CN110580064A - Torsion control method and torsion control device for locking bolts in multiple times - Google Patents
Torsion control method and torsion control device for locking bolts in multiple times Download PDFInfo
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- CN110580064A CN110580064A CN201810577911.9A CN201810577911A CN110580064A CN 110580064 A CN110580064 A CN 110580064A CN 201810577911 A CN201810577911 A CN 201810577911A CN 110580064 A CN110580064 A CN 110580064A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D17/00—Control of torque; Control of mechanical power
- G05D17/02—Control of torque; Control of mechanical power characterised by the use of electric means
Abstract
The invention provides a torque control method and a torque control device for locking bolts in turns. The method comprises the following steps: connecting the torque control device between an air pressure air supply system and the torque tool; generating a plurality of flow combinations through a torque control device according to the maximum air consumption of the torque tool under load; establishing a plurality of corresponding relation lines of working air pressure and torque according to the high and low working air pressure and the corresponding large and small torque values which are respectively obtained by the flow combinations; obtaining the maximum torque control range of the torque tool under the working air pressure capable of being normally operated according to the corresponding relation lines of the working air pressure and the torque; obtaining a relation line and working air pressure corresponding to the target torque value of each round according to the locking parameters in the grading; and driving the torque tool to lock the bolt from small to large in several times until the final target torque is completed.
Description
Technical Field
The present invention relates to the field of torque control technology, and more particularly to a torque control method and a torque control device for locking a bolt with a pneumatic impact torque tool in several steps.
Background
The present inventors have obtained several patents related to torque control, such as taiwan patent nos. I509379 and I569923.
In actual application, the flow adjusting button on the pneumatic torque tool needs to be switched to adjust the air inlet size so as to control the output torque. Therefore, when the relationship curve between the air pressure and the corresponding torque value is established according to the above invention (patent publication No. I509379), the flow adjusting buttons on the tool need to be manually switched one by one to establish the relationship line between the high and low working air pressures at each flow rate and the corresponding torque value. When the locking is performed in several times, it is necessary to switch to the corresponding position of the flow adjusting button according to the torque range covered by the target torque of each locking.
Furthermore, bolts with high control accuracy of the locking torque force usually need to be locked to the target torque force in several rounds. Even when the linearity of the relationship curve is worse due to the design or wear of the impact mechanism, the accuracy of the control is affected, and a good solution is needed.
Disclosure of Invention
therefore, the present invention is directed to a torque control method and a torque control device for locking a bolt in multiple steps, so as to improve the above-mentioned disadvantages and enhance the effective utilization of the industry.
according to an aspect of the present invention, a torque control method for locking a bolt in multiple steps is provided for a locking operation of a pneumatic torque tool, comprising the steps of: connecting a torque control device between the air pressure air supply system and the torque tool, wherein the torque control device is provided with a flow control module; adjusting a flow regulating valve of the torque tool to the maximum flow, measuring the maximum air consumption of the torque tool under load by a torque control device, and automatically matching a plurality of flow combinations by the torque control device according to the maximum air consumption; during torque force verification, the flow control module is used for verifying output torque force under each flow combination, and corresponding relation lines of a plurality of air pressure values and torque values corresponding to each flow combination are respectively established according to a first working air pressure value and a corresponding first torque value and a corresponding second working air pressure value and a corresponding second torque value under each flow combination, wherein the first working air pressure value is not equal to the second working air pressure value; when the locking is actually carried out, locking parameters are set, wherein the locking parameters comprise locking times and a plurality of target torque values corresponding to the locking times; obtaining a plurality of actual working air pressure values of a plurality of target torque values respectively corresponding to each locking frequency according to a plurality of corresponding relation lines of the air pressure values and the torque; and the torque control device respectively locks the bolts by the torque tool in a plurality of times according to the actual working air pressure value corresponding to the target torque value from small to large.
Preferably, before each locking round, the method further comprises the following steps: the torque control device controls the initial working air pressure at each time to be equal to the lowest working air pressure of the torque tool under normal operation.
