CN114993135A - Rotation precision detection tool, manufacturing method and detection method - Google Patents
Rotation precision detection tool, manufacturing method and detection method Download PDFInfo
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- CN114993135A CN114993135A CN202210744188.5A CN202210744188A CN114993135A CN 114993135 A CN114993135 A CN 114993135A CN 202210744188 A CN202210744188 A CN 202210744188A CN 114993135 A CN114993135 A CN 114993135A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
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Abstract
The invention provides a rotation precision detection tool, which comprises: a tray body and a ball; the tray body is provided with a groove which is annular and concentric with the tray body, a plurality of balls are arranged in the groove, gaps are formed among the balls and are equal, and the axis of the tray body is coincided with the rotating shaft. The invention discloses a manufacturing method of a rotary precision detection tool, which can manufacture the rotary precision detection tool of a rotary shaft and has high precision meeting requirements. A method for detecting the rotation precision of a rotating shaft comprises the following steps: mounting a rotary shaft rotation precision detection tool on a workbench; the workbench rotates by a set angle; and measuring the rotation angle of the round ball. The rotation precision detection tool and the detection method disclosed by the invention can simply, conveniently and accurately detect and correct the positioning precision of the rotating shaft of the five-axis machine tool.
Description
Technical Field
The invention relates to the technical field of machine tool detection, in particular to a rotation precision detection tool, a manufacturing method and a detection method.
Background
At present, five-axis numerical control machines are more and more, the rotation positioning precision of the machine tool needs to be regularly corrected and compensated, and in the prior art, a laser interferometer is generally adopted for correction and compensation means.
However, when the laser interferometer is used for checking and correcting the positioning accuracy of the rotating shaft, not only the operation is very troublesome, but also the accuracy of the checking and correcting is difficult to guarantee, which seriously influences the processing of the machine tool on the high-accuracy workpiece.
Disclosure of Invention
The invention provides a rotation precision detection tool, a manufacturing method and a detection method, and aims to solve the problems.
The utility model provides a gyration precision detection frock, includes: a tray body and a ball;
the improved rotary table is characterized in that a groove is formed in the table body, the groove is annular and concentric with the table body, the balls are arranged in the groove, gaps are formed among the balls and are equal to each other, and the axis of the table body is coincident with the rotary axis.
Furthermore, the groove comprises an inner side surface, an outer side surface and a bottom surface, the height of the outer side surface is not smaller than the radius of the ball, and the ball is attached to the outer side surface and the bottom surface.
Furthermore, the groove comprises an inner side surface, an outer side surface and a bottom surface, the height of the outer side surface is not larger than the radius of the ball, and the ball is attached to the upper edge and the bottom surface of the outer side surface.
Furthermore, the number of the round balls is 72, and gaps are formed among the round balls.
Further, the disc body is provided with a center hole, the center rod penetrates through the center hole, and the axis of the center rod is superposed with the rotary axis of the workbench and is superposed with the axis of the center hole.
Furthermore, the device also comprises a coordinate rod, one end of the coordinate rod is hinged to the centering rod and can move along the axis of the centering rod, and the other end of the coordinate rod is provided with a positioning ball which is positioned above the round ball.
A manufacturing method of a rotation precision detection tool is characterized by comprising the following steps:
s1: a groove is arranged on the tray body;
s2: a ball is arranged in the groove;
s3: injecting a liquid setting material into the groove to immerse the lower part of the ball into the setting material;
s4: the disk body is driven to rotate at a constant speed until the shaping material is shaped and solidified.
A rotation precision detection method comprises the following steps:
s1: mounting a rotary shaft rotation precision detection tool on a workbench;
s2: the workbench rotates by a set angle;
s3: and measuring the rotation angle of the round ball.
Further, the angle of the table rotation is equal to an integral multiple of γ, where γ is 360 °/n, where n is the number of spheres.
Furthermore, a dial indicator is installed on the spindle, any one of the round balls is set to be an initial round ball, the spindle drives the dial indicator to detect the position of a point A on the surface of the initial round ball, after the servo motor rotates for a set angle, the spindle drives the dial indicator to detect the position of a point B on the surface of the round ball at the same Z-axis position, and the positions of the point A and the point B on the X-axis and the Y-axis are compared.
