CN118024119A - Sealing ring constant force polishing equipment and method - Google Patents
Sealing ring constant force polishing equipment and method Download PDFInfo
- Publication number
- CN118024119A CN118024119A CN202410378318.7A CN202410378318A CN118024119A CN 118024119 A CN118024119 A CN 118024119A CN 202410378318 A CN202410378318 A CN 202410378318A CN 118024119 A CN118024119 A CN 118024119A
- Authority
- CN
- China
- Prior art keywords
- axis
- moving platform
- polishing
- sealing ring
- linear moving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005498 polishing Methods 0.000 title claims abstract description 127
- 238000007789 sealing Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 47
- 230000003068 static effect Effects 0.000 claims abstract description 8
- 238000003754 machining Methods 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 10
- 238000013459 approach Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008713 feedback mechanism Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses sealing ring constant force polishing equipment and a sealing ring constant force polishing method. And after laser processing of the sealing ring, polishing is performed on the micro-step generated on the end face of the static ring, four-axis linkage is adopted, so that the excircle flexible polishing wheel moves along the circumferential outline of the micro-step, the force transducer measures the polishing pressure of the excircle flexible polishing wheel in real time, the polishing pressure is transmitted to the Z-axis servo motor through the numerical control system, the Z-axis servo motor drives the ball screw, the position of the sealing ring is adjusted, and the constant polishing pressure is ensured. The invention has the advantages that after the laser processing of the sealing ring, the polishing processing of the inclined corrugated surface with high surface shape precision and low surface roughness can be realized, so that the hydrodynamic sealing performance of the nuclear main pump sealing ring is ensured.
Description
Technical Field
The invention belongs to the technical field of complex surface polishing, and particularly relates to sealing ring constant force polishing equipment and a sealing ring constant force polishing method.
Technical Field
The nuclear main pump is one of the most important large-scale equipment which ensures the controllable and continuous progress of the nuclear fission chain reaction in the nuclear power station, and is also known as the heart of the nuclear power station, and the sealing ring is a key component for the shaft end sealing of the nuclear main pump, so that the surface shape precision and the surface roughness of the nuclear main pump are extremely strict. The fluid dynamic pressure sealing ring with the equal inclination corrugated surface consists of a corrugated surface and a flat dam surface, wherein the inclination angles of radial contour lines are equal, the circumferential periodicity of the corrugated surface and the flat dam surface are changed in a fluctuating manner, and the included angle between the radial contour lines and the flat dam surface is called the equal inclination angle. Because of the small gap between the hydrodynamic sealing pairs, the surface shape accuracy of the corrugated surface of the sealing ring requires 1-2 helium bands, namely 0.29-0.58 μm. The stationary ring is a seal that does not rotate with the shaft, the moving ring is a seal that rotates with the shaft, and the surface roughness Ra of the seal ring is required to be within 5nm in order to ensure that continuous low and instantaneous high speed contact of the moving ring and the stationary ring does not cause excessive wear between the surfaces.
As shown in fig. 4-5, the seal ring is generally made of high-hardness materials such as silicon carbide, tungsten carbide and the like, and is inlaid by a metal ring seat 16 and a static ring 15, wherein the static ring 15 is composed of a corrugated surface 17 and a flat dam surface 18, the corrugated surface 17 is a space free curved surface, a static ring blank is firstly subjected to laser machining along the circumferential outline of a theoretical corrugated surface 17 during laser machining, a first step is subjected to laser machining, and then a second step with the same depth is subjected to laser machining on the basis of the first step until the second step is machined to the lowest point of the corrugated surface, and the depth and the interval of each step are small, so that the blank is called a micro step. After the corrugated surface 17 with the micro steps is processed by laser, the surface shape precision and the surface roughness can not meet the requirements, and the high-precision processing of the optical curved surface can be realized by computer-controlled optical surface shaping technologies such as air bag polishing, magnetorheological polishing, ion beam polishing and the like, but the processing efficiency is low, the cost is high and the problem of edge effect exists in processing annular parts when the laser is applied to sealing ring polishing. The existing sealing ring polishing equipment lacks a force feedback mechanism, and can not ensure that the material removal rates at all positions of the corrugated surface are consistent, so that high surface shape accuracy can not be ensured.
