An integrated calibration device for Rockwell hardness tester and its working method

Abstract

The present invention discloses an integrated calibration device and working method of a Rockwell hardness tester, which belongs to the field of hardness tester detection technology, including a Rockwell hardness tester body, a top connection block, a force sensor, a connector, a hardness tester indenter, a displacement sensor, a data output device and a data transmission line; wherein the force sensor captures and obtains the force value loaded on the hardness tester; the displacement sensor can synchronously obtain the distance the hardness tester indenter falls during the pressing process of the hardness tester indenter; the data output device can select the scale corresponding to the hardness tester, record and store data, and generate raw detection data, which can be connected to a certificate system to generate a calibration certificate. The integrated calibration device of the Rockwell hardness tester of the present invention adopts an integrated design to reduce the error caused by human operation, the linear accuracy of the displacement is better than 0.2μm, and the accuracy of the force sensor is 0.3 or above; and it has high stability and long service life, and can replace traditional calibration equipment and methods.

Description

Technical Field

[0001] The present invention belongs to the technical field of hardness tester detection, and in particular relates to an integrated calibration device for a Rockwell hardness tester. The present invention also relates to a working method of the integrated calibration device for a Rockwell hardness tester. Background Art

[0002] The Rockwell hardness test is to use a standard indenter to apply test forces (initial test force F0 and total test force F0 + F1) to the surface of the test material twice, and the indenter is pressed into the surface of the sample under the action of the test force. After the total test force is maintained for a certain period of time, the main test force F1 is removed, and the indentation depth is measured while retaining the initial test force F0. The difference between the indentation depth under the total test force and the indentation depth under the initial test force (the so-called residual indentation depth) is used to characterize the hardness. The larger the residual indentation depth value, the lower the hardness value, and vice versa.

[0003] The Rockwell hardness tester's indenter force value, indentation depth and hardness indication are the three main items that must be done for the first calibration in the hardness tester's calibration procedure. The traditional method requires multiple sets of equipment: a set of force measuring standard machines is used to calibrate the initial force and return force values. A special optical instrument is used to measure the indentation size and calculate the indentation depth, and then the hardness indication is calculated from the relationship between the depth and hardness under the corresponding load. A special depth measuring device calibrator detects the hardness tester indentation depth measurement device.

[0004] The traditional measurement method has the following disadvantages: First, there are too many standards, involving multiple sets of force standard machines, special optical instruments, and depth measuring device calibrators; second, it is not easy to carry. Microscopes and vertical optical gauges are not convenient to bring to the customer site, and the Rockwell hardness tester cannot be sent for inspection due to its weight and installation conditions; third, the operations of different operators will cause certain data errors; fourth, there are too many sources of data acquisition, the measurement process is complicated, the data calculation introduces uncertain components, and data processing is not convenient.

[0005] Based on the above four reasons, the traditional measurement method has low detection efficiency and high requirements on the detection personnel, so this set of Rockwell hardness tester detection device was invented. Summary of the invention

[0006] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide an integrated calibration device for a Rockwell hardness tester, which solves the problem that the calibration process of the Rockwell hardness tester in the prior art is not only time-consuming and troublesome, but also consumes a large number of standard hardness blocks, and the value obtained is not the specific value of the error, but the limit value of whether it is qualified or not.

[0007] Technical solution: An integrated calibration device for a Rockwell hardness tester, comprising a Rockwell hardness tester body, a top connection block, a force sensor, a connection piece, a hardness tester indenter, a displacement sensor, a data output device and a data transmission line, wherein the top connection block is connected to the Rockwell hardness tester body, the force sensor is connected to the top connection block, the connection piece is connected to the force sensor, the hardness tester indenter and the displacement sensor are both fixedly arranged on the connection piece, and the Rockwell hardness tester body can drive the connection piece to rise and fall in a vertical direction, and the data output device is connected to the Rockwell hardness tester body through a data transmission line; wherein the force sensor captures and obtains the force value loaded on the hardness tester; the displacement sensor can synchronously obtain the distance the hardness tester indenter falls during the process of the hardness tester indenter being pressed down; the data output device can select the scale corresponding to the hardness tester, record and store data, and generate original detection data, and can be connected to a certificate system to generate a calibration certificate. The integrated calibration device of the Rockwell hardness tester of the present invention adopts an integrated design to reduce errors caused by human operation, the linear accuracy of displacement is better than 0.2μm, and the accuracy of the force sensor is 0.3 level and above; it has high stability and long service life, and can replace traditional calibration equipment and methods.

[0008] Furthermore, in the above-mentioned integrated calibration device for the Rockwell hardness tester, the accuracy of the force sensor is 0.3 level or above; the accuracy of the displacement sensor is above 0.2 μm.

[0009] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the Rockwell hardness tester body is provided with a test bench, a test bench lifting assembly and a test piece clamping assembly, the test bench lifting assembly is fixedly arranged on the Rockwell hardness tester body, the test bench and the test bench lifting assembly are fixedly connected, and the test bench is located directly below the hardness tester pressure head, the test piece clamping assembly is arranged on the test bench, a standard Rockwell hardness block can be placed on the test bench, and the test piece clamping assembly can clamp and fix the standard Rockwell hardness block. On the basis of the traditional Rockwell hardness tester, the lifting structure is set to automatic, and a test clamping assembly is provided, which can maintain the stability of the standard Rockwell hardness block during the detection process.

[0010] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the test bench lifting assembly includes a lifting drive motor, a motor support seat, a lifting drive screw, a lifting drive screw sleeve, a support sleeve and a horizontal support plate, the motor support seat is fixedly arranged on the Rockwell hardness tester body, the lifting drive motor and the support sleeve are both fixedly arranged on the motor support seat, and the lifting drive motor is connected to the lifting drive screw, the lifting drive screw sleeve is sleeved on the lifting drive screw, and the lifting drive screw sleeve is threadedly connected to the lifting drive screw, the motor support seat and the lower end of the lifting drive screw sleeve are fixedly connected, the lifting drive screw sleeve is slidably connected to the support sleeve, and the upper end of the lifting drive screw sleeve extends out of the support sleeve, the lifting drive screw sleeve extends out of the upper end of the support sleeve and is fixedly connected to the horizontal support plate, and the test bench is fixedly arranged on the upper end surface of the horizontal support plate. Through the structure of the screw and the screw sleeve, the lifting height of the test bench can be accurately controlled under the action of the control system.

[0011] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, a lifting guide slide is fixedly connected to the outer wall of the lifting drive screw sleeve by screws, a group of vertical guide columns are arranged between the upper and lower end surfaces inside the support sleeve, a group of guide sleeves are arranged on the lifting guide slide, the group of guide sleeves and a group of vertical guide columns are arranged one by one, and the vertical guide columns and the guide sleeves are slidably connected. The provided guide structure maintains the stability of vertical movement.

[0012] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the specimen clamping assembly includes a clamping drive motor, a rotating seat, a group of clamping arms and a clamping arm clamping drive block, the test bench is fixed on the upper end surface of the horizontal support plate by screws, the clamping drive motor is arranged on the test bench, and the rotating shaft of the clamping drive motor is connected to the rotating seat, the middle position of the group of clamping arms is hinged to the test bench, the clamping arm clamping drive block is arranged inside the test bench, and the clamping arm clamping drive block is connected to the rotating seat, and one end of the group of clamping arms is connected to the clamping arm clamping drive block.

[0013] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the upper end of the rotating seat is provided with a stud, the upper end of the stud is provided with a limit screw, the clamping arm clamping drive block and the stud are threadedly connected, the interior of the test bench is provided with a cavity 1, the inner wall of the cavity 1 is provided with a limit ring, the outer wall of the lower end of the rotating seat is provided with a limit boss, the rotating seat and the clamping arm clamping drive block are arranged in the cavity 1, the upper end face of the limit boss is in contact with the lower end face of the limit ring, the rotating seat is sleeved with a spring, and the spring is located between the upper end face of the limit ring and the lower end face of the clamping arm clamping drive block. The rotation of the stud is driven by a motor, so that the clamping arm clamping drive block can move up and down, and the clamping arm clamping drive block moves up and down, which can apply pressure to the upper and lower surfaces of the clamping arm respectively, so that the clamping arm rotates to clamp the workpiece to be tested.

[0014] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the cross-section of the clamping arm clamping drive block is circular, and an annular groove is provided on the outer circumference of the clamping arm clamping drive block, the clamping arm is a right-angle plate, and the clamping arm is connected to the test bench through a rotating shaft, one end of the clamping arm extends into cavity one, and the end of the clamping arm extending into cavity one is arranged in the annular groove, the end of the clamping arm is rollingly connected to cavity one, and the group of clamping arms are arranged in a circular array with the center of the clamping arm clamping drive block as the center of the circle.

[0015] Furthermore, in the above-mentioned integrated calibration device of the Rockwell hardness tester, the upper end surface of the test bench is provided with a groove 1 with a circular cross-section, the standard Rockwell hardness block is arranged in the groove 1, the test bench is provided with a group of grooves 2, the group of grooves 2 is arranged in a circular array with the center of the clamping arm clamping the driving block as the center of the circle, the group of grooves 2 and the group of clamping arms are arranged in a one-to-one correspondence, and the clamping arm is arranged in the groove 2, the groove 2 is connected with the cavity 1 and the groove 1, the inner wall of the upper end part of the group of clamping arms is located in the groove 1, the end of the clamping arm close to the clamping arm clamping the driving block is set to a spherical shape, and the clamping arm is provided with a groove 3 at a position close to the outer circumference of the clamping arm clamping the driving block, and the groove 3 is located on the part of the clamping arm extending out of the groove 1.

[0016] The present invention provides a working method of an integrated calibration device for a Rockwell hardness tester, comprising the following steps:

[0017] S1. Place the standard Rockwell hardness block in groove 1 of the test bench;

[0018] S2, the clamping drive motor starts, driving the rotating seat and the stud to rotate. Since the clamping drive block of the clamping arm is threadedly connected to the stud, the clamping drive block of the clamping arm descends in the vertical direction of the stud;

[0019] S3, the clamping drive block of the clamping arm moves downward, so that the clamping drive block of the clamping arm applies pressure to the spherical part of the clamping arm, so that a group of clamping arms rotate around the rotating shaft between the clamping arm and the test bench, and the upper end of the clamping arm shrinks toward the center of the test bench;

[0020] S4, a group of clamping arms move synchronously, and during the gradual contraction of a group of clamping arms, a group of clamping arms contacts the standard Rockwell hardness block in the groove 1 until a group of clamping arms is pressed tightly against the outer surface of the standard Rockwell hardness block;

[0021] S5, the lifting drive motor starts, driving the lifting drive screw to rotate. Since the lifting drive screw and the lifting drive screw sleeve are threadedly connected, the lifting drive screw sleeve rises in the vertical direction and reaches the set position, and the lifting drive motor stops;

[0022] S6. The main body of the Rockwell hardness tester drives the top connecting block to descend, and the force sensor, hardness tester indenter and displacement sensor descend synchronously until the hardness tester indenter contacts the upper surface of the standard Rockwell hardness block for hardness detection. At the same time, the force sensor and displacement sensor collect and analyze data through the data output device, thereby obtaining the detection data of the Rockwell hardness tester load and indentation depth.

[0023] S7. Through the depth data obtained from the standard Rockwell hardness block, the system processes the data and corrects the deformation of the force sensor, displacement sensor and connectors, the standard hardness value and the measured hardness value can be directly displayed.

