CN107024943B - Torsion control method and torsion control system of pneumatic impact type torsion tool - Google Patents

Abstract

The present invention discloses a torque control method and a torque control system of a pneumatic impact torque tool. The method is as follows: a vibration sensor is set on the pneumatic impact torque tool, and the torque sensor is sleeved on the output end of the pneumatic impact torque tool; the tool is driven by the first and second working air pressures to perform a calibration operation to simultaneously obtain the first and second torque values and the first and second vibration values; a corresponding relationship curve between air pressure and torque is established based on the obtained working air pressure and torque value; at the same time, a corresponding relationship curve between air pressure and vibration frequency is established based on the working air pressure and vibration value; a target torque value is input between the first and second torque values to obtain a corresponding working air pressure, and the tool is driven to perform a locking operation accordingly; in the case of removing the torque sensor, a closed-loop monitoring can also be performed from the start to the end of the locking operation based on the above two relationship curves and only based on the vibration value sensed by the vibration sensor to determine whether the locking result meets the target torque value.

Description

Torque Control Method and Torque Control System of Pneumatic Impact Torque Tool

technical field

The present invention relates to a torque control method and control system of a pneumatic torque tool, especially for impact or pulse pneumatic torque tools, using a torque sensor TTD (Torque Transducer) and a vibration sensor BD (BPM Detector) The corresponding relationship curve between the air pressure, the output torque and the vibration value is established synchronously during the calibration, so as to achieve a torque control method and a control system for accurately controlling the target torque.

Background technique

The inventor of the present application has previously filed a patent application "torque control method and its torque control device" (application number 201410371437.6), which enables the pneumatic torque tool to accurately achieve the purpose of torque control. However, based on years of experience in torque control products, the inventor of the present application is still constantly pursuing the improvement of torque control products. The inventor of the present application believes that other devices and methods can still be used in the above patent application to achieve more accurate torque control. , and can greatly improve the flexibility and convenience of users. The inventor of the present invention thinks about using the torque sensor used in the above-mentioned patent application. Although the purpose of torque control can be accurately achieved, the manufacturing cost is high, especially for impact-type pneumatic torque tools, which also suffer from severe impact and vibration. The problem of service life, moreover, because it must be installed on the output end of the torque tool, it is often impossible to use due to the limitation of the operating space, causing great inconvenience.

Contents of the invention

The present invention provides a torque control method and its torque control system applied to pneumatic torque tools, especially the torque control of impact-type pneumatic torque tools, in order to further improve the accuracy of the torque control of the aforementioned patent application and overcome the aforementioned patent application , Due to the limitation of the operating space during use, the torque sensor cannot be used to improve the flexibility and convenience of the operation.

According to the object of the present invention, a torque control method is provided, which is especially applied to the locking operation of impact-type pneumatic torque tools. The torque control method includes the following steps: setting a vibration sensor to the impact-type pneumatic torque tool; From the beginning to the end of the operation, monitor whether the working air pressure is within the preset allowable variation range; before locking, use a torque sensor to verify the output torque of the fasteners used and the pieces to be locked According to the first working air pressure and the corresponding first torque value and the second working air pressure and the corresponding second torque value of the pneumatic torque tool that can be operated normally, a corresponding relationship curve between air pressure and torque is established; wherein the first working air pressure is not equal to the first Two working air pressures; at the same time, based on the first vibration frequency value sensed when the pneumatic torque tool is driven by the first working air pressure and the second vibration frequency value sensed when the pneumatic torque tool is driven by the second working air pressure, to establish A corresponding relationship curve between air pressure and vibration frequency value; input any target torque value between the first torque value and the second torque value, and obtain the corresponding working air pressure according to the corresponding relationship curve between air pressure and torque value, and use The working air pressure drives the pneumatic torque tool for locking operations; at the same time, according to the corresponding relationship curve between air pressure and vibration frequency, it is judged whether the vibration frequency value sensed by the vibration sensor is correct when the working air pressure is used to drive the pneumatic torque tool for locking operations. Meet the target torque value. In this way, three parameters are used to control the output torque of the impact-type pneumatic torque tool, making the result more accurate and reliable.

During operation, the pneumatic impact torque tool can remove the torque sensor after the above two corresponding relationship curves are established, and only use the vibration frequency value sensed by the vibration sensor attached to the pneumatic impact torque tool to store Based on the two corresponding relationship curves of the torque control device, only according to the working vibration frequency value and the corresponding relationship curve between the air pressure and the vibration frequency value, the closed-loop monitoring can be done at the beginning of the locking operation. Vibration value, to judge whether the locking result is consistent with the target torque value.

