An integrated torsion tensile testing machine

Abstract

This invention discloses an integrated torsion and tensile testing machine, comprising a support frame. A clamping and fixing head is installed on one side of the support frame, and a power clamping device is fixedly installed on the other side of the support frame. A power drive mechanism is installed on the other side of the power clamping device, driving the power clamping device to rotate. Two sets of clamping mechanisms are installed in the clamping cavity, and the two sets of clamping mechanisms are staggered and distributed in the clamping cavity, with different clamping points in the length direction. This invention integrates torsion and tensile testing structures into one, simplifying the structure, significantly reducing the size and weight of the equipment, improving mobility and applicability. Furthermore, the fixing points of the clamping mechanisms on the workpiece can be easily changed by simply adjusting the power drive mechanism. The operation is simple and requires no additional tools, eliminating the need for manual disassembly and assembly, greatly shortening the preparation and replacement time for the test, and making the testing process more efficient and smooth.

Description

Technical Field

[0001] This invention relates to a testing machine, specifically an integrated torsional tensile testing machine. Background Technology

[0002] With the development of industrial manufacturing, the accurate evaluation of the mechanical properties of workpieces has become particularly important. Therefore, torsion and tensile testing machines have emerged as the primary tools for evaluating the mechanical properties of workpieces. Although integrated torsion and tensile testing machines exist on the market, these machines often have the following technical shortcomings:

[0003] Existing integrated testing machines require separate tensile and torsion mechanisms. When simultaneous tensile and torsion tests are required, a more complex structure must be configured, which not only increases the complexity of the equipment but may also affect the accuracy of the tests.

[0004] Traditional testing machines use a fixed clamping point on the workpiece during testing. Therefore, the entire testing process is based on this same clamping point, which presents the following problems:

[0005] The torsional and tensile responses of a workpiece may differ at different length positions, and testing at only one fixed point may result in the actual torsional and tensile responses at some critical locations being ignored.

[0006] Repeated tests at the same clamping point may cause excessive fatigue at that point, thus affecting the accuracy of the test.

[0007] When the above problems are recognized, traditional methods require operators to manually disassemble the workpiece and reinstall it at a new clamping point. Manual disassembly and reinstallation has the following problems:

[0008] Frequent manual disassembly and clamping increases test time; manual reinstallation of workpieces may lead to inaccurate or unstable installation, thus affecting test results; frequent manual operation may cause additional wear on clamping structures and workpieces; and frequent interaction with large equipment may pose operational safety risks.

[0009] Therefore, current integrated torsion tensile testing machines have many shortcomings in design and function, and need to be further improved and innovated to meet the stringent requirements of modern industrial manufacturing for evaluating the mechanical properties of workpieces. Summary of the Invention

[0010] To address the aforementioned issues, this invention provides an integrated torsion and tensile testing machine that combines torsion and tensile testing structures into one unit, simplifying the structure. Furthermore, by simply rotating the power drive mechanism and controlling the magnetic drive plate to different positions within the linkage drive mechanism, the clamping point of the clamping mechanism on the workpiece can be switched, eliminating the need for manual disassembly and assembly, thus effectively overcoming the shortcomings of existing technologies.

[0011] This invention is achieved through the following technical solution: an integrated torsional tensile testing machine, comprising:

[0012] A bracket is provided, with a clamping head installed on one side of the bracket and a power clamping device fixedly installed on the other side of the bracket. A power drive mechanism is installed on the other side of the power clamping device, which drives the power clamping device to rotate. One end of the workpiece to be tested is clamped and fixed in the clamping head, and the other end is clamped and fixed in the power clamping device.

[0013] The power clamping device includes a fixed support base and a power clamping head rotatably installed in the fixed support base. The power clamping head has a clamping cavity on the side opposite to the clamping fixed head. Two sets of clamping mechanisms are installed in the clamping cavity. The two sets of clamping mechanisms are distributed in a staggered manner in the clamping cavity. The two sets of clamping mechanisms have clamping points in different length directions in the clamping cavity.

[0014] It also includes two sets of linkage drive mechanisms, which are arranged in a circumferentially staggered manner on one end face of the power clamping head, with each set of linkage drive mechanisms corresponding to a clamping mechanism.

[0015] The power drive mechanism includes a drive motor, and a power drive head is rotatably mounted on the power output end of the drive motor. The power drive head is provided with magnetic drive plates at the positions corresponding to the two sets of linkage drive mechanisms. When the magnetic drive plates rotate and correspond to different sets of linkage drive mechanisms, they are used to drive different clamping mechanisms to clamp the workpiece to be tested in different length directions. When the magnetic drive plates are not magnetically attracted and fixed to any set of linkage drive mechanisms, both sets of clamping mechanisms are in a loose state relative to the workpiece.