[0024] It can be seen from the above technical scheme that the present invention has the following beneficial effects: the integrated calibration device of the Rockwell hardness tester described in the present invention integrates the displacement sensor and the hardness tester pressure head into one, and the displacement sensor changes to judge the measurement method of the Rockwell hardness tester state. Through intelligent judgment of the displacement sensor, and through the data output device, the result of the piece detection data can be displayed to the user very intuitively, which simplifies the use steps. Even if the measurement step is completed, the display screen can still retain the last measurement result, which is convenient for the user to record. When measuring the next test piece, the working method of the integrated calibration device of the Rockwell hardness tester described in the present invention has a simple and easy working principle, requires fewer detection personnel, and only one staff member is needed to complete the detection, and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of Embodiment 1 of the integrated calibration device of the Rockwell hardness tester of the present invention;

[0026] Figure 2 It is a schematic diagram of the first embodiment of the integrated calibration device for the Rockwell hardness tester of the present invention;

[0027] Figure 3FIG. 2 is a second embodiment of the integrated calibration device for the Rockwell hardness tester of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the test bench lifting assembly of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the specimen clamping assembly of the present invention;

[0030] Figure 6 It is a top view of the specimen clamping assembly described in the present invention.

[0031] In the figure: Rockwell hardness tester body 1, top connecting block 2, force sensor 3, connecting piece 4, hardness tester pressure head 5, displacement sensor 6, data output device 7, data transmission line 8, test bench 9, cavity one 91, limit ring 92, groove one 93, groove two 94, test bench lifting assembly 10, lifting drive motor 101, motor support seat 102, lifting drive screw 103, lifting drive screw sleeve 104, support sleeve 105, horizontal support plate 106, lifting guide slide plate 107, vertical guide column 108, guide sleeve 109, specimen clamping assembly 20, clamping drive motor 201, rotating seat 202, clamping arm 203, clamping arm clamping drive block 204, stud 205, limit screw 206, limit boss 207, spring 208, annular groove 209, groove three 210. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] Embodiment 1

[0038] like Figure 1 , 2The integrated calibration device of the Rockwell hardness tester shown includes a Rockwell hardness tester body 1, a top connection block 2, a force sensor 3, a connector 4, a hardness tester indenter 5, a displacement sensor 6, a data output device 7 and a data transmission line 8, wherein the top connection block 2 is connected to the Rockwell hardness tester body 1, the force sensor 3 is connected to the top connection block 2, the connector 4 is connected to the force sensor 3, the hardness tester indenter 5 and the displacement sensor 6 are both fixedly arranged on the connector 4, and the Rockwell hardness tester body 1 can drive the connector 4 to rise and fall in the vertical direction, and the data output device 7 is connected to the Rockwell hardness tester body 1 through the data transmission line 8; wherein the force sensor 3 captures and obtains the force value loaded on the hardness tester; the displacement sensor 6 can synchronously obtain the falling distance of the hardness tester indenter 5 during the pressing process of the hardness tester indenter 5; the data output device 7 can select the scale corresponding to the hardness tester, record and store data, and generate original detection data, which can be connected to the certificate system to generate a calibration certificate. The accuracy of the force sensor 3 is 0.3 or above; the accuracy of the displacement sensor 6 is above 0.2 μm.

[0039] The top connection block 2 is connected to the hardness tester to be tested. Through the downward pressing action of the hardness tester indenter 5, the force sensor 3 grabs and obtains the force value loaded on the hardness tester; the hardness tester indenter 5 is hard-connected to the displacement sensor 6 through a connector. During the downward pressing process of the hardness tester indenter 5, the displacement sensor 6 can synchronously obtain the distance the indenter falls; the data output device 7 has built-in dedicated analysis software, which can select the scale corresponding to the hardness tester, record and store data, and generate original detection data, which can be connected to the certificate system to generate a calibration certificate. The displacement sensor 6 is hard-connected to the hardness tester indenter 5 through a connector; the data output device 7 is connected to the detection device to transmit signals and data and provide electrical energy. The top connection block 2 and the connector 4 are an integrated structure, and the force sensor 3 and the displacement sensor 6 are both embedded in the connection mechanism formed by the top connection block 2 and the connector 4.

[0040] Embodiment 2

[0041] like Figure 3 The Rockwell hardness tester body 1 shown is provided with a test bench 9, a test bench lifting assembly 10 and a specimen clamping assembly 20, the test bench lifting assembly 10 is fixedly arranged on the Rockwell hardness tester body 1, the test bench 9 and the test bench lifting assembly 10 are fixedly connected, and the test bench 9 is located directly below the hardness tester indenter 5, the specimen clamping assembly 20 is arranged on the test bench 9, a standard Rockwell hardness block can be placed on the test bench 9, and the specimen clamping assembly 20 can clamp and fix the standard Rockwell hardness block.

[0042] like Figure 4The test bench lifting assembly 10 shown includes a lifting drive motor 101, a motor support seat 102, a lifting drive screw 103, a lifting drive screw sleeve 104, a support sleeve 105 and a horizontal support plate 106. The motor support seat 102 is fixedly arranged on the Rockwell hardness tester body 1, and the lifting drive motor 101 and the support sleeve 105 are both fixedly arranged on the motor support seat 102, and the lifting drive motor 101 is connected to the lifting drive screw 103, and the lifting drive screw sleeve 104 is sleeved on the lifting drive screw 1 03, and the lifting drive screw sleeve 104 and the lifting drive screw 103 are threadedly connected, the motor support seat 102 and the lower end of the lifting drive screw sleeve 104 are fixedly connected, the lifting drive screw sleeve 104 and the support sleeve 105 are slidingly connected, and the upper end of the lifting drive screw sleeve 104 extends out of the support sleeve 105, the upper end of the lifting drive screw sleeve 104 extending out of the support sleeve 105 is fixedly connected to the horizontal support plate 106, and the test bench 9 is fixedly set on the upper end surface of the horizontal support plate 106.

[0043] A lifting guide slide 107 is fixedly connected to the outer wall of the lifting drive screw sleeve 104 by screws, a group of vertical guide columns 108 are arranged between the upper and lower end surfaces inside the support sleeve 105, and a group of guide sleeves 109 are arranged on the lifting guide slide 107. The group of guide sleeves 109 and the group of vertical guide columns 108 are arranged in a one-to-one correspondence, and the vertical guide columns 108 and the guide sleeves 109 are slidably connected.

[0044] like Figure 5 , 6 The specimen clamping assembly 20 shown includes a clamping drive motor 201, a rotating seat 202, a group of clamping arms 203 and a clamping arm clamping drive block 204. The test bench 9 is fixed on the upper end surface of the horizontal support plate 106 by screws. The clamping drive motor 201 is arranged on the test bench 9, and the rotating shaft of the clamping drive motor 201 is connected to the rotating seat 202. The middle position of the group of clamping arms 203 is hinged to the test bench 9. The clamping arm clamping drive block 204 is arranged inside the test bench 9, and the clamping arm clamping drive block 204 is connected to the rotating seat 202. One end of the group of clamping arms 203 is connected to the clamping arm clamping drive block 204.

[0045] A stud 205 is provided at the upper end of the rotating seat 202, and a limit screw 206 is provided at the upper end of the stud 205. The clamping arm clamping drive block 204 and the stud 205 are threadedly connected. A cavity 91 is provided inside the test bench 9, and a limit ring 92 is provided on the inner wall of the cavity 91. A limit boss 207 is provided on the outer wall of the lower end of the rotating seat 202. The rotating seat 202 and the clamping arm clamping drive block 204 are arranged in the cavity 91, and the upper end face of the limit boss 207 contacts the lower end face of the limit ring 92. A spring 208 is sleeved on the rotating seat 202, and the spring 208 is located between the upper end face of the limit ring 92 and the lower end face of the clamping arm clamping drive block 204.

[0046] The cross-section of the clamping arm clamping driving block 204 is circular, and an annular groove 209 is provided on the outer circumference of the clamping arm clamping driving block 204. The clamping arm 203 is a right-angle plate, and the clamping arm 203 is connected to the test bench 9 through a rotating shaft. One end of the clamping arm 203 extends into the cavity 91, and the end of the clamping arm 203 extending into the cavity 91 is arranged in the annular groove 209. The end of the clamping arm 203 is rollingly connected to the cavity 91. The group of clamping arms 203 are arranged in a circular array with the center of the clamping arm clamping driving block 204 as the center of the circle.

[0047] The upper end surface of the test bench 9 is provided with a groove 93 with a circular cross-section, and the standard Rockwell hardness block is arranged in the groove 93. The test bench 9 is provided with a group of grooves 94. The group of grooves 94 are arranged in a circular array with the center of the clamping arm clamping drive block 204 as the center of the circle. The group of grooves 94 and the group of clamping arms 203 are arranged in a one-to-one correspondence, and the clamping arms 203 are arranged in the groove 94. The groove 94 is connected with the cavity 91 and the groove 93. The inner wall of the upper end of the group of clamping arms 203 is located in the groove 93. The end of the clamping arm 203 close to the clamping arm clamping drive block 204 is set to a spherical shape, and the clamping arm 203 is provided with a groove three 210 at a position close to the outer circumference of the clamping arm clamping drive block 204, and the groove three 210 is located on the part of the clamping arm 203 extending out of the groove 93.

[0048] Based on the above structure, a working method of an integrated calibration device for a Rockwell hardness tester includes the following steps:

[0049] S1. Place the standard Rockwell hardness block in the groove 93 of the test bench 9;

[0050] S2, the clamping drive motor 201 is started, driving the rotating seat 202 and the stud 205 to rotate. Since the clamping drive block 204 of the clamping arm is threadedly connected with the stud 205, the clamping drive block 204 of the clamping arm descends in the vertical direction along the stud 205;

[0051] S3, the clamping arm clamping driving block 204 moves downward, so that the clamping arm clamping driving block 204 applies pressure to the spherical part of the clamping arm 203, so that a group of clamping arms 203 rotate around the rotating shaft between the clamping arm 203 and the test bench 9, and the upper end of the clamping arm 203 shrinks toward the center of the test bench 9;

[0052] S4, a group of clamping arms 203 act synchronously, and during the gradual contraction of a group of clamping arms 203, a group of clamping arms 203 contact the standard Rockwell hardness block in the groove 93 until a group of clamping arms 203 are pressed tightly against the outer surface of the standard Rockwell hardness block;

[0053] S5, the lifting drive motor 101 is started, driving the lifting drive screw 103 to rotate. Since the lifting drive screw 103 and the lifting drive screw sleeve 104 are threadedly connected, the lifting drive screw sleeve 104 rises in the vertical direction and reaches the set position, and the lifting drive motor 101 stops;

[0054] S6. The Rockwell hardness tester body 1 drives the top connecting block 2 to descend, and the force sensor 3, the hardness tester indenter 5 and the displacement sensor 6 descend synchronously until the hardness tester indenter 5 contacts the upper surface of the standard Rockwell hardness block for hardness detection. At the same time, the force sensor 3 and the displacement sensor 6 collect and analyze data through the data output device 7, thereby obtaining the detection data of the Rockwell hardness tester load and penetration depth.

[0055] S7. Through the depth data obtained from the standard Rockwell hardness block, the system processes the data and corrects the deformation of the force sensor, displacement sensor and connector, etc., the standard hardness value and the measured hardness value can be directly displayed. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. An integrated calibration device for a Rockwell hardness tester, characterized in that: The hardness tester comprises a Rockwell hardness tester body (1), a top connection block (2), a force sensor (3), a connection piece (4), a hardness tester indenter (5), a displacement sensor (6), a data output device (7) and a data transmission line (8), wherein the Rockwell hardness tester body (1) is provided with a standard Rockwell hardness block, the top connection block (2) is connected to the Rockwell hardness tester body (1), the force sensor (3) is connected to the top connection block (2), the connection piece (4) is connected to the force sensor (3), the hardness tester indenter (5) and the displacement sensor (6) are both fixedly arranged on the connection piece (4), and the Rockwell hardness tester body (1) can drive the connection piece (4) to rise and fall in a vertical direction, and the data output device (7) is connected to the Rockwell hardness tester body (1) via the data transmission line (8); Wherein, the force sensor (3) captures and obtains the force value loaded on the hardness tester; The displacement sensor (6) can synchronously obtain the distance the hardness tester indenter (5) falls during the process of the hardness tester indenter (5) being pressed downward; The data output device (7) can select a scale corresponding to the hardness tester, record and store data, and generate raw test data, which can be connected to a certification system to generate a verification certificate; and the data output device (7) can directly display the standard hardness value and the measured hardness value after the data output device (7) corrects the deformation of the force sensor (3), the displacement sensor (6) and the connecting member (4) through the depth data of the displacement sensor (6) obtained on the standard Rockwell hardness block; The Rockwell hardness tester body (1) is provided with a test bench (9) and a specimen clamping assembly (20), the specimen clamping assembly (20) comprising a clamping drive motor (201), a rotating seat (202), a group of clamping arms (203) and a clamping arm clamping drive block (204); the test bench (9) is fixedly arranged on the upper end surface of the horizontal support plate (106) by means of screws; the clamping drive motor (201) is arranged on the test bench (9), and the rotating shaft of the clamping drive motor (201) is connected to the rotating seat (202); the middle position of the group of clamping arms (203) is hinged to the test bench (9); the clamping arm clamping drive block (204) is arranged inside the test bench (9), and the clamping arm clamping drive block (204) is connected to the rotating seat (202); one end of the group of clamping arms (203) is connected to the clamping arm clamping drive block (204); The cross-section of the clamping arm clamping drive block (204) is circular, and an annular groove (209) is provided on the outer circumference of the clamping arm clamping drive block (204); the clamping arm (203) is a right-angle plate, and the clamping arm (203) is connected to the test bench (9) via a rotating shaft; one end of the clamping arm (203) extends into cavity one (91), and the end of the clamping arm (203) extending into cavity one (91) is arranged in the annular groove (209); one end of the clamping arm (203) close to the clamping arm clamping drive block (204) is arranged in a spherical shape, and the end of the clamping arm (203) is rollingly connected to cavity one (91); the group of clamping arms (203) is arranged in a circular array with the center of the clamping arm clamping drive block (204) as the center of the circle.

2. The integrated Rockwell hardness tester calibration device according to claim 1, characterized in that: The force sensor (3) has an accuracy of 0.3 or above; the displacement sensor (6) has an accuracy of 0.2 μm or above.

3. The integrated Rockwell hardness tester calibration device according to claim 1, characterized in that: The Rockwell hardness tester body (1) further comprises a test bench lifting assembly (10), wherein the test bench lifting assembly (10) is fixedly arranged on the Rockwell hardness tester body (1), the test bench (9) and the test bench lifting assembly (10) are fixedly connected, and the test bench (9) is located directly below the hardness tester indenter (5), the specimen clamping assembly (20) is arranged on the test bench (9), a standard Rockwell hardness block can be placed on the test bench (9), and the specimen clamping assembly (20) can clamp and fix the standard Rockwell hardness block.

4. The integrated Rockwell hardness tester calibration device according to claim 3, characterized in that: The test bench lifting assembly (10) comprises a lifting drive motor (101), a motor support seat (102), a lifting drive screw (103), a lifting drive screw sleeve (104), a support sleeve (105) and a horizontal support plate (106); the motor support seat (102) is fixedly arranged on a Rockwell hardness tester body (1); the lifting drive motor (101) and the support sleeve (105) are both fixedly arranged on the motor support seat (102); the lifting drive motor (101) and the lifting drive screw (103) are connected; the lifting drive screw sleeve (104) is sleeved on the lifting drive screw (103); 103), and the lifting drive screw sleeve (104) and the lifting drive screw (103) are threadedly connected, the motor support seat (102) and the lower end of the lifting drive screw sleeve (104) are fixedly connected, the lifting drive screw sleeve (104) and the support sleeve (105) are slidably connected, and the upper end of the lifting drive screw sleeve (104) extends out of the support sleeve (105), the upper end of the lifting drive screw sleeve (104) extending out of the support sleeve (105) is fixedly connected to the horizontal support plate (106), and the test bench (9) is fixedly arranged on the upper end surface of the horizontal support plate (106).

5. The integrated Rockwell hardness tester calibration device according to claim 4, characterized in that: A lifting guide slide plate (107) is fixedly connected to the outer wall of the lifting drive screw sleeve (104) by screws, a group of vertical guide columns (108) is provided between the upper and lower end surfaces inside the support sleeve (105), and a group of guide sleeves (109) is provided on the lifting guide slide plate (107). The group of guide sleeves (109) and the group of vertical guide columns (108) are arranged in a one-to-one correspondence, and the vertical guide columns (108) and the guide sleeves (109) are slidably connected.

6. The integrated Rockwell hardness tester calibration device according to claim 5, characterized in that: The upper end of the rotating seat (202) is provided with a stud (205), the upper end of the stud (205) is provided with a limit screw (206), the clamping arm clamping drive block (204) and the stud (205) are threadedly connected, a cavity (91) is provided inside the test bench (9), a limit ring (92) is provided on the inner wall of the cavity (91), a limit boss (207) is provided on the outer wall of the lower end of the rotating seat (202), the rotating seat (202) and the clamping arm clamping drive block (204) are arranged in the cavity (91), the upper end surface of the limit boss (207) is in contact with the lower end surface of the limit ring (92), and a spring (208) is sleeved on the rotating seat (202), and the spring (208) is located between the upper end surface of the limit ring (92) and the lower end surface of the clamping arm clamping drive block (204).

7. The integrated Rockwell hardness tester calibration device according to claim 6, characterized in that: The upper end surface of the test bench (9) is provided with a groove 1 (93) with a circular cross-section, the standard Rockwell hardness block is arranged in the groove 1 (93), and the test bench (9) is provided with a group of grooves 2 (94), the group of grooves 2 (94) is arranged in a circular array with the center of the clamping arm clamping drive block (204) as the center of the circle, the group of grooves 2 (94) and the group of clamping arms (203) are arranged in a one-to-one correspondence, and the clamping arm (203) is arranged in the groove 2 (94), the groove 2 (94) is connected to the cavity 1 (91) and the groove 1 (93), the inner wall of the upper end of the group of clamping arms (203) is located in the groove 1 (93), and the clamping arm (203) is provided with a groove 3 (210) at a position close to the outer circumference of the clamping arm clamping drive block (204), and the groove 3 (210) is located on the part of the clamping arm (203) extending outside the groove 1 (93).

8. The working method of the integrated calibration device of Rockwell hardness tester according to claim 7, characterized in that: The following steps are involved: S1. Place a standard Rockwell hardness block in groove 1 (93) of the test bench (9); S2, the clamping drive motor (201) is started to drive the rotating seat (202) and the stud (205) to rotate. Since the clamping drive block (204) of the clamping arm and the stud (205) are threadedly connected, the clamping drive block (204) of the clamping arm descends in the vertical direction along the stud (205); S3, the clamping arm clamping drive block (204) moves downward, so that the clamping arm clamping drive block (204) applies pressure to the spherical portion of the clamping arm (203), so that a group of clamping arms (203) rotate around the rotating shaft between the clamping arms (203) and the test bench (9), and the upper end of the clamping arm (203) shrinks toward the center of the test bench (9); S4, a group of clamping arms (203) move synchronously, and during the gradual contraction of the group of clamping arms (203), the group of clamping arms (203) come into contact with the standard Rockwell hardness block in the groove 1 (93), until the group of clamping arms (203) are pressed tightly against the outer surface of the standard Rockwell hardness block; S5, the lifting drive motor (101) is started, driving the lifting drive screw (103) to rotate. Since the lifting drive screw (103) and the lifting drive screw sleeve (104) are threadedly connected, the lifting drive screw sleeve (104) rises in the vertical direction and reaches the set position, and the lifting drive motor (101) stops; S6. The Rockwell hardness tester body (1) drives the top connection block (2) to descend, and the force sensor (3), the hardness tester indenter (5) and the displacement sensor (6) are simultaneously descended until the hardness tester indenter (5) contacts the upper surface of the standard Rockwell hardness block for hardness testing. At the same time, the force sensor (3) and the displacement sensor (6) collect and analyze data through the data output device (7), thereby obtaining the test data of the Rockwell hardness tester load and indentation depth.

Images