Tool for machining cast pipe high-temperature tensile test bar

Abstract

The utility model discloses a tool for machining a cast pipe high-temperature tensile test bar, which belongs to the field of cast pipe high-temperature tensile test bar machining, and comprises a test bar tool which is clamped on a three-jaw self-centering chuck and can clamp a tensile test bar blank material, and the test bar tool comprises a first semi-arc piece and a second semi-arc piece which are oppositely arranged; a first protection blocking piece is arranged at the upper end of the first semi-arc piece or the second semi-arc piece, a second protection blocking piece is arranged at the lower end of the first semi-arc piece or the second semi-arc piece, and an inner hole is formed in the center after the first semi-arc piece and the second semi-arc piece are assembled. The ends, exposed out of the three-jaw self-centering chuck, of the first semi-arc piece and the second semi-arc piece are each provided with a blocking table. According to the utility model, the stretching test bar blanks to be processed do not need to be aligned one by one, the speed is high, the centering is accurate, the centrifugal force does not deviate during processing, the lathe operation is stable, and the processing quality is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the field of processing a cast pipe high-temperature tensile test bar, in particular to a tool for processing a cast pipe high-temperature tensile test bar. Background Art

[0002] In the research of cast pipes, it is often necessary to process high-temperature tensile test bars (high-temperature tensile test bars are used to determine the yield strength, tensile strength and elongation performance indicators of ductile cast pipes). The blanks for processing high-temperature tensile test bars are processed into square strips on the circumferential tube body of the cast pipe through a sawing process, and then transferred to the next process lathe for processing. The lathe is clamped with a three-jaw self-centering chuck (or a four-jaw chuck). Due to the characteristics of the three-jaw (or four-jaw) chuck itself, there is a center offset during clamping, and it needs to be adjusted repeatedly for several times before it can be barely processed. The production efficiency is low, and there are certain problems with the quality of the processed tensile test bars, which cannot meet the user's requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a tooling for processing high-temperature tensile test bars of cast pipes, which does not need to align the tensile test bar blanks to be processed one by one, has high speed, accurate centering, no centrifugal force deviation during processing, and runs smoothly on the lathe, effectively ensuring the processing quality.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A tool for processing a high-temperature tensile test bar for a cast pipe, comprising a test bar tool that is clamped on a three-jaw self-centering chuck and can clamp a tensile test bar blank, the test bar tool comprising a first semi-circular arc piece and a second semi-circular arc piece that are relatively arranged; a first protective baffle is arranged at the upper end of the first semi-circular arc piece or the second semi-circular arc piece, and a second protective baffle is arranged at the lower end of the first semi-circular arc piece or the second semi-circular arc piece, an inner hole is formed in the center of the first semi-circular arc piece and the second semi-circular arc piece after being assembled; a baffle is arranged at one end of the first semi-circular arc piece and the second semi-circular arc piece that is exposed from the three-jaw self-centering chuck.

[0006] A further improvement of the technical solution of the utility model is that the diameter of the inner hole is the square diagonal size of the tensile test bar blank.

[0007] A further improvement of the technical solution of the utility model is that the outer diameter of the test rod fixture is 60 mm.

[0008] A further improvement of the technical solution of the utility model is that the length of the test rod tooling is the length of the chuck jaws of the three-jaw self-centering chuck of the lathe.

[0009] A further improvement of the technical solution of the utility model is that the first protective baffle and the second protective baffle are both configured as arc-shaped pieces, and the inner diameter of the arc-shaped pieces is not less than the outer diameter of the test rod tooling.

[0010] A further improvement of the technical solution of the utility model is that: the first protective baffle is welded to the upper end of the first semi-circular arc part; and the second protective baffle is welded to the lower end of the first semi-circular arc part.

[0011] A further improvement of the technical solution of the utility model is that: the first protective baffle is welded to the upper end of the second semi-circular arc part; and the second protective baffle is welded to the lower end of the second semi-circular arc part.

[0012] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0013] 1. The tooling for processing high-temperature tensile test bars of cast pipes provided by the utility model can quickly align and clamp the long "square" blanks to be processed, without the need to align and clamp them one by one. It has the advantages of fast speed and accurate centering, no centrifugal force deviation during processing, and stable operation during lathe processing, which can ensure that the processing quality meets user requirements, and is simple to operate, convenient to clamp, and has high production efficiency.

[0014] 2. In the present invention, a protective baffle is welded on each side of a semi-circular arc part, the purpose of which is to protect the other semi-circular arc part when the two semi-circular arc parts are put together, so as to prevent the misalignment caused by vibration during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the use of a tooling for processing a cast pipe high-temperature tensile test bar provided in an embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of a tooling structure for processing a cast pipe high-temperature tensile test bar in an embodiment of the utility model;

[0018] Figure 3 It is a side view of a tooling for processing a high-temperature tensile test bar of a cast pipe in an embodiment of the utility model;

[0019] Among them, 1. three-jaw self-centering chuck; 2. test bar tooling; 2-1. first semi-circular arc part; 2-2. second semi-circular arc part; 2-3. first protective baffle; 2-4. second protective baffle; 3. tensile test bar blank. DETAILED DESCRIPTION

