CN112630006A

CN112630006A - Flaring test tool

Info

Publication number: CN112630006A
Application number: CN202011601471.XA
Authority: CN
Inventors: 刘前峰; 屈明亮; 安蒙; 石大鹏; 付建建; 谢茂阳; 何坤; 李蓓蕾; 张瑜萍
Original assignee: Henan Aerospace Precision Machining Co Ltd
Current assignee: Henan Aerospace Precision Machining Co Ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-09

Abstract

The invention relates to a flaring test tool which comprises a support and a top core, wherein the support is provided with a supporting part for upwards positioning and supporting a sample, and a top core through hole is formed above the supporting part of the support; the top core is guided to penetrate through the top core through hole along the up-down direction, the top core comprises a flaring conical head at the lower end, the flaring conical head is used for jacking into a sample, the flaring conical head flares the sample when the top core moves downwards relative to the sample, and the upper end of the top core is positioned above the upper end surface of the support; the flaring test tool further comprises a limiting and stopping piece arranged on the top core, and the limiting and stopping piece is used for being in stop fit with the upper end face of the support along the vertical direction so as to limit the downward moving stroke of the top core relative to the sample. Before the test, the flaring amount of the sample can be ensured to be consistent with the preset flaring amount only by ensuring that the distance between the limiting stop piece and the upper end face of the support is a set value, the test is not limited by the level of an operator, and the test is more convenient to use.

Description

Flaring test tool

Technical Field

The invention relates to a flaring test tool.

Background

When the engine is received by the flaring nut, the diameter of the flaring end needs to be enlarged to 1.2 times of the original diameter, if cracks are generated, the flaring nut does not pass the flaring test, and otherwise, the flaring nut passes the flaring test. In the past, a flaring nut flaring test is mainly carried out by a conical punch and a press, the flaring nut is taken down after each punching, the measurement is carried out by a vernier caliper, if the flaring amount cannot be reached, the flaring nut is punched again until the flaring size is qualified, and the mode has low efficiency and is difficult to ensure. This problem is not only with flared nuts, but also with other specimens that are to be flared.

For this reason, the chinese utility model patent that the publication number is CN204613020U of granting discloses an omnipotent material test machine pipe flaring test apparatus, including support and reference column, the sample (the pipe in this patent) location is placed on the reference column, and test apparatus still includes flaring top core, and flaring top core lower extreme has the conical head, is used for carrying out the flaring to the sample, is equipped with the scale mark in the outside of flaring top core, during the use, accomplishes the flaring when the upper end of sample reaches the scale mark of setting for on the flaring top core.

The stroke that moves down of flaring top core can be observed through setting up the scale mark on the flaring top core among the prior art, moves down the flaring volume one-to-one of stroke and sample, but the problem that exists lies in: an operator needs to observe the relative position between the upper end of the sample and the scale mark by naked eyes, the flaring amount is related to the visual angle of the operator, and the condition that the actual flaring amount and the designed flaring amount have large deviation easily occurs, so that the result of the flaring test is inaccurate.

Disclosure of Invention

The invention aims to provide a flaring test tool, which aims to solve the technical problem that in the prior art, the actual flaring amount and the designed flaring amount have errors due to the fact that the position of a flaring top core is determined by means of naked eye observation.

In order to achieve the purpose, the technical scheme of the flaring test tool provided by the invention is as follows: the utility model provides a flaring test fixture, includes:

the support is provided with a supporting part for upwards positioning and supporting the sample, and a top core through hole is arranged above the supporting part;

the top core is guided to penetrate through the top core through hole in the up-down direction, the top core comprises a flaring conical head at the lower end, the flaring conical head is used for jacking a sample, the flaring conical head flares the sample when the top core moves downwards relative to the sample, and the upper end of the top core is positioned above the upper end surface of the support;

and the limiting and stopping piece is arranged on the ejector core and is used for being in blocking fit with the upper end surface of the support along the vertical direction so as to limit the downward moving stroke of the ejector core relative to the sample.

Has the advantages that: when the limiting stop piece stops the upper end face of the support, the top core moves downwards relative to the sample to be limited, and due to the fact that the taper of the conical head is fixed, the downward moving stroke of the top core and the flaring amount of the sample are in one-to-one correspondence, and the flaring amount of the sample can be effectively controlled. Before the test, the flaring amount of the sample can be ensured to be consistent with the preset flaring amount only by ensuring that the distance between the limiting stop piece and the upper end face of the support is a set value, the test is not limited by the level of an operator, and the test is more convenient to use. According to the flaring test device, the limiting and stopping piece is arranged by depending on the top core, the top core is in guiding fit with the support, and the limiting and stopping piece is not easy to horizontally swing relative to the support, so that the distance between the limiting and stopping piece and the upper end surface of the support is not changed, and the accuracy of the flaring test is improved.

As a further optimized scheme, the limiting and stopping piece is arranged on the top core in a position-adjustable manner along the vertical direction.

Has the advantages that: the limiting stop piece is adjustable in vertical position, the flaring amount of the sample can be changed by changing the position of the limiting stop piece, and the universality of the flaring sample tool is improved.

As a further optimized scheme, the limiting stop piece is a limiting nut which is assembled on the top core in a threaded manner;

the top core is provided with a thread section matched with the limiting nut, a guide section is arranged between the thread section and the flaring cone head, and the guide section is used for being in guide fit with the wall of the through hole of the top core.

Has the advantages that: the limiting stop piece is a limiting nut, stepless adjustment is achieved, the limiting nut and the ejection core are coaxially arranged, swinging is not prone to occurring, and the matching area of the limiting nut and the upper end face of the support is large.

As a further optimized scheme, the top core is of an integrated structure.

Has the advantages that: the top core is of an integrated structure, and is convenient to process and high in precision.

As a further optimized scheme, the support comprises an upper support and a lower support which are separately arranged, and the upper support is fixedly arranged on or supported on the lower support in a rotation stopping manner;

the supporting part is arranged on the lower support, and the top core is perforated on the upper support.

Has the advantages that: the support is processed in a split mode and then assembled, and is processed independently and more convenient and easier to assemble.

As a further optimized scheme, the test tool comprises at least two positioning pins which are distributed around the through hole of the top core at intervals, and the positioning pins are matched to enable the upper support to be supported on the lower support in a rotation stopping mode.

As a further optimized scheme, the supporting part is a base which is separately arranged on the lower support in a penetrating manner, a positioning hole for the sample to penetrate in a matching manner is arranged on the base, or a positioning column for the test to be sleeved in a matching manner is arranged on the base.

Has the advantages that: the base components of a whole that can function independently are worn and installed on the lower support, and only the base needs to be replaced aiming at samples with different specifications, the whole lower support does not need to be replaced, and the cost is saved.

Drawings

FIG. 1 is a schematic view of an embodiment 1 of a flaring test fixture of the present invention;

FIG. 2 is a diagram illustrating a state of operation of an embodiment 1 of a flaring test fixture according to the present invention;

FIG. 3 is a schematic diagram of an embodiment 1 of a flaring test fixture of the present invention;

FIG. 4 is a schematic diagram illustrating the fitting of a lower support and a base in embodiment 1 of the flaring test fixture of the present invention;

FIG. 5 is a schematic diagram of the fit of a lower support, a base and a positioning pin in embodiment 1 of the flaring test fixture of the present invention;

FIG. 6 is a schematic diagram of the lower support, the base, the positioning pin and the flaring nut in embodiment 1 of the flaring test fixture of the present invention;

fig. 7 is a schematic diagram of the cooperation of a lower support, a base, a positioning pin, a flaring nut, and an upper support in embodiment 1 of the flaring test fixture of the present invention.

Description of reference numerals:

100. an upper support; 101. perforating the top core; 200. a lower support; 201. punching a positioning pin; 300. a base; 301. positioning holes; 400. positioning pins; 500. a core; 501. a threaded segment; 502. a guide section; 503. flaring conical heads; 600. a limit nut; 700. a flaring nut; 800. a press machine.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising an … …" do not exclude the inclusion of such elements in processes or methods.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "provided" may be used in a broad sense, for example, the object of "provided" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or a non-detachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.

The present invention will be described in further detail with reference to examples.

The specific embodiment 1 of the flaring test tool provided by the invention:

as shown in fig. 1 to 7, the flaring test tool is used for quantitatively flaring a sample, so that the flaring efficiency is improved, and the designed flaring amount is ensured. In the present embodiment, the flaring of the flaring end of the flaring nut 700 by 1.2 times is described as an example.

