Testing device for mechanical property indexes of high-locking nut of torsion testing machine

Abstract

The utility model relates to the technical field of inspection and detection, and provides a device for testing mechanical property indexes of a high-lock nut of a torsion testing machine, which comprises a test bolt for mounting the high-lock nut and an inner and outer hexagonal cup sleeve which is sleeved on the head of the test bolt and is used for measuring the loosening torque of the high-lock nut, the side, located on the inner-outer hexagonal cup sleeve, of the rod portion of the test bolt is sleeved with an axial force sensor, the axial force sensor is attached to the supporting face of the inner-outer hexagonal cup sleeve, the side, located on the axial force sensor, of the rod portion of the test bolt is sleeved with a force unloading structure cushion block, the force unloading structure cushion block is attached to the axial force sensor, and the force unloading structure cushion block is sleeved with a force unloading handle. According to the testing device for the mechanical property indexes of the high-locking nut of the torsion testing machine, through cooperative use of the testing device and the torsion testing machine, four parameters can be detected by one set of device and the testing machine, excessive equipment is not needed, the testing efficiency is improved, and the testing device is simple in structure and convenient to use. The detection efficiency can be greatly improved; and the test cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of inspection and detection, especially relates to a test device for the mechanical property index of high lock nut of torsion testing machine. BACKGROUND

[0002] High lock nut is a kind of fastener commonly used on the aircraft, which is composed of a process part, a working part and a neck slot connecting the process part and the working part. High lock nut has a delicate structure design, and each part has its own function. The process part realizes wrenching and breaking, and the working part realizes final assembly and anti-loosening.

[0003] The mechanical property index of high lock nut mainly includes locking torque, breaking torque, pre-tightening force and loosening torque. In the actual test process, locking torque, breaking torque and loosening torque can be tested on the torsion testing machine without axial force sensor, while pre-tightening force needs to be measured on another device with axial force sensor. However, the device equipped with axial force sensor may not be equipped with three-jaw chuck, which cannot drive the working part of high lock nut, and thus the nut cannot be twisted out after unloading, so the four performance indexes of high lock nut cannot be measured at one time.

[0004] For example, the adjustment device for high lock nut pre-tightening force and loosening force test tool disclosed in Chinese Utility Model Patent Publication No. CN204988862U needs to be taken off from the torsion testing machine for additional adjustment, and then reassembled on the torsion testing machine for testing loosening torque after unloading. The operation steps are complicated and inefficient. UTILITY MODEL CONTENTS

[0005] In order to solve the problems in the background art, the utility model provides a test device for the mechanical property index of high lock nut of torsion testing machine.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a test device for the mechanical property index of high lock nut of torsion testing machine, comprising a test bolt for mounting high lock nut and an inner and outer hexagonal cup sleeve for measuring the loosening torque of high lock nut, the test bolt rod is located on one side of the inner and outer hexagonal cup sleeve and is sleeved with an axial force sensor, and the axial force sensor is attached to the support surface of the inner and outer hexagonal cup sleeve, the test bolt rod is located on one side of the axial force sensor and is sleeved with an unloading structure pad, and the unloading structure pad is attached to the axial force sensor, the unloading structure pad is sleeved with an unloading handle, and the test bolt rod is located on one side of the unloading handle and is sleeved with a test gasket.

[0007] Further, the inner and outer hexagonal cup sleeve, axial force sensor, unloading structure pad and test gasket are all provided with through holes for the test bolt to pass through.

[0008] Further, the force relieving structure pad block comprises a sleeving part for sleeving the test bolt rod part and a plate screwing part facilitating screwing of the force relieving handle.

[0009] Further, the torsion testing machine further comprises a first clamp and a second clamp.

[0010] Further, the first clamp is used for clamping the internal and external hexagonal cup sleeve, and the second clamp is used for clamping and screwing the high lock nut.

[0011] The utility model discloses the beneficial effects of:

[0012] The test device for the mechanical performance index of the high lock nut of the torsion testing machine can measure the locking torque of the high lock nut in the tightening process, can obtain the final breaking torque and axial pre-tightening force, and finally measures the loosening torque through the testing machine, so that four parameters can be detected by one device plus the testing machine, too many devices are not needed, and the detection efficiency can be greatly improved and the test cost can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further illustrated below in connection with the drawings and examples.

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the partial separation structure schematic diagram of the utility model;

[0016] Figure 3 It is the force relieving structure pad block structure schematic diagram of the utility model;

[0017] Figure 4 It is the high lock nut structure schematic diagram of the utility model.

[0018] In the drawing: 1, high lock nut;11, process part;12, work part;13, neck breaking groove;2, test bolt;3, internal and external hexagonal cup sleeve;4, axial force sensor;5, force relieving structure pad block;51, sleeving part;52, plate screwing part;6, force relieving handle;7, test gasket;8, torsion testing machine;81, first clamp;82, second clamp. DETAILED DESCRIPTION

[0019] In order to make the technical method, creative features, purposes and effects realized by the utility model easy to understand, the utility model will be further described below in connection with the specific implementation mode.

