TW201328827A - Torque control device for an impact type pneumatic torsion spanner - Google Patents

Abstract

This invention discloses a torque control device for an impact type pneumatic torsion spanner, which comprises an impact type pneumatic torsion spanner and a torque control device. The impact type pneumatic torsion spanner has an input port and an output port. The torque control device is comprised of a compressed air supply path, an input control unit, an output control unit and a processing unit. The compressed air supply path is connected to the input control unit. The input control unit is moveable and is connected to the input port of the impact type pneumatic torsion spanner. The output control unit is moveable and connected to the output port of the impact type pneumatic torsion spanner. The processing unit electrically connects to the output control unit. The processing unit according to a preset value and a verified value controls the output control unit to shut off the compressed air output.

Description

Torque control device for impact type pneumatic torque wrench

The present invention relates to a torque control device, and more particularly to a torque control device for an impact type pneumatic torque wrench.

Currently, pneumatic impact tools, such as impact pneumatic torque wrenches, are well known in the art. The torque control of the power locking tool has the effect of adjusting the applied locking torque by the intake pressure or the flow rate, or the spring tension and the cam setting of the adjusting device in the tool output mechanism, when the locking torque arrives, The spring in the mechanism then jumps or makes a sound to remind the user that the preset torque value has been reached; or the torque is caused by the built-in or externally attached torque sensor. The sensor signal changes to determine the torque level and to perform torque control.

The design of pneumatic impact tools in the prior art, due to the compressibility of the compressed gas, is often affected by the use of various air pressure equipment or tools in the air pressure pipeline system, which directly affects the stability of the supply pressure. The size of the tool is difficult to control. In particular, the hammering mechanism that is mounted on the front end of the pneumatic impact tool, which acts on the torque generated by the tool output shaft and the length of the hammering time, and the soft and hard structure of the lock, cannot always be presented in a linear relationship. The basis for torque control. Therefore, the industry can only find another way, and try to use a pneumatic motor to drive a hydraulic motor for indirect transmission, or a pneumatic motor to drive a gear reduction mechanism, etc., which can easily obtain output torque under a certain pressure. A linear relationship with the lock time. Further, by using a torque sensor installed in or outside the tool to sense the signal change of the torque sensor caused by the torque when the lock is locked, the torque is determined and torque control is performed thereby. Among these conventional methods, the latter has the highest control precision, but it has the disadvantages of slow working speed, high price, and support by a reaction arm during operation. The former is lower in price, but there are also long-term continuous operations, which will increase the temperature of the oil, which will affect the accuracy of the twisting control and the oil leakage and maintenance problems common to the hydraulic system. Therefore, the industry has long been hoping to achieve an impact pneumatic torque wrench with high efficiency, low cost, easy maintenance and an acceptable range of torque control. The current work efficiency in production operations is an issue that cannot be delayed.

In view of the foregoing, the inventors of the present invention have conceived and designed a torque control device for an impact type pneumatic torque wrench to improve the lack of the prior art, thereby enhancing the industrially effective use.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a torque control device for an impact type pneumatic torque wrench to solve the problem that the impact type pneumatic torque wrench can not effectively control the output torque in the prior art.

In accordance with the purpose of the present invention, a torque control device for an impact type pneumatic torque wrench is provided, comprising: an impact type pneumatic torque wrench and a torque control device. The impact type pneumatic torque wrench has an input interface and an output interface. The torque control device comprises: a compressed gas supply channel, an input control unit, an output control unit and a processing unit. Wherein, the compressed gas supply passage supplies a compressed gas. The input control unit is connected to the compressed gas supply passage and is movably connected to the input interface of the impact pneumatic torque wrench to stably supply a predetermined pressure of compressed gas to drive the motor of the impact pneumatic torque wrench. The output control unit is movably coupled to the output interface of the impact pneumatic torque wrench to detect and control changes in the exhaust pressure of the compressed gas during the locking process. The processing unit is electrically connected to the output control unit, and the processing unit controls the output control unit to turn off the compressed gas output at an appropriate output time according to a preset value and a previously verified data to achieve the purpose of torque control.

