way valve part and the mounting hole. However, this connection mode has the problem of insufficient firmness, and is easy to loosen after long-term use, which affects the performance and reliability of ABS valve.

[0034] In order to solve this problem, the industry tries to use screws, welding, riveting, glue and other ways to fix the one-way valve part. However, these methods usually need to move the part to other workstations and use special tools for operation, which is cumbersome and low in efficiency. Especially in large-scale production line, this low-efficiency fixing method will seriously affect the production efficiency and production cost.

[0035] In view of the above technical problems, such as Figures 1 to 5As shown, the embodiment of the present application provides a switchable press fitting mechanism of ABS valve, comprising a fixed plate 1, the fixed plate 1 is connected with a displacement switching plate 2 through a guide rail sliding connection, the displacement switching plate 2 is connected with a pre-pressing assembly 3 and a riveting assembly 4; the pre-pressing assembly 3 comprises a first fixed seat 5, a first movable rod 6 and a pre-pressing head 7, the first fixed seat 5 is connected with the displacement switching plate 2, the first movable rod 6 can be lifted and displaced under the guidance of the first fixed seat 5, a first return spring 8 is connected between the first movable rod 6 and the first fixed seat 5, the pre-pressing head 7 is fixedly connected to the lower end of the first movable rod 6; the riveting assembly 4 comprises a second fixed seat 9, a second movable rod 10 and a riveting head 11, the second fixed seat 9 is connected with the displacement switching plate 2, the second movable rod 10 can be lifted and displaced under the guidance of the second fixed seat 9, a second return spring 12 is connected between the second movable rod 10 and the second fixed seat 9, the riveting head 11 is fixedly connected to the lower end of the second movable rod 10; the pre-pressing head 7 is used for pushing the check valve part into the corresponding ABS valve body mounting hole; the riveting head 11 is used for extruding and deforming the upper peripheral wall of the ABS valve body mounting hole to fix the check valve part in the mounting hole.

[0036] The press head switching mechanism of ABS valve realizes the switching of the pre-pressing assembly 3 and the riveting assembly 4 by sliding the displacement switching plate 2 along the guide rail relative to the fixed plate 1. In the pre-pressing process, the check valve part is mounted on the pre-pressing head 7, and the pre-pressing head 7 is aligned with the ABS valve body mounting hole by moving the displacement switching plate 2. Then, the press fitting driving device drives the first movable rod 6 to descend under the guidance of the first fixed seat 5, and the check valve part is pressed into the mounting hole, and then returns under the action of the first return spring 8. Then riveting is carried out, the riveting head 11 is aligned with the mounting hole by moving the displacement switching plate 2 again, the press fitting driving device drives the second movable rod 10 to descend under the guidance of the second fixed seat 9, the riveting head 11 contacts and extrudes the upper peripheral wall of the mounting hole to deform it, and the check valve part is limited and fixed, and finally returns under the action of the second return spring 12.

[0037] By integrating the pre-pressing assembly 3 and the riveting assembly 4 on the same mechanism and using the displacement switching plate 2 to realize quick switching, the cumbersome operation of moving to other stations and using special tools for fixing in the traditional way is avoided. The pre-pressing head 7 and the riveting head 11 are driven by the first movable rod 6 and the second movable rod 10 respectively to complete the press fitting and fixing of the check valve part, which improves the press fitting efficiency and ensures the firm connection between the check valve part and the ABS valve body mounting hole, effectively preventing the loosening problem after long-term use.

[0038] In some embodiments, the lower end of the first movable rod 6 is provided with a first mounting slot, the upper part of the pre-pressing head 7 is inserted into the first mounting slot and fixed by bolts; the lower part of the pre-pressing head 7 is coaxially sleeved with a movable sleeve 13, the movable sleeve 13 can be displaced up and down under the guidance of the pre-pressing head 7 and is up and down limited by a limiting structure; when the movable sleeve 13 is in the lower limit position, the movable sleeve 13 covers the lower end of the pre-pressing head 7; when the movable sleeve 13 is in the upper limit position, the lower end of the pre-pressing head 7 protrudes out of the movable sleeve 13.

[0039] The lower end of the first movable rod 6 is provided with a first mounting slot, the upper part of the pre-pressing head 7 is inserted into the first mounting slot and fixed by bolts; the lower part of the pre-pressing head 7 is coaxially sleeved with a movable sleeve 13, the movable sleeve 13 can be displaced up and down under the guidance of the pre-pressing head 7 and is up and down limited by a limiting structure; when the movable sleeve 13 is in the lower limit position, the movable sleeve 13 covers the lower end of the pre-pressing head 7; when the movable sleeve 13 is in the upper limit position, the lower end of the pre-pressing head 7 protrudes out of the movable sleeve 13.

