CN210269019U - Measuring structure for center deviation between center of gravity of rotary table and center of rotary shaft - Google Patents
Measuring structure for center deviation between center of gravity of rotary table and center of rotary shaft Download PDFInfo
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- CN210269019U CN210269019U CN201921070780.1U CN201921070780U CN210269019U CN 210269019 U CN210269019 U CN 210269019U CN 201921070780 U CN201921070780 U CN 201921070780U CN 210269019 U CN210269019 U CN 210269019U
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Abstract
The patent discloses a revolving stage focus and pivot central deviation measurement structure. The measuring structure comprises a measuring main support, a first supporting angle, a second supporting angle, a third supporting angle, a first electronic scale, a second electronic scale, a third electronic scale, a first horizontal ruler and a second horizontal ruler; the first supporting angle, the second supporting angle and the third supporting angle are respectively connected with the main measuring support through threads, the first supporting angle is placed at the central position of the first measuring surface of the electronic scale, the second supporting angle is placed at the central position of the second measuring surface of the electronic scale, and the third supporting angle is placed at the central position of the third measuring surface of the electronic scale. This patent is rational in infrastructure, simple, compact, calculates revolving stage focus and pivot center deflection through supporting angle mass measurement difference, and measuring method simple accurate is with low costs, and convenient to use is suitable for various one-dimensional revolving stages, especially the huge revolving stage of volume and quality to use.
Description
Technical Field
The patent relates to a revolving stage focus and pivot central deviation measure structure, concretely relates to simple measurement structure of one-dimensional revolving stage focus and pivot central line deviation.
Background
When the equipment works and rotates, in order to ensure the stability of movement, the deviation between the gravity center and the center of the rotating shaft needs to be small as much as possible, so that the deviation between the gravity center of the rotating table and the center of the rotating shaft needs to be measured in order to verify the stability of the rotating table during rotation. At present, special precise instrument equipment is used for measuring the gravity center of an object, but due to different structural forms of the one-dimensional rotary tables and large differences of the volume and the mass, the special instrument equipment is used for measuring the gravity center of the object, various special tools need to be designed and processed, time and labor are consumed, the cost is high, and the special instrument equipment cannot be used for some rotary tables with large volume and mass.
Disclosure of Invention
The utility model aims to overcome current shortcoming, provides a simple structure, with low costs one-dimensional revolving stage focus and pivot central line offset measurement structure, is applicable to the one-dimensional revolving stage of various structural style, is fit for ripe market more and uses, realizes revolving stage focus and pivot central line offset rapid survey.
In order to achieve the purpose, the following technical scheme is adopted in the patent:
a measuring structure for measuring the deviation between the center of gravity of a turntable and the center of a rotating shaft comprises a main support 1, a first supporting angle 2, a second supporting angle 3, a third supporting angle 4, a first electronic scale 5, a second electronic scale 6, a third electronic scale 7, a first horizontal ruler 8 and a second horizontal ruler 9; the method is characterized in that:
the measuring main support 1 comprises a support disc 1-1, a support strip I1-2, a support strip II 1-3 and a support strip III 1-4; the structure is as follows: the supporting disc 1-1 is a disc structure made of stainless steel materials, the thickness of the supporting disc is 10-30 mm, and the diameter of the supporting disc is 100 mm larger than the mounting surface of the turntable to be measured; the first support strip 1-2, the second support strip 1-3 and the third support strip 1-4 are of the same structure and materials, and are cut by channel aluminum or channel steel, and one end of the channel aluminum or channel steel is chamfered and is provided with a threaded through hole; the first axis 1-5 is an axial geometric center line of the supporting disc 1-1, the first supporting strip 1-2, the second supporting strip 1-3 and the third supporting strip 1-4 are respectively fixedly connected with the supporting disc 1-1 through welding or screws, the non-chamfered end faces of the first supporting strip 1-2, the second supporting strip 1-3 and the third supporting strip 1-4 are equal to the first axis 1-5 in distance, the first supporting strip 1-2, the second supporting strip 1-3 and the third supporting strip 1-4 are circumferentially distributed on a circular mounting surface of the bottom surface of the supporting disc 1-1 in trisection around the first axis 1-5, a projection surface 1-6 is an upper surface of the supporting disc 1-1, and the second axis 1-7 is a center line of the length direction of the first supporting strip 1-2 on the projection surface 1-6, the third axis 1-8 is a central line of the second support strip 1-3 in the length direction on the projection surface 1-6, the fourth axis 1-9 is a central line of the third support strip 1-4 in the length direction on the projection surface 1-6, and included angles of the second axis 1-7 and the third axis 1-8, the third axis 1-8 and the fourth axis 1-9, and the second axis 1-7 and the fourth axis 1-9 are all 120 degrees.
