CN220084547U - Screw thread tensile strength test fixture - Google Patents

Abstract

The utility model relates to a thread tensile strength testing tool, which is used for testing the tensile strength of a threaded piece and comprises the following components: the first drawing die is provided with a first step groove which is used for accommodating a threaded part of the threaded piece; the second drawing die is arranged opposite to the first drawing die along the first direction; a screw fitting for screw-coupling with the screw part; the first drawing die can be detachably connected with the second drawing die through the threaded piece or the threaded matching piece, and the first drawing die and the second drawing die can be mutually far away along the first direction so as to stretch the threaded piece. According to the utility model, through the first drawing die, the first step groove on the first drawing die, the threaded matching piece and the matching arrangement of the second drawing die, the tensile strength of various types of threaded pieces can be tested, the operation is simple, and the universality is high.

Description

Screw thread tensile strength test fixture

Technical Field

The utility model relates to the technical field of mechanical property testing devices, in particular to a screw tensile strength testing tool.

Background

Threaded connections are widely used in the use of carbon fiber composite structural members. And the high-temperature treated threads need to be subjected to tensile force test to verify the reliability and bearing capacity of the threads.

The existing device for testing the tension of the threads is poor in universality, cannot be suitable for threaded pieces of different types, is complex in operation and is low in testing efficiency.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the screw tensile strength testing tool which is simple in structure, can test the tensile strength of various screw parts, is simple to operate and has strong universality.

The utility model provides a thread tensile strength testing tool, which is used for testing the tensile strength of a threaded piece and comprises the following components:

a first die provided with a first stepped groove for accommodating a threaded portion of the threaded member;

the second drawing die is arranged opposite to the first drawing die along the first direction;

a screw-threaded fitting for screw-connection with the screw-threaded portion;

the first drawing die can be detachably connected with the second drawing die through the threaded piece or the threaded matching piece, and the first drawing die and the second drawing die can be mutually far away along the first direction so as to stretch the threaded piece.

The thread tensile strength testing tool provided by the utility model has at least the following beneficial effects:

according to the thread tensile strength testing tool, the first step groove is formed in the first drawing die and the second step groove is formed in the second drawing die, the thread matching piece matched with the to-be-tested thread piece is arranged on the first drawing die, when the to-be-tested thread piece is an external thread product, namely, the thread part of the thread piece is an external thread, the thread part of the thread piece can extend into the first step groove, the thread matching piece is screwed on the thread part of the thread piece and is abutted to the step surface of the first step groove, and then one end, far away from the first drawing die, of the thread piece is detachably connected with the second drawing die. The first drawing die is detachably connected with the second drawing die through the threaded piece, the first drawing die and the second drawing die are far away from each other along the first direction, and the tensile strength of the threaded part of the threaded piece is tested through stretching the threaded piece.

When the threaded piece to be tested is an internal threaded product, namely, when the threaded part of the threaded piece is an internal thread, the threaded piece can be placed on the step surface of the first step groove, then the threaded matching piece stretches into the first step groove and is in threaded connection with the threaded part of the threaded piece, and then one end, far away from the first drawing die, of the threaded matching piece is detachably connected with the second drawing die. At this time, first drawing die is through screw thread mating piece and second drawing die detachably connection promptly, first drawing die with the second drawing die is followed first direction is kept away from each other, and screw thread spare is indirectly stretched through tensile screw thread mating piece, and then realizes the screw thread portion tensile strength of test screw thread spare.

According to the utility model, through the first drawing die, the first step groove on the first drawing die, the threaded matching piece and the second drawing die, no matter the threaded piece to be tested is an external threaded product or an internal threaded product, the threaded piece to be tested can be correspondingly adapted, and the larger accommodating space of the first step groove is utilized, and the adaptation of threaded pieces to be tested with different lengths and different sizes is realized by changing the specification of the threaded matching piece, so that the tensile strength test of various types of threaded pieces is realized, the operation is simple, and the universality is high.

In some embodiments, the first step groove comprises a first hollow cavity and a first avoidance port communicated with the first hollow cavity, the first avoidance port is used for allowing the threaded piece or the threaded mating piece to extend in, and a step surface used for limiting the threaded mating piece or the threaded piece is formed between the first hollow cavity and the first avoidance port.

In some embodiments, the two ends of the threaded piece are provided with threaded portions, the second drawing die is provided with a second step groove, the second step groove is used for accommodating the threaded portions of the threaded piece far away from the first drawing die, and the threaded matching piece is provided with two threaded portions and is respectively used for being in one-to-one threaded connection with the two threaded portions of the threaded piece.

