Tool setting method of multi-station machine tool

Abstract

The invention discloses a tool setting method of a multi-station machine tool. The tool setting method comprises the following steps that tool setting is conducted through a line laser sensor; grinding wheel tool setting; and performing tool setting on the special-shaped antenna housing. The multi-station machine tool comprises a Z-direction moving module, a line laser sensor, an X-direction moving module, a side milling head, a grinding wheel, a center supporting rod, an acoustic emission sensor, a feeler block and a C-axis rotating module. The upper structure of the lathe bed comprises an inclined plane and a horizontal plane. Measurement and machining integration can be carried out, machining errors caused by multiple times of clamping are avoided, only one-time alignment and tool setting are needed, and the machining efficiency is improved. According to the tool setting method, automation can be achieved, and personal errors caused by manual alignment and tool setting are reduced to a great extent. According to the method, the accurate coordinates of the tool setting points of the line laser sensor, the grinding wheel and the special-shaped antenna housing can be accurately found in the machine tool coordinate system, and the line laser sensor, the grinding wheel and the special-shaped antenna housing are connected with the machine tool coordinate system, so that later high-precision machining is achieved.

Description

Technical Field

[0001] The invention relates to a multi-station machine tool, in particular to a tool setting method for the multi-station machine tool. Background Art

[0002] The radome is a shell or cover used to protect and isolate the antenna. It is mainly used to protect the antenna inside the antenna system from the harsh external environment and reduce electromagnetic interference with the surrounding environment. It is currently widely used in various guidance and radar systems. The radome not only plays a role in protecting the antenna, but also has good wave transmission performance. The thickness of the cover wall is an important factor affecting its electrical performance parameters. In addition, the outer contour of the radome has a great influence on the stability and aiming accuracy of some guidance systems. Therefore, in order to make the wall thickness and outer contour shape of the radome meet its use requirements, it is necessary to achieve high-precision processing of the outer contour surface of the radome.

[0003] At present, the processing and measurement of the radome are usually carried out separately in the factory. The surface of the radome is ground on a machine tool. After processing, the radome is disassembled and placed on a dedicated large-scale measuring equipment such as a three-coordinate machine for measurement to detect whether its size meets the requirements. If it does not meet the requirements, the radome needs to be re-clamped on the machine tool for processing, and this process is repeated until the parameters such as the size and electrical performance of the radome meet the requirements. However, this processing method is time-consuming and labor-intensive, and will cause large processing and measurement errors due to repeated clamping. At present, with the continuous improvement of the processing accuracy requirements of the radome, it is necessary to use equipment that can integrate measurement and processing, so that the radome can be measured and ground on the machine without repeated clamping. In order to realize the integration of high-precision measurement and processing of equipment, high-precision tool setting is particularly important.

[0004] Due to factors such as the outer profile shape and size of the special-shaped antenna cover, the X-axis of the machine tool has a minimum travel range of 500mm. If a common flat bed structure is adopted, the overall size of the machine tool will become larger, and the production cost of the machine tool itself will also increase. Therefore, in order to reduce costs and make the X-axis travel of the machine tool meet the requirements, the machine tool structure adopts an inclined bed type. However, due to the inclination of the bed, compared with traditional horizontal bed machine tools, when positioning the tool, the operator needs to pay more attention to the relative position relationship between the tool and the workpiece to ensure the processing accuracy. In addition, there is little research on tool setting methods for inclined bed machine tools with measuring modules, and it is necessary to explore tool setting methods for inclined bed multi-station machine tools.

[0005] The existing method needs to determine the accurate coordinate values ​​of the tool setting points of the measurement module and the processing module in the machine tool during tool setting, so that it can achieve high-precision matching between the measurement point and the processing point. Currently, this integrated measurement and processing tool setting method is usually implemented manually. For the tool setting of the measurement module, its accuracy depends largely on the accuracy of the sensor; however, for the tool setting of the processing module, the worker's operation is the main factor affecting its accuracy. Therefore, the worker's own experience and level will have a greater impact on the entire processing, and it is easy to have large human errors, which will make the final processing accuracy unable to be effectively guaranteed. Summary of the invention

[0006] In order to solve the above problems existing in the prior art, the present invention aims to design a tool setting method for a slant bed multi-station machine tool that can realize automation and high precision.

[0007] In order to achieve the above-mentioned object, the technical scheme of the present invention is as follows: a tool setting method for a multi-station machine tool, the multi-station machine tool comprising 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 center support rod, an acoustic emission sensor, a tool setting block and a C-axis rotating module; the upper structure of the bed comprises an inclined surface and a horizontal surface, and the angle between the inclined surface and the horizontal surface is α;

[0008] The Z-axis moving module is installed on the inclined surface of the bed, and the X-axis moving module is installed on the Z-axis moving module; the tail top mechanism is installed on the left side of the horizontal plane of the bed, and the C-axis rotating module is installed on the right side of the horizontal plane of the bed; a special-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 installed on the X-axis moving module through a sensor fixing 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 with the rotation axis of the C-axis rotating module. The measuring 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 laser line length of the line laser sensor is 15mm.

[0010] The grinding wheel is installed on the X-axis module through the 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 surface 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 formed by butting two semicircular annular blocks, which is bolted and nested on the cylindrical surface of the central support rod; the acoustic emission sensor is fixed to the left end surface 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 circle radius r1 of the tool setting block is 50 mm, the outer circle radius r2 is 90 mm, and the thickness h1 is 50 mm;

[0012] The tool setting method comprises 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 of the coordinate system is the center of the right side of the central support rod; M The axis is parallel to the movement direction of the Z-axis moving module, and the horizontal left is Z M The positive direction of the axis; the X direction of the coordinate system M The axis is parallel to the movement direction of the X-axis moving module; the Y axis of the coordinate system M Axis perpendicular to Z M Axis and X M Axis, direction follows the right-hand rule; Z-moving module drives X-moving module to move left and right; X-moving module drives line laser sensor and grinding wheel to move up and down along X-guide rail; Set line laser sensor coordinate system o p -x p y p z p The origin is the midpoint of the laser line when the reference distance to the object is 60 mm, where x p Axis and z p The x axis is the coordinate axis of the line laser sensor measurement data itself, p The z axis is the horizontal direction of the laser line. p The axis is the emission direction of the laser from the line laser sensor;

[0015] A2. Perform the X-axis tool setting operation of the line laser sensor. Move the Z-axis moving module and the X-axis moving module by executing the program so that the entire laser line of the line laser sensor hits the Z axis on the tool setting block. p The measured readings of the axes are all 0. The coordinate values ​​of the machine tool grating ruler are recorded as X1 and Z1. When the zero point of the coordinate system of the line laser sensor coincides with the X axis of the tool reference point, the reading of the machine tool grating ruler is:

[0016] X 线 =X1-r2

[0017] A3. Perform the Z-axis tool setting operation of the line laser sensor. Move the X-axis moving module to the coordinate X1 by executing the program. At this time, 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. The other 3-4mm of the laser line exceeds the right end face of the tool setting block. At this time, the 3-4mm that exceeds the laser line is in the over-range range, and the measurement result shows no indication; record the first point with indication to the right of the laser coordinate zero point in the line laser sensor coordinate system o p -x p y p z p The coordinate value x p1 and z p1 , record the coordinate values ​​of the machine tool grating ruler at this time as X1 and Z2, then when the zero point of the coordinate system of the line laser sensor coincides with the Z axis of the tool reference point, the reading of the machine tool grating ruler is:

[0018] Z 线 =Z2+x p1

[0019] B. Grinding wheel 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 of the grinding wheel; the directions of the axes of the grinding wheel coordinate system are the same as those of the machine tool coordinate system;

[0021] B2. Perform X-axis tool setting operation on the grinding wheel. Move the Z-axis moving module and the X-axis moving module by executing the program to move the grinding wheel to the vicinity of the outer cylindrical surface of the tool setting block, and then rotate the grinding wheel at a speed of 2000r / min; make the X-axis moving module move along the positive direction of the X-axis. During the movement, use the acoustic emission sensor to detect the vibration of the tool setting block. When the grinding wheel contacts the tool setting block, the signal detected by the acoustic emission sensor exceeds the specified threshold, and the command is returned to stop the grinding wheel. The coordinate values ​​of the machine tool grating ruler at this time are recorded as X3 and Z3; then when the zero point of the grinding wheel coordinate system coincides with the X-axis of the tool setting reference point, the reading of the machine tool grating ruler is:

