Hardness testing device for metal castings

Abstract

The utility model relates to metal hardness detection technical field discloses hardness detection device of metal casting, including detection machine, is provided with support platform in the detection machine inner wall, is provided with fixed assembly in support platform top, is provided with adjusting assembly in support platform bottom, adjusting assembly includes connecting block no.

Description

Technical Field

[0001] This utility model relates to the field of metal hardness testing technology, and in particular to a device for testing the hardness of metal castings. Background Technology

[0002] In the industrial production field, metal castings are important basic components of mechanical parts, and their performance directly affects the operational stability and safety of equipment. Hardness is one of the key indicators for measuring the mechanical properties of metal casting materials, and accurate hardness testing is crucial for controlling casting quality and optimizing production processes.

[0003] In the existing technology, the mechanical structure of the metal casting hardness testing device usually adopts a mode of fixed support platform combined with hardness testing probe. The support platform is mostly a planar fixed structure, which is connected to the main body of the testing equipment by bolts or buckles. Its technical principle is mainly based on single-point testing under static support, that is, using the testing probe to apply pressure to the fixed surface of the casting, and determining the hardness value by measuring parameters such as indentation depth or springback height.

[0004] However, the existing equipment has limited angle adjustment capability of the support platform, and the angle of the support platform is generally relatively fixed. This means that the hardness test can often only be performed on a single surface of the metal casting during the testing process. This can easily lead to the test results not being able to fully cover all the key parts of the casting, resulting in inaccurate test results and failing to accurately reflect the overall hardness performance of the metal casting. This affects the objective evaluation of the casting quality and the effective optimization of the production process. Therefore, a hardness testing device for metal castings is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a hardness testing device for metal castings, which aims to improve the problem that the angle of the support platform in traditional equipment is relatively fixed, and the hardness can only be tested on a single surface of the metal casting, which easily leads to inaccurate testing results.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hardness testing device for metal castings includes a testing machine, a support platform is provided on the inner wall of the testing machine, a fixing component is provided on the top of the support platform, and an adjustment component is provided on the bottom of the support platform;

[0008] The adjustment assembly includes a connecting block 1, the top of which is fixedly connected to the bottom of the support platform. A base is rotatably connected to the outer wall of the connecting block 1. The outer wall of the base is fixedly connected to the bottom of the inner wall of the testing machine. A rotating shaft is fixedly connected inside the connecting block 1. Both ends of the rotating shaft pass through the base and extend to both sides of the testing machine. A rotating ring 1 is fixedly connected to both ends of the rotating shaft. Positioning components are provided on the top of multiple rotating rings 1.

[0009] As a further description of the above technical solution:

[0010] The positioning component includes multiple locking pins, each locking pin engaging with the inside of a rotating ring. Fixed frames are fixedly connected to both sides of the testing machine. A connecting frame is fixedly connected to the inner wall of each fixed frame. A locking groove is opened inside each connecting frame. Each locking pin is slidably connected inside the fixed frame. A connecting strip is fixedly connected inside each locking pin.

[0011] As a further description of the above technical solution:

[0012] Each of the card posts is provided with a spring on its outer wall. One end of each spring is fixedly connected to the top of the inner wall of the fixing frame, and the other end of each spring is attached to the connecting strip. The top of each card post extends through to the outside of the fixing frame and is fixedly connected with a handle.

[0013] As a further description of the above technical solution:

[0014] The fixing component includes multiple clamping blocks located on the top of the support platform. A fixing plate is fixedly connected to the top of the support platform. A rotating ring is rotatably connected to the inner wall of the fixing plate. One side of the inner wall of the rotating ring extends through to the outer wall of the support platform and fits against the bottom of the support platform.

[0015] As a further description of the above technical solution:

[0016] A fixing block is fixedly connected to the top of the fixing plate, and a threaded rod is rotatably connected inside the fixing block.

[0017] As a further description of the above technical solution:

[0018] One end of the threaded rod is fixedly connected to a handle two, and a connecting block two is rotatably connected to the outer wall of the threaded rod. A limit post is fixedly connected to the bottom of the connecting block two, and the limit post is rotatably connected inside the rotating ring two.

[0019] As a further description of the above technical solution:

[0020] The top of the rotating ring 2 is fixedly connected to multiple rotating bars 2, and the top of the multiple rotating bars 2 is fixedly connected to a connecting ring. A transmission block is rotatably connected to the outer wall of each rotating bar 2, and a rotating bar 1 is rotatably connected to the inside of one side of each transmission block. The bottom ends of the multiple rotating bars 1 are fixedly connected to the top of the support platform.

