CN113237660A - Pneumatic wrench life detection system - Google Patents
Pneumatic wrench life detection system Download PDFInfo
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- CN113237660A CN113237660A CN202110496325.3A CN202110496325A CN113237660A CN 113237660 A CN113237660 A CN 113237660A CN 202110496325 A CN202110496325 A CN 202110496325A CN 113237660 A CN113237660 A CN 113237660A
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Abstract
The application discloses pneumatic trigger life-span detecting system, including pneumatic trigger positioning unit, pneumatic trigger switching-over unit, pneumatic trigger start-up unit, main air feed unit, trigger air feed unit and the control unit. The pneumatic trigger positioning unit is used for pressing the pneumatic trigger to keep the pneumatic trigger at a fixed position; the air trigger reversing unit is used for operating a reversing rod of the air trigger so as to realize the switching between forward rotation and reverse rotation of the air trigger. The pneumatic trigger starting unit is used for pulling a trigger button of the pneumatic trigger. The trigger air supply unit is used for supplying air to the air trigger, the main air supply unit is used for supplying air to the air trigger positioning unit, the air trigger reversing unit, the air trigger starting unit and the trigger air supply unit, and the control unit is used for controlling the work of the units so as to realize the automation of the service life test of the air trigger.
Description
Technical Field
The application relates to a life detection device, in particular to a life detection system for a pneumatic trigger.
Background
The pneumatic trigger is a pneumatic tool which converts the rotary energy of a pneumatic engine into rotary impact power by using a rotary impactor and screws or disassembles threaded connection by using rotary impact torque. The pneumatic wrench has the advantages of large tightening torque, flexibility, small volume, light weight, high efficiency and the like, is suitable for being used by a single machine, and is widely applied to the fields of aviation, automobiles, shipbuilding, locomotives, household appliances and the like.
The air trigger strikes the trigger axle constantly at the working process impact piece, leads to relevant parts to last wearing and tearing, and the longer the air trigger operating time, wearing and tearing will be more serious, and then lead to performance index decline such as tightening torque reduces, the gas consumption increase, rotational speed reduction. Therefore, the service life test of the pneumatic trigger is the key point of attention of manufacturers and users, and is also an important link for reducing the quality gap between domestic products and foreign advanced products.
At present, no industrial standard or national standard suitable for testing the service life of the pneumatic trigger exists, no unified testing method exists, and no related automatic testing equipment exists. However, manual testing consumes a lot of time and labor, the testing result is also influenced by human factors, and few enterprises are willing to invest such a large cost to carry out life testing, so that the production enterprises do not know the service life of the products of the enterprises, and the quality improvement basis is lacked.
Disclosure of Invention
An object of the application is to provide a pneumatic trigger life-span detecting system, can realize the automation that pneumatic trigger life-span detected.
In order to achieve the above object, the present application provides a pneumatic trigger service life detection system, which comprises a pneumatic trigger positioning unit, a pneumatic trigger reversing unit, a pneumatic trigger starting unit, a main air supply unit, a trigger air supply unit and a control unit,
the pneumatic trigger positioning unit comprises a pressing cylinder, a first air passage and a first valve assembly, the pressing cylinder is used for pressing the pneumatic trigger, the first air passage is communicated with the main air supply unit and the pressing cylinder, the first valve assembly is arranged on the first air passage and is electrically connected with the control unit, and the control unit drives a piston rod of the pressing cylinder to extend or retract by controlling the operation of the first valve assembly, so that the pressing and releasing of the pneumatic trigger are realized;
the air trigger reversing unit comprises a forward rotation reversing cylinder, a reverse rotation reversing cylinder, a second air passage and a second valve assembly, the forward rotation reversing cylinder and the reverse rotation reversing cylinder are used for operating a reversing rod of the air trigger, the second air passage is communicated with the main air supply unit, the forward rotation reversing cylinder and the reverse rotation reversing cylinder, the second valve assembly is arranged on the second air passage, the second valve assembly is electrically connected with the control unit, and the control unit controls the second valve assembly to work so as to drive a piston rod of the forward rotation reversing cylinder or the reverse rotation reversing cylinder to shift the reversing rod, so that the turning switching of a trigger shaft of the air trigger is realized;
the pneumatic trigger starting unit comprises a trigger cylinder, a third air path and a third valve assembly, the trigger cylinder is used for pulling a trigger button of a pneumatic trigger, the third air path is communicated with the main air supply unit and the trigger cylinder, the third valve assembly is arranged on the third air path, the third valve assembly is electrically connected with the control unit, and the control unit drives a piston rod of the trigger cylinder to displace by controlling the operation of the third valve assembly, so that the trigger button is pressed;
trigger air feed unit includes the fourth gas circuit and sets up fourth valve assembly on the fourth gas circuit, the fourth gas circuit is used for the intercommunication main air feed unit and the gas trigger that awaits measuring, the fourth valve assembly with the control unit electricity is connected, the control unit is through control the work of fourth valve assembly is in order to adjust the air feed to the gas trigger.
Further, main air feed unit includes sets gradually air supply, filter, main relief pressure valve, ball valve and gas holder along the air current direction, the back is opened to the ball valve, the compressed air process of air supply the filter with the filtration of main relief pressure valve and decompression are handled the back, get into the gas holder, the exit of gas holder divide into four ways, respectively with first gas circuit the second gas circuit the third gas circuit with the fourth gas circuit intercommunication.
Further, the compressing cylinder is a double-acting cylinder, the first valve assembly comprises a first pressure reducing valve, a first switch valve and a first two-position five-way electromagnetic valve which are sequentially arranged along the airflow direction, two interfaces of the first two-position five-way electromagnetic valve are respectively communicated with interfaces on and under the piston of the compressing cylinder so as to drive the piston rod of the compressing cylinder to extend or retract, the control unit is electrically connected with the first switch valve to control the switch of the first switch valve, and the control unit is electrically connected with the first two-position five-way electromagnetic valve to control the first two-position five-way electromagnetic valve to perform output switching, so that the piston rod of the compressing cylinder is driven to extend or retract.
Preferably, the first valve assembly further comprises a first one-way throttle valve arranged between one interface of the first two-position five-way electromagnetic valve and the interface on the upper side of the piston of the pressing cylinder, and a second one-way throttle valve arranged between the other interface of the first two-position five-way electromagnetic valve and the interface on the lower side of the piston of the pressing cylinder, wherein the first one-way throttle valve and the second one-way throttle valve are used for adjusting the running speed of the piston rod of the cylinder.
Further, corotation switching-over cylinder with the reversal switching-over cylinder is the single-action cylinder, second valve subassembly includes along airflow direction set gradually second relief pressure valve, second ooff valve and second two five-way solenoid valve, two interfaces of second two five-way solenoid valve respectively with corotation switching-over cylinder with reversal switching-over cylinder intercommunication, the control unit with second ooff valve electricity is connected in order to control its switch, the control unit with second two five-way solenoid valve electricity is connected in order to control it and carries out the output switching, thereby drive corotation switching-over cylinder or the piston rod of reversal switching-over cylinder stretches out.
Further, the second valve assembly further comprises a third one-way throttle valve arranged between one interface of the second two-position five-way electromagnetic valve and the forward rotation reversing cylinder, and a fourth one-way throttle valve arranged between the other interface of the second two-position five-way electromagnetic valve and the reverse rotation reversing cylinder, wherein the third one-way throttle valve and the fourth one-way throttle valve are used for adjusting the running speed of a piston rod of the cylinder.
Further, the trigger cylinder is the single-action cylinder, the third valve subassembly includes third relief pressure valve and two three-way solenoid valve that set gradually along the air current direction, two three-way solenoid valve's interface with the trigger cylinder intercommunication, the control unit with two three-way solenoid valve electricity are connected in order to control its output, thereby are used for the drive trigger button is withheld to the piston rod of trigger cylinder.
And a fifth one-way throttle valve is arranged between the two-position three-way electromagnetic valve and the trigger cylinder and used for adjusting the running speed of a piston rod of the cylinder.
Further, the fourth valve component comprises a fourth switch valve, an electric pressure proportional valve and a flow meter which are sequentially arranged along the airflow direction, the control unit is electrically connected with the fourth switch valve to control the switch of the fourth switch valve, the control unit is electrically connected with the electric pressure proportional valve to adjust the output air pressure, and the control unit is electrically connected with the flow meter to collect the air flow data.
Further, trigger air feed unit is still including setting up pressure sensor on the fourth gas circuit, pressure sensor is in between fourth valve component and the gas trigger for the monitoring waits to survey the atmospheric pressure of gas trigger front end, the control unit with pressure sensor electricity is connected, in order to gather pressure data.
Compared with the prior art, the beneficial effect of this application lies in: the utility model provides a pneumatic trigger life-span testing arrangement can carry out screwing up repeatedly of pneumatic trigger and dismantle the threaded fastener process, can realize the automation of pneumatic trigger life-span test.
