A chain pin pressure force detection device and operation method thereof

Abstract

The present invention relates to the field of chain detection technology, and provides a chain pin extrusion force detection device, which aims to solve the problems that the existing pin extrusion detection equipment is bulky, complex in structure, expensive, and has high use cost, and the operation procedure is too cumbersome, and when detecting the extrusion force of the chain link, the automation and continuity are low, and the detection efficiency is also extremely slow. The present invention comprises a long strip frame and a chain detection platform, a slide module and a rear guard plate arranged in sequence from front to back at the upper end of the frame, a chain to be detected arranged in parallel with the slide module is placed below the chain detection platform, and an extrusion force detection mechanism is installed in the slide module; the extrusion force detection mechanism comprises an output force cylinder base slidably installed above the slide of the slide module, and a vertically arranged servo motor is installed on the side wall of the output force cylinder base. The present invention is particularly suitable for the automatic and efficient extrusion force detection of chain pins, and has high social use value and application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of chain detection, and in particular to a chain pin shaft pressing force detection device and an operating method thereof. Background Art

[0002] Chains are generally metal links or rings, mostly used for mechanical transmission and traction. Conveying chains are mainly composed of two basic parts: a hinged chain plate and a pin. They have a continuous flat top surface and are mainly suitable for conveying objects. The conveying surface of the chain is flat and smooth, with low friction, and the transition of materials between conveyor lines is smooth. It can convey various materials such as glass bottles, PET bottles, cans, and various bags. The chain can turn, climb, and convey at a fast speed, making it suitable for conveying small items.

[0003] After the production of the chain is completed, the pins need to be tested for extrusion force to ensure that the chain will not break due to the pins slipping after being put into use, which will cause damage to the conveyed items. The existing pin extrusion detection equipment generally uses a universal material testing machine. The whole set of equipment is large in size, complex in structure, expensive, and has a high cost of use. It is not economical to equip small and medium-sized enterprises with such equipment. In addition, the operation procedures of the universal material testing machine are too cumbersome. When testing the extrusion force of the chain links, the degree of automation and continuity is low, and the detection efficiency is also extremely slow.

[0004] The patent with publication number CN203274991U discloses a chain extrusion force testing machine, which includes a base and a bracket connected to the base, a chain link seat is provided on the base, a cushion block is provided on the chain link seat, a force sensor is provided in the chain link seat, the force sensor is connected to a display instrument, and a power transmission device matched with the chain link seat is provided on the bracket. The device has a simple structure, low cost, and is easy to operate. However, the device has the disadvantages of being unsuitable for chains and having low efficiency. For this reason, we propose a chain pin shaft extrusion force detection device and an operating method thereof. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a chain pin extrusion force detection device and an operating method thereof, which overcomes the shortcomings of the prior art, has a reasonable design and a compact structure, and aims to solve the problems of the existing pin extrusion detection equipment, such as the large size of the entire set of equipment, the complex structure, the high price, the high cost of use, and the overly cumbersome operating procedures, and the low degree of automation and continuity when detecting the extrusion force of the chain links, and the extremely slow detection efficiency.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A chain pin pressure-out force detection device comprises a long strip frame and a chain detection platform, a slide module and a rear protection plate arranged in sequence from front to back on the upper end of the frame, a chain to be detected arranged parallel to the slide module is placed under the chain detection platform, and a pressure-out force detection mechanism is installed in the slide module;

[0010] The pressing force detection mechanism includes an output force cylinder base slidably mounted above the slide of the slide module, a vertically arranged servo motor is mounted on the side wall of the output force cylinder base, a planetary reducer is mounted at the output below the servo motor, an output gear is mounted at the output end of the planetary reducer, and the output gear is meshed with a rack on the slide module, a top plate extending forward to the chain detection platform is horizontally mounted at the upper end of the output force cylinder base, and a positioning cylinder is vertically mounted on the upper side of the front end of the top plate, the telescopic end of the positioning cylinder passes through the top plate and is mounted with a chain link positioning sleeve, and a chain link positioning head matching the hinge roll on the chain to be detected is mounted at the lower end of the chain link positioning sleeve;

[0011] It also includes an extrusion cylinder installed in the output force cylinder base, and the telescopic end of the extrusion cylinder passes through the front wall of the output force cylinder base and is installed with a pin seat, and the pin seat is installed with an extrusion force pin for testing the extrusion force of the pin shaft on the chain to be tested, and a pressure sensor is installed between the connecting part of the extrusion force pin and the pin seat.