In some embodiments, the threaded member is a double-ended screw, the threaded portion is an external thread of the double-ended screw, and the threaded mating member is a fastening nut that mates with the external thread of the double-ended screw.

In some embodiments, the threaded portion is an internal thread formed on the threaded member, the threaded mating member extends into the first stepped groove and is connected with the internal thread of the threaded member in a mating manner, and the first die is detachably connected with the second die through the threaded mating member.

In some embodiments, a gasket is included, the gasket being disposed between the threaded member and the threaded mating member and abutting the step face of the first step groove.

In some embodiments, the threaded member is a nut, the threaded mating member is a bolt, a shank of the bolt extends into the first stepped groove and is in threaded connection with the nut, and the second die is provided with a second stepped groove for allowing a head of the bolt to extend into and be clamped with the head of the bolt.

In some embodiments, the first die and the second die are symmetrical about a second direction, the first direction being perpendicular to the second direction.

In some embodiments, the first die has a first mounting shaft thereon, and the second die has a second mounting shaft thereon, the first mounting shaft and the second mounting shaft being configured to be detachably connected to two outputs of the tensile testing machine, respectively.

In some embodiments, a first locking nut is arranged on the first mounting shaft, a second locking nut is arranged on the second mounting shaft, and the first locking nut and the second locking nut are respectively used for locking two output ends of the tensile testing machine.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic structural diagram of a screw tensile strength testing tool according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a screw member according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the structures of a first die and a second die according to an embodiment of the present utility model;

FIG. 4 is a schematic view of another structure of a tool for testing tensile strength of threads according to an embodiment of the utility model;

fig. 5 is another schematic structural view of a screw according to an embodiment of the present utility model.

Reference numerals illustrate: a first die 100; a first step groove 110; a first hollow cavity 111; a first escape port 112; a step surface 113; a first mounting shaft 120; a first lock nut 130; a second drawing die 200; a second stepped groove 210; a second mounting shaft 220; a second lock nut 230; a threaded fitting 300; a stem 310; a head 320; a gasket 400; a screw 500; a threaded portion 510; a first direction X; a second direction Y.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present utility model, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present utility model, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

Referring to fig. 1, 2 and 3, the present utility model provides a screw tensile strength testing tool for testing tensile strength of a screw member, which includes a first drawing die 100, a second drawing die 200 and a screw mating member 300.

Wherein the first drawing die 100 is provided with a first stepped groove 110, the first stepped groove 110 being for receiving the threaded portion 510 of the screw 500. The second die 200 is disposed opposite to the first die 100 along the first direction X. The screw-fit 300 is for screw-coupling with the screw portion 510. The first drawing die 100 can be detachably connected with the second drawing die 200 through the screw 500, or the first drawing die 100 can be detachably connected with the second drawing die 200 through the screw 300.

The first and second dies 100, 200 can be moved away from each other in the first direction X to stretch the screw 500.

It should be noted that, in the present utility model, the screw fitting 300 may be a structural member having external threads or internal threads, and of course, the screw fitting 300 may also have both internal threads and external threads to be correspondingly screwed with the threaded portion of the screw fitting 500 to be tested. When the screw 500 to be measured is an external screw product, the first drawing die 100 is detachably connected with the second drawing die 200 through the screw 500. When the screw 500 to be measured is an internally threaded product, the first drawing die 100 is detachably connected with the second drawing die 200 through the screw-fit 300.

In addition, it should be noted that, when the operator performs the tensile strength test on the to-be-tested threaded member 500, the first drawing die 100 and the second drawing die 200 may be respectively connected to the output end of the tensile testing machine, and the tensile testing machine is a universal member. The tensile strength testing device drives the first drawing die 100 and the second drawing die 200 to be far away from each other along the first direction X, so that the threaded piece 500 to be tested is stretched, and the tensile strength testing of the threaded portion 510 of the threaded piece 500 to be tested is realized. In the present utility model, the first direction X is the up-down direction. And the opening side of the first stepped groove 110 on the first drawing die 100 is directed toward the second drawing die 200 to facilitate the insertion of the screw portion 510 of the screw 500.

