Pin shearing device for test

Abstract

The utility model relates to a pin shearing device for testing, which is suitable for detecting pins and comprises a clamp structure, a press machine, a shearing block and a workpiece, the press machine is provided with a workbench and an upper pressing head, and a positioning column is arranged on the upper pressing head. The clamp structure is placed on the workbench, a containing groove is formed in the middle of the clamp structure, and the shearing block is inserted into the containing groove; a positioning hole is formed in the shearing block in the force application direction of the press machine and corresponds to the positioning column. The shearing block sleeves the positioning column through the positioning hole; a containing groove is formed in the upper portion of the clamp structure, the forming direction of the containing groove is perpendicular to the force application direction of the press machine, and the section of the containing groove is of a U-shaped structure. A limiting part is correspondingly arranged on the lower portion of the shearing block, the limiting part is of a U-shaped structure, the containing groove and the limiting part form a working cavity, and a workpiece is inserted into the working cavity; the workpiece is provided with a pin, and a notch of the pin faces upwards. The pin shearing device for the test is simple in structure and higher in measurement precision, and the obtained data of the shearing strength of the pin is more representative.

Description

Technical Field

[0001] This application relates to the field of pin shear test devices, and particularly to a pin shear device for testing. Background Art

[0002] As a commonly used connecting piece, pins are widely used in fields such as mechanical engineering, construction engineering, and aerospace. Their quality and performance are directly related to the safe and stable operation of engineering projects. By conducting pin shear experiments, the strength and stability of pins under shear forces can be evaluated to ensure compliance with relevant standards and requirements.

[0003] During the force application process of existing pin shear devices, they may be affected by vibration, resulting in changes in the force on the pin, which may affect measurement accuracy and stability. This may lead to inaccurate or unstable shear forces. In addition, when testing a pin with an existing pin shear device, the pin is inserted into the hole of the shear device, and it is difficult to ensure that the position of the notch of the pin remains unchanged. Therefore, the structure of existing pin shear devices still needs to be optimized. Utility Model Content

[0004] In view of this, this application proposes a pin shear device for testing to solve the above problems.

[0005] According to one aspect of this application, there is provided a pin shear device for testing, including: a fixture structure, a press, a shear block, and a workpiece;

[0006] The press has a workbench and an upper pressure head, and a positioning post is provided on the upper pressure head;

[0007] The fixture structure is placed on the workbench, and a receiving groove is provided in the middle of the fixture structure, and the shear block is inserted into the receiving groove;

[0008] The shear block is provided with a positioning hole along the force application direction of the press, and the positioning hole corresponds to the positioning post; the shear block is sleeved on the positioning post through the positioning hole;

[0009] An upper placement groove is provided on the fixture structure, the opening direction of the placement groove is perpendicular to the force application direction of the press, and the cross-section of the placement groove is in a U-shaped structure; a corresponding limiting portion is provided at the lower part of the shear block, and the limiting portion is in a U-shaped structure, and the placement groove and the limiting portion form a working cavity for inserting the workpiece.

[0010] In a possible implementation, the fixture structure is placed in the middle of the workbench, the placement groove is provided in the middle of the fixture structure, the limiting portion is provided in the middle of the shear block, and the workpiece is located in the middle of the upper pressure head.

[0011] In a possible implementation, the number of the positioning holes is more than two. The positioning holes are arranged at intervals in the force application direction of the press, and the distance between two adjacent positioning holes is equal.

[0012] In a possible implementation, the number of the positioning holes is two. The two positioning holes are symmetrically arranged at both ends of the shearing block, and the line connecting the two positioning holes forms an angle with the midline of the fixture.

[0013] In a possible implementation, the workpiece includes: a bushing and a clamping portion;

[0014] The bushing has a hollow structure. The size of the bushing matches the size of the limiting portion. A through hole is provided in the middle of the bushing. The size of the through hole matches the size of the clamping portion. The clamping portion is inserted into the through hole.