The first supporting angle 2, the second supporting angle 3 and the third supporting angle 4 are of the same structure and materials, the upper end of the first supporting angle is a threaded rod, the lower end of the first supporting angle is a disc support, and the threaded rod and the disc support are connected by a universal joint; a first supporting angle 2 threaded rod is in threaded connection with a first supporting strip 1-2 threaded through hole of the main measuring support 1, the relative position of the first supporting angle 2 threaded rod and the first supporting strip 1-2 can be axially adjusted through threads and fixed through nuts, and the first supporting angle 2 is placed in the center of a first measuring surface 5 of the electronic scale; a second supporting angle 3 threaded rod is in threaded connection with a second supporting strip 1-3 threaded through hole of the main measuring support 1, the relative position of the second supporting angle 3 threaded rod and the second supporting strip 1-3 can be axially adjusted through threads and fixed through nuts, and the second supporting angle 3 is placed in the center of a measuring surface of the second electronic scale 6; a threaded rod of a supporting angle III 4 is in threaded connection with threaded through holes of support bars III 1-4 of the main measurement support 1, the relative positions of the threaded rod of the supporting angle III 4 and the support bars III 1-4 can be axially adjusted through threads and fixed through nuts, and the supporting angle III 4 is placed in the center of a measurement surface of the electronic scale III 7; the first level ruler 8 is placed at the edge position of the upper surface of the supporting disc 1-1 of the main support 1, the second level ruler 9 is placed at the edge position of the upper surface of the supporting disc 1-1 of the main support 1, and the first level ruler 8 and the second level ruler 9 are placed in a mutually perpendicular state.
The patent also provides a measuring method of the measuring structure of the center of gravity and the center deviation of the rotating shaft of the rotating platform, the rotating platform 10 is the rotating platform to be measured, the axis five 11 is the central line of the rotating shaft of the rotating platform 10, the center one 12 is the rotating platform 10 and the main support 1 for measurement, the support angle I2, the support angle II 3 and the support angle III 4 are integrally barycenter, an axis six 13 is a threaded rod axial central line of the support angle I2, a projection point I14 is a projection point projected on the axis II 1-7 after a space coordinate of the center I12 is projected on the projection plane 1-6 as a plane coordinate, a projection point II 15 is a projection point projected on the axis III 1-8 after a space coordinate of the center I12 is projected on the projection plane 1-6 as a plane coordinate, and a projection point III 16 is a projection point projected on the axis IV 1-9 after a space coordinate of the center I12 is projected on the projection plane 1-6 as a plane coordinate; the method for measuring the center of gravity deviation of the turntable comprises the following steps:
1) under the condition that a rotary table to be measured is not placed, the axial relative positions of the supporting angle I2 and the supporting strip I1-2 of the measuring main support 1, the axial relative positions of the supporting angle II 3 and the supporting strip II 1-3 of the measuring main support 1, and the axial relative positions of the supporting angle III 4 and the supporting strip III 1-4 of the measuring main support 1 are respectively adjusted axially and fixed through nuts, so that the measuring readings of the level ruler I8 and the level ruler II 9 in two vertical directions are displayed in a horizontal state;
