A steel material tensile testing apparatus

Abstract

The utility model provides a kind of steel tensile testing equipment, including base, the lower clamp seat for clamping steel is installed in the middle position of base upper surface, the upper clamp seat is equipped with in the upper of lower clamp seat, the lifting plate for being installed on the movable end of hydraulic cylinder is installed in the upper clamp seat top by bolt, one side of lower clamp seat and one side of upper clamp seat are equipped with pressing plate, the side of lower clamp seat away from pressing plate and the side of upper clamp seat away from pressing plate are equipped with locating frame, the plug-in block is inserted in the locating frame, multiple screw holes are opened in the side of plug-in block, multiple first perforations are opened in the side of pressing plate, the channel formed by first perforation and second perforation inserts screw, the screw is threadedly connected in screw hole in one end, the utility model has the beneficial effects that: it is unnecessary to directly process screw hole on clamp seat, and the component of processing screw hole and clamp seat form the plug-in relationship.

Description

Technical Field

[0001] This utility model is a steel tensile testing device, belonging to the field of steel tensile testing. Background Technology

[0002] Tensile testing of steel is an important test method that applies axial tension to steel specimens using a tensile testing machine, causing deformation until fracture, thereby accurately determining key mechanical properties such as yield strength, tensile strength, and elongation. In the testing process, after the steel specimen is prepared, it needs to be fixed at both ends using a clamping structure formed by a clamp and a pressure plate. The pressure plate is tightly connected to the clamp by multiple screws, forming a stable load-bearing frame. It is worth noting that the screw holes for the screws are directly machined into the surface of the clamp. While this design facilitates initial installation, it has a significant drawback: because tensile testing requires frequent disassembly and reassembly of the connecting screws between the pressure plate and the clamp (e.g., every time the specimen is changed), the screw holes are prone to stripping, wear, or thread deformation under repeated thread engagement and mechanical stress. Once the screw holes are damaged, the connection between the pressure plate and the clamp will loosen, affecting the specimen clamping accuracy and even causing deviations in test data or equipment malfunction. To restore the reliability of the testing device, the entire clamp must be replaced later, which not only increases equipment maintenance costs but may also delay the testing progress and reduce testing efficiency due to downtime for component replacement. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a steel tensile testing device to solve the problems mentioned in the background technology. This utility model does not require direct machining of screw holes on the clamp, so that the component with the machined screw hole forms an insertion relationship with the clamp.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a steel tensile testing device includes a base. A lower clamp for holding steel is installed at the center of the upper surface of the base. An upper clamp is located directly above the lower clamp. A lifting plate for mounting on the movable end of a hydraulic cylinder is bolted to the top of the upper clamp. Two symmetrically arranged guide columns are installed on the upper surface of the base. The upper ends of the guide columns penetrate the lifting plate and slide in contact with it. Both the lower and upper clamps are L-shaped structures. A pressure plate is provided on one side of the lower clamp and one side of the upper clamp. A positioning frame is installed on the side of the lower clamp away from the pressure plate and the side of the upper clamp away from the pressure plate. An insert is inserted into the positioning frame. One side of the insert has multiple screw holes. One side of the pressure plate has multiple first through holes. One side of the lower clamp and one side of the upper clamp have multiple second through holes. A screw is inserted into the channel formed by the first and second through holes, and one end of the screw is threaded into the screw hole.

[0005] Furthermore, two symmetrically arranged support plates are installed on the side of the lower clamp facing the positioning frame and the side of the upper clamp facing the positioning frame. The positioning frame is connected and fixed to the support plates. A pad is installed in the middle of one side of the insertion block. The pads on the two insertion blocks are in contact with the upper clamp and the lower clamp, respectively.

[0006] Furthermore, the positioning frame has a rectangular cross-section, and the insert block has a rectangular cross-section.

[0007] Furthermore, the insert has two elongated openings on one side, and the two elongated openings are symmetrically arranged about the pad strip.

[0008] Furthermore, handles are installed on both parallel sides of the lifting plate. The handles are U-shaped and the two handles are arranged diagonally.

[0009] Furthermore, vertical holes are provided at both ends of the lifting plate, and guide sleeves are installed in the vertical holes, which are fitted onto the guide columns.

[0010] Furthermore, one side of the clamping plate is uniformly machined with a plurality of first anti-slip strips, and the side of the upper clamping seat facing the clamping plate and the side of the lower clamping seat facing the clamping plate are both machined with a plurality of uniformly arranged second anti-slip strips.

