Method for detecting and adjusting mounting precision of rotating shaft of machine tool

Abstract

The invention provides a method for detecting and adjusting the installation precision of a machine tool rotating shaft, the machine tool rotating shaft is driven by a motor to rotate, a standard ball is installed on a rotor of the motor or a part rotating along with the rotor of the motor, and the method comprises the steps of rotating the machine tool rotating shaft around the axis of the machine tool rotating shaft to a first position, measuring a first sphere center coordinate of the standard sphere at the first position; rotating the machine tool rotating shaft to a second position around the own axis, and measuring a second ball center coordinate of the standard ball at the second position; respectively extracting coordinate values in the two sphere center coordinates in the first direction, wherein the difference between the two coordinate values is used for measuring the deviation of the axial direction of the machine tool rotating shaft relative to the reference shaft in the second direction; if the deviation of the machine tool rotating shaft in the second direction does not meet the requirement, the machine tool rotating shaft is adjusted in the second direction and detected again till the requirement is met. Compared with a traditional detection and adjustment method, the detection and adjustment method is obviously improved in the aspects of precision, efficiency and the like.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of machine tool technology, and in particular to a method for detecting and adjusting the installation accuracy of a rotating axis of a machine tool. Background Art

[0002] The five-axis machine tool has three moving axes and two rotating axes, among which the installation accuracy of the rotating axis directly affects the machining accuracy of the machine tool. Among the installation accuracy of the rotating axis, the parallelism between the rotating axis axis and the corresponding reference axis axis is an important indicator of the installation accuracy of the rotating axis. During the installation and debugging process, it should be ensured that this indicator is within the required range.

[0003] The existing installation and debugging method of the rotating axis of the machine tool is to use a micrometer and a test rod for detection. The detection process is manually operated to read the micrometer, which is cumbersome and inefficient; the machining accuracy of the test rod itself is difficult to guarantee, and the test rod is prone to wear after long-term use, so the accuracy is low; when the axis of the rotating axis to be detected is not parallel to the direction of gravity, it is affected by the gravity of the test rod, and the detection result is more inaccurate, which further affects the installation accuracy of the rotating axis. Summary of the invention

[0004] The embodiments of the present application are intended to solve at least one of the existing technical problems. The embodiments of the present application provide a method for detecting and adjusting the installation accuracy of a rotating axis of a machine tool, which improves the accuracy and efficiency of the detection and adjustment method to a certain extent.

[0005] The embodiment of the present application provides a method for detecting and adjusting the installation accuracy of a rotating shaft of a machine tool. The rotating shaft of the machine tool is driven to rotate by a motor, a standard ball is installed on the rotor of the motor or a component rotating with the rotor of the motor, and the method for detecting and adjusting the installation accuracy of the rotating shaft of the machine tool includes:

[0006] Rotate the machine tool rotation axis around its own axis to a first position, and measure the first spherical center coordinates of the standard sphere located at the first position;

[0007] Rotate the machine tool rotation axis around its own axis to a second position, and measure the second spherical center coordinates of the standard sphere located at the second position, wherein the first spherical center coordinates and the second spherical center coordinates both include coordinate values ​​in a first direction, a second direction, and a third direction, the first direction is the axial direction of the reference axis, the first direction, the second direction, and the third direction are perpendicular to each other, and the first position and the second position are located at the two farthest points of the standard sphere in the negative direction and the positive direction of the second direction, respectively;

[0008] Extracting the coordinate values ​​in the first direction from the first spherical center coordinates and the second spherical center coordinates respectively, and the difference between the two is used to measure the deviation of the axial direction of the machine tool rotation axis relative to the reference axis in the second direction;

[0009] If the deviation of the machine tool rotation axis in the second direction does not meet the requirement, the machine tool rotation axis is adjusted along the second direction and re-detected until the requirement is met.

[0010] Optionally, the machine tool rotation axis is rotated around its own axis to a third position, and the third spherical center coordinates of the standard sphere located at the third position are measured;

[0011] Rotate the machine tool rotation axis around its own axis to a fourth position, and measure the fourth spherical center coordinates of the standard sphere located at the fourth position, wherein the third spherical center coordinates and the fourth spherical center coordinates both include coordinate values ​​in the first direction, the second direction and the third direction, and the third position and the fourth position are located at the two farthest points of the standard sphere in the negative direction and the positive direction of the third direction, respectively;

[0012] Extracting the coordinate values ​​in the first direction from the third spherical center coordinates and the fourth spherical center coordinates respectively, and the difference between the two is used to measure the deviation of the axial direction of the machine tool rotation axis relative to the reference axis in the third direction;

[0013] If the deviation of the machine tool rotation axis in the third direction does not meet the requirement, the machine tool rotation axis is adjusted along the third direction and re-detected until the requirement is met.

