CN113358507B - An integrated calibration device for Rockwell hardness tester and its working method - Google Patents
An integrated calibration device for Rockwell hardness tester and its working method Download PDFInfo
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- 238000012360 testing method Methods 0.000 claims description 86
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- 238000007550 Rockwell hardness test Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/40—Investigating hardness or rebound hardness
- G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid
- G01N3/44—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors being put under a minor load and a subsequent major load, i.e. Rockwell system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/62—Manufacturing, calibrating, or repairing devices used in investigations covered by the preceding subgroups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
- G01N2203/0078—Hardness, compressibility or resistance to crushing using indentation
- G01N2203/008—Residual indentation measurement
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Abstract
本发明公开了一种洛氏硬度计的一体式检定装置以及工作方法，属于硬度计检测技术领域，包括洛氏硬度计主体、顶端连接块、力传感器、连接件、硬度计压头、位移传感器、数据输出装置和数据传输线；其中，所述力传感器抓取并获加载于硬度计的力值；所述位移传感器在硬度计压头下压过程中可同步获取硬度计压头下落的距离；所述数据输出装置可选取硬度计对应的标尺，记录和存储数据，并生成检测原始数据，可与证书系统连接，生成检定证书。本发明专利的洛氏硬度计的一体式检定装置，采用一体化设计，减少人为操作带来的误差，位移的线性精度优于0.2μm，力传感器精度为0.3级及以上；并且稳定性高、使用寿命长，可替代传统的检定设备及方法。
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
The invention belongs to the technical field of sclerometer detection, and particularly relates to an integrated calibrating device for a Rockwell hardness meter. The invention also relates to a working method of the integrated calibrating device of the Rockwell hardness tester.
Background
The Rockwell hardness test is to apply test force (initial test force F0 and total test force F0 + F1) to the surface of the tested material twice successively by using a standard pressure head, and press the pressure head into the surface of the sample under the action of the test force. After the total test force has been maintained for a certain period of time, the main test force F1 is removed and the indentation depth is measured with the initial test force F0 remaining, the difference between the indentation depth at the total test force and the indentation depth at the initial test force (the so-called residual indentation depth) being used to characterize the hardness, the greater the residual indentation depth value, the lower the hardness value and vice versa.
The Rockwell hardness tester pressure value, indentation depth and hardness indication are three main items that must be done for the first test in the testing procedure of the hardness tester. The traditional method needs a plurality of devices, namely a set of force measuring standard machine for verifying initial force and return force values. And measuring the indentation size by using a special optical instrument to calculate the indentation depth, and calculating the hardness indication value according to the relation between the depth and the hardness under the corresponding load, wherein the special depth measuring device is used for detecting the indentation depth measuring device of the sclerometer.
The traditional measurement mode has the following defects that firstly, the standard devices are too many, a plurality of force standard machines, special optical instruments and a depth measuring device calibrating instrument are involved, secondly, the portable microscope and the vertical optical instrument are inconvenient to bring to a customer site, moreover, the Rockwell hardness tester cannot be practically sent for inspection due to weight and installation conditions, thirdly, certain data errors are caused by the operation of different operators, thirdly, the data acquisition sources are too many, the measurement process is complex, uncertain components are introduced in data calculation, and the data processing is inconvenient.
Based on the four reasons, the traditional measuring method has low detection efficiency and high requirements on detection personnel, so the detection device of the Rockwell hardness tester is provided.
Disclosure of Invention
The invention aims to overcome the defects, and aims to provide an integrated calibrating device for a Rockwell hardness tester, which solves the problems that the time and the trouble are wasted, a large number of standard hardness blocks are consumed, and the obtained specific value is not an error and is a limit value of whether the standard hardness blocks are qualified or not in the calibrating process of the Rockwell hardness tester in the prior art.
The integrated verification device comprises a Rockwell hardness tester main body, a top connecting block, a force sensor, a connecting piece, a hardness tester pressure head, a displacement sensor, a data output device and a data transmission line, wherein the top connecting block is connected with the Rockwell hardness tester main body, the force sensor is connected with the top connecting block, the connecting piece is connected with the force sensor, the hardness tester pressure head and the displacement sensor are fixedly arranged on the connecting piece, the Rockwell hardness tester main body can drive the connecting piece to lift in the vertical direction, the data output device is connected with the Rockwell hardness tester main body through the data transmission line, the force sensor is used for capturing and obtaining a force value loaded on the hardness tester, the displacement sensor can be used for synchronously obtaining the falling distance of the hardness tester pressure head in the pressing process of the hardness tester pressure head, the data output device can be used for selecting a scale corresponding to the hardness tester, recording and storing data, and generating detection original data, and can be connected with a certificate system to generate a verification certificate. The integrated calibrating device for the Rockwell hardness tester adopts an integrated design, reduces errors caused by manual operation, has the linear accuracy of displacement better than 0.2 mu m and the accuracy of a force sensor of 0.3 level or more, has high stability and long service life, and can replace the traditional calibrating equipment and method.
Furthermore, in the integrated calibrating device for the Rockwell hardness tester, the precision of the force sensor is 0.3 level and above, and the precision of the displacement sensor is 0.2 mu m and above.
Further, the integrated calibrating device of the Rockwell hardness tester comprises a test table, a test table lifting assembly and a test piece clamping assembly, wherein the test table, the test table lifting assembly and the test piece clamping assembly are arranged on the Rockwell hardness tester main body, the test table and the test table lifting assembly are fixedly connected, the test table is located under a pressure head of the Rockwell hardness tester, the test piece clamping assembly is arranged on the test table, a standard Rockwell hardness block can be placed on the test table, and the test piece clamping assembly can be used for clamping and fixing the standard Rockwell hardness block. On the basis of a traditional Rockwell hardness tester, the lifting structure is set to be automatic, and the test clamping assembly is arranged, so that the stability of a standard Rockwell hardness block can be maintained in the detection process.
Further, the integrated calibrating device of the Rockwell hardness tester comprises a lifting driving motor, a motor supporting seat, a lifting driving screw rod sleeve, a supporting sleeve and a horizontal supporting plate, wherein the motor supporting seat is fixedly arranged on the Rockwell hardness tester main body, the lifting driving motor and the supporting sleeve are fixedly arranged on the motor supporting seat, the lifting driving motor is connected with the lifting driving screw rod, the lifting driving screw rod sleeve is arranged on the lifting driving screw rod, the lifting driving screw rod sleeve is in threaded connection with the lifting driving screw rod, the lower end parts of the motor supporting seat and the lifting driving screw rod sleeve are fixedly connected, the lifting driving screw rod sleeve is in sliding connection with the supporting sleeve, the upper end part of the lifting driving screw rod sleeve extends out of the supporting sleeve and is fixedly connected with the horizontal supporting plate, and the test bench is fixedly arranged on the upper end face of the horizontal supporting plate. Through the structure of lead screw and screw sleeve, can be under control system's effect, accurate control test bench's lifting height.
Further, in the integrated calibrating device for the Rockwell hardness tester, the lifting guide sliding plate is fixedly connected to the outer wall of the lifting drive screw sleeve through screws, a group of vertical guide posts are arranged between the upper end face and the lower end face of the inner part of the support sleeve, a group of guide sliding sleeves are arranged on the lifting guide sliding plate, the group of guide sliding sleeves and the group of vertical guide posts are arranged in one-to-one correspondence, and the vertical guide posts are in sliding connection with the guide sliding sleeves. The guide structure keeps the stability of vertical movement.
Further, the integrated calibrating device of the Rockwell hardness tester comprises a clamping driving motor, a rotating seat, a group of clamping arms and clamping arm clamping driving blocks, wherein the test table is fixedly arranged on the upper end face of the horizontal supporting plate through screws, the clamping driving motor is arranged on the test table, a rotating shaft of the clamping driving motor is connected with the rotating seat, the middle positions of the group of clamping arms are hinged with the test table, the clamping arm clamping driving blocks are arranged inside the test table, the clamping arm clamping driving blocks are connected with the rotating seat, and one ends of the group of clamping arms are connected with the clamping arm clamping driving blocks.
Further, the integrated calibrating device of the Rockwell hardness tester comprises a stud arranged at the upper end of the rotating seat, a limit screw arranged at the upper end of the stud, a clamping arm clamping driving block and a stud in threaded connection, a first cavity arranged in the test bench, a limit ring arranged on the inner wall of the first cavity, a limit boss arranged on the outer wall of the lower end of the rotating seat, a spring arranged on the rotating seat in a sleeved mode and in contact with the upper end face of the limit boss and the lower end face of the limit ring, and a spring arranged between the upper end face of the limit ring and the lower end face of the clamping arm clamping driving block. Through the rotation of motor drive double-screw bolt for the arm centre gripping drive piece can reciprocate, and arm centre gripping drive piece reciprocates, can apply pressure to the upper and lower face of arm respectively, thereby makes the arm rotation centre gripping wait to detect the work piece.
Further, in the integrated calibrating device for the Rockwell hardness tester, the section of the clamping arm clamping driving block is circular, an annular groove is formed in the outer circumference of the clamping arm clamping driving block, the clamping arm is a rectangular plate, the clamping arm is connected with the test bench through a rotating shaft, one end of the clamping arm extends into the cavity I, the end of the clamping arm extending into the cavity I is arranged in the annular groove, the end of the clamping arm is in rolling connection with the cavity I, and the group of clamping arms are arranged in an annular array mode by taking the center of the clamping arm clamping driving block as the center of a circle.
Further, in the integrated calibrating device for the Rockwell hardness tester, the upper end face of the test bench is provided with the groove I with the circular cross section, the standard Rockwell hardness block is arranged in the groove I, the test bench is provided with the groove II, the groove II is arranged in an annular array mode by taking the center of the clamping arm clamping driving block as the center of a circle, the groove II and the clamping arm II are arranged in the groove II in a one-to-one correspondence mode, the groove II is communicated with the cavity I and the groove I, the inner wall of the upper end part of the clamping arm II is positioned in the groove I, one end of the clamping arm close to the clamping arm clamping driving block is arranged into a ball shape, the groove III is arranged at the position of the clamping arm close to the outer circumference of the clamping arm clamping driving block, and the groove III is positioned on the part of the clamping arm extending out of the groove I.
The invention discloses a working method of an integrated calibrating device of a Rockwell hardness tester, which comprises the following steps:
S1, placing a standard Rockwell hardness block in a groove I of a test table;
S2, starting a clamping driving motor, driving a rotating seat and a stud to rotate, wherein the clamping arm clamps the driving block and the stud to be in threaded connection, so that the clamping arm clamps the driving block to descend along the vertical direction of the stud;
S3, the clamping arm clamping driving block moves downwards, so that the clamping arm clamping driving block applies pressure to the spherical part of the clamping arm, a group of clamping arms rotate around a rotating shaft between the clamping arm and the test bench, and the upper end part of the clamping arm contracts towards the center of the test bench;
S4, synchronously acting a group of clamping arms, wherein the group of clamping arms are contacted with the standard Rockwell hardness block in the groove I in the gradual contraction process until the group of clamping arms are tightly pressed on the outer surface of the standard Rockwell hardness block;
S5, starting a lifting driving motor to drive the lifting driving screw rod to rotate, and lifting the lifting driving screw rod along the vertical direction to a set position as the lifting driving screw rod is in threaded connection with the lifting driving screw rod sleeve, and stopping the lifting driving motor;
S6, the Rockwell hardness tester main body drives the top connecting block to descend, the force sensor, the hardness tester pressure head and the displacement sensor synchronously descend until the hardness tester pressure head contacts the upper surface of the standard Rockwell hardness block to carry out hardness detection, and meanwhile, the force sensor and the displacement sensor acquire data through the data output device and analyze the data, so that detection data of the load and the pressing depth of the Rockwell hardness tester are obtained.
S7, the standard hardness value and the actually measured hardness value can be directly displayed after the system data are processed and the deformation of the force value sensor, the displacement sensor, the connecting piece and the like is corrected through the depth data obtained from the standard Rockwell hardness block.
According to the integrated calibrating device for the Rockwell hardness tester, disclosed by the invention, the displacement sensor and the hardness tester pressure head are integrated into a whole, the displacement sensor changes to judge the measuring method of the Rockwell hardness tester state, the intelligent judgment of the displacement sensor is adopted, and the result of detecting data can be displayed to a user in a very visual way through the data output device, so that the using step is simplified, the display screen can also retain the last measuring result even if the measuring step is finished, and the user can record conveniently. When the working method of the integrated calibrating device for the Rockwell hardness tester is used for measuring the next test piece, the working principle is simple and easy to implement, fewer detection personnel are needed, the detection can be completed by only one staff, and the detection efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of an embodiment of an integrated calibration device for a rockwell hardness scale according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of an integrated assay device for a Rockwell hardness tester according to the present invention;
FIG. 3 is a diagram of an embodiment of an integrated assay device for a Rockwell hardness tester according to the present invention;
FIG. 4 is a schematic structural view of the test stand lifting assembly according to the present invention;
FIG. 5 is a schematic view of a specimen grip assembly according to the present invention;
FIG. 6 is a top view of a specimen grip assembly according to the present invention.
In the figure, a Rockwell hardness tester main body 1, a top end connecting block 2, a force sensor 3, a connecting piece 4, a hardness tester pressure head 5, a displacement sensor 6, a data output device 7, a data transmission line 8, a test table 9, a first cavity 91, a limiting ring 92, a first groove 93, a second groove 94, a test table lifting assembly 10, a lifting driving motor 101, a motor supporting seat 102, a lifting driving screw 103, a lifting driving screw sleeve 104, a supporting sleeve 105, a horizontal supporting plate 106, a lifting guiding slide plate 107, a vertical guiding column 108, a guiding sliding sleeve 109, a test piece clamping assembly 20, a clamping driving motor 201, a rotating seat 202, a clamping arm 203, a clamping arm clamping driving block 204, a stud 205, a limiting screw 206, a limiting boss 207, a spring 208, an annular groove 209 and a groove III 210.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1
The integrated verification device for the Rockwell hardness tester shown in fig. 1 and 2 comprises a Rockwell hardness tester main body1, a top end connecting block 2, a force sensor 3, a connecting piece 4, a hardness tester pressure head 5, a displacement sensor 6, a data output device 7 and a data transmission line 8, wherein the top end connecting block 2 is connected with the Rockwell hardness tester main body1, the force sensor 3 is connected with the top end connecting block 2, the connecting piece 4 is connected with the force sensor 3, the hardness tester pressure head 5 and the displacement sensor 6 are fixedly arranged on the connecting piece 4, the Rockwell hardness tester main body1 can drive the connecting piece 4 to lift in the vertical direction, the data output device 7 is connected with the Rockwell hardness tester main body1 through the data transmission line 8, the force sensor 3 can capture and acquire a force value loaded on the hardness tester, the displacement sensor 6 can synchronously acquire a falling distance of the hardness tester pressure head 5 in the pressing down process, the data output device 7 can select a corresponding scale of the hardness tester, record and store data, and generate detection original data, and can be connected with a certificate system to generate a verification certificate. The precision of the force sensor 3 is 0.3 level or more, and the precision of the displacement sensor 6 is 0.2 μm or more.
The top connecting block 2 is connected with a measured hardness tester, the force sensor 3 captures and obtains a force value loaded on the hardness tester through the action of pressing down the hardness tester pressing head 5, the hardness tester pressing head 5 is hard connected with the displacement sensor 6 through a connecting piece, the displacement sensor 6 can synchronously obtain the falling distance of the pressing head in the pressing down process of the hardness tester pressing head 5, special analysis software is arranged in the data output device 7, a scale corresponding to the hardness tester can be selected, data are recorded and stored, detection original data are generated, and the detection original data can be connected with a certificate system to generate a verification certificate. The displacement sensor 6 is hard-connected with the hardness tester pressure head 5 through a connecting piece, and the data output device 7 is connected with the detection device for transmitting signals and data and providing electric energy. The top connecting block 2 and the connecting piece 4 are of an integrated structure, and the force sensor 3 and the displacement sensor 6 are embedded into a connecting mechanism formed by the top connecting block 2 and the connecting piece 4.