The flaring test tool comprises a support which is used for positioning and supporting the flaring nut 700 and guiding the top core 500 to penetrate, as shown in fig. 1 and 2, the support comprises an upper support 100 and a lower support 200, and the upper support 100 is positioned and supported on the lower support 200 through at least two positioning pins 400, namely, the upper support 100 cannot translate or rotate relative to the lower support 200 in the horizontal direction. A base through hole (not shown) is formed in the lower base 200, and a top core through hole 101 is formed in the upper base 100, and the base through hole and the top core through hole 101 are coaxially arranged. The base 300 is inserted into the base through hole, where the base 300 is inserted into the lower support 200, but there is no connection between the base 300 and the lower support 200, and there is a clearance fit between the base 300 and the lower support 200. A vertically through positioning hole 301 is formed in the base 300, and the size of the positioning hole 301 is consistent with the size of the lower end of the flared nut 700, so that the flared nut 700 can be positioned and placed in the positioning hole 301.

As shown in fig. 4, in order to install the positioning pins 400, positioning pin through holes 201 are formed in the top surface of the lower support 200, the positioning pin through holes 201 are blind holes, and the number of the positioning pin through holes 201 is consistent with the number of the positioning pins 400.

As shown in fig. 1 and 2, a top core 500 is inserted into the top core through hole 101 of the upper support 100, the top core 500 is of an integrated structure, the top core 500 includes a thread section 501, a guide section 502 and a flaring cone 503 which are arranged from top to bottom, the thread section 501 has external threads, the guide section 502 has a smooth outer wall surface, and is used for guiding and matching with the inner wall surface of the top core through hole 101, the flaring cone 503 is of a conical structure, and the cone angle of the flaring cone 503 in this embodiment is 60 °. The upper end of the plunger 500 is adapted to cooperate with the press 800 to receive the downward pressing force of the press 800. After the top core 500 is inserted into the top core penetration hole 101, the upper end of the top core 500 is positioned above the upper end surface of the upper holder 100.

As shown in fig. 1 and 2, a stop nut 600 is screwed on the threaded section 501, where the stop nut 600 is a hexagonal nut, and an annular lower end surface of the stop nut 600 is used for stop-fitting with the top surface of the upper support 100, so as to limit the downward movement distance of the top core 500.

In the invention, the downward stroke Y of the top core 500 is controlled by adjusting the distance Z between the limit nut 600 and the top surface of the upper support 100, and since the taper of the flaring conical head 503 is 60 degrees, when the diameter D of the flaring end of the flaring nut 700 is expanded to 1.2 times of the standard requirement, Y = (1.2D-D)/2/tan 30 can be obtained by a tangent trigonometric function. The Z value is equal to the Y value, and the Z value is controlled by adjusting the position of the limit nut 600 on the top core 500. When the press 800 pushes the top core 500 downwards relatively, the stop nut 600 is driven to move downwards together, and after the stop nut 600 contacts with the top surface of the upper support 100, the stop nut 600 plays a role in limiting the top core 500, so that the flaring conical head 503 cannot continue to move downwards, and the flaring test is completed at the moment.

In this embodiment, the installation sequence of the flaring test fixture is as shown in fig. 4 to 7, and the base 300 is first inserted into the lower support 200; then the positioning pin 400 is inserted into the lower support 200; then, positioning the flaring nut 700 on the base 300, wherein the supporting surface of the flaring nut 700 is attached to the top surface of the base 300, and the flaring end faces upwards; then, the upper support 100 is positioned and placed outside the positioning pin 400 (the bottom surface of the upper support 100 is also provided with a positioning pin through hole), and is attached to the lower support 200; and (3) loading the top core 500, inserting the flaring conical head 503 of the top core 500 into the flaring nut 700, screwing the limiting nut 600, calculating the adjustment height through a formula, and performing a test after adjustment. During the test, the support and the press machine 800 move up and down relatively, that is, the support can be fixed, and the press machine 800 pushes the top core 500 downwards; or the press 800 is still, and the support drives the flaring nut 700 and the top core 500 to move upwards; or both the press 800 and the support may move.

It should be noted that, in the present embodiment, the flaring of the flaring end of the flaring nut 700 is taken as an example for description, and actually, the flaring test tool in the present embodiment is suitable for other samples that need to be flared.

In this embodiment, the base 300 of the lower support 200 is used to position and support the sample, thereby forming a support portion on the support. The upper bracket 100 is supported on the lower bracket 200 by at least two positioning pins 400. The limit nut 600 forms a limit stop for stop-fitting with the upper end surface of the support.

