Rapid detection device for evaluating electromagnetic homogenization treatment effect of hard alloy

Abstract

The utility model provides a rapid detection device for evaluating the electromagnetic homogenization treatment effect of hard alloy, which comprises a base, the base is connected with an objective table through a support assembly, the objective table is arranged above the base, the upper end face of the objective table is provided with a ball passing hole for a steel ball to pass through, the ball passing hole is vertically arranged, and the ball passing hole is provided with a ball hole. The supporting assembly is provided with a moving platform capable of vertically moving, the moving platform is provided with a mounting groove used for mounting a hard alloy test piece, when the hard alloy test piece is mounted in the mounting groove, the outer side end of the hard alloy test piece is located under the ball through hole, a lifting platform is arranged on the outer side of the base, and a high-speed camera is mounted on the lifting platform. The high-speed camera corresponds to the mounting groove in position and shoots the outer side end of the hard alloy. A mechanical ball falling and digital image method is adopted, the later correction redundancy is large, and the error-tolerant rate is high; the device is simple in structure and convenient to build, can be carried out in a conventional environment, does not need additional shielding, and is wider in application environment.

Description

Technical Field

[0001] The utility model relates to the technical field of cemented carbide detection, in particular to a rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide. Background Technique

[0002] Electromagnetic homogenization of cemented carbide is a technical means in the production process of cemented carbide to achieve uniform mixing of raw materials or homogenization treatment of the alloy microstructure by using the electromagnetic principle. After electromagnetic homogenization treatment, the properties of the cemented carbide material change, and the defect distribution at the interface between tungsten carbide particles and cobalt phase becomes more uniform, thus improving the material properties. However, the improvement effect of material properties cannot be intuitively reflected. Therefore, quickly evaluating the effect of electromagnetic homogenization is a key issue in industrial production. Content of the Utility Model

[0003] Aiming at the problem that the effect of electromagnetic homogenization cannot be quickly evaluated, the utility model provides a rapid detection device for evaluating the effect of electromagnetic homogenization of cemented carbide, which has flexible sampling positions, low test costs and high fault tolerance.

[0004] The utility model provides the following technical solution: A rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide, including a base. The base is connected with a loading platform through a support component. The loading platform is arranged above the base. A through-hole for a steel ball to pass through is arranged on the upper end surface of the loading platform, and the through-hole is arranged vertically. A movable platform that can move vertically is arranged on the support component. An installation groove for installing a cemented carbide test piece is arranged on the movable platform. When the cemented carbide test piece is installed in the installation groove, the outer side end of the cemented carbide test piece is located directly below the through-hole. A lifting platform is arranged outside the base, and a high-speed camera is installed on the lifting platform. The high-speed camera corresponds to the position of the installation groove, and the high-speed camera photographs the outer side end of the cemented carbide.

[0005] Compared with the prior art, the advantages of the utility model are as follows: The ball-drop loading device of the cemented carbide test piece, combined with the high-speed camera, can obtain the quantitative value of the amplitude of the cemented carbide test piece under instantaneous impact conditions. By comparing the amplitude change values before and after electromagnetic homogenization, the effect of electromagnetic homogenization can be quickly evaluated. The mechanical ball-drop and digital image method has a large redundancy for later correction and a high fault tolerance rate; The device has a simple structure, is easy to build, can be carried out in a conventional environment, does not require external shielding, and has a wider applicable environment.

[0006] In some embodiments, a guiding groove for accommodating the steel ball is arranged on the loading platform. The guiding groove includes a accommodating part and a guiding part. One end of the guiding part is connected to the accommodating part, and the other end of the guiding part is connected to the through-hole. The diameter of the guiding part is larger than the diameter of the steel ball, and the difference in their diameters is Z, where 0 cm < Z < 0.1 mm. Through the above improvement, the arrangement of the guiding groove makes the movement of the steel ball in the guiding groove more stable and the experimental data more accurate.

[0007] In some embodiments, the roughness Ra of the outer end face of the cemented carbide specimen is ≤0.05μm, and the outer end face of the cemented carbide specimen is marked with laser speckle, with the speckle lines linearly distributed along the horizontal direction. Through the above improvement, the outer end face of the cemented carbide specimen becomes mirror-like, making the speckle lines clearer.