[0020] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0024] like Figure 1-3As shown, a tooling for processing high-temperature tensile test bars of cast pipes includes a test bar tooling 2 that is clamped on a three-jaw self-centering chuck 1 and can clamp a tensile test bar blank 3, the test bar tooling includes a first semi-circular arc part 2-1 and a second semi-circular arc part 2-2 that are relatively arranged; a first protective baffle 2-3 is arranged at the upper end of the first semi-circular arc part 2-1 or the second semi-circular arc part 2-2, and a second protective baffle 2-4 is arranged at the lower end of the first semi-circular arc part 2-1 or the second semi-circular arc part 2-2, and an inner hole is formed in the center of the first semi-circular arc part 2-1 and the second semi-circular arc part 2-2 after being assembled; a baffle is arranged at one end of the first semi-circular arc part 2-1 and the second semi-circular arc part 2-2 that is exposed from the three-jaw self-centering chuck 1, and the function of the baffle is to prevent the test bar tooling 2 from being safely clamped in the three-jaw self-centering chuck 1, which is inconvenient to disassemble.

[0025] It should be noted that: Figure 3 In the side view of a tooling for processing a cast pipe high-temperature tensile test bar provided, the baffle is not drawn in order to facilitate understanding of the structures of the first semi-circular arc part 2-1, the second semi-circular arc part 2-2, the first protective baffle 2-3 and the second protective baffle 2-4.

[0026] Further, the diameter of the inner hole is the diagonal dimension of the tensile test bar blank 3. The diameter of the inner hole can be adjusted according to the outer dimensions of the tensile test bar blank.

[0027] Furthermore, the outer diameter of the test rod fixture 2 is 60 mm.

[0028] Furthermore, the length of the test rod fixture 2 is the length of the chuck jaws of the three-jaw self-centering chuck 1 of the lathe.

[0029] Furthermore, the first protective baffle 2 - 3 and the second protective baffle 2 - 4 are both configured as arc-shaped pieces, and the inner diameter of the arc-shaped piece is not less than the outer diameter of the test rod tooling 2 .

[0030] Furthermore, the first protective baffle 2-3 is welded to the upper end of the first semi-circular arc part 2-1; and the second protective baffle 2-4 is welded to the lower end of the first semi-circular arc part 2-1.

[0031] Furthermore, the first protective baffle 2-3 is welded to the upper end of the second semicircular arc part 2-2, and the second protective baffle 2-4 is welded to the lower end of the second semicircular arc part 2-2. The purpose of welding the protective baffle is to protect the other semicircular arc part when the two semicircular arc parts are put together, so as to avoid the phenomenon of misalignment caused by vibration during processing.

[0032] A method for using a tooling for processing a cast pipe high-temperature tensile test bar:

[0033] First, clamp two semi-circular arc parts (the first semi-circular arc part 2-1 and the second semi-circular arc part 2-2) with the three-jaw self-centering chuck 1 of the ordinary lathe, and then clamp the long "square" blank (tensile test bar blank 3) of the high-temperature tensile test bar to be processed with the two semi-circular arcs. This clamping method can accurately clamp the tensile test bar blank 3 at the center position of the three-jaw self-centering chuck 1, and this clamping method does not need to align the tensile test bar blank 3 to be processed one by one, has fast speed, accurate centering, no centrifugal force deviation during processing, stable operation of the lathe, and most importantly, the quality meets user requirements.

[0034] The tooling for processing the high-temperature tensile test bar of a cast pipe provided by the utility model is basically made of waste blanks, and the processing and manufacturing are simple and convenient, thereby reducing the production cost.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A tool for processing a high-temperature tensile test bar of a cast pipe, comprising a test bar tool (2) mounted on a three-jaw self-centering chuck (1) and capable of clamping a tensile test bar blank (3), characterized in that: The test rod tooling comprises a first semi-circular arc piece (2-1) and a second semi-circular arc piece (2-2) which are arranged opposite to each other; a first protective baffle (2-3) is arranged at the upper end of the first semi-circular arc piece (2-1) or the second semi-circular arc piece (2-2), and a second protective baffle (2-4) is arranged at the lower end of the first semi-circular arc piece (2-1) or the second semi-circular arc piece (2-2); an inner hole is formed at the center of the first semi-circular arc piece (2-1) and the second semi-circular arc piece (2-2) after being assembled; and a baffle is arranged at one end of the first semi-circular arc piece (2-1) and the second semi-circular arc piece (2-2) which is exposed from the three-jaw self-centering chuck (1).

2. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The diameter of the inner hole is the diagonal dimension of the tensile test bar blank (3).

3. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The outer diameter of the test rod fixture (2) is 60 mm.

4. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The length of the test rod tooling (2) is the same as the length of the chuck jaws of the three-jaw self-centering chuck (1).

5. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The first protective baffle (2-3) and the second protective baffle (2-4) are both configured as arc-shaped pieces, and the inner diameter of the arc-shaped piece is not less than the outer diameter of the test rod tooling (2).

6. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The first protective baffle (2-3) is welded to the upper end of the first semi-circular arc part (2-1); and the second protective baffle (2-4) is welded to the lower end of the first semi-circular arc part (2-1).

7. The tooling for processing high-temperature tensile test bars of cast pipes according to claim 1, characterized in that: The first protective baffle (2-3) is welded to the upper end of the second semi-circular arc part (2-2); and the second protective baffle (2-4) is welded to the lower end of the second semi-circular arc part (2-2).

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