WO2022067594A1

WO2022067594A1 - Five-axis linkage numerical control machine tool rotation axis position error detection method and device

Info

Publication number: WO2022067594A1
Application number: PCT/CN2020/119140
Authority: WO
Inventors: 朱绍维; 陶文坚; 蒋云峰; 张云; 宋志勇; 楚王伟; 王强军; 贺毅; 罗兴华; 董光亮
Original assignee: 成都飞机工业（集团）有限责任公司
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-07

Abstract

A machine tool rotation axis position error detection device, comprising a support (11) and three displacement sensors (12). The three displacement sensors (12) are separately mounted on the support (11); a direction line (13) of a third displacement sensor (12) passes through the intersection point (14) of direction lines (13) of the first two displacement sensors (12), and is located outside the plane defined by the direction lines (13) of the first two displacement sensors (12). The present invention aims at solving the problem in the prior art of complex use and long detection time during machine tool rotation axis error detection, and can conveniently and quickly implement rotation axis error detection. Also provided are a machine tool rotation axis position error detection method and a five-axis linkage numerical control machine tool rotation axis position error detection method.

Description

The detection method and detection device for the position error of the rotation axis of the five-axis CNC machine tool

technical field

The invention relates to the field of machine tool detection, in particular, to a method for detecting a position error of a rotation axis of a machine tool and a method for detecting a position error of the rotation axis of a five-axis linkage numerically controlled machine tool.

Background technique

The development of some structural parts, such as aircraft structural parts towards large-scale, integrated and high-precision trends, puts forward higher requirements for the accuracy of five-axis CNC machine tools.

As a symbol of five-axis machine tools different from three-axis machine tools, the rotary axis has a direct impact on the machining accuracy of parts. Devices and methods for detecting the accuracy of rotating shafts are also constantly being developed and improved.

At present, there are many devices and methods for the accuracy inspection of the rotary axis of CNC machine tools, among which the most widely used are mainly the detection method of the pendulum instrument, the detection method of the ballbar instrument, and the detection method of the RTCP ball head. However, these detection methods all have problems such as complicated installation of detection instruments and long detection time.

SUMMARY OF THE INVENTION

The present invention aims to provide a device for detecting the position error of the rotational axis of a machine tool, so as to solve the problems in the prior art that the error detection of the rotational axis of the machine tool is complicated and time-consuming.

Embodiments of the present invention are implemented as follows:

A machine tool rotation axis position error detection device includes a support and three displacement sensors. The three displacement sensors are respectively mounted on the support; the direction line of the third displacement sensor passes through the intersection of the direction lines of the first two displacement sensors and is located in the direction of the first two displacement sensors outside the plane bounded by the line.

When the machine tool rotation axis position error detection device in this scheme is used, its support is fixedly arranged on the machine tool, and a ball-head detection rod with a spherical end is connected to the machine tool spindle, so that the machine tool spindle can perform the detection including the rotation of the rotation axis to be measured. For compound motion, the displacement value of the sphere corresponding to the direction line of each displacement sensor is measured through three displacement sensors, and the change in the displacement of the sphere center is calculated by the magnitude of the displacement value or from the three displacement values as an index to evaluate the error of the rotation axis .

Therefore, the device for detecting the position error of the rotational axis of the machine tool in this solution can conveniently and quickly realize the detection of the error of the rotational axis.

In one embodiment:

The three displacement sensors are all contact displacement sensors, and the distances from the probes of the three displacement sensors to the intersection point are equal.

In one embodiment:

The three displacement sensors are all contact displacement sensors, and the probe heads of the three displacement sensors have contact surfaces, the three contact surfaces are respectively inclined upward, and can support a sphere on the three, and make the contact surface face the sphere The direction of the supporting force passes through the center of the sphere.

In one embodiment:

The included angles between the direction lines of the three displacement sensors are equal to each other.

In one embodiment:

The support has three mounting surfaces distributed circumferentially around a central axis, and the three displacement sensors are respectively mounted on the three mounting surfaces.

