CN112730138A - Manual loading fine adjustment device and method for metering and calibrating material testing machine - Google Patents
Manual loading fine adjustment device and method for metering and calibrating material testing machine Download PDFInfo
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Abstract
The invention discloses a manual loading fine adjustment device and a method for metrological 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, the transmission mechanism is arranged on the left side in 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 to finish the metering verification of the material testing machine by manually fine-adjusting and controlling the applied testing force; the manual loading fine-adjustment device is suitable for the metrological verification process of the material testing machine, has strong practical value, can better solve the problem that the loading speed of the material testing machine is difficult to control metrological verification, avoids the conditions of overload damage of components such as a standard dynamometer, a frame of the material testing machine and the like and inaccurate manual reading of the test force indication value of the material testing machine due to the large loading speed, and ensures that the metrological verification of the material testing machine is more convenient, safe, efficient and accurate.
Description
Technical Field
The invention relates to a metering calibration fine adjustment device and method, in particular to a manual loading fine adjustment device and method for metering calibration of a material testing machine, and belongs to the technical field of metering calibration of material testing machines.
Background
The material testing machine is a precision instrument for measuring the mechanical properties and the process properties of metal materials, non-metal materials, mechanical parts and the like, and the metering and verification of the material testing machine is one of the important contents of mechanical metering. The metrological verification of the material testing machine is to compare the indicating value of the testing force of a standard instrument (generally a 0.3-grade standard dynamometer) with the indicating value of the testing force of the material testing machine, calculate the indicating value error of the testing force of the material testing machine and further determine whether the metrological verification of the material testing machine is qualified.
The measurement and verification process of a material testing machine commonly used in the field of mechanical measurement comprises the following steps: 1) switching on a power supply of the material testing machine and turning on computer detection software matched with the material testing machine; 2) installing a standard dynamometer sensor between a workbench and a movable cross beam of the material testing machine; 3) connecting a standard dynamometer sensor with a display instrument of a standard dynamometer correctly through a data line, and connecting a power supply; 4) after the test force indication values displayed on the computer detection software of the material testing machine and the display instrument of the standard dynamometer are cleared, starting a metering verification program allocated by the original factory of the material testing machine; 5) the moving beam of the material testing machine moves downwards, and after the moving beam contacts the top surface of the standard dynamometer sensor, the material testing machine applies testing force to the standard dynamometer sensor through the moving beam; 6) when the test force indication value of the standard dynamometer reaches the test force verification point of the material testing machine, the movable beam stops moving, and meanwhile, the standard dynamometer sensor stops applying test force; 7) reading a test force indication value of the material testing machine 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 whether the metering verification of the material testing machine is qualified or not.
In the metering and calibrating process of the common material testing machine, the existing part of the material testing machine cannot accurately control the loading rate per se, for example, the maximum testing force is (100-1000) N, and the material testing machine is used for measuring the non-metal material; in the process of metrological verification of the material testing machine, when the material testing machine applies a testing force to a sensor of a standard dynamometer through a movable beam, the standard dynamometer and a frame of the material testing machine are easily damaged due to overload because the loading rate of the material testing machine is high, and the condition that the indication value of the testing force of the material testing machine is read manually is easy to cause inaccuracy, so that the metrological verification accuracy of the material testing machine is greatly influenced.
Therefore, in order to solve the problem that the loading rate is difficult to control and test during the metering and testing of part of the material testing machine, a fine adjustment device capable of applying a testing force to the material testing machine through manual control needs to be developed urgently, so that the metering and testing of the material testing machine are more convenient, safe, efficient and accurate.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a manual loading fine adjustment device and method for material testing machine metering verification.
In order to solve the technical problems, the invention adopts the technical scheme that: a manual loading fine adjustment device for metering and calibrating 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 in 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, and the bevel gear shaft, the first gear shaft and the second gear shaft 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 shaft; the first gear of the first gear shaft is positioned at the left part of the first gear shaft; a second gear of the second gear shaft is positioned at the right end of the second gear shaft; a gear a corresponding to the first gear is fixedly arranged on the bevel gear shaft, 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 meshed with the second gear; the left end of the bevel gear shaft extends outwards out of the shell and is provided with a large loading hand wheel, and the left end of the second gear shaft extends outwards out of the shell and is provided with a small loading hand wheel;
the moving mechanism comprises a bevel gear b, a screw rod shaft and a moving platform, and the screw rod shaft is vertically arranged inside 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 the bevel gear b is meshed with the bevel gear a; the upper part of the screw shaft is connected with a screw nut sleeve in a threaded fit manner; the movable platform is fixedly arranged at the upper end of the screw rod nut sleeve; the lower part of the screw rod nut sleeve is provided with a key groove;
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, 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.