The specific embodiment 2 of the flaring test tool of the invention:

in embodiment 1, the base has a positioning hole for the sample to fit through. In this embodiment, the positioning hole may be a blind hole. When the sample is a tube/cylinder and has no external stop edge, the positioning hole on the base is replaced by a positioning column for the tube/cylinder to be matched and sleeved.

Specific embodiment 3 of the flaring test fixture of the present invention:

in embodiment 1, the base is separately inserted into the lower support. In this embodiment, the base may be integrally formed on the lower support, that is, the supporting portion may be a portion of the lower support having a positioning hole or a positioning post.

Specific embodiment 4 of the flaring test fixture of the present invention:

in embodiment 1, the sample tool includes at least two positioning pins, so that the upper support is supported on the lower support in a rotation stopping manner. In this embodiment, the upper support and the lower support may be fixedly assembled together, and may specifically adopt a bolt-nut connection mode.

The specific embodiment 5 of the flaring test tool of the invention:

in embodiment 1, the support includes an upper support and a lower support which are separately arranged. In this embodiment, the support may be an integral structure, and the sample is placed into the support portion from the top core perforation above.

Embodiment 6 of the flaring test fixture of the present invention:

in example 1, the core was of a one-piece structure. In this embodiment, the top core may be a split structure, specifically, the top core includes a flaring cone head and a straight rod which are connected by a thread, wherein the straight rod has a thread section and a guide section. Or the top core comprises a flaring conical head and a straight rod, and the flaring conical head and the straight rod are only in top pressure relation and are not connected.

Embodiment 7 of the flaring test fixture of the present invention:

in embodiment 1, the limit stopper is a limit nut. In this embodiment, the limiting stop member may be a limiting rod, wherein the limiting rod penetrates through the top core. In order to adjust the upper and lower positions of the limiting rod, a row of a plurality of through holes which are arranged at intervals up and down can be arranged on the top core. Of course, the limiting rod can also be fixed on the top core and can not be adjusted up and down any more.

The specific embodiment of the flaring test tool of the invention 8:

in embodiment 1, the taper of the flaring cone head can be changed according to actual conditions.

Finally, although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments without departing from the inventive concept, or some of the technical features may be replaced with equivalents. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a flaring test frock which characterized in that: the method comprises the following steps:

the support is provided with a supporting part for upwards positioning and supporting the sample, and a top core perforation (101) is arranged above the supporting part;

the top core (500) is guided to penetrate through the top core through hole (101) in the up-down direction, the top core (500) comprises a flaring conical head (503) at the lower end, the flaring conical head (503) is used for jacking the sample, the flaring conical head (503) flares the sample when the top core (500) moves downwards relative to the sample, and the upper end of the top core (500) is positioned above the upper end face of the support;

and the limiting and stopping piece is arranged on the top core (500) and is used for being matched with the upper end surface of the support in a stopping way along the vertical direction so as to limit the downward moving stroke of the top core (500) relative to the sample.

2. The flaring test fixture of claim 1, characterized in that: the limiting and stopping piece is arranged on the top core (500) in a vertically adjustable manner.

3. The flaring test fixture of claim 2, characterized in that: the limiting stop piece is a limiting nut (600) which is assembled on the top core (500) in a threaded manner;

the top core (500) is provided with a thread section (501) matched with the limiting nut (600), a guide section (502) is arranged between the thread section (501) and the flaring cone head (503), and the guide section (502) is used for being matched with the hole wall of the top core through hole (101) in a guide mode.

4. The flaring test fixture of claim 1, 2 or 3, characterized in that: the top core (500) is of an integrated structure.

5. The flaring test fixture of claim 1, 2 or 3, characterized in that: the support comprises an upper support (100) and a lower support (200) which are arranged in a split manner, wherein the upper support (100) is fixedly arranged on or supported on the lower support (200) in a rotation stopping manner;

the supporting part is arranged on the lower support (200), and the top core through hole (101) is arranged on the upper support (100).

6. The flaring test fixture of claim 5, characterized in that: the test tool comprises at least two positioning pins (400) which are distributed around the top core through hole (101) at intervals, and the positioning pins (400) are matched to enable the upper support (100) to be supported on the lower support (200) in a rotation stopping mode.

7. The flaring test fixture of claim 5, characterized in that: the supporting part is a base (300) which is arranged on the lower support (200) in a split penetrating mode, a positioning hole (301) for the sample to penetrate in a matching mode is formed in the base (300), or a positioning column for the test matching in a sleeving mode is arranged on the base (300).