[0014] Optionally, determining the coordinates of the center of the standard ball at the first position, the second position, the third position or the fourth position further includes: driving the probe to contact at least four different position points on the spherical surface of the standard ball at the position, performing fitting sphere calculation on the three coordinate values ​​of the obtained different position points, and obtaining the coordinates of the center of the fitting sphere and using them as the coordinates of the center of the standard ball at the position.

[0015] Optionally, the installation accuracy detection and adjustment method of the machine tool rotating axis also includes: fixing the standard ball on the motor rotor or a component rotating with the motor rotor through a connecting seat, installing a probe on the main shaft of the machine tool, and installing a probe at a certain position of the machine tool and aligning it with the probe to receive the signal of the probe.

[0016] Optionally, if the coordinate value of the second sphere center coordinate in the first direction is less than the coordinate value of the first sphere center coordinate in the first direction, it is determined that the axial positive direction of the machine tool rotation axis forms an acute angle with respect to the positive direction of the second direction; if it is the opposite, it is determined that the axial positive direction of the machine tool rotation axis forms an obtuse angle with respect to the positive direction of the second direction.

[0017] Optionally, if the coordinate value of the fourth sphere center coordinate in the first direction is less than the coordinate value of the third sphere center coordinate in the first direction, it is determined that the axial positive direction of the machine tool rotation axis forms an acute angle with respect to the positive direction of the third direction; if it is the opposite, it is determined that the axial positive direction of the machine tool rotation axis forms an obtuse angle with respect to the positive direction of the third direction.

[0018] Optionally, the machine tool rotating shaft is installed on a rotating shaft mounting seat through a sleeve, the rotating shaft mounting seat is provided with a mounting hole for installing the machine tool rotating shaft, the sleeve is located in the mounting hole, the machine tool rotating shaft is located in the sleeve and can rotate relative to the sleeve, one end of the sleeve has a flange structure, and the flange structure is fixedly connected to a surface of the rotating shaft mounting seat where the mounting hole is provided.

[0019] Optionally, the process of adjusting the rotary axis of the machine tool includes:

[0020] If the deviation of the machine tool rotary axis in the second direction does not meet the requirement, a partial area on the rotary axis mounting seat fixedly connected to the flange structure is scraped, wherein the partial area is a portion of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or,

[0021] If the deviation of the machine tool rotating axis in the third direction does not meet the requirements, the partial area on the rotating axis mounting seat that is fixedly connected to the flange structure is scraped, wherein the partial area is the part of the area where the two are fixedly connected that corresponds to the positive direction or negative direction of the third direction.

[0022] Optionally, the rotating shaft mounting seat is mounted on a bed of the machine tool, and the rotating shaft mounting seat and the bed are detachably connected; the process of adjusting the rotating shaft of the machine tool includes:

[0023] If the deviation of the machine tool rotary axis in the second direction does not meet the requirement, the partial area where the rotary axis mounting seat is fixedly connected to the bed is scraped or the mounting posture of the rotary axis mounting seat on the bed is adjusted, wherein the partial area is the part of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or,

[0024] If the deviation of the machine tool rotating axis in the third direction does not meet the requirements, the partial area where the rotating axis mounting seat is fixedly connected to the bed is scraped or the installation posture of the rotating axis mounting seat on the bed is adjusted, wherein the partial area is the part corresponding to the positive direction or negative direction of the third direction in the area where the two are fixedly connected.

[0025] Optionally, the process of adjusting the machine tool rotating axis also includes: detecting whether the deviation between the normal direction of the surface of the rotating axis mounting seat having the mounting hole and the axial direction of the reference axis in the second direction and / or the third direction meets the requirements.

