CN108655435B - Micro-action platform of lathe and lathe system - Google Patents
Micro-action platform of lathe and lathe system Download PDFInfo
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- CN108655435B CN108655435B CN201810327719.4A CN201810327719A CN108655435B CN 108655435 B CN108655435 B CN 108655435B CN 201810327719 A CN201810327719 A CN 201810327719A CN 108655435 B CN108655435 B CN 108655435B
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- flexible hinge
- lathe
- platform
- actuator
- cover plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B29/00—Holders for non-rotary cutting tools; Boring bars or boring heads; Accessories for tool holders
- B23B29/04—Tool holders for a single cutting tool
- B23B29/12—Special arrangements on tool holders
- B23B29/125—Vibratory toolholders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
- B23Q11/0039—Arrangements for preventing or isolating vibrations in parts of the machine by changing the natural frequency of the system or by continuously changing the frequency of the force which causes the vibration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention provides a lathe micro-actuating platform (100), which comprises a platform base body (110) and a flexible hinge group; the platform base (110) comprises a fixed part (1101) and a movable part (1102); the movable portion (1102) is connected directly or indirectly to the fixed portion (1101) by one or more flexible hinge sets. The invention also provides a lathe system comprising the lathe micro-actuating platform (100). The substrate has good mechanical property, has flexibility with one degree of freedom in the micro-feeding direction, and has great rigidity in other directions; meanwhile, the invention has better dynamic performance, can quickly respond to the control signal and has larger control bandwidth.
Description
Technical Field
The invention relates to the field of lathe accessories, in particular to a lathe micro-actuation platform and a lathe system, particularly relates to a micro-actuation platform and a lathe system for vibration reduction and error compensation of a lathe tool, and particularly relates to a multifunctional micro-feeding device for vibration reduction and error compensation of the tool in the turning and boring processes of a lathe.
Background
Modern machine manufacturing technologies are moving towards high efficiency, high quality, high precision, high integration and high intelligence. Precision and ultra-precision machining technologies have become the most important component and development direction in modern machine manufacturing, and have become key technologies for improving international competitive power. Turning of metal is a traditional machining process for machine parts and is widely used in the machine manufacturing industry. The lathe is a machine tool for turning a rotating workpiece mainly by a lathe tool, is a traditional machining process of mechanical parts and is widely applied to the mechanical manufacturing industry. With the advance of China to the manufacturing strong country, the increase of the lathe efficiency, the increase of the turning precision and the reduction of the cost are necessary requirements of the mechanical manufacturing industry.
The vibration of the cutter during turning seriously affects the surface quality of a workpiece, particularly when a thin-wall workpiece is turned, the workpiece is very easy to deform in the clamping and processing process due to poor rigidity of the workpiece, and in addition, the severe vibration of the workpiece and the cutter is caused by improper selection of the cutter or overlarge cutting amount, so that the processing quality is seriously affected and even the workpiece is scrapped. The machine tool vibration restricts the improvement of the processing efficiency and the processing precision. In addition, among various errors restricting the precision of the machine tool, thermal errors and geometric errors occupy most parts, the errors are mainly characterized by slow time change, and for the system errors, an error compensation technology is gradually developed along with the continuous development of scientific technology. Therefore, by designing a micro-actuation platform, the vibration of the lathe tool is effectively inhibited, the cutting amount is increased on the premise of stable cutting of the tool and a workpiece, and the micro-actuation platform has important economic value for improving the machining efficiency; in addition, the micro-actuating platform can simultaneously carry out micro-feeding error compensation on the geometric error and the thermal error of the system, and has important application value for improving the machining precision of the lathe.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a lathe micro-actuation platform and a lathe system.
The lathe micro-actuation platform provided by the invention comprises a platform substrate and a flexible hinge group;
the platform base body comprises a fixed part and a movable part; the movable part is connected to the fixed part directly or indirectly through one or more flexible hinge sets.