According to the thread tensile strength testing tool disclosed by the utility model, by arranging the first drawing die 100 and the second drawing die 200 which are opposite, the first step groove 110 is arranged on the first drawing die 100, and the thread matching piece 300 matched with the thread piece 500 to be tested is arranged, as shown in fig. 1, 2 and 3, when the thread piece 500 to be tested is an external thread product, namely, the thread part 510 of the thread piece 500 is an external thread, the thread part 510 of the thread piece 500 can be stretched into the first step groove 110, the thread matching piece 300 is screwed on the thread part 510 of the thread piece 500 and is abutted against the step surface of the first step groove 110, and then one end, far away from the first drawing die 100, of the thread piece 500 is detachably connected with the second drawing die 200. At this time, the first die 100 is detachably connected to the second die 200 through the screw 500, the first die 100 and the second die 200 are separated from each other in the first direction X, and the tensile strength of the screw portion 510 of the screw 500 is tested by stretching the screw 500.

Referring to fig. 3, 4 and 5, when the screw 500 to be measured is an internal screw product, that is, when the screw portion 510 of the screw 500 is an internal screw, the screw 500 may be placed on the stepped surface of the first stepped groove 110, the screw 300 may be inserted into the first stepped groove 110 and screwed with the screw portion 510 of the screw 500, and then one end of the screw 300 far from the first drawing die 100 may be detachably connected with the second drawing die 200. At this time, the first drawing die 100 is detachably connected to the second drawing die 200 through the screw matching member 300, the first drawing die 100 and the second drawing die 200 are far away from each other along the first direction X, and the screw 500 is indirectly drawn by stretching the screw matching member 300, so as to further realize the testing of the tensile strength of the screw portion 510 of the screw 500.

The utility model can be correspondingly adapted through the first drawing die 100, the first step groove 110 on the first drawing die 100, the threaded fitting 300 and the matching arrangement of the second drawing die 200, no matter the threaded fitting 500 to be tested is an external threaded product or an internal threaded product. And utilize the great accommodation space of first step groove 110 to through changing the specification of screw thread mating piece 300, realize the adaptation to the screw thread piece 500 that awaits measuring of different length, equidimension, thereby realize the test to the tensile strength of multiple type screw thread piece, easy operation has stronger commonality.

In some embodiments, referring to fig. 3, the first stepped groove 110 includes a first hollow cavity 111 and a first escape port 112 communicating with the first hollow cavity 111, the first escape port 112 being configured to allow the screw member 500 or the screw member 300 to extend into, and a stepped surface 113 for limiting the screw member 300 or the screw member 500 being formed between the first hollow cavity 111 and the first escape port 112.

Specifically, the first drawing die 100 is configured as a solid of revolution structure. The first hollow cavity 111 is coaxially connected with the first avoiding port 112, and the first hollow cavity 111 is arranged in a hollow manner along a second direction Y, the second direction Y is perpendicular to the first direction X, and the second direction Y is a horizontal direction.

When the to-be-measured threaded member 500 is an external threaded product, if the to-be-measured threaded member 500 is a screw rod, the external threads of the threaded member 500 can extend into the first hollow cavity 111 through the first avoidance opening 112, and then the threaded fitting 300 extends into the first hollow cavity 111 from two sides of the first hollow cavity 111 and is screwed and fitted on the external threads of the threaded member 500, so that the external threads of the threaded member 500 are fixed on the first drawing die 100, and at this time, the threaded fitting 300 abuts against the step surface 113 formed between the first hollow cavity 111 and the first avoidance opening 112, so that the threaded fitting 300 is limited in the vertical direction by the step surface 113.

When the screw member 500 to be tested is an internal thread product, if the screw member 500 to be tested is a nut, the screw member 500 can be integrally abutted against the step surface 113 formed between the first hollow cavity 111 and the first avoiding opening 112, and then the screw matching member 300 is extended into the first avoiding opening 112 and is matched and connected with the internal thread of the screw member 500, so that the screw member 500 is fixed on the step surface 113 formed between the first hollow cavity 111 and the first avoiding opening 112 through the screw matching member 300, and is limited by the step surface 113 in the up-down direction.

It is to be understood that the first hollow cavity 111 and the first avoidance port 112 which are vertically distributed and communicated are arranged in the utility model, so that the threaded fitting 300 is convenient to be assembled and disassembled with the threaded fitting 500 to be tested, the installation procedure of the threaded fitting 500 to be tested is simplified, and meanwhile, the stability of the threaded fitting 500 to be tested in the tensile test is effectively ensured by the step surface 113 formed between the first hollow cavity 111 and the first avoidance port 112, and the accuracy of the tensile strength test of the threaded fitting 500 to be tested is further improved. In addition, the calibers of the first step groove 110 and the first avoiding port 112 can also be adapted to threaded pieces 500 with different sizes and different lengths, so that the universality of the test tool is further improved.

In some embodiments of the present utility model, referring to fig. 1, 2 and 3, both ends of the screw 500 have screw portions 510, the second drawing die 200 is provided with a second stepped groove 210, the second stepped groove 210 is used to accommodate the screw 500 away from the screw portions 510 of the first drawing die 100, and the screw-engaging member 300 has two screw portions and is used to be screw-coupled with the two screw portions 510 of the screw 500, respectively.

Specifically, the screw 500 is a double-ended screw, the screw thread portion 510 is an external thread of the double-ended screw, and the screw-fitting 300 is a fastening nut fitted with the external thread of the double-ended screw. The second stepped groove 210 opens toward the first drawing die 100. Likewise, the second step groove 210 comprises a second hollow cavity and a second avoidance port communicated with the second hollow cavity, the second hollow cavity is coaxially connected with the second avoidance port, a step surface is formed between the second hollow cavity and the second avoidance port, the second hollow cavity is used for allowing the lower end of the double-ended screw to extend in, and the second hollow cavity is hollow along the second direction Y, so that the corresponding fastening nut and the double-ended screw can be conveniently matched and assembled.

It is to be understood that the upper and lower ends of the double-ended screw are provided with external threads, and the two fastening nuts are in threaded fit with the external threads at the two ends of the double-ended screw. When the double-end screw rod to be tested is installed, external threads at the upper end and the lower end of the double-end screw rod can be respectively inserted into the first step groove 110 on the first drawing die 100 and the second step groove 210 on the second drawing die 200, and then the two fastening nuts are respectively screwed on the corresponding external threads on the double-end screw rod and respectively abutted against the step surface of the first step groove 110 and the step surface of the second step groove 210, at the moment, the two fastening nuts are detachably connected through the double-end screw rod to be tested, so that the double-end screw rod to be tested is installed. The tensile testing machine drives the first drawing die 100 and the second drawing die 200 to be far away from each other along the first direction X, namely, the tensile strength of the two external threads of the double-ended screw is tested simultaneously, so that the testing efficiency of the tensile strength of the double-ended screw is improved.

In some embodiments of the present utility model, referring to fig. 4 and 5, the screw part 510 is an internal screw thread formed in the screw member 500, and the screw fitting member 300 is inserted into the first stepped groove 110 and is coupled with the internal screw thread of the screw member 500, and the first drawing die 100 is detachably coupled with the second drawing die 200 through the screw fitting member 300.

Specifically, the screw 500 is a nut, the screw 300 is a bolt, the shaft 310 of the bolt extends into the first stepped groove 110 and is in threaded connection with the nut, the second drawing die 200 is provided with a second stepped groove 210, and the second stepped groove 210 is used for extending the head 320 of the bolt into and clamping the head 320 of the bolt.

It can be understood that in this embodiment, the threaded member 500 is a nut to be tested, and the threaded mating member 300 is a bolt that is mated with the nut to be tested.

Through setting up screw thread fitting 300 to be the bolt structure to set up second step groove 210 at second drawing die 200, make screw thread fitting 300 and the nut cooperation of awaiting measuring be connected, can be with the head joint of bolt on the step face of second step groove 210 in advance, the external screw thread of reuse bolt shank portion cooperates with the internal thread of nut of awaiting measuring, realizes the fastening assembly of nut of awaiting measuring, changes the specification of bolt, can realize the adaptation to the nut of awaiting measuring of different specifications. Therefore, the assembly process of the nut to be tested is simplified, and the universality of the test tool is further improved.

In addition, in order to enhance the installation stability of the screw 500, referring to fig. 4 again, the screw tensile strength testing tool of the present utility model further includes a gasket 400, where the gasket 400 is disposed between the screw 500 and the screw mating member 300 and abuts against the step surface of the first step groove 110.

In this embodiment, the screw 500 is a nut to be tested, and the nut to be tested can be abutted against the step surface of the first step groove 110 through the spacer 400. The gasket 400 is sleeved at the middle part of the nut to be tested and protrudes out of the outer wall of the nut to be tested, so that the lower end of the nut to be tested can extend into the first avoiding opening 112 of the first step groove 110 to be matched and connected with the rod part of the bolt positioned in the first avoiding opening 112, and the assembly of the nut to be tested is completed. Of course, the nut to be tested and the spacer 400 may be integrally formed.

It will be appreciated that the above-described arrangement of the spacer 400 not only facilitates the assembly of the screw 500 to be tested, but also enhances the mounting stability of the screw 500 to be tested.

