High-temperature thermoplasticity testing device for homogeneous alloy steel bar

Abstract

The invention relates to the technical field of thermoplasticity testing, and particularly discloses a homogeneous alloy steel bar high-temperature thermoplasticity testing device which comprises a machining platform, the bottom of the machining platform is fixedly connected with a device base, and the top of the machining platform is provided with a supporting assembly, a stretching assembly and a heating assembly. The supporting assembly comprises supports symmetrically and fixedly connected to the upper surface of the machining platform. The stretching assembly comprises movable platforms symmetrically and slidably connected between the two supports. The bottom of a workpiece is inserted into a bottom stretching assembly, a spring drives a clamping block to achieve primary clamping of the bottom of the workpiece, then an upper movable platform and a lower movable platform are controlled to move oppositely, the two ends of the workpiece are further clamped, and then a driving mechanism drives a second gear to rotate to drive a clamping base to clamp the workpiece. The hydraulic cylinder drives the movable block to rotate around the mounting shaft through the stretching mechanism, the workpiece clamping effect is enhanced, and therefore the clamping stability is guaranteed, the operation process is simplified, efficient and stable workpiece clamping is achieved, and accidental risks are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of thermoplastic testing, and in particular to a high-temperature thermoplastic testing device for homogeneous alloy steel bars. Background Art

[0002] As a kind of alloy steel material with uniform distribution of components and properties, thermoplastic testing is indispensable in hot working processes such as forging and rolling. Through thermoplastic testing, the deformation characteristics of materials at different temperatures can be deeply explored, and then the hot working parameters can be precisely controlled to optimize and improve the comprehensive mechanical properties such as material strength and toughness, effectively avoid forming defects such as cracks and folds, ensure the smooth progress of the processing and forming process, and improve production efficiency and product quality.

[0003] Currently, there are two main methods of thermoplastic testing: hot torsion and hot stretching. Both tests require reliable clamping of the workpiece to ensure the smooth progress of subsequent testing. Traditionally, a three-jaw chuck is used to clamp the rod-shaped workpiece. However, this clamping method is not only inconvenient to operate, but also difficult to ensure a stable clamping effect. Especially during hot stretching, due to the limited contact area between the jaws and the rod-shaped workpiece, it is very easy to cause the workpiece to be detached from the clamp, which will not only interfere with the accuracy of the test results, but may even cause test safety accidents in severe cases, posing a threat to the safety of test equipment and personnel.

[0004] Therefore, it is necessary to provide a high-temperature thermoplasticity testing device for homogeneous alloy steel bars to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a high-temperature thermoplasticity testing device for homogeneous alloy steel bars, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A high-temperature thermoplastic testing device for homogeneous alloy steel bars, comprising a processing platform, a device base is fixedly connected to the bottom of the processing platform, a support assembly, a stretching assembly and a heating assembly are arranged on the top of the processing platform, the support assembly comprises a bracket symmetrically fixedly connected to the upper surface of the processing platform, the stretching assembly comprises a movable platform symmetrically slidably connected between two brackets, a support frame is fixedly connected to one side of the two movable platforms away from each other, a hydraulic cylinder is fixedly connected to the upper surface of the support frame at the top, and a servo motor is fixedly connected to the lower surface of the hydraulic cylinder at the bottom, a stretching mechanism is arranged inside the movable platform, a same driving mechanism is arranged between the two stretching mechanisms, and a clamping mechanism is evenly arranged inside the stretching mechanism;

[0008] The stretching mechanism includes a movable seat slidably connected to the inside of the movable platform, the inside of the movable seat is rotatably connected to a fixed seat, the inside of the fixed seat is uniformly slidably connected to a connecting block, the outer sides of the connecting blocks are slidably connected to the same movable disk, the inside of the movable disk is fixedly connected to a fixed rod, and the fixed rod slides inside the connecting block;

[0009] The driving mechanism includes a toothed disc rotatably connected to the bottom surface of the fixed seat, and the stretching mechanism is slidably connected between the connecting block and the toothed disc;

[0010] The clamping mechanism includes a mounting seat fixedly connected to the connecting block, a movable block is slidably connected inside the mounting seat, one end of the movable block away from the connecting block is fixedly connected to the clamping seat, the clamping block is slidably connected inside the clamping seat, a spring is fixedly connected between the clamping block and the clamping seat, a one-way screw rod is rotatably connected inside the mounting seat, a gear 2 is fixedly connected to the outer side of the one-way screw rod, the gear 2 and the toothed disc are meshed with each other, and the mounting seat is rotatably connected to the inside of the fixed seat through a mounting shaft;

[0011] The movable disk at the top is fixedly connected to the telescopic end of the hydraulic cylinder through a coupling, and the movable disk at the bottom is fixedly connected to the output shaft of the servo motor 2 through a coupling.

[0012] As a further improvement of the above scheme, the support assembly also includes a servo motor fixedly connected to the bottom of the processing platform, the two brackets are rotatably connected to the inside of a bidirectional screw rod, the brackets are symmetrically slidably connected to the inside of a slide seat, a spiral pair transmission is formed between the slide seat and the bidirectional screw rod, the slide seat is fixedly connected to the movable platform through a fixed block, the two bidirectional screw rods are connected by a transmission belt, and the bottom of one of the bidirectional screw rods is fixedly connected to the output shaft of a servo motor through a coupling.

[0013] As a further improvement of the above solution, the heating assembly includes a mounting plate fixedly connected to two brackets, a connecting seat is fixedly connected to the outer side wall of the mounting plate, and a heating furnace is symmetrically rotatably connected to the outer side of the connecting seat.

[0014] As a further improvement of the above scheme, the driving mechanism includes a dual-axis motor fixedly connected to a mounting plate, mounting blocks are fixedly connected to the outer side walls of the movable platform, a sleeve rod is rotatably connected to the inside of the mounting block, a driving rod is slidably connected to the inside of the sleeve rod, the driving rod is fixedly connected to the output shaft of the dual-axis motor through a coupling, a gear 1 is fixedly connected to the top of the sleeve rod, and the gear 1 is meshed with the gear disk.

[0015] As a further improvement of the above solution, one end of the clamping block located inside the clamping seat is symmetrically fixedly connected to a limiting block, and the limiting blocks are slidably connected to the inside of the clamping seat.

[0016] As a further improvement of the above solution, the mounting seat is rotatably connected to the mounting shaft, and both ends of the mounting shaft are fixedly connected to the fixing seat.

[0017] As a further improvement of the above solution, a protrusion is fixedly connected to the outer side of the driving rod, and a sliding groove matched with the sleeve rod is formed on the inner wall of the sleeve rod.

[0018] As a further improvement of the above solution, a slide groove with a top inclined toward the center line of the movable disk is provided inside the connecting block, and the fixing rod is slidably connected in the slide groove.

[0019] As a further improvement of the above solution, the tops of the two brackets are fixedly connected to a same top plate, and a protective cover is fixedly connected between the top plate and the processing platform.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Insert the bottom of the workpiece into the bottom stretching assembly, use the spring to drive the clamping block to achieve the initial clamping of the bottom of the workpiece, then control the upper and lower movable platforms to move toward each other to achieve further clamping of both ends of the workpiece, and then drive the drive mechanism to drive gear 2 to rotate, driving the clamping seat to clamp the workpiece. During stretching, the hydraulic cylinder drives the movable block to rotate around the installation axis through the stretching mechanism to enhance the clamping effect of the workpiece, thereby ensuring the clamping stability and simplifying the operation process, achieving efficient and stable clamping of the workpiece and reducing the occurrence of unexpected risks.

[0022] 2. The relative displacement operation of the upper and lower movable platforms can ensure that the heating component is always located in the center of the stretching component, so as to adapt to workpieces of different lengths, enhance the overall applicability of the device, and provide effective support for both ends of the workpiece to help the workpiece achieve initial clamping. In addition, the workpiece is thermally twisted with the help of components, and the workpiece is thermally stretched with the help of hydraulic cylinders, ensuring that the entire device has good practicality and functionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2It is a schematic cross-sectional structure diagram of the present invention as a whole;

[0026] Figure 3 It is a schematic diagram of the structure of the stretching component and the heating component of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the stretching assembly of the present invention;

[0028] Figure 5 It is a partial structural schematic diagram of the heating assembly and the driving mechanism of the present invention;

[0029] Figure 6 It is a partial structural schematic diagram of the movable platform of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the stretching mechanism of the present invention;

[0031] Figure 8 It is a schematic diagram of the internal structure of the fixing seat of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0033] Fig.10 It is a schematic structural diagram of the support assembly of the present invention.