[0016] As a preferred technical solution, the linkage drive mechanism includes a first linkage drive mechanism and a second linkage drive mechanism. Both the first linkage drive mechanism and the second linkage drive mechanism include at least two sets of electromagnets. A pressure drive plate protruding from the surface of the electromagnet is installed between the two sets of electromagnets. The pressure drive plate is installed in the mounting groove opened in the power clamping head. A first ejection spring is installed in the mounting groove, and the pressure drive plate is ejected by the first ejection spring.

[0017] Each pressure drive plate has a drive portion at its bottom, and each drive portion has a corresponding contact portion of the clamping mechanism at its bottom. The drive portion has a first inclined contact surface on the side opposite to the contact portion, and the contact portion has a second inclined contact surface at the position corresponding to the first inclined contact surface. When the magnetic drive plate is magnetically attracted to the electromagnet, the magnetic drive plate pushes the pressure drive plate, which in turn pushes the contact portion of the clamping mechanism, causing the clamping mechanism to perform a clamping and pressing action relative to the workpiece.

[0018] As a preferred technical solution, the first linkage drive mechanism includes three first pressure drive plates, which are arranged in a circle on one end face of the power clamping head, and the included angle between the three first pressure drive plates is 120 degrees.

[0019] The second linkage drive mechanism includes three second pressure drive plates. The included angle between the three second pressure drive plates is 120 degrees and they are staggered from the three first pressure drive plates. The included angle between the first pressure drive plate and the second pressure drive plate on the adjacent side is 60 degrees.

[0020] As a preferred technical solution, a sliding bearing is installed inside the fixed support base, and the power clamping head is rotatably installed inside the sliding bearing. The power clamping head is provided with a first end panel and a second end panel with an outer diameter larger than the power clamping head. An annular cavity is formed between the first end panel and the second end panel. Two sets of linkage drive mechanisms are installed on the end face of the first end panel. The first end panel is located on the side close to the power drive mechanism, and the first end panel and the second end panel are located outside the clamping cavity.

[0021] As a preferred technical solution, both sets of clamping mechanisms include three first clamping plates and three second clamping plates. Each clamping plate is movably disposed in a clamping mounting groove opened on the inner wall of the clamping cavity, and each clamping plate is provided with a contact part.

[0022] Each of the three first clamping plates corresponds to one of the three first pressure driving plates, and each of the three second clamping plates corresponds to one of the three second pressure driving plates. The three first clamping plates are arranged in a 120-degree circle with each other. The three second clamping plates are arranged in a staggered circle with the first clamping plates, and each of the three second clamping plates is arranged in a 120-degree circle with each other. Adjacent first and second clamping plates are at a 60-degree angle with each other. The three first clamping plates are located at the rear end of the three second clamping plates. The three first and three second clamping plates have clamping points in different length directions within the clamping cavity. The different sets of linkage driving mechanisms are driven to perform clamping actions by magnetic driving plates adsorbing and fixing different sets of linkage driving mechanisms.

[0023] As a preferred technical solution, multiple connecting rods are fixedly installed on the power drive head, and the other end of the connecting rod is movably installed on a connecting plate. One side of the connecting plate is fixedly connected to the motor shaft of the drive motor. The bottom of the drive motor is fixed on the motor base, and the bottom of the base is fixed on the bracket. A movable groove is provided on the outer circular surface of the connecting plate corresponding to each connecting rod. The connecting rod is movably fastened in the movable groove. Sliding grooves are provided on both sides of the movable groove. A slider is provided on each connecting rod corresponding to the position of the sliding groove. The slider is slidably installed in the sliding groove, and a second ejection spring is installed in each sliding groove. The second ejection spring pushes the slider and ejects the connecting rod and the power drive head, so that the magnetic drive plate on the power drive head does not contact the pressure drive plate in the linkage drive mechanism.

[0024] When the electromagnet in the linkage drive mechanism is energized and generates magnetic force, the electromagnet attracts the magnetic drive plate, causing the power drive head and connecting rod to move towards the connecting plate. At this time, the second ejector spring is compressed, the magnetic drive plate is magnetically attracted to the electromagnet at the corresponding position, and the pressure drive plate at the corresponding position is compressed. The magnetic drive plate is made of metal.

[0025] As a preferred technical solution, a limiting ring is provided at the outer end of the sliding bearing of the power clamping head. One side of the limiting ring is limited and supported by the end face of the fixed support base. An elastic rubber support ring is installed on the other side of the fixed support base. A stepped surface is provided on the power clamping head directly opposite the elastic rubber support ring. The stepped surface contacts and supports the elastic rubber support ring.

[0026] As a preferred technical solution, a workpiece positioning mechanism is also included. The workpiece positioning mechanism includes a support platform, a support ring is fixedly installed on the top of the support platform, and multiple threaded holes are opened around the circumference of the support ring. A threaded rod is installed through each threaded hole. A support roller is embedded in the threaded rod on one side of the workpiece. The support roller is made to contact and support the outer surface of the workpiece by adjusting the threaded rod.

[0027] As a preferred technical solution, the bottom of the power drive head is provided with a pressing contact block, and a movable limiting mechanism is provided on the bottom surface of the support on one side of the pressing contact block. After the magnetic drive plate is magnetically attracted and fixed to the corresponding position electromagnet, the movable limiting mechanism is adjusted to one side of the pressing contact block, so that the movable limiting mechanism contacts and supports the pressing contact block, thereby limiting the rotation of the power drive head in the circumferential direction.

[0028] As a preferred technical solution, the movable limiting mechanism includes a movable adjusting base, the bottom of which is slidably installed in a movable adjusting groove on the bracket, a limiting support rod is fixedly installed on the movable adjusting base, and an adjusting screw is provided at the outer end of the movable adjusting base. The adjusting screw passes through an adjusting screw hole on the bracket and extends into the movable adjusting groove.

[0029] The beneficial effects of this invention are: this invention combines the torsion and tensile test structures into a whole, which greatly reduces the size and weight of the equipment, improves the mobility and applicability of the equipment, and saves users storage and transportation costs;

[0030] Users only need to rotate the power drive mechanism to control the magnetic drive plate to rotate to different positions of the linkage drive mechanism to switch the fixed point of the clamping mechanism on the workpiece, that is, to obtain the change of the clamping point in the length direction of the workpiece, without complicated steps or tools.

[0031] Since no manual disassembly or assembly is required, the preparation time before and after the test and the time for replacement in between are greatly reduced, making the test process smoother and improving work efficiency.

[0032] Furthermore, the use of electromagnets and magnetic drive plates ensures the stability and repeatability of the clamping force, making the test results more accurate and reliable. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0035] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0036] Figure 3 This is a schematic diagram of the overall structure of the present invention. Figure 3 ;

[0037] Figure 4 This is a schematic diagram of the structure of the power clamping device of the present invention;

[0038] Figure 5 For the present invention Figure 4 A structural diagram from another perspective;

[0039] Figure 6 For the present invention Figure 4 A schematic diagram of the front structure;

[0040] Figure 7 This is a three-dimensional cross-sectional schematic diagram of the power clamping device of the present invention;

[0041] Figure 8 For the present invention Figure 7 A magnified view of a section at point A in the middle;

[0042] Figure 9 This is a magnified view of the overall part of the present invention;

[0043] Figure 10 This is a partial structural schematic diagram of the power clamping device of the present invention;

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Drive motor; 2. Motor base; 3. Bracket; 4. Connecting rod; 5. Support platform; 6. Connecting plate; 7. Power drive head; 8. Threaded rod; 9. Second end panel; 10. Support ring; 11. Adjusting screw; 12. Workpiece; 13. Clamping and fixing head; 14. Movable slot; 15. Fixed support base; 16. Magnetic drive plate; 17. Limiting support rod; 18. Movable adjusting base; 19. Movable adjusting slot; 20. First end panel; 22. 23. Ejector spring; 24. Electromagnet; 25. Extrusion contact block; 26. Clamping cavity; 27. First clamping plate; 28. Second clamping plate; 29. ​​Extrusion inclined contact surface; 20. Sliding bearing; 31. Elastic rubber support ring; 32. Limiting ring; 33. Second pressure drive plate; 34. Stepped surface; 35. Power clamping head; 36. Drive unit; 37. Contact unit; 38. First ejector spring; 39. Mounting groove; 30. First pressure drive plate. Detailed Implementation

[0046] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0047] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0048] like Figure 1 As shown, an integrated torsional tensile testing machine of the present invention includes a bracket 3, which is C-shaped, and a clamping and fixing head 13 is installed on one side of the bracket 3, as shown. Figure 3As shown, the clamping head 13 can be any kind of clamp that can clamp shaft-type workpieces 12, such as a three-jaw chuck, etc.

[0049] A power clamping device is fixedly installed on the other side of the bracket 3. A power drive mechanism is installed on the other side of the power clamping device. The power drive mechanism drives the power clamping device to rotate. One end of the workpiece 12 to be tested is clamped and fixed in the clamping head 13, and the other end is clamped and fixed in the power clamping device. Therefore, the workpiece 12 at the clamping head 13 end can never rotate. The power clamping device is the end to which torsional force and tensile force are applied. After the power clamping device clamps the workpiece 12, it can realize both tensile force testing and simultaneous tension and torsion testing.