Example two
The test bench 9, the test bench lifting assembly 10 and the test piece clamping assembly 20 are arranged on the Rockwell hardness tester main body 1 shown in fig. 3, the test bench lifting assembly 10 is fixedly arranged on the Rockwell hardness tester main body 1, the test bench 9 and the test bench lifting assembly 10 are fixedly connected, the test bench 9 is positioned right below the hardness tester pressure head 5, the test piece 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 test piece clamping assembly 20 can be used for clamping and fixing the standard Rockwell hardness block.
The test bench lifting assembly 10 shown in fig. 4 comprises a lifting driving motor 101, a motor supporting seat 102, a lifting driving screw 103, a lifting driving screw sleeve 104, a supporting sleeve 105 and a horizontal supporting plate 106, wherein the motor supporting seat 102 is fixedly arranged on a Rockwell hardness tester main body 1, the lifting driving motor 101 and the supporting sleeve 105 are fixedly arranged on the motor supporting seat 102, the lifting driving motor 101 is connected with the lifting driving screw 103, the lifting driving screw sleeve 104 is sleeved on the lifting driving screw 103, the lifting driving screw sleeve 104 is in threaded connection with the lifting driving screw 103, the motor supporting seat 102 is fixedly connected with the lower end part of the lifting driving screw sleeve 104, the lifting driving screw sleeve 104 is in sliding connection with the supporting sleeve 105, the upper end part of the lifting driving screw sleeve 104 extends out of the supporting sleeve 105 and is fixedly connected with the horizontal supporting plate 106, and the test bench 9 is fixedly arranged on the upper end surface of the horizontal supporting plate 106.
The outer wall of the lifting drive screw rod sleeve 104 is fixedly connected with a lifting guide slide plate 107 through screws, a group of vertical guide posts 108 are arranged between the upper end face and the lower end face of the inside of the support sleeve 105, a group of guide slide sleeves 109 are arranged on the lifting guide slide plate 107, the group of guide slide sleeves 109 and the group of vertical guide posts 108 are arranged in one-to-one correspondence, and the vertical guide posts 108 are in sliding connection with the guide slide sleeves 109.
The test piece clamping assembly 20 shown in fig. 5 and 6 comprises a clamping driving motor 201, a rotating seat 202, a group of clamping arms 203 and a clamping arm clamping driving block 204, wherein the test table 9 is fixedly arranged on the upper end face of the horizontal supporting plate 106 through screws, the clamping driving motor 201 is arranged on the test table 9, a rotating shaft of the clamping driving motor 201 is connected with the rotating seat 202, the middle position of the group of clamping arms 203 is hinged with the test table 9, the clamping arm clamping driving block 204 is arranged inside the test table 9, the clamping arm clamping driving block 204 is connected with the rotating seat 202, and one end of the group of clamping arms 203 is connected with the clamping arm clamping driving block 204.
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 driving block 204 is in threaded connection with the stud 205, a first cavity 91 is arranged in the test bench 9, a limit ring 92 is arranged on the inner wall of the first cavity 91, a limit boss 207 is arranged on the outer wall of the lower end of the rotating seat 202, the rotating seat 202 and the clamping arm clamping driving block 204 are arranged in the first cavity 91, the upper end face of the limit boss 207 is in contact with the lower end face of the limit ring 92, a spring 208 is sleeved on the rotating seat 202, and the spring 208 is positioned between the upper end face of the limit ring 92 and the lower end face of the clamping arm clamping driving block 204.
The cross section of arm grip drive piece 204 is circular to be equipped with annular groove 209 on the outer circumference of arm grip drive piece 204, arm grip 203 is the right-angle plate, and arm grip 203 is connected through pivot and test bench 9, the one end of arm grip 203 extends to in the cavity one 91, and arm grip 203 extends to the tip setting of cavity one 91 in annular groove 209, the tip and the cavity one 91 roll connection of arm grip 203, a set of arm grip 203 uses the center of arm grip drive piece 204 as the centre of a circle to set up according to annular array's mode.
