Special detection tool for detecting hardness of hard alloy holding-up hammer

Abstract

The invention relates to the technical field of material hardness detection, in particular to a special detection tool for hard alloy holding-up hammer hardness detection, which comprises a detector, and the detector comprises a lifting platform for placing a holding-up hammer; the special detecting tool for detecting the hardness of the hard alloy holding-up hammer further comprises a bearing unit, the bearing unit is arranged on the lifting table and comprises a supporting piece arranged above the lifting table, and a bearing part used for placing the holding-up hammer is installed on the supporting piece. The leveling unit is matched with the bearing unit, it can be ensured that the leveling lower pressing plate in the leveling unit is attached to the detected face of the holding-up hammer, then it is ensured that the detected face of the holding-up hammer is in the horizontal state, a clamp does not need to be manually adjusted in advance, and the working efficiency is improved. The change from the mode that the clamp actively controls the levelness of the holding-up hammer detection face to the mode that the clamp is attached to the horizontal detection face in a self-adaptive mode is achieved, and the risk of levelness deviation caused by clamp abrasion is avoided.

Description

Technical Field

[0001] This invention relates to the field of material hardness testing technology, and in particular to a special tool for testing the hardness of a cemented carbide hammer. Background Technology

[0002] The cemented carbide top hammer is a key component in the high-temperature and high-pressure synthesis of synthetic diamonds and lab-grown diamonds. Its hardness directly determines the stability of equipment operation, the quality of synthesized products, and the service life of the top hammer itself. Therefore, it is necessary to conduct accurate hardness testing on the cemented carbide top hammer to provide data support for product qualification and performance optimization.

[0003] Currently, hardness testing of cemented carbide hammers primarily employs the indentation method. This method involves applying a specific load to the hammer's testing surface to create an indentation, and then calculating the hardness value by measuring the indentation size. The accuracy of the test results depends on the levelness of the hammer's testing surface and the stability of the hammer's support during the testing process. To ensure the levelness of the tested surface of the cemented carbide hammer, existing hardness testing methods often use specialized fixtures in conjunction with a testing instrument. However, these fixtures are mostly fixed or rotatable structures. During testing, the hammer's testing surface must be manually adjusted beforehand to ensure it is level. Furthermore, the fixture's positioning components bear the hammer's load and experience friction from repeated adjustments over extended periods. The friction can easily cause wear and deformation, leading to irreversible shifts in the positioning reference. This, in turn, causes a shift in the levelness of the surface being tested by the carbide hammer. Furthermore, rotatable fixtures, in order to facilitate the rotation of the carbide hammer, typically only support it through two rotating shafts. This results in few support points and poor force distribution. After prolonged use, the carbide hammer is prone to posture shifts and slight wobbling during hardness testing, thus affecting the accuracy of the test results. In addition, existing fixtures require significant adjustments to the fixture's state before installing the carbide hammer when changing the surface being tested, increasing the number of testing steps and reducing overall testing efficiency.

[0004] Therefore, there is an urgent need to provide a special inspection tool that can improve the accuracy and efficiency of hardness testing of cemented carbide top hammers. Summary of the Invention

[0005] Therefore, it is necessary to provide a special tool for testing the hardness of cemented carbide hammers, which aims to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a special tool for testing the hardness of a cemented carbide top hammer, comprising: a testing instrument, the testing instrument including a lifting platform for placing the top hammer.

[0007] The special tool for testing the hardness of a cemented carbide hammer also includes a support unit, which is set on a lifting platform. The support unit includes a support member set above the lifting platform, and a support part for placing the hammer is installed on the support member.

[0008] The special tool for testing the hardness of a cemented carbide top hammer also includes a leveling unit. The leveling unit is set on the support and includes a leveling lower pressure plate set above the support. A level is installed on the upper end of the leveling lower pressure plate, and two telescopic parts are symmetrically installed on the lower end of the leveling lower pressure plate. The telescopic parts are detachably connected to the support and are provided with a buckle for locking the telescopic parts after length adjustment.

[0009] When inspecting the working surface of the top hammer, the support part maintains a horizontal posture. The leveling lower pressure plate abuts against the working surface of the top hammer and applies downward pressure. After the support part is subjected to force, it transfers the load to the support component. The support component simultaneously provides rigid support to the support part. At the same time, the leveling lower pressure plate maintains a horizontal state through the telescopic part and completes the automatic leveling of the working surface of the top hammer. When inspecting the cone surface of the top hammer, the support part is pushed to an inclined state. The support part drives the cone surface of the top hammer toward the leveling lower pressure plate. The leveling lower pressure plate abuts against the cone surface of the top hammer and applies downward pressure. During the descent of the leveling lower pressure plate, the cone surface of the top hammer is gradually leveled. The support component simultaneously provides rigid support to the support part.

