CN202070958U - Rigidity compensating mechanism of grinding technology system based on negative rigidity principle - Google Patents
Rigidity compensating mechanism of grinding technology system based on negative rigidity principle Download PDFInfo
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- CN202070958U CN202070958U CN201020641069XU CN201020641069U CN202070958U CN 202070958 U CN202070958 U CN 202070958U CN 201020641069X U CN201020641069X U CN 201020641069XU CN 201020641069 U CN201020641069 U CN 201020641069U CN 202070958 U CN202070958 U CN 202070958U
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Abstract
The utility model provides a rigidity compensating mechanism of a grinding technology system based on a negative rigidity principle, belonging to the technical field of machinery. The structure is a precise grinding workbench which is combined in three freedom degrees and controllable in negative rigidity and is designed by adopting a piezoelectric driver and a flexible parallel mechanism. The rigidity compensating mechanism can generate a negative rigidity effect by adjusting the ratio of the output displacement quantity to the output force of the workbench in the three freedom degree directions, i.e. the rigidity, so that the workbench and the grinding machine are equal in rigidity and reverse in directions, and the elastic deformation of the milling technology system caused by insufficient rigidity is compensated. The rigidity compensating mechanism can be used for compensating the deformation caused by the grinding force of a grinding machining system, can be used for guaranteeing the grinding machining use level to realize the plastic region milling, the grinding precision and the quality, has an important application value, and has the characteristics of being simple in structure and easy to control.
Description
Technical field
The utility model belongs to field of mechanical technique, relate to a kind of grinding process system stiffness compensation mechanism based on the negative stiffness principle, mainly solve elastic deformation amount that grinding process system rigidity deficiency causes and can't the small grinding dosage of accurate control to realize the problem of plastic region grinding.
Background technology
Along with continuous progress in science and technology, the fast development of productivity, the every field of modern industry improves constantly the performance requirement of product material, as: high temperature resistant, anticorrosive, wear-resistant, high rigidity etc.Therefore this new material of engineering ceramics occurred, its performance obviously is different from common ceramic material.Engineering ceramics is a kind of novel hard brittle material, and it has high rigidity, high temperature resistant, excellent characteristics such as wear-resistant, corrosion-resistant and in light weight, and is therefore increasingly extensive in the application in Aero-Space, electronic apparatus, automobile and the field of manufacturing.At present, engineering ceramics has become the important component part of modern industrial technology, is subjected to and payes attention to widely.But because the hard fragility of engineering ceramic material, grinding force is than the influence of factors such as big and lathe rigidity, and there are a lot of difficulties in the grinding of engineering ceramic material.
And in Grinding Process, can produce interaction force between emery wheel and the workpiece, and adding the grinding system insufficient rigidity, grinding has a significant impact to engineering ceramics to cause the strain of grinding system.In order to reduce the workpiece machining error that causes by strain, improve grinding quality, just need realize online rigidity compensation to grinding system.
In order to reach the elastic deformation amount that compensation grinding process system rigidity deficiency causes, need the rigidity of accurate measurement grinding process system on three strain directions on the one hand, want the suffered external force of on-line measurement negative stiffness mechanism on the one hand, and the rigidity size and the grinding process system stiffness that make it on three directions by control piezo-electric crystal output displacement equate that direction is opposite.
And above-mentioned grinding process system stiffness compensation mechanism based on the negative stiffness principle, can initiatively adjust workbench rigidity with the distortion of compensation grinding process system resilience, improve grinding system rigidity, guarantee the ductile grinding processing and the dimensional accuracy of engineering ceramics, improve grinding quality.
The utility model content
The purpose of this utility model is to overcome the insufficient rigidity problem of above-mentioned grinding system, and a kind of grinding process system stiffness compensation mechanism based on the negative stiffness principle is provided.