[0022] X 砂 =X3-r2-r0

[0023] B3. Perform Z-axis tool setting operation on the grinding wheel. Move the Z-axis moving module and the X-axis moving module by executing the program to move the grinding wheel to the right surface of the tool setting block, and then rotate the grinding wheel at 2000r / min; make the Z-axis moving module move along the positive direction of the Z axis. During the movement, use the acoustic emission sensor to detect the vibration of the tool setting block. When the grinding wheel contacts the tool setting block, the signal detected by the acoustic emission sensor exceeds the specified threshold, and the command is returned to stop the grinding wheel. The coordinate values ​​of the machine tool grating ruler at this time are recorded as X4 and Z4; then when the zero point of the grinding wheel coordinate system coincides with the Z axis of the tool setting reference point, the reading of the machine tool grating ruler is:

[0024] Z 砂 =Z4-h0

[0025] C. Tool setting for special-shaped antenna cover

[0026] C1. The special-shaped antenna cover is the workpiece of this machine tool. Its small end is constrained by the tail lift mechanism, and the large end is clamped and positioned by the flexible fixture on the fixture support plate. Assume that 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 special-shaped antenna cover and the large end surface; the workpiece coordinate system O W -X W Y W Z W The directions of the axes of the coordinate system are the same as those of the axes of the machine tool coordinate system;

[0027] C2. Perform Z-axis tool setting of the special-shaped antenna cover. Move the X-axis moving module by executing the program so that the distance between the line laser sensor and the outer surface of the special-shaped antenna cover is within the measuring range. At this time, 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 special-shaped antenna cover. The other 3-4mm of the laser line exceeds the right end face of the special-shaped antenna cover. At this time, the 3-4mm that exceeds the laser line is in the over-range range, and the measurement result shows no indication. Record the first point with indication to the right of the laser coordinate zero point in the line laser sensor coordinate system o p -x p y p z p The coordinate value x p2 and z p2 , record the coordinate value of the machine tool grating ruler as X5 and Z5, then the Z-axis coordinate of the zero point of the workpiece coordinate system in the machine tool coordinate system is:

[0028] Z 罩 =Z5+x p2

[0029] C3. Perform C-axis tool setting on the special-shaped radome. The shape of the special-shaped radome is an axisymmetric structure similar to a triangular cone, and the zero point of its C-axis is based on the horizontal position of its bottom edge. During tool setting, the special-shaped radome is first rotated to a horizontal position observed by the naked eye by executing the program, then rotated 25° clockwise, moved the Z-axis moving module to move the line laser sensor to the position of Z5+x2, and moved the X-axis moving module to move the Z axis of the line laser sensor to the position of Z5+x2. p The measured readings of the axes are all 0; keep the position of the line laser sensor unchanged, rotate the special-shaped antenna cover clockwise by 10°, and record the line laser sensor readings during the rotation and their corresponding C coordinates. After the rotation is completed, find the minimum value of the z value corresponding to the x-axis in the line laser sensor measurement data, and find the coordinate values ​​X6, Z6 and C6 of the machine tool grating ruler at this time, then the C-axis coordinate of the workpiece's C-axis zero point in the machine tool coordinate system is obtained as:

[0030] C 罩 =C6-30.

[0031] Furthermore, the angle α has a value range of 45°-75°.

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

[0033] 1. The present invention includes a measuring module and a processing module, which can integrate measurement and processing, avoid processing errors caused by multiple clamping, and only need to perform alignment and tool setting once, thereby improving processing efficiency.

[0034] 2. The tool setting method of the present invention can be automated, which greatly reduces the human errors 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, the grinding wheel, and the special-shaped antenna cover can be accurately found in the machine tool coordinate system, and the three can be connected with the machine tool coordinate system to achieve high-precision processing in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram 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-direction tool setting in step A3 of the present invention.

[0038] Figure 4 It is a schematic diagram of the X-axis tool setting of the grinding wheel in step B2 of the present invention.

[0039] Figure 5 It is a schematic diagram of the Z-direction tool setting of the grinding wheel in step B3 of the present invention.

[0040] Figure 6 It is a schematic diagram of Z-direction tool alignment of the special-shaped antenna cover in step C2 of the present invention.

