TWI625616B - Torque monitoring method of pulse torque tool and control device thereof - Google Patents

Abstract

The invention relates to a torsion force monitoring method and a control device thereof for a pulse torsion tool. During verification, a characteristic curve of a tapping mechanism and a torque output of a tool are verified by a pulse torsion tool during the locking process (characteristic curve). And a parameter of the operating parameter vs. the number of revolutions of the striking mechanism, and monitoring the number of revolutions of the striking mechanism during locking to achieve the purpose of controlling the output torque of the tool. .

Description

Torque monitoring method of pulse torque tool and control device thereof

The invention relates to a non-invasive torque monitoring method and control device, and is particularly suitable for pulsed torque control. Designed to apply an acceleration gauge to the outside of the pulse torque tool to identify the difference between the vibration values generated by the tapping mechanism during the idling and locking, to detect the BPM per minute during the tool locking process, and to check the tool in advance. BPM vs. Characteristic Curve, which calculates the torque output of the current tool to achieve the function of closed loop monitoring output torque. Each pulse torque tool corresponds to a unique BPM vs. torque characteristic. It is unique and unique. It will not change with operating conditions such as pressure, flow, and motor wear unless the tapping mechanism is changed.

Torque tools are powered by manual, pneumatic and electric. The torque output mode can be divided into static type and pulse type. Static Torque Tools Whether manual, pneumatic or electric tools, torque gauges can be added to the tool output, plus the solenoid valve supplied by the air supply or the addition of a clutch to cut off the torque of the tool. The pulsed torque tool outputs a wave of non-continuous pulsed torque. The American Tyre Industry Association's more direct point-pulse tool is not recommended for being classified as a controllable torque tool. Since the pulsed torque tool takes a tapping method, the advantage is the tool Small, the output torque is large, the disadvantage is that the vibration is large, and the output torque is difficult to control. Although the tool output torque can be controlled by adjusting the operating parameters, there are too many variables affecting the output torque of the tool, such as pressure, flow, pipe diameter, motor wear, etc. It is not possible to ensure that the output torque of the tool is consistent with the expected setting by controlling one or two parameters, such as changing the flow (current) and the pressure of the source (voltage). Due to the lack of sensor feedback torque information, basically the control mode of these application parameter settings can only be classified as open loop control. Two open loop control methods often used for pneumatic tools:

Flow control: Most of the traditional pneumatic impact wrenches are equipped with several sections of flow adjustment, which regulate the output torque by adjusting the flow. A prerequisite for the flow control approach is the need for a stable supply of gas, including the size of the pipe, and the pressure must maintain a constant pressure. Since P=IV, even under the same air source pressure conditions, even the same flow setting tool output torque will change, and vice versa.

Pressure control: Since the measured flow must be measured dynamically during actual operation, the pressure can be measured before and during actual operation. Moreover, the pressure sensor is simpler and cheaper than the flow meter. The experiment shows that under the condition of a stable gas supply, motor operation is not overloaded, the inertia of the sleeve and the connecting rod remain unchanged, etc., the output torque of the pulse torque tool is within a certain range and the pressure of the air source. An approximately linear relationship is formed, and the tool output torque can be controlled by controlling the pressure within a certain range. The prerequisite is that all parameters that affect the torque output must be guaranteed to be within the controllable range and set conditions. However, the biggest disadvantage of open loop control is that the torque change caused by the change of parameters during the locking process cannot be detected immediately.

Adding Sensors and Shut off Valves: Due to the difficult physical properties of intermittent torsional pulse waves, the theory, patents, and actual control devices that have been dedicated to the development of pulsed torque control for decades have been ridiculous. The methods of development of major tools are the same. For example, Stanley PSI, Atlas Pulsor C torque control system, in addition to the sensor to detect the current output torque of the tool, and cut off the air source through the Shut off valve to achieve the control tool output torque the goal of. In fact, the torque sensed on the sensor is not equal to the actual torque applied by the pulse tool to the bolt as described above. In addition, considering the reaction time of the solenoid valve (more than 30 milliseconds), it is not undoubted whether the gas supply can be shut down immediately. The knocking mechanism knocks the torque applied to the bolt one or two times before closing the air source, which may deviate from the preset torque value by more than ten percent. The reason why this type of twist control is not popular is that the system is complicated, expensive, inconvenient to operate, especially the control is not accurate enough (+/- 50%). Other problems, such as the effect of the inertia of the connecting rod sleeve on the pulse torsion, must also be considered.

Motor Mounting Encoder: A previous patent discussion suggested adding an encoder to the rear end of the motor to calculate the speed. Although this theory is in line with the relationship between the rotational speed of the striking mechanism driven by the motor and the torque output of the tool, it does not distinguish the rotational speed of the tool locking process and the idling process. Because the knocking mechanism has speed when it is idling However, there is no speed difference ΔV, so there is no impulse Momentum=△V×m (the mass of the striking mechanism), so there is no torque output when idling . In order to distinguish the tool from being idling or locked, a strain gauge is added. Stacking bed frames increase the complexity of the mechanism and operation. Moreover, the installation of encoders, control circuits, strain gauges and other devices in the limited space of the tool must consider whether the volume, cost, and technology are feasible. Moreover, the vibration caused by the knocking mechanism will not cause the encoder to count unstable, and the invasive device can only be used for specially designed tools, and is not suitable for all pulsed tools.

Please refer to the Republic of China Patent Publication No. I509379, which discloses a torque control method for a pneumatic torque tool and a torque control device thereof. The torque control method is: using a torque control device connected between the air supply system and the pneumatic torque tool; under the preset operation and control conditions, respectively, driving with the highest working air pressure value and the lowest working air pressure value that can be normally operated. The pneumatic torque tool performs the verification of the output torque to obtain the maximum torque value and the minimum torque value; and establishes the relationship between the first air pressure and the corresponding torque value according to the obtained maximum working air pressure value and the minimum working air pressure value, and the maximum torque value and the minimum torque value. Curve; input any target torque value within the maximum and minimum torque values on the relationship curve to obtain a working pressure value corresponding to the target torque value to drive the pneumatic torque tool for locking operation and lock During the creping process of the solid operation, all operating and control conditions are monitored and controlled within the preset allowable variation range to achieve the purpose of controlling the output torque.

First, how do users define the tool's maximum working pressure (80 or 100 psi) and minimum operating pressure (10 or 25 psi)? What if the calibration torque curve is not the highest and lowest air pressure values that the tool specifies? Is it still possible to continue to find the operating pressure value corresponding to the target torque from the torsion curve by interpolation?

Secondly, the parameters of the operating conditions are not limited to the control pressure, and other methods such as controlling the flow rate and the pipe diameter are performed for a number of years. Changing the parameters of any operating conditions (including changing the pressure) can change the speed of the tapping mechanism, that is, changing the output torque of the tool. This is common sense and the experience of the tool user, and this is also true. The patent I509379 claims to correspond to the lowest output torque value TL of the tool with the lowest pressure value PL, and the highest pressure value PH The lowest output torque value TH should be used to verify that a pressure corresponds to the torque curve. When the tube diameter and flow rate are not considered different from the calibration, the power change caused by P=I×V causes the rotation speed to change (the motor wears out), and the second is also.

The biggest shortcoming of this patent I509379 is that the control method is open circuit. In fact, the parameters of the operating conditions are not static. In case the gas supply is insufficient due to the simultaneous use of many people, the pipe diameter changes or bends, resulting in insufficient flow, or Motor wear, air leakage, etc. cause the speed of the tool striking mechanism (tool output torque) to change without any feedback mechanism, thus causing the preset torque to be inconsistent with the locking result.

Furthermore, the patent I509379 uses a torque meter placed on the output end of the tool as the tool output torque corresponding to the highest and lowest air pressure values when verifying the air pressure vs. torque curve of the tool. It is not considered that the total inertia added by the connecting rod and the sleeve will affect the output torque of the final locking bolt of the pulse torque tool. Unlike the concept set forth in the present invention, the tool output torque corresponding to the same striking mechanism rotational speed is different from the pulse end torque at the sleeve end, and the two must be handled separately or the results may be greatly different.

