Tool setting method for multi-station machine tool

Abstract

The application discloses a kind of multi-station machine tool's tool setting method, including the following steps: line laser sensor tool setting;Grinding wheel tool setting;Special-shaped antenna cover tool setting.The multi-station machine tool includes Z direction movement module, line laser sensor, X direction movement module, side milling head, grinding wheel, center support rod, acoustic emission sensor, tool setting block and C shaft rotation module;The upper structure of the bed includes inclined plane and horizontal plane.The application can carry out measurement processing integration, avoids the processing error caused by multiple clamping, and only needs to be carried out once alignment and tool setting, improves processing efficiency.The tool setting mode of the application can realize automation, greatly reduces the artificial error caused by manual alignment and tool setting.The application can accurately find the accurate coordinates of the tool setting points of line laser sensor, grinding wheel and special-shaped antenna cover in machine tool coordinate system, establishes contact with machine tool coordinate system to realize later high-precision processing.

Description

Technical Field

[0001] This invention relates to a multi-station machine tool, and more particularly to a tool setting method for a multi-station machine tool. Background Technology

[0002] A radome is a protective shell or cover used to protect and isolate an antenna. Its primary function is to protect the antenna within an antenna system from harsh external environments and reduce electromagnetic interference with the surrounding environment. It is widely used in various guidance and radar systems. Beyond protecting the antenna, the radome itself must possess good wave transmission performance, and the thickness of the radome wall is a crucial factor affecting its electrical performance parameters. Furthermore, the radome's external profile significantly impacts the stability and aiming accuracy of some guidance systems. Therefore, to ensure that the radome wall thickness and external shape meet the required specifications, high-precision machining of the radome's outer surface is essential.

[0003] Currently, the machining and measurement of radomes in factories are usually performed separately. The radome surface is ground on a machine tool, and after machining, the radome is disassembled and placed on a specialized large measuring instrument, such as a coordinate measuring machine, for measurement to check if its dimensions meet the requirements. If it does not meet the requirements, the radome needs to be clamped back onto the machine tool for machining, and this process is repeated until the radome's dimensions, electrical performance, and other parameters meet the requirements. However, this machining method is time-consuming and labor-intensive, and it can introduce significant machining and measurement errors due to repeated clamping. As the machining accuracy requirements for radomes continue to increase, it is necessary to adopt equipment that integrates measurement and machining, enabling the radome to be measured and ground on-machine without repeated clamping. To achieve high-precision integrated measurement and machining, high-precision tool setting is particularly important.

[0004] Due to factors such as the shape and size of the irregularly shaped radome, the X-axis travel range of the machine tool is limited to a minimum of 500mm. Using a common flat bed structure would result in a larger overall machine tool size and increased production costs. Therefore, to reduce costs and meet the X-axis travel requirements, a slant bed structure is adopted. However, due to the slant, compared to traditional horizontal bed machine tools, operators need to pay closer attention to the relative position of the tool and workpiece during tool positioning to ensure machining accuracy. Furthermore, research on tool setting methods for slant bed machine tools with measurement modules is limited, necessitating the exploration of tool setting methods for multi-station slant bed machine tools.

[0005] Existing methods require determining the accurate coordinates of the tool setting points of the measurement and machining modules within the machine tool during tool setting to achieve high-precision matching between the measurement and machining points. Currently, this integrated measurement and machining tool setting method is typically performed manually. For the measurement module, the accuracy of tool setting largely depends on the sensor's precision; however, for the machining module, the operator's skill level becomes the primary factor influencing accuracy. Therefore, the operator's experience and skill level significantly impact the entire machining process and are prone to substantial human error, ultimately compromising the final machining accuracy. Summary of the Invention

[0006] To address the aforementioned problems in existing technologies, this invention aims to design a tool setting method for slant bed multi-station machine tools that can achieve automation and high precision.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a tool setting method for a multi-station machine tool, wherein the multi-station machine tool includes a bed, a tailstock mechanism, a Z-axis moving module, a sensor fixing plate, a line laser sensor, an X-axis moving module, a side milling head, a grinding wheel, a central support rod, an acoustic emission sensor, a tool setting block, and a C-axis rotating module; the upper structure of the bed includes an inclined surface and a horizontal surface, wherein the angle between the inclined surface and the horizontal surface is α;

[0008] The Z-axis moving module is mounted on the inclined surface of the bed, and the X-axis moving module is mounted on the Z-axis moving module; the tail top mechanism is mounted on the left side of the horizontal surface of the bed, and the C-axis rotating module is mounted on the right side of the horizontal surface of the bed; an irregularly shaped antenna cover is installed between the tail top mechanism and the C-axis rotating module; the rotation axis of the central support rod coincides with the rotation axis of the C-axis rotating module.