2) removing the first horizontal ruler 8 and the second horizontal ruler 9, fixedly installing a plurality of counterweight strip plates made of stainless steel materials at the bottom of a supporting disc 1-1 of the main measurement support 1 through screws, balancing the main measurement support 1 to ensure that the weighing readings of the first electronic scale 5, the second electronic scale 6 and the third electronic scale 7 are the same at the moment, and recording the sum of the readings of the first electronic scale 5, the second electronic scale 6 and the third electronic scale 7, namely the mass sum M2 of the main measurement support 1, the first supporting angle 2, the second supporting angle 3 and the third supporting angle 4;
3) the mass M3 of the turntable to be measured, namely the turntable 10, is measured and recorded, and the following are provided:
M1＝M2+M3 (1)
wherein M1 is the mass sum of the rotary table 10, the measurement main support 1, the first supporting angle 2, the second supporting angle 3 and the third supporting angle 4;
4) installing a rotary table to be measured, wherein the rotary table 10 is fixedly installed with a supporting disc 1-1 of the measuring main support 1 through a screw, so that an axis five 11 of the rotary table 10 is superposed with an axis one 1-5 of the measuring main support 1;
5) recording the weighing reading of the electronic scale I5, measuring and recording the distance between the axis six 13 of the supporting angle I2 and the axis five 11 of the rotary table 10, and then:
(M4-M1/3)·L1＝M1·L2 (2)
wherein M4 is the weighing reading of the electronic scale I5, L1 is the distance between the axis six 13 of the supporting angle I2 and the axis five 11 of the rotary table 10, and L2 is the distance between the projection point I14 and the axis five 11 of the rotary table 10;
the L2 value can be obtained by the calculation of formula (2);
similarly, the distance between the second projection point 15 and the fifth axis 11 of the turntable 10 can be obtained from the weighing reading of the second electronic scale 6 and the distance between the axial center line of the threaded rod of the second support angle 3 and the fifth axis 11 of the turntable 10, the distance between the third projection point 16 and the fifth axis 11 of the turntable 10 can be obtained from the weighing reading of the third electronic scale 7 and the distance between the axial center line of the threaded rod of the third support angle 4 and the fifth axis 11 of the turntable 10, and the distance between the first gravity center 12 and the fifth axis 11 of the turntable 10, namely the deviation of the center of gravity of the turntable 10, the measurement main support 1, the first support angle 2, the second support angle 3 and the third support angle 4 from the center line of the rotating shaft, can be obtained by performing plane geometric synthesis on the projection plane 1-6 with the first projection point 14, the second projection point 15 and the third projection point 16;
6) this time is:
M1·L3＝M3·L4 (3)
wherein, L3 is the distance between the first gravity center 12 and the axis five 11 of the turntable 10, and L4 is the distance between the gravity center of the turntable 10 and the axis five 11 of the turntable 10;
the value of L4 is calculated by the formula (3), that is, the deviation between the center of gravity of the turntable 10 and the center of the rotating shaft is measured.
This patent has following advantage: this patent is rational in infrastructure, simple, compact, and the reliability is high, and it is easy to make, and the simple installation calculates revolving stage focus and pivot center deflection through propping angle mass measurement difference, and measuring method simple accurate is with low costs, and convenient to use is suitable for various one-dimensional revolving stages, especially the huge revolving stage of volume and quality to use.
Drawings
FIG. 1 is a schematic diagram of the general structure of one embodiment of the present patent.
Fig. 2 is a bottom isometric view of the measurement main support 1 of one embodiment of this patent.
Fig. 3 is a top view of the measuring main support 1 of an embodiment of the patent.
Fig. 4 is a front view of the embodiment of fig. 1 in which turret measurements are made.
Fig. 5 is a top view of fig. 4.