Preferably, during the torque force calibration, the method further comprises the following steps: directly locking the bolt by using a torque tool, then obtaining a torque value when the bolt is locked or released by using a torque checking tool, and inputting the torque value to a torque control device; in the process of calibration, the air consumption variation and the torque value corresponding to the first working air pressure value and the second working air pressure value, which are simultaneously captured by the air flow sensor in the torque control device, are stored in the memory unit of the torque control device together, so as to establish a plurality of corresponding relationship lines between the working air pressure values and the torques in each flow combination.
Preferably, during the torque force calibration, the method further comprises the following steps: driving the torque sensing device by a torque tool; in the process of checking through the torque control device, the air consumption change sensed by the air flow sensor and the torque signal sensed by the torque sensing device are simultaneously captured and stored in a memory unit of the torque control device together, so that a plurality of corresponding relation lines of air pressure values and torque are established.
preferably, during the torque calibration, each flow combination comprises a plurality of pressure intervals from low to high, further comprising the following steps: establishing a corresponding relation line of the sub-air pressure value and the torque corresponding to each air pressure interval according to the first working air pressure value and the corresponding first torque value and the corresponding second torque value of each air pressure interval respectively; and establishing a corresponding relation line of the air pressure value and the torque under the flow combination according to the corresponding relation lines of the plurality of sub-air pressure values and the torque.
according to another aspect of the present invention, a torque control device for locking a bolt in multiple steps is connected between an air supply system and a torque tool, and a flow control valve of the torque tool is adjusted to a maximum flow. The torque control device includes: the air inlet pressure monitoring module monitors the air pressure entering the torsion control device from the air pressure air supply system and gives out a warning when the air pressure exceeds a set upper limit; the air pressure control and regulation module comprises an air pressure proportional control valve and is used for controlling and stably outputting the air pressure to the flow control module; the flow control module generates a plurality of flow combinations according to the maximum air consumption of the torque tool under load so as to drive the torque tool to operate; the air outlet pressure sensor is arranged between the flow control module and the torque tool and used for sensing the output working air pressure in the locking process; the control circuit board module comprises a processing unit and a memory unit, wherein the memory unit stores a first working air pressure value, a second working air pressure value, a first torque value and a second torque value which are respectively corresponding to the first working air pressure value and the second working air pressure value which are obtained by verification according to each flow combination during verification, and the processing unit establishes a plurality of corresponding relation lines of the air pressure values and the torques according to the first working air pressure value, the second working air pressure value, the first torque value and the second torque value; the processing unit automatically adjusts the flow and the working air pressure value from small to large according to a locking parameter comprising the locking times and a plurality of target torque values corresponding to the locking times, and controls the output torque of each turn until the final target torque value is finished.
Preferably, the flow control module is a combination of a plurality of solenoid valves, an automatic flow proportional control valve and a solenoid valve, or an electric control valve and a solenoid valve.
Preferably, the processing unit opens at least one solenoid valve, opens some of the plurality of solenoid valves, or opens all of the solenoid valves by controlling to form a plurality of flow combinations.
Drawings
Fig. 1 is a flowchart illustrating a torque control method for locking a bolt in multiple steps according to the present invention.
Fig. 2 is a block diagram of an embodiment of a torque control device for bolt split locking according to the present invention.
Fig. 3 is a schematic diagram illustrating a method for establishing a relationship line between air pressure and torque at any flow rate combination in the torque control method for bolt split locking according to the present invention.
Fig. 4 is a schematic diagram of a relationship line between high and low air pressures and corresponding torques obtained by checking and applying the torque control method for locking the bolt in multiple steps according to various combinations of flow rates.
In the drawings, the names represented by the respective reference numerals are as follows:
100. torque control device
10. Intake pressure monitoring module
20. Flow control module
21. Flow combination
22. Electromagnetic valve
30. Air pressure control adjusting module
40. air pressure sensor gives vent to anger
60. Control circuit board module
61. processing unit
62. Memory cell
91. Air pressure air supply system
92. Torque tool
PL 1-PL 5, first working air pressure value of each air pressure interval
PH 1-PH 5, second working air pressure value of each air pressure interval
TL 1-TL 5 and first torque value of each air pressure interval
TH 1-TH 5, second torque value of each air pressure interval
L1-1 to L1-5, and corresponding relation line of sub-air pressure value and torque
L1-L3, corresponding relation line of air pressure value and torque under different flow combinations
S11-S16, steps of control method
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and examples.
in the following embodiments, technical means such as establishing a corresponding relation line of an output (air pressure) value and a torque are described in patent publication No. I509379, for example, and it is noted that the whole of the technical means is incorporated into the present specification.
