A pressure-maintaining and no-load resistance test device and method for rodless cylinders

Abstract

The present invention discloses a pressure-maintaining and no-load resistance test device for a rodless cylinder, comprising a test bench, a table top of which is formed with a strip hole, a left fixing seat and a right fixing seat are respectively arranged on the table top in front of both ends of the strip hole, and the two ends of the rodless cylinder to be tested are respectively connected to the left fixing seat and the right fixing seat; a lead screw is arranged at the bottom of the table top below the strip hole, one end of the lead screw is provided with a brushless motor for driving the lead screw to rotate, a sensor mounting seat is threadedly connected to the lead screw, the top of the sensor mounting seat extends upward in the strip hole, and a force sensor is installed on the top of the sensor mounting seat, and a push-pull hook connected to the slider of the rodless cylinder to be tested is installed on the force-bearing surface of the force sensor; the result data of the test test of the present invention is intuitively visualized and automatically recorded and stored, which is convenient for later reference, thereby improving product production efficiency and product quality, and can be operated by one person, releasing manual labor and improving the accuracy of the test.

Description

Technical Field

[0001] The invention relates to a pressure-maintaining and no-load resistance test device and method for a rodless cylinder, belonging to the technical field of rodless cylinder testing equipment. Background Art

[0002] At present, when the rodless cylinder is performing a pressure holding test, a pressure relief ball valve is used to control the air source pressure, and the 0.6MPa pressure is completely controlled by the operator's feel, resulting in inaccurate test pressure; the pressure holding time is also calculated by the operator pressing the stopwatch; at the same time, when the rodless cylinder is performing a no-load resistance test, a spring scale is used to pull the slider of the rodless cylinder for testing. The no-load resistance of the rodless cylinder cannot move at a uniform speed, and the spring scale often falls off the slider of the rodless cylinder, affecting the test results; and the rodless cylinder requires two people to cooperate in the operation when performing pressure holding and no-load resistance tests, resulting in low product production efficiency, and easy test deviation, resulting in unstable product quality; at the same time, due to the lack of data storage function, there is no basis for checking the final test results; therefore, in order to improve product production efficiency and product quality, releasing manual labor and improving the accuracy of the test have become the key issues to be solved by this technical solution. Summary of the Invention

[0003] In order to address the deficiencies of the prior art, the present invention provides a pressure-maintaining and no-load resistance testing device and method for a rodless cylinder. The test process is simple, convenient, and automatic. The test result data is intuitively visualized and automatically recorded and stored, making it easy to verify later, thereby improving product production efficiency and product quality. One person can operate it, freeing up manual labor and improving the accuracy of the test.

[0004] The technical solution adopted in the present invention is:

[0005] A pressure-maintaining and no-load resistance test device for a rodless cylinder comprises a test bench, wherein a strip hole is formed on the table top of the test bench, a left fixing seat and a right fixing seat are respectively provided on the table top in front of both ends of the strip hole, and the two ends of the rodless cylinder to be tested are respectively connected to the left fixing seat and the right fixing seat; a lead screw is provided at the bottom of the table top below the strip hole, a brushless motor for driving the lead screw to rotate is provided at one end of the lead screw, a sensor mounting seat is threadedly connected to the lead screw, the top of the sensor mounting seat extends upward in the strip hole, and a force sensor is installed on the top of the sensor mounting seat, and a push-pull hook connected to the slider of the rodless cylinder to be tested is installed on the force-bearing surface of the force sensor; the brushless motor drives the lead screw The rod rotates, and the rotation of the lead screw drives the sensor mounting seat to move back and forth along the strip hole, so that the push-pull hook pushes and pulls the slider of the rodless cylinder to be tested to move back and forth. The force sensor installed on the top of the sensor mounting seat is used to sense the force generated during the pushing and pulling process; it also includes a power module, a PLC controller, a touch display, a pilot solenoid valve, a pressure sensor, a start switch and multiple indicator lights, wherein the touch display, the start switch and the multiple indicator lights are arranged on the test bench, the power module is used to supply power, the touch display, the pressure sensor, the start switch, the force sensor are connected to the PLC controller, and the PLC controller controls the pilot solenoid valve, multiple indicator lights and a brushless motor.

[0006] As a further preference of the present invention, the test bench is also provided with an emergency stop button connected to the PLC controller; when an emergency occurs, the operator can press the emergency stop button, and the PLC controller controls the test bench to stop working.

[0007] As a further preferred embodiment of the present invention, photoelectric switches are respectively provided on the rear surfaces at both ends of the strip-shaped hole, and the photoelectric switches are connected to the PLC controller. The photoelectric switches are used to sense the moving position of the push-pull hook.

[0008] As a further preferred embodiment of the present invention, the multiple indicator lights include a power indicator light, a pressure holding test indicator light and a no-load resistance test indicator light.

[0009] A method for testing pressure holding and no-load resistance of a rodless cylinder comprises the following steps:

[0010] (1) Cylinder pressure test: First, connect the two ends of the rodless cylinder to be tested to the left and right fixed seats respectively; turn on the external air source switch and connect the air pipe to the rodless cylinder to be tested; press the start switch of the test bench and the power indicator light will light up; click the cylinder pressure test button displayed on the main menu interface of the touch screen to enter the cylinder pressure test interface; at this time, the air pressure value on the cylinder pressure test interface is 0; click the cylinder pressure test button displayed on the cylinder pressure test interface, and the PLC controller controls the pilot solenoid valve to energize, so that the air pipe is inflated into the rodless cylinder to be tested, and set The pressure sensor on the air pipe detects the change in the air pressure value in the rodless cylinder to be tested and sends the air pressure value to the PLC controller. The PLC controller sends the air pressure value to the cylinder pressure test interface on the touch screen for display. When the air pressure value reaches the requirement, the PLC controller controls the pilot solenoid valve to cut off the power, so that the air pipe stops inflating the rodless cylinder to be tested; the cylinder pressure holding test starts, and when the pressure holding time is reached, the cylinder pressure holding test is stopped; the PLC controller records the air pressure value change and pressure holding time in the rodless cylinder to be tested, and finally releases the air pressure in the rodless cylinder to be tested;

[0011] (2) Cylinder no-load resistance test: Remove the air pipe connected to the rodless cylinder to be tested, and then connect the push-pull hook to the slider of the rodless cylinder to be tested; click the return button on the touch screen to return to the main menu interface of the touch screen, and then click the cylinder no-load resistance test button displayed on the main menu interface of the touch screen to enter the cylinder no-load resistance test interface; at this time, the force value on the cylinder no-load resistance test interface is displayed as 0; click the cylinder no-load resistance forward test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance forward test. The PLC controller controls the brushless motor to drive the screw to rotate. The screw rotation drives the sensor mounting seat to move from left to right along the strip hole, so that the push-pull hook pushes the rodless cylinder to be tested. The slider moves to the right at a constant speed and stops after reaching the test distance; click the cylinder no-load resistance reverse test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance reverse test, and the PLC controller controls the brushless motor to drive the screw to rotate. The rotation of the screw drives the sensor mounting seat to move from right to left along the strip hole, so that the push-pull hook pulls the slider of the rodless cylinder to be tested to move to the left at a constant speed and stops after reaching the test distance; during the cylinder no-load resistance forward test and reverse test, the force sensor installed on the top of the sensor mounting seat senses the force generated during the push-pull process, and sends the force value to the PLC controller. The PLC controller stores the force value and sends it to the touch screen cylinder no-load resistance test interface for display;

[0012] (3) Click the return button on the touch screen to return to the main menu interface of the touch screen; disconnect the push-pull hook from the slider of the rodless cylinder to be tested; remove the rodless cylinder to complete the test.

[0013] As a further preference of the method of the present invention, in the cylinder no-load resistance test, two photoelectric switches are provided for sensing the moving position of the push-pull hook. The two photoelectric switches respectively sense the position of the push-pull hook moving to the rightmost end and the leftmost end during the forward test and reverse test of the cylinder no-load resistance. The PLC controller controls the start and stop of the brushless motor according to the signal of the photoelectric switch.

[0014] As a further preference of the method of the present invention, during the cylinder pressure maintaining test, the power indicator light on the test bench is on and the pressure maintaining test indicator light is on; after the cylinder pressure maintaining test is stopped, the power indicator light on the test bench is on and the pressure maintaining test indicator light is off; the pressure maintaining test indicator light can intuitively remind the operator that the test process is in progress, prevent accidents and improve safety.

[0015] As a further optimization of the method of the present invention, during the forward test and reverse test of the cylinder no-load resistance, the power indicator light on the test bench is on and the no-load resistance test indicator light is on; after stopping the forward test and reverse test of the cylinder no-load resistance, the power indicator light on the test bench is on and the no-load resistance test indicator light is off; the no-load resistance test indicator light can intuitively remind the operator that the test process is in progress, prevent accidents and improve safety.

[0016] The beneficial effects of the present invention are: the test process is simple and convenient to operate and is carried out automatically; the test result data is intuitively visualized and automatically recorded and stored, which is convenient for later reference, thereby improving product production efficiency and product quality; one person can operate it, freeing up manual labor and improving the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the test bench of the present invention;

[0018] Figure 2 This is a schematic diagram of the top view of the test bench of the present invention;

[0019] Figure 3 This is a side structural schematic diagram of the test bench of the present invention;

[0020] Figure 4 This is a schematic diagram of the circuit of the present invention;

[0021] The main reference numerals in the figures have the following meanings:

[0022] 1-Touch screen, 2-Indicator light, 3-Start switch, 4-Right fixing seat, 5-Test bench, 6-Bar hole, 7-Lead screw, 8-Sensor mounting seat, 9-Push-pull hook, 10-Force sensor, 11-Left fixing seat, 12-Photoelectric switch, 13-PLC controller, 14-Power module, 15-Pilot solenoid valve, 16-Pressure sensor, 17-Brushless motor, 18-Emergency stop button, 19-Relay. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-3 As shown: This embodiment is a pressure-maintaining and no-load resistance test device for a rodless cylinder, comprising a test bench 5, a strip hole 6 is formed on the table top of the test bench 5, and a left fixing seat 11 and a right fixing seat 4 are respectively provided on the table top in front of both ends of the strip hole 6, and the two ends of the rodless cylinder to be tested are respectively connected to the left fixing seat 11 and the right fixing seat 4; a lead screw 7 is provided at the bottom of the table below the strip hole 6, and a brushless motor 17 for driving the lead screw 7 to rotate is provided at one end thereof, and a sensor mounting seat 8 is threadedly connected to the lead screw 7, and the top of the sensor mounting seat 8 extends upward in the strip hole 6, and a force sensor 10 is installed on the top of the sensor mounting seat 8, and a push-pull hook 9 connected to the slider of the rodless cylinder to be tested is installed on the force-bearing surface of the force sensor 10; in actual application, a sliding rod parallel to the lead screw 7 can also be provided at the bottom of the table, and the sensor mounting seat 8 is threadedly connected to the lead screw 7 and is slidably connected to the sliding rod, so that the lead screw 7 rotates to drive The sensor mounting seat 8 can be more stable when it moves back and forth left and right along the strip hole 6; when the device of this embodiment is working, the brushless motor 17 drives the screw 7 to rotate, and the rotation of the screw 7 drives the sensor mounting seat 8 to move back and forth left and right along the strip hole 6, so that the push-pull hook 9 pushes and pulls the slider of the rodless cylinder to be tested to move back and forth left and right, and the force sensor 10 installed on the top of the sensor mounting seat 8 is used to sense the force generated during the push-pull process; it also includes a power supply module 14, a PLC controller 13, a touch display screen 1, a pilot solenoid valve 15, a pressure sensor 16, a start switch 3 and a plurality of indicator lights 2, wherein the touch display screen 1, the start switch 3 and the plurality of indicator lights 2 are arranged on the test bench 5, the power supply module 14 is used for power supply, the touch display screen 1, the pressure sensor 16, the start switch 3, the force sensor 10 is connected to the PLC controller 13, and the PLC controller 13 controls the pilot solenoid valve 15, the plurality of indicator lights 2 and the brushless motor 17; the circuit connection relationship is as follows Figure 4 As shown, attached Figure 4 This is a simplified circuit diagram of this embodiment, omitting some indicator lights; the PLC controller 13 uses a Siemens S7-200cpu224 XP controller.

[0025] In this embodiment, an emergency stop button 18 connected to the PLC controller 13 is further provided on the test bench 5; when an emergency occurs, the operator can press the emergency stop button 18, and the PLC controller 13 controls the test bench 5 to stop working.

[0026] In this embodiment, photoelectric switches 12 are respectively provided on the rear surfaces at both ends of the strip-shaped hole 6 . The photoelectric switches 12 are connected to a PLC controller 13 . The photoelectric switches 12 are used to sense the moving position of the push-pull hook 9 .

[0027] The multiple indicator lights 2 described in this embodiment include a power indicator light, a pressure-holding test indicator light, and a no-load resistance test indicator light; in actual applications, indicator lights for prompting other matters can also be set according to requirements.

[0028] A method for pressure-holding and no-load resistance tests of a rodless cylinder includes the following steps:

[0029] (1) Cylinder pressure-holding test: First, connect both ends of the rodless cylinder to be tested to the left fixed seat 11 and the right fixed seat 4 respectively; open the main air source switch of the external air circuit, and connect the air pipe to the rodless cylinder to be tested; press the start switch 3 of the test bench 5, and the power indicator light turns on; click the cylinder pressure-holding test button displayed on the main menu interface of the touch display screen 1 to enter the cylinder pressure-holding test interface; at this time, the air pressure value displayed on the cylinder pressure-holding test interface is 0; click the cylinder pressure-holding test button displayed on the cylinder pressure-holding test interface, and the PLC controller 13 controls the pilot solenoid valve 15 to be energized, so that the air pipe inflates the rodless cylinder to be tested. The pressure sensor 16 provided on the air pipe detects the change in the air pressure value in the rodless cylinder to be tested and sends the air pressure value to the PLC controller 13. The PLC controller 13 sends the air pressure value to the cylinder pressure-holding test interface of the touch display screen 1 for display. When the air pressure value reaches the requirement, the PLC controller 13 controls the pilot solenoid valve 15 to be de-energized, so that the air pipe stops inflating the rodless cylinder to be tested; start the cylinder pressure-holding test. After the pressure-holding time arrives, stop the cylinder pressure-holding test; the PLC controller 13 records the change in the air pressure value and the pressure-holding time in the rodless cylinder to be tested, and finally releases the air pressure in the rodless cylinder to be tested; in actual applications, the cylinder pressure-holding test described in this step can also perform a pressure-holding test on a common piston rod cylinder, and the pressure-holding test principle of the cylinder is the same;

[0030] (2) Cylinder no-load resistance test: remove the air pipe connected to the rodless cylinder to be tested, and then connect the push-pull hook 9 to the slider of the rodless cylinder to be tested; click the return button on the touch screen 1 to return to the main menu interface of the touch screen 1, and then click the cylinder no-load resistance test button displayed on the main menu interface of the touch screen 1 to enter the cylinder no-load resistance test interface; at this time, the force value on the cylinder no-load resistance test interface is displayed as 0; click the cylinder no-load resistance forward test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance forward test, and the PLC controller 13 controls the brushless motor 17 to drive the screw 7 to rotate. The rotation of the screw 7 drives the sensor mounting seat 8 to move from left to right along the strip hole 6, so that the push-pull hook 9 pushes the slider of the rodless cylinder to be tested. The block moves to the right at a constant speed and stops after reaching the test distance; click the cylinder no-load resistance reverse test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance reverse test, and the PLC controller 13 controls the brushless motor 17 to drive the screw 7 to rotate. The rotation of the screw 7 drives the sensor mounting seat 8 to move from right to left along the strip hole 6, so that the push-pull hook 9 pulls the slider of the rodless cylinder to be tested to move to the left at a constant speed and stops after reaching the test distance; during the cylinder no-load resistance forward test and reverse test, the force sensor 10 installed on the top of the sensor mounting seat 8 senses the force generated during the push-pull process, and sends the force value to the PLC controller 13. The PLC controller 13 stores the force value and sends it to the cylinder no-load resistance test interface on the touch screen 1 for display;

[0031] (3) Click the return button on the touch screen 1 to return to the main menu interface of the touch screen 1; disconnect the push-pull hook 9 from the slider of the rodless cylinder to be tested; remove the rodless cylinder to complete the test.

[0032] In the cylinder no-load resistance test, this embodiment is provided with two photoelectric switches 12 for sensing the moving position of the push-pull hook 9. The two photoelectric switches 12 respectively sense the position of the push-pull hook 9 moving to the rightmost end and the leftmost end during the forward test and reverse test of the cylinder no-load resistance. The PLC controller 13 controls the start and stop of the brushless motor 17 according to the signal of the photoelectric switch 12. When the PLC controller 13 controls the start and stop of the brushless motor 17, the circuit on and off of the brushless motor 17 can be controlled by the relay 19.

[0033] During the cylinder pressure-maintaining test of this embodiment, the power indicator light on the test bench 5 is on and the pressure-maintaining test indicator light is on; after the cylinder pressure-maintaining test is stopped, the power indicator light on the test bench 5 is on and the pressure-maintaining test indicator light is off; the pressure-maintaining test indicator light can intuitively remind the operator that the test process is in progress, prevent accidents, and improve safety.

[0034] During the forward test and reverse test of the cylinder no-load resistance in this embodiment, the power indicator light on the test bench 5 is on and the no-load resistance test indicator light is on; after stopping the forward test and reverse test of the cylinder no-load resistance, the power indicator light on the test bench 5 is on and the no-load resistance test indicator light is off; the no-load resistance test indicator light can intuitively remind the operator that the test process is in progress, prevent accidents and improve safety.

[0035] The test process of the present invention is simple and convenient to operate and is carried out automatically. The result data of the test is intuitively visualized and automatically recorded and stored, which is convenient for later reference, thereby improving product production efficiency and product quality. One person can operate it, freeing up manual labor and improving the accuracy of the test.

[0036] The above is only a preferred embodiment of the patent of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the patent of the present invention. These improvements and modifications should also be regarded as the scope of protection of the patent of the present invention.

Claims

1. A pressure holding and no-load resistance test device for a rodless cylinder, characterized by: The test bench comprises a test bench, wherein a strip hole is formed on the table top of the test bench, and a left fixing seat and a right fixing seat are respectively provided on the table top in front of both ends of the strip hole, and both ends of the rodless cylinder to be tested are connected to the left fixing seat and the right fixing seat respectively; a lead screw is provided at the bottom of the table top below the strip hole, and a brushless motor for driving the lead screw to rotate is provided at one end of the lead screw, a sensor mounting seat is threadedly connected to the lead screw, the top of the sensor mounting seat extends upward in the strip hole, and a force sensor is installed on the top of the sensor mounting seat, and a push-pull hook connected to the slider of the rodless cylinder to be tested is installed on the force-bearing surface of the force sensor; the brushless motor drives the lead screw to rotate, and the rotation of the lead screw drives The sensor mounting seat moves back and forth left and right along the strip hole, causing the push-pull hook to push and pull the slider of the rodless cylinder to be tested to move back and forth left and right, and the force sensor installed on the top of the sensor mounting seat is used to sense the force generated during the push-pull process; it also includes a power module, a PLC controller, a touch display, a pilot solenoid valve, a pressure sensor, a start switch and multiple indicator lights, wherein the touch display, the start switch and the multiple indicator lights are arranged on the test bench, the power module is used to supply power, the touch display, the pressure sensor, the start switch and the force sensor are connected to the PLC controller, and the PLC controller controls the pilot solenoid valve, the multiple indicator lights and the brushless motor; The experimental method for the pressure holding and no-load resistance test device of the rodless cylinder comprises the following steps: (1) Cylinder pressure test: First, connect the two ends of the rodless cylinder to be tested to the left and right fixed seats respectively; turn on the external air source switch and connect the air pipe to the rodless cylinder to be tested; press the start switch of the test bench and the power indicator light will light up; click the cylinder pressure test button displayed on the main menu interface of the touch screen to enter the cylinder pressure test interface; at this time, the air pressure value on the cylinder pressure test interface is 0; click the cylinder pressure test button displayed on the cylinder pressure test interface, and the PLC controller controls the pilot solenoid valve to energize, so that the air pipe is inflated into the rodless cylinder to be tested, and set The pressure sensor on the air pipe detects the change in the air pressure value in the rodless cylinder to be tested and sends the air pressure value to the PLC controller. The PLC controller sends the air pressure value to the cylinder pressure test interface on the touch screen for display. When the air pressure value reaches the requirement, the PLC controller controls the pilot solenoid valve to cut off the power, so that the air pipe stops inflating the rodless cylinder to be tested; the cylinder pressure holding test starts, and when the pressure holding time is reached, the cylinder pressure holding test is stopped; the PLC controller records the air pressure value change and pressure holding time in the rodless cylinder to be tested, and finally releases the air pressure in the rodless cylinder to be tested; (2) Cylinder no-load resistance test: Remove the air pipe connected to the rodless cylinder to be tested, and then connect the push-pull hook to the slider of the rodless cylinder to be tested; click the return button on the touch screen to return to the main menu interface of the touch screen, and then click the cylinder no-load resistance test button displayed on the main menu interface of the touch screen to enter the cylinder no-load resistance test interface; at this time, the force value on the cylinder no-load resistance test interface is displayed as 0; click the cylinder no-load resistance forward test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance forward test. The PLC controller controls the brushless motor to drive the screw to rotate. The screw rotation drives the sensor mounting seat to move from left to right along the strip hole, so that the push-pull hook pushes the rodless cylinder to be tested. The slider moves to the right at a constant speed and stops after reaching the test distance; click the cylinder no-load resistance reverse test button displayed on the cylinder no-load resistance test interface to start the cylinder no-load resistance reverse test, and the PLC controller controls the brushless motor to drive the screw to rotate. The rotation of the screw drives the sensor mounting seat to move from right to left along the strip hole, so that the push-pull hook pulls the slider of the rodless cylinder to be tested to move to the left at a constant speed and stops after reaching the test distance; during the cylinder no-load resistance forward test and reverse test, the force sensor installed on the top of the sensor mounting seat senses the force generated during the push-pull process, and sends the force value to the PLC controller. The PLC controller stores the force value and sends it to the touch screen cylinder no-load resistance test interface for display; (3) Click the return button on the touch screen to return to the main menu interface of the touch screen; disconnect the push-pull hook from the slider of the rodless cylinder to be tested; remove the rodless cylinder to complete the test; Two photoelectric switches for sensing the moving position of the push-pull hook are provided on the rear table at both ends of the strip hole. The two photoelectric switches respectively sense the position of the push-pull hook moving to the rightmost end and the leftmost end during the forward test and reverse test of the cylinder no-load resistance. The photoelectric switches are connected to the PLC controller, and the PLC controller controls the start and stop of the brushless motor according to the signal of the photoelectric switch.

2. A pressure holding and no-load resistance test device for a rodless cylinder according to claim 1, characterized in that: The test bench is also provided with an emergency stop button connected to the PLC controller.

3. A pressure holding and no-load resistance test device for a rodless cylinder according to claim 1, characterized in that: The multiple indicator lights include a power indicator light, a pressure holding test indicator light and a no-load resistance test indicator light.

4. A method for testing pressure holding and no-load resistance of a rodless cylinder according to claim 1, characterized in that: During the cylinder pressure holding test, the power indicator light on the test bench is on and the pressure holding test indicator light is on; after the cylinder pressure holding test is stopped, the power indicator light on the test bench is on and the pressure holding test indicator light is off.

5. A method for testing pressure holding and no-load resistance of a rodless cylinder according to claim 1, characterized in that: During the cylinder no-load resistance forward test and reverse test, the power indicator light on the test bench is on and the no-load resistance test indicator light is on; after stopping the cylinder no-load resistance forward test and reverse test, the power indicator light on the test bench is on and the no-load resistance test indicator light is off.

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