Disclosure of Invention
The invention aims to provide constant force polishing equipment and method for a sealing ring, which can realize the polishing processing of the constant inclined corrugated surface fluid dynamic pressure sealing ring with high surface shape precision and low surface roughness after laser processing.
The first technical scheme adopted by the invention is as follows:
A constant force polishing device for sealing rings comprises a C-axis workbench, a Z-axis linear moving platform, an X-axis linear moving platform, a Y-axis linear moving platform, an excircle flexible polishing wheel, an electric spindle and a force transducer;
the C-axis workbench is used for clamping the sealing ring and driving the sealing ring to rotate around the rotation axis of the C-axis workbench.
The C-axis workbench is arranged on the C-axis turntable through screws, and the C-axis turntable drives the C-axis workbench to perform rotary motion.
The C-axis turntable is arranged on a Z-axis linear moving platform through a connecting plate, and the Z-axis linear moving platform is fixed on the lathe bed.
The excircle flexible polishing wheel is arranged on the motorized spindle and performs rotary motion around the rotary axis of the motorized spindle.
The electric spindle is fixed on the upper connecting plate through a screw, and the upper connecting plate is connected with a force measuring hole of the force measuring sensor through a screw.
The force transducer is connected with a lower connecting plate through a screw, and the lower connecting plate is connected with an X-axis linear movement platform through a screw. The X-axis linear moving platform is arranged on the Y-axis linear moving platform, the moving direction of the X-axis linear moving platform is mutually perpendicular to the moving direction of the Y-axis linear moving platform, and the Y-axis linear moving platform is fixed on the bed body.
Further, the sealing ring is clamped on the C-axis workbench.
Further, the repeated positioning precision of the C-axis workbench is +/-0.004 degrees; the Z-axis linear moving platform adopts a wedge-shaped speed reduction structure, the speed reduction ratio is 1:2, and the positioning accuracy is 1 mu m; the radial and axial runout of the excircle flexible polishing wheel is 0-0.1 mu m, and the rotating speed of the electric spindle is 50-5000 rpm.
A constant force polishing method for a four-axis linkage sealing ring utilizes the constant force polishing equipment for polishing, and comprises the following steps:
A. Before machining, point cloud data projected on a two-dimensional plane by the micro-step circumferential profile of the corrugated surface of the sealing ring are extracted, and the point cloud data are processed into NC codes for controlling four-axis linkage of an X-axis linear moving platform, a Y-axis linear moving platform, a Z-axis linear moving platform and a C-axis workbench through data processing.
B. After the numerical control system is started, starting up and zero searching operation is carried out, zero point switches of all axes are searched according to the sequence of Y axis-X axis-Z axis-C axis, all axes automatically move to the fixed reference point position after zeroing, and then NC codes are copied to the numerical control system.
C. and clamping the sealing ring on a C-axis workbench, selecting the center position of the upper end surface of the stationary ring as an origin, and setting a workpiece coordinate system.
D. Through four-axis linkage, the excircle flexible polishing wheel is driven to periodically move along the circumferential outline of the micro-step of the corrugated surface of the sealing ring all the time, and the micro-step is finished after the sealing ring rotates for 360 degrees.
According to the processing of the corrugated surface contour information data, processing data of a processing starting point of a first micro-step are obtained, when the next micro-step is processed after the processing of the first micro-step circumferential contour is completed, the outer circle flexible polishing wheel moves to the processing starting point of the next micro-step through linkage of the Y-axis linear moving platform and the Z-axis linear moving platform, and then the outer circle flexible polishing wheel continues to move along the next micro-step circumferential contour until all the micro-steps are processed.
In the machining process, polishing pressure is transmitted to a strain type force transducer through an excircle flexible polishing wheel, an electric spindle and an upper connecting plate, a numerical control system collects pressure information, then the actual polishing pressure is compared with ideal polishing pressure, if the actual polishing pressure is larger than the ideal polishing pressure, a ball screw is driven by a Z-axis servo motor, so that a Z-axis linear moving platform moves downwards, the back cutting amount of the excircle flexible polishing wheel is reduced, the actual polishing pressure is reduced, and the polishing pressure approaches to the ideal polishing pressure; if the actual polishing pressure is smaller than the ideal polishing pressure, the ball screw is driven by the Z-axis servo motor, so that the Z-axis linear moving platform moves upwards, the back cutting amount of the excircle flexible polishing wheel is increased, and the actual polishing pressure is increased and approaches to the ideal polishing pressure.
