CN213657718U

CN213657718U - Wall thickness measuring device of thin-wall part

Info

Publication number: CN213657718U
Application number: CN202022794553.2U
Authority: CN
Inventors: 田京津; 唐怀瑜; 但盼亮; 刘军科; 韩超
Original assignee: Xi'an Chengli Aviation Manufacturing Co ltd
Current assignee: Xi'an Chengli Aviation Manufacturing Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-07-09
Anticipated expiration: 2030-11-27

Abstract

The utility model belongs to the technical field of aero-engines, and relates to a wall thickness measuring device for thin-wall parts, which comprises a measuring tool for measuring length, a first wall thickness measuring rod, a second wall thickness measuring rod and a third wall thickness measuring rod; the first wall thickness measuring rod is riveted with the second wall thickness measuring rod, the first wall thickness measuring rod is horizontally and fixedly connected with the third wall thickness measuring rod, and the gap between the second wall thickness measuring rod and the third wall thickness measuring rod is less than 0.01 mm; the second wall thickness measuring rod is provided with a first contact point, and the third wall thickness measuring rod is provided with a second contact point. The measuring device adopts a measuring tool consisting of a first wall thickness measuring rod, a second wall thickness measuring rod and a third wall thickness measuring rod, the distance from a first contact point to a second contact point is the wall thickness, and the wall thickness is indirectly obtained by measuring the distance between corresponding points by utilizing the lever principle and the principle of similar triangles.

Description

Wall thickness measuring device of thin-wall part

Technical Field

The utility model belongs to the technical field of the aeroengine, a thin wall spare is with measuring frock is related to, concretely relates to wall thickness measurement device of thin wall part.

Background

The aircraft engine is known as the heart of an aircraft, and the combustion chamber is the aorta of the engine, and forms three core components of the aerospace propulsion system together with the gas compressor and the turbine. The combustion chamber mainly comprises basic components such as an air inlet device, a flame tube, a shell, a nozzle, an igniter and the like. The wall thickness measurement of thin-wall components such as flame tube, annular thin-wall distribution hole, outer cover and sleeve becomes a difficult problem.

Many measuring tools on the market cannot accurately measure the wall thickness of a thin-wall part. Common vernier calipers and outside micrometers cannot directly or indirectly measure; the existing wall thickness measuring instrument can measure common metal materials by adopting a magnetic flaw detection method, but cannot be suitable for measuring special materials and plastic parts.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a wall thickness measuring device of thin wall part, adopt the measuring device that the reliable standard component of quality makes up as survey utensil and the very high wall thickness measuring stick of depth of parallelism in the market, can improve the installation accuracy on the one hand, prevent deformation and aversion that appear among the size measurement process, on the other hand has sufficient bearing capacity, guarantees the measuring accuracy.

The utility model aims at solving through the following technical scheme:

the wall thickness measuring device for the thin-wall part comprises a measuring tool for measuring length, a first wall thickness measuring rod, a second wall thickness measuring rod and a third wall thickness measuring rod; the first wall thickness measuring rod is riveted with the second wall thickness measuring rod, the first wall thickness measuring rod is horizontally and fixedly connected with the third wall thickness measuring rod, and the gap between the second wall thickness measuring rod and the third wall thickness measuring rod is smaller than 0.01 mm; the second wall thickness measuring rod is provided with a first contact point, the third wall thickness measuring rod is provided with a second contact point, and the distance between the first contact point and the second contact point is defined as the wall thickness.

Further, the second wall thickness measuring rod comprises an upper rod located above the first wall thickness measuring rod and a lower rod located below the first wall thickness measuring rod, and the upper rod and the lower rod are integrally formed.

Furthermore, the included angle between the lower rod and the first wall thickness measuring rod is alpha, and alpha is more than 0 and less than or equal to 90 degrees.

Further, the first contact point is located at an end of the upper rod.

Further, the shape of the upper rod is determined according to the structural condition of the thin-wall part.

Furthermore, the upper rod is of a C-shaped structure.

Furthermore, the upper rod is formed by integrally forming a plurality of sections of measuring arms, and an included angle between every two adjacent measuring arms is an obtuse angle.

Furthermore, the first wall thickness measuring rod and the third wall thickness measuring rod are fixedly connected through bolts and nuts.

Compared with the prior art, the utility model provides a technical scheme includes following beneficial effect: the measuring tool is composed of a first wall thickness measuring rod, a second wall thickness measuring rod and a third wall thickness measuring rod, the distance from a first contact point to a second contact point is the wall thickness size, and the wall thickness size is indirectly obtained by measuring the distance between corresponding points by using the principle of a similar triangle; the measuring device can avoid the problems of positioning, precision and angle caused by repeated clamping for the clamp; for the measurement process, the mounting structure can prevent deformation and displacement in the dimension measurement process, and has enough bearing capacity to ensure the measurement accuracy.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a wall thickness measuring device for a thin-walled part according to the present invention;

fig. 2 is a measurement schematic diagram of the wall thickness measuring device for thin-walled parts provided by the utility model.

Wherein: 1. a first wall thickness measuring rod; 2. a second wall thickness measuring rod; 3. a third wall thickness measuring rod; 4. a first contact point; 5. a second contact point; 6. a rod is arranged; 7. a lower rod; 8. and a measuring arm.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the following claims.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and the embodiments.

Examples

Referring to fig. 1, the utility model provides a wall thickness measuring device for thin-wall parts, which comprises a measuring tool for measuring length, a first wall thickness measuring rod 1, a second wall thickness measuring rod 2 and a third wall thickness measuring rod 3; the first wall thickness measuring rod 1 is riveted with the second wall thickness measuring rod 2, the first wall thickness measuring rod 1 is horizontally and fixedly connected with the third wall thickness measuring rod 3, and the gap between the second wall thickness measuring rod 2 and the third wall thickness measuring rod 3 is less than 0.01 mm; the second wall thickness measuring rod 2 is provided with a first contact point 4, the third wall thickness measuring rod 3 is provided with a second contact point 5, and the distance between the first contact point 4 and the second contact point 5 (see fig. 2 as a vertical distance AB) is the wall thickness of the thin-walled part.

Further, the second wall thickness measuring rod 2 includes an upper rod 6 located above the first wall thickness measuring rod 1 and a lower rod 7 located below the first wall thickness measuring rod 1, and the upper rod 6 and the lower rod 7 are integrally formed.

Furthermore, the included angle between the lower rod 7 and the first wall thickness measuring rod 1 is alpha, and alpha is more than 0 and less than or equal to 90 degrees.

Further, the first contact point 4 is located at the end of the upper rod 6.

Further, the shape of the upper rod 6 is determined according to the structural condition of the thin-walled part.

As an alternative or preferred embodiment of the present embodiment, the upper rod 6 has a "C" shaped structure.

As an alternative or preferred embodiment of the present embodiment, the upper rod 6 is integrally formed by multiple measuring arms 8, and the included angle between adjacent measuring arms 8 is an obtuse angle.

Further, the first wall thickness measuring rod 1 and the third wall thickness measuring rod 3 are fixedly connected through bolts and nuts.

The wall thickness measuring device is specifically installed and used as follows:

firstly, selecting a standard component with reliable quality on the market as a measuring tool (such as a graduated scale), and matching with wall thickness measuring rods (a first wall thickness measuring rod 1, a second wall thickness measuring rod 2 and a third wall thickness measuring rod 3) with better parallelism to form a wall thickness measuring device;

secondly, a gap of 0.01 clearance gauge between the second wall thickness measuring rod 2 and the third wall thickness measuring rod 3 does not pass through, and the assembly connection is carried out by combining with the figure 1;

then, the first wall thickness measuring rod 1 is connected with the second wall thickness measuring rod 2 through a rivet, and 90-degree rotation can be achieved;

finally, referring to fig. 2, Δ AOB is similar to Δ a 'OB', and the distance AB between the first contact point 4 and the second contact point 5 can be obtained by measuring the distance a 'B', so as to obtain the wall thickness dimension of the thin-walled part, and the specific calculation method is as follows:

the distance AO of the second contact point 5 from the rivet point is 150mm, a 'O is 50mm, AO/a' O is AB/a 'B' is 3, and AB is 3A 'B' according to the triangle-like principle.

Therefore, the wall thickness measuring device has the advantages of simple measuring process, convenient operation and multiple use; meanwhile, a standard part with reliable quality in the market is selected as a measuring tool, so that the reliability and stability of a measuring result can be improved.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.

It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A wall thickness measuring device for thin-wall parts is characterized by comprising a measuring tool for measuring length, a first wall thickness measuring rod (1), a second wall thickness measuring rod (2) and a third wall thickness measuring rod (3); the first wall thickness measuring rod (1) is riveted with the second wall thickness measuring rod (2), the first wall thickness measuring rod (1) is horizontally and fixedly connected with the third wall thickness measuring rod (3), and a gap between the second wall thickness measuring rod (2) and the third wall thickness measuring rod (3) is smaller than 0.01 mm; the second wall thickness measuring rod (2) is provided with a first contact point (4), the third wall thickness measuring rod (3) is provided with a second contact point (5), and the distance between the first contact point (4) and the second contact point (5) is defined as the wall thickness.

2. Wall thickness measuring device according to claim 1, wherein the second wall thickness measuring rod (2) comprises an upper rod (6) above the first wall thickness measuring rod (1) and a lower rod (7) below the first wall thickness measuring rod (1), the upper rod (6) being integrally formed with the lower rod (7).

3. Wall thickness measuring device according to claim 2, wherein the lower bar (7) is at an angle α to the first wall thickness measuring bar (1), and 0 < α ≦ 90 degrees.

4. Wall thickness measuring device according to claim 2, characterized in that the first contact point (4) is located at the end of the upper rod (6).

5. Wall thickness measuring device according to claim 2, characterized in that the shape of the upper rod (6) is determined according to the structural conditions of the thin-walled part.

6. Wall thickness measuring device according to claim 5, characterized in that the upper bar (6) is of "C" configuration.

7. Wall thickness measuring device according to claim 5, wherein the upper rod (6) is integrally formed from a plurality of measuring arms (8), the angle between adjacent measuring arms (8) being obtuse.

8. Wall thickness measuring device according to claim 1, wherein the first wall thickness measuring rod (1) and the third wall thickness measuring rod (3) are fixedly connected by means of bolts and nuts.