The torque control device further includes a plurality of setting units, a logic controller, a pressure sensor, a pressure regulator and a timer. The setting unit sets a preset value or a type or mode of at least one locking operation. The logic controller is disposed within the torque control device and memorizes at least one type or mode of locking operation. The pressure sensor is disposed in the torque control device to sense the pressure of the input compressed gas, the actual working pressure of the impact type pneumatic torque wrench, or detect the change of the output pressure of the compressed gas during the locking process. A pressure regulator is disposed at the inlet of the torque control device to adjust the pressure of the compressed gas based on the type or mode of at least one locking operation, the pressure of the compressed gas sensed by the pressure sensor, or a combination thereof. The timer records or counts the time of each operation of the impact pneumatic torque wrench according to one of the types or modes of at least one locking operation.

The type or mode of the at least one locking operation includes a length of locking, two-stage locking, locking times or the preset value.

The preset value includes a time value or a torque value.

Wherein, when the output control unit turns off the state of the compressed gas output, the pressure in the impact type pneumatic torque wrench and the pressure in the compressed gas supply passage are in an equilibrium state.

In addition, according to the purpose of the present invention, a torque control method for an impact type pneumatic torque wrench includes the following steps:
Connecting a compressed gas supply passage to an input control unit;
The input control unit is movably connected to one of the input interfaces of an impact pneumatic torque wrench to supply a stable compressed gas to the impact pneumatic torque wrench;
Connecting an output control unit of a torque control device to one of the output interfaces of the impact pneumatic torque wrench;
Applying an impact pneumatic torque wrench to a workpiece to lock the workpiece to the object; and controlling the output control unit to turn off the compressed gas output by a processing unit according to a predetermined value and a previously verified data.

The preset value further includes a first preset value and a second preset value; the workpiece further includes a first workpiece and a second workpiece; and the torque control method further comprises the following steps:
Entering or selecting one of a first preset value, a second preset value, a type or mode of at least one locking operation, or a combination thereof;
Applying an impact pneumatic torque wrench to the first workpiece;
And controlling, by the processing unit, the output control unit to turn off the compressed gas output according to the first preset value and the previously verified data, so that the first workpiece is pre-locked to the object;
Applying an impact pneumatic torque wrench to the second workpiece;
Controlling, by the processing unit, the output control unit to turn off the compressed gas output according to the first preset value and the previously verified data, so that the second workpiece is pre-locked to the object;
Applying an impact pneumatic torque wrench to the first workpiece;
Controlling the output control unit to close the compressed gas output by the processing unit according to the second preset value and the previously verified data to lock the first workpiece to the object;
Applying an impact pneumatic torque wrench to the second workpiece; and controlling the output control unit to close the compressed gas output by the processing unit according to the second preset value and the previously verified data to lock the second workpiece to the object.

Among them, the torque control method further includes the following steps:
Sensing the pressure of the input compressed gas by the pressure sensor, the actual working pressure of the impact type pneumatic torque wrench or the output change of the compressed gas during the locking process; and the at least one locking operation by the pressure regulator The pressure of the compressed gas is adjusted by the type, mode, pressure of the compressed gas sensed by the pressure sensor, or a combination thereof.

According to the above, the torque control device of the impact type pneumatic torque wrench according to the present invention may have one or more of the following advantages:
(1) The torque control device can be movably connected to the output interface of the impact pneumatic torque wrench by the output control unit to control the discharge of the compressed gas, thereby improving the stability of the impact pneumatic torque wrench when starting.
(2) The torque control device can be used by the torque control device, thereby improving work efficiency during assembly and saving work time during assembly.

Hereinafter, the embodiment of the torque control device for the impact type pneumatic torque wrench according to the present invention will be described with reference to the related drawings. For the sake of understanding, the same components in the following embodiments are denoted by the same reference numerals.