[0050] like Figures 1-3 As shown, the power clamping device includes a fixed support base 15 and a power clamping head 33 rotatably installed in the fixed support base 15. The power clamping head 33 has a clamping cavity 25 on the side opposite to the clamping fixed head 13. Two sets of clamping mechanisms are installed in the clamping cavity 25. The two sets of clamping mechanisms are staggered in front and behind in the clamping cavity 25. The two sets of clamping mechanisms have clamping points in different length directions in the clamping cavity 25. In this embodiment, two sets of clamping mechanisms with different position points are set in the clamping cavity 25, so the workpiece 12 can be clamped with two clamping points. Of course, more clamping points can be set in the length direction of the clamping cavity 25 to achieve more clamping position points, depending on the number of clamping mechanisms and the length of the clamping cavity 25.

[0051] It also includes two sets of linkage drive mechanisms, which are arranged in a staggered circular pattern on one end face of the power clamping head 33. Each set of linkage drive mechanisms corresponds to a clamping mechanism, such as... Figure 7 As shown, in this embodiment, the number of linkage drive mechanisms is set in accordance with the number of clamping mechanisms. In this embodiment, there are two clamping mechanisms, that is, two clamping positioning points. Therefore, the number of linkage drive mechanisms is also two, with each linkage drive mechanism corresponding to one clamping mechanism. Thus, each linkage drive mechanism corresponds to one clamping mechanism. When the linkage drive mechanism at the corresponding position moves, it can drive the clamping mechanism at the corresponding position to clamp the workpiece 12. Therefore, the movement of the linkage drive mechanism directly determines the movement of the corresponding clamping mechanism. So, as long as the trigger position of the linkage drive mechanism is controlled, the corresponding clamping mechanism can perform the clamping action.

[0052] In this embodiment, the power drive mechanism includes a drive motor 1. A power drive head 7 is rotatably mounted on the power output end of the drive motor 1. Magnetic drive plates 16 are positioned on the power drive head 7 corresponding to the positions of the two sets of linkage drive mechanisms. When the magnetic drive plates 16 rotate to correspond to different sets of linkage drive mechanisms, they drive different clamping mechanisms to clamp the workpiece 12 under test in different length directions. When the magnetic drive plates 16 are not magnetically attracted and fixed to any set of linkage drive mechanisms, both sets of clamping mechanisms are in a loose state relative to the workpiece 12. Once the electromagnet 23 is energized, the electromagnet 23 generates an attractive force, causing the magnetic drive plates 16, which were not originally in contact with the electromagnet 23, to be attracted to the electromagnet 23. Since one end of the magnetic drive plate 16 is connected to the power drive head 7, the power drive head 7 can press against the linkage drive mechanism. Therefore, the position of the magnetic drive plate 16 at this time determines the action of the linkage drive mechanism at that position. Figure 4 , Figure 7 and Figure 8 As shown.

[0053] The linkage drive mechanism includes a first linkage drive mechanism and a second linkage drive mechanism. Both the first and second linkage drive mechanisms include at least two sets of electromagnets 23. A pressure drive plate protruding from the surface of each electromagnet 23 is installed between the two sets of electromagnets 23. The pressure drive plates are installed in mounting slots 37 on the power clamping head 33. A first ejection spring 36 is installed in each mounting slot 37, and the pressure drive plate is ejected by the first ejection spring 36. Figure 7 and Figure 8 As shown;

[0054] When the power drive head 7 moves toward the drive motor 1, the attraction between the magnetic drive plate 16 and the electromagnet 23 is greater than the elastic ejection force of the first ejection spring 36. Therefore, the pressure drive plate at the corresponding position is pressed and pushed into the mounting groove 37. The first ejection spring 36 is pressed, and the pressed pressure drive plate can then be linked with the clamping mechanism at the corresponding position. The clamping mechanism at the corresponding position can then clamp the workpiece 12 located in the clamping cavity 25.

[0055] Continue reading Figure 7 and Figure 8Each pressure drive plate has a drive portion 34 at its bottom. Each drive portion 34 has a corresponding contact portion 35 of the clamping mechanism at its bottom. The drive portion 34 has a first inclined contact surface on the side opposite to the contact portion 35. The contact portion 35 has a second inclined contact surface at the position corresponding to the first inclined contact surface. When the magnetic drive plate 16 is magnetically attracted to the electromagnet 23, the magnetic drive plate 16 pushes the pressure drive plate, which in turn pushes the contact portion 35 of the clamping mechanism, causing the clamping mechanism to perform a clamping and pressing action relative to the workpiece 12. Since the drive portion 34 and the contact portion 35 provide inclined contact between the first and second inclined contact surfaces, when the pressure drive plate is pressed by the magnetic drive plate 16, it can press the corresponding clamping mechanism to perform a clamping action.

