A control system and control method of electric cylinder linkage test device

Abstract

A control system and control method of an electric cylinder linkage test device, comprising a hydraulic oil tank, wherein the oil outlet pipeline is connected with an oil pump, two parallel first electromagnetic reversing valves and a second electromagnetic reversing valve in sequence, the other end of the first electromagnetic reversing valve is connected with a first hydraulic motor, the other end of the second electromagnetic reversing valve is respectively connected with a second hydraulic motor, the first hydraulic motor is key-connected to the first electric cylinder, and the second hydraulic motor is key-connected to the second electric cylinder; one end of the return oil pipeline is connected with the oil outlets of the first hydraulic motor and the second hydraulic motor, and the other end of the return oil pipeline is connected to the return oil port of the hydraulic oil tank; the proximity switch sensor, the first proximity switch, the second proximity switch, the oil pump, the first electromagnetic reversing valve and the second electromagnetic reversing valve are electrically connected to an electrical control console, and a counter is provided on the electrical control console; the hydraulic motor is driven by the electrical system to control the operation of the electric cylinder, thereby simplifying the operation process and reducing costs.

Description

Technical Field

[0001] The present invention relates to the technical field of electric cylinder test and in particular to a control system and a control method of an electric cylinder linkage test device. Background Art

[0002] The electric cylinder converts the rotational motion of the motor into a straight line and can achieve high-precision linear motion. Existing electric cylinder tests mostly use a control system to control the servo drive. The servo system drives the servo motor, and then the servo motor controls the electric cylinder for testing. The control is relatively cumbersome and the cost is high. Most electric cylinder manufacturers are oil cylinder manufacturers. Hydraulic control technology is more mature than servo control technology. Using hydraulic motors instead of servo motors for testing is relatively simple to control and can reduce costs. Summary of the invention

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a control method for an electric cylinder linkage test device, which can effectively simplify the test operation process, improve productivity, and reduce production costs.

[0004] Another object of the present invention is to provide an electric cylinder linkage test device control system using the above-mentioned electric cylinder linkage test device control method.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a control system of an electric cylinder linkage test device, characterized in that: it includes a hydraulic oil tank, the oil outlet at one end of the hydraulic oil tank is connected to an oil outlet pipeline, the oil outlet pipeline is sequentially connected to an oil pump, two parallel first electromagnetic reversing valves and a second electromagnetic reversing valve, the other end of the first electromagnetic reversing valve is connected to a first hydraulic motor, the other end of the second electromagnetic reversing valve is respectively connected to a second hydraulic motor, the first hydraulic motor is keyed to the first electric cylinder, the second hydraulic motor is keyed to the second electric cylinder, the first electric cylinder and the second electric cylinder are arranged in parallel on a test bench, and the test A first proximity switch is arranged at the front end of the test bench, and a second proximity switch is arranged at the middle part of the test bench. A proximity switch inductor is respectively installed at the front end of the first electric cylinder and the second electric cylinder. One end of the return oil pipeline is connected to the oil outlet of the first hydraulic motor and the second hydraulic motor, and the other end of the return oil pipeline is connected to the return oil port of the hydraulic oil tank. The return oil pipeline passes through two parallel first electromagnetic reversing valves and second electromagnetic reversing valves respectively. An electrical control console is also included. The proximity switch inductor, the first proximity switch, the second proximity switch, the oil pump, the first electromagnetic reversing valve and the second electromagnetic reversing valve are electrically connected to the electrical control console, and a counter is arranged on the electrical control console.

[0006] As a preferred embodiment of the present invention, an electromagnetic overflow valve is arranged on a branch line of the oil outlet pipeline between the oil pump and the two parallel first electromagnetic reversing valves and the second electromagnetic reversing valves, the overflow port of the electromagnetic overflow valve is connected back to the hydraulic oil tank through a pipeline, and the electromagnetic overflow valve is electrically connected to the electrical control console.

[0007] As a preferred solution of the present invention, the cylinder seats of the first electric cylinder and the second electric cylinder are fixed to the test bench by bolts.

[0008] As a preferred solution of the present invention, a pressure plate is respectively provided at both ends of the first electric cylinder and the second electric cylinder, and the pressure plate is fixed to the test bench with bolts.

