A high-precision heavy-load micro-motion wear detection positioning device

Abstract

The utility model discloses a high accuracy big load micro motion wear detection positioning equipment belongs to material wear detection equipment technical field, including work table, spacing column, fixed plate, air cylinder, sliding board, electromagnetic exciter and friction pair, still be provided with positioning mechanism and cleaning mechanism, and positioning mechanism includes the positioning plate and spacing pin for the preliminary positioning, and is used for the slide frame and vacuum chuck of clamping, and the slide frame is through the trapezoidal block of bottom in the trapezoidal groove of work table top sliding, and vacuum chuck is communicated with air pump one through the air pipe, and cleaning mechanism includes air pump two, air inlet pipe, fixed block and air knife, and air knife is used for the detection area of air blowing and purging. The utility model discloses through positioning mechanism, solved the workpiece positioning inaccuracy under big load, the problem of unstable clamping, reached the effect of high accuracy stable clamping, through cleaning mechanism, solved the problem of wear particle interference detection, ensured the accuracy of detection data.

Description

Technical Field

[0001] This utility model relates to the technical field of material wear detection equipment, and in particular to a high-precision, high-load micro-motion wear detection and positioning device. Background Technology

[0002] Fretting wear refers to the material damage phenomenon caused by the micron-level relative reciprocating motion between two contact surfaces under normal load. In order to accurately evaluate the fretting wear resistance of materials, specialized fretting wear detection equipment is needed to simulate this process.

[0003] In fretting wear testing experiments, in order to ensure the accuracy and repeatability of the test data, the workpiece to be tested must be positioned with high precision and clamped extremely firmly. This requires the clamping system to have very high rigidity so that, during the testing process, apart from the preset micron-level relative movement between the friction pair and the workpiece contact interface, the workpiece body should not experience any unexpected macroscopic displacement or vibration.

[0004] However, existing positioning and clamping technologies face severe challenges when performing detection tasks that require both high precision and heavy loads. When the equipment applies a heavy load of normal pressure, the friction pair generates huge, high-frequency alternating shear forces when performing tangential micro-movements.

[0005] Existing workpiece positioning mechanisms, such as conventional mechanical clamps or jigs, often lack sufficient clamping rigidity when subjected to such enormous alternating shear forces. They cannot completely suppress the minute movements or vibrations of the workpiece. Although such unexpected displacements are small, they are fatal for high-precision micron-level detection. They severely interfere with the measurement of the true micro-displacement, leading to distorted detection data and failing to accurately reflect the true wear characteristics of the material.

[0006] Therefore, this utility model proposes a high-precision, high-load micro-motion wear detection and positioning device to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems existing in the high-precision, high-load fretting wear detection and positioning equipment, such as the difficulty in achieving high-precision stable clamping and positioning of the workpiece under high load testing, and the wear particles generated during the detection process adhering to the contact interface and interfering with the accuracy of the detection data, this utility model aims to provide a high-precision, high-load fretting wear detection and positioning equipment with an improved structure that can effectively solve the above problems.

[0008] This utility model provides a high-precision, high-load micro-motion wear detection and positioning device, comprising: a worktable; at least two vertically arranged limiting columns on the top of the worktable; a fixed plate fixedly connected to the top of the limiting columns; a cylinder installed on the top of the fixed plate; a sliding plate slidably sleeved on the outer wall of the limiting columns, the sliding plate being drivenly connected to the output end of the cylinder; an electromagnetic vibrator fixedly connected to the bottom of the sliding plate; and a friction pair fixedly connected to the bottom of the electromagnetic vibrator.

[0009] The micro-motion wear detection and positioning equipment also includes a positioning mechanism located on the top of the worktable.

[0010] The positioning mechanism includes a positioning plate fixedly connected to the top of the workbench, and a limit pin is fixedly connected to the top of the positioning plate.

[0011] Furthermore, the positioning mechanism also includes a sliding frame that is slidably connected to the top of the worktable. A vacuum suction cup is fixedly connected to the inner side of the sliding frame, and the vacuum suction cup is connected to an air pump through a suction pipe.

[0012] Preferably, the top of the workbench is provided with a trapezoidal groove extending in the front-to-back direction, and a trapezoidal block is fixedly connected to the bottom of the sliding frame. The trapezoidal block slides in conjunction with the trapezoidal groove. This structural design utilizes the limiting characteristics of the trapezoidal structure to effectively prevent the sliding frame from displacing vertically when subjected to force, thus ensuring the stability of the positioning.

[0013] Preferably, it also includes a cleaning mechanism, which includes an air pump two for generating positive pressure airflow. The air pump two is connected to the fixed block through an air inlet pipe. An air knife is fixedly connected to the front side of the fixed block for spraying airflow to clean the surface of the workpiece during the inspection process.

[0014] Preferably, as a specific arrangement of the cleaning mechanism, the fixing block is fixedly connected to the outside of the sliding frame, and the air outlet of the air knife faces the top of the positioning plate. This arrangement allows the cleaning airflow to be accurately aimed at the detection area of ​​the workpiece, improving the efficiency of removing grinding debris.

[0015] Preferably, a wear-resistant bushing is fixedly connected to the bottom of the friction pair. The wear-resistant bushing is made of wear-resistant material and is used to reduce the generation of wear particles when the friction pair comes into contact with the workpiece. This design reduces particle interference caused by the wear of the friction pair itself from the source.

[0016] Preferably, the sliding frame has an air passage inside, one end of which is connected to the air extraction pipe, and the other end of which is connected to the air intake of the vacuum suction cup. The air passage serves as an internal pipeline for extracting gas from the vacuum suction cup, making the structure more compact.

[0017] Preferably, there are four limiting posts, which are symmetrically distributed around the top of the worktable. The sliding plate is slidably fitted onto the outer wall of the four limiting posts through the sleeve holes. This multi-point symmetrical guide structure significantly improves the stability and anti-deflection ability of the sliding plate during the up and down sliding process.

[0018] Preferably, both air pump one and air pump two are fixedly connected to the bottom of the workbench. This centralized installation method facilitates the overall layout of the equipment and the connection of pipelines, making the equipment structure more regular.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model solves the problems of inaccurate workpiece positioning and unstable clamping in the prior art, especially the difficulty in ensuring high-precision positioning under heavy load, by setting up a positioning mechanism. The positioning mechanism uses a limit pin for initial positioning and a vacuum suction cup on the sliding frame to adsorb and clamp the workpiece to be tested. At the same time, the sliding fit structure of the trapezoidal block and the trapezoidal groove is used to prevent vertical displacement of the sliding frame. This provides high-precision and high-stability clamping and positioning of the workpiece.

[0021] 2. This utility model, by setting up a cleaning mechanism, uses an air pump to drive an air knife to spray high-pressure airflow to continuously clean the detection area, which solves the problem in the prior art where wear particles generated during the detection process adhere to the contact interface, affecting the accuracy of detection parameters. It cleans wear particles on the workpiece surface in real time, ensuring high accuracy of detection data.

[0022] 3. This utility model solves the problems of particle interference detection caused by the wear of the friction pair itself and insufficient motion stability of the loading mechanism in the prior art by fixing a wear-resistant bushing to the bottom of the friction pair and setting multiple limiting posts to guide the sliding plate to slide up and down. It reduces the generation of wear particles from the source and improves the smooth operation of the loading drive component, thus further ensuring the detection accuracy. Attached Figure Description

[0023] Figure 1 This is a perspective view of a high-precision, high-load micro-motion wear detection and positioning device proposed in this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the sliding plate of a high-precision, high-load micro-motion wear detection and positioning device proposed in this utility model;

[0025] Figure 3 This is a schematic diagram of the positioning mechanism of a high-precision, high-load micro-motion wear detection and positioning device proposed in this utility model;

[0026] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0027] Figure 5 This is a schematic diagram of the cleaning mechanism of a high-precision, high-load micro-motion wear detection and positioning device proposed in this utility model.

[0028] Legend:

[0029] 1. Workbench; 2. Positioning mechanism; 201. Positioning plate; 202. Limit pin; 203. Sliding frame; 204. Trapezoidal block; 205. Trapezoidal groove; 206. Vacuum suction cup; 207. Air extraction pipe; 208. Air pump one; 3. Cleaning mechanism; 301. Fixing block; 302. Air knife; 303. Air inlet pipe; 304. Air pump two; 305. Wear-resistant bushing; 4. Limiting post; 5. Fixing plate; 6. Cylinder; 7. Sliding plate; 8. Electromagnetic vibrator; 9. Friction pair. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example:

[0032] Please refer to Figures 1 to 5 This utility model provides a high-precision, high-load micro-motion wear detection and positioning device, which aims to solve the problem that existing micro-motion wear detection devices cannot achieve high-precision and stable clamping and positioning of workpieces during high-load testing, and that wear particles generated during the testing process adhere to the contact interface and interfere with the accuracy of the detection data.

[0033] like Figure 1 and Figure 2 As shown, a high-precision, high-load micro-motion wear detection and positioning device includes a worktable 1, which serves as the mounting base for the entire device; a loading drive assembly is mounted on the worktable 1, which includes at least two vertically positioned limiting posts 4 on the top of the worktable 1, a fixed plate 5 fixedly connected to the top of the limiting posts 4, a cylinder 6 mounted on the top of the fixed plate 5, and a sliding plate 7; the sliding plate 7 is slidably sleeved on the outer wall of the limiting posts 4, and the sliding plate 7 is drivenly connected to the output end of the cylinder 6; the loading drive assembly is used to drive subsequent components to achieve normal loading; an electromagnetic vibrator 8 is fixedly connected to the bottom of the sliding plate 7, and a friction pair 9 is fixedly connected to the bottom of the electromagnetic vibrator 8; the electromagnetic vibrator 8 is used to drive the friction pair 9 to generate tangential micro-motion.

[0034] Please refer to Figure 1 , Figure 3 and Figure 4 The positioning mechanism 2 includes a positioning plate 201 fixedly connected to the top of the worktable 1. A limit pin 202 is fixedly connected to the top of the positioning plate 201. The limit pin 202 is used for preliminary positioning of the workpiece. The positioning mechanism 2 also includes a sliding frame 203 slidably connected to the top of the worktable 1. In order to guide and limit the sliding frame 203, a trapezoidal groove 205 extending in the front-back direction is provided on the top of the worktable 1. A trapezoidal block 204 is fixedly connected to the bottom of the sliding frame 203. The shape of the trapezoidal block 204 is adapted to the shape of the trapezoidal groove 205, and the trapezoidal block 204 slides in the trapezoidal groove 205. This trapezoidal structure can prevent the sliding frame 203 from vertically displacing when clamped.

[0035] To clamp the workpiece, a vacuum suction cup 206 is fixedly connected to the inner side of the sliding frame 203. To provide negative pressure to the vacuum suction cup 206, the equipment is also equipped with an air pump 208 fixedly connected to the bottom of the worktable 1. The air pump 208 is connected to the sliding frame 203 through an air extraction pipe 207. Specifically, an air passage is opened inside the sliding frame 203. One end of the air passage is connected to the air extraction pipe 207, and the other end of the air passage is connected to the air intake of the vacuum suction cup 206. After the air pump 208 is started, the gas in the vacuum suction cup 206 is extracted through the air extraction pipe 207 and the air passage, so that the vacuum suction cup 206 adsorbs the workpiece and achieves stable clamping and positioning.

[0036] As a preferred implementation method, in order to promptly clean up wear particles generated during the testing process and avoid affecting the testing parameters, please refer to... Figure 1 and Figure 5 The equipment also includes a cleaning mechanism 3; the cleaning mechanism 3 includes an air pump 304 for generating positive pressure airflow, the air pump 304 is connected to the fixed block 301 through an air inlet pipe 303, and an air knife 302 is fixedly connected to the front side of the fixed block 301.

[0037] As a further limitation of the cleaning mechanism 3, in order to ensure that the cleaning airflow is precisely aligned with the workpiece inspection area, the fixing block 301 is fixedly connected to the outside of the sliding frame 203, and the air outlet of the air knife 302 faces the top of the positioning plate 201.

[0038] As another preferred embodiment, in order to reduce the wear of the friction pair 9 itself and reduce particle generation, please refer to... Figure 5 A wear-resistant bushing 305 is fixedly connected to the bottom of the friction pair 9. The wear-resistant bushing 305 is made of wear-resistant material and is used to reduce the generation of wear particles when the friction pair 9 comes into contact with the workpiece.

[0039] As another preferred implementation, to improve the operational stability of the loading driver component, please refer to... Figure 1There are four limiting posts 4, which are symmetrically distributed around the top of the workbench 1. The sliding plate 7 is slidably fitted onto the outer wall of the four limiting posts 4 through the sleeve holes. This arrangement improves the stability of the sliding plate 7 sliding up and down.

[0040] As another preferred embodiment, in order to optimize the equipment layout and centrally install the power source, both air pump 208 and air pump 304 are fixedly connected to the bottom of the workbench 1.

[0041] Working principle: When positioning the workpiece, the workpiece is placed on the limiting pin 202 on the top of the positioning plate 201 to achieve initial positioning. Then, the sliding frame 203 connected to the top of the worktable 1 is pulled. The trapezoidal block 204 at the bottom of the sliding frame 203 slides in the trapezoidal groove 205 on the top of the worktable 1 until the vacuum suction cup 206 inside the sliding frame 203 is in contact with the workpiece. The air pump 208 fixed at the bottom of the worktable 1 is started. The air pump 208 extracts the gas in the vacuum suction cup 206 through the air extraction pipe 207 and the air passage inside the sliding frame 203, so that the vacuum suction cup 206 tightly sucks the workpiece, achieving stable clamping and positioning.

[0042] When performing fretting wear detection, the cylinder 6 installed on the top of the fixed plate 5 is activated. The cylinder 6 pushes the sliding plate 7 connected to the output end. The sliding plate 7 slides down along the outer wall of the four limit posts 4. The sliding plate 7 drives the electromagnetic vibrator 8 fixedly connected to the bottom and the friction pair 9 fixedly connected to the bottom of the electromagnetic vibrator 8 to descend together. When the wear-resistant bushing 305 at the bottom of the friction pair 9 contacts the part of the workpiece to be tested, the electromagnetic vibrator 8 is activated, causing the friction pair 9 to fretting and perform fretting wear detection on the workpiece.

[0043] During the fretting wear detection process, the second air pump 304, which is fixed to the bottom of the worktable 1 to generate positive pressure airflow, is started. The second air pump 304 pumps the gas into the air inlet pipe 303. The gas passes through the fixed block 301 and is finally pressurized and ejected from the air knife 302 fixed to the front of the fixed block 301, which blows away the wear particles on the surface of the workpiece in time, thus solving the problem of wear particles affecting the detection.

Claims

1. A high-precision, high-load micro-motion wear detection and positioning device, comprising: Workbench (1), the workbench (1) is vertically set on the top of the workbench (1) with a limiting post (4), a fixing plate (5) fixedly connected to the top of the limiting post (4), a cylinder (6) installed on the top of the fixing plate (5), a sliding plate (7) slidably sleeved on the outer wall of the limiting post (4), the sliding plate (7) being driven connected to the output end of the cylinder (6), an electromagnetic vibrator (8) fixedly connected to the bottom of the sliding plate (7), and a friction pair (9) fixedly connected to the bottom of the electromagnetic vibrator (8). The device is characterized in that it further includes a positioning mechanism (2) disposed on the top of the workbench (1), the positioning mechanism (2) including a positioning plate (201) fixedly connected to the top of the workbench (1), a limiting pin (202) fixedly connected to the top of the positioning plate (201), the positioning mechanism (2) further including a sliding frame (203) slidably connected to the top of the workbench (1), a vacuum suction cup (206) fixedly connected to the inner side of the sliding frame (203), and the vacuum suction cup (206) being connected to an air pump (208) through an air extraction pipe (207).

2. The high-precision, high-load micro-motion wear detection and positioning device according to claim 1, characterized in that, The top of the workbench (1) is provided with a trapezoidal groove (205) extending in the front-back direction, and the bottom of the sliding frame (203) is fixedly connected with a trapezoidal block (204) that slides in cooperation with the trapezoidal groove (205).

3. The high-precision, high-load micro-motion wear detection and positioning device according to claim 1, characterized in that, The device also includes a cleaning mechanism (3), which includes an air pump (304) for generating positive pressure airflow. The air pump (304) is connected to a fixed block (301) through an air inlet pipe (303). An air knife (302) is fixedly connected to the front side of the fixed block (301).

4. The high-precision, high-load micro-motion wear detection and positioning device according to claim 3, characterized in that, The fixing block (301) is fixedly connected to the outside of the sliding frame (203), and the air outlet of the air knife (302) faces the top of the positioning plate (201).

5. The high-precision, high-load micro-motion wear detection and positioning device according to claim 1, characterized in that, The bottom of the friction pair (9) is fixedly connected to a wear-resistant bushing (305), which is made of wear-resistant material and is used to reduce the generation of wear particles when the friction pair (9) comes into contact with the workpiece.

6. The high-precision, high-load micro-motion wear detection and positioning device according to claim 1, characterized in that, The sliding frame (203) has an air passage inside. One end of the air passage is connected to the air extraction pipe (207), and the other end of the air passage is connected to the air intake of the vacuum suction cup (206) for extracting gas from the vacuum suction cup (206).

7. The high-precision, high-load micro-motion wear detection and positioning device according to claim 1, characterized in that, The number of the limiting posts (4) is four, and they are symmetrically distributed around the top of the workbench (1). The sliding plate (7) is slidably sleeved on the outer wall of the limiting posts (4) through the sleeve hole to improve the stability of the sliding plate (7) sliding up and down.

8. The high-precision, high-load micro-motion wear detection and positioning device according to claim 3, characterized in that, Both the first air pump (208) and the second air pump (304) are fixedly connected to the bottom of the workbench (1).

Images