Method for preventing tightening device from being mistakenly screwed, tightening device and assembly equipment

Abstract

The invention discloses a method for preventing a tightening device from being screwed mistakenly, the tightening device and assembling equipment, and relates to the technical field of electric automobiles. The method for preventing the tightening device from being screwed mistakenly comprises the following steps that when the tightening device works, real-time working parameters of a tightening gun are obtained, the real-time working parameters comprise real-time torque and corresponding real-time rotation stroke parameters; the real-time working parameters are matched with theoretical working parameters corresponding to the current screwing piece, and the theoretical working parameters comprise theoretical torque and corresponding theoretical rotation stroke parameters; and when the matching is unsuccessful, judging that the tightening gun works wrongly. According to the technical scheme, error operation in tightening can be found in time, and therefore the operation quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicles, and in particular to a method for preventing wrong tightening of a tightening device, a tightening device, and assembly equipment. Background Art

[0002] The rear subframe stabilizer bar and stabilizer bar joint are important components of the automobile chassis. They are defined as key tightening items and need to be tightened with servo tools. The rear stabilizer bar and stabilizer bar joint of each vehicle model are tightened at the same position. The opposite side distance and torque of the stabilizer bar and stabilizer bar joint bolts of each vehicle model are different. Two different servo tools are required on one side and four servo tools are required on both sides to tighten. In addition to tightening the stabilizer bar and stabilizer bar joint, the current position also needs to tighten key parts such as the rear motor suspension. The current tightening requires switching tools back and forth, which adds too much non-value-added time and affects work efficiency.

[0003] To this end, in the prior art, different socket selectors are switched on the same servo tool, and the torque needs to be modified and switched at the same time. In this process, it is easy to only modify the socket to adapt to the mating distance without adapting and adjusting the torque, resulting in misoperation and reduced work quality. Summary of the invention

[0004] The main purpose of the present invention is to provide a method for preventing wrong tightening of a tightening device, a tightening device, and an assembly device, aiming to timely detect incorrect operations during tightening, thereby improving the quality of the operation.

[0005] To achieve the above object, the present invention provides a method for preventing wrong tightening of a tightening device, wherein the tightening device comprises a tightening gun and a sleeve detachably mounted on a rotating portion of the tightening gun, wherein the sleeve is used to be sleeved with a head of a screw-connected member, and the method for preventing wrong tightening of the tightening device comprises the following steps:

[0006] When the tightening device is working, obtaining real-time working parameters of the tightening gun, wherein the real-time working parameters include real-time torque and corresponding real-time rotation stroke parameters;

[0007] Matching the real-time working parameters with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters;

[0008] When the matching is unsuccessful, it is determined that the tightening gun is malfunctioning.

[0009] In one embodiment, the step of matching the real-time operating parameters with theoretical operating parameters corresponding to the current screw connection comprises:

[0010] The real-time working parameters are matched with the theoretical working curve of the current screw connection when tightening, and the theoretical working curve is a corresponding relationship curve between theoretical torque and theoretical rotation stroke parameters.

[0011] In one embodiment, when the tightening device is working, the step of obtaining the real-time working parameters of the tightening gun, wherein the real-time working parameters include the real-time torque and the corresponding real-time rotation stroke parameters, comprises:

[0012] When the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained.

[0013] In one embodiment, when the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connector during tightening, the real-time working parameter of the tightening gun is obtained, including:

[0014] The ratio of the initial torque parameter of the current threaded connection when being tightened to the target torque parameter of the current threaded connection when being tightened is between 20% and 80%.

[0015] In one embodiment, the initial torque parameter of the current threaded connection when tightening accounts for 20%-80% of the target torque parameter of the current threaded connection when tightening, including:

[0016] Get the current connection strength of the screw connection;

[0017] If it is a soft connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 60%-80%;

[0018] If it is a neutral connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 40%-60%; and,

[0019] If it is a hard connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 20%-40%.

[0020] In one embodiment, the real-time working parameters are matched with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters, including:

[0021] A deviation value is obtained by comparing the real-time working parameter with a theoretical working parameter corresponding to the current screw connection, and the deviation value is matched with an allowable error value.

[0022] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes:

[0023] After determining that the tightening gun is malfunctioning, the tightening gun stops working; and / or,

[0024] After determining that the tightening gun is malfunctioning, an alarm is issued; and / or,

[0025] After determining that the tightening gun is malfunctioning, it vibrates; and / or,

[0026] After determining that the tightening gun is malfunctioning, light is emitted.

[0027] The present invention also provides a tightening device, comprising:

[0028] Tighten the gun;

[0029] A sleeve is detachably mounted on the rotating part of the tightening gun, and the sleeve is used to be sleeved with the head of the screw-on component; and

[0030] A control device electrically connected to the tightening gun;

[0031] The control device includes a memory, a processor, and a control program of the tightening device stored in the memory and executable on the processor. The control program of the tightening device is configured to implement the steps of the method for preventing wrong tightening of the tightening device.

[0032] In one embodiment, the sleeve is provided in plurality, and the plurality of sleeves at least comprises:

[0033] A first sleeve, comprising a first mounting portion and a first working portion connected to each other, wherein the first mounting portion is detachably mounted on the rotating portion of the tightening gun, and the first working portion is configured to be sleeved on the head of the first screw-connector; and

[0034] The second sleeve comprises a second mounting portion and a second working portion connected to each other, wherein the second mounting portion

[0035] The second working part is detachably mounted on the first working part and is configured to be sleeved on the head of the second screw connector; wherein,

[0036] The head of the first screw connection member and the head of the second screw connection member are arranged differently.

[0037] The present invention also provides an assembly device, comprising the tightening device.

[0038] The technical solution of the present invention realizes precise control of the tightening process by real-time monitoring and comparison of the working parameters of the tightening gun and the theoretical parameters, which not only improves the tightening accuracy and assembly quality, but also reduces the failure rate and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0040] Figure 1 A schematic flow chart of an embodiment of a method for preventing wrong tightening of a tightening device provided by the present invention;

[0041] Figure 2 A schematic diagram of the hardware operating environment of the control device;

[0042] Description of Figure Numbers:

[0043] Processor 1001 , communication bus 1002 , user interface 1003 , network interface 1004 , memory 1005 .

[0044] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The rear subframe stabilizer bar and stabilizer bar joint are important components of the automobile chassis. They are defined as key tightening items and need to be tightened with servo tools. The rear stabilizer bar and stabilizer bar joint of each vehicle model are tightened at the same position. The opposite side distance and torque of the stabilizer bar and stabilizer bar joint bolts of each vehicle model are different. Two different servo tools are required on one side and four servo tools are required on both sides to tighten. In addition to tightening the stabilizer bar and stabilizer bar joint, the current position also needs to tighten key parts such as the rear motor suspension. The current tightening requires switching tools back and forth, which adds too much non-value-added time and affects work efficiency.

[0049] To this end, in the prior art, different socket selectors are switched on the same servo tool, and the torque needs to be modified and switched at the same time. In this process, it is easy to only modify the socket to adapt to the mating distance without adapting and adjusting the torque, resulting in misoperation and reduced work quality.

[0050] The present invention provides a tightening device, including a tightening gun, a sleeve, a control device,

[0051] A sleeve is detachably mounted on the rotating part of the tightening gun, and the sleeve is used to be sleeved with the head of the screw-on component; and

[0052] A control device electrically connected to the tightening gun;

[0053] Wherein, the control device includes a memory, a processor, and a control program of the tightening device stored in the memory and executable on the processor, and the control program of the tightening device is configured to implement the steps of the method for preventing wrong tightening of the tightening device, such as Figure 1 As shown, the following steps are included:

[0054] Step S100, when the tightening device is working, obtaining real-time working parameters of the tightening gun, wherein the real-time working parameters include real-time torque and corresponding real-time rotation stroke parameters;

[0055] Step S200, matching the real-time working parameters with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters;

[0056] Step S300: When the matching is unsuccessful, it is determined that the tightening gun is malfunctioning.

[0057] In one embodiment, the step of matching the real-time operating parameters with theoretical operating parameters corresponding to the current screw connection comprises:

[0058] The real-time working parameters are matched with the theoretical working curve of the current screw connection when tightening, and the theoretical working curve is a corresponding relationship curve between theoretical torque and theoretical rotation stroke parameters.

[0059] In one embodiment, when the tightening device is working, the step of obtaining the real-time working parameters of the tightening gun, wherein the real-time working parameters include the real-time torque and the corresponding real-time rotation stroke parameters, comprises:

[0060] When the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained.

[0061] In one embodiment, when the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connector during tightening, the real-time working parameter of the tightening gun is obtained, including:

[0062] The ratio of the initial torque parameter of the current threaded connection when being tightened to the target torque parameter of the current threaded connection when being tightened is between 20% and 80%.

[0063] In one embodiment, the initial torque parameter of the current threaded connection when tightening accounts for 20%-80% of the target torque parameter of the current threaded connection when tightening, including:

[0064] Get the current connection strength of the screw connection;

[0065] If it is a soft connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 60%-80%;

[0066] If it is a neutral connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 40%-60%; and,

[0067] If it is a hard connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 20%-40%.

[0068] In one embodiment, the real-time working parameters are matched with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters, including:

[0069] A deviation value is obtained by comparing the real-time working parameter with a theoretical working parameter corresponding to the current screw connection, and the deviation value is matched with an allowable error value.

[0070] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes:

[0071] After determining that the tightening gun is malfunctioning, the tightening gun stops working; and / or,

[0072] After determining that the tightening gun is malfunctioning, an alarm is issued; and / or,

[0073] After determining that the tightening gun is malfunctioning, it vibrates; and / or,

[0074] After determining that the tightening gun is malfunctioning, light is emitted.

[0075] like Figure 2 As shown, the control device of the tightening device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIrele-FIdelity, WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0076] Those skilled in the art will understand that Figure 2 The structure shown in the figure does not constitute a limitation on the control device of the tightening device, and may include more or less components than those shown in the figure, or combine certain components, or arrange the components differently.

[0077] In one embodiment, the sleeve is provided in plurality, and the plurality of sleeves at least comprises:

[0078] A first sleeve, comprising a first mounting portion and a first working portion connected to each other, wherein the first mounting portion is detachably mounted on the rotating portion of the tightening gun, and the first working portion is configured to be sleeved on the head of the first screw-connector; and

[0079] The second sleeve comprises a second mounting portion and a second working portion connected to each other, wherein the second mounting portion

[0080] The second working part is detachably mounted on the first working part and is configured to be sleeved on the head of the second screw-connector; wherein the head of the first screw-connector and the head of the second screw-connector are configured differently.

[0081] In this way, the head of the first screw connector is of a different type from the head of the second screw connector, and the first working portion can be adapted to the head of the first screw connector, so that the head of the screw connector can be stably covered during operation, thereby effectively applying a rotational force. The second mounting portion can be detachably connected to the first working portion of the first sleeve, rather than being directly connected to the tightening gun. The second sleeve can be used as an accessory or extension of the first sleeve, providing additional functionality or flexibility. The second working portion matches the head of the second screw connector. At the same time, the detachable connection method is conducive to quick replacement.

[0082] It is understandable that the detachable connection method can be set to a snap connection, a threaded connection, and a magnetic connection, which will not be elaborated here.

[0083] The present invention also proposes an assembly device, which includes: the specific structure of the tightening device refers to the above embodiment; since the assembly device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0084] The present invention also provides a method for preventing wrong tightening of a tightening device, comprising the following steps:

[0085] Step S100, when the tightening device is working, obtaining real-time working parameters of the tightening gun, wherein the real-time working parameters include real-time torque and corresponding real-time rotation stroke parameters;

[0086] Step S200, matching the real-time working parameters with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters;

[0087] Step S300: When the matching is unsuccessful, it is determined that the tightening gun is malfunctioning.

[0088] The technical solution of the present invention realizes precise control of the tightening process by real-time monitoring and comparison of the working parameters of the tightening gun and the theoretical parameters, which not only improves the tightening accuracy and assembly quality, but also reduces the failure rate and maintenance cost.

[0089] It is understandable that the theoretical parameters can be obtained by testing the real-time parameters multiple times in advance and fitting the multiple real-time parameters.

[0090] In one embodiment, the step of matching the real-time operating parameters with theoretical operating parameters corresponding to the current screw connection comprises:

[0091] The real-time working parameters are matched with the theoretical working curve of the current screw connection when tightening, and the theoretical working curve is a corresponding relationship curve between theoretical torque and theoretical rotation stroke parameters.

[0092] With such a configuration, during the tightening process, the torque and rotational stroke data of the tightening gun are collected in real time through sensors or other monitoring devices. These data constitute real-time working parameters. According to the specifications, materials and application scenarios of the current screw-connected parts, the relationship between the torque and the rotational stroke under the ideal state is determined in advance through experiments or calculations to form a theoretical working curve. This curve describes how the torque changes with the change of the rotational stroke during the entire process from the beginning of tightening to the final reaching of the predetermined torque value. The torque and rotational stroke data points collected in real time are mapped to the theoretical working curve, or these data points are compared with the theoretical working curve. This can more comprehensively and accurately reflect the changes in torque and rotational stroke during the tightening process, thereby improving the work quality of the tightening operation.