Preferably, the flexible hinge set comprises one or more flexible hinges;
the plurality of flexible hinge groups comprise a first flexible hinge group, a second flexible hinge group and a third flexible hinge group which are sequentially arranged.
Preferably, the flexible hinge group comprises a flexible hinge, and the fixed part and the movable part are connected to the corrugated lever arm through the flexible hinge.
Preferably, an actuator is also included;
the fixing part forms a clamping part and a bending extension part which are connected in the length extension direction, and a stroke adjusting groove is formed in the bending extension part;
the actuator is connected to the corrugated lever arm at one end and slidably connected to the stroke adjusting groove at the other end in the axial direction.
Preferably, the width of the middle part of the corrugated lever arm along the length extension direction is larger than the width of the two ends;
the corrugated surface arranged on the corrugated lever arm comprises an end surface arranged opposite to the bending extension part;
the actuator comprises any one or more of the following structures:
-a piezoelectric actuator;
-a magnetostrictive actuator;
-an electromagnetic actuator;
-a hydraulic actuator.
Preferably, the flexible hinges included in the first flexible hinge group and the second flexible hinge group are arranged in pairs to form one or more flexible hinge pairs;
the width of the middle part of the flexible hinge pair in the length extension direction is larger than the width of the two ends, and a rounding is arranged at the width change part.
Preferably, a sensor mounting rack is arranged on the fixed part, and a motion sensor is mounted on the sensor mounting rack;
the movable part is provided with a measuring plate, and the end face of the measuring plate, which is arranged opposite to the motion sensor, forms a sensor measuring face.
Preferably, the movable part is also provided with a turning tool mounting groove; the movable part is provided with a plurality of compaction holes, and the compaction holes are communicated with the lathe tool mounting groove;
the normal direction of the first flexible hinge group and the normal direction of the second flexible hinge group are both parallel to the length extending direction of the turning tool mounting groove;
the normal direction of the third flexible hinge group is vertical to the length extending direction of the turning tool mounting groove.
Preferably, the fixing device further comprises a cover plate structure, wherein the cover plate structure is fixedly arranged on the fixing part;
the cover plate structure comprises a first cover plate and a second cover plate, and the first cover plate and the second cover plate are both provided with avoidance holes and right-angle bending parts.
The invention also provides a lathe system which comprises a controller, a turning tool piece, a square rotary tool rest and the lathe micro-actuation platform;
the motion sensor and/or the actuator are connected to the controller, the turning tool piece is installed in the turning tool installation groove, and the square rotary tool rest is tightly installed on the fixing portion.
Compared with the prior art, the invention has the following beneficial effects:
1. the substrate has good mechanical property, has flexibility with one degree of freedom in the micro-feeding direction, and has great rigidity in other directions;
2. the invention has better dynamic performance, can quickly respond to control signals and has larger control bandwidth;
3. the performance of the invention has adjustability, and the micro-actuation stroke is adjusted by changing the position of the actuator in the stroke adjusting groove and the lever amplification rate of the actuator;
4. the invention can not only respond to the dynamic control signal, but also align to the static error compensation signal, and can make corresponding micro-feeding to compensate the errors caused by temperature change, workpiece and cutter deformation, cutter abrasion and the like.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic view of a micro-motion platform of a lathe according to the present invention;
FIG. 2 is an exploded view of the assembly of the micro-actuated platform of the lathe of the present invention;
FIG. 3 is a cross-sectional view of the first or second flexible hinge set;
FIG. 4 is a schematic view of the use of the lathe system of the present invention in turning an end surface;
fig. 5 is a schematic view of the lathe system provided by the present invention in use for turning an outer circle.