[0026] The installation accuracy detection and adjustment method of the machine tool rotating axis in the embodiment of the present application has at least the following technical effects: the accuracy of the standard ball is significantly improved compared with the inspection rod, and the standard ball is not easily affected by gravity during the detection process, so the accuracy of the detection adjustment method is improved to a certain extent compared with the traditional detection method; the deviation value of the axial direction of the rotating axis relative to the reference axis can be obtained by computer software based on the change value of the center coordinate of the standard ball in the first direction during the rotation of the rotating axis, and its efficiency is also significantly higher than that of the traditional detection method.

[0027] Additional aspects and advantages of the present application will be partially given in the following description. Thus, in part, they will become apparent from the following description or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic flow chart of a method for detecting and adjusting the installation accuracy of a machine tool rotary axis in some embodiments of the present application.

[0029] Figure 2 This is a schematic diagram of the state of the rotating axis of a machine tool when the standard ball is located at the first position in some embodiments of the present application.

[0030] Figure 3 This is a schematic diagram of the state of the rotating axis of a machine tool when the standard ball is located at the second position in some embodiments of the present application.

[0031] Figure 4 This is a simplified schematic diagram of the rotation of a machine tool rotary axis around its own axis (ie, A-axis) in some embodiments of the present application, wherein the own axis A-axis is not parallel to the reference axis X-axis.

[0032] Figure 5 This is a schematic diagram of the state of the rotating axis of a machine tool when the standard ball is located at the third position in some embodiments of the present application.

[0033] Figure 6 This is a schematic diagram of the state of the machine tool rotation axis when the standard ball is located at the fourth position in some embodiments of the present application.

[0034] In the figure:

[0035] 10-machine tool rotating axis; 20-standard ball; 30-rotating axis mounting seat; 40-flange structure. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below.

[0037] Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, without paying creative work, drawings of other embodiments can also be obtained according to the technical solutions shown in these drawings.

[0038] It should be understood that the "plurality" mentioned herein refers to two or more than two. In the description of this application, unless otherwise specified, " / " means or, for example, "A / B" means A or B; "and / or" in this article is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, "A and / or B" can mean: A exists alone, A and B exist at the same time, B exists alone, etc.

[0039] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, expressions such as "first" or "second" are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that expressions such as "first" and "second" do not limit the quantity and execution order, and expressions such as "first" and "second" do not necessarily mean that they are different.

[0040] The “installation”, “connection” and “setting” mentioned in this article include direct installation / connection / setting as well as indirect installation / connection / setting; include detachable installation / connection / setting as well as non-detachable installation / connection / setting; include fixed installation / connection / setting as well as movable installation / connection / setting.

[0041] The embodiment of the present application takes a cradle turntable type five-axis CNC machine tool as an example to introduce a method for detecting and adjusting the installation accuracy of the machine tool rotation axis. More specifically, taking the A-axis rotation axis of the cradle turntable of the cradle turntable type five-axis CNC machine tool as an example, the method for detecting and adjusting the installation accuracy of the machine tool rotation axis in the embodiment of the present application is introduced. The spindle of the cradle turntable type five-axis CNC machine tool can rotate around the vertical Z-axis, that is, the other rotation axis C-axis is in the vertical direction. It is not difficult to understand that the machine tool rotation axis in the embodiment of the present application is not limited to the A-axis rotation axis of the cradle turntable. The installation accuracy detection and adjustment method of the machine tool rotation axis in the embodiment of the present application is not limited to the installation and debugging of the rotation axis of the vertical machine tool, nor is it limited to the installation and debugging of the rotation axis of the CNC machine tool.

[0042] For ease of understanding, in combination with the embodiments of the present application and its accompanying drawings, the installation accuracy detection and adjustment method of the machine tool rotary axis in the embodiment of the present application is introduced by taking the axial direction of the X-axis as the first direction, the axial direction of the Y-axis as the second direction, and the axial direction of the Z-axis as the third direction as an example. It can be understood that the first direction, the second direction, and the third direction may also be other directions.

[0043] See also Figures 1 to 4 The embodiment of the present application provides a method for detecting and adjusting the installation accuracy of a rotating shaft of a machine tool. The rotating shaft 10 of the machine tool is driven to rotate by a motor, and a standard ball 20 is installed on the rotor of the motor or a component that rotates with the rotor of the motor. Figure 1 As shown, the installation accuracy detection and adjustment method of the machine tool rotating shaft 10 includes steps S120, S140, S160 and S180:

[0044] Step S120: Please refer to Figure 2 , rotate the machine tool rotation axis 10 around its own axis to a first position, and measure the first spherical center coordinates P1 = (x1, y1, z1) of the standard sphere 20 located at the first position.