[0012] Preferably, both ends of the chain detection platform are respectively provided with a front positioning mechanism and a pre-tensioning mechanism for tensioning the chain to be detected.

[0013] Preferably, the front positioning mechanism includes two positioning seats installed in parallel on one side of the chain detection platform, and a positioning tongue for fixing the head end of the chain to be detected is provided on the side between the two positioning seats close to the pre-tensioning mechanism, and a moving rod is symmetrically installed on one end of the positioning tongue located between the two positioning seats, and the moving rod is slidably installed in a lifting through hole vertically opened on the side wall of the positioning seat.

[0014] Preferably, the pre-tensioning mechanism includes a horizontally arranged screw, a screw seat is provided on a threaded sleeve of the screw, and the screw seat is fixedly mounted on the upper end of the chain detection platform, a handwheel is installed at one end of the screw facing away from the front positioning mechanism, the other end of the screw is integrally formed with an end face bearing, and a tension sensor is installed at the other end of the end face bearing, a tension chain link head for fixing the end of the chain to be detected is installed at the other end of the tension sensor, a tension chain link head is provided with a tension shaft seat, and the tension shaft seat is fixedly mounted on the upper end of the chain detection platform.

[0015] Preferably, a positioning bar is fixedly installed on the chain detection platform for positioning the front side of the chain during detection.

[0016] Preferably, a plurality of rack foot cups are installed at the lower end of the rack, and the rack foot cups are heavy-load foot cups.

[0017] Preferably, a power supply chassis is installed on the rack, and the power supply chassis has a power switch, a servo drive, a circuit breaker, a relay, and a DC power supply block built in.

[0018] Preferably, a laser distance sensor for determining the position of the movable hinge on the chain to be detected is installed on the bottom wall of the top plate.

[0019] Preferably, an industrial computer is installed on the chain detection platform via a bracket, the industrial computer is provided with a touch screen, and the industrial computer is provided with a buzzer, a power switch, and an emergency stop button.

[0020] The present invention also provides an operating method of a chain pin pressure force detection device, comprising the following steps:

[0021] S1. Place the chain to be tested on the upper end of the chain testing platform, connect and fix the head end of the product to be tested with the positioning tongue, connect the tail end of the product to be tested with the tension chain link head, turn the hand wheel, and tighten the chain to be tested through the threaded connection of the screw on the screw seat to pre-tension the chain to be tested;

[0022] S2. The pressing force detection mechanism is started through the industrial computer. The servo motor is decelerated by the planetary reducer and then meshes with the rack on the slide module, driving the output force cylinder base to intermittently move along the slide module according to the set pulse distance. The laser distance sensor simultaneously detects the active hinge of the chain to be detected, the output force cylinder base stops moving, and the positioning cylinder drives the chain link positioning head on the chain link positioning sleeve to move downward and guides and positions the fixed hinge of the chain to be detected;

[0023] S3. The extrusion cylinder drives the extrusion force ejector to move forward. The front end of the extrusion force ejector pushes the pin of the chain to be tested. The pressure sensor is used to detect the extrusion force. The initial thrust of the extrusion cylinder is set to 1KN. The detection time starts from the time when the extrusion cylinder is in place. During this process, if the pin is loosened and displaced, the initial thrust of the cylinder decreases. If it is lower than the thrust value set by the industrial computer, a signal is output to the buzzer, and the buzzer sounds an alarm and controls the shutdown. After the operator marks the unqualified part, it is restarted and the detection device continues to detect. If the pin is not loosened and displaced, the next chain link is detected until all the pin detection processes are completed.

[0024] (III) Beneficial effects

[0025] The embodiment of the present invention provides a chain pin pressure force detection device and an operation method thereof, which has the following beneficial effects:

[0026] 1. Through the setting of the extrusion force detection mechanism, when the positioning cylinder reaches the positioning point, a feedback signal is sent to the industrial computer. The industrial computer outputs a signal to drive the extrusion cylinder to move, and pushes the extrusion force pin fixed on the pressure sensor to perform extrusion force detection on the chain to be detected; in this embodiment, the initial setting thrust of the extrusion cylinder is 1KN, and the detection time starts from the time when the extrusion cylinder is in place. During this process, if the pin shaft is loosened and displaced, the initial setting thrust of the extrusion cylinder decreases, and if it is lower than the thrust value set by the industrial computer, a signal is output to the buzzer, the buzzer sounds an alarm, and the machine is stopped and restarted after the operator marks it as unqualified, and the detection equipment continues to detect; if the pin shaft is not loosened and displaced, the next chain link will continue to be detected, and the entire process flow is completed.