[0056] like Figure 8 and Figure 10 As shown, the first linkage drive mechanism includes three first pressure drive plates 38, which are arranged in a circle on one end face of the power clamping head 33, and the included angle between the three first pressure drive plates 38 is 120 degrees.

[0057] The second linkage drive mechanism includes three second pressure drive plates 31. The included angle between the three second pressure drive plates 31 is 120 degrees and they are offset from the three first pressure drive plates 38. The included angle between the first pressure drive plate 38 and the second pressure drive plate 31 on the adjacent side is 60 degrees.

[0058] If more clamping positions are required, a third linkage drive mechanism can be set. If there are three linkage drive mechanisms, the included angle between adjacent pressure drive plates becomes 40 degrees, and so on.

[0059] In this embodiment, the magnetic drive plates 16 are also configured as three plates, which are arranged at 120-degree intervals around the power drive head 7. When located at the position of the second pressure drive plate 31, the three magnetic drive plates 16 correspond exactly to the three second pressure drive plates 31. Figure 8As shown, when the entire power drive head 7 rotates 60 degrees, the three magnetic drive plates 16 are exactly positioned on the three first pressure drive plates 38. By rotating the power drive head 7 back and forth by 60 degrees, different clamping points can be obtained. The operation method is similar when three linkage drive mechanisms and three clamping mechanisms are set. The power drive head 7 only needs to rotate 40 degrees each time to achieve continuous switching. When switching, simply disconnect the power supply of the electromagnet 23. After switching to the corresponding position, the electromagnet 23 can be manually controlled to open, generating magnetic attraction to attract the magnetic drive plates 16. The clamping mechanism can then perform the corresponding clamping action through the contact part 35 and the drive part 34. Therefore, during the experiment, when it is necessary to switch the clamping position of the workpiece 12 in the length direction, simply disconnect the power supply of the electromagnet 23 and control the drive motor 1 to rotate the corresponding angle to achieve the switching of the clamping position.

[0060] When a torsion test is required, simply turn on the electromagnet 23. The electromagnet 23 will attract the magnetic drive plate 16. At this time, the high magnetic strength of the electromagnet 23 will strongly attract the magnetic drive plate 16. The magnetic drive plate 16 and the electromagnet 23 will be tightly attracted. Therefore, two electromagnets 23 need to be set at each location, and they should be high-power electromagnets 23. After attraction, they are strong enough to ensure the attraction strength and complete the required torsion force test. The magnetic attraction strength of the electromagnet 23 can be selected according to the torsion force requirement of the workpiece 12 to be tested.

[0061] like Figure 4 , Figure 5 and Figure 7 As shown, a sliding bearing 28 is installed inside the fixed support base 15, and the power clamping head 33 is rotatably installed inside the sliding bearing 28. The power clamping head 33 is provided with a first end panel 20 and a second end panel 9 with an outer diameter larger than that of the power clamping head 33. An annular cavity is formed between the first end panel 20 and the second end panel 9. Both sets of linkage drive mechanisms are installed on the end face of the first end panel 20, as shown. Figure 10 As shown, the first end panel 20 is disposed on the side close to the power drive mechanism, and the first end panel 20 and the second end panel 9 are located outside the clamping cavity 25.

[0062] Both sets of clamping mechanisms include three first clamping plates 26 and three second clamping plates 27. Each clamping plate is movably disposed in the clamping mounting groove 37 opened on the inner wall of the clamping cavity 25, and each clamping plate is provided with a contact part 35.

[0063] Each of the three first clamping plates 26 corresponds to one of the three first pressure driving plates 38, and each of the three second clamping plates 27 corresponds to one of the three second pressure driving plates 31. The three first clamping plates 26 are arranged in a 120-degree circle, while the three second clamping plates 27 are arranged in a staggered circle relative to the first clamping plates 26. Adjacent first clamping plates 26 and second clamping plates 27 form a 60-degree angle. The three first clamping plates 26 are located at the rear end of the three second clamping plates 27. The three first clamping plates 26 and three second clamping plates 27 have clamping points in different length directions within the clamping cavity 25. Different sets of linkage driving mechanisms are driven by magnetic driving plates 16 to perform clamping actions. Figure 6 As shown, when the pressure driving plate at the corresponding position is pressed, the driving part 34 can squeeze the contact part 35, thereby pushing the clamping plate at the corresponding position to clamp the workpiece 12. Considering that the outer diameter of each workpiece 12 is different, the thickness of the clamping plate needs to be adjusted accordingly. In this embodiment, a clamping tile can be provided for each clamping plate. The clamping tile can be provided with an assembly port. The clamping plate is inserted into the assembly port of the clamping tile. The clamping plate and the assembly port can be tightly fitted. When replacing, simply remove the clamping tile and replace it with a clamping tile of different thickness to meet the clamping of workpieces 12 with different outer diameters.

[0064] like Figure 9 As shown, multiple connecting rods 4 are fixedly mounted on the power drive head 7. The other end of each connecting rod 4 is movably mounted on a connecting plate 6. One side of the connecting plate 6 is fixedly connected to the motor shaft of the drive motor 1. The bottom of the drive motor 1 is fixed on the motor base 2, and the bottom of the base is fixed on the bracket 3. A movable groove 14 is provided on the outer circumference of the connecting plate 6 corresponding to each connecting rod 4. The connecting rod 4 is movably fastened in the movable groove 14. Sliding grooves are provided on both sides of the movable groove 14. A slider is provided on each connecting rod 4 at the position corresponding to the sliding groove. The slider is slidably mounted in the sliding groove, and a slider is installed in each sliding groove. Equipped with a second ejection spring 22, the slider is pushed by the second ejection spring 22, which pushes out the connecting rod 4 and the power drive head 7, so that the magnetic drive plate 16 on the power drive head 7 does not contact the pressure drive plate in the linkage drive mechanism. However, the magnetic drive plate 16 is always within the magnetic attraction range of the electromagnet 23 and is pushed out by the second ejection spring 22. When the electromagnet 23 attracts the magnetic drive plate 16, the power drive head 7 moves backward with the connecting rod 4. At this time, the second ejection spring 22 is compressed. Once the electromagnet 23 is closed, the power drive head 7 can be reset by the second ejection spring 22.

[0065] When the electromagnet 23 in the linkage drive mechanism is energized and generates magnetic force, the electromagnet 23 attracts the magnetic drive plate 16, causing the power drive head 7 and the connecting rod 4 to move towards the connecting plate 6. At this time, the second ejector spring 22 is compressed, the magnetic drive plate 16 is magnetically attracted to the electromagnet 23 at the corresponding position, and the pressure drive plate at the corresponding position is compressed. The magnetic drive plate 16 is made of metal.

[0066] Among them, a limiting ring 30 is provided at the outer end of the sliding bearing 28 of the power clamping head 33. One side of the limiting ring 30 is limited and supported by the end face of the fixed support base 15. Through the limiting ring 30, one side of the power clamping head 33 is limited, such as... Figure 7 As shown, an elastic rubber support ring 29 is installed on the other side of the fixed support base 15. A stepped surface 32 is provided on the power clamping head 33 opposite to the elastic rubber support ring 29. The stepped surface 32 contacts and supports the elastic rubber support ring 29. Due to the setting of the elastic rubber support ring 29, when the torsional tensile test is carried out, that is, when the tensile force is applied, the entire power clamping head has a backward force in the length direction relative to the sliding bearing 28 side, so as to achieve the purpose of pulling.

[0067] like Figure 2 As shown, it also includes a workpiece 12 positioning mechanism. The workpiece 12 positioning mechanism includes a support platform 5, and a support ring 10 is fixedly installed on the top of the support platform 5. Multiple threaded holes are opened around the circumference of the support ring 10, and a threaded rod 8 is installed through each threaded hole. A support roller is embedded in the threaded rod 8 on one side of the workpiece 12. By adjusting the threaded rod 8, the support roller is made to contact and support the outer surface of the workpiece 12. A pressing contact block 24 is provided at the bottom of the power drive head 7. A movable limiting mechanism is provided on the bottom surface of the bracket 3 on one side of the pressing contact block 24. When the magnetic... After the force-driven plate 16 is magnetically attracted and fixed to the corresponding electromagnet 23, the movable limiting mechanism is adjusted to one side of the extrusion contact block 24, so that the movable limiting mechanism contacts and supports the extrusion contact block 24. The movable limiting mechanism limits the rotation of the power drive head 7 in the circumferential direction, and the support roller achieves rolling support with the workpiece 12. The threaded rod 8 is used for threaded adjustment according to the different outer diameters of the workpiece 12. It is simple and convenient. The purpose of setting the workpiece 12 positioning mechanism is to always support the workpiece 12 and prevent the workpiece 12 from moving when the clamping mechanism switches clamping points.

[0068] like Figure 2 and Figure 3As shown, the movable limiting mechanism includes a movable adjusting base 18. The bottom of the movable adjusting base 18 is slidably installed in the movable adjusting groove 19 opened on the bracket 3. A limiting support rod 17 is fixedly installed on the movable adjusting base 18. An adjusting screw 11 is set at the outer end of the movable adjusting base 18. The adjusting screw 11 passes through the adjusting screw hole opened on the bracket 3 and extends into the movable adjusting groove 19. When it is necessary to perform torsional force test and tensile force test simultaneously, the electromagnet 23 is turned on. The electromagnet 23 attracts the power drive head 7. After the power drive head 7 is displaced, the movable adjusting base 18 is slid to the position of the pressing contact block 24, and the... The limiting support rod 17 contacts and supports the pressing inclined contact surface 241 on one side of the pressing contact block 24. When the power drive head 7 is driven to rotate by the drive motor 1, the pressing inclined contact surface 241 on the pressing contact block 24 contacts and limits the limiting support rod 17 due to the setting of the limiting support rod 17. At this time, if the power drive head 7 wants to rotate, it will definitely be pressed against the limiting support rod 17 and then move backward, achieving the purpose of torsion and tension test. After the test is completed, the power supply of the electromagnet 23 can be disconnected, and after rotating a certain angle, the electromagnet 23 can be turned on again to complete the switching of the clamping position point in the length direction of the workpiece 12, which is simple and convenient.

[0069] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An integrated torsional tensile testing machine, characterized in that, include: A bracket (3) is provided, with a clamping head (13) installed on one side of the bracket (3) and a power clamping device fixedly installed on the other side of the bracket (3). A power drive mechanism is installed on the other side of the power clamping device. The power clamping device is driven to rotate by the power drive mechanism. One end of the workpiece (12) to be tested is clamped and fixed in the clamping head (13), and the other end is clamped and fixed in the power clamping device. The power clamping device includes a fixed support base (15) and a power clamping head (33) rotatably installed in the fixed support base (15). The power clamping head (33) has a clamping cavity (25) on the side opposite to the clamping fixed head (13). Two sets of clamping mechanisms are installed in the clamping cavity (25). The two sets of clamping mechanisms are staggered in front and behind in the clamping cavity (25). The two sets of clamping mechanisms have clamping points in different length directions in the clamping cavity (25). It also includes two sets of linkage drive mechanisms, which are arranged in a circumferentially staggered manner on one end face of the power clamping head (33), with each set of linkage drive mechanisms corresponding to a clamping mechanism; The power drive mechanism includes a drive motor (1), and a power drive head (7) is rotatably mounted on the power output end of the drive motor (1). The power drive head (7) is provided with a magnetic drive plate (16) corresponding to the positions of the two sets of linkage drive mechanisms. When the magnetic drive plate (16) rotates and corresponds to different sets of linkage drive mechanisms, it is used to drive different clamping mechanisms to clamp the workpiece (12) to be tested in different length directions. When the magnetic drive plate (16) is not magnetically attracted and fixed to any set of linkage drive mechanisms, both sets of clamping mechanisms are in a loose state relative to the workpiece (12). The two sets of linkage drive mechanisms include a first linkage drive mechanism and a second linkage drive mechanism. Both the first linkage drive mechanism and the second linkage drive mechanism include at least two sets of electromagnets (23). A pressure drive plate protruding from the surface of the electromagnet (23) is installed between the two sets of electromagnets (23). The pressure drive plate is installed in the mounting groove (37) opened on the power clamping head (33). A first ejection spring (36) is installed in the mounting groove (37) to eject the pressure drive plate. Each pressure drive plate has a drive part (34) at its bottom. Each drive part (34) has a corresponding contact part (35) of the clamping mechanism at its bottom. The drive part (34) has a first inclined contact surface on the side opposite to the contact part (35). The contact part (35) has a second inclined contact surface at the position corresponding to the first inclined contact surface. When the magnetic drive plate (16) is magnetically attracted to the electromagnet (23), the magnetic drive plate (16) pushes the pressure drive plate, which in turn pushes the contact part (35) of the clamping mechanism, so that the clamping mechanism performs a clamping and pressing action relative to the workpiece (12). The first linkage drive mechanism includes three first pressure drive plates (38), which are arranged in a circle on one end face of the power clamping head (33), and the included angle between the three first pressure drive plates (38) is 120 degrees. The second linkage drive mechanism includes three second pressure drive plates (31), the included angle between the three second pressure drive plates (31) is 120 degrees and they are offset from the three first pressure drive plates (38), and the included angle between the first pressure drive plate (38) and the second pressure drive plate (31) on the adjacent side is 60 degrees. Multiple connecting rods (4) are fixedly installed on the power drive head (7). The other end of the connecting rod (4) is movably installed on a connecting plate (6). One side of the connecting plate (6) is fixedly connected to the motor shaft of the drive motor (1). The bottom of the drive motor (1) is fixed on the motor seat (2). The bottom of the motor seat is fixed on the bracket (3). A movable groove (14) is provided on the outer circular surface of each connecting rod (4) of the connecting plate (6). The connecting rod (4) is movably fastened in the movable groove (14). Slide grooves are provided on both sides of the movable groove (14). A slider is provided on each connecting rod (4) at the position corresponding to the slide groove. The slider is slidably installed in the slide groove. A second ejection spring (22) is installed in each slide groove. The second ejection spring (22) pushes the slider and ejects the connecting rod (4) and the power drive head (7), so that the magnetic drive plate (16) on the power drive head (7) does not contact the pressure drive plate in the linkage drive mechanism. When the electromagnet (23) in the linkage drive mechanism is energized and generates magnetic force, the electromagnet (23) attracts the magnetic drive plate (16), causing the power drive head (7) and the connecting rod (4) to move towards the connecting plate (6). At this time, the second ejector spring (22) is compressed, the magnetic drive plate (16) is magnetically attracted to the electromagnet (23) at the corresponding position, and the pressure drive plate at the corresponding position is compressed. The magnetic drive plate (16) is made of metal.

2. The integrated torsion tensile testing machine according to claim 1, characterized in that: A sliding bearing (28) is installed inside the fixed support base (15), and the power clamping head (33) is rotatably installed inside the sliding bearing (28). The power clamping head (33) is provided with a first end panel (20) and a second end panel (9) with an outer diameter larger than that of the power clamping head (33). An annular cavity is formed between the first end panel (20) and the second end panel (9). Both sets of linkage drive mechanisms are installed on the end face of the first end panel (20). The first end panel (20) is located on the side close to the power drive mechanism. The first end panel (20) and the second end panel (9) are located outside the clamping cavity (25).

3. The integrated torsion tensile testing machine according to claim 1, characterized in that: Both sets of clamping mechanisms include three first clamping plates (26) and three second clamping plates (27). Each clamping plate is movably disposed in a clamping mounting groove (37) opened on the inner wall of the clamping cavity (25), and each clamping plate is provided with a contact part (35). The three first clamping plates (26) are all set in relation to the three first pressure driving plates (38), and the three second clamping plates (27) are all set in relation to the three second pressure driving plates (31). The three first clamping plates (26) are arranged in a 120-degree circle. The three second clamping plates (27) are arranged in a circumferentially staggered manner with the first clamping plates (26). The three second clamping plates (27) are arranged in a 120-degree circle. The adjacent first clamping plates (26) and second clamping plates (27) are at a 60-degree angle. The three first clamping plates (26) are located at the rear end of the three second clamping plates (27). The three first clamping plates (26) and the three second clamping plates (27) have different clamping points in the length direction in the clamping cavity (25). The different sets of linkage driving mechanisms are driven to perform clamping actions by magnetic driving plates (16) adsorbing and fixing them.

4. The integrated torsion tensile testing machine according to claim 2, characterized in that: The power clamping head (33) is provided with a limiting ring (30) at the outer end of the sliding bearing (28). One side of the limiting ring (30) is limited and supported by the end face of the fixed support base (15). An elastic rubber support ring (29) is installed on the other side of the fixed support base (15). A stepped surface (32) is provided on the power clamping head (33) directly opposite the elastic rubber support ring (29). The stepped surface (32) contacts and supports the elastic rubber support ring (29).

5. The integrated torsion tensile testing machine according to claim 1, characterized in that: It also includes a workpiece (12) positioning mechanism, which includes a support platform (5). A support ring (10) is fixedly installed on the top of the support platform (5). Multiple threaded holes are opened around the circumference of the support ring (10). A threaded rod (8) is provided through each threaded hole. A support roller is embedded in the threaded rod (8) on one side of the workpiece (12). By adjusting the threaded rod (8), the support roller is made to contact and support the outer surface of the workpiece (12).

6. The integrated torsion tensile testing machine according to claim 1, characterized in that: The bottom of the power drive head (7) is provided with a pressing contact block (24). A movable limiting mechanism is provided on the bottom surface of the bracket (3) on one side of the pressing contact block (24). After the magnetic drive plate (16) is magnetically attracted and fixed to the corresponding electromagnet (23), the movable limiting mechanism is adjusted to one side of the pressing contact block (24) so ​​that the movable limiting mechanism contacts and supports the pressing contact block (24). The rotation of the power drive head (7) in the circumferential direction is limited by the movable limiting mechanism.

7. The integrated torsion tensile testing machine according to claim 6, characterized in that: The movable limiting mechanism includes a movable adjusting base (18). The bottom of the movable adjusting base (18) is slidably installed in the movable adjusting groove (19) opened on the bracket (3). A limiting support rod (17) is fixedly installed on the movable adjusting base (18). An adjusting screw (11) is set at the outer end of the movable adjusting base (18). The adjusting screw (11) passes through the adjusting screw hole opened on the bracket (3) and extends into the movable adjusting groove (19). The limiting support rod (17) contacts and supports the extrusion inclined contact surface (241) on one side of the extrusion contact block (24).

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