CN1085129C - Spindle swing mechanism for multi-coordinate numerically-controlled machine tool - Google Patents
Spindle swing mechanism for multi-coordinate numerically-controlled machine tool Download PDFInfo
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- CN1085129C CN1085129C CN00105552A CN00105552A CN1085129C CN 1085129 C CN1085129 C CN 1085129C CN 00105552 A CN00105552 A CN 00105552A CN 00105552 A CN00105552 A CN 00105552A CN 1085129 C CN1085129 C CN 1085129C
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Abstract
The present invention belongs to the technical fields of machine manufacturing automatization and numerical control machine tools. The present invention comprises a supporting outer casing containing upper space and lower space, wherein the upper space forms an outer casing of a pneumatic follow-up balance device, and a main shaft machining mechanism is installed in the lower space. Two rotary linear motors symmetrically installed are fixed on the outer wall of the main shaft machining mechanism, and an installing lug used for connecting a main body of a machining machine tool is arranged on the upper part of the outer casing. The present invention has the characteristics of simple structure, quick responding capacity, high rigidity, high precision and large machining ranges, and also fundamentally solves the problems of transmission errors of a main shaft swinging mechanism and poor system responding capacity.
Description
The invention belongs to automation of machinery manufacture and Digit Control Machine Tool field, particularly the machining spindle drive part structural design of multi-coordinate numerically-controlled machine tool.
The multi-coordinate machining tool is being played the part of important role in the production and processing field.Wherein, the machining spindle drive part is owing to be directly connected to final process quality issue, and the reasonable innovative design of this mechanism is then proposed high requirement.
For now, spindle swing mechanism is distinguished to some extent because of the difference of multi-coordinate numerically-controlled machine tool structure.Present multi-coordinate numerical control machine tool structure mainly contains three types: a class is traditional C type cascaded structure, and a class is the many rod parallel connection structures of Stewart type of up-to-date appearance, and another kind of is the connection in series-parallel mixed structure.
For cascaded structure, the swing mechanism of its main axle unit adopts driven by servomotor more, gear (or worm and gear, band transmission) transmission, and the scheme of position sensing feedback, two rotations (A axle, B axle) motion is connected.This just brings some weakness that can't overcome: because the total mass ratio of swing mechanism is bigger, the strain and the frictional resistance in the guide rail of adding transmission link are bigger, make lathe be difficult to obtain high feed speed and acceleration, can not satisfy the requirement of Modern High-Speed highly-efficient processing; Because the series connection open-chain structure is formed many, the complex structure of link, and has the connection gap between cantilever section and link, is difficult to guarantee high global stiffness, is not easy to obtain high machining accuracy and crudy.
For parallel-connection structure, its multi-coordinate working motion all is the result who acts on simultaneously by many driving shafts (two power bars), eliminated the weakness such as error propagation, rigidity, response speed of cascaded structure, have simple in structure, precision is higher, rigidity is better, the quick advantage of response, becomes new developing direction.But, can find by analyzing: because general direct some inherent shortcomings that exist based on the parallel-connection structure of Stewart platform principle itself are (as movement interference, there is dead band etc.), make the suitable exercise scope of its rotational coordinates more much smaller (as A than conventional multi-coordinate numerically-controlled machine tool, the rotating range of B axle has only 20～30 degree usually, and conventional multi-coordinate lathe can reach more than 90 degree), and along with the effective working space of these class five coordinate lathes of increasing of the anglec of rotation will reduce significantly, can't realize the processing of multi-coordinate on a large scale truly, limit the application of such lathe greatly.
For the connection in series-parallel mixed structure, it rotatablely moves and realizes that by the combination drive mode (rotation is directly to realize by parallel institution, another conventional ADS driving mechanism that rotates by series connection realizes), because its parallel institution is based on space four bars driving platform principle, eliminated space interference problem fully, can realize processing (A, B diaxon all can be realized 90 degree motions) on a large scale based on the parallel-connection structure of Stewart platform principle.But the drive gap and the error problem of its series connection swing link are not able to fine solution, cause dynamic response capability still to have certain problem.
The objective of the invention is for overcoming the weak point of prior art, a kind of spindle swing mechanism for multi-coordinate numerically-controlled machine tool is proposed, both had simple in structure, capability of fast response, high rigidity, high-precision characteristics are arranged, have the bigger range of work again, fundamentally solved the driving error and the system responses capability problems of spindle swing mechanism.
A kind of spindle swing mechanism for multi-coordinate numerically-controlled machine tool that the present invention proposes, it is characterized in that, comprise and contain the support shell in two spaces up and down, its upper space constitutes pneumatic shell body with dynamic poise device, in the bottom sky is same the main shaft organisation of working is installed, its outer wall is fixed with the rotation linear electric motors that two symmetries are installed, and the top of this shell is provided with the mounting ear that is used to connect the machining tool main body.
Saidly pneumaticly can place the piston of air chamber and the connecting rod that is attached thereto by air chamber with dynamic poise device, the end cap that places the air chamber upper end to be used for sealed air chamber is formed.
Said rotation linear electric motors can surround the motor cavity by base and shell, respectively are fixed with the stator that is wound with coil at shell and base inside, and the rotor that is wound with coil is arranged between two stators, and the axle center hole of rotor is fixing with driving rotating shaft.
Characteristics of the present invention and effect:
(1) by additional simple Pneumatic weight counterbalancing mechanism, improved the capability of fast response of system of processing greatly,
Reduced to be additional to the active force on the lathe bed precise motion parts, make lathe stressed, the distortion,
Effect or the like relevant issues are able to very big improvement, are very beneficial for improving machining accuracy and add working medium
Amount realizes high-speed and high-efficiency processing.
(2) directly drive electric main shaft processing body by the rotation linear electric motors, realize that zero transmission drives, fully
Eliminate the driving error of transmission mechanism, improved capability of fast response greatly, improved the location
(angle) precision and dynamic property, and control is simple, reliable.
(3) the present invention both had simple in structure, control easily, the precision advantages of higher, have bigger again
The range of work, its rotational coordinates range of movement can reach ± and 90 °, processing space is much higher than base
In the spindle swing system of Stewart platform, abilities such as rigidity, dynamic response are compared traditional
Had again based on the spindle swing system of C type structure and existing mixed structure spindle swing system
The raising in one step.
The present invention fundamentally improves the whole processing performance of multi-coordinate numerical control machine tool, carries out bottom and prepares for low-cost, popular multi-coordinate system of processing plays a greater role in the every field of national economy.
Brief Description Of Drawings:
Fig. 1 is a present embodiment spindle swing mechanism general structure schematic diagram.
Fig. 2 is the rotation linear electric motors cross-sectional view in the present embodiment.
Fig. 3 is that rotation linear electric motors A-A section is faced structural representation among Fig. 2.
Fig. 4 is the perspective view of present embodiment spindle swing mechanism.
A kind of multi-coordinate numerically-controlled machine tool spindle swing structure embodiment of the present invention's design is described with reference to the accompanying drawings as follows:
Present embodiment general structure such as Fig. 1, shown in Figure 4.This mechanism utilizes mounting ear 5 to link to each other with machine body, utilize rotation linear electric motors 1 direct drive shaft organisation of working 2 (to adopt electric main shaft organisation of working, belong to prior art), eliminated driving error, improved the response speed of swing, make simultaneously under the situation of same volume, can obtain to compare the bigger moment of torsion of traditional driven by servomotor, control more simple and reliable; By additional pneumatic with dynamic poise device 4 (comprising shell body 3 tops, air chamber 44, piston 43, end cap 41, connecting rod 42), in air chamber 44, pressurize by the circulation pore on the end cap by the controlled compression pump in the external world, flatten the reaction force that weighing apparatus falls the weight of part main axle structure and adds man-hour with additional gas, alleviate the burden of the machine tool guideway of carrying spindle swing system greatly, improve spindle swing entire system capability of fast response, and improved machine tool system whole synthesis performance greatly.
The rotation linear electric motors basic structure of present embodiment as shown in Figure 2.Its cardinal principle is the same with the linear electric motors drive principle, only linear drives is partly made the circumference rotation status in the present invention the inside, the right and left is that the stator 13,18 of motor (all is wound with the coil 14 of certain number of turn on it, its wiring and distribution are as shown in Figure 3), respectively by screw 12,19 and housing 11 and 17 fixing (utilizing screw 15 to link to each other), the centre is the rotor 16 of motor, is 10 rotations with driving rotating shaft.Like this, when in the stator during electric current by certain rule, the magnetic field of generation will drive stator and move according to certain rules, the swing of realization main axle unit ± 90 °.The stator configuration is made of a series of coils that radially distribute radial groove and be surrounded on wherein as shown in Figure 3.
Its three-dimensional effect diagram as shown in Figure 4.The active force that utilizes pneumatic counterbalance system 4 to eliminate under most of processing and the normal load-bearing state, the dynamic property of raising spindle swing system motion; By the sense of current of control rotation linear electric motors, realize main shaft processing body ± the rotatablely moving of 90 ° no driving error, improved the dynamic response capability of processing body greatly.
Claims (3)
1, a kind of spindle swing mechanism for multi-coordinate numerically-controlled machine tool, it is characterized in that, comprise and contain the support shell in two spaces up and down, its upper space constitutes pneumatic shell body with dynamic poise device, the main shaft organisation of working is installed in the lower space, its outer wall is fixed with the rotation linear electric motors that two symmetries are installed, and the top of this shell is provided with the mounting ear that is used to connect the machining tool main body.
2, spindle swing mechanism for multi-coordinate numerically-controlled machine tool as claimed in claim 1 is characterized in that, said pneumatic with dynamic poise device by air chamber, place the piston of air chamber and the connecting rod that is attached thereto, the end cap that places air chamber upper end to be used for sealed air chamber is formed.
3, spindle swing mechanism for multi-coordinate numerically-controlled machine tool as claimed in claim 1, it is characterized in that, said rotation linear electric motors surround the motor cavity by base and shell, respectively be fixed with the stator that is wound with coil at shell and base inside, the rotor that is wound with coil is arranged between two stators, and the axle center hole of rotor is fixing with driving rotating shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00105552A CN1085129C (en) | 2000-03-31 | 2000-03-31 | Spindle swing mechanism for multi-coordinate numerically-controlled machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00105552A CN1085129C (en) | 2000-03-31 | 2000-03-31 | Spindle swing mechanism for multi-coordinate numerically-controlled machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1265953A CN1265953A (en) | 2000-09-13 |
| CN1085129C true CN1085129C (en) | 2002-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00105552A Expired - Fee Related CN1085129C (en) | 2000-03-31 | 2000-03-31 | Spindle swing mechanism for multi-coordinate numerically-controlled machine tool |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1318186C (en) * | 2003-07-04 | 2007-05-30 | 湖南一派数控设备有限公司 | Straight line servo mechanism with multiple cutter |
| CN102717134A (en) * | 2012-05-30 | 2012-10-10 | 安阳鑫盛机床股份有限公司 | Whirling milling head for processing ball screw |
| CN102785086A (en) * | 2012-08-23 | 2012-11-21 | 西北工业大学 | Locking oscillating head for five-coordinate machine tool |
| CN107052830A (en) * | 2017-04-11 | 2017-08-18 | 巨轮智能装备股份有限公司 | Electromechanical B axle shaking device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581166A (en) * | 1986-02-18 | 1996-12-03 | Robotics Research Corporation | Industrial robot with servo |
| FR2757440A1 (en) * | 1996-12-20 | 1998-06-26 | Conservatoire Nat Arts | Platform with hexapod telescopic legs for use with machine tools |
| CN1212197A (en) * | 1997-09-19 | 1999-03-31 | 中国科学院沈阳自动化研究所 | Parallel mechanism of parallel structure numerical control machine tool |
-
2000
- 2000-03-31 CN CN00105552A patent/CN1085129C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581166A (en) * | 1986-02-18 | 1996-12-03 | Robotics Research Corporation | Industrial robot with servo |
| FR2757440A1 (en) * | 1996-12-20 | 1998-06-26 | Conservatoire Nat Arts | Platform with hexapod telescopic legs for use with machine tools |
| CN1212197A (en) * | 1997-09-19 | 1999-03-31 | 中国科学院沈阳自动化研究所 | Parallel mechanism of parallel structure numerical control machine tool |
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| CN1265953A (en) | 2000-09-13 |
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