Drawings
FIG. 1 is a schematic view of one embodiment of a pneumatic trigger life detection system of the present application;
FIG. 2 is a schematic view of one embodiment of a pneumatic trigger life detection test stand of the present application;
FIG. 3 is a schematic view of a testing station of the pneumatic trigger life testing stand of the present application, showing the pneumatic trigger mounted on the testing station;
FIG. 4 is a top view of a testing station of the pneumatic trigger life testing stand of the present application, showing the pneumatic trigger mounted in the testing station;
FIG. 5 is a schematic view of a testing station of the pneumatic trigger life testing stand of the present application, showing the pneumatic trigger mounted on the testing station;
FIG. 6 is a schematic view of a testing station of the pneumatic trigger life testing stand of the present application, showing a state where the pneumatic trigger is mounted on the testing station, wherein the forward rotation reversing cylinder and its reversing cylinder bracket are not shown;
FIG. 7 is an exploded view of one inspection station of the pneumatic trigger life test stand of the present application, with the table top not shown;
FIG. 8 is a side view of a testing station of the pneumatic trigger life testing stand of the present application, showing the pneumatic trigger mounted in the testing station;
FIG. 9 is a cross-sectional schematic view of a test threaded fastener assembly of one of the inspection stations of the pneumatic trigger life test stand of the present application;
in the figure:
1. a pneumatic trigger positioning unit; 11. a pressing cylinder; 12. a first gas path; 131. a first pressure reducing valve; 132. a first on-off valve; 133. a first two-position five-way solenoid valve; 134. a first one-way throttle valve; 135. a second one-way throttle valve;
2. a pneumatic trigger reversing unit; 21. a positive rotation reversing cylinder; 22. a reverse reversing cylinder; 23. a second gas path; 241. a second pressure reducing valve; 242. a second on-off valve; 243. a second two-position five-way solenoid valve; 244. a third one-way throttle valve; 245. a fourth one-way throttle valve;
3. a pneumatic trigger starting unit; 31. a trigger cylinder; 32. a third gas path; 331. a third pressure reducing valve; 332. a two-position three-way electromagnetic valve; 333. a fifth one-way throttle valve;
4. a main gas supply unit; 41. a gas source; 42. a filter; 43. a primary pressure relief valve; 44. a ball valve; 45. a gas storage tank;
5. a trigger air supply unit; 51. a fourth gas path; 521. a fourth switching valve; 522. an electric pressure proportional valve; 523. a flow meter; 524. a pressure sensor;
6. a control unit;
7. a pneumatic trigger; 71. a reversing lever; 72. a trigger button; 73. a wrench shaft;
8. a test station; 81. a handle support frame; 811. a first slider; 812. a second slider; 82. compressing the cylinder bracket; 821. compressing the cylinder chute; 83. a reversing cylinder support; 831. a reversing cylinder chute; 84. a reversing cylinder support; 85. a trigger cylinder support; 851. a trigger cylinder chute; 86. testing the threaded fastening assembly; 861. a sleeve; 862. testing the bolt; 863. testing the screw cap; 864. testing the gasket; 865. a gasket; 866. a spring washer; 867. a nut;
9. a frame; 91. a table-board.
Detailed Description
The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the present application provides a pneumatic trigger life detection system for detecting the life of a pneumatic trigger 7. As will be appreciated by those skilled in the art: the pneumatic trigger 7 is provided with an air supply interface, and air is supplied to the pneumatic trigger 7 through the air supply interface; as shown in fig. 4, the air trigger 7 further has a reversing lever 71, and the air trigger 7 can be switched to rotate forward or backward by pulling the reversing lever 71; as shown in fig. 6, the air trigger 7 has a trigger button 72, and after air is supplied to the air trigger 7, the air trigger 7 is activated by operating the trigger button 72; as shown in fig. 9, the pneumatic trigger 7 has a trigger shaft 73, and the trigger shaft 73 acts on the test nut through a sleeve.
The pneumatic trigger service life detection system comprises a pneumatic trigger positioning unit 1, a pneumatic trigger reversing unit 2, a pneumatic trigger starting unit 3, a main gas supply unit 4, a trigger gas supply unit 5 and a control unit 6.
The air trigger positioning unit 1 is used for positioning and pressing the air trigger, and shaking of the air trigger during automatic working is avoided. The pneumatic trigger positioning unit 1 includes a clamping cylinder 11, a first air passage 12 and a first valve assembly. The hold-down cylinder 11 is used to hold down the air trigger 7 in a fixed position. One end of the first air passage 12 communicates with the main air supply unit 4, and the other end communicates with the pressing cylinder 11. The first valve component is arranged on the first air passage 12, and drives a piston rod of the compacting air cylinder 11 to extend or retract by regulating air flow entering the compacting air cylinder 11 so as to realize the compaction and the loosening of the handle of the air trigger 7. The first valve assembly is electrically connected with the control unit 6, and the operation of the first valve assembly is controlled by the control unit 6.