The second technical scheme adopted by the invention is as follows:
The constant force polishing equipment for the sealing ring further comprises an inclination angle adjusting device, wherein the inclination angle adjusting device comprises a bracket, a linear laser sensor, an inclined wedge, a screw rod, a speed reducer and an inclination angle adjusting motor;
the bracket is fixed on the Z-axis linear moving platform and is used for installing a line laser sensor;
The linear laser sensor projects laser to the upper end face of the stationary ring by using a transmitter, when the sealing ring rotates, real-time measurement data of the upper end face of the stationary ring are obtained, and the real-time C-axis workbench dip angle is obtained through data processing;
the inclination angle adjusting motor is fixed on the Z-axis linear moving platform and is connected with the input end of the speed reducer through a coupler;
the output end of the speed reducer is connected with a screw rod through a coupler, and the screw rod drives the wedge to move through threads;
The inclined wedge is matched with the inclined plane on the connecting plate, the connecting plate is driven to incline when the inclined wedge moves, the C-axis turntable and the C-axis workbench incline, the sealing ring inclines, and the corrugated surface is converted into a straight line parallel to the axis of the excircle flexible polishing wheel through the inclination angles of the inclined sealing ring and the like.
Further, the gradient ratio of the wedge is 1:10.
A constant force polishing method for a four-axis linkage sealing ring utilizes the constant force polishing equipment for polishing, and comprises the following steps:
A. Before machining, extracting three-dimensional point cloud data of a corrugated surface of the sealing ring, processing the point cloud data into NC codes for controlling linkage of a Z-axis linear moving platform and a C-axis workbench through data processing, and then adding NC codes for reciprocating motion of a Y-axis linear moving platform.
B. After the numerical control system is started, starting up and zero searching operation is carried out, zero point switches of all axes are searched according to the sequence of Y axis-X axis-Z axis-C axis, all axes automatically move to the fixed reference point position after zero setting, and then the horizontal inclination angle of the C axis workbench is adjusted to be equal-inclination angle through an inclination angle adjusting device. The NC code is then copied to the numerical control system.
C. and clamping the sealing ring on a C-axis workbench, selecting the center position of the upper end surface of the stationary ring as an origin, and setting a workpiece coordinate system.
D. And through linkage control of the Z-axis linear moving platform and the C-axis workbench, the Y-axis linear moving platform reciprocates, the corrugated surface is polished by the flexible polishing wheel on the outer circle, and once processing is completed when the sealing ring rotates for 360 degrees.
In the processing process, the linear laser sensor utilizes the transmitter to project laser to the upper end face of the stationary ring, when the sealing ring rotates, real-time measurement data of the upper end face of the stationary ring are obtained, and the real-time C-axis workbench dip angle is obtained through data processing. And comparing the actual inclination angle of the C-axis workbench with the ideal inclination angle of the C-axis workbench, if the relative error between the inclination angle of the C-axis workbench and the ideal inclination angle of the C-axis workbench is larger than 1%, driving a screw rod through an inclination angle adjusting motor to drive a wedge to move, adjusting the inclination angle of a connecting plate, and further adjusting the inclination angle of the C-axis workbench until the relative error between the inclination angle of the C-axis workbench and the inclination angle of the ideal C-axis workbench is smaller than 1%, and adjusting polishing force while adjusting the inclination angle in real time to ensure constant force polishing of a corrugated surface.
Compared with the prior art, the invention has the following beneficial effects:
1. In the four-axis linkage machining process, the polishing force is kept constant due to the polishing pressure feedback mechanism, so that the material removal rate at each position of the micro-step of the corrugated surface is the same, the machining state is stable, and the surface shape precision of the sealing ring is guaranteed.
2. According to the invention, for polishing the micro-step of the corrugated surface, X-Y-Z-C four-axis linkage processing is adopted, and the excircle flexible polishing wheel can polish along the circumferential profile of the micro-step at a high linear speed, so that the processing efficiency is improved while the high surface shape precision and the low surface roughness are ensured.
3. Aiming at the geometric characteristics of inclination angles such as the fluid dynamic pressure sealing ring of the constant inclination corrugated surface, the invention adopts a method for adjusting the inclination angle of the main shaft of the workpiece, can convert a machining mode needing complex interpolation into a simple machining mode needing only the linkage of the Z-axis linear moving platform and the C-axis worktable and the reciprocating motion of the Y-axis linear moving platform, and reduces the difficulty of numerical control interpolation motion when polishing the corrugated surface.
Drawings
Fig. 1 is an overall schematic diagram of an apparatus according to a first embodiment of the present invention.
Fig. 2 is an overall schematic diagram of the apparatus of the second embodiment of the present invention.
FIG. 3 is a schematic view of the workpiece spindle inclination adjustment of the present invention.
FIG. 4 is an overall view of the seal ring of the present invention.
Fig. 5 is an enlarged view at a of fig. 4.
Fig. 6 is a process flow diagram of the present invention.
In the figure: 1. a seal ring; 2. a C-axis workbench; 3. a Z-axis servo motor; 4. a connecting plate; 5. a Z-axis linear moving platform; 6. a C-axis turntable; 7. an outer circle flexible polishing wheel; 8. an electric spindle; 9. an upper connecting plate; 10. a load cell; 11. a lower connecting plate; 12. an X-axis linear movement platform; 13. a Y-axis linear moving platform; 14. a bed body; 15. a stationary ring; 16. a metal ring seat; 17. a corrugated surface; 18. a flat dam surface; 19. a bracket; 20. a line laser sensor; 21. wedge; 22. a speed reducer; 23. an inclination angle adjusting motor; 24. and a screw rod.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1-6, the sealing ring constant force polishing device comprises a C-axis workbench 2, a Z-axis linear moving platform 5, an X-axis linear moving platform 12, a Y-axis linear moving platform 13, an outer circle flexible polishing wheel 7, an electric spindle 8 and a force transducer 10;
The C-axis workbench 2 is used for clamping the sealing ring 1 and driving the sealing ring 1 to do rotary motion around the rotary axis of the C-axis workbench 2.
The C-axis workbench 2 is arranged on the C-axis turntable 6 through screws, and the C-axis turntable 6 drives the C-axis workbench 2 to perform rotary motion.
The C-axis turntable 6 is arranged on the Z-axis linear movement platform 5 through the connecting plate 4, and the Z-axis linear movement platform 5 is fixed on the lathe bed 14.
The excircle flexible polishing wheel 7 is arranged on the motorized spindle 8 and performs rotary motion around the rotary axis of the motorized spindle 8.
The motorized spindle 8 is fixed on the upper connecting plate 9 through a screw, and the upper connecting plate 9 is connected with a force measuring hole of the force measuring sensor 10 through a screw.
The force transducer 10 is connected with a lower connecting plate 11 through a screw, and the lower connecting plate 11 is connected with an X-axis linear moving platform 12 through a screw. The X-axis linear motion stage 12 is mounted on the Y-axis linear motion stage 13, and the movement direction of the X-axis linear motion stage 12 is perpendicular to the movement direction of the Y-axis linear motion stage 13, and the Y-axis linear motion stage 13 is fixed on the bed 14.
Further, the sealing ring 1 is clamped on the C-axis workbench 2.
Further, the repeated positioning precision of the C-axis workbench 2 is +/-0.004 degrees; the Z-axis linear moving platform 5 adopts a wedge-shaped speed reduction structure, the speed reduction ratio is 1:2, and the positioning accuracy is 1 mu m; the radial and axial runout of the excircle flexible polishing wheel 7 is 0-0.1 mu m, and the rotating speed of the motorized spindle 8 is 50-5000 rpm.
A constant force polishing method for a four-axis linkage sealing ring utilizes the constant force polishing equipment for polishing, and comprises the following steps:
A. Before machining, point cloud data projected on a two-dimensional plane by the micro-step circumferential profile of the corrugated surface 17 of the sealing ring 1 are extracted, and the point cloud data are processed into NC codes for controlling four-axis linkage of the X-axis linear moving platform 12, the Y-axis linear moving platform 13, the Z-axis linear moving platform 5 and the C-axis workbench 2 through data processing.
B. After the numerical control system is started, starting up and zero searching operation is carried out, zero point switches of all axes are searched according to the sequence of Y axis-X axis-Z axis-C axis, all axes automatically move to the fixed reference point position after zeroing, and then NC codes are copied to the numerical control system.
C. And clamping the sealing ring 1 on the C-axis workbench 2, selecting the center position of the upper end surface of the stationary ring 15 as an origin, and setting a workpiece coordinate system.
D. Through four-axis linkage, the excircle flexible polishing wheel 7 is driven to periodically move along the circumferential outline of the micro-step of the corrugated surface 17 of the sealing ring 1 all the time, and the micro-step is finished after the sealing ring 1 rotates for 360 degrees.
According to the processing of the contour information data of the corrugated surface 17, processing data of a processing starting point of a first micro-step are obtained, when the next micro-step is processed after the processing of the circumferential contour of the first micro-step is completed, the outer circle flexible polishing wheel 7 moves to the processing starting point of the next micro-step through the linkage of the Y-axis linear moving platform 13 and the Z-axis linear moving platform 5, and then the outer circle flexible polishing wheel 7 continues to move along the circumferential contour of the next micro-step until all the micro-steps are processed.
In the machining process, polishing pressure is transmitted to a strain type force transducer 10 through an excircle flexible polishing wheel 7, an electric spindle 8 and an upper connecting plate 9, a numerical control system collects pressure information, then the actual polishing pressure is compared with ideal polishing pressure, if the actual polishing pressure is larger than the ideal polishing pressure, a ball screw is driven by a Z-axis servo motor 3, so that a Z-axis linear moving platform 5 moves downwards, the back cutting amount of the excircle flexible polishing wheel 7 is reduced, the actual polishing pressure is reduced, and the polishing pressure approaches to the ideal polishing pressure; if the actual polishing pressure is smaller than the ideal polishing pressure, the ball screw is driven by the Z-axis servo motor 3, so that the Z-axis linear moving platform 5 moves upwards, the back draft of the excircle flexible polishing wheel 7 is increased, and the actual polishing pressure is increased and approaches to the ideal polishing pressure.
The second technical scheme adopted by the invention is as follows:
The sealing ring constant force polishing equipment further comprises an inclination angle adjusting device, wherein the inclination angle adjusting device comprises a bracket 19, a linear laser sensor 20, an inclined wedge 21, a screw rod 24, a speed reducer 22 and an inclination angle adjusting motor 23;
the bracket 19 is fixed on the Z-axis linear moving platform 5 and is used for installing a line laser sensor 20;
The line laser sensor 20 projects laser to the upper end face of the stationary ring 15 by using a transmitter, when the sealing ring 1 rotates, real-time measurement data of the upper end face of the stationary ring 15 are obtained, and the real-time dip angle of the C-axis workbench 2 is obtained through data processing;
The dip angle adjusting motor 23 is fixed on the Z-axis linear moving platform 5 and is connected with the input end of the speed reducer 22 through a coupler;
The output end of the speed reducer 22 is connected with a screw rod 24 through a coupler, and the screw rod 24 drives the wedge 21 to move through threads;
The inclined wedge 21 is matched with an inclined plane on the connecting plate 4, when the inclined wedge 21 moves, the connecting plate 4 is driven to incline, the C-axis turntable 6 and the C-axis worktable 2 incline, the sealing ring 1 inclines, and the contact area of the corrugated surface 17 and the excircle flexible polishing wheel 7 is converted into a straight line parallel to the axis of the excircle flexible polishing wheel 7 through the inclination angles of the sealing ring 1 and the like.
Further, the gradient ratio of the wedge 21 is 1:10.
A constant force polishing method for a four-axis linkage sealing ring utilizes the constant force polishing equipment for polishing, and comprises the following steps:
C. before machining, three-dimensional point cloud data of the corrugated surface 17 of the sealing ring 1 are extracted, the point cloud data are processed into NC codes for controlling the linkage of the Z-axis linear moving platform 5 and the C-axis workbench 2 through data processing, and then NC codes for the reciprocating motion of the Y-axis linear moving platform 13 are added.