[0008] In some embodiments, the support assembly includes a vertically arranged lead screw, and the moving platform is provided with a threaded hole for cooperating with the lead screw. The moving platform is sleeved on the lead screw through the threaded hole, and the helical motion of the lead screw is converted into the linear motion of the moving platform. Through the above improvement, the vertical motion of the moving platform is realized by the rotation of the lead screw, which has a simple structure and strong stability.

[0009] In some embodiments, the support component includes a fixed bracket with guide rails on its front and rear sides. A slider that cooperates with the guide rails is provided on the moving platform, and the slider is fixed to the moving platform. With the above improvement, guide rails are provided on both the front and rear sides of the fixed bracket to prevent the moving platform from shaking during movement. The cooperation between the guide rails and the slider makes the movement of the moving platform more stable.

[0010] In some embodiments, the support assembly includes a drive motor, the output end of which is connected to an output gear, and the lower end of a transmission screw is connected to an input gear. The output gear and the input gear are connected by a synchronous belt. With this improvement, the transmission screw is rotated by the drive motor, making operation more convenient and labor-saving.

[0011] In some embodiments, the mounting groove is provided with a fixing hole, and the cemented carbide test piece is provided with a positioning hole that mates with the fixing hole. The fixing hole and the positioning hole are connected by a connecting bolt. With the above improvement, the cemented carbide test piece is fixed by the connecting bolt, which makes disassembly and assembly convenient.

[0012] In some embodiments, a buffer pad is provided in the mounting groove. Through this improvement, the buffer pad is provided to prevent the hard alloy test piece from causing hard friction and collision with the mounting groove, resulting in a longer service life.

[0013] This utility model provides a rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide. It adopts a mechanical ball dropping method and digital image method, with large redundancy in post-correction and high fault tolerance. The device drives the transmission screw to rotate through the drive motor, realizing the vertical movement of the moving platform. At the same time, the lifting platform moves the high-speed camera to the horizontal plane corresponding to the moving platform. The overall structure is simple, easy to build, can be carried out in normal environment, does not require external shielding, and has a wider range of applicable environments. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a top view of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the support component of this utility model;

[0018] Figure 4 This is a structural schematic diagram of the support component of this utility model from another angle;

[0019] Figure 5 This is a cross-sectional structural schematic diagram of the support component of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the cemented carbide test piece and the mobile platform of this utility model.

[0021] Figure 7 This is a schematic diagram of the mounting groove of this utility model;

[0022] Figure 8 This is a schematic diagram of the structure of the cemented carbide test piece of this utility model.

[0023] In the diagram: 1. Base; 2. Support assembly; 21. Drive screw; 22. Fixed bracket; 23. Guide rail; 24. Drive motor; 25. Input gear; 26. Output gear; 27. Synchronous belt; 3. Stage; 31. Ball hole; 32. Guide groove; 321. Receiving part; 322. Guide part; 4. Moving platform; 41. Mounting groove; 411. Fixing hole; 42. Threaded hole; 43. Slider; 44. Buffer pad; 5. Lifting platform; 6. High-speed camera; 7. Hard alloy test piece; 71. Positioning hole; 8. Connecting bolt. Detailed Implementation

[0024] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0025] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0027] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0028] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0029] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0030] Please see Figure 1-2As shown in the present embodiment: A rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide includes a base 1. The base 1 is connected to a loading platform 3 through a support assembly 2. The loading platform 3 is arranged above the base 1. A through-hole 31 for the steel ball to pass through is provided on the upper end surface of the loading platform 3. The through-hole 31 is vertically arranged. A movable platform 4 that can move vertically is provided on the support assembly 2. An installation groove 41 for installing a cemented carbide specimen 7 is provided on the movable platform 4. When the cemented carbide specimen 7 is installed in the installation groove 41, the outer end of the cemented carbide specimen 7 is located directly below the through-hole 31. A lifting platform 5 is provided outside the base 1. A high-speed camera 6 is installed on the lifting platform 5. The position of the high-speed camera 6 corresponds to that of the installation groove 41. The high-speed camera 6 photographs the outer end of the cemented carbide.

[0031] The ball-drop loading device of the cemented carbide specimen 7, combined with the high-speed camera 6, can obtain the quantitative value of the amplitude of the cemented carbide specimen 7 under instantaneous impact conditions. By comparing the amplitude change values before and after electromagnetic homogenization, the effect of electromagnetic homogenization can be quickly evaluated. The mechanical ball-drop and digital image method has a large redundancy in later correction and a high error tolerance rate; the structure of this device is simple and easy to build, can be carried out in a conventional environment, without additional shielding, and has a wider applicable environment.

[0032] It should be noted that the lifting platform 5 is a hydraulic lifting column.

[0033] In some embodiments, as Figure 2 shown, a guiding groove 32 for accommodating the steel ball is provided on the loading platform 3. The guiding groove 32 includes a accommodating part 321 and a guiding part 322. One end of the guiding part 322 is connected to the accommodating part 321, and the other end of the guiding part 322 is connected to the through-hole 31. The diameter of the guiding part 322 is larger than the diameter of the steel ball, and the difference in their diameters is Z, where 0 cm < Z < 0.1 mm. It should be noted that the setting of the guiding groove 32 makes the movement of the steel ball in the guiding groove 32 more stable and the experimental data more accurate.

[0034] In some embodiments, as Figure 2 shown, the surface roughness Ra of the outer end face of the cemented carbide specimen 7 is ≤ 0.05 μm. Laser marking speckles are used on the outer end face of the cemented carbide specimen 7. The speckle lines are linearly distributed along the horizontal direction. It should be noted that the outer end face of the cemented carbide specimen 7 is mirror-like, making the speckle lines clearer.

[0035] It should be pointed out that: the thickness h of the cemented carbide specimen 7 is ≤ 1 mm, the width d is ≤ 3 mm, and the length L ≥ 15d. That is, the smaller the stiffness of the specimen, the larger the deformation amplitude, which is convenient for detection.

[0036] In some embodiments, as Figures 3-5As shown, the support assembly 2 includes a vertically arranged transmission screw 21. The moving platform 4 is provided with a threaded hole 42 for cooperating with the transmission screw 21. The moving platform 4 is sleeved on the transmission screw 21 through the threaded hole 42. The helical motion of the transmission screw 21 is converted into the linear motion of the moving platform 4. It should be noted that the vertical motion of the moving platform 4 is achieved by the rotation of the transmission screw 21. The structure is simple and the stability is strong.

[0037] In some embodiments, such as Figures 3-5 As shown, the support component 2 includes a fixed bracket 22, and guide rails 23 are provided on the front and rear sides of the fixed bracket 22. The moving platform 4 is provided with a slider 43 that cooperates with the guide rails 23. The slider 43 is fixed on the moving platform 4. It should be noted that the fixed bracket 22 is provided with guide rails 23 on both the front and rear sides to prevent the moving platform 4 from shaking during the movement. The cooperation between the guide rails 23 and the slider 43 makes the movement of the moving platform 4 more stable.

[0038] In some embodiments, such as Figures 3-5 As shown, the support assembly 2 includes a drive motor 24, the output end of the drive motor 24 is connected to an output gear 26, the lower end of the transmission screw 21 is connected to an input gear 25, and the output gear 26 and the input gear 25 are connected by a synchronous belt 27. It should be noted that the drive motor 24 makes the transmission screw 21 rotate, making the operation more convenient and labor-saving.

[0039] In some embodiments, such as Figures 6-8 As shown, the mounting groove 41 is provided with a fixing hole 411, and the cemented carbide test piece 7 is provided with a positioning hole 71 that mates with the fixing hole 411. The fixing hole 411 and the positioning hole 71 are connected by a connecting bolt 8. It should be noted that the cemented carbide test piece 7 is fixed by the connecting bolt 8, which makes disassembly and assembly convenient.

[0040] In some embodiments, such as Figures 6-8 As shown, a buffer pad 44 is provided in the mounting groove 41. It should be noted that the buffer pad 44 is provided to prevent the hard alloy test piece 7 from causing hard friction and collision with the mounting groove 41, thus extending its service life.

[0041] Workflow: S1. Prepare cemented carbide test pieces. All six sides need to be ground and polished to a mirror finish, i.e., roughness Ra≤0.05μm;

[0042] S2. Prepare imaging speckle by using a laser to mark the speckle at the end, using linear speckle with speckle lines distributed along the horizontal direction;

[0043] S3. Clamp the sample. Use connecting bolts 8 to fix the prepared cemented carbide sample 7 into the mounting groove 41 of the moving platform 4. Use a high-speed camera 6 to assist in leveling the sample.

[0044] S4. Verify the imaging system of the high-speed camera 6 and check the clarity of the speckle on the hard alloy test piece 7.

[0045] S5. Start the high-speed camera 6;

[0046] S6. Drop a steel ball to impact the cemented carbide test piece 7;

[0047] S7. Using a CCD imaging system and the DIC method, calculate and obtain the amplitude value of the cemented carbide specimen 7;

[0048] S8, cemented carbide specimen 7, electromagnetic homogenization treatment, demagnetization;

[0049] S9. Repeat the aforementioned measurement steps;

[0050] S10. Compare the relative changes in amplitude values ​​of cemented carbide specimen 7 before and after electromagnetic homogenization to evaluate the effect of electromagnetic homogenization.

[0051] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A rapid detection device for evaluating the effect of electromagnetic homogenization treatment on cemented carbide, characterized in that: The system includes a base (1), which is connected to a platform (3) via a support assembly (2). The platform (3) is located above the base (1). The upper surface of the platform (3) is provided with a ball-passing hole (31) for steel balls to pass through. The ball-passing hole (31) is vertically arranged. The support assembly (2) is provided with a vertically movable platform (4). The movable platform (4) is provided with an installation groove (41) for installing a cemented carbide test piece (7). When the cemented carbide test piece (7) is installed in the installation groove (41), the outer end of the cemented carbide test piece (7) is located directly below the ball-passing hole (31). The base (1) is provided with a lifting platform (5). A high-speed camera (6) is installed on the lifting platform (5). The high-speed camera (6) is positioned corresponding to the installation groove (41). The high-speed camera (6) captures images of the outer end of the cemented carbide test piece (7).

2. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 1, characterized in that: The stage (3) is provided with a guide groove (32) for accommodating a steel ball. The guide groove (32) includes an accommodating part (321) and a guide part (322). One end of the guide part (322) is connected to the accommodating part (321), and the other end of the guide part (322) is connected to the ball passage hole (31). The diameter of the guide part (322) is larger than the diameter of the steel ball, and the difference between the two diameters is Z = 0 cm. <Z<0.1mm。 3. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 1, characterized in that: The roughness Ra of the outer end face of the cemented carbide specimen (7) is ≤0.05μm. The outer end face of the cemented carbide specimen (7) is marked with laser speckle, and the speckle lines are linearly distributed along the horizontal direction.

4. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 1, characterized in that: The support assembly (2) includes a vertically arranged transmission screw (21). The moving platform (4) is provided with a threaded hole (42) for cooperating with the transmission screw (21). The moving platform (4) is sleeved on the transmission screw (21) through the threaded hole (42), and the helical motion of the transmission screw (21) is converted into the linear motion of the moving platform (4).

5. A rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 4, characterized in that: The support component (2) includes a fixed bracket (22), and the fixed bracket (22) has guide rails (23) on its front and rear sides. The mobile platform (4) is provided with a slider (43) that cooperates with the guide rails (23), and the slider (43) is fixed on the mobile platform (4).

6. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 4, characterized in that: The support assembly (2) includes a drive motor (24), the output end of which is connected to an output gear (26), and the lower end of the transmission screw (21) is connected to an input gear (25). The output gear (26) and the input gear (25) are connected by a synchronous belt (27).

7. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 1, characterized in that: The mounting groove (41) is provided with a fixing hole (411), and the hard alloy test piece (7) is provided with a positioning hole (71) that mates with the fixing hole (411). The fixing hole (411) and the positioning hole (71) are connected by a connecting bolt (8).

8. The rapid detection device for evaluating the effect of electromagnetic homogenization treatment of cemented carbide according to claim 1, characterized in that: The mounting groove (41) is provided with a buffer pad (44).

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