CN203542244U - Square ram gap compensation actuator - Google Patents
Square ram gap compensation actuator Download PDFInfo
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- CN203542244U CN203542244U CN201320774510.5U CN201320774510U CN203542244U CN 203542244 U CN203542244 U CN 203542244U CN 201320774510 U CN201320774510 U CN 201320774510U CN 203542244 U CN203542244 U CN 203542244U
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- compensation actuator
- backlash compensation
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- face
- actuator
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Abstract
A square ram gap compensation actuator is a small-gradient wedge block, the front end face of the gap compensation actuator is a plane, the rear end face of the gap compensation actuator is an oblique plane, and M round thin-wall pressurization structures are arranged on the gap compensation actuator. Each round thin-wall pressurization structure comprises an elastic deflection deformation thin wall, a pressurization oil cavity, an end cover and a sealing device, wherein the elastic deflection deformation thin wall is arranged on the front end face of the gap compensation actuator, the end cover is provided with a sealing ring sinking groove, an O-shaped sealing ring is installed in the sealing ring sinking groove, the end cover is fixed in a counter bored hole in the rear end face of the gap compensation actuator through a screw to form the pressurization oil cavity, the thickness of the end cover does not exceed that of the rear end face of the gap compensation actuator, the front end face of the gap compensation actuator is subjected to plastic-coated treatment, an lubricating oil groove is formed in the plastic-coated face, and a pressurization oil way and an lubricating oil way are arranged in the gap compensation actuator. The gap compensation actuator is high in micro-gap compensation accuracy and good in supporting rigidity.
Description
Technical field
The utility model relates to machine tool accuracy bucking-out system, especially a kind of for compensating the backlash compensation actuator of ram rail plate microgap, gantry machining center side.
Background technology
In the heavy process equipments such as large-sized gantry numerical control machining center, vertical turning center, numerical control floor type boring and milling machine, square ram and saddle structure are one of important composition structures.Ram (Ram) is that the parts such as knife rest or main spindle box are housed, and have the pillow functional part that guide rail can move on lathe bed or miscellaneous part, and the guide rail of square ram is exactly himself substantially.The ram of existing heavy process equipment generally adopts square ram structure form, with square ram four sides fine grinding, forms guide pass, forms sliding friction guideway, and accompany by hydrodynamic lubrication or oil lubrication with saddle inner surface.The microgap that sliding friction pair exists, to form lubricating oil film, the precondition of the side's of being beneficial to ram movement, meanwhile, the existence of microgap is also the key factor that affects ram and saddle fit structure, when microgap is too small, can make borderline oil film break, frictional resistance significantly rises, thereby occurs that Digit Control Machine Tool Z axis feeding positioning precision declines, low speed jerking motion phenomenon aggravation, the even bad phenomenon such as locking of smooth, unstable wear of sliding; And when microgap is excessive, contact stiffness between ram and saddle weakens greatly, thereby cause the problems such as processing is trembled, the out-of-flatness of part finished surface, meanwhile, gap width δ itself is the factor of influence of machine finish, and being accompanied by stretching out of ram, gap width δ is amplified at double on the impact of positioning precision, thereby causes the positioning precision of lathe, repetitive positioning accuracy to reduce.
Based on above-mentioned analysis, the control of microgap between square ram and saddle structure value, plays an important role for the overall performance, machining accuracy etc. that promote lathe.The concrete analysis of the assembly structure form between side's ram and saddle, contribute to deepen understanding and a kind of rationally effectively compensation method of proposition that the other side's ram microgap forms reason, for the concrete assembly structure of square ram and saddle, refer to Figure of description 1 and 2, for the analysis of concrete structure, at description, be further described in detail hereinafter.
Summary of the invention
In order to overcome gantry machining center side's ram, adopt rail plate to exist microgap, when the side's of causing ram stretches out, support stiffness declines, degradation problem under machining accuracy decline while causing machine tooling, vibration cutting, piece surface crudy, the utility model proposes the backlash compensation actuator that a kind of microgap compensation precision is high, support stiffness is good.
The technical solution adopted for the present invention to solve the technical problems is:
One side's ram backlash compensation actuator, described backlash compensation actuator is little gradient wedge, the front end face of described backlash compensation actuator is plane, rear end face is inclined-plane, on described backlash compensation actuator, be provided with M Circular Thin pressure structure, described Circular Thin pressure structure comprises elastic springing thin-walled, pressurization oil pocket, end cap and sealing device, described elastic springing thin-walled is arranged on the front end face of backlash compensation actuator, on described end cap, have sealing ring deep gouge, mounting O-shaped sealing ring in described sealing ring deep gouge, described end cap is fixed by screws in the counterbore of backlash compensation actuator rear end face, form pressurization oil pocket, the thickness of described end cap does not exceed the rear end face of backlash compensation actuator, the laminating processing of described backlash compensation actuator front end face, on laminating, be provided with oil cavity, in described backlash compensation actuator, be provided with pressurization oil circuit and lubricant passage way.
Further, on described backlash compensation actuator, be provided with pressurization oil duct and oil leab, described pressurization oil duct is arranged on the center of backlash compensation actuator, the pressurization oil pocket of M Circular Thin pressure structure on backlash compensation actuator is connected, described oil leab is opened the side at described pressurization oil duct, described oil leab can not communicate with described pressurization oil duct, described oil leab has copper pipe deep gouge is installed in the side of backlash compensation actuator, at described copper pipe, buried tube type in deep gouge is installed copper pipe is installed, described copper pipe by near oil leab oil-in end with away from oil-in end, be connected, the oil-out of described oil leab is opened on the oil cavity of laminating of backlash compensation actuator.
Further again, described backlash compensation actuator is fixed on by contiguous block on the little gradient wedge shape installed surface of sliding saddle of machine tool, the position that described backlash compensation actuator is installed is the fixed position that wedge shape filler rod is adjusted in original gap, the front end face of described backlash compensation actuator is plane, for ram contact-making surface, the rear end face of described backlash compensation actuator is inclined-plane, corresponding with the little gradient wedge shape installed surface on saddle, eight backlash compensation actuators are fixed on saddle or saddle cover plate by contiguous block respectively, ram microgap, the side of formation compensation arrangement.
Preferably, on described contiguous block, be provided with backlash compensation actuator attachment screw hole, fixing screw hole, screwed hole is adjusted in gap, described backlash compensation actuator is fixed on the backlash compensation actuator installed surface of described contiguous block, described contiguous block is fixed on saddle by fixing screw hole, the rear end face of backlash compensation actuator is overlapped with the little gradient wedge shape installed surface on saddle, on described contiguous block, be also provided with pressurization oil duct oil-in, oil leab oil-in, on the backlash compensation actuator installed surface of described contiguous block, be provided with pressurization oil duct sealing ring deep gouge and oil leab sealing ring installation deep gouge are installed.
Preferably, three Circular Thin pressure structures are set to described backlash compensation actuator equal intervals.
The beneficial effects of the utility model are embodied in:
For gantry machining center side's ram, adopt rail plate to exist microgap, when the side's of causing ram stretches out, support stiffness declines, degradation problem under machining accuracy decline while causing machine tooling, vibration cutting, piece surface crudy, the backlash compensation actuator that a kind of microgap compensation precision is high, support stiffness is good has been proposed, field adjustable explanation, this system can effectively improve machine ram support stiffness, the piece surface crudy of improving lathe has certain compensation effect to Machine Tool Positioning Accuracy simultaneously.
Accompanying drawing explanation
Fig. 1 is gantry machining center ram saddle assembly structure schematic diagram
Fig. 2 is the structural representation that wedge shape filler rod and saddle are adjusted in gantry machining center ram, gap
Fig. 3 is the utility model backlash compensation actuating unit structural representation
Fig. 4 is the structure chart of the utility model backlash compensation actuator and contiguous block
Fig. 5 is the structure chart (another is attempted) of the utility model backlash compensation actuator and contiguous block
Fig. 6 is the structure perspective view of the utility model backlash compensation actuator and contiguous block
Fig. 7 is the utility model backlash compensation actuator Circular Thin pressure structure cutaway view
The specific embodiment
In conjunction with Fig. 1～Fig. 7, before introducing embodiment of the present utility model, paper gantry machining center square ram structure, assembly relation and square ram rail plate clearance adjustment method.
Ram and saddle structure adopt rail plate fit form, and its concrete structure is as follows: by reference to the accompanying drawings 1,2, and square ram 1 is arranged in saddle 101, fixing with cover plate 102, forms completely encircle structure.Ram sliding friction on the mating surface of saddle, has four guide supporting faces, wherein on saddle, has two face fine grindings, for datum level, and coordinate with these two faces, form two other face of encircling shape, i.e. working face on another side and cover plate on saddle, for adjusting face in gap.In existing lathe mounting technology, by gap adjust wedge shape filler rod adjust machine ram slide time microgap value δ, this microgap value δ becomes one of restraining factors that affect machine finish.The original gap of ram rail plate is adjusted, and generally adopts at present the artificial method of adjusting, and after ram is assembled on saddle, cover plate is assembled locked.There is certain gap in saddle inside in ram, adjusts wedge shape filler rod 104 carry out trace adjustment with gap, and main basis for estimation is the resistance to sliding of ram under hydrodynamic lubrication.Concrete method of adjustment and operation principle are shown in accompanying drawing 2, by the adjustment screw on contiguous block 3, make gap adjust wedge shape filler rod 104 and slide on the little gradient wedge shape installed surface 103 of saddle, and adjusting play size, and amount of taper is 1:100.Once original gap has been adjusted, just can not change.Therefore microgap value δ completes gap and adjusts the gap forming after wedge shape filler rod 104 is adjusted.
After having introduced the assembly structure of traditional gantry machining center ram, introduce by reference to the accompanying drawings side's ram backlash compensation actuator of the present utility model.
One side's ram backlash compensation actuator, described backlash compensation actuator 2 is little gradient wedge, the front end face of described backlash compensation actuator is plane, rear end face is inclined-plane, on described backlash compensation actuator, be provided with M Circular Thin pressure structure, described Circular Thin pressure structure comprises elastic springing thin-walled 2-12, pressurization oil pocket 2-4, end cap 2-1 and sealing device, described elastic springing thin-walled 2-12 is arranged on the front end face of backlash compensation actuator, on described end cap, have sealing ring deep gouge, mounting O-shaped sealing ring 2-13 in described sealing ring deep gouge, described end cap 2-1 is fixed by screws in the counterbore of backlash compensation actuator rear end face, form pressurization oil pocket 2-4, the thickness of described end cap does not exceed the rear end face of backlash compensation actuator, the laminating processing of described backlash compensation actuator front end face, on laminating, be provided with oil cavity 2-11, in described backlash compensation actuator, be provided with pressurization oil circuit 2-6 and lubricant passage way 2-7.
On described backlash compensation actuator, be provided with pressurization oil duct 2-6 and oil leab 2-7, described pressurization oil duct is arranged on the center of backlash compensation actuator, the pressurization oil pocket 2-4 of M Circular Thin pressure structure on backlash compensation actuator is connected, described oil leab is opened the side at described pressurization oil duct, described oil leab can not communicate with described pressurization oil duct, described oil leab has copper pipe deep gouge 2-3 is installed in the side of backlash compensation actuator, at described copper pipe, buried tube type in deep gouge is installed copper pipe is installed, described copper pipe by near oil leab oil-in end with away from oil-in end, be connected, the oil-out 2-10 of described oil leab opens on the oil cavity 2-11 of laminating of backlash compensation actuator.
Described backlash compensation actuator is fixed on by contiguous block 3 on the little gradient wedge shape installed surface of sliding saddle of machine tool, the position that described backlash compensation actuator is installed is the fixed position that wedge shape filler rod is adjusted in original gap, the front end face of described backlash compensation actuator is plane, for ram contact-making surface, the rear end face of described backlash compensation actuator is inclined-plane, corresponding with the little gradient wedge shape installed surface on saddle, eight backlash compensation actuators are fixed on saddle or saddle cover plate by contiguous block respectively, ram microgap, the side of formation compensation arrangement, is shown in accompanying drawing 3.
On described contiguous block, be provided with backlash compensation actuator attachment screw hole 2-14, fixing screw hole 2-15, screwed hole 2-16 is adjusted in gap, described backlash compensation actuator is fixed on the backlash compensation actuator installed surface of described contiguous block, described contiguous block is fixed on saddle by fixing screw hole, the rear end face of backlash compensation actuator is overlapped with the little gradient wedge shape installed surface on saddle, on described contiguous block, be also provided with pressurization oil duct oil-in 2-2, oil leab oil-in 2-5, on the backlash compensation actuator installed surface of described contiguous block, be provided with pressurization oil duct sealing ring deep gouge 2-8 and oil leab sealing ring installation deep gouge 2-9 are installed.The backlash compensation actuator installed surface of described backlash compensation actuator and described contiguous block is realized the end face seal of pressurization oil duct and oil leab by sealing ring.
Three Circular Thin pressure structures are set to described backlash compensation actuator equal intervals.
Hydraulic oil by the pressurization oil duct oil-in 2-2 of described contiguous block after contiguous block internal duct, after end face seal, enter after the pressurization oil duct of described backlash compensation actuator, enter into the pressurization oil pocket of Circular Thin pressure structure, realize the elastic springing of Circular Thin pressure structure; Lubricating oil is by the oil leab oil-in 2-5 of described contiguous block, after contiguous block internal duct, after end face seal, enter the oil leab of described backlash compensation actuator, by the oil-out 2-10 of oil leab, enter into oil cavity, the lubricating when side's of realization ram slides.
The operation principle of this embodiment is as follows: the compensation of ram microgap, gantry machining center side, by backlash compensation actuator, completed, the Circular Thin pressure structure of backlash compensation actuator, under the effect of internal pressure oil, can produce accurately, support stiffness is high, controlled, repeatably micro-distortion, for the microgap of the side's of compensation ram, Circular Thin pressure structure is out of shape being subject to, under internal pressure effect, bending elasticity occurs, from principle angle analysis, based on elastic properties of materials deformation principle and thin plate minor deflection bending theory, the characteristic of Circular Thin pressure structure generation deflection deformation most critical is mainly by 2 points, first, deflection deformation compensation rate is directly proportional to internal pressure value, this is the Circular Thin pressure structure controlled basis of actuator by way of compensation, the second, the distortion after the compensation of Circular Thin pressure structure has very high support stiffness, and this is to prevent machine tooling vibrations, promotes the key factor of lathe cutting ability.
Claims (7)
1. a square ram backlash compensation actuator, described backlash compensation actuator is little gradient wedge, it is characterized in that, the front end face of described backlash compensation actuator is plane, rear end face is inclined-plane, on described backlash compensation actuator, be provided with M Circular Thin pressure structure, described Circular Thin pressure structure comprises elastic springing thin-walled, pressurization oil pocket, end cap and sealing device, described elastic springing thin-walled is arranged on the front end face of backlash compensation actuator, on described end cap, have sealing ring deep gouge, mounting O-shaped sealing ring in described sealing ring deep gouge, described end cap is fixed by screws in the counterbore of backlash compensation actuator rear end face, form pressurization oil pocket, the thickness of described end cap does not exceed the rear end face of backlash compensation actuator, the laminating processing of described backlash compensation actuator front end face, on laminating, be provided with oil cavity, in described backlash compensation actuator, be provided with pressurization oil circuit and lubricant passage way.
2. backlash compensation actuator as claimed in claim 1, it is characterized in that: on described backlash compensation actuator, be provided with pressurization oil duct and oil leab, described pressurization oil duct is arranged on the center of backlash compensation actuator, the pressurization oil pocket of M Circular Thin pressure structure on backlash compensation actuator is connected, described oil leab is opened the side at described pressurization oil duct, described oil leab can not communicate with described pressurization oil duct, described oil leab has copper pipe deep gouge is installed in the side of backlash compensation actuator, at described copper pipe, buried tube type in deep gouge is installed copper pipe is installed, described copper pipe by near oil leab oil-in end with away from oil-in end, be connected, the oil-out of described oil leab is opened on the oil cavity of laminating of backlash compensation actuator.
3. backlash compensation actuator as claimed in claim 1, it is characterized in that: described backlash compensation actuator is fixed on by contiguous block on the little gradient wedge shape installed surface of sliding saddle of machine tool, the position that described backlash compensation actuator is installed is the fixed position that wedge shape filler rod is adjusted in original gap, the front end face of described backlash compensation actuator is plane, for ram contact-making surface, the rear end face of described backlash compensation actuator is inclined-plane, corresponding with the little gradient wedge shape installed surface on saddle, eight backlash compensation actuators are fixed on saddle or saddle cover plate by contiguous block respectively, ram microgap, the side of formation compensation arrangement.
4. the backlash compensation actuator as described in claim 1 or 2 or 3, it is characterized in that: the thin plate that the elastic springing thin-walled of described Circular Thin pressure structure is uniform thickness, one-tenth-value thickness 1/10 determines by the synthesis result of theory calculating, model analysis and experiment test, and the accuracy of manufacture of one-tenth-value thickness 1/10 guarantees in ± 0.02mm;
5. the backlash compensation actuator as described in claim 1 or 2 or 3, it is characterized in that: the elastic springing thin-walled of described Circular Thin pressure structure is fixedly connected with periphery, the stress that adopts rounding structure to weaken junction is concentrated, and also can adopt ring-shaped groove or love groove structure;
6. the backlash compensation actuator as described in claim 1 or 2 or 3, it is characterized in that: on described contiguous block, be provided with backlash compensation actuator attachment screw hole, fixing screw hole, screwed hole is adjusted in gap, described backlash compensation actuator is fixed on the backlash compensation actuator installed surface of described contiguous block, described contiguous block is fixed on saddle by fixing screw hole, the rear end face of backlash compensation actuator is overlapped with the little gradient wedge shape installed surface on saddle, on described contiguous block, be also provided with pressurization oil duct oil-in, oil leab oil-in, on the backlash compensation actuator installed surface of described contiguous block, be provided with pressurization oil duct sealing ring deep gouge and oil leab sealing ring installation deep gouge are installed.
7. the backlash compensation actuator as described in claim 1 or 2 or 3, is characterized in that: three Circular Thin pressure structures are set to described backlash compensation actuator equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320774510.5U CN203542244U (en) | 2013-11-27 | 2013-11-27 | Square ram gap compensation actuator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320774510.5U CN203542244U (en) | 2013-11-27 | 2013-11-27 | Square ram gap compensation actuator |
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| CN203542244U true CN203542244U (en) | 2014-04-16 |
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| CN201320774510.5U Expired - Fee Related CN203542244U (en) | 2013-11-27 | 2013-11-27 | Square ram gap compensation actuator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710698A (en) * | 2016-03-24 | 2016-06-29 | 浙江大学 | Sliding saddle used for square guide rail backlash compensation experiment and application method |
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2013
- 2013-11-27 CN CN201320774510.5U patent/CN203542244U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710698A (en) * | 2016-03-24 | 2016-06-29 | 浙江大学 | Sliding saddle used for square guide rail backlash compensation experiment and application method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20141127 |
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| EXPY | Termination of patent right or utility model |