Preferably, the torque control method may include the following steps: using a pneumatic impact torque tool equipped with a vibration sensor, before locking, using a torque sensor to first output the torque for the fastener used and the piece to be locked verification work. Through the microprocessor in the torque control device, the automatic air pressure regulating device is controlled by a program, and the time required for the locking operation is set, and the second working air pressure is gradually increased to the first working air pressure or the first working air pressure is gradually lowered. To the second working air pressure, during the calibration process, the sensing values of air pressure and torque as well as air pressure and vibration frequency are recorded at the same time, so as to establish corresponding relationship curves and store them in the torque control device, making the setting process more efficient easy.

According to the above-mentioned air pressure, torque and vibration values stored in the torque control device, the relationship curve established after verification can also be added to the time required for locking operations or the tightening detected by the torque sensor. Parameters such as the rotation angle from when the piece is locked to the working surface are calculated, and the torque control device is used for more precise torque control.

Preferably, the method may further include the following steps: driving the pneumatic torque tool with the working air pressure corresponding to the target torque value for locking; judging whether the target torque value has been reached according to the strain value sensed by a torque sensor, to determine Whether the locking operation is qualified or not.

Preferably, the method may further include the following steps: driving the pneumatic torque tool with the working air pressure corresponding to the target torque value for locking; judging whether the target torque value has been reached only based on the strain value sensed by a torque sensor, And according to the set air pressure automatic adjustment device in the program-controlled torque control device, the air pressure is gradually increased within the adjustable range until it is locked to the target torque value, and the air supply is cut off. If the target torque value cannot be reached after automatic pressure regulation, a warning will be issued with sound or light, and the failure will be displayed with words or symbols.

Preferably, when performing the locking operation, the method may further include the following steps: according to the time required for the entire locking operation; and according to the torque sensing value sensed by a torque sensor and the vibration sensed by the vibration sensor Value judgment; when the locking operation reaches the target torque value, whether it is within the predetermined locking time and the corresponding sensed vibration value range, to determine whether the locking operation is qualified or not.

Preferably, the pneumatic torque tool can utilize a torque sensor and its built-in angle sensor, and the method can further include the following steps: using the torque sensor to sense the torsional strain value, and when the torque of the veneer of the fastener is sensed, When the strain value is reached, the angle sensor starts to calculate the rotation angle and judge whether the locking operation is within the predetermined locking angle range at the same time when the target torque value is reached, so as to determine whether the locking operation is qualified or not.

Preferably, the pneumatic torque tool can utilize a torque sensor and a built-in angle sensor, and the method can further include the following steps: according to the time required for the entire locking operation; using the torque sensor to sense the torsional strain value, and When the torsional strain value of the fastener veneer is sensed, the angle sensor starts to calculate the rotation angle; and judges whether the locking time and the locking angle are within the predetermined range when the locking operation reaches the target torque value, and then Determine whether the locking operation is qualified or not.

The torque control method of the present invention is based on the combination of the default time required for the entire locking operation, the target torque value, the vibration sensing value, the rotation angle of the fastener after veneering, etc., and the type of pneumatic torque tool, Characteristics, such as: clutch type, planetary gear reduction static type (Torque Multiplier), oil pressure pulse type or impact type and specifications for various locking operations; such as: torque mode, time+torque mode, angle+torque mode or time +torque+angle mode, etc., can set the control parameters, the priority of parameter judgment and the control accuracy range according to the program, so that the application range is wider and the torque control accuracy and reliability are improved.

According to the object of the present invention, a torque control system is provided, which is connected with a pneumatic air supply system, a torque control device, a pneumatic torque tool and a torque sensor. The vibration sensor is arranged on the pneumatic torque tool. The torque sensor is elastically installed on the axis of the output end of the pneumatic torque tool. The torque control device includes: intake pressure monitoring module, air pressure regulating module, solenoid valve, memory unit and microprocessor. The air intake pressure monitoring module controls the air pressure entering the torque control device from the air pressure system, and at the same time gives a warning when the intake air exceeds the upper limit of the air pressure set by the torque control device. The air pressure adjustment module adjusts a working air pressure output to the pneumatic torque tool. The air pressure adjustment module automatically or manually adjusts the level of the working air pressure according to the instructions set by the program; the solenoid valve opens or cuts off the air pressure source output to the pneumatic torque tool; the memory unit Store each control parameter and before the formal locking operation, the pneumatic torque tool is within the air pressure range that can work stably, and the torque sensor is driven by the first working air pressure and the second working air pressure respectively for the same specification and type of fasteners and pieces to be locked Obtaining the corresponding first torque value and second torque value, and the corresponding first vibration frequency value and second vibration frequency value sensed by the vibration sensor through verification, wherein the first working air pressure is not equal to the second working air pressure; The microprocessor establishes a corresponding relationship curve between air pressure and torque according to the first working air pressure, the second working air pressure, the first torque value and the second torque value, and according to the first working air pressure and the second working air pressure and the corresponding first The vibration frequency value and the second vibration frequency value establish a corresponding relationship curve between air pressure and vibration frequency.

Wherein, when the locking operation is officially performed, a target torque value is input within the range between the first torque value and the second torque value, and the microprocessor obtains the working air pressure corresponding to the target torque value on the corresponding relationship curve between air pressure and torque, The microprocessor then drives the pneumatic torque tool according to the working air pressure to carry out the locking operation. And the microprocessor judges whether the corresponding vibration frequency value matches the target torque value when the working air pressure is used to drive the pneumatic torque tool for locking operation according to the working vibration frequency value sensed by the vibration sensor and the corresponding relationship curve between air pressure and vibration frequency .

Preferably, the torque control device can further include an input module, which can have an automatic setting button; before the locking operation, when the calibration operation of the output torque is performed first, when the automatic setting button is triggered, the micro-processing The controller automatically increases the air pressure from the second working air pressure to the first working air pressure gradually, or gradually lowers the first working air pressure to the second working air pressure with the default program, so as to establish the corresponding relationship curve between air pressure and torque, as well as air pressure and vibration frequency The corresponding relationship curves are recorded in the memory unit at the same time.

Preferably, a portable electronic device or a wearable electronic device with a built-in power module and a simple microprocessor can be further provided with a display module, a warning module and an input/output module to facilitate operation.

Preferably, during the locking operation, the solenoid valve is controlled by the microprocessor to output the working air pressure to the pneumatic torque tool, and when the microprocessor judges that the strain value sensed by the torque sensor has reached the target torque value, it is judged that the locking is qualified And cut off the air supply.

Preferably, when performing the locking operation, the microprocessor, according to the time required for the locking operation, when the strain value sensed by the torque sensor has reached the target torque value, according to whether the locking time is within the predetermined locking time Time range to judge whether the locking operation is qualified or not.

Preferably, the pneumatic torque tool can use the torque sensor and its built-in angle sensor; when performing locking operations, when the torque sensor senses the torsional strain value of the fastener locked to the veneer, the angle sensor starts to calculate the rotation angle , when the torsional strain value reaches the target torque value, the microprocessor judges whether the locking operation is qualified or not according to whether the locking angle is within a predetermined locking angle range.

Preferably, during the locking operation, if the torque sensor needs to be removed due to the limitation of the working space, the microprocessor only bases on the sensed vibration value and the relationship between air pressure, torque and vibration value established through verification The curve can still be used for closed-loop control. When the target torque value is reached, the corresponding vibration value is compared to determine whether the locking operation is qualified or not.

The torque control method and its torque control system of the present invention may have one or more of the following advantages:

(1) In the torque control method and its torque control system of the present invention, in addition to using the air pressure and torque correspondence curve established through verification to obtain the working air pressure corresponding to the target torque for locking operations, further use vibration The sensor establishes the corresponding relationship curve between air pressure and vibration frequency when the torque is checked, and when the target torque value is reached, the corresponding vibration value is compared to determine whether the locking operation is qualified or not. This parameter can effectively improve the accuracy of torque control, and it can still be based only on the sensed vibration value and the air pressure and torque established after verification when the torque sensor needs to be removed due to the limited working space. And the relationship curve of the vibration value is used for closed-loop control to carry out the locking operation with controllable torque and determine whether the locking operation is qualified or not.

(2) In the torque control method and its torque control system of the present invention, the display module, warning module, and input/output module of the torque control device can be independently set on a portable electronic device or a wearable electronic device with a built-in power module and a simple microprocessor. Electronic device for easy operation.

(3) The torque control method and its torque control system of the present invention can automatically set up the corresponding relationship curve of air pressure and torque and the corresponding relationship curve of air pressure and vibration frequency by the automatic setting mode, so as to effectively increase the verification. efficiency.

(4) The torque control method and its torque control system of the present invention are configured by various locking modes such as torque mode, time and torque mode, torque and angle mode, and time, torque and angle mode, thereby increasing The application level of the torque control method and the torque control system of the present invention can effectively increase its practicability and control precision.

Description of drawings

FIG. 1 is a step diagram of the torque control method of the present invention.

FIG. 2 is a block diagram of the torque control system of the present invention.

Fig. 3 is a diagram of automatic setting steps of the torque control system of the present invention.

FIG. 4 is a block diagram of another embodiment of the torque control system of the present invention.

FIG. 5 is a step diagram of the torque mode locking operation of the torque control method of the present invention.

FIG. 6 is a step diagram of the time and torque mode locking operation of the torque control method of the present invention.

7 is a step diagram of the locking operation in the angle and torque mode of the torque control method of the present invention.

8 is a step diagram of the time, angle and torque locking operation mode of the torque control method of the present invention.

FIG. 9 is a graph showing the corresponding relationship among air pressure, torque and vibration frequency of the torque control method and the torque control system of the present invention.

Symbol Description

1: Pneumatic piping system

2: Torque control device

3: Pneumatic torque tool

4: Torque sensor

5: Shock sensor

6: Angle sensor

7: Wearable device

8: Torque control system

20: Power module

20': Wearable Power Module

21: Intake pressure monitoring module

22: Air pressure adjustment module

23: Solenoid valve

25: Microprocessor

25': Microprocessor for wearables

26: I/O module

26': Wearable I/O module

27: Display module

27': Display module for wearable

28: memory unit

28': Wearable memory unit

29: warning unit

29': Wearable warning unit

30: Automatic setting button

51: The first working pressure

52: Second working air pressure

53: First torque value

54: second torque value

55: The first vibration frequency value

56: Second vibration frequency value

57: Corresponding relationship curve between air pressure and torque

58: Corresponding relationship curve between air pressure and vibration frequency

S11～S16, S31～32, S51～S52, S61～62, S71～S73, S81～S84: steps

Detailed ways

In each of the following embodiments, for example, it includes technical means such as the corresponding relationship between air pressure and torque, air pressure adjustment, and monitoring of stable air pressure, which are described in the patent application "torque control method and its torque control device" (application number 201410371437.6) , which is hereby incorporated in its entirety as a part of the specification of this application.

As shown in FIG. 1 , it is a step chart of the torque control method of the present invention. As shown in the figure, the torque control method of the present invention includes the following steps: (S11) setting a vibration sensor on the pneumatic impact torque tool; (S12) connecting the air pressure line from the air pressure system to the torque control device, and starting from the locking operation Output stable working air pressure to the pneumatic impact torque tool from the beginning to the end; (S13) Before locking, use the torque sensor installed at the output end of the pneumatic impact torque tool to output the fastener and the piece to be locked first Torque calibration operation, based on the first working air pressure and the corresponding first torque value and the second working air pressure and the corresponding second torque value of the pneumatic impact torque tool that can be operated normally, establish the corresponding relationship curve between air pressure and torque; S14) According to the first vibration frequency value corresponding to the first working air pressure and the second vibration frequency value corresponding to the second working air pressure, establish a corresponding relationship curve between air pressure and vibration frequency; (S15) input between the first and second The target torque value between the torque values is obtained according to the corresponding relationship curve between air pressure and torque to obtain the corresponding working air pressure value, and the working air pressure is used to drive the pneumatic impact torque tool to perform the locking operation; and (S16) according to the vibration sensor sensing The working vibration frequency value and the corresponding relationship curve between air pressure and vibration frequency, judge whether the corresponding vibration value meets the target torque value when the working air pressure is used to drive the pneumatic impact torque tool for locking operation.

To put it simply, the torque control method of the present invention sets the vibration sensor on the pneumatic impact torque tool, so that when establishing the corresponding relationship curve between air pressure and torque, a nearly linear corresponding relationship curve between air pressure and vibration frequency can be established (as shown in Figure 9). Therefore, when the locking operation is performed with the working air pressure corresponding to the target torque value, the vibration frequency value sensed by the vibration sensor can be used to simultaneously verify whether the target torque value is met.

Incidentally, the first working air pressure and the second working air pressure are used in establishing the corresponding relationship curve between air pressure and torque and the corresponding relationship curve between air pressure and vibration frequency, wherein the first working air pressure is not equal to the second working air pressure. And preferably, the first working air pressure can be the highest working air pressure among the working air pressures that can be output stably, and the second working air pressure can be the lowest working air pressure among the working air pressures that can be output stably. In addition, since the first working air pressure is the highest allowable working air pressure of the pneumatic torque tool, and the second working air pressure is the lowest working air pressure that the air torque tool can normally operate, the first torque value can be the maximum torque value, and The second torque value may be a minimum torque value.

As shown in Figure 2 and Figure 3. As shown in steps S31 to 32 of Figure 3, when the calibration of the output torque is performed before locking, if the automatic setting button 30 of the input and output module 26 is triggered, the microprocessor 25 can automatically set Program control, gradually increase from the second working air pressure 52 to the first working air pressure 51, or gradually reduce from the first working air pressure 51 to the second working air pressure 52, to establish the corresponding relationship curve 57 between air pressure and torque and air pressure and vibration frequency The corresponding relationship curve 58. In order to use the automatic pressure regulation module of the torque control device so that when the target torque value cannot be reached, the air pressure can be automatically fine-tuned upwards through the microprocessor according to the set program, until the target torque value is reached, the air source is cut off or it is still unable to reach the target torque value in the end. When the target torque is reached, a warning is issued and the air source is cut off. For this purpose, the actual operating air pressure can be set to be 10-20% lower than the allowable maximum operating air pressure of the pneumatic torque tool as needed.

Wherein, if it is a manual mode, it is of course to manually adjust the air pressure to the first working air pressure 51 to obtain the first torque value 53 and the first vibration frequency value 55, and then adjust the air pressure to the second working air pressure 52 to obtain the second The torque value 54 and the second vibration frequency value 56 respectively take the connection between the high point and the low point to establish a corresponding relationship curve 57 between air pressure and torque and a corresponding relationship curve 58 between air pressure and vibration frequency.

The torque control method of the present invention can be applied to the torque control system 8 . The torque control system 8 includes a torque sensor 4 , a vibration sensor 5 and a torque control device 2 . The torque control device 2 is mainly connected between a pneumatic system 1 and the pneumatic torque tool 3 . The torque control device 2 mainly includes an intake pressure monitoring module 21, an air pressure regulating module 22, a solenoid valve 23, a memory unit 28 and a microprocessor 25, and may also include a display module 27, a warning unit 29, an input/output module 26 and other components . The air pressure adjustment module 22 may include automatic or manual pressure adjustment modules, air pressure proportional control valves, air pressure control valves and other components, which will not be repeated here.

The vibration sensor 5 is arranged on the pneumatic torque tool 3 (such as the pneumatic impact torque tool), and the torque sensor 4 is installed on the output end of the pneumatic torque tool 3, which is connected to the microprocessor 25 in a wired or wireless manner; wherein the vibration sensor 1. The torque sensor and the torque control device use communication modules to communicate with each other through wired or wireless transmission, such as RS232, RS485, USB and related communication protocols RF, BT, WIFI, ZB, etc. The shock sensor 5 can include sensing components such as accelerometers and other sensing components that can sense the vibration frequency of tools, signal amplification circuits, microprocessors, power supplies or transmission modules, etc., and it is connected to the microprocessor in a wired or wireless transmission mode. 25.

The air intake pressure monitoring module 21 controls the air pressure entering the torque control device 2 from the air pressure system 1 , or uses the warning module 29 to issue a warning when the intake air exceeds the upper pressure limit of the torque control device 2 . The air pressure adjustment module 22 adjusts an air pressure output to the pneumatic torque tool 3 . The solenoid valve 23 turns on or cuts off the air pressure source output to the pneumatic torque tool 3 .

The memory unit 28 stores the pneumatic torque tool 3 within the stable working air pressure range. Before the formal locking operation, the fasteners of the same specification and type and the parts to be locked are respectively calibrated with the first working air pressure 51 and the second working air pressure 52. Obtain the corresponding first torque value 53 and second torque value 54 respectively, and the first vibration frequency value 55 corresponding to the first working air pressure 51 and a first vibration frequency value corresponding to the second working air pressure 52 sensed by the vibration sensor 5 The second vibration frequency value is 56. The microprocessor 25 establishes a corresponding relationship curve 57 between air pressure and torque based on the first working air pressure 51, the second working air pressure 52, the first torque value 53, and the second torque value 54 obtained through verification, and according to the first working air pressure 51. The second working air pressure 52, the first vibration frequency value 55, and the second vibration frequency value 56 establish a corresponding relationship curve 58 between air pressure and vibration frequency. Therefore, when the locking operation is officially performed, the microprocessor 25 can obtain the corresponding target torque value from the corresponding relationship curve 57 between air pressure and torque according to a target torque value input in the first and the second torque values 53 and 54 According to the working air pressure, the microprocessor 25 drives the pneumatic torque tool 3 to perform the locking operation. Next, the microprocessor 25 can simultaneously judge whether the sensed vibration frequency value matches the target torque value according to the vibration frequency value sensed by the vibration sensor 5 and the corresponding relationship curve 58 between air pressure and vibration frequency.

In practical application, the microprocessor 25 simultaneously judges whether the sensed vibration frequency value meets the target torque value according to the strain value sensed by the torque sensor 4 and the vibration frequency value obtained from the corresponding relationship curve 58 between air pressure and vibration frequency. . In this way, using both of them simultaneously to determine whether the locking operation meets the target torque value can improve the accuracy of torque control. Of course, only one of the methods may be selectively used to determine whether the locking operation meets the target torque value. For example, the microprocessor 25 can judge whether the locking operation meets the target torque value only according to the strain value of the torsion force, or only according to the frequency sensing value of the vibration. Since the torque sensor 4 is a relatively expensive component, and it is easy to cause damage under long-term and severe impact locking operations, if the torque sensor 4 is removed after the calibration is completed, the vibration frequency value is only detected based on the vibration sensor , can still be used for closed-loop control to determine whether the locking operation meets the target torque value. In addition to reducing purchase costs, it is also suitable for workplaces where torque sensors cannot be used due to limited operating space.

In addition, in the above-mentioned automatic mode, the air pressure adjustment module 22 includes an automatic pressure adjustment module, an air pressure proportional control valve, and an air pressure pressure control valve. The pneumatic torque tool 3 is automatically adjusted to the working air pressure corresponding to the target torque value by the air pressure proportional control valve and the air pressure control valve, so as to avoid over-torque at the moment of starting. Even further, the working air pressure corresponding to the target torque value can be automatically adjusted according to the strain value sensed by the torque sensor 4, the vibration frequency value obtained by querying the corresponding relationship curve 58 between air pressure and vibration frequency, or a combination of the two. . Among them, if the working space is limited, after the torque sensor 4 is removed, the closed-loop torque control can still be performed based on the established corresponding relationship curve 57 between air pressure and torque and the corresponding relationship curve 58 between air pressure and vibration frequency. Locking work.

As shown in Figure 4, in a preferred embodiment, additional functional modules can be added, such as electronic components such as a display module 27', a microprocessor 25', a warning module 29', and an input/output module 26' in portable electronic devices or In the wearable electronic device, it is convenient for the user to operate and communicate with the microprocessor 25 in a wireless manner. Portable electronic devices can be tablet computers, smart phones or notebook computers, etc., while wearable electronic devices can be smart watches, smart glasses or smart helmets, etc., which can include; power supply, microprocessor, wireless input and output module, display module and warning module, etc.

In actual application, various locking modes such as torque mode, time and torque mode, torque and angle mode, and time, torque and angle mode can be set up for locking operations, in order to respond to various locking operations. The requirements for the quality specifications of fasteners and parts to be locked are explained as follows.

As shown in Figure 5. As shown in steps S51-S52, if the locking is performed in the torque mode, the microprocessor 25 controls the solenoid valve 23 to drive the pneumatic torque tool 3 according to the working air pressure corresponding to the target torque value when the locking operation starts. Simultaneously, the torque sensor 4 can continuously transmit the sensed torsional strain value to the microprocessor 25, and the microprocessor 25 can continuously compare whether the torsional strain value meets or has reached the target torque value; when the microprocessor 25 When it is determined that the torque strain value meets or has reached the target torque value, the solenoid valve 23 is controlled to cut off the air pressure source output to the pneumatic torque tool 3 to complete the locking operation and determine that the locking operation is qualified.

As shown in Figure 6. As shown in steps S61-62, if the locking is performed in the time and torque mode, when the locking operation starts, the torque sensor 4 will continuously transmit the sensed torsional strain value to the microprocessor 25, and The microprocessor 25 will constantly compare whether the torque strain value meets or has reached the target torque value; at the same time, the microprocessor 25 will accumulate a locking time since the solenoid valve 23 starts to drive the pneumatic torque tool 3, and compare the lock Whether the locking time meets the predetermined locking time range. When the microprocessor 25 judges that the torque strain value has reached the target torque value, and the locking time is within the predetermined time range, the control solenoid valve 23 immediately cuts off the air pressure source output to the pneumatic torque tool 3, completes the locking operation and determines whether the lock is locked. The solid work is qualified.

As shown in Figure 7. As shown in steps S71-73 in the figure, the torque comparison and judgment are as described above, and will not be repeated here. If the locking is performed in the angle and torque mode, the pneumatic torque tool 3 can utilize the angle sensor 6 built into the torque sensor 4 . When carrying out the locking operation, when the fastener is locked to the moment when the fastener is attached to the piece to be locked, the torsional strain value sensed by the torque sensor 4 will produce an obvious peak value; 6. The rotation angle that starts to be sensed is compared with whether the locking angle value reaches the predetermined locking angle range. When the microprocessor 25 judges that the torque strain value has reached the target torque value and the locking angle displacement reaches the predetermined locking angle range, the solenoid valve 23 is controlled to cut off the air pressure source output to the pneumatic torque tool 3 to complete the locking operation And determine that the locking operation is qualified.

As shown in Figure 8. As shown in steps S81-84 in the figure, the comparison and judgment of the torque, angle and time are as described above, and will not be repeated here. In short, when the microprocessor 25 judges that the torsion strain value reaches the target torque value, the locking angle value is within the predetermined locking angle range, and the locking time value is also within the predetermined locking time range, it determines that the locking The solid work is qualified. It is worth mentioning that the locking angle value conforms to the predetermined locking angle value and the locking time value conforms to the predetermined locking time value, which may have an acceptable acceptable range, for example, ±10%, both of which can be judged as qualified. Therefore, the numerical difference caused by the unavoidable difference of the soft and hard joint surfaces between the fastener and the piece to be locked can be ignored.

To sum up, the torque control method and its torque control system of the present invention further utilize the vibration frequency value measured by the vibration sensor 5 installed in the pneumatic impact torque tool 3 to determine whether the locking operation reaches the target torque value. Therefore, the accuracy of torque control can be effectively improved. In the case of limited working space, after the torque sensor 4 is removed, the closed-loop twist control lock can still be performed from the established corresponding relationship curve 57 between air pressure and torque and the corresponding relationship curve 58 between air pressure and vibration frequency. Solid work. In addition, the same functional modules in the torque control device, such as a display unit, a memory unit, an input/output module, a warning unit, a microprocessor, etc., can also be added to a portable electronic device or a wearable electronic device 7, and combined with the torque control device It is transmitted by wireless communication, which can effectively increase the convenience of use. In addition, the corresponding relationship curves of air pressure and torque and the corresponding relationship curves of air pressure and vibration frequency can be automatically established through the automatic setting mode, thereby effectively increasing the convenience of operation. And in the locking operation, the torque control method and its torque control system of the present invention can have the configuration of multiple locking modes, thus can increase the application level of the torque control method of the present invention and its torque control system, thereby can effectively Increase practicality and convenience in use.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. Various modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the above disclosure. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (14)

1. a kind of torsion control method, which is characterized in that be applied to the locking operation of Pneumatic impact dynamic torque tool, it includes The following steps:

Shock sensor is set to the Pneumatic impact dynamic torque tool；

From baric systerm connection pneumatic circuit to torque controlling device, to export stable operating air pressure to the Pneumatic impact Dynamic torque tool, and in the starting of locking operation to during terminating, monitoring work air pressure is within the scope of preset allowable variation；

Before locking, the first fastener to same specification, type and the verification operation to locking part progress outputting torsion, according to institute State Pneumatic impact dynamic torque tool can normal operating the first operating air pressure and corresponding first torque value and the second operating air pressure And corresponding second torque value establishes the corresponding relationship curve of air pressure and torque；Wherein first operating air pressure is not equal to described Second operating air pressure；Meanwhile

According to the first vibration frequency value for corresponding to first operating air pressure and corresponding to the of the second operating air pressure value Two vibration frequency values establish the corresponding relationship curve of air pressure and vibration frequency；

The target torque value between the first torque value and the second torque value is inputted, according to air pressure pass corresponding with torque It is curve to obtain the operating air pressure of corresponding target torque value, and the Pneumatic impact torsion work is driven with the operating air pressure Tool carries out locking operation；And

Corresponding relationship according to the operation vibration frequency values of shock sensor sensing and the air pressure and vibration frequency value is bent Line, when judging to drive the Pneumatic impact dynamic torque tool to carry out locking operation with the operating air pressure, the operation vibration frequency Whether rate value meets the target torque value.

2. the torsion control method as described in claims require 1, which is characterized in that before locking, first carry out output torsion The verification operation of power, further includes the following steps:

The time required to being set according to operation to be locked；

Air pressure is adjusted in a manual manner, and first torque value and the first vibration frequency are obtained to first operating air pressure Rate value, then air pressure is adjusted to second operating air pressure to obtain second torque value and the second vibration frequency value, divide Do not take the connection of its high and low point-to-point transmission, with establish the air pressure and torque corresponding relationship curve and the air pressure and vibration frequency The corresponding relationship curve of rate；

Either,

It is stepped up by second operating air pressure to first operating air pressure in a manner of automatic Regulation, or by first work Make air pressure and gradually downgrade the second operating air pressure mode, to establish the corresponding relationship curve of the air pressure and torque and described The corresponding relationship curve of air pressure and vibration frequency.

3. torsion control method as described in claim 1, which is characterized in that when carrying out locking operation, the method is more wrapped Containing the following steps:

The Pneumatic impact dynamic torque tool is driven to lock with the operating air pressure of the correspondence target torque value；

When the twist value judgement that foundation torsion sensor senses has reached the target torque value, the operation conjunction that locks is judged Lattice.

4. torsion control method as described in claim 1, which is characterized in that when carrying out locking operation, the method is more wrapped Containing the following steps:

According to the locking time needed for locking operation；And

According to the twist value that torsion sensor senses, when twist value has reached the target torque value, according to institute Whether the locking time of consumption is qualified or not with judgement locking operation in scheduled locking time range.

5. torsion control method as described in claim 1, which is characterized in that the method further includes the following steps:

Twist value is sensed using torsion sensor；

Rotation angle is calculated using its built-in angular transducer to generate locking angle；Wherein the angular transducer is described When torsion sensor senses fastener and touched the strain value of working face, start to calculate rotation angle；

When the twist value reaches the target torque value, according to the locking angle whether in scheduled locking angle It is qualified or not with judgement locking operation in range.

6. torsion control method as described in claim 1, which is characterized in that the method further includes the following steps:

According to the locking time needed for locking operation；

Twist value is sensed using torsion sensor；

Rotation angle is calculated using its built-in angular transducer to generate locking angle；Wherein the angular transducer is described When torsion sensor senses fastener and touched the strain value of working face, start to calculate rotation angle；

When the twist value reaches the target torque value, according to the locking angle whether in scheduled locking angle In range and whether the locking time is in a predetermined locking time range, qualified or not with judgement locking operation.

