Clamp for steel tensile test

Abstract

The utility model discloses a clamp for steel material tensile detection belongs to material strength detection field, including base, support frame, tensile system and wedge, clamp still sets up limit mechanism, and limit mechanism includes the slide rail no.

Description

Technical Field

[0001] This utility model relates to material strength testing, and more particularly to a fixture for tensile testing of steel. Background Technology

[0002] Tensile testing of steel is an important test for evaluating the mechanical properties of steel. During the testing process, a special tensile testing fixture is required to clamp the two ends of the steel specimen. In order to accommodate steel specimens of different specifications, shapes or strengths, the fixture is usually equipped with replaceable wedges. By changing the wedges, different specimens can be effectively clamped.

[0003] In existing technical solutions, in order to ensure the stability and reliability of the wedge block under huge tensile force, bolts or screws are usually used to fix the wedge block to the clamp. When the wedge block needs to be replaced, the operator must use tools such as wrenches to loosen the fastening bolts one by one, and after replacing the wedge block, tighten the limit screws one by one.

[0004] This tool- and threaded fastening method is particularly cumbersome and time-consuming in high-throughput testing work that requires frequent sample replacement. The entire disassembly and assembly process not only seriously reduces the overall efficiency of testing, but also increases the labor intensity of operators.

[0005] Therefore, this utility model proposes a fixture for tensile testing of steel to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems of existing steel tensile testing fixtures, such as the need to use tools to tighten bolts when replacing wedge blocks, cumbersome operation, and low fixing efficiency, this utility model aims to provide a steel tensile testing fixture with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a fixture for tensile testing of steel, including: a base, a support frame, a tensile system and a wedge block, as well as a limiting mechanism.

[0008] The limiting mechanism includes a slide rail fixedly connected to the surface of the tensioning system and a baffle. The baffle is slidably connected to the slide rail through a groove on the support frame and is used to abut against the wedge block.

[0009] The rear surface of the baffle is provided with a slide rail 2, and the limiting mechanism also includes a limiting rod, which slides with the slide rail 2 through a groove 2 opened on the surface.

[0010] The limiting mechanism further includes a limiting block, which is fixed to the surface of the tension system and located below the sliding path of the limiting rod. The surface of the limiting block is set as an inclined surface that contacts the bottom of the limiting rod.

[0011] In the assembly, as the baffle moves forward, the limiting rod is pressed upward along the slide rail by the inclined surface of the limiting block, and falls down by gravity after passing the limiting block, thus locking the limiting rod and achieving rapid fixation of the wedge block.

[0012] Preferably, a slide rail two is fixedly connected to the rear end surface of the baffle, and the limiting rod is slidably sleeved on the slide rail two through the slide groove two. This structure ensures that the limiting rod can move stably back and forth along the sliding direction of the slide rail one with the baffle, while retaining the vertical sliding space of the limiting rod on the slide rail two so as to perform the locking action.

[0013] Preferably, the bottom shape of the limiting rod is designed as a semi-triangle. The inclined surface of the semi-triangle is used to smoothly slide and contact the inclined surface of the limiting block when moving forward, while the vertical surface of the semi-triangle is used to firmly engage the limiting block after the limiting rod falls, preventing the support frame from moving backward and forming a reliable one-way lock.

[0014] Preferably, the surface of the limiting block is specifically set as a triangle, and the front end of the limiting block is also provided with a triangular block set in the opposite direction, which is used to fix the limiting rod after it is inserted. This double locking structure further enhances the locking firmness and prevents accidental loosening under high tension.

[0015] Preferably, the fixture also includes a protective mechanism, which includes a protective door. The protective door is closable and located at the front end of the tensile system to close during tensile testing to block steel fracture debris and effectively protect the personal safety of the test personnel.

[0016] Preferably, the protective mechanism also includes a fan, which is located on the top of the support frame and positioned directly opposite the stretching area. The fan is used to actively blow the rust powder generated during the testing process toward the top of the base, preventing the rust powder from drifting and entering the precision components of the stretching system, thus ensuring the reliability of the clamping.

[0017] Preferably, the protective mechanism also includes a cylinder located on the top of the base and a dust removal plate. One end of the dust removal plate is connected to the cylinder for transmission. The cylinder serves as a power source to drive the dust removal plate to move along the top surface of the base after the inspection is completed, thereby achieving automated cleaning operations.

[0018] Preferably, a slanted silicone plate is fixedly connected to the bottom of the dust removal plate. The slanted silicone plate is elastic and can elastically contact and clean and scrape off rust powder that falls on the top surface of the base when the dust removal plate moves forward. The silicone material ensures thorough cleaning and is not easy to wear on the surface of the base.