D. After the numerical control system is started, starting up and zero searching operation is carried out, zero point switches of all axes are searched according to the sequence of Y axis-X axis-Z axis-C axis, all axes automatically move to the fixed reference point position after zero setting, and then the horizontal inclination angle of the C axis workbench 2 is adjusted to be equal-inclination angle through an inclination angle adjusting device. The NC code is then copied to the numerical control system.
C. And clamping the sealing ring 1 on the C-axis workbench 2, selecting the center position of the upper end surface of the stationary ring 15 as an origin, and setting a workpiece coordinate system.
D. Through the linkage control of the Z-axis linear moving platform 5 and the C-axis workbench 2, the Y-axis linear moving platform 13 reciprocates, the flexible polishing wheel 7 of the excircle polishes the corrugated surface 17, and once processing is completed when the sealing ring 1 rotates for 360 degrees.
In the processing process, the linear laser sensor 20 projects laser to the upper end face of the stationary ring 15 by using a transmitter, when the sealing ring 1 rotates, measurement data of the upper end face of the stationary ring 15 are obtained in real time, and the inclination angle of the real-time C-axis workbench 2 is obtained through data processing. And comparing the actual inclination angle of the C-axis workbench 2 with the ideal inclination angle of the C-axis workbench 2, if the relative error between the inclination angle of the C-axis workbench 2 and the ideal inclination angle of the C-axis workbench 2 is larger than 1%, driving the screw rod 24 through the inclination angle adjusting motor 23 to drive the inclined wedge 21 to move, adjusting the inclination angle of the connecting plate 4, and further adjusting the inclination angle of the C-axis workbench 2 until the relative error between the inclination angle of the C-axis workbench 2 and the ideal inclination angle of the C-axis workbench 2 is smaller than 1%, adjusting the polishing force while adjusting the inclination angle in real time, and guaranteeing constant force polishing of the corrugated surface 17.
The present invention is not limited to the present embodiment, and any equivalent concept or modification within the technical scope of the present invention is listed as the protection scope of the present invention.
Claims (5)
1. A sealing ring constant force polishing device, characterized in that: the polishing device comprises a C-axis workbench (2), a Z-axis linear moving platform (5), an X-axis linear moving platform (12), a Y-axis linear moving platform (13), an excircle flexible polishing wheel (7), an electric spindle (8) and a load cell (10);
the C-axis workbench (2) is used for clamping the sealing ring (1) and driving the sealing ring (1) to do rotary motion around the rotary axis of the C-axis workbench (2);
The C-axis workbench (2) is arranged on the C-axis turntable (6) through screws, and the C-axis turntable (6) drives the C-axis workbench (2) to do rotary motion;
the C-axis turntable (6) is arranged on the Z-axis linear moving platform (5) through a connecting plate (4), and the Z-axis linear moving platform (5) is fixed on the lathe bed (14);
the excircle flexible polishing wheel (7) is arranged on the motorized spindle (8) and performs rotary motion around the rotary axis of the motorized spindle (8);
The electric spindle (8) is fixed on the upper connecting plate (9) through a screw, and the upper connecting plate (9) is connected with a force measuring hole of the force measuring sensor (10) through a screw;
The force transducer (10) is connected with the lower connecting plate (11) through a screw, and the lower connecting plate (11) is connected with the X-axis linear moving platform (12) through a screw; the X-axis linear moving platform (12) is arranged on the Y-axis linear moving platform (13), the moving direction of the X-axis linear moving platform (12) is perpendicular to the moving direction of the Y-axis linear moving platform (13), and the Y-axis linear moving platform (13) is fixed on the lathe bed (14).
2. A seal ring constant force polishing apparatus as defined in claim 1, wherein: the sealing ring (1) is clamped on the C-axis workbench (2).