In one embodiment:

The upper part of the support is set as a boss body that is large at the bottom and small at the top. The trapezoidal surfaces are alternately connected and enclosed, and the three rectangular surfaces are respectively used as the three mounting surfaces.

In one embodiment:

A sensor seat is respectively installed on each installation surface, and the displacement sensor is connected to the displacement sensor seat.

In one embodiment:

The bottom surface of the support is perpendicular to the central axis.

In one embodiment:

The support includes a seat and a cover plate; the displacement sensor is arranged on the seat;

The seat piece has an opening cavity facing downward, the cover plate is connected to the lower end of the seat piece, and closes the opening cavity;

A data receiving and processing system connected to each of the displacement sensors is arranged in the open mouth.

In one embodiment:

The machine tool rotation axis position error detection device further includes a positioning mounting seat; the lower end surface of the positioning mounting seat is provided with a mounting portion for positioning and mounting on the machine tool, and the upper end surface is provided with a bearing and positioning and positioning of the support. Fixed positioning connection structure.

In one embodiment:

The machine tool rotation axis position error detection device further includes a ball head inspection rod; one end of the ball head inspection rod is a connecting part for connecting the machine tool spindle, and the other end is a spherical ball head end.

In one embodiment:

The machine tool rotation axis refers to a five-axis linkage CNC machine tool.

An embodiment of the present invention further provides a device for detecting a position error of a rotational axis of a machine tool, which includes three displacement sensors whose relative positions are fixed. The direction line of the third displacement sensor passes through the intersection of the direction lines of the first two displacement sensors, and is located outside the plane defined by the direction lines of the first two displacement sensors.

The embodiment of the present invention also provides a method for detecting the position error of the rotation axis of a five-axis linkage CNC machine tool, which is characterized in that, based on the aforementioned device for detecting the position error of the rotation axis of the machine tool, the detection method includes the following steps:

The support is fixed on the machine tool, and a ball-head inspection rod with a sphere at the end is connected to the machine tool spindle, so that the machine tool spindle moves in the RTCP function mode, and the displacement of the sphere corresponding to the direction line of each displacement sensor is measured through three displacement sensors. value, and the fluctuation of the displacement of the sphere center calculated by the three displacement values is used as an index to evaluate the error of the rotation axis.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings mentioned in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be It is regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained from these drawings without any creative effort.

FIG. 1 shows a three-dimensional view of a machine tool rotation axis position error detection device in an embodiment of the present invention

FIG. 2 is a first perspective view of FIG. 1 (the connecting part of the ball-end inspection rod is additionally shown in the figure);

Fig. 3 is the second perspective view of Fig. 1;

FIG. 4 shows a top view of a machine tool rotation axis position error detection device in an embodiment of the present invention;

Fig. 5 shows a top view of the machine tool rotation axis position error detection device in the embodiment of the present invention (the cover is hidden);

Figure 6 shows a top view of the support in the embodiment of the present invention;

[Correction 20.10.2020 under Rule 91]
Figure 7 shows a three-dimensional view of the cover plate;
Figure 8 shows a bottom view of the cover plate;

[Correction 20.10.2020 under Rule 91]
Figure 9 shows a three-dimensional view of the positioning mount.

Icon: 10-machine tool rotation axis position error detection device; 11-support; 12-displacement sensor; 13-direction line; 14-intersection; 15-probe; 16-contact surface; 17-central axis; 18-installation surface ;19-boss body;20-rectangular surface;21- trapezoidal surface;22-sensor seat;23-threaded hole;24-bottom surface;25-seat piece;26-cover plate;27-opening mouth;28-data receiving Processing system; 29- countersunk head screw hole; 31- sensor connector; 32- power amplifier; 33- communication module; 34- rechargeable battery; 35- hole; 36- hollow prism; 37- network interface; 38- charging Interface; 39-display screen; 40-positioning mounting seat; 41-installation part; 42-positioning connection structure; 43-disc body; 44-positioning bump; Slot; 48-through hole; 49-threaded connection hole; 51-ball head inspection rod; 52-connection part; 53-sphere.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear The azimuth or positional relationship indicated by "" etc. is based on the azimuth or positional relationship shown in the attached drawings, or the azimuth or positional relationship that the product of the invention is usually placed in use, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, if the terms "first", "second" and the like appear in the description of the present invention, they are only used to distinguish the description, and should not be construed as indicating or implying relative importance.

Furthermore, the appearance of the terms "horizontal", "vertical" and the like in the description of the present invention does not mean that the component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed The connection can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example 1

Referring to FIG. 1 to FIG. 5 , the present embodiment proposes a device 10 for detecting a position error of the rotational axis of a machine tool, which includes a support 11 and three displacement sensors 12 . The three displacement sensors 12 are respectively mounted on the support 11 . The direction line 13 of the third displacement sensor 12 passes through the intersection 14 of the direction lines 13 of the first two displacement sensors 12 and is located outside the plane defined by the direction lines 13 of the first two displacement sensors 12 .

Optionally, the apparatus 10 for detecting the position error of the rotational axis of the machine tool described in this embodiment is additionally configured with a ball-end detection rod 51 as an accessory. One end of the ball head inspection rod 51 is a connecting portion 52 for connecting to the main shaft of the machine tool, and the other end is a spherical sphere 53 . Of course, the ball head inspection rod 51 may not be included in the device, but obtained by other means before detection.

When the machine tool rotation axis position error detection device 10 in this scheme is in use, its support 11 is fixedly arranged on the machine tool, and a ball head detection rod 51 with a spherical end is connected to the machine tool spindle, so that the machine tool spindle can rotate including the rotation to be measured. The compound motion of shaft rotation, the three displacement sensors 12 are used to measure the displacement value of the sphere corresponding to the direction line 13 of each displacement sensor 12, and the change in the displacement of the sphere center is calculated by the magnitude of the displacement value or the three displacement values as An index for evaluating the error of the rotation axis.

The aforementioned three direction lines 13 intersect at the same point (ie, the aforementioned intersection point 14 ), and in the initial state, the intersection point 14 coincides with the center of the sphere 53 to be detected.

In this embodiment, the three displacement sensors 12 are all contact displacement sensors 12 , and the distances from the probes 15 of the three displacement sensors 12 to the intersection 14 are equal. Optionally, the probes 15 of the three displacement sensors 12 have contact surfaces 16, and the three contact surfaces 16 are inclined upward respectively, and can support a sphere on the three, and make the contact surface 16 support the sphere with the same force. The direction goes through the center of the sphere. For example, the contact surface 16 may be a spherical arc surface or a flat surface, and the sphere is tangent to each contact surface 16 when supported on the three.

In this embodiment, optionally, the included angles between the direction lines 13 of the three displacement sensors 12 are equal to each other. In this way, the included angles between the projection lines of the three displacement sensors 12 on the plane are all 120°.

Referring to FIG. 6 , the support 11 has three mounting surfaces 18 circumferentially distributed around a central axis 17 , and the three displacement sensors 12 are respectively mounted on the three mounting surfaces 18 . Generally, the central axis 17 can be set as the central axis 17 of the whole support 11 . Optionally, the three installation surfaces 18 are also distributed evenly in the circumferential direction with an included angle of 120°, so as to adapt to the installation of the displacement sensor 12 .

In this embodiment, optionally, the upper part of the support 11 is configured as a boss body 19 with a large bottom and a small top. It is alternately connected and enclosed with three trapezoidal surfaces 21 that are large at the bottom and small at the top and whose upper ends are inclined toward the direction of the central axis 17 . The three rectangular surfaces 20 are used as the three mounting surfaces 18 respectively. In this way, the direction lines 13 of the displacement sensor 12 installed on the displacement sensor 12 can easily intersect above the three, and the probes 15 of the three can form three supporting points, which cooperate to support the sphere.

The direction line 13 of the displacement sensor 12 in this embodiment refers to the straight line where the extension and contraction direction of the probe 15 of the displacement sensor 12 is located. geometric center axis.

