CN213658206U

CN213658206U - Five quiet rigidity testing arrangement

Info

Publication number: CN213658206U
Application number: CN202022564470.4U
Authority: CN
Inventors: 胡长华
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-07-09
Anticipated expiration: 2030-11-09

Abstract

A five-axis static stiffness testing device is characterized in that five-axis loading is generated through computer motion control, bending, torsion, shearing and tension-compression deformation are carried out on a tested structure, deformation values of various testing points are obtained through a displacement sensor, and loads are measured through a force sensor. The device is simple, convenient and automatic to operate and suitable for high-precision static stiffness tests of various structures.

Description

Five quiet rigidity testing arrangement

The technical field is as follows:

the utility model relates to a quiet rigidity test device, specifically speaking are five quiet rigidity testing arrangement.

Background art:

many practical engineering structures need to be subjected to static rigidity tests, such as structural members on space satellites, numerical control machine tool spindles, ball screw guide rail pairs and the like. The common static stiffness test adopts a testing machine or a hydraulic jack for loading, the testing machine generally adopts one-way loading, bending, shearing, twisting and pulling-pressing in one or two directions are carried out at one time, the hydraulic jack can be simultaneously loaded by a plurality of hydraulic jacks, but the control precision and the operation performance are poor, and the testing machine or the hydraulic jack can not be used for realizing the pure shearing loading particularly.

The invention content is as follows:

an object of the utility model is to provide a five quiet rigidity testing arrangement to prior art not enough. The device adopts computer control to carry out multiaxis loading measurement, and measurement accuracy is high, and degree of automation is high, and is easy and simple to handle.

The technical scheme of the utility model:

the computer controls the motion control card to carry out five-axis loading, the structure is bent, sheared, twisted and stretched and pressed to deform through five loading arms, the stress and deformation of each measuring point are measured through the force and displacement sensors, and the computer automatically processes the static rigidity test result.

The utility model has the advantages that: compared with the prior art, the utility model relates to an automatic testing arrangement based on computer control motion control card carries out multiaxis loading, and measurement accuracy is high, and degree of automation is high, and is easy and simple to handle.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

The labels in the figure are: the device comprises a tension and compression loading arm 1, a shear loading arm in the 2Y direction, a shear loading arm in the 3Z direction, a bending loading arm 4, a torsion loading arm 5, a tested structural member 6, a loading table top 7, a motion control card 8, a computer 9, a displacement sensor 10 and a force sensor 11.

The specific implementation mode is as follows:

as shown in FIG. 1, a five-axis static stiffness testing device. The device comprises a tension and compression loading arm 1, a 2Y-direction shearing loading arm, a 3Z-direction shearing loading arm, a 4 bending loading arm, a 5 torsion loading arm, a 6 tested structural member, a 7 loading table top, an 8 motion control card, a 9 computer, a 10 displacement sensor and an 11 force sensor.

The tested structural part 6 is fixed on the loading table top 7; the upper end of the X-direction tension and compression loading arm 1 is fixed on the frame of the table top 7, and the lower end of the X-direction tension and compression loading arm acts on the upper end of the structural part 6 to be measured; the Y-direction shearing loading arm 2 acts on the measured structural part 6 in the horizontal direction; the Z-direction shearing loading arm 3 acts on the measured structural part 6 in the horizontal direction; the bending loading arm 4 acts on the tested structural part 6 in the horizontal direction; the torsion loading arm 5 acts on the structural part 6 to be tested in the vertical direction; the computer 9 controls the tension and compression loading arm 1, the Y-direction shearing loading arm 2, the Z-direction shearing loading arm 3, the bending loading arm 4 and the torsion loading arm 5 through the motion control card 8; the force sensor 11 and the displacement sensor 10 are connected to the computer 9; and the computer 9 processes the rigidity test result of the tested structural part 6.

The five-axis static stiffness testing device has the working principle that: the motion control card drives the bending, shearing, twisting, tension and compression loading arms at different action points under the control of the computer, the bending, shearing, twisting and tension and compression sub-item static stiffness tests can be independently carried out according to measurement requirements, the bending, shearing, twisting and tension and compression static tests can also be simultaneously carried out, and test results of the force sensor and the displacement sensor are automatically stored in the computer.

Further, the utility model discloses realize pure shear loading by crooked loading arm 4 and Z to shearing loading arm 3, this is satisfied completely to the structure that has accurate rigidity test requirement.

Claims

1. A five-axis static stiffness testing device is characterized in that: the tested structural part (6) is fixed on the loading table top (7); the upper end of the X-direction tension and compression loading arm (1) is fixed on the frame of the table top (7), and the lower end of the X-direction tension and compression loading arm acts on the upper end of the structural part (6) to be measured; the Y-direction shearing loading arm (2) acts on the measured structural part (6) in the horizontal direction; the Z-direction shearing loading arm (3) acts on the measured structural part (6) in the horizontal direction; the bending loading arm (4) acts on the measured structural part (6) in the horizontal direction; the torsion loading arm (5) acts on the structural part (6) to be tested in the vertical direction; the computer (9) controls the tension and compression loading arm (1), the Y-direction shearing loading arm (2), the Z-direction shearing loading arm (3), the bending loading arm (4) and the torsion loading arm (5) through a motion control card (8); the force sensor (11) and the displacement sensor (10) are connected to the computer (9); and (4) processing by the computer (9) to obtain a rigidity test result of the tested structural part (6).

2. The five-axis static stiffness testing device according to claim 1, characterized in that: pure shear loading is realized by the bending loading arm (4) and the Z-direction shear loading arm (3).