[0020] For example, Figure 1 , Figure 2 and Figure 4The utility model provides an experimental device for the mechanical property index of high lock nut of torsion testing machine, including the test bolt 2 for installing high lock nut 1 and the internal and external hexagonal cup sleeve 3 for measuring the loosening torque of high lock nut 1 for setting on the head of test bolt 2, the test bolt 2 rod part is located the internal and external hexagonal cup sleeve 3 one side and is equipped with the axial force sensor 4, and the axial force sensor 4 is attached with the internal and external hexagonal cup sleeve 3 support surface, the test bolt 2 rod part is located the axial force sensor 4 one side and is equipped with the unloading structure pad 5, and the unloading structure pad 5 is attached with the axial force sensor 4, the unloading structure pad 5 is equipped with the unloading handle 6, the test bolt 2 rod part is located the unloading handle 6 one side and is equipped with the test gasket 7.

[0021] Specifically, the internal and external hexagonal cup sleeve 3, axial force sensor 4, unloading structure pad 5, test gasket 7 are all provided with through holes for test bolt 2 to pass through.

[0022] Specifically, the unloading structure pad 5 includes a sleeve part 51 for sleeving the rod part of the test bolt 2 and a plate screwing part 52 for facilitating the screwing of the unloading handle 6.

[0023] Specifically, it further includes a torsion testing machine 8, which includes a first clamp 81 and a second clamp 82.

[0024] Specifically, the first clamp 81 is used to clamp the internal and external hexagonal cup sleeve 3, and the second clamp 82 is used to clamp and screw the high lock nut 1.

[0025] Working principle:

[0026] In use, first, fix the head of the test bolt 2 through the internal and external hexagonal cup sleeve 3, pass the axial force sensor 4 through the test bolt 2 and attach it with the support surface of the internal and external hexagonal cup sleeve 3, then sleeve the unloading structure pad 5 on the test bolt 2 and attach it with the axial force sensor 4, fix the unloading handle 6 on the wrenching part 52 of the unloading structure pad 5, and then assemble the test gasket 7.

[0027] Fix the internal and external hexagonal cup sleeve 3 through the first clamp 81 of the torsion testing machine 8, fix the high lock nut 1 through the second clamp 82, then start the torsion testing machine 8, drive the high lock nut 1 to the test bolt 2 through the second clamp 82, drive the process part 11 of the high lock nut 1 until the high lock nut 1 is attached with the test gasket 7 and no axial force is generated, continuously record the locking torque in this process, continue to screw in until the broken neck groove 13 is broken, and collect the breaking torque and pre-tightening force.

[0028] At this point, the process section 11 of the high-lock nut 1 is broken off, and the working section 12 of the high-lock nut 1 and its mating test bolt 2 are tightened in the installation position, thus completing the installation. Using the matching tool to drive the unloading handle 6, the thickness of the unloading structure pad 5 is reduced, creating a gap between the working section 12 of the high-lock nut 1 and the unloading structure pad 5, thereby releasing the axial preload.

[0029] The second clamp 82 on the torsion testing machine 8 drives the working part 12 of the high-lock nut 1, so that the high-lock nut 1 and the test bolt 2 are in a state of relative motion. The torque required to overcome the static friction force is measured, which is the loosening torque. This test device for the mechanical performance index of the high-lock nut 1 of the torsion testing machine can measure the locking torque of the high-lock nut 1 during the tightening process by using the test device and the torsion testing machine 8. It can also obtain the final breaking torque and axial preload. Finally, the loosening torque is measured by the torsion testing machine 8. One set of devices plus the torsion testing machine 8 can detect four parameters without the need for too much equipment, which can greatly improve the testing efficiency and reduce the testing cost.

Claims

1. A testing device for the mechanical performance indicators of high-lock nuts in a torsion testing machine, characterized in that: The test bolt (2) is used to install a high-lock nut (1) and an inner and outer hexagonal cup sleeve (3) is fitted on the head of the test bolt (2) to measure the loosening torque of the high-lock nut (1). An axial force sensor (4) is fitted on one side of the inner and outer hexagonal cup sleeve (3) and the axial force sensor (4) is in contact with the support surface of the inner and outer hexagonal cup sleeve (3). A force relief structure pad (5) is fitted on one side of the test bolt (2) and the force relief structure pad (5) is in contact with the axial force sensor (4). A force relief handle (6) is fitted on the force relief structure pad (5). A test shim (7) is fitted on one side of the test bolt (2) and the force relief handle (6).

2. The testing device for the mechanical performance indicators of high-lock nuts in a torsion testing machine according to claim 1, characterized in that: The inner and outer hexagonal cup sleeves (3), axial force sensor (4), unloading structure pad (5), and test pad (7) are all provided with through holes for the test bolts (2) to pass through.

3. The testing device for the mechanical performance indicators of high-lock nuts in a torsion testing machine according to claim 1, characterized in that: The unloading structure pad (5) includes a sleeve part (51) for sleeved on the rod of the test bolt (2) and a plate screwing part (52) for easy screwing of the unloading handle (6).

4. The testing device for the mechanical performance indicators of high-lock nuts in a torsion testing machine according to claim 3, characterized in that: It also includes a torsion testing machine (8), which includes a first clamp (81) and a second clamp (82).

5. The testing device for the mechanical performance indicators of high-lock nuts in a torsion testing machine according to claim 4, characterized in that: The first clamp (81) is used to clamp the inner and outer hexagonal cup sleeve (3), and the second clamp (82) is used to clamp and rotate the high-lock nut (1).

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