Thermal simulation high-temperature thermoplastic sample easy to process and convenient to use

Abstract

The utility model discloses a thermal simulation high-temperature thermoplastic sample easy to process and convenient to use, belongs to the technical field of steel performance detection samples, and is used for conveniently manufacturing samples and testing. According to the technical scheme, a sample is composed of a cylinder and clamping heads, the two clamping heads are connected with the cylinder into a whole at the two ends of the cylinder, the two sample clamping blocks are connected with thermal simulation clamp jaws at the two ends of a thermal simulation sample clamp in a clamped mode respectively, and round holes are formed in the centers of the two sample clamping blocks. Two ends of a cylinder in the middle of the sample are respectively embedded in central round holes of the two sample clamping blocks; and two ends of the two sample clamping block locking devices are respectively connected with the outer end surfaces of the two sample clamping blocks and the surface of the thermal simulation sample clamp base in a propping manner. The device is simple in structure, easy to process and convenient to use, simplifies the processing procedure of the sample, greatly shortens the processing time of the sample, improves the processing efficiency of the sample, reduces the processing cost, and provides favorable conditions for realizing batch high-temperature thermoplasticity tests.

Description

Technical Field

[0001] The utility model relates to a high-temperature thermoplastic test specimen for a thermal simulation high-temperature thermoplastic test, belonging to the technical field of steel performance detection specimens. Background Art

[0002] Thermal simulation high-temperature thermoplasticity test has been widely used in various steel materials. The most commonly used method is to measure the cross-sectional area of ​​the high-temperature tensile fracture of the specimen through high-temperature tensile thermoplasticity test, and calculate the cross-sectional shrinkage rate to characterize the high-temperature thermoplasticity of the test specimen. The specimens currently used in high-temperature thermoplasticity test are mainly cylindrical specimens with a diameter of 10mm and a length of 120mm, with 15mm threads turned at both ends of the specimen. Since each high-temperature thermoplasticity curve drawn in the high-temperature thermoplasticity test requires multiple specimens, usually no less than 10, for testing multiple temperature points. In the past, the specimens used in high-temperature thermoplasticity tests needed to be assembled by turning the main body, turning the threads, and the screw blades, and the thread size must match the screw blade size before they can be used on the machine. Due to the different thread turning methods for the specimen body and the two ends of the specimen, two different cutter heads are required. Thread turning is the most difficult, especially when processing specimens made of harder materials. It is difficult to control the thread size accuracy, and the thread cutter head is severely worn. Sometimes a new cutter head needs to be replaced every time 1 to 2 hard specimens are processed, which not only causes a waste of resources, but also seriously affects the efficiency of specimen processing.

[0003] The processing of existing test specimens requires a lot of manpower and time, which seriously restricts the application of thermal simulation high-temperature thermoplasticity testing. Therefore, it is very necessary to improve the existing test specimens. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a thermal simulation high-temperature thermoplastic specimen that is easy to process and convenient to use. This specimen can simplify the specimen processing process, save the loss of the specimen processing tool head, save the specimen processing time, improve the specimen processing efficiency, and is easy to install and use, which can ensure the test operability and the accuracy of the test results and ensure the stable operation of the test.

[0005] The technical solution to the above technical problems is:

[0006] The invention relates to a thermal simulation high-temperature thermoplastic specimen that is easy to process and easy to use. The invention comprises a specimen, a specimen clamp and a specimen clamp locking device. The specimen consists of a cylinder and a clamp. The diameter of the cylinder is equal to the specimen diameter required for the test. The clamp is a rectangular parallelepiped. The cross-section of the clamp rectangular parallelepiped perpendicular to the length direction of the cylinder is a square. The side length of the square is greater than the diameter of the specimen cylinder. The two clamps are connected to the cylinder as a whole at both ends of the cylinder. There are two specimen clamps, and the two specimen clamps are respectively clamped and connected to the thermal simulation clamp jaws at both ends of a thermal simulation specimen fixture. There are circular holes in the centers of the two specimen clamps. The two ends of the cylinder in the middle of the specimen are respectively embedded in the central circular holes of the two specimen clamps. The clamps at both ends of the specimen are respectively located at the outer end surfaces of the two specimen clamps and clamped with the specimen clamps. The two specimen clamp locking devices are respectively placed at the outer ends of the two specimen clamps. The two ends of the two specimen clamp locking devices are respectively tightly connected to the outer end surfaces of the two specimen clamps and the surface of the base of the thermal simulation specimen fixture.