[0010] Preferably, the support unit includes a movable part for controlling the lateral movement of the support member and is detachably mounted on the lifting platform.

[0011] Preferably, the support portion includes two sliding rods symmetrically distributed front to back and slidably passing through the support member. A rotating frame is installed at the upper end of each sliding rod, and a rotating ring is installed between the two rotating frames. A support frame for placing the top hammer is rotatably connected to the inner ring surface of the rotating ring.

[0012] Preferably, the movable part includes a positioning frame detachably mounted on the lifting platform. The positioning frame has an upward-facing U-shaped structure. Two horizontally placed guide rods are installed inside the positioning frame. A sliding block is slidably passed through the two guide rods. The upper end of the sliding block is fixedly connected to the support member. An adjusting screw is threadedly connected to the middle of the sliding block. The two ends of the adjusting screw are rotatably connected to the two side walls of the positioning frame.

[0013] Preferably, the telescopic part includes a sliding sleeve installed at the lower end of the leveling lower pressure plate, a support rod slidably connected inside the sliding sleeve, an mounting plate installed at the lower end of the support rod, the mounting plate being detachably installed on the support member, and a support spring installed between the upper end of the support rod and the lower end of the leveling lower pressure plate.

[0014] Preferably, the latching part includes two latching holes symmetrically opened on the sliding sleeve along the axis of the sliding sleeve, and a return sink hole is opened at the lower end of the support rod. Two latching parts symmetrically distributed along the axis of the support rod slide through the wall of the return sink hole, and a return spring is installed between the two latching parts.

[0015] Preferably, the latching component consists of a movable plate, a latching block, and a pressing block. The movable plate is located in the retraction recess and is fixedly connected to the return spring. The latching block and the pressing block are respectively installed from top to bottom at the end of the movable plate away from the axis of the support rod. Both the latching block and the pressing block slide through the support rod.

[0016] Preferably, the rotating position of the rotating frame is provided with a torsion spring.

[0017] Preferably, the inner circumferential surface of the support frame is equipped with a plurality of circumferentially evenly distributed rubber protrusions.

[0018] In summary, the present invention has the following beneficial technical effects: 1. The leveling unit and the support unit used in the present invention cooperate to ensure that the leveling lower pressure plate in the leveling unit fits the surface to be tested of the top hammer, thereby ensuring that the surface to be tested of the top hammer is in a horizontal state. There is no need for manual pre-adjustment of the fixture, realizing the transformation from the fixture actively controlling the horizontality of the top hammer's testing surface to the fixture adaptively fitting the horizontal testing surface, avoiding the risk of horizontality deviation caused by fixture wear. In addition, the support unit can provide multi-point rigid support for the top hammer in any state, ensuring that the top hammer maintains a stable posture during hardness testing, and ensuring the accuracy of the test results.

[0019] 2. The leveling unit and support unit used in this invention can simultaneously meet the hardness testing requirements of the working surface and the conical surface of the top hammer. When testing different end faces of the top hammer, there is no need to significantly change the state of the clamp. Automatic leveling can be completed simply by pushing the top hammer and pressing down with the leveling plate. This simplifies the steps of changing the surface of the top hammer being tested, avoids repeated clamping and adjustment of the top hammer, and improves the overall testing efficiency. Attached Figure Description

[0020] 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0022] Figure 2 A front view of the present invention is shown.

[0023] Figure 3 A schematic diagram of the structure of the support unit and leveling unit of the present invention is shown.

[0024] Figure 4 A cross-sectional view of the support unit and leveling unit of the present invention is shown.

[0025] Figure 5 A cross-sectional view of the telescopic part and the snap-fit ​​part of the present invention is shown.

[0026] Figure 6 A schematic diagram of the present invention for hardness testing of a top hammer is shown.

[0027] Figure 7 This diagram illustrates the working principle of the present invention for detecting the hardness of the working surface of the top hammer.

[0028] Figure 8 This diagram illustrates the working principle of the present invention for detecting the conical surface hardness of a top hammer.