The pneumatic trigger reversing unit 2 is used for shifting a reversing rod 71 of the pneumatic trigger 7 so as to realize automatic switching of the rotation direction of a trigger shaft 73 of the pneumatic trigger 7. The pneumatic trigger reversing unit 2 comprises a forward reversing cylinder 21, a reverse reversing cylinder 22, a second air passage 23 and a second valve assembly. The forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 are used for operating the reversing lever 71 of the air trigger 7 to switch the forward rotation and the reverse rotation of the air trigger 7. One end of the second air passage 23 is communicated with the main air supply unit 4, and the other end is communicated with the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 respectively. The second valve assembly is disposed on the second air passage 23, and drives the piston rods of the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 to shift the reversing rod 71 by regulating the air flow entering the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22, respectively. The second valve assembly is electrically connected to the control unit 6, and the operation of the second valve assembly is controlled by the control unit 6.
The air trigger starting unit 3 is used for operating a trigger button 72 of the air trigger 7 to realize automatic opening and closing of the air trigger 7. The air trigger activation unit 3 includes a trigger cylinder 31, a third air passage 32, and a third valve assembly. The trigger cylinder 31 is used to actuate a trigger button 72 of the pneumatic trigger 7. One end of the third air passage 32 communicates with the main air supply unit 4, and the other end communicates with the trigger cylinder 31. A third valve assembly is provided on the third air passage 32, which drives the piston rod of the trigger cylinder 31 to displace by regulating the air flow into the trigger cylinder 31. The third valve assembly is electrically connected to the control unit 6, and the operation of the third valve assembly is controlled by the control unit 6.
The trigger air supply unit 5 is used to supply compressed air required for the operation to the air trigger 7. The trigger air supply unit 5 includes a fourth air passage 51 and a fourth valve assembly provided on the fourth air passage 51. One end of the fourth air path 51 is communicated with the main air supply unit 4, the other end of the fourth air path is suitable for being communicated with the air trigger 7 to be detected, and the fourth valve assembly is arranged on the fourth air path 51 and used for adjusting the air flow entering the air trigger 7. The fourth valve assembly is electrically connected to the control unit 6, and the operation of the fourth valve assembly is controlled by the control unit 6.
In some embodiments, the main air supply unit 4 comprises an air source 41, a filter 42, a main pressure reducing valve 43, a ball valve 44, and an air storage tank 45 arranged in sequence along the air flow direction. After the ball valve 44 is opened, the compressed air from the air source 41 is filtered and decompressed by the filter 42 and the main decompression valve 43, and then enters the air storage tank 45, and the air storage tank 45 is used for ensuring the stability of air supply. The outlet of the air storage tank 45 is divided into four paths, which are respectively communicated with the first air path 12, the second air path 23, the third air path 32 and the fourth air path 51.
In one embodiment, the first valve assembly includes a first pressure reducing valve 131, a first switching valve 132, and a first two-position five-way solenoid valve 133, which are sequentially disposed in the gas flow direction. Two ports of the first two-position five-way solenoid valve 133 are respectively communicated with ports on and under the piston of the pressing cylinder 11, so as to drive the piston rod of the pressing cylinder 11 to extend or retract. It will be appreciated by those skilled in the art that the compacting cylinder 11 is a double acting cylinder which compresses or releases the pneumatic trigger 7 by alternately supplying air on both sides of its piston to effect extension or retraction of the piston rod. The control unit 6 is electrically connected to the first switching valve 132 to control the opening and closing thereof, and the first switching valve 132 controls the opening and closing of the first air passage 12. The control unit 6 is also electrically connected to the first two-position five-way solenoid valve 133 to control the first two-position five-way solenoid valve 133 to perform output switching, so as to switch the moving direction of the piston rod of the pressing cylinder 11.
In one embodiment, the first valve assembly further comprises a first one-way throttle valve 134 disposed between one port of the first two-position five-way solenoid valve 133 and the port on the upper side of the piston of the hold down cylinder 11 and a second one-way throttle valve 135 disposed between the other port of the first two-position five-way solenoid valve 133 and the port on the lower side of the piston of the hold down cylinder 11. The first one-way throttle valve 134 and the second one-way throttle valve 135 are used to adjust the operating speed of the cylinder piston rod.
In one embodiment, the second valve assembly includes a second pressure reducing valve 241, a second switching valve 242, and a second two-position five-way solenoid valve 243, which are sequentially disposed in the gas flow direction. Two interfaces of the second two-position five-way electromagnetic valve 243 are respectively communicated with the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 so as to control the piston rod of the forward rotation reversing cylinder 21 and the piston rod of the reverse rotation reversing cylinder 22 to act in a coordinated manner, and the reversing of the pneumatic trigger 7 is realized. The forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 are single-action cylinders, air is supplied to one side of a piston of each single-action cylinder to stretch out the piston rod, and the piston rod is reset through a spring. The control unit 6 is electrically connected to the second switching valve 242 to control the switching thereof, and the second switching valve 242 controls the switching of the second air path 23. The control unit 6 is also electrically connected with the second two-position five-way electromagnetic valve 243 to control the second two-position five-way electromagnetic valve 243 to perform output switching, so as to switch the extension of the piston rod of the forward rotation reversing cylinder 21 or the reverse rotation reversing cylinder 22.