Please refer to fig. 1. The torque control method for locking the bolt in multiple times of the invention is explained by using a pneumatic torque tool and matching with the torque control device of the invention, and comprises the following steps: (S11) connecting a torque control device between the pneumatic air supply system and the torque tool, wherein the torque control device is provided with a flow control module; (S12) adjusting the flow control valve of the torque tool to the maximum flow, measuring the maximum air consumption of the torque tool under load by the torque control device, and automatically matching a plurality of flow combinations with different flows by the torque control device according to the maximum air consumption; (S13) when verifying the torsion, the flow control module is used for verifying the torsion output under high and low working air pressure under each flow combination, and corresponding relation lines of a plurality of air pressure values and torsion corresponding to each flow combination are established according to the first working air pressure value, the corresponding first torsion value, the corresponding second working air pressure value and the corresponding second torsion value of each flow combination, wherein the first working air pressure value is not equal to the second working air pressure value; (S14) setting locking parameters including the number of times of locking and a plurality of target torque values corresponding to the number of times of locking when actually locking; (S15) obtaining a plurality of actual operating air pressure values corresponding to a plurality of target torque values for each locking number of times, respectively, based on the corresponding relationship lines between the plurality of air pressure values and the torque; and (S16) the torque control device respectively locks the bolts by the torque tool in a plurality of times according to the actual working air pressure values corresponding to the target torque values from small to large.
In addition, if the torque tool is a hydraulic torque tool, the first working air pressure value, the second working air pressure value and the actual working air pressure value are hydraulic pressure values respectively.
The torque control method for locking the bolt in multiple times of the invention will be described in conjunction with the torque control device of the invention.
Please refer to fig. 2. The torque control device 100 for locking bolts in multiple steps of the present invention is connected between the air pressure supply system 91 and the torque tool 92 to drive the torque tool 92 to lock the bolts in multiple steps from small to large.
the torque control device 100 includes: an intake pressure monitoring module 10 that controls the pressure of the gas entering the torque control device 100 from the air pressure supply system 91 and provides an alarm when the intake pressure exceeds a default upper limit of the torque control device 100; a pneumatic control and regulation module 30 for controlling or regulating the pneumatic pressure outputted to the flow control module 20 by means of a pneumatic proportional control valve; the flow control module 20, which generates a plurality of flow combinations 21 by the processing unit 61 according to the maximum air consumption of the torque tool 92 under load, and selectively selects corresponding flow combinations according to the locked rounds and the target torque values of the rounds; an air pressure sensor 40 disposed between the flow control module 20 and the torque tool 92 for sensing the air pressure output to the torque tool 92 during the locking process; a control circuit board module 60 including a processing unit 61 and a memory unit 62; the memory unit 62 stores the first working air pressure value and the second working air pressure value obtained by verification under each flow combination 21 during verification and the corresponding first torque value and second torque value respectively; the processing unit 61 establishes a plurality of corresponding relationship lines of air pressure and torque according to the locking parameters received by the input/output module and the plurality of working air pressure values and the plurality of torque values stored in the memory unit 62, for example, during verification, according to the high and low working air pressures and the corresponding large and small torque values obtained by each flow combination 21, the processing unit 61 locks the corresponding relationship lines of air pressure and torque and the predetermined locking turns, the number of bolts and the target torque value of each turn from small to large until the final target torque is reached.
specifically, before the operation, the operator first adjusts the flow adjustment button of the torque tool 92 to the maximum position, and then starts the torque tool, so as to measure the maximum air consumption of the torque tool 92 under the load condition through the flow control module 20 of the torque control device 100. Meanwhile, the processing unit 61 of the control circuit board module 60 automatically matches and generates a plurality of flow combinations 21A, 21B, 21C …, etc. according to the maximum air consumption and the setting parameters, so that the flow control module 20 can replace the function of the flow adjusting button of the torque tool 92, and can automatically switch and adjust to the corresponding flow combinations and working air pressure according to the default round and the target torque of each round, thereby the operator can adjust the flow without manually adjusting the output torque, and further the working efficiency and the convenience of operation can be greatly improved.
