Laser interferometer and ball bar combined motion precision calibration device

Abstract

The utility model provides a laser interferometer and ball bar composite motion precision calibration device, which comprises a machine tool shell used for installing a ball bar base and a laser interferometer shell and a workbench, a calibration assembly is arranged on the surface of one side of the machine tool shell, one end of the calibration assembly is connected with the laser interferometer shell, the workbench is arranged in the machine tool shell, and the other end of the calibration assembly is connected with the laser interferometer shell. A ball rod base is installed on the upper surface of the workbench, a center ball is arranged at the upper end of the ball rod base, a reflecting film is plated on the surface of the center ball, and the laser interferometer shell corresponds to the center ball. The sensor ball is used for detecting multi-axis linkage track errors, then the calibration assembly drives the laser interferometer shell to move to adjust the horizontal position of the laser interferometer, it is ensured that laser beams can enter the reflecting film of the center ball, the reflecting film is integrated on the center ball, and space interference between the laser interferometer and the ball rod instrument can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to diagnostic instrument technical field, concretely relates to a kind of motion precision calibration device of laser interferometer and ball bar composite. BACKGROUND

[0002] The motion precision calibration device of laser interferometer and ball bar composite is an integrated device combining two high-precision measurement technologies (laser interferometer and ball bar), mainly used for comprehensive detection and calibration of the motion precision of numerical control machine tools, robots, precision motion platforms and other equipment. Its core goal is to utilize the advantages of both technologies simultaneously, achieve multi-dimensional, high-precision error measurement and compensation, and improve the overall performance of the equipment. However, most of the motion precision calibration devices of laser interferometer and ball bar composite currently available have the laser interferometer mirror and the ball bar installed separately, which poses a physical interference risk to the optical path and the ball bar motion path, and poor environmental adaptability. SUMMARY

[0003] The utility model provides a kind of motion precision calibration device of laser interferometer and ball bar composite to solve the problems presented in the background art.

[0004] The specific technical solutions are as follows:

[0005] A kind of motion precision calibration device of laser interferometer and ball bar composite, including the machine tool shell and workbench for installing ball bar base and laser interferometer shell, the calibration assembly is arranged on one side surface of the machine tool shell, the laser interferometer shell is connected to one end of the calibration assembly, the workbench is arranged in the machine tool shell, the ball bar base is installed on the upper surface of the workbench, the center ball is arranged on the upper end of the ball bar base, the reflective film is plated on the surface of the center ball, and the laser interferometer shell is arranged corresponding to the center of the center ball.

[0006] As a preferred embodiment of the utility model, the center ball is connected to the ball bar sensor at one end, the sensor ball is arranged at one end of the ball bar sensor, and the sensor ball is connected to the machine tool spindle for motion precision calibration.

[0007] As a preferred embodiment of the utility model, the calibration assembly includes a fixed plate, the fixed plate is fixedly installed on one side of the machine tool shell, the rotating shaft is rotatably installed on the upper surface of the fixed plate, the swing rod is rotatably connected to the upper surface of the rotating shaft, the No. 1 motor is arranged on the lower surface of the fixed plate, and the output shaft of the No. 1 motor is connected to one end of the lower surface of the rotating shaft.

[0008] As a preferred scheme of the utility model, one end of the swing rod is slidably connected with a circular ring rod, the other end of the circular ring rod is fixedly installed on one end of the machine tool shell, a rotating shaft is rotatably installed on one end of the upper surface of the swing rod, the laser interferometer shell is rotatably connected to one end of the upper surface of the rotating shaft, and the swing rod can swing along the circular ring rod by rotating the rotating shaft.

[0009] As a preferred scheme of the utility model, a bearing plate is fixedly installed on one end of the lower surface of the swing rod, a No.

[0010] As a preferred scheme of the utility model, the first gear is meshingly connected with a second gear at one end, a transmission rod is fixedly installed on the upper surface of the second gear, and the transmission rod is connected to one end of the lower surface of the rotating shaft at one end of the swing rod.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model provides a motion precision calibration device of laser interferometer and ball bar compound, through the design of laser interferometer shell, ball bar base, center ball and calibration assembly, the laser interferometer shell is used for measuring the positioning error, straightness, angle deviation of machine tool linear shaft, the sensor ball is used for detecting multi-axis linkage track error, then the calibration assembly drives the laser interferometer shell to move and adjusts the horizontal position of the laser interferometer, ensures that the laser beam can be incident on the reflecting film of the center ball, through the reflecting film integrated in the center ball, can avoid the space interference of laser interferometer and ball bar, makes it better cooperation, light is reflected back to the laser interferometer, through the analysis of laser interference, the displacement, straightness, perpendicularity of machine tool moving parts in different directions and other precision parameters can be measured, improves the precision of compound measurement, improves the comprehensiveness and accuracy of measurement, and can improve its environmental applicability, reduces the problem that laser reflector and ball bar need to be installed separately, and the light path is blocked by the ball bar.

[0013] 2. The utility model provides a motion precision calibration device of laser interferometer and ball bar compound, through the design of rotating shaft, circular ring rod, rotating shaft, first gear, No. 1 motor drives the rotating shaft, and then drives the swing rod to swing left and right, adjusts the horizontal position of the laser interferometer shell, when the swing rod rotates, it can only swing around the fixed point of the rotating shaft and the circular ring rod, can play the positioning and guiding role, guarantees the stability and accuracy of swing rod movement, then No. 2 motor drives the first gear, the first gear is engaged with the second gear, thereby driving the second gear to rotate, the transmission rod on the second gear is connected to the rotating shaft through the swing rod, so that the rotating shaft rotates, and then drives the laser interferometer shell connected with the rotating shaft to rotate, realizes the angle adjustment of the laser interferometer, reduces the interference of external factors on the measurement result, thereby improves the precision and reliability of measurement. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The whole structure schematic diagram of the motion precision calibration device combined with the laser interferometer and the ball bar is provided for an embodiment of the present application;

[0015] Figure 2 The calibration assembly structure schematic diagram of the motion precision calibration device combined with the laser interferometer and the ball bar is provided for an embodiment of the present application;

[0016] Figure 3 The annular rod structure schematic diagram of the motion precision calibration device combined with the laser interferometer and the ball bar is provided for an embodiment of the present application;

[0017] Figure 4 The first gear structure schematic diagram of the motion precision calibration device combined with the laser interferometer and the ball bar is provided for an embodiment of the present application.

[0018] In the drawings:

[0019] 1, machine tool shell; 101, workbench;

[0020] 2, ball bar base; 201, center ball; 202, ball bar sensor; 203, sensor ball; 204, laser interferometer shell;

[0021] 3, calibration assembly; 301, connecting plate; 302, No. 1 motor; 303, annular rod; 304, swing rod; 305, rotating shaft; 306, bearing plate; 307, rotating shaft; 308, No. 2 motor; 309, first gear; 310, second gear; 311, transmission rod. DETAILED DESCRIPTION

[0022] The technical scheme of the present application will be further illustrated by specific embodiments in combination with the drawings.

[0023] Among them, the drawings are only used for example explanation, and the representation is only a schematic diagram, not a real object diagram, and cannot be understood as a limitation of the present patent; in order to better illustrate the embodiments of the present application, some components of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0024] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] The motion accuracy calibration device combining a laser interferometer and a ballbar provided in this embodiment, such as Figures 1-4 As shown, the machine tool includes a machine tool housing 1 and a worktable 101 for mounting a ballbar base 2 and a laser interferometer housing 204. A calibration component 3 is provided on one side surface of the machine tool housing 1, with one end of the calibration component 3 connected to the laser interferometer housing 204. The worktable 101 is located inside the machine tool housing 1, and the ballbar base 2 is mounted on its upper surface. A central ball 201 is located at the upper end of the ballbar base 2, and the surface of the central ball 201 is coated with a reflective film. The laser interferometer housing 204 is positioned correspondingly to the center of the central ball 201. A ballbar sensor 202 is connected to one end of the central ball 201, and a sensor ball 203 is located at one end of the ballbar sensor 202. The sensor ball 203 is connected to the machine tool spindle for motion accuracy calibration.