[0015] The clamping portion has a hollow structure. A pre-installation hole is provided in the middle of the clamping portion. The size of the pin matches the size of the pre-installation hole. The pin is inserted into the clamping portion through the pre-installation hole.

[0016] In a possible implementation, the fixture structure includes: a front fixture, a rear fixture and a spacer block;

[0017] The spacer block is arranged between the front fixture and the rear fixture. The height of the front fixture is the same as the height of the rear fixture, and the height of the spacer block is less than the height of the bottom end of the placement groove;

[0018] The front fixture is connected to the spacer block and the rear fixture in sequence through bolts.

[0019] In a possible implementation, the notch of the pin is located inside the bushing, and the notch of the pin is arranged upward; one end of the clamping portion is provided with the pin. The size of the pin matches the size of the through hole. The pin is inserted into the through hole. A long hole is provided in the side wall of the pin. The long hole is communicated with the pre-installation hole, and the orifice of the long hole is arranged upward.

[0020] In a possible implementation, there are two clamping portions. The two clamping portions are oppositely arranged at both ends of the through hole of the bushing.

[0021] In a possible implementation, the front fixture and the rear fixture are detachably connected; the width of the shearing block matches the set width of the accommodating groove; the outer peripheries of the front fixture and the rear fixture are flush; both the front fixture and the rear fixture are in the shape of a cuboid structure.

[0022] In a possible implementation, the size of the placement groove is equal to the size of the limiting portion, the inner circumference of the placement groove matches the outer circumference of the workpiece, and the inner circumference of the limiting portion matches the outer circumference of the workpiece.

[0023] Advantages of the present application:

[0024] The pin shearing device for experiments proposed by the present application has a simple structure, and the data of the shearing strength of the obtained pins is more accurate and more representative. By providing a positioning hole on the shearing block along the force application direction of the press, the position of the shearing block is fixed, thereby defining the force application position of the workpiece, so that the pressure applied by the upper pressing head to the workpiece is always uniform. Since the fixture structure is placed on the workbench of the press and the shearing block is arranged in the accommodating groove of the fixture structure, therefore, by providing the positioning hole, the position of the entire fixture structure is restricted. During the detection process of the press, neither the shearing block nor the fixture structure is likely to move. This makes the measured shearing strength of the pin more representative.

[0025] Other features and aspects of the present application will become clear from the following detailed description of the exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings included in and constituting a part of this specification, together with the specification, illustrate exemplary embodiments, features, and aspects of the present application and are used to explain the principles of the present application.

[0027] Figure 1 The main structure diagram of the pin shearing device for experiments showing an embodiment of the present application;

[0028] Figure 2 The schematic diagram of the pin shearing device for experiments showing an embodiment of the present application;

[0029] Figure 3 The schematic structure diagram of the workpiece showing an embodiment of the present application;

[0030] Figure 4 The schematic diagram of the workpiece showing an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0032] Among them, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application or simplifying the description, rather than indicating or implying 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 construed as a limitation to the present application.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.

[0034] The special term "exemplary" herein means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior to or better than other embodiments.

[0035] In addition, for better illustration of the present application, numerous specific details are given in the following specific implementation manners. Those skilled in the art should understand that the present application can also be implemented without some specific details. In some instances, methods, means, elements, and circuits well-known to those skilled in the art are not described in detail to highlight the gist of the present application.

[0036] As Figure 1 and Figure 2 shown, according to one aspect of the present application, a pin shearing device for experiments is provided, including: a fixture structure, a press, a shearing block 200, and a workpiece 300; the press has a workbench and an upper punch, and a positioning post is arranged on the upper punch; the fixture structure is placed on the workbench, and a receiving groove is arranged in the middle of the fixture structure, and the shearing block 200 is inserted into the receiving groove; a positioning hole 210 is formed in the shearing block 200 along the force application direction of the press, and the positioning hole 210 corresponds to the positioning post; the shearing block 200 is sleeved on the positioning post through the positioning hole 210; a placement groove 110 is arranged at the upper part of the fixture structure, the opening direction of the placement groove 110 is perpendicular to the force application direction of the press, and the cross-section of the placement groove 110 is in a U-shaped structure; a limiting part 220 is correspondingly arranged at the lower part of the shearing block 200, and the limiting part 220 is in a U-shaped structure, and the placement groove 110 and the limiting part 220 form a working cavity, and the workpiece 300 is inserted; the workpiece 300 is sleeved with a pin.

[0037] The pin shearing device proposed in this application has a simple structure, and the data of the shearing strength of the pins obtained is more accurate and representative. By providing positioning holes 210 along the force application direction of the press on the shearing block 200 to fix the position of the shearing block 200, the force application position of the workpiece 300 is thus defined, so that the pressure applied by the upper punch to the workpiece 300 is always uniform. Since the fixture structure is placed on the workbench of the press and the shearing block 200 is arranged in the accommodating groove of the fixture structure, therefore, by providing the positioning holes 210, the position of the entire fixture structure is restricted. During the detection process of the press, neither the shearing block 200 nor the fixture structure is likely to move. This makes the measured shearing strength of the pins more representative. And the positioning holes 210 are used for positioning on the press, and in addition, it is convenient for disassembly when being clamped downwards. It should also be noted that the material of the pin is an elastic material, and the notch of the pin is arranged directly below the shearing block 200.

[0038] It should also be noted that this test pin shearing device is not only for the detection of split pins. It can also be used to test the shearing force of solid cylindrical pins at the same time.

[0039] In a possible implementation, the fixture structure is placed in the middle of the workbench, the placement groove 110 is arranged in the middle of the fixture structure, the limiting part 220 is arranged in the middle of the shearing block 200, and the workpiece 300 is located in the middle of the upper punch. In this embodiment, it should be noted that the force on the pins on the fixture structure is made uniform, and the obtained shearing strength data is more representative.

[0040] In a possible implementation, the number of the positioning holes 210 is more than two, the positioning holes 210 are arranged at intervals along the force application direction of the press, and the distance between two adjacent positioning holes 210 is equal. In this embodiment, it should be noted that by providing multiple positioning holes 210, since the shearing block 200 and the fixture structure clamp and fix the workpiece 300, and then the position of the shearing block 200 is fixed by the positioning posts, the position of the workpiece 300 is better fixed.

[0041] In a possible implementation, the number of the positioning holes 210 is two, the two positioning holes 210 are symmetrically arranged at both ends of the shearing block 200, and the line connecting the two positioning holes 210 has an included angle with the center line of the fixture. In this embodiment, it should be noted that the two positioning holes 210 are arranged on the left and right sides of the limiting part 220, which is convenient for fixing the position of the pin.

[0042] Such as Figure 3 and Figure 4As shown, in a possible implementation, the workpiece 300 includes: a bushing 310 and a clamping portion 320; the bushing 310 has a hollow structure, and the size of the bushing 310 matches the size of the limiting portion 220. A through hole 311 is provided in the middle of the bushing 310, and the size of the through hole 311 matches the size of the clamping portion 320. The clamping portion 320 is inserted into the through hole 311; the clamping portion 320 has a hollow structure, and a pre-installation hole is provided in the middle of the clamping portion 320. The pin matches the size of the pre-installation hole, and the pin is inserted into the clamping portion 320 through the pre-installation hole, and the notch of the pin is located within the bushing 310. In this embodiment, it should be noted that by placing the pin within the bushing 310, the position of the pin is not easily altered, and the obtained shear strength data is more accurate. It should also be noted that for the through hole 311 formed by the workpiece 300 composed of the bushing 310 and the clamping portion 320 and the pin 321, there are various size options. The size detection of pins of various different sizes can be achieved by replacing the bushing 310 and the clamping portion 320. The bushing 310 and the clamping portion 320 can be freely replaced. One set of shear devices can be used in conjunction with different bushings 310 and clamping portions 320 to perform the detection of multiple pins 321. Further, it should be noted that the bushing 310 and the clamping portion 320 are made of hard alloy steel, with a hardness reaching above 700HV and being not easily damaged.