In the discussion of the torsion force of the pulse torque tool and the formula derivation, the section [0026] of the above-mentioned patent I509379 lists F=m×a (linear acceleration) (Formula 1) Newton's second motion law, and T=I×α ( Angular acceleration) (Equation 2) is used in the whirling motion. Further, in the specification of the patent I509379 [0027] [0028], the calculation tool output torque mode is calculated from the angular acceleration to the rotational speed, but the method of detecting the rotational speed is not proposed in the specification of the patent I509379.

The ω in the formula I509379 derivation formula refers to the angular velocity (unit: radian/second) in the specification [0026], whereas the specification [0028] [0029] of the patent I509379 refers to the rpm (unit: rotation/minute) ), confused. Notice The difference between the two units is quite large (10 times).

Regardless of the speed rpm or angular velocity ω quoted in the formula to calculate the output torque of the pulse torsion tool, the tool must be locked to allow the striking mechanism to produce a tangential speed difference ΔV (maximum line speed drop) in each impact. To 0). Impulse momentum#m×△V, impact force F is the impulse to the impact time differential . This patent does not address how to distinguish between how to detect the speed of the tool in the locked state. The invention proposes to use the detection of the rotational speed of the pulse torque tool in the locked state to achieve the purpose of detecting the output torque of the tool, and to correct the insufficiency of the patent open circuit control.

The control parameters of the above-mentioned patent I509379 are limited to the air pressure, however, the parameters of the operating conditions are not limited to the control pressure, and other methods such as controlling the flow rate and the pipe diameter have been carried out for many years. Changing the parameters of any operating condition (including changing the pressure) can change the speed of the tapping mechanism, that is, change the output torque of the tool. Please refer to the third figure of the patent I509379, which claims that the minimum output torque value TL corresponding to the minimum pressure value PL and the lowest output torque value TH corresponding to the highest pressure value PH are verified. Torque curve. When the pipe diameter and flow rate are different from the check, the power change caused by P=I x V, and the motor wear also causes the change of the rotational speed, which is a disadvantage of the open circuit control.

In addition, the patent I509379 uses a torque meter set on the output end of the tool as the tool output torque corresponding to the highest and lowest air pressure values when verifying the air pressure and torque curves of the tool. It is not considered that the total inertia added by the connecting rod plus the sleeve will affect the output torque of the final locking bolt of the pulse torque tool, which is easy to cause the torque control. The method allows the error value to be too large and difficult to control. Therefore, it is necessary for the relevant industry to think further, how to improve and improve to be more in line with the use of the public.

In view of the above situation, the inventors invested a lot of time to study relevant knowledge, and compared various advantages and disadvantages, research and development of related products, and many experiments and tests, and finally introduced a torque monitoring of pulse torque tools. The method and its control device" improve the above-mentioned deficiency to meet the needs of the public.

The main object of the present invention is to provide a torsion force monitoring method and a control device thereof for a pulse type torque tool, and verify the output torque of a tapping mechanism vs. tool output torque during the locking process of the pulse torque tool through the input control parameter during verification. The curve of the characteristic curve and the number of revolutions of the operating parameter vs. the striking mechanism, and the number of revolutions of the striking mechanism is monitored during locking to achieve the purpose of controlling the output torque of the tool.

In order to achieve the above objects and effects, the present invention provides a torque monitoring method including the following steps: connecting a pulse torque tool to a power source, a torque controller, and a BPM detector, and driving in a locked state according to a pulse torque tool. And performing a verification operation by using a torque verification platform, and obtaining a shock threshold value (Threshold) stored in a storage unit in the BPM detector; verifying the number of revolutions of the tapping mechanism when the pulse torque tool is in the locked state The output torque of the tool is established, and a characteristic curve of the tapping force corresponding to the output torque of the tool is established and stored in a memory unit of the torque controller; when the pulse torque tool is locked in the locked state, the operating parameter corresponds to the knocking The number of revolutions of the mechanism is struck, and a relationship curve of the operation parameters corresponding to the number of revolutions of the striking mechanism is established and stored in the memory unit of the torque controller. Input the target torque to the controller when locking The controller calculates the number of revolutions of the striking mechanism corresponding to the target torque and the operating parameters and displays them on the liquid crystal panel by storing the above two curves; if there is a proportional valve, the operating parameters corresponding to the target torque are automatically adjusted, otherwise, according to the liquid crystal The panel displays the manual value adjustment operating parameters. During the locking operation, the BPM detector attached to the tool monitors the rotation speed of the striking mechanism when the locking state is locked. The comparison characteristic curve is used to calculate and determine whether the output torque of the locking working tool is within the allowable error range. In order to achieve the purpose of the closed loop control pulse tool torque output.