[0011] Furthermore, a connecting seat is installed on the upper surface of the base, and the lower clamp is installed on the upper surface of the connecting seat by bolts.

[0012] The beneficial effects of this utility model are: 1. The screw holes are concentrated in the detachable insert block, rather than being directly machined on the upper and lower clamps. When the screw holes wear due to frequent disassembly and assembly, it is only necessary to loosen the screws, remove the insert block, and replace it with a new one, which saves costs compared to replacing the entire clamp in the traditional way.

[0013] 2. Use the support plate to connect the upper clamp, lower clamp and corresponding positioning frame. Then, after the insert block is inserted into the positioning frame, the pads on the two insert blocks contact the upper clamp and lower clamp respectively. Therefore, after the screw is installed, part of the screw is exposed. When the screw is difficult to remove due to deformation, the exposed part of the screw is cut off to facilitate the disassembly of the clamp plate, upper clamp or lower clamp. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural schematic diagram of a steel tensile testing device according to the present invention; Figure 2 This is another perspective view of the steel tensile testing equipment of this utility model; Figure 3 This is an exploded structural diagram of the insert block, positioning frame, upper clamp, and lower clamp in a steel tensile testing device according to the present invention. Figure 4 This is an exploded structural diagram of the pressure plate, upper clamp, and lower clamp in a steel tensile testing device according to this utility model; In the diagram: 1-base, 2-connecting seat, 3-lower clamp seat, 4-insertion block, 5-positioning frame, 6-guide column, 7-upper clamp seat, 8-handle, 9-lifting plate, 10-pressure plate, 11-screw, 12-support plate, 13-pad strip, 14-oblong opening, 15-screw hole, 16-second through hole, 17-first through hole. Detailed Implementation

[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0016] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a steel tensile testing device, including a base 1, a lower clamp 3 for clamping steel is installed at the middle position of the upper surface of the base 1, wherein a connecting seat 2 is installed on the upper surface of the base 1, and the lower clamp 3 is installed on the upper surface of the connecting seat 2 by bolts, and the connecting seat 2 serves to connect the lower clamp 3 and the base 1.

[0017] See Figures 1-4 Above the lower clamping seat 3 is an upper clamping seat 7. A lifting plate 9 for mounting on the movable end of a hydraulic cylinder is bolted to the top of the upper clamping seat 7. Handles 8, U-shaped in structure, are mounted on two parallel sides of the lifting plate 9, arranged diagonally. Two symmetrically arranged guide posts 6 are mounted on the upper surface of the base 1. The upper ends of the guide posts 6 penetrate the lifting plate 9 and slide in contact with it. Vertical holes are opened at both ends of the lifting plate 9, and guide sleeves are installed within these holes, fitting onto the guide posts 6. The lower clamping seat 3... Both the upper clamp 7 and the lower clamp 3 are L-shaped structures. Both sides of the lower clamp 3 and the upper clamp 7 are equipped with pressure plates 10. The lower clamp 3, the upper clamp 7 and the corresponding pressure plates 10 are used to clamp and limit the two ends of the steel sample. The hydraulic cylinder drives the lifting plate 9 to move upward, so that the steel sample is stretched, providing data for testing the tensile properties of the steel sample. Multiple first anti-slip strips are uniformly processed on one side of the pressure plate 10. Multiple evenly arranged second anti-slip strips are processed on the side of the upper clamp 7 facing the pressure plate 10 and the side of the lower clamp 3 facing the pressure plate 10.

[0018] See Figures 1-4Positioning frames 5 are installed on the side of the lower clamp 3 facing away from the pressure plate 10 and the side of the upper clamp 7 facing away from the pressure plate 10. Insert blocks 4 are inserted into the positioning frames 5. Multiple screw holes 15 are formed on one side of the insert block 4. Multiple first through holes 17 are formed on one side of the pressure plate 10. Multiple second through holes 16 are formed on one side of the lower clamp 3 and the upper clamp 7. Screws 11 are inserted into the channel formed by the first through holes 17 and the second through holes 16. One end of the screw 11 is threaded into the screw hole 15. The screw holes 15 are concentrated on the detachable insert block 4, rather than being directly machined on the upper clamp 7 and the lower clamp 3. When the screw holes 15 wear due to frequent disassembly and assembly (such as stripped threads or deformed threads), it is only necessary to loosen the screws 11, remove the insert block 4, and replace it with a new insert block 4, saving costs compared to replacing the entire clamp in the traditional way.

