Slender combined test tool

Abstract

According to the slender combined test tool provided by the invention, two excitation points are connected by adopting a box shape, and product environment assessment under the condition of double increase of product quality and test magnitude can be met. The test tool comprises a tool 1, a tool 2 and connecting pieces 3-7, the connecting pieces 3-6 form a rectangular box body, and the connecting pieces 7 are used for enhancing the connecting rigidity between the tool 2 and the tool 4 and between the tool 2 and the tool 3. And the connecting pieces 3 and 4 adopt a #-shaped grid form and are used for improving the resonant frequency of the single board.

Description

Technical Field

[0001] The invention belongs to the field of dynamic environmental testing, and in particular relates to a slender combined testing tool. Background Art

[0002] The inspection of the durability of the product to road excitation during use is an important part of environmental testing. According to the different functions and locations of the product, the inspection methods of vibration testing are different, which are manifested in the following forms: impact, random vibration, sinusoidal excitation and mixed mode. The vibration fixture is an intermediate device connecting the tested product and the vibration test equipment, which is related to whether the test can be carried out smoothly; the design of the vibration fixture affects the test results and the implementation of the test. The requirements for the vibration fixture are as follows:

[0003] 1) Mechanical: meet the installation requirements of the tested product and simulate the actual installation status of the tested product; meet the installation requirements of the vibration test equipment and pay attention to the coincidence of the center of gravity; at the same time, consider the versatility, processing technology and convenience, cycle, economy, etc.

[0004] 2) Quality: As light as possible while meeting the test conditions and vibration test equipment capacity requirements.

[0005] Usually when testing larger or slender test pieces, integral casting is used to ensure frequency requirements. However, this sometimes results in a larger mass, which places high demands on the capabilities of the test equipment, and even requires adjustments to environmental conditions to roughly meet the experimental requirements. Summary of the invention

[0006] The purpose of the present invention is to provide a slender combined test fixture to solve the problem that the product quality and vibration environment conditions in the prior art are double increased and the existing test plan exceeds the original equipment capacity. The present invention adopts a combined fixture and connects two excitation points in a box shape.

[0007] The present invention provides a slender combined test tool, which adopts a combined fixture to design a test tool for a slender product, including: a tool 1, a tool 2, a connector 3, a connector 4, a connector 5, a connector 6, and a connector 7, wherein the tool 1 and the tool 2 are connected to the product and an excitation device, and the various parts are connected by threads; the connectors 3 and 4 are respectively connected to the connectors 5 and 6 by double-row screws to form a rectangular box body; the connector 7 strengthens the connection stiffness between the tool 2 and the connector 4, and between the tool 2 and the connector 3.

[0008] The beneficial effects of the present invention are as follows: the present invention adopts a combined fixture, and connects two exciting points in a box shape, so as to meet the product environment assessment under the conditions of double increase in product quality and test level. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention:

[0010] Figure 1 This is an assembly diagram of a combined tooling according to an embodiment of the present invention;

[0011] Figure 2 Schematic diagram of the combined tooling connector 5 and connector 6 according to an embodiment of the present invention;

[0012] Figure 3 Schematic diagram of the combined tooling connector 3 and connector 4 according to an embodiment of the present invention;

[0013] Figure 4 This is a schematic diagram of an integrated tooling according to an embodiment of the present invention;

[0014] Figure 5 It is the first-order torsional mode of the combined clamp of the embodiment of the present invention;

[0015] Figure 6 It is a second-order bending of the combined clamp of the embodiment of the present invention;

[0016] Figure 7 It is the third-order local mode of the upper and lower plates of the combined clamp of the embodiment of the present invention;

[0017] Figure 8 It is the fourth-order mode of the modular clamp according to the embodiment of the present invention;

[0018] Fig. 9 It is the fifth-order local mode of the upper and lower plates of the combined clamp of the embodiment of the present invention;

[0019] Fig.10 It is the sixth-order local mode of the upper and lower plates of the combined clamp of the embodiment of the present invention;

[0020] Fig.11 is the first-order torsional mode of the overall clamp of the embodiment of the present invention;

[0021] Fig.12 is the second-order bending mode of the overall clamp of the embodiment of the present invention;

[0022] Fig.13 is the third-order torsional mode of the overall clamp of the embodiment of the present invention;

[0023] Fig.14 It is the fourth-order bending-torsion combined mode of the overall clamp of the embodiment of the present invention;

[0024] Fig.15 is the fifth-order bending mode of the overall fixture of the embodiment of the present invention;

[0025] Fig.16It is the sixth-order torsional mode of the overall clamp of the embodiment of the present invention.