The rotary precision detection tool and the detection method disclosed by the invention can simply, conveniently and accurately detect and correct the positioning precision of the rotating shaft of the five-axis machine tool.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a rotation precision detection tool disclosed in embodiment 1 of the present invention;
fig. 2 is a top view of a rotation precision detection tool disclosed in embodiment 1 of the present invention;
FIG. 3 is a cross-sectional view taken from the perspective A-A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 3;
fig. 5 is an enlarged view of a portion of the sphere disclosed in example 2 of the present invention.
In the figure:
1. a tray body; 11. a groove; 12. an inner side surface; 13. an outer side surface; 14. a bottom surface;
2. a ball;
3. a centering rod;
4. a work table;
5. a coordinate lever; 51. and a positioning ball.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 and 2, a rotation precision detection tool includes: a tray body 1 and a ball 2;
the tray body 1 is provided with an annular groove 11 concentric with the tray body 1, the balls 2 are arranged in the groove 11, gaps are formed among the balls 2, the gaps among the balls 2 are equal, and the axis of the tray body 1 coincides with the rotation axis.
The round balls in the embodiment are G10-grade high-precision steel balls, the grooves 11 are circular grooves which are concentric with the tray body 1, gaps among the round balls are very small, and the round balls are nearly full.
The round balls equally divide the circumference into a plurality of parts, and because the precision of the round balls is very high, when the disk body 1 rotates around the axis of the disk body, the corresponding angles of the same positions on each round ball are the same. Specifically, when the disk body 1 is fixed on a workbench on which a rotating shaft is arranged, the workbench rotates, the disk body rotates along with the workbench, the workbench is driven by the servo motor to rotate by a fixed angle, and an angle error between an actual rotating angle of the workbench and the rotating angle driven by the servo motor can be measured by high-precision spheres arranged at equal intervals. The circles are equally divided by the balls, the corresponding angle of each rotating ball is fixed, the rotating angle of the servo motor is set as a fixed multiple of the corresponding angle of each ball, the actual rotating angle of the disc body can be calculated by measuring the change of the relatively same position on each ball, the rotating angle of the disc body is the rotating angle of the workbench, the error alpha of the rotating angle of the workbench can be obtained, and the obtained angle error and the angle corresponding to the rotation compensation file of the numerical control system are used for determining a new angle compensation value +/-alpha.
In the embodiment shown in fig. 3 and 4, the groove 11 includes an inner side 12, an outer side 13 and a bottom 14, the height of the outer side 13 is not greater than the radius of the round ball 2, and the round ball 2 abuts against the upper edge and the bottom 14 of the outer side 13. The nearest point on the sphere among the plurality of spheres 2 is a detection point, and the position of the point can be detected by observing and measuring through a high power microscope or measuring through laser and the like, so that the rotating angle of the disc body can be obtained. The upper edge of the outer side 13 is lower than the detection point and can be directly observed and measured by a high-power microscope.
The ball 2 is tightly attached to the upper edge of the outer side surface, and the accuracy of the outer side surface is controlled, so that the ball 2 has high position accuracy. Meanwhile, the inner side surface is not contacted with the round ball 2, so that the position precision of the round ball 2 is prevented from being influenced.
In this embodiment, the number of the round balls 2 is 72, and gaps are formed between the round balls 2. The width of the gap is about 0.005mm, the circumference of the gap is equally divided by 72 round balls, and the corresponding angle of each round ball is 5 degrees, namely, the round balls rotate at the same position and rotate at an angle of 5 degrees correspondingly.
The disc body 1 is provided with a center hole, and the axis of the center rod 3 coincides with the rotation axis of the workbench 4 and coincides with the axis of the center hole. The rotation center of the working table 4 is provided with a positioning hole, and the centering rod 3 penetrates through the center hole and the positioning hole on the working table 4, so that the disc body 1 is coaxial with the working table 4.
The centering rod comprises a centering rod 3, and further comprises a coordinate rod 5, one end of the coordinate rod 5 is hinged to the centering rod 3 and can move along the axis of the centering rod 3, the other end of the coordinate rod 5 is provided with a positioning ball 51, and the positioning ball 51 is located above the round ball 2.
The coordinate rod 5 moves along the axis of the centering rod 3, so that the positioning ball 51 is abutted to the two adjacent round balls 2, and at the moment, the straight line of the coordinate rod 5 passes through the two adjacent round balls 2. The initial position of the ball 2 is determined by rotating the workbench through the angle of the coordinate rod 5, so that observation measurement or laser measurement can be conveniently carried out by using a high power microscope.
The manufacturing method of the rotation precision detection tool in the embodiment comprises the following steps:
s1: a groove is arranged on the tray body;
s2: a ball is arranged in the groove;
s3: injecting a liquid setting material into the groove to immerse the lower part of the ball into the setting material;
s4: the disk body is driven to rotate at a constant speed until the setting material is set and cured.
During the process of uniform rotation of the disc body, the balls rotate along with the disc body, and during rotation, the balls are subjected to centrifugal force with the same size, and along with the rotation, the balls gradually collide and rub with each other, and the distance between the balls is adjusted until the distances between the balls are completely equal. Under the action of centrifugal force, the distance between the balls is not changed any more, and the balls are kept in a rotating state until the shaping material is shaped and solidified, so that the positions of the balls are fixed.
The shaping material in this embodiment is resin, and the resin is injected into the groove, and after the resin is cured, the position of the sphere can be fixed, and the same gap is maintained.
The embodiment also discloses a rotation precision detection method, which comprises the following steps:
s1: installing a rotation precision detection tool on a workbench; the centering rod 3 passes through the central hole 16 and the positioning hole on the worktable 4, so that the disc body 1 is coaxial with the worktable 4.
S2: the servo motor drives the workbench to rotate by a set angle; the rotation angle of the workbench is equal to the integral multiple of gamma, wherein the gamma is 360 DEG/n, and n is the number of the spheres.
S3: and detecting the rotation angle of the ball.
Specific methods for detecting the rotation angle of the sphere include, but are not limited to, microscopic observation and measurement, laser measurement and dial indicator measurement.
The microscope observation and measurement method adopts a high power microscope, and in this embodiment, a microscope with a magnification of 1000 times is used, and the microscope is provided with scales. Firstly, selecting a steel ball, taking a detection point of the selected steel ball as an initial detection point, and enabling the detection point of the selected steel ball to be at a position easy to observe; then placing the microscope to enable the microscope to face the initial detection point; and then starting a servo motor, rotating by a specified angle, such as 5 degrees, reading the offset of a detection point through the scale on the microscope after the rotation is finished, and calculating an angle error through the offset.
The laser measuring method is similar to a microscope observation measuring method, and is different in that laser is adjusted to a position just shielded by a detected point, then a servo motor is started, after a set angle is rotated, the position just shielded by the detected point is detected again through the laser, the difference value of the two positions is the offset of the detected point, and an angle error is calculated through the offset.
Firstly, installing a dial indicator on a main shaft; then, driving a dial indicator through a main shaft, setting any one of the spheres as an initial sphere, and enabling the dial indicator to detect the position of any point A on the surface of the selected initial sphere, wherein the preferred position is the high point of the sphere; and then the main shaft drives the dial indicator to leave the detection position, after the servo motor drives the workbench to rotate for a set angle, the main shaft drives the dial indicator to detect the position of a point B on the surface of the ball at the same Z-axis position, and the positions of the point A and the point B on the X-axis and the Y-axis are compared. The offset of the positions of the point A and the point B can be detected through the dial indicator, and the angle error is calculated through the offset.
During detection, the preferable measurement direction is the Y-axis direction of the machine tool, the coordinate rod is moved downwards, the positioning ball 51 is abutted against the two round balls, the rotating shaft is adjusted, the coordinate rod is parallel to the Y-axis, one of the two round balls abutted against the positioning ball 51 can be selected as an initial round ball, and the measurement position is better.
The detection needs to be carried out for multiple times, data is recorded for multiple times, an angle error alpha is calculated through multiple times of detection, and a new angle compensation value +/-alpha is determined according to the obtained angle error and the angle corresponding to the rotation compensation file of the numerical control system.