The upper end face of the test bench 9 is provided with a first groove 93 with a circular cross section, the standard Rockwell hardness block is arranged in the first groove 93, the test bench 9 is provided with a second groove 94, the second groove 94 is arranged in an annular array mode by taking the center of the clamping arm clamping driving block 204 as the center of a circle, the second groove 94 and the clamping arm 203 are arranged in a one-to-one correspondence mode, the clamping arm 203 is arranged in the second groove 94, the second groove 94 is communicated with the first cavity 91 and the first groove 93, the inner wall of the upper end part of the clamping arm 203 is positioned in the first groove 93, one end of the clamping arm 203, which is close to the clamping arm clamping driving block 204, is provided with a third groove 210, which is positioned on the part, extending out of the first groove 93, of the clamping arm 203.
Based on the structure, the working method of the integrated calibrating device of the Rockwell hardness tester comprises the following steps:
s1, placing a standard Rockwell hardness block in a groove one 93 of a test bench 9;
S2, starting a clamping driving motor 201, driving a rotating seat 202 and a stud 205 to rotate, wherein the clamping arm clamping driving block 204 descends along the vertical direction of the stud 205 because the clamping arm clamping driving block 204 is in threaded connection with the stud 205;
S3, the clamping arm clamping driving block 204 moves downwards, so that the clamping arm clamping driving block 204 applies pressure to the spherical part of the clamping arm 203, a group of clamping arms 203 rotate around a rotating shaft between the clamping arm 203 and the test table 9, and the upper end part of the clamping arm 203 contracts towards the center of the test table 9;
S4, a group of clamping arms 203 synchronously act, and the group of clamping arms 203 gradually contract to contact with the standard Rockwell hardness block in the groove I93 until the group of clamping arms 203 are tightly pressed on the outer surface of the standard Rockwell hardness block;
S5, starting the lifting drive motor 101 to drive the lifting drive screw 103 to rotate, and lifting the lifting drive screw 104 to a set position due to the fact that the lifting drive screw 103 is in threaded connection with the lifting drive screw sleeve 104, and stopping the lifting drive motor 101;
S6, the Rockwell hardness tester main body 1 drives the top connecting block 2 to descend, the force sensor 3, the hardness tester pressure head 5 and the displacement sensor 6 synchronously descend until the hardness tester pressure head 5 contacts the upper surface of the standard Rockwell hardness block to detect hardness, and meanwhile, the force sensor 3 and the displacement sensor 6 acquire data through the data output device 7 and analyze the data, so that detection data of the load and the pressing depth of the Rockwell hardness tester are obtained.
S7, after the system data processing, the correction of the deformation of the force value sensor, the displacement sensor, the connecting piece and the like through the depth data obtained on the standard Rockwell hardness Block, the standard hardness value and the actual measured hardness value can be directly displayed, which are only the preferred embodiments of the invention, and it should be pointed out that a plurality of improvements can be made by those skilled in the art without departing from the principle of the invention, and the improvements are also considered as the protection scope of the invention.
Claims (8)
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| CN202110804447.4A CN113358507B (en) | 2021-07-16 | 2021-07-16 | An integrated calibration device for Rockwell hardness tester and its working method |
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| CN202110804447.4A CN113358507B (en) | 2021-07-16 | 2021-07-16 | An integrated calibration device for Rockwell hardness tester and its working method |
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| CN113358507A CN113358507A (en) | 2021-09-07 |
| CN113358507B true CN113358507B (en) | 2025-02-25 |
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| CN206470141U (en) * | 2017-01-21 | 2017-09-05 | 深圳市骏强五金制品有限公司 | A kind of Rockwell apparatus |
| CN210513982U (en) * | 2019-08-08 | 2020-05-12 | 鄂尔多斯市神东天隆矿山机械有限责任公司 | Rockwell hardness meter |
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