Auxiliary device for tensile test

Abstract

The utility model relates to an auxiliary device for a tensile test, which comprises a base plate, a V-shaped seat is mounted on the upper surface of the base plate, and two clamping plates are mounted in the V-shaped seat through a clamping mechanism; an L-shaped vertical plate is installed on the side edge of the upper surface of the base plate, a lifting plate is installed below a transverse plate of the L-shaped vertical plate through an elastic mechanism, two sliding sleeves are slidably installed on the outer surface of the lifting plate, punching needles are installed on the lower surfaces of the sliding sleeves, bolts are installed on the outer surfaces of the sliding sleeves, and first scale marks are arranged on the outer surface of the lifting plate in the length direction of the lifting plate; and a lifting mechanism capable of adjusting the height of the lifting plate is arranged above the transverse plate of the L-shaped vertical plate. Through cooperation of the elastic mechanism and the lifting mechanism, the height of the punching needle can be adjusted according to different sizes and materials of test pieces, and the punching needle is driven by elastic force to impact the surfaces of the test pieces to complete dotting, so that the dotting force can be accurately adjusted, and the situations that the test pieces are damaged and the accuracy of test results is influenced due to too large force are avoided.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology, specifically to an auxiliary device for tensile testing. Background Technology

[0002] Tensile testing is a test method that determines the mechanical properties of materials by applying axial tensile load. It is mainly used to determine the tensile strength, yield strength, elongation and reduction of area of ​​materials to evaluate their mechanical properties and quality.

[0003] Before conducting tensile tests on cylindrical metal specimens, it is necessary to mark interval points on the surface of the specimen. Currently, this is mainly done by dotting. However, the impact force generated during dotting often causes slight vibration or even shaking of the specimen, thus affecting the accuracy of the dotting. In addition, the force applied during dotting is difficult to control precisely; excessive force may damage the specimen and affect the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for tensile testing, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution.

[0006] An auxiliary device for tensile testing includes a base plate. A V-shaped seat is mounted on the upper surface of the base plate, and two clamping plates are mounted inside the V-shaped seat via a clamping mechanism. An L-shaped vertical plate is mounted on the side of the upper surface of the base plate. A lifting plate is mounted below the horizontal plate of the L-shaped vertical plate via an elastic mechanism. Two sliding sleeves are slidably mounted on the outer surface of the lifting plate. Punches are mounted on the lower surface of the sliding sleeves, and bolts are mounted on the outer surface of the sliding sleeves. A first scale line is provided on the outer surface of the lifting plate along its length. A lifting mechanism capable of adjusting the height of the lifting plate is provided above the horizontal plate of the L-shaped vertical plate.

[0007] Therefore, by positioning the cylindrical metal specimen within the V-shaped base, and then fixing it by clamping two plates at both ends via a clamping mechanism, slight vibration or even shaking of the specimen during marking can be avoided, ensuring the accuracy of the marking. Through the coordination of the elastic and lifting mechanisms, the height of the punch can be adjusted according to the size and material of the specimen, and the elastic force is used to drive it to impact the surface of the specimen to complete the marking. Thus, the marking force can be precisely adjusted, avoiding excessive force that could damage the specimen and affect the accuracy of the test results.

[0008] Furthermore, the clamping mechanism includes a mounting groove inside the V-shaped seat, and a first screw with a pair of reverse threads is rotatably mounted inside the mounting groove. A first nut seat is mounted on each of the two reverse threads of the first screw, and a clamping plate is mounted on the upper surface of the first nut seat.

[0009] Furthermore, the elastic mechanism includes two sliding rods that vertically penetrate the interior of the L-shaped vertical plate and horizontal plate. The bottom of both sliding rods is connected to the upper surface of the lifting plate. A first spring is sleeved on the outer surface of the sliding rods. The two ends of the first spring abut against the lifting plate and the horizontal plate of the L-shaped vertical plate, respectively. A top plate is installed on the top of both sliding rods. A second scale line is set on the outer surface of the sliding rods along its height direction.

[0010] Furthermore, the lifting mechanism includes a U-shaped plate installed on the upper surface of the L-shaped vertical plate, a second screw is rotatably installed inside the U-shaped plate, a second nut seat is installed on the outer surface of the second screw, and a plug-in mechanism is provided between the second nut seat and the top plate.