[0028] Through the design of the laser interferometer shell 204, the ball bar base 2, the center ball 201 and the calibration assembly 3, the laser interferometer shell 204 is used for measuring the positioning error, straightness and angle deviation of the linear axis of the machine tool, the sensor ball 203 is used for detecting the multi-axis linkage trajectory error, then the calibration assembly 3 drives the laser interferometer shell 204 to move to adjust the horizontal position of the laser interferometer, so as to ensure that the laser beam can be incident on the reflecting film of the center ball 201, and through the reflecting film integrated in the center ball 201, the spatial interference between the laser interferometer and the ball bar can be avoided, so that they can be better used together, the light is reflected back to the laser interferometer, and through the analysis of the laser interference, the displacement, straightness, perpendicularity and other precision parameters of the machine tool moving parts in different directions can be measured, the composite measurement is improved, the precision is improved, the comprehensiveness and accuracy of the measurement are improved, and the environmental applicability is improved, the problem that the laser reflector and the ball bar need to be installed separately and the light path is blocked by the ball bar is reduced.

[0029] Embodiment 2

[0030] The laser interferometer and ball bar composite motion precision calibration device provided in the embodiment is shown in Figures 2-4 As shown in the figure, the calibration assembly 3 comprises a connecting plate 301 fixedly installed on one side of the machine tool shell 1, a rotating shaft 305 rotatably installed on the upper surface of the connecting plate 301, a swing rod 304 rotatably connected to the upper surface of the rotating shaft 305, a No. 1 motor 302 arranged on the lower surface of the connecting plate 301, and the output shaft of the No. 1 motor 302 connected to one end of the lower surface of the rotating shaft 305. One end of the swing rod 304 is slidably connected with a circular ring rod 303, the other end of the circular ring rod 303 is fixedly installed on one end of the machine tool shell 1, a rotating shaft 307 is rotatably installed on one end of the upper surface of the swing rod 304, and the laser interferometer shell 204 is rotatably connected to one end of the upper surface of the rotating shaft 307. The swing rod 304 can be swung along the circular ring rod 303 by rotating the rotating shaft 305. A bearing plate 306 is fixedly installed on one end of the lower surface of the swing rod 304, a No. 2 motor 308 is arranged on the lower surface of the bearing plate 306, and a first gear 309 is connected to the surface of the bearing plate 306 and penetrates through the No. 2 motor 308. One end of the first gear 309 is meshingly connected with a second gear 310, the upper surface of the second gear 310 is fixedly installed with a transmission rod 311, and the transmission rod 311 penetrates one end of the swing rod 304 and is connected to one end of the lower surface of the rotating shaft 307.

[0031] By the design of the rotating shaft 305, the circular ring rod 303, the rotating shaft 307 and the first gear 309, the first motor 302 drives the rotating shaft 305, and then drives the swing rod 304 to swing left and right, adjusts the horizontal position of the laser interferometer shell 204, and makes the swing rod 304 only swing around the fixed points of the rotating shaft 305 and the circular ring rod 303 when the swing rod 304 rotates, which can play a positioning and guiding role, and ensure the stability and accuracy of the movement of the swing rod 304. Then the second motor 308 drives the first gear 309, the first gear 309 meshes with the second gear 310, thereby driving the second gear 310 to rotate, the transmission rod 311 on the second gear 310 penetrates the swing rod 304 and is connected to the rotating shaft 307, so that the rotating shaft 307 rotates, and then drives the laser interferometer shell 204 connected with the rotating shaft 307 to rotate, realizes the angle adjustment of the laser interferometer, reduces the interference of external factors on the measurement result, and thereby improves the measurement precision and reliability.

[0032] In summary, the motion precision calibration device combined with the laser interferometer and the ball bar provided by the embodiment has the following advantages: when the laser interferometer and the ball bar are installed, the installation space can be reduced, the laser is reflected back to the laser interferometer by coating a reflective film on the surface of the center ball 201, and the motion information of the machine tool motion part can be measured by analyzing the laser interference, so that the compatibility can be effectively improved.

[0033] When in use, the first motor 302 drives the rotating shaft 305, and then drives the swing rod 304 to swing left and right, adjusts the horizontal position of the laser interferometer shell 204, and makes the swing rod 304 only swing around the fixed points of the rotating shaft 305 and the circular ring rod 303 when the swing rod 304 rotates, which can play a positioning and guiding role, and ensure the stability and accuracy of the movement of the swing rod 304. Then the second motor 308 drives the first gear 309, the first gear 309 meshes with the second gear 310, thereby driving the second gear 310 to rotate, the transmission rod 311 on the second gear 310 penetrates the swing rod 304 and is connected to the rotating shaft 307, so that the rotating shaft 307 rotates, and then drives the laser interferometer shell 204 connected with the rotating shaft 307 to rotate, ensures that the laser beam can be incident on the reflective film of the center ball 201, and avoids the spatial interference between the laser interferometer and the ball bar by integrating the reflective film in the center ball 201, so that they can be better used together. The light is reflected back to the laser interferometer, the displacement, straightness, perpendicularity and other precision parameters of the machine tool motion part in different directions can be measured by analyzing the laser interference, the composite measurement precision is improved, and the comprehensiveness and accuracy of the measurement are improved.

[0034] The above merely describes preferred embodiments of the present application, and is not intended to limit the implementation and protection scope of the present application. For those skilled in the art, it should be understood that any equivalent substitutions and obvious changes made according to the content of the present application and drawings should be included in the protection scope of the present application.

Claims

1. A motion accuracy calibration device combining a laser interferometer and a ballbar, characterized in that, The machine tool housing (1) and worktable (101) are included for mounting the ballbar base (2) and the laser interferometer housing (204). A calibration component (3) is provided on one side surface of the machine tool housing (1). One end of the calibration component (3) is connected to the laser interferometer housing (204). The worktable (101) is provided inside the machine tool housing (1). The ballbar base (2) is mounted on the upper surface of the worktable (101). A center ball (201) is provided at the upper end of the ballbar base (2). The surface of the center ball (201) is coated with a reflective film. The laser interferometer housing (204) is set in a corresponding position to the center of the center ball (201).

2. The motion accuracy calibration device combining a laser interferometer and a ballbar as described in claim 1, characterized in that, One end of the central ball (201) is connected to a ball bar sensor (202), and one end of the ball bar sensor (202) is provided with a sensor ball (203). The sensor ball (203) is connected to the machine tool spindle for motion accuracy calibration.

3. The motion accuracy calibration device combining a laser interferometer and a ballbar as described in claim 1, characterized in that, The calibration component (3) includes a connecting plate (301), which is fixedly installed on one side of the machine tool housing (1). A rotating shaft (305) is rotatably installed on the upper surface of the connecting plate (301), and a swing rod (304) is rotatably connected to the upper surface of the rotating shaft (305). A motor (302) is provided on the lower surface of the connecting plate (301), and the output shaft of the motor (302) is connected to one end of the lower surface of the rotating shaft (305).

4. The motion accuracy calibration device combining a laser interferometer and a ballbar as described in claim 3, characterized in that, One end of the swing rod (304) is slidably connected to a ring rod (303), and the other end of the ring rod (303) is fixedly installed on one end of the machine tool housing (1). A rotating shaft (307) is rotatably installed on one end of the upper surface of the swing rod (304), and the laser interferometer housing (204) is rotatably connected to one end of the upper surface of the rotating shaft (307). The swing rod (304) can be rotated by the rotating shaft (305) to swing along the ring rod (303).

5. The motion accuracy calibration device combining a laser interferometer and a ballbar as described in claim 4, characterized in that, A bearing plate (306) is fixedly installed on one end of the lower surface of the swing rod (304). A second motor (308) is provided on the lower surface of the bearing plate (306). The second motor (308) passes through the surface of the bearing plate (306) and is connected to a first gear (309).

6. The motion accuracy calibration device combining a laser interferometer and a ballbar as described in claim 5, characterized in that, The first gear (309) is meshed with a second gear (310) at one end. A transmission rod (311) is fixedly installed on the upper surface of the second gear (310). The transmission rod (311) passes through the swing rod (304) and is connected to one end of the lower surface of the rotating shaft (307).

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