3. A seal ring constant force polishing method using the seal ring constant force polishing apparatus of claim 1, comprising the steps of:
A. Before machining, extracting point cloud data projected on a two-dimensional plane by a micro-step circumferential profile of a corrugated surface (17) of a sealing ring (1), and processing the point cloud data into NC codes for controlling four-axis linkage of an X-axis linear moving platform (12), a Y-axis linear moving platform (13), a Z-axis linear moving platform (5) and a C-axis workbench (2) through data processing;
B. After the numerical control system is started, starting up and zero searching operation is carried out, each axis zero point switch is searched according to the sequence of Y axis-X axis-Z axis-C axis, each axis automatically moves to a fixed reference point position after zero setting, and then NC codes are copied to the numerical control system;
C. clamping the sealing ring (1) on a C-axis workbench (2), then selecting the center position of the upper end surface of a static ring (15) as an origin, and setting a workpiece coordinate system;
D. The excircle flexible polishing wheel (7) is driven to periodically move along the circumferential outline of the micro-step of the corrugated surface (17) of the sealing ring (1) all the time through four-axis linkage, and the processing of one micro-step is completed when the sealing ring (1) rotates for 360 degrees;
According to the processing of the contour information data of the corrugated surface (17), processing data of a processing starting point of a first micro-step are obtained, when the next micro-step is processed after the processing is completed along the circumferential contour of the first micro-step, the outer circle flexible polishing wheel (7) moves to the processing starting point of the next micro-step through the linkage of the Y-axis linear moving platform (13) and the Z-axis linear moving platform (5), and then the outer circle flexible polishing wheel (7) continues to move along the circumferential contour of the next micro-step until all the micro-steps are processed;
In the machining process, polishing pressure is transmitted to a strain type force transducer (10) through an excircle flexible polishing wheel (7), an electric spindle (8) and an upper connecting plate (9), a numerical control system collects pressure information, then the actual polishing pressure is compared with ideal polishing pressure, if the actual polishing pressure is larger than the ideal polishing pressure, a ball screw is driven by a Z-axis servo motor (3), so that a Z-axis linear moving platform (5) moves downwards, the back cutting amount of the excircle flexible polishing wheel (7) is reduced, the actual polishing pressure is reduced, and the polishing pressure approaches to the ideal polishing pressure; if the actual polishing pressure is smaller than the ideal polishing pressure, the ball screw is driven by the Z-axis servo motor (3), so that the Z-axis linear moving platform (5) moves upwards, the back cutting amount of the excircle flexible polishing wheel (7) is increased, and the actual polishing pressure is increased and approaches to the ideal polishing pressure.
4. A seal ring constant force polishing apparatus as defined in claim 1, wherein: the device also comprises an inclination angle adjusting device, wherein the inclination angle adjusting device comprises a bracket (19), a linear laser sensor (20), an inclined wedge (21), a screw rod (24), a speed reducer (22) and an inclination angle adjusting motor (23);
The bracket (19) is fixed on the Z-axis linear moving platform (5) and is used for installing a line laser sensor (20);
the linear laser sensor (20) projects laser to the upper end face of the stationary ring (15) by utilizing a transmitter, when the sealing ring (1) rotates, measurement data of the upper end face of the stationary ring (15) are obtained in real time, and the inclination angle of the real-time C-axis workbench (2) is obtained through data processing;
The inclination angle adjusting motor (23) is fixed on the Z-axis linear moving platform (5) and is connected with the input end of the speed reducer (22) through a coupler;
The output end of the speed reducer (22) is connected with a screw rod (24) through a coupler, and the screw rod (24) drives the wedge (21) to move through threads;
The inclined wedge (21) is matched with an inclined plane on the connecting plate (4), when the inclined wedge (21) moves, the connecting plate (4) is driven to incline, the C-axis turntable (6) and the C-axis workbench (2) incline, the sealing ring (1) incline, and the corrugated surface (17) and the contact area of the excircle flexible polishing wheel (7) are converted into a straight line parallel to the axis of the excircle flexible polishing wheel (7) through the inclination angles of the inclined sealing ring (1).
