CN117451255A - Device for measuring three-dimensional gravity center and moment with high precision - Google Patents

Device for measuring three-dimensional gravity center and moment with high precision Download PDF

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Publication number
CN117451255A
CN117451255A CN202311216273.5A CN202311216273A CN117451255A CN 117451255 A CN117451255 A CN 117451255A CN 202311216273 A CN202311216273 A CN 202311216273A CN 117451255 A CN117451255 A CN 117451255A
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CN
China
Prior art keywords
measuring
block
top surface
gravity center
shaped groove
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311216273.5A
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Chinese (zh)
Inventor
滕树新
王进
王成富
邹维平
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Wuxi Turbine Blade Co Ltd
Original Assignee
Wuxi Turbine Blade Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Wuxi Turbine Blade Co Ltd filed Critical Wuxi Turbine Blade Co Ltd
Priority to CN202311216273.5A priority Critical patent/CN117451255A/en
Publication of CN117451255A publication Critical patent/CN117451255A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/12—Static balancing; Determining position of centre of gravity
    • G01M1/122—Determining position of centre of gravity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/02—Details of balancing machines or devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/02—Details of balancing machines or devices
    • G01M1/04—Adaptation of bearing support assemblies for receiving the body to be tested
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M1/00—Testing static or dynamic balance of machines or structures
    • G01M1/14—Determining unbalance
    • G01M1/16—Determining unbalance by oscillating or rotating the body to be tested

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The invention provides a device for measuring three-dimensional moment and gravity center position with high precision, which comprises a front support and a rear support arranged on a workbench, wherein a measuring table is arranged above the front support and the rear support, a first positioning block, a knife edge positioning seat and a limiting block are arranged on the measuring table, and the first positioning block, the knife edge positioning seat and the limiting block are used for limiting a workpiece to be measured in the horizontal direction; a first T-shaped groove is arranged on the top surface of the measuring table, and the knife edge positioning seat is arranged in the first T-shaped groove in a sliding way; a second T-shaped groove is arranged on the top surface of the measuring table, and a limiting block is arranged in the second T-shaped groove in a sliding manner; the front pillar is equipped with a pressure sensor. According to the invention, by arranging the measuring table, the first positioning block, the knife edge positioning seat and the limiting block, the accurate positioning of the measured workpiece is realized rapidly, and the measuring direction is ensured to be parallel to the measuring axis of the measured workpiece, so that the accuracy and the stability of data reading are ensured.