[0043] In a possible implementation, the fixture structure includes: a front fixture 120, a rear fixture 130, and a spacer block; the spacer block is disposed between the front fixture 120 and the rear fixture 130. The height of the front fixture 120 is the same as the height of the rear fixture 130, and the height of the spacer block is less than the height of the bottom end of the placement groove 110; the front fixture 120 is connected to the spacer block and the rear fixture 130 in sequence through bolts. In this embodiment, it should be noted that the spacer block is provided with an opening corresponding to the positioning hole 210 to facilitate further fixing of the fixture structure.

[0044] In a possible implementation, the notch of the pin is located within the bushing, and the notch of the pin is arranged upward; one end of the clamping portion 320 is provided with a pin 321, and the pin 321 matches the size of the through hole 311, and the pin 321 is inserted into the through hole 311; a long hole 10 is formed in the side wall of the pin 321, and the long hole 10 communicates with the pre-installation hole, and the orifice of the long hole 10 faces upward. In this embodiment, it should be noted that the clamping portion is detachably connected to the bushing through the pin, and the set length of the bushing matches the set width of the accommodation groove, which is convenient for those skilled in the art to observe the change of the notch of the pin after the press applies pressure, and the measured data of the shear strength of the split pin is more accurate.

[0045] In a possible implementation, there are two clamping parts 320, and the two clamping parts 320 are oppositely arranged at both ends of the through hole 311 of the bushing 310. In this embodiment, it should be noted that it is convenient to test multiple short pins and improve the detection efficiency. The bushing 310 is a hardened bushing 310, and the clamping part 320 is made of an elastic material. The bushing 310 has a cylindrical structure. The pin 321 has a cylindrical structure, and the pin 321 is arranged in the middle of one end of the bushing 310. The clamping part 320 as a whole has a convex structure. The radius of the bushing 310 is greater than the radius of the clamping part 320.

[0046] In a possible implementation, the front fixture 120 and the rear fixture 130 are detachably connected; the width of the shear block 200 matches the set width of the receiving groove; the outer peripheries of the front fixture 120 and the rear fixture 130 are flush; both the front fixture 120 and the rear fixture 130 have a cuboid structure. In this embodiment, it should be noted that circular holes are correspondingly arranged in the upper middle parts of the front fixture 120 and the rear fixture 130. The number of circular holes is two, and they are oppositely arranged on both sides of the U-shaped placement groove 110. And the first bolt 410 connects the front fixture 120 and the rear fixture 130 through the circular holes. Openings are correspondingly arranged in the lower parts of the front fixture 120, the cushion block and the rear fixture 130. The number of openings is multiple, and the multiple openings are arranged at the bottom of the U-shaped placement groove 110. And the second bolt 420 connects the front fixture 120, the cushion block and the rear fixture 130 through the openings. The number of openings is five, and the five openings are equally spaced at the bottom. The fixture structure of the present application is convenient for disassembly. After long-term use, it is convenient to replace worn components and reduce production costs.

[0047] In a possible implementation, the size of the placement groove 110 is equal to the size of the limiting part 220, and the inner periphery of the placement groove 110 matches the outer periphery of the workpiece 300, and the inner periphery of the limiting part 220 matches the outer periphery of the workpiece 300. In this embodiment, it should be noted that the placement groove 110 and the limiting part 220 can better clamp and fix the workpiece 300, making the notch of the pin face upward. It should also be noted that the placement groove 110 and the limiting part 220 form a cylindrical working cavity, which fits the outer periphery of the pin to be detected, making the installation of the pin on the fixture structure more stable and the measurement data more accurate. It should also be noted that the set width of the receiving groove is the distance between the front fixture and the rear fixture, and the length of the shear block is consistent with the length direction of the front fixture.