[0027] 2. The front positioning mechanism and the pre-tensioning mechanism are combined to realize the positioning of the head of the chain to be tested. Combined with the pre-tensioning and tensioning of the tail of the chain to be tested, it is ensured that the chain plate will not be damaged during the detection and loading and unloading process. At the same time, the chain to be tested is tightened and pre-tensioned to eliminate the inter-node gap during measurement. At the same time, the chain is simulated under load, and the load exerts a tensile effect on the chain hinge, so that the extrusion force can be tested closer to the use environment, making the test data more meaningful for practical reference.

[0028] 3. Through the setting of laser distance sensor, the moving distance of the slide is determined in cooperation with the servo motor drive. When the moving pulse amount and the laser distance sensor detect that the hinge of the chain to be detected are satisfied at the same time, the chain link positioning head will move downward to locate the chain link to be detected in the chain to be detected, so as to ensure accurate positioning and accurate detection.

[0029] 4. In the present invention, the pressing force ejector is driven by the pressing cylinder to detect the pressing force of the positioned chain pin shaft. The equipment has a reasonable structure, a high degree of standardization, easy processing of wearing parts and good interchangeability, and can efficiently realize the automatic detection of the chain pin shaft pressing force and chain length. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The preferred implementation scheme will be described below in a clear and understandable manner in conjunction with the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of a chain pin pressure force detection device and its operation method.

[0031] Figure 1 It is a schematic diagram of the structure of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the pressing and pushing mechanism in the present invention;

[0033] Figure 3 It is a structural schematic diagram of the pre-tensioning mechanism in the present invention;

[0034] Figure 4 It is a structural schematic diagram of the chain front positioning mechanism in the present invention.

[0035] In the figure: frame 1, chain detection platform 2, rear guard plate 3, slide module 4, extrusion force detection mechanism 6, output force cylinder base 61, top plate 62, extrusion cylinder 63, extrusion force ejector 64, positioning cylinder 65, chain link positioning sleeve 66, chain link positioning head 67, servo motor 68, planetary reducer 69, servo control box 610, pressure sensor 611, industrial computer 7, power supply chassis 8, pre-tensioning mechanism 9, screw 91, hand wheel 92, screw seat 93, end bearing 94, tension chain link head 95, tension shaft seat 96, tension sensor 97, front positioning mechanism 10, positioning seat 101, positioning tongue 102, moving rod 103, lifting through hole 104, positioning bar 11, frame foot cup 12, chain a to be detected. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 The present invention is further described with examples:

[0037] Example 1

[0038] A chain pin pressure force detection device comprises a long frame 1 and a chain detection platform 2, a slide module 4 and a rear guard plate 3 arranged in sequence from front to back on the upper end of the frame 1, a chain to be detected arranged parallel to the slide module 4 is placed below the chain detection platform 2, and a pressure force detection mechanism 6 is installed in the slide module 4;

[0039] In this embodiment, Figure 1 As shown, the pressing force detection mechanism 6 includes an output force cylinder base 61 slidably mounted above the slide of the slide module 4, a vertically arranged servo motor 68 is mounted on the side wall of the output force cylinder base 61, a planetary reducer 69 is mounted at the output below the servo motor 68, an output gear is mounted at the output end of the planetary reducer 69, and the output gear is meshed with the rack on the slide module 4, a top plate 62 extending forward to the chain detection platform 2 is horizontally mounted on the upper end of the output force cylinder base 61, and a positioning cylinder 65 is vertically mounted on the upper side of the front end of the top plate 62, the telescopic end of the positioning cylinder 65 passes through the top plate 62 and is mounted with a chain link positioning sleeve 66, and the lower end of the chain link positioning sleeve 66 is mounted with a chain link positioning head 67 matching the hinge roll on the chain to be detected;

[0040] It also includes an extrusion cylinder 63 installed in the output force cylinder base 61, and the telescopic end of the extrusion cylinder 63 passes through the front wall of the output force cylinder base 61 and is installed with a pin seat, and the pin seat is installed with an extrusion force pin 64 for testing the extrusion force of the pin shaft on the chain to be tested, and a pressure sensor 611 is installed between the connection part of the extrusion force pin 64 and the pin seat.