[0011] Furthermore, the insertion mechanism includes a wedge block mounted on the upper surface of the top plate, with a slot on the outer surface of the wedge block. Two guide rods are provided through the interior of the second nut seat, and a push block is installed at the ends of the two guide rods. A second spring is sleeved on the outer surface of the guide rods, and the two ends of the second spring abut against the second nut seat and the push block, respectively. A wedge plate matching the slot is installed on the outer surface of the push block.

[0012] Furthermore, the inner wall of the U-shaped plate is provided with a groove along its height direction, and a slider is installed on the outer surface of the second nut seat, with the slider set in the groove.

[0013] Furthermore, a handwheel is installed on the top of the second screw, and a knob is installed on the end of the first screw.

[0014] Furthermore, the first scale line extends from the middle position of the lifting plate to both sides along the length of the lifting plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] 1. This utility model uses a clamping mechanism to drive two clamping plates to clamp and fix the cylindrical metal specimen at both ends, thereby avoiding slight vibration or even shaking of the specimen during marking and ensuring the accuracy of marking.

[0017] 2. This utility model, through the cooperation of the elastic mechanism and the lifting mechanism, can precisely adjust the force of the marking, avoiding damage to the specimen due to excessive force and affecting the accuracy of the test results. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the clamping mechanism in this utility model;

[0021] Figure 4 This is a schematic diagram of the insertion mechanism in this utility model.

[0022] In the diagram: 100, base plate; 101, V-shaped seat; 102, clamping plate; 103, L-shaped upright plate; 104, lifting plate; 105, sliding sleeve; 106, punch; 107, bolt; 108, first scale line; 200, clamping mechanism; 201, mounting groove; 202, first screw; 203, first nut seat; 300, elastic mechanism; 301, sliding rod; 302, first spring; 303, top plate; 304, second scale line; 400, lifting mechanism; 401, U-shaped plate; 402, second screw; 403, second nut seat; 500, insertion mechanism; 501, wedge block; 502, slot; 503, guide rod; 504, push block; 505, second spring; 506, wedge plate; 600, sliding groove; 601, slider; 700, handwheel; 701, knob. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0025] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0026] Please see Figures 1-4 This utility model provides an auxiliary device for tensile testing, including a base plate 100. A V-shaped seat 101 is mounted on the upper surface of the base plate 100, and two clamping plates 102 are mounted inside the V-shaped seat 101 via a clamping mechanism 200. An L-shaped vertical plate 103 is mounted on the side of the upper surface of the base plate 100. A lifting plate 104 is mounted below the horizontal plate of the L-shaped vertical plate 103 via an elastic mechanism 300. Two sliding sleeves 105 are slidably mounted on the outer surface of the lifting plate 104. A punch 106 is mounted on the lower surface of the sliding sleeve 105, and a bolt 107 is mounted on the outer surface of the sliding sleeve 105. A first scale line 108 is provided on the outer surface of the lifting plate 104 along its length. A lifting mechanism 400 capable of adjusting the height of the lifting plate 104 is provided above the horizontal plate of the L-shaped vertical plate 103.

[0027] When marking the cylindrical metal specimen, it is first placed horizontally in the V-shaped seat 101. The V-shaped seat 101 can serve as a preliminary positioning tool. Then, the clamping mechanism 200 drives the two clamping plates 102 to move closer to each other and clamp them at both ends for fixation.

[0028] Then, slide the sliding sleeve 105 on the lifting plate 104, adjust the distance between the two punches 106 using the first scale line 108, and tighten the bolt 107 to fix the position of the punches 106. Then, the lifting mechanism 400 drives the punches 106 to rise to a suitable height, and the elastic force of the elastic mechanism 300 drives the lifting plate 104 to move down quickly, and drives the punches 106 to hit the surface of the specimen, thereby achieving the purpose of marking and completing the initial gauge length before stretching the specimen.