[0045] Step S140: Please refer to Figure 3 , rotate the machine tool rotation axis 10 around its own axis to the second position, and measure the second sphere center coordinate P2 = (x2, y2, z2) of the standard ball 20 located at the second position, wherein the first sphere center coordinate P1 = (x1, y1, z1) and the second sphere center coordinate P2 = (x2, y2, z2) both include coordinate values ​​in the first direction, the second direction and the third direction, the first direction is the axial direction of the reference axis, the first direction, the second direction and the third direction are perpendicular to each other, and the first position and the second position are located at the two farthest points of the standard ball 20 in the negative direction and the positive direction of the second direction, respectively. Specifically, as Figure 2 as well as Figure 3 As shown in the figure, the reference axis is the X axis of the machine tool. Figure 2 as well as Figure 3 In the diagram, the first direction is the X-axis of the machine tool, the second direction is the Y-axis of the machine tool, and the third direction is the Z-axis of the machine tool. Figure 2 as well as Figure 3 , in the process from the first position to the second position, the machine tool rotary axis 10 rotates 180°. It is not difficult to understand that during the rotation of the machine tool rotary axis 10, the path trajectory of the center of the standard ball 20 is an arc. If the machine tool rotary axis 10 can rotate 360°, the path trajectory of the center of the standard ball 20 is a complete circle. The center of the circle is the point on the plane where the axis of the machine tool rotary axis 10 corresponds to the circle.

[0046] Step S160: Extract the coordinate values ​​in the first direction of the first spherical center coordinate P1 = (x1, y1, z1) and the second spherical center coordinate P2 = (x2, y2, z2) respectively. The difference between the two is used to measure the deviation of the axial direction of the machine tool rotation axis 10 relative to the reference axis in the second direction. Specifically, if the first direction is the axial direction of the X-axis of the machine tool, the difference between the two spherical center coordinates is Δx = x2-x1. When the axial direction of the axis of the machine tool rotation axis 10 is not parallel to the first direction (i.e., the axial direction of the reference axis), if the machine tool rotation axis 10 rotates around its own axis within a certain angle range, the spherical center coordinate of the standard sphere 20 will change in the first direction. Please refer to Figure 4 , under the premise that the axis of the machine tool rotary axis 10 (i.e., axis A) is not parallel to the reference axis X, the machine tool rotary axis 10 rotates around its own axis by Figure 2 The first position to Figure 3 The second position of Figure 3 The second position of Figure 2 The difference Δx between the spherical center coordinates of the first position and the second position reflects the deviation of the axial direction of the machine tool rotation axis 10 relative to the reference axis in the second direction (ie, the Y-axis direction).

[0047] Step S180: If the deviation of the machine tool rotary axis 10 in the second direction does not meet the requirement, adjust the machine tool rotary axis 10 along the second direction and re-test until the requirement is met. Figure 3 The second position of Figure 2 If the difference Δx between the spherical center coordinates of the first position and the second position exceeds the set threshold, it means that the deviation of the machine tool rotary axis 10 in the second direction does not meet the requirements. At this time, the machine tool rotary axis 10 should be adjusted along the second direction to reduce the deviation of the machine tool rotary axis 10 in the second direction. After adjustment, the above process should be repeated to re-test until the requirements are met.

[0048] In the installation accuracy detection and adjustment method for the machine tool rotating axis provided in the embodiment of the present application, the accuracy of the standard ball is significantly improved compared with the detection rod, and the standard ball is not easily affected by gravity during the detection process. Therefore, the accuracy of the detection and adjustment method is improved to a certain extent compared with the traditional detection method; the deviation value of the axial direction of the rotating axis relative to the reference axis can be obtained by computer software based on the change value of the center coordinate of the standard ball in the first direction during the rotation of the rotating axis, and its efficiency is also significantly higher than that of the traditional detection method.

[0049] Optionally, in some embodiments of the present application, the installation accuracy detection and adjustment method of the machine tool rotating axis can also detect and adjust the deviation of the machine tool rotating axis 10 in the third direction, and the general process includes step S220, step S240, step S260 and step S280.

[0050] Step S220: Please refer to Figure 5 , rotate the machine tool rotation axis 10 around its own axis to a third position, and measure the third spherical center coordinates P3 = (x3, y3, z3) of the standard sphere 20 located at the third position.

[0051] Step S240: Please refer to Figure 6 , rotate the machine tool rotation axis 10 around its own axis to the fourth position, and measure the fourth sphere center coordinate P4 = (x4, y4, z4) of the standard sphere at the fourth position, wherein the third sphere center coordinate P3 = (x3, y3, z3) and the fourth sphere center coordinate P4 = (x4, y4, z4) both include coordinate values ​​in the first direction, the second direction and the third direction, and the third position and the fourth position are respectively located at the two farthest points of the standard sphere 20 in the negative direction and the positive direction of the third direction.

[0052] Step S260: extract the coordinate values ​​in the first direction of the third spherical center coordinate P3 = (x3, y3, z3) and the fourth spherical center coordinate P4 = (x4, y4, z4) respectively, and the difference between the two is used to measure the axial deviation of the machine tool rotation axis 10 relative to the reference axis in the third direction.

[0053] Step S280: If the deviation of the machine tool rotary axis 10 in the third direction does not meet the requirement, the machine tool rotary axis 10 is adjusted along the third direction and re-tested until the requirement is met.

[0054] The above process of detecting and adjusting the deviation of the machine tool rotary axis 10 in the third direction is similar to the above process of detecting and adjusting the deviation of the machine tool rotary axis 10 in the second direction, so it is not described in detail. In the embodiment of the present application, only the deviation of the machine tool rotary axis 10 in the second direction or the third direction can be detected and adjusted, and the deviation of the machine tool rotary axis 10 in two directions such as the second direction and the third direction can also be detected and adjusted.

[0055] Optionally, in some embodiments of the present application, the coordinates P of the center of the standard ball at the first position, the second position, the third position or the fourth position are measured. i =(x i ,y i , z i ), wherein i=1, 2, 3, 4, further comprising: driving the probe to contact at least four different position points on the spherical surface of the standard ball 20 located at the position, performing fitting sphere calculation on the three coordinate values ​​of the different position points, obtaining the coordinates of the center of the fitting sphere and using them as the coordinates of the center of the standard ball at the position. Specifically, driving the probe to contact five different position points on the spherical surface of the standard ball 20 located at the position, performing fitting sphere calculation on the three coordinate values ​​of the different position points, wherein the five different position points are evenly distributed on the spherical surface of the standard ball 20.

[0056] See also Figure 2 , Figure 3 , Figure 5 as well as Figure 6 Optionally, in some embodiments of the present application, the machine tool rotary shaft 10 is mounted on the rotary shaft mounting seat 30 through a sleeve, and the rotary shaft mounting seat 30 is provided with a mounting hole for mounting the machine tool rotary shaft 10, and the sleeve is located in the mounting hole, and the machine tool rotary shaft 10 is located in the sleeve and can rotate relative to the sleeve, and one end of the sleeve has a flange structure 40, and the flange structure 40 is fixedly connected to a surface of the rotary shaft mounting seat 30 provided with a mounting hole. Specifically, the motor rotor can drive the machine tool rotary shaft 10 to rotate relative to the sleeve. The flange structure 40 provided at one end of the sleeve is provided with a plurality of evenly distributed screw holes. The sleeve is fixedly connected to the rotary shaft mounting seat 30 by means of connecting members such as screws. It is not difficult to understand that the sleeve and the rotary shaft mounting seat 30 are detachably connected, so that the machine tool rotary shaft 10 and the rotary shaft mounting seat 30 are also detachably connected. It should be pointed out that after the machine tool rotating shaft 10 is installed in the sleeve, it is inspected and debugged so that the axis of the machine tool rotating shaft 10 and the axis of the sleeve meet the coaxiality requirements. Therefore, it can be considered that the axis of the machine tool rotating shaft 10 and the axis of the sleeve are parallel.

[0057] Optionally, in some embodiments of the present application, the installation accuracy detection and adjustment method of the machine tool rotating axis further includes: before the detection and adjustment, fixing the standard ball 20 on the motor rotor or a component rotating with the motor rotor (such as Figure 2 , Figure 3 , Figure 5 as well as Figure 6 ), install the probe on the spindle of the machine tool, install the probe at a certain position of the machine tool and align it with the probe to receive the signal from the probe. Through the above steps, the operator can build a more accurate and efficient detection system before detection and adjustment.

[0058] As mentioned above, after testing, Figure 3 The second position of Figure 2 The difference Δx between the coordinates of the center of the sphere at the first position and the second position may be positive or negative, and Figure 6 The fourth position and Figure 5 The difference Δx between the spherical center coordinates of the third position and the second position may be positive or negative. How to determine the direction in which the axial direction of the machine tool rotating axis 10 is deflected relative to the axial direction of the reference axis based on the positive or negative difference Δx between the spherical center coordinates? Some embodiments of the present application provide a determination method.

[0059] Optionally, in some embodiments of the present application, if the coordinate value of the second spherical center coordinate P2 = (x2, y2, z2) in the first direction is less than the coordinate value of the first spherical center coordinate P1 = (x1, y1, z1) in the first direction, it is determined that the axial positive direction of the machine tool rotary axis 10 forms an acute angle with respect to the positive direction of the second direction; if the opposite is true, it is determined that the axial positive direction of the machine tool rotary axis 10 forms an obtuse angle with respect to the positive direction of the second direction. Please refer to Figure 4 , the coordinate value of the second sphere center coordinate P2 = (x2, y2, z2) in the X-axis direction is greater than the coordinate value of the first sphere center coordinate P1 = (x1, y1, z1) in the first direction. Figure 4 In the figure, the direction indicated by the arrow is the positive direction. Therefore, when the machine tool rotary axis 10 rotates from the first position to the second position, the second spherical center coordinate P2 = (x2, y2, z2) is in front of the first spherical center coordinate P1 = (x1, y1, z1) in the X-axis direction, that is, x2>x1, and the positive direction of the axis A of the machine tool rotary axis 10 is at an obtuse angle to the second direction (that is, the positive direction of the Y-axis). For an analysis of the situation where the coordinate value of the second spherical center coordinate P2 = (x2, y2, z2) in the first direction is less than the coordinate value of the first spherical center coordinate P1 = (x1, y1, z1) in the first direction, please refer to Figure 4 Understanding by analogy.

[0060] Optionally, in some embodiments of the present application, if the coordinate value of the fourth spherical center coordinate P4 = (x4, y4, z4) in the first direction is less than the coordinate value of the third spherical center coordinate P3 = (x3, y3, z3) in the first direction, it is determined that the axial positive direction of the machine tool rotation axis 10 is at an acute angle relative to the positive direction of the third direction; if the opposite is true, it is determined that the axial positive direction of the machine tool rotation axis 10 is at an obtuse angle relative to the positive direction of the third direction. For analysis of the above two situations, please refer to Figure 4 Understanding by analogy.

[0061] Optionally, in some embodiments of the present application, the process of adjusting the rotating axis of the machine tool includes:

[0062] If the deviation of the machine tool rotary axis 10 in the second direction does not meet the requirement, a partial area on the rotary axis mounting seat 30 fixedly connected to the flange structure 40 is scraped, wherein the partial area is a portion of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or,

[0063] If the deviation of the machine tool rotating axis 10 in the third direction does not meet the requirements, the partial area on the rotating axis mounting seat 30 fixedly connected to the flange structure 40 is scraped, wherein the partial area is the part of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the third direction.

[0064] For example, see Figure 4 , the positive direction of the axis of the machine tool rotary shaft 10 forms an obtuse angle with the positive direction of the second direction, and if the obtuse angle is too large, the positive direction of the axis A of the machine tool rotary shaft 10 should be brought closer to the positive direction of the X-axis. Specifically, the operator can scrape the portion corresponding to the positive direction of the second direction in the area fixedly connected to the flange structure 40 on the rotary shaft mounting seat 30, that is, scrape the partial area corresponding to the second position on the rotary shaft mounting seat 30. By scraping, the thickness of the partial area corresponding to the second position is made lower than that of other partial areas, and the sleeve is brought closer to the partial area corresponding to the second position on the rotary shaft mounting seat 30, so that the axial direction of the machine tool rotary shaft 10 swings closer to the positive direction of the reference axis X-axis to reduce the deviation.

[0065] In some application scenarios, it is also necessary to consider adjusting the relative angle between the normal direction of the surface of the rotating shaft mounting seat 30 where the mounting hole is provided and the positive direction of the reference axis.

[0066] Optionally, in some embodiments of the present application, the rotating shaft mounting seat 30 is mounted on the bed of the machine tool, and the rotating shaft mounting seat 30 and the bed are detachably connected; the process of adjusting the rotating shaft of the machine tool includes:

[0067] If the deviation of the machine tool rotary axis 10 in the second direction does not meet the requirement, the partial area where the rotary axis mounting seat 30 is fixedly connected to the bed is scraped or the installation posture of the rotary axis mounting seat 30 on the bed is adjusted, wherein the partial area is the part of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or,

[0068] If the deviation of the machine tool rotating axis 10 in the third direction does not meet the requirements, the partial area where the rotating axis mounting seat 30 is fixedly connected to the bed is scraped or the installation posture of the rotating axis mounting seat 30 on the bed is adjusted, wherein the partial area is the part corresponding to the positive direction or negative direction of the third direction in the area where the two are fixedly connected.

[0069] By scraping the partial area where the rotating axis mounting seat 30 is fixedly connected to the bed or adjusting the mounting posture of the rotating axis mounting seat 30 on the bed, the relative angle between the normal of the surface with the mounting hole of the rotating axis mounting seat 30 and the positive direction of the reference axis can be adjusted, which helps to reduce the deviation between the axial direction of the machine tool rotating axis 10 and the positive direction of the reference axis X-axis.

[0070] In some cases, there is a possibility that the positive axial direction of the machine tool rotary axis 10 is parallel to the positive normal direction of the surface of the rotary axis mounting seat 30 provided with the mounting hole, but the positive normal direction of the surface of the rotary axis mounting seat 30 provided with the mounting hole is not parallel to the positive direction of the reference axis. Therefore, it is necessary to also detect whether there is a deviation between the positive normal direction of the surface of the rotary axis mounting seat 30 provided with the mounting hole and the positive direction of the reference axis.

[0071] Optionally, in some embodiments of the present application, the process of adjusting the rotating axis of the machine tool also includes: detecting whether the deviation between the normal direction of the surface of the rotating axis mounting seat 30 having the mounting hole and the axial direction of the reference axis in the second direction and / or the third direction meets the requirements.

[0072] The above examples are only preferred embodiments of the present application, and certainly cannot be used to limit the scope of rights of the present application. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A method for detecting and adjusting the installation accuracy of a rotating shaft of a machine tool, wherein the rotating shaft of the machine tool is driven to rotate by a motor, characterized in that: A standard ball is installed on the rotor of the motor or a component rotating with the rotor of the motor, and the installation accuracy detection and adjustment method of the rotating axis of the machine tool includes: Rotate the machine tool rotation axis around its own axis to a first position, and measure the first spherical center coordinates of the standard sphere located at the first position; Rotate the machine tool rotation axis around its own axis to a second position, and measure the second spherical center coordinates of the standard sphere located at the second position, wherein the first spherical center coordinates and the second spherical center coordinates both include coordinate values ​​in a first direction, a second direction, and a third direction, the first direction is the axial direction of the reference axis, the first direction, the second direction, and the third direction are perpendicular to each other, and the first position and the second position are located at the two farthest points of the standard sphere in the negative direction and the positive direction of the second direction, respectively; Extracting the coordinate values ​​in the first direction from the first spherical center coordinates and the second spherical center coordinates respectively, and the difference between the two is used to measure the deviation of the axial direction of the machine tool rotation axis relative to the reference axis in the second direction; If the deviation of the machine tool rotation axis in the second direction does not meet the requirement, the machine tool rotation axis is adjusted along the second direction and re-detected until the requirement is met.

2. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 1, characterized in that: If the coordinate value of the second sphere center coordinate in the first direction is smaller than the coordinate value of the first sphere center coordinate in the first direction, it is determined that the axial positive direction of the machine tool rotation axis forms an acute angle with respect to the positive direction of the second direction; if the opposite is true, it is determined that the axial positive direction of the machine tool rotation axis forms an obtuse angle with respect to the positive direction of the second direction.