[0019] See Figures 1-4 The positioning frame 5 has a rectangular cross-section, and the insert block 4 has a rectangular cross-section. Two symmetrically arranged support plates 12 are installed on both the lower clamp 3 facing the positioning frame 5 and the upper clamp 7 facing the positioning frame 5. The positioning frame 5 is connected and fixed to the support plates 12. A pad 13 is installed in the middle of one side of the insert block 4. The pads 13 on the two insert blocks 4 contact the upper clamp 7 and the lower clamp 3 respectively. Two elongated openings 14 are opened on one side of the insert block 4, symmetrically arranged about the pads 13. The elongated openings 14 serve to reduce... The purpose of reducing the material consumption of the insert block 4 is to connect the upper clamp 7, the lower clamp 3 and the corresponding positioning frame 5 using the support plate 12. After the insert block 4 is inserted into the positioning frame 5, the pads 13 on the two insert blocks 4 contact the upper clamp 7 and the lower clamp 3 respectively. Therefore, after the screw 11 is installed, part of the screw 11 is exposed. When the screw 11 is difficult to remove due to deformation, the exposed part of the screw 11 is cut off to facilitate the disassembly of the pressure plate 10, the upper clamp 7 or the lower clamp 3.

[0020] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A steel tensile testing device, comprising a base (1), characterized in that: A lower clamping seat (3) for clamping steel is installed at the middle of the upper surface of the base (1). An upper clamping seat (7) is provided directly above the lower clamping seat (3). A lifting plate (9) for mounting on the movable end of a hydraulic cylinder is bolted to the top of the upper clamping seat (7). Two symmetrically arranged guide columns (6) are installed on the upper surface of the base (1). The upper end of the guide column (6) passes through the lifting plate (9) and slides in contact with the lifting plate (9). Both the lower clamping seat (3) and the upper clamping seat (7) are L-shaped structures. A pressure plate (10) is provided on one side of the lower clamping seat (3) and one side of the upper clamping seat (7). A positioning frame (5) is installed on the side of the clamp (3) away from the pressure plate (10) and the side of the upper clamp (7) away from the pressure plate (10). A plug (4) is inserted in the positioning frame (5). A plurality of screw holes (15) are opened on one side of the plug (4). A plurality of first through holes (17) are opened on one side of the pressure plate (10). A plurality of second through holes (16) are opened on one side of the lower clamp (3) and the upper clamp (7). A screw (11) is inserted in the channel formed by the first through hole (17) and the second through hole (16). One end of the screw (11) is threaded into the screw hole (15).

2. The steel tensile testing equipment according to claim 1, characterized in that: Two symmetrically arranged support plates (12) are installed on the side of the lower clamp (3) facing the positioning frame (5) and the side of the upper clamp (7) facing the positioning frame (5). The positioning frame (5) is connected and fixed to the support plates (12). A pad (13) is installed in the middle of one side of the insert (4). The pads (13) on the two inserts (4) are in contact with the upper clamp (7) and the lower clamp (3) respectively.

3. The steel tensile testing equipment according to claim 2, characterized in that: The positioning frame (5) has a rectangular cross-section, and the insert block (4) has a rectangular cross-section.

4. The steel tensile testing equipment according to claim 2, characterized in that: The insert (4) has two elongated openings (14) on one side, and the two elongated openings (14) are symmetrically arranged about the pad (13).

5. The steel tensile testing equipment according to claim 1, characterized in that: The lifting plate (9) has handles (8) installed on its two parallel sides. The handles (8) are U-shaped and the two handles (8) are arranged diagonally.

6. The steel tensile testing equipment according to claim 1, characterized in that: Both ends of the lifting plate (9) are provided with vertical holes, and guide sleeves are installed in the vertical holes. The guide sleeves are fitted onto the guide column (6).

7. The steel tensile testing equipment according to claim 1, characterized in that: The pressure plate (10) has a plurality of first anti-slip strips uniformly processed on one side, and the upper clamp (7) facing the pressure plate (10) and the lower clamp (3) facing the pressure plate (10) are both processed with a plurality of uniformly arranged second anti-slip strips.

8. The steel tensile testing equipment according to claim 1, characterized in that: A connecting seat (2) is installed on the upper surface of the base (1), and the lower clamp (3) is installed on the upper surface of the connecting seat (2) by bolts.

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