[0007] The above-mentioned thermal simulation high-temperature thermoplastic specimen is easy to process and easy to use. The two specimen clamps are respectively long trapezoidal blocks. The inclination angles of the two trapezoidal inclined surfaces of the long trapezoidal block match the inclined surfaces of the jaws of the thermal simulation specimen fixture. The side length of the upper bottom surface of the long trapezoidal block is less than the side length of the lower bottom surface. The side length of the upper bottom surface matches the opening length of the jaws of the thermal simulation specimen fixture. The two specimen clamps are respectively placed in the jaws of the thermal simulation specimen fixture at both ends. The upper bottom surfaces of the trapezoidal blocks of the two specimen clamps are respectively flush with the open ends of the two thermal simulation specimen fixture jaws, and the two trapezoidal inclined surfaces of the two specimen clamps are respectively connected to the inclined surfaces of the two thermal simulation specimen fixture jaws.

[0008] The above-mentioned thermal simulation high-temperature thermoplastic specimen is easy to process and convenient to use. The long trapezoidal blocks of the two specimen clamps are split in the middle to form two opposite right-angled trapezoidal blocks. The centers of the relative vertical surfaces of the two right-angled trapezoidal blocks are respectively provided with semicircular slots. The two semicircular slots are opposite to form a circular hole of the specimen clamp. The diameter of the circular hole matches the diameter of the specimen cylinder. The specimen cylinder is placed in the two semicircular slots and is clamped by the two right-angled trapezoidal blocks of the specimen clamp.

[0009] The above-mentioned thermal simulation high-temperature thermoplastic specimen is easy to process and easy to use. The specimen clamp locking device consists of a U-shaped plate, a tightening screw and a locking cap. There is a screw hole in the center of the U-shaped plate. The thread of the tightening screw matches the screw hole of the U-shaped plate. The lower end of the tightening screw is connected to the screw hole of the U-shaped plate. The upper end of the tightening screw is welded with a locking cap. The lower ends of the side plates at both ends of the U-shaped plate of the specimen clamp locking device are respectively pressed against the lower bottom surface of the trapezoidal block of the specimen clamp, and the locking cap at the upper end of the tightening screw is pressed against the surface of the base of the thermal simulation specimen fixture.

[0010] The beneficial effects of the utility model are:

[0011] The specimen of the utility model is composed of a cylinder and clamps at both ends, which omits the thread processing process at both ends of the specimen and saves the processing cost of turning the thread; the specimen is fixed by a trapezoidal specimen clamp, the specimen clamp is easy to manufacture, avoids the problem of mismatch between the screw and the thread size, and omits the assembly process of the screw and the thread; the specimen clamp locking device adopts a screw rod for tightening, which is easy to operate and firmly tightened.

[0012] The utility model has a simple structure, is easy to process and is convenient to use, simplifies the processing method of high-temperature thermoplastic specimens, simplifies the processing procedures, greatly shortens the processing time of the specimens, improves the specimen processing efficiency, reduces the processing cost, and provides favorable conditions for realizing batch high-temperature thermoplastic tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 is a schematic diagram of the structure of the specimen;

[0015] Figure 3 、 4 5 are the main view, left view and right view of the specimen holder;

[0016] Figure 6 、 7 8 are the front view, left view and right view of the specimen clamp locking device.

[0017] The markings in the figure are as follows: thermal simulation specimen clamp jaw 1, thermal simulation specimen clamp base 2, specimen 3, specimen clamp block 4, specimen clamp block locking device 5, cylinder 6, clamp head 7, semicircular slot 8, U-shaped plate 9, tightening screw 10, and locking cap 11. DETAILED DESCRIPTION

[0018] The utility model is composed of a sample 3, a sample clamping block 4, and a sample clamping block locking device 5.

[0019] Figure 1 、 2 The sample 3 is shown as consisting of a cylinder 6 and a clamp 7. The diameter of the cylinder 6 is equal to the required specimen diameter. The clamp 7 is a rectangular parallelepiped. The cross-section of the clamp 7 perpendicular to the length of the cylinder 6 is square, with a side length greater than the diameter of the cylinder 6 of the sample 3. The two clamps 7 are integrally connected to the cylinder 6 at each end. This sample 3 is easy to machine. A square-cross-section rod can be machined on a lathe by cutting the middle portion of the rod into a cylindrical shape. This is the simplest machining process in lathe machining.

[0020] Figure 1 、 3, 4, and 5 show that there are two sample clamps 4, and the two sample clamps 4 are respectively long trapezoidal blocks. The inclination angles of the two trapezoidal inclined surfaces of the long trapezoidal blocks match the inclined surfaces of the thermal simulation sample fixture jaws 1, the side length of the upper bottom surface of the long trapezoidal blocks is smaller than the side length of the lower bottom surface, and the side length of the upper bottom surface matches the opening length of the thermal simulation sample fixture jaws 1. The two sample clamps 4 are respectively placed in the thermal simulation sample fixture jaws 1 at both ends, and the upper bottom surfaces of the trapezoidal blocks of the two sample clamps 4 are flush with the open ends of the thermal simulation sample fixture jaws 1, and the two trapezoidal inclined surfaces of the two sample clamps 4 are respectively connected to the inclined surfaces of the thermal simulation sample fixture jaws 1.

[0021] Figure 1 、 3 Figures 4 and 5 show that the specimen clamp 4 utilizes a split structure. The long trapezoidal blocks of the two specimen clamps 4 are split in the middle to form two opposing right-angled trapezoidal blocks. Semicircular slots 8 are located at the centers of the vertical surfaces of the two right-angled trapezoidal blocks. These two semicircular slots 8 form the circular hole of the specimen clamp 4. The diameter of the circular hole matches the diameter of the cylindrical body 6 of the specimen 3. The cylindrical body 6 of the specimen 3 is placed in the two semicircular slots 8 and clamped by the two right-angled trapezoidal blocks of the specimen clamp 4. This split structure of the specimen clamp 4 makes it very convenient to install the specimen 3.

[0022] Figure 1 、 6 Figures 7 and 8 show that the two specimen clamp locking devices 5 are respectively placed between the outer ends of the two specimen clamps 4 and the surface of the thermal simulation specimen fixture base 2. The specimen clamp locking device 5 consists of a U-shaped plate 9, a tightening screw 10, and a locking cap 11. The center of the U-shaped plate 9 has a screw hole. The thread of the tightening screw 10 matches the screw hole of the U-shaped plate 9. The lower end of the tightening screw 10 is connected to the screw hole of the U-shaped plate 9, and the upper end of the tightening screw 10 is welded to the locking cap 11. The lower ends of the side plates at both ends of the U-shaped plate 9 of the specimen clamp locking device 5 respectively press against the lower bottom surface of the trapezoidal block of the specimen clamp 4, and the locking cap 11 at the upper end of the tightening screw 10 presses against the surface of the thermal simulation specimen fixture base 2.

[0023] The production and use process of this utility model is as follows:

[0024] First, prepare Sample 3. Use a band saw to cut the test steel ingot into a 150 mm × 13 mm × 13 mm rectangular parallelepiped. When cutting and sampling, avoid areas with defects such as central segregation, shrinkage cavities, and triangular cracks. Turn the rectangular parallelepiped on a lathe, clamping it at one end. Starting 10 mm from the other end, turn the cylindrical body 6 of Sample 3. Cylinder 6 has a diameter of 10 mm and a length of 90 mm. Use a band saw or a cutting saw to cut off 40 mm of the rectangular parallelepiped at the clamping end of the lathe. After this processing, a rectangular clamp 7 with two ends measuring 10 mm × 13 mm × 13 mm is obtained.

[0025] Then, a conventional thermocouple welding machine was used to weld the high-temperature thermocouple to the sample 3.

[0026] Then, the two right-angled trapezoidal blocks of the sample clamp 4 clamp the sample 3 , aligning the semicircular slots 8 of the two right-angled trapezoidal blocks with the cylinder 6 of the sample 3 , and the outer ends of the two sample clamps 4 contact the rectangular parallelepiped clamp 7 of the sample 3 .

[0027] Then, place the sample 3 and the sample clamp 4 together into the jaws 1 of the thermal simulation specimen clamp of the thermal simulation test machine, place the sample clamp locking devices 5 at the outer ends of the two sample clamps 4, turn the locking cap 11, and tighten the screw 10 to lock the sample clamp 4 to the thermal simulator.

[0028] Finally, the thermal simulation high temperature thermoplastic test begins.

[0029] An embodiment of the present invention is as follows:

[0030] The diameter of the cylinder 6 of the sample 3 is 10 mm ± 0.1 mm, the length is 90 mm ± 0.9 mm, the length of the clamp 7 is 10 mm, the width is 13 mm, and the height is 13 mm;

[0031] The length of the lower base of the trapezoid of the sample clamp 4 is 45 mm, the length of the upper base of the trapezoid is 40 mm, the height of the trapezoid is 35 mm, the thickness is 40 mm, and the diameter of the semicircular slot 8 is 10 mm;

[0032] The height of the two side plates of the U-shaped plate 9 of the specimen clamp locking device 5 is 35 mm, the width is 40 mm, the length of the top plate is 85 mm, the diameter of the screw hole of the top plate is 10 mm, the diameter of the tightening screw 10 is 10 mm, the length is 20 mm, and the diameter of the locking cap 11 is 35 mm and the thickness is 10 mm.

Claims

1. A thermal simulation high-temperature thermoplastic specimen that is easy to process and use, characterized by: It includes a specimen (3), a specimen clamp (4), and a specimen clamp locking device (5). The specimen (3) is composed of a cylinder (6) and a clamp (7). The diameter of the cylinder (6) is equal to the specimen diameter required for the test. The clamp (7) is a rectangular parallelepiped. The cross section of the rectangular parallelepiped of the clamp (7) perpendicular to the length direction of the cylinder (6) is a square. The side length of the square is greater than the diameter of the cylinder (6) of the specimen (3). Two clamps (7) are connected to the cylinder (6) at both ends of the cylinder (6) as a whole. There are two specimen clamps (4). The two specimen clamps (4) are respectively connected to the thermal simulation specimen fixture. The thermal simulation fixture jaws (1) at both ends are clamped and connected, the centers of the two sample clamps (4) have circular holes, the ends of the middle cylinder (6) of the sample (3) are respectively embedded in the central circular holes of the two sample clamps (4), the clamp heads (7) at both ends of the sample (3) are respectively located on the outer end surfaces of the two sample clamps (4) and clamped with the sample clamps (4), the two sample clamp locking devices (5) are respectively placed on the outer ends of the two sample clamps (4), and the two ends of the two sample clamp locking devices (5) are respectively tightly connected with the outer end surfaces of the two sample clamps (4) and the surface of the thermal simulation sample clamp base (2).

2. The thermal simulation high-temperature thermoplastic specimen that is easy to process and convenient to use according to claim 1 is characterized in that: The two sample clamps (4) are respectively long trapezoidal blocks, the inclination angles of the two trapezoidal inclined surfaces of the long trapezoidal blocks match the inclined surfaces of the thermal simulation sample clamp jaws (1), the side length of the upper bottom surface of the long trapezoidal block is less than the side length of the lower bottom surface, and the side length of the upper bottom surface matches the opening length of the thermal simulation sample clamp jaws (1), the two sample clamps (4) are respectively placed in the thermal simulation sample clamp jaws (1) at both ends, the upper bottom surfaces of the trapezoidal blocks of the two sample clamps (4) are respectively flush with the open ends of the two thermal simulation sample clamp jaws (1), and the two trapezoidal inclined surfaces of the two sample clamps (4) are respectively closely connected to the inclined surfaces of the two thermal simulation sample clamp jaws (1).

3. The thermal simulation high-temperature thermoplastic specimen that is easy to process and convenient to use according to claim 2 is characterized in that: The middle of the long trapezoidal blocks of the two sample clamps (4) are split into two opposite right-angled trapezoidal blocks, and the centers of the relative vertical surfaces of the two right-angled trapezoidal blocks are respectively provided with semicircular slots (8). The two semicircular slots (8) relatively form the circular hole of the sample clamp (4), and the diameter of the circular hole matches the diameter of the cylinder (6) of the sample (3). The cylinder (6) of the sample (3) is placed in the two semicircular slots (8) and is clamped by the two right-angled trapezoidal blocks of the sample clamp (4).

4. The thermal simulation high-temperature thermoplastic specimen that is easy to process and convenient to use according to claim 3 is characterized in that: The specimen clamp locking device (5) is composed of a U-shaped plate (9), a tightening screw (10) and a locking cap (11). The center of the U-shaped plate (9) has a screw hole. The thread of the tightening screw (10) matches the screw hole of the U-shaped plate (9). The lower end of the tightening screw (10) is connected to the screw hole of the U-shaped plate (9). The upper end of the tightening screw (10) is welded with a locking cap (11). The lower ends of the side plates at both ends of the U-shaped plate (9) of the specimen clamp locking device (5) are respectively pressed against the lower bottom surface of the trapezoidal block of the specimen clamp (4), and the locking cap (11) at the upper end of the tightening screw (10) is pressed against the surface of the base (2) of the thermal simulation specimen fixture.

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