An electric screwdriver and torque adjustment method based on MES system production

Abstract

The present invention discloses an electric screwdriver and a torque adjustment method thereof based on MES system production. The electric screwdriver comprises a reduction mechanism body, a torque adjustment sleeve, a torque adjustment ring protective sleeve, a torque adjustment ring, an annular force sensor, a torsion spring, a torque push plate, a pressure spring, and a pressure transmission ring. The inner wall of the torque adjustment ring is threadedly connected to the reduction mechanism body, the inner wall of the torque adjustment sleeve is threadedly connected to the outer wall of the torque adjustment ring, the front end of the torque adjustment sleeve is threadedly connected to the reduction mechanism body, the torsion spring is sleeved with the transmission main shaft of the reduction mechanism body, the torque push plate is disposed within the reduction mechanism body, the annular force sensor and the pressure transmission ring are respectively sleeved with the transmission main shaft of the reduction mechanism body, and a plurality of pressure springs are provided. The invention realizes real-time visualization of the torque value that cannot be visualized through the adjustment conversion device between the torque value and the pressure value, fundamentally solving the problems and losses caused by the loss of torque value adjustment or identification in traditional electric screwdrivers.

Description

Technical Field

[0001] The present invention relates to the field of electric screwdrivers, and in particular to an electric screwdriver produced based on an MES system and a torque adjustment method thereof. Background Art

[0002] An electric screwdriver, also known as an electric screwdriver or electric driver, is a power tool used to tighten and loosen screws. Equipped with a mechanism for adjusting and limiting torque, it's primarily used on assembly lines and is a must-have tool for most manufacturing companies.

[0003] Traditional production processes, such as server assembly, involve production requirements at multiple, even dozens, of torque values. To mitigate costs and enhance operational convenience, companies typically equip one or a small number of torque-adjustable electric screwdrivers with multiple torque values. These screwdrivers are then adjusted and calibrated based on the torque required for production. However, traditional torque-adjustable electric screwdrivers currently on the market lack precise visual feedback and require specialized calibration instruments, such as the KTM-150 torque tester, to be adjusted by professional engineers.

[0004] As for the Inspur server production line and CELL single-person installation line in Gui'an Factory, there are as many as 124 electric screwdrivers. According to the production process requirements, each screwdriver needs to be torque adjusted and calibrated before the start of work every day. It takes 40 seconds to adjust each screwdriver, and it takes 1.37 hours to adjust all the screwdrivers. The adjustment process is time-consuming and labor-intensive. Due to changes in production orders and models, the entire line or CELL single-person installation station needs to be adjusted from time to time every day. Taking the Inspur Gui'an Factory as an example, the number of batch adjustments is no less than 5 times a day.

[0005] Torque calibration and data storage are all manual operations, stored in paper files, as shown below. Over 100 screwdrivers require daily torque calibration and inspection records, and approximately 90 sheets of paper data must be scanned and stored quarterly, which is time-consuming and labor-intensive. Furthermore, daily torque data cannot be linked to product data in the production system, nor does it provide torque calibration information for the current workstation. Torque values ​​for electric screwdrivers are not traceable. Therefore, any torque production issues will inevitably lead to mass production problems, and torque values ​​cannot be controlled immediately at the current workstation as a key production factor.

[0006] Torque inspection record of electric screwdrivers in the production department

[0007]

[0008] Traditional adjustable electric screwdrivers currently on the market generally identify the torque of the current workstation by hanging a torque identification plate after torque adjustment. However, there are also considerable risks. Because the screwdriver has no real-time visual output of torque and only relies on paper torque identification plates for identification, once the screwdriver misses the torque calibration and the operator only identifies it by the existing label, it is very likely to cause the torque to be too small, resulting in loose locking, or the torque to be too large, damaging the parts, causing customer complaints and damaged parts, causing unnecessary losses to the company and a decline in product quality reputation. Summary of the Invention

[0009] The purpose of the present invention is to provide an electric screwdriver and a torque adjustment method thereof produced based on an MES system, which realizes real-time visualization of the non-visualizable torque value through an adjustment conversion device between the torque value and the pressure value, and fundamentally solves the problems and losses caused by the loss of torque value adjustment or identification in traditional electric screwdrivers.

[0010] The technical solution adopted by the present invention to solve its technical problems is: an electric screwdriver produced based on an MES system, comprising a reduction mechanism main body, a torque adjustment sleeve, a torque adjustment ring protective sleeve, a torque adjustment ring, an annular structure force sensor, a torsion spring, a torsion push plate, a pressure spring and a pressure transmission ring, the inner wall of the torque adjustment ring is threadedly connected to the reduction mechanism main body, the torque adjustment sleeve is threadedly connected to the inner wall and the outer wall of the torque adjustment ring, the front end of the torque adjustment sleeve is connected to the reduction mechanism main body through a thread, the torsion spring is sleeved with the transmission main shaft of the reduction mechanism main body, the front end of the torsion spring contacts the inner end surface of the torsion adjustment ring, and the rear end of the torsion spring contacts the torsion push plate, the torsion push plate is arranged inside the reduction mechanism main body, the annular structure force sensor and the pressure transmission ring are respectively sleeved with the transmission main shaft of the reduction mechanism main body, and a plurality of pressure springs are provided, one end of each pressure spring is connected to the pressure transmission ring, and the other end contacts the annular structure force sensor.

[0011] Furthermore, a groove is provided in one end surface of the torque adjustment ring, and an outer circumferential surface of the torque adjustment ring is provided with an external thread that cooperates with the torque adjustment sleeve.

[0012] Furthermore, one end of the pressure transmission ring contacts the groove on the end surface of the torsion adjustment ring, and the other end of the pressure transmission ring is provided with a plurality of guide columns for installing pressure springs.

[0013] Furthermore, a signal line 2 is provided on the side wall of the annular structure force sensor, a signal line 1 is provided inside the deceleration mechanism body, the signal line 2 is connected to one end of the signal line 1, and the other end of the signal line 1 is connected to the interface of the force control instrument.

[0014] Furthermore, the main body of the deceleration mechanism includes a reducer, a signal line 1, a card slot 1, a torque transmission spindle, an electric screwdriver head and a wire slot cover. One end of the torque transmission spindle is connected to the reducer, and the other end of the torque transmission spindle is connected to the electric screwdriver head. A card slot 1 is provided on the top of one end of the reducer, and the card slot 1 slides with the wire slot cover. The signal line 1 is provided inside the reducer, and one end of the signal line 1 extends to the outside of the reducer through the wire hole on the bottom wall of the card slot 1, and the other end of the signal line 1 extends to the outside of the reducer through the rear end of the reducer.

[0015] Furthermore, a plurality of balls are provided in a groove at one end of the pressure transmission ring that cooperates with the torque adjustment ring.

[0016] Furthermore, a torque adjustment ring protection sleeve is provided at the end of the torque adjustment sleeve.

[0017] A torque adjustment method for an electric screwdriver produced based on an MES system includes the following steps:

[0018] The MES integrated machine is turned on, the operator information is logged in, and the product from the previous workstation flows in;

[0019] Scan the barcode gun to enter the installation parts information;

[0020] The MES terminal displays the required torque value and the actual torque value of the current electric screwdriver. Check whether the torque value of the electric screwdriver currently assembling the component meets the torque value required by the component process. If the torque value of the electric screwdriver currently assembling the component meets the standard, it will be prompted as qualified and assembly can continue.

[0021] If the torque value does not meet the standard, an alarm will be issued, and the operator will rotate the torque adjustment ring to adjust the torque value through the clutch device and deceleration device of the electric screwdriver. At the same time, the rotating torque adjustment ring cooperates with the ball and pressure transmission ring to apply the axial thrust generated by the rotation to the sensing end face of the annular structure force sensor through the pressure spring. Then, the force measurement control instrument and the MES system interact in real time, and the torque value during adjustment is displayed in the real-time torque value dialog box of the current workstation until the torque value is within the allowable error range of the torque value required by the current workstation process. The current torque value is prompted to meet the requirements, and a torque value OK prompt tone is issued. The assembly is completed and the system is discharged from the current workstation.

[0022] Furthermore, each time a work order is changed, the adjusted torque value can be recorded in real time in the MES system database. The MES system data capture function can be used to export and archive the inspection and calibration data and time of the electric screwdriver.

[0023] Beneficial effects of the present invention:

[0024] The present invention makes the torque value of the electric screwdriver visible and audible in servers and other similar assembly line products. During the operation, the current process torque value is clearly fed back and required. The system freezes the torque value error, and the torque value is prevented from being mistaken. This fundamentally solves the customer complaints and damaged parts caused by torque value discrepancies due to personnel omissions, reduces unnecessary losses to the enterprise and reduces adverse effects such as a decline in product quality reputation.

[0025] In terms of the operation process, the present invention can eliminate the tedious work process of professional adjustment personnel and special adjustment measuring instruments invested in the early stage, and can also adjust the torque adjustment time at the beginning of each shift and when changing models in the middle of the shift. Calculated as 124 torques adjusted five times a day, it can save about 2.5 hours a day.

[0026] The present invention can record the actual torque value during production in real time and store it in the MES database with the product information, facilitating traceability of the production process. Each time a work order is changed, the adjusted torque value is recorded in real time in the MES database. The MES system's data capture function can be used to export and archive the inspection and calibration data and time of the electric screwdriver. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a diagram showing the overall structure of the electric screwdriver of the present invention;

[0028] Figure 2 for Figure 1 Exploded installation structure drawing;

[0029] Figure 3 This is the installation structure diagram of the pressure spring and pressure transmission;

[0030] Figure 4 This is the axonometric view of the torque adjustment sleeve;

[0031] Figure 5 This is the axonometric drawing of the reduction mechanism body;

[0032] Figure 6 A system diagram of the torque adjustment device and method of the present invention;

[0033] Figure 7 The figure is a flow chart of the method of using the present invention.

[0034] In the picture:

[0035] 1. Reduction mechanism body, 11. Reducer, 12. Signal line 1, 13. Card slot 1, 14. Torque transmission spindle, 15. Electric screwdriver head, 16. Card slot cover, 2. Torque adjustment sleeve, 21. Sleeve body, 22. Card slot 2, 3. Torque adjustment ring protective sleeve, 4. Torque adjustment ring, 5. Ring-shaped force sensor, 51. Signal line 2, 6. Torsion spring, 7. Torsion push plate, 8. Pressure spring, 9. Pressure transmission ring, 10. Ball bearing. DETAILED DESCRIPTION

[0036] With reference to the accompanying drawings, the following detailed description is made of an electric screwdriver and a torque adjustment method thereof produced based on an MES system of the present invention.

[0037] In current production environments, the assembly process for servers and other electronic products requires specific torque values ​​for tightening various screws. This ensures that tightening is performed within a standardized torque value without damaging the components due to excessive torque. Too little torque can lead to loose tightening and product quality issues.

[0038] like Figures 1 to 5 As shown, an electric screwdriver produced based on the MES system of the present invention includes a reduction mechanism body 1, a torque adjustment sleeve 2, a torque adjustment ring protective sleeve 3, a torque adjustment ring 4, an annular structure force sensor 5, a torsion spring 6, a torsion push plate 7, a pressure spring 8 and a pressure transmission ring 9, wherein the inner wall of the torque adjustment ring 4 is threadedly connected to the reduction mechanism body 1, the inner wall of the torque adjustment sleeve 2 is threadedly connected to the outer wall of the torque adjustment ring 4, the front end of the torque adjustment sleeve 2 is connected to the reduction mechanism body 1 through a thread, the torsion spring 6 is sleeved with the transmission main shaft of the reduction mechanism body 1, the front end of the torsion spring 6 contacts the inner end surface of the torque adjustment ring 4, and the rear end of the torsion spring 6 contacts the torsion push plate 7, the torsion push plate 7 is arranged inside the reduction mechanism body 1, the annular structure force sensor 5 and the pressure transmission ring 9 are respectively sleeved with the torque transmission main shaft 14 of the reduction mechanism body 1, and a plurality of pressure springs are provided, one end of each pressure spring 8 is connected to the pressure transmission ring 9, and the other end is in contact with the annular structure force sensor 5. The torque push plate 7 and the clutch device and speed reduction mechanism inside the speed reduction mechanism body 1 are well-known technologies and will not be elaborated on in detail. When adjusting the required torque, the torque adjustment ring is rotated clockwise or counterclockwise. The internal and external threads of the torque adjustment ring cooperate with the external threads of the torque transmission main shaft and the internal threads of the torque adjustment sleeve to convert the rotational force of the torque adjustment ring into axial displacement. The displacement generated by the inner end face of the torque adjustment ring compresses or relaxes the front end of the torsion spring, thereby transmitting the pressure of the torsion spring to the torque push plate.

[0039] The torque adjustment ring 4 is machined with a groove in its front section for cooperating with 12 evenly distributed balls. Grease is added to the groove. One side of the pressure transmission ring 9 contacts and cooperates with the balls and the torque adjustment ring ball grooves to perform point contact motion. A pressure spring guide column is machined on the other side of the pressure transmission ring 9. 12 pressure springs are evenly distributed on the guide column, and one side of the pressure spring ring directly contacts the pressure sensing end face of the annular structure force sensor.

[0040] The side wall of the annular structure force sensor 5 is provided with a signal line 2 51, and the interior of the deceleration mechanism body is provided with a signal line 12. The signal line 2 51 is connected to one end of the signal line 12, and the other end of the signal line 12 is connected to the interface of the force control instrument. Because the annular structure force sensor is a resistance strain type pressure sensor, when subjected to axial compression or relaxation of the pressure spring, the elastic body strain gauge attached to the force end face of the annular structure force sensor 5 will deform and cause resistance change. The resistance change causes the formed Wheatstone bridge to lose balance and output an electrical signal that changes linearly in proportion to the axial pressure. The electrical signal is transmitted through the signal line 2 and Figure 3 The signal line 1 in the torque measuring instrument is connected to the signal line 2, and the signal line 3 is connected to the interface of the force measuring control instrument to convert the electrical signal into a digital communication signal, perform multi-point calibration, and perform linear correction. It is connected to the MES system terminal equipment through the interface protocol, and the axial pressure during torque adjustment is analyzed and communicated with the MES system in the form of a digital signal.

[0041] The main body of the deceleration mechanism includes a reducer 11, a signal line 12, a card slot 13, a torque transmission main shaft 14, an electric screwdriver head 15 and a wire slot cover 16. One end of the torque transmission main shaft 14 is connected to the reducer 11, and the other end of the torque transmission main shaft 14 is connected to the electric screwdriver head 15. A card slot 13 is provided on the top of one end of the reducer 11, and the card slot 13 slides with the wire slot cover 16. The signal line 12 is arranged inside the reducer 11, and one end of the signal line 12 passes through the wire hole on the bottom wall of the card slot 13 and extends to the outside of the reducer 11. The other end of the signal line 12 passes through the rear end of the reducer and extends to the outside of the reducer 11.

[0042] The torque adjustment ring protective sleeve 3 is processed with threads on the inner wall, which cooperate with the threads processed on the outer wall of the end of the torque adjustment sleeve 2. After the torque adjustment ring is rotated and adjusted to the required torque value, it is fastened to the end of the torque adjustment sleeve through thread cooperation, thereby preventing the torque from being out of standard due to people accidentally touching the torque adjustment ring.

[0043] The MES system is an execution system for factory manufacturing. In the present invention, the main purpose is to convert the quantified pressure value into the corresponding torque value through a calibrated calculation formula using force-measuring instruments, and then feed it back to the MES terminal all-in-one at the current workstation. The torque value is then checked against the SOP requirements in the production process, thereby achieving visual adjustment and correction of the torque.

[0044] The axial pressure generated by adjusting the torque is connected to the electrical signal of the force control instrument interface through the resistance strain of the annular structure force sensor, and the electrical signal is converted into a digital communication signal. Multi-point calibration is performed, and linear correction is performed. The interface protocol is used to connect to the MES system terminal equipment, and the axial pressure during torque adjustment is analyzed and communicated with the MES system in the form of a digital signal.

[0045] The force measurement control instrument converts the force measurement signal into a digital communication signal and a standard analog output signal. The digital communication interface can be selected as RS485 or RS232; it realizes the data exchange function between the force measurement control instrument and the MES system.

[0046] The hardware layer protocol determines how data is transmitted. For example, the force control instrument sends a pressure of F=0.1N to the MES system. The binary number of 0.1 is 0.000110011. These 10 binary numbers are transmitted from the force control instrument to the MES system.

[0047] Common hardware-layer protocols currently include RS-232, RS-485, SPI, and IIC. For example, RS-232 stipulates that a voltage of x volts on a line represents a 0, while a voltage of y volts represents a 1. Furthermore, hardware-layer protocol constraints include the number of lines used for data transmission and the material of the lines used for input transmission. In the MES system, standard communication protocols can be used to obtain and interpret the actual pressure value F = 0.1N represented by the binary number 0.000110011 on the force control instrument.

[0048] The formula is also known: Torque = Torque * Thread Diameter, and Pressure = 3.14 * Torque / Pitch, which can be converted to Torque = (Pressure * Pitch) / (3.14 * Thread Diameter). In this formula, the pressure is transmitted to the MES system via the annular structure force sensor 5 through the force measurement control instrument, while the screw pitch and thread diameter are both fixed values. In other words, by establishing a linear relationship between the pressure and the corresponding torque value in the MES system database, Torque Y = K (linear value) X (pressure value) + B (constant value when pressure is 0); substituting the two sets of formulas, a linear relationship ratio can be obtained. Real-time torque value feedback is performed through the MES system and displayed on the operation screen of the MES system terminal all-in-one machine, thereby achieving real-time visualization of the non-visualized torque value through the adjustment and conversion device between the torque value and the pressure value of the present invention, fundamentally solving the problems and losses caused by torque value adjustment or identification loss in traditional electric screws.

[0049] Taking the server motherboard and CPU radiator installation station as an example to illustrate the method, the production process requirements of various production models are maintained in the MES system in advance in the form of work order information. When the assembled products of the previous process flow into the current station, the motherboard and CPU radiator installation station, the operator conducts human-computer interaction through the MES all-in-one panel, and can be prompted to install the CPU and radiator in the MES terminal of the current station. After the operator enters the radiator barcode information into the MES system with a barcode scanner, the current radiator locking required torque value dialog box 1 shows 13.6Kgf.cm, while the other current station radiator The real-time torque value dialog box 2 of the electric screwdriver (1#) attached to the device lock is displayed as 9Kgf.cm. The previous work order requires a torque value. The torque values ​​in the torque value dialog boxes 1 and 2 are different. The torque value displayed in the real-time torque value dialog box 2 is red, and it is accompanied by a prompt that the current torque value is out of standard and inconsistent, and an alarm sound is issued to indicate that the torque value does not match. At this time, if the operator ignores the torque value alarm and continues to assemble, the alarm sound will not stop automatically, and the next assembly process cannot be carried out until the operator adjusts to the qualified torque value. The police can be lifted and the operation process can proceed as usual, which serves to remind the operator to pay attention to the current torque value.

[0050] Torque is adjusted in real time, and the operator will Figure 2 The torque adjustment ring protective sleeve is removed, and then the torque adjustment ring 4 is rotated clockwise. The axial displacement pressure acts on the torque push plate 7 through the torsion spring 6, and then the torque value is increased from 9 kgf.cm to 13.6 kgf.cm through the clutch device and reduction device of the electric screwdriver. At the same time, the clockwise rotation of the torque adjustment ring 4 transmits the axial thrust generated by the rotation through the ball 10 and the pressure transmission ring 9, and acts on the sensing end face of the annular structure force sensor 5 through the pressure spring 8. Then, through the force measurement control instrument and the MES system, the torque value during adjustment is displayed in the real-time torque value dialog box of the radiator locking screwdriver at the current workstation. Until the increased torque value enters the torque value error allowable range of the current workstation process requirements, it is prompted that the current torque value meets the requirements, and a torque value OK prompt tone is emitted. Finally, the operator puts on the torque adjustment ring protective sleeve. At this point, the functions and processes described in the present invention are realized.

[0051] After the operator has completely locked the radiator, he scans the motherboard information with a barcode scanner and enters it. The previous radiator locking required torque value dialog box is then converted to the motherboard locking required torque value dialog box, and the value also synchronously displays the required torque value of 4Kgf.cm. The real-time torque value dialog box corresponding to another motherboard locking electric screwdriver (2#) displays 4Kgf.cm. The torque value required by the previous work order, the torque values ​​1 and 3 in the torque value dialog box are within the allowable torque value error range required by the process. The torque value displayed in the real-time torque value dialog box 3 is green, accompanied by a prompt sound indicating that the current torque value is qualified. The operator can then proceed with assembly. The MES system can record the actual torque value of the current product in real time during production, and store it in the MES database with the production product information for traceability of the product production process.

[0052] Each time a work order is changed, the adjusted torque value can be recorded in real time in the MES system database. The MES system data capture function can be used to export and archive the inspection and calibration data and time of the electric screwdriver.

[0053] The present invention can display several screwdriver torque values ​​on the human-computer interaction screen of the MES terminal after the information of the parts to be assembled is entered into the MES system by using a barcode scanner in the server and other similar assembly line products. These values ​​are respectively the torque value 1# required by the process of the parts in the current workstation, and the torque values ​​2# / 3# / ..... corresponding to all the electric screwdrivers 1# / 2# / ... in the current workstation. By comparing the torque value 2# of the electric screwdriver 1# currently assembling the part with the torque value 1# required by the process of the part, if they meet the standards, it will be prompted as qualified and assembly can continue. If the torque values ​​do not meet the standards, an alarm will be issued and assembly and production cannot continue. Usually, a work order only needs to be adjusted once until a new production work order requirement is encountered.

[0054] When the torque value does not match, it is necessary to design a torque adjustment device and method for an electric screwdriver based on MES system production through the present invention. The structure of the torque adjustment device is as follows: Figure 2As shown, the operator removes the torque adjustment ring protective cover 3, rotates the torque adjustment ring 4, and generates axial displacement pressure, which acts on the torque push plate 7 through the torsion spring. The torque value is then adjusted through the clutch device and reduction device of the electric screwdriver. At the same time, the rotating torque adjustment ring cooperates with the ball 10 and the pressure transmission ring 9 to apply the axial thrust generated by the rotation to the sensing end face of the annular structure force sensor 5 through the pressure spring. Then, through the force measurement control instrument and the MES system, real-time interaction is achieved, and the torque value during adjustment is displayed in the current workstation real-time torque value dialog box. Until the torque value is within the allowable error range of the torque value required by the current workstation process, it is prompted that the current torque value meets the requirements, and a torque value OK prompt tone is emitted. Finally, the torque adjustment ring protective cover is replaced to complete the torque value adjustment and calibration process.

[0055] In terms of the operation process, the present invention can eliminate the tedious work process of professional adjustment personnel and special adjustment measuring instruments invested in the early stage, and can also adjust the torque adjustment time at the beginning of each shift and when changing models in the middle of the shift. Calculated as 124 torques adjusted five times a day, it can save about 2.5 hours a day.

[0056] Torque values ​​no longer require traditional manual spot checks, which record the values ​​and scan them for archiving. This tedious and laborious process requires 30 scans per month and approximately 90 scans per quarter. This present invention can now record the actual torque values ​​of the current product during production in real time and store them in the MES database along with the product information for easy traceability of the production process. Each time a work order is changed, the adjusted torque values ​​are recorded in real time in the MES database. The MES system's data capture function allows the export and archiving of electric screwdriver spot check and calibration data and time.

[0057] The torque value of the electric screwdriver is made visible and audible. During the operation, the current process torque value is clearly fed back and required. The system freezes the torque value error and prevents the torque value from being mistaken. This fundamentally solves the problem of torque value discrepancies caused by personnel omissions, resulting in customer complaints and damaged parts, and reduces unnecessary losses to the company and adverse effects such as a decline in product quality reputation.

[0058] The above description is merely an illustration of some principles of the present invention. This specification is not intended to limit the present invention to the specific structure and application scope shown and described. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the present invention.

[0059] Except for the technical features described in the specification, the remaining technical features are known to those skilled in the art.

Claims

1. An electric screwdriver produced based on the MES system, including a speed reduction mechanism body, characterized in that: It also includes a torque adjustment sleeve, a torque adjustment ring protective sleeve, a torque adjustment ring, an annular structure force sensor, a torsion spring, a torsion push plate, a pressure spring and a pressure transmission ring, the inner wall of the torque adjustment ring is threadedly connected to the reduction mechanism main body, the torque adjustment sleeve is threadedly connected to the inner wall and the outer wall of the torque adjustment ring, the front end of the torque adjustment sleeve is connected to the reduction mechanism main body through a thread, the torsion spring is sleeved on the transmission main shaft of the reduction mechanism main body, the front end of the torsion spring is in contact with the inner end surface of the torsion adjustment ring, the rear end of the torsion spring is in contact with the torsion push plate, the torsion push plate is arranged inside the reduction mechanism main body, the annular structure force sensor and the pressure transmission ring are respectively sleeved on the transmission main shaft of the reduction mechanism main body, and a plurality of pressure springs are provided, one end of each pressure spring is connected to the pressure transmission ring, and the other end is in contact with the annular structure force sensor; A groove is provided in one end surface of the torque adjustment ring, and an external thread is provided on the outer circumference of the torque adjustment ring to cooperate with the torque adjustment sleeve; One end of the pressure transmission ring contacts the groove on the end surface of the torque adjustment ring, and the other end of the pressure transmission ring is provided with a plurality of guide posts for installing pressure springs; A second signal line is provided on the side wall of the annular force sensor, and a first signal line is provided inside the deceleration mechanism body. The second signal line is connected to one end of the first signal line, and the other end of the first signal line is connected to the interface of the force control instrument. A plurality of balls are arranged in a groove at one end of the pressure transmission ring which cooperates with the torque adjustment ring.

2. The electric screwdriver produced based on the MES system according to claim 1 is characterized in that: The main body of the deceleration mechanism includes a reducer, a signal line 1, a card slot 1, a torque transmission main shaft, an electric screwdriver head and a wire slot cover. One end of the torque transmission main shaft is connected to the reducer, and the other end of the torque transmission main shaft is connected to the electric screwdriver head. A card slot 1 is provided on the top of one end of the reducer, and the card slot 1 slides with the wire slot cover. The signal line 1 is provided inside the reducer, and one end of the signal line 1 extends to the outside of the reducer through the wire hole on the bottom wall of the card slot 1, and the other end of the signal line 1 extends to the outside of the reducer through the rear end of the reducer.

3. The electric screwdriver produced based on the MES system according to claim 1 is characterized in that: The end of the torque adjustment sleeve is provided with a torque adjustment ring protection sleeve.

4. A torque adjustment method for an electric screwdriver produced based on an MES system, characterized in that: The following steps are included: The MES integrated machine is turned on, the operator information is logged in, and the product from the previous workstation flows in; Scan the barcode gun to enter the installation parts information; The MES terminal displays the required torque value and the actual torque value of the current electric screwdriver. Check whether the torque value of the electric screwdriver currently assembling the component meets the torque value required by the component process. If the torque value of the electric screwdriver currently assembling the component meets the standard, it will be prompted as qualified and assembly can continue. If the torque value does not meet the standard, an alarm will be issued, and the operator will rotate the torque adjustment ring to adjust the torque value through the clutch device and deceleration device of the electric screwdriver. At the same time, the rotating torque adjustment ring cooperates with the ball and pressure transmission ring to apply the axial thrust generated by the rotation to the sensing end face of the annular structure force sensor through the pressure spring. Then, the force measurement control instrument and the MES system interact in real time, and the torque value during adjustment is displayed in the real-time torque value dialog box of the current workstation until the torque value is within the allowable error range of the torque value required by the current workstation process. The current torque value is prompted to meet the requirements, and a torque value OK prompt tone is issued. The assembly is completed and the system flows out of the current workstation.

5. The torque adjustment method for an electric screwdriver based on MES system production according to claim 4 is characterized in that: Each time a work order is changed, the adjusted torque value can be recorded in real time in the MES system database. The MES system data capture function can be used to export and archive the inspection and calibration data and time of the electric screwdriver.

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