[0019] This utility model has the following beneficial effects: 1. This utility model solves the problem of repeated screw tightening, cumbersome operation, and low efficiency in the prior art when replacing wedge blocks by setting a limiting mechanism and using the structure of baffle, slide rail, and limiting rod with inclined self-locking function and limiting block. The wedge block can be quickly locked and released without tools, which greatly improves the detection efficiency.

[0020] 2. This utility model solves the problem of easy flying debris and safety hazards when steel breaks during tensile testing by setting a protective mechanism and a protective door at the front end of the tensile system. It effectively blocks flying debris and significantly improves operational safety.

[0021] 3. This utility model, by setting up a protective mechanism, uses a fan at the top to blow rust powder to the base, and in conjunction with the cylinder, dust removal plate and inclined silicone plate set on the base, solves the problem in the prior art that rust powder is easy to scatter and contaminate the stretching system components and is difficult to clean. It actively controls the flow of rust powder and automatically and centrally cleans it, ensuring the clamping accuracy of the fixture and long-term stable operation. Attached Figure Description

[0022] Figure 1 This is a perspective view of the steel tensile testing fixture proposed in this utility model; Figure 2 This is a schematic diagram of the tensile system of the steel tensile testing fixture proposed in this utility model; Figure 3 This is a cross-sectional view of the support frame of the steel tensile testing fixture proposed in this utility model; Figure 4 This is an exploded view of the limiting mechanism of the steel tensile testing fixture proposed in this utility model.

[0023] Legend: 1. Base; 2. Limiting mechanism; 201. Baffle; 202. Slide rail one; 203. Slide groove one; 204. Slide rail two; 205. Limiting rod; 206. Limiting block; 207. Slide groove two; 3. Protective mechanism; 301. Protective door; 302. Fan; 303. Cylinder; 304. Dust removal plate; 305. Inclined silicone plate; 4. Tensioning system; 5. Support frame; 6. Wedge block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0025] Example: Please refer to Figures 1 to 4 This utility model provides a fixture for tensile testing of steel, which aims to solve the problems of cumbersome replacement of the wedge block 6 and susceptibility to rust powder contamination and debris damage during testing in the prior art. like Figure 1 , Figure 2 and Figure 3 As shown, the steel tensile testing fixture includes a base 1 and a support frame 5 vertically fixed on the base 1. The base 1 serves as the mounting base for the entire device. The support frame 5 is equipped with a tensile system 4. The tensile system 4 is used to detachably mount wedge blocks 6. The wedge blocks 6 are used to clamp steel samples. The fixture also includes a limiting mechanism 2 for quickly fixing the wedge blocks 6 and a protective mechanism 3 for safety and dust removal. The limiting mechanism 2 includes a slide rail 202 fixedly connected to the surface of the tensile system 4. A baffle 201 is slidably connected to the slide rail 202 via a groove 203 opened on the support frame 5. 201 is used to abut against the wedge block 6. The rear end surface of the baffle 201 is provided with a slide rail 204. The limiting rod 205 slides with the slide rail 204 through a slide groove 207 opened on the surface. The limiting block 206 is fixed to the surface of the tension system 4 and located below the sliding path of the limiting rod 205. The surface of the limiting block 206 is set as an inclined surface that contacts the bottom of the limiting rod 205. When the limiting rod 205 moves forward with the baffle 201, it is squeezed by the inclined surface of the limiting block 206 and moves upward along the slide rail 204. After passing the limiting block 206, it falls down by gravity to lock the limiting rod 205.

[0026] Specifically, a slide rail 204 is fixedly connected to the rear end surface of the baffle 201. The limiting rod 205 is slidably sleeved on the slide rail 204 through the slide groove 207. This structure allows the limiting rod 205 to move together with the baffle 201 along the sliding direction of the slide rail 202. The bottom of the limiting rod 205 is a semi-triangular shape. The inclined surface of the semi-triangular shape is used to slide in contact with the inclined surface of the limiting block 206. The vertical surface of the semi-triangular shape is used to engage the limiting block 206 after the limiting rod 205 falls, preventing the limiting rod 205 from moving backward. The surface of the limiting block 206 is set as a triangle, and the front end of the limiting block 206 is also provided with a triangular block set in the opposite direction, which is used to fix the limiting rod 205 after it is engaged.

[0027] Please refer to Figure 1 , Figure 2 and Figure 3The protective mechanism 3 includes a protective door 301, a fan 302, a cylinder 303, a dust removal plate 304, and an inclined silicone plate 305. The protective door 301 is closable and located at the front end of the tensile system 4, and its function is to close during tensile testing to prevent steel fracture debris. The fan 302 is located on the top of the support frame 5, and its function is to blow rust powder generated during the testing process towards the top of the base 1. The cylinder 303 is located on the top of the base 1, and one end of the dust removal plate 304 is connected to the cylinder 303. 4 is used to move along the top surface of the base 1 under the drive of the cylinder 303. To enhance the cleaning effect, the bottom of the dust removal plate 304 is fixedly connected to an inclined silicone plate 305. In the assembled state, the inclined silicone plate 305 is used to elastically contact and clean the rust powder falling on the top surface of the base 1 when the dust removal plate 304 moves forward. As for the specific drive control of the cylinder 303 and the electrical connection method of the fan 302, those skilled in the art can use a variety of conventional methods to achieve them. The specific internal structure belongs to the well-known technology in the field and will not be described in detail here.

[0028] As a preferred embodiment, to ensure the linkage between the limit rod 205 and the baffle 201, please refer to... Figure 4 The rear end surface of the baffle 201 is fixedly connected to the slide rail 204. The limiting rod 205 is slidably sleeved on the slide rail 204 through the slide groove 207 opened on the surface. This structure ensures that the limiting rod 205 moves together with the baffle 201 along the sliding direction of the slide rail 202.

[0029] As a preferred embodiment, to achieve reliable unidirectional snap-fit, please refer to... Figure 4 The bottom shape of the limiting rod 205 is set as a semi-triangle. The inclined surface of the semi-triangle is used to slide in contact with the inclined surface of the limiting block 206 when moving forward, and the vertical surface of the semi-triangle is used to engage the limiting block 206 after the limiting rod 205 falls to prevent the limiting rod 205 from moving backward.

[0030] As a preferred implementation method, to enhance the stability of the locking mechanism, please refer to... Figure 4 The surface of the limiting block 206 is set as a triangle, and the front end of the limiting block 206 is also provided with a triangular block set in the opposite direction. When the limiting rod 205 passes over the limiting block 206 and is locked in, the triangular block set in the opposite direction can achieve a more stable fixation.

[0031] As a preferred implementation method, to improve operational safety, please refer to... Figure 1 and Figure 2 The protective mechanism 3 includes a protective door 301, which is openable and closable at the front end of the tensile system 4. Closing the protective door 301 during tensile testing can effectively block the flying debris when the steel breaks.

[0032] As a preferred embodiment, in order to actively remove rust powder contamination, please refer to... Figure 3 The protective mechanism 3 also includes a fan 302, which is located on the top of the support frame 5. The airflow generated during operation can actively blow the rust powder that falls off the steel surface during the inspection process to the top of the base 1 for easy centralized cleaning.

[0033] As a preferred implementation method, to achieve automated cleaning, please refer to... Figure 3 The protective mechanism 3 also includes a cylinder 303 located on the top of the base 1 and a dust removal plate 304. One end of the dust removal plate 304 is connected to the cylinder 303 in a transmission manner. After the test is completed, the cylinder 303 starts to drive the dust removal plate 304 to move along the top surface of the base 1.

[0034] As a preferred implementation method, to improve the cleaning effect, please refer to... Figure 3 The bottom of the dust removal plate 304 is fixedly connected to an inclined silicone plate 305. The inclined silicone plate 305 is elastic and is used to closely contact and scrape off the rust powder that falls on the top surface of the base 1 when the dust removal plate 304 moves forward.

[0035] Working principle: When wedge block 6 needs to be replaced, the operator simply needs to manually lift the limiting rod 205, disengaging the vertical surface from the locking of the limiting block 206. At this time, the baffle 201 can quickly retract along the slide rail 202 under the action of the limiting rod 205, allowing the old wedge block 6 to be removed. After replacing the new wedge block 6, the operator pushes the baffle 201 forward, causing it to advance along the slide rail 202 and abut against the wedge block 6. During this process, the limiting rod 205, which advances along with the baffle 201, has its semi-triangular inclined surface at the bottom intersecting with the limiting rod 206. The triangular inclined surface of the positioning block 206 contacts and is squeezed, and the limiting rod 205 is forced to slide upward along the slide rail 204. When the limiting rod 205 passes the vertex of the limiting block 206, it falls naturally by gravity. The vertical surface of the limiting rod 205 is blocked by the limiting block 206, thereby preventing the baffle 201 and the limiting rod 205 from moving backward naturally, thus realizing the rapid locking of the wedge block 6. Through this synergistic effect of the limiting mechanism 2, this utility model solves the problem in the prior art that replacing the wedge block 6 requires turning screws, which is cumbersome and inefficient. During tensile testing, closing the protective door 301 effectively blocks flying debris when the steel breaks, protecting the operator's safety. Simultaneously, the fan 302, located at the top of the support frame 5, is activated to blow rust powder that falls off the steel surface during testing towards the top of the base 1, preventing rust powder from entering the tensile system 4 and affecting clamping accuracy. After testing, the cylinder 303, located at the top of the base 1, is activated to drive the dust removal plate 304 forward. The inclined silicone plate 305 at the bottom of the dust removal plate 304 elastically contacts the top surface of the base 1, scraping away and cleaning the collected rust powder. Through the synergistic effect of the protective mechanism 3, this invention achieves both safety protection and automatic dust removal, solving the problems of rust powder contamination affecting clamping accuracy and posing safety hazards.

Claims

1. A fixture for tensile testing of steel, comprising: The base (1), support frame (5), tension system (4) and wedge block (6) are provided. The support frame (5) is vertically fixed on the base (1), the tension system (4) is installed on the support frame (5), and the wedge block (6) is detachably installed on the tension system (4). Its features are, The clamp also includes a limiting mechanism (2), which includes: a slide rail one (202), a baffle (201), a slide rail two (204), a limiting rod (205), and a limiting block (206). The slide rail one (202) is fixedly connected to the surface of the tensioning system (4). The baffle (201) is slidably connected to the slide rail one (202) through a slide groove one (203) on the support frame (5) to abut against the wedge block (6). The slide rail two (204) is disposed on the rear end surface of the baffle (201). The limiting rod (205) is connected to the slide rail one (202) through a slide groove one (203) on the support frame (5) to abut against the wedge block (6). The slide rail two (204) is disposed on the rear end surface of the baffle (201). The slide groove 2 (207) is slidably engaged with the slide rail 2 (204). The limiting block (206) is fixed to the surface of the tension system (4) and located below the sliding path of the limiting rod (205). The surface of the limiting block (206) is set as an inclined surface that contacts the bottom of the limiting rod (205). When the limiting rod (205) moves forward with the baffle (201), it is squeezed by the inclined surface of the limiting block (206) and moves upward along the slide rail 2 (204). After passing the limiting block (206), it falls down by gravity to lock the limiting rod (205).

2. The steel tensile testing fixture according to claim 1, characterized in that, The rear end surface of the baffle (201) is fixedly connected to the slide rail two (204), and the limiting rod (205) is slidably sleeved on the slide rail two (204) through the slide groove two (207) so that the limiting rod (205) moves together with the baffle (201) along the sliding direction of the slide rail one (202).

3. The steel tensile testing fixture according to claim 1, characterized in that, The bottom of the limiting rod (205) is a semi-triangle. The inclined surface of the semi-triangle is used to slide in contact with the inclined surface of the limiting block (206). The vertical surface of the semi-triangle is used to engage the limiting block (206) after the limiting rod (205) is lowered, preventing the limiting rod (205) from moving backward.

4. The steel tensile testing fixture according to claim 1, characterized in that, The surface of the limiting block (206) is set as a triangle, and the front end of the limiting block (206) is also provided with a triangular block set in the opposite direction, which is used to fix the limiting rod (205) after it is inserted.

5. The steel tensile testing fixture according to claim 1, characterized in that, The fixture also includes a protective mechanism (3), which includes a protective door (301). The protective door (301) is openably and closably disposed at the front end of the tensile system (4) and is used to close during tensile testing to block steel fracture debris.

6. The steel tensile testing fixture according to claim 5, characterized in that, The protective mechanism (3) also includes a fan (302), which is located on the top of the support frame (5) and is used to blow the rust powder generated during the inspection process toward the top of the base (1).

7. The steel tensile testing fixture according to claim 5, characterized in that, The protective mechanism (3) further includes a cylinder (303) and a dust removal plate (304). The cylinder (303) is located on the top of the base (1). One end of the dust removal plate (304) is connected to the cylinder (303) for transmission and is used to move along the top surface of the base (1) under the drive of the cylinder (303).

8. The steel tensile testing fixture according to claim 7, characterized in that, The bottom of the dust removal plate (304) is fixedly connected to an inclined silicone plate (305), which is used to elastically contact and clean the rust powder falling on the top surface of the base (1) when the dust removal plate (304) moves forward.

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