High-temperature bar stretching tool

Abstract

The utility model discloses a bar high-temperature stretching tool, which is used for carrying out stretching test on a sample and comprises an upper clamp used for hooking one end part of the sample and a lower clamp used for hooking the other end part of the sample, and the upper clamp and the lower clamp respectively comprise a main body part, a left chuck, a right chuck and a driving mechanism; the left clamping head and the right clamping head are connected to the main body part in a sliding mode, and the driving mechanism is connected with the main body part. The driving mechanism is further connected with the left clamping head and the right clamping head and used for driving the left clamping head and the right clamping head to move face to face or back to back so as to adjust the distance between the left clamping head and the right clamping head, and the left clamping head is provided with a left hook part used for hooking the end of the sample. And a right hook part for hooking the end part of the sample is arranged on the right chuck. The tensile test device can be used for carrying out tensile test on various samples with different diameters, and is wider in application range and more convenient to use.

Description

Technical Field

[0001] The utility model relates to a high-temperature stretching tool for bars. Background Art

[0002] At present, in engines, boilers and oil refining equipment, some metal parts are used in high temperature environments for a long time and need to bear large loads. Therefore, it is necessary to test whether the high temperature mechanical properties of such metal materials meet the requirements. The commonly used test method is to use cylindrical metal bars as specimens and perform static axial tensile tests on the specimens in high temperature environments to evaluate the high temperature mechanical properties of metal materials. During the test, it is necessary to use a clamp to hook the two ends of the specimen. For example, a Chinese patent with publication number CN104931342A discloses a multifunctional high temperature tensile clamp, which can hook the two ends of the specimen through an upper clamp and a lower clamp. The upper clamp and the lower clamp are respectively provided with a clamping groove and a guide groove. Due to the width of the guide groove, the multifunctional high temperature tensile clamp can only perform tensile tests on specimens with smaller diameters, but cannot perform tensile tests on specimens with larger diameters. The scope of application is narrow, and there are many limitations and inconveniences in actual use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a high-temperature stretching tool for bars, which can perform stretching tests on samples of various diameters, has a wider application range and is more convenient to use.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a high-temperature tensile tool for bars, which is used to perform tensile tests on samples, and comprises an upper clamp for hooking one end of the sample and a lower clamp for hooking the other end of the sample, wherein the upper clamp and the lower clamp respectively comprise a main body, a left clamp, a right clamp and a driving mechanism;

[0005] The left clamp and the right clamp are respectively slidably connected to the main body component;

[0006] The driving mechanism is connected to the main body component, and is also connected to the left clamp and the right clamp respectively and is used to drive the left clamp and the right clamp to move toward or away from each other to adjust the distance between the left clamp and the right clamp;

[0007] The left clamp is provided with a left hook for hooking the end of the sample;

[0008] The right clamp is provided with a right hook portion for hooking the end of the sample.

[0009] Further, a T-slot is provided in the main body component;

[0010] The left clamp is provided with a left T-shaped portion, and the left T-shaped portion is slidably fitted in the T-shaped groove so that the left clamp is slidably connected to the main body component;

[0011] The right clamp is provided with a right T-shaped portion, and the right T-shaped portion is slidably fitted in the T-shaped groove so that the right clamp is slidably connected to the main body component.

[0012] Furthermore, the main body component is provided with a connecting screw portion.

[0013] A specific structure of the driving mechanism is further provided, wherein the driving mechanism comprises a driving screw and a fixing block;

[0014] The fixing block is connected to the main body component and is located between the left clamp and the right clamp, and a slot is provided in the fixing block;

[0015] The driving screw has a left threaded portion, a right threaded portion and a clamping portion;

[0016] The clamping portion is located between the left threaded portion and the right threaded portion, and the clamping portion is engaged and clamped in the clamping groove to limit the axial position of the driving screw;

[0017] The left threaded portion is thread-matched with the left chuck, and the right threaded portion is thread-matched with the right chuck. The left threaded portion and the right threaded portion have opposite rotation directions.

[0018] A specific structure of the fixing block is further provided, wherein the fixing block comprises a main body, a left wing and a right wing;

[0019] The left wing part and the right wing part are both connected to the main body part;

[0020] The main body extends into the T-slot;

[0021] The card slot is arranged in the main body.

[0022] Furthermore, the left wing portion and the right wing portion are respectively provided with connection holes;

[0023] The main body component is provided with bolt holes corresponding to the connection holes one by one and aligned with the corresponding connection holes;

[0024] The left wing part and the right wing part are respectively connected to the main body part by fastening bolts.

[0025] Further, the left clamp is provided with a left threaded hole matched with the left threaded portion, and the left threaded hole is provided in the left T-shaped portion;

[0026] The right chuck is provided with a right threaded hole which is matched and connected with the right threaded portion, and the right threaded hole is provided in the right T-shaped portion.

[0027] Furthermore, a square rotating portion is provided at one end of the driving screw.

[0028] Furthermore, the card slot is a U-shaped opening slot.

[0029] Furthermore, the main body is provided with two through holes intersecting in a cross shape;

[0030] One end portion of the left clamping head provided with the left hook portion and one end portion of the right clamping head provided with the right hook portion are respectively of conical structures.

[0031] After adopting the above technical scheme, the upper clamp includes a set of main parts, a left chuck, a right chuck and a driving mechanism, and the lower clamp also includes a set of main parts, a left chuck, a right chuck and a driving mechanism. The main parts in the upper clamp and the main parts in the lower clamp are both installed on the high-temperature stretching machine, and one end of the sample is hooked by the left hook and the right hook in the upper clamp, and the other end of the sample is hooked by the left hook and the right hook in the lower clamp. Then the high-temperature stretching machine drives the main parts in the upper clamp and the main parts in the lower clamp to separate from each other, and then stretch the sample to both ends, so as to perform a tensile test on the sample. Further, the distance between the left chuck and the right chuck in the upper clamp can be adjusted by the driving mechanism in the upper clamp, and the distance between the left chuck and the right chuck in the lower clamp can be adjusted by the driving mechanism in the lower clamp, so that the left hook and the right hook can hook the ends of samples of different diameters, so as to perform tensile tests on samples of various diameters, which has a wider range of applications and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of the high-temperature drawing tool for bars of the utility model when connected with the sample;

[0033] Figure 2 It is a front view of the upper clamp of the utility model;

[0034] Figure 3 It is a left side view of the upper clamp of the utility model;

[0035] Figure 4 It is an exploded view of the assembly of the upper clamp of the utility model;

[0036] Figure 5 It is a structural schematic diagram of the main body component of the utility model connected with the fixing block;

[0037] Figure 6 It is a structural schematic diagram of the left chuck, the right chuck and the driving mechanism of the utility model;

[0038] Figure 7 It is a structural schematic diagram of the right clamp of the utility model;

[0039] Figure 8 It is a structural schematic diagram of the fixing block of the utility model. DETAILED DESCRIPTION

[0040] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0041] like Figures 1 to 6 As shown, a high-temperature tensile tool for bars is used to perform a tensile test on a sample 1, and comprises an upper fixture 100 for hooking one end of the sample 1 and a lower fixture 200 for hooking the other end of the sample 1, wherein the upper fixture 100 and the lower fixture 200 respectively comprise a main body 2, a left clamp 3, a right clamp 4 and a driving mechanism;

[0042] The left clamp 3 and the right clamp 4 are respectively slidably connected to the main body part 2;

[0043] The driving mechanism is connected to the main body part 2, and is also connected to the left clamp 3 and the right clamp 4 respectively and is used to drive the left clamp 3 and the right clamp 4 to move toward or away from each other to adjust the distance between the left clamp 3 and the right clamp 4;

[0044] The left clamp 3 is provided with a left hook 5 for hooking the end of the sample 1, and the right clamp 4 is provided with a right hook 6 for hooking the end of the sample 1; specifically, the upper clamp 100 includes a set of main body parts 2, left clamp 3, right clamp 4 and a driving mechanism, and the lower clamp 200 also includes a set of main body parts 2, left clamp 3, right clamp 4 and a driving mechanism. The main body parts 2 in the upper clamp 100 and the main body parts 2 in the lower clamp 200 are both installed on the high-temperature stretching machine, and one end of the sample 1 is hooked by the left hook 5 and the right hook 6 in the upper clamp 100, and the other end of the sample 1 is hooked by the left hook 5 and the right hook 6 in the lower clamp 200. Then, the high-temperature stretching machine drives the main body parts 2 in the upper clamp 100 and the main body parts 2 in the lower clamp 200 to separate from each other, and then stretch the sample 1 to both ends, so as to perform a tensile test on the sample 1. More specifically, the distance between the left chuck 3 and the right chuck 4 in the upper clamp 100 can be adjusted by the driving mechanism in the upper clamp 100, and the distance between the left chuck 3 and the right chuck 4 in the lower clamp 200 can be adjusted by the driving mechanism in the lower clamp 200, so that the left hook 5 and the right hook 6 can hook the ends of the specimens 1 of different diameters, so as to perform tensile tests on specimens 1 of various diameters, with a wider range of applications and more convenient use. In this embodiment, the specimen 1 is a cylindrical metal bar, and the two ends of the specimen 1 are respectively provided with bosses protruding radially outward, and the left hook 5 and the right hook 6 are used to hook the corresponding bosses. In this embodiment, the structure and size of the upper clamp 100 can be exactly the same as those of the lower clamp 200.

[0045] like Figures 2 to 7 As shown, the main body part 2 may be provided with a T-slot 7;

[0046] The left clamp 3 may be provided with a left T-shaped portion 8, and the left T-shaped portion 8 is slidably fitted in the T-shaped slot 7 so that the left clamp 3 is slidably connected to the main body component 2;

[0047] The right clamp 4 may be provided with a right T-shaped portion 9 , and the right T-shaped portion 9 is slidably fitted in the T-shaped slot 7 so that the right clamp 4 is slidably connected to the main body component 2 .

[0048] like Figures 1 to 5 As shown, the main body component 2 has a connecting screw portion 10 so that the main body component 2 can be installed on a high-temperature stretching machine through the connecting screw portion 10 .

[0049] like Figures 1 to 8 As shown, the driving mechanism is for example but not limited to the following structure, which includes a driving screw 11 and a fixing block 12;

[0050] The fixing block 12 is connected to the main body 2 and is located between the left clamp 3 and the right clamp 4. A slot 13 is provided in the fixing block 12.

[0051] The driving screw 11 has a left threaded portion 14, a right threaded portion 15 and a clamping portion 16;

[0052] The clamping portion 16 is located between the left threaded portion 14 and the right threaded portion 15, and the clamping portion 16 is engaged with the clamping groove 13 to limit the axial position of the driving screw 11 and prevent the driving screw 11 from moving along its own axial direction.

[0053] The left threaded portion 14 is threadedly connected to the left chuck 3, and the right threaded portion 15 is threadedly connected to the right chuck 4. The left threaded portion 14 and the right threaded portion 15 have opposite rotation directions, so that when the driving screw 11 is rotated, the left threaded portion 14 and the right threaded portion 15 can drive the left chuck 3 and the right chuck 4 to move toward or away from each other into position, thereby adjusting the distance between the left chuck 3 and the right chuck 4, so that the left hook 5 and the right hook 6 can hook the ends of the specimens 1 of different diameters, so as to perform tensile tests on specimens 1 of various diameters, and have a wider range of applications. In this embodiment, the diameter of the clamping portion 16 is smaller than the outer diameters of the left threaded portion 14 and the right threaded portion 15, and the fixing block 12 is fixedly connected to the main body component 2. Therefore, the clamping portion 16 is engaged in the clamping groove 13 to limit the axial position of the driving screw 11, preventing the driving screw 11 from moving along its own axial direction without affecting the rotation of the driving screw 11.

[0054] like Figure 5 , 6 As shown in , 8, the fixing block 12 has a main body 17, a left wing 18 and a right wing 19;

[0055] The left wing portion 18 and the right wing portion 19 are both connected to the main body component 2;

[0056] The main body 17 extends into the T-slot 7;

[0057] The card slot 13 is disposed in the body portion 17;

[0058] The left wing portion 18 and the right wing portion 19 are respectively provided with connection holes 20;

[0059] The main body part 2 is provided with bolt holes 21 which correspond to the connection holes 20 one by one and are aligned with the corresponding connection holes 20;

[0060] The left wing portion 18 and the right wing portion 19 are respectively connected to the main body component 2 by fastening bolts.

[0061] like Figures 3 to 7 As shown, the left clamp 3 is provided with a left threaded hole 22 which is matched and connected with the left threaded portion 14, and the left threaded hole 22 is provided in the left T-shaped portion 8;

[0062] The right clamp 4 is provided with a right threaded hole 23 which is matched with the right threaded portion 15 , and the right threaded hole 23 is provided in the right T-shaped portion 9 .

[0063] like Figures 2~6 As shown, a square rotating portion 24 is provided at one end of the driving screw 11 so that the entire driving screw 11 can be driven to rotate by rotating the square rotating portion 24 .

[0064] like Figure 5 , 8 As shown, the slot 13 is a U-shaped opening slot.

[0065] Specifically, the main body part 2 is provided with two through holes 25 intersecting in a cross shape;

[0066] One end portion of the left clamp 3 provided with the left hook portion 5 and one end portion of the right clamp 4 provided with the right hook portion 6 are respectively of a conical structure.

[0067] In summary, the upper fixture 100 includes a set of main body parts 2, left clamp 3, right clamp 4 and driving mechanism, and the lower fixture 200 also includes a set of main body parts 2, left clamp 3, right clamp 4 and driving mechanism. The main body parts 2 in the upper fixture 100 and the main body parts 2 in the lower fixture 200 are both installed on the high-temperature stretching machine, and one end of the sample 1 is hooked by the left hook 5 and the right hook 6 in the upper fixture 100, and the other end of the sample 1 is hooked by the left hook 5 and the right hook 6 in the lower fixture 200. Then, the high-temperature stretching machine drives the main body parts 2 in the upper fixture 100 and the main body parts 2 in the lower fixture 200 to separate from each other, and then stretch the sample 1 to both ends, so as to perform a tensile test on the sample 1. Furthermore, the distance between the left chuck 3 and the right chuck 4 in the upper clamp 100 can be adjusted by the driving mechanism in the upper clamp 100, and the distance between the left chuck 3 and the right chuck 4 in the lower clamp 200 can be adjusted by the driving mechanism in the lower clamp 200, so that the left hook 5 and the right hook 6 can hook the ends of the specimens 1 of different diameters, so as to perform tensile tests on the specimens 1 of various diameters, which has a wider range of applications and is more convenient to use.

[0068] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high temperature drawing tool for bars, characterized in that: It is used to perform a tensile test on a sample (1), and comprises an upper clamp (100) for hooking one end of the sample (1) and a lower clamp (200) for hooking the other end of the sample (1), wherein the upper clamp (100) and the lower clamp (200) respectively comprise a main body component (2), a left clamp (3), a right clamp (4) and a driving mechanism; The left clamp (3) and the right clamp (4) are respectively slidably connected to the main body component (2); The driving mechanism is connected to the main body component (2), and is also connected to the left clamp (3) and the right clamp (4) respectively, and is used to drive the left clamp (3) and the right clamp (4) to move towards or away from each other so as to adjust the distance between the left clamp (3) and the right clamp (4); The left clamp (3) is provided with a left hook (5) for hooking the end of the sample (1); The right clamp (4) is provided with a right hook portion (6) for hooking the end of the sample (1).

2. The high temperature drawing tool for bars according to claim 1, characterized in that: The main body component (2) is provided with a T-shaped groove (7); The left clamp (3) is provided with a left T-shaped portion (8), and the left T-shaped portion (8) is slidably fitted in the T-shaped groove (7) so that the left clamp (3) is slidably connected to the main body component (2); The right clamp (4) is provided with a right T-shaped portion (9), and the right T-shaped portion (9) is slidably fitted in the T-shaped groove (7), thereby enabling the right clamp (4) to be slidably connected to the main body component (2).

3. The high temperature drawing tool for bars according to claim 1, characterized in that: The main body component (2) is provided with a connecting screw portion (10).

4. The high temperature drawing tool for bars according to claim 1, characterized in that: The driving mechanism comprises a driving screw (11) and a fixing block (12); The fixing block (12) is connected to the main body component (2) and is located between the left clamp (3) and the right clamp (4); a clamping slot (13) is provided in the fixing block (12); The driving screw (11) comprises a left threaded portion (14), a right threaded portion (15) and a clamping portion (16); The clamping portion (16) is located between the left threaded portion (14) and the right threaded portion (15), and the clamping portion (16) is engaged and clamped in the clamping groove (13) so as to define the axial position of the driving screw rod (11); The left threaded portion (14) is threadedly connected to the left clamp (3), and the right threaded portion (15) is threadedly connected to the right clamp (4). The left threaded portion (14) and the right threaded portion (15) have opposite rotation directions.

5. The high temperature drawing tool for bars according to claim 4, characterized in that: The main body component (2) is provided with a T-shaped slot (7), the left chuck (3) is provided with a left T-shaped portion (8), the left T-shaped portion (8) is slidably fitted in the T-shaped slot (7), thereby enabling the left chuck (3) to be slidably connected to the main body component (2), and the right chuck (4) is provided with a right T-shaped portion (9), the right T-shaped portion (9) is slidably fitted in the T-shaped slot (7), thereby enabling the right chuck (4) to be slidably connected to the main body component (2); The fixing block (12) comprises a main body (17), a left wing (18) and a right wing (19); The left wing portion (18) and the right wing portion (19) are both connected to the main body component (2); The main body (17) extends into the T-shaped groove (7); The card slot (13) is arranged in the main body (17).

6. The high temperature drawing tool for bars according to claim 5, characterized in that: The left wing portion (18) and the right wing portion (19) are respectively provided with connection holes (20); The main body component (2) is provided with bolt holes (21) which correspond one-to-one with the connection holes (20) and are aligned with the corresponding connection holes (20); The left wing part (18) and the right wing part (19) are respectively connected to the main body part (2) by fastening bolts.

7. The high temperature drawing tool for bars according to claim 5, characterized in that: The left clamp (3) is provided with a left threaded hole (22) which is matched and connected with the left threaded portion (14); the left threaded hole (22) is provided in the left T-shaped portion (8); The right clamp (4) is provided with a right threaded hole (23) that cooperates with the right threaded portion (15), and the right threaded hole (23) is provided in the right T-shaped portion (9).

8. The high temperature drawing tool for bars according to claim 4, characterized in that: One end of the driving screw rod (11) is provided with a square rotating portion (24).

9. The high temperature drawing tool for bars according to claim 4, characterized in that: The clamping slot (13) is a U-shaped opening slot.

10. The high temperature drawing tool for bars according to claim 1, characterized in that: The main body component (2) is provided with two through holes (25) intersecting in a cross shape; An end portion of the left clamp (3) provided with the left hook portion (5) and an end portion of the right clamp (4) provided with the right hook portion (6) are both conical structures.

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