[0034] In the figure: 1, processing platform; 2, device base; 3, support assembly; 31, bracket; 32, top plate; 33, two-way screw; 34, slide seat; 35, fixed block; 36, servo motor 1; 37, transmission belt; 4, stretching assembly; 41, movable platform; 42, support frame; 43, hydraulic cylinder; 44, stretching mechanism; 441, movable seat; 442, fixed seat; 443, connecting block; 444, movable disk; 445, fixed rod; 45, driving mechanism; 451, double shaft Motor; 452, driving rod; 453, sleeve rod; 454, mounting block; 455, gear one; 456, toothed disc; 46, clamping mechanism; 461, movable block; 462, clamping seat; 463, mounting seat; 464, one-way screw; 465, gear two; 466, mounting shaft; 467, clamping block; 468, spring; 469, limit block; 47, servo motor two; 5, heating component; 51, mounting plate; 52, heating furnace; 53, protective cover; 54, connecting seat. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 10 As shown, the present invention provides an embodiment: a high-temperature thermoplastic testing device for homogeneous alloy steel bars, comprising a processing platform 1, the bottom of the processing platform 1 is fixedly connected to a device base 2, characterized in that: a support assembly 3, a stretching assembly 4 and a heating assembly 5 are arranged on the top of the processing platform 1, the support assembly 3 comprises a bracket 31 symmetrically fixedly connected to the upper surface of the processing platform 1, the stretching assembly 4 comprises a movable platform 41 symmetrically slidably connected between two brackets 31, a support frame 42 is fixedly connected to one side of the two movable platforms 41 away from each other, a hydraulic cylinder 43 is fixedly connected to the upper surface of the support frame 42 at the top, a servo motor 47 is fixedly connected to the lower surface of the hydraulic cylinder 43 at the bottom, a stretching mechanism 44 is arranged inside the movable platform 41, a same driving mechanism 45 is arranged between the two stretching mechanisms 44, and a clamping mechanism 46 is evenly arranged inside the stretching mechanism 44;

[0037] The stretching mechanism 44 includes a movable seat 441 slidably connected to the inside of the movable platform 41, the inside of the movable seat 441 is rotatably connected to a fixed seat 442, the inside of the fixed seat 442 is uniformly slidably connected to a connecting block 443, the outer side of the connecting block 443 is slidably connected to the same movable disk 444, the inside of the movable disk 444 is fixedly connected to a fixed rod 445, the fixed rod 445 slides inside the connecting block 443, the inside of the connecting block 443 is provided with a slide groove with the top inclined toward the center line of the movable disk 444, and the fixed rod 445 is slidably connected in the slide groove;

[0038] The driving mechanism 45 includes a toothed disc 456 rotatably connected to the bottom surface of the fixing seat 442, and the stretching mechanism 44 is slidably connected between the connecting block 443 and the toothed disc 456;

[0039] The clamping mechanism 46 includes a mounting seat 463 fixedly connected to the connecting block 443, a movable block 461 is slidably connected inside the mounting seat 463, a clamping seat 462 is fixedly connected to one end of the movable block 461 away from the connecting block 443, a clamping block 467 is slidably connected inside the clamping seat 462, a spring 468 is fixedly connected between the clamping block 467 and the clamping seat 462, a one-way screw rod 464 is rotatably connected inside the mounting seat 463, a spiral pair transmission is formed between 464 and 461, a gear 2 465 is fixedly connected to the outer side of the one-way screw rod 464, the gear 2 465 and the toothed disc 456 are meshed with each other, the mounting seat 463 is rotatably connected to the inside of the fixed seat 442 through the mounting shaft 466, the mounting seat 463 is rotatably connected to the mounting shaft 466, and both ends of the mounting shaft 466 are fixedly connected to the fixed seat 442;

[0040] The movable plate 444 at the top is fixedly connected to the telescopic end of the hydraulic cylinder 43 through a coupling, and the movable plate 444 at the bottom is fixedly connected to the output shaft of the servo motor 2 47 through a coupling.

[0041] In practical application, the embodiment of the present invention is as follows: Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, first, the operator accurately places the bottom of the workpiece into the bottom clamping mechanism 46, and with the help of the elastic effect of the spring 468, multiple clamping blocks 467 form a preliminary clamping on the workpiece, thereby pre-installing the workpiece and improving the applicability of the device;

[0042] like Figure 2 , Figure 3 and Figure 4 As shown, the operator then starts the support assembly 3, causing the two movable platforms 41 to move toward each other smoothly. During this process, the bottom clamping mechanism 46 pushes the workpiece so that it is smoothly embedded in the top clamping mechanism 46, thereby further firmly clamping the workpiece between the two fixed seats 442, thereby ensuring the stability and safety of the workpiece in subsequent operations;

[0043] like Figure 2 , Figure 6 , Figure 8 and Fig. 9 As shown, the operator further starts the driving mechanism 45, and with the help of the precise meshing transmission between the toothed disc 456 and the second gear 465, drives the one-way screw 464 to rotate stably, and the rotating one-way screw 464 pushes the movable block 461 to move toward the workpiece, and the movable block 461 drives the clamping block 467 through the clamping seat 462 to achieve strong clamping of the workpiece, ensuring the stability of the workpiece during the hot stretching and hot torsion process, effectively avoiding the slippage or loosening of the workpiece, and because the workpiece is in close contact with the two fixed seats 442, the clamping stability during the hot torsion process is improved, and the risk of accidents caused by torsional force is reduced, thereby ensuring the safety of the operator and the accuracy of the test data;

[0044] like Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, when the operator starts the hydraulic cylinder 43 to perform the hot stretching operation, the hydraulic cylinder 43 drives the top stretching mechanism 44 to move upward stably, and through the sliding connection between the fixed rod 445 and the connecting block 443, drives the connecting block 443 and the mounting seat 463 to rotate around the mounting axis 466. During the rotation, the movable block 461 and the clamping seat 462 move toward the workpiece, further enhancing the clamping stability of the workpiece during the stretching process, ensuring that the stretching force acts evenly and stably on the workpiece, and effectively improving the accuracy and reliability of the hot stretching test data.

[0045] like Figure 2 and Fig.10 As shown, the support assembly 3 also includes a servo motor 36 fixedly connected to the bottom of the processing platform 1, the two brackets 31 are rotatably connected to the inside of the two bidirectional screw rods 33, the brackets 31 are symmetrically slidably connected to the inside of the slide 34, a spiral pair transmission is formed between the slide 34 and the bidirectional screw rod 33, the slide 34 is fixedly connected to the movable platform 41 through a fixed block 35, the two bidirectional screw rods 33 are connected by a transmission belt 37, and the bottom of one of the bidirectional screw rods 33 is fixedly connected to the output shaft of the servo motor 36 through a coupling.

[0046] In actual application of the embodiment of the present invention, when it is necessary to adjust the position of the movable platform 41 to adapt to homogeneous alloy steel bars of different lengths, the servo motor 36 is started, and the output shaft of the servo motor 36 rotates, driving the bidirectional screw 33 connected thereto to rotate through the coupling, and with the help of the transmission action of the transmission belt 37, the bidirectional screws 33 in the two brackets 31 rotate synchronously. Due to the spiral pair transmission relationship between the slide 34 and the bidirectional screw 33, the slide 34 will slide symmetrically along the axial direction of the bidirectional screw 33 inside the bracket 31, and the slide 34 is fixedly connected to the movable platform 41 through the fixed block 35, so that the movable platform 41 moves with the movement of the slide 34, realizing the synchronous adjustment of the distance between the two movable platforms 41, ensuring the stability and stability of the movable platform 41 during the movement, and providing a stable clamping basis for the subsequent hot stretching or hot torsion test of the homogeneous alloy steel bar.

[0047] like Figures 2 to 5 As shown, the heating assembly 5 includes a mounting plate 51 fixedly connected to two brackets 31 , a connecting seat 54 is fixedly connected to the outer side wall of the mounting plate 51 , and a heating furnace 52 is symmetrically rotatably connected to the outer side of the connecting seat 54 .

[0048] When the embodiment of the present invention is actually used, the heating furnace 52 is started, which is firmly connected to the two brackets 31 through the connecting seat 54 and the mounting plate 51 to ensure the stability of the structure during the heating process. The symmetrically rotatably connected heating furnace 52 can conveniently place the workpiece without affecting the heating effect on the middle part of the workpiece.

[0049] like Figure 3 , Figure 4 , Figure 5 and Figure 8As shown, the driving mechanism 45 includes a dual-axis motor 451 fixedly connected to the mounting plate 51, and the outer side walls of the movable platform 41 are fixedly connected with mounting blocks 454, the inner part of the mounting block 454 is rotatably connected with a sleeve rod 453, the inner part of the sleeve rod 453 is slidably connected with a driving rod 452, the driving rod 452 is fixedly connected to the output shaft of the dual-axis motor 451 through a coupling, the gear 1 455 and the toothed disc 456 are meshed with each other, the outer side of the driving rod 452 is fixedly connected with a protrusion, and the inner wall of the sleeve rod 453 is provided with a sliding groove adapted to the sleeve rod 453.

[0050] When the embodiment of the present invention is used in practice, when it is necessary to drive the toothed disc 456 to rotate so as to drive the clamping mechanism 46 to clamp the homogeneous alloy steel bar, the dual-axis motor 451 is started, and the output shaft of the dual-axis motor 451 rotates, driving the driving rod 452 fixedly connected to it through the coupling to rotate. Since a protrusion is fixed on the outer side of the driving rod 452, and a sliding groove adapted to it is provided on the inner wall of the sleeve rod 453, during the rotation of the driving rod 452, the protrusion interacts with the sliding groove, so that the driving rod 452 can not only slide in the sleeve rod 453, but also drive the sleeve rod 453 to rotate inside the mounting block 454. The rotation of the sleeve rod 453 drives the gear 1 455 fixedly connected to it to rotate, and the meshing transmission of the gear 1 455 and the toothed disc 456 realizes the stable rotation of the toothed disc 456, so as to control the clamping force and release action of the clamping mechanism 46 on the bar, thereby improving the reliability and stability of the clamping operation of the homogeneous alloy steel bar.

[0051] like Fig. 9 As shown, one end of the clamping block 467 located inside the clamping seat 462 is symmetrically fixedly connected to the limiting block 469, and the limiting blocks 469 are slidably connected to the inside of the clamping seat 462.

[0052] In actual application of the embodiment of the present invention, when the clamping block 467 performs preliminary clamping of the homogeneous alloy steel bar under the action of the spring 468 or further clamps it under the action of the driving mechanism 45, the symmetrically arranged limit blocks 469 effectively limit the displacement range of the clamping block 467, preventing the clamping block 467 from detaching from the clamping seat 462 due to excessive displacement, thereby ensuring the integrity and reliability of the clamping structure.

[0053] like Figure 1 and Figure 2 As shown, the tops of the two brackets 31 are fixedly connected to a same top plate 32 , and a protective cover 53 is fixedly connected between the top plate 32 and the processing platform 1 .

