A multi-point testing device for titanium-nickel alloy hardness detection

Abstract

This invention belongs to the field of titanium-nickel alloy testing technology, and particularly relates to a multi-point testing device for testing the hardness of titanium-nickel alloys. It includes a hardness tester body, a support base on the upper end of the lifting platform of the hardness tester body, and an adjustment component, including a fixed plate positioned above the support base and an adjustment element positioned between the fixed plate and the support base. The adjustment component allows for flexible adjustment of the horizontal position of the fixed plate, enabling testing of titanium-nickel alloy bars at different locations. Simultaneously, the square slot of the positioning component cooperates with the positioning element to quickly position the titanium-nickel alloy bar, avoiding data errors caused by bar offset during testing. Furthermore, after the positioning element separates from the bar, it automatically provides centered support, ensuring coaxiality during bar rotation and allowing operators to easily rotate the bar without repeated positioning and calibration, significantly improving the efficiency of multi-point testing.

Description

Technical Field

[0001] This invention belongs to the field of titanium-nickel alloy testing technology, and particularly relates to a multi-point testing device for testing the hardness of titanium-nickel alloys. Background Technology

[0002] Titanium-nickel alloys, with their excellent shape memory effect, superelasticity, and corrosion resistance, are increasingly widely used in high-end fields such as aerospace, medical devices, and precision machinery. Hardness, as a key mechanical property indicator, directly affects the service life and operational safety of products. Therefore, accurate multi-point hardness testing is required for titanium-nickel alloy bars and other workpieces. Existing titanium-nickel alloy hardness testing devices have the following problems in practical applications: Firstly, traditional devices lack a flexible position adjustment mechanism, making it difficult to quickly switch the testing points of the bar stock. Repeated disassembly, repositioning, and re-fixing are necessary, resulting in cumbersome and inefficient operation. Secondly, the positioning structure design is unreasonable, leading to insufficient positioning accuracy for titanium-nickel alloy bars. Bar stock deviation and wobbling easily occur during testing, causing distorted test data that fails to reflect the true hardness of the workpiece. Finally, while some devices can achieve preliminary positioning, switching testing points requires manually rotating the bar stock after releasing the positioning. This not only makes it difficult to ensure the coaxiality of the bar stock during rotation but also necessitates recalibrating the positioning, further increasing operational difficulty and testing time. Furthermore, manual operation can easily damage the bar stock surface, affecting subsequent use. Therefore, improvements are urgently needed. Thus, we propose a multi-point testing device for the hardness testing of titanium-nickel alloys. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a multi-point testing device for hardness testing of titanium-nickel alloys, achieving the effect of multi-point testing and positioning of titanium-nickel alloy bars.

[0004] In view of this, the present invention provides a multi-point testing device for hardness testing of titanium-nickel alloy, including a hardness tester body, a support seat provided on the upper end of the lifting worktable of the hardness tester body, an adjustment assembly including a fixed plate disposed above the support seat, and an adjustment member disposed between the fixed plate and the support seat, the adjustment member being used to adjust the horizontal position of the fixed plate on the support seat, a positioning assembly including positioning frames disposed on both sides of the upper end of the fixed plate, a square slot provided in the middle of the positioning frame, and a positioning member disposed in the inner cavity of the positioning frame, the positioning member cooperating with the square slot for positioning the titanium-nickel alloy bar, and a rotation support assembly including a central support member disposed outside the positioning frame, the central support member being aligned with the square slot, the central support member being used for central support of the titanium-nickel alloy bar.

[0005] Furthermore, an objective lens is provided at the upper end of the hardness tester body, and an indenter is provided at the upper end of the lifting worktable.

[0006] Furthermore, the adjusting component includes a sliding groove disposed in the middle of the upper end of the bearing seat, a slider disposed in the inner cavity of the sliding groove, the upper end of the slider being fixedly connected to the lower end of the fixing plate, a first lead screw sleeve being fixedly installed in the middle of the slider, and a first lead screw being rotatably installed in the inner cavity of the sliding groove through a bearing, the first lead screw being threadedly connected to the first lead screw sleeve.

[0007] Furthermore, the size of the slider is adapted to the size of the groove, and the slider and the groove are slidably connected.

[0008] Furthermore, the positioning component includes a receiving groove disposed on one side of the square slot, a V-shaped limiting plate disposed in the inner cavity of the receiving groove, a fixing frame fixedly installed on one side of the V-shaped limiting plate, the lower end of the fixing frame being slidably connected to the lower end of the inner cavity of the receiving groove, a second lead screw sleeve fixedly installed in the middle of the fixing frame, a servo motor disposed on the side of the receiving groove away from the square slot, and a second lead screw being installed on the drive end of the servo motor.

[0009] Furthermore, the dimensions of the second lead screw are adapted to the dimensions of the second lead screw sleeve, and the second lead screw and the second lead screw sleeve are threaded together.

[0010] Furthermore, the centering support includes four fixing strips fixedly disposed on the outside of the positioning frame, and the four fixing strips are arranged in a ring. A wedge-shaped block is fixedly installed on the outside of the fixing strip, and a support arc plate is fixedly installed on the end of the fixing strip away from the square slot. Multiple balls are rolled on the inner side of the support arc plate, and a fixing ring is sleeved on the outside of the four fixing strips.

[0011] Furthermore, a rack is welded to one side of the fixing ring, the rack passes through the receiving groove and is movably connected to the positioning frame, and a gear is fixedly installed at the end of the second lead screw near the rack, the gear meshing with the rack.

[0012] The beneficial effects of this invention are: The adjustment component allows for flexible adjustment of the horizontal position of the fixed plate, enabling testing of titanium-nickel alloy bars at different locations. Simultaneously, the square slot of the positioning component, in conjunction with the positioning piece, quickly positions the titanium-nickel alloy bar, avoiding data errors caused by bar offset during testing. Crucially, the linkage structure between the positioning piece and the centering support automatically provides centering support after the positioning piece separates from the bar, ensuring coaxiality during bar rotation and allowing operators to easily rotate the bar without repeated positioning and calibration, significantly improving the efficiency of multi-point testing. Attached Figure Description

[0013] Figure 1This is a first-view structural schematic diagram of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. Figure 2 This is a second-view structural schematic diagram of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. Figure 3 This is a schematic diagram of the positioning component and rotating support component of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. Figure 4 This is an exploded view of the positioning and adjustment components of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. Figure 5 This is a schematic diagram of the positioning component structure of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. Figure 6 This is a schematic diagram of the rotating support assembly structure of a multi-point testing device for hardness testing of titanium-nickel alloys proposed in this invention. The markings in the diagram are as follows: 1. Hardness tester body; 11. Lifting worktable; 12. Indenter; 13. Objective lens; 2. Bearing base; 21. First lead screw; 22. Slide groove; 23. Slider; 24. First lead screw sleeve; 25. Fixing plate; 3. Positioning frame; 31. Square slot; 32. V-shaped limit plate; 33. Fixing frame; 34. Servo motor; 35. Second lead screw; 36. Second lead screw sleeve; 37. Receiving groove; 4. Fixing strip; 41. Wedge block; 42. Fixing ring; 43. Support arc plate; 44. Ball bearing; 45. Rack; 46. Gear. Detailed Implementation

[0014] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0015] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0016] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0017] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0018] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0019] Reference Figures 1 to 6 A multi-point testing device for hardness testing of titanium-nickel alloy includes a hardness tester body 1, a support seat 2 on the upper end of the lifting worktable 11 of the hardness tester body 1, an adjustment assembly including a fixed plate 25 disposed above the support seat 2, and an adjustment component disposed between the fixed plate 25 and the support seat 2, the adjustment component being used to adjust the horizontal position of the fixed plate 25 on the support seat 2, a positioning assembly including positioning frames 3 disposed on both sides of the upper end of the fixed plate 25, a square slot 31 opened in the middle of the positioning frame 3, and a positioning component disposed in the inner cavity of the positioning frame 3, the positioning component cooperating with the square slot 31 to position the titanium-nickel alloy bar, and a rotation support assembly including a central support component disposed on the outside of the positioning frame 3, the central support component being aligned with the square slot 31, the central support component being used to centrally support the titanium-nickel alloy bar.

[0020] In the initial stage of testing, the titanium-nickel alloy bar is placed into the square slot 31 of the positioning component. The positioning component and the square slot 31 cooperate to form a positioning structure, quickly limiting and fixing the bar to prevent it from shifting during testing and avoiding data errors. Subsequently, the fixing plate 25 is moved horizontally by the adjustment component, which drives the positioned bar above to move synchronously, so that the test point of the bar corresponds to the test end of the hardness tester body 1. After a single test is completed, the positioning component is separated from the bar. At the same time, the central support component of the rotating support component is synchronously linked to clamp and support the bar in the square slot 31, ensuring the coaxiality of the bar during rotation. This also allows the operator to easily rotate the bar to switch test points without repeated disassembly and positioning calibration, thereby achieving efficient multi-point hardness testing of the bar, balancing accuracy and convenience, and reducing the intensity of manual operation.

[0021] In the example of this application, an objective lens 13 is provided at the upper end of the hardness tester body 1, and an indenter 12 is provided at the upper end of the lifting worktable 11.

[0022] As a preferred example of this utility model, before testing, the staff can clearly observe the surface of the titanium-nickel alloy bar through the objective lens 13 and align it with the point to be tested. This allows for intuitive correction of the testing position and avoids data distortion due to positioning deviation. After starting the testing program, the hardness tester body 1 issues a control command to drive the lifting worktable 11 to move the pressure head 12 toward the bar testing point. The pressure head 12 applies stable and controllable pressure according to preset parameters to complete the data acquisition for hardness testing.

[0023] In the example of this application, the adjusting component includes a slide groove 22 disposed in the middle of the upper end of the bearing seat 2. A slider 23 is disposed in the inner cavity of the slide groove 22. The upper end of the slider 23 is fixedly connected to the lower end of the fixing plate 25. A first lead screw sleeve 24 is fixedly installed in the middle of the slider 23. A first lead screw 21 is rotatably installed in the inner cavity of the slide groove 22 through a bearing. The first lead screw 21 is threadedly connected to the first lead screw sleeve 24.

[0024] As a preferred example of this utility model, during adjustment, the first lead screw 21 is rotated around the bearing. Because the first lead screw 21 is threadedly engaged with the first lead screw sleeve 24 on the slider 23, the rotational motion of the lead screw is converted into the linear motion of the slider 23 along the slide groove 22, which in turn drives the fixed plate 25 fixed to the slider 23 to move horizontally in sync. This allows different detection points of the titanium-nickel alloy bar to be aligned with the pressure head 12, thus meeting the requirements of multi-point testing.

[0025] In the example of this application, the size of the slider 23 is adapted to the size of the groove 22, and the slider 23 and the groove 22 are slidably connected.

[0026] As a preferred example of this utility model, the slider 23 is completely fitted into the groove 22, and its external dimensions are closely fitted to the inner wall of the groove 22. This can strictly limit the movement of the slider 23 only along the axis of the groove 22, and prevent the slider 23 from shifting laterally or tilting during the adjustment process. This ensures that the fixing plate 25 and the titanium-nickel alloy bar supported above it always remain in a horizontal state, thus ensuring the detection accuracy from a structural perspective.

[0027] In the example of this application, the positioning component includes a receiving groove 37 disposed on one side of the square slot 31. A V-shaped limiting plate 32 is disposed in the inner cavity of the receiving groove 37. A fixing frame 33 is fixedly installed on one side of the V-shaped limiting plate 32. The lower end of the fixing frame 33 is slidably connected to the lower end of the inner cavity of the receiving groove 37. A second lead screw sleeve 36 is fixedly installed in the middle of the fixing frame 33. A servo motor 34 is disposed on the side of the receiving groove 37 away from the square slot 31. A second lead screw 35 is installed on the drive end of the servo motor 34.

[0028] As a preferred example of this utility model, the positioning component achieves stable positioning of titanium-nickel alloy bars of different specifications through the transmission cooperation between the V-shaped limiting plate 32, the servo motor 34, the second lead screw 35, and the second lead screw sleeve 36. During positioning, the servo motor 34 starts and drives the second lead screw 35 to rotate. The second lead screw 35 engages with the second lead screw sleeve 36 on the fixed frame 33, causing the fixed frame 33 to slide horizontally along the receiving groove 37, thereby pushing the V-shaped limiting plate 32 to move into the square slot 31. The V-shaped structure can fit the surface of the bar according to its diameter, forming an all-round wrapping limit, effectively preventing the bar from rotating during detection and improving positioning stability. The sliding connection between the fixed frame 33 and the receiving groove 37 provides guidance for the movement of the V-shaped limiting plate 32, ensuring a smooth and unobstructed adjustment process.

[0029] In the example of this application, the dimensions of the second lead screw 35 are adapted to the dimensions of the second lead screw sleeve 36, and the second lead screw 35 and the second lead screw sleeve 36 are threaded together.

[0030] As a preferred example of this utility model, the threaded drive has a self-locking function. After positioning is completed, the second lead screw 35 and the lead screw sleeve can remain in a relatively fixed state, effectively locking the position of the V-shaped limit plate 32, resisting the risk of loosening caused by device vibration during the testing process, continuously maintaining a stable positioning state, and ensuring the smooth progress of the testing process.

[0031] In the example of this application, the centering support includes a fixing strip 4 fixedly disposed on the outside of the positioning frame 3. There are four fixing strips 4, and the four fixing strips 4 are arranged in a ring. A wedge block 41 is fixedly installed on the outside of the fixing strip 4. A support arc plate 43 is fixedly installed on the end of the fixing strip 4 away from the square slot 31. A plurality of balls 44 are rolled on the inside of the support arc plate 43. A fixing ring 42 is sleeved on the outside of the four fixing strips 4.

[0032] As a preferred example of this utility model, when it is necessary to switch the detection point, the fixing ring 42 moves axially and squeezes the wedge block 41. After being subjected to force, the wedge block 41 transmits the force to the center, pushing the four ring-shaped fixing bars 4 to move inward synchronously. This causes the supporting arc plate 43 to adhere to the surface of the titanium-nickel alloy bar, forming a uniform clamping force from all sides to ensure that the bar is in a centered state and to prevent the detection point from shifting due to eccentricity during rotation. The ball bearings 44 on the inner side of the supporting arc plate 43 roll in contact with the surface of the bar, converting the sliding friction during bar rotation into rolling friction, greatly reducing friction and allowing the operator to easily rotate the bar. At the same time, it avoids scratches or damage to the surface of the bar caused by friction, ensuring the integrity of the detection surface. Furthermore, by adjusting the moving distance of the fixing ring 42, the opening and closing amplitude of the fixing bars 4 can be changed to adapt to titanium-nickel alloy bars of different diameters.

[0033] In the example of this application, a rack 45 is welded to one side of the fixing ring 42. The rack 45 passes through the receiving groove 37 and is movably connected to the positioning frame 3. A gear 46 is fixedly installed at one end of the second lead screw 35 near the rack 45. The gear 46 meshes with the rack 45.

[0034] As a preferred example of this utility model, the mechanical linkage between the positioning component and the central support component is constructed by the meshing structure of the rack 45 on one side of the fixing ring 42 and the gear 46 at the end of the second lead screw 35. During the positioning stage, the servo motor 34 drives the second lead screw 35 to rotate forward, causing the V-shaped limiting plate 32 to move towards the bar stock to achieve positioning. At the same time, the gear 46 at the end of the second lead screw 35 rotates forward synchronously, driving the rack 45 to move through meshing, thereby pulling the fixing ring 42 away from the wedge block 41. The fixing bar 4 opens under its own restoring force, supporting the arc plate. 43 separates from the bar stock, without interfering with the positioning operation. After a single test is completed, the servo motor 34 rotates in reverse, driving the second lead screw 35 to move the V-shaped limit plate 32 away from the bar stock to release the positioning. The gear 46 rotates in reverse synchronously, pushing the rack 45 to move the fixing ring 42 towards the wedge block 41 and squeeze the wedge block 41. This causes the fixing bar 4 to drive the support arc plate 43 to clamp the bar stock to achieve centered support, thereby realizing the automatic switching between positioning and support states. This greatly improves the process continuity and operational efficiency of multi-point testing, ensuring a smooth and orderly testing process.

