Special tool clamp device for full-automatic metal plate tensile sample

Abstract

The utility model discloses a full-automatic special work fixture device for a metal plate tensile sample, which relates to the technical field of material detection, and adopts the scheme that two wedge blocks are downwards extruded by a hydraulic rod to move downwards and simultaneously do opposite clamping movement, and meanwhile, the bottom end of the hydraulic rod downwards extrudes two force arm blocks through a pressing column, so that the two force arm blocks are tightly clamped. The two force arm blocks are deflected by taking the rotating pin as the axis and drive the boundary rod at the bottom end to clamp the surface of the sample, and the two wedge blocks are close to each other while the wedge blocks move downwards, so that the pressure applying surfaces of the wedge blocks further extrude the boundary rod until the wedge blocks are attached to the surface of the sample, and the boundary rod is located below the wedge blocks; a uniform linear stress surface is formed and is matched with the clamping surfaces of the two wedge blocks to be attached and fixed, so that the clamping force is high, meanwhile, the situation that the clamping surfaces are abraded to cause non-uniform stress on the clamping contact surfaces during perennial use can be avoided, the clamping effect is greatly improved, and the service life is prolonged. And the detection effect is not influenced along with the increase of the service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of material detection, and specifically relates to a special tooling fixture device for a full-automatic metal plate tensile test specimen. Background Art

[0002] As one of the commonly used materials in engineering structures, metal sheets are widely used in aerospace, automobile manufacturing, building structures and other fields. However, in actual engineering applications, metal sheets may encounter various external loads and environmental conditions, which may cause plastic deformation, fatigue cracks and ultimate failure. Therefore, it is very important to accurately evaluate and predict the mechanical properties of metal sheets.

[0003] Metal sheet tensile specimens are one of the important experimental methods used to test the mechanical and engineering properties of metal materials. In the tensile test, metal sheets are usually cut into specimens with standard sizes and geometric shapes, and then tensile forces are applied to generate stress, causing the specimens to extend and eventually break. This test can provide information about the tensile strength, yield strength, elongation, and fracture characteristics of metal materials.

[0004] In the tensile test of metal plates, it is necessary to clamp both sides of the metal plate and then apply pressure until it begins to break. However, in this method, the clamping surface is directly clamped as a plane. If the flatness is not high enough after clamping, the metal plate will be unevenly stressed. This places high demands on the clamping surface. However, in years of use, a certain degree of wear is inevitable, resulting in certain differences in the plane. If the entire plane is not clamped, the clamping force is often difficult to meet the standard. When the wear difference is small, the impact is not obvious, but when the wear increases, the stability of the clamping surface will decrease, and there is a probability that the accuracy of the detection will be affected.

[0005] In view of this, the present utility model is proposed. Utility Model Content

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] A fully automatic metal sheet tensile test specimen special fixture device, comprising:

[0008] The main seat;

[0009] Mounting slot;

[0010] The installation groove is provided on the front side of the main seat, and both sides of the inner wall of the installation groove are arranged in inclined surfaces;

[0011] Hydraulic lever;

[0012] The hydraulic rod is arranged through the inner wall of the main seat to provide clamping force for the sample;

[0013] Boss;

[0014] The boss is arranged above the main seat, and an operation port is opened on one side;

[0015] two wedges;

[0016] The wedge block is fitted on one side of the inner wall of the installation groove, and the two wedge blocks are symmetrically arranged on both sides of the bottom end of the hydraulic rod;

[0017] two demarcation poles;

[0018] The demarcation rod is arranged on the lower surface of the wedge block and is used for pressing the surface of the sample;

[0019] Rotating pin;

[0020] The rotating pin is arranged through the inner wall of the mounting groove;

[0021] Two lever arm blocks;

[0022] The force arm block is arranged on the inner wall of the installation groove, and one end of the dividing rod is fixedly connected to one side of the force arm block, and the two force arm blocks move around the rotating pin as the axis;

[0023] Pressure column;

[0024] The pressure column is located at the bottom end of the hydraulic rod and is fixedly connected, and the pressure column is located at the opposite surfaces of the two force arm blocks and is arranged in a close fit.

[0025] Preferably, a mounting sleeve is passed through and communicated between the operating port and the mounting groove, the hydraulic rod is passed through the inner wall of the mounting sleeve, and a load-bearing seat for cooperating with the mounting sleeve to limit the position is fixedly connected to the surface of the hydraulic rod.

[0026] Preferably, a plurality of reinforcing welding plates are provided on both sides of the main seat, and two positioning grooves are provided on the front side of the main seat.

[0027] Preferably, the wedge block comprises a block body, one side of the block body is provided with a pressure surface that fits with the inner wall of the installation groove, and the other side of the block body is provided with a clamping surface for fixing the sample;

[0028] The lower surface of the block is provided with a pressure surface in an inclined shape, and the pressure surface is arranged to fit the surface of the corresponding dividing rod;

[0029] A limiting groove is arranged above the block, and the bottom end of the hydraulic rod is arranged in the limiting groove.

[0030] Preferably, a positioning block is provided on the inner wall of the positioning groove, a screw is provided through the surface of the positioning block, and the screw is fixedly connected to the inner wall of the positioning groove.

[0031] Preferably, the bottom end of the hydraulic rod is fixedly connected to a limiting block, and the limiting grooves of the two wedge blocks are respectively arranged on both sides of the limiting block.

[0032] Preferably, a clamping hole for fixing a rotating pin is formed through the inner wall of the mounting groove, and rotating sleeves are fixed on the surfaces of the two force arm blocks, and the two rotating sleeves rotate alternately on the surface of the rotating pin.

[0033] Preferably, the top end of the hydraulic rod is disposed in the operating port, the upper surface of the boss is fixedly connected with a mounting portion, and a mounting port for installation is provided through the surface of the mounting portion.

[0034] Beneficial effects:

[0035] When the present invention is in use, the limit block is pressed downward by the hydraulic rod, and then the limit block is pressed downward in the limit groove during the pressure process, so that the pressure surface of the wedge block and the inclined surface of the installation groove guide the two wedge blocks to move downward and also perform clamping movement towards each other. At the same time, the bottom end of the hydraulic rod presses the two force arm blocks downward through the pressure column, so that the two force arm blocks deflect along the rotating pin as the axis, and clamp the sample surface with the dividing rod at the bottom. The dividing rod moves in an arc trajectory under the action of the force arm block, and at the same time, the two wedge blocks move downward. The wedges are also moving closer to each other, so that the pressure surface of the wedges further squeezes the dividing rod until the wedges are fitted to the surface of the sample. At this time, the dividing rod is located below the fitting surface of the wedges and the sample. Under the clamping of the two dividing rods, a uniform linear force surface is formed, which is fitted and fixed with the clamping surfaces of the two wedges. It not only has a high clamping force, but also can avoid the wear of the clamping surface during long-term use, causing uneven force on the clamping contact surface. It not only greatly improves the clamping effect, but also will not affect the detection effect with the increase of years of use.

[0036] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In the attached picture:

[0038] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0039] Figure 2 It is a three-dimensional structural schematic diagram of the present invention from another viewing angle;

[0040] Figure 3 It is a schematic structural diagram of the present invention;

[0041] Figure 4It is a schematic diagram of the explosion structure of the main seat of the present invention;

[0042] Figure 5 It is a schematic diagram of the structure of the cooperation between two force arm blocks and a rotating pin of the present invention;

[0043] Figure 6 It is a structural schematic diagram of the main seat section of the present invention;

[0044] Figure 7 It is a schematic diagram of the planar structure of the wedge block of the present invention.

[0045] In the figure: 1. main seat; 2. hydraulic rod; 3. wedge block; 31. block; 32. limit groove; 33. pressure surface; 34. clamping surface; 35. pressure surface; 4. limit block; 5. installation groove; 6. operation port; 7. rotating pin; 8. rotating sleeve; 9. arm block; 10. pressure column; 11. positioning groove; 12. screw; 13. positioning block; 14. installation sleeve; 15. load-bearing seat; 16. installation part; 17. installation port; 18. boss; 19. reinforcement welding plate; 20. dividing rod; 21. clamping hole. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model.

[0047] like Figures 1 to 7 As shown, a fully automatic metal sheet tensile test specimen special fixture device comprises:

[0048] Main seat 1;

[0049] Mounting slot 5;

[0050] The installation groove 5 is provided on the front side of the main seat 1, and both sides of the inner wall of the installation groove 5 are arranged in inclined surfaces;

[0051] Hydraulic rod 2;

[0052] The hydraulic rod 2 is arranged through the inner wall of the main seat 1 to provide clamping force for the sample;

[0053] Boss 18;

[0054] The boss 18 is located above the main seat 1 and has an operation port 6 on one side.

[0055] Two wedges 3;

[0056] The wedge block 3 is arranged on one side of the inner wall of the installation groove 5, and the two wedge blocks 3 are symmetrically arranged on both sides of the bottom end of the hydraulic rod 2;

[0057] two dividing rods 20;

[0058] The demarcation rod 20 is arranged on the lower surface of the wedge 3 to press the surface of the sample;

[0059] Rotating pin 7;

[0060] The rotating pin 7 is arranged through the inner wall of the mounting groove 5;

[0061] Two lever arm blocks 9;

[0062] The arm block 9 is arranged on the inner wall of the mounting groove 5, and one end of the dividing rod 20 is fixedly connected to one side of the arm block 9, and the two arm blocks 9 move around the rotating pin 7 as the axis.