[0009] The control method of the electric cylinder linkage test device of the present invention comprises the following steps:

[0010] Step 1) The electrical control console controls the electrical system to be energized, the oil pump is started, and the electromagnetic relief valve and the first electromagnetic reversing valve and the second electromagnetic reversing valve are energized;

[0011] Step 2) The high-pressure hydraulic oil drawn by the oil pump from the hydraulic oil tank enters the first hydraulic motor and the second hydraulic motor through the corresponding valve ports of the first electromagnetic reversing valve and the second electromagnetic reversing valve, controls the first hydraulic motor and the second hydraulic motor to work, and drives the first electric cylinder and the second electric cylinder screw rod to extend synchronously;

[0012] Step 3) The first electric cylinder and the second electric cylinder lead screw extend, and when the proximity switch induction body reaches the second proximity switch, the second proximity switch on signal is sent to the electrical control console, and the electrical control console controls the first electromagnetic reversing valve and the second electromagnetic reversing valve to switch on after a delay, and the high-pressure hydraulic oil drawn from the hydraulic oil tank by the oil pump enters the first hydraulic motor and the second hydraulic motor through the corresponding valve ports of the first electromagnetic reversing valve and the second electromagnetic reversing valve, controls the reversing work of the first hydraulic motor and the second hydraulic motor, and drives the lead screws of the first electric cylinder and the second electric cylinder to retract synchronously;

[0013] Step 4) The first electric cylinder and the second electric cylinder lead screw retract to the first proximity switch. When the proximity switch induction body reaches the first proximity switch, the first proximity switch on signal is sent to the electrical control console. The electrical control console counter completes one count and controls the first electromagnetic reversing valve and the second electromagnetic reversing valve to be energized and switched again after a delay.

[0014] Step 5) Repeat steps 2) to 4);

[0015] Step 6) After the electrical console counter reaches the number of tests, the electrical console controls the oil pump to stop, the electrical system is powered off, and the action ends.

[0016] The beneficial effect of the present invention is that, compared with the prior art, the present invention drives the hydraulic motor to control the operation of the electric cylinder through the electrical system, instead of driving the servo motor to control the operation of the electric cylinder through the servo controller, thereby simplifying the operation process and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the hydraulic system of the present invention;

[0019] In the figure: 1-1, first electric cylinder; 1-2, second electric cylinder; 2, pressure plate; 3, cylinder seat; 4, test bench; 5, key; 6, proximity switch sensor; 7, electrical control console; 8-1, first proximity switch; 8-2, second proximity switch; 9, oil pump; 10-1, first hydraulic motor; 10-2, second hydraulic motor; 11-1, first solenoid reversing valve; 11-2, second solenoid reversing valve; 12, solenoid overflow valve; 13, hydraulic oil tank. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are now described clearly and completely in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner.

[0021] according to Figure 1 As shown, the first electric cylinder 1-1 and the second electric cylinder 1-2 are fixed on the test bench 4 in parallel through the pressure plate 2 and the cylinder seat 3, the rear end of the first electric cylinder 1-1 is connected to the first hydraulic motor 10-1 through the key 5, and the rear end of the second electric cylinder 1-2 is connected to the second hydraulic motor 10-2 through the key 5, and the front ends of the first electric cylinder 1-1 and the second electric cylinder 1-2 are respectively installed with a mutually symmetrical proximity switch sensor 6, a first proximity switch 8-1 is arranged at the front end of the test bench 4, and a second proximity switch 8-2 ​​is arranged in the middle of the test bench 4, and the proximity switch sensor 6, the first proximity switch 8-1, and the second proximity switch 8-2 ​​are electrically connected to the electrical control console 7.

[0022] according to Figure 2As shown, it includes a hydraulic oil tank 13, and the oil outlet at one end of the hydraulic oil tank 13 is connected to an oil outlet pipeline, and the oil outlet pipeline is sequentially connected to an oil pump 9, two parallel first electromagnetic reversing valves 11-1 and second electromagnetic reversing valves 11-2, the other end of the first electromagnetic reversing valve 11-1 is connected to a first hydraulic motor 10-1, and the other end of the second electromagnetic reversing valve 11-2 is respectively connected to a second hydraulic motor 10-2, and the oil pump 9 is connected to the two parallel first electromagnetic reversing valves 11-1 and the second electromagnetic An electromagnetic overflow valve 12 is arranged on a branch line of the oil outlet pipeline between the reversing valves 11-2. The overflow port of the electromagnetic overflow valve 12 is connected back to the hydraulic oil tank 13 through a pipeline. The electromagnetic overflow valve 12 is controlled by the electrical control console 7. One end of the return oil pipeline is connected to the oil outlets of the first hydraulic motor 10-1 and the second hydraulic motor 10-2, and the other end of the return oil pipeline is connected to the return oil port of the hydraulic oil tank 13. The return oil pipeline passes through two parallel first electromagnetic reversing valves 11-1 and second electromagnetic reversing valves 11-2 respectively.

[0023] The working process of the system:

[0024] (1) The electrical control console 7 controls the electrical system to be energized, the oil pump 9 is started, and the electromagnetic relief valve 12 and two sets of electromagnetic reversing valves (the first electromagnetic reversing valve 11-1 and the second electromagnetic reversing valve 11-2) are energized;

[0025] (2) The high-pressure hydraulic oil drawn from the hydraulic oil tank by the oil pump 9 enters the first hydraulic motor 10-1 and the second hydraulic motor 10-2 through the corresponding valve ports of the first solenoid reversing valve 11-1 and the second solenoid reversing valve 11-2 of the two sets of electromagnetic reversing valves, controls the operation of the first hydraulic motor 10-1 and the second hydraulic motor 10-2, and drives the screw rods of the first electric cylinder 1-1 and the second electric cylinder 1-2 to extend synchronously;

[0026] (3) The screw rods of the first electric cylinder 1-1 and the second electric cylinder 1-2 extend. When the proximity switch induction body 6 reaches the second proximity switch 8-2, the second proximity switch 8-2 ​​connection signal is sent to the electrical control console 7. After a delay, the electrical control console 7 controls the two sets of electromagnetic reversing valves, the first electromagnetic reversing valve 11-1 and the second electromagnetic reversing valve 11-2, to be energized and switched. The high-pressure hydraulic oil drawn by the oil pump 9 from the hydraulic oil tank 13 enters the first hydraulic motor 10-1 and the second hydraulic motor 10-2 through the corresponding valve ports of the two sets of electromagnetic reversing valves, the first electromagnetic reversing valve 11-1 and the second electromagnetic reversing valve 11-2, to control the switching operation of the first hydraulic motor 10-1 and the second hydraulic motor 10-2, and drive the screw rods of the first electric cylinder 1-1 and the second electric cylinder 1-2 to retract synchronously.

[0027] (4) The screw rods of the first electric cylinder 1-1 and the second electric cylinder 1-2 retract to the first proximity switch 8-1. When the proximity switch inductor 6 reaches the first proximity switch 8-1, the first proximity switch 8-1 on signal is sent to the electrical control console 7. The counter of the electrical control console 7 completes one count and controls the two sets of electromagnetic reversing valves (the first electromagnetic reversing valve 11-1 and the second electromagnetic reversing valve 11-2) to be energized and switched again after a delay.

[0028] (5) Repeat steps (2) to (4);

[0029] (6) When the counter of the electrical control console 7 reaches the number of tests, the electrical control console 7 controls the oil pump 9 to stop, the electrical system is powered off, and the action ends.

[0030] The two groups of electric cylinders and the two groups of hydraulic motors described in the present invention ensure the synchronization consistency of the linkage test of the two groups of electric cylinders through mechanical rigid connection, hydraulic motor matching and selection, and electrical system control.

[0031] The present invention drives the hydraulic motor to control the operation of the electric cylinder through the electrical system, replacing the original method of driving the servo motor to control the operation of the electric cylinder through the servo controller, thereby simplifying the operation process and reducing the cost.

Claims

1. A control system for an electric cylinder linkage test device, characterized in that: The invention comprises a hydraulic oil tank (13), wherein an oil outlet at one end of the hydraulic oil tank (13) is connected to an oil outlet pipeline, wherein the oil outlet pipeline is sequentially connected to an oil pump (9), two parallel first electromagnetic reversing valves (11-1) and a second electromagnetic reversing valve (11-2), wherein the other end of the first electromagnetic reversing valve (11-1) is connected to a first hydraulic motor (10-1), and the other end of the second electromagnetic reversing valve (11-2) is respectively connected to a second hydraulic motor (10-2), wherein the first hydraulic motor (10-1) is key-connected to the first electric cylinder (1-1), and the second hydraulic motor (10-2) is key-connected to the second electric cylinder (1-2), wherein the first electric cylinder (1-1) and the second electric cylinder (1-2) are arranged in parallel on a test bench (4), wherein a first proximity switch (8-1) is arranged at the front end of the test bench (4), and wherein the test bench (4) a second proximity switch (8-2) is arranged in the middle, and a proximity switch inductor (6) is respectively installed at the front end of the first electric cylinder (1-1) and the second electric cylinder (1-2); one end of the return oil pipeline is connected to the oil outlet of the first hydraulic motor (10-1) and the second hydraulic motor (10-2), and the other end of the return oil pipeline is connected to the return oil port of the hydraulic oil tank (13), and the return oil pipeline passes through two parallel first electromagnetic reversing valves (11-1) and second electromagnetic reversing valves (11-2); and also includes an electrical control console (7), the proximity switch inductor (6), the first proximity switch (8-1), the second proximity switch (8-2), the oil pump (9), the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2) are electrically connected to the electrical control console (7), and a counter is arranged on the electrical control console (7); An electromagnetic overflow valve (12) is arranged on a branch of an oil outlet pipeline between the oil pump (9) and the two parallel-connected first electromagnetic reversing valves (11-1) and second electromagnetic reversing valves (11-2); an overflow port of the electromagnetic overflow valve (12) is connected back to the hydraulic oil tank (13) through a pipeline; and the electromagnetic overflow valve (12) is electrically connected to the electrical control console (7); The cylinder seats (3) of the first electric cylinder (1-1) and the second electric cylinder (1-2) are fixed to the test bench (4) by bolts.

2. The control system of an electric cylinder linkage test device according to claim 1, characterized in that: A pressure plate (2) is provided at each end of the first electric cylinder (1-1) and the second electric cylinder (1-2), and the pressure plate (2) is fixed to the test bench (4) by bolts.

3. A control method for an electric cylinder linkage test device using the electric cylinder linkage test device control system according to claim 1 or 2, characterized in that: Step 1) The electrical control console (7) controls the electrical system to be energized, the oil pump (9) is started, and the electromagnetic overflow valve (12) and the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2) are energized; Step 2) the high-pressure hydraulic oil drawn from the hydraulic oil tank by the oil pump (9) enters the first hydraulic motor (10-1) and the second hydraulic motor (10-2) through the corresponding valve ports of the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2), controls the operation of the first hydraulic motor (10-1) and the second hydraulic motor (10-2), and drives the screw rods of the first electric cylinder (1-1) and the second electric cylinder (1-2) to extend synchronously; Step 3) The screw rods of the first electric cylinder (1-1) and the second electric cylinder (1-2) extend, and when the proximity switch induction body (6) reaches the second proximity switch (8-2), the second proximity switch (8-2) connection signal is sent to the electrical control console (7), and the electrical control console (7) controls the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2) to be energized and switched after a delay, and the high-pressure hydraulic oil drawn from the hydraulic oil tank (13) by the oil pump (9) enters the first hydraulic motor (10-1) and the second hydraulic motor (10-2) through the corresponding valve ports of the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2), controls the first hydraulic motor (10-1) and the second hydraulic motor (10-2) to switch, and drives the screw rods of the first electric cylinder (1-1) and the second electric cylinder (1-2) to be retracted synchronously; Step 4) The screw rods of the first electric cylinder (1-1) and the second electric cylinder (1-2) are retracted to the first proximity switch (8-1). When the proximity switch induction body (6) reaches the first proximity switch (8-1), a first proximity switch (8-1) on signal is sent to the electrical control console (7). The counter of the electrical control console (7) completes one count and after a delay, the first electromagnetic reversing valve (11-1) and the second electromagnetic reversing valve (11-2) are controlled again to energize and reverse. Step 5) Repeat steps 2) to 4); Step 6) After the counter of the electrical control console (7) reaches the number of tests, the electrical control console (7) controls the oil pump (9) to stop, the electrical system is powered off, and the operation ends.

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