Automatic conversion device for full loth's hardness tester initial test force

Abstract

The application discloses a full Rockwell hardness tester initial test force automatic conversion device and belongs to the field of force conversion devices. The full Rockwell hardness tester initial test force automatic conversion device comprises an electric component and a weight component. The electric component comprises a motor, a lead screw, a lead screw nut and an annular concave V-shaped blade, and the annular concave V-shaped blade is connected with the lead screw nut at one end. The weight component comprises a loading frame, a cavity counterweight, a counterweight fine adjustment particle and a V-shaped blade support. The loading frame comprises a first end and a second end, the first end is provided with an annular convex V-shaped blade which is abutted with the annular concave V-shaped blade, and the second end is connected with the cavity counterweight through a nut. The V-shaped blade support is connected with the loading frame through a shaft pin, the shaft pin is slightly rotated around the shaft center, and the weight component is automatically adjusted to be perpendicular to the ground under the action of gravity. The weight component is abutted with a large lever force receiving shaft through the V-shaped blade support, the force receiving surface of the V-shaped blade support is completely attached to the large lever force receiving shaft, and the assembly error caused by the non-parallelism between the large lever force receiving shaft and the loading frame is eliminated. The full Rockwell hardness tester initial test force automatic conversion device has small impact force, high wear resistance and high automation degree.

Description

Technical Field

[0001] This invention belongs to the field of force conversion devices and relates to an automatic force conversion device for the initial test of a Rockwell hardness tester. Background Technology

[0002] Test force conversion devices are widely used in hardness testers, especially in full Rockwell hardness testers where initial test force conversion devices are frequently used.

[0003] The full Rockwell hardness tester is mainly used for Rockwell hardness testing of metallic materials and products. The initial test force conversion device can realize the conversion between the initial test force of the full Rockwell hardness tester and the surface Rockwell hardness tester, so that the same Rockwell hardness tester can perform hardness tests on different test scales of Rockwell hardness and surface Rockwell hardness.

[0004] In existing technologies, the conversion of the initial test force in full Rockwell hardness testers is mainly achieved using a handwheel knob device.

[0005] The handwheel knob device relies on manual operation, which has problems such as inconsistent handwheel rotation positioning, large impact force, and easy wear, thus affecting the stability and reliability of the initial test force weight. In addition, the low level of automation of the handwheel knob device cannot adapt to the trend of automation development in Rockwell hardness testing. Summary of the Invention

[0006] To address the problems of non-unique positioning, high impact force, easy wear, and inability to guarantee stability and reliability during the initial test force conversion process in existing technologies, the main objective of this invention is to provide an automatic initial test force conversion device for a Rockwell hardness tester. This device can guarantee stable and reliable positioning during the initial test force conversion process, reduce impact force and wear, and also has the advantages of high automation.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] This invention discloses an automatic initial test force conversion device for a Rockwell hardness tester, comprising an electric component and a weight component. The electric component includes a motor, a lead screw, a lead screw nut, and an annular concave V-shaped cutting edge, one end of which is connected to the lead screw nut. The weight component includes a loading frame, a hollow counterweight block, counterweight fine-tuning particles, and a V-shaped blade bearing. The loading frame has a first end and a second end. The first end has an annular convex V-shaped cutting edge that abuts against the annular concave V-shaped cutting edge, and the second end is connected to the hollow counterweight block via a nut. The hollow counterweight block has a cavity in which counterweight fine-tuning particles are added and removed. The V-shaped blade bearing is connected to the loading frame via a pin, and abuts against the large lever's force-bearing shaft.

[0009] Furthermore, the electric component includes a lead screw nut and a switch contact rod mounted on the lead screw nut. When the switch contact rod moves upward with the lead screw nut, it can abut against the upper limit switch; when the switch contact rod moves downward with the lead screw nut, it can abut against the lower limit switch.

[0010] Furthermore, the electric component includes a lead screw nut and an annular concave V-shaped cutting edge mounted on the lead screw nut, the annular concave V-shaped cutting edge abutting against the convex V-shaped cutting edge of the loading frame.

[0011] Furthermore, the V-shaped knife bearing is connected to the force loading frame via a pivot pin, and the pivot pin of the weight assembly rotates on a rotating shaft.

[0012] Furthermore, the hollow counterweight is connected to the second end of the force loading frame via a nut, facilitating disassembly.

[0013] As a preferred option, the V-shaped blade bearing is an independent structural component made of manganese steel material 60Si2Mn, with a hardness greater than 60HRC after heat treatment, which improves the wear resistance of the V-shaped blade bearing.

[0014] The working method of the automatic conversion device for initial test force of a Rockwell hardness tester disclosed in this invention is as follows: the electric component abuts against the convex V-shaped blade of the force loading frame of the weight component through the annular concave V-shaped blade. The electric component drives the weight component to move up and down. The test force is automatically converted according to the different upper and lower limit switches contacted by the switch rod in the electric component, thereby improving the automation and reliability of the test force conversion.

[0015] The V-shaped blade bearing in the weight assembly is connected to the force loading frame via a pivot pin. The pivot pin of the weight assembly allows for free rotation, enabling automatic adjustment of the verticality of the weight assembly. Simultaneously, since the weight assembly abuts against the force-bearing shaft of the large lever via the V-shaped blade bearing, the force-bearing surface of the V-shaped blade is in complete contact with the force-bearing shaft of the large lever, further eliminating assembly errors caused by the non-parallelism between the force-bearing shaft of the large lever and the loading frame, and improving the stability during the automatic conversion of the test force.

[0016] Beneficial effects:

[0017] 1. The present invention discloses an automatic initial test force conversion device for a Rockwell hardness tester. By using a V-shaped blade bearing connected to the loading frame via a pin, the V-shaped blade bearing can rotate slightly around the pin, achieving the effect of automatically adjusting the weight assembly to be perpendicular to the ground by gravity. At the same time, the weight assembly abuts against the force-bearing shaft of the large lever through the V-shaped blade bearing, so that the force-bearing surface of the V-shaped blade is completely in contact with the force-bearing shaft of the large lever. This can eliminate the assembly error caused by the non-parallelism between the force-bearing shaft of the large lever and the loading frame. Compared with the weight hanging type, it reduces the shaking of the weight assembly during the test force conversion process and improves the accuracy and stability of the initial test force.

[0018] 2. The present invention discloses an automatic conversion device for the initial test force of a Rockwell hardness tester. Since the electric component automatically drives the weight component to move up and down according to the hardness scale, the automatic conversion of the initial test force is achieved. Compared with the method of rotating the handwheel, this effectively ensures the correctness of the initial test force conversion.

[0019] 3. The present invention discloses an automatic conversion device for the initial test force of a Rockwell hardness tester, which uses a counterweight block with a cavity. Fine-tuning particles for adding and removing counterweights can be added to or removed from the cavity, making it more convenient to adjust the mass of the weight assembly and more likely to ensure the accuracy of the initial test force value.

[0020] 4. The present invention discloses an automatic conversion device for the initial test force of a Rockwell hardness tester. It uses a detection switch contact rod to determine whether the initial test force of the Rockwell hardness tester has been automatically converted. Compared with the handwheel rotation method, this effectively ensures the reliability of the initial test force conversion. Attached Figure Description

[0021] The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 The schematic diagram illustrates the structure of the automatic initial test force conversion device for the full Rockwell hardness tester in this invention.

[0023] Among them: 1—large lever, 2—force loading frame, 3—annular concave V-shaped blade, 4—motor, 5—lead screw nut, 6—lead screw, 7—V-shaped blade bearing, 8—switch contact rod, 9—large lever force-bearing shaft, 10—hollow counterweight block, 11—force loading frame convex V-shaped blade, 12—upper limit switch, 13—lower limit switch, 14—counterweight fine-tuning particles, 15—shaft pin, 20—second end, 30—first end, 40—electric component, 50—weight component. Detailed Implementation

[0024] To better illustrate the purpose and advantages of the present invention, the invention will be further described below in conjunction with the accompanying drawings and examples.

[0025] Example 1:

[0026] like Figure 1As shown, this embodiment discloses an automatic conversion device for the initial test force of a full Rockwell hardness tester, including an electric component 40 and a weight component 50. The electric component 40 includes a motor 4, a lead screw 6, a lead screw nut 5, and an annular concave V-shaped cutting edge 3. One end of the annular concave V-shaped cutting edge 3 is connected to the lead screw nut 5, and the other end abuts against the convex V-shaped cutting edge 11 of the loading frame of the weight component 50. The lead screw nut 5 drives the weight component 50 to move up and down through the annular concave V-shaped cutting edge 3. When the switch contact rod 8 fixed on the lead screw nut 5 touches the lower limit switch 13, the entire weight of the weight component 50 abuts against the large lever force shaft 9 through the V-shaped bearing 7, realizing the automatic conversion of the initial Rockwell hardness test force of the full Rockwell hardness tester; when the switch contact rod 8 fixed on the lead screw nut 5 touches the upper limit switch 13, the entire weight of the weight component 50 disengages from the large lever force shaft 9, realizing the automatic conversion of the initial Rockwell hardness test force of the full Rockwell hardness tester. The weight assembly 50 includes a force loading frame 2, a hollow counterweight block 10, counterweight fine-tuning particles 14, and a V-shaped blade bearing 7. The force loading frame includes a first end 20 and a second end 30. The first end 20 has an annular convex V-shaped blade 11, and the second end is connected to the hollow counterweight block 10 via a nut. The hollow counterweight block 10 has a cavity in which counterweight fine-tuning particles 14 can be added or removed. The V-shaped blade bearing 7 is connected to the force loading frame 2 via a pivot pin 15. The weight assembly 50 can rotate freely on the pivot pin 15, and the V-shaped blade bearing 7 can abut against the large lever force-bearing shaft 9. Since the weight assembly 50 can rotate freely with the pivot pin 15, the verticality of the weight assembly 50 is automatically adjusted, reducing the impact of the non-unique position of the weight assembly 50. In addition, since the weight assembly 50 abuts against the large lever force shaft 9 through the V-shaped blade bearing 7, the force-bearing surface of the V-shaped blade bearing 7 is completely in contact with the large lever force shaft 9, further eliminating the assembly error caused by the non-parallelism between the large lever force shaft 9 and the force loading frame 2, while reducing the impact of the weight assembly 50 on the large lever force shaft 9.

[0027] like Figure 1 As shown, the electric component 40 drives the weight component 50 to move up and down through the contact between the annular concave V-shaped blade 3 and the convex V-shaped blade 11 of the force loading frame, ensuring that the position of the weight component 50 is unique in the horizontal direction. The annular concave V-shaped blade 3 is made of manganese steel (60Si2Mn), and its hardness is greater than 60HRC after heat treatment, which improves the wear resistance of the concave V-shaped blade.

[0028] The V-shaped knife bearing 7 is an independent structural component made of manganese steel (60Si2Mn). After heat treatment, its hardness is greater than 60HRC, which improves the wear resistance of key mating structural components and enhances the stability, reliability, and precision of the equipment.

[0029] like Figure 1As shown, the hollow counterweight 10 is connected to the second end of the force loading frame by a nut and can be freely disassembled. It is convenient to add, remove and replace the counterweight fine-tuning particles 14 inside the cavity of the hollow counterweight 10, making the weight adjustment process of the weight assembly 50 easier and the adjustment result more accurate.

[0030] When the initial test force of the Rockwell hardness tester is converted, the electric component 40 drives the weight component 50 to move up and down. The initial test force of the Rockwell hardness tester is automatically converted by detecting whether the switch contact rod 8 touches the upper limit switch 12 or the lower limit switch 13, thus ensuring the uniqueness of the up and down movement position of the weight component 50.

[0031] The above detailed description further illustrates the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic conversion device for the initial test force of a Rockwell hardness tester, characterized in that, The device includes an electric component (40) and a weight component (50). The electric component (40) includes a motor (4), a lead screw (6), a lead screw nut (5), and an annular concave V-shaped blade (3). One end of the annular concave V-shaped blade (3) is fixed to the lead screw nut (5). The weight component (50) includes a force loading frame (2), a hollow counterweight block (10), counterweight fine-tuning particles (14), and a V-shaped blade bearing (7). The force loading frame (2) includes a first end (30) and a second end (20). The first end (30) of the force loading frame (2) has a loading frame convex V-shaped blade (11). The second end (20) of the force loading frame (2) is connected to the hollow counterweight block (10), which has a cavity for adding or removing counterweight fine-tuning particles (14). The electric assembly (40) also includes a switch rod (8), an upper limit switch (12), and a lower limit switch (13); the switch rod (8) is mounted on the lead screw nut (5), and the lead screw nut (5) drives the switch rod (8) to move upward so that the switch rod (8) contacts the upper limit switch (12); the lead screw nut (5) drives the switch rod (8) to move downward so that the switch rod (8) contacts the lower limit switch (13); The electric assembly (40) includes a lead screw nut (5) and an annular concave V-shaped blade (3) mounted on the lead screw nut (5), the annular concave V-shaped blade (3) abutting against the convex V-shaped blade (11) of the loading frame; The first end (30) of the force loading frame (2) is provided with a loading frame convex V-shaped blade for cooperating with the annular concave V-shaped blade (3); The V-shaped knife bearing (7) is connected to the force loading frame (2) via a shaft pin (15); the shaft pin (15) in the weight assembly (50) is a rotating shaft that can rotate freely.

2. The automatic conversion device for initial test force of the Rockwell hardness tester according to claim 1, characterized in that, The weight assembly (50) abuts against the large lever force shaft (9) through the V-shaped knife bearing (7).

3. The automatic conversion device for initial test force of a Rockwell hardness tester according to claim 1, characterized in that, The V-shaped knife bearing (7) is an independent structural component made of manganese steel material 60Si2Mn, and its hardness is greater than 60HRC after heat treatment.

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