[0029] The above-mentioned figures include the following reference numerals: 1. Detector; 10. Lifting platform; 2. Support unit; 20. Support member; 21. Support part; 210. Sliding rod; 211. Rotating frame; 212. Rotating ring; 213. Support frame; 22. Moving part; 220. Positioning frame; 221. Guide rod; 222. Sliding block; 223. Adjusting screw; 3. Leveling unit; 30. Leveling lower pressure plate; 31. Level; 32. Telescopic part; 320. Sliding sleeve; 321. Support rod; 322. Support spring; 33. Buckle part; 330. Snap hole; 331. Retraction countersunk hole; 332. Return spring; 333. Moving plate; 334. Snap block; 335. Pressing block. Detailed Implementation

[0030] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways not described herein, and those skilled in the art can make similar modifications without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] See Figure 1 and Figure 2 A special fixture for testing the hardness of a cemented carbide hammer includes a testing instrument 1. The testing instrument 1 includes a frame, a lifting platform 10 for placing the hammer, and an indenter system that directly contacts the workpiece to be tested and forms an indentation. The indenter system is equipped with a pressure sensor that monitors the intensity of the pressure applied by the indenter system to the hammer. The frame also includes a loading system for the power source of the hardness test and a measuring system for collecting the indentation (this is prior art).

[0032] See Figure 1 , Figure 3 and Figure 4The special tool for testing the hardness of the carbide top hammer also includes a support unit 2 set on the lifting platform 10. The support unit 2 includes a support member 20 set above the lifting platform 10. The support member 20 is an existing flexible clamp. The support member 20 is composed of a groove base, telescopic positioning pin, clamp, locking handle, etc. The support member 20 is equipped with a support part 21 for placing the top hammer.

[0033] See Figure 1 , Figure 3 and Figure 4 The special tool for testing the hardness of the carbide top hammer also includes a leveling unit 3 set on the support member 20. The leveling unit 3 includes a leveling lower pressure plate 30 set above the support member 20. A level 31 is installed on the upper end of the leveling lower pressure plate 30. It should be noted that the total thickness of the leveling lower pressure plate 30 and the level 31 must be less than the thickness of the pressure head system of the testing instrument 1. The level 31 measures the levelness of the leveling lower pressure plate 30 itself to ensure that the surface to be tested by the top hammer is in a horizontal state after it is in contact with the leveling lower pressure plate 30. The level 31 can be an existing bubble level or an electronic level. Two telescopic parts 32 are symmetrically installed at the lower end of the leveling lower pressure plate 30. The telescopic parts 32 are detachably connected to the support member 20. The telescopic parts 32 are provided with a buckle part 33 for locking the telescopic parts 32 after length adjustment.

[0034] In practical work, when inspecting the working surface of the top hammer, the top hammer is placed on the support part 21 that maintains a horizontal posture (e.g., Figure 6 As shown), the leveling lower pressure plate 30 abuts against the working surface of the top hammer and applies downward pressure. After the support part 21 is subjected to force, it transmits the load to the support member 20. The support member 20 simultaneously provides multi-point rigid support to the support part 21 to form a balanced constraint, effectively ensuring the uniformity of force and the stability of posture of the top hammer during testing. At the same time, when the leveling lower pressure plate 30 descends, it maintains a horizontal state through the telescopic part 32. The leveling lower pressure plate 30 directly contacts the working surface of the top hammer, and the top hammer can be rotated through the support part 21 to make the leveling lower pressure plate 30 closely adhere to the working surface of the top hammer, thereby completing the function of automatic leveling of the working surface of the top hammer and ensuring that the working surface of the top hammer is in a horizontal state during hardness testing (e.g., Figure 7 As shown in the figure, this further improves the accuracy of hardness test results.

[0035] When inspecting the cone surface of the top hammer, the top hammer is placed inside the support 21 and pushed to an inclined state. The support 21 causes the cone surface of the top hammer to face the leveling lower pressure plate 30. The leveling lower pressure plate 30 abuts against the cone surface of the top hammer and applies downward pressure. As the leveling lower pressure plate 30 descends, it gradually pushes the top hammer, causing the cone surface of the top hammer to move downward under force and rotate through the support 21 to a horizontal state (e.g., Figure 8As shown), this completes the function of leveling the top hammer cone surface without the need for pre-adjustment of the fixture, reducing the number of operation steps. Furthermore, the leveling lower pressure plate 30 is directly in close contact with the top hammer cone surface, ensuring that the adjusted top hammer cone surface is in a horizontal state. This realizes the transformation from the fixture actively controlling the horizontality of the top hammer detection surface to the fixture adaptively fitting the horizontal detection surface, without the need for additional fixture state change operations. It can also avoid the risk of horizontal deviation after the top hammer is placed due to fixture wear. Simultaneously, the support member 20 forms a rigid support for the support part 21.

[0036] See Figure 3 and Figure 4 The supporting part 21 includes two sliding rods 210 that are symmetrically distributed front and back and slidably pass through the support member 20. A rotating frame 211 is installed at the upper end of each of the two sliding rods 210. A torsion spring is provided at the rotation position of the rotating frame 211. A rotating ring 212 is installed between the two rotating frames 211. A supporting frame 213 for placing the top hammer is rotatably connected to the inner ring surface of the rotating ring 212. A plurality of circumferentially evenly distributed rubber protrusions are installed on the inner ring surface of the supporting frame 213.

[0037] In actual operation, initially, the support member 20 supports the support frame 213. The torsion springs in the two rotating frames 211 provide limiting constraints on the rotating ring 212 and the support frame 213, ensuring that the support frame 213 remains horizontal under its own weight. The hammer to be tested is manually placed inside the support frame 213. Multiple rubber protrusions are in close contact with the annular surface of the hammer, and the friction between the rubber protrusions and the hammer limits its position, preventing shaking or separation between the hammer and the support frame 213. The support frame 213 is rotatably connected to the rotating ring 212. When testing the hardness of the hammer's working surface, the hammer is only subjected to vertical force. There will be no mutual rotation between 12, thus not affecting the detection of the working surface of the top hammer; when performing hardness testing on the conical surface of the top hammer, it is only necessary to push the top hammer placed in the support frame 213 to rotate, so that most of the top hammer conical surface faces the leveling lower pressure plate 30. That is, the working surface of the top hammer is prevented from returning to its original position during the pressing down of the leveling lower pressure plate 30. Because the support frame 213 and the rotating ring 212 are rotatably connected, the leveling lower pressure plate 30 can simultaneously drive the top hammer to rotate along the rotating frame 211 and along the axis of the rotating ring 212 during the pressing down, thereby eliminating the lateral and longitudinal angles between the top hammer conical surface and the leveling lower pressure plate 30, realizing the function of automatic leveling of the top hammer conical surface, simplifying the positioning and calibration steps of the top hammer placement, and simplifying the steps of top hammer hardness testing.

[0038] See Figure 3 , Figure 4 and Figure 5The telescopic part 32 includes a sliding sleeve 320 installed at the lower end of the leveling lower pressure plate 30. The inner ring surface of the lower end of the sliding sleeve 320 is provided with an annular inclined surface. A support rod 321 is slidably connected inside the sliding sleeve 320. An mounting plate is installed at the lower end of the support rod 321. The mounting plate is detachably installed on the support member 20. A support spring 322 is installed between the upper end of the support rod 321 and the lower end of the leveling lower pressure plate 30.

[0039] In actual operation, in the initial state, the two support springs 322 support and limit the leveling lower pressure plate 30, keeping it away from the support frame 213 to provide space for the placement of the top hammer. After the top hammer is placed in the support frame 213, when performing the hardness test of the working surface of the top hammer, the leveling lower pressure plate 30 is pressed down. The leveling lower pressure plate 30 descends along the guide of the two sliding sleeves 320 and squeezes the two support springs 322. The leveling lower pressure plate 30 gradually comes into contact with the working surface of the top hammer and continues to push the top hammer, causing the support frame 213 and the rotating ring 212 to move downward. The rotating ring 212 drives the two sliding rods 210 to slide through the two rotating frames 211. At the same time, the bottom of the horizontal support frame 213 squeezes the multiple telescopic positioning pins on the support member 20. Similarly, when performing the hardness test of the cone surface of the top hammer, the inclined support frame 213 and the top hammer squeeze the multiple telescopic positioning pins on the support member 20.

[0040] See Figure 3 , Figure 4 and Figure 5 The latching part 33 includes two latching holes 330 symmetrically opened on the sliding sleeve 320 along the axis of the sliding sleeve 320. The lower end of the support rod 321 is provided with a return sink hole 331. Two latching members symmetrically distributed along the axis of the support rod 321 slide through the wall of the return sink hole 331. A return spring 332 is installed between the two latching members.

[0041] See Figure 3 , Figure 4 and Figure 5 The latching component consists of a movable plate 333, a latching block 334, and a pressing block 335. The movable plate 333 is located inside the retraction countersunk hole 331 and is fixedly connected to the reset spring 332. The latching block 334 and the pressing block 335 are respectively installed from top to bottom at the end of the movable plate 333 away from the axis of the support rod 321. Both the latching block 334 and the pressing block 335 slide through the support rod 321. The upper end of the latching block 334 is provided with a slope.

[0042] In specific operation, while the leveling lower pressure plate 30 pushes the top hammer downward, the sliding sleeve 320 gradually moves towards the locking block 334 and pushes the locking block 334. Simultaneously, the annular inclined surface at the lower end of the sliding sleeve 320 pushes the slope at the upper end of the two locking blocks 334. The two locking blocks 334, under force, move into the return sinkhole 331, causing the two moving plates 333 to compress the return spring 332. The sliding sleeve 320 continues to move downward until the two locking holes 330 on the sliding sleeve 320 move to the positions of the two locking blocks 334. At this point, the sliding sleeve 320 releases its restriction on the two locking blocks 334, and the compressed return spring 332 returns to its original position. The two moving plates 333 then drive the two locking blocks 334 to return to their original positions. The two locking blocks 334 insert into the corresponding locking holes 330, thus achieving the function of limiting the sliding sleeve 320. At this point, the operation stops. The pressure of the leveling lower pressure plate 30 is stopped, and the two sliding sleeves 320 limit the leveling lower pressure plate 30. At this time, the leveling lower pressure plate 30 is in close contact with the surface to be tested by the top hammer, and the support member 20 provides elastic support to the top hammer. Then, the clamping handle controls the clamping device to lock the telescopic positioning pin, changing the elastic support of the support member 20 to the top hammer into a rigid support, ensuring the stability of the top hammer under force when performing hardness testing. It should be noted that there is a certain height difference between the working surface of the top hammer in the horizontal state and the cone surface of the top hammer in the horizontal state. The multiple telescopic positioning pins of the support member 20 can extend and retract, changing the depth of the top hammer in the multiple telescopic positioning, thereby compensating for the difference between the working surface of the top hammer in the horizontal state and the cone surface of the top hammer in the horizontal state, ensuring that the working surface and cone surface of the top hammer can be leveled and limited when the leveling lower pressure plate 30 descends the same distance.

[0043] See Figure 3 , Figure 4 and Figure 5 The supporting unit 2 includes a movable part 22 for controlling the lateral movement of the support member 20 and detachably mounted on the lifting platform 10. The movable part 22 includes a positioning frame 220 detachably mounted on the lifting platform 10. The positioning frame 220 has an upward-facing U-shaped structure. Two horizontally placed guide rods 221 are installed inside the positioning frame 220. A sliding block 222 is slidably passed through the two guide rods 221. The upper end of the sliding block 222 is fixedly connected to the support member 20. An adjusting screw 223 is threadedly connected to the middle of the sliding block 222. The two ends of the adjusting screw 223 are rotatably connected to the two side walls of the positioning frame 220.

[0044] In practice, before the top hammer hardness test, the positioning frame 220 is bolted onto the lifting platform 10. The positioning frame 220, through the guide rod 221 and the sliding block 222, positions the support member 20 below the pressure head system of the testing instrument 1. Then, the top hammer is placed and limited. After the top hammer is positioned, the lifting platform 10 is driven to rise. The lifting platform 10, through the positioning frame 220, guide rod 221, and sliding block 222, drives the support member 20 to rise. The support member 20 drives the support frame 213 and the top hammer to move upwards until they reach the testing position. The loading system of the testing instrument 1 controls the pressure head system to press the top hammer. The working surface or conical surface is pressed, and the measuring system measures the indentation and displays the hardness. Since hardness testing requires multiple sets of data for reference and average value, it is only necessary to release the pressure of the pressure head system on the top hammer, and then rotate the adjusting screw 223. The adjusting screw 223 drives the sliding block 222 to slide on the two guide rods 221 and drive the support 20 to move horizontally. The support 20 drives the support frame 213 and the top hammer to move horizontally, thereby changing the pressure point of the pressure head system and obtaining new data. This step is repeated until multiple data are measured and calculated to obtain the hardness of the working surface or conical surface of the top hammer.

[0045] Then, press the pressing blocks 335 on the two support rods 321 at the same time. The pressing blocks 335 drive the moving plate 333 and the locking block 334 to move into the retraction sink hole 331. The locking block 334 separates from the locking hole 330 and releases the limit on the sliding sleeve 320. The compressed support spring 322 drives the leveling lower pressure plate 30 to reset, and the top hammer is taken out from the support frame 213. The test is completed.

[0046] In the description of the embodiments of the present invention, it should be noted that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0048] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A special fixture for testing the hardness of a cemented carbide hammer, comprising a testing instrument, the testing instrument including a lifting platform for placing the hammer, characterized in that, Also includes: A support unit is provided on a lifting platform. The support unit includes a support member provided above the lifting platform, and a support part for placing a top hammer is installed on the support member. A leveling unit is installed on the support member. The leveling unit includes a leveling lower pressure plate installed above the support member. A level is installed on the upper end of the leveling lower pressure plate. Two telescopic parts are symmetrically installed on the lower end of the leveling lower pressure plate. The telescopic parts are detachably connected to the support member. The telescopic parts are provided with a buckle for locking the telescopic parts after length adjustment. When inspecting the working surface of the top hammer, the support part maintains a horizontal posture. The leveling lower pressure plate abuts against the working surface of the top hammer and applies downward pressure. After the support part is subjected to force, it transfers the load to the support component. The support component simultaneously provides rigid support to the support part. At the same time, the leveling lower pressure plate maintains a horizontal state through the telescopic part and completes the automatic leveling of the working surface of the top hammer. When inspecting the cone surface of the top hammer, the support part is pushed to an inclined state. The support part drives the cone surface of the top hammer toward the leveling lower pressure plate. The leveling lower pressure plate abuts against the cone surface of the top hammer and applies downward pressure. During the descent of the leveling lower pressure plate, the cone surface of the top hammer is gradually leveled. The support component simultaneously provides rigid support to the support part.

2. The special gauge for testing the hardness of a cemented carbide hammer according to claim 1, characterized in that: The support unit includes a movable part that controls the lateral movement of the support and is detachably mounted on the lifting platform.

3. The special gauge for testing the hardness of a cemented carbide hammer according to claim 1, characterized in that: The support includes two sliding rods symmetrically distributed front and back and slidably passing through the support member. A rotating frame is installed at the upper end of each sliding rod, and a rotating ring is installed between the two rotating frames. A support frame for placing the top hammer is rotatably connected to the inner surface of the rotating ring.

4. A special gauge for testing the hardness of a cemented carbide hammer according to claim 2, characterized in that: The movable part includes a positioning frame that can be detachably installed on the lifting platform. The positioning frame has an upward-facing U-shaped structure. Two horizontally placed guide rods are installed inside the positioning frame. A sliding block is slidably passed through the two guide rods. The upper end of the sliding block is fixedly connected to the support member. An adjusting screw is threadedly connected to the middle of the sliding block. The two ends of the adjusting screw are rotatably connected to the two side walls of the positioning frame.

5. A special gauge for testing the hardness of a cemented carbide hammer according to claim 1, characterized in that: The telescopic part includes a sliding sleeve installed at the lower end of the leveling lower pressure plate. A support rod is slidably connected inside the sliding sleeve. An installation plate is installed at the lower end of the support rod. The installation plate is detachably installed on the support member. A support spring is installed between the upper end of the support rod and the lower end of the leveling lower pressure plate.

6. A special gauge for testing the hardness of a cemented carbide hammer according to claim 5, characterized in that: The latching part includes two latching holes symmetrically opened on the sliding sleeve along the axis of the sliding sleeve. A return sinking hole is opened at the lower end of the support rod. Two latching parts symmetrically distributed along the axis of the support rod slide through the wall of the return sinking hole. A return spring is installed between the two latching parts.

7. A special gauge for testing the hardness of a cemented carbide hammer according to claim 6, characterized in that: The latching component consists of a movable plate, a latching block, and a pressing block. The movable plate is located in the retraction countersunk hole and is fixedly connected to the reset spring. The latching block and the pressing block are respectively installed from top to bottom on the end of the movable plate away from the axis of the support rod. Both the latching block and the pressing block slide through the support rod.

8. A special gauge for testing the hardness of a cemented carbide hammer according to claim 3, characterized in that: The rotating frame is equipped with a torsion spring at its rotation position.

9. A special gauge for testing the hardness of a cemented carbide hammer according to claim 3, characterized in that: The inner circumferential surface of the support frame is equipped with multiple circumferentially evenly distributed rubber protrusions.

Images