Detailed Description
A preferred embodiment of this patent is given below in conjunction with the accompanying drawings, which mainly illustrate the features of this patent in further detail, and not to limit the scope of this patent:
referring to fig. 1, the structure for measuring the deviation between the center of gravity of the turntable and the center of the rotating shaft comprises a main support 1, a first supporting angle 2, a second supporting angle 3, a third supporting angle 4, a first electronic scale 5, a second electronic scale 6, a third electronic scale 7, a first horizontal ruler 8 and a second horizontal ruler 9; the method is characterized in that:
referring to fig. 2 and 3, the main measuring support 1 comprises a support disc 1-1, a support strip 1-2, a support strip two 1-3 and a support strip three 1-4; the structure is as follows: the supporting disc 1-1 is a disc structure made of stainless steel materials, the thickness is 10 mm, and the diameter is 600 mm; the first support strip 1-2, the second support strip 1-3 and the third support strip 1-4 are of the same structure and materials, are all cut by adopting U-shaped groove aluminum, and one end of each support strip is chamfered and is provided with a threaded through hole; the first axis 1-5 is an axial geometric center line of the support disc 1-1, the first support strip 1-2, the second support strip 1-3 and the third support strip 1-4 are fixedly connected with the support disc 1-1 through welding respectively, the non-chamfered end faces of the first support strip 1-2, the second support strip 1-3 and the third support strip 1-4 are equal to and 100 mm away from the first axis 1-5, the first support strip 1-2, the second support strip 1-3 and the third support strip 1-4 are circumferentially distributed on a circular mounting surface of the bottom surface of the support disc 1-1 in a trisection mode around the first axis 1-5, the projection surface 1-6 is an upper surface of the support disc 1-1, the second axis 1-7 is a center line of the first support strip 1-2 in the length direction on the projection surface 1-6, and the third axis 1-8 is a middle of the second support strip 1-3 in the The axis line four 1-9 is the central line of the length direction of the support bar three 1-4 on the projection plane 1-6, the included angles of the axis line two 1-7 and the axis line three 1-8, the axis line three 1-8 and the axis line four 1-9, and the included angles of the axis line two 1-7 and the axis line four 1-9 are all 120 degrees.
The first supporting angle 2, the second supporting angle 3 and the third supporting angle 4 are of the same structure and materials, the upper end of the first supporting angle is a threaded rod, the lower end of the first supporting angle is a disc support, and the threaded rod and the disc support are connected by a universal joint; the threaded rod of the supporting angle I2 is in threaded connection with a threaded through hole 1-2 of a supporting bar I of the main measurement support 1, the relative position of the threaded rod of the supporting angle I2 and the supporting bar I1-2 can be axially adjusted through threads and fixed through nuts, and the supporting angle I2 is placed in the center of a measuring surface of the electronic scale I5; a threaded rod of a supporting angle II 3 is in threaded connection with a threaded through hole of a supporting strip II 1-3 of the main measurement support 1, the relative position of the threaded rod of the supporting angle II 3 and the supporting strip II 1-3 can be axially adjusted through threads and fixed through nuts, and the supporting angle II 3 is placed in the center of a measuring surface of the electronic scale II 6; the threaded rod of the supporting angle III 4 is in threaded connection with the threaded through hole of the support bar III 1-4 of the main measurement support 1, the relative position of the threaded rod of the supporting angle III 4 and the support bar III 1-4 can be axially adjusted through threads and fixed through nuts, and the supporting angle III 4 is placed in the center of the measurement surface of the electronic scale III 7; the first level ruler 8 is placed at the edge position of the upper surface of the supporting disc 1-1 of the main support 1, the second level ruler 9 is placed at the edge position of the upper surface of the supporting disc 1-1 of the main support 1, and the first level ruler 8 and the second level ruler 9 are placed in a mutually perpendicular state.