[0029] Preferably, the clamping mechanism 200 includes a mounting groove 201 formed inside the V-shaped seat 101. A first screw 202 with a pair of reverse threads is rotatably mounted inside the mounting groove 201. A first nut seat 203 is mounted on each of the two reverse threads of the first screw 202. The clamping plate 102 is mounted on the upper surface of the first nut seat 203.

[0030] When the first screw 202 is rotated, the inner wall of the mounting groove 201 limits the first nut seat 203. Therefore, driven by the reverse thread, the two first nut seats 203 can move closer or further apart. By causing the first nut seats 203 to drive the clamping plate 102 to clamp the end of the specimen, the purpose of clamping and fixing is achieved.

[0031] Preferably, the elastic mechanism 300 includes two slide rods 301 that vertically penetrate the interior of the horizontal plate of the L-shaped upright plate 103. The bottom of both slide rods 301 is connected to the upper surface of the lifting plate 104. A first spring 302 is sleeved on the outer surface of the slide rods 301. The two ends of the first spring 302 abut against the lifting plate 104 and the horizontal plate of the L-shaped upright plate 103, respectively. A top plate 303 is installed on the top of both slide rods 301. A second scale line 304 is provided on the outer surface of the slide rods 301 along its height direction.

[0032] When the lifting mechanism 400 moves the top plate 303 upward, the top plate 303 drives the lifting plate 104 to compress the first spring 302, storing energy. When the top plate 303 is released, the compressed first spring 302 releases its elastic force, which can push the lifting plate 104 to descend rapidly, causing the punch 106 to strike the surface of the specimen to make dots. Furthermore, by setting the second scale line 304, the rising height of the punch 106 can be precisely adjusted, achieving the purpose of precise adjustment of the dotting force.

[0033] Preferably, the lifting mechanism 400 includes a U-shaped plate 401 mounted on the upper surface of the horizontal plate of the L-shaped vertical plate 103, a second screw 402 rotatably mounted inside the U-shaped plate 401, a second nut seat 403 mounted on the outer surface of the second screw 402, and a plug-in mechanism 500 provided between the second nut seat 403 and the top plate 303.

[0034] When the second screw 402 is rotated, it drives the second nut seat 403 to rise. Through the connection of the plug-in mechanism 500, the top plate 303 can be raised, thus achieving the purpose of adjusting the height of the punch 106.

[0035] Preferably, the insertion mechanism 500 includes a wedge block 501 mounted on the upper surface of the top plate 303. The outer surface of the wedge block 501 is provided with a slot 502. Two guide rods 503 are provided through the interior of the second nut seat 403. The ends of the two guide rods 503 are jointly mounted with a push block 504. A second spring 505 is sleeved on the outer surface of the guide rods 503. The two ends of the second spring 505 abut against the second nut seat 403 and the push block 504 respectively. A wedge plate 506 matching the slot 502 is mounted on the outer surface of the push block 504.

[0036] When it is necessary to raise the top plate 303, the second screw 402 can be rotated first to lower the second nut seat 403 to the lowest position, and the end of the wedge plate 506 can be pressed against the outer surface of the wedge block 501. When the wedge plate 506 is pressed, it drives the push block 504 to move towards the second nut seat 403 and compresses the second spring 505. When the wedge plate 506 descends to the position corresponding to the slot 502, the compressed second spring 505 releases its elastic force and pushes the wedge plate 506 to automatically insert into the slot 502, thereby achieving the purpose of automatic insertion.

[0037] Next, rotating the second screw 402 causes the second nut seat 403 to rise, which in turn causes the top plate 303 to rise. When the punch 106 rises to the appropriate height, simply press the push block 504 to pull the wedge plate 506 out of the slot 502 to release the fixation on the top plate 303. At this time, under the elastic force of the first spring 302, the punch 106 can be pushed to descend quickly and make dots on the surface of the specimen.

[0038] Preferably, the inner wall of the U-shaped plate 401 is provided with a groove 600 along its height direction, and a slider 601 is installed on the outer surface of the second nut seat 403, and the slider 601 is disposed in the groove 600.

[0039] The groove 600 and the slider 601 can limit the second nut seat 403 and improve its stability during lifting.

[0040] Preferably, a handwheel 700 is mounted on the top of the second screw 402, and a knob 701 is mounted on the end of the first screw 202.

[0041] The handwheel 700 and knob 701 allow for convenient rotation of the second screw 402 and the first screw 202.

[0042] Preferably, the first scale line 108 extends from the middle position of the lifting plate 104 to both sides of the length direction of the lifting plate 104.

[0043] Since the sliding distance of both sliding sleeves 105 starts from the middle position of the lifting plate 104, it is convenient to calculate the entire length.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An auxiliary device for tensile test, comprising a base plate (100), characterized in that: a V-shaped seat (101) is mounted on the upper surface of the base plate (100), and two clamping plates (102) are mounted in the V-shaped seat (101) by a clamping mechanism (200); an L-shaped vertical plate (103) is mounted on the side of the upper surface of the base plate (100), a lifting plate (104) is mounted below the horizontal plate of the L-shaped vertical plate (103) by an elastic mechanism (300), two sliding sleeves (105) are slidingly mounted on the outer surface of the lifting plate (104), a punch pin (106) is mounted on the lower surface of the sliding sleeve (105), a bolt (107) is mounted on the outer surface of the sliding sleeve (105), and a first scale line (108) is arranged on the outer surface of the lifting plate (104) along the length direction thereof; a lifting mechanism (400) capable of adjusting the height of the lifting plate (104) is arranged above the horizontal plate of the L-shaped vertical plate (103).

2. The auxiliary device for tensile test according to claim 1, characterized in that: the clamping mechanism (200) comprises a mounting groove (201) opened in the V-shaped seat (101), a first screw rod (202) with a pair of reverse threads is rotatably mounted in the mounting groove (201), a first nut seat (203) is mounted on each of the reverse threads of the first screw rod (202), and the clamping plate (102) is mounted on the upper surface of the first nut seat (203).

3. The auxiliary device for tensile test according to claim 2, characterized in that: the elastic mechanism (300) comprises two slide rods (301) vertically penetrating through the inside of the horizontal plate of the L-shaped vertical plate (103), the bottom of each of the two slide rods (301) is connected with the upper surface of the lifting plate (104), a first spring (302) is sleeved on the outer surface of the slide rod (301), the two ends of the first spring (302) are respectively abutted with the lifting plate (104) and the horizontal plate of the L-shaped vertical plate (103), and a top plate (303) is jointly mounted on the top of the two slide rods (301), and a second scale line (304) is arranged on the outer surface of the slide rod (301) along the height direction thereof.

4. The auxiliary device for tensile test according to claim 3, characterized in that: the lifting mechanism (400) comprises a U-shaped plate (401) mounted on the upper surface of the horizontal plate of the L-shaped vertical plate (103), a second screw rod (402) is rotatably mounted in the U-shaped plate (401), a second nut seat (403) is mounted on the outer surface of the second screw rod (402), and a plug-in mechanism (500) is arranged between the second nut seat (403) and the top plate (303).

5. The auxiliary device for tensile test according to claim 4, characterized in that: The plug-in mechanism (500) includes a wedge block (501) installed on the top surface of the top plate (303), an insertion slot (502) is formed on the outer surface of the wedge block (501), two guide rods (503) are arranged through the inside of the second nut seat (403), a push block (504) is installed at the end of the two guide rods (503), a second spring (505) is sleeved on the outer surface of the guide rod (503), the two ends of the second spring (505) are respectively abutted with the second nut seat (403) and the push block (504), and a wedge plate (506) matched with the insertion slot (502) is installed on the outer surface of the push block (504).

6. The auxiliary device for tensile test according to claim 4, characterized in that: The inner wall of the U-shaped plate (401) is provided with a sliding groove (600) along the height direction, and the outer surface of the second nut seat (403) is provided with a sliding block (601), and the sliding block (601) is arranged in the sliding groove (600).

7. The auxiliary device for tensile test according to claim 4, characterized in that: The top of the second screw rod (402) is provided with a hand wheel (700), and the end of the first screw rod (202) is provided with a knob (701).

8. The auxiliary device for tensile test according to claim 1, characterized in that: The first scale line (108) extends to both sides of the length direction of the lifting plate (104) respectively with the middle position of the lifting plate (104) as the starting point.

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