Example 2
As shown in fig. 5, the difference between this embodiment and embodiment 1 is that the groove 11 includes an inner side 12, an outer side 13 and a bottom 14, the height of the outer side 13 is not less than the radius of the round ball 2, and the round ball 2 abuts against the outer side 13 and the bottom 14.
The lateral surface 13 is higher, and in the work manufacturing process, the disk body is when rotatory, and the ball is more stable in the recess, avoids the departure. In the detection, a lever dial indicator measurement method can be adopted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a gyration precision detection frock which characterized in that includes: a disc body (1) and a sphere (2);
be equipped with recess (11) on disk body (1), recess (11) are the annular, and with disk body (1) is concentric, and a plurality of ball (2) are located in recess (11), it equals to have clearance and clearance between ball (2), the axis and the gyration axis coincidence of disk body (1).
2. The rotation precision detection tool according to claim 1, wherein the groove (11) comprises an inner side surface (12), an outer side surface (13) and a bottom surface (14), the height of the outer side surface (13) is not less than the radius of the round ball (2), and the round ball (2) is attached to the outer side surface (13) and the bottom surface (14).
3. The rotation precision detection tool according to claim 1, wherein the groove (11) comprises an inner side surface (12), an outer side surface (13) and a bottom surface (14), the height of the outer side surface (13) is not larger than the radius of the ball (2), and the ball (2) is attached to the upper edge and the bottom surface (14) of the outer side surface (13).
4. The tool for detecting the rotation precision as claimed in claim 1, wherein the number of the round balls (2) is 72, and a gap is formed between the round balls (2).
5. The gyration accuracy detection tool according to claim 1, characterized in that it further comprises a centering rod (3), said disk body (1) is provided with a central hole (16), said centering rod (3) passes through said central hole (16), and the axis of said centering rod (3) coincides with the gyration axis of said worktable (4) and coincides with the axis of said central hole (16).
6. The gyration accuracy detection tool according to claim 5, characterized by further comprising a coordinate rod (5), wherein one end of the coordinate rod (5) is hinged to the centering rod (3) and can move along the axis of the centering rod (3), the other end of the coordinate rod is provided with a positioning ball (51), and the positioning ball (51) is positioned above the round ball (2).
7. The manufacturing method of the slewing precision detection tool according to claim 1, comprising the following steps:
s1: a groove is arranged on the tray body;
s2: a ball is arranged in the groove;
s3: injecting a liquid setting material into the groove to immerse the lower part of the ball into the setting material;
s4: the disk body is driven to rotate at a constant speed until the shaping material is shaped and solidified.
8. A rotation accuracy detecting method characterized by using the rotation accuracy detecting tool according to claim 1, comprising the steps of:
s1: installing the rotary accuracy detection tool of any one of claims 1 to 6 on a workbench;
s2: the servo motor rotates a set angle;
s3: and measuring the rotation angle of the round ball.
9. The rotation accuracy detecting method according to claim 8, wherein the angle of rotation of the table is equal to an integer multiple of γ, where γ is 360 °/n, where n is the number of the spheres.
10. The rotation precision detecting method according to claim 9, wherein a dial indicator is installed on the spindle, any one of the round balls is set as an initial round ball, the spindle drives the dial indicator to detect the position of a point a on the surface of the initial round ball, after the servo motor rotates for a set angle, the spindle drives the dial indicator to detect the position of a point B on the surface of the round ball at the same Z-axis position, and the positions of the point a and the point B on the X-axis and the Y-axis are compared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210744188.5A CN114993135A (en) | 2022-06-27 | 2022-06-27 | Rotation precision detection tool, manufacturing method and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210744188.5A CN114993135A (en) | 2022-06-27 | 2022-06-27 | Rotation precision detection tool, manufacturing method and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN114993135A true CN114993135A (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210744188.5A Pending CN114993135A (en) | 2022-06-27 | 2022-06-27 | Rotation precision detection tool, manufacturing method and detection method |
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| CN (1) | CN114993135A (en) |
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2022
- 2022-06-27 CN CN202210744188.5A patent/CN114993135A/en active Pending
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