Description

Device for measuring three-dimensional gravity center and moment with high precision
Technical Field
The invention relates to the technical field of gravity center and moment detection, in particular to a device for measuring three-dimensional moment and gravity center position with high precision.
Background
It is well known that even with the most advanced machine tools in the world, individual parts produced will always have manufacturing variations.
The blades with different manufacturing deviations are arranged on the same rotor, the rotor drives the blades to rotate at a high speed to generate unbalance, if the unbalance is too large, the load of the whole unit is increased and vibrated, energy loss or cracks are generated until the blades are broken due to vibration, and the service life of the whole unit is greatly shortened, so that dynamic balance tests are required to be carried out on all units after the units are assembled. Before dynamic balance test, the blades of the unit are required to be sequenced so as to determine a blade installation sequence number meeting the requirement, so that the minimum unbalance is obtained, and therefore, the accuracy of the gravity center data and the moment weighing data of the product required by sequencing is an important parameter for ensuring good balance of each stage of blades, namely obtaining a well-balanced rotor.
Taking a blade as an example, a past moment weighing method is shown in fig. 7 and 8 of the drawings of the specification, the blade is placed on 2 fulcrum devices with knife edges, one fulcrum is set as a fixed fulcrum, the other fulcrum is an electronic scale device with a pressure sensor to display a counter force value F at the top of the blade, the weight Gp of the blade is obtained by weighing the electronic scale, the center distance L of the 2 fulcrums is measured, the radius Rref of the rotor is determined according to a pattern, and the radial moment value of the measured workpiece relative to the center of the rotor is obtained through a moment calculation formula M=gp+Rref+F. In order to solve the consistency of the measurement positions of a batch of blades, limiting blocks are added at the blade root bottom end plane or the intermediate body plane of the blades so as to reduce the fluctuation of measurement data. However, the data obtained by the measurement using the above measurement method is not accurate enough, and the applicants have studied and analyzed the data to find the cause of the inaccuracy of the data has the following points:
1. the generated friction force between the radial limiting block and the measured workpiece does not belong to the gravity category of the measured workpiece, the accuracy of the counter force F value can be influenced, the magnitude of the friction force is not a fixed value, and the friction force is changed along with the bonding tightness between the radial limiting block and the measured workpiece, so that the friction force is an uncontrollable factor;
2. the pivot with the pressure sensor device is deformed under the action of external force, so that the radial shaft of the blade is not in a horizontal state any more, the contact point of the blade edge and the blade, namely the stress point, is not the highest point of the pivot, the accuracy of the L value is affected, and the larger the counter force F value is, the larger the error of the L value is;
3. the workpiece is limited only in the Y direction and the Z direction during detection, the degree of freedom in the X direction is not limited, when an operator prevents the workpiece from being placed, the workpiece deflects in the XZ plane to influence the accuracy of an L value, and the uncertainty of the placement state of the workpiece to be detected can cause repeated operation of the same workpiece and unstable measurement data;
4. the manufacturing tolerance requirement of the part of the radial limiting block for positioning the workpiece is not high, the part is not an assembly reference surface of the workpiece, the design reference of the workpiece is inconsistent with the positioning reference used for detection, and the fluctuation deviation generated by manufacturing influences the precision of the L value;
5. the old measurement mode cannot measure the comprehensive deviation of the system and cannot check and correct the deviation value of the system; even if the guide rail slide blocks are additionally arranged under 2 fulcrum devices.
Therefore, how to obtain more accurate gravity center data and moment weighing data becomes a problem to be solved by the person skilled in the art.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a device for measuring three-dimensional moment and gravity center position with high precision, which comprises a workbench, wherein a front support column and a rear support column are arranged on the workbench, a measuring table can be detachably arranged above the front support column and the rear support column, a first positioning block and a knife edge positioning seat are respectively arranged at two opposite ends of the top surface of the measuring table along the Z direction, a limiting block is arranged at one side of the top surface of the measuring table along the X direction, and the first positioning block, the knife edge positioning seat and the limiting block are used for limiting a workpiece to be measured in the horizontal direction;
the top surface of the measuring table is provided with a first T-shaped groove extending along the Z direction, and the lower end of the knife edge positioning seat is arranged in the first T-shaped groove in a sliding way; the top surface of the measuring table is provided with a second T-shaped groove extending along the X direction, and the lower end of the limiting block is arranged in the second T-shaped groove in a sliding way;
the front pillar is detachably provided with a pressure sensor, the top surface of the workbench is provided with a first digital display device, the first digital display device is electrically connected with the pressure sensor, and the first digital display device is used for reading data measured by the pressure sensor.
Preferably, a third T-shaped groove extending in the Z direction is mounted on the bottom surface of the measuring table, the upper end of the rear pillar is slidably disposed in the third T-shaped groove, an L-shaped groove extending in the Z direction is designed on the bottom surface of the measuring table, and the upper end of the front pillar is slidably disposed in the L-shaped groove.
As optimization, the first positioning block is L-shaped, and a compression block and a second positioning block are respectively arranged on two opposite sides of the first positioning block.
As an optimization, a first guide rail along the Z direction is arranged on the top surface of the workbench, and the lower ends of the front support column and the rear support column are arranged on the first guide rail in a sliding mode through sliding blocks.
As optimization, a grating ruler is arranged on the top surface of the workbench and positioned at the lateral position of the measuring table, and the grating ruler extends along the Z direction; the second digital display device is arranged on the top surface of the workbench and is electrically connected with the grating ruler, and the second digital display device is used for reading data measured by the grating ruler.
As an optimization, a Z-direction detection device is arranged on the top surface of the workbench and positioned at the lateral position of the grating ruler, and the Z-direction detection device is arranged on a second guide rail along the Z direction in a sliding manner.
Preferably, an X-direction detecting device is arranged on the top surface of the workbench at the position of the measuring bench end, and the X-direction detecting device is arranged on a third guide rail along the X-direction in a sliding manner.
As optimization, the knife edge positioning seat comprises a T-shaped block and an additional installation block, wherein the T-shaped block is arranged in the first T-shaped groove in a sliding mode, the bottom surface of the additional installation block is integrally connected with the T-shaped block, the top surface of the additional installation block is provided with an additional installation groove along the X direction, and the additional installation groove is detachably provided with a knife edge ruler matched with a workpiece to be detected.
As optimization, the first positioning block is L-shaped, and an assembly block is detachably arranged on the first positioning block, and the shape of the assembly block is matched with the assembly end of the workpiece to be tested.
As optimization, the limiting block is L-shaped.
Compared with the prior art, the invention has the following beneficial effects:
(1) The first positioning block, the slidable knife edge positioning seat and the limiting block are designed to jointly construct a positioning and pressing mechanism for 3 directions of a measured product, and the mounting block matched with the assembly reference of the workpiece to be measured can be quickly replaced on the first positioning block, so that the measurement positioning state and the assembly positioning state of the workpiece to be measured are consistent, and the accuracy of measurement data is improved; the sliding knife edge positioning seat is provided with a replaceable knife edge ruler for supporting another point of the workpiece to be measured, so that the workpiece to be measured is ensured to be in a horizontal state; the limiting blocks on the side face limit the deflection of the workpiece to be measured on the XZ plane. Different from the old measuring mode, the positioning and clamping force used for limiting the degree of freedom of the measured workpiece in the X, Y, Z directions does not influence the measured data, so that the positioning accuracy and the positioning stability of the measured state of the workpiece to be measured are improved, and the fluctuation range of repeated measured data of the same product is greatly reduced;
(2) The detachable measuring table is designed, the measuring tables with different structural forms can be replaced according to the characteristics of the workpiece to be measured, the length dimension of the measuring table is also changed according to the length requirement of the workpiece to be measured, the application range of the measuring table is wide, the workpiece to be measured can be a blade or a non-blade product, the product as small as a matchbox is a product as large as a product as several times of the length of the measuring table device, as long as the gravity center position of the workpiece to be measured and the total weight of the measuring table falls between the front upright post and the rear upright post, and the front upright post and the rear upright post can slide and be locked at any position on the guide rail, so that the measuring range is greatly widened;
(3) The bottom surface of the measuring table is provided with a third T-shaped groove, the rear upright post can move along the Z direction of the measuring table, the position of the rear upright post is adjusted, the rear upright post bears 90% -95% of the gravity of the whole measuring table, and the front upright post bears only about 5% of the gravity, and as the bearing of the front upright post is small, a pressure sensor with a smaller range and higher precision can be selected to read data, so that the precision of the measured data is improved; on the other hand, the duty ratio of the counterforce F value is reduced, and the influence of fluctuation deviation of the counterforce F value on the measurement accuracy is reduced;
(4) Detecting devices at the second guide rail and the third guide rail are designed to detect and adjust straightness deviation of the measuring table in the Z direction and the X direction; the error of the measuring table in the Y direction is checked and adjusted by placing the level gauge on the measuring table, the whole measuring table device is ensured to be positioned at the correct position by the measures, and the measuring direction of the system is ensured to be parallel to the measuring direction required by the measured workpiece, so that the accuracy of data reading of the system is ensured, the consistency of repeated measuring states of the same product is ensured by the operation, and the stability of the measured data is effectively improved;