7. a kind of torsion control system, characterized by comprising:

Shock sensor is arranged on Pneumatic impact dynamic torque tool；

Torsion sensor is flexibly installed in the axis at Pneumatic impact dynamic torque tool power output end in a manner of built-in or is plug-in Line；

Torque controlling device is connected between baric systerm and Pneumatic impact dynamic torque tool, it includes:

Admission pressure monitoring module controls the air pressure for entering the torque controlling device from baric systerm, or super in air inlet Out when the upper pressure limit of the torque controlling device, warning is proposed；

Air pressure adjustment module is big for the air pressure that adjusts the output to the Pneumatic impact dynamic torque tool in manual or automated manner It is small；

Solenoid valve is shut on or off the pneumatic supply of output to the Pneumatic impact dynamic torque tool；

Memory unit, storage according to the Pneumatic impact dynamic torque tool carry out formally lock before, can steady operation gas Press in range, using torsion sensor, to the fastener of same specification, type with verified to locking part to obtain the first work Make air pressure and corresponding first torque value and the second operating air pressure to sense with corresponding second torque value and the shock sensor The corresponding first vibration frequency value and the second vibration frequency value arrived, wherein first operating air pressure is not equal to second work Make air pressure；

Microprocessor, according to first operating air pressure, the second operating air pressure, the first torque value and the second torque value, foundation The corresponding relationship curve and first operating air pressure of air pressure and torque, the second operating air pressure, the first vibration frequency value and the Two vibration frequency values, the air pressure of foundation and the corresponding relationship curve of vibration frequency, and according to the feedback signal of sensor, it is each to instruct Unit module does the outputting torsion control of loop circuit；

Wherein, when formally carrying out locking operation, according to the target inputted within the scope of first torque value and the second torque value Torque value, the microprocessor obtain corresponding operating air pressure, micro process on corresponding relationship curve of the air pressure with torque Device drives the Pneumatic impact dynamic torque tool according to the operating air pressure again to carry out locking operation, the microprocessor according to According to the vibration frequency value of the corresponding relationship curve and shock sensor sensing of the air pressure and vibration frequency, to judge to lock Whether operation is qualified.

8. torsion control system as claimed in claim 7, which is characterized in that the institute of the Pneumatic impact dynamic torque tool installing The torsion sensor and the torque controlling device of shock sensor and connection are stated, between each other respectively with communication module, with Wired or wireless way sendes or receive sensing value.

9. torsion control system as claimed in claim 7, which is characterized in that further include input module, there is automatic setting Button, before locking, the microprocessor according to the time required to the operation setting that locks when verification operation to carry out outputting torsion, After the automatic setting button is triggered, the microprocessor is stepped up by second operating air pressure to first work Air pressure, or second operating air pressure is gradually downgraded by first operating air pressure, to establish pair of the air pressure and torque Answer the corresponding relationship curve of relation curve and the air pressure and vibration frequency.

10. torsion control system as claimed in claim 7, which is characterized in that separately set a set of microprocessor, input module, show Show module, a power module and alarm module in portable electronic device or wearable electronic device, and wirelessly with The torque controlling device is communicated, to facilitate operation person's use.

11. torsion control system as claimed in claim 7, which is characterized in that when carrying out locking operation, the microprocessor According to the operating air pressure of the corresponding target torque value, Pneumatic impact dynamic torque tool described in the solenoid-driven is controlled To lock, and the microprocessor has reached the target torque value in the twist value that the torsion sensor senses When, cutting gas source completes locking operation.

12. torsion control system as claimed in claim 7, which is characterized in that when carrying out locking operation, the microprocessor According to the locking time needed for locking operation, reach the target torque value in the twist value that torsion sensor senses When, it is qualified or not with judgement locking operation depending on spent time whether in scheduled locking time range.

13. torsion control system as claimed in claim 7, which is characterized in that the Pneumatic impact dynamic torque tool utilizes institute State torsion sensor and the built-in angular transducer of the torsion sensor, when carrying out locking operation, the microprocessor root When sensing fastener according to the torsion sensor and touching the strain value of working face, start to calculate rotation depending on the angular transducer Lock angle caused by tight angle, if qualified or not with judgement locking operation in the angular range of predetermined locking.

14. torsion control system as claimed in claim 7, which is characterized in that the Pneumatic impact dynamic torque tool utilizes institute State torsion sensor and the built-in angular transducer of the torsion sensor, when carrying out locking operation, the microprocessor root When sensing fastener according to the torsion sensor and touching the strain value of working face, start to calculate rotation depending on the angular transducer Whether lock angle caused by tight angle, if in the angular range of predetermined locking, and according to locking spent time pre- It is qualified or not with judgement locking operation in fixed locking time range.