RU2016399C1 - Device for friction testing of materials - Google Patents

Abstract

FIELD: test technology. SUBSTANCE: device has grippers 2, 3 with draw rods 8, 9 for check specimens 4, grip 5 with draw rod 10 for specimen 6, retainers 11, 12, 13, clutch 13, fingers 21, 22, 23, shaft 15, lever 16 with weight 17. The device is characterized in that relative displacement of specimens occurs at oscillations of lever 16 which are transformed into relative displacements by shaft 15 and different combinations of activation of the clutch, retainers and fingers. EFFECT: widened operating capabilities due to providing tests not only at relative axial movement of specimens and check specimens but at swinging and simultaneous swinging and reciprocal movement as well. 1 dwg

Description

 The invention relates to test equipment, to friction tests.

 A device for testing materials for friction [1], as well as a device for testing materials for friction [2]. The devices comprise a base, two grippers of respective counter-samples installed on it, a sample of material placed between them, a clamping device associated with counter-grippers, three rods associated with corresponding grippers, tie rods relative to the base, a wheel with a shaft kinematically connected with rods, and lever with a load associated with the wheel.

 The disadvantage of the installations is that they are not feasible tests during reciprocating and joint reciprocating and reciprocating movements of the sample relative to counter samples.

 The aim of the invention is to expand the functionality by providing tests not only with the mutual axial displacement of the samples and the counter-sample, but also with the reciprocating and together reciprocating and reciprocating movement of the sample relative to the counter-samples.

 The goal is achieved by the fact that the wheel shaft is connected to the sample capture rod by means of a coupling, has a section with a screw thread and an annular groove and is connected to the wheel with the possibility of rotation and axial movement, and the device is equipped with three fingers with devices for moving them relative to the shaft in the radial direction , one of which is installed on the base with the possibility of interaction with the annular groove, and the other two are mounted on the corresponding rods of the counterblock grips with the possibility of interaction with the screw thread Oh.

 The drawing shows the installation diagram.

 A device for testing friction materials contains a base 1, two grippers 2, 3 of the corresponding counter samples 4 mounted on it, a gripper 5 between the sample 6 of material 6 placed between them, a clamping device 7 associated with the grippers of the counter samples, three rods 8, 9, 10 associated with the corresponding grippers, the clamps 11, 12, 13 of the rods relative to the base, the wheel 14 with the shaft 15, kinematically connected with the rods, and the lever 16 with the load 17, connected with the wheel.

 The shaft 15 of the wheel is connected to the thrust 10 of the capture of the sample using the coupling 18, has a section 19 with a screw thread and an annular groove 20 and is connected to the wheel 14 with the possibility of rotation and axial movement. The device is equipped with three fingers 21, 22, 23 with devices for their movement relative to the shaft in the radial direction, one of which 21 is mounted on the base with the possibility of interaction with the annular groove, and the other two 22, 23 are mounted on the respective tie rods of the counter-samples with the possibility of interaction with screw thread 19.

 Devices for moving fingers made electromagnetic. The possibility of rotation and axial movement of the shaft 15 is provided by the sliding key 24. Sample 6 is made annular.

 The device operates as follows.

 For tests during the reverse-rotational movements of the sample 6 relative to counter-samples 4, the samples are compressed using screw devices 7, the clutch 18 is turned on, the clamps 11, 12 are turned on, the clamp 13 is turned off, finger 21 is inserted into groove 20, fingers 22, 23 are removed from the screw groove 19 and move the lever 16 from the equilibrium position. When the lever 16 vibrates under the action of the load 17, the wheel 14 rotates the shaft 15 and rotates the grip 5 with the sample 6 relative to the counter samples 4 through the coupling 18. For testing with mutual axial movement of the samples, turn off the coupling 18, turn on the lock 13, turn off one or both locks 11, 12 , depending on whether one or both counter samples should be shifted according to the test task. Insert two or one fingers 22, 23 into the helical groove 19, insert the finger 21 into the groove 20, and move the arm 16. The reciprocating movement of the shaft 15 is converted by the helical groove 19 and the fingers 22, 23 into the reciprocating movements of one or both counter samples relative to the stationary sample 6. For tests with reciprocating and reciprocating movements of the sample relative to counter samples, turn on the clutch 18, turn off the lock 13, turn on the locks 11, 12, insert the fingers 22, 23 into the screw groove 19, remove the finger 21 from the annular groove 20 and the lever 16 is brought out of the equilibrium position. The reciprocating rotational movements of the shaft 15 are converted by a helical groove 19 and the fingers 22, 23 into the reciprocating rotational and reciprocating movements and are transmitted to the sample 6 through the clutch 18 and the gripper 5. Changes to the test conditions are carried out during the experiment, as the stored energy is realized on pendulum 16, in accordance with the test program.

Claims (1)

 DEVICE FOR TESTING MATERIALS FOR FRICTION, containing a base, two grippers of the corresponding counter samples installed on it, a sample of material placed between them, a clamping device associated with the grippers of the counter samples, three rods connected with the corresponding grippers, tie rods relative to the base, a wheel with a shaft, kinematically connected with rods, and a lever with a load connected with a wheel, characterized in that, in order to expand functionality by providing tests not only with mutual axial displacement of the samples and the counter-sample, but also with the reciprocal-rotational and together reciprocal-rotational and reciprocal movement of the sample relative to the counter-samples, the wheel shaft is connected to the sample traction by means of a coupling, has a section with a screw thread and an annular groove and is connected to the wheel with the possibility of rotation and axial movement, and the device is equipped with three fingers with devices for their movement relative to the shaft in the radial direction, one of which is mounted on the base with the possibility of Strongly interacting with the annular groove and the other two are mounted on respective rods kontrobraztsov grippers to engage with a screw thread.