(5) The device can measure the radial moment and the gravity center position in the Z direction, and can also measure the axial moment and the gravity center position in other directions such as the X direction, the Y direction and the Y direction, thereby solving the problem of measuring the three-dimensional gravity center moment required by the composite material product, which is a function not possessed by the old measurement mode;
(6) The device can check the comprehensive deviation of the system, and the method is to directly put an object with a regular geometric shape measured by a country, such as a standard length block gauge, on a measuring table for measurement, and compare the measured gravity center coordinate value with the actual gravity center coordinate value of the object, wherein the deviation value is the comprehensive deviation of the system, can be used as a basis for checking, adjusting and correcting the system, and further improves the measurement accuracy of the system, which is also a function not possessed by the old measurement mode.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described. Throughout the drawings, the elements or portions are not necessarily drawn to actual scale.
FIG. 1 is a schematic side view of the apparatus for measuring three-dimensional moment and center of gravity with high accuracy according to the present invention.
Fig. 2 is a top view of the device for measuring three-dimensional moment and gravity center position with high accuracy according to the present invention.
Fig. 3 is a diagram of the use of the measuring station of the invention in measuring the center of gravity and the radial moment of a turbine blade of a gas turbine.
FIG. 4 is a schematic illustration of the use of the measuring station of the present invention in measuring the center of gravity and radial moment of an 80mm long turbine product.
FIG. 5 is a schematic illustration of the use of the measuring station of the present invention in measuring the center of gravity and circumferential moment of a turbine blade of a gas turbine.
FIG. 6 is a schematic illustration of the use of the measuring station of the present invention in measuring the center of gravity and axial moment of a turbine blade of a gas turbine.
Fig. 7 is a schematic diagram of conventional old gravity moment measurement with the bottom surface of the blade root as a limit.
FIG. 8 is a schematic diagram of a conventional old gravity moment measurement with the blade intermediate plane as a limit.
Detailed Description
Embodiments of the technical scheme of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Examples: as shown in fig. 1-6, a device for measuring three-dimensional moment and gravity center position with high precision comprises a workbench 1, wherein a front support column 2 and a rear support column 3 are arranged on the workbench 1, a measuring table 4 is detachably arranged above the front support column 2 and the rear support column 3, a first positioning block 41 and a knife edge positioning seat 42 are respectively arranged at two opposite ends of the top surface of the measuring table 4 along the Z direction, a limiting block 43 is arranged at one side of the top surface of the measuring table 4 along the X direction, and the limiting block 43 is used for limiting a workpiece to be measured in the horizontal direction (namely an xZ plane) in a limiting manner. In the present application, the length direction of the measuring table is defined as the Z direction, the width direction of the measuring table is defined as the X direction, and the height direction of the measuring table is defined as the Y direction.
In implementation, the knife edge positioning seat 42 and the limiting block 43 can be used simultaneously or one of them can be selected for use according to the requirement.
Wherein, a first T-shaped groove 44 extending along the Z direction is arranged on the top surface of the measuring table 4, and the lower end of the knife edge positioning seat 42 is arranged in the first T-shaped groove 44 in a sliding way; a second T-shaped groove 45 extending in the X-direction is provided on the top surface of the measuring table 4, and the lower end of the stopper 43 is slidably disposed in the second T-shaped groove 45.
Therefore, the measured workpiece is arranged on the measuring table capable of realizing accurate positioning, the consistency of repeated installation states of the same product is ensured, namely, the consistency of the measurement states is ensured, and a foundation is laid for the consistency of the subsequent measurement results.
In the implementation process, the rear support column is contacted with the bottom of the measuring table by using the high-precision unitized bearing component, so that the radial movement gap generated by the external force impact on the measuring table in the process of placing the measured workpiece can be greatly reduced.
When the pressure sensor of the front pillar is implemented, the pressure sensor is a high-precision pressure sensor, and the pressure sensors with different measuring ranges can be conveniently replaced according to the weight of a measured workpiece.
The front pillar 2 is detachably provided with a pressure sensor 21, the top surface of the workbench 1 is provided with a first digital display device 11, the first digital display device 11 is electrically connected with the pressure sensor 21, and the first digital display device 11 is used for reading the counter force F value data measured by the pressure sensor 21.
In one embodiment of the present application, a third T-shaped groove 46 extending along the Z-direction is mounted on the bottom surface of the measuring table 4, and the upper end of the rear pillar 3 is slidably disposed in the third T-shaped groove 46; an L-shaped groove 46 extending in the Z direction is provided on the bottom surface of the measuring table 4, and the upper end of the front pillar 2 is slidably disposed in the L-shaped groove 46.
In one embodiment of the present application, the first positioning block 41 is L-shaped, and the pressing block 411 and the second positioning block 412 are respectively installed on two opposite sides of the first positioning block 41.
In one embodiment of the present application, a first guide rail 12 along the Z direction is disposed on the top surface of the workbench 1, the lower ends of the front support column 2 and the rear support column 3 are slidably disposed on the first guide rail 12 through a slider 13, and the positions of the front support column 2 and the rear support column 3 can be moved and locked on the first guide rail 12.
In practice, the first guide rail 12 may be two parallel to each other.
Therefore, the distance between the front support column and the rear support column can be adjusted according to different lengths of the workpiece to be measured, so that the center of gravity of the workpiece to be measured is located between the front support column and the rear support column.
In one embodiment of the application, a grating ruler 5 is arranged on the top surface of the workbench 1 at the lateral side of the measuring table 4, and the grating ruler 5 is arranged in a Z-direction extending way; a second digital display device 14 is mounted on the top surface of the workbench 1, the second digital display device 14 is electrically connected with the grating ruler 5, and the second digital display device 14 is used for reading the distance L between the supporting points of the front pillar 2 and the rear pillar 3 measured by the grating ruler 5.
In one embodiment of the present application, a Z-direction detecting device 15 is provided on the top surface of the table 1 at a side of the grating ruler 5, and the Z-direction detecting device 15 is slidably disposed on a second rail 16 along the Z-direction.
In this way, the Z-direction detecting device is used to check whether the side surface of the measuring table is parallel to the moving direction of the guide rail, so as to ensure that the Z-axis of the workpiece to be measured is parallel to the detecting direction.
In one embodiment of the application, an X-direction detecting device 17 is provided on the top surface of the table 1 at the end of the measuring table 4, and the X-direction detecting device 17 is slidably disposed on a third rail 18 along the X-direction.
Thus, the X-direction detection device is used for checking whether the Z-direction displacement gap exists in the detection process of the measuring table.
In one embodiment of the present application, the knife edge positioning seat 42 includes a T-shaped block 421 and an additional mounting block 422, where the T-shaped block 421 is slidably disposed in the first T-shaped slot 44, the bottom surface of the additional mounting block 422 is integrally connected with the T-shaped block 421, and an additional mounting slot along the X-direction is provided on the top surface of the additional mounting block 422, and the additional mounting slot is detachably provided with a knife edge ruler 423 matched with the workpiece to be tested, where the knife edge ruler 423 is applied to one end of the workpiece to be tested and plays a supporting role.
Therefore, the workpiece to be tested can be further limited by additionally installing the limiting plate.
In one embodiment of the present application, the first positioning block 41 is L-shaped, and an assembling block 413 matched with the assembling end of the workpiece to be measured is detachably mounted on the first positioning block 41.
In one embodiment of the present application, the limiting block 43 is L-shaped, and limits the workpiece to be tested in the X direction.
Before the device of the application is adopted to measure, the level gauge can be placed on the side of the measuring table, meanwhile, a measured workpiece is placed on the measuring table, whether the side of the measuring table is horizontal or not is checked, and if the side of the measuring table is not horizontal, the height of the front support column or the rear support column is required to be adjusted until the side of the measuring table is horizontal, so that the XZ plane of the measured workpiece is ensured to be measured in a horizontal state.
Before the device is adopted to measure, the measuring standard length block gauge is directly placed on a measuring table, the comprehensive deviation of the system in the current state is measured, and the product can be measured only when the comprehensive deviation value is within the specified allowable error range. Specifically, it is necessary to measure the value of the system reaction force Fj at which the workpiece to be measured is not placed and the value of the system reaction force Fa after the workpiece to be measured is placed, thereby obtaining the moment value and the center of gravity position of the workpiece to be measured.
The device can measure the moment value and the gravity center position in the Z direction, can measure the moment value and the gravity center position in other directions such as the X or Y direction, and can be applied to the problem of measuring the three-dimensional moment and the gravity center required by composite material products.
The electrical components in the device can be connected with a computer through the data line, automatically read data and run programs for sorting, the stability and reliability of a measuring system are guaranteed, the measuring data are accurate and quick, and the sorting requirement of the blades is met.
The device comprehensively improves the precision, reliability and stability of moment weighing detection data of the blade relative to an old weighing system. The accurate positioning of blade measurement clamping is realized, and the same blade has good repeated measurement consistency and accurate measurement data. Through testing, the same product is repeatedly measured for a plurality of times, different people measure the same product, and the same product is measured in different time periods, and the fluctuation range of moment data is controlled within five parts per million.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.

Claims (10)

1. The device for measuring the three-dimensional moment and the gravity center position with high precision is characterized by comprising a workbench, wherein a front support column and a rear support column are arranged on the workbench, a measuring table is detachably arranged above the front support column and the rear support column, a first positioning block and a knife edge positioning seat are respectively arranged at two opposite ends of the top surface of the measuring table along the Z direction, a limiting block is arranged at one side of the top surface of the measuring table along the X direction, and the first positioning block, the knife edge positioning seat and the limiting block are used for limiting a workpiece to be measured in the horizontal direction;
the top surface of the measuring table is provided with a first T-shaped groove extending along the Z direction, and the lower end of the knife edge positioning seat is arranged in the first T-shaped groove in a sliding way; the top surface of the measuring table is provided with a second T-shaped groove extending along the X direction, and the lower end of the limiting block is arranged in the second T-shaped groove in a sliding way;
the front pillar is detachably provided with a pressure sensor, the top surface of the workbench is provided with a first digital display device, the first digital display device is electrically connected with the pressure sensor, and the first digital display device is used for reading data measured by the pressure sensor.
2. The device for measuring three-dimensional moment and gravity center position with high precision according to claim 1, wherein a third T-shaped groove extending along the Z-direction is installed on the bottom surface of the measuring table, the upper end of the rear pillar is slidably disposed in the third T-shaped groove, an L-shaped groove extending along the Z-direction is installed on the bottom surface of the measuring table, and the upper end of the front pillar is slidably disposed in the L-shaped groove.
3. The device for measuring three-dimensional moment and gravity center position with high precision according to claim 1, wherein the first positioning block is L-shaped, and a compression block and a second positioning block are respectively installed at opposite sides of the first positioning block.
4. The device for measuring three-dimensional moment and gravity center position with high precision according to claim 1, wherein a first guide rail along the Z-direction is provided on the top surface of the table, and the lower ends of the front pillar and the rear pillar are slidably disposed on the first guide rail by means of a slider.
5. The device for measuring the three-dimensional moment and the gravity center position with high precision according to claim 1, wherein a grating ruler is arranged on the top surface of the workbench and positioned at the lateral direction of the measuring bench, and the grating ruler extends along the Z direction; the second digital display device is arranged on the top surface of the workbench and is electrically connected with the grating ruler, and the second digital display device is used for reading data measured by the grating ruler.
6. The device for measuring three-dimensional moment and gravity center position with high precision according to claim 5, wherein a Z-direction detecting device is arranged on the top surface of the workbench at the lateral position of the grating ruler, and the Z-direction detecting device is arranged on the second guide rail along the Z-direction in a sliding manner.
7. The device for measuring three-dimensional moment and gravity center position with high precision according to claim 1, wherein an X-direction detecting device is arranged on the top surface of the workbench at the end direction of the measuring bench, and the X-direction detecting device is arranged on a third guide rail along the X-direction in a sliding manner.
8. The device for measuring the three-dimensional moment and the gravity center position with high precision according to claim 1, wherein the knife edge positioning seat comprises a T-shaped block and an additional block, the T-shaped block is arranged in the first T-shaped groove in a sliding mode, the bottom surface of the additional block is integrally connected with the T-shaped block, the top surface of the additional block is provided with an additional groove along the X direction, and the additional groove is detachably provided with a knife edge ruler matched with a workpiece to be measured.
9. The device for measuring the three-dimensional moment and the gravity center position with high precision according to claim 1, wherein the first positioning block is L-shaped, and an assembling block is detachably arranged on the first positioning block, and the shape of the assembling block is matched with the assembling end of the workpiece to be measured.
10. The device for measuring the three-dimensional moment and the gravity center position with high precision according to claim 1, wherein the limiting block is L-shaped.
CN202311216273.5A 2023-09-20 2023-09-20 Device for measuring three-dimensional gravity center and moment with high precision Pending CN117451255A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311216273.5A CN117451255A (en) 2023-09-20 2023-09-20 Device for measuring three-dimensional gravity center and moment with high precision

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311216273.5A CN117451255A (en) 2023-09-20 2023-09-20 Device for measuring three-dimensional gravity center and moment with high precision

Publications (1)

Publication Number Publication Date
CN117451255A true CN117451255A (en) 2024-01-26

Family

ID=89584406

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311216273.5A Pending CN117451255A (en) 2023-09-20 2023-09-20 Device for measuring three-dimensional gravity center and moment with high precision

Country Status (1)

Country Link
CN (1) CN117451255A (en)

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