[0041] In this embodiment, Figure 1 As shown, the two ends of the chain detection platform 2 are respectively provided with a front positioning mechanism 10 and a pre-tensioning mechanism 9 for tensioning the chain to be detected;

[0042] In this embodiment, Figure 4 As shown, the front positioning mechanism 10 includes two positioning seats 101 installed in parallel on one side of the chain detection platform 2, and a positioning tongue 102 for fixing the head end of the chain to be detected is provided on one side between the two positioning seats 101 close to the pre-tensioning and tensioning mechanism 9, and a moving rod 103 is symmetrically installed at one end of the positioning tongue 102 located between the two positioning seats 101, and the moving rod 103 is slidably installed in a lifting through hole 104 vertically opened on the side wall of the positioning seat 101, and cooperates with the pre-tensioning and tensioning mechanism 9 to realize the pre-tensioning and tensioning of the chain a to be detected.

[0043] In this embodiment, Figure 3 As shown, the pre-tensioning mechanism 9 includes a horizontally arranged screw rod 91, a screw rod seat 93 is threadedly sleeved on the screw rod 91, and the screw rod seat 93 is fixedly mounted on the upper end of the chain detection platform 2, a hand wheel 92 is mounted on the end of the screw rod 91 away from the front positioning mechanism 10, and an end bearing 94 is integrally formed at the other end of the screw rod 91, and a tension sensor 97 is mounted at the other end of the end bearing 94, and a tension chain link head 95 for fixing the end of the chain to be detected is mounted on the other end of the tension sensor 97. Tension shaft seat 96, and tension shaft seat 96 is fixedly installed on the upper end of chain detection platform 2, the end of chain a to be detected is connected to tension chain link head 95, and hand wheel 92 is turned to tighten chain a to be detected through threaded connection of screw 91 on screw seat 93, and pre-tension chain a to be detected to eliminate inter-link gap during measurement, and at the same time simulate the chain under load, and the load exerts a tensile effect on the chain hinge, so that the extrusion force can be detected closer to the use environment, so that the detection data has more practical reference significance;

[0044] In this embodiment, the pre-tensioning force is directly read on the display screen of the industrial computer 7 through the tension sensor 17. When the pre-tensioning force reaches 1 / 3 of the tensile load, it stays for 30 seconds and then is released.

[0045] In this embodiment, Figure 1 As shown, a positioning bar 11 is fixedly installed on the chain detection platform 2, which is used to position the front side of the chain during detection. When the pressure detection mechanism 6 is working, the pitch of the chain a to be detected is measured. On the one hand, the chain length detection and the front side positioning of the chain a to be detected can be carried out, and on the other hand, it is convenient to initialize the industrial computer 7 to set data for detection.

[0046] In this embodiment, Figure 1As shown, a plurality of rack foot cups 12 are installed at the lower end of the rack 1, and the rack foot cups 12 are heavy-duty foot cups to ensure stable support and stable detection of the detection equipment.

[0047] In this embodiment, Figure 1 As shown, a power supply chassis 8 is installed on the frame 1, and the power supply chassis 8 has a power switch, a servo driver, a circuit breaker, a relay, and a DC power supply block built in. The power switch is used for opening and closing the power supply and connection control, the delay device is used to cooperate with the intermittent motion setting of the reduction motor 68, the circuit breaker and the relay are used to protect the circuit safety, and the DC power supply block is used for current transmission of various electrical components of the equipment, which is convenient for maintenance.

[0048] In this embodiment, a laser distance sensor for determining the position of the movable hinge on the chain a to be detected is installed on the bottom wall of the top plate 62. When driven by the reduction motor 68, the moving distance of the output force cylinder base 61 is determined. When the moving pulse amount and the laser distance sensor detect that the hinge of the chain a to be detected are satisfied at the same time, the chain link positioning head 67 will move downward to locate the chain link to be detected in the chain a to be detected.

[0049] In this embodiment, Figure 1 As shown, an industrial computer 7 is installed on the chain detection platform 2 through a bracket. The industrial computer 7 is provided with a touch screen, a buzzer, a power switch, and an emergency stop button. The industrial computer 7 is connected to the extrusion cylinder 63, the positioning cylinder 65, the reduction motor 68, the servo control box 610, the pressure sensor 611, the tension sensor 97 and the lifting cylinder through electrical control lines. The industrial computer 7 is used to coordinate and control the coordinated operation of various mechanisms to automatically realize the extrusion force detection of the chain a to be detected.

[0050] In this embodiment, when the positioning cylinder 65 reaches the positioning point, a feedback signal is sent to the industrial computer 7, and the industrial computer 7 outputs a signal to drive the extrusion cylinder 63 to move, pushing the extrusion force ejector pin 64 fixed on the pressure sensor 611 to perform extrusion force detection on the chain a to be detected; in this embodiment, the initial setting thrust of the extrusion cylinder 63 is 1KN, and the detection time starts from the time when the extrusion cylinder 63 is in place. The detection time can be modified on the touch screen of the industrial computer 7 according to actual needs. During this process, if the pin shaft is loosened and displaced, the initial setting thrust of the extrusion cylinder 63 decreases, and if it is lower than the thrust value set by the industrial computer 7, a signal is output to the buzzer, and the buzzer sounds an alarm, and the machine is stopped and restarted after the operator marks it as unqualified, and the detection equipment continues to detect; if the pin shaft is not loosened and displaced, the next chain link will continue to be detected, and the entire process flow is completed.

[0051] Example 2

[0052] This embodiment also provides an operation method based on the above-mentioned chain pin pressure force detection device, comprising the following steps:

[0053] S1. Place the chain to be tested on the upper end of the chain testing platform 2. The head end of the product to be tested is connected and fixed to the positioning tongue 102. The tail end of the product to be tested is connected to the tension chain link head 95. Turn the hand wheel 92 to tighten the chain to be tested through the threaded connection of the screw 91 on the screw seat 93 to pre-tension the chain to be tested.

[0054] S2, the pressing force detection mechanism 6 is started by the industrial computer 7, the servo motor 68 is decelerated by the planetary reducer 69 and then meshes with the rack on the slide module 4, driving the output force cylinder base 61 to intermittently move along the slide module 4 according to the set pulse amount distance, and the laser distance sensor simultaneously detects the active hinge of the chain to be detected, the output force cylinder base 61 stops moving, and the positioning cylinder 65 drives the chain link positioning head 24 on the chain link positioning sleeve 23 downward to guide and position the fixed hinge of the chain to be detected;

[0055] S3, the extrusion cylinder 63 drives the extrusion force ejector 64 to move forward, and the front end of the extrusion force ejector 64 pushes the pin of the chain to be tested, and cooperates with the pressure sensor 611 to perform extrusion force detection. The initial setting thrust of the extrusion cylinder 63 is 1KN, and the detection time starts from the time when the extrusion cylinder 63 is in place. During this process, if the pin is loosened and displaced, the initial setting thrust of the cylinder decreases. If it is lower than the thrust value set by the industrial computer, a signal is output to the buzzer, and the buzzer sounds an alarm and controls the shutdown. After the operator marks it as unqualified, it restarts and the detection device continues to detect; if the pin is not loosened and displaced, continue to detect the next chain link until all pin detection procedures are completed.