Further technical features of the present invention further include the steps of: connecting the BPM detector to the pulse torque tool, driving the pulse torque tool, and setting the vibration threshold value through the torque calibration platform, and storing the value in the BPM detector. The unit is further driven by the pulse torque tool for locking and using a torsion verification platform to verify the relationship between the number of revolutions of a percussive mechanism corresponding to the output torque of the pulse torsion tool and the relationship between the number of rotations of an operation parameter corresponding to the tapping mechanism The curve is stored in the memory unit of the BPM detector storage unit and the torque controller.

The further technical feature of the present invention further includes the following steps: the microprocessor in the torque controller compares whether the BPM value detected during the locking process is within the error range, and if the range is out of range, the warning device is alerted.

A further technical feature of the present invention, wherein testing the pulsed torque tool that has been verified includes the following steps: locking the pulse torque tool, and measuring the BPM value of the BPM detector to compare the number of revolutions of the tapping mechanism and Corresponding to the output torque curve of the striking mechanism, whether the BPM value and the corresponding tool output torque are consistent with the target torque.

A torque control device for a pulse torque tool, comprising: a proportional valve disposed between a gas source and a pulse torque tool, wherein the proportional valve receives an operating parameter corresponding to a torque setting and adjusts an operating parameter; The BPM detector is mounted on the pulse torque tool housing. The BPM detector is provided with an accelerometer to detect the vibration of the pulse torque tool in the locked state, calculate the number of vibrations per minute BPM, and convert to the speed of the tapping mechanism. Rpm; a torque controller, which is provided with a microprocessor, during verification: to verify the tool and establish a characteristic curve of the torque output of the tapping mechanism corresponding to the tool output, an operating parameter and the number of revolutions of the corresponding tapping mechanism Relationship curve; before locking: the torque controller converts the input target torque into the corresponding tapping mechanism speed and operating parameters are displayed on the panel and transmitted to the proportional valve; when locked: the torque controller is returned according to the BPM detector The value is compared with the stored characteristic curve to determine whether the torque output of the tool falls within the error range of the target torque, and immediately displays or alerts to close. The purpose of the road control; a storage unit, which is disposed in the BPM detector, the storage unit is configured to store the vibration threshold value obtained by the verification, the characteristic curve of the torque output of the tapping mechanism corresponding to the torque output of the tool, the operation parameter and the corresponding tapping mechanism. The relationship between the number of revolutions; a memory unit, which is disposed in the microprocessor to store the vibration threshold value obtained by the verification, the characteristic curve of the torque output of the tapping mechanism corresponding to the output torque of the tool, the operation parameter and the number of revolutions of the corresponding tapping mechanism Relationship lines.

According to a further feature of the present invention, the torque controller can be wearable and transmit information to the proportional valve by wirelessly transmitting data.

Therefore, the present invention can be said to be a practical and progressive invention, which is quite worthy of promotion by the industry and is publicized to the public.

1‧‧‧pulse torque tool

2‧‧‧BPM detector

21‧‧ ‧ Acceleration regulations

3‧‧‧Torque controller

4‧‧‧Torque verification platform

5‧‧‧ proportional valve

The first figure is a schematic diagram of the BPM detector of the present invention incorporated into a pulse torque tool.

The second figure is a schematic diagram of the BPM detector of the present invention detached from the pulse torque tool.

The third figure is a perspective exploded view of the BPM detector of the present invention.

The fourth figure is a schematic diagram of the torque test of the pulse torque tool of the present invention.

The fifth drawing is a schematic view of the operation of an embodiment of the present invention.

The sixth figure is a characteristic diagram of the pulse torque tool of the present invention.

The seventh graph is a graph of the operating conditions of the present invention corresponding to the rotational speed.

The eighth figure is a test data chart of the present invention.

In order to clearly illustrate the above objects and effects of the present invention, the features and effects of the present invention will be described in detail with reference to the accompanying drawings. Please refer to the first to eighth figures of the drawing. The figure shows a torque control method, which includes the following steps: during calibration: a stable power source (which can be a gas source or a power source) and a proportional valve are connected from the system. The pulse torque tool 1 is connected to a BPM detector 2 (which can be combined with the torque controller 3) in the outer casing of the pulse torque tool 1 to drive the tool in a locked state on a torque calibration platform 4, pre-calibrated Check out a Threshold threshold (and if the detected value is below the previously set vibration threshold, it is judged to be idling) and stored in the BPM detector 2 . Secondly, corresponding to a specific condition (pressure, flow), the number of tapping revolutions of the pulse torque tool 1 in the locked state is verified to correspond to the output torque of the tool, and a characteristic curve of the torque output of the tapping mechanism corresponding to the tool is established. An operating parameter corresponds to the number of revolutions of the striking mechanism; when the bolt is locked: the input is to be locked The target torque is applied to the torque controller 3, and the relationship between the number of revolutions of the striking mechanism and the corresponding tool output torque and the operating parameters and the number of revolutions of the corresponding striking mechanism are determined according to the previous steps to obtain a torque operation corresponding to the target. The parameter is adjusted by the proportional valve 5 to drive the pulse torque tool 1 and monitor whether the torque output of the tool is within the target torque error range through the BPM detector 2, thereby achieving the purpose of controlling the torque.

Torque at the output of the tool:

The maximum tangential speed of the tapping radius of the striking mechanism:

The initial tangential velocity of the gyration radius of the striking mechanism (locking state): Vi=0---(Equation 3)

Knocking mechanism tangential speed difference (knocking mechanism gyro radius * angular velocity):

Bring the tangential speed difference dV into (Equation 1):

The principle of the present invention is explained below. The output torque of the pulse torsion tool 1 in the locked state is determined by the highest angular velocity ω before the impact mechanism strikes. The average angular velocity of each impact ring can be reasonably calculated = 1/2 ω (maximum Angular velocity), the speed of the striking mechanism .

It is not easy to measure the maximum angular velocity ω and the impact time dt before impact. There are various methods for measuring the rotational speed rpm of the striking mechanism, including installing an encoder at the rear end of the motor. Wait. The BPM detector 2 of the present invention is fixed to the outer casing of the striking mechanism, and sets the vibration threshold value to measure the rotational speed of the locked state in a non-invasive manner.

Dt is only the impact time when the tangential speed of the striking mechanism is reduced from the maximum value to 0 in the locked state, and is not the acceleration time of the striking mechanism from 0 rotation speed to the highest angular speed ω in the locked state. Different materials of the striking mechanism absorb the impact time dt slightly different, but the difference is not considered to be a constant C, the moment of inertia of the striking mechanism I = m × (r ² ), brought into the formula 5, the pulse torque tool 1 output torque T = I × ω × C = J × ω.

The present invention indicates that the output torque T = J x ω of the pulse torsion tool 1 in the locked state is related to the rotational speed of the striking mechanism. This correlation provides the theoretical basis of the characteristic curve of the output torque of the tapping mechanism corresponding to the tool disclosed in the present invention: the rotational torque rpm (or angular velocity ω) of the pulse torque tool 1 in the locked state, within a certain range and knocking The pulse wave torque T output by the striking mechanism is proportional, which is the characteristic of the pulse torque tool 1.

Under different operating conditions (flow, pressure, pipe diameter, motor state), the pulse torque tool 1 directly affects the rotational speed rpm of the tool in the locked state (the relationship between the operating parameters disclosed in the present invention and the number of revolutions of the corresponding striking mechanism) curve). Through the relationship between the torque output of the tapping mechanism and the tool output torque, the purpose of monitoring the output torque can be achieved by monitoring the rotational speed rpm of the locking state. Adjusting the operating conditions (flow, pressure, pipe diameter, motor state) according to the relationship between the operating parameters and the number of revolutions of the striking mechanism, to control the rotational speed rpm of the striking mechanism when the locking state is controlled, and then corresponding to the number of revolutions of the striking mechanism The tool outputs the characteristic curve of the torque, thereby achieving the purpose of controlling the output torque of the tool.

Since the prior art uses a torque meter plus a solenoid valve to cut off the air supply and cannot accurately control the output torque of the pulse torque tool 1, the present invention utilizes the control pulse torque tool 1 under specific operating parameters (pressure, flow, pipe diameter, motor) And the tapping mechanism) The tool's maximum output torque (or ultimate torque) to lock the bolt. Since the power supplied to the air motor is P=I×V, when the bolt is in the locked state (non-output shaft idling state), the power P drives the knocking mechanism to rotate from zero Vi=0 to the maximum angular velocity ω, at this time, knocking The maximum tangential velocity of the striking mechanism is Vt = 2Pi × r × ω. The speed difference ΔV=Vt-Vi=2Pi×r×ω. Knocking mechanism impulse moment^=m×△V, strength . The instantaneous torque T=r×F=r ² ×2Pi×ω=I×ω×C=J×ω.

The above formula shows that the pulse torsion force T output by the pulse torque tool 1 is proportional to the highest angular velocity ω in the locked state, and is also proportional to the average rotational speed rpm in the locked state (the knocking mechanism number of the present invention corresponds to the output torque characteristic of the tool) curve).

The power P=I×V drives the knocking mechanism to rotate, and the control operating parameters (pressure, flow, pipe diameter, motor and knocking mechanism) can control the highest angular velocity ω of the striking mechanism in the bolt locking state, which is also proportional to the lock. The rotational speed rpm in the solid state (the relationship between the operating parameters disclosed in the present invention and the number of revolutions of the corresponding striking mechanism).

However, when the pulse torque tool is in the non-locking state (including idling), the tool output shaft is interlocked with the striking mechanism. The maximum tangential velocity Vt=2Pi×r×ω in each revolution circle does not instantaneously drop to zero. In other words, there is a tangential speed V, but there is no speed difference ΔV=0. Even if the total inertia m (idle) = m1 (knocking mechanism) + m2 (output shaft) + m3 (sleeve connecting rod) is larger than the inertia of the locking mechanism of the bolting mechanism, the speed difference ΔV is small enough At 0, the impulse moment produced is nearly zero. At this time, the pulse torque tool 1 There is no output torque (or a small torque output).

How to determine the rotation speed of the striking mechanism is that the pulse torque tool 1 is in a locked state or a non-locking state, and the torque torque tool 1 has an output torque. The invention proposes to detect the BPM (the number of vibrations per minute) of the striking mechanism in a non-invasive manner, and through the pre-verified vibration threshold Threshold, to determine whether the tool is in a locked state, and The BPM is converted into a rotational speed rpm for comparing the characteristic curve of the output torque of the tool corresponding to the previously verified and stored tapping mechanism number. In order to monitor the output torque of the pulse torsion tool 1 corresponding to the rotation speed in the locked state (the torque of the output of the pulse torque tool 1 is different from the torque of the rod sleeve end). The present invention is a non-invasive torque (or force) monitoring method and control device, particularly suitable for pulsed tools. For a complete closed loop system, the output torque of the pulse torque tool 1 can be fed back in time. The control operating parameter condition corresponds to the rotational speed of the pulse torque tool 1 in the locked state (the relationship between the operating parameter and the number of revolutions of the corresponding striking mechanism), and the monitoring of the pulse torque tool by the non-invasive BPM detector 2 The rotational speed in the locked state can achieve the purpose of closed loop torque control by comparing the characteristic curve of the previously outputted knocking mechanism rotation number corresponding to the tool output torque. It can instantly detect the influence of the torque on the output of the pulse torque tool 1 when the operating conditions are changed, and can also greatly reduce the influence of the locking time (3 seconds or 5 seconds) on the torque of the bolt.

Referring to the first to fifth figures, the BPM detector 2 is adhered to the pulse torque tool 1, respectively, and the pulse torque tool 1 is driven to lock the joint state, and the vibration is set through the torque verification platform 4. After the threshold value is stored in the storage unit of the BPM detector 2; the pulse torque tool 1 is further driven to lock the joint and utilize the torque check The platform 4 verifies the characteristic curve of the output torque of the tapping mechanism corresponding to the tool in the locking state, and the relationship curve of the operating parameter corresponding to the number of revolutions of the striking mechanism and stores it in the storage unit and the torque controller of the BPM detector 2 Memory unit. The microprocessor provided in the torque controller 3 compares whether the BPM value detected during the locking and binding process falls within the error range, and if the BPM value falls within the error range, the green light is released by a warning device, and the The error range warning device presents a red light warning.

Referring to the first to fifth figures, the torque control device of the present invention is connected between the power source system and the pulse torque tool 1 and includes: a BPM detector 2, which is applied with an acceleration gauge 21 Detecting, by sensing the number of vibrations per minute BPM (Beats Per Minute) is used to calculate the rpm of the striking mechanism rpm (Rotations Per Minute); a torque controller 3, which has a micro The processor checks the pulse torque tool 1 and establishes a characteristic curve of the torque output of the tapping mechanism corresponding to the tool, and the relationship between the operating parameter and the number of revolutions of the corresponding striking mechanism, and is stored in the torque controller 3 In the processor, the verification procedure is completed. When the lock is locked, the target torque is input to the torque controller 3, and the torque controller 3 calculates the number of revolutions of the striking mechanism corresponding to the target torque by the stored two curves, and the operation parameters are displayed on the liquid crystal panel of the torque controller 3 . If the proportional valve 5 is equipped, the operating parameter corresponding to the target torque is automatically adjusted. Otherwise, the liquid crystal panel of the torque controller 3 displays the manual value adjustment operating parameter. During the locking operation, the BPM detector 2 fixed on the pulse torque tool 1 monitors the rotation speed of the striking mechanism during the locking state, and calculates and discriminates the locking operation according to the previously verified and stored characteristic curve. Whether the tool output torque is controlled within the allowable error range and displayed in red or green light indicates the purpose of controlling the torque output.

When the pulse torque tool 1 has no abnormal change under the control operating conditions, the performance is stable. Moreover, in the case where the closed loop control does not require strict requirements during the bolt locking process, it may be considered that the BPM detector 2 is not required to be fixed on the outer casing of the pulse torque tool 1 for immediate BPM detection. At this time, it is only necessary to install the BPM detector 2 in the outer casing of the pulse torsion tool 1 before the start of the handover work or the QC quality inspection of the different users, and perform several simple test actions under several different operating conditions to ensure The output torque of the pulse torque tool 1 is controlled within the error range of the set target torque. This is a tool test before the open circuit lock.

In addition, if the user does not pull the positive and reverse switches on the pulse torque tool 1 to the position when testing or locking the bolt, the pulse torque tool 1 is not fully circulated to the tool due to its air pressure flow or the like when the pulse torque tool 1 is actuated. As a result, the torque outputted by the tool does not reach the originally set standard. At this time, the BPM detector 2 transmits the detected value to the microprocessor, thereby notifying the user that there is an abnormal state, so that the user can This abnormal value is checked to see if the pulse torque tool 1 has a problem with that operation.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the invention in any way, so that any modifications relating to the present invention are made in the spirit of the same invention. And the changer, other types that can be implemented and have the same effect, should still be included in the scope of the intention of the present invention.

In summary, the "torque force monitoring method and control device of the pulse torque tool" of the present invention is practically and cost-effectively and fully meets the needs of industrial development, and the disclosed structural invention is also unprecedented. Innovative structure, so its "novelty" should be undoubtedly considered, and the invention can be more effective than the conventional structure. Advance, therefore also has "progressiveness", which fully complies with the requirements of the application requirements for invention patents in China's Patent Law, is to file a patent application in accordance with the law, and invites the bureau to review it early and give affirmation.

Claims (7)

A torque monitoring method for a pulse torque tool includes the following steps: connecting a pulse torque tool to a power source, a torque controller, and a BPM detector, driving in a locked state according to a pulse torque tool and verifying the platform with a torque Performing a verification operation to obtain a shock threshold value (Threshold) stored in a storage unit in the BPM detector; verifying that the torque of the pulse torque tool in the locked state corresponds to the output torque of the tool and establishing A tapping mechanism corresponds to a characteristic curve of the output torque of the tool and is stored in a memory unit of the torque controller; when the pulse torque tool is locked, the operating parameter corresponds to the number of revolutions of the tapping mechanism, and is established. An operating parameter corresponds to the relationship between the number of revolutions of the striking mechanism and is stored in the memory unit of the torque controller. According to the torque monitoring method of claim 1, further comprising the steps of: connecting the BPM detector to the pulse torque tool, driving the pulse torque tool and setting the vibration threshold through the torque calibration platform, and storing The storage unit of the BPM detector; the pulse torque tool is further driven to lock and the torque calibration platform is used to verify that the number of revolutions of the tapping mechanism corresponds to the characteristic torque of the pulse torque tool output torque (Characteristic curve) and an operation parameter corresponding to The relationship between the number of revolutions of the tapping mechanism and the memory unit of the BPM detector storage unit and the torque controller. According to the torque monitoring method described in claim 1, the method further includes the following steps: the microprocessor in the torque controller compares whether the detected BPM value during the locking process is within the error range, and if it is out of range A warning is issued by a warning device. According to the torque monitoring method described in claim 2, the method further includes the following steps: the microprocessor in the torque controller compares whether the detected BPM value during the locking process is within the error range, and if it is out of range A warning is issued by a warning device. The torque monitoring method according to any one of claims 1 to 4, wherein the testing of the pulsed torque tool that has been verified includes the following steps: locking the pulse torque tool and BPM The detector measures the BPM value as a function of the relationship between the number of revolutions of the striking mechanism and the output torque of the corresponding striking mechanism, and whether the BPM value and the corresponding tool output torque are consistent with the target torque. A torque control device for a pulse torque tool, comprising: a proportional valve disposed between a gas source and a pulse torque tool, wherein the proportional valve receives an operating parameter corresponding to a torque setting and adjusts an operating parameter; The BPM detector is mounted on the pulse torque tool housing. The BPM detector is provided with an accelerometer to detect the vibration of the pulse torque tool in the locked state, calculate the number of vibrations per minute BPM, and convert to the speed of the tapping mechanism. Rpm; a torque controller, which is provided with a microprocessor, during verification: to verify the tool and establish a characteristic curve of the torque output of the tapping mechanism corresponding to the tool output, an operating parameter and the number of revolutions of the corresponding tapping mechanism Relationship curve; before locking: the torque controller converts the input target torque into the corresponding tapping mechanism speed and operating parameters are displayed on the panel and transmitted to the proportional valve; when locked: the torque controller is returned according to the BPM detector The value is compared with the stored characteristic curve to determine whether the torque output of the tool falls within the error range of the target torque, and immediately displays or alerts to close. Passage control purposes; a storage unit, provided in the BPM detector, the storage unit storing parity lines taken The vibration threshold value, the number of revolutions of the striking mechanism correspond to the characteristic curve of the output torque of the tool and the relationship between the operating parameters and the number of revolutions of the corresponding striking mechanism; a memory unit, which is set in the microprocessor, stores the vibration obtained by the verification The threshold value and the number of revolutions of the striking mechanism correspond to the characteristic curve of the output torque of the tool and the relationship between the operating parameters and the number of revolutions of the corresponding striking mechanism. The torque control device of claim 6, wherein the torque controller is wearable and transmits information to the proportional valve by wirelessly transmitting data.