[0035] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-point testing device for hardness testing of titanium-nickel alloys, characterized in that, include: The hardness tester body (1) has a support seat (2) on the upper end of the lifting worktable (11) of the hardness tester body (1). The adjustment assembly includes a fixed plate (25) disposed above the support (2) and an adjustment member for adjusting the horizontal position of the fixed plate (25) on the support (2); The positioning component includes positioning frames (3) disposed on both sides of the upper end of the fixing plate (25), a square slot (31) is provided in the middle of the positioning frame (3), and a positioning element disposed in the inner cavity of the positioning frame (3). The positioning element cooperates with the square slot (31) to position the titanium-nickel alloy bar. The rotating support assembly includes a central support member disposed on the outside of the positioning frame (3), the central support member being aligned with the square slot (31), and the central support member being used to centrally support the titanium-nickel alloy bar.

2. The multi-point testing device for hardness testing of titanium-nickel alloys according to claim 1, characterized in that, The hardness tester body (1) is provided with an objective lens (13) at the upper end, and the lifting worktable (11) is provided with an indenter (12) at the upper end.

3. A multi-point testing device for hardness testing of titanium-nickel alloys according to claim 2, characterized in that, The adjusting component includes a slide groove (22) located in the middle of the upper end of the bearing seat (2). A slider (23) is provided in the inner cavity of the slide groove (22). The upper end of the slider (23) is fixedly connected to the lower end of the fixing plate (25). A first lead screw sleeve (24) is fixedly installed in the middle of the slider (23). A first lead screw (21) is rotatably installed in the inner cavity of the slide groove (22) through a bearing. The first lead screw (21) is threadedly connected to the first lead screw sleeve (24).

4. The multi-point testing device for hardness testing of titanium-nickel alloys according to claim 3, characterized in that, The size of the slider (23) is adapted to the size of the groove (22), and the slider (23) and the groove (22) are slidably connected.

5. A multi-point testing device for hardness testing of titanium-nickel alloys according to claim 4, characterized in that, The positioning component includes a receiving groove (37) disposed on one side of the square slot (31). A V-shaped limiting plate (32) is disposed in the inner cavity of the receiving groove (37). A fixing frame (33) is fixedly installed on one side of the V-shaped limiting plate (32). The lower end of the fixing frame (33) is slidably connected to the lower end of the inner cavity of the receiving groove (37). A second lead screw sleeve (36) is fixedly installed in the middle of the fixing frame (33). A servo motor (34) is disposed on the side of the receiving groove (37) away from the square slot (31). A second lead screw (35) is installed on the drive end of the servo motor (34).

6. A multi-point testing device for hardness testing of titanium-nickel alloys according to claim 5, characterized in that, The dimensions of the second lead screw (35) are adapted to the dimensions of the second lead screw sleeve (36), and the second lead screw (35) and the second lead screw sleeve (36) are threaded together.

7. A multi-point testing device for hardness testing of titanium-nickel alloys according to claim 6, characterized in that, The central support includes a fixing strip (4) fixedly set on the outside of the positioning frame (3). There are four fixing strips (4), and the four fixing strips (4) are arranged in a ring. A wedge block (41) is fixedly installed on the outside of the fixing strip (4). A support arc plate (43) is fixedly installed on the end of the fixing strip (4) away from the square slot (31). Multiple balls (44) are rolled on the inside of the support arc plate (43). A fixing ring (42) is sleeved on the outside of the four fixing strips (4).

8. A multi-point testing device for hardness testing of titanium-nickel alloys according to claim 7, characterized in that, A rack (45) is welded to one side of the fixing ring (42). The rack (45) passes through the receiving groove (37) and is movably connected to the positioning frame (3). A gear (46) is fixedly installed at one end of the second lead screw (35) near the rack (45). The gear (46) meshes with the rack (45).

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