Double-station explosion-proof electromagnet multi-performance test equipment

Abstract

A double-station explosion-proof electromagnet multi-performance test device comprises a rack, a double-station explosion-proof electromagnet positioning mechanism is installed on the rack, two linear modules driven by servo motors are installed on the rack in parallel, force sensors are fixedly installed on action parts of the two linear modules, and after a double-station explosion-proof electromagnet is positioned through the positioning mechanism, the force sensors are driven by the servo motors to act on the double-station explosion-proof electromagnet. The two push rods on the double-station explosion-proof electromagnet correspond to the force sensors respectively, the servo motor can drive the linear module to enable the ends of the force sensors to cover the starting ends and the tail ends of the strokes of the push rods, and the force sensors and the servo motor are both connected to a controller to be controlled. The test equipment is simple in structure, and can complete multiple performance tests of the double-station explosion-proof electromagnet on the same equipment.

Description

Technical Field

[0001] The invention relates to electromagnet testing equipment, in particular to double-station explosion-proof electromagnet multi-performance testing equipment, belonging to the technical field of electromagnet testing equipment. Background Art

[0002] The double-station explosion-proof electromagnet is a widely used electromagnet because hydraulic pressure is widely used in mining, construction support and other occasions, and this electromagnet is a must-have on hydraulic supports, so the market demand for its use on hydraulic supports is very large. After manufacturing, it is necessary to conduct a variety of performance (characteristic) tests, such as coil resistance, response time (power-on response time, power-off response time), FS curve, whether the wiring is correct (in the production and manufacturing, the coils of the two electromagnets are all manually wired, and wiring errors, reversals, etc. may occur in production) and whether the action is stuck. The existing tests of these characteristics are all tested by separate dedicated equipment, such as coil resistance requires resistance Tester measurement; power-on and power-off responses require installation on an electromagnet response tester (this instrument uses a displacement sensor to measure the electromagnet push rod displacement signal and the electromagnet power-on and power-off signals, and is connected to an oscilloscope). Using an oscilloscope to manually observe the electromagnet's power-on and power-off response times is subject to significant human error. Wiring sequence testing requires installation on a hydraulic valve test bench to observe correct cylinder movement, which is complex and time-consuming. For the FS curve, the electromagnet must be installed on an electromagnet curve characteristic tester, using displacement sensors and force sensors to measure the FS curve. The electromagnet's sticking performance is typically detected through manual observation, which is significantly affected by operator input. This existing testing method requires extensive testing equipment, occupies a large area, requires multiple product transfers, and is subject to human influence. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned problems existing in the current double-station explosion-proof electromagnet performance test and provide a double-station explosion-proof electromagnet multi-performance testing device.

[0004] To achieve the purpose of the present invention, the following technical solutions are adopted: a double-station explosion-proof electromagnet multi-performance testing equipment, including a frame, a double-station explosion-proof electromagnet positioning mechanism is installed on the frame, and two sets of servo motor-driven linear modules are installed in parallel. Force sensors are fixedly installed on the action parts of the two linear modules. After the double-station explosion-proof electromagnet is positioned by the positioning mechanism, the two push rods on the double-station explosion-proof electromagnet correspond to a force sensor respectively. The servo motor can drive the linear module so that the end of the force sensor covers the starting and end of the push rod stroke. The above-mentioned force sensor and servo motor are all connected to the controller for control.

[0005] Furthermore, the accuracy of the linear module is within plus or minus 0.005 mm, and the response speed of the force sensor is within 0.1 ms.

[0006] Furthermore, the two sets of linear modules are identical.

[0007] The positive and beneficial technical effects of the present invention are: the test equipment has a simple structure and can complete multiple performance tests of double-station explosion-proof electromagnets on the same device, which will be described in detail in conjunction with specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the equipment of the present invention. DETAILED DESCRIPTION

[0009] In order to more fully explain the implementation of the present invention, implementation examples of the present invention are provided. These implementation examples are merely elaborations of the present invention and do not limit the scope of the present invention.

[0010] The marks in the attached figure are: 1: frame; 2: double-station explosion-proof electromagnet; 3: push rod A; 4: push rod B; 6: servo motor B; 6: servo motor A; 7: linear module A; 8: linear module B; 9: force sensor A; 10: force sensor B.

[0011] The electromagnet positioning mechanism in this application can take a variety of forms. The positioning mechanism in this application requires that after positioning the double-station explosion-proof electromagnet (also referred to as the electromagnet in this application), the two push rods can respectively align with the two force sensors (i.e., the push rods and the corresponding force sensors can interfere with each other within the electromagnet's travel). Therefore, the positioning accuracy requirements are not high. The double-station electromagnet itself has four holes, which are used as positioning holes in this application. Four corresponding positioning pins are fixedly installed on the frame, and the positioning pins and positioning holes cooperate to form a positioning mechanism. In addition to the positioning mechanism described above, other positioning mechanisms can also be used. For example, a positioning end face (to position the electromagnet in the length direction) and a positioning side face (to position the electromagnet in the width direction) can be fixed on the frame. A clamping cylinder can be installed on the frame, and the clamping cylinder's lever has a clamping claw. After the electromagnet is positioned by the positioning end face and positioning side face, it can be clamped by the clamping cylinder. This method is easy to understand and implement and is not shown in the figure.

[0012] As shown in the accompanying drawings, a double-station explosion-proof electromagnet multi-performance testing equipment includes a frame 1, a double-station explosion-proof electromagnet positioning mechanism is installed on the frame, a double-station explosion-proof electromagnet 2 is located on the positioning mechanism, and two sets of servo motor-driven linear modules are installed in parallel. The accuracy of the linear modules is within plus or minus 0.005mm. In this embodiment, the two sets of linear modules are identical. Force sensors are fixedly installed on the action parts of the two linear modules. The response speed of the force sensor is within 0.1ms. After the double-station explosion-proof electromagnet is positioned by the positioning mechanism, the two on the double-station explosion-proof electromagnet Each push rod corresponds to a force sensor. In the figure, the two servo motors are servo motor A5 and servo motor B6 respectively. The linear module A7 is driven by servo motor A5, and the force sensor A9 is located on the action part of the linear module A7. The sensor A9 corresponds to the push rod A4. The linear module B8 is driven by servo motor B6, and the force sensor B10 is located on the action part of the linear module B8. The force sensor B10 corresponds to the push rod B3. The servo motor can drive the linear module so that the end of the force sensor covers the beginning and end of the push rod stroke. The above-mentioned force sensors and servo motors are all connected to the controller for control. There are two coils in the double-station electromagnet, of which coil A corresponds to push rod A; coil B corresponds to push rod B.

[0013] The above-mentioned device is set in a coordinate system along the motion direction of the linear module, which can be a one-dimensional coordinate system.

[0014] Method for determining the wiring sequence: control servo motor A and servo motor B to drive the corresponding linear module to drive the corresponding force sensor to move to the stroke coordinate range of the corresponding push rod (excluding the starting and end ends); test to meet the following conditions at the same time to determine that the wiring sequence of the electromagnet is correct: Condition 1: After the two coils are energized at the same time, the two force sensors have force values, and after the two coils are de-energized, the force values of the two force sensors are 0; Condition 2: When coil A is energized and coil B is de-energized, force sensor A has a force value and force sensor B has a force value of 0; Condition 3: When coil B is energized and coil A is de-energized, force sensor B has a force value and force sensor A has a force value of 0. The above force values are detected within 1 second after power on and off. If any of the above three conditions is not met, the wiring sequence is determined to be incorrect.

[0015] When the solenoid wire sequence is correct, perform the following characteristic tests:

[0016] 1. The test method of the electromagnet response time includes the following steps: S1: Control servo motor A and servo motor B to operate so that the force sensor is out of the stroke coordinate range of the corresponding push rod, and energize coil A and coil B of the electromagnet; at this time, the force values of force sensor A and force sensor B are both 0; S2: Control servo motor A and servo motor B to drive the corresponding force sensor to approach the corresponding electromagnet push rod at a speed of 0.5-1.5mm / s. When the force value of force sensor A is greater than 1N, servo motor A stops. When the force value of force sensor B is greater than 1N, servo motor B stops. After the S3 servo motor stops, it retreats away from the push rod at a speed of 0.05-0.1mm / s. When the force value of force sensor A is less than 1N, the servo motor A stops. At this time, the coordinate position D1 corresponding to the linear module A is the electromagnet closing point of the push rod A station. When the force value of force sensor B is less than 1N, the servo motor B stops. At this time, the coordinate position D2 corresponding to the linear module B is the electromagnet closing point of the push rod B station. S4: Coil A and coil B are powered off; servo motor A is controlled to drive linear module A to move 0.1mm from point D1 toward push rod A, and the coordinate D of linear module A at the test point of push rod A response time is obtained. 11 ; Control servo motor B to drive linear module B to move 0.1mm from point D2 toward push rod B; obtain the linear module B coordinate D of the push rod B response time test point 21 S5: Linear module A is located at D 11 At this point, coil A is energized, the energization time is ta1, the time when the force sensor A's force value is greater than 1N is ta2, and the response time of the push rod A position is ta2-ta1; the linear module B is located at D 21 At tb1, coil B is energized, the energization time is tb1, the time when the force value of force sensor B is greater than 1N is tb2, and the response time of push rod B position is tb2-tb1.

[0017] 2. The FS curve test method includes the following steps: T1: Obtain the coordinate position D1 of the electromagnet closing point linear module A and the coordinate position D2 of the linear module B through steps S1, S2, and S3 of the electromagnet response time test method; T2: Both coils of the electromagnet are powered off; push rods A and B are reset; T3: Based on D1, D2 and the stroke of push rod A and push rod B, the coordinate A1 of the linear module A after push rod A is reset and the coordinate A2 of the linear module B after push rod B is reset are obtained; T4: Servo motor A drives linear module A to coordinate A1, energizes coil A, and drives the force sensor to retreat to coordinate position D1 at a speed of 0.05mm / s to 0.1mm / s, and then points away from the push rod. During the retreat, the relationship between the coordinates and the force of sensor A is recorded to obtain the FS curve of the push rod A station; servo motor B drives linear module B to coordinate A2, and drives the force sensor B to retreat to coordinate position D2 at a speed of 0.05mm / s to 0.1mm / s. During the retreat, the relationship between the coordinates and the force of sensor B is recorded to obtain the FS curve of the push rod B station.

[0018] Testing method for electromagnet stuck: BK: Testing method for closing point stuck: K1: Get D through steps S1, S2, S3, and S4 in the test method of electromagnet response time 11 、D 21 ; K2: Servo motor A drives linear modules A to D 11 , Servo motor B drives linear modules B to D 21 ; K3: Energize coil A and coil B. At this time, force sensors A and B both have force values. Then de-energize coil A and coil B. If the force value of force sensor A disappears, it is determined that the workstation corresponding to push rod A is not stuck at the closing point. If the force value of force sensor A does not disappear, it is determined that the workstation corresponding to push rod A is stuck at the closing point. If the force value of force sensor B disappears, it is determined that the workstation corresponding to push rod B is not stuck at the closing point. If the force value of force sensor B does not disappear, it is determined that the workstation corresponding to push rod B is stuck at the closing point.

[0019] XK: Test method for mid-stroke jamming. This test is performed under the condition that both stations tested in step K3 do not jam at the closing point: XK1: After the two coils are powered off, the servo motor A drives the force sensor A to move toward the electromagnet, causing the linear module A to reach coordinate A. 1。 Coordinate A1 is obtained from step T3. If force sensor A has a force value during the movement, it is determined that the push rod A station has a stuck in the stroke; if no force value is output, it is determined that there is no stuck in the stroke; servo motor B drives force sensor B to move toward the electromagnet to make linear module B move to coordinate A2 。 Coordinate A2 is obtained from step T3. If a force value appears in force sensor B during the movement, it is determined that the push rod B station is stuck in the stroke; if no force value appears, it is determined that there is no stuck in the stroke.

[0020] Resistance test method: Use a constant voltage and constant current power supply to pass the same constant current through the double coils of the electromagnet. The electromagnet is attracted. At this time, the voltage at both ends of the coil is tested. The corresponding resistance of the coil is calculated using the volt-ampere method to determine whether the resistance of the coil is qualified.

[0021] After describing the embodiments of the present invention in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. A double-station explosion-proof electromagnet multi-performance testing device, including a frame, characterized by: A double-station explosion-proof electromagnet positioning mechanism is installed on the frame, and two sets of servo motor-driven linear modules are installed in parallel. Force sensors are fixedly installed on the action parts of the two linear modules. After the double-station explosion-proof electromagnet is positioned by the positioning mechanism, the two push rods on the double-station explosion-proof electromagnet correspond to one force sensor respectively. The servo motor can drive the linear module so that the end of the force sensor covers the beginning and end of the push rod stroke. The above-mentioned force sensors and servo motors are all connected to the controller for control.

2. A double-station explosion-proof electromagnet multi-performance testing device according to claim 1, characterized in that: The accuracy of the linear module is within plus or minus 0.005 mm, and the response speed of the force sensor is within 0.1 ms.

3. The double-station explosion-proof electromagnet multi-performance testing equipment according to claim 1, characterized in that: The two sets of linear modules are identical.

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