A kind of grinding process system stiffness compensation mechanism: comprise base 1, following flexible ring 2, last flexible ring 3, main body 4, moving platform 5, flex link 6 and various fastening bolt based on the negative stiffness principle.It is characterized in that: following flexible ring 2 is placed on the base 1 by three strong points, and base 1, following flexible ring 2 are connected by interior hexagonal fastening bolt with main body 4.Three piezoelectric ceramic actuators are fixed on down on the flexible ring 2 by interior hexagonal fastening bolt respectively, and the upper end links to each other with flex link 6 by screw thread pair.Last flexible ring 3 is placed on main body 4 upper ends by three strong points, and is fastenedly connected by hexagon socket head cap screw and main body 4.Last flexible ring 3 and moving platform 5 are fastenedly connected by hexagon socket head cap screw and flex link 6.Base 1 is fixed on the Grinder bench.
Described a kind of grinding process system stiffness compensation mechanism based on the negative stiffness principle produces negative stiffness effects by the output shift quantity of adjusting the three degree of freedom direction, thus the strain that compensation grinding process system incessantly causes because of rigidity.The general flexible parallel connection mechanism structure of the flexible ring parallel institution that adopts is compact more, and a flexible member can be carried out the Z direction simultaneously, around X, and the control of Y direction three degrees of freedom of movement.Measure the strain value of flexible ring 2 down by foil gauge, obtain the power output of piezoelectric ceramic actuator, thereby the negative stiffness of the rigidity controllable parts of structure is regulated and control with the not enough elastic deformation amount who produces of compensation grinding process system rigidity.
The beneficial effect that the utlity model has is:
The output shift quantity that the utility model is adjusted the three degree of freedom direction by piezoelectric actuator power output size produces negative stiffness effects, thus the strain that compensation grinding process system incessantly causes because of rigidity.The general flexible parallel connection mechanism structure of the flexible ring parallel institution that adopts is compact more, and a flexible member can be carried out the Z direction simultaneously, around X, and the control of Y direction three degrees of freedom of movement.Measure the strain value of flexible ring 2 down by foil gauge, obtain the power output of piezoelectric ceramic actuator, thereby the negative stiffness of the rigidity controllable parts of structure is carried out online regulation and control with the not enough elastic deformation amount who produces of compensation grinding process system rigidity.This structure can realize the rigidity compensation to grinding system in grinding process, improve the grinding quality of workpiece.
Description of drawings:
The structure chart of Fig. 1 the utility model rigidity collocation structure:
The vertical view of Fig. 2 the utility model rigidity collocation structure
The side view of Fig. 3 the utility model rigidity collocation structure
The partial structurtes figure of Fig. 4 the utility model rigidity collocation structure
Fig. 5 the utility model is used schematic diagram in grinding machine
Among the figure: 1 base, 2 times flexible ring, flexible ring on 3,4 main bodys, 5 moving platforms, 6 flex links, 7 piezoelectric ceramic actuators, 8 foil gauges are pasted the position, and 9 take turns sand, 10 workpiece, 11 compensation mechanisms, 12 Grinder bench, 13 Piezoelectric Driving power supplys, 14 deformeters, 15 computers.
The specific embodiment:
The utility model is a kind of structure that compensates grinding system rigidity.As Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, for the utility model, workbench is of a size of Ф 130 * 145mm, and the parameter of piezoelectric actuator is: maximum thrust 3000N, axial rigidity 200N/ μ m.The moving platform lower surface is connected by bolt with last flexible ring and flex link by three fulcrums.Last flexible ring can be carried out the motion control of three direction frees degree simultaneously, and it is fixed on three extended positions in main body outer ring.Flex link can prevent that excessive moment of flexure from acting on the piezoelectric ceramic actuator.Piezoelectric ceramic actuator is fixed on down on the flexible ring, connects by bolt, and upper end and connector are by being threaded.Be adhesive with foil gauge to measure the piezoelectric actuator power output in the fixing both sides, position of piezoelectric ceramic actuator on the following flexible ring.
