CN211373982U - A tooling component and a vibration test fixture for improving the versatility of a vibration test fixture - Google Patents

Abstract

In order to make the test fixture meet the versatility requirements, the utility model provides a tooling component and a vibration test fixture that improves the versatility of the vibration test fixture. The tooling assembly includes three tooling units; the first tooling unit includes a plurality of first tooling units, the second tooling unit includes a plurality of second tooling units, and the third tooling unit includes a plurality of third tooling units; the first to third tooling units have the same structure. The sizes are different; a single tooling has a countersunk through hole, and the external shape matches the internal shape of the largest countersunk hole of the vibration test fixture; the first tooling size: M8mm screw head diameter <d1<25.5mm, 8.0mm<d2<17.0mm, M8mm screw head height＜d2＜17.0mm; second tooling size: M10mm screw head diameter＜d1＜25.5mm, 10.0mm＜d2＜17.0mm, M10mm screw head height＜d2＜17.0mm; third tooling size: M12mm screw Head diameter＜d1＜25.5mm, 12.0mm＜d2＜17.0mm, M12mm screw head height＜d2＜17.0mm; d1 is the inner diameter of the large hole of the countersunk hole, d2 is the inner diameter of the small hole, and d3 is the height of the large hole.

Description

A tooling assembly and a vibration test fixture for improving the versatility of a vibration test fixture

technical field

The utility model belongs to the technical field of vibration testing, and relates to a tooling component for improving the versatility of a vibration testing fixture, and a vibration testing fixture using the tooling component.

Background technique

Vibration test has become an important means of reliability verification of aerospace, aviation, ship and ground military and civil equipment. Whether it can work normally and meet the requirements of use under vibration conditions.

At present, the vibration test is mainly carried out on an electromagnetic vibration table. The working principle is that a constant magnetic field interacts with a coil with a certain alternating current in the magnetic field, thereby generating a certain excitation force. When a device is subjected to a vibration test, it is generally necessary to rigidly connect the device under test to the vibration table through a test fixture. As a mechanical transition piece, the test fixture not only needs to provide a mechanical interface that matches the equipment, but also provides a mechanical interface that matches the table top of the shaking table. Rigid connection.

The mounting holes of the shaking table are threaded holes, and the threaded holes of different sizes of the shaking table have different diameters. The common specifications are Φ8mm, Φ10mm, Φ12mm, Φ16mm, etc. In order to ensure the rigidity of the connection between the test fixture and the shaking table, the test fixture mechanical The interface generally corresponds to the design of countersunk holes of Φ9mm, Φ11mm, Φ13.5mm, Φ17.5mm, that is, the test fixture should design countersunk holes with different diameters according to the vibration table of different threaded hole diameters.

At different stages of the equipment development process, multiple vibration tests are often required. As a relatively scarce resource, the shaking table cannot be coordinated to the same threaded hole diameter for each test. This requires the same equipment. Designing and processing two to three or even more test fixtures with different countersunk hole diameters requires more manpower and material resources, which greatly increases the cost of equipment development, especially for aerospace equipment with a very tight development cycle. A test fixture often affects the development progress. In view of this situation, designing a universal test fixture or making a test fixture with a universal function through a device has become an urgent problem to be solved by equipment developers and vibration test researchers.

Utility model content

In order to make the test fixture meet the requirements of versatility and reduce the cost of equipment development, the utility model provides a tooling assembly and a vibration test fixture for improving the versatility of the vibration test fixture, which can make only one test fixture without changing the existing test fixture. The test fixture with various countersunk hole diameters can be installed on the vibration table with different threaded hole diameters to meet the universal requirements.

