CN102699767B - Thermal deformation automatic compensation mechanism for screw rod and machine tool - Google Patents
Thermal deformation automatic compensation mechanism for screw rod and machine tool Download PDFInfo
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- CN102699767B CN102699767B CN201210170413.5A CN201210170413A CN102699767B CN 102699767 B CN102699767 B CN 102699767B CN 201210170413 A CN201210170413 A CN 201210170413A CN 102699767 B CN102699767 B CN 102699767B
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Abstract
The invention provides a thermal deformation automatic compensation mechanism for a screw rod and a machine tool. The thermal deformation automatic compensation mechanism for the screw rod comprises a fixed mounting seat, a bearing, a first axial limiting part, a ferrule and an elastic clamping part, wherein the fixed mounting seat is mounted on a fixed pivot; an annular chamber is formed between the fixed mounting seat and the screw rod; the bearing is mounted in the annular chamber and is sleeved on the screw rod; the first axial limiting part is mounted on the screw rod and is arranged close to the first end of the bearing; the first axial limiting part is in supported press contact with an inner ring of the bearing; the ferrule is sleeved in the annular chamber and is arranged close to the second end of the bearing; the ferrule is fixedly connected with an outer ring of the bearing; a pressure chamber is arranged in the fixed mounting seat and is connected with a pressure oil source through an oil path; a hole is formed in the fixed mounting seat; the first end of the hole is communicated with the pressure chamber; the second end of the hole corresponds to the outer circumferential wall of the ferrule; and the elastic clamping part is positioned in the pressure chamber and is converted on a hole shoulder of the hole, so that the pressure chamber is separated from the hole. The technical scheme adopted by the invention has the advantages of simple structure, strong generality and capability of effectively reducing the thermal error of the machine tool.
Description
Technical field
The present invention relates to field of machining, more specifically, relate to a kind of leading screw automatic compensation for thermal deformation mechanism and lathe.
Background technology
Thermic error is the worst error source of Digit Control Machine Tool, accounts for the 40%-70% of lathe overall error, and therefore reducing hot error is the most effective mode that reduces machine tool error.At present, reducing thermal deformation of machine tool generally has three kinds of modes: the one, improve lathe mechanism, and the 2nd, temperature control, the 3rd, temperature-compensating.Improve machine tool structure and refer in the time of design lathe, according to the rational alternative pack material of thermal coefficient of expansion, control the direction of thermal deformation and hot error, thereby effectively prevent that the thermal deformation of vitals from exerting an influence to machine tool accuracy.Temperature control refers to by arranging that on lathe critical component heating element heater or cooling body realize the equilibrium of lathe bulk temperature field.These two kinds of modes are the temperature of lathe to be implemented to control on thermal source head, and mode one, because the optional scope of machine tool element material is limited, makes lathe cost difficult control relatively; Mode two need to increase more element with practical function, is subject to the structural limitations of lathe own more, and effect is not very desirable, and therefore the application limitation of these two kinds of modes is larger.Temperature-compensating is a kind of heat error compensation technology, as a kind of feedback technique, the error that it has produced during to digital control processing by various means is measured, then carry out error compensation calculating according to the error compensation model of having set up, eliminate influence of thermal deformation, the method is the Main Means of eliminating thermal deformation of machine tool, improving machining accuracy at present, but the method needs the participation of digital control system, because the lathe for dissimilar need to do different error compensation models, so the versatility of this kind of method is poor.Therefore, need badly a kind of simple in structure, highly versatile, the mechanism that can effectively reduce machine tool thermal error will be provided simultaneously.
Summary of the invention
The present invention is intended to propose a kind of simple in structure, highly versatile, the leading screw automatic compensation for thermal deformation mechanism that can effectively reduce machine tool thermal error simultaneously.The invention allows for a kind of lathe.
According to an aspect of the present invention, provide a kind of leading screw automatic compensation for thermal deformation mechanism, having comprised: fixed mounting, be installed on fixed pivot, between fixed mounting and leading screw, be formed with annular chamber; Bearing, is arranged in annular chamber, and is set on leading screw; The first axial limiting part, is arranged on leading screw and the first end setting of close bearing; The first axial limiting part compresses and contacts with the inner ring of bearing; Lasso, is set in annular chamber and the second end setting of close bearing; Lasso is fixedly connected with the outer ring of bearing; In fixed mounting, be provided with pressure chamber, pressure chamber is connected with pressure oil-source by oil circuit; On fixed mounting, be also provided with hole, the first end in hole is communicated with pressure chamber, and the second end is corresponding to the periphery wall of lasso; Elastic clamping part, being positioned at pressure chamber lid, to be located at the hole shoulder in hole upper, and pressure chamber and hole are isolated.
Further, fixed mounting comprises: bearing block, is fixed in frame; Blind flange, comprises the end cap portions and the sleeve part that are connected; The first end of end cap portions and bearing block is connected by screw; Sleeve part is set in bearing block, and forms annular chamber between the endoporus of sleeve part and leading screw; On sleeve part, along circumferentially offering cannelure, cannelure coordinates mineralization pressure chamber with the inner hole wall of bearing block; Hole is multiple, along being circumferentially evenly arranged on sleeve part; On bearing block, offer the oil inlet and oil return passage for pressure chamber is communicated with pressure oil-source.
Further, elastic clamping part is set in cannelure, and is provided with hermetically-sealed construction between elastic clamping part and bearing block.
Further, be formed with stage portion on leading screw, the first axial limiting part is the back-up ring being folded between stage portion and bearing, is also provided with first and blocks flange on back-up ring.
Further, in the end cap portions of blind flange, be also provided with second and block flange.
Further, the second end of bearing block is provided with for the backstop flange spacing to the sleeve part of blind flange.
Further, the second axial limiting part is also installed on leading screw, the second axial limiting part is near the second end setting of bearing and compress and contact with the inner ring of bearing.
Further, the second axial limiting part comprises: inner spacing collar is adjacent with the inner ring of bearing; Nut, is positioned at the outer end of inner spacing collar and is spirally connected with leading screw.
Further, on bearing block, the position of corresponding oil inlet and oil return passage is provided with pipe joint.
Another aspect, the present invention also provides a kind of lathe, and above-mentioned leading screw automatic compensation for thermal deformation mechanism is set.
The technical scheme of leading screw automatic compensation for thermal deformation provided by the invention mechanism, bearing holder (housing, cover) is located on leading screw; The first axial limiting part is arranged on leading screw, and this first axial limiting part compresses and contacts near the setting of bearing first end and with the inner ring of bearing; Lasso is set in bearings mounted annular chamber, and this lasso is near bearing the second end setting and be fixedly connected with the outer ring of bearing.Easily understand, when the pressure chamber of fixed mounting is not yet when injection pressure oil, bearing can move axially along leading screw in fixed mounting, be i.e. the supported for float support of fixed mounting to bearing.
In the time that the lathe startup of this leading screw automatic compensation for thermal deformation mechanism is installed, the dynamical system of lathe drives leading screw and mobile unit thereof to carry out feeding race and motion, after a period of time, leading screw reaches thermal equilibrium state, now, controlled pressure oil sources by oil circuit to pressure chamber injection pressure oil, dilatancy after elastic clamping part pressurized, after the part distortion of elastic clamping part corresponding aperture, compress and contact with lasso, elastic clamping part is able to clamping collar, because the outer ring of lasso and bearing is fixedly connected with, so making the position of bearing in fixed mounting fixes, thereby realize the fixed support of fixed mounting to bearing, improve the rigidity of support of leading screw.Then lathe starts processing, cause now leading screw had carried out running and motion the poised state after thermal deformation, lathe can not occur causing the poor problem of machining accuracy because of the thermic error compared with large in the process that continues operation again, effectively reduce machine tool thermal error, and this leading screw automatic compensation for thermal deformation mechanism structure is simple, do not need the participation of digital control system, be easy to realize.In addition, this leading screw automatic compensation for thermal deformation mechanism can be applicable to the transmission mechanism of various lathes, highly versatile, and transmission accuracy and the service life that can effectively improve machine tool transmission system.
After machine tooling completes, in the time of standby or stopped status, can lay down pressure oil, make bearing again in float support state, so that processing next time.
Brief description of the drawings
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the sectional structure of the preferred embodiment of leading screw automatic compensation for thermal deformation of the present invention mechanism;
Fig. 2 has schematically shown the stereochemical structure of blind flange in the preferred embodiment of the present invention; And,
Fig. 3 has schematically shown the stereochemical structure of preferred embodiment of the present invention Elastic clamping element.
Detailed description of the invention
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can combine mutually.Describe below with reference to the accompanying drawings and in conjunction with the embodiments the present invention in detail.
Referring to Fig. 1 to Fig. 3, show the structure of leading screw automatic compensation for thermal deformation provided by the invention mechanism preferred embodiment.As shown in the figure, this leading screw automatic compensation for thermal deformation mechanism at least comprises: fixed mounting 1, bearing 2, the first axial limiting part 3, lasso 4 and elastic clamping part 5.As can be seen from Figure, be provided with feed screw nut 92 on leading screw 9, at least one end of leading screw 9 is by this leading screw automatic compensation for thermal deformation mechanism supports.
Particularly, fixed mounting 1 is installed on fixed pivot, and for example fixed mounting 1 is fixedly installed in the frame (not shown) of lathe by bolt 63 and screw.Between fixed mounting 1 and leading screw 9, be formed with annular chamber (in figure not label).Bearing 2 is arranged in annular chamber and is set on leading screw 9, and bearing 2 is arranged between fixed mounting 1 and leading screw 9.The first axial limiting part 3 is arranged on leading screw 9, and this first axial limiting part 3 is near the first end setting of bearing 2 and compress and contact with the inner ring of bearing 2, for the first end of bearing 2 is carried out to axial limiting.Lasso 4 is set in annular chamber and near the second end setting of bearing 2, and lasso 4 is fixedly connected with the outer ring of bearing 2, and for example the outer ring of bearing 2 is connected with lasso 4 by screw 62.Lasso 4 carries out axial limiting for the second end to bearing 2.As can be seen from Figure, the interior pore radius of lasso 4 is greater than the inner ring external diameter of bearing 2, between the endoporus of lasso 4 and leading screw 9, is formed with annular gap.
In fixed mounting 1, be provided with pressure chamber 13, pressure chamber 13 is connected with pressure oil-source (not shown) by oil circuit.On fixed mounting 1, be also provided with hole 14, the first end in hole 14 is communicated with pressure chamber 13, and the second end is corresponding to the periphery wall of lasso 4.Elastic clamping part 5 is positioned at pressure chamber 13 lid, and to be located at the hole shoulder in hole 14 upper, and elastic clamping part 5 is for isolating pressure chamber 13 and hole 14.
Adopt technical scheme of the present invention, easily understand, when the pressure chamber 13 of fixed mounting 1 is not yet when injection pressure oil, bearing 2 can move axially along leading screw 9 in fixed mounting 1, be i.e. the supported for float support of fixed mounting 1 to bearing 2.
In the time that the lathe startup of this leading screw automatic compensation for thermal deformation mechanism is installed, the dynamical system of lathe drives leading screw 9 and mobile unit thereof to carry out feeding race and motion, after a period of time, leading screw 9 reaches thermal equilibrium state, now, controlled pressure oil sources by oil circuit to pressure chamber 13 injection pressure oil, dilatancy after elastic clamping part 5 pressurizeds, after the part distortion of elastic clamping part 5 corresponding apertures 14, compress and contact with lasso 4, elastic clamping part 5 is able to clamping collar 4, again because lasso 4 is fixedly connected with the outer ring of bearing 2, described bearing 2 position in fixed mounting 1 under the effect of the first axial limiting part 3 and lasso 4 is fixed, thereby realize the fixed support of fixed mounting 1 to bearing 2, improve the rigidity of support of leading screw 9.Then lathe starts processing, cause now leading screw 9 had been carried out feeding race and motion the poised state after thermal deformation, lathe can not occur causing the poor problem of machining accuracy because of the thermic error compared with large in the process that continues operation again, and this leading screw automatic compensation for thermal deformation mechanism structure is simple, do not need the participation of digital control system, be easy to realize.In addition, this leading screw automatic compensation for thermal deformation mechanism can be applicable to the transmission mechanism of various lathes, highly versatile, and transmission accuracy and the service life that can effectively improve machine tool transmission system.Preferably, elastic clamping part 5 and lasso 4 adopt the materials processing that coefficient of friction is large to form, and under the effect of pressure oil, can reach the clamping force needing.
After machine tooling completes, in the time of standby or stopped status, can lay down pressure oil, make bearing 2 again in float support state, so that processing next time.
Easily understand, the pressure of the pressure oil in injection pressure chamber 13 and flow are determined according to required clamping force, are generally 10Mpa-30Mpa.
Come again referring to Fig. 1 to Fig. 3, the preferred embodiment of fixed mounting 1 and elastic clamping part 5 has been shown in the present embodiment.As shown in the figure, fixed mounting 1 comprises bearing block 11 and blind flange 12 further.Bearing block 11 is fixed in the frame of lathe by bolt 63 and screw.Blind flange 12 comprises the end cap portions 121 and the sleeve part 122 that are connected.Wherein, end cap portions 121 is connected by screw 61 with the first end of bearing block 11, and sleeve part 122 is set in bearing block 11, and between the endoporus of sleeve part 11 and leading screw 9, is formed for installing the annular chamber of bearing 2 and sheathed lasso 4.On sleeve part 122, along circumferentially offering cannelure 123, cannelure 123 coordinates mineralization pressure chamber 13 with the inner hole wall of bearing block 11.Hole 14 is multiple, along being circumferentially evenly arranged on sleeve part 122.By finding out in Fig. 2, hole 14 can be square opening, is arranged on the bottom land of cannelure 123 and is uniformly distributed circumferentially multiple.On bearing block 11, offer the oil inlet and oil return passage 111 for pressure chamber 13 is communicated with pressure oil-source, preferably, on bearing block 11, the position of corresponding oil inlet and oil return passage 111 is provided with pipe joint 8, and exterior line is communicated with pressure chamber 13 by pipe joint 8 with pressure oil-source.
Elastic clamping part 5 is set in cannelure 123, and is provided with hermetically-sealed construction between elastic clamping part 5 and bearing block 11.Like this, making between pressure chamber 13 and hole 14 is seal isolation, avoids pressure oil by revealing in pressure chamber 13.Preferably, see Fig. 3, elastic clamping part 5 is elastic clamping ring, is set in cannelure 123, on the axial two ends of elastic clamping part 5, is all formed with bulge loop 51, is equipped with the seal groove 52 for being embedded O type circle on each bulge loop 51.Preferably, elastic clamping part 5 can adopt copper alloy to process, and good springiness and coefficient of friction are larger.Preferably, the second end of bearing block 11 is provided with the backstop flange 112 spacing for the sleeve part 122 to blind flange 12, makes blind flange 12 more reliable with being fixedly connected with of bearing block 11.
Preferably, on leading screw 9, be formed with stage portion 91, the first axial limiting parts 3 for being folded in the back-up ring between stage portion 91 and bearing 2.On back-up ring, be also provided with first and block flange 31, this first blocks flange 31 and can be arranged on back-up ring one end near stage portion 91, for preventing that foreign material from entering the interior rear serviceability that affects bearing 2 of bearing 2.Preferably, be also provided with second and block flange 124 in the end cap portions 121 of blind flange 12, this second blocks flange 124 and first and blocks flange 31 and match, and enters in bearing 2 with backstop foreign material better.Certainly,, in the unshowned embodiment of one, this first axial limiting part 3 can also directly be formed by the stage portion of leading screw 9 91.
Preferably, the second axial limiting part 7, the second axial limiting parts 7 be also installed on leading screw 9 near the second end setting of bearing 2 and compress and contact with the inner ring of bearing 4, the position of bearing 2 inner rings on leading screw 9 fixed.In Fig. 1, also show the preferred embodiment of the second axial limiting part 7, this second axial limiting part 7 comprises inner spacing collar 71 and nut 72.Inner spacing collar 71 is adjacent with the inner ring of bearing 4, and nut 72 is positioned at the outer end of inner spacing collar 71 and is spirally connected with leading screw 9, and nut 72 can adopt locking nut 72, has reduced the loosening possibility of nut 72.
The assembling process of the preferred embodiment of above-mentioned leading screw automatic compensation for thermal deformation mechanism is as described below:
1) first bearing block 11 is fixed on by bolt 63 and screw in the frame or lathe bed of lathe, then the elastic clamping part 5 that is embedded with O type circle is arranged on blind flange 12, then blind flange 12 is packed in bearing block 11, and by blind flange 12 and bearing block 11, the two is fixed with screw 61;
2) the first axial limiting part 3, bearing 2, inner spacing collar 71, nut 72 are set in successively to one end of leading screw 9, the outer ring of lasso 4 and bearing 2 are fixed together with screw 62;
3) the assembly entirety of step 2 gained is packed in blind flange 12, pipe joint 8 is screwed in bearing block 11.Assembling completes.
It should be noted that, in an embodiment of the present invention, bearing 2 is combined by two bearings that are arranged side by side 21 and bearing 22, and in other unshowned embodiment, bearing 2 also can only adopt a bearing.
In addition, exemplified out the detailed description of the invention of fixed mounting 1 in above preferred embodiment, easily understood, in actual applications, fixed mounting 1 can also have numerous embodiments.For example, the cavity that pressure chamber 13 is multiple mutual isolation, upwards be uniformly distributed in week, the cross section of each cavity is fan-shaped, now the structure of elastic clamping part 5 also can change to adapt to the shape of pressure chamber 13, and each independently pressure chamber 13 also should be communicated with pressure oil-source by the oil discharge passage that enters separately respectively.Or cannelure 123 is opened on bearing block 11, hole 14 is opened on the sleeve part 122 of blind flange 12, and the structure of elastic clamping part 5 is constant, can reach equally above-mentioned technique effect.
Leading screw automatic compensation for thermal deformation of the present invention mechanism tool has the following advantages: versatility is good, simple in structure, is easy to realize, and not needing increases excessive zero parts, can be used for various lathes; Due to leading screw in work in the extended state that is heated, idle time in relaxation state, therefore leading screw to beginning to eventually all in its most natural state, effectively extended the service life of leading screw, can be widely used on high-end Digit Control Machine Tool; Reliability is high, and compensation effect is not affected by lathe surrounding enviroment, service life etc.; Compensation precision is high, compensates according to the instant operating mode of lathe.
The present invention also provides a kind of lathe, and above-mentioned leading screw automatic compensation for thermal deformation mechanism is set.Because leading screw automatic compensation for thermal deformation provided by the invention mechanism has above-mentioned advantage, described in be provided with this leading screw automatic compensation for thermal deformation mechanism lathe also should there is above-mentioned advantage, do not repeat them here.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a leading screw automatic compensation for thermal deformation mechanism, is characterized in that, comprising:
Fixed mounting (1), is installed on fixed pivot, between described fixed mounting (1) and leading screw (9), is formed with annular chamber;
Bearing (2), is arranged in described annular chamber, and is set on described leading screw (9);
The first axial limiting part (3), the one end that is arranged on the upper and close described bearing (2) of described leading screw (9) arranges; Described the first axial limiting part (3) compresses and contacts with the inner ring of described bearing (2);
Lasso (4), is set in described annular chamber and the other end setting of close described bearing (2); Described lasso (4) is fixedly connected with the outer ring of described bearing (2);
In described fixed mounting (1), be provided with pressure chamber (13), described pressure chamber (13) is connected with pressure oil-source by oil circuit; On described fixed mounting, be also provided with hole (14), the first end of described hole (14) is communicated with described pressure chamber (13), and the second end is corresponding to the periphery wall of described lasso (4);
Elastic clamping part (5), being positioned at described pressure chamber (13) lid, to be located at the hole shoulder in described hole (14) upper, makes described pressure chamber (13) and described hole (14) isolation.
2. leading screw automatic compensation for thermal deformation according to claim 1 mechanism, is characterized in that, described fixed mounting (1) comprising:
Bearing block (11), is fixed in frame;
Blind flange (12), comprises the end cap portions (121) and the sleeve part (122) that are connected; Described end cap portions (121) is connected by screw (61) with one end of described bearing block (11); Described sleeve part (122) is set in described bearing block (11), and forms described annular chamber between the endoporus of described sleeve part (11) and described leading screw (9);
Described sleeve part (122) is upper along circumferentially offering cannelure (123), and described cannelure (123) coordinates the described pressure chamber of formation (13) with the inner hole wall of described bearing block (11); Described hole (14) is multiple, along being circumferentially evenly arranged on described sleeve part (122);
On described bearing block (11), offer the oil inlet and oil return passage (111) for described pressure chamber (13) is communicated with described pressure oil-source.
3. leading screw automatic compensation for thermal deformation according to claim 2 mechanism, it is characterized in that, described elastic clamping part (5) is set in described cannelure (123), and is provided with hermetically-sealed construction between described elastic clamping part (5) and described bearing block (11).
4. leading screw automatic compensation for thermal deformation according to claim 3 mechanism, it is characterized in that, on described leading screw (9), be formed with stage portion (91), described the first axial limiting part (3), for being folded in the back-up ring between described stage portion (91) and described bearing (2), is also provided with first and blocks flange (31) on described back-up ring.
5. leading screw automatic compensation for thermal deformation according to claim 4 mechanism, is characterized in that, is also provided with second and blocks flange (124) in the end cap portions (121) of described blind flange (12).
6. leading screw automatic compensation for thermal deformation according to claim 2 mechanism, is characterized in that, the other end of described bearing block (11) is provided with the backstop flange (112) spacing for the sleeve part to described blind flange (12) (122).
7. according to the leading screw automatic compensation for thermal deformation mechanism described in any one in claim 1 to 6, it is characterized in that, the second axial limiting part (7) is also installed on described leading screw (9), and the other end setting of the close described bearing of described the second axial limiting part (7) also compresses and contacts with the inner ring of described bearing (4).
8. leading screw automatic compensation for thermal deformation according to claim 7 mechanism, is characterized in that, described the second axial limiting part (7) comprising: inner spacing collar (71) is adjacent with the inner ring of described bearing (4); Nut (72), is positioned at the outer end of described inner spacing collar (71) and is spirally connected with described leading screw (9).
9. leading screw automatic compensation for thermal deformation according to claim 2 mechanism, is characterized in that, in the position of the upper corresponding described oil inlet and oil return passage (111) of described bearing block (11), pipe joint (8) is installed.
10. a lathe, is characterized in that, is provided with the leading screw automatic compensation for thermal deformation mechanism described in any one in claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210170413.5A CN102699767B (en) | 2012-05-28 | 2012-05-28 | Thermal deformation automatic compensation mechanism for screw rod and machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210170413.5A CN102699767B (en) | 2012-05-28 | 2012-05-28 | Thermal deformation automatic compensation mechanism for screw rod and machine tool |
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| Publication Number | Publication Date |
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| CN102699767A CN102699767A (en) | 2012-10-03 |
| CN102699767B true CN102699767B (en) | 2014-07-16 |
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| CN201210170413.5A Expired - Fee Related CN102699767B (en) | 2012-05-28 | 2012-05-28 | Thermal deformation automatic compensation mechanism for screw rod and machine tool |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104483896B (en) * | 2014-11-18 | 2017-05-17 | 四川普什宁江机床有限公司 | Method for realizing thermal compensation of lead screw of numerical control machine tool |
| CN108188821B (en) * | 2018-01-08 | 2019-04-26 | 东北大学 | A kind of Ball-screw in NC Machine Tools feed system Thermal Error prediction technique |
| CN111720510A (en) * | 2020-05-22 | 2020-09-29 | 福建省黑石精密机械有限公司 | High-precision movement shaft of machine tool and working method |
| CN113211160B (en) * | 2021-04-08 | 2022-05-03 | 北京工业大学 | Ball screw pair thermal deformation compensation system and method based on extreme gradient lifting |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4203994A1 (en) * | 1992-02-12 | 1993-08-19 | Hermle Berthold Maschf Ag | MACHINE TOOL WITH AN AUTOMATIC THERMAL EXPANSION COMPENSATION DEVICE |
| DE19809931A1 (en) * | 1998-03-07 | 1999-09-09 | Traub Drehmaschinen Gmbh | Method and device for machining workpieces |
| CN101791771B (en) * | 2009-12-31 | 2013-08-07 | 重庆大学 | Thermal error differential screw compensating device and using method thereof |
| CN101844317B (en) * | 2010-03-25 | 2011-12-14 | 合肥工业大学 | Device and method for correcting transmission error of precise numerical control machine closed loop servo system |
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Effective date of registration: 20151016 Address after: 201400, Shanghai, Fengxian District, 19 Lang Road, No. 3 Patentee after: SHANGHAI BRANCH OF SANY GROUP CO., LTD. Address before: 201413, No. two, 318 Avenue, Lingang Industrial Park, Shanghai, Fengxian District Patentee before: Seiki Co., Ltd. Shanghai Sany |
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