As shown in Figure 5, compensation mechanism 11 is fixed on the Grinder bench 12, and fixation workpiece 10 on it.Piezoelectric ceramic actuator is connected with computer 15 with deformeter 14 by Piezoelectric Driving power supply 13 respectively with foil gauge.The output voltage of computer 15 control drive power supply for piezoelectric ceramics 13, the elongation of driving piezoelectric ceramic actuator, can make flexible ring in the Z direction by the magnitude of voltage of regulating three driver outputs, around X, produce on the Y direction three degree of freedom variation as: at the voltage of three drivers simultaneously in the process from 0V to 100V, piezoelectric ceramic actuator Z direction elongation by 17.9 μ m to 46.8 μ m, and tangible linear relationship arranged, piezoelectric ceramic actuator feeds back to computer 15 to elongation simultaneously, and the strain value of the following flexible ring that measures by foil gauge, enter computer 15 through deformeter, thereby obtain the power output of piezoelectric ceramic actuator according to the relation of strain and power, finally obtain output shift quantity and power output and concern and produce negative stiffness effects, the strain that compensation grinding process system incessantly causes because of rigidity.Realization is regulated and control with the not enough elastic deformation amount who produces of compensation grinding process system rigidity the negative stiffness of the rigidity controllable parts of structure.
When carrying out the rigidity compensation at different grinding process systems, at first the rigidity of grinding process system on the three degree of freedom direction is measured, with the measured value is the control desired value, by control controllable stiffness grinding workbench make it to produce with grinding machine three degree of freedom direction on the rigidity equal and opposite in direction negative stiffness opposite with direction, act on the strain that insufficient rigidity causes on this three degree of freedom direction with grinding machine in the compensation Grinding Process because of being subjected to grinding force.
Claims (1)
1. grinding process system stiffness compensation mechanism based on the negative stiffness principle, comprise base (1), following flexible ring (2), last flexible ring (3), main body (4), moving platform (5), flex link (6) and fastening bolt, it is characterized in that: following flexible ring (2) is placed on the base (1) by three strong points, and base (1), following flexible ring (2) are connected by interior hexagonal fastening bolt with main body (4); Three piezoelectric ceramic actuators are fixed on down on the flexible ring (2) by interior hexagonal fastening bolt respectively, and the upper end links to each other with flex link (6) by screw thread pair; Last flexible ring (3) is placed on main body (4) upper end by three strong points, and is fastenedly connected by hexagon socket head cap screw and main body (4); Last flexible ring (3) and moving platform (5) are fastenedly connected by hexagon socket head cap screw and connector; Descending the last fixedly both sides of piezoelectric ceramic actuator position of flexible ring (2) to paste foil gauge, base (1) is fixed on the Grinder bench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020641069XU CN202070958U (en) | 2010-11-26 | 2010-11-26 | Rigidity compensating mechanism of grinding technology system based on negative rigidity principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020641069XU CN202070958U (en) | 2010-11-26 | 2010-11-26 | Rigidity compensating mechanism of grinding technology system based on negative rigidity principle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202070958U true CN202070958U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020641069XU Expired - Lifetime CN202070958U (en) | 2010-11-26 | 2010-11-26 | Rigidity compensating mechanism of grinding technology system based on negative rigidity principle |
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| CN (1) | CN202070958U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107375A (en) * | 2010-11-26 | 2011-06-29 | 北京工业大学 | Negative stiffness principle-based grinding process system stiffness compensation mechanism |
| CN113500518A (en) * | 2021-06-15 | 2021-10-15 | 广州大学 | Self-adaptive grinding platform and grinding equipment |
-
2010
- 2010-11-26 CN CN201020641069XU patent/CN202070958U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102107375A (en) * | 2010-11-26 | 2011-06-29 | 北京工业大学 | Negative stiffness principle-based grinding process system stiffness compensation mechanism |
| CN113500518A (en) * | 2021-06-15 | 2021-10-15 | 广州大学 | Self-adaptive grinding platform and grinding equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |