CN112730138B - Manual loading fine adjustment device and method for metering verification of material testing machine - Google Patents
Manual loading fine adjustment device and method for metering verification of material testing machine Download PDFInfo
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- CN112730138B CN112730138B CN202110088090.4A CN202110088090A CN112730138B CN 112730138 B CN112730138 B CN 112730138B CN 202110088090 A CN202110088090 A CN 202110088090A CN 112730138 B CN112730138 B CN 112730138B
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- 238000004154 testing of material Methods 0.000 title claims abstract description 131
- 238000012795 verification Methods 0.000 title claims abstract description 44
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a manual loading fine adjustment device and a method for metering verification of a material testing machine, wherein the manual loading fine adjustment device comprises a shell, a transmission mechanism, a moving mechanism and a locking mechanism, wherein the transmission mechanism is arranged on the left side of the inside of the shell, the moving mechanism is arranged on the right side of the transmission mechanism, and the locking mechanism is arranged on the outer side of the moving mechanism; the working method of the manual loading fine adjustment device is that the metering verification of the material testing machine is completed by applying test force through manual fine adjustment control; the manual loading fine adjustment device is suitable for the metering verification process of the material testing machine, has high practical value, can well solve the problem that the loading rate of the material testing machine is difficult to control metering verification, avoids the overload damage of parts such as a standard dynamometer and a material testing machine frame and the like caused by high loading rate and the inaccurate indication value of the manual reading of the testing force of the material testing machine, and ensures that the metering verification of the material testing machine is more convenient, safer, more efficient and more accurate.
Description
Technical Field
The invention relates to a metering verification fine-tuning device and method, in particular to a manual loading fine-tuning device and method for metering verification of a material testing machine, and belongs to the technical field of metering verification of the material testing machine.
Background
The material testing machine is a precise instrument for measuring mechanical properties and technological properties of metal materials, nonmetallic materials, mechanical parts and the like, and metering verification of the material testing machine is one of important contents of mechanical metering. The metering verification of the material testing machine is to compare the test force indication value of a standard instrument (generally a 0.3-level standard dynamometer) with the test force indication value of the material testing machine, calculate the indication value error of the test force of the material testing machine, and further determine whether the metering verification of the material testing machine is qualified.
The metering verification process of the material testing machine commonly used in the mechanical metering field comprises the following steps: 1) Switching on a power supply of the material testing machine and opening computer detection software matched with the material testing machine; 2) A standard dynamometer sensor is arranged between a workbench and a movable cross beam of the material testing machine; 3) The standard dynamometer sensor is correctly connected with a display instrument of the standard dynamometer through a data line, and is powered on; 4) After the computer detection software of the material testing machine and the test force indication value displayed on the display instrument of the standard dynamometer are cleared, a metering verification program of the original factory of the material testing machine is started; 5) The movable cross beam of the material testing machine moves downwards, and after the movable cross beam contacts with the top surface of the standard dynamometer sensor, the material testing machine applies test force to the standard dynamometer sensor through the movable cross beam; 6) When the test force indicating value of the standard dynamometer reaches the test force verification point of the material tester, stopping moving the movable cross beam, and simultaneously stopping applying test force to the standard dynamometer sensor; 7) Reading a material tester test force indication value displayed on computer detection software; 8) Reading a test force indication value displayed on a display instrument of a standard dynamometer; 9) And comparing the test force indication value of the material testing machine with the test force indication value of the standard dynamometer to judge whether the test force value of the material testing machine is accurate or not, and finally obtaining the conclusion of whether the metering verification of the material testing machine is qualified or not.
In the metering verification process of the conventional material testing machine, the existing partial material testing machine cannot accurately control the self loading rate, such as a material testing machine with the maximum test force of (100-1000) N for non-metallic material measurement; in the metering verification process of the material testing machine, when the material testing machine applies test force to the sensor of the standard dynamometer through the movable cross beam, the frame of the standard dynamometer and the material testing machine is easily damaged due to overload due to the fact that the loading rate of the material testing machine is high, the condition that the manual reading of the test force indication value of the material testing machine is inaccurate easily occurs, and the metering verification accuracy of the material testing machine is greatly affected.
Therefore, in order to solve the problem that the loading rate is difficult to control and verify when the material testing machine is used for metering and detecting, it is highly desirable to develop a fine adjustment device capable of applying a test force to the material testing machine through manual control, so that the metering and detecting of the material testing machine is more convenient, safe, efficient and accurate.
Disclosure of Invention
In order to solve the defects of the technology, the invention provides a manual loading fine adjustment device and a manual loading fine adjustment method for metering verification of a material testing machine.
In order to solve the technical problems, the invention adopts the following technical scheme: a manual loading fine adjustment device for metering verification of a material testing machine comprises a shell, a transmission mechanism, a moving mechanism and a locking mechanism, wherein the transmission mechanism is arranged on the left side of the interior of the shell, the moving mechanism is arranged on the right side of the transmission mechanism, and the locking mechanism is arranged on the outer side of the moving mechanism;
The transmission mechanism comprises a bevel gear shaft, a first gear shaft and a second gear shaft which are sequentially and transversely arranged side by side from bottom to top; the bevel gear a of the bevel gear shaft is positioned at the right end of the bevel gear a; the first gear of the first gear shaft is positioned at the left part of the first gear; the second gear of the second gear shaft is positioned at the right end of the second gear; the bevel gear shaft is fixedly provided with a gear a corresponding to the first gear in position, and the gear a is meshed with the first gear; a gear b corresponding to the second gear is fixedly arranged on the first gear shaft, and the gear b is meshed with the second gear; the left end of the bevel gear shaft extends out of the shell and is provided with a loading large hand wheel, and the left end of the second gear shaft extends out of the shell and is provided with a loading small hand wheel;
The moving mechanism comprises a bevel gear b, a screw shaft and a moving platform, and the screw shaft is vertically arranged in the shell; the bevel gear b is fixedly arranged at the lower part of the screw shaft and corresponds to the bevel gear a in position, and is meshed with the bevel gear a; the upper part of the screw rod shaft is connected with a screw rod nut sleeve in a threaded fit manner; the movable platform is fixedly arranged at the upper end of the screw rod nut sleeve; a key groove is formed in the lower part of the screw nut sleeve;
the locking mechanism comprises a locking hand wheel, a connecting screw rod and a flat key, and the flat key is arranged in a key groove of the screw rod nut sleeve; the flat key is provided with a threaded hole; the right part of the shell is provided with a vertical movable hole groove; one end of the connecting screw rod is fixedly connected with the locking hand wheel, and the other end of the connecting screw rod penetrates through the movable hole groove and then is inserted into the threaded hole of the flat key, and the connecting screw rod is in threaded fit connection with the flat key.
Further, a limiting plate is fixedly arranged at the upper end of the screw rod shaft; and a limiting step matched with the limiting plate is correspondingly arranged on the inner wall of the screw-nut sleeve, and the limiting step is matched with the limiting plate to limit the lifting height of the mobile platform.
The working method of the manual loading fine adjustment device for metering verification of the material testing machine comprises the following steps:
I, mounting a manual loading fine adjustment device:
switching on a power supply of the material testing machine and opening computer detection software matched with the material testing machine, wherein the computer detection software can display a test force indication value of the material testing machine;
Starting a material testing machine, and rapidly adjusting the distance between a movable cross beam of the material testing machine and a workbench of the movable cross beam, so as to ensure that the distance between the top of a standard dynamometer sensor and the bottom of the movable cross beam is 20-30 mm after the manual loading fine-tuning device and the standard dynamometer sensor are installed;
The manual loading fine adjustment device is fixedly arranged on a workbench, the standard dynamometer sensor is fixed on a moving platform of the manual loading fine adjustment device, the moving cross beam of the material testing machine is kept to be stationary, and the material testing machine sensor is positioned at the bottom of the moving cross beam; after the fixing, each part sequentially comprises a workbench, a manual loading fine tuning device, a standard dynamometer sensor, a material testing machine sensor and a movable cross beam from bottom to top, and all the parts are kept on the same axis from top to bottom;
The standard dynamometer sensor and the standard dynamometer display instrument are correctly connected through a data line, and are connected with power supply; after computer detection software of the material testing machine and a test force indication value displayed on a display instrument of a standard dynamometer are cleared, a measurement and control system of the material testing machine is thrown away, and a manual loading fine adjustment device is used for applying test force to finish metering verification of the test force of the material testing machine;
II, metering verification of test force of a material testing machine:
The method comprises the steps of firstly, rotating a loading large hand wheel clockwise to enable a screw-nut sleeve of a manual loading fine adjustment device to drive a moving platform to quickly rise, enabling the moving platform to drive a standard dynamometer sensor arranged on the moving platform to quickly rise, enabling the distance between the standard dynamometer sensor and a material testing machine sensor positioned at the bottom of a moving beam to gradually decrease until the standard dynamometer sensor is contacted with the material testing machine sensor, then changing a loading small hand wheel to perform slow loading and fine adjustment control, rotating the loading small hand wheel clockwise, enabling the loading small hand wheel to drive the screw-nut sleeve to rise through a transmission mechanism so as to drive the moving platform to rise to cause axial force in the vertical direction, and applying test force to the material testing machine sensor and the standard dynamometer sensor at the same time;
When the test force indication value on the display instrument of the standard dynamometer reaches the test force detection point of the material tester, locking the manual loading fine adjustment device by using the locking mechanism, and further locking the test force applied by the manual loading fine adjustment device at the moment, so as to prevent the test forces corresponding to the material tester and the standard dynamometer from falling back; after the test force indication values corresponding to the material testing machine and the standard dynamometer are stable, reading the test force indication value of the material testing machine displayed on the computer detection software, and reading the test force indication value of the standard dynamometer displayed on the standard dynamometer display instrument;
and comparing the test force indication value of the material testing machine with the test force indication value of the standard dynamometer to judge whether the test force value of the material testing machine is accurate or not, and finally obtaining the conclusion of whether the metering verification of the material testing machine is qualified or not.
Further, when the manual loading fine adjustment device is locked by the locking mechanism, the locking hand wheel is pushed leftwards to enable the left end of the connecting screw rod to prop against the tightening surface a, the locking hand wheel is rotated, the locking hand wheel drives the connecting screw rod to rotate, so that a flat key matched with threads of the connecting screw rod moves rightwards to compress the tightening surface b, the flat key of the compressing surface b is relatively static with the shell, and the flat key is arranged in a key groove of the screw rod nut sleeve, so that the screw rod nut sleeve is relatively static with the shell, and the screw rod nut sleeve cannot drive the movable platform to move up and down, thereby locking the manual loading fine adjustment device by the locking mechanism;
When releasing the locking of locking mechanism to manual fine setting device that adds, reverse rotation locking hand wheel, locking hand wheel drive connecting screw reverse rotation release the flat key to compress tightly face b, because the flat key sets up in the keyway of lead screw nut cover, the flat key can reciprocate and restrict the rotation of lead screw nut cover along the horizontal direction together along with the lead screw nut cover for the lead screw nut cover can not rotate only can reciprocate for the casing, and the lead screw nut cover can drive moving platform and remove, and locking mechanism releases the locking of manual fine setting device that adds.
The manual loading fine adjustment device is suitable for the metering verification process of the material testing machine and has high practical value. The manual loading fine adjustment device can better solve the problem that the loading rate of the material testing machine in the prior art is difficult to control and verify in the metering verification process, and the manual loading fine adjustment device is used for carrying out slow loading and fine adjustment, so that the conditions of overload damage of parts such as a standard dynamometer and a material testing machine frame and inaccurate indication value of the test force of the manually-read material testing machine caused by larger loading rate can be avoided, and the metering verification of the material testing machine is more convenient, safer, more efficient and more accurate.
Drawings
Fig. 1 is a schematic structural diagram of a manual loading fine tuning device according to the present invention.
Fig. 2 is a left side view of the manual load fine adjustment device (the load large hand wheel and the load small hand wheel are not shown).
Fig. 3 is a right side view of the manual loading trimmer.
Fig. 4 is a side view of a manual loading trimmer.
FIG. 5 is a schematic diagram of the relationship between the manual loading fine adjustment device and the material testing machine.
Fig. 6 is an enlarged view of a portion of the locking mechanism of fig. 1.
In the figure: 1. a housing; 2. a bevel gear shaft; 3. a first gear shaft; 4. a second gear shaft; 5. a gear a; 6. bevel gear a; 7. a first gear; 8. a gear b; 9. a second gear; 10. a large hand wheel is loaded; 11. a small loading hand wheel is added; 12. bevel gear b; 13. a screw shaft; 14. a screw-nut sleeve; 15. a mobile platform; 16. a limiting plate; 17. locking a hand wheel; 18. a connecting screw; 19. a flat key; 20. a key slot; 21. a movable hole groove; 22. a limit step; 23. a base; 24. a work table; 25. a manual loading fine adjustment device; 26. a standard dynamometer sensor; 27. a movable cross beam; 28. a material testing machine sensor; 29. a material testing machine base; 30. an upper cross beam of the material testing machine; 31. a material testing machine load rack; 32. a computer host; 33. a computer display; 34. a standard dynamometer display instrument;
A. a pressing surface a; B. a compression surface b;
Alpha, a material testing machine test force indication value; beta, standard dynamometer test force indication.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in fig. 1 and 4, a manual loading fine adjustment device for metering verification of a material testing machine comprises a shell 1, a transmission mechanism, a moving mechanism and a locking mechanism, wherein the transmission mechanism is arranged on the left side inside the shell 1, the moving mechanism is arranged on the right side of the transmission mechanism, and the locking mechanism is arranged on the outer side of the moving mechanism;
The transmission mechanism comprises a bevel gear shaft 2, a first gear shaft 3 and a second gear shaft 4, wherein the bevel gear shaft 2, the first gear shaft 3 and the second gear shaft 4 are sequentially and transversely arranged side by side from bottom to top; the bevel gear a6 of the bevel gear shaft 2 is positioned at the right end; the first gear 7 of the first gear shaft 3 is positioned at the left part of the first gear shaft; the second gear 9 of the second gear shaft 4 is positioned at the right end of the second gear shaft; the bevel gear shaft 2 is fixedly provided with a gear a5 corresponding to the first gear 7 in position, and the gear a5 is meshed with the first gear 7; a gear b8 corresponding to the second gear 9 in position is fixedly arranged on the first gear shaft 3, and the gear b8 is meshed with the second gear 9; the left end of the bevel gear shaft 2 extends out of the shell 1 and is provided with a loading large hand wheel 10, and the left end of the second gear shaft 4 extends out of the shell 1 and is provided with a loading small hand wheel 11;
The moving mechanism comprises a bevel gear b12, a screw shaft 13 and a moving platform 15, and the screw shaft 13 is vertically arranged in the shell 1; the bevel gear b12 is fixedly arranged at the lower part of the screw shaft 13 and corresponds to the bevel gear a6 in position, and the bevel gear b12 is meshed with the bevel gear a 6; the upper part of the screw rod shaft 13 is connected with a screw nut sleeve 14 through screw thread fit; the movable platform 15 is fixedly arranged at the upper end of the screw-nut sleeve 14; a key slot 20 is arranged at the lower part of the screw nut sleeve 14; a limiting plate 16 is fixedly arranged at the upper end of the screw shaft 13; the inner wall of the screw nut sleeve 14 is correspondingly provided with a limit step 22 matched with the limit plate 16, and when the screw nut sleeve moves upwards to the condition that the limit step is contacted with the limit plate, the limit plate fixed at the upper end of the screw shaft limits the limit step, so that the lifting height of the movable platform is limited.
The locking mechanism can lock the manual loading fine adjustment device and comprises a locking hand wheel 17, a connecting screw 18 and a flat key 19, wherein the flat key 19 is arranged in a key groove 20 of the screw-nut sleeve; the flat key 19 is provided with a threaded hole; the right part of the shell 1 is provided with a vertical movable hole groove 21; one end of the connecting screw rod 18 is fixedly connected with the locking hand wheel 17, the other end of the connecting screw rod 18 penetrates through the movable hole groove 21 and then is inserted into the threaded hole of the flat key 19, and the connecting screw rod 18 is in threaded fit connection with the flat key 19.
As shown in fig. 6, when the locking mechanism is used to lock the manual loading fine adjustment device, the locking hand wheel 17 is pushed leftwards to enable the left end of the connecting screw rod to prop against the propping surface a (i.e. the inner wall of the key slot 20), the locking hand wheel 17 is rotated, the locking hand wheel 17 drives the connecting screw rod 18 to rotate so that the flat key 19 in threaded fit with the connecting screw rod moves rightwards to compress the compacting surface b (i.e. the inner wall of the shell 1), the flat key compressing the compacting surface b is relatively static with the shell 1, and as the flat key is arranged in the key slot 20 of the screw rod nut sleeve 14, the screw rod nut sleeve 14 is relatively static with the shell 1, and the screw rod nut sleeve 14 cannot drive the moving platform to move up and down, so that the locking of the manual loading fine adjustment device of the locking mechanism is realized;
When the locking of the manual loading fine adjustment device by the locking mechanism is released, the locking hand wheel 17 is reversely rotated, the locking hand wheel 17 drives the connecting screw 18 to reversely rotate to release the compression of the flat key 19 on the compression surface b (namely the inner wall of the shell 1), and as the flat key 19 is arranged in the key groove 20 of the screw-nut sleeve, the flat key 19 can move up and down along with the screw-nut sleeve 14 and limit the rotation of the screw-nut sleeve along the horizontal direction, so that the screw-nut sleeve can not rotate relative to the shell 1 and only move up and down, the screw-nut sleeve can drive the moving platform to move, and the locking of the manual loading fine adjustment device by the locking mechanism is released.
The working method of the manual loading fine adjustment device for metering verification of the material testing machine comprises the following steps:
I, mounting a manual loading fine adjustment device:
switching on a power supply of the material testing machine and opening computer detection software matched with the material testing machine, wherein the computer detection software can display a test force indication value of the material testing machine;
starting the material testing machine, and rapidly adjusting the distance between a movable cross beam 27 of the material testing machine and a workbench 24 of the movable cross beam, so as to ensure that the distance between the top of a standard dynamometer sensor and the bottom of the movable cross beam is 20-30 mm after the manual loading fine adjustment device 25 and the standard dynamometer sensor 26 are installed;
as shown in fig. 5, a manual loading fine adjustment device 25 is fixedly installed on a workbench 24, a standard dynamometer sensor 26 is fixed on a moving platform 15 of the manual loading fine adjustment device, a material testing machine moving beam 27 is kept stationary, and a material testing machine sensor 28 is positioned at the bottom of the moving beam 27; the fixed parts are a workbench 24, a manual loading fine adjustment device 25, a standard dynamometer sensor 26, a material testing machine sensor 28 and a movable cross beam 27 in sequence from bottom to top, and all the parts are kept on the same axis from top to bottom;
The standard dynamometer sensor 26 and the standard dynamometer display instrument 34 are correctly connected through a data line, and the power is turned on; after computer detection software of the material testing machine and a test force indication value displayed on a display instrument of a standard dynamometer are cleared, a measurement and control system of the material testing machine is thrown away, and a manual loading fine adjustment device is used for applying test force to finish metering verification of the test force of the material testing machine;
II, metering verification of test force of a material testing machine:
Firstly, rotating the loading large hand wheel 10 clockwise, and rotating the loading large hand wheel 10 to drive the bevel gear shaft 2 to rotate so that the bevel gear a rotates to drive the bevel gear b meshed with the bevel gear a to rotate; the bevel gear b rotates to drive the screw rod shaft to rotate; because the locking mechanism is in an unlocked state at this time, under the action of the locking mechanism, the flat key in the key groove limits the screw nut sleeve so that the screw nut sleeve in threaded fit with the screw shaft cannot rotate along with the screw shaft, the screw nut sleeve can only move up and down, the moving platform is driven to move by the screw nut sleeve, and the moving platform 15 is driven to quickly rise by the loading large hand wheel, as shown by the broken lines in fig. 2 and 3; the movable platform rises to drive the standard dynamometer sensor 26 placed on the movable platform to rise rapidly; the distance between the standard dynamometer sensor and the material testing machine sensor 28 positioned at the bottom of the movable cross beam is gradually reduced until the standard dynamometer sensor is in contact with the material testing machine sensor, then the small loading hand wheel 11 is replaced for slow loading and fine adjustment control, the small loading hand wheel is rotated clockwise, the small loading hand wheel drives the gear shaft II to rotate, the gear II is driven to rotate, the gear b meshed with the gear II is driven to rotate, the gear b is fixed on the gear shaft I, the gear I is driven to rotate, the gear a meshed with the gear I is driven to rotate, the gear a is fixed on the bevel gear shaft, the bevel gear shaft and the bevel gear a on the bevel gear shaft are driven to rotate, the bevel gear b meshed with the bevel gear a is driven to rotate, and the movement of the screw nut sleeve is driven to move the movable platform; the small loading hand wheel drives the screw-nut sleeve 14 to ascend through the transmission mechanism so as to drive the movable platform 15 to ascend to cause axial force in the vertical direction, so that test force is applied to the material tester sensor and the standard dynamometer sensor at the same time;
The manual loading fine adjustment device provided by the invention has the advantages that the number of teeth of the second gear is smaller than that of the gear b, and the number of teeth of the first gear is smaller than that of the gear a, so that the rotation loading small hand wheel realizes two-stage transmission ratio increase after the transmission of the second gear and the gear b and the transmission of the first gear and the gear a, and the slow loading and fine adjustment control can be performed through the loading small hand wheel; according to the invention, the small loading hand wheel drives the screw nut sleeve 14 to rise through the transmission mechanism to cause axial force in the vertical direction, so that test force is applied to the material testing machine sensor and the standard force meter sensor simultaneously, slow loading and fine adjustment can be realized, and the conditions that the standard force meter, the material testing machine frame and other parts are overloaded and damaged due to high loading rate in the process of metering and verification of the material testing machine, and the test force indication value of the manually-read material testing machine is inaccurate are avoided.
When the test force indication value on the display instrument 34 of the standard dynamometer reaches the test force detection point of the material testing machine, locking the manual loading fine adjustment device by using the locking mechanism, and further locking the test force applied by the manual loading fine adjustment device at the moment, so that the test force corresponding to the material testing machine and the standard dynamometer is prevented from falling back, and the condition that the test force indication value of the material testing machine is inaccurate to read is avoided; after the test force indication values corresponding to the material testing machine and the standard dynamometer are stable, reading the test force indication value of the material testing machine displayed on the computer detection software, and reading the test force indication value of the standard dynamometer displayed on the standard dynamometer display instrument 34;
and comparing the test force indication value of the material testing machine with the test force indication value of the standard dynamometer to judge whether the test force value of the material testing machine is accurate or not, and finally obtaining the conclusion of whether the metering verification of the material testing machine is qualified or not.
The manual loading fine adjustment device is suitable for the metering verification process of the material testing machine and has high practical value. The manual loading fine adjustment device can better solve the problem that the loading rate of the material testing machine in the prior art is difficult to control and verify in the metering verification process, the situation that the standard dynamometer, the material testing machine frame and other parts are damaged due to overload caused by the fact that the loading rate is high can be avoided when the manual loading fine adjustment device is used for loading, the situation that the manual reading of the test force indication value of the material testing machine is inaccurate is avoided, and the metering verification of the material testing machine is more convenient, safer, efficient and accurate.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, but is also intended to be limited to the following claims.
Claims (4)
1. A manual loading micromatic setting for material testing machine metrological verification, its characterized in that: the device comprises a shell (1), a transmission mechanism, a moving mechanism and a locking mechanism, wherein the transmission mechanism is arranged on the left side of the inside of the shell (1), the moving mechanism is arranged on the right side of the transmission mechanism, and the locking mechanism is arranged on the outer side of the moving mechanism;
the transmission mechanism comprises a bevel gear shaft (2), a first gear shaft (3) and a second gear shaft (4), wherein the bevel gear shaft (2), the first gear shaft (3) and the second gear shaft (4) are sequentially and transversely arranged side by side from bottom to top; the bevel gear a (6) of the bevel gear shaft (2) is positioned at the right end of the bevel gear; a first gear (7) of the first gear shaft (3) is positioned at the left part of the first gear shaft; a second gear (9) of the second gear shaft (4) is positioned at the right end of the second gear shaft; a gear a (5) corresponding to the first gear (7) in position is fixedly arranged on the bevel gear shaft (2), and the gear a (5) is meshed with the first gear (7); a gear b (8) corresponding to the second gear (9) in position is fixedly arranged on the first gear shaft (3), and the gear b (8) is meshed with the second gear (9); the left end of the bevel gear shaft (2) extends out of the shell (1) and is provided with a loading big hand wheel (10), and the left end of the second gear shaft (4) extends out of the shell (1) and is provided with a loading small hand wheel (11);
The moving mechanism comprises a bevel gear b (12), a screw rod shaft (13) and a moving platform (15), and the screw rod shaft (13) is vertically arranged in the shell (1); the bevel gear b (12) is fixedly arranged at the lower part of the screw shaft (13) and corresponds to the bevel gear a (6), and the bevel gear b (12) is meshed with the bevel gear a (6); the upper part of the screw rod shaft (13) is connected with a screw rod nut sleeve (14) through threaded fit; the movable platform (15) is fixedly arranged at the upper end of the screw nut sleeve (14); a key groove (20) is formed in the lower part of the screw nut sleeve (14);
The locking mechanism comprises a locking hand wheel (17), a connecting screw (18) and a flat key (19), wherein the flat key (19) is arranged in a key groove (20) of the screw-nut sleeve; the flat key (19) is provided with a threaded hole; a vertical movable hole groove (21) is formed in the right part of the shell (1); one end of the connecting screw rod (18) is fixedly connected with the locking hand wheel (17), the other end of the connecting screw rod passes through the movable hole groove (21) and then is inserted into the threaded hole of the flat key (19), and the connecting screw rod (18) is in threaded fit connection with the flat key (19).
2. The manual load fine tuning device for a metrological verification of a material testing machine as claimed in claim 1, wherein: a limiting plate (16) is fixedly arranged at the upper end of the screw rod shaft (13); and a limiting step (22) matched with the limiting plate (16) is correspondingly arranged on the inner wall of the screw-nut sleeve (14), and the limiting step is matched with the limiting plate to limit the lifting height of the mobile platform.
3. A method of operating a manual load fine adjustment device for metrological verification of a material testing machine as claimed in claim 1 or claim 2, wherein: the working method comprises the following steps:
I, mounting a manual loading fine adjustment device:
switching on a power supply of the material testing machine and opening computer detection software matched with the material testing machine, wherein the computer detection software can display a test force indication value of the material testing machine;
Starting a material testing machine, and rapidly adjusting the distance between a movable cross beam (27) of the material testing machine and a workbench (24) of the movable cross beam, so as to ensure that the distance between the top of a standard dynamometer sensor and the bottom of the movable cross beam is 20-30 mm after a manual loading fine adjustment device (25) and the standard dynamometer sensor (26) are installed;
The manual loading fine adjustment device (25) is fixedly arranged on the workbench (24), the standard dynamometer sensor (26) is fixed on the moving platform (15) of the manual loading fine adjustment device, the movable cross beam (27) of the material testing machine is kept to be stationary, and the material testing machine sensor (28) is positioned at the bottom of the movable cross beam (27); the fixed parts are sequentially provided with a workbench (24), a manual loading fine adjustment device (25), a standard dynamometer sensor (26), a material testing machine sensor (28) and a movable cross beam (27) from bottom to top, and all the parts are kept on the same axis from top to bottom;
The standard dynamometer sensor (26) and the standard dynamometer display instrument (34) are correctly connected through a data line, and are powered on; after computer detection software of the material testing machine and a test force indication value displayed on a display instrument of a standard dynamometer are cleared, a measurement and control system of the material testing machine is thrown away, and a manual loading fine adjustment device is used for applying test force to finish metering verification of the material testing machine;
II, metering verification of test force of a material testing machine:
The method comprises the steps of firstly, rotating a loading large hand wheel (10) clockwise to enable a screw nut sleeve (14) of a manual loading fine adjustment device to drive a movable platform (15) to quickly rise, enabling a standard dynamometer sensor (26) arranged on the movable platform to quickly rise, enabling the distance between the standard dynamometer sensor and a material testing machine sensor (28) arranged at the bottom of a movable cross beam to gradually decrease until the standard dynamometer sensor is contacted with the material testing machine sensor, then, using a loading small hand wheel (11) to carry out slow loading and fine adjustment control, rotating the loading small hand wheel clockwise, enabling the screw nut sleeve (14) to be driven by a transmission mechanism to rise so as to drive the movable platform (15) to cause vertical axial force, and applying test force to the material testing machine sensor and the standard dynamometer sensor simultaneously;
When the test force indication value on the display instrument (34) of the standard dynamometer reaches the test force detection point of the material tester, locking the manual loading fine adjustment device by using the locking mechanism, and further locking the test force applied by the manual loading fine adjustment device at the moment, so as to prevent the test forces corresponding to the material tester and the standard dynamometer from falling back; after the corresponding test force indication values of the material testing machine and the standard dynamometer are stable, reading the test force indication value of the material testing machine displayed on computer detection software, and reading the test force indication value of the standard dynamometer displayed on a standard dynamometer display instrument (34);
and comparing the test force indication value of the material testing machine with the test force indication value of the standard dynamometer to judge whether the test force value of the material testing machine is accurate or not, and finally obtaining the conclusion of whether the metering verification of the material testing machine is qualified or not.
4. A method of operating a manual load fine adjustment for metrological verification of a material testing machine as claimed in claim 3, wherein: when the manual loading fine adjustment device is locked by the locking mechanism, the locking hand wheel (17) is pushed leftwards to enable the left end of the connecting screw rod to prop against the pushing surface a, the locking hand wheel (17) is rotated, the locking hand wheel (17) drives the connecting screw rod (18) to rotate, a flat key (19) in threaded fit with the connecting screw rod is moved rightwards to press the pressing surface b, the flat key of the pressing surface b is relatively static with the shell (1), and the flat key is arranged in a key groove (20) of the screw nut sleeve (14), so that the screw nut sleeve (14) is relatively static with the shell (1), and the screw nut sleeve (14) cannot drive the moving platform to move up and down, so that the locking mechanism can lock the manual loading fine adjustment device;
When the locking mechanism is released to lock the manual loading fine adjustment device, the locking hand wheel (17) is reversely rotated, the locking hand wheel (17) drives the connecting screw (18) to reversely rotate to release the compression of the flat key (19) to the compression surface b, and as the flat key (19) is arranged in the key groove (20) of the screw-nut sleeve, the flat key (19) can move up and down along with the screw-nut sleeve (14) and limit the rotation of the screw-nut sleeve along the horizontal direction, so that the screw-nut sleeve can not rotate and only move up and down relative to the shell (1), the screw-nut sleeve can drive the moving platform to move, and the locking mechanism releases the locking of the manual loading fine adjustment device.
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|---|---|---|---|---|
| CN2079293U (en) * | 1990-07-13 | 1991-06-19 | 胡祥银 | Multifunctional material testing machine |
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN214150277U (en) * | 2021-01-22 | 2021-09-07 | 王斌 | Manual loading fine adjustment device for metering and calibrating material testing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592746A (en) * | 2018-06-26 | 2018-09-28 | 中信戴卡股份有限公司 | A kind of sample marking distance and length-measuring appliance of having no progeny |
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|---|---|---|---|---|
| CN2079293U (en) * | 1990-07-13 | 1991-06-19 | 胡祥银 | Multifunctional material testing machine |
| KR20110057475A (en) * | 2009-11-24 | 2011-06-01 | (주)프론틱스 | Apparatus for indentation test involving micom and evaluating method of residual stress using the same |
| CN214150277U (en) * | 2021-01-22 | 2021-09-07 | 王斌 | Manual loading fine adjustment device for metering and calibrating material testing machine |
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| Title |
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| 电子式万能试验机检定中的误差控制;邓玉湖;;中国计量;20170210(02);全文 * |
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