Next, output torque verification is performed for each flow combination 21A, 21B, 21C …. During the calibration, the torque sensor installed at the output end of the torque tool 92 is driven to lock a test socket or directly lock the bolt, so as to calibrate the first and second working air pressure values operable for the torque tool 92 under each flow combination 21A, 21B, 21C, so as to obtain the corresponding first and second torque values, e.g., the corresponding maximum and minimum torque values under the highest and lowest working air pressure values.
Fig. 3 is a schematic diagram of a relationship line between high and low air pressures and torque values corresponding to a set of flow rates in a flow combination of the torque control method for bolt split locking according to the present invention.
For example, the flow combination 21A may include a plurality of pressure ranges from low to high, and the lowest working pressure PL1 to the highest working pressure PH5 of the torque tool 92 that can normally operate are divided into five pressure steps, and PL1-PH1, PL2-PH2, PL3-PH3, PL4-PH4, and PL5-PH5 are formed from low to high, where the PH1 is PL2, the PH2 is PL3, the PH3 is PL4, and the PH4 is PL 5. TL1 is a torque value verified corresponding to PL1, TH1 is a torque value verified corresponding to PH1, and the torque value constitutes a corresponding relation line L1-1 (hereinafter referred to as a sub relation line) between the sub-air pressure value and the torque of the torque tool 92 at the two high and low points of the air pressure PL1-PH1 and the corresponding large and small torque values TL1-TH1 in the air pressure interval. Next, TL2 is obtained by verification when PL2 of the adjacent higher grade distance is adjacent, and TH2 is obtained by verification when PH2 is adjacent, which constitutes a sub-relation line L1-2 between the air pressure PL2-PH2 and the corresponding torque value TL2-TH2 at the two high and low points of the air pressure interval of the torque tool 92. Where TL2 would be equal to TH1, the verification step for TL2 is omitted.
By analogy with the above description, the sub-relationship line L1-3 of TL3-TH3 corresponding to PL3-PH3 with higher order distance, the sub-relationship line L1-4 of TL4-TH4 corresponding to PL4-PH4 with higher order distance, and the sub-relationship line L1-5 of TL5-TH5 corresponding to PL5-PH5 with highest order distance can be obtained in sequence.
Then, a corresponding relation line L1 of the output value and the torque is established according to the sub relation lines, and the corresponding relation line L1 (hereinafter referred to as a relation line) of the output value and the torque obtained by the verification in this way is closer to the actual condition than the relation line S established by the patent publication No. I509379.
it should be noted that before each locking, the torque control device 100 controls the initial working air pressure at each time to be equal to the lowest working air pressure at which the torque tool 92 can normally operate, so as to avoid that the locking accuracy is affected by the higher air pressure remaining in the pipeline at the moment of starting. Moreover, no matter the size of the pipeline, the size of the inlet/outlet joint, the length and the like, and no matter what the torque tool 92 is linked to from the inlet to the torque control device 100, after the calibration of the curves related to the high and low working air pressures and the corresponding torque, the calibration cannot be carried out and any leakage needs to be prevented, and if any calibration is carried out, the calibration needs to be carried out again to ensure the control accuracy.
Please refer to fig. 4. As described above, the verification is performed for the second flow combination 21B (higher-order flow combination), and the relationship line L2 of the second flow combination 21B is obtained. Thus, the relationship lines of the flow combinations 21A, 21B, and 21C are established sequentially from small to large, and in the present embodiment, three flow combinations with different sizes are taken as an example, but not limited thereto.
In this embodiment, the flow control module 20 may be a combination of an automatic flow proportional regulating valve and a solenoid valve, or may be a combination of an electric regulating valve and a solenoid valve. The automatic flow proportion regulating valve or the electric regulating valve can be arranged at the front end or the rear end of the electromagnetic valve.
