Reinforcing steel bar tensile test device

Abstract

The utility model belongs to the technical field of steel performance testing, and provides a reinforcing steel bar tensile test device which comprises a workbench, a top plate, a tension-compression plate and a pair of clamping pieces, the top plate is arranged right above the workbench, and a supporting rod is vertically arranged between the top plate and the workbench; the pulling and pressing plate is transversely arranged between the workbench and the top plate so that a stretching space can be formed between the pulling and pressing plate and the workbench, and the end of the pulling and pressing plate is arranged outside the supporting rod in a sleeving mode so that the pulling and pressing plate can be driven by external force to move in the axial direction of the supporting rod. The pair of clamping pieces is symmetrically arranged on the left side and the right side in the stretching space and located in the middle. According to the utility model, the distance between the two clamping pieces can be adjusted, so that tensile tests can be carried out on steel bars with different lengths and steel bars with different diameters, the application range is wide, the use is more flexible, the requirements of different users can be met, and the utilization rate of the steel bar tensile test device is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel performance testing, and in particular relates to a steel bar tensile testing device. Background Art

[0002] Rebar is a type of steel commonly used in the construction field. Whether its strength meets the standard directly affects the production qualification rate. Therefore, the first batch of rebars produced are usually subjected to tensile tests to test their performance. Through tensile tests, the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield strength and other data of the rebar can be obtained, so as to accurately judge whether the rebar production and processing are qualified.

[0003] At present, the application scope of existing testing devices for steel bar tensioning is relatively limited. They can only perform tensile tests on steel bars within a fixed length, resulting in low utilization rate, inflexible use, and inability to meet the needs of different users.

[0004] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the problem that the steel bar tensile testing device in the prior art can only perform tensile testing on steel bars within a fixed length, and to provide a steel bar tensile testing device.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A steel bar tensile testing device comprises: a workbench, a top plate, a tension and pressure plate and a pair of clamping members, the top plate is arranged just above the workbench, a support rod is vertically arranged between the top plate and the workbench; the tension and pressure plate is horizontally placed between the workbench and the top plate to form a tensile space between the tension and pressure plate and the workbench, the end of the tension and pressure plate is sleeved on the outside of the support rod so that the tension and pressure plate is driven by external force to move along the axial direction of the support rod; a pair of the clamping members are symmetrically arranged on the left and right sides of the interior of the tensile space and centered, the clamping members The holding member is composed of a pair of splints connected laterally, and wing plates are extended outward at the top and bottom of the splints, and a hinge shaft is inserted at one end of the wing plate along the width direction of the tension and pressure plate. Tensioning arms are rotatably provided at both ends of the hinge shaft, and one end of the tensioning arm is sleeved on the outside of the hinge shaft, and the other end of the tensioning arm is hinged to the corresponding lower plate surface of the tension and pressure plate or the upper table surface of the workbench and centered, and a fastener is installed at the other end of the wing plate; the two clamping members are synchronously moved in opposite directions by the axial displacement of the tension and pressure plate along the support rod.

[0008] In the steel bar tensile testing device as described above, preferably, lifting columns are provided at the four corners of the lower surface of the workbench.

[0009] Preferably, a plurality of support rods are provided, and the plurality of support rods are distributed at the angles of the workbench, so that a space for the passage of steel bars is reserved between two adjacent support rods.

[0010] Preferably, an oil cylinder is provided between the top plate and the tension and pressure plate;

[0011] The cylinder body of the oil cylinder is fixed to the middle part of the lower plate surface of the top plate, and the cylinder rod head end of the oil cylinder is fixed to the middle part of the upper plate surface of the tension and pressure plate.

[0012] Preferably, the length of the hinge shaft is greater than the thickness of two adjacent wing panels after being abutted, so that the distance between the two adjacent wing panels can be adjusted.

[0013] Preferably, the fastener is a bolt;

[0014] The length of the rod of the bolt is not less than the length of the hinge shaft.

[0015] Preferably, the end of the hinge shaft is upset to limit the tensioning arm.

[0016] Beneficial effects: The utility model can realize tensile tests on steel bars of different lengths by adjusting the distance between the two clamping parts, and can also perform tensile tests on steel bars of different diameters. It has a wide range of applications and is more flexible to use. It can meet the needs of different users, thereby greatly improving the utilization rate of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention.

[0018] Figure 1 This is a schematic diagram of the main view of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 3 It is an overall schematic diagram of the clamping structure of the utility model.

[0021] In the figure: 1. Workbench; 2. Top plate; 3. Support rod; 4. Tension and pressure plate; 5. Clamp; 6. Wing plate; 7. Articulated shaft; 8. Tensioning arm; 9. Lifting column; 10. Cylinder; 11. Fasteners. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0023] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0025] Embodiment: This embodiment aims to provide a steel bar tensile testing device, the main function of which is that it can perform tensile tests on steel bars of different lengths and different diameters.

[0026] Reference Figure 1 and Figure 2 The top plate 2 is provided with four support rods 3 and four support rods 3 arranged at the bottom of the workbench 1, so that space for steel bars to pass through is reserved between the two adjacent support rods 3. The tension and pressure plate 4 is placed horizontally between the workbench 1 and the top plate 2 to form an expandable and retractable stretching space between the tension and pressure plate 4 and the workbench 1. The left and right ends of the tension and pressure plate 4 are correspondingly sleeved on the outside of the support rod 3 so that the tension and pressure plate 4 is driven by external force to move along the axial direction of the support rod 3. The external force is provided by the oil cylinder 10, which is fixed between the top plate 2 and the tension and pressure plate 4. The cylinder body of the oil cylinder 10 is fixed to the middle part of the lower plate surface of the top plate 2, and the cylinder rod head end of the oil cylinder 10 is fixed to the middle part of the upper plate surface of the tension and pressure plate 4.

[0027] Reference Figure 2 and Figure 3, the two clamping members are symmetrically arranged on the left and right sides of the stretching space and centered. The clamping members are composed of a pair of plywood 5 butted in the transverse direction, that is, the plywood 5 is vertical, and the plywood 5 is in the shape of an arc. When the two plywood 5 are completely butted together, a circular tube will be formed. The purpose is to adapt to the contour of the steel bar. The top and bottom of the plywood 5, that is, the upper and lower ends of the plywood 5 are both extended outward with wing plates 6. The end of the wing plate 6 facing the center of the stretching space is interspersed with a hinge shaft 7 along the width direction of the tension and pressure plate 4. Both ends of the hinge shaft 7 are rotatably provided with a tensioning arm 8, and the hinge The end of the shaft 7 is upset to limit the tensioning arm 8. There are eight tensioning arms 8 in total. Specifically, one end of the tensioning arm 8 is sleeved on the outside of the hinge shaft 7, and the other end of the tensioning arm 8 is hinged to the lower plate surface of the corresponding tension and pressure plate 4 or the upper plate surface of the workbench 1 and is centered. The tension and pressure plate 4 is driven by the oil cylinder 10 to move along the axial direction of the support rod 3, that is, the up and down displacement to achieve synchronous reverse movement of the two clamping parts. The two clamping parts are synchronously moved in reverse to adapt to steel bars of different lengths. The other end of the wing plate 6 is installed with a fastener 11, and the steel bar is clamped and fixed by adjusting the fastener 11.

[0028] In this embodiment, the length of the hinge shaft 7 is greater than the thickness of two adjacent wing plates 6 after being attached, so that the distance between the two adjacent wing plates 6 can be adjusted. This is for the purpose of clamping and fixing steel bars of different diameters.

[0029] In this embodiment, the fastener 11 is a bolt, and the length of the bolt rod is not less than the length of the hinge shaft 7. This setting is to ensure that the use of the bolt will not change with the change of the spacing between the two wing plates 6, thereby ensuring the tightening effect of the bolt. If necessary, a rubber layer can be provided on the clamping surface of the splint to enhance the tightening effect.

[0030] In actual use, first adjust the distance between the two clamps according to the length of the steel bar, adjust the distance between the two adjacent clamps 5 according to the diameter of the steel bar, and then pass the front end of the steel bar to be tensile tested through the space formed between the two clamps 5, then tighten the clamps, fix the end of the steel bar through the clamps, and finally apply pressure to the tension and compression plate 4 through the cylinder 10 to realize the tensile test of the steel bar.

[0031] This embodiment can perform tensile tests on steel bars of different lengths while also performing tensile tests on steel bars of different diameters by adjusting the spacing between the two clamping members. It has a wide range of applications and is more flexible to use, and can meet the needs of different users, thereby significantly improving utilization.

[0032] It will be understood that the above description is merely exemplary and the embodiments of the present application do not limit this.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A steel bar tensile testing device, characterized in that: include: Workbench; A top plate is provided directly above the workbench, with a support rod provided between the top plate and the workbench; A tension and pressure plate is placed horizontally between the workbench and the top plate to form a tensioning space between the tension and pressure plate and the workbench, and an end portion of the tension and pressure plate is sleeved on the outside of the support rod so that the tension and pressure plate can be driven by an external force to move along the axial direction of the support rod; A pair of clamping members are symmetrically arranged on the left and right sides of the stretching space and centered therein, the clamping members being composed of a pair of clamping plates butted in the transverse direction, the top and bottom of the clamping plates both having wing plates extending outward, one end of the wing plate being inserted with a hinge shaft along the width direction of the tension and pressure plate, both ends of the hinge shaft being rotatably provided with a tensioning arm, one end of the tensioning arm being sleeved on the outside of the hinge shaft, the other end of the tensioning arm being hinged to the corresponding lower plate surface of the tension and pressure plate or the upper table surface of the workbench and centered, and the other end of the wing plate being installed with a fastener; The two clamping members are synchronously moved in opposite directions by the axial displacement of the tension and pressure plate along the support rod.

2. The steel bar tensile testing device according to claim 1, characterized in that: The four corners of the lower surface of the workbench are all provided with lifting columns.

3. The steel bar tensile testing device according to claim 1, characterized in that: There are multiple support rods, and the multiple support rods are distributed at the angle of the workbench, so that a space for steel bars to pass through is reserved between two adjacent support rods.

4. The steel bar tensile testing device according to claim 1, characterized in that: An oil cylinder is provided between the top plate and the tension and pressure plate; The cylinder body of the oil cylinder is fixed to the middle part of the lower plate surface of the top plate, and the cylinder rod head end of the oil cylinder is fixed to the middle part of the upper plate surface of the tension and pressure plate.

5. The steel bar tensile testing device according to claim 1, characterized in that: The length of the hinge shaft is greater than the thickness of two adjacent wing plates after being abutted, so that the distance between the two adjacent wing plates can be adjusted.

6. The steel bar tensile testing device according to claim 5, characterized in that: The fastener is a bolt; The length of the rod of the bolt is not less than the length of the hinge shaft.

7. The steel bar tensile testing device according to claim 1, characterized in that: The end of the hinge shaft is upset to limit the tensioning arm.

Images