[0041] Figure 7 It is a schematic diagram of the C-direction tool alignment of the special-shaped antenna cover in step C3 of the present invention.

[0042] In the figure: 1. bed; 2. tailstock mechanism; 3. Z-axis moving module; 4. sensor fixing plate; 5. line laser sensor; 6. X-axis moving module; 7. side milling head; 8. grinding wheel; 9. special-shaped antenna cover; 10. center support rod; 11. acoustic emission sensor; 12. tool setting block; 13. C-axis rotation module; 14. connecting bolts; 15. fixture support plate, 16 flexible fixture. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1-7 As shown, a tool setting method for a multi-station machine tool, 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-moving module 3 is installed on the inclined surface of the bed 1, and the X-moving module 6 is installed on the Z-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; a special-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 through 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 with the rotation axis of the C-axis rotating module 13. The measuring 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 laser line length of the line laser sensor 5 is 15mm.

[0046] The grinding wheel 8 is mounted on the X-axis moving module 6 through 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 surface 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 formed by butting two semicircular annular blocks, and is embedded in the cylindrical surface of the central support rod 10 by bolt connection; the acoustic emission sensor 11 is fixed to the left end surface 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 circle radius r1 of the tool setting block 12 is 50 mm, the outer circle radius r2 is 90 mm, and the thickness h1 is 50 mm;

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

[0049] A. Line laser sensor 5 tool setting

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

[0051] A2. Perform the X-axis tool setting operation of the line laser sensor 5. Move the Z-axis moving module 3 and the X-axis moving module 6 by executing the program so that the entire laser line of the line laser sensor 5 hits the Z axis of the tool setting block 12. p The measured readings of the axes are all 0, and the coordinate values ​​of the machine tool grating ruler are recorded as X1 and Z1. When the zero point of the coordinate system of the line laser sensor 5 coincides with the X axis of the tool 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 the 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 exceeds the right end face of the tool setting block 12. At this time, the 3-4mm that exceeds the laser line is in the over-range range, and the measurement result shows no indication. Record the first point with indication on the right side of the laser coordinate zero point in the coordinate system of the line laser sensor 5. p -x p y p z p The coordinate value x p1 and z p1 , record the coordinate values ​​of the machine tool grating ruler at this time as X1 and Z2, then when the coordinate system zero point of the line laser sensor 5 coincides with the Z axis of the tool reference point, the reading of the machine tool grating ruler is:

[0054] Z 线 =Z2+x p1

[0055] B. Grinding wheel 8 tool

[0056] B1. Set the grinding wheel 8 coordinate system O 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 the axes of the grinding wheel 8 coordinate system are the same as the directions of the axes of the machine tool coordinate system;

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

[0058] X 砂 =X3-r2-r0

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

[0060] Z 砂 =Z4-h0

[0061] C. Special-shaped antenna cover 9 tool setting

[0062] C1, the special-shaped antenna cover 9 is the workpiece of the machine tool. Its small end is constrained by the tail lift mechanism 2, and the large end is clamped and positioned by the flexible clamp on the clamp support plate. Assume that 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 special-shaped antenna cover 9 and the large end surface; the workpiece coordinate system O W -X W Y W Z W The directions of the axes of the coordinate system are the same as those of the axes of the machine tool coordinate system;

[0063] C2. Perform Z-axis tool setting of the special-shaped antenna cover 9. Move the X-axis moving module 6 by executing the program so that the distance between the line laser sensor 5 and the outer surface of the special-shaped antenna cover 9 is within the measuring 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 special-shaped antenna cover 9. The other 3-4mm of the laser line exceeds the right end face of the special-shaped antenna cover 9. At this time, the 3-4mm that exceeds the laser line is in the over-range range, and the measurement result shows no indication. Record the first point with indication 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 coordinate value x p2 2 and z p2 , record the coordinate value of the machine tool grating ruler as X5 and Z5, then the Z-axis coordinate of the zero point of the workpiece coordinate system in the machine tool coordinate system is:

[0064] Z 罩 =Z5+x p2

[0065] C3. Perform C-axis tool setting of the special-shaped antenna cover 9. The shape of the special-shaped antenna cover 9 is an axisymmetric structure similar to a triangular cone, and the zero point of its C-axis is the reference when its bottom edge is placed horizontally. During tool setting, the special-shaped antenna cover 9 is first rotated to a horizontal position observed by the naked eye by executing the program, and then rotated clockwise by 25°, moved the Z-axis moving module 3, moved the line laser sensor 5 to the position of Z5+x2, and moved the X-axis moving module 6 to move the z direction of the line laser sensor 5 to the position of Z5+x2. p The measured readings of the axes are all 0; keep the position of the line laser sensor 5 unchanged, rotate the special-shaped antenna cover 9 clockwise by 10°, and record the reading of the line laser sensor 5 during the rotation and its corresponding C coordinate. 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 coordinate of the C-axis zero point of the workpiece in the machine tool coordinate system is obtained as:

[0066] C 罩 =C6-30.

[0067] Furthermore, the angle α has a value range of 45°-75°.

[0068] The present invention is not limited to this embodiment, and any equivalent concepts or changes within the technical scope disclosed by the present invention are included in the protection scope of the present invention.

Claims

1. A tool setting method for a multi-station machine tool, characterized in that: The multi-station machine tool comprises 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) comprises an inclined surface and a horizontal surface, and the angle between the inclined surface and the horizontal surface is α; The Z-moving module (3) is mounted on the inclined surface of the bed (1), and the X-moving module (6) is mounted on the Z-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); a special-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); The line laser sensor (5) is mounted on the X-axis moving module (6) via a 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 an extension line of the emitted laser line intersects with the rotation axis of the C-axis rotating module (13); the measuring range of the line laser sensor (5) is 60±8 mm, and when the reference distance between the measured object and the line laser sensor (5) is 60 mm, the length of the laser line of the line laser sensor (5) is 15 mm; 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 surface 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 formed by butting two semicircular annular blocks and is embedded in the cylindrical surface of the central support rod (10) through bolt connection; the acoustic emission sensor (11) is fixed to the left end surface 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 circle radius r1 of the tool setting block (12) is 50 mm, the outer circle radius r2 is 90 mm, and the thickness h1 is 50 mm; The tool setting method comprises 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 of the coordinate system is the center of the right side of the central support rod (10); M The axis is parallel to the movement direction of the Z-moving module (3), and the horizontal left is Z M The positive direction of the axis; the X direction of the coordinate system M The axis is parallel to the movement direction of the X-axis moving module (6); the Y axis of the coordinate system M Axis perpendicular to Z M Axis and X M The direction of the axis follows the right-hand rule; the Z-direction moving module (3) drives the X-direction moving module (6) to move left and right; the X-direction moving module (6) drives the line laser sensor (5) and the grinding wheel (8) to move up and down along the X-direction guide rail; the coordinate system of the line laser sensor (5) is set as o p -x p y p z p The origin is the midpoint of the laser line when the reference distance to the object is 60 mm, where x p Axis and z p The axis is the coordinate axis of the line laser sensor (5) measuring the data itself, x p The z axis is the horizontal direction of the laser line. p The axis is the emission direction of the laser of the line laser sensor (5); A2. Perform the X-axis tool setting operation of the line laser sensor (5). Move the Z-axis moving module (3) and the X-axis moving module (6) by executing the program so that the entire laser line of the line laser sensor (5) hits the Z axis of the tool setting block (12). p The measured readings of the axes are all 0, and the coordinate values ​​of the machine tool grating ruler at this time are recorded as X1 and Z1. Then, when the zero point of the coordinate system of the line laser sensor (5) coincides with the X axis of the tool reference point, the reading of the machine tool grating ruler is: X 线 =X1-r2 A3. Perform the Z-axis tool setting operation of the line laser sensor (5). Move the X-axis moving module (6) to the coordinate X1 by executing the program. At this time, the length of the laser line of the line laser sensor (5) is 15 mm. Move the Z-axis moving module (3) so that 11-12 mm of the laser line hits the tool setting block (12). The other 3-4 mm of the laser line exceeds the right end face of the tool setting block (12). At this time, the 3-4 mm of the laser line that exceeds the range is in the over-range range, and the measurement result shows no indication. Record the first point with an indication to the right of the laser