A spring fatigue detection device and detection method for spring production

Abstract

The present invention relates to a spring fatigue detection device and a detection method for spring production applied to the field of spring fatigue detection. The fatigue detection device comprises a base, a protection mechanism, a detection structure and an intelligent protector; the protection mechanism comprises two protection half-cases arranged on both sides of the spring to be tested, a push rod connected to the protection half-cases, and a force storage spring corresponding to each protection half-case; the detection mechanism comprises a movable seat and a fixed seat respectively corresponding to the two ends of the spring to be tested, and an image acquisition component installed on the base and arranged toward the spring to be tested; the intelligent protector is provided with a damage detection module, a protection module and a reminder module. With the above structure, when the deformation and collapse of the spring to be tested is detected through the set intelligent protector, the spring to be tested is quickly protected, the elastic state of the spring to be tested during compression in the experiment can be quickly judged, and the risk of damage to equipment and personnel caused by the damaged and broken spring to be tested is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of spring fatigue detection, and in particular to a spring fatigue detection device and a detection method for spring production. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. Parts made of elastic materials deform under the action of external force and return to their original shape after the external force is removed. Springs are generally made of spring steel. Existing bore probe plugs with self-locking functions all use self-locking springs. In the process of producing springs, we generally need to test the fatigue of the springs. Spring fatigue is one of the important indicators to measure its service life.

[0003] The invention patent with application number CN202211031074.2 discloses a spring fatigue detection device for spring production. The technical solution includes a processing table, a mounting plate is provided above the processing table, a conveying mechanism for driving the mounting plate to move in the horizontal direction is installed on the processing table, three mounting boxes are fixed at equal intervals on the mounting plate, and a first clamping mechanism for limiting the spring is installed in each of the mounting boxes; the invention realizes a spring fatigue detection device for spring production through the mutual cooperation between a first bidirectional screw rod, a first moving block, a fixing rod, a first arc-shaped rubber plate, and a second bidirectional screw rod, a second moving block, a supporting rod, and a second arc-shaped rubber plate. Springs of different sizes are now limited and clamped, which is beneficial to protecting the springs from bending deformation and not affecting the subsequent use of the springs; however, when the springs are fatigue tested, the outer ring of the springs is limited by an arc-shaped rubber plate, so that the springs receive additional support when they are compressed and deformed. The test results of the springs cannot be accurately obtained in the spring fatigue test experiment, and there are certain errors in the experimental results. In addition, during the spring fatigue test, the springs cannot be protected in a timely and effective manner when they break. The broken and damaged springs may damage the experimental equipment and, in severe cases, cause injuries to the experimenters, posing a great safety hazard. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that during the spring fatigue test, when the spring breaks, timely and effective protection cannot be provided. The broken and damaged spring may cause damage to the experimental equipment, and in severe cases, cause injury to the experimenters, posing a great safety hazard.

[0005] In order to solve the above problems, the present invention provides a spring fatigue detection device for spring production, comprising a base, an adjusting rod and a reciprocating rod are transversely inserted on the base, a spring to be tested is placed between the adjusting rod and the reciprocating rod, a cam reciprocating assembly is installed at one end of the reciprocating rod away from the adjusting rod, and also comprises a protection mechanism, a detection structure and an intelligent protector;

[0006] The protection mechanism includes two protection half-cases arranged on both sides of the spring to be tested, a push rod connected to the protection half-case, and a force storage spring corresponding to each protection half-case. The protection half-case is connected to the base through a push rod for transverse sliding. One end of the force storage spring is fixed to the base and the other end is fixed to the corresponding push rod. A linkage self-locking mechanism is arranged between the two push rods.

[0007] The detection mechanism includes a movable seat and a fixed seat respectively corresponding to the two ends of the spring to be tested, and an image acquisition component installed on the base and arranged toward the spring to be tested. The movable seat is connected to the reciprocating rod, and the end of the adjusting rod is provided with an air pressure cavity corresponding to the fixed seat, and an air pressure sensor is installed in the air pressure cavity;

[0008] The intelligent protector is installed on the base. A damage detection module, a protection module and a reminder module are provided on the intelligent protector. The damage detection module is electrically connected to the protection module and the reminder module respectively. The damage detection module is also electrically connected to the image acquisition component and the air pressure sensor. The protection module is electrically connected to the linkage self-locking mechanism, which is used to control the linkage self-locking mechanism to release the elastic potential energy accumulated in the storage spring.

[0009] In the above-mentioned spring fatigue testing equipment for spring production, the intelligent protector is set up to obtain the appearance state of the spring to be tested in real time during the fatigue testing process, and when the spring to be tested is detected to be deformed and collapsed, the spring to be tested is quickly protected. By detecting the air pressure data inside the air pressure chamber, the elastic state of the spring to be tested during compression in the experiment can be quickly judged, and reminders can be issued in time, reducing the risk of damage to equipment and personnel caused by damaged or broken springs to be tested.

[0010] As a further improvement of the present application, the linked self-locking mechanism includes a ring gear rotatably connected to the base, a ratchet installed on the ring gear, a pawl corresponding to the ratchet, and a telescopic cylinder installed on the base, the ratchet is installed at the output end of the telescopic cylinder, the ring gear is meshed with the two push rods through teeth, and the telescopic cylinder is electrically connected to the protection module.

[0011] As a further improvement of the present application, the fixing seat is plugged into the air pressure chamber, an air pipe connected to the air pressure chamber is installed on the adjusting rod, and a pressure gauge is installed at the end of the air pipe.

[0012] As a further improvement of the present application, an end of the adjusting rod away from the fixed seat is rotatably connected to an adjusting screw rod, the adjusting screw rod is threadedly connected to the base, and a turntable is installed on the end of the adjusting screw rod away from the adjusting rod.

[0013] As a further improvement of the present application, the cam reciprocating assembly includes a drive motor mounted on a base, a cam plate mounted on an output end of the drive motor, a connecting rod rotatably connected to the end of a reciprocating rod on the cam plate, and the drive motor is electrically connected to the protection module.

[0014] As another improvement of the present application, a top plate is provided on one side of the cam plate and is vertically slidably connected to the base. The top plate is mounted on the support plate. A telescopic cylinder 2 is mounted on the base. The output end of the telescopic cylinder 2 is connected to the support plate, and the telescopic cylinder 2 is electrically connected to the protection module.

[0015] As another improved supplement of the present application, a pressure sensor is installed between the top plate and the support plate, and the pressure sensor is electrically connected to the protection module.

[0016] As another improvement of the present application, the push rod and the protective half-sleeve are detachably connected, and the two protective half-sleeves are buckled together to form a cylindrical structure.

[0017] A detection method of a spring fatigue detection device for spring production in the present application comprises the following steps:

[0018] S1. Pull the push rod outward to the specified position, and the self-locking mechanism will lock the push rod position. Select a protective half-cover of the same size according to the length of the spring to be tested, and install the protective half-cover on the push rod;

[0019] S2. Turn the adjusting screw to adjust the distance between the adjusting rod and the reciprocating rod to match the length of the spring to be tested. Install the spring to be tested in the reciprocating rod and the adjusting rod, and insert the movable seat and the fixed seat into both ends of the spring to be tested.

[0020] S3, starting the cam reciprocating assembly to drive the reciprocating rod to reciprocate to perform fatigue testing on the spring to be tested;

[0021] S4. The appearance state of the spring to be tested is obtained in real time through the intelligent protector. When the deformation and collapse of the spring to be tested is detected, the linkage self-locking mechanism is controlled to buckle the protective half sleeve to the outside of the spring to be tested for protection. The elastic state of the spring to be tested during compression in the experiment is judged, and a prompt is issued in time.

[0022] To summarize, through the intelligent protector that is set up, the appearance state of the spring to be tested can be obtained in real time during the fatigue detection process, and when the deformation and collapse of the spring to be tested is detected, the spring to be tested can be quickly protected, that is, the force storage spring in the compressed state is controlled to quickly release the elastic potential energy, and the force storage spring pushes the corresponding protective half-set to quickly buckle onto the outer ring of the spring to be tested to wrap the spring to be tested, and by detecting the air pressure data inside the air pressure chamber, the elastic state of the spring to be tested during compression in the experiment can be quickly judged, the damage of the spring to be tested in the experiment can be quickly understood, and reminders can be issued in time, reducing the risk of damage to equipment and personnel caused by damaged and broken springs to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an overall schematic diagram of the first and second embodiments of the present application. Figure 1 ;

[0024] Figure 2 This is an overall schematic diagram of the first and second embodiments of the present application. Figure 2 ;

[0025] Figure 3 This is an overall schematic diagram of the first and second embodiments of the present application. Figure 3 ;

[0026] Figure 4 The first and second embodiments of the present application are schematic diagrams of the spring to be tested after rapid protection. Figure 1 ;

[0027] Figure 5 The first and second embodiments of the present application are schematic diagrams of the spring to be tested after rapid protection. Figure 2 ;

[0028] Figure 6 A cross-sectional view of the adjustment rod according to the first and second embodiments of the present application;

[0029] Figure 7 This is a schematic diagram of the structure of the linkage self-locking mechanism of the first and second implementation modes of the present application;

[0030] Figure 8 This is a control principle block diagram of the intelligent protector according to the first embodiment of the present application;

[0031] Fig. 9 Schematic diagram of the position of the cam reciprocating assembly and the top plate of the first and second embodiments of the present application;

[0032] Fig.10 This is a block diagram of the control principle of the intelligent protector according to the second embodiment of the present application.

[0033] Description of the numbers in the figure:

[0034] 1. Base; 2. Fixed seat; 3. Spring to be tested; 4. Movable seat; 5. Reciprocating rod; 6. Cam reciprocating assembly; 7. Intelligent protector; 8. Reminder module; 9. Adjusting rod; 10. Adjusting screw; 11. Air pipe; 12. Barometer; 13. Image acquisition assembly; 14. Protective half set; 15. Push rod; 16. Top plate; 17. Telescopic cylinder 2; 18. Force storage spring; 19. Linkage self-locking mechanism; 20. Ratchet; 21. Drive motor; 22. Cam plate; 23. Support plate; 24. Pressure sensor; 25. Air pressure chamber; 26. Air pressure sensor; 27. Telescopic cylinder 1; 28. Gear ring; 29. ​​Ratchet. DETAILED DESCRIPTION

[0035] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0036] The first implementation method:

[0037] Figure 1-Figure 8 A spring fatigue detection device for spring production is shown, comprising a base 1, an adjusting rod 9 and a reciprocating rod 5 are transversely inserted on the base 1, a spring 3 to be tested is placed between the adjusting rod 9 and the reciprocating rod 5, and a cam reciprocating assembly 6 is installed at the end of the reciprocating rod 5 away from the adjusting rod 9. By installing the spring 3 to be tested between the adjusting rod 9 and the reciprocating rod 5, the cam reciprocating assembly 6 drives the reciprocating rod 5 to move back and forth, thereby performing repeated compression tests on the spring 3 to be tested, and detecting the fatigue of the spring 3 to be tested. The device also comprises a protective mechanism, a detection structure and an intelligent protector 7; the protective mechanism comprises two protective half sleeves 14 arranged on both sides of the spring 3 to be tested, a push rod 15 connected to the protective half sleeve 14, and a push rod 15 connected to the protective half sleeve 14. Each protective half-cover 14 corresponds to a force storage spring 18, and the protective half-cover 14 is connected to the base 1 through a push rod 15 for transverse sliding. One end of the force storage spring 18 is fixed to the base 1, and the other end is fixed to the corresponding push rod 15. A linkage self-locking mechanism 19 is arranged between the two push rods 15. The linkage self-locking mechanism 19 controls the two push rods 15 to move inward or outward at the same time, and synchronously controls the two protective half-covers 14 to move inward or outward. When the protective half-covers 14 move outward synchronously, the force storage spring 18 is compressed, and the two protective half-covers 14 are quickly buckled on the outside of the spring 3 to be tested by quickly releasing the force storage spring 18, so that the spring 3 to be tested is quickly wrapped for protection.

[0038] In addition, the detection mechanism includes a movable seat 4 and a fixed seat 2 corresponding to the two ends of the spring 3 to be tested, respectively, and an image acquisition component 13 installed on the base 1 and arranged toward the spring 3 to be tested. The movable seat 4 is connected to the reciprocating rod 5. The end of the adjusting rod 9 is provided with an air pressure chamber 25 corresponding to the fixed seat 2. An air pressure sensor 26 is installed in the air pressure chamber 25. The movable seat 4 and the fixed seat 2 are installed at the two ends of the spring 3 to be tested, and the ends of the spring 3 to be tested can be better fixed. Each time the cam reciprocating assembly 6 controls the reciprocating rod 5 and the movable seat 4 to compress the spring 3 to be tested, the spring 3 to be tested will apply a force to the fixed seat 2, pushing the fixed seat 2 to be inserted into the air pressure chamber 25, increasing the internal air pressure of the air pressure chamber 25. When the spring 3 to be tested is fatigued, the spring 3 to be tested in the compressed state reduces the force applied to the fixed seat 2, and the air pressure in the inner cavity of the air pressure chamber 25 is reduced.

[0039] It is worth mentioning that the intelligent protector 7 is installed on the base 1, and a damage detection module, a protection module and a reminder module 8 are arranged on the intelligent protector 7. The damage detection module is electrically connected to the protection module and the reminder module 8 respectively. The damage detection module is also electrically connected to the image acquisition component 13 and the air pressure sensor 26. The protection module is electrically connected to the linkage self-locking mechanism 19, which is used to control the linkage self-locking mechanism 19 to quickly release the elastic potential energy accumulated in the storage spring 18. When the fatigue test of the spring 3 to be tested is performed, the spring 3 to be tested is installed between the movable seat 4 and the reciprocating rod 5, and the spring 3 to be tested is repeatedly compressed through the cam reciprocating component 6, and the number of times the spring 3 to be tested is compressed is recorded, so as to obtain the fatigue test data of the spring 3 to be tested. The fatigue data of the spring 3 is measured. During the test, the image data of the spring 3 to be tested when it is compressed and restored to a normal state is obtained in real time through the image acquisition component 13, and the above image data is transmitted to the damage detection module. The damage detection module sets the image data of the spring 3 to be tested when it is compressed and restored to a normal state sent by the image acquisition component 13 for the first time as the standard image data. The damage detection module compares the standard image data with the image data continuously sent by the image acquisition component 13. When the comparison result shows that the difference between the two images is large, the spring 3 to be tested is in a fatigue state and damaged. At this time, the damage detection module sends a signal that the spring 3 to be tested is damaged to the reminder module 8. The wake-up module 8 emits an audible and visual warning, and at the same time, the damage detection module sends a rapid protection signal to the protection module. The protection module controls the linkage self-locking mechanism 19 to quickly release the elastic potential energy accumulated in the force storage spring 18. At this time, the force storage spring 18 pushes the corresponding protective half-cover 14 to quickly buckle onto the outer ring of the spring 3 to be tested, wrapping the spring 3 to be tested, thereby reducing the risk of damage to equipment and personnel caused by the damaged or broken spring 3 to be tested; in addition, when performing fatigue testing, the air pressure sensor 26 sends the detected air pressure data to the damage detection module in real time. The damage detection module sets the air pressure data sent by the air pressure sensor 26 for the first time as the standard air pressure data, and the damage detection module compares the air pressure data with the air pressure sensor 26 continuously. The sent air pressure data are compared. When the comparison result shows that the air pressure data of the two have dropped significantly (exceeding the normal range of air pressure data drop preset in the damage detection module), the spring 3 to be tested is in a fatigue state. At this time, the damage detection module sends a signal that the spring 3 to be tested is damaged to the reminder module 8, and the reminder module 8 issues an audible and visual warning. At the same time, the damage detection module sends a rapid protection signal to the protection module, and the protection module controls the linkage self-locking mechanism 19 to quickly release the elastic potential energy accumulated in the force storage spring 18. At this time, the force storage spring 18 pushes the corresponding protection half sleeve 14 to quickly buckle onto the outer ring of the spring 3 to be tested, wrapping the spring 3 to be tested, reducing the risk of damage to equipment and personnel caused by the damaged and broken spring 3 to be tested.

[0040] See also Figure 5 and Figure 8The linkage self-locking mechanism 19 includes a gear ring 28 rotatably connected to the base 1, a ratchet 29 installed on the gear ring 28, a pawl 20 corresponding to the ratchet 29, and a telescopic cylinder 27 installed on the base 1. The ratchet 29 is installed at the output end of the telescopic cylinder 27. The gear ring 28 is meshed with the two push rods 15 through teeth. The telescopic cylinder 27 is electrically connected to the protection module. When the push rod 15 is pulled to drive the two protection half-sleeves 14 to expand outward, the gear ring 28 drives the ratchet 29 to rotate synchronously. The push rod 15 gradually compresses and accumulates the force storage spring 18, and when the push rod 15 stops pulling, the pawl 20 locks the ratchet 29 to restrict the rotation of the gear ring 28. At this time, the pawl 20 is controlled by the telescopic cylinder 27 to move away from the ratchet 29, the ratchet 29 is unlocked, and the elastic force of the force storage spring 18 is released. The force storage spring 18 quickly controls the protection half-sleeve 14 to buckle to the outer ring of the spring 3 to be tested.

[0041] Through the above design, when the damage detection module sends a quick protection signal to the protection module, the protection module controls the telescopic cylinder 27 to shorten the preset time and then reset. At this time, the telescopic cylinder 27 controls the pawl 20 to disengage from the ratchet 29 and reset after a preset time, so as to quickly release the elastic potential energy accumulated in the force storage spring 18, and quickly buckle the protection half sleeve 14 to the outer ring of the spring 3 to be tested, so as to protect the spring 3 to be tested that is about to be damaged and reduce damage to equipment and personnel.

[0042] Preferably, an air pipe 11 connected to the air pressure chamber 25 is installed on the adjusting rod 9, and a pressure gauge 12 is installed on the end of the air pipe 11. The air pressure data in the air pressure chamber 25 can be displayed in real time through the pressure gauge 12, which is convenient for the experimenter to intuitively understand the air pressure data of the air pressure chamber 25 on site and understand the experimental status. The push rod 15 and the protective half-sleeve 14 are detachably connected, and the two protective half-sleeves 14 are buckled to form a cylindrical structure. Protective half-sleeves 14 of different sizes can be replaced according to different models of springs 3 to be tested, so that the protective half-sleeve 14 can be quickly buckled onto the outer ring of the corresponding model of the spring 3 to be tested, thereby achieving a better protective effect.

[0043] In addition, an end of the adjusting rod 9 away from the fixed seat 2 is rotatably connected to an adjusting screw 10, and the adjusting screw 10 is threadedly connected to the base 1. A turntable is installed on the end of the adjusting screw 10 away from the adjusting rod 9. The position of the adjusting rod 9 is adjusted by rotating the adjusting screw 10, so as to adjust according to different lengths of the spring 3 to be tested, and limit the spring 3 to be tested in a normal state.

[0044] It is worth mentioning that the cam reciprocating assembly 6 includes a driving motor 21 installed on the base 1, and a cam plate 22 installed on the output end of the driving motor 21. The cam plate 22 is rotatably connected to a connecting rod rotatably connected to the end of the reciprocating rod 5. The driving motor 21 is electrically connected to the protection module. The rotation of the cam plate 22 is controlled by the driving motor 21, and the reciprocating rod 5 is synchronously driven to move back and forth through the connecting rod to reciprocate and compress the spring 3 to be tested. When the damage detection module sends a rapid protection signal to the protection module, the protection module will control the driving motor 21 to stop working to avoid the protection half sleeve 14 from causing damage to the detection equipment when the protection half sleeve 14 is buckled on the spring 3 to be tested.

[0045] The second implementation method:

[0046] Figure 2 and Figure 9-10 It is shown that, different from the first embodiment, a top plate 16 is provided on one side of the cam plate 22, and is vertically slidably connected to the base 1, the top plate 16 is installed on the support plate 23, and a telescopic cylinder 2 17 is installed on the base 1, and the output end of the telescopic cylinder 2 17 is connected to the support plate 23, and the telescopic cylinder 2 17 is electrically connected to the protection module. The support plate 23 and the top plate 16 are controlled to move up synchronously by the telescopic cylinder 2 17, which can limit the position of the cam plate 22, so that when the cam plate 22 stops, the reciprocating rod 5 is in a state where the spring 3 to be tested is not compressed. At this time, the elastic potential energy accumulated in the spring 3 to be tested is released, reducing the breakage of the spring 3 to be tested, and the spring 3 to be tested is in a non-compressed state, which is convenient for the protective half-cover 14 to better buckle the spring 3 to be tested, and the movable seat 4 and the fixed seat 2 at both ends of the spring 3 to be tested are not wrapped by the protective half-cover 14, reducing damage to the movable seat 4 and the fixed seat 2, and reducing damage to the equipment.

[0047] In addition, a pressure sensor 24 is installed between the top plate 16 and the support plate 23. The pressure sensor 24 is electrically connected to the protection module. When the damage detection module sends a rapid protection signal to the protection module, the protection module is in a rapid protection state. At this time, the protection module controls the extension of the telescopic cylinder 17, and the top plate 16 moves up to one side of the cam plate 22 and limits the movement of the cam plate 22. When the top plate 16 contacts the cam plate 22, it is subjected to external force. At this time, the pressure sensor 24 sends the received pressure data to the protection module, and the protection module controls the drive motor 21 to stop working, and at the same time controls the shortening of the telescopic cylinder 1 27, so that the protective half sleeve 14 is quickly buckled onto the outer ring of the spring 3 to be tested, so as to protect the spring 3 to be tested that is about to be damaged and reduce damage to equipment and personnel.

[0048] A method for detecting a spring fatigue detection device for spring production, comprising the following steps:

[0049] S1, pull the push rod 15 outward to the specified position, the linkage self-locking mechanism 19 locks the position of the push rod 15, select the protective half sleeve 14 of the same size according to the size and length of the spring 3 to be tested, and install the protective half sleeve 14 on the push rod 15;

[0050] S2, rotate the adjusting screw 10 to adjust the distance between the adjusting rod 9 and the reciprocating rod 5 to adapt to the length of the spring 3 to be tested, install the spring 3 to be tested in the reciprocating rod 5 and the adjusting rod 9, and insert the movable seat 4 and the fixed seat 2 into both ends of the spring 3 to be tested;

[0051] S3, start the cam reciprocating assembly 6 to drive the reciprocating rod 5 to reciprocate to perform fatigue detection on the spring 3 to be tested;

[0052] S4. The appearance state of the spring 3 to be tested is obtained in real time through the intelligent protector 7. When the deformation and collapse of the spring 3 to be tested is detected, the linkage self-locking mechanism 19 is controlled to buckle the protective half sleeve 14 to the outside of the spring 3 to be tested for protection, and the elastic state of the spring 3 to be tested during compression in the experiment is judged, and a reminder is issued in time.

[0053] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A spring fatigue testing device for spring production, comprising a base (1), an adjusting rod (9) and a reciprocating rod (5) being laterally inserted on the base (1), a spring (3) to be tested being placed between the adjusting rod (9) and the reciprocating rod (5), a cam reciprocating assembly (6) being installed at one end of the reciprocating rod (5) away from the adjusting rod (9), characterized in that: It also includes protection mechanisms, detection mechanisms and intelligent protectors (7); The protection mechanism comprises two protection half sleeves (14) arranged on both sides of the spring (3) to be tested, a push rod (15) connected to the protection half sleeve (14), and a force storage spring (18) corresponding to each protection half sleeve (14), wherein the protection half sleeve (14) is connected to the base (1) in a transverse sliding manner via the push rod (15), one end of the force storage spring (18) is fixed to the base (1), and the other end is fixed to the corresponding push rod (15), and a linkage self-locking mechanism (19) is provided between the two push rods (15); The detection mechanism comprises a movable seat (4) and a fixed seat (2) respectively corresponding to the two ends of the spring (3) to be tested, and an image acquisition component (13) mounted on the base (1) and arranged toward the spring (3) to be tested, the movable seat (4) being connected to the reciprocating rod (5), and an air pressure cavity (25) corresponding to the fixed seat (2) being formed at the end of the adjustment rod (9), and an air pressure sensor (26) being installed in the air pressure cavity (25); The intelligent protector (7) is mounted on a base (1), and is provided with a damage detection module, a protection module and a reminder module (8). The damage detection module is electrically connected to the protection module and the reminder module (8), respectively. The damage detection module is also electrically connected to an image acquisition component (13) and an air pressure sensor (26). The protection module is electrically connected to a linkage self-locking mechanism (19) and is used to control the linkage self-locking mechanism (19) to release the elastic potential energy stored in the storage spring (18). The linkage self-locking mechanism (19) comprises a gear ring (28) rotatably connected to the base (1), a ratchet (29) mounted on the gear ring (28), a pawl (20) corresponding to the ratchet (29), and a telescopic cylinder (27) mounted on the base (1), wherein the ratchet (29) is mounted at the output end of the telescopic cylinder (27), the gear ring (28) meshes with the two push rods (15) through teeth, and the telescopic cylinder (27) is electrically connected to the protection module.

2. A spring fatigue detection device for spring production according to claim 1, characterized in that: The fixing seat (2) is plugged into the air pressure chamber (25), an air pipe (11) connected to the air pressure chamber (25) is installed on the adjusting rod (9), and a pressure gauge (12) is installed at the end of the air pipe (11).

3. The spring fatigue detection device for spring production according to claim 1, characterized in that: The end of the adjusting rod (9) away from the fixing seat (2) is rotatably connected to an adjusting screw rod (10), the adjusting screw rod (10) is threadedly connected to the base (1), and the end of the adjusting screw rod (10) away from the adjusting rod (9) is equipped with a rotating disk.

4. The spring fatigue detection device for spring production according to claim 1, characterized in that: The cam reciprocating assembly (6) comprises a drive motor (21) mounted on the base (1), and a cam plate (22) mounted on the output end of the drive motor (21); a connecting rod rotatably connected to the cam plate (22) and rotatably connected to the end of the reciprocating rod (5); and the drive motor (21) is electrically connected to the protection module.

5. A spring fatigue detection device for spring production according to claim 4, characterized in that: A top plate (16) is provided on one side of the cam plate (22) and is vertically slidably connected to the base (1); the top plate (16) is mounted on a support plate (23); a second telescopic cylinder (17) is mounted on the base (1); an output end of the second telescopic cylinder (17) is connected to the support plate (23); and the second telescopic cylinder (17) is electrically connected to a protection module.

6. A spring fatigue detection device for spring production according to claim 5, characterized in that: A pressure sensor (24) is installed between the top plate (16) and the support plate (23), and the pressure sensor (24) is electrically connected to the protection module.

7. A spring fatigue detection device for spring production according to claim 6, characterized in that: The push rod (15) and the protective half sleeve (14) are detachably connected, and the two protective half sleeves (14) are buckled together to form a cylindrical structure.

8. A method for detecting spring fatigue of a spring production device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, pull the push rod (15) outward to a specified position, the self-locking mechanism (19) is linked to lock the position of the push rod (15), select a protective half sleeve (14) of the same size according to the size and length of the spring (3) to be tested, and install the protective half sleeve (14) on the push rod (15); S2, rotating the adjusting screw (10) to adjust the distance between the adjusting rod (9) and the reciprocating rod (5) so as to adapt the distance between the adjusting rod (9) and the reciprocating rod (5) to the length of the spring (3) to be tested, installing the spring (3) to be tested in the reciprocating rod (5) and the adjusting rod (9), and inserting the movable seat (4) and the fixed seat (2) into both ends of the spring (3) to be tested; S3, starting the cam reciprocating assembly (6) to drive the reciprocating rod (5) to reciprocate and perform fatigue testing on the spring (3) to be tested; S4. The appearance state of the spring to be tested (3) is obtained in real time through the intelligent protector (7). When the deformation and collapse of the spring to be tested (3) is detected, the linkage self-locking mechanism (19) is controlled to buckle the protective half sleeve (14) to the outside of the spring to be tested (3) for protection. The elastic state of the spring to be tested (3) during compression in the experiment is determined, and a prompt is issued in time.

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