In some preferred embodiments, the second valve assembly further includes a third one-way throttle valve 244 disposed between one interface of the second two-position five-way solenoid valve 243 and the forward reversing cylinder 21 and a fourth one-way throttle valve 245 disposed between the other interface of the second two-position five-way solenoid valve 243 and the reverse reversing cylinder 22. The third one-way throttle valve 244 and the fourth one-way throttle valve 245 are used to adjust the operating speed of the cylinder piston rod.
In one embodiment, the third valve assembly includes a third pressure reducing valve 331 and a two-position, three-way solenoid valve 332 disposed in series in the direction of gas flow. The interface of the two-position three-way solenoid valve 332 is communicated with the trigger cylinder 31 to drive the piston rod of the trigger cylinder 31 to move and pull the trigger button 72. The trigger cylinder 31 is a single-acting cylinder, and is reset by a spring. The control unit 6 is electrically connected with the two-position three-way solenoid valve 332 to control the action of the trigger cylinder 31 through the two-position three-way solenoid valve 332. Preferably, a fifth one-way throttle valve 333 is provided between the two-position three-way solenoid valve 332 and the trigger cylinder 31 for adjusting the operating speed of the cylinder piston rod.
In one embodiment, the fourth valve assembly includes a fourth switching valve 521, an electrical pressure proportional valve 522, and a flow meter 523 arranged in order in the direction of air flow. The control unit 6 is electrically connected to the fourth switching valve 521 to control the opening and closing thereof, and the fourth switching valve 521 controls the opening and closing of the fourth air passage 51. The control unit 6 is electrically connected to the electric pressure proportional valve 522 to regulate the output air pressure. The control unit 6 is electrically connected to the flow meter 523 to collect gas flow data. The trigger air supply unit 5 further comprises a pressure sensor 524 arranged on the fourth air path 51, the pressure sensor 524 is arranged between the fourth valve component and the air trigger 7 and used for monitoring the air pressure at the front end of the air trigger 7 to be detected, and the control unit 6 is electrically connected with the pressure sensor 524 to acquire pressure data.
In some embodiments, the control unit 6 includes a data acquisition card, a control module, an input module, a display module, and a power amplifier module. The data acquisition card is electrically connected to a flow meter 523 and a pressure sensor 524 to acquire flow and pressure data. The input module and the display module allow an operator to input test parameters, test instructions and the like according to prompts. The power amplifier module is used for sending instructions to the first switch valve 132, the first two-position five-way electromagnetic valve 133, the second switch valve 242, the second two-position five-way electromagnetic valve 243, the two-position three-way electromagnetic valve 332, the fourth switch valve 521 and the electric pressure proportional valve 522 to control the actions of the first switch valve 132, the first two-position five-way electromagnetic valve 133, the second switch valve 242, the second two-position five-way electromagnetic valve 243, the two-position three-way electromagnetic valve 332, the fourth switch valve 521 and the electric pressure proportional valve 522.
The control unit 6 comprises a touch screen, and the functions of inputting the test parameters and the test instructions of the control unit 6 are realized through the touch screen.
The application also provides a pneumatic trigger life detection test bed for installing the pneumatic trigger 7, the pressing cylinder 11, the forward rotation reversing cylinder 21, the reverse rotation reversing cylinder 22, the trigger cylinder 31 and the testing thread fastening assembly 86.
As shown in fig. 2 to 6, the air trigger life test bench comprises a frame 9 and a plurality of test stations 8 arranged on a table 91 of the frame 9, wherein each test station 8 can be used for testing one air trigger 7.
As shown in fig. 5 and 7, the test station 8 includes a handle support frame 81 for supporting the rear end of the handle of the air trigger 7, the handle support frame 81 includes a first slider 811 and a second slider 812, the first slider 811 is movably mounted on the table 91 in the forward and backward direction so that the handle support frame 81 can move forward and backward along the table 91, the second slider 812 is movably mounted on the first slider 811 in the upward and downward direction, and the rear end of the handle of the air trigger 7 is adapted to be disposed on the second slider 812. By adjusting the positions of the first block 811 and the second block 812, the position of the air trigger 7 can be adjusted up and down and back and forth.
It is worth mentioning that by "movably mounted" in this application is meant that the element can be moved to a suitable position, in which the element can be held in position by the fastener, and in which case the fastener can be operated to allow the element to be moved again when the element needs to be moved again.
As shown in fig. 5 and 7, the testing station 8 includes a pressing cylinder bracket 82 for mounting the pressing cylinder 11, the pressing cylinder bracket 82 is mounted on the table 91 in a movable manner back and forth so that the pressing cylinder bracket 82 can move back and forth along the table 91, and the pressing cylinder 11 is mounted on the pressing cylinder bracket 82 in a movable manner up and down so that the position of the pressing cylinder 11 can be adjusted back and forth and up and down. The piston rod of the pressing cylinder 11 faces downwards, so that when the handle of the air trigger 7 is arranged on the handle support frame 81, the piston rod of the pressing cylinder 11 is opposite to the upper part of the handle of the air trigger 7, and the air trigger 7 can be pressed by driving the piston rod of the pressing cylinder 11 to move downwards, so that the position of the air trigger is kept fixed. In some embodiments, the pressing cylinder bracket 82 has a pressing cylinder sliding groove 821 in a vertical direction, and the housing of the pressing cylinder 11 is slidably mounted on the pressing cylinder sliding groove 821 in an up-and-down direction.
It is worth mentioning that the front end of the piston rod of the pressing cylinder 11 is provided with a pressing plate, and the shape of the pressing plate is matched with the shape of the handle of the pneumatic trigger 7 so as to stably press the pneumatic trigger 7.
As shown in fig. 7, the test station 8 further includes two reversing cylinder brackets 83, 84 for mounting the forward reversing cylinder 21 and the reverse reversing cylinder 22, and the two reversing cylinder brackets 83, 84 are symmetrically mounted on the table 91 in a manner of moving left and right, so that when the air trigger 7 is disposed on the test station 8, the two reversing cylinder brackets 83, 84 are located on the left and right sides of the air trigger 7, and the two reversing cylinder brackets 83, 84 can adjust the distance from the air trigger 7 by moving left and right. The normal rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 are respectively mounted on the two reversing cylinder brackets 83, 84 movably up and down, so that the positions of the normal rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 can be adjusted up, down, left and right. The piston rods of the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 are disposed in opposition to each other so that when the handle of the air trigger 7 is held on the handle support frame 81, the piston rods of the forward rotation reversing cylinder 21 and the reverse rotation reversing cylinder 22 are opposed to the left and right sides of the reversing lever 71 of the air trigger 7, respectively, and as shown in fig. 4, the reversing lever 71 can be pulled to switch the rotation direction of the air trigger 7 by driving the piston rod of the forward rotation reversing cylinder 21 or the reverse rotation reversing cylinder 22 to extend. In some embodiments, the two reversing cylinder brackets 83 and 84 respectively have a reversing cylinder sliding groove 831 extending in a vertical direction, and the forward reversing cylinder 21 and the reverse reversing cylinder 22 are respectively slidably mounted on the reversing cylinder sliding groove 831 via a connecting block.
As shown in fig. 7, the testing station 8 further includes a trigger cylinder frame 85 for mounting the trigger cylinder 31, the trigger cylinder frame 85 is mounted on the table 91 in a movable manner back and forth so that the trigger cylinder frame 85 can move back and forth along the table 91, and the trigger cylinder 31 is mounted on the trigger cylinder frame 85 in a movable manner up and down so that the position of the trigger cylinder 31 can be adjusted back and forth and up and down. The piston rod of the trigger cylinder 31 is oriented upward so that the trigger button 72 of the air trigger 7 is opposite the piston rod of the trigger cylinder 31 when the air trigger 7 is installed at the test station 8, as shown in fig. 6. In some embodiments, the trigger cylinder frame 85 has a vertically oriented trigger cylinder chute 851, and the housing of the trigger cylinder 31 is slidably mounted on the trigger cylinder chute 851 in an up-and-down direction.
Further, as shown in fig. 8 and 9, the testing station 8 further includes a testing screw fastening assembly 86, which includes a sleeve 861, a testing bolt 862 and a testing nut 863, wherein the testing bolt 862 is fixedly mounted on the platform 91, the testing nut 863 is screw-connected to the testing bolt 862, the sleeve 861 is sleeved outside the testing nut 863, when the handle of the pneumatic trigger 7 is held on the handle support frame 81, the pulling shaft 73 of the pneumatic trigger 7 is coaxial with the sleeve 861 and is inserted into the sleeve 861, and the pulling shaft 73 drives the testing nut 863 to rotate through the sleeve 861. Further, the testing bolt 862 penetrates the table 91, and a testing gasket 864 is disposed between the testing nut 863 and the upper surface of the table 91, wherein the testing gasket 864 should be of a high-strength specification type so as to be capable of being repeatedly tightened and disassembled. A gasket 865, a spring gasket 866 and a nut 867 are further arranged between the lower end of the test bolt 862 and the lower surface of the table top 91 from top to bottom in sequence.
The pneumatic trigger 7 is compressed, started and automatically reversed through the control unit 6.