[0040] In some embodiments, the pre-pressing head 7 is provided with a first stop ring, the movable sleeve is provided with a second stop ring, and the first stop ring and the second stop ring are provided with a third reset spring 14.

[0041] In the pre-pressing process, when the pre-pressing head 7 pushes the one-way valve part to move into the mounting hole, the movable sleeve 13 is blocked by the upper end of the mounting hole and retracts until it reaches the upper limit position. In this way, the further downward pressure of the movable sleeve 13 on the pre-pressing head 7 is limited, avoiding the damage of the one-way valve part caused by excessive extrusion. This structure design improves the reliability of the press fitting,

[0042] In some embodiments, the outer side wall of the pre-pressing head 7 is provided with a vertical limiting slot 15, and the movable sleeve 13 is connected with a bolt 16, one end of the bolt 16 extends into the limiting slot 15, thereby limiting the up and down displacement of the movable sleeve 13.

[0043] The outer side wall of the pre-pressing head 7 is provided with a vertical limiting slot 15, and the movable sleeve 13 is connected with a bolt 16. One end of the bolt 16 extends into the limiting slot 15 and cooperates with the limiting slot 15. In the pre-pressing process, when the pre-pressing head 7 pushes the one-way valve part to move, the movable sleeve 13 is blocked and moves up. At this time, the bolt 16 slides in the limiting slot 15, and the limiting slot 15 limits the up and down displacement of the movable sleeve 13.

[0044] In some embodiments, the middle part of the pre-pressing head 7 is provided with a negative pressure air duct 17 penetrating from top to bottom, and the first movable rod 6 is provided with an air pipe joint 18 connected with the first mounting groove.

[0045] The external negative pressure source provides negative pressure to the pre-pressing head 7 through the air pipe joint 18 and the negative pressure air duct 17, so that the pre-pressing head 7 can adsorb the part by negative pressure, position it, and prevent it from falling during displacement.

[0046] In some embodiments, the lower end of the second movable rod 10 is provided with a second mounting groove, the upper part of the riveting head 11 is inserted into the second mounting groove and fixed by bolts; the middle part of the riveting head 11 is provided with a coaxial vertical cavity, and a top rod 19 is movably arranged in the cavity; the inner wall step of the cavity limits the lower end of the top rod 19, and when the top rod 19 is in the lower limit position, the lower end of the top rod 19 extends out of the riveting head 11.

[0047] During the riveting process, the lower end of the top rod 19 extends out of the bottom of the riveting head 11 and first enters the mounting hole to abut against the one-way valve part. Subsequently, when the riveting head 11 contacts and presses the outer wall of the upper end of the mounting hole, due to the central position of the top rod 19, the outer wall of the upper end of the mounting hole forms a uniform riveting surface around the top rod 19.

[0048] By designing the cooperation structure of the movable top rod 19 and the riveting head 11, accurate riveting and positioning of the one-way valve part are achieved. The riveting surface formed around the top rod 19 makes the riveting force more uniformly distributed, avoiding the displacement or deformation of the one-way valve part during the riveting process, and improving the reliability of riveting.

[0049] In some embodiments, the upper end of the cavity is provided with an end cover 20, and a fourth return spring 21 is arranged between the end cover 20 and the top rod 19.

[0050] When the top rod 19 abuts against the one-way valve part, the fourth return spring 21 is compressed and stores elastic potential energy. After the riveting is completed, the fourth return spring 21 releases the stored elastic potential energy and pushes the top rod 19 to extend out again, restoring to the initial position. That is, by setting the end cover 20 and the fourth return spring 21, the automatic reset function of the top rod 19 is achieved.

[0051] In some embodiments, the displacement switching plate 2 is connected with a visual detection device 22, and the visual detection device 22 is located between the pre-pressing assembly and the riveting assembly.

[0052] The optional visual detection device 22 is an industrial camera.

[0053] Before the pre-press operation, the industrial camera is started to capture high-precision and real-time images inside the mounting hole. Through image processing algorithms, the shape, size and internal situation of the mounting hole are analyzed to determine whether it meets the predetermined press-fitting conditions, thereby avoiding rework and part damage caused by the mounting hole not meeting the press-fitting conditions.

[0054] In some embodiments, the fixed plate 1 is connected with a linear driving device 23, and the movable end of the linear driving device 23 is connected with the displacement switching plate 2.

[0055] Optionally, the linear driving device 23 can be an electric cylinder, a pneumatic cylinder and an oil cylinder.

[0056] The linear driving device 23 can drive the movable end to move linearly according to the control signal, thereby driving the displacement switching plate 2 to move in a predetermined direction, so as to realize automatic switching of the ABS valve pressure head.

[0057] In some embodiments, the fixed plate 1 is provided with a first position detector 24 and a second position detector 25, and when the displacement switching plate 2 is located at the initial position, the first position detector 24 is used to detect the pre-press assembly, and the second position detector 25 is used to detect the riveting assembly.