[0009] The line laser sensor is mounted on the X-axis moving module via a sensor mounting plate. The laser line emitted by the line laser sensor is parallel to the inclined surface of the machine tool, and the extension line of the emitted laser line intersects the rotation axis of the C-axis rotating module. The range of the line laser sensor is 60±8mm. When the reference distance between the measured object and the line laser sensor is 60mm, the length of the laser line of the line laser sensor is 15mm.

[0010] The grinding wheel is mounted on the X-axis module via a side milling head. The rotation axis of the grinding wheel is parallel to the rotation axis of the C-axis rotation module, and the plane formed by the two rotation axes is parallel to the inclined plane of the machine tool. The standard radius of the grinding wheel is r0 = 120 mm, and the thickness is h0 = 40 mm.

[0011] The tool setting block is an annular block composed of two semi-circular ring blocks joined together, and is nested on the cylindrical surface of the central support rod by bolts; the acoustic emission sensor is fixed to the left end face of the tool setting block and is used to detect whether the grinding wheel is in contact with the tool setting block during tool setting; the inner radius of the tool setting block is r1 = 50mm, the outer radius is r2 = 90mm, and the thickness is h1 = 50mm.

[0012] The tool setting method includes the following steps:

[0013] A. Line laser sensor tool setting

[0014] A1. Set the machine tool coordinate system O M -X M Y M Z M The origin is the center of the circle on the right side of the central support rod; the Z-axis of the coordinate system... M The axis is parallel to the Z-axis moving module's direction of motion, with the horizontal leftward direction being Z. M The positive direction of the axis; the X-axis of the coordinate system. M The axis is parallel to the X-axis, which is the direction of motion of the moving module; the Y-axis of the coordinate system is parallel to the X-axis. M The axis is perpendicular to Z. M Axis and X M The axes follow the right-hand rule; the Z-axis moving module drives the X-axis moving module to move left and right; the X-axis moving module drives the line laser sensor and grinding wheel to move up and down along the X-axis guide rail; let the coordinate system of the line laser sensor be o. p -x p y p z p The origin is the midpoint of the laser line at a reference distance of 60mm between it and the object being measured, where x p axis and z p The x-axis is the coordinate axis of the measurement data itself from the line laser sensor. p The axis is the horizontal direction of the laser line, z p The axis represents the emission direction of the laser from the linear laser sensor.

[0015] A2. Perform X-axis tool setting operation on the line laser sensor. Move the Z-axis and X-axis moving modules by executing the program, ensuring the entire laser line from the line laser sensor hits the tool setting block. p The measurement readings of all axes are 0. Record the coordinate values ​​X1 and Z1 of the machine tool's linear encoder at this time. Then, when the zero point of the line laser sensor's coordinate system coincides with the X-axis of the tool setting reference point, the reading of the machine tool's linear encoder is:

[0016] X 线 =X1-r2

[0017] A3. Perform Z-axis tool setting operation on the line laser sensor. Move the X-axis moving module to coordinate X1 using the program. At this point, the laser line length of the line laser sensor is 15mm. Move the Z-axis moving module so that 11-12mm of the laser line hits the tool setting block, while the remaining 3-4mm of the laser line extends beyond the right end face of the tool setting block. This 3-4mm extension is outside the measurement range, and the measurement result will show no reading. Record the first point to the right of the laser coordinate zero point in the line laser sensor coordinate system. p -x p y p z p The coordinates x below p1 and z p1 Record the coordinates X1 and Z2 of the machine tool grating ruler at this time. Then, when the coordinate zero point of the line laser sensor coincides with the Z-axis of the tool setting reference point, the reading of the machine tool grating ruler is:

[0018] Z 线 =Z2+x p1

[0019] B. Grinding wheel tool setting

[0020] B1. Set the grinding wheel coordinate system O. G -X G Y G Z G The origin is the center of the circle on the right side surface of the grinding wheel; the directions of each axis of the grinding wheel coordinate system are the same as the directions of each axis of the machine tool coordinate system.