[0021] As a further description of the above technical solution:

[0022] Each of the transmission blocks has a rotating bar 3 rotatably connected to its other side, and each of the rotating bars 3 has a clamping block fixedly connected to its outer wall.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the support platform is rotated around the pivot, and the bottom of the support platform is supported by a pair of connecting blocks. At the same time, the angle of the support platform is fixed by the engagement between the locking pin and the inside of the rotating ring. This achieves a targeted adjustment effect on the angle of the support platform, which solves the problem that the angle of the support platform in traditional equipment is relatively fixed, and can only perform hardness testing on a single surface of the metal casting, which easily leads to inaccurate testing results. This enhances the accuracy of the equipment in testing the hardness of metal castings.

[0025] 2. In this invention, the distance between multiple clamping blocks is adjusted by rotating the threaded rod, and the rotation of the clamping blocks allows them to better fit against the surface of the metal casting. This achieves a good fixing effect on the metal casting and solves the problem that when the surface of the metal casting is compressed, the simple contact between the metal casting and the supporting components makes it easy for the extrusion force to cause the position of the metal casting to shift, affecting the detection effect. This enhances the stability of the metal casting detection process. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the hardness testing device for metal castings proposed in this utility model;

[0027] Figure 2 This is an exploded view of the rotating shaft structure of the hardness testing device for metal castings proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the exploded structure of the clamping post of the hardness testing device for metal castings proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the clamping block structure of the hardness testing device for metal castings proposed in this utility model.

[0030] Figure 5 This is a schematic diagram of the two-section structure of the rotating ring of the hardness testing device for metal castings proposed in this utility model.

[0031] Figure 6 This is a schematic cross-sectional view of the support platform of the hardness testing device for metal castings proposed in this utility model.

[0032] Legend:

[0033] 1. Testing machine; 2. Base; 3. Connecting block one; 4. Rotating shaft; 5. Support platform; 6. Rotating ring one; 7. Fixing frame; 8. Clamping post; 9. Connecting bar; 10. Spring; 11. Connecting frame; 12. Clamping groove; 13. Handle one; 14. Connecting ring; 15. Fixing plate; 16. Fixing block; 17. Handle two; 18. Connecting block two; 19. Threaded rod; 20. Rotating bar one; 21. Transmission block; 22. Rotating bar two; 23. Rotating bar three; 24. Clamping block; 25. Limiting post; 26. Rotating ring two. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1-3 This utility model provides an embodiment of a hardness testing device for metal castings, including a testing machine 1. The testing machine 1 is mainly based on single-point testing under static support, that is, using a testing probe to apply pressure to a fixed surface of the casting, and determining the hardness value by measuring parameters such as indentation depth or springback height. This is prior art, so it will not be described in detail. The inner wall of the testing machine 1 is provided with a support platform 5. A fixing component is provided on the top of the support platform 5, and an adjustment component is provided on the bottom of the support platform 5. The fixing component is used to fix the position of the metal casting, and the adjustment component is used to change the angle of the support platform 5 to improve the testing flexibility.