The technical scheme of the present utility model is:

A tooling assembly for improving the versatility of a vibration test fixture, which is special in that it includes a first tooling unit, a second tooling unit and a third tooling unit;

The first tooling unit includes a plurality of mutually independent first toolings, the second tooling unit includes a plurality of mutually independent second toolings, and the third tooling unit includes a plurality of mutually independent third tooling;

The first tooling, the second tooling and the third tooling have the same structure and different sizes;

A single tool has a countersunk hole inside, and the external shape matches the internal shape of the largest size countersunk hole of the vibration test fixture;

Define the inner diameter of the large hole of the countersunk head on a single tool as d1, the inner diameter of the small hole as d2, and the height of the large hole as d3, then

The size of the countersunk head through hole on the first tooling is: M8mm screw head diameter < d1 < 25.5mm, 8.0mm < d2 < 17.0mm, M8mm screw head height < d2 < 17.0mm;

The size of the countersunk head through hole on the second tooling is: M10mm screw head diameter < d1 < 25.5mm, 10.0mm < d2 < 17.0mm, M10mm screw head height < d2 < 17.0mm;

The size of the countersunk head through hole on the third tooling is: M12mm screw head diameter < d1 < 25.5mm, 12.0mm < d2 < 17.0mm, M12mm screw head height < d2 < 17.0mm.

Preferably, the dimensions of the countersunk head through holes on the first tooling are: d1=15.0mm, d2=9.0mm, d3=9.0mm; the dimensions of the countersunk head through holes on the second tooling are: d1=18.0mm, d2=11.0 mm, d3=11.0mm; the size of the through hole of the countersunk head on the third tooling is: d1=20.0mm, d2=13.0mm, d3=13.5mm.

Preferably, the first tooling, the second tooling and the third tooling are made of aluminum or steel.

The utility model also provides a vibration test fixture with a plurality of countersunk holes; the special feature is that it further comprises the above-mentioned tooling assembly; the tooling assembly is used in cooperation with the plurality of countersunk holes.

The advantages of the utility model are:

1. The present utility model proposes a new idea of designing a universal fixture for vibration testing. Under the premise of not changing any size of the existing test fixture itself, the tooling assembly of the present utility model is used to cooperate with the test fixture, so that the countersunk head of the test fixture is used. The pore size is variable to achieve general purpose.

2. The tooling assembly of the present utility model is small in size, light in weight, simple in design and processing, low in price, reliable in structure, simple and quick in installation, and can be used repeatedly. Equipment development cycle, to ensure the progress of the task, the development of aerospace, aviation, ships and ground military and civilian equipment, especially the development of aerospace equipment has a strong practical value, and it is worth promoting to the whole country.

Description of drawings

FIG. 1 is a schematic structural diagram of a single tool in the tool assembly of the present invention.

Figure 2 is a schematic diagram of a Φ17.5mm countersunk hole on an existing common vibration test fixture.

Fig. 3 is a schematic diagram of the fitting of a single tool and a countersunk hole on a vibration test fixture in the tooling assembly of the present invention.

Description of reference numerals: 1- countersunk head through hole, 2- countersunk head hole, 3- second tooling, 4- vibration test fixture.

Detailed ways

The present utility model will be further described below in conjunction with the accompanying drawings.

Although the diameters of the threaded holes on the vibrating table surface are different, the hole spacing generally has only one specification (most of the threaded holes on the vibrating table surface are 100mm), which makes it unnecessary to consider the vibrating table when designing the tooling components of the utility model. The hole distance factor of the countertop threaded hole only needs to consider the problem of adapting to different threaded hole diameters.

The tooling assembly of the utility model comprises a first tooling unit, a second tooling unit and a third tooling unit;

The first tooling unit includes a plurality of mutually independent first toolings, the second tooling unit includes a plurality of mutually independent second toolings, and the third tooling unit includes a plurality of mutually independent third tooling;

The first tooling, the second tooling and the third tooling have the same structure and different sizes; the first tooling, the second tooling and the third tooling can be made of materials such as aluminum, steel or stainless steel, which can be freely selected according to different needs in practice.

The structure of a single tool is shown in Figure 1. Considering the versatility, its external shape and size match the internal shape of the largest size of the counterbore hole of the test fixture, that is, the counterbore 2 (as shown in Figure 2) of Φ17.5mm. , its inside is a countersunk head through hole 1; define the inner diameter of the large hole of the countersunk head through hole 1 on a single tooling as d1, the inner diameter of the small hole as d2, and the height of the large hole as d3, then the first tooling, the second tooling and the third tooling The corresponding countersunk through hole 1 dimensions are shown in the table below:

Table 1 Tooling component size table unit: mm

Corresponding screw specifications M8 M10 M12 Countersunk through hole size first tooling Second tooling third tooling d1 15.0 18.0 20.0 d2 9.0 11.0 13.0 d3 9.0 11.0 13.5

When the vibration test fixture is installed on the vibrating table surface of the Φ16mm threaded hole, M16mm screws can be used to directly fasten the two, and the tooling assembly of the present invention is not required;

When the vibration test fixture is installed on the vibration table with threaded holes of Φ8mm, Φ10mm, and Φ12mm, first install the tool of the corresponding size in the tooling assembly of the utility model in the countersunk hole of the vibration test fixture, and then use the corresponding specification of the screw to fasten it. solid, as shown in Figure 3.

Taking the threaded hole diameter of Φ10mm on the table top of the shaking table as an example, the implementation method of rigidly connecting the vibration test fixture with the hole diameter of the countersunk head with the hole diameter of Φ17.5mm and the table top of the shaking table by using the tooling assembly of the present utility model is briefly introduced:

1. Place the vibration test fixture 4 on the vibration table, and roughly align the countersunk holes on the vibration test fixture 4 with the threaded holes on the vibration table;

2. Select the second tooling 3 with d1=18.0mm, d2=11.0mm, d3=11.0mm, and put the second tooling 3 into each countersunk hole of the vibration test fixture 4 in turn;

3. Place the M10mm socket head cap screws (not shown in the figure) into the second tooling 3 in sequence;

4. Adjust the position of the vibration test fixture 4 so that the M10mm socket head cap screws are aligned with the threaded holes on the vibration table;

5. Use an Allen wrench to tighten each M10mm Allen screw to an appropriate torque to complete the rigid connection between the vibration test fixture and the vibration table.

Claims (4)

1. a tooling assembly improving the versatility of a vibration test fixture, is characterized in that: comprise the first tooling unit, the second tooling unit and the third tooling unit; The first tooling unit includes a plurality of mutually independent first toolings, the second tooling unit includes a plurality of mutually independent second toolings, and the third tooling unit includes a plurality of mutually independent third tooling; The first tooling, the second tooling and the third tooling have the same structure and different sizes; A single tool has a countersunk hole inside, and the external shape matches the internal shape of the largest size countersunk hole of the vibration test fixture; Define the inner diameter of the large hole of the countersunk head on a single tool as d1, the inner diameter of the small hole as d2, and the height of the large hole as d3, then The size of the countersunk head through hole on the first tooling is: M8mm screw head diameter < d1 < 25.5mm, 8.0mm < d2 < 17.0mm, M8mm screw head height < d2 < 17.0mm; The size of the countersunk head through hole on the second tooling is: M10mm screw head diameter < d1 < 25.5mm, 10.0mm < d2 < 17.0mm, M10mm screw head height < d2 < 17.0mm; The size of the countersunk head through hole on the third tooling is: M12mm screw head diameter < d1 < 25.5mm, 12.0mm < d2 < 17.0mm, M12mm screw head height < d2 < 17.0mm. 2. The tooling assembly for improving the versatility of a vibration test fixture according to claim 1, wherein the size of the through hole of the countersunk head on the first tooling is: d1=15.0mm, d2=9.0mm, d3=9.0mm; The dimensions of the countersunk head through holes on the second tooling are: d1=18.0mm, d2=11.0mm, d3=11.0mm; The dimensions of the countersunk head through holes on the third tooling are: d1=20.0mm, d2=13.0mm, and d3=13.5mm. 3. The tooling assembly for improving the versatility of a vibration test fixture according to claim 1 or 2, wherein the first tooling, the second tooling and the third tooling are made of aluminum or steel. 4 . A vibration test fixture with a plurality of countersunk holes; characterized in that: further comprising the tooling assembly according to claim 1 , 2 or 3 ; the tooling assembly is used in cooperation with the plurality of countersunk holes. 5 .

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