[0063] Pressure column 10;

[0064] The pressure column 10 is fixedly connected to the bottom end of the hydraulic rod 2 , and the pressure column 10 is arranged on opposite surfaces of the two force arm blocks 9 .

[0065] Specifically, Figure 6 As shown: a mounting sleeve 14 is connected between the operating port 6 and the mounting groove 5, the hydraulic rod 2 is arranged on the inner wall of the mounting sleeve 14, and a load-bearing seat 15 for cooperating with the mounting sleeve 14 to limit the position is fixedly connected to the surface of the hydraulic rod 2.

[0066] The mounting sleeve 14 connects and fixes the hydraulic rod 2 and provides a movable axial support to the hydraulic rod 2. Specifically, the mounting sleeve 14 is located inside the main seat 1, and is arranged around the hydraulic rod 2 to stably support the force of the hydraulic rod 2 during the test.

[0067] The load-bearing seat 15 is used to support and fix the hydraulic rod 2 to withstand the force applied to the hydraulic rod 2 during the test. The load-bearing seat 15, as the supporting point of the hydraulic rod 2, can withstand the vertical force applied by the hydraulic rod 2 during the test and transfer it to the main seat 1 or other structures to ensure the stable application of the test load.

[0068] Specifically, Figure 1 As shown: a plurality of reinforcing welding plates 19 are provided on both sides of the main seat 1 , and two positioning grooves 11 are provided on the front side of the main seat 1 .

[0069] The reinforcing welding plate 19 can effectively enhance the strength of the main seat 1 and avoid slight deformation.

[0070] Specifically, Figure 7 As shown: the wedge block 3 includes a block body 31, one side of the block body 31 is provided with a pressure surface 33 that fits with the inner wall of the mounting groove 5, and the other side of the block body 31 is provided with a clamping surface 34 for fixing the sample;

[0071] The lower surface of the block 31 is provided with a pressure surface 35 in an inclined shape, and the pressure surface 35 is arranged to fit the surface of the corresponding dividing rod 20;

[0072] A limiting groove 32 is disposed above the block 31 , and the bottom end of the hydraulic rod 2 is disposed in the limiting groove 32 .

[0073] The pressure surface 33 of the wedge 3 is inclined and consistent with the inclination of the inner wall of the mounting groove 5, which can guide the movement of the wedge 3 under the cooperation of the inclined surface. At the same time, the pressure surface 35 is also arranged in an inclined surface, and can press the dividing rod 20 through the inclined surface when it can move downward.

[0074] Specifically, Figure 4 As shown, a positioning block 13 is provided on the inner wall of the positioning groove 11 , a screw 12 is provided through the surface of the positioning block 13 , and the screw 12 is fixedly connected to the inner wall of the positioning groove 11 .

[0075] The positioning block 13 can fit against the wedge block 3 to limit its position, and can keep the wedge block 3 moving up and down in the installation groove 5 so that it cannot slide out of the installation groove 5 directly.

[0076] Specifically, Figure 3 As shown: the bottom end of the hydraulic rod 2 is fixedly connected to the limiting block 4, and the limiting grooves 32 of the two wedge blocks 3 are respectively arranged on both sides of the limiting block 4.

[0077] The limiting block 4 is located in the limiting groove 32 so that it can move up and down with the wedge block 3. At the same time, the two wedge blocks 3 move toward each other so that the limiting groove 32 can slide on the surface of the limiting block 4 and move a certain distance in a small range.

[0078] Specifically, Figure 4 As shown, a clamping hole 21 for fixing the rotating pin 7 is formed through the inner wall of the mounting groove 5 , and rotating sleeves 8 are fixed on the surfaces of the two force arm blocks 9 , and the two rotating sleeves 8 rotate alternately on the surface of the rotating pin 7 .

[0079] The rotating sleeve 8 can maintain good support for the lever arm block 9 and can maintain good stability on the surface of the rotating pin 7 at the same time.

[0080] Specifically, Figure 2 As shown, the top end of the hydraulic rod 2 is disposed in the operating port 6, the upper surface of the boss 18 is fixedly connected with a mounting portion 16, and a mounting port 17 for mounting is formed through the surface of the mounting portion 16.

[0081] The mounting portion 16 can be fixed to a hydraulic press for testing through the mounting opening 17 , so as to facilitate the testing.

[0082] The hydraulic rod 2 squeezes the limit block 4 downward, and then the limit block 4 is squeezed downward in the limit groove 32 during the pressure process, so that the pressure surface 33 of the wedge block 3 and the inclined surface of the installation groove 5 are guided, and the two wedge blocks 3 move downward and also make a clamping movement towards each other. At the same time, the bottom end of the hydraulic rod 2 squeezes the two force arm blocks 9 downward through the pressure column 10, so that the two force arm blocks 9 deflect along the rotating pin 7 as the axis, and clamps the sample surface with the dividing rod 20 at the bottom. The dividing rod 20 moves in an arc trajectory under the action of the force arm block 9. At the same time, when the wedge block 3 moves downward, the two wedge blocks 3 also move closer to each other, so that the pressure surface 35 of the wedge block 3 further squeezes the dividing rod 20 until the wedge block 3 fits the surface of the sample. At this time, the dividing rod 20 is located below the fitting surface of the wedge block 3 and the sample. Under the clamping of the two dividing rods 20, a uniform linear force surface is formed, which is fitted and fixed with the clamping surfaces 34 of the two wedge blocks 3 to complete the clamping.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fully automatic metal sheet tensile test specimen special fixture device, characterized in that: include: Main seat (1); Mounting slot (5); The installation groove (5) is provided on the front side of the main seat (1), and both sides of the inner wall of the installation groove (5) are arranged in the form of inclined surfaces; Hydraulic rod (2); The hydraulic rod (2) is arranged through the inner wall of the main seat (1) and is used to provide clamping force for the sample; Boss (18); The boss (18) is located above the main seat (1) and has an operating port (6) on one side; two wedges (3); The wedge block (3) is arranged in close contact with one side of the inner wall of the installation groove (5), and the two wedge blocks (3) are symmetrically arranged on both sides of the bottom end of the hydraulic rod (2); two dividing rods (20); The dividing rod (20) is arranged on the lower surface of the wedge (3) and is used for pressing the surface of the sample; Rotating pin (7); The rotating pin (7) is arranged to penetrate the inner wall of the mounting groove (5); two lever arm blocks (9); The arm block (9) is arranged on the inner wall of the mounting groove (5), and one end of the dividing rod (20) is fixedly connected to one side of the arm block (9), and the two arm blocks (9) move around the rotating pin (7) as the axis. Pressure column (10); The pressure column (10) is fixedly connected to the bottom end of the hydraulic rod (2), and the pressure column (10) is arranged to fit on the opposite surfaces of the two force arm blocks (9).

2. The fully automatic metal sheet tensile test specimen special fixture device according to claim 1 is characterized in that: An installation sleeve (14) is connected between the operating port (6) and the installation groove (5), the hydraulic rod (2) is arranged on the inner wall of the installation sleeve (14), and a bearing seat (15) for cooperating with the installation sleeve (14) to limit the position is fixedly connected to the surface of the hydraulic rod (2).

3. The fully automatic metal sheet tensile test specimen special fixture device according to claim 1 is characterized in that: A plurality of reinforcing welding plates (19) are provided on both sides of the main seat (1), and two positioning grooves (11) are provided on the front side of the main seat (1).

4. The fully automatic metal sheet tensile test specimen special fixture device according to claim 1, characterized in that: The wedge block (3) comprises a block body (31), one side of the block body (31) is provided with a pressure surface (33) that is in contact with the inner wall of the mounting groove (5), and the other side of the block body (31) is provided with a clamping surface (34) for fixing a sample; The lower surface of the block (31) is provided with a pressure surface (35) in an inclined shape, and the pressure surface (35) is arranged to fit the surface of the corresponding dividing rod (20); A limiting groove (32) is arranged above the block (31), and the bottom end of the hydraulic rod (2) is arranged in the limiting groove (32).

5. The fully automatic metal sheet tensile test specimen special fixture device according to claim 3 is characterized in that: The inner wall of the positioning groove (11) is provided with a positioning block (13) for limiting the position, and the surface of the positioning block (13) is penetrated by a screw (12), and the screw (12) is located on the inner wall of the positioning groove (11) and fixedly connected.

6. The fully automatic metal sheet tensile test specimen special fixture device according to claim 4, characterized in that: The bottom end of the hydraulic rod (2) is fixedly connected to a limiting block (4), and the limiting grooves (32) of the two wedge blocks (3) are respectively arranged on both sides of the limiting block (4).

7. The fully automatic metal sheet tensile test specimen special fixture device according to claim 1, characterized in that: The inner wall of the installation groove (5) is penetrated by a clamping hole (21) for fixing the rotating pin (7), and the surfaces of the two force arm blocks (9) are fixed with rotating sleeves (8), and the two rotating sleeves (8) rotate alternately on the surface of the rotating pin (7).

8. The fully automatic metal sheet tensile test specimen special fixture device according to claim 1, characterized in that: The top end of the hydraulic rod (2) is arranged in the operating port (6), the upper surface of the boss (18) is fixedly connected with a mounting portion (16), and a mounting port (17) for mounting is provided through the surface of the mounting portion (16).

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