Guiding bending test equipment with angle scale

Abstract

The utility model belongs to the field of guiding bending tests, and particularly relates to guiding bending test equipment with an angle scale, which comprises a base, a pair of supporting components, the angle scale and a top core, the upper surface of the base is in a sawtooth shape and is connected with a protruding key in the X-axis direction, and the front end of the base is provided with a graduated scale. The pair of supporting assemblies are installed on the two sides of the base. Each supporting assembly comprises a movable sliding block, a cylindrical guide roller and a guide roller fixing piece. The angle scale comprises a protractor and a vertical slideway, the vertical slideway is mounted in the middle of the front end of the base, and the protractor is slidably connected with the vertical slideway; the upper end of the ejector core is connected with the hydraulic component, and the lower end of the ejector core is contacted with a sample during a test. According to the utility model, the downward pressing top core is matched with the cylindrical guide roller to rotate, the bending angle of a sample is measured in real time through the angle scale in the test process, and test parameters are accurately controlled.

Description

Technical Field

[0001] The utility model belongs to the field of guided bending tests, and particularly relates to a guided bending test device with an angle scale. Background Art

[0002] The guided bending test is an important standard for detecting the ability of metal base materials or welding processes to resist plastic deformation during bending, and is applicable to the detection and evaluation of weld defects or material surface defects. It is widely used in the detection of exposed defects in the welding area of the friction welding process between drill pipe bodies and joints, the crack detection of pipeline pipe base materials and welds, etc.

[0003] Currently, the technical status quo is that during the guided bending test, usually the two wings of the specimen are bent at an angle of 180° under load, that is, the angle formed by the specimen after the test is 0°, and then the defects on its test surface are inspected. However, for tests where the required bending angle is less than 180°, such as in the drill pipe specification API 5DP which requires that the angle formed by the specimen after the test is not greater than 40°, precise control cannot be achieved, and generally a 180° bending angle is still used, resulting in cracks due to over-testing and unable to evaluate the true bending plasticity index of the material.

[0004] Chinese Patent CN105784470A discloses a 180° bending test fixture, including a bending workbench, an upper pressure roller for loading the specimen, the bending support includes a left support and a right support, which are symmetrically distributed along the axis of the upper pressure roller, and a bending resistance balance device is provided between the left and right supports; a reverse block for supporting the specimen and rotatably connected to the upper parts of the left and right supports, and a wedge-shaped slider is provided on the reverse block, and the upper and lower planes of the wedge-shaped slider are parallel to the axis of the upper pressure roller.

[0005] This patent can only be applicable to 180° bending tests, and has certain limitations for tests at other angles, and cannot achieve precise measurement of angles. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a guided bending test device with an angle scale that can measure the angle formed by the specimen during the test in real time.

[0007] The technical solution adopted by the utility model to solve the technical problem is:

[0008] The utility model provides a guiding bending test device with an angle scale, which comprises: a base, a pair of support assemblies, an angle scale, and a top core; the upper surface of the base is serrated, and a convex key is connected along the X-axis direction on the upper surface of the base, and a scale ruler is arranged at the front end of the base; the pair of support assemblies are installed on both sides of the base, and each support assembly comprises a movable slider, a cylindrical guide roller and a guide roller fixing member. The bottom of the movable slider is serrated and meshes with the upper part of the base. Moreover, a groove is formed along the X-axis direction at the bottom of the support assembly, and together with the convex key on the upper surface of the base, a keyway structure is formed. A long screw rod is arranged along the X-axis direction at the central part of the movable slider. The long screw rod penetrates through the two support assemblies, and the long screw rod is locked with a locking nut; the cylindrical guide roller is installed on the top of the movable slider, and the guide roller fixing member is connected with the cylindrical guide roller and fixed to the movable slider; the angle scale comprises a protractor and a vertical slideway. The vertical slideway is installed at the middle part of the front end of the base, and the protractor is slidably connected with the vertical slideway; the upper end of the top core is connected with a hydraulic component, and when a test is carried out, the lower end of the top core contacts with a specimen.

[0009] Further, the guide roller fixing member comprises a fixing block, a round bar and a nut locking buckle. The hollow part is arranged at the axis center of the cylindrical guide roller. A through hole is formed in the fixing block, and the through hole is coaxial with the hollow part at the axis center of the cylindrical guide roller. The round bar passes through the through hole and the axis center of the cylindrical guide roller, and the nut locking buckle outside the through hole is fixed to the round bar.

[0010] Further, long bolts are arranged on the opposite sides of the two fixing blocks of the guide roller fixing member, and the fixing block and the movable slider of the support assembly are fixed along the X-axis direction through the long bolts.

[0011] Further, the locking nut is located on the opposite sides of the two movable sliders.

[0012] Further, the vertical cross-sections of the convex key on the upper surface of the base and the groove at the bottom of the support assembly are both trapezoidal.

[0013] Further, the protractor is marked with scales and is hollow inside.

[0014] Further, the top core is plate-shaped, and the lower end thereof is arc-shaped.

[0015] The advantages and positive effects of the utility model are as follows:

[0016] 1. By using the pressing top core and the rotation of the cylindrical guide roller, during the test, the bending angle of the specimen is measured in real time through the angle scale, and the test parameters are accurately controlled.

[0017] 2. The sawteeth where the base of the present utility model meshes with the support assembly, the keyway structure formed by the raised keys on the base and the grooves on the support assembly, and the long screw rod passing through the two support assemblies can effectively prevent the support assembly from sliding in the Y-axis direction and prevent slipping during the test.

[0018] 3. The cylindrical guide rollers in the support assembly of the present utility model reduce the friction during the test, providing sufficient conditions for dynamic measurement, and adopting a replaceable structure, which brings convenience to the replacement and maintenance of spare parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the guiding bending test equipment with an angle scale of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the cylindrical guide roller of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the fixing block of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the angle scale of the present utility model.

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 1: Base; 11: Raised key; 2: Movable slider; 3: Cylindrical guide roller; 40: Fixing block; 41: Round bar; 42: Nut locking buckle; 43: Through hole; 44: Long bolt; 5 Angle scale; 51: Protractor; 52: Vertical slideway; 53: Short bolt; 6: Top core; 7: Long screw rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and 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 utility model.

[0028] As Figures 1-4 shown, the utility model provides a guiding bending test device with an angle scale, comprising: a base 1, a pair of support assemblies, an angle scale 5, and a top core 6.

[0029] As Figure 1 shown, the upper surface of the base 1 is serrated, and a trapezoidal raised key 11 is connected along the X-axis direction on the upper surface of the base 1; the bottom of the movable slider 2 is serrated and meshes with the upper part of the base 1, and a trapezoidal groove is formed along the X-axis direction at the bottom of the support assembly, which forms a keyway structure with the raised key 11 on the upper surface of the base 1, so that the support assembly can slide and adjust its position along the keyway along the X-axis direction and prevent the support assembly from sliding along the Y-axis direction. In addition, a scale ruler is also provided at the front end (test observation side) of the base 1.

[0030] As Figures 1-3 shown, a pair of support assemblies are installed on both sides of the base 1. Each support assembly includes a movable slider 2, a cylindrical guide roller 3, and a guide roller fixing member. A long screw 7 is provided along the X-axis direction at the center of the movable slider 2 and does not affect the test in the Y-axis direction. The long screw 7 penetrates through the two support assemblies. Locking nuts are provided on the opposite sides of the two movable sliders 2, and the locking nuts lock the long screw 7 to play a role in strengthening the two support assemblies; the cylindrical guide roller 3 is installed on the top of the movable slider 2, and the guide roller fixing member is connected to the cylindrical guide roller 3 and fixed to the movable slider 2. The serrations of the base of the utility model that mesh with the support assembly, the keyway structure jointly formed by the raised key of the base and the groove of the support assembly, and the long screw penetrating through the two support assemblies can effectively prevent the support assembly from sliding along the Y-axis direction and prevent slipping during the test.

[0031] As Figures 2-3As shown in the figure, the guide roller fixing member includes a fixing block 40, a round bar 41 and a nut locking buckle 42. A through hole 43 is formed in the fixing block 40. The through hole 43 is coaxial with the hollow center of the cylindrical guide roller 3. The round bar 41 passes through the through hole 43 and the center of the cylindrical guide roller 3. The nut locking buckle 42 outside the through hole 43 is fixed to the round bar 41. The center of the cylindrical guide roller 3 is hollow and can insert the round bar 41 for fixing. The cylindrical guide roller 3 rotates around the round bar 41. The fixing block 40 is detachable and functions to fix the cylindrical guide roller 3. The through hole 43 is coaxial with the hollow center of the cylindrical guide roller 3 and can insert the round bar 41 for fixing. The round bar 41 is fixed by the nut locking buckle 42 outside the through hole 43. Hexagonal long bolts 44 are provided on the opposite sides of the two fixing blocks 40 of the guide roller fixing member. The fixing block 40 and the movable slider 2 of the support assembly are fixed along the X-axis direction by the bolts. Before the test, it should be checked whether each nut and bolt is tightened to ensure the safe progress of the test. The cylindrical guide roller in the support assembly of the present utility model reduces the friction during the test, provides sufficient conditions for dynamic measurement, and adopts a replaceable structure, which brings convenience to the replacement and maintenance of spare parts.

[0032] As Figure 4 shown, the angle scale 5 includes a protractor 51 and a vertical slideway 52. The protractor 51 is marked with scales and is hollow inside for observing the progress of the test. The vertical slideway 52 is installed in the middle of the front end of the base 1. The protractor 51 is slidably connected to the vertical slideway 52. The protractor 51 and the vertical slideway 52 are fixed by a short bolt 53. The protractor 51 can be adjusted up and down along the slideway to measure the bending angle of the specimen. The upper end of the top core 6 is connected to the hydraulic component by a stud. When the test is carried out, the lower end of the top core 6 contacts the specimen. Specifically, the top core 6 is plate-shaped and its lower end is arc-shaped. The top core 6 is replaceable. The present utility model uses the downward pressure of the top core to cooperate with the rotation of the cylindrical guide roller. During the test, the bending angle of the specimen is measured in real time through the angle scale, and the test parameters are accurately controlled.

[0033] The usage method of this equipment is as follows:

[0034] During the test, first adjust the distance between the two support assemblies to achieve central symmetry. Then check whether each nut and bolt is tightened. Next, horizontally place the specimen on the two cylindrical guide rollers 3, align the center of the specimen with the top core 6, and adjust the angle scale 5 to an appropriate position. Start the hydraulic pressure and slowly press down the top core 6 to the specimen. During the test, the cylindrical guide roller 3 rotates as the specimen bends. Continuously press down the top core 6 and observe the bending angle of the specimen through the angle scale 5 until the test requirements are met. Then stop the test and check whether there are defects or cracks on the convex surface of the specimen.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A guided bending test device with an angle scale, characterized in that: include: A base (1), wherein the upper surface of the base (1) is serrated, and a raised key (11) is connected to the upper surface of the base (1) along the X-axis direction, and a scale is provided at the front end of the base (1); A pair of support components, the pair of support components are mounted on both sides of a base (1), each support component comprises a movable slider (2), a cylindrical guide roller (3) and a guide roller fixing part, the bottom of the movable slider (2) is serrated and meshes with the upper part of the base (1), and a groove is provided at the bottom of the support component along the X-axis direction, forming a keyway structure with a raised key (11) on the upper surface of the base (1), and a long screw (7) is provided at the center of the movable slider (2) along the X-axis direction, the long screw (7) passes through the two support components, and the long screw (7) is locked with a locking nut; the cylindrical guide roller (3) is mounted on the top of the movable slider (2), and the guide roller fixing part is connected to the cylindrical guide roller (3) and fixed to the movable slider (2); An angle scale (5), the angle scale (5) comprising a protractor (51) and a vertical slide (52), the vertical slide (52) being mounted at the middle of the front end of the base (1), the protractor (51) being slidably connected to the vertical slide (52); A top core (6), the upper end of which is connected to a hydraulic component, and the lower end of which is in contact with a sample when a test is performed.

2. The guided bending test equipment with an angle scale according to claim 1, characterized in that: The guide roller fixing member comprises a fixing block (40), a round rod (41) and a nut locking buckle (42); the axis of the cylindrical guide roller (3) is hollow; a through hole (43) is formed on the fixing block (40); the through hole (43) is coaxial with the hollow axis of the cylindrical guide roller (3); the round rod (41) passes through the through hole (43) and the axis of the cylindrical guide roller (3); and the nut locking buckle (42) outside the through hole (43) is fixed to the round rod (41).

3. The guided bending test equipment with an angle scale according to claim 2, characterized in that: Long bolts (44) are provided on opposite sides of the two fixing blocks (40) of the guide roller fixing member, and the fixing blocks (40) and the movable slider (2) of the support assembly are fixed along the X-axis direction by the long bolts (44).

4. The guided bending test equipment with an angle scale according to claim 3, characterized in that: The locking nut is located on opposite sides of the two movable slide blocks (2).

5. The guided bending test equipment with an angle scale according to claim 4, characterized in that: The raised key (11) on the upper surface of the base (1) and the groove at the bottom of the support assembly are both trapezoidal in vertical cross-section.

6. The guided bending test equipment with an angle scale according to claim 5, characterized in that: The protractor (51) is marked with scales and is hollow inside.

7. The guided bending test equipment with an angle scale according to claim 6, characterized in that: The top core (6) is plate-shaped, and its lower end is arc-shaped.

8. The guided bending test device with an angle scale according to claim 7, characterized in that: The upper end of the top core (6) is connected to the hydraulic component by a stud.

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