[0036] The adjustment assembly includes a connecting block 3, the top of which is fixedly connected to the bottom of the support platform 5. Connecting block 3, in conjunction with base 2, provides rotational support for the support platform 5, achieving stable rotation. Connecting block 3 connects the support platform 5 and base 2, transmitting rotational force. Base 2 is rotatably connected to the outer wall of connecting block 3. Base 2, in conjunction with the inner wall of the testing machine 1, provides the mounting foundation for the support platform 5, achieving overall structural stability. Base 2 fixes the rotating shaft 4 and restricts its range of motion. The outer wall of base 2 is fixedly connected to the bottom of the inner wall of the testing machine 1. The inner wall of the testing machine 1, in conjunction with base 2, forms a closed support structure, achieving overall rigidity of the equipment. The testing machine 1 houses all functional components and provides the testing environment. The rotating shaft is fixedly connected inside connecting block 3. 4. The rotating shaft 4, in conjunction with the connecting block 3, realizes the rotation axis of the support platform 5, achieving the core transmission effect for angle adjustment. The rotating shaft 4 is used to transmit rotational force and maintain rotational balance. Both ends of the rotating shaft 4 pass through the base 2 and extend to both sides of the testing machine 1. The two ends of the rotating shaft 4, in conjunction with the rotating ring 6, form positioning fulcrums to achieve the angle locking effect. The extended part of the rotating shaft 4 is used to install positioning components to achieve multi-angle fixation. Both ends of the rotating shaft 4 are fixedly connected to the rotating ring 6. The rotating ring 6, in conjunction with the locking post 8, forms an angle positioning mechanism to achieve the indexing locking effect. The rotating ring 6 is used to provide engagement grooves to achieve angle gradation. Multiple rotating rings 6 are equipped with positioning components on their tops. The positioning components, in conjunction with the rotating rings 6, achieve the angle fixation of the support platform 5, achieving the effect of precise positioning. The component is used for quick locking and releasing of the rotating shaft 4, improving adjustment efficiency. The positioning assembly includes multiple locking pins 8, each locking pin 8 engaging with the inside of the rotating ring 6. The locking pins 8 and the grooves of the rotating ring 6 achieve mechanical interlocking, achieving an anti-loosening effect. The locking pins 8 are used to insert into the positioning holes of the rotating ring 6, forming a rigid connection. Fixed brackets 7 are fixedly connected to both sides of the testing machine 1. The fixed brackets 7, together with the connecting brackets 11, form a guide structure for the locking pins 8, achieving a smooth sliding effect. The fixed brackets 7 are used to limit the movement trajectory of the locking pins 8 and prevent deflection. Each fixed bracket 7 has a connecting bracket 11 fixedly connected to its inner wall. The connecting bracket 11, together with the slot 12, achieves secondary positioning of the connecting strip 9, achieving a double locking effect. The connecting bracket 11 is used to provide the mounting base for the spring 10. Each frame 11 has a slot 12 inside, which, together with the connecting strip 9, forms a rotation locking mechanism to prevent misoperation. The slot 12 limits the rotation angle of the connecting strip 9 to ensure precise alignment. Each locking post 8 is slidably connected inside the fixed frame 7. The locking post 8, together with the fixed frame 7, achieves axial movement for quick release. The locking post 8 transmits operating force and compresses the spring 10. Each locking post 8 has a connecting strip 9 fixedly connected inside. The connecting strip 9, together with the slot 12, achieves rotation locking to maintain the operating state. The connecting strip 9 converts the rotational movement of the handle 13 into axial fixation. Each locking post 8 has a spring 10 on its outer wall. The spring 10, together with the connecting strip 9, provides automatic reset force for rapid response.Spring 10 stores elastic potential energy and pushes the locking pin 8 to return to its original position. One end of each spring 10 is fixedly connected to the top of the inner wall of the fixing frame 7. The fixed end of the spring 10, together with the movable end, forms a preload to ensure that the locking pin 8 returns to its original position in time. The installation position of the spring 10 is used to optimize the force distribution. The other end of each spring 10 is in contact with the connecting strip 9. The movable end of the spring 10, together with the connecting strip 9, realizes force transmission to achieve a smooth operation. The contact surface of the spring 10 is used to evenly distribute pressure. The top of each locking pin 8 extends through to the outside of the fixing frame 7 and is fixedly connected to a handle 13. The handle 13, together with the locking pin 8, provides a manual operation interface for convenient control. The handle 13 is used to transmit rotational force and axial tensile force.

[0037] Reference Figures 4-6The fixing assembly includes multiple clamping blocks 24 located on the top of the support platform 5. The clamping blocks 24, in conjunction with the outer contour of the metal casting, achieve adaptive clamping to prevent slippage. The clamping blocks 24 disperse the clamping force and increase friction. A fixed plate 15 is fixedly connected to the top of the support platform 5. The fixed plate 15, together with the rotating ring 26, forms a rotating platform to achieve force transmission. The fixed plate 15 supports the clamping mechanism and provides an installation reference. The rotating ring 26 is rotatably connected to the inner wall of the fixed plate 15. The rotating ring 26, in conjunction with the limiting post 25, achieves rotational transmission to achieve synchronous movement. The rotating ring 26 converts threaded motion into rotational motion. One side of the inner wall of the rotating ring 26 extends through to the outer wall of the support platform 5 and fits against the bottom of the support platform 5. The extended portion 26, in conjunction with the support platform 5, forms a limiting structure to prevent excessive rotation. The contact surface of the rotating ring 26 is used to reduce frictional resistance. A fixed block 16 is fixedly connected to the top of the fixed plate 15. The fixed block 16, in conjunction with the threaded rod 19, forms a threaded pair mounting point to achieve force conversion. The fixed block 16 supports the handle 17 and provides a fulcrum for rotation. The threaded rod 19 is rotatably connected inside the fixed block 16. The threaded rod 19, in conjunction with the connecting block 18, achieves helical transmission to achieve precise feeding. The threaded rod 19 is used to convert rotary motion into linear motion. A handle 17 is fixedly connected to one end of the threaded rod 19. The handle 17, in conjunction with the threaded rod 19, provides a manual operation interface to achieve effortless adjustment. The handle 17 is used to amplify the operating torque. Connecting block 18 is rotatably connected to the outer wall of threaded rod 19. Connecting block 18, in conjunction with threaded rod 19, achieves helical joint motion, realizing the effect of force direction conversion. Connecting block 18 is used to connect rotating and translational components. Limiting post 25 is fixedly connected to the bottom of connecting block 18. Limiting post 25, in conjunction with rotating ring 26, provides rotational guidance and prevents connecting block 18 from rotating on its own. Limiting post 25 is used to constrain the motion trajectory. Limiting post 25 is rotatably connected inside rotating ring 26. The rotatable connection of limiting post 25, in conjunction with rotating ring 26, forms a low-friction pair, improving transmission efficiency. The installation position of limiting post 25 ensures the optimal force transmission path. Multiple rotating bars 22 are fixedly connected to the top of rotating ring 26. Rotating bars 22, in conjunction with transmission block 21, form a linkage mechanism, realizing the synchronous movement of clamping block 24. The rotating bar 22 is used to distribute driving force to each clamping point. Multiple rotating bars 22 are fixedly connected to their tops with connecting rings 14. Connecting rings 14, in conjunction with rotating bars 22, enhance structural rigidity and prevent deformation. Connecting rings 14 maintain the relative position of each rotating bar 22. Each rotating bar 22 has a rotatably connected transmission block 21 on its outer wall. Transmission blocks 21, in conjunction with rotating bars 1 and 3, form motion conversion nodes, enabling adaptive clamping angles. Transmission blocks 21 change the direction of force transmission. Rotating bars 1 20 are rotatably connected to the inside of one side of each transmission block 21. Rotating bars 1 20, in conjunction with transmission blocks 21, form a fixed rotation center, ensuring correct motion trajectory. Rotating bars 1 20 establish a static reference benchmark. The bottom ends of multiple rotating bars 1 20 are fixedly connected to the top of the support platform 5.The fixed end of the rotating bar 20, together with the support platform 5, forms a stable support structure. The installation position of the rotating bar 20 optimizes the lever arm length. A rotating bar 23 is rotatably connected to the other side of each transmission block 21. The rotating bar 23, together with the clamping block 24, achieves a floating connection, adapting to different workpiece contours. The rotating bar 23 transmits clamping force and allows angle adjustment. A clamping block 24 is fixedly connected to the outer wall of each rotating bar 23. The clamping block 24, together with the rotating bar 23, forms the final clamping end face, directly contacting the workpiece. The surface of the clamping block 24 is designed with a textured structure to increase friction.

[0038] Working principle: During the fixing process of the metal casting, the metal casting is placed on the top of the support platform 5. Then, the handle 17 is rotated to rotate the threaded rod 19. Since the connection between the connecting block 18 and the threaded rod 19 is threaded, and the limiting post 25 at the bottom of the connecting block 18 is rotatably connected to the rotating ring 26, the threaded rod 19 will drive the rotating ring 26 to rotate as well. This causes the transmission block 21 inside the rotating bar 22 to rotate around the rotating bar 20 until the clamping block 24 moves to the surface of the metal casting. The outer wall of the metal casting pushes the clamping block 24 to rotate around the rotating bar 23, making the clamping block 24 fit more closely to the outer wall of the metal casting, achieving a good fixing effect on the metal casting. This solves the problem that when the surface of the metal casting is squeezed, the simple contact relationship between the metal casting and the support component makes it easy for the squeezing force to cause the position of the metal casting to shift, affecting the detection effect. This enhances the stability of the metal casting detection process.

[0039] During the angle adjustment of the support platform 5, pull handle 13 upwards to move the locking pin 8 out of the rotating ring 6. As the locking pin 8 moves, it also moves the connecting strip 9 and compresses the spring 10. Once the locking pin 8 is completely out of the rotating ring 6, rotate handle 13 90 degrees, causing the connecting strip 9 on the outer wall of the locking pin 8 to rotate 90 degrees as well. Since the connecting strip 9 is in contact with one end of the spring 10, its rotation does not affect the spring 10. Next, release the pulling force on handle 13. The spring 10's rebound force pushes the connecting strip 9 into engagement with the inner wall of the slot 12 inside the connecting frame 11, thus locking the locking pin. With position 8 fixed, the support platform 5 is then rotated around the pivot 4 until the appropriate angle is achieved. Following the same principle, handle 13 is pulled upwards and rotated 90 degrees in the opposite direction, causing the connecting strip 9 to disengage from the slot 12. The rebound force of connecting block 18 pushes the locking post 8 into the internal groove of the rotating ring 6, thus fixing the angle of the support platform 5. This achieves targeted adjustment of the angle of the support platform 5, solving the problem that the angle of the support platform 5 in traditional equipment is relatively fixed, and hardness testing can only be performed on a single surface of the metal casting, which easily leads to inaccurate testing results. This enhances the accuracy of the equipment in testing the hardness of metal castings.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hardness testing device for metal castings, comprising a testing machine (1), characterized in that: The inner wall of the testing machine (1) is provided with a support platform (5), the top of the support platform (5) is provided with a fixing component, and the bottom of the support platform (5) is provided with an adjustment component; The adjustment assembly includes a connecting block (3), the top of which is fixedly connected to the bottom of the support platform (5). The outer wall of the connecting block (3) is rotatably connected to a base (2). The outer wall of the base (2) is fixedly connected to the bottom of the inner wall of the testing machine (1). The connecting block (3) is fixedly connected to a rotating shaft (4). The two ends of the rotating shaft (4) pass through the base (2) and extend to both sides of the testing machine (1). Both ends of the rotating shaft (4) are fixedly connected to rotating rings (6). The top of the multiple rotating rings (6) is provided with positioning components.

2. The hardness testing device for metal castings according to claim 1, characterized in that: The positioning component includes multiple locking pins (8), each locking pin (8) engaging with the inside of the rotating ring (6). The testing machine (1) is fixedly connected to two sides of a fixed frame (7), and a connecting frame (11) is fixedly connected to the inner wall of each fixed frame (7). Each connecting frame (11) has a slot (12) inside, each locking pin (8) is slidably connected to the inside of the fixed frame (7), and a connecting strip (9) is fixedly connected inside each locking pin (8).

3. The hardness testing device for metal castings according to claim 2, characterized in that: Each of the card posts (8) is provided with a spring (10) on its outer wall. One end of each spring (10) is fixedly connected to the top of the inner wall of the fixing frame (7). The other end of each spring (10) is attached to the connecting strip (9). The top of each card post (8) extends through to the outside of the fixing frame (7) and is fixedly connected with a handle (13).

4. The hardness testing device for metal castings according to claim 1, characterized in that: The fixing component includes multiple clamping blocks (24), which are located on the top of the support platform (5). A fixing plate (15) is fixedly connected to the top of the support platform (5). A rotating ring (26) is rotatably connected to the inner wall of the fixing plate (15). One side of the inner wall of the rotating ring (26) extends through to the outer wall of the support platform (5) and fits against the bottom of the support platform (5).

5. The hardness testing device for metal castings according to claim 4, characterized in that: A fixing block (16) is fixedly connected to the top of the fixing plate (15), and a threaded rod (19) is rotatably connected inside the fixing block (16).

6. The hardness testing device for metal castings according to claim 5, characterized in that: One end of the threaded rod (19) is fixedly connected to a handle two (17), and the outer wall of the threaded rod (19) is rotatably connected to a connecting block two (18). The bottom of the connecting block two (18) is fixedly connected to a limit post (25), and the limit post (25) is rotatably connected inside the rotating ring two (26).

7. The hardness testing device for metal castings according to claim 6, characterized in that: The top of the rotating ring 2 (26) is fixedly connected to multiple rotating bars 2 (22), and the top of the multiple rotating bars 2 (22) is fixedly connected to a connecting ring (14). The outer wall of each rotating bar 2 (22) is rotatably connected to a transmission block (21). The inside of one side of the transmission block (21) is rotatably connected to a rotating bar 1 (20). The bottom ends of the multiple rotating bars 1 (20) are fixedly connected to the top of the support platform (5).

8. The hardness testing device for metal castings according to claim 7, characterized in that: Each of the transmission blocks (21) has a rotating bar (23) rotatably connected to its other side, and each of the rotating bars (23) has a clamping block (24) fixedly connected to its outer wall.

Images