[0021] B2. Perform the X-axis tool setting operation on the grinding wheel. Move the Z-axis and X-axis movement modules by executing the program until the grinding wheel is near the outer surface of the tool setting block. Then, rotate the grinding wheel at 2000 r / min. Move the X-axis movement module along the positive X-axis. During this movement, use an acoustic emission sensor to detect the vibration of the tool setting block. When the grinding wheel contacts the tool setting block, if the signal detected by the acoustic emission sensor exceeds a specified threshold, a return command will stop the grinding wheel. Record the coordinate values ​​X3 and Z3 of the machine tool's linear scale at this time. The reading of the machine tool's linear scale when the zero point of the grinding wheel coordinate system coincides with the X-axis of the tool setting reference point is:

[0022] X 砂 =X3-r2-r0

[0023] B3. Perform the Z-axis tool setting operation on the grinding wheel. Move the Z-axis and X-axis movement modules via the program to bring the grinding wheel to the vicinity of the right side surface of the tool setting block. Then, rotate the grinding wheel at 2000 r / min. Move the Z-axis movement module along the positive Z-axis. During this movement, use an acoustic emission sensor to detect the vibration of the tool setting block. When the grinding wheel contacts the tool setting block, if the signal detected by the acoustic emission sensor exceeds a specified threshold, a return command will stop the grinding wheel. Record the coordinate values ​​X4 and Z4 of the machine tool's linear scale at this time. The reading of the machine tool's linear scale when the zero point of the grinding wheel coordinate system coincides with the Z-axis of the tool setting reference point is:

[0024] Z 砂 =Z4-h0

[0025] C. Adjusting the knife for the irregularly shaped radome.

[0026] C1. The irregularly shaped radome is the workpiece to be machined on this machine tool. Its small end is constrained by the tailstock mechanism, and its large end is clamped and positioned by a flexible fixture on the fixture support plate. Let the workpiece coordinate system be O. W -X W Y W Z W The origin is the intersection of the central axis of the sphere at the small end of the irregularly shaped radome and the large end face; the workpiece coordinate system O W -X W Y W Z W The directions of each axis of the coordinate system are the same as the directions of each axis of the machine tool coordinate system;

[0027] C2. Perform Z-axis tool setting on the irregularly shaped radome. Move the X-axis moving module by executing the program until the distance between the line laser sensor and the outer surface of the irregularly shaped radome is within the measurement range. At this point, the laser line length of the line laser sensor is 15mm. Move the Z-axis moving module so that 11-12mm of the laser line hits the irregularly shaped radome, while the remaining 3-4mm of the laser line extends beyond the right end face of the radome. This 3-4mm extension is outside the measurement range, and the measurement result shows no reading. Record the first point to the right of the laser coordinate zero point in the line laser sensor coordinate system. p -x p y p z p The coordinates x below p2 and z p2 Record the coordinates of the machine tool's linear scale at this moment as X5 and Z5. Then, the Z-axis coordinate of the workpiece coordinate system zero point in the machine tool coordinate system at this moment is:

[0028] Z 罩 =Z5+x p2

[0029] C3. Perform C-axis tool setting on the irregularly shaped radome. The radome has an axisymmetric structure similar to a triangular pyramid, with its C-axis zero point based on its horizontally positioned base. During tool setting, the program first rotates the radome to a position that appears horizontal to the naked eye. Then, it rotates 25° clockwise, moves the Z-axis moving module to move the line laser sensor to the Z5+x2 position, and moves the X-axis moving module to adjust the Z-axis of the line laser sensor. p All axis measurements are 0. Keeping the line laser sensor position unchanged, rotate the irregularly shaped radome 10° clockwise and record the line laser sensor readings and their corresponding C-coordinates during the rotation. After rotation, find the minimum z-value corresponding to the x-axis in the line laser sensor measurement data, and then find the coordinates X6, Z6, and C6 of the machine tool grating ruler at this point. The C-axis coordinates of the workpiece's C-axis zero point in the machine tool coordinate system at this point are:

[0030] C 罩 =C6-30.

[0031] Furthermore, the included angle α ranges from 45° to 75°.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. This invention includes a measurement module and a processing module, which can integrate measurement and processing, avoid processing errors caused by multiple clamping, and only requires one alignment and tool setting, thus improving processing efficiency.

[0034] 2. The tool setting method of this invention can achieve automation, greatly reducing human error caused by manual alignment and tool setting. Through the entire tool setting process, the precise coordinates of the tool setting points of the line laser sensor, grinding wheel, and irregular radome can be accurately found in the machine tool coordinate system, and the connection between these three and the machine tool coordinate system can be established to achieve high-precision machining in the later stage. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention.

[0036] Figure 2 This is a schematic diagram of the sensor X-axis tool setting in step A2 of the present invention.

[0037] Figure 3 This is a schematic diagram of the sensor Z-axis tool setting in step A3 of the present invention.

[0038] Figure 4 This is a schematic diagram of step B2 of the present invention, which shows the grinding wheel X-axis tool setting.

[0039] Figure 5 This is a schematic diagram of step B3 of the present invention, which shows the Z-axis tool setting of the grinding wheel.

[0040] Figure 6 This is a schematic diagram of step C2, Z-axis knife setting of the irregular antenna radome, of the present invention.

[0041] Figure 7 This is a schematic diagram of step C3 of the present invention, which involves setting the irregular antenna radome in the C direction.

[0042] In the diagram: 1. Bed; 2. Tail-end mechanism; 3. Z-axis moving module; 4. Sensor mounting plate; 5. Line laser sensor; 6. X-axis moving module; 7. Side milling head; 8. Grinding wheel; 9. Irregular radome; 10. Central support rod; 11. Acoustic emission sensor; 12. Tool setting block; 13. C-axis rotating module; 14. Connecting bolt; 15. Fixture support plate; 16. Flexible fixture. Detailed Implementation

[0043] The invention will now be further described with reference to the accompanying drawings. Figure 1-7 As shown, a tool setting method for a multi-station machine tool is disclosed. The multi-station machine tool includes a bed 1, a tailstock mechanism 2, a Z-axis moving module 3, a sensor fixing plate 4, a line laser sensor 5, an X-axis moving module 6, a side milling head 7, a grinding wheel 8, a central support rod 10, an acoustic emission sensor 11, a tool setting block 12, and a C-axis rotating module 13. The upper structure of the bed 1 includes an inclined surface and a horizontal surface, and the angle between the inclined surface and the horizontal surface is α.

[0044] The Z-axis moving module 3 is mounted on the inclined surface of the bed 1, and the X-axis moving module 6 is mounted on the Z-axis moving module 3; the tail top mechanism 2 is mounted on the left side of the horizontal surface of the bed 1, and the C-axis rotating module 13 is mounted on the right side of the horizontal surface of the bed 1; an irregularly shaped antenna cover 9 is installed between the tail top mechanism 2 and the C-axis rotating module 13; the rotation axis of the central support rod 10 coincides with the rotation axis of the C-axis rotating module 13;

[0045] The line laser sensor 5 is mounted on the X-axis moving module 6 via the sensor fixing plate 4. The laser line emitted by the line laser sensor 5 is parallel to the inclined surface of the machine tool, and the extension line of the emitted laser line intersects the rotation axis of the C-axis rotating module 13. The range of the line laser sensor 5 is 60±8mm. When the reference distance between the measured object and the line laser sensor 5 is 60mm, the length of the laser line of the line laser sensor 5 is 15mm.

[0046] The grinding wheel 8 is mounted on the X-axis moving module 6 via the side milling head 7. The rotation axis of the grinding wheel 8 is parallel to the rotation axis of the C-axis rotating module 13, and the plane formed by the two rotation axes is parallel to the inclined plane of the machine tool. The standard radius of the grinding wheel 8 is r0 = 120 mm, and the thickness is h0 = 40 mm.

[0047] The tool setting block 12 is an annular block composed of two semi-circular annular blocks joined together, and is nested on the cylindrical surface of the central support rod 10 by bolts; the acoustic emission sensor 11 is fixed to the left end face of the tool setting block 12 and is used to detect whether the grinding wheel 8 is in contact with the tool setting block 12 during tool setting; the inner radius of the tool setting block 12 is r1 = 50 mm, the outer radius is r2 = 90 mm, and the thickness is h1 = 50 mm;

[0048] The tool setting method includes the following steps:

[0049] A. Line laser sensor, 5 pairs of blades

[0050] A1. Set the machine tool coordinate system O M -X M Y M Z M The origin is the center of the right side of the central support rod 10; the Z-axis of the coordinate system... M The axis is parallel to the Z-axis moving module 3, with the horizontal leftward direction being Z. M The positive direction of the axis; the X-axis of the coordinate system. M The axis is parallel to the X-axis, moving in the direction of module 6; the Y-axis of the coordinate system... M The axis is perpendicular to Z. M Axis and X M The axis follows the right-hand rule; the Z-axis moving module 3 drives the X-axis moving module 6 to move left and right; the X-axis moving module 6 drives the line laser sensor 5 and the grinding wheel 8 to move up and down along the X-axis guide rail; let the coordinate system of the line laser sensor 5 be o. p -x p y p z p The origin is the midpoint of the laser line at a reference distance of 60mm between it and the object being measured, where x p axis and z p The x-axis is the coordinate axis of the measurement data itself from the line laser sensor 5. p The axis is the horizontal direction of the laser line, z p The axis represents the emission direction of the laser from the linear laser sensor 5;

[0051] A2. Perform the X-axis tool setting operation on the line laser sensor 5. By executing the program, move the Z-axis moving module 3 and the X-axis moving module 6 so that the entire laser line of the line laser sensor 5 hits the tool setting block 12. p The measurement readings of all axes are 0. Record the coordinate values ​​X1 and Z1 of the machine tool grating ruler at this time. Then, when the coordinate zero point of the line laser sensor 5 coincides with the X-axis of the tool setting reference point, the reading of the machine tool grating ruler is:

[0052] X 线 =X1-r2

[0053] A3. Perform tool setting operation on the Z-axis of the line laser sensor 5. Move the X-axis moving module 6 to coordinate X1 by executing the program. At this time, the laser line length of the line laser sensor 5 is 15mm. Move the Z-axis moving module 3 so that 11-12mm of the laser line hits the tool setting block 12, and the remaining 3-4mm of the laser line extends beyond the right end face of the tool setting block 12. At this time, the 3-4mm of the laser line extending beyond the range is in the over-range range, and the measurement result shows no reading. Record the first point with a reading to the right of the laser coordinate zero point in the coordinate system of the line laser sensor 5. p -x p y p z p The coordinates x below p1 and z p1 Record the coordinates X1 and Z2 of the machine tool grating ruler at this time. Then, when the coordinate zero point of the line laser sensor 5 coincides with the Z-axis of the tool setting reference point, the reading of the machine tool grating ruler is:

[0054] Z 线 =Z2+x p1

[0055] B. Grinding wheel with 8 pairs of tools

[0056] B1. Set the coordinate system O of the grinding wheel 8. G -X G Y G Z G The origin is the center of the circle on the right side surface of the grinding wheel 8; the directions of each axis of the coordinate system of the grinding wheel 8 are the same as the directions of each axis of the machine tool coordinate system.

[0057] B2. Perform X-axis tool setting operation on grinding wheel 8. Move the Z-axis moving module 3 and X-axis moving module 6 by executing the program, moving the grinding wheel 8 to near the outer surface of the tool setting block 12. Then, rotate the grinding wheel 8 at 2000 r / min. Move the X-axis moving module 6 along the positive X-axis. During this movement, use the acoustic emission sensor 11 to detect the vibration of the tool setting block 12. When the grinding wheel 8 contacts the tool setting block 12, if the signal detected by the acoustic emission sensor 11 exceeds a specified threshold, a return command will stop the grinding wheel 8. Record the coordinate values ​​X3 and Z3 of the machine tool grating ruler at this time. The reading of the machine tool grating ruler when the zero point of the grinding wheel 8 coordinate system coincides with the X-axis of the tool setting reference point is:

[0058] X 砂 =X3-r2-r0

[0059] B3. Perform the Z-axis tool setting operation on the grinding wheel 8. Move the Z-axis moving module 3 and the X-axis moving module 6 by executing the program, moving the grinding wheel 8 to the vicinity of the right side surface of the tool setting block 12. Then, rotate the grinding wheel 8 at 2000 r / min. Move the Z-axis moving module 3 along the positive Z-axis. During the movement, use the acoustic emission sensor 11 to detect the vibration of the tool setting block 12. When the grinding wheel 8 contacts the tool setting block 12, the signal detected by the acoustic emission sensor 11 exceeds the specified threshold, and a return command is given to stop the grinding wheel 8. Record the coordinate values ​​X4 and Z4 of the machine tool grating ruler at this time. The reading of the machine tool grating ruler when the zero point of the grinding wheel 8 coordinate system coincides with the Z-axis of the tool setting reference point is:

[0060] Z 砂 =Z4-h0

[0061] C. Irregularly shaped radome with 9 pairs of blades

[0062] C1, the irregularly shaped radome 9 is the workpiece to be machined on this machine tool. Its small end is constrained by the tailstock mechanism 2, and its large end is clamped and positioned by a flexible fixture on the fixture support plate. Let the workpiece coordinate system O be... W -X W Y W Z W The origin is the intersection of the central axis of the sphere at the small end of the irregularly shaped radome 9 and the large end face; the workpiece coordinate system O W -X W Y W Z W The directions of each axis of the coordinate system are the same as the directions of each axis of the machine tool coordinate system;

[0063] C2. Perform Z-axis tool setting on the irregular radome 9. Move the X-axis moving module 6 by executing the program until the distance between the line laser sensor 5 and the outer surface of the irregular radome 9 is within the measurement range. At this point, the laser line length of the line laser sensor 5 is 15mm. Move the Z-axis moving module 3 so that 11-12mm of the laser line hits the irregular radome 9, while the remaining 3-4mm of the laser line extends beyond the right end face of the irregular radome 9. This 3-4mm extension is outside the measurement range, and the measurement result shows no reading. Record the first point with a reading to the right of the laser coordinate zero point in the coordinate system of the line laser sensor 5. p -x p y p z p The coordinates x below p2 2 and z p2 Record the coordinates of the machine tool's linear scale at this moment as X5 and Z5. Then, the Z-axis coordinate of the workpiece coordinate system zero point in the machine tool coordinate system at this moment is:

[0064] Z 罩 =Z5+x p2

[0065] C3. Perform C-axis tool setting on the irregular radome 9. The irregular radome 9 has an axisymmetric structure similar to a triangular pyramid, with its C-axis zero point based on its horizontally positioned base. During tool setting, the program first rotates the irregular radome 9 to a position that appears horizontal to the naked eye, then rotates it 25° clockwise, moves the Z-axis moving module 3 to move the line laser sensor 5 to the Z5+x2 position, and moves the X-axis moving module 6 to adjust the Z-axis of the line laser sensor 5. p All axis measurements are 0. Keeping the position of the line laser sensor 5 unchanged, rotate the irregularly shaped radome 9 clockwise by 10°, recording the line laser sensor 5 readings and their corresponding C-coordinates during the rotation. After rotation, find the minimum z-value corresponding to the x-axis in the line laser sensor 5 measurement data, and find the coordinates X6, Z6, and C6 of the machine tool grating ruler at this time. Then, the C-axis coordinates of the workpiece's C-axis zero point in the machine tool coordinate system are obtained as follows:

[0066] C 罩 =C6-30.

[0067] Furthermore, the included angle α ranges from 45° to 75°.

[0068] This invention is not limited to this embodiment. Any equivalent concept or modification within the technical scope disclosed in this invention shall be included within the protection scope of this invention.

Claims

1. A tool setting method for a multi-station machine tool, characterized in that: The multi-station machine tool includes a bed (1), a tailstock mechanism (2), a Z-axis moving module (3), a sensor mounting plate (4), a line laser sensor (5), an X-axis moving module (6), a side milling head (7), a grinding wheel (8), a central support rod (10), an acoustic emission sensor (11), a tool setting block (12), and a C-axis rotating module (13); the upper structure of the bed (1) includes an inclined surface and a horizontal surface, and the angle between the inclined surface and the horizontal surface is α; The Z-axis moving module (3) is installed on the inclined surface of the bed (1), and the X-axis moving module (6) is installed on the Z-axis moving module (3); the tail top mechanism (2) is installed on the left side of the horizontal plane of the bed (1), and the C-axis rotating module (13) is installed on the right side of the horizontal plane of the bed (1); an irregularly shaped radome (9) is installed between the tail top mechanism (2) and the C-axis rotating module (13); the rotation axis of the central support rod (10) coincides with the rotation axis of the C-axis rotating module (13); The line laser sensor (5) is mounted on the X-axis moving module (6) via a sensor mounting plate (4). The laser line emitted by the line laser sensor (5) is parallel to the inclined surface of the machine tool, and the extension line of the emitted laser line intersects the rotation axis of the C-axis rotating module (13). The range of the line laser sensor (5) is 60±8mm. When the reference distance between the measured object and the line laser sensor (5) is 60mm, the length of the laser line of the line laser sensor (5) is 15mm. The grinding wheel (8) is mounted on the X-axis moving module (6) via the side milling head (7). The rotation axis of the grinding wheel (8) is parallel to the rotation axis of the C-axis rotating module (13), and the plane formed by the two rotation axes is parallel to the inclined plane of the machine tool. The standard radius of the grinding wheel (8) is r0 = 120 mm, and the thickness is h0 = 40 mm. The tool setting block (12) is an annular block composed of two semi-circular annular blocks joined together, and is nested on the cylindrical surface of the central support rod (10) by bolts; the acoustic emission sensor (11) is fixed to the left end face of the tool setting block (12) and is used to detect whether the grinding wheel (8) is in contact with the tool setting block (12) during tool setting; the inner radius of the tool setting block (12) is r1 = 50 mm, the outer radius is r2 = 90 mm, and the thickness is h1 = 50 mm; The tool setting method includes the following steps: A. Line laser sensor (5) tool setting A1. Set the machine tool coordinate system O M -X M Y M Z M The origin is the center of the right side of the central support rod (10); the Z coordinate system is... M The axis is parallel to the Z-axis moving module (3) and moves horizontally to the left. M The positive direction of the axis; the X-axis of the coordinate system. M The axis is parallel to the X-axis of the moving module (6); the Y-axis of the coordinate system is parallel to the X-axis of the moving module (6). M The axis is perpendicular to Z. M Axis and X M The axis and direction follow the right-hand rule; the Z-axis moving module (3) drives the X-axis moving module (6) to move left and right; the X-axis moving module (6) drives the line laser sensor (5) and the grinding wheel (8) to move up and down along the X-axis guide rail; let the coordinate system of the line laser sensor (5) be o. p -x p y p z p The origin is the midpoint of the laser line at a reference distance of 60mm between it and the object being measured, where x p axis and z p The axis is the coordinate axis of the measurement data itself of the line laser sensor (5), x p The axis is the horizontal direction of the laser line, z p The laser emission direction of the linear laser sensor (5) is as follows: A2. Perform X-axis tool setting operation on the line laser sensor (5). By executing the program, move the Z-axis moving module (3) and the X-axis moving module (6) so that the entire laser line of the line laser sensor (5) hits the tool setting block (12). p The measurement readings of the axes are all 0. Record the coordinate values ​​of the machine tool grating ruler as X1 and Z1 at this time. Then, when the coordinate zero point of the line laser sensor (5) coincides with the X-axis of the tool setting reference point, the reading of the machine tool grating ruler is: X 线 =X1-r2 A3. Perform Z-axis tool setting operation on the line laser sensor (5). Move the X-axis moving module (6) to coordinate X1 by executing the program. At this time, the laser line length of the line laser sensor (5) is 15mm. Move the Z-axis moving module (3) so that 11-12mm of the laser line hits the tool setting block (12). The other 3-4mm of the laser line extends beyond the right end face of the tool setting block (12). At this time, the 3-4mm of the laser line extending beyond the end face is in the over-range range, and the measurement result shows no reading. Record the first point with a reading to the right of the laser coordinate zero point in the coordinate system of the line laser sensor (5). p -x p y p z p The coordinates x below p1 and z p1 Record the coordinates X1 and Z2 of the machine tool grating ruler at this time. Then, when the coordinate zero point of the line laser sensor (5) coincides with the Z-axis of the tool setting reference point, the reading of the machine tool grating ruler is: Z 线 = Z2+x p1 B. Grinding wheel (8) tool setting B1. Set the coordinate system O of the grinding wheel (8). G -X G Y G Z G The origin is the center of the right side surface of the grinding wheel (8); the directions of each axis of the grinding wheel (8) coordinate system are the same as the directions of each axis of the machine tool coordinate system; B2. Perform X-axis tool setting operation on the grinding wheel (8). By executing the program, move the Z-axis moving module (3) and the X-axis moving module (6) to move the grinding wheel (8) to the vicinity of the outer surface of the tool setting block (12). Then, rotate the grinding wheel (8) at a speed of 2000 r / min. Move the X-axis moving module (6) along the positive X-axis. During the movement, use the acoustic emission sensor (11) to detect the vibration of the tool setting block (12). When the grinding wheel (8) contacts the tool setting block (12), the signal detected by the acoustic emission sensor (11) exceeds the specified threshold. Return the command to stop the grinding wheel (8). Record the coordinate values ​​of the machine tool grating ruler at this time as X3 and Z3. Then, when the zero point of the coordinate system of the grinding wheel (8) coincides with the X-axis of the tool setting reference point, the reading of the machine tool grating ruler is: X 砂 =X3-r2-r0 B3. Perform Z-axis tool setting operation on the grinding wheel (8). Move the Z-axis moving module (3) and X-axis moving module (6) by executing the program to move the grinding wheel (8) to the vicinity of the right side surface of the tool setting block (12). Then, rotate the grinding wheel (8) at 2000 r / min. Move the Z-axis moving module (3) along the positive Z-axis. During the movement, use the acoustic emission sensor (11) to detect the vibration of the tool setting block (12). When the grinding wheel (8) contacts the tool setting block (12), the signal detected by the acoustic emission sensor (11) exceeds the specified threshold. Return the command to stop the grinding wheel (8). Record the coordinate values ​​of the machine tool grating ruler at this time as X4 and Z4. Then, when the zero point of the coordinate system of the grinding wheel (8) coincides with the Z-axis of the tool setting reference point, the reading of the machine tool grating ruler is: WITH 砂 =Z4-h0 C. Irregular radome (9) knife setting C1. The irregularly shaped radome (9) is the workpiece to be processed by this machine tool. Its small end is constrained by the tailstock mechanism (2), and its large end is clamped and positioned by the flexible fixture on the fixture support plate. Let the workpiece coordinate system O W -X W Y W Z W The origin is the intersection of the central axis of the sphere at the small end of the irregular radome (9) and the large end face; the workpiece coordinate system O W -X W Y W Z W The directions of each axis of the coordinate system are the same as the directions of each axis of the machine tool coordinate system; C2. Perform Z-axis tool setting on the irregular radome (9). Move the X-axis moving module (6) by executing the program to make the distance between the line laser sensor (5) and the outer surface of the irregular radome (9) within the range. At this time, the laser line length of the line laser sensor (5) is 15mm. Move the Z-axis moving module (3) so that 11-12mm of the laser line hits the irregular radome (9), and the other 3-4mm of the laser line extends beyond the right end face of the irregular radome (9). At this time, the 3-4mm of the laser line extending beyond the range is in the over-range range, and the measurement result shows no reading. Record the first point with a reading to the right of the laser coordinate zero point in the coordinate system of the line laser sensor (5). p -x p y p z p The coordinates x below p2 2 and z p2 Record the coordinates of the machine tool's linear scale at this moment as X5 and Z5. Then, the Z-axis coordinate of the workpiece coordinate system zero point in the machine tool coordinate system at this moment is: Z 罩 =Z5+x p2 C3. Perform C-axis tool setting on the irregular radome (9). The irregular radome (9) has an axially symmetrical structure similar to a triangular pyramid, and its C-axis zero point is based on its base when it is placed horizontally. During tool setting, the irregular radome (9) is first rotated to a position that appears horizontal to the naked eye by executing the program, then rotated 25° clockwise, and the Z-axis moving module (3) is moved to move the line laser sensor (5) to the Z5+x2 position. The X-axis moving module (6) is then moved to move the z-axis of the line laser sensor (5) to the Z5+x2 position. p All axis measurements are 0; keep the position of the line laser sensor (5) unchanged, rotate the irregular antenna cover (9) clockwise by 10°, and record the line laser sensor (5) readings and their corresponding C coordinates during the rotation; after the rotation is completed, find the minimum value of the z value corresponding to the x-axis in the measurement data of the line laser sensor (5), and find the coordinate values ​​X6, Z6 and C6 of the machine tool grating ruler at this time. Then, the C-axis coordinates of the workpiece's C-axis zero point in the machine tool coordinate system at this time are: C 罩 =C6-30。 2. The tool setting method for a multi-station machine tool according to claim 1, characterized in that: The included angle α ranges from 45° to 75°.

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