Furthermore, a limiting plate is fixedly arranged at the upper end of the screw shaft; the inner wall of the screw rod nut sleeve is correspondingly provided with a limiting step matched with the limiting plate, and the limiting step is matched with the limiting plate to limit the rising height of the moving platform.
The working method of the manual loading fine adjustment device for the metering verification of the material testing machine comprises the following steps:
i, installation of a manual loading fine adjustment device:
switching on a power supply of the material testing machine and turning on 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, quickly adjusting the distance between a movable cross beam of the material testing machine and a workbench of the material testing machine, and ensuring 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 and the standard dynamometer sensor are installed;
fixedly installing a manual loading fine adjustment device on a workbench, fixing a standard dynamometer sensor on a moving platform of the manual loading fine adjustment device, keeping a moving beam of a material testing machine to be stopped, and positioning the material testing machine sensor at the bottom of the moving beam; after being fixed, all the parts are sequentially provided with a workbench, a manual loading fine adjustment 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 sensor of the standard dynamometer is correctly connected with the display instrument of the standard dynamometer through a data line, and a power supply is connected; 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 reset, a measurement and control system of the material testing machine is abandoned, and a manual loading fine-tuning device is used for applying test force to finish the metrological verification of the test force of the material testing machine;
II, metrological verification of the test force of the material testing machine:
firstly, a large loading hand wheel is rotated clockwise, a screw rod nut sleeve of a manual loading fine adjustment device drives a moving platform to rise quickly, the moving platform drives a standard dynamometer sensor placed on the moving platform to rise quickly, the distance between the standard dynamometer sensor and a material tester sensor positioned at the bottom of a moving beam is gradually reduced until the standard dynamometer sensor is in contact with the material tester sensor, a small loading hand wheel is used for slow loading and fine adjustment control, the small loading hand wheel is rotated clockwise, the small loading hand wheel drives the screw rod nut sleeve to rise through a transmission mechanism and further drives the moving platform to rise to cause vertical axial force, and test force is applied to the material tester sensor and the standard dynamometer sensor simultaneously;
when the test force indication value on the standard dynamometer display instrument 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; 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 a display instrument of the standard dynamometer;
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 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 to be tightly propped against the jacking surface a, the locking hand wheel is rotated to drive the connecting screw to rotate, so that the flat key in threaded fit with the connecting screw moves rightwards to press the pressing surface b, the flat key of the pressing surface b is relatively static with the shell, and the flat key is arranged in the key groove of the screw rod nut sleeve, so that the screw rod nut sleeve and the shell are relatively static, the screw rod nut sleeve cannot drive the moving platform to move upwards and downwards, and the locking of the locking mechanism on the manual loading fine-adjustment device is realized;
when the locking of the locking mechanism on the manual loading fine-adjustment device is released, the locking hand wheel is rotated reversely, the locking hand wheel drives the connecting screw to rotate reversely to release the compression of the flat key on the compression surface b, the flat key is arranged in the key groove of the screw rod nut sleeve, the flat key can move up and down along with the screw rod nut sleeve and limit the rotation of the screw rod nut sleeve along the horizontal direction, so that the screw rod nut sleeve cannot rotate relative to the shell and can only move up and down, the screw rod nut sleeve can drive the moving platform to move, and the locking mechanism releases the locking of the manual loading fine-adjustment device.
The manual loading fine adjustment device is suitable for the metrological 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 process of metrological verification, the manual loading fine-adjustment device is used for slow loading and fine adjustment, the conditions that parts such as a standard dynamometer, a material testing machine frame and the like are overloaded and damaged due to the high loading rate and the indication value of the testing force of the material testing machine is not accurate by manual reading can be avoided, and the metrological verification of the material testing machine is more convenient, safe, efficient and accurate.
Drawings
Fig. 1 is a schematic structural diagram of a manual loading fine adjustment device of the invention.
Fig. 2 is a left side view of the manual loading fine adjustment device (the loading large hand wheel and the loading small hand wheel are not shown).
Fig. 3 is a right side view of the manually loaded fine adjustment device.
Fig. 4 is a side view of a manually loaded vernier device.
FIG. 5 is a schematic diagram of the position relationship between the manual loading fine-tuning device and the material testing machine.
Fig. 6 is a partially enlarged view of the latch 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. a bevel gear a; 7. a first gear; 8. a gear b; 9. a second gear; 10. loading a large hand wheel; 11. loading a small hand wheel; 12. a bevel gear b; 13. a screw shaft; 14. a screw rod nut sleeve; 15. a mobile platform; 16. a limiting plate; 17. locking a hand wheel; 18. connecting a screw rod; 19. a flat bond; 20. a keyway; 21. a movable hole groove; 22. a limiting step; 23. a base; 24. a work table; 25. a manual loading fine adjustment device; 26. a standard dynamometer sensor; 27. moving the beam; 28. a material testing machine sensor; 29. a material testing machine base; 30. an upper beam of the material testing machine; 31. a material testing machine load frame; 32. a computer host; 33. a computer display; 34. a standard dynamometer display instrument;
A. a jacking surface a; B. a pressing surface b;
alpha, a test force indication value of a material testing machine; beta, standard dynamometer test force indication value.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 4, a manual loading fine adjustment device for metrological 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 in 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 located at the right end thereof; 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; a gear a5 corresponding to the first gear 7 is fixedly arranged on the bevel gear shaft 2, and the gear a5 is meshed with the first gear 7; a gear b8 corresponding to the second gear 9 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 outwards 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 outwards 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, wherein the screw shaft 13 is vertically arranged inside 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, and the bevel gear b12 is meshed with the bevel gear a 6; the upper part of the screw shaft 13 is connected with a screw nut sleeve 14 through thread matching; the movable platform 15 is fixedly arranged at the upper end of the feed screw nut sleeve 14; the lower part of the feed screw nut sleeve 14 is provided with a key groove 20; a limiting plate 16 is fixedly arranged at the upper end of the screw shaft 13; the inner wall of the feed screw nut sleeve 14 is correspondingly provided with a limiting step 22 matched with the limiting plate 16, and when the feed screw nut sleeve moves upwards until the limiting step is contacted with the limiting plate, the limiting plate fixed at the upper end of the feed screw shaft limits the limiting step, so that the lifting height of the moving platform is limited.
The locking mechanism can lock the manual loading fine-adjustment device and comprises a locking hand wheel 17, a connecting screw rod 18 and a flat key 19, wherein the flat key 19 is arranged in a key groove 20 of a screw rod 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 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.
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 push the left end of the connecting screw rod against the pressing surface a (i.e. the inner wall of the key groove 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 press the pressing surface b (i.e. the inner wall of the shell 1), the flat key pressing the pressing surface b is relatively static with the shell 1, because the flat key is arranged in the key groove 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 upwards and downwards, thereby realizing the locking of the locking;
when the locking of the locking mechanism on the manual loading fine-adjustment device is released, the locking hand wheel 17 is rotated reversely, the locking hand wheel 17 drives the connecting screw rod 18 to rotate reversely to release the pressing of the flat key 19 on the pressing 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 rod nut sleeve, the flat key 19 can move up and down along with the screw rod nut sleeve 14 and limit the rotation of the screw rod nut sleeve along the horizontal direction, so that the screw rod nut sleeve cannot rotate relative to the shell 1 and can only move up and down, the screw rod nut sleeve can drive the moving platform to move, and the locking mechanism can release the locking of the manual loading fine-adjustment device.
The working method of the manual loading fine adjustment device for the metering verification of the material testing machine comprises the following steps:
i, installation of a manual loading fine adjustment device:
switching on a power supply of the material testing machine and turning on 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, quickly adjusting the distance between a movable beam 27 of the material testing machine and a workbench 24 of the material testing machine, and ensuring that the distance between the top of a standard force measuring instrument sensor and the bottom of the movable beam is 20-30 mm after a manual loading fine-adjustment device 25 and the standard force measuring instrument sensor 26 are installed;
as shown in fig. 5, the manual loading fine-tuning device 25 is fixedly installed on the workbench 24, the standard load cell sensor 26 is fixed on the moving platform 15 of the manual loading fine-tuning device, the moving beam 27 of the material testing machine is kept to be stationary, and the sensor 28 of the material testing machine is positioned at the bottom of the moving beam 27; after being fixed, the components 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 beam 27 from bottom to top, and the components are kept on the same axis from top to bottom;
the standard dynamometer sensor 26 is properly connected with the standard dynamometer display instrument 34 through a data line, and the power supply is switched on; 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 reset, a measurement and control system of the material testing machine is abandoned, and a manual loading fine-tuning device is used for applying test force to finish the metrological verification of the test force of the material testing machine;
II, metrological verification of the test force of the material testing machine:
firstly, clockwise rotating an loading large hand wheel 10, and rotating the loading large hand wheel 10 to drive a bevel gear shaft 2 to rotate, so that a bevel gear a rotates to drive a bevel gear b meshed with the bevel gear a to rotate; the bevel gear b rotates to drive the screw rod shaft to rotate; at the moment, the locking mechanism is in an unlocked state, under the action of the locking mechanism, the flat key in the key groove limits the screw rod nut sleeve, so that the screw rod nut sleeve in threaded fit with the screw rod shaft cannot rotate along with the screw rod shaft, the screw rod nut sleeve can only move up and down, the moving platform is driven to move through the screw rod nut sleeve, and the purpose that the moving platform 15 is driven to quickly rise through a loaded large hand wheel is achieved, as shown by dotted lines in fig. 2 and 3; the mobile platform rises to drive the standard dynamometer sensor 26 placed on the mobile platform to rise rapidly; the distance between the standard force measuring instrument sensor and the material testing machine sensor 28 positioned at the bottom of the movable beam is gradually reduced until the standard force measuring instrument sensor is contacted with the material testing machine sensor, then the slow loading and fine adjustment control is carried out by using the loading small hand wheel 11, the loading small hand wheel is rotated clockwise, the loading small hand wheel drives the second gear shaft to rotate, so that the second gear rotates, thereby driving the gear b meshed with the second gear to rotate, because the gear b is fixed on the first gear shaft, thereby driving the first gear shaft and the first gear thereon to rotate, and further driving the gear a meshed with the first gear to rotate, because 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, and the lead screw shaft is driven to rotate by driving the bevel gear b meshed with the bevel gear a, so that the moving of the lead screw nut sleeve is realized to drive the moving platform to move; the small loading hand wheel drives the screw rod nut sleeve 14 to ascend through a transmission mechanism so as to drive the moving platform 15 to ascend to cause an axial force in the vertical direction, so that a test force is applied to a material testing machine sensor and a standard dynamometer sensor at the same time;
the manual loading fine adjustment device is provided with the gear number of the second gear which is smaller than the gear number of the gear b, and the gear number of the first gear which is smaller than the gear number of the gear a, so that the two-stage transmission ratio is increased after the small loading hand wheel is rotated to be transmitted by the second gear and the gear b and the first gear and the gear a, and the slow loading and fine adjustment control can be carried out through the small loading hand wheel; the small loading hand wheel provided by the invention drives the screw rod nut sleeve 14 to rise through the transmission mechanism to cause an axial force in the vertical direction, so that a test force is applied to the sensor of the material testing machine and the sensor of the standard force measuring instrument at the same time, slow loading and fine adjustment can be realized, and the conditions that parts such as the standard force measuring instrument, a rack of the material testing machine and the like are overloaded and damaged and the indication value of the test force of the material testing machine is not accurate by manual reading due to large loading rate in the process of metering and calibrating the material testing machine are avoided.
When the indicated value of the test force on the display instrument 34 of the standard dynamometer reaches the test force detection point of the material testing machine, the locking mechanism is used for locking the manual loading fine adjustment device, and further the test force applied by the manual loading fine adjustment device is locked, so that the test forces corresponding to the material testing machine and the standard dynamometer are prevented from falling back, and the condition that the read indicated value of the test force of the material testing machine is not accurate 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 whether the metering verification of the material testing machine is qualified or not.
The manual loading fine adjustment device is suitable for the metrological 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 a material testing machine in the prior art is difficult to control and verify in the process of metrological verification, the situation that parts such as a standard dynamometer, a material testing machine frame and the like are overloaded and damaged due to the fact that the loading rate is high can be avoided by using the manual loading fine-adjustment device for loading, the situation that the indication value of the testing force of the material testing machine is inaccurate through manual reading is avoided, and the metrological verification of the material testing machine is more convenient, safe, 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, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (4)
1. The utility model provides a manual loading micromatic setting for material testing machine metrological verification which 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 in 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 shaft; the 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; the bevel gear shaft (2) is fixedly provided with a gear a (5) corresponding to the first gear (7), and the gear a (5) is meshed with the first gear (7); a gear b (8) corresponding to the second gear (9) 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 outwards 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 outwards 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 shaft (13) and a moving platform (15), and the screw shaft (13) is vertically arranged inside 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 shaft (13) is connected with a screw nut sleeve (14) in a threaded fit manner; the moving platform (15) is fixedly arranged at the upper end of the feed screw nut sleeve (14); a key groove (20) is formed in the lower part of the feed screw nut sleeve (14);
the locking mechanism comprises a locking hand wheel (17), a connecting screw rod (18) and a flat key (19), and the flat key (19) is arranged in a key groove (20) of the screw rod 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 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).
2. The manual loading fine-tuning device for the metrological verification of materials testing machines of claim 1, characterized in that: a limiting plate (16) is fixedly arranged at the upper end of the screw shaft (13); the inner wall of the feed screw nut sleeve (14) is correspondingly provided with a limiting step (22) matched with the limiting plate (16), and the limiting step is matched with the limiting plate to limit the rising height of the mobile platform.
3. A method of operating a manually-loaded vernier device for material testing machine metrological verification as claimed in claim 1 or 2, characterized in that: the working method comprises the following steps:
i, installation of a manual loading fine adjustment device:
switching on a power supply of the material testing machine and turning on 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, quickly adjusting the distance between a movable cross beam (27) of the material testing machine and a workbench (24) of the material testing machine, and ensuring that the distance between the top of a standard force measuring instrument sensor and the bottom of the movable cross beam is 20-30 mm after a manual loading fine-adjustment device (25) and the standard force measuring instrument sensor (26) are installed;
fixedly mounting a manual loading fine-adjustment device (25) on a workbench (24), fixing a standard dynamometer sensor (26) on a moving platform (15) of the manual loading fine-adjustment device, keeping a moving beam (27) of a material testing machine to stop, and positioning a sensor (28) of the material testing machine at the bottom of the moving beam (27); after being fixed, all the 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 connected with a power supply; 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 reset, a measurement and control system of the material testing machine is abandoned, and a manual loading fine-tuning device is used for applying test force to finish the metering verification of the material testing machine;
II, metrological verification of the test force of the material testing machine:
firstly, a large loading hand wheel (10) is rotated clockwise, a screw rod nut sleeve (14) of a manual loading fine-adjustment device drives a moving platform (15) to rise quickly, the moving platform drives a standard dynamometer sensor (26) placed on the moving platform to rise quickly, the distance between the standard dynamometer sensor and a material testing machine sensor (28) located at the bottom of a moving beam is gradually reduced until the standard dynamometer sensor is contacted with the material testing machine sensor, then a small loading hand wheel (11) is used for slow loading and fine adjustment control, the small loading hand wheel is rotated clockwise, the small loading hand wheel drives the screw rod nut sleeve (14) to rise through a transmission mechanism, further drives the moving platform (15) to rise to cause an axial force in the vertical direction, and then the material testing machine sensor and the standard dynamometer sensor are applied with testing force at the same time;
when the indicated value of the test force on the display instrument (34) of the standard dynamometer reaches the test force detection point of the material testing machine, the locking mechanism is used for locking the manual loading fine adjustment device, and further the test force applied by the manual loading fine adjustment device is locked, so that the test forces corresponding to the material testing machine and the standard dynamometer are prevented 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 a display instrument (34) of the standard dynamometer;
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 whether the metering verification of the material testing machine is qualified or not.
4. The method of claim 3, wherein the manual load fine adjustment device comprises: when the manual loading fine-tuning device is locked by the locking mechanism, the locking hand wheel (17) is pushed leftwards to enable the left end of the connecting screw to be tightly propped against the jacking surface a, the locking hand wheel (17) is rotated, the locking hand wheel (17) drives the connecting screw (18) to rotate to enable the flat key (19) in threaded fit with the connecting screw to move rightwards to press the pressing surface b, the flat key pressing the pressing surface b is relatively static with the shell (1), the flat key is arranged in the key groove (20) of the screw-nut sleeve (14), the screw-nut sleeve (14) is further relatively static with the shell (1), and the screw-nut sleeve (14) cannot drive the moving platform to move upwards and downwards, so that the locking mechanism can lock the manual loading fine-tuning device;
when the locking of the locking mechanism on the manual loading fine-adjustment device is released, the locking hand wheel (17) is rotated reversely, the locking hand wheel (17) drives the connecting screw (18) to rotate reversely to release the compression of the flat key (19) on the compression surface b, the flat key (19) is arranged in the key groove (20) of the screw rod nut sleeve, the flat key (19) can move up and down along with the screw rod nut sleeve (14) and limit the rotation of the screw rod nut sleeve along the horizontal direction, so that the screw rod nut sleeve cannot rotate relative to the shell (1) and can only move up and down, the screw rod nut sleeve can drive the moving platform to move, and the locking mechanism can release the locking of the manual loading fine-adjustment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088090.4A CN112730138B (en) | 2021-01-22 | Manual loading fine adjustment device and method for metering verification of material testing machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110088090.4A CN112730138B (en) | 2021-01-22 | Manual loading fine adjustment device and method for metering verification of material testing machine |
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| Publication Number | Publication Date |
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| CN112730138A true CN112730138A (en) | 2021-04-30 |
| CN112730138B CN112730138B (en) | 2024-05-24 |
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| CN114421088A (en) * | 2022-01-21 | 2022-04-29 | 桂林航天工业学院 | Power battery module and electric power safety protection system |
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