The preparation process before the test is as follows:
according to the bolt tightening capacity of the tested air trigger 7, selecting a testing threaded fastening assembly 86 with a corresponding specification and installing the testing threaded fastening assembly on the table 91; inserting the pulling shaft 73 of the air trigger 7 into the sleeve 861, adjusting the handle support frame 81 to a proper position and height, and supporting the handle of the air trigger 7; adjusting the pressing cylinder bracket 82 to a proper position and height, adjusting the first pressure reducing valve 131 to a proper output pressure, sending an instruction through the touch screen, opening the first switch valve 132, switching the first two-position five-way electromagnetic valve 133, extending the piston rod of the pressing cylinder 11, and pressing the handle of the pneumatic trigger 7; adjusting the second pressure reducing valve 241 to a proper output pressure, and adjusting the reversing cylinder brackets 83 and 84 to proper positions and heights, so that the piston rods of the forward reversing cylinder 21 and the reverse reversing cylinder 22 can normally pull the reversing rod 71 of the pneumatic trigger 7; the third pressure reducing valve 331 is adjusted to a proper output pressure, and the trigger cylinder bracket 85 is adjusted to a proper position and height so that the piston rod of the trigger cylinder 31 can normally push the trigger button 72 of the pneumatic trigger 7.
The test parameters such as screwing time, disassembling time, test times and test pressure are set through the touch screen, and after the click starts, the control unit 6 performs the following steps:
the fourth switch valve 521 is opened to supply air to the air trigger 7; the second switch valve 242 is opened, the second two-position five-way electromagnetic valve 243 is switched, the piston of the forward rotation reversing cylinder 21 is pushed, and the reversing rod 71 of the air trigger 7 is positioned at the forward rotation direction position; the two-position three-way electromagnetic valve 332 is switched on, the piston rod of the trigger cylinder 31 extends out to pull the trigger button 72, the tested air trigger 7 rotates forwards to screw the test nut 863, the test pressure is adjusted to a set value through the electric pressure proportional valve 522 according to the pressure value fed back by the pressure sensor 524, the two-position three-way electromagnetic valve 332 is switched off when the forward rotation time reaches the set screwing time, the piston rod of the trigger cylinder 31 retracts, and the tested air trigger 7 stops rotating; the second two-position five-way electromagnetic valve 243 is switched, the reversing rod 71 of the pneumatic trigger 7 is located at the reversing direction position under the action of the piston rod of the reversing air cylinder 22, the two-position three-way electromagnetic valve 332 is switched on again, the piston rod of the trigger air cylinder 31 extends out to buckle the trigger button 72 again, the tested pneumatic trigger 7 reverses to disassemble the test nut 863, the two-position three-way electromagnetic valve 332 is switched off when the reversing time reaches the set disassembling time, in this way, the screwing and disassembling process is completed once, the above programs are repeatedly operated, and the operation is stopped until the set testing times are reached.
The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.
Claims (10)
1. A service life detection system of a pneumatic trigger is characterized by comprising a pneumatic trigger positioning unit, a pneumatic trigger reversing unit, a pneumatic trigger starting unit, a main air supply unit, a trigger air supply unit and a control unit,
the pneumatic trigger positioning unit comprises a pressing cylinder, a first air passage and a first valve assembly, the pressing cylinder is used for pressing the pneumatic trigger, the first air passage is communicated with the main air supply unit and the pressing cylinder, the first valve assembly is arranged on the first air passage and is electrically connected with the control unit, and the control unit drives a piston rod of the pressing cylinder to extend or retract by controlling the operation of the first valve assembly, so that the pressing and releasing of the pneumatic trigger are realized;
the air trigger reversing unit comprises a forward rotation reversing cylinder, a reverse rotation reversing cylinder, a second air passage and a second valve assembly, the forward rotation reversing cylinder and the reverse rotation reversing cylinder are used for operating a reversing rod of the air trigger, the second air passage is communicated with the main air supply unit, the forward rotation reversing cylinder and the reverse rotation reversing cylinder, the second valve assembly is arranged on the second air passage, the second valve assembly is electrically connected with the control unit, and the control unit controls the second valve assembly to work so as to drive a piston rod of the forward rotation reversing cylinder or the reverse rotation reversing cylinder to shift the reversing rod, so that the turning switching of a trigger shaft of the air trigger is realized;
the pneumatic trigger starting unit comprises a trigger cylinder, a third air path and a third valve assembly, the trigger cylinder is used for pulling a trigger button of a pneumatic trigger, the third air path is communicated with the main air supply unit and the trigger cylinder, the third valve assembly is arranged on the third air path, the third valve assembly is electrically connected with the control unit, and the control unit drives a piston rod of the trigger cylinder to displace by controlling the operation of the third valve assembly, so that the trigger button is pressed;
trigger air feed unit includes the fourth gas circuit and sets up fourth valve assembly on the fourth gas circuit, the fourth gas circuit is used for the intercommunication main air feed unit and the gas trigger that awaits measuring, the fourth valve assembly with the control unit electricity is connected, the control unit is through control the work of fourth valve assembly is in order to adjust the air feed to the gas trigger.