[0058] By arranging the first position detector 24 and the second position detector 25, when the displacement switching plate 2 moves to the initial position, the first position detector 24 can accurately detect the position of the pre-press assembly, and the second position detector 25 can simultaneously detect the position of the riveting assembly, thereby providing position feedback information and providing accurate positioning basis for the control system.

[0059] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A switchable press-fitting mechanism for an ABS valve, characterized in that, It includes a fixed plate (1), which is slidably connected to a displacement switching plate (2) via a guide rail. The displacement switching plate (2) is connected to a pre-pressing component (3) and a riveting component (4). The pre-compression assembly (3) includes a first fixed seat (5), a first movable rod (6), and a pre-compression head (7). The first fixed seat (5) is connected and fixed to the displacement switching plate (2). The first movable rod (6) can be raised and lowered under the guidance of the first fixed seat (5). A first return spring (8) is connected between the first movable rod (6) and the first fixed seat (5). The pre-compression head (7) is fixedly connected to the lower end of the first movable rod (6). The riveting assembly (4) includes a second fixed seat (9), a second movable rod (10), and a riveting head (11). The second fixed seat (9) is connected and fixed to the displacement switching plate (2). The second movable rod (10) can be raised and lowered under the guidance of the second fixed seat (9). A second return spring (12) is connected between the second movable rod (10) and the second fixed seat (9). The riveting head (11) is fixedly connected to the lower end of the second movable rod (10). The pre-press head (7) is used to push the one-way valve parts into the corresponding ABS valve body mounting hole; the riveting head (11) is used to squeeze and deform the upper peripheral wall of the ABS valve body mounting hole to fix the one-way valve parts in the mounting hole.

2. The switchable press-fitting mechanism for an ABS valve according to claim 1, characterized in that, The lower end of the first movable rod (6) is provided with a first mounting groove, and the upper part of the preload head (7) is inserted into the first mounting groove and fixed by bolts; The lower outer side of the pre-compression head (7) is fitted with a coaxial movable sleeve (13). The movable sleeve (13) can move up and down under the guidance of the pre-compression head (7) and is limited up and down by a limiting structure. When the movable sleeve (13) is in the lower limit position, the movable sleeve (13) covers the lower end of the pre-pressure head (7); when the movable sleeve (13) is in the upper limit position, the lower end of the pre-pressure head (7) extends out of the movable sleeve (13).

3. The switchable press-fitting mechanism for an ABS valve according to claim 2, characterized in that, The preload head (7) is provided with a first retaining ring, the movable sleeve is provided with a second retaining ring, and a third return spring (14) is provided between the first retaining ring and the second retaining ring.

4. The switchable press-fitting mechanism for an ABS valve according to claim 2, characterized in that, The outer wall of the preload head (7) is provided with a vertical limiting groove (15), and the movable sleeve (13) is connected with a pin (16). One end of the pin (16) extends into the limiting groove (15), thereby limiting the vertical displacement of the movable sleeve (13).

5. The switchable press-fitting mechanism for an ABS valve according to claim 2, characterized in that, The pre-pressure head (7) is provided with a negative pressure air passage (17) that runs vertically through the middle, and the first movable rod (6) is provided with an air pipe connector (18) that connects to the first mounting groove.

6. The switchable press-fitting mechanism for an ABS valve according to claim 1, characterized in that, The lower end of the second movable rod (10) is provided with a second mounting groove, and the upper part of the riveting head (11) is inserted into the second mounting groove and fixed by bolts; The riveting head (11) has a coaxial vertical cavity in the middle, and a push rod (19) is movably installed in the cavity; the inner wall step of the cavity limits the end of the push rod (19) to a lower position. When the push rod (19) is at the lower limit position, the lower end of the push rod (19) extends out of the riveting head (11).

7. The switchable press-fitting mechanism for an ABS valve according to claim 6, characterized in that, The cavity is provided with an end cap (20) at its upper end, and a fourth return spring (21) is provided between the end cap (20) and the top rod (19).

8. The switchable press-fitting mechanism for an ABS valve according to claim 1, characterized in that, The displacement switching plate (2) is connected to a visual inspection device (22), which is located between the pre-pressing component and the riveting component.

9. The switchable press-fitting mechanism for an ABS valve according to claim 1, characterized in that, The fixed plate (1) is connected to a linear drive device (23), and the movable end of the linear drive device (23) is connected to the displacement switching plate (2).

10. The switchable press-fitting mechanism for an ABS valve according to claim 1, characterized in that, The fixing plate (1) is provided with a first position detector (24) and a second position detector (25). When the displacement switching plate (2) is in the initial position, the first position detector (24) is used to detect the pre-pressing component, and the second position detector (25) is used to detect the riveting component.

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