coordinate zero point in the coordinate system of the line laser sensor (5) o p -x p y p z p The coordinate value x p1 and z p1 , record the coordinate values ​​of the machine tool grating ruler at this time as X1 and Z2, then when the coordinate system zero point of the line laser sensor (5) coincides with the Z axis of the tool reference point, the reading of the machine tool grating ruler is: Z 线 =Z2+x p1 B. Grinding wheel (8) B1. Set the grinding wheel (8) coordinate system O G -X G Y G Z G The origin is the center position of the right side surface of the grinding wheel (8); the directions of the axes of the grinding wheel (8) coordinate system are the same as the directions of the axes of the machine tool coordinate system; B2. Perform tool setting operation on the X axis of the grinding wheel (8). Move the Z-axis moving module (3) and the X-axis moving module (6) by executing the program, so that the grinding wheel (8) moves to the vicinity of the outer cylindrical surface of the tool setting block (12), and then rotate the grinding wheel (8) at a speed of 2000 r / min; make the X-axis moving module (6) move along the positive direction of the 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 value, and a command is returned to stop the movement of the grinding wheel (8). The coordinate values ​​of the machine tool grating ruler at this time are recorded 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 tool setting operation on the Z axis of the grinding wheel (8). Move the Z-axis moving module (3) and the X-axis moving module (6) by executing the program, so that the grinding wheel (8) moves to the vicinity of the right surface of the tool setting block (12), and then rotate the grinding wheel (8) at 2000 r / min; make the Z-axis moving module (3) move along the positive direction of the 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 value, and a command is returned to stop the grinding wheel (8). The coordinate values ​​of the machine tool grating ruler at this time are recorded as X4 and Z4; then, when the zero point of the grinding wheel (8) coordinate system 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. Tool setting for special-shaped antenna cover (9) C1. The special-shaped antenna cover (9) is a workpiece to be processed by this machine tool. Its small end is constrained by the tail lift mechanism (2), and its large end is clamped and positioned by a flexible fixture on the fixture support plate. Assume that 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 position of the special-shaped antenna cover (9) and the large end surface; the workpiece coordinate system O W -X W Y W Z W The directions of the axes of the coordinate system are the same as those of the axes of the machine tool coordinate system; C2. Perform Z-axis tool setting of the special-shaped antenna cover (9). Move the X-axis moving module (6) by executing the program so that the distance between the line laser sensor (5) and the outer surface of the special-shaped antenna cover (9) is within the measuring range. At this time, the length of the laser line of the line laser sensor (5) is 15 mm. Move the Z-axis moving module (3) so that 11-12 mm of the laser line is hit on the special-shaped antenna cover (9). The other 3-4 mm of the laser line exceeds the right end surface of the special-shaped antenna cover (9). At this time, the 3-4 mm that exceeds the laser line is in the over-range range, and the measurement result shows no indication. Record the first point with indication to the right of the laser coordinate zero point in the coordinate system of the line laser sensor (5) o p -x p y p z p The coordinate value x p2 2 and z p2 , record the coordinate value of the machine tool grating ruler as X5 and Z5, then the Z-axis coordinate of the zero point of the workpiece coordinate system in the machine tool coordinate system is: Z 罩 =Z5+x p2 C3. Perform C-axis tool setting of the special-shaped antenna cover (9). The shape of the special-shaped antenna cover (9) is an axisymmetric structure similar to a triangular cone, and the zero point of its C-axis is based on the horizontal position of its bottom edge. During tool setting, the special-shaped antenna cover (9) is first rotated to a horizontal position observed by the naked eye by executing a program, and then rotated clockwise by 25°, and the Z-direction moving module (3) is moved to move the line laser sensor (5) to the position of Z5+x2, and the X-direction moving module (6) is moved to move the z direction of the line laser sensor (5) to the position of Z5+x2. p The measured readings of the axes are all 0; the position of the line laser sensor (5) is kept unchanged, and the special-shaped antenna cover (9) is rotated 10° clockwise, and the readings of the line laser sensor (5) during the rotation and the corresponding C coordinates are recorded; after the rotation is completed, the minimum value of the z value corresponding to the x-axis in the measurement data of the line laser sensor (5) is found, and the coordinate values ​​X6, Z6 and C6 of the machine tool grating ruler at this time are found, and the C-axis coordinates of the C-axis zero point of the workpiece in the machine tool coordinate system at this time are obtained as follows: C 罩 =C6-30。 2. A tool setting method for a multi-station machine tool according to claim 1, characterized in that: The angle α has a value range of 45°-75°.

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