CN1182003A - Machine tool structure with dioctahedral frame virtual shaft - Google Patents
Machine tool structure with dioctahedral frame virtual shaft Download PDFInfo
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- CN1182003A CN1182003A CN 97111923 CN97111923A CN1182003A CN 1182003 A CN1182003 A CN 1182003A CN 97111923 CN97111923 CN 97111923 CN 97111923 A CN97111923 A CN 97111923A CN 1182003 A CN1182003 A CN 1182003A
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Abstract
The present invention belongs to the technological field of machine manufacture. The present invention includes six controllable extension shafts, dynamic platform fitting cutting tools, static worktable mounting workpiece and frame, which has large and small octahedral structures with the large octahedron including top triangular frame, bottom triangular frame and side frame and the small octahedron including small triangular frame supporting the worktable and the side frame connecting the small triangular frame and bottom triangular frame. Of the extension shafts, the fixed ends are connected to large octahedral structure and the extension ends to dynamic platform.
Description
The invention belongs to machinery manufacturing technology field, particularly a kind of structural design with virtual-shaft machine tool of comprehensive function.
In mechanical manufacturing field, traditional machine construction is stock-removing machine for example, all has fixing guide rail, and their basic exercise mode is to make cutter or workpiece along fixing guide rail movement.The total this motor pattern of legacy equipment has brought many intrinsic defectives:
One, traditional machine tool must have supporting member and the high-precision guide track systems that are fixed in supporting member such as the clumsy heavy lathe bed, column of high rigidity, cause that lathe weight is big, price is high, difficulty is moved in carrying.
Two, cutting tool can only be realized the processing feed motion along the given direction of fixed guide, limited the flexibility of cutter operation, in-line frame for movement design makes spatial movement need lean on the mutual superposition of each direction motion to realize, easily produces the accumulation of error, has reduced the terminal precision.
At present, machine industry both domestic and external in the face of complicated day by day machining shape and special processing request, has been taked various corresponding countermeasures.For satisfying the requirement of modern processing object, traditional machine tool need just can be finished the work by more complicated heavy self structure and the frock clamp that involves great expense.Consequently the manufacturing cycle is long, cost is high and workmanship is difficult to guarantee.Occur a kind of virtual-shaft machine tool in recent years, adopted 6 telescopic shafts that parallel connection can be implemented to control, replaced traditional fixed guide system; Adopt frame structure, replaced heavy members such as traditional lathe bed, column.
The control system of tradition Digit Control Machine Tool is at rectangular coordinate system, i.e. X, Y, three one-movement-freedom-degrees of Z and A, B, three rotational freedoms of C, corresponding one of them free degree of the motion of each guide track system.And the controller of virtual-shaft machine tool is at the control of six controlled axles.For a certain spatial pose requirement of cutter, exist the length value of corresponding six telescopic shafts corresponding with it.Be that virtual-shaft machine tool is to realize processing request by the control to the physical length of six controlled axles.With the cutter pose that rectangular coordinate system is described, concerning this lathe, become description, and the length of six telescopic shafts is only its working control axle, so be called virtual-shaft machine tool to imaginary axis system.This lathe provides a kind of brand-new process equipment, has fundamentally changed the relative motion pattern of cutter and workpiece, has increased the flexibility of cutter Working motion, makes equipment have bigger technological flexibility and control mobility.
The exemplary of external prior art is six lathes of American I NGERSOLL company, (United States Patent (USP) 5,392,663), it has independent octahedra frame support structure, 6 controlled telescopic shaft upper ends link with the top node of octahedra framework respectively, and the moving platform that the main shaft of lower end and mounting cutter is used links.
The telescopic shaft complex structure of describing in this patent, an end are ball pivot, and the other end is a drive motors, and what be connected with frame roof is the big spheroid that is fixed on outside, controlled telescopic shaft middle part.Install and make the difficulty complexity, shortened the effective length of controlled telescopic shaft comparatively speaking, reached at the territory of having limited the range of work.
In this United States Patent (USP), only propose the octahedra framework of list of lathe in addition, be used for installing telescopic shaft, moving platform and workbench.And workbench relies on the beam of variable cross-section to support, and its defective is to fail to make process system to be made up of two power bars fully, has limited the raising of lathe rigidity.
Because the range of work of this type lathe changes with vertical direction (forward), just one fixing on the occasion of on the range of work of a maximum is arranged, and along with this on the occasion of increase and reduce, its range of work all will be dwindled thereupon.
The objective of the invention is for overcoming the weak point of prior art, adopt closed chain mechanism mode in parallel to design a kind of machine tool structure, make it have better rigidity, higher precision and feed speed faster with multiple virtualization of function axles such as cutting, transfer, assemblings.And improve the flexibility and the mobility of machine tooling process.
A kind of machine tool structure with dioctahedral frame virtual shaft of the present invention's design, comprise 6 controlled telescopic shafts, the moving platform and the quiet workbench that workpiece is housed of cutting tool are housed, support and connect the framework of said telescopic shaft and moving platform, it is characterized in that, said framework is for to form the big or small dioctahedron structure that is coupled to each other by two power bars, wherein big octahedron comprises the top triangle frame of being made up of 12 bars, the bottom triangle frame at 60 ° of angles of and drift angle parallel dislocation with this top triangle, and with two frames that the summit is connected together that each summit of triangle is adjacent with another triangle; Little octahedron comprises the little triangle frame of the support table of being made up of 3 bars, reaches adjacent with said bottom triangle respectively two frames that drift angle is connected of each drift angle with little triangle frame and the bottom triangle frame be made up of 6 bars; The stiff end of said controlled telescopic shaft links to each other with said big octahedra framework, and its flexible end links to each other with said moving platform;
The said little triangle frame of the present invention can be positioned among said top triangle frame and the bottom triangle frame, forms embedded dioctahedron frame structure.Said little triangle frame also can be positioned under the bottom triangle frame, forms external hanging type dioctahedron frame structure.Said controlled telescopic shaft is by the cylinder blanket of an end opening, servomotor in the enclosure is installed successively, the linear guide of hollow inserts the coupling that is subjected to motor-driven ball-screw and ball nut in the guide rod and linear guide and ball nut are fixed together; Linear guide one end stretches out outside the shell that to form flexible its end face of end be that a ball pivot links to each other with said moving platform, and the blind end of shell is a stiff end, and its end face is fixed one empty and cut with scissors and link to each other with said frame roof.Said workbench, also can comprise the lowering or hoisting gear that links with it, this lowering or hoisting gear is inserted a plurality of line slideways and a ball-screw and the ball nut that matches with it in the guide pin bushing and is driven the servomotor that ball nut rotates by support and many rack-mount straight line guide pin bushings.
Three aspects such as the structure of the present controlled telescopic shaft of endomorph of the present invention, dioctahedron machine framework and additional work platform jacking system.
Below in conjunction with accompanying drawing, introduce content of the present invention in detail.
Fig. 1 is a telescopic shaft structural representation of the present invention, among the figure, and the 28th, servomotor can rotate by the ball-screw 16 of drive installation on bearing 26 as requested.Bearing 26 and servomotor 28 all are installed in the casing 24.Straight line guide pin bushing 14 is fixed on the outer wall 22, and outer wall 22 is fixed on again on the casing 24, so does not have relative motion between straight line guide pin bushing 14 and casing 24 outer walls 22.Linear guide 12 can only be done rectilinear motion vertically and can not rotate around axis under the constraint of straight line guide pin bushing 14.Hookup 18 is secured together linear guide 12 and ball nut 20, so ball nut 20 can not rotate around axis.When ball-screw 16 rotations, linear guide 12 just elongates or shortens motion vertically under the drive of ball nut 20.
The ball pivot 10 of the flexible end of controlled telescopic shaft system's dependence shown in Figure 1 and the Hooke's hinge 30 of stiff end are connected with frame roof with the moving platform of this lathe respectively.The hollow structure that linear guide 12 adopts can enter ball-screw 16 easily, has simplified frame for movement greatly.Reduced the possibility that kinematic error produces.
Fig. 2 is a machine framework top view of the present invention, and its top triangle is made up of three bars 32; Bottom triangle is made up of three bars 34.The 60 ° of angles of staggering between top triangle 32 and the bottom triangle 34, two triangular nodes are tied by 6 bars 36, have formed a big regular octahedron.When applying active force on any one node, each root bar of octahedra framework all only is subjected to tension and compression, be not subjected to moment of flexure, so it has very high rigidity.
Fig. 3 is a machine framework schematic side view of the present invention, has represented embedded dioctahedron frame structure situation.Triangle 40 is made up of three screw mandrels 40.The 60 ° of angles of staggering between this triangle 40 and the bottom triangle 34, two triangular nodes are tied by 6 bars 38, form a up-small and down-big octahedron.Quiet workbench 42 relies on three supportings 44 that are positioned at 40 3 node places of triangle to support.Be subjected to external force such as cutting force when quiet workbench 42 and do the time spent, three node places of triangle 40 are stressed and power passed to framework, and each root bar of octahedra framework all only is subjected to tension and compression, is not subjected to moment of flexure, therefore has very high rigidity.
Among Fig. 3, each node of triangle 32 links on one end of 6 controlled telescopic shafts 43 and the octahedra framework, the other end and moving platform 45 link, a kind of length combination of corresponding like this 6 controlled telescopic shafts 43, the specific pose that just has a moving platform 45, the length of 6 controlled telescopic shafts 43 constantly changes, and will bring moving and rotating of moving platform 45.Be installed in cutter 47 on the moving platform 45 and can process workpiece on the quiet workbench 42 neatly.
Fig. 4 is the machine framework schematic side view of the another kind of form of the present invention, has represented external hanging type dioctahedron frame structure situation.Triangle 46 is made up of three bars 46, the 60 ° of angles of staggering between this triangle 46 and the big triangle 34, and two triangular nodes are tied by 6 bars 50, form a up big and down small octahedron.Quiet workbench 42 relies on three supportings 48 that are positioned at 46 3 node places of triangle to support.Be subjected to external force such as cutting force when quiet workbench 42 and do the time spent, three node places of triangle 46 are stressed and power passed to framework, and each root bar of octahedra framework all only is subjected to tension and compression, is not subjected to moment of flexure, therefore has very high rigidity.
Fig. 5 is a worktable lifting apparatus structure schematic diagram.Fixed two or three line slideways 60 below workbench 42, straight line guide pin bushing 62 is connected with support 64.In order when workbench 42 moves up and down, to keep along the accurate translation of Z direction, below workbench 42, also fixed leading screw 52, nut 54 is connected with support 64, and when servomotor 58 passed through gear pair 56 drive nuts 54, workbench 42 was just along with doing translational motion up and down.Because the scope that 6 controlled telescopic shafts drive the moving platforms motion can be reduced to a spheroid, after having added lowering or hoisting gear, the range of movement of moving platform has just been expanded as the identical cylinder of this sphere diameter, has obviously improved machine tool capability.
The present invention has following effect:
The first, the independently controlled telescopic shaft structure of function, linear guide has adopted hollow structure, and being convenient to ball-screw can enter, not only simple in structure, and the center symmetry, has reduced the various errors that produce when moving, and can improve the synthesis precision of lathe greatly.
The second, dioctahedron frame structure, make four big parts of process system: the motive power between lathe, cutter, workpiece, the anchor clamps all is delivered on each bar of octahedra framework by the node of framework, therefore whole framework only bears pulling force or pressure, do not have torsional interaction, reduced the lathe stress deformation and the mismachining tolerance that causes.Can improve the rigidity of lathe greatly.
Three, big octahedra framework connects six controlled flexible thes tip of the axis; The front end of six controlled telescopic shafts connects the moving platform that cutter is housed.The seam bind mode is adopted at two ends, and easy accessibility helps safeguarding.
Four, stationary table is on embedded or the octahedra framework end face of external hanging type, external comprehensive function masterpiece on the workbench is used on each node of end face of this framework, avoid framework to bear bending moment, compare, improved the rigidity of lathe with at present existing parallel machine configuration lathe.
Five, the below of workbench is fully utilized the maximum cross-section of the space of this class lathe with lowering or hoisting gear moving up and down, has enlarged the actual range of work of this lathe.
Description of drawings:
Fig. 1 is the structural representation of controlled telescopic shaft.
Fig. 2 is the schematic top view of dioctahedron machine framework structure, has omitted the machine operation part among the figure.
Fig. 3 is the schematic side view (embedded dioctahedron structure) of dioctahedron machine framework structure, has omitted the worktable lifting components of system as directed among the figure.
Fig. 4 is the schematic side view (external hanging type dioctahedron structure) of dioctahedron machine framework structure, has omitted worktable lifting part and operation of machine tool part among the figure.
Fig. 5 is a worktable lifting system architecture schematic diagram.
Fig. 6 is the embodiment schematic diagram of controlled telescopic shaft.
Fig. 7 is the embodiment schematic diagram of dioctahedron framework, has omitted the worktable lifting part among the figure.
Fig. 8 is a worktable lifting system embodiment schematic diagram.
A kind of machine tool structure with dioctahedral frame virtual shaft embodiment of the present invention's design as shown in Figure 6, is described below respectively in conjunction with each figure:
Fig. 6 is the controlled telescopic shaft structural representation of the embodiment of the invention.Ball pivot 10 is eliminated the gap by adjustable ball pivot seat 8, and straight line guide pin bushing 12 is subjected to the constraint of sliding sleeve 14, can not rotate, and can only move vertically.Servomotor 28 drives leading screw 16, makes nut 20 drive straight line guide pin bushing 12 and elongates or shortens vertically.Controlled telescopic shaft one end utilizes the face that ends of ball pivot seat 8 to be connected with moving platform 45, and the other end utilizes the seam face of Hooke's hinge holder 31 to be connected with octahedra framework upper.It makes simple, and is easy for installation.Utilize the effective length of controlled telescopic shaft fully, enlarged the machine tooling scope.
Fig. 7 is the general structure schematic diagram of the embodiment of the invention.Casing 66 is the hinge attaching parts at octahedra frame structure top.Formed the gore of octahedra end face and the gore of side by it, controlled telescopic shaft also is installed in above the casing 66 simultaneously.Base 68 is the hinge attaching parts of octahedra frame structure bottom, and each base 68 has connected 6 two power bars, has formed the gore of octahedra bottom surface and the gore of side by it, has also formed the gore of embedded octahedral side.
When the workpiece on the 47 cutwork platforms 42 of the cutter on the moving platform, cutting force passes to each two power bar by each node of two octahedra frameworks, makes the rod member of this machine framework only bear pulling force or pressure.In the process system of whole sealing, has fabulous rigidity.
Controlled telescopic shaft 43 is installed between casing 66 and the moving platform 45.The different length of controlled telescopic shaft 43 changes, and can change fix a cutting tool 47 position and posture of moving platform 45 and realize cutting movement.Controlled telescopic shaft 43 is easy for installation, has made full use of the effective length of controlled telescopic shaft 43, has obtained bigger working space scope.
Fig. 8 is the worktable lifting apparatus structure schematic diagram of the embodiment of the invention.3 line slideways 60 have been fixed in workbench 42 bottoms.Three guide pin bushings 62 are connected with support 64, and support 64 is fixed on three nodes of embedded or the octahedral little triangle projective planum of external hanging type.Servomotor 58 drives workbench 42 by gear pair 56 and moves up and down, and workbench always is positioned near the maximum gauge section that processing can reach space inner edge spheroid.The range of work is expanded as a cylinder identical with this sphere diameter from spheroid.
Claims (5)
1, a kind of machine tool structure with dioctahedral frame virtual shaft, comprise 6 controlled telescopic shafts, the moving platform and the quiet workbench that workpiece is housed of cutting tool are housed, support and connect the framework of said telescopic shaft and moving platform, it is characterized in that, said framework is for to form the big or small dioctahedron structure that is coupled to each other by two power bars, wherein big octahedron comprises the top triangle frame of being made up of 12 bars, the bottom triangle frame at 60 ° of angles of and drift angle parallel dislocation with this top triangle, and with two frames that the summit is connected together that each summit of triangle is adjacent with another triangle; Little octahedron comprises the little triangle frame of the support table of being made up of 3 bars, reaches adjacent with said bottom triangle respectively two frames that drift angle is connected of each drift angle with little triangle frame and the bottom triangle frame be made up of 6 bars; The stiff end of said controlled telescopic shaft links to each other with said big octahedra framework, and its flexible end links to each other with said moving platform;
2, machine tool structure as claimed in claim 1 is characterized in that said little triangle frame is positioned among said top triangle frame and the bottom triangle frame, forms embedded dioctahedron frame structure.
3, machine tool structure as claimed in claim 1 is characterized in that under the said bottom triangle frame, forms external hanging type dioctahedron frame structure.
4, machine tool structure as claimed in claim 1, it is characterized in that the cylinder blanket of said controlled telescopic shaft by an end opening, servomotor in the enclosure is installed successively, the linear guide of hollow inserts the coupling that is subjected to motor-driven ball-screw and ball nut in the guide rod and linear guide and ball nut are fixed together; Linear guide one end stretches out outside the shell that to form flexible its end face of end be that a ball pivot links to each other with said moving platform, and the blind end of shell is a stiff end, and its end face is fixed one empty and cut with scissors and link to each other with said frame roof.
5, the described machine tool structure of power claim 1, it is characterized in that said workbench, also comprise the lowering or hoisting gear that links with it, this lowering or hoisting gear is inserted a plurality of line slideways and a ball-screw and the ball nut that matches with it in the guide pin bushing and is driven the servomotor that ball nut rotates by support and many rack-mount straight line guide pin bushings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111923A CN1056551C (en) | 1997-07-04 | 1997-07-04 | Machine tool structure with dioctahedral frame virtual shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111923A CN1056551C (en) | 1997-07-04 | 1997-07-04 | Machine tool structure with dioctahedral frame virtual shaft |
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| Publication Number | Publication Date |
|---|---|
| CN1182003A true CN1182003A (en) | 1998-05-20 |
| CN1056551C CN1056551C (en) | 2000-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97111923A Expired - Fee Related CN1056551C (en) | 1997-07-04 | 1997-07-04 | Machine tool structure with dioctahedral frame virtual shaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075420C (en) * | 1999-12-30 | 2001-11-28 | 清华大学 | Intelligent locating working method |
| CN1075419C (en) * | 1999-12-30 | 2001-11-28 | 清华大学 | Intelligent locating working-equipment |
| CN104344987A (en) * | 2014-10-16 | 2015-02-11 | 北京航空航天大学 | Pulling, bending and twisting material loading testing machine |
| CN107316660A (en) * | 2016-04-27 | 2017-11-03 | 佛山市禾才科技服务有限公司 | A kind of flexible ball |
| CN110549201A (en) * | 2018-05-31 | 2019-12-10 | 长濑因特格莱斯株式会社 | Machine tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5259710A (en) * | 1991-08-26 | 1993-11-09 | Ingersoll Milling Machine Company | Octahedral machine tool frame |
-
1997
- 1997-07-04 CN CN97111923A patent/CN1056551C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075420C (en) * | 1999-12-30 | 2001-11-28 | 清华大学 | Intelligent locating working method |
| CN1075419C (en) * | 1999-12-30 | 2001-11-28 | 清华大学 | Intelligent locating working-equipment |
| CN104344987A (en) * | 2014-10-16 | 2015-02-11 | 北京航空航天大学 | Pulling, bending and twisting material loading testing machine |
| CN104344987B (en) * | 2014-10-16 | 2017-02-08 | 北京航空航天大学 | Pulling, bending and twisting material loading testing machine |
| CN107316660A (en) * | 2016-04-27 | 2017-11-03 | 佛山市禾才科技服务有限公司 | A kind of flexible ball |
| CN107316660B (en) * | 2016-04-27 | 2020-04-07 | 佛山市禾才科技服务有限公司 | Telescopic ball |
| CN110549201A (en) * | 2018-05-31 | 2019-12-10 | 长濑因特格莱斯株式会社 | Machine tool |
| CN110549201B (en) * | 2018-05-31 | 2023-01-17 | 长濑因特格莱斯株式会社 | Machine tool |
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| Publication number | Publication date |
|---|---|
| CN1056551C (en) | 2000-09-20 |
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