A fretting friction and wear test device
A technology of wear test and fretting friction, which is applied in the direction of measuring devices, testing wear resistance, instruments, etc., can solve problems such as uneven contact stress, influence of fretting wear, and uniform increase of contact stress, so as to improve the problem of hard contact , Improve the effect of unstable operation and balanced contact pressure
Active Publication Date: 2021-04-13
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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Problems solved by technology
[0003] The form of line / surface and surface / surface contact increases the difficulty of research and testing because it is difficult to achieve sufficient contact and contact stress uniformity
The current line / surface and surface / surface contact test devices almost all adopt the method of processing leveling and hard contact, which is prone to uneven load of force and leads to uneven contact stress, thus affecting the accuracy of the law of fretting wear Research
Method used
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[0019] In order to make the present invention easier to understand, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0020] Such as figure 1 As shown, the line-surface contact test is taken as an example, and all dimensions are in mm. The flat sample 9 has a size of 20×30×5 and is fixed on a micro-movement stage. According to the purpose of the test, the size of the 8 cylinders of the bridge-shaped upper friction pair is φ5×10. At first ball head connecting device 5 is put into ball head locking overcoat 3 from ball groove, and the inner diameter of the lower end outlet of ball head locking overcoat 3 is less than the diameter of ball head, guarantees that ball can not drop. Then tighten the ball cap 2. Insert the rod-shaped upper friction pair 8 into the clamping body 6 of the upper friction pair, and tighten the clamping screw 7 . Tighten the ball head lock jacket and tight...
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The invention discloses a fretting friction and wear test device. It includes a ball-joint locking jacket, a ball-joint connection device and an upper friction pair clamping body connected with the ball-joint connection device. The ball-joint locking jacket is in partial spherical contact with the ball-joint connection device. The spherical part can be rotated in the ball-joint lock jacket, and the upper friction pair clamping body rotates together with the ball-joint connection device, and the upper friction pair clamping body clamps the upper friction pair. The whole device of the device of the present invention has stability during the fretting test movement process. The hard contact problem of the previous line-surface micro-motion device is improved. Even under the action of large external pressure, through the universal adjustment function of the ball head device, after the positive pressure is applied, the contact reaction force will cause the ball head to rotate and drive the cylinder to tilt. The end drops, thereby increasing the contact point, equalizing the contact pressure, and playing a leveling effect.
Description
technical field [0001] The invention belongs to the technical field of wear test research, and in particular relates to a fretting friction and wear test device. Background technique [0002] Fretting friction and wear generally occur in aerospace, machinery industry, railway transportation, nuclear industry, bioengineering, electric power industry and other fields. Because the displacement amplitude range is generally within 300 μm, it is difficult to detect and improve the fretting damage in time, resulting in irreparable consequences. Therefore, it is necessary to study the fretting friction and wear behavior. There are currently three main contact forms of fretting friction and wear: point / surface, line / surface, and surface / surface contact. The point / surface contact form is easier to realize, and ball / disk friction is mostly used, so the related research is richer. In practical engineering applications, the fretting behavior in the form of line / surface or surface / surfa...
Claims
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IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/02G01N3/56
Inventor 张新华盖鹏涛郑晓兵王明涛
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST