CN109465506A - A kind of turning steep-pitch thread Boring Bar - Google Patents
A kind of turning steep-pitch thread Boring Bar Download PDFInfo
- Publication number
- CN109465506A CN109465506A CN201910010738.9A CN201910010738A CN109465506A CN 109465506 A CN109465506 A CN 109465506A CN 201910010738 A CN201910010738 A CN 201910010738A CN 109465506 A CN109465506 A CN 109465506A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- excitation coil
- magnetorheological fluid
- vibration
- pitch thread
- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G5/00—Thread-cutting tools; Die-heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
Abstract
The present invention relates to a kind of turning steep-pitch thread Boring Bars, belong to field of machining, including parts such as cutter spindle, knife bar axle sleeve, excitation coil, upper permanent magnet, lower permanent magnet, piezoelectric ceramic piece, end cap and magnetorheological fluids, wherein excitation coil is wrapped on cutter spindle, its coil lead is connected with piezoelectric ceramic piece, magnetorheological fluid is infused in the toroidal cavity that permanent magnet and lower permanent magnet are formed, and piezoelectric ceramic piece is arranged in the toroidal cavity that upper permanent magnet and knife bar axle sleeve are formed.The generation of flutter when the Boring Bar is able to suppress turning steep-pitch thread, excitation coil is passed to by coil lead since cutting vibration makes piezoelectric ceramic piece generate continually changing electric current, so excitation coil can generate continually changing magnetic field, to rapidly change the rigidity and damping of magnetorheological fluid, to reach the function of reducing vibration, work piece surface quality is improved.
Description
Technical field
The present invention relates to field of machining, in particular to a kind of turning steep-pitch thread Boring Bar.
Background technique
Usually can be along with the generation of cutting-vibration in metal cutting process, and cutting-vibration can seriously affect work
The surface topography and machining precision of part.Especially during turning steep-pitch thread, since height feeding cutting is produced
Raw cutting force is larger, thus cutting-vibration is also larger, seriously affects the surface quality of steep-pitch thread part.For this vibration
The harm of generation, domestic and foreign scholars have done a large amount of research to vibration mechanism of production and vibration suppression.Vibration suppressing method master
It is divided into three categories, active control, passive control and semi- active control.Wherein active control inhibit vibration to detection accuracy and
The requirement of control system is relatively high, and generally requires the components such as additional power source, sensor and actuator, and structure is complicated；Quilt
The apparatus structure of dynamic control is simple, and reliability is preferable, but can not automatically adjust stiffness and damping according to operating condition, and specific aim is poor；
Semi- active control combines the advantages of active control and passive control, especially magnetorheological fluid, piezoelectric ceramic piece and shape note
The application of metal material is recalled, so that cutting vibration inhibition achieves better effect.The present invention utilizes magnetorheological fluid and piezoelectricity
The method that potsherd combines designs a kind of turning steep-pitch thread Boring Bar to reduce generated cutting in turning process
Flutter improves work piece surface quality.
Summary of the invention
The purpose of the present invention is to provide a kind of Boring Bars, tight to improve the cutting-vibration in traditional cutting process
Ghost image rings the problem of surface quality and machining accuracy of workpiece.
In order to solve problem above, the present invention uses following technical scheme, a kind of turning steep-pitch thread Boring Bar, packet
Include cutter spindle, sealing ring, bolt, end cap, winding wire, cylindrical thread plug, seal rubber washer, knife bar axle sleeve, excitation line
Circle, magnetorheological fluid, upper (lower) permanent magnet, through-hole and piezoelectric ceramic piece, wherein the cutter spindle is set in the knife bar
Outside axis, closed toroidal cavity is formed between the two and the end cap.
The excitation coil is located in the toroidal cavity, and is wrapped on the cutter spindle, the work of setting
Be in order to when vibration cutting by the electric current of winding wire conveying by excitation coil, magnetic field needed for generating it.
The lower permanent magnet is located inside the toroidal cavity, one layer of the outside of excitation coil, the upper permanent magnetism
Body is arranged inside toroidal cavity, one layer of the outside of magnetorheological fluid, and the effect of the two setting is for enhancing the excitation line
Enclose the magnetic field strength generated.
The magnetorheological fluid, which passes through, injects annular cavity inside in the through-hole being arranged on the end cap, under described
One layer on the outside of permanent magnet, and through-hole is sealed with the cylindrical thread plug and seal rubber washer, it is described magnetorheological
The effect of liquid setting is that the electric current conveyed by the winding wire loads in the excitation coil, so that the excitation coil
Magnetic field is generated, changes the damping and rigidity of the magnetorheological fluid, achievees the purpose that vibration damping.
The piezoelectric ceramic piece is arranged inside toroidal cavity, is located on the outside of the upper permanent magnet one layer, setting
Effect is in metal cutting process, and the cutting vibration of generation leads to the piezoelectric ceramic piece under the action of mechanical external force
Relative displacement occurs for its internal positive and negative charge center so as to cause polarization, and it is opposite to lead to occur in two end surfaces of electrolyte symbol
Therefore bound charge obtains electric current under vibration, pass to the excitation coil by the winding wire, is metal cutting
Vibration damping provides magnetic field condition.
The winding wire connection piezoelectric ceramic piece and excitation coil, effect is transmitted by the piezoelectricity
Potsherd is due to vibrating the electric current generated to the excitation coil.
In the present invention, the knife bar axle sleeve and cutter spindle by the bolt connect the knife bar axle sleeve with
The end cap also by described bolt connection.
In the present invention, the circle wall of the cutter spindle is equipped with winding wire hole, and the winding wire is set to institute
In the winding wire hole stated, to connect the excitation coil and the piezoelectric ceramic piece.
Heretofore described end cap is gap-matched with the knife bar axle sleeve, the knife bar axle sleeve and the knife
It is also gap-matched at bar axis circle wall, since, there are certain pressure, magnetorheological fluid can be in the axis of assembly in toroidal cavity
It is revealed to gap and radial clearance, it is therefore desirable to consider the Seal Design to single unit system, so need to be arranged sealing ring, institute
The end cap radial direction stated with axial direction at and cutter spindle it is axially grooved, the sealing ring is respectively charged into wherein, and guarantee slot
It to be respectively smaller than the diameter of sealing ring deeply, a part of sealing ring will exceed notch, make two parts by this assembly method
Squeezing effect is generated in assembly to achieve the purpose that sealing.
In conclusion the present invention provides a kind of Boring Bar, structure is simple, convenient for manufacture processing and installation, simultaneously
The Boring Bar is able to suppress the cutting-vibration problem occurred when turning steep-pitch thread.
When cutting-vibration occurs for turning steep-pitch thread, the cutting vibration of generation makes the piezoelectric ceramic piece in machine
Cause its internal positive and negative charge center that relative displacement occurs so as to cause polarization under the action of tool external force, leads to electrolyte both ends table
Occur the opposite bound charge of the symbol therefore electric current of acquisition under vibration in face, is passed to by the winding wire described
Excitation coil, to generate magnetic field, enhance under the action of the permanent magnet up and down caused by magnetic field make it is described
Particle in magnetorheological fluid can be gathered into chain, and the magnetorheological fluid has liquid and becomes class solid, and has certain shearing
Yield strength；When vibration reduces or disappears, electric current caused by the piezoelectric ceramic piece also can reduce or disappear, described
Solid in magnetorheological fluid can be rapidly transformed into again as liquid, this process is that Millisecond is other, therefore can quick basis
The size of generated cutting-vibration changes the rigidity and damping of the magnetorheological fluid, to reach the function for reducing cutting vibration
Energy.
It is an advantage of the invention that the rigidity of the magnetorheological fluid in the Boring Bar and damping can be according to institutes in cutting process
The magnitude of vibrations of generation is controlled and is adjusted, and change procedure is that Millisecond is other faster, improves previous active damping
The relatively high disadvantage of requirement and passive vibration damping to detection accuracy and control system can not automatically adjust rigidity according to operating condition
The disadvantage of specific aim difference is damped, which can play preferably in terms of inhibiting cutting-vibration caused by turning steep-pitch thread
Effect.
Detailed description of the invention
In order to more clearly illustrate technical solution of the present invention, attached drawing needed in the present invention is made below simple
Introduction.
Fig. 1 is a kind of turning steep-pitch thread Boring Bar structure chart.
Fig. 2 is cylindrical thread plug part-structure figure in end cap.
Its specific label is as follows:
1 is cutter spindle, and 2 be winding wire, and 3 be bolt, and 4 be excitation coil, and 5 be lower permanent magnet, and 6 be cylindrical thread plug, and 7 are
Magnetorheological fluid, 8 be upper permanent magnet, and 9 be knife bar axle sleeve, and 10 be end cap, and 11 be seal rubber washer, and 12,13,14 be all sealing
Circle, 15 be piezoelectric ceramic piece, and 16 be through-hole.
Specific embodiment
Usually can be along with the generation of cutting-vibration in cutting process, and cutting-vibration can seriously affect workpiece
Surface topography and machining precision.Especially during turning steep-pitch thread, since it is produced by height feeding cutting
Raw cutting force is larger, thus cutting-vibration is also larger, seriously affects the surface quality of steep-pitch thread part.For this vibration
The harm of generation, domestic and foreign scholars have done a large amount of research to vibration mechanism of production and vibration suppression.Vibration suppressing method master
It is divided into three categories, active control, passive control and semi- active control.Wherein active control inhibit vibration to detection accuracy and
The requirement of control system is relatively high, and generally requires the components such as additional power source, sensor and actuator, and structure is complicated；Quilt
The apparatus structure of dynamic control is simple, and reliability is preferable, but can not automatically adjust stiffness and damping according to operating condition, and specific aim is poor；
Semi- active control combines the advantages of active control and passive control, especially magnetorheological fluid, piezoelectric ceramic piece and shape note
The application of metal material is recalled, so that cutting vibration inhibition achieves better effect.
The present invention is that the method combined using magnetorheological fluid and piezoelectric ceramic piece designs a kind of turning steep-pitch thread
Boring Bar is to reduce generated cutting-vibration in cutting process.
It is clear in order to be more clear purpose of design of the invention, technical solution and advantage, below in conjunction with of the invention
Detailed description of the invention is more clear the present invention, completely describes.
In narration of the invention, it should be noted that indicating positions noun or the position such as term "inner", "outside" in text
Relationship is based on orientation or positional relationship shown in Detailed description of the invention, it is only for convenient for carrying out simplifying description to this patent, and
It is not that the device of indication or suggestion meaning or element must have a particular orientation or be constructed and operated in a specific orientation, therefore
It is not considered as limiting the invention.
In description in the present invention, it is also necessary to explanation is that term setting, installation, connection shall be understood in a broad sense in text,
For the ordinary skill in the art, it can according to circumstances understand the specific meaning of above-mentioned term in the present invention.
A kind of turning steep-pitch thread Boring Bar, including cutter spindle 1, sealing ring (12,13,14), bolt 3, end cap 10,
Winding wire 2, cylindrical thread plug 6, seal rubber washer 11, knife bar axle sleeve 9, excitation coil 4, magnetorheological fluid 7, upper permanent magnet
8, lower permanent magnet 5, through-hole 16 and piezoelectric ceramic piece 15, wherein the knife bar axle sleeve 9 is located at outside the cutter spindle 1, two
Closed toroidal cavity is formed between person and the end cap 10.
The excitation coil 4 is located in the toroidal cavity, and is wrapped on the cutter spindle 1, setting
Effect is electric current in order to be conveyed by winding wire 2 when vibration cutting by excitation coil 4, magnetic field needed for generating it.
The lower permanent magnet 5 is arranged in inside the toroidal cavity, positioned at one layer of the outside of the excitation coil 4,
The upper permanent magnet 8 is arranged inside toroidal cavity, 7 one layer of the outside of magnetorheological fluid, and the effect of the two setting is
In order to enhance the magnetic field that the excitation coil 4 generates.
The magnetorheological fluid 7, which passes through, injects annular cavity inside in the through-hole 16 being arranged on the end cap 10, be located at institute
Lower 5 one layer of outside of permanent magnet is stated, and is carried out the through-hole 16 with the cylindrical thread plug 6 and seal rubber washer 11
Sealing, the effect that the magnetorheological fluid 7 is arranged are that the electric current conveyed by the winding wire 2 is loaded in the excitation line
In circle 4, the damping and rigidity of the magnetorheological fluid 7 can be changed by generating corresponding magnetic field, achieve the purpose that cut vibration damping.
The piezoelectric ceramic piece 15 is arranged inside toroidal cavity, 8 one layer of the outside of upper permanent magnet, setting
Effect is in metal cutting process, and the cutting vibration of generation makes the piezoelectric ceramic piece 15 under the action of mechanical external force
Cause its internal positive and negative charge center that relative displacement occurs so as to cause polarization, leads to symbol phase occur in two end surfaces of electrolyte
Therefore anti-bound charge obtains electric current under vibration, the excitation coil 4 is passed to by the winding wire 2,
To generate required magnetic field, magnetic field condition is provided for metal cutting vibration damping.
The winding wire 2 connects the piezoelectric ceramic piece 15 and excitation coil 4, and effect is transmitted by described
Piezoelectric ceramic piece 15 is due to vibrating the electric current generated to excitation coil 4.
In the present invention, the knife bar axle sleeve 9 is connect with cutter spindle 1 by the bolt 3, the knife bar axle sleeve
9 connect with the end cap 10 also by the bolt 3.
In the present invention, the circle wall of the cutter spindle 1 is equipped with winding wire hole, and the winding wire 2 is set to
In winding wire hole, to connect the excitation coil 4 and the piezoelectric ceramic piece 15.
Heretofore described end cap 10 is gap-matched with the knife bar axle sleeve 9, the knife bar axle sleeve 9 with it is described
Cutter spindle 1 circle wall at be also gap-matched, since there are certain pressure, 7 meetings of magnetorheological fluid in toroidal cavity
It is leaked at the axial gap and radial clearance of assembly, it is therefore desirable to the Seal Design to single unit system is considered, so needing
Sealing ring 12,13,14 is set, the end cap 10 it is radial with it is axial at and cutter spindle 1 it is axially grooved, by the sealing ring
12,13,14 be respectively charged into wherein, and guarantee that groove depth will be respectively smaller than the diameter of sealing ring 12,13,14, sealing ring 12,13,
14 a part will exceed notch, make two parts generate squeezing effect in assembly to reach sealing by this assembly method
Purpose.
In conclusion the present invention provides a kind of Boring Bar, structure is simple, convenient for manufacture processing and installation, simultaneously
The Boring Bar is able to suppress the cutting-vibration problem occurred when turning steep-pitch thread.
When cutting-vibration occurs for turning steep-pitch thread, the cutting vibration of generation makes the piezoelectric ceramic piece 15 exist
Cause its internal positive and negative charge center that relative displacement occurs so as to cause polarization under the action of mechanical external force, leads to electrolyte both ends
Occur the opposite bound charge of the symbol therefore electric current of acquisition under vibration in surface, is passed to by the winding wire 2
The excitation coil 4, magnetic field required for generating enhance generated magnetic under the action of permanent magnet up and down 8,5
Field makes the particle aggregation chaining in the magnetorheological fluid 7, and the magnetorheological fluid 7 has liquid and becomes class solid, and has
There is certain shear yield strength；When vibration reduces or disappears, electric current caused by the piezoelectric ceramic piece 15 can also subtract
Small or disappear, the solid in the magnetorheological fluid 7 can be rapidly transformed into again as liquid, this process is that Millisecond is other, because
This can quickly change the rigidity and damping of the magnetorheological fluid 7 according to generated cutting vibration, be cut with reaching reduction
Cut the function of flutter.The foregoing is merely presently preferred embodiments of the present invention, and however, it is not limited to this, all to the technology of the present invention side
Case is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be covered of the invention
Protection scope.
Claims (5)
1. a kind of turning steep-pitch thread Boring Bar, which is characterized in that including cutter spindle, end cap, knife bar axle sleeve, excitation line
Circle, magnetorheological fluid, upper (lower) permanent magnet and piezoelectric ceramic piece, the excitation coil are set in outside the cutter spindle, position
In in the annular space that the cutter spindle and the knife bar axle sleeve are formed, and made pottery by the winding wire and the piezoelectricity
Tile is connected, the cutter spindle and the knife bar axle sleeve and the end cap three be sequentially connected connect to be formed it is closed
Annular space.
2. a kind of turning steep-pitch thread Boring Bar, which is characterized in that the lower permanent magnet is located at the toroidal cavity
Inside, one layer of the outside of the excitation coil, the upper permanent magnet are arranged inside toroidal cavity, the magnetorheological fluid
One layer of outside, the effect of the two setting is for enhancing the magnetic field of the excitation coil generation.
3. a kind of turning steep-pitch thread Boring Bar, which is characterized in that the through-hole is set on the end cap, is used for
The injection magnetorheological fluid, and by the cylindrical thread plug and the seal rubber washer by the through-hole into
Row sealing.
4. a kind of turning steep-pitch thread Boring Bar, which is characterized in that the end cap and the knife bar axle sleeve use gap
It is also gap-matched at cooperation, the knife bar axle sleeve and the cutter spindle circle wall.
5. a kind of turning steep-pitch thread Boring Bar, which is characterized in that the cutting vibration that metal cutting generates makes described
Piezoelectric ceramic piece generates the electric current under vibration, the excitation coil is passed to by the winding wire, required for generation
Magnetic field, under the action of the permanent magnet up and down enhance magnetic field intensity the magnetorheological fluid internal structure is occurred
Variation can quickly change the rigidity and damping of the magnetorheological fluid according to generated cutting vibration, be reduced with reaching
The function of cutting vibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010738.9A CN109465506A (en) | 2019-01-07 | 2019-01-07 | A kind of turning steep-pitch thread Boring Bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910010738.9A CN109465506A (en) | 2019-01-07 | 2019-01-07 | A kind of turning steep-pitch thread Boring Bar |
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| Publication Number | Publication Date |
|---|---|
| CN109465506A true CN109465506A (en) | 2019-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910010738.9A Pending CN109465506A (en) | 2019-01-07 | 2019-01-07 | A kind of turning steep-pitch thread Boring Bar |
Country Status (1)
| Country | Link |
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| CN (1) | CN109465506A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111750200A (en) * | 2020-07-01 | 2020-10-09 | 中国航发沈阳发动机研究所 | Novel intelligent clamp of aeroengine with damping and locking function of taking off |
| CN112338623A (en) * | 2020-10-30 | 2021-02-09 | 齐鲁工业大学 | Rigidity self-adjusting fast cutter servo device |
| CN112643059A (en) * | 2020-11-27 | 2021-04-13 | 哈尔滨理工大学 | Design method of vibration reduction cutter for turning large-pitch threads |
| CN114846927A (en) * | 2022-05-13 | 2022-08-05 | 江苏大学 | Self-adaptive intelligent no-moisture plough and method and soil preparation machine |
| CN115076289A (en) * | 2022-07-06 | 2022-09-20 | 重庆大学 | Self-adaptive variable-rigidity variable-damping magnetic control vibration attenuation structure for wind tunnel tail support model |
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| CN114846927A (en) * | 2022-05-13 | 2022-08-05 | 江苏大学 | Self-adaptive intelligent no-moisture plough and method and soil preparation machine |
| CN115076289A (en) * | 2022-07-06 | 2022-09-20 | 重庆大学 | Self-adaptive variable-rigidity variable-damping magnetic control vibration attenuation structure for wind tunnel tail support model |
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