In some embodiments of the present utility model, referring to fig. 1 and 4, the first and second dies 100 and 200 are symmetrical with respect to the second direction Y, and the first direction X is perpendicular to the second direction Y.

It is easy to understand that the first drawing die 100 and the second drawing die 200 have the same structural shape, so that the manufacturing cost of the first drawing die 100 and the second drawing die 200 is reduced, and the aesthetic property of the whole structure of the test tool is improved. At the same time, the first drawing die 100 and the second drawing die 200 are also made to be coaxial in the first direction X, ensuring the stretching straightness in the process of testing the tensile strength of the screw 500.

In some embodiments of the present utility model, referring to fig. 1, 3 and 4, the first die 100 has a first mounting shaft 120 thereon, and the second die 200 has a second mounting shaft 220 thereon, and the first mounting shaft 120 and the second mounting shaft 220 are respectively detachably connected to two output ends of the tensile tester.

Specifically, the first mounting shaft 120 is disposed at an upper end of the first drawing die 100, and the second mounting shaft 220 is disposed at a lower end of the second drawing die 200. The first mounting shaft 120 and the second mounting shaft 220 are provided with external threads, and at the same time, the first mounting shaft 120 is provided with a first lock nut 130 which is matched with the external threads. Similarly, the second mounting shaft 220 is also provided with a second locking nut 230 which is matched with external threads on the second mounting shaft, and the first mounting shaft 120 and the second mounting shaft 220 are respectively locked at two output ends of the tensile testing machine through the matching of the first locking nut 130 and the second locking nut 230 with corresponding external threads. Thus, the first drawing die 100 and the second drawing die 200 are connected with the tensile testing machine, and the device is stable to install and convenient to disassemble.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A screw thread tensile strength test fixture for test screw's tensile strength, its characterized in that includes:

a first die provided with a first stepped groove for accommodating a threaded portion of the threaded member;

the second drawing die is arranged opposite to the first drawing die along the first direction;

a screw-threaded fitting for screw-connection with the screw-threaded portion;

the first drawing die can be detachably connected with the second drawing die through the threaded piece or the threaded matching piece, and the first drawing die and the second drawing die can be mutually far away along the first direction so as to stretch the threaded piece.

2. The threaded tensile strength test fixture of claim 1, wherein the first step groove comprises a first hollow cavity and a first avoidance port communicated with the first hollow cavity, the first avoidance port is used for allowing the threaded piece or the threaded mating piece to extend in, and a step surface used for limiting the threaded mating piece or the threaded piece is formed between the first hollow cavity and the first avoidance port.

3. The tool for testing tensile strength of threads according to claim 1 or 2, wherein both ends of the threaded member are provided with threaded portions, the second die is provided with a second stepped groove for accommodating the threaded portions of the threaded member away from the first die, and the threaded mating members are provided with two threaded portions and are respectively in one-to-one threaded connection with the two threaded portions of the threaded member.

4. The threaded tensile strength test fixture of claim 3, wherein the threaded member is a double-ended screw, the threaded portion is an external thread of the double-ended screw, and the threaded mating member is a fastening nut mated with the external thread of the double-ended screw.

5. The tool for testing tensile strength of threads according to claim 1 or 2, wherein the threaded portion is an internal thread formed in the threaded member, the threaded mating member extends into the first stepped groove and is connected with the internal thread of the threaded member in a mating manner, and the first die is detachably connected with the second die through the threaded mating member.

6. The tool for testing tensile strength of threads according to claim 5, comprising a gasket, wherein the gasket is arranged between the threaded member and the threaded mating member and abuts against the step surface of the first step groove.

7. The tool for testing tensile strength of threads according to claim 5, wherein the threaded member is a nut, the threaded mating member is a bolt, a shaft portion of the bolt extends into the first stepped groove and is in threaded connection with the nut, and the second die is provided with a second stepped groove, and the second stepped groove is used for enabling a head portion of the bolt to extend into and be clamped with the head portion of the bolt.

8. The threaded tensile strength test fixture of claim 1, wherein the first die and the second die are symmetrical about a second direction, the first direction being perpendicular to the second direction.

9. The threaded tensile strength testing tool according to claim 1, wherein the first die is provided with a first mounting shaft, the second die is provided with a second mounting shaft, and the first mounting shaft and the second mounting shaft are respectively detachably connected with two output ends of the tensile testing machine.

10. The threaded tensile strength testing tool according to claim 9, wherein a first locking nut is arranged on the first mounting shaft, a second locking nut is arranged on the second mounting shaft, and the first locking nut and the second locking nut are respectively used for locking two output ends of the tensile testing machine.