The patent also provides a measuring method of the measuring structure of the center of gravity of the rotary table and the center deviation of the rotary shaft, referring to fig. 4 and 5, the rotary table 10 is the rotary table to be measured, the axis five 11 is the central line of the rotary shaft of the rotary table 10, the center of gravity one 12 is the rotary table 10 and the main support 1, the integral gravity centers of the first supporting angle 2, the second supporting angle 3 and the third supporting angle 4, the axis six 13 is the axial center line of the threaded rod of the first supporting angle 2, the first projection point 14 is a projection point projected on the second axis 1-7 after a space coordinate of the first gravity center 12 is projected on the projection plane 1-6 as a plane coordinate, the second projection point 15 is a projection point projected on the third axis 1-8 after the space coordinate of the first gravity center 12 is projected on the projection plane 1-6 as a plane coordinate, and the third projection point 16 is a projection point projected on the fourth axis 1-9 after the space coordinate of the first gravity center 12 is projected on the projection plane 1-6 as a plane coordinate; the method for measuring the center of gravity deviation of the turntable comprises the following steps:
1) under the condition that a rotary table to be measured is not placed, the axial relative positions of a support angle I2 and a support strip I1-2 of a main measurement support 1, the axial relative positions of a support angle II 3 and a support strip II 1-3 of the main measurement support 1, and the axial relative positions of a support angle III 4 and a support strip III 1-4 of the main measurement support 1 are respectively adjusted axially and fixed through nuts, so that measurement readings of a horizontal ruler I8 and a horizontal ruler II 9 in two vertical directions are displayed in a horizontal state;
2) removing the first horizontal ruler 8 and the second horizontal ruler 9, fixedly installing a plurality of counterweight strip plates made of stainless steel materials at the bottom of a supporting disc 1-1 of the main measurement support 1 through screws, balancing the main measurement support 1 so that the weighing readings of the first electronic scale 5, the second electronic scale 6 and the third electronic scale 7 are the same, and recording the sum of the readings of the first electronic scale 5, the second electronic scale 6 and the third electronic scale 7, namely the sum M2 of the masses of the main measurement support 1, the first support angle 2, the second support angle 3 and the third support angle 4, which is 52.5 kg;
3) the mass M3 of the turntable to be measured, i.e. the turntable 10, is measured and recorded to be 129 kg, then:
M1＝M2+M3 (1)
wherein M1 is the total mass of the turntable 10, the measurement main support 1, the first supporting angle 2, the second supporting angle 3 and the third supporting angle 4, and M1 is 181.5 kg;
4) installing a rotary table to be measured, wherein the rotary table 10 is fixedly installed with a support disc 1-1 of the main measurement support 1 through a screw, so that an axis five 11 of the rotary table 10 is superposed with an axis I1-5 of the main measurement support 1;
5) recording the weighing reading of the electronic scale I5, measuring and recording the distance between the axis six 13 of the supporting angle I2 and the axis five 11 of the rotary table 10, and then:
(M4-M1/3)·L1＝M1·L2 (2)
wherein M4 is the weighing reading of the electronic scale I5, and is 60.3 kg, L1 is the distance between the axis six 13 of the supporting angle I2 and the axis five 11 of the rotary table 10, L1 is 500 mm, and L2 is the distance between the projection point I14 and the axis five 11 of the rotary table 10;
the L2 value can be obtained by the calculation of the formula (2), L2 is-0.551 mm, and the negative value indicates that the projection point I14 is in the opposite direction of the axis II 1-7;
similarly, the distance between the second projection point 15 and the fifth axis 11 of the rotary table 10 can be obtained by the weighing reading of the second electronic scale 6 and the distance between the axial center line of the threaded rod of the second support angle 3 and the fifth axis 11 of the rotary table 10, the distance between the third projection point 16 and the fifth axis 11 of the rotary table 10 can be obtained by the weighing reading of the third electronic scale 7 and the distance between the axial center line of the threaded rod of the third support angle 4 and the fifth axis 11 of the rotary table 10, the distance between the first projection point 14, the second projection point 15 and the third projection point 16 on the projection plane 1-6 can be obtained by plane geometric synthesis, the distance between the first gravity center 12 and the fifth axis 11 of the rotary table 10 can be obtained to be 0.826 mm, and the deviation of the gravity centers of the rotary table 10, the measuring main support 1, the first support angle 2, the second support angle 3 and the third support angle 4;
6) this time is:
M1·L3＝M3·L4 (3)
wherein, L3 is the distance between the first gravity center 12 and the axis five 11 of the turntable 10, and L4 is the distance between the gravity center of the turntable 10 and the axis five 11 of the turntable 10;
the L4 value calculated by the formula (3) is 1.162 mm, namely the deviation between the center of gravity of the turntable 10 and the center of the rotating shaft is measured.
