Riveting press for valve element of injection valve

Abstract

The invention discloses a riveting press for a valve element of an injection valve. The riveting press comprises a rack; the contact type displacement sensor comprises a mounting seat and a sensor head, and a contact pin is arranged at the lower end of the sensor head; the supporting table comprises a fixed seat and a movable seat, and the movable seat and the fixed seat are matched to clamp and support the valve element shell; the riveting assembly comprises a pressing table and a riveting sleeve, a bending guide part which is gradually shrunk from bottom to top is arranged in an inner cavity of the lower end of the riveting sleeve, the contact pin is vertically arranged in the riveting sleeve in a penetrating mode, and the bending guide part can inwards extrude the upper edge of the cylindrical shell; the upper end face of the valve element rubber mat extends upwards from the upper edge of the cylindrical shell, and the contact needle gradually ascends until the sensor head reaches a preset height. According to the riveting machine, by limiting the final rising height of the upper end face of the valve element rubber mat, the distance between the lower end face of the riveted valve element shell and the upper end face of the valve element rubber mat is constant, and it is guaranteed that the overall length of a valve element is consistent.

Description

Technical Field

[0001] The invention relates to the technical field of dispensing type injection valve assembly, in particular to injection valve valve core riveting equipment. Background Art

[0002] Jet valves are widely used in dispensing operations, among which the valve core is an important component of the jet valve and is very small. Before the valve core is produced and assembled, the valve core housing and the valve core rubber pad need to be riveted and connected. During the riveting operation, the valve core rubber pad is squeezed and deformed in the inner cavity of the cylindrical shell of the valve core housing, and the upper end surface of the valve core rubber pad protrudes from the cylindrical shell and is raised a certain height. The overall length of the valve core (referring to the distance between the lower end surface of the valve core housing and the upper end surface of the valve core rubber pad) determines the opening and closing performance of the jet valve channel. Therefore, the riveting accuracy requirements for the valve core are relatively high, and the overall length of the valve core that is finally riveted needs to be consistent.

[0003] At present, manually assisted semi-automatic riveting equipment is mainly used to rivet the valve core of the injection valve, but the accuracy is poor. Even if fully automated riveting equipment is used for riveting operations, although the riveting action and riveting degree applied to the valve core housing and the valve core rubber pad are almost the same each time, due to the manufacturing accuracy errors of the valve core housing and the valve core rubber pad themselves, the overall length of the riveted valve core is still uneven, the error cannot be compensated, and it is difficult to ensure consistency. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a jet valve core riveting machine, which can ensure that the overall length of the valve core after riveting is consistent.

[0005] The injection valve core riveting machine according to the embodiment of the present invention is used to rivet and connect the valve core housing and the valve core rubber pad, the valve core rubber pad is cylindrical, the upper end of the valve core housing is protruding with a cylindrical housing with an opening facing upward, the inner cavity of the cylindrical housing is configured to accommodate and place the valve core rubber pad, including: a frame; a contact displacement sensor, including a mounting seat fixedly arranged on the frame and a sensor head that can move up and down relative to the mounting seat, the lower end of the sensor head is provided with a contact pin; a supporting platform, including a fixed seat arranged on the frame and a movable seat that can move horizontally relative to the fixed seat, the movable seat and the fixed seat cooperate to clamp and support the valve core housing; a riveting assembly, including a pressing platform and a riveting sleeve arranged on the pressing platform, the pressing platform can move up and down relative to the frame, the lower end inner cavity of the riveting sleeve is provided with a bending guide portion that gradually shrinks from bottom to top, and the contact pin is passed through the riveting sleeve up and down. In the sleeve, the upper end of the riveting sleeve can support the sensor head, and when the upper end of the riveting sleeve supports the sensor head, the lower end of the contact pin extends downwardly out of the bending guide part, and when the lower end of the contact pin is abutted against the upper end surface of the valve core rubber pad to stop, the contact pin can drive the sensor head to move upward relative to the riveting sleeve; when the bending guide part gradually contacts the upper edge of the cylindrical shell downward, the contact pin abuts against the upper end surface of the valve core rubber pad, and the bending guide part can squeeze the upper edge of the cylindrical shell inward, and the side wall of the cylindrical shell is tilted inwardly and deformed and the volume of the inner cavity of the cylindrical shell is reduced, so that the valve core rubber pad is squeezed and deformed and the upper end surface of the valve core rubber pad extends upward from the upper edge of the cylindrical shell, and the contact pin gradually rises until the sensor head reaches a preset height, and the upper edge of the cylindrical shell is riveted against the side wall of the valve core rubber pad.

[0006] At least the following beneficial effects are provided: the riveting machine clamps and supports the valve core housing through the supporting platform so that the height of the lower end surface of the valve core housing is fixed and maintained consistently, the bending guide portion at the lower end of the riveting sleeve can squeeze the upper edge of the cylindrical housing inwardly, the side wall of the cylindrical housing tilts inwardly and deforms and reduces the volume of the inner cavity of the cylindrical housing, so that the valve core rubber pad is squeezed and deformed and the upper end surface of the valve core rubber pad extends upward from the upper edge of the cylindrical housing. At the same time, the contact needle on the contact displacement sensor is abutted against the stopper by the upper end surface of the valve core rubber pad and can rise synchronously with it, and by limiting the height to which the upper end surface of the valve core rubber pad finally rises, the distance between the lower end surface of the riveted valve core housing and the upper end surface of the valve core rubber pad is kept constant. Even if there is a certain manufacturing precision error between the valve core housing and the valve core rubber pad itself, length compensation is achieved by controlling the riveting degree of the two, thereby ensuring the consistency of the overall length of the valve core.

[0007] According to some embodiments of the present invention, the frame is provided with a first cylinder, a downward pressing drive device and a vertical guide rod extending in the up and down directions, the press platform is slidably connected to the vertical guide rod by a guide sleeve, the piston rod of the first cylinder is connected to the press platform, the downward pressing drive device can press downward on the press platform and drive the press platform to move downward along the vertical guide rod to a position where the bending guide portion is close to the upper edge of the cylindrical shell, the piston rod of the first cylinder is forced to follow the press platform to move downward synchronously when the first cylinder is ventilated, the first cylinder cuts off the air so that the piston rod of the first cylinder and the press platform move downward under the action of gravity to a position where the bending guide portion abuts the upper edge of the cylindrical shell, the downward pressing drive device continues to press downward on the press platform and drive the press platform to move downward so that the bending guide portion squeezes the upper edge of the cylindrical shell inward until the sensor head reaches a preset height.

[0008] According to some embodiments of the present invention, after the valve core housing and the valve core rubber pad are riveted together, the downward pressing drive device moves upward away from the pressing platform, and the piston rod of the first cylinder drives the pressing platform upward away from the upper edge of the cylindrical housing when the first cylinder is ventilated and started.

[0009] According to some embodiments of the present invention, the downward pressure driving device includes a servo motor, a screw and nut mechanism and a lower pressure plate, the lower pressure plate is located above the press platform, the servo motor is installed on the frame and is connected to the lower pressure plate through the screw and nut mechanism, and the lower pressure plate can press downward on the press platform and drive the press platform to move downward along the vertical guide rod.

[0010] According to some embodiments of the present invention, a controller is further included, and a pressure sensor is arranged at the upper end of the press platform. The pressure sensor can obtain the pressure value applied by the lower press plate to the press platform. The controller is communicatively connected with the pressure sensor and the servo motor at the same time. When the pressure value obtained by the pressure sensor reaches a preset warning threshold, the controller sends a fault shutdown signal instruction to the servo motor.

[0011] According to some embodiments of the present invention, the lower pressing plate is provided with an escape hole which passes through from top to bottom, and the escape hole is used for allowing the sensor head to pass through.

[0012] According to some embodiments of the present invention, a protective cover is fixedly mounted on the mounting seat, the sensor head is inserted into the protective cover and can move up and down relative to the protective cover, and the protective cover passes through the avoidance hole to block the sensor head and the lower pressure plate.

[0013] According to some embodiments of the present invention, the fixed seat includes a base plate and a limit block installed on the base plate, the base plate can support the valve core housing, the limit block is provided with a first positioning groove, and the movable seat is provided with a second positioning groove toward the first positioning groove, and the first positioning groove and the second positioning groove can enclose and limit the horizontal position of the valve core housing.

[0014] According to some embodiments of the present invention, the first positioning groove and the second positioning groove are both semi-cylindrical.

[0015] According to some embodiments of the present invention, a horizontal guide rail and a second cylinder are provided on the frame, the movable seat is slidably connected to the horizontal guide rail, the piston rod of the second cylinder is connected to the movable seat, and the second cylinder can drive the movable seat to slide on the horizontal guide rail so that the second positioning groove is close to or away from the first positioning groove.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic structural diagram of a valve core before riveting according to an embodiment of the present invention; Figure 2 for Figure 1 A partial cross-sectional view of Figure 3 A partial cross-sectional view of the valve core after riveting according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of an embodiment of the present invention before riveting; Figure 5 It is a schematic diagram of the structure of the embodiment of the present invention during riveting; Figure 6 It is a structural schematic diagram of a support platform in an embodiment of the present invention; Figure 7 It is a partial structural schematic diagram of an embodiment of the present invention; Figure 8 for Figure 7 A cross-sectional view of Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0018] Figure numbers: valve core 1, valve core housing 11, cylindrical housing 111, valve core rubber pad 12, frame 2, vertical guide rod 21, horizontal guide rail 22, contact displacement sensor 3, mounting seat 31, sensor head 32, contact pin 33, protective cover 34, support platform 4, fixed seat 41, base plate 411, limit block 412, first positioning groove 413, movable seat 42, second positioning groove 421, riveting assembly 5, pressing platform 51, riveting sleeve 52, bending guide part 521, guide sleeve 53, first cylinder 6, downward pressing drive device 7, servo motor 71, screw nut mechanism 72, downward pressing plate 73, avoidance hole 731, pressure sensor 8, second cylinder 9. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] In the description of the present invention, it is necessary to understand that descriptions involving orientations, such as up, down, inside, outside, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0022] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0023] Reference Figures 4 to 6 The present invention discloses a jet valve core riveting machine, which includes a frame 2, a contact displacement sensor 3, a support platform 4 and a riveting assembly 5.

[0024] This riveting machine is used to rivet the valve core housing 11 and the valve core rubber pad 12 together. Before riveting, refer to Figure 1 and Figure 2 The valve core rubber pad 12 is cylindrical, and a cylindrical shell 111 with an opening facing upward is protruded from the upper end of the valve core housing 11. The inner cavity of the cylindrical shell 111 is configured to accommodate the valve core rubber pad 12.

[0025] Among them, refer to Figure 4 , Figure 7 and Figure 8 The contact displacement sensor 3 includes a mounting base 31 fixedly arranged on the frame 2 and a sensor head 32 capable of moving up and down relative to the mounting base 31. A contact pin 33 is arranged at the lower end of the sensor head 32. It can be understood that when the lower end of the contact pin 33 is abutted against a stop by a measured object, if the measured object moves upward, the contact pin 33 will drive the sensor head 32 to move upward relative to the mounting base 31.

[0026] Reference Figure 4 and Figure 6 The support platform 4 includes a fixed seat 41 arranged on the frame 2 and a movable seat 42 that moves horizontally relative to the fixed seat 41. The movable seat 42 and the fixed seat 41 cooperate to clamp and support the valve core housing 11, wherein the fixed seat 41 is fixed on the frame 2 and remains motionless. Therefore, the lower end surface of the valve core housing 11 can be used as a reference height.

[0027] Reference Figure 4 , Figure 5 as well as Figures 7 to 9 The riveting assembly 5 includes a pressing platform 51 and a riveting sleeve 52 arranged on the pressing platform 51. The pressing platform 51 can move up and down relative to the frame 2. The lower end inner cavity of the riveting sleeve 52 is provided with a bending guide portion 521 that gradually shrinks from bottom to top. The contact pin 33 is inserted into the riveting sleeve 52 up and down, and the upper end of the riveting sleeve 52 can support the sensor head 32.

[0028] Reference Figure 8 When the upper end of the riveting sleeve 52 supports the sensor head 32, the lower end of the contact needle 33 extends downward from the bending guide portion 521. When the lower end of the contact needle 33 is abutted against the upper end surface of the valve core rubber pad 12, the contact needle 33 can drive the sensor head 32 to move upward relative to the riveting sleeve 52.

[0029] Reference Figures 1 to 9 When the bending guide part 521 gradually contacts the upper edge of the cylindrical shell 111 downward, the contact needle 33 abuts against the upper end surface of the valve core rubber pad 12, and the bending guide part 521 can squeeze the upper edge of the cylindrical shell 111 inward, and the side wall of the cylindrical shell 111 tilts inward and deforms and reduces the volume of the inner cavity of the cylindrical shell 111, so that the valve core rubber pad 12 is squeezed and deformed and the upper end surface of the valve core rubber pad 12 extends upward from the upper edge of the cylindrical shell 111, and the contact needle 33 gradually rises until the sensor head 32 reaches a preset height, and the upper edge of the cylindrical shell 111 is riveted to the side wall of the valve core rubber pad 12.

[0030] The present riveting machine clamps and supports the valve core housing 11 through the supporting platform 4, so that the height of the lower end surface of the valve core housing 11 is fixed and maintained consistent, and the bending guide portion 521 at the lower end of the riveting sleeve 52 can squeeze the upper edge of the cylindrical housing 111 inwardly, and the side wall of the cylindrical housing 111 tilts inwardly and deforms and reduces the volume of the inner cavity of the cylindrical housing 111, so that the valve core rubber pad 12 is squeezed and deformed and the upper end surface of the valve core rubber pad 12 extends upward from the upper edge of the cylindrical housing 111. At the same time, the contact needle 33 on the contact displacement sensor 3 is abutted against the stopper by the upper end surface of the valve core rubber pad 12 and can rise synchronously with it. By limiting the height to which the upper end surface of the valve core rubber pad 12 finally rises, the distance between the lower end surface of the valve core housing 11 and the upper end surface of the valve core rubber pad 12 after riveting is completed is kept constant.

[0031] Even if there are certain manufacturing precision errors between the valve core housing 11 and the valve core rubber pad 12 , length compensation can be achieved by controlling the riveting degree of the two, thereby ensuring that the overall length of the valve core 1 is consistent.

[0032] In some embodiments of the present invention, reference Figure 4 and Figure 5 The frame 2 is provided with a first cylinder 6, a downward driving device 7 and a vertical guide rod 21 extending in the up-down direction. The press table 51 is slidably connected to the vertical guide rod 21 through a guide sleeve 53, and the piston rod of the first cylinder 6 is connected to the press table 51.

[0033] In the first stage of the downward pressing process, the downward pressing driving device 7 first presses downward on the pressing platform 51 and drives the pressing platform 51 to move downward along the vertical guide rod 21 to the position where the bending guide 521 is close to the upper edge of the cylindrical shell 111. The piston rod of the first cylinder 6 is forced to move downward synchronously with the pressing platform 51 when the first cylinder 6 is ventilated. Then, the first cylinder 6 cuts off the air to make the piston rod of the first cylinder 6 and the pressing platform 51 move downward under the action of gravity to the position where the bending guide 521 abuts against the upper edge of the cylindrical shell 111. The natural falling of the riveting sleeve 52 can facilitate the alignment of the bending guide 521 with the upper edge of the cylindrical shell 111, reduce the instantaneous collision impulse of the riveting sleeve 52 on the cylindrical shell 111, and prevent the riveting sleeve 52 and the cylindrical shell 111 from being damaged.

[0034] During the second stage of pressing, the pressing drive device 7 continues to press downward on the pressing platform 51 and drives the pressing platform 51 to move downward so that the bending guide 521 presses the upper edge of the cylindrical shell 111 inward. The pressing drive device 7 can press the pressing platform 51 downward step by step, or it can press the pressing platform 51 downward in one step until the sensor head 32 reaches a preset height.

[0035] In some embodiments of the present invention, reference Figure 4 and Figure 5When the valve core housing 11 and the valve core rubber pad 12 are riveted and connected, the pressing drive device 7 is pressed upward away from the pressing platform 51, and the piston rod of the first cylinder 6 drives the pressing platform 51 upward away from the upper edge of the cylindrical housing 111 when the first cylinder 6 is ventilated and started.

[0036] Reference Figure 4 and Figure 5 In some embodiments, the downward pressure driving device 7 includes a servo motor 71, a screw nut mechanism 72 and a lower pressure plate 73. The lower pressure plate 73 is located above the press platform 51. The servo motor 71 is installed on the frame 2 and is connected to the lower pressure plate 73 through the screw nut mechanism 72. The servo motor 71 can accurately control the up and down movement of the lower pressure plate 73, and the lower pressure plate 73 can press downward on the press platform 51 and drive the press platform 51 to move downward along the vertical guide rod 21.

[0037] In addition, this riveting press can also be equipped with a controller, refer to Figure 4 and Figure 5 A pressure sensor 8 is provided at the upper end of the pressing platform 51. The pressure sensor 8 can obtain the pressure value applied by the lower pressing plate 73 to the pressing platform 51. The controller is simultaneously connected to the pressure sensor 8 and the servo motor 71 for communication. When the pressure value obtained by the pressure sensor 8 reaches a preset warning threshold, the controller sends a fault shutdown signal command to the servo motor 71, and the lower pressing plate 73 no longer presses down to prevent excessive riveting of the valve core 1, or to achieve protection against other overload conditions.

[0038] In some embodiments of the present invention, the lower pressing plate 73 is provided with an escape hole 731 which passes through from top to bottom, and the escape hole 731 is used for the sensor head 32 to pass through to prevent interference. The sensor head 32 can be a high-precision contact digital sensor of the KEYENCE GT2 series.

[0039] In order to further protect the sensor head 32, a protective cover 34 can also be fixedly installed on the mounting base 31. The sensor head 32 is inserted into the protective cover 34 and can move up and down relative to the protective cover 34. The protective cover 34 passes through the avoidance hole 731 to block the sensor head 32 and the lower pressure plate 73 to prevent the sensor head 32 from rubbing and colliding with the lower pressure plate 73.

[0040] Reference Figure 6 In some embodiments, the fixed seat 41 includes a base plate 411 and a limit block 412 installed on the base plate 411. The base plate 411 can support the valve core housing 11. The limit block 412 is provided with a first positioning groove 413. The movable seat 42 is provided with a second positioning groove 421 facing the first positioning groove 413. The first positioning groove 413 and the second positioning groove 421 can enclose and limit the horizontal position of the valve core housing 11 to prevent the valve core housing 11 from moving horizontally, thereby realizing multi-directional fixation of the valve core housing 11.

[0041] The first positioning groove 413 and the second positioning groove 421 may be semi-cylindrical in shape, matching the outer contour of the valve core housing 11 .

[0042] In some embodiments, reference Figure 6 A horizontal guide rail 22 and a second cylinder 9 are provided on the frame 2, a movable seat 42 is slidably connected to the horizontal guide rail 22, a piston rod of the second cylinder 9 is connected to the movable seat 42, and the second cylinder 9 can drive the movable seat 42 to slide on the horizontal guide rail 22 so that the second positioning groove 421 is close to or away from the first positioning groove 413, thereby realizing the function of fixing the valve core housing 11 during loading and loosening during unloading.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] Of course, the present invention is not limited to the above-mentioned embodiments, and those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A jet valve core riveting machine, used for riveting and connecting a valve core housing and a valve core rubber pad, wherein the valve core rubber pad is cylindrical, and a cylindrical housing with an upward opening protrudes from the upper end of the valve core housing, and the inner cavity of the cylindrical housing is configured to accommodate and place the valve core rubber pad, characterized in that: include: frame; A contact displacement sensor, comprising a mounting seat fixedly arranged on the frame and a sensor head capable of moving up and down relative to the mounting seat, wherein a contact pin is arranged at the lower end of the sensor head; A support platform, comprising a fixed seat arranged on the frame and a movable seat horizontally movable relative to the fixed seat, wherein the movable seat and the fixed seat cooperate to clamp and support the valve core housing; A riveting assembly comprises a press platform and a riveting sleeve arranged on the press platform, the press platform can move up and down relative to the frame, the inner cavity at the lower end of the riveting sleeve is provided with a bending guide portion which gradually shrinks from bottom to top, the contact pin is passed through the riveting sleeve up and down, the upper end of the riveting sleeve can support the sensor head, when the upper end of the riveting sleeve supports the sensor head, the lower end of the contact pin extends downward out of the bending guide portion, when the lower end of the contact pin is abutted and stopped by the upper end surface of the valve core rubber pad, the contact pin can drive the sensor head to move upward relative to the riveting sleeve; When the bending guide gradually contacts the upper edge of the cylindrical shell downward, the contact needle abuts against the upper end surface of the valve core rubber pad, and the bending guide can squeeze the upper edge of the cylindrical shell inward, and the side wall of the cylindrical shell tilts inward and deforms and reduces the volume of the inner cavity of the cylindrical shell, so that the valve core rubber pad is squeezed and deformed and the upper end surface of the valve core rubber pad extends upward from the upper edge of the cylindrical shell, and the contact needle gradually rises until the sensor head reaches a preset height, and the upper edge of the cylindrical shell is riveted to the side wall of the valve core rubber pad.

2. The injection valve core riveting machine according to claim 1, characterized in that: The frame is provided with a first cylinder, a downward pressing drive device and a vertical guide rod extending in the up and down directions, the press platform is slidably connected to the vertical guide rod by a guide sleeve, the piston rod of the first cylinder is connected to the press platform, the downward pressing drive device can press downward on the press platform and drive the press platform to move downward along the vertical guide rod to the position where the bending guide part is close to the upper edge of the cylindrical shell, the piston rod of the first cylinder is forced to follow the press platform to move downward synchronously when the first cylinder is ventilated, the first cylinder cuts off the air so that the piston rod of the first cylinder and the press platform move downward under the action of gravity to the position where the bending guide part abuts the upper edge of the cylindrical shell, the downward pressing drive device continues to press downward on the press platform and drives the press platform to move downward so that the bending guide part squeezes the upper edge of the cylindrical shell inward until the sensor head reaches a preset height.

3. The injection valve core riveting machine according to claim 2, characterized in that: When the valve core housing and the valve core rubber pad are riveted together, the pressing drive device moves upward away from the pressing platform, and the piston rod of the first cylinder drives the pressing platform upward away from the upper edge of the cylindrical housing when the first cylinder is ventilated and started.

4. The injection valve core riveting machine according to claim 3, characterized in that: The downward pressing drive device includes a servo motor, a screw and nut mechanism and a lower pressing plate. The lower pressing plate is located above the pressing platform. The servo motor is installed on the frame and is connected to the lower pressing plate through the screw and nut mechanism. The lower pressing plate can press downward on the pressing platform and drive the pressing platform to move downward along the vertical guide rod.

5. The injection valve core riveting machine according to claim 4, characterized in that: It also includes a controller, and a pressure sensor is arranged on the upper end of the press platform. The pressure sensor can obtain the pressure value applied by the lower press plate to the press platform. The controller is simultaneously connected to the pressure sensor and the servo motor for communication. When the pressure value obtained by the pressure sensor reaches a preset warning threshold, the controller sends a fault shutdown signal command to the servo motor.

6. The injection valve core riveting machine according to claim 4, characterized in that: The lower pressing plate is provided with an escape hole which passes through from top to bottom, and the escape hole is used for the sensor head to pass through.

7. The injection valve core riveting machine according to claim 6, characterized in that: A protective cover is fixedly mounted on the mounting seat, the sensor head is inserted into the protective cover and can move up and down relative to the protective cover, and the protective cover passes through the avoidance hole to block the sensor head and the lower pressure plate.

8. The injection valve core riveting machine according to claim 1, characterized in that: The fixed seat includes a base plate and a limit block installed on the base plate, the base plate can support the valve core housing, the limit block is provided with a first positioning groove, and the movable seat is provided with a second positioning groove toward the first positioning groove, and the first positioning groove and the second positioning groove can enclose and limit the horizontal position of the valve core housing.

9. The injection valve core riveting machine according to claim 8, characterized in that: The first positioning groove and the second positioning groove are both semi-cylindrical.

10. The injection valve core riveting machine according to claim 8, characterized in that: The frame is provided with a horizontal guide rail and a second cylinder, the movable seat is slidably connected to the horizontal guide rail, the piston rod of the second cylinder is connected to the movable seat, and the second cylinder can drive the movable seat to slide on the horizontal guide rail to make the second positioning groove close to or away from the first positioning groove.

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