2. The air trigger life detection system according to claim 1, wherein the main air supply unit comprises an air source, a filter, a main pressure reducing valve, a ball valve and an air storage tank which are sequentially arranged along an air flow direction, after the ball valve is opened, compressed air of the air source enters the air storage tank after being filtered and subjected to pressure reduction treatment by the filter and the main pressure reducing valve, and an outlet of the air storage tank is divided into four paths which are respectively communicated with the first air path, the second air path, the third air path and the fourth air path.
3. The pneumatic trigger life detection system according to claim 1, wherein the hold-down cylinder is a double-acting cylinder, the first valve assembly includes a first pressure reducing valve, a first switch valve and a first two-position five-way solenoid valve, which are sequentially arranged along an air flow direction, two ports of the first two-position five-way solenoid valve are respectively communicated with ports on and under the hold-down cylinder piston for driving a piston rod of the hold-down cylinder to extend or retract, the control unit is electrically connected with the first switch valve for controlling the on and off of the first switch valve, and the control unit is electrically connected with the first two-position five-way solenoid valve for controlling the output switching of the first two-position five-way solenoid valve.
4. The pneumatic trigger life detection system according to claim 3, wherein the first valve assembly further comprises a first one-way throttle valve disposed between one port of the first two-position five-way solenoid valve and the port on the upper side of the pressing cylinder piston, and a second one-way throttle valve disposed between the other port of the first two-position five-way solenoid valve and the port on the lower side of the pressing cylinder piston, the first one-way throttle valve and the second one-way throttle valve being used for adjusting the operating speed of the cylinder piston rod.
5. The pneumatic trigger life detection system of claim 1, wherein the forward rotation reversing cylinder and the reverse rotation reversing cylinder are single-acting cylinders, the second valve assembly comprises a second pressure reducing valve, a second switch valve and a second two-position five-way solenoid valve which are sequentially arranged along the air flow direction, two interfaces of the second two-position five-way solenoid valve are respectively communicated with the forward rotation reversing cylinder and the reverse rotation reversing cylinder, the control unit is electrically connected with the second switch valve to control the on and off of the second switch valve, and the control unit is electrically connected with the second two-position five-way solenoid valve to control the output switching of the second switch valve.
6. The air trigger life detection system of claim 5, wherein the second valve assembly further comprises a third one-way throttle valve disposed between one port of the second two-position five-way solenoid valve and the forward rotation reversing cylinder and a fourth one-way throttle valve disposed between the other port of the second two-position five-way solenoid valve and the reverse rotation reversing cylinder, the third one-way throttle valve and the fourth one-way throttle valve being used for adjusting the operating speed of a cylinder piston rod.
7. The pneumatic trigger life detection system according to claim 1, wherein the trigger cylinder is a single-acting cylinder, the third valve assembly includes a third pressure reducing valve and a two-position three-way solenoid valve sequentially arranged along the air flow direction, an interface of the two-position three-way solenoid valve is communicated with the trigger cylinder, and the control unit is electrically connected with the two-position three-way solenoid valve to control the output thereof.
8. The pneumatic trigger life detection system according to claim 7, wherein a fifth one-way throttle valve is provided between the two-position three-way solenoid valve and the trigger cylinder for adjusting the operating speed of a cylinder piston rod.
9. The pneumatic trigger life detection system of claim 1, wherein the fourth valve assembly comprises a fourth switch valve, an electrical pressure proportional valve and a flow meter which are sequentially arranged along the gas flow direction, the control unit is electrically connected with the fourth switch valve to control the switch of the fourth switch valve, the control unit is electrically connected with the electrical pressure proportional valve to adjust the output gas pressure, and the control unit is electrically connected with the flow meter to collect gas flow data.
10. The pneumatic trigger life detection system of claim 9, wherein the trigger air supply unit further comprises a pressure sensor disposed on the fourth air path, the pressure sensor is disposed between the fourth valve assembly and the pneumatic trigger for monitoring the air pressure at the front end of the pneumatic trigger to be measured, and the control unit is electrically connected to the pressure sensor for collecting pressure data.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496325.3A CN113237660A (en) | 2021-05-07 | 2021-05-07 | Pneumatic wrench life detection system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110496325.3A CN113237660A (en) | 2021-05-07 | 2021-05-07 | Pneumatic wrench life detection system |
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| CN113237660A true CN113237660A (en) | 2021-08-10 |
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| CN202110496325.3A Pending CN113237660A (en) | 2021-05-07 | 2021-05-07 | Pneumatic wrench life detection system |
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