Please refer to fig. 4. It can be seen that the relationship lines L1, L2, L3 are the torque tool 92, and the torque tool is operated at the lowest 50PSI and the highest 80PSI, and the torque tool is operated at three flow combinations from small to large, the high-low torque value range of the relationship line L1 obtained by verifying the low flow combination (230L/min) of the first segment is 15.01-24.4NM, the high-low torque value range of the relationship line L2 obtained by verifying the flow combination (500L/min) of the second segment is 26.11-39.59NM, and the high-low torque value range of the relationship line L3 obtained by verifying the maximum flow combination (730L/min) of the third segment is 30.1-43.86 NM.
If the torque tool 92 locks 5 bolts to the target torque value 40NM 3 times, and the first round is set to 40% of the target torque value (i.e. the first target torque value is 16NM), the second round is set to 70% of the target torque value (i.e. the second target torque value is 28NM), and the third round is set to the target torque value 40 NM.
Starting locking operation, the processing unit 61 of the control circuit board module 60 selects to open the flow combination 21A of the relation line L1 according to the first target torque value, and finds the working air pressure 52PSI corresponding to the first round target torque 16NM on line in the relation, after locking 5 pieces in sequence, then opens the flow combination L2 corresponding to the second round target torque 28NM, meanwhile finds the corresponding working air pressure 54.3PSI on the relation line segment, after locking 5 pieces in sequence, opens the flow combination L3 corresponding to the third round final target torque 40NM, and finds the corresponding working air pressure 72.4PSI on the relation line segment; therefore, after each bolt of each round is locked to the target torsion of each round, whether the bolt is qualified or not is displayed in real time, and the sound is used for warning. And automatically switches to the combination of the next flow rates until the final target torque.
Therefore, if the relation line established by the method shown in fig. 3 of the invention is adopted, the working air pressure corresponding to the relation line can be found out on the corresponding relation line of the air pressure and the torque of any line segment corresponding to the target torque, compared with the prior art that a nonlinear control curve between two points of the highest air pressure and the maximum torque value and between two points of the lowest air pressure and the minimum torque value is roughly adopted, the actual corresponding working air pressure can be found out more accurately, and the control precision is further improved.
In summary, the torque control method and the torque control device for bolt locking in multiple steps of the present invention optimize the relationship curve between the maximum torque point and the minimum torque point corresponding to the maximum air pressure value and the minimum air pressure value proposed in the previous proposal to obtain the relationship line between the high air pressure and the low air pressure of each step and the corresponding large torque value at a smaller air pressure step, and find the air pressure corresponding to the target torque of each turn to control the torque at the online relationship after the relationship lines of each section of each flow combination are connected. In addition, the flow control module additionally arranged on the torque control device can replace the function of a flow adjusting button of a torque tool, so that an operator can automatically adjust the output torque without manually adjusting the flow, and the working efficiency and the operation convenience can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A torsion control method for locking a bolt in multiple times is applied to locking operation of a torsion tool and is characterized by comprising the following steps:
connecting a torque control device between the air pressure air supply system and the torque tool, wherein the torque control device is provided with a flow control module;
Adjusting a flow regulating valve of the torque tool to the maximum flow, measuring the maximum air consumption of the torque tool under load through the torque control device, and automatically matching a plurality of flow combinations by the torque control device according to the maximum air consumption;
During torque force verification, the flow control module is utilized to verify output torque force under different working air pressures under each flow combination, and corresponding relation lines of a plurality of air pressure values and torque forces under each flow combination are established according to a first working air pressure value, a corresponding first torque value, a corresponding second working air pressure value and a corresponding second torque value of each flow combination, wherein the first working air pressure value is not equal to the second working air pressure value;
Setting locking parameters during actual locking, wherein the locking parameters comprise locking times and a plurality of target torque values corresponding to the locking times;
Obtaining a plurality of actual working air pressure values of the plurality of target torque values respectively corresponding to each locking frequency according to the corresponding relation lines of the plurality of working air pressure values and the torque; and
And the torque control device respectively drives the torque tool to lock and fix the bolt in multiple times according to the actual working air pressure value corresponding to the target torque value from small to large.
2. The torque control method for split bolt locking according to claim 1, wherein before each actual locking, the method further comprises the steps of:
The torque control device controls the initial working air pressure at each time to be equal to the lowest working air pressure of the torque tool under normal operation.