[0056] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A chain pin pressure force detection device, comprising a long strip frame (1) and a chain detection platform (2), a slide module (4) and a rear guard plate (3) arranged in sequence from front to back on the upper end of the frame (1), characterized in that: A chain to be tested is placed below the chain testing platform (2) and is arranged parallel to the slide module (4), and a pressure output force testing mechanism (6) is installed in the slide module (4); The pressing force detection mechanism (6) comprises an output force cylinder base (61) slidably mounted above the slide of the slide module (4); a vertically arranged servo motor (68) is mounted on the side wall of the output force cylinder base (61); a planetary reducer (69) is mounted below the servo motor (68); an output gear is mounted on the output end of the planetary reducer (69), and the output gear meshes with a rack on the slide module (4); a top plate (62) extending forward to the chain detection platform (2) is horizontally mounted on the upper end of the output force cylinder base (61); a positioning cylinder (65) is vertically mounted on the upper side of the front end of the top plate (62); a telescopic end of the positioning cylinder (65) passes through the top plate (62) and is mounted with a chain link positioning sleeve (66); a chain link positioning head (67) matching the hinge on the chain to be detected is mounted on the lower end of the chain link positioning sleeve (66); It also includes an extrusion cylinder (63) installed in the output force cylinder base (61), and the telescopic end of the extrusion cylinder (63) penetrates the front wall of the output force cylinder base (61) and is installed with an ejector seat, and the ejector seat is installed with an extrusion force ejector (64) for testing the extrusion force of the pin shaft on the chain to be tested, and a pressure sensor (611) is installed between the connection part of the extrusion force ejector (64) and the ejector seat; Both ends of the chain detection platform (2) are respectively provided with a front positioning mechanism (10) and a pre-tensioning mechanism (9) for tensioning the chain to be detected; The front positioning mechanism (10) comprises two positioning seats (101) installed in parallel on one side of the chain detection platform (2), and a positioning tongue (102) for fixing the head end of the chain to be detected is provided on one side between the two positioning seats (101) and close to the pre-tensioning mechanism (9), and a moving rod (103) is symmetrically installed on one end of the positioning tongue (102) located between the two positioning seats (101), and the moving rod (103) is slidably installed in a lifting through hole (104) vertically opened on the side wall of the positioning seat (101); The pre-tensioning mechanism (9) comprises a screw rod (91) arranged horizontally, a screw rod seat (93) being threadedly sleeved on the screw rod (91), and the screw rod seat (93) being fixedly mounted on the upper end of the chain detection platform (2), a hand wheel (92) being mounted on one end of the screw rod (91) away from the front positioning mechanism (10), an end face bearing (94) being integrally formed on the other end of the screw rod (91), and a tension sensor (97) being mounted on the other end of the end face bearing (94), a tension chain link head (95) for fixing the end of the chain to be detected being mounted on the other end of the tension sensor (97), a tension shaft seat (96) being sleeved on the tension chain link head (95), and the tension shaft seat (96) being fixedly mounted on the upper end of the chain detection platform (2).

2. A chain pin pressure force detection device according to claim 1, characterized in that: A positioning bar (11) is fixedly mounted on the chain detection platform (2) and is used to position the front side of the chain during detection.

3. A chain pin pressure force detection device as claimed in claim 1, characterized in that: A plurality of rack foot cups (12) are installed at the lower end of the rack (1), and the rack foot cups (12) are heavy-load foot cups.

4. A chain pin pressure force detection device as claimed in claim 1, characterized in that: A power supply chassis (8) is installed on the frame (1), and the power supply chassis (8) has a power switch, a servo drive, a circuit breaker, a relay, and a DC power supply block built into it.

5. A chain pin pressure force detection device as claimed in claim 1, characterized in that: A laser distance sensor for determining the position of the movable hinge on the chain a to be detected is installed on the bottom wall of the top plate (62).

6. A chain pin pressure force detection device as claimed in claim 1, characterized in that: An industrial computer (7) is mounted on the chain detection platform (2) via a bracket, the industrial computer (7) is provided with a touch screen, and the industrial computer (7) is provided with a buzzer, a power switch, and an emergency stop button.

7. An operating method of a chain pin pressure force detection device, applied to the chain pin pressure force detection device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. Place the chain to be tested on the upper end of the chain testing platform (2), connect and fix the front end of the product to be tested to the positioning tongue (102), connect the rear end of the product to be tested to the tension chain link head (95), turn the hand wheel (92), and tighten the chain to be tested through the threaded connection of the screw rod (91) on the screw rod seat (93), so as to pre-tension the chain to be tested; S2, the pressing force detection mechanism (6) is started through the industrial control computer (7), the servo motor (68) is decelerated through the planetary reducer (69) and then meshes with the rack on the slide module (4), driving the output force cylinder base (61) to move intermittently along the slide module (4) according to the set pulse amount, the laser distance sensor simultaneously detects the active hinge of the chain to be detected, the output force cylinder base (61) stops moving, and the positioning cylinder (65) drives the chain link positioning head (24) on the chain link positioning sleeve (23) to move downward and guide and position the fixed hinge of the chain to be detected; S3, the extrusion cylinder (63) drives the extrusion force ejector (64) to move forward, and the front end of the extrusion force ejector (64) pushes the pin of the chain to be tested, and cooperates with the pressure sensor (611) to perform extrusion force detection. The initial setting thrust of the extrusion cylinder (63) is 1KN. The detection time starts from the time when the extrusion cylinder (63) is in place. During this process, if the pin is loosened and displaced, the initial setting thrust of the cylinder decreases. If it is lower than the thrust value set by the industrial computer, a signal is output to the buzzer, and the buzzer sounds an alarm and controls the shutdown. After the operator marks the unqualified, it restarts and the detection device continues to detect; if the pin is not loosened and displaced, the next chain link is detected until all pin detection processes are completed.

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