5. A seal ring constant force polishing method using a seal ring constant force polishing apparatus according to claim 4, comprising the steps of:
A. Before machining, extracting three-dimensional point cloud data of a corrugated surface (17) of a sealing ring (1), processing the point cloud data into NC codes for controlling linkage of a Z-axis linear moving platform (5) and a C-axis workbench (2) through data processing, and then adding NC codes for reciprocating motion of a Y-axis linear moving platform (13);
B. After a numerical control system is started, starting up and zero searching operation is carried out, zero point switches of all axes are searched according to a sequence of Y-axis, X-axis, Z-axis and C-axis, all axes automatically move to a fixed reference point position after zeroing, and then the horizontal inclination angle of a C-axis workbench (2) is adjusted to be an angle with equal inclination angle through an inclination angle adjusting device; copying NC codes to a numerical control system;
C. clamping the sealing ring (1) on a C-axis workbench (2), then selecting the center position of the upper end surface of a static ring (15) as an origin, and setting a workpiece coordinate system;
D. the corrugated surface (17) is polished by the flexible polishing wheel (7) on the outer circle through linkage control of the Z-axis linear moving platform (5) and the C-axis workbench (2) and the Y-axis linear moving platform (13) to reciprocate, and once processing is completed when the sealing ring (1) rotates for 360 degrees;
In the processing process, a linear laser sensor (20) projects laser to the upper end face of a static ring (15) by utilizing a transmitter, when a sealing ring (1) rotates, measurement data of the upper end face of the static ring (15) are obtained in real time, and the inclination angle of a real-time C-axis workbench (2) is obtained through data processing; and comparing the inclination angle of the actual C-axis workbench (2) with the inclination angle of the ideal C-axis workbench (2), if the relative error between the inclination angle of the C-axis workbench (2) and the inclination angle of the ideal C-axis workbench (2) is larger than 1%, driving a screw rod (24) through an inclination angle adjusting motor (23) to drive a wedge (21) to move, adjusting the inclination angle of a connecting plate (4), and further adjusting the inclination angle of the C-axis workbench (2) until the relative error between the inclination angle of the C-axis workbench (2) and the inclination angle of the ideal C-axis workbench (2) is smaller than 1%, and adjusting the polishing force while adjusting the inclination angle in real time to ensure constant polishing of the corrugated surface (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410378318.7A CN118024119A (en) | 2024-03-29 | 2024-03-29 | Sealing ring constant force polishing equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410378318.7A CN118024119A (en) | 2024-03-29 | 2024-03-29 | Sealing ring constant force polishing equipment and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118024119A true CN118024119A (en) | 2024-05-14 |
Family
ID=91004354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410378318.7A Pending CN118024119A (en) | 2024-03-29 | 2024-03-29 | Sealing ring constant force polishing equipment and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118024119A (en) |
-
2024
- 2024-03-29 CN CN202410378318.7A patent/CN118024119A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20230250501A1 (en) | Robot machining system and control method for ultrasonic surface rolling process of aircraft engine blade | |
| CN101983838B (en) | Milling, grinding and polishing device based on intelligent numerically-controlled platform | |
| CN101386150B (en) | Numerical control polishing machine for optical elements | |
| JP2927954B2 (en) | Computer controlled grinder for making objects with complex shapes. | |
| CN109158617B (en) | Method for generating free-form surface turning tool path by control point driving projection | |
| CN100534707C (en) | Method and device of processing the contacting surface of the digital controlled lines | |
| CN201283534Y (en) | Numerical control polishing machine tool | |
| CN1491764A (en) | Digital control working machine with grinder | |
| CN102756316A (en) | Ultra-precise processing integrated platform for large caliber optical mirror surface | |
| CN111055135A (en) | Multi-degree-of-freedom numerical control rotary table | |
| CN112317776A (en) | Novel numerical control polyhedron center | |
| Mizugaki et al. | Development of metal-mold polishing robot system with contact pressure control using CAD/CAM data | |
| JP3426132B2 (en) | Machining non-axisymmetric aspheric surface | |
| US5181442A (en) | Device for machining a non-circular sectioned workpiece | |
| JPS60228063A (en) | Polishing device for generating curved surface | |
| JP4576255B2 (en) | Tool whetstone shape creation method | |
| CN212020412U (en) | Special automatic honing machine for processing compressor piston | |
| CN220659453U (en) | High-precision grinding machine for machining internal threads | |
| CN118024119A (en) | Sealing ring constant force polishing equipment and method | |
| CN219402882U (en) | Five-axis laser processing equipment with cutter transversely clamped | |
| CN112267111A (en) | Laser cladding device and method for shield machine hob ring | |
| CN116475906A (en) | Machining center with vertical and horizontal grinding double grinding heads | |
| CN115365646A (en) | Five laser beam machining machines | |
| CN113386015B (en) | Multi-axis motion and series manipulator compound drive four-mirror polishing machine tool | |
| CN113601257A (en) | Microstructure array processing device and method based on variable-pitch fly cutter cutting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |