Magnetorheological fluid plate-liquid interface friction coefficient measuring device and working method thereof
A magneto-rheological fluid and friction coefficient technology, applied in the direction of measuring devices, mechanical devices, instruments, etc., can solve problems such as differences in friction force, achieve high repeatability, simple assembly, and ensure stable pressure
Pending Publication Date: 2022-01-21
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology
The widely used friction measurement method can only measure the friction force of materials under a given special stress state, and the experimental results are too idealized, which is quite different from the actual friction force
Method used
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[0050] The device includes an extrusion head 1 , an extrusion head fixing ring 2 , a sealing ring 3 , a medium chamber 4 , a plate 5 , a wedge-shaped block 6 , a magnetorheological fluid 7 , a coil 8 and a plunger 9 . The extrusion head 1 is an exchangeable device with an extrusion aperture D. The medium bin 4 is divided into two types, and the common point is to place it vertically. In the vertical direction, 4 holes 12 with a diameter of 4-6mm are evenly distributed at the same level. There are 4 groups in total, and the distance between each group is 9-11mm. ; The difference is that there is no slot in the center of the medium bin 4 in the first type, and the slot in the center of the media bin 4 in the second type is used to clamp the plate. The plunger 9 cooperates with the media bin 4 from the bottom of the media bin 4 and is attached with a sealing ring 3 to prevent leakage. The external thread of the extrusion head fixing ring 2 is connected with the medium chamber 4,...
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Abstract
The invention discloses a magnetorheological fluid plate-liquid interface friction coefficient measuring device and a working method thereof, and belongs to the technical field of plate forming. A medium bin is filled with magnetorheological fluid; one end of the medium bin is connected with the extrusion head, and an extrusion hole is formed in the extrusion head; the other end of the medium bin is connected with the plunger, the pressure sensor is arranged at the end of the plunger, and the plunger can do linear displacement under the action of an external power device; an accommodating chamber is arranged at one end, close to the extrusion head, in the medium bin, a to-be-tested plate can be fixed in the accommodating chamber, and a plurality of groups of through-flow holes are formed in the side wall of the accommodating chamber and are distributed in the length direction of the plate; a plurality of through-flow holes in each group of through-flow holes are circumferentially distributed in the side wall of the accommodating chamber; and the coil is sleeved outside the whole medium bin. According to the invention, the three-dimensional stress state of the plate in the real forming process can be simulated, so that the device is close to the actual working condition to the greatest extent, and the measured friction force has important significance for analog simulation, experimental analysis and the like.
Description
technical field [0001] The invention belongs to the technical field of plate forming, and in particular relates to a device for measuring the friction coefficient of a magnetorheological fluid plate-liquid interface and a working method thereof. Background technique [0002] With the rapid development of aviation, aerospace and automotive fields, high requirements for parts such as lightweight, high precision and complex structures have been put forward. Traditional materials and forming technologies can no longer meet the above requirements to a certain extent. The proportion of lightweight and high-strength materials such as magnesium alloys, aluminum alloys, and high-strength steels is gradually increasing. Technically, soft mold forming technology has also begun to be used in actual production. occupies a larger proportion. [0003] Magnetorheological fluid soft mold forming technology is a kind of intelligent medium soft mold forming technology that has reversed rapidl...
Claims
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IPC IPC(8): G01N19/02
CPCG01N19/02
Inventor 王朋义万戈辉王育聪金加庚赵小凯王贤贤
Owner SHAANXI UNIV OF SCI & TECH