[0054] When the embodiment of the present invention is actually used, the shield 53 installed on the top plate 32 can protect the driving mechanism 45 and the back of the heating component 5 to ensure safety during the test.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature thermoplasticity testing device for homogeneous alloy steel bars, comprising a processing platform (1), the bottom of which is fixedly connected to a device base (2), characterized in that: The top of the processing platform (1) is provided with a support assembly (3), a stretching assembly (4) and a heating assembly (5); the support assembly (3) includes a bracket (31) symmetrically fixedly connected to the upper surface of the processing platform (1); the stretching assembly (4) includes a movable platform (41) symmetrically slidably connected between two brackets (31); the two movable platforms (41) are fixedly connected to a support frame (42) on one side away from each other; the upper surface of the support frame (42) at the top is fixedly connected to a hydraulic cylinder (43); the lower surface of the hydraulic cylinder (43) at the bottom is fixedly connected to a servo motor (47); the movable platforms (41) are each provided with a stretching mechanism (44) inside; the same driving mechanism (45) is provided between the two stretching mechanisms (44); and the inside of the stretching mechanism (44) is evenly provided with a clamping mechanism (46); The stretching mechanism (44) comprises a movable seat (441) slidably connected to the inside of the movable platform (41); the movable seat (441) is rotatably connected to a fixed seat (442); the fixed seat (442) is evenly slidably connected to a connecting block (443); the outer side of the connecting block (443) is slidably connected to the same movable disk (444); the inside of the movable disk (444) is fixedly connected to a fixing rod (445); the fixing rod (445) slides inside the connecting block (443); The driving mechanism (45) includes a toothed disc (456) rotatably connected to the bottom surface of the fixing seat (442), and the stretching mechanism (44) is slidably connected between the connecting block (443) and the toothed disc (456); The clamping mechanism (46) comprises a mounting seat (463) fixedly connected to the connecting block (443); a movable block (461) is slidably connected inside the mounting seat (463); one end of the movable block (461) away from the connecting block (443) is fixedly connected to a clamping seat (462); a clamping block (467) is slidably connected inside the clamping seat (462); a spring (468) is fixedly connected between the clamping block (467) and the clamping seat (462); a one-way screw rod (464) is rotatably connected inside the mounting seat (463); a gear 2 (465) is fixedly connected to the outer side of the one-way screw rod (464); the gear 2 (465) and the toothed disc (456) are meshed with each other; the mounting seat (463) is rotatably connected to the inside of the fixed seat (442) via a mounting shaft (466); The movable disk (444) at the top is fixedly connected to the telescopic end of the hydraulic cylinder (43) through a coupling, and the movable disk (444) at the bottom is fixedly connected to the output shaft of the second servo motor (47) through a coupling.

2. The high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 1, characterized in that: The support assembly (3) also includes a servo motor (36) fixedly connected to the bottom of the processing platform (1); the two brackets (31) are both rotatably connected to a bidirectional screw rod (33); the brackets (31) are symmetrically slidably connected to a slide seat (34); a spiral pair transmission is formed between the slide seat (34) and the bidirectional screw rod (33); the slide seat (34) is fixedly connected to the movable platform (41) through a fixed block (35); the two bidirectional screw rods (33) are connected to each other through a transmission belt (37); the bottom of one of the bidirectional screw rods (33) is fixedly connected to the output shaft of the servo motor (36) through a coupling.

3. A high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 2, characterized in that: The heating assembly (5) comprises a mounting plate (51) fixedly connected to two brackets (31), a connecting seat (54) fixedly connected to the outer side wall of the mounting plate (51), and a heating furnace (52) symmetrically rotatably connected to the outer side of the connecting seat (54).

4. A high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 3, characterized in that: The driving mechanism (45) comprises a dual-axis motor (451) fixedly connected to a mounting plate (51); a mounting block (454) is fixedly connected to the outer side wall of the movable platform (41); a sleeve rod (453) is rotatably connected inside the mounting block (454); a driving rod (452) is slidably connected inside the sleeve rod (453); the driving rod (452) is fixedly connected to the output shaft of the dual-axis motor (451) via a coupling; a gear 1 (455) is fixedly connected to the top of the sleeve rod (453); and the gear 1 (455) and the toothed disc (456) are meshed with each other.

5. The high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 2, characterized in that: One end of the clamping block (467) located inside the clamping seat (462) is symmetrically fixedly connected to the limiting block (469), and the limiting blocks (469) are slidably connected to the inside of the clamping seat (462).

6. A high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 2, characterized in that: The mounting seat (463) is rotatably connected to the mounting shaft (466), and both ends of the mounting shaft (466) are fixedly connected to the fixing seat (442).

7. The high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 4, characterized in that: A protrusion is fixedly connected to the outer side of the driving rod (452), and a sliding groove matching the sleeve rod (453) is formed on the inner wall of the sleeve rod (453).

8. The high temperature thermoplasticity testing device for homogeneous alloy steel bars according to claim 3, characterized in that: The connection block (443) is provided with a slide groove with its top inclined toward the center line of the movable disk (444), and the fixing rod (445) is slidably connected in the slide groove.

9. A homogeneous alloy steel bar high temperature thermoplasticity testing device according to claim 3, characterized in that: The tops of the two brackets (31) are fixedly connected to a same top plate (32), and a protective cover (53) is fixedly connected between the top plate (32) and the processing platform (1).

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