Please refer to FIG. 1 , which is a schematic diagram of the torque control device of the impact type pneumatic torque wrench of the present invention. In the figure, the torque control device 1 is applied to an impact pneumatic torque wrench 3, the main purpose of which is any impact pneumatic tool, whether with or without a twist control device, as long as the torque control device 1 is externally attached Torque locking tool with twist control function. The impact type pneumatic torque wrench 3 has an input interface 31 and an output interface 32. The torque control device 1 includes a compressed gas supply passage 11, an input control unit 12, an output control unit 13, and a processing unit 14. The compressed gas supply passage 11 is movably connected to the input control unit 12 and supplies the compressed gas 4. The input control unit 12 is movably coupled to the input interface 31 of the impact type pneumatic torque wrench 3 to stably supply a predetermined pressure of the compressed gas 4 to drive the operation of the motor of the impact type pneumatic torque wrench 3. The output control unit 13 is movably coupled to the output interface 32 of the impact pneumatic torque wrench 3 to detect and control the change in exhaust pressure of the compressed gas 4 during the locking process. The processing unit 14 is electrically connected to the output control unit 13, and the processing unit 14 controls the output control unit 13 to turn off the output of the compressed gas 4 at an appropriate output time according to a preset value 141 and a previously verified data, to achieve torque control. The processing unit 14 can be a Microprocessor Control Unit, a Central Processing Unit (CPU) or a Micro-Processing Unit, and the microprocessor controller is used as an embodiment. . Wherein, the source of the compressed gas 4 in the compressed gas supply passage 11 can be supplied by a compressor (such as an air compressor or a gas compressor, etc.), and the compressed gas supply passage 11 can be first introduced into the torque control device 1 from the compressor end. The input interface 31 of the impact type pneumatic torque wrench 3 is connected.

Please refer to FIG. 2, which is a schematic view of a first embodiment of a torque control device for an impact type pneumatic torque wrench of the present invention. In this embodiment, the arrangement of the other components is similar to the above except for the following description, and details are not described herein again. In the figure, the torque control device 1 further includes a pressure regulator 15, a pressure sensor 16, a logic controller 17, a timer 18, and a plurality of setting units 19. A pressure regulator 15 is provided at the inlet of the torque control device 1 for regulating the pressure of the compressed gas 4. The pressure sensor 16 is disposed in the torque control device 1 for sensing the pressure of the input compressed gas 4, the actual working pressure of the impact type pneumatic torque wrench 3, or the output change of the compressed gas 4 during the locking process. The logic controller 17 is disposed within the torque control device 1 for memorizing the type 1711 or mode 1712 of at least one of the locking operations 171. The timer 18 records the time each time the impact type pneumatic torque wrench 3 is operated. The setting unit 19 sets the preset value 141 or the type or mode 171 of at least one locking operation. In actual use, the user may select a type 1711 or a mode 1712 of at least one locking operation 171 in the logic controller 17 by using a plurality of setting units 19, or may input only the torque value required to be locked, when the input torque The value falls on the time required for all of the stored sets of torques of the logic controller 17 to correspond to it, and is set to the preset value 141 of the processing unit 14. At this time, the pressure sensor 16 senses whether the entered air pressure value is within a predetermined allowable range. If the allowable range is exceeded, the warning signal can be sent by a warning unit (not shown), and the user The pressure regulator 15 can then be used to adjust the pressure to within the allowable range until the warning signal is stopped. The torque control device 1 further includes a display module 20 for displaying related information to the user to facilitate user selection or setting.

Subsequently, the user sets the impact type pneumatic torque wrench 3 on the workpiece to be locked, and starts the impact type pneumatic torque wrench 3 to perform the work; when the impact type pneumatic torque wrench 3 is activated, the processing unit 14 provides the preset value 141. To the timer 18, the timer 18 starts counting down and at the end of the countdown, the countdown end message is fed back to the processing unit 14 to cause the output control unit 13 to turn off the discharge of the compressed gas 4, that is, to complete the locking operation. At this time, the pressure in the impact type pneumatic torque wrench 3 and the pressure in the compressed gas supply passage 11 are in an equilibrium state, so as to improve the stability at the next startup.

Please refer to FIG. 3, which is a schematic view showing a second embodiment of the torque control device for the impact type pneumatic torque wrench of the present invention. In this embodiment, the arrangement of the other components is similar to the above except for the following description, and details are not described herein again. The torque control device 1 can also be applied to a method that is familiar to those skilled in the art and that is pre-locked and then locked one by one. As shown in the figure, the preset value 141 may further include a first preset value 1411 and a second preset value 1412. In actual use, for example, the bolts and nuts of the automobile tire are locked, and the setting unit can be utilized by the user. 19: Selecting the type 1711 or the mode 1712 of the at least one locking operation 171 in the logic controller 17, if the torque value required for the different types of the vehicle is locked and the one-stage or two-stage locking, the logic controller 17 is The selected category 1711 or mode 1712 sets the time of its pre-lock to the first preset value 171 (eg, the start-to-end time is 0.8 seconds), and sets the lock time to the second preset value 1712 (eg, The start-to-end time is 2 seconds); at this time, the pressure sensor 16 senses that the entering pressure value is within a preset allowable range, and the user applies the impact-type pneumatic torque wrench 3 to a first workpiece 51, and starts When the impact type pneumatic torque wrench 3 is used, the processing unit 14 provides the preset value 141 to the timer 18, and the timer 18 starts counting down and returns the countdown end message to the processing unit 14 when the countdown ends, so that the output control unit 13 is turned off. Compressed gas 4 The discharge is completed, that is, the pre-locking operation of the first workpiece 51 to the object 5 is pre-locked.

After repeating the above steps, the second workpiece 52 is pre-locked to the object 5, and after repeating the predetermined number of times (such as 2 times or 4 times, etc.), the above-mentioned locking operation is resumed and completed. It is worth noting that in the pre-locking operation, the workpiece to be locked is locked to the surface of the object 5 to make it face-to-face contact, and the purpose is to enable the subsequent locking operation to be locked. The torque is more precise.

In this embodiment, the components of the other components are similar to those of the first embodiment except for the above description, and details are not described herein again.

Please refer to FIG. 4, which is a first step diagram of the torque control method of the impact type pneumatic torque wrench of the present invention. As shown in the figure, the torque control method of the impact type pneumatic torque wrench of the present invention comprises the following steps:
(S41) connecting a compressed gas supply passage to an input control unit;
(S42) connecting the input control unit to an input interface of an impact pneumatic torque wrench to supply a stable compressed gas to the impact pneumatic torque wrench;
(S43) connecting an output control unit of one torque control device to one of the output interfaces of the impact pneumatic torque wrench;
(S44) applying an impact type pneumatic torque wrench to a workpiece to lock the workpiece to the object; and (S45) controlling the output control unit to be closed by a processing unit according to a predetermined value and a previously verified data Compressed gas output.

Please refer to FIG. 5, which is a second step diagram of the torque control method of the impact type pneumatic torque wrench of the present invention. The preset value further includes a first preset value and a second preset value; the workpiece further includes a first workpiece and a second workpiece; as shown, the torque control method may be after the step (S43), and further includes the following step:
(S41) connecting a compressed gas supply passage to an input control unit;
(S42) connecting the input control unit to an input interface of an impact pneumatic torque wrench to supply a stable compressed gas to the impact pneumatic torque wrench;
(S43) connecting an output control unit of one torque control device to one of the output interfaces of the impact pneumatic torque wrench;
(S51) inputting or selecting one of a preset value, at least one type or mode of the locking operation, or a combination thereof;
(S52) applying an impact pneumatic torque wrench to the first workpiece;
(S53) controlling the output control unit to close the compressed gas output by the processing unit according to the first preset value to pre-lock the first workpiece to the object;
(S54) applying an impact pneumatic torque wrench to a second workpiece;
(S55) controlling the output control unit to close the compressed gas output by the processing unit according to the first preset value and the previously verified data to pre-lock the second workpiece to the object;
(S56) applying an impact pneumatic torque wrench to the first workpiece;
(S57) controlling the output control unit to close the compressed gas output by the processing unit according to the second preset value and the previously verified data to lock the first workpiece to the object;
(S58) applying an impact type pneumatic torque wrench to the second workpiece; and (S59) controlling the output control unit to close the compressed gas output by the processing unit according to the second preset value and the previously verified data, so as to make the second The workpiece is locked to the object.

Please refer to FIG. 6 , which is a third step diagram of the torque control method of the impact type pneumatic torque wrench of the present invention. As shown in the figure, the torque control method may further include the following steps between step (S51) and step (S52):
(S61) sensing, by the pressure sensor, the pressure of the input compressed gas, the actual working pressure of the impact type pneumatic torque wrench or the output change of the compressed gas during the locking process; and (S62) according to at least the pressure regulator The pressure of the compressed gas is adjusted by one of the types or modes of the locking operation, the pressure of the compressed gas sensed by the pressure sensor, or a combination thereof.

It is worth mentioning that when using the torque control device of the impact type pneumatic torque wrench, a pre-calibrated data can be obtained by a specific calibration method to further ensure the accuracy of the torque control, and the impact type After the pneumatic torque wrench is equipped with the torque control device, the type or operation mode of each type of locking operation can be performed to pre-store or record the relationship between the verified locking torque value and the corresponding locking time. In the logic controller, as a basis for controlling torque during operation.

Please refer to Fig. 7, which is a step diagram of the torque control verification method of the impact type pneumatic torque wrench. As shown in the figure, the calibration method of the torque control device using the impact type pneumatic torque wrench of the present invention comprises the following steps:
(S71) Press the check button;
(S72) input the mode or type of the job to be verified;
(S73) setting the pressure and the unit of use at the entrance of the calibration;
(S74) inputting the number of sets of predetermined verifications;
(S75) setting the time from the start to the end of each group number;
(S76) The actual torque value of the workpiece is measured using a standard torque sensor; and (S77) is stored in the logic controller.

In the above verification method, the more the number of predetermined calibration groups or the denser the interval of the calibration interval, the higher the controllable torque accuracy.

The detailed description and embodiment of the torque control method of the impact type pneumatic torque wrench of the present invention have been described above in connection with the torque control device method of the impact type pneumatic torque wrench of the present invention, and will not be described here for the sake of brevity.

In summary, the output control unit is movably connected to the output interface of the impact pneumatic torque wrench to detect and control the change of the exhaust pressure of the compressed gas during the locking process, and improve the impact of the impact pneumatic torque wrench when the brake is stopped. The reaction speed; through the use of preset values (such as the lock time) for the purpose of torque control, the use of the impact type pneumatic torque wrench torque control device can effectively improve the efficiency of assembly between components.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1. . . Torque control device

11. . . Compressed gas supply channel

12. . . Input control unit

13. . . Output control unit

14. . . Processing unit

141. . . default value

1411. . . First preset value

1412. . . Second preset value

15. . . Pressure regulator

16. . . Pressure sensor

17. . . Logic controller

171. . . Locking operation

1711. . . kind

1712. . . mode

18. . . Timer

19. . . Setting unit

20. . . Display module

3. . . Impact pneumatic torque wrench

31. . . input interface

32. . . Output Interface

4. . . compressed gas

5. . . object

51. . . First workpiece

52. . . Second workpiece

S41~S45. . . Steps for usage

S51~S59. . . Steps for usage

S61~S62. . . Steps for usage

S71~S77. . . Calibration step

1 is a schematic view of a torque control device for an impact type pneumatic torque wrench of the present invention;
2 is a schematic view showing a first embodiment of a torque control device for an impact type pneumatic torque wrench of the present invention;
Figure 3 is a schematic view showing a second embodiment of the torque control device for the impact type pneumatic torque wrench of the present invention;
Figure 4 is a first step diagram of the torque control method for the impact type pneumatic torque wrench of the present invention;
Figure 5 is a second step diagram of the torque control method of the impact type pneumatic torque wrench of the present invention;
Fig. 6 is a third step diagram of the torque control method of the impact type pneumatic torque wrench of the present invention; and Fig. 7 is a step diagram of the torque control verification method of the impact type pneumatic torque wrench of the present invention.

1. . . Torque control device

11. . . Compressed gas supply channel

12. . . Input control unit

13. . . Output control unit

14. . . Processing unit

141. . . default value

3. . . Impact pneumatic torque wrench

31. . . input interface

32. . . Output Interface

4. . . compressed gas

Claims (10)

A torque control device for an impact type pneumatic torque wrench, comprising:
An impact type pneumatic torque wrench has an input interface and an output interface; and a torque control device comprising:
a compressed gas supply passage for supplying a compressed gas;
An input control unit is coupled to the compressed gas supply passage and movably connected to the input interface of the impact pneumatic torque wrench to stably supply the compressed gas of a predetermined pressure to drive the impact pneumatic torque wrench to operate ;
An output control unit movably connected to the output interface of the impact pneumatic torque wrench to detect and control a change in exhaust pressure of the compressed gas during the locking process; and a processing unit electrically connected to the And outputting the control unit, and controlling the output control unit to turn off the compressed gas output according to a preset value and a previously verified data. The torque control device for an impact type pneumatic torque wrench according to claim 1, wherein the torque control device further comprises:
a plurality of setting units for setting the preset value or the type or mode of at least one locking operation;
a logic controller is disposed in the torque control device and memorizes the type or mode of the at least one locking operation;
a pressure sensor is disposed in the torque control device to sense the pressure of the compressed gas input, the actual working pressure of the impact pneumatic torque wrench or the output change of the compressed gas during the locking process;
a pressure regulator disposed at an inlet of the torque control device to adjust according to one of a type or a mode of the at least one locking operation, a pressure of the compressed gas sensed by the pressure sensor, or a combination thereof The pressure of the compressed gas; and a timer that records or counts the time of each operation of the impact pneumatic torque wrench according to one of the types or modes of the at least one locking operation. The torque control device for an impact type pneumatic torque wrench according to claim 2, wherein the type or mode of the at least one locking operation comprises a length of locking, two-stage locking, locking times or the preset value. . The torque control device for an impact type pneumatic torque wrench according to claim 1, wherein the preset value is a time value or a torque value. The torque control device of the impact type pneumatic torque wrench according to claim 1, wherein the pressure in the impact type pneumatic torque wrench is in the compressed gas supply passage when the output control unit closes the state of the compressed gas output The pressure is in an equilibrium state. A torque control method for an impact type pneumatic torque wrench includes the following steps:
Connecting a compressed gas supply passage to an input control unit of a torque control device;
The input control unit is movably connected to an input interface of an impact pneumatic torque wrench to stably supply a compressed gas of a predetermined pressure to the impact pneumatic torque wrench;
Connecting an output control unit of the torque control device to one of the output interfaces of the impact pneumatic torque wrench;
Applying the impact pneumatic torque wrench to a workpiece to lock the workpiece to an object; and controlling the output control unit to close the compression by a processing unit according to a predetermined value and a previously verified data Gas output.
The torque control method of claim 6, wherein the preset value further includes a first preset value and a second preset value; the workpiece further includes a first workpiece and a second workpiece; The torque control method further includes the following steps:
Entering or selecting one or a combination of the first preset value, the second preset value, the type or mode of at least one locking operation;
Applying the impact pneumatic torque wrench to the first workpiece;
The processing unit controls the output control unit to close the compressed gas output according to the first preset value and the previously verified data to pre-lock the first workpiece to the object;
Applying the impact pneumatic torque wrench to the second workpiece;
The processing unit controls the output control unit to close the compressed gas output according to the first preset value and the previously verified data to pre-lock the second workpiece to the object;
Applying the impact pneumatic torque wrench to the first workpiece;
Controlling, by the processing unit, the output control unit to close the compressed gas output according to the second preset value and the previously verified data to lock the first workpiece to the object;
Applying the impact pneumatic torque wrench to the second workpiece; and controlling, by the processing unit, the output control unit to turn off the compressed gas output according to the second preset value and the previously verified data, so that the The second workpiece is locked to the object. The torque control method described in claim 7 of the patent scope further includes the following steps:
Sensing the pressure of the compressed gas input by a pressure sensor, the actual working pressure of the impact pneumatic torque wrench or the output change of the compressed gas during the locking process; and the lock according to the lock by a pressure regulator The pressure of the compressed gas is adjusted by the type or mode of the solid work, the pressure of the compressed gas sensed by the pressure sensor, or a combination thereof. The torque control method of claim 7, wherein the type or mode of the at least one locking operation comprises a length of locking, two-stage locking, locking times or the preset value. The torque control method according to claim 6, wherein the pressure in the impact type pneumatic torque wrench is balanced with the pressure in the compressed gas supply passage when the output control unit turns off the state of the compressed gas output. status.