[0048] It should be noted that although the pin shearing device for experiments is introduced above by taking the present application as an example, those skilled in the art can understand that the present application should not be limited to this. In fact, users can flexibly set parameters according to personal preferences and / or actual application scenarios as long as it is reasonable.

[0049] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technologies in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A pin shearing device for experiments, applicable to detecting pins, characterized in that, Including: A fixture structure, a press, a shear block and a workpiece; The press has a workbench and an upper punch, and positioning columns are arranged on the upper punch; The fixture structure is placed on the workbench, a receiving groove is arranged in the middle of the fixture structure, and the shear block is inserted into the receiving groove; The shear block is provided with positioning holes along the force application direction of the press, and the positioning holes correspond to the positioning columns; the shear block is sleeved on the positioning columns through the positioning holes; An upper part of the fixture structure is provided with a placement groove, the opening direction of the placement groove is perpendicular to the force application direction of the press, and the cross section of the placement groove is in a U-shaped structure; a limiting part is correspondingly arranged at a lower part of the shear block, and the limiting part is in a U-shaped structure, and a working cavity is formed by the placement groove and the limiting part to insert the workpiece.

2. The pin shearing device for testing according to claim 1, wherein, The fixture structure is placed in the middle of the workbench, the placement groove is arranged in the middle of the fixture structure, the limiting part is arranged in the middle of the shear block, and the workpiece is located in the middle of the upper punch.

3. The pin shearing device for experiments according to claim 1, characterized in that, The number of the positioning holes is more than two, the positioning holes are arranged at intervals along the force application direction of the press, and the distance between adjacent two positioning holes is equal.

4. The pin shearing device for experiments according to claim 1, characterized in that, The number of the positioning holes is two, the two positioning holes are symmetrically arranged at two ends of the shear block, and the connection line between the two positioning holes has an included angle with the middle line of the fixture.

5. The pin shearing device for experiments according to any one of claims 1-4, characterized in that, The workpiece includes: a bushing and a clamping part; The bushing is in a hollow structure, the size of the bushing matches the size of the limiting part, a through hole is arranged in the middle of the bushing, the size of the through hole matches the size of the clamping part, and the clamping part is inserted into the through hole; The clamping part is in a hollow structure, a pre-installation hole is arranged in the middle of the clamping part, the size of the pin matches the size of the pre-installation hole, and the pin is inserted into the clamping part through the pre-installation hole.

6. The pin shearing device for testing according to claim 5, characterized in that, The fixture structure includes: a front fixture, a rear fixture and a cushion block; The cushion block is arranged between the front fixture and the rear fixture, the height of the front fixture is the same as the height of the rear fixture, and the height of the cushion block is less than the height of the bottom end of the placement groove; The front fixture is connected to the cushion block and the rear fixture in sequence through bolts.

7. The pin shearing device for testing according to claim 5, characterized in that, The notch of the pin is located in the bushing, and the notch of the pin is arranged upward; one end of the clamping part is provided with the pin, the size of the pin matches the size of the through hole, and the pin is inserted into the through hole; a long hole is arranged on the side wall of the pin, the long hole is communicated with the pre-installation hole, and the orifice of the long hole is arranged upward.

8. The pin shearing device for testing according to claim 5, characterized in that, There are two clamping parts, and the two clamping parts are oppositely arranged at two ends of the through hole of the bushing.

9. The pin shearing device for testing according to claim 6, characterized in that, The front fixture and the rear fixture are detachably connected; the width of the shear block matches the set width of the receiving groove; the outer peripheries of the front fixture and the rear fixture are flush; the front fixture and the rear fixture are both in a cuboid structure.

10. The pin shearing device for testing according to claim 9, characterized in that, The size of the placement groove is equal to the size of the limiting part, the inner periphery of the placement groove matches the outer periphery of the workpiece, and the inner periphery of the limiting part matches the outer periphery of the workpiece.

Images