In this embodiment, the displacement sensor 12 may be directly fixed on the mounting surface 18 , or a sensor seat 22 may be installed on each mounting surface 18 as in the present embodiment, and the displacement sensor 12 is connected to the displacement sensor 12 The way of fixing the support 11 only needs to satisfy the aforementioned restriction conditions on the direction line 13 of the installed displacement sensor 12 . The mounting method of the sensor seat 22 on the mounting surface 18 may be as follows: threaded holes 23 are provided on the mounting surface 18 , and the sensor seat 22 is locked and fixed on the mounting surface 18 through the cooperation of the screws and the threaded holes 23 .

In this embodiment, in order to ensure that the center axis 17 of the support 11 is vertical when it is normally laid flat, the bottom surface 24 of the support 11 is set to be perpendicular to the center axis 17 . In this way, only when the support 11 is supported on the water platform with its bottom surface 24 in use, the verticality of the central axis 17 can be ensured, and preparations for subsequent detection can be made.

Referring to FIG. 5 and FIG. 7 , the support 11 includes a seat 25 and a cover plate 26 , and the displacement sensor 12 is disposed on the seat 25 . The seat member 25 has an opening cavity 27 facing downward. The cover plate 26 is connected to the lower end of the seat member 25 and closes the opening cavity 27 . A data receiving and processing system 28 connected to each of the displacement sensors 12 is arranged in the opening cavity 27 .

The aforementioned seat member 25 and the cover plate 26 can be detachably connected to facilitate opening or closing of the opening cavity 27 . For example, the connection between the seat piece 25 and the cover plate 26 can be realized by means of screw connection, the cover plate 26 is provided with countersunk head screw holes 29, and the lower end surface of the seat piece 25 is provided with a connection hole corresponding to the countersunk head screw hole 29 (not shown in the figure). out).

The data receiving and processing system 28 can adopt a common sensor data receiving and processing scheme. For example, in this embodiment, a sensor connector 31 , a power amplifier 32 , a communication module 33 and a rechargeable battery 34 are arranged in the opening 27 . The wiring of the displacement sensor 12 penetrates into the opening cavity 27 through the opening 35 on the mounting surface 18, and is connected to the sensor connector 31; the power amplifier 32 is used to amplify the received displacement signal, and the communication module 33 is used to receive the received displacement signal. The received data is transmitted to the upper computer for processing, and the rechargeable battery 34 supplies power for the entire system. Optionally, in this embodiment, a hollow prism body 36 is provided below the boss body 19 of the support 11 (the boss body 19 may also be an internal hollow structure), the sensor connector 31, the power amplifier 32, the communication module 33 and the optional The rechargeable battery 34 and the like can be reasonably installed on the inner wall surface of the hollow prism body 36, and a network interface 37 can be opened on the side wall of the hollow prism body 36 as an external interface of the network module; of course, it can also be used to realize wireless communication. Similarly, a charging interface 38 for charging the rechargeable battery 34 can be provided on the side wall of the hollow prism body 36; and a charging interface 38 for displaying the rechargeable battery can also be provided on the side wall of the hollow prism body 36 34 The display screen 39 of the electric power is specifically suitable for realizing the display of electric power, which is in the prior art, and will not be repeated here.

[Correction 20.10.2020 under Rule 91]
Referring to FIG. 9, in this embodiment, optionally, the machine tool rotation axis position error detection device 10 further includes a positioning mounting seat 40; the lower end surface of the positioning mounting seat 40 is provided with a mounting for positioning and mounting on the machine tool The upper end surface is provided with a positioning connection structure 42 for carrying and positioning and fixing the support 11 .

[Correction 20.10.2020 under Rule 91]
In this embodiment, optionally, the positioning mounting base 40 includes a middle disc body 43, and a positioning bump 44 is provided at the middle position of the upper end surface. The positioning bump 44 includes a convex column 45 concentric with the disc body 43 and a Two flanges 46 on both sides of the protruding post 45 . A positioning groove 47 corresponding to the positioning projection 44 may be provided on the bottom surface 24 of the support 11 (see FIG. 8 ). In this way, the positioning between the support 11 and the positioning mounting seat 40 can be achieved only by aligning the positioning projections 44 and the positioning grooves 47 . The connection between the support 11 and the positioning mounting base 40 can be realized in the form of screw connection. For example, a plurality of through holes 48 are distributed on the disc body 43, and corresponding screw connection holes 49 are set on the bottom surface 24 of the support 11. , in this way, the connection between the two can be realized by screws. The mounting portion 41 may be one or more connecting pins disposed on the lower end surface of the disc body 43 .

The device 10 for detecting the position error of the rotational axis of the machine tool in this embodiment can be applied to a five-axis linkage numerically controlled machine tool. The machine tool has high requirements on the accuracy of the rotating axis, and requires more and higher-precision inspections.

Embodiment 2

The embodiment of the present invention also provides a machine tool rotation axis position error detection device 10. Compared with the first embodiment, the only difference is that the use of manufacturing is not limited. 12 for fixed installation.

Embodiment 3

The embodiment of the present invention also provides a machine tool rotation axis position error detection device 10. Compared with the first embodiment, the difference is that in addition to the three displacement sensors 12 in the first embodiment, additional displacement sensors 12 are added in different directions. Abut the sphere and measure the displacement value in this direction to assist in detecting the displacement of the center of the sphere.

Embodiment 4

The embodiment of the present invention also provides a method for detecting the position error of the rotation axis of a five-axis linkage CNC machine tool, which is based on the device 10 for detecting the position error of the rotation axis of the machine tool in the first embodiment, and the detection method includes the following steps:

The support 11 is fixed on the machine tool, and a ball-head inspection rod 51 with a spherical end is connected to the machine tool spindle, so that the machine tool spindle moves in the RTCP function mode, and the three displacement sensors 12 are used to measure the direction of the sphere corresponding to each displacement sensor 12 The displacement value in the direction of line 13, and the fluctuation of the displacement of the sphere center calculated from the three displacement values are used as an index for evaluating the error of the rotation axis.

According to the displacement values measured by the three displacement sensors 12 , the variation value of the ball center of the ball nose rod 51 can be determined, and the position error parameter of the rotation axis can be evaluated by the variation value of the ball center. Wherein, there is a functional relationship between the variation value of the sphere center and the displacement values measured by the three displacement sensors 12 , that is, the displacement values measured by each group of three displacement sensors 12 . The specific relationship can be obtained through geometric calculation, and will not be repeated here.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Industrial Applicability

The machine tool rotation axis position error detection device in this scheme can easily and quickly measure the displacement value of the sphere corresponding to the direction line of each displacement sensor through the setting of the support and three specially configured displacement sensors. The three displacement values are used to calculate the change of the displacement of the sphere center as an index for evaluating the error of the rotation axis, which has industrial practicability.

Claims

A machine tool rotation axis position error detection device is characterized by:

Including support and three displacement sensors;

The three displacement sensors are respectively mounted on the support; the direction line of the third displacement sensor passes through the intersection of the direction lines of the first two displacement sensors and is located in the direction of the first two displacement sensors outside the plane bounded by the line.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The three displacement sensors are all contact displacement sensors, and the distances from the probes of the three displacement sensors to the intersection point are equal.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The three displacement sensors are all contact displacement sensors, and the probe heads of the three displacement sensors have contact surfaces, the three contact surfaces are respectively inclined upward, and can support a sphere on the three, and make the contact surface face the sphere The direction of the supporting force passes through the center of the sphere.
The device for detecting the position error of the rotational axis of a machine tool according to any one of claims 1-3, wherein:

The support has three mounting surfaces distributed circumferentially around a central axis, and the three displacement sensors are respectively mounted on the three mounting surfaces.
The machine tool rotation axis position error detection device according to claim 4 is characterized in that:

The upper part of the support is set as a boss body that is large at the bottom and small at the top. The trapezoidal surfaces are alternately connected and enclosed, and the three rectangular surfaces are respectively used as the three mounting surfaces.
The machine tool rotation axis position error detection device according to claim 4 is characterized in that:

A sensor seat is respectively installed on each installation surface, and the displacement sensor is connected to the displacement sensor seat.
The machine tool rotation axis position error detection device according to claim 4 is characterized in that:

The bottom surface of the support is perpendicular to the central axis.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The support includes a seat and a cover plate; the displacement sensor is arranged on the seat;

The seat piece has an opening cavity facing downward, the cover plate is connected to the lower end of the seat piece, and closes the opening cavity;

A data receiving and processing system connected to each of the displacement sensors is arranged in the open mouth.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The machine tool rotation axis position error detection device further includes a positioning mounting seat; the lower end surface of the positioning mounting seat is provided with a mounting portion for positioning and mounting on the machine tool, and the upper end surface is provided with a bearing and positioning and positioning of the support. Fixed positioning connection structure.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The included angles between the direction lines of the three displacement sensors are equal to each other.
The device for detecting the position error of the rotational axis of a machine tool according to any one of claims 1 to 10, wherein:

The machine tool rotation axis refers to a five-axis linkage CNC machine tool.
The machine tool rotation axis position error detection device according to claim 1 is characterized in that:

The machine tool rotation axis position error detection device further comprises a ball head inspection rod; one end of the ball head inspection rod is a connecting portion for connecting the machine tool spindle, and the other end is a spherical ball head end.
A machine tool rotation axis position error detection device is characterized by:

Including three displacement sensors with fixed relative positions;

The direction line of the third displacement sensor passes through the intersection of the direction lines of the first two displacement sensors, and is located outside the plane defined by the direction lines of the first two displacement sensors.
A machine tool rotation axis position error detection device is characterized by:

Including seat, cover, positioning mounting seat, sensor seat, data receiving and processing system and three displacement sensors;

The seat is a shell-like wall structure with an open lower end, and an opening cavity is defined inside, and the cover plate is detachably connected to the lower opening of the seat;

The lower part of the seat is a hollow prism body with a hexagonal cross-section, the upper part is a boss body connected to the hollow prism body, the boss body is a structure with a large lower part and a small upper part, and its side faces are formed by three upper ends facing the hollow prism body. A rectangular surface inclined in the direction of the central axis and three trapezoidal surfaces with a large lower part and a small upper end and whose upper end is inclined toward the direction of the central axis are alternately connected and enclosed, and the three rectangular surfaces are respectively used as three installation surfaces;

The three displacement sensors are respectively connected to the corresponding installation surfaces through the sensor base; the probes of the three displacement sensors are inclined upward in different directions, and the ends of the three probes are close to each other and can jointly support a sphere and make the three displacement sensors. The direction lines of the sphere pass through the center of the sphere;

The data receiving and processing system includes a sensor connector, a power amplifier, a communication module and a rechargeable battery connected to the inner surface of the opening; the wiring of the displacement sensor penetrates into the opening through the opening on the installation surface, and is connected to the sensor connector ; The power amplifier is used to amplify the received displacement signal, the communication module is used to transmit the received data to the upper computer for processing, and the rechargeable battery supplies power for the whole system; As the external interface of the network module; a charging interface for charging the rechargeable battery and a display screen for displaying the power of the rechargeable battery are also provided on the side wall of the hollow prism;

The positioning mounting seat includes a middle disc body, and a positioning bump is arranged at the middle position of the upper end surface of the positioning bump, and the positioning bump includes a convex column concentric with the disc body and two convex edges arranged on both sides of the convex column; The bottom surface of the seat is provided with a positioning groove corresponding to the positioning projection; the detachable connection is realized between the support and the disk body of the positioning mounting seat by means of screw connection; the lower end of the disk body is provided with a mounting part, and the installation The part is one or more connecting pins arranged on the lower end face of the disc body.
A five-axis linkage numerical control machine tool rotation axis position error detection method, characterized in that, based on the machine tool rotation axis position error detection device according to claim 11, the detection method comprises the following steps:

The support is fixed on the machine tool, and a ball-head inspection rod with a spherical end is connected to the machine tool spindle, so that the machine tool spindle moves in the RTCP function mode, and the displacement of the sphere corresponding to the direction line of each displacement sensor is measured through three displacement sensors. value, and the fluctuation of the displacement of the sphere center calculated by the three displacement values is used as an index to evaluate the error of the rotation axis.