[0093] In one embodiment, when the tightening device is working, the step of obtaining the real-time working parameters of the tightening gun, wherein the real-time working parameters include the real-time torque and the corresponding real-time rotation stroke parameters, comprises:

[0094] When the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained.

[0095] In this way, when the real-time torque value monitored reaches or exceeds the preset initial torque parameter, the data acquisition system is triggered to start recording detailed real-time working parameters. This step allows data to be collected and analyzed only after the screw connection actually enters the effective tightening stage, thus avoiding interference from invalid data.

[0096] Specifically, in one embodiment, when the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained, including:

[0097] The ratio of the initial torque parameter of the current threaded connection when being tightened to the target torque parameter of the current threaded connection when being tightened is between 20% and 80%.

[0098] With this setting, the collected data is more concentrated in the effective tightening stage, which is conducive to subsequent data analysis.

[0099] In one embodiment, the initial torque parameter of the current threaded connection when tightening accounts for 20%-80% of the target torque parameter of the current threaded connection when tightening, including:

[0100] Get the current connection strength of the screw connection;

[0101] If it is a soft connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 60%-80%;

[0102] If it is a neutral connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 40%-60%; and,

[0103] If it is a hard connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 20%-40%.

[0104] In this way, since the soft connection has high requirements for precise control during the tightening process, the ratio of the initial torque parameter to the target torque parameter is relatively high, usually between 60%-80%. This means that during the tightening process, when the real-time torque reaches 60%-80% of the target torque, the real-time working parameters begin to be recorded. The tightening process of the neutral connection is relatively moderate, so the ratio of the initial torque parameter to the target torque parameter is between 40%-60%. This ratio can make the tightening process more stable and reliable. Since the hard connection requires a higher clamping force and load bearing capacity, the ratio of the initial torque parameter to the target torque parameter is relatively low, usually between 20%-40%. This means that during the tightening process, the system will start recording the real-time working parameters when the real-time torque reaches a lower proportion of the target torque to ensure the adequacy and completeness of the tightening process.

[0105] In summary, by introducing the concept of connection strength and setting a reasonable ratio of the initial torque parameter to the target torque parameter according to different connection forms, this embodiment can more accurately control the tightening process and improve the accuracy and reliability of tightening.

[0106] In one embodiment, the real-time working parameters are matched with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters, including:

[0107] A deviation value is obtained by comparing the real-time working parameter with a theoretical working parameter corresponding to the current screw connection, and the deviation value is matched with an allowable error value.

[0108] With this setting, the real-time working parameters are compared with the theoretical working parameters corresponding to the current screw connection to obtain the deviation value. The deviation value refers to the degree of difference between the real-time working parameters and the theoretical working parameters. It is a threshold value that can be pre-set according to factors such as the application scenario and connection requirements of the screw connection to determine whether the difference between the real-time working parameters and the theoretical working parameters is within an acceptable range. The calculated deviation value is compared with the allowable error value. If the deviation value is within the allowable error value range, it is considered that the tightening process of the screw connection meets the design requirements and is acceptable; if the deviation value exceeds the allowable error value range, it is considered that there is a problem with the tightening process of the screw connection, and it is determined that the tightening gun is malfunctioning.

[0109] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes:

[0110] After determining that the tightening gun is working incorrectly, the tightening gun stops working.

[0111] It is understandable that by stopping the tightening gun from working, damage to the screwed parts, degradation of assembly quality or safety hazards caused by incorrect tightening can be prevented, so that the tightening operation will not continue before the problem is solved.

[0112] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes: after determining that the tightening gun is malfunctioning, issuing an alarm.

[0113] It is understandable that the operator can be reminded of the erroneous operation of the tightening gun by sounding an alarm, which is helpful for the operator to know that the tightening gun is erroneous.

[0114] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes:

[0115] After determining that the tightening gun is erroneously working, vibration is emitted.

[0116] It is understandable that the vibration signal can be directly transmitted to the operator's hand or body, so that the operator can immediately perceive the problem in the tightening process. This vibration reminder method is intuitive and rapid, which is conducive to letting the operator know that the tightening gun is working incorrectly.

[0117] In one embodiment, when the matching is unsuccessful, determining that the tightening gun is malfunctioning includes:

[0118] After determining that the tightening gun is malfunctioning, light is emitted.

[0119] It is understandable that a specific color of light (such as red) is emitted by an LED lamp or other light source to attract the attention of the operator. This light reminder method is particularly effective in a dim or noisy environment, which helps the operator to know that the tightening gun is working incorrectly.

[0120] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for preventing wrong tightening of a tightening device, characterized in that: The tightening device comprises a tightening gun and a sleeve detachably mounted on a rotating part of the tightening gun, wherein the sleeve is used to be sleeved with a head of a screw-connecting member. The method for preventing wrong tightening of the tightening device comprises the following steps: When the tightening device is working, obtaining real-time working parameters of the tightening gun, wherein the real-time working parameters include real-time torque and corresponding real-time rotation stroke parameters; Matching the real-time working parameters with theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters; When the matching is unsuccessful, it is determined that the tightening gun is malfunctioning.

2. The method for preventing wrong tightening of a tightening device according to claim 1, characterized in that: The step of matching the real-time working parameters with the theoretical working parameters corresponding to the current screw connection comprises: The real-time working parameters are matched with the theoretical working curve of the current screw connection when tightening, and the theoretical working curve is a corresponding relationship curve between theoretical torque and theoretical rotation stroke parameters.

3. The method for preventing wrong tightening of a tightening device according to claim 1 or 2, characterized in that: When the tightening device is working, the step of obtaining the real-time working parameters of the tightening gun, wherein the real-time working parameters include the real-time torque and the corresponding real-time rotation stroke parameters, comprises: When the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained.

4. The method for preventing wrong tightening of a tightening device according to claim 3, characterized in that: When the real-time torque parameter of the tightening gun reaches the initial torque parameter of the current screw-connected part during tightening, the real-time working parameter of the tightening gun is obtained, including: The ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 20%-80%; and / or, The initial torque parameters of the plurality of screw connections are set to a consistent value.

5. The method for preventing wrong tightening of a tightening device according to claim 4, characterized in that: The initial torque parameter of the current threaded connection when tightening accounts for 20%-80% of the target torque parameter of the current threaded connection when tightening, including: Get the current connection strength of the screw connection; If it is a soft connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 60%-80%; If it is a neutral connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 40%-60%; and, If it is a hard connection, the ratio of the initial torque parameter of the current screw connection when tightening to the target torque parameter of the current screw connection when tightening is 20%-40%.

6. The method for preventing wrong tightening of a tightening device according to claim 1 or 2, characterized in that: The real-time working parameters are matched with the theoretical working parameters corresponding to the current screw connection, wherein the theoretical working parameters include theoretical torque and corresponding theoretical rotation stroke parameters, including: A deviation value is obtained by comparing the real-time working parameter with a theoretical working parameter corresponding to the current screw connection, and the deviation value is matched with an allowable error value.

7. The method for preventing wrong tightening of a tightening device according to claim 1 or 2, characterized in that: When the matching is unsuccessful, it is determined that the tightening gun is malfunctioning, including: After determining that the tightening gun is malfunctioning, the tightening gun stops working; and / or, After determining that the tightening gun is malfunctioning, an alarm is issued; and / or, After determining that the tightening gun is malfunctioning, it vibrates; and / or, After determining that the tightening gun is malfunctioning, light is emitted.

8. A tightening device, characterized in that: include: Tighten the gun; A sleeve is detachably mounted on the rotating part of the tightening gun, and the sleeve is used to be sleeved with the head of the screw-connecting member; as well as, A control device electrically connected to the tightening gun; Wherein, the control device includes a memory, a processor and a control program of the tightening device stored in the memory and executable on the processor, and the control program of the tightening device is configured to implement the steps of the method for preventing wrong tightening of the tightening device as described in any one of claims 1 to 7.

9. The tightening device according to claim 8, characterized in that: The sleeve is provided with a plurality of sleeves, and the plurality of sleeves at least include: A first sleeve, comprising a first mounting portion and a first working portion connected to each other, wherein the first mounting portion is detachably mounted on the rotating portion of the tightening gun, and the first working portion is configured to be sleeved on the head of the first screw-connector; and The second sleeve comprises a second mounting portion and a second working portion which are connected to each other, wherein the second mounting portion is detachably mounted on the first working portion and the second working portion is configured to be sleeved on the head of the second screw-connector; wherein, The head of the first screw connection member and the head of the second screw connection member are arranged differently.

10. An assembly device, characterized in that: Comprising a tightening device as claimed in any one of claims 8 and 9.

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