Claims (1)
1. A turntable gravity center and rotating shaft center deviation measuring structure comprises a main support (1), a first supporting angle (2), a second supporting angle (3), a third supporting angle (4), a first electronic scale (5), a second electronic scale (6), a third electronic scale (7), a first horizontal ruler (8) and a second horizontal ruler (9); the method is characterized in that:
the main measuring support (1) comprises a support disc (1-1), a first support strip (1-2), a second support strip (1-3) and a third support strip (1-4); the structure is as follows: the supporting disc (1-1) is of a disc structure made of stainless steel materials, the thickness of the supporting disc is 10-30 mm, and the diameter of the supporting disc is 100 mm larger than the mounting surface of the turntable to be measured; the first support strip (1-2), the second support strip (1-3) and the third support strip (1-4) are of the same structure and material, and are all cut by channel aluminum or channel steel, and one end of the channel aluminum or channel steel is chamfered and is provided with a threaded through hole; the axis I (1-5) is an axial geometric center line of the supporting disc (1-1), the supporting bar I (1-2), the supporting bar II (1-3) and the supporting bar III (1-4) are fixedly connected with the supporting disc (1-1) through welding or screws respectively, the non-chamfered end faces of the supporting bar I (1-2), the supporting bar II (1-3) and the supporting bar III (1-4) are equal to the distance from the axis I (1-5), the supporting bar I (1-2), the supporting bar II (1-3) and the supporting bar III (1-4) are distributed in a circumferential trisection mode around the axis I (1-5) on a circular mounting surface at the bottom of the supporting disc (1-1), the projection surface (1-6) is an upper surface of the supporting disc (1-1), and the axis II (1-7) is the length direction of the supporting bar I (1-2) on the projection surface (1-1) -6), wherein an axis three (1-8) is a center line of a support bar two (1-3) in the length direction on the projection surface (1-6), an axis four (1-9) is a center line of a support bar three (1-4) in the length direction on the projection surface (1-6), and included angles between the axis two (1-7) and the axis three (1-8), between the axis three (1-8) and the axis four (1-9), and between the axis two (1-7) and the axis four (1-9) are all 120 degrees;
the first supporting angle (2), the second supporting angle (3) and the third supporting angle (4) are of the same structure and material, the upper end of the first supporting angle is a threaded rod, the lower end of the first supporting angle is a disc support, and the threaded rod and the disc support are connected by a universal joint; a first supporting angle (2) threaded rod is in threaded connection with a first supporting strip (1-2) threaded through hole of the main measuring support (1), the relative position of the first supporting angle (2) threaded rod and the first supporting strip (1-2) can be axially adjusted through threads and fixed through nuts, and the first supporting angle (2) is placed in the center of a measuring surface of the first electronic scale (5); a threaded rod of a supporting angle II (3) is in threaded connection with a threaded through hole of a supporting bar II (1-3) of the main measurement support (1), the relative position of the threaded rod of the supporting angle II (3) and the supporting bar II (1-3) can be axially adjusted through threads and fixed through nuts, and the supporting angle II (3) is placed in the center of the measuring surface of the electronic scale II (6); a threaded rod of a supporting angle III (4) is in threaded connection with a threaded through hole of a supporting bar III (1-4) of the main measurement support (1), the relative position of the threaded rod of the supporting angle III (4) and the supporting bar III (1-4) can be axially adjusted through threads and fixed through nuts, and the supporting angle III (4) is placed in the center of the measurement surface of the electronic scale III (7); the first level ruler (8) is placed at the edge position of the upper surface of a supporting disc (1-1) of the main support (1), the second level ruler (9) is placed at the edge position of the upper surface of the supporting disc (1-1) of the main support (1), and the first level ruler (8) and the second level ruler (9) are placed in a mutually perpendicular state.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411661A (en) * | 2019-07-10 | 2019-11-05 | 中国科学院上海技术物理研究所 | Turntable center of gravity and spindle central bias measurement structure and measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110411661A (en) * | 2019-07-10 | 2019-11-05 | 中国科学院上海技术物理研究所 | Turntable center of gravity and spindle central bias measurement structure and measurement method |
| CN110411661B (en) * | 2019-07-10 | 2024-03-26 | 中国科学院上海技术物理研究所 | Structure and method for measuring deviation between center of gravity of turntable and center of rotating shaft |
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