3. The torque control method for split-locking of a bolt according to claim 1, wherein during torque verification, the method further comprises the steps of:
after the torque tool is used for directly locking and fixing the bolt, a torque value when the bolt is locked or loosened is obtained by using a torque checking tool, and the torque value is input to the torque control device;
In the process of checking and locking, the air consumption change and the torque value corresponding to the first working air pressure value and the second working air pressure value under each flow combination are simultaneously captured through an air flow sensor in the torque control device and are stored in a memory unit of the torque control device together, so that corresponding relation lines of a plurality of working air pressure values and torques under each flow combination are established.
4. The torque control method for split-locking of a bolt according to claim 1, wherein during torque verification, the method further comprises the steps of:
Driving a torque sensing device with the torque tool;
And simultaneously capturing the air consumption change sensed by the air flow sensor and the torque signal sensed by the torque sensing device in the locking process of verifying the torque through the preset high and low working air pressure in the torque control device, and storing the air consumption change and the torque signal into a memory unit of the torque control device together so as to establish corresponding relation lines of a plurality of working air pressure values and the torque under each flow combination.
5. the method of claim 1, wherein during torque verification, each of the flow combinations comprises a plurality of air pressure ranges from low to high, the method further comprising:
establishing a corresponding relation line of the sub-working air pressure value and the torque corresponding to each air pressure interval according to the first working air pressure value and the corresponding first torque value and the corresponding second torque value of the air pressure interval respectively;
And establishing a corresponding relation line of the working air pressure value and the torque according to the corresponding relation lines of the plurality of sub-working air pressure values and the torque.
6. The utility model provides a torque control device that bolt locked solid in grades which characterized in that, torque control device connects between air pressure air supply system and torque tool, and torque tool's flow control valve is for adjusting to the maximum flow, torque control device contains:
The air inlet pressure monitoring module monitors the air pressure entering the torque control device from the air pressure air supply system and gives an alarm when the air pressure exceeds a set upper limit;
The air pressure control and regulation module comprises an air pressure proportional control valve so as to control and stably output the air pressure to the flow control module;
The flow control module generates a plurality of flow combinations with different flows according to the maximum air consumption of the torque tool under load, and the flow combinations are used for driving the torque tool to operate;
The air outlet pressure sensor is arranged between the flow control module and the torque tool and used for sensing output working air pressure in the locking process;
the control circuit board module comprises a processing unit and a memory unit, wherein the memory unit stores a first working air pressure value and a second working air pressure value which are obtained by checking under a preset high-low working air pressure according to each flow combination during checking, and a first torque value and a second torque value which correspond to each other respectively;
The processing unit automatically adjusts the flow and the working air pressure value from small to large according to the locking parameters comprising the locking times and a plurality of target torque values corresponding to the locking times, and controls the output torque of each turn until the final target torque value is finished.
7. the torque control device for bolt split locking according to claim 6, wherein the torque control device controls the initial working air pressure to be equal to the lowest working air pressure of the torque tool under normal operation before each round of locking is performed.
8. The torque control device for bolt locking according to claim 6, wherein the flow control module is a combination of a plurality of solenoid valves, an automatic flow ratio control valve and a solenoid valve, or an electric control valve and a solenoid valve.
9. the torque control device for bolt split locking according to claim 8, wherein the processing unit is configured to form the plurality of flow combinations by controlling to open at least one of the solenoid valves, some of the solenoid valves, or all of the solenoid valves.
10. The torque control device according to claim 6, wherein each of the flow combinations includes a plurality of air pressure ranges from low to high, the processing unit establishes a corresponding relationship line between the sub-output value and the torque corresponding to each of the air pressure ranges of each of the flow combinations according to the first working output value and the corresponding first torque value and the corresponding second working output value of the air pressure range and the corresponding second torque value, respectively, and then establishes a corresponding relationship line between the output value and the torque according to a plurality of corresponding relationship lines between the sub-output value and the torque.
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| CN107448439A (en) * | 2016-05-30 | 2017-12-08 | 中国气动工业股份有限公司 | The device and control system of programmable air servo-motor |
| CN205996610U (en) * | 2016-08-11 | 2017-03-08 | 许昌远东传动轴股份有限公司 | Slip shaft yoke boring earhole fixture |
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