[0026] Among them: 1- tooling 1 2- tooling 2 3- connector 3 4- connector 4 5- connector 5 6- connector 6 7- connector 7 DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] The invention provides a slender combined test tool, which adopts a combined fixture to design a test tool for a slender product, comprising: a tool 1, a tool 2, a connector 3, a connector 4, a connector 5, a connector 6, and a connector 7, wherein the tool 1 and the tool 2 are connected with a product and an excitation device, and are cast and processed by ZL114A material; the connectors 3, 4, 5, and 6 are machined by 2AL12 aluminum alloy material; the connector 7 is processed and formed by 140×80×6 standard steel; various parts are connected by threads; the connectors 3 and 4 are respectively connected to the connectors 5 and 6 by double-row screws, the two rows of screws are spaced 1mm apart, and the screws in each row are arranged at a spacing of 100mm to form a rectangular box body; the connector 7 is used to strengthen the connection stiffness between the tool 2 and the connector 4, and between the tool 2 and the connector 3.

[0029] The connection between connectors 3 and 4 and tooling 1 is connected by multiple sets of bolts, and connectors 3 and 4 are connected to connectors 5 and 6 respectively by double-row screws, so that the connection between each component is a fixed connection. Tooling 2 is screwed to connectors 3 and 4 by single-row screws, and the connection is strengthened by connector 7. Connectors 3 and 4 are optimized to adopt a "well" grid form to increase the resonant frequency of the single board. The free mode calculation of the two forms of fixtures can be seen in Figures 5 to 16 .

[0030] Under the design state, the total mass of the combined fixture is 499.5kg; the existing integral fixture is 671.7kg. According to finite element calculation, the first-order resonant frequency of the combined fixture is 100.77Hz, and that of the integral fixture is 86.11Hz. Compared with the combined fixture, the modal frequency is 17% higher than that of the integral fixture under the condition of reducing the total mass. From the first two modes, it can be seen that both types of fixtures are integral torsion and bending forms. The first two frequencies of the combined fixture are very close, 100.77Hz and 102.04Hz respectively; while the natural frequencies of the integral fixture are far apart, 86.11Hz and 153.51Hz respectively. When the same spectrum type of double-unit parallel random vibration test is carried out on products with similar connection structures, the output power of the vibration table required for the combined fixture to install a larger mass product for a 13grms test is about 1 / 2 of the 10grms test of the integral fixture. This shows the advantages of the combined fixture.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slender combined test tool, characterized in that: It includes tooling 1, tooling 2, connector 3, connector 4, connector 5, connector 6 and connector 7, wherein tooling 1 and tooling 2 are connected with the product and the vibration excitation device, and connectors 3-6 form a rectangular box body.

2. A slender combined test tool according to claim 1, characterized in that: The connectors 3 and 4 are connected to the tooling 1 by using multiple sets of bolts, and the connectors 3 and 4 are connected to the connectors 5 and 6 by using double-row screws.

3. The slender combined test tool according to claim 1, characterized in that: The connecting member 7 can strengthen the connection rigidity between the tooling 2 and the connecting member 4 , and between the tooling 2 and the connecting member 3 .

4. The slender combined test tool according to claim 1, characterized in that: The tooling 1 and tooling 2 are cast and processed by using ZL114A material.

5. The slender combined test tool according to claim 1, characterized in that: The connecting parts 3, 4, 5, 6 are machined from 2AL12 aluminum alloy material.

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