Test tool of vertical pressure closed-loop servo system

Abstract

The utility model discloses a test tool of a vertical pressure closed-loop servo system, which comprises a horizontally arranged tool base, a test board arranged on the tool base and used for arranging a target object, and an actuating mechanism arranged on the tool base. And the model of the target object or the pressure sensor can be flexibly replaced.

Description

Technical Field

[0001] This utility model relates to the field of control equipment, specifically to a test fixture for a vertical pressure closed-loop servo system. Background Technology

[0002] Pressure closed-loop servo systems are actuators used in industrial control equipment such as reinforcing machines and mounting machines. They are used to continuously press the target object with constant pressure. The pressure sensor is installed on the pressing mechanism or the pressing base. The pressure feedback signal is connected to the servo drive in the form of an analog signal. The servo drive drives the transmission mechanism to perform the pressing action and adjusts the output in real time according to the pressure sensor feedback signal to achieve pressure closed-loop control.

[0003] The accuracy and stability of pressure control by a pressure closed-loop servo system directly affect the yield rate of the aforementioned equipment, while the speed at which the pressure is adjusted directly impacts the production efficiency. Ideally, a pressure closed-loop servo system can rapidly apply a constant pressure to a target item at a specified pressure value and maintain it for any duration. However, in practical applications, factors such as equipment installation errors, the elasticity of the target item, and sensor accuracy result in a "adjustment time" required to adjust the pressure to the target value, and the "stabilization range" of the pressure after stabilization also varies. Adjustment time and stabilization range are crucial performance indicators of a pressure closed-loop servo system. A qualified pressure closed-loop servo system should control both adjustment time and stabilization range within a reasonable range. Testing these system indicators is called "press performance verification testing."

[0004] Currently, for press performance verification testing of pressure closed-loop servo systems, there is no dedicated tooling. Testing is typically conducted at specific manufacturers or workshops on specific equipment. The disadvantages are as follows: 1) Large equipment size, lacking portability. 2) High equipment cost. 3) A single device usually only adapts to one type of product, and the sensor model used is fixed, lacking flexibility and unable to test performance indicators under various operating conditions. 4) Multi-axis linkage is usually required to complete the pressing action, resulting in complex control methods. Summary of the Invention

[0005] To address the above technical problems, the purpose of this utility model is to provide a test fixture for a vertical pressure closed-loop servo system that is simple in structure, compact, and allows for flexible replacement of target items or pressure sensor models.

[0006] To achieve the above objectives, the technical solution of this utility model is: a test fixture for a vertical pressure closed-loop servo system, comprising a horizontally arranged fixture base, a test platform for setting a target item on the fixture base, and an actuation mechanism on the fixture base. The actuation mechanism includes a servo motor mounting base for detachably connecting the servo motor of the pressure closed-loop servo system, and a pressure sensor for detecting the pressure exerted on the test platform or the target item on it.

[0007] Preferably, the actuation mechanism includes a lead screw module vertically mounted on a tooling base, a slider mounted on the lead screw module and sliding along the length of the lead screw module, and the pressure sensor is mounted on the slider.

[0008] Preferably, a sensor mounting base is fixedly provided on the slider, and the pressure sensor is detachably mounted on the bottom of the sensor mounting base.

[0009] More preferably, the pressure sensor is connected to the sensor mounting base by bolts.

[0010] More preferably, the servo motor mounting base is disposed on the top of the lead screw module.

[0011] More preferably, the lead screw module is provided with at least one photoelectric switch for detecting the position of the slider.

[0012] More preferably, there are 1 photoelectric switch, which correspond to the limit signal position, the origin switch position, and the protection position respectively.

[0013] More preferably, the photoelectric switch is slidably disposed along the length direction of the lead screw module, and is provided with a locking mechanism for locking and unlocking it to the lead screw module.

[0014] More preferably, the test bench is located in the middle of the tooling base, and the pressure sensor is located directly above the test bench.

[0015] Preferably, the tooling base is provided with multiple soft feet underneath.

[0016] The advantages of this utility model are:

[0017] This utility model is small in size and highly portable. It adopts a compact design, with the lead screw module installed vertically. The overall structure is small and lightweight, making it easy to carry and deploy. It can be tested and operated in different locations.

[0018] The equipment has low cost and a simplified structure, reducing the difficulty of manufacturing and assembly.

[0019] High flexibility, supporting quick replacement of different models of pressure sensors and target items, flexibly adapting to various working conditions and testing needs, reducing redundant investment in equipment.

[0020] It is easy to control, using single-axis servo control to reduce the complexity of multi-axis linkage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. The drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the present invention.

[0024] The components include: 1. Tooling base; 101. Soft foot; 2. Test platform; 3. Motion mechanism; 301. Screw module; 302. Sensor mounting base; 303. Pressure sensor; 304. Photoelectric switch; 305. Servo motor; 306. Servo motor mounting base; 307. Bolt. Detailed Implementation

[0025] See appendix Figure 1 As shown, a test fixture for a vertical pressure closed-loop servo system includes a fixture base 1, a test platform 2 mounted on the fixture base, and an action mechanism 3 vertically mounted on the fixture base.

[0026] The actuation mechanism 3 includes a lead screw module 301 vertically mounted on the tooling base, a sensor mounting base 302 mounted on the slider of the lead screw module 301, and a pressure sensor 303 mounted at the bottom of the sensor mounting base 302. The pressure sensor 303 is located directly above the test bench 2 in the vertical direction. When the slider of the lead screw module 301 moves downward, the sensor 303 can apply pressure to the test bench 2 or the target object fixed on the test bench 2. A servo motor mounting base 306 is provided at the top of the lead screw module 301 of the actuation mechanism. The servo motor mounting base 306 is connected to the servo motor 305 of the pressure closed-loop servo system to be tested via a flange. The motor shaft is connected to the lead screw via a coupling. The pressure sensor 303 is mounted at the bottom of the sensor mounting base 302 by bolts 307. To ensure the stability of the device, the test bench 2 is optimally placed in the middle of the tooling base 1.

[0027] In this embodiment, the lead screw module 301 housing is slidably mounted with three photoelectric switches 304, two of which are used as limit signals and one as an origin switch, which facilitates the debugging of tooling actions and protects the pressure sensor 303.

[0028] The four corners of the bottom surface of the tooling base 1 are equipped with soft feet 101 to enhance the stability of the tooling when it is placed.

[0029] In this embodiment, during testing, the servo motor 305 in the pressure closed-loop servo system under test is fixed on the servo motor mounting base 306, and its shaft is connected to the lead screw module 301. The target object is fixed on the test platform 2, which is placed directly below the sensor 303. The pressure sensor 303 and the photoelectric switch 304 signal lines are connected to the pressure closed-loop servo system.

[0030] After installation and connection, the pressure closed-loop servo system is started. The servo motor 305 drives the pressure sensor 303 downward through the lead screw module 301, applying target pressure to the target object on the test bench 2 and maintaining it for a specified time before returning to its original position. This action is repeated, and the control accuracy and stability of the pressure closed-loop servo system are judged based on the pressure value detected by the pressure sensor 303.

Claims

1. A test tool for a vertical pressure closed-loop servo system, comprising a horizontally arranged tool base (1), a test table (2) arranged on the tool base (1) for arranging a target article, a motion mechanism (3) arranged on the tool base (1), characterized in that: The action mechanism (3) comprises a servo motor mounting seat (306) for detachably connecting a servo motor (305) of the pressure closed-loop servo system, and a pressure sensor (303) for detecting the pressure received by the test bench (2) or the target object thereon.

2. The test tool of claim 1, wherein: The action mechanism (3) comprises a lead screw module (301) vertically arranged on the tool base (1), a sliding block arranged on the lead screw module (301) and sliding along the length direction of the lead screw module (301), and the pressure sensor (303) is arranged on the sliding block.

3. The test fixture for a vertical pressure closed loop servo system of claim 2, wherein: A sensor mounting seat (302) is fixedly arranged on the sliding block, and the pressure sensor (303) is detachably arranged at the bottom of the sensor mounting seat (302).

4. The test fixture for a vertical pressure closed loop servo system of claim 3, wherein: The pressure sensor (303) is connected with the sensor mounting seat (302) through a bolt (307).

5. The test fixture for a vertical pressure closed loop servo system of claim 2, wherein: The servo motor mounting seat (306) is arranged at the top of the lead screw module (301).

6. The test fixture for a vertical pressure closed loop servo system of claim 2, wherein: At least one photoelectric switch (304) for detecting the position of the sliding block is arranged on the lead screw module (301).

7. The test fixture of claim 6, wherein: The photoelectric switch (304) is provided with three.

8. The test fixture of claim 6, wherein: The photoelectric switch (304) is slidingly arranged along the length direction of the lead screw module (301), and a locking mechanism for locking and unlocking the photoelectric switch (304) and the lead screw module (301) is arranged on the photoelectric switch (304).

9. The test fixture for a vertical pressure closed loop servo system of claim 5, wherein: The test bench (2) is arranged at the middle of the tool base (1), and the pressure sensor (303) is arranged directly above the test bench (2).

10. The test fixture for a vertical pressure closed loop servo system of claim 1, wherein: A plurality of soft feet (101) are arranged below the tool base (1).

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