Rockwell hardness tester for metal detection

Abstract

The utility model relates to the technical field of Rockwell hardness testers, and discloses a Rockwell hardness tester for metal detection, which comprises a detection machine body, a lifting table arranged on the detection machine body, an inductive head arranged on the detection machine body right above the lifting table, a tooling mechanism arranged on the lifting table, and a three-jaw chuck arranged on the worktable, the working table is installed on the top of the lifting table, the three-jaw chuck is installed on the working table, an upper limiting jaw is arranged on a clamping jaw of the three-jaw chuck, the upper limiting jaw is detachably connected with the clamping jaw, and the upper limiting jaw has the freedom degree of moving in the radial direction of the three-jaw chuck. The workpiece is clamped through the three-jaw chuck, the stability of workpiece measurement is guaranteed, the spherical workpiece is limited through the upper limiting jaw for a spherical part, the upper limiting jaw abuts against the spherical workpiece, the upper limiting jaw is located above the circle center of the spherical workpiece, and therefore tool limiting is conducted on the spherical workpiece together with the three-jaw chuck; the tool strength of the spherical workpiece is improved, and the condition of deviation during measurement is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of Rockwell hardness tester technology, specifically a Rockwell hardness tester for metal detection. Background Technology

[0002] The Rockwell hardness tester is a benchtop Rockwell hardness tester that uses the Rockwell measurement principle. It is used for hardness testing of materials such as carbon steel, alloy steel, cast iron, non-ferrous metals, and engineering plastics. It features high testing accuracy, a wide measurement range, automatic loading and unloading of the main test force, and digital display and automatic printing of measurement results, or communication with an external computer. Currently, Rockwell hardness testers generally only provide a measuring platform, where the object to be tested is placed directly without any fixation. This can easily lead to positional deviations during the testing process, especially when measuring spherical workpieces. For example, when measuring steel balls, if a load is applied, the measuring probe may not be perpendicular to the workpiece's measurement center, causing the steel ball to deviate from the measuring probe. This can result in distorted hardness measurement data, and in severe cases, probe breakage or deformation and bending of the internal lever mechanism, damaging the instrument. It can also cause the workpiece to detach from the measuring platform, injuring the operator. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a Rockwell hardness tester for metal detection that can fix the workpiece to ensure that there is no deviation during measurement.

[0004] The purpose of this utility model is achieved through the following technical solution: a Rockwell hardness tester for metal detection, comprising a testing body, a lifting platform on the testing body, a sensing head directly above the lifting platform, a tooling mechanism on the lifting platform, the tooling mechanism comprising a worktable and a three-jaw chuck, the worktable being mounted on the top of the lifting platform, the three-jaw chuck being mounted on the worktable, an upper limit chuck being provided on the jaws of the three-jaw chuck, the upper limit chuck being detachably connected to the jaws, and the upper limit chuck having a degree of freedom to move radially along the three-jaw chuck.

[0005] Furthermore, the upper limit chuck is shaped like a figure 7, and a mounting plate is fixed to the bottom of the upper limit chuck. The mounting plate is connected to the upper limit chuck in a Z-shape. A strip groove is formed through the mounting plate along the axial direction of the three-jaw chuck. A threaded hole is formed on the chuck. The tail of the bolt passes through the strip groove and is threaded into the threaded hole. The head of the bolt presses the mounting plate against the chuck.

[0006] Furthermore, a tooling hole is coaxially provided on the top of the lifting platform, and a tooling shaft is coaxially fixed on the bottom of the worktable, the tooling shaft being adapted to fit into the tooling hole.

[0007] Furthermore, the sidewall of the tooling shaft is provided with a plurality of abutment blocks, which are evenly distributed along the circumferential direction of the tooling shaft, and the abutment blocks have the freedom to move in the radial direction of the tooling shaft.

[0008] Furthermore, the tooling shaft has a mounting hole corresponding to the position of the abutment block. The mounting hole is radially through the tooling shaft. The abutment block is slidably fitted into the mounting hole. The tooling shaft is hollow and has a pressing rod inside it. The pressing rod has the freedom to move axially along the tooling shaft. The top of the abutment block has a wedge-shaped surface located on the movement path of the pressing rod.

[0009] Furthermore, a locking screw is threaded onto the worktable, and the locking screw passes through the tooling shaft and connects to the pressure rod.

[0010] Furthermore, the top of the workbench is provided with a countersunk hole and a threaded hole in sequence along the direction close to the tooling shaft, the locking screw thread is adapted to the threaded hole, and the head of the locking screw is located in the countersunk hole.

[0011] Furthermore, a telescopic rod is connected parallel to the bottom of the abutment block. The telescopic rod is located inside the tooling shaft. The end of the telescopic rod away from the abutment block is fixedly connected to the tooling shaft. A spring is sleeved on the telescopic rod. When the spring is in its normal state, the abutment block is completely located inside the tooling shaft.

[0012] The beneficial effects of the utility model are:

[0013] The workpiece is held by a three-jaw chuck to ensure the stability of the workpiece measurement. For spherical parts, the upper limit jaw is used to limit the spherical workpiece. The upper limit jaw abuts against the spherical workpiece and is located above the center of the spherical workpiece. This, together with the three-jaw chuck, limits the tooling of the spherical workpiece, improves the tooling strength of the spherical workpiece, effectively avoids the deviation during measurement, and ensures high measurement accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a Rockwell hardness tester for metal detection according to the present invention.

[0015] Figure 2 This is a schematic diagram of the mounting plate in a Rockwell hardness tester for metal detection according to this utility model.

[0016] Figure 3 This is a schematic diagram of the assembly of the tooling shaft and the lifting platform in a Rockwell hardness tester for metal detection according to this utility model.

[0017] Figure 4 for Figure 3Enlarged view of point A in the middle;

[0018] In the diagram, 1-Detection body, 2-Lifting platform, 3-Induction head, 4-Worktable, 5-Three-jaw chuck, 6-Claw, 7-Upper limit claw, 8-Mounting plate, 9-Strip groove, 11-Bolt, 12-Tooling hole, 13-Tooling shaft, 14-Abutting block, 15-Mounting hole, 16-Pressing rod, 17-Wedge surface, 18-Locking screw, 19-Counterhole, 20-Threaded hole, 21-Telescopic rod, 22-Spring. Detailed Implementation

[0019] like Figures 1 to 4 As shown, a Rockwell hardness tester for metal detection includes a testing body 1, a lifting platform 2 on the testing body 1, and a sensing head 3 directly above the lifting platform 2. A tooling mechanism is mounted on the lifting platform 2, including a worktable 4 and a three-jaw chuck 5. The worktable 4 is mounted on top of the lifting platform 2, and the three-jaw chuck 5 is mounted on the worktable 4. An upper limit chuck 7 is provided on the jaws 6 of the three-jaw chuck 5. The upper limit chuck 7 is detachably connected to the jaws 6 and has a degree of freedom to move radially along the three-jaw chuck 5. A workpiece is placed on the worktable 4 through the center hole of the three-jaw chuck 5, and the workpiece is clamped by the three-jaw chuck 5 to ensure the stability of the workpiece measurement. This mechanism is suitable for spherical parts. Due to differences in size, when a larger spherical part is placed on the worktable 4, its center is located above the chuck 6, causing the chuck 6 to be positioned below the center of the part and unable to clamp it securely. In this case, an upper limit chuck 7 is used as an auxiliary tooling. The upper limit chuck 7 is detachably connected to the chuck 6, allowing the size of the upper limit chuck 7 to be changed according to the size of the spherical part. After the upper limit chuck 7 comes into contact with the spherical workpiece, it is positioned above the center of the workpiece. This, together with the three-jaw chuck 5, provides tooling limit for the spherical workpiece, improving the tooling strength and effectively preventing deviations during measurement, thus ensuring high measurement accuracy.

[0020] Furthermore, such as Figure 1 and Figure 2 As shown, the upper limit chuck 7 is shaped like the number 7. The bottom of the upper limit chuck 7 is fixed with a mounting plate 8. The mounting plate 8 and the upper limit chuck 7 are connected in a Z-shape. A strip groove 9 is opened through the mounting plate 8 along the axial direction of the three-jaw chuck 5. A threaded hole is opened on the jaw 6. The tail of the bolt 11 passes through the strip groove 9 and is threaded into the threaded hole. The head of the bolt 11 presses the mounting plate 8 against the jaw 6. Loosening the bolt 11 allows the upper limit chuck 7 to move closer to or away from the center of the three-jaw chuck 5. After the upper limit chuck 7 contacts the part, tightening the bolt 11 completes the limiting of the part and ensures the stability of the measurement. The upper limit chuck 7 is detachably connected to the jaw 6 by the bolt 11, which makes it convenient to replace the upper limit chuck 7 of the corresponding size according to the size of the spherical part.

[0021] Furthermore, such as Figure 1 , Figure 3 and Figure 4 As shown, a tooling hole 12 is coaxially provided on the top of the lifting platform 2, and a tooling shaft 13 is coaxially fixed on the bottom of the worktable 4. The tooling shaft 13 is adapted to fit into the tooling hole 12. Multiple abutment blocks 14 are provided on the side wall of the tooling shaft 13. The multiple abutment blocks 14 are evenly distributed along the circumference of the tooling shaft 13. The abutment blocks 14 have the freedom to move along the radial direction of the tooling shaft 13. The tooling shaft 13 has mounting holes 15 corresponding to the positions of the abutment blocks 14. The mounting holes 15 are located along the tooling shaft 13. The tooling shaft 13 is radially through-hole, and the abutment block 14 is slidably fitted into the mounting hole 15. The tooling shaft 13 is hollow, and a pressing rod 16 is provided inside the tooling shaft 13. The pressing rod 16 has the freedom to move along the axial direction of the tooling shaft 13. A wedge-shaped surface 17 is provided on the top of the abutment block 14, and the wedge-shaped surface 17 is located on the movement path of the pressing rod 16. A telescopic rod 21 is connected parallel to the bottom of the abutment block 14, and the telescopic rod 21 is located inside the tooling shaft 13. The end away from the abutment block 14 is fixedly connected to the tooling shaft 13. A spring 22 is sleeved on the telescopic rod 21. When the spring 22 is in the normal state, the abutment block 14 is completely located inside the tooling shaft 13. The worktable 4 is also installed on the lifting platform 2 in a detachable manner without damaging the structure of the lifting platform 2. The improved worktable 4 can be directly installed on the lifting platform 2. The specific installation process is as follows: insert the tooling shaft 13 into the tooling hole 12, and then move the pressing rod 16 close to the abutment block 14 so that the pressing rod 16 presses the wedge-shaped surface 17 of the abutment block 14. Multiple abutment blocks 14 are evenly distributed around the circumference of the pressing rod 16 so that the pressing rod 16 can simultaneously press the wedge-shaped surface 17 on all abutment blocks 14. Under the guidance of the wedge-shaped surface 17, the spring 22 of the abutment block 14 extends out from the mounting hole 15, so that the abutment block 14 is pressed against the side wall of the tooling hole 12, thereby completing the quick installation of the worktable 4. The operation is simple and quick.

[0022] Furthermore, such as Figure 3 and Figure 4As shown, a locking screw 18 is threaded onto the worktable 4. The locking screw 18 passes through the tooling shaft 13 and connects to the pressure rod 16. The top of the worktable 4 has a countersunk hole 19 and a threaded hole 20 sequentially opened along the direction close to the tooling shaft 13. The thread of the locking screw 18 is adapted to the threaded hole 20, and the head of the locking screw 18 is located in the countersunk hole 19. Tightening the locking screw 18 causes the locking screw 18 to drive the pressure rod 16 to make a screwing motion, so that the pressure rod 16 presses the abutment block 14 out of the mounting hole 15 and abuts against the side of the tooling hole 12. On the wall, the position of the lower pressure rod 16 is locked by the threaded engagement of the locking screw 18 and the threaded hole 20, so that the abutment block 14 can always be in contact with the lifting platform 2. When it is necessary to remove the worktable 4, the locking screw 18 is rotated through the center hole of the three-jaw chuck 5, so that the locking screw 18 drives the lower pressure rod 16 away from the abutment block 14. The abutment block 14 is reset under the reaction force of the spring 22, so that the abutment block 14 is completely located in the tooling shaft 13. At this time, the worktable 4 can be removed directly. The installation and disassembly are simple and quick.

Claims

1. A Rockwell hardness tester for metal detection, comprising a testing body (1), a lifting platform (2) provided on the testing body (1), and a sensing head (3) provided directly above the lifting platform (2) on the testing body (1), characterized in that, The lifting platform (2) is provided with a tooling mechanism, which includes a worktable (4) and a three-jaw chuck (5). The worktable (4) is installed on the top of the lifting platform (2), and the three-jaw chuck (5) is installed on the worktable (4). An upper limit pawl (7) is provided on the jaw (6) of the three-jaw chuck (5). The upper limit pawl (7) is detachably connected to the jaw (6), and the upper limit pawl (7) has a degree of freedom to move radially along the three-jaw chuck (5).

2. The Rockwell hardness tester for metal detection according to claim 1, characterized in that, The upper limit chuck (7) is shaped like the number 7. The bottom of the upper limit chuck (7) is fixed with a mounting plate (8). The mounting plate (8) and the upper limit chuck (7) are connected in a Z-shape. A strip groove (9) is provided on the mounting plate (8) along the axial direction of the three-jaw chuck (5). A threaded hole is provided on the chuck (6). The tail of the bolt (11) passes through the strip groove (9) and is threaded into the threaded hole. The head of the bolt (11) presses the mounting plate (8) against the chuck (6).

3. The Rockwell hardness tester for metal detection according to claim 1, characterized in that, The top of the lifting platform (2) is coaxially provided with a tooling hole (12), and the bottom of the worktable (4) is coaxially fixed with a tooling shaft (13), which is adapted to fit into the tooling hole (12).

4. The Rockwell hardness tester for metal detection according to claim 3, characterized in that, The tooling shaft (13) has a plurality of abutment blocks (14) on its side wall. The plurality of abutment blocks (14) are evenly distributed along the circumferential direction of the tooling shaft (13). The abutment blocks (14) have the freedom to move in the radial direction of the tooling shaft (13).

5. A Rockwell hardness tester for metal detection according to claim 4, characterized in that, The tooling shaft (13) has a mounting hole (15) corresponding to the position of the abutment block (14). The mounting hole (15) is radially through the tooling shaft (13). The abutment block (14) is slidably fitted into the mounting hole (15). The tooling shaft (13) is hollow. A pressing rod (16) is provided inside the tooling shaft (13). The pressing rod (16) has the freedom to move along the axial direction of the tooling shaft (13). A wedge-shaped surface (17) is provided on the top of the abutment block (14). The wedge-shaped surface (17) is located on the moving path of the pressing rod (16).

6. A Rockwell hardness tester for metal detection according to claim 5, characterized in that, The worktable (4) is threaded with a locking screw (18), which is inserted into the tooling shaft (13) and connected to the pressure rod (16).

7. A Rockwell hardness tester for metal detection according to claim 6, characterized in that, The top of the workbench (4) is provided with a countersunk hole (19) and a threaded hole (20) in sequence along the direction close to the tooling shaft (13). The locking screw (18) is threaded to fit the threaded hole (20), and the head of the locking screw (18) is located in the countersunk hole (19).

8. A Rockwell hardness tester for metal detection according to claim 6, characterized in that, The bottom of the abutment block (14) is connected in parallel with a telescopic rod (21). The telescopic rod (21) is located inside the tooling shaft (13). The end of the telescopic rod (21) away from the abutment block (14) is fixedly connected to the tooling shaft (13). A spring (22) is sleeved on the telescopic rod (21). When the spring (22) is in its normal state, the abutment block (14) is completely located inside the tooling shaft (13).

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