3. The installation accuracy detection and adjustment method of a machine tool rotating axis according to claim 1, characterized in that: Rotate the machine tool rotation axis around its own axis to a third position, and measure the third spherical center coordinates of the standard sphere located at the third position; Rotate the machine tool rotation axis around its own axis to a fourth position, and measure the fourth spherical center coordinates of the standard sphere located at the fourth position, wherein the third spherical center coordinates and the fourth spherical center coordinates both include coordinate values ​​in the first direction, the second direction and the third direction, and the third position and the fourth position are located at the two farthest points of the standard sphere in the negative direction and the positive direction of the third direction, respectively; Extracting the coordinate values ​​in the first direction from the third spherical center coordinates and the fourth spherical center coordinates respectively, and the difference between the two is used to measure the deviation of the axial direction of the machine tool rotation axis relative to the reference axis in the third direction; If the deviation of the machine tool rotation axis in the third direction does not meet the requirement, the machine tool rotation axis is adjusted along the third direction and re-detected until the requirement is met.

4. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 3, characterized in that: If the coordinate value of the fourth sphere center coordinate in the first direction is less than the coordinate value of the third sphere center coordinate in the first direction, it is determined that the axial positive direction of the machine tool rotation axis forms an acute angle with respect to the positive direction of the third direction; if it is the opposite, it is determined that the axial positive direction of the machine tool rotation axis forms an obtuse angle with respect to the positive direction of the third direction.

5. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 3, characterized in that: The machine tool rotating shaft is installed on the rotating shaft mounting seat through a sleeve. The rotating shaft mounting seat is provided with a mounting hole for mounting the machine tool rotating shaft. The sleeve is located in the mounting hole. The machine tool rotating shaft is located in the sleeve and can rotate relative to the sleeve. One end of the sleeve has a flange structure, and the flange structure is fixedly connected to a surface of the rotating shaft mounting seat provided with the mounting hole.

6. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 5, characterized in that: The process of adjusting the rotary axis of the machine tool includes: If the deviation of the machine tool rotary axis in the second direction does not meet the requirement, a partial area on the rotary axis mounting seat fixedly connected to the flange structure is scraped, wherein the partial area is a portion of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or, If the deviation of the machine tool rotating axis in the third direction does not meet the requirements, the partial area on the rotating axis mounting seat that is fixedly connected to the flange structure is scraped, wherein the partial area is the part of the area where the two are fixedly connected that corresponds to the positive direction or negative direction of the third direction.

7. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 5, characterized in that: The rotating shaft mounting seat is mounted on the bed of the machine tool, and the rotating shaft mounting seat and the bed are detachably connected; the process of adjusting the rotating shaft of the machine tool includes: If the deviation of the machine tool rotary axis in the second direction does not meet the requirement, the partial area where the rotary axis mounting seat is fixedly connected to the bed is scraped or the mounting posture of the rotary axis mounting seat on the bed is adjusted, wherein the partial area is the part of the area where the two are fixedly connected corresponding to the positive direction or negative direction of the second direction; and / or, If the deviation of the machine tool rotating axis in the third direction does not meet the requirements, the partial area where the rotating axis mounting seat is fixedly connected to the bed is scraped or the installation posture of the rotating axis mounting seat on the bed is adjusted, wherein the partial area is the part corresponding to the positive direction or negative direction of the third direction in the area where the two are fixedly connected.

8. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 7, characterized in that: The process of adjusting the machine tool rotary axis also includes: detecting whether the deviation between the normal direction of the surface of the rotary axis mounting seat having the mounting hole and the axial direction of the reference axis in the second direction and / or the third direction meets the requirements.

9. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to any one of claims 1 to 8, characterized in that: The installation accuracy detection and adjustment method of the machine tool rotating axis also includes: fixing the standard ball on the motor rotor or a component rotating with the motor rotor through a connecting seat, installing a probe on the main shaft of the machine tool, and installing a probe at a certain position of the machine tool and aligning it with the probe to receive the signal of the probe.

10. The method for detecting and adjusting the installation accuracy of a machine tool rotary axis according to claim 9, characterized in that: Determining the coordinates of the center of the standard ball at the first position, the second position, the third position or the fourth position further includes: driving the probe to contact at least four different position points on the spherical surface of the standard ball at the position, performing fitting sphere calculation on the three coordinate values ​​of the obtained different position points, obtaining the coordinates of the center of the fitting sphere and using them as the coordinates of the center of the standard ball at the position.

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