The figures show that:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the lathe micro-motion platform 100 provided by the present invention includes a platform substrate 110 and a flexible hinge set, wherein the platform substrate 110 includes a fixed portion 1101 and a movable portion 1102, and the movable portion 1102 is directly or indirectly connected to the fixed portion 1101 through one or more flexible hinge sets. The movable portion 1102 is provided with a turning tool mounting groove 118 for mounting a turning tool 120, and the turning tool 120 may be, for example, an external turning tool, a cutting turning tool, a boring tool, or other types of machining tools. The end of the turning insert 120 that processes the workpiece 300 is defined as the leading end.
The flexible hinge group comprises one or more flexible hinges, and in the embodiment, the plurality of flexible hinge groups comprise a first flexible hinge group 111, a second flexible hinge group 112 and a third flexible hinge group 113 which are arranged from front to back in sequence. In addition, a corrugated lever arm 114 is further included, and the fixed part 1101 and the movable part 1102 are both connected to the corrugated lever arm 114 through a flexible hinge included in the third flexible hinge group 113. The flexible hinges included in the first flexible hinge group 111 and the second flexible hinge group 112 are arranged in pairs to form one or more flexible hinge pairs. As shown in fig. 3, the flexible hinge pair has a greater width at the middle in the length extension direction than at the two ends, and a radius is provided at the change in width to reduce stress concentration. In addition, the definition of the normal direction of the corresponding flexible hinge is also shown in fig. 3, i.e. the flexible hinge normal is perpendicular to the length extension direction. In an embodiment, the normal direction of the first flexible hinge group 111 and the normal direction of the second flexible hinge group 112 are both parallel to the length extending direction of the turning tool mounting groove 118, and the normal direction of the third flexible hinge group 113 is perpendicular to the length extending direction of the turning tool mounting groove 118.
The invention also provides an actuator 130, the fixing part 1101 forms a clamping part and a bending extension part which are connected in the length extension direction, the clamping part and the bending extension part are arranged perpendicularly, and the bending extension part is provided with a stroke adjusting groove 115. The actuator 130 is connected to the corrugated lever arm 114 at one end and slidably connected to the stroke adjustment groove 115 at the other end in the axial direction. The mounting bolt of the actuator 130 can pass through the stroke adjustment slot 115 and can move laterally, thereby changing the direction of the third flexible hinge group 113 so that the corresponding flexible hinge can transmit the actuating force acting on the corrugated lever arm 114, and finally adjusting the stroke and stiffness characteristics of the overall system of the present invention. For example: the other end of the actuator 130 moves transversely to the right, the lever amplification ratio is increased, the actuation stroke is increased, and the system rigidity is reduced; when the system moves transversely to the left, the actuating stroke is reduced, and the rigidity of the system is increased. It is recommended that the lever magnification be set at 1-8 times. The width of the middle portion of the lever arm 114 along the length extension direction is greater than the width of the two ends, and the corrugated surface provided on the lever arm 114 includes an end surface disposed opposite the bent extension portion. The corrugated surface is configured to maintain the engagement of the front ball of the actuator 130 with the corrugated lever arm 114 as the actuator 130 is stroked. Preferably, the actuator 130 comprises any one or more of the following structures: piezoelectric actuators, magnetostrictive actuators, electromagnetic actuators, hydraulic actuators, although the actuator 130 may be of other types of construction and typically provides micro-actuation in the range of tens of microns to a millimeter.
The fixed portion 1101 is provided with a sensor mounting bracket 116, and the sensor mounting bracket 116 is provided with a motion sensor 140. The movable part 1102 is provided with a measuring plate, the end face of which, arranged opposite the motion sensor 140, forms the sensor measuring face 117. In the embodiment, the sensor measuring surface 117 is disposed in front of the sensor mounting bracket 116, and the motion sensor 140 measures the position and variation of the sensor measuring surface 117 with reference to the sensor mounting bracket 116. Preferably, the motion sensor 140 may be any position sensor, such as an eddy current sensor, a hall sensor, a laser displacement sensor, an ultrasonic displacement sensor, and the like.
As shown in fig. 2, the present invention further includes a cover plate structure 150, wherein the cover plate structure 150 is tightly mounted on the fixing portion 1101. The first cover plate and the second cover plate are respectively installed on the upper side and the lower side of the fixing plate 1101 through four bolts, and it is ensured that the cover plate structure 150 does not affect the micro-motion of the movable portion 1102 and the lathe tool 120. In addition, the movable portion 1102 is provided with a plurality of compression holes, which communicate with the lathe tool mounting groove 118, and the lathe tool 120 can be fastened in the lathe tool mounting groove 118 by screwing a compression bolt into the compression holes. Preferably, the turning tool mounting groove 118 is a rectangular groove. The cover plate structure 150 comprises a first cover plate and a second cover plate, wherein avoidance holes 151 and right-angle bending portions 152 are formed in the first cover plate and the second cover plate, and the avoidance holes 151 are used for exposing the compression holes, so that the compression bolts can be conveniently installed, and the micro-motion of the movable portion 1102 is not influenced; the right angle bends 152 can cooperate to form a protective cavity for the actuator 130 therein.
The invention also provides a lathe system, as shown in fig. 4 and 5, comprising a controller 200, a turning tool piece 120, a square rotary tool rest 400 and the lathe micro-actuation platform 100, wherein the controller 200 is connected to a motion sensor 140 and an actuator 130 through a cable, the turning tool piece 120 is installed in the turning tool installation groove 118, and the square rotary tool rest 400 is tightly installed on a fixing part 1101. The controller 200 implements a control algorithm by analyzing data from the motion sensor 140 to drive the actuator 130 for vibration control and error compensation.
The use method of the invention comprises the following steps: the required turning tool is mounted in the turning tool mounting groove 118 of the movable part 1102 and fastened, and the position of the actuator 130 is adjusted so that the actuation stroke and the platform rigidity meet the requirements. The lathe fine motion table 100 is pressed against and fixed to a square turret 400 of a lathe in different manners depending on the type of machining, as shown in fig. 4 and 5. It is ensured that the motion sensor 140 and the actuator 130 are both connected to the controller 200 through cables, and the controller 200 is in the power-on state, at this time, the lathe micro-motion platform 100 is in the working state of vibration suppression and error compensation. Thereafter, efficient and highly accurate turning operations can be initiated.
According to the invention, by skillfully arranging a plurality of pairs of parallel flexible hinges, the flexibility in the movement direction is kept, and the rigidity in other movement aspects is increased as much as possible, so that the front part of the lathe micro-actuation platform 100 can meet the requirements on strength and rigidity under the action of cutting load. Under the action of the internal actuator 130, the turning tool 120 installed at the front of the micro-actuation platform 100 is driven to move through internal structure transmission and amplification, so that the effect of suppressing the tool vibration is achieved, the cutting amount of the workpiece 300 is changed, and the effect of error compensation is achieved.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (7)
1. A lathe microactuation platform (100) comprising a platform base (110) and a flexible hinge assembly;
the platform base (110) comprises a fixed part (1101) and a movable part (1102); the movable part (1102) is connected to the fixed part (1101) directly or indirectly through one or more flexible hinge sets;
the flexible hinge set comprises one or more flexible hinges;
the plurality of flexible hinge groups comprise a first flexible hinge group (111), a second flexible hinge group (112) and a third flexible hinge group (113) which are sequentially arranged;
the corrugated lever arm (114) is further included, and the fixed part (1101) and the movable part (1102) are connected to the corrugated lever arm (114) through a flexible hinge included in the third flexible hinge group (113);
further comprising an actuator (130);
the fixing part (1101) forms a clamping part and a bending extension part which are connected in the length extension direction, and a stroke adjusting groove (115) is formed in the bending extension part;
the actuator (130) is connected to the corrugated lever arm (114) at one of its axial ends and is slidably connected to the stroke adjustment groove (115) at the other end.
2. The lathe microactuation platform (100) of claim 1, wherein the width of the corrugated lever arm (114) is greater at the middle of its length extension than at both ends;
the corrugated surface provided on the corrugated lever arm (114) comprises an end surface arranged opposite the bending extension;
the actuator (130) comprises any one or more of the following structures:
-a piezoelectric actuator;
-a magnetostrictive actuator;
-an electromagnetic actuator;
-a hydraulic actuator.
3. The lathe microactuator platform (100) of claim 1 wherein the flexible hinges included in the first flexible hinge group (111) and the second flexible hinge group (112) are arranged in pairs to form one or more flexible hinge pairs;
the width of the middle part of the flexible hinge pair in the length extension direction is larger than the width of the two ends, and a rounding is arranged at the width change part.
4. The lathe microactuation platform (100) of claim 1, wherein the fixed portion (1101) is provided with a sensor mounting bracket (116), and the sensor mounting bracket (116) is provided with a motion sensor (140);
a measuring plate is arranged on the movable part (1102), and an end face of the measuring plate, which is arranged opposite to the motion sensor (140), forms a sensor measuring face (117).
5. The lathe microactuator platform (100) of claim 1 wherein the movable portion (1102) is further provided with a turning tool mounting slot (118); a plurality of pressing holes are formed in the movable part (1102), and the pressing holes are communicated with the lathe tool mounting groove (118);
the normal direction of the first flexible hinge group (111) and the normal direction of the second flexible hinge group (112) are both parallel to the length extension direction of the turning tool mounting groove (118);
the normal direction of the third flexible hinge group (113) is vertical to the length extension direction of the turning tool mounting groove (118).
6. The lathe microactuation platform (100) of claim 1, further comprising a cover plate structure (150), the cover plate structure (150) being tightly mounted on the fixed portion (1101);
the cover plate structure (150) comprises a first cover plate and a second cover plate, and the first cover plate and the second cover plate are both provided with avoidance holes (151) and right-angle bending parts (152).
7. A lathe system comprising a controller (200), a turning tool (120), a square turret (400), and a lathe microactuating platform (100) of any of claims 1 to 6;
the motion sensor (140) and/or the actuator (130) are connected to the controller (200), the turning tool element (120) is mounted in the turning tool mounting groove (118), and the square rotary tool holder (400) is tightly mounted on the fixing portion (1101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327719.4A CN108655435B (en) | 2018-04-12 | 2018-04-12 | Micro-action platform of lathe and lathe system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327719.4A CN108655435B (en) | 2018-04-12 | 2018-04-12 | Micro-action platform of lathe and lathe system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108655435A CN108655435A (en) | 2018-10-16 |
| CN108655435B true CN108655435B (en) | 2020-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810327719.4A Active CN108655435B (en) | 2018-04-12 | 2018-04-12 | Micro-action platform of lathe and lathe system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112222439B (en) * | 2020-09-30 | 2022-02-11 | 哈尔滨芯明天科技有限公司 | Large-bearing ultra-precise rapid machining positioning table |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH612869A5 (en) * | 1977-08-15 | 1979-08-31 | Emile Albert Minder | |
| JPS63288601A (en) * | 1987-05-20 | 1988-11-25 | Taga Electric Co Ltd | Ultrasonic vibration cutting device |
| CN202317816U (en) * | 2011-11-08 | 2012-07-11 | 浙江师范大学 | Tool-rest driving platform of ultra-precision processing lathe based on bi-parallel flexible hinge |
| JP5908342B2 (en) * | 2012-05-17 | 2016-04-26 | オークマ株式会社 | Machining vibration suppression method and machining vibration suppression device for machine tool |
| CN106002312B (en) * | 2016-06-29 | 2018-01-23 | 广东工业大学 | A kind of single driving Coupled Rigid-flexible precision movement platform and its implementation and application |
| CN206588347U (en) * | 2017-03-30 | 2017-10-27 | 重庆三峡学院 | A kind of Lathe turning tool adjusting means |
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