CN111761397A - Magnetic servo ball screw supporting device of gantry machining center - Google Patents
Magnetic servo ball screw supporting device of gantry machining center Download PDFInfo
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- CN111761397A CN111761397A CN202010695760.4A CN202010695760A CN111761397A CN 111761397 A CN111761397 A CN 111761397A CN 202010695760 A CN202010695760 A CN 202010695760A CN 111761397 A CN111761397 A CN 111761397A
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- screw
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- linear guide
- nut seat
- machining center
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
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Abstract
A magnetic force follow-up ball screw supporting device for a gantry machining center relates to the technical field of machine tool screw supporting, and comprises two linear guide rails which are parallel to a screw and arranged below the screw, wherein slide blocks capable of sliding along the linear guide rails are respectively matched on the linear guide rails, stop blocks for stopping the slide blocks from sliding are respectively fixed at the opposite ends of the two linear guide rails, a screw supporting part for supporting the screw is fixed on the slide blocks, a nut seat is fixed on a screw nut, a permanent magnet A is fixed on the nut seat, the nut seat is positioned between the two slide blocks, a permanent magnet B is respectively fixed on the two slide blocks, and the different poles of the permanent magnet A and the permanent magnet B are opposite when the nut seat moves to the upper part of the slide blocks. The requirement of high-speed and high-precision operation of the large-stroke machine tool is met.
Description
The technical field is as follows:
the invention relates to the technical field of machine tool lead screw supporting, in particular to a magnetic servo ball screw supporting device for a gantry machining center.
Background art:
for a large-stroke machine tool, if a horizontal shaft ball screw is not supported by a screw rod, when the length of the screw rod is more than or equal to 4 meters, the screw rod is influenced by factors such as temperature and gravity, the middle part of the screw rod has large natural sag, and when the machine tool works in the state, the ball screw rotates at high speed to generate large vibration, so that the transmission precision and the service life of the ball screw are directly influenced, and the overall performance of the machine tool is also influenced.
The ball screw supporting device disclosed so far mainly has two types, a fixed type and a follow-up type.
The fixed device generally adopts a hydraulic or spring form, has a complex structure and has large impact on the lead screw. The requirements on the machining and assembling precision of used parts are strict, the installation and debugging are difficult, the reliability is low, and a high-speed machine tool cannot be used;
the follow-up type supporting devices disclosed in the prior patent numbers "201520335616.4", "201620189655.2" and "201720598034.4" all require two supporting points to be connected into a whole through an intermediate connecting rod and then synchronously follow-up supporting is carried out. The position accuracy of two supporting points of the device is kept consistent, and the installation and debugging are time-consuming and labor-consuming; because the installation space is limited, the deflection deformation of the middle connecting rod is large after the middle connecting rod reaches a certain length, and the bending deformation is serious. When one supporting point runs at a high speed along with the screw nut, the other supporting point synchronously moves at a high speed to generate large impact on the screw due to insufficient rigidity of the middle connecting rod, and the service life of the ball screw of the machine tool is seriously influenced.
The invention content is as follows:
in order to solve the technical problems, the invention provides the magnetic follow-up ball screw supporting device for the gantry machining center, which is relatively simple in structure, free of rigid connection between two supporting points, and capable of running independently, solving the problem of high-speed impact of the large-stroke screw support, and meeting the requirement of high-speed and high-precision running of a large-stroke machine tool.
The invention is realized by the following technical scheme:
the utility model provides a longmen machining center magnetic force follow-up ball screw strutting arrangement, characterized by includes and is parallel to and locates two linear guide below the lead screw with the lead screw, the last cooperation of linear guide has respectively can follow the gliding slider of linear guide, and the relative one end of two linear guide is fixed with respectively blocks the gliding dog of slider, be fixed with the lead screw supporting part that supports the lead screw on the slider, is fixed with the nut seat on the lead screw nut, be fixed with permanent magnet A on the nut seat, the nut seat is located between two sliders, is fixed with permanent magnet B on two sliders respectively, permanent magnet A is opposite with permanent magnet B heteropolarity when the nut seat moves to the slider top.
In another aspect of the present invention, the screw supporting portion includes a wear-resistant block fixed to an upper end of the slider, and the upper end of the wear-resistant block is provided with a groove having a semicircular cross section, and the groove is supported at a lower portion of the screw.
In another aspect of the invention, permanent magnets B are respectively fixed to both side ends of the wear-resistant block, and permanent magnets a corresponding to the permanent magnets B one to one are respectively fixed to both sides of the nut seat.
In another aspect of the present invention, the screw supporting portion includes a supporting frame, two rollers are rotatably fixed on the supporting frame, the axes of the two rollers are respectively parallel to the axis of the screw, a gap is provided between the surfaces of the two rollers, and the two rollers are jointly supported at the lower portion of the screw.
In another aspect of the invention, one linear guide is located below the front of the lead screw and the other linear guide is located below the rear of the lead screw.
In another aspect of the invention, the two stops are located below one-third of the travel of the lead screw nut and below two-thirds of the travel of the lead screw nut, respectively.
In another aspect of the invention, a cushion pad is fixed to an end of the stopper facing the slider.
The invention has the beneficial effects that: the sliding block and the nut seat in the magnetic force follow-up ball screw supporting device of the gantry machining center are connected by the magnetic force of the permanent magnet, other connecting parts do not need to be used for rigid connection between two supporting points of the supporting screw during operation, the problems of large deflection deformation and serious bending deformation of the connecting parts are further avoided, the installation space is saved, the two supporting points independently operate, the impact on a screw is small, the requirement on assembly precision is greatly reduced, and the installation and debugging are convenient.
Description of the drawings:
fig. 1 is a schematic perspective view of embodiment 1 of the present invention.
Fig. 2 is a partially enlarged view of the slider shown in fig. 1.
In the drawings: 1. the device comprises a linear guide rail, 2, a sliding block, 3, a wear-resistant block, 4, a lead screw, 5, a lead screw nut, 6, a nut seat, 7, a servo motor, 8, a machine tool body, 9, permanent magnets A and 10, a stop block, 11 and a permanent magnet B.
The specific implementation mode is as follows:
the following describes the embodiments of the present invention with reference to the drawings and examples:
in the description of the present invention, it is to be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A magnetic servo ball screw supporting device of a gantry machining center comprises two linear guide rails 1 which are parallel to a screw 4 and arranged below the screw 4, the linear guide rails 1 are respectively matched with sliding blocks 2 capable of sliding along the linear guide rails 1, the opposite ends of the two linear guide rails 1 are respectively fixed with a stop block 10 for stopping the sliding of the sliding blocks 2 through bolts, the stop blocks 10 can also be fixed on a machine tool body 8 through bolts, a screw supporting part for supporting a screw 4 is fixed on the slide block 2 through a bolt, a nut seat 6 is fixed on a screw nut 5 through a bolt or welding, the nut seat 6 is fixed with a permanent magnet A9 through a bolt, the nut seat 6 is positioned between the two sliders 2, the two sliders 2 are respectively fixed with a permanent magnet B11 through a bolt, when the nut seat 6 moves above the slider 2, the heteropolar poles of the permanent magnet A9 and the permanent magnet B11 are opposite, and the slider 2 is driven to move through adsorption. The lead screw supporting part comprises a wear-resistant block 3, the wear-resistant block 3 is fixed to the upper end of the sliding block 2 through a bolt, a groove with a semicircular section is formed in the upper end of the wear-resistant block 3, the groove is supported on the lower portion of the lead screw, the wear-resistant block 3 can be made of wear-resistant materials, and wear-resistant copper materials are adopted in the embodiment. Permanent magnets B11 are fixed at two side ends of the wear-resistant block 3 through bolts respectively, and permanent magnets A9 corresponding to the permanent magnets B11 in a one-to-one mode are fixed at two sides of the nut seat 6 through bolts respectively. One linear guide 1 is located below the front of the screw and the other linear guide 1 is located below the rear of the screw. The two stops 10 are located below one third of the travel of the spindle nut 5 and below two thirds of the travel of the spindle nut 5. The dog 10 is fixed with the blotter towards the one end of slider 2, and the blotter can adopt elastic material such as rubber, and the fixed mode can adopt connection modes such as joint, bonding, bolt.
When the screw driver is used, the screw rotates at a high speed, the screw nut 5 and the nut seat 6 are driven to move linearly along the screw, and when the nut seat 6 moves forwards from the middle to a position above the stop block 10, the permanent magnet A9 and the permanent magnet B11 are adsorbed together, so that the sliding block 2 moves forwards along with the nut seat 6. When the nut seat 6 runs reversely, the sliding block 2 runs reversely along with the nut seat 6 due to the adsorption of the permanent magnet A9 and the permanent magnet B11, when the nut seat 6 runs reversely to a position above the stop block 10, the sliding block 2 is stopped by the stop block 10 and then separated from the nut seat 6, and stops at the stop block 10, and the wear-resistant block 3 on the sliding block 2 plays a role in supporting the lead screw at one third of the length of the lead screw. The nut seat 6 continues to run reversely, and then passes over the position above the second stop block 10, and the wear-resistant block 3 on the second sliding block 2 plays a role in supporting the lead screw at two thirds of the length of the lead screw according to the principle. The two supports effectively restrain the natural droop of the screw rod.
The sliding block 2 and the nut seat 6 in the magnetic force follow-up ball screw supporting device of the gantry machining center are connected by the magnetic force of the permanent magnet, and other connecting parts do not need to be used for rigid connection between two supporting points of the supporting screw during operation, so that the problems of large deflection deformation and serious bending deformation of the connecting parts are avoided, the installation space is saved, the two supporting points respectively operate independently, the impact on a screw is small, the requirement on the assembly precision is greatly reduced, and the installation and debugging are convenient;
the magnetic servo ball screw supporting device for the gantry machining center is simple in structure, light in weight and small in impact on a screw, can achieve the full-stroke supporting effect of the screw, and improves the running precision of the screw. The magnetic servo ball screw supporting device for the gantry machining center is particularly suitable for high-speed operation of a machine tool, guarantees the precision requirement of the machine tool during high-speed operation, and is high in reliability.
Example 2
The difference between the embodiment 2 and the embodiment 1 lies in the structure of the screw supporting part, in the embodiment 2, the screw supporting part includes a supporting frame, two rollers are rotatably fixed on the supporting frame, the axial leads of the two rollers are respectively parallel to the axial lead of the screw, a gap is provided between the surfaces of the two rollers, and the two rollers are supported at the lower part of the screw together. When the lead screw is rotated, the two idler wheels supported at the lower part of the lead screw on the support frame rotate along with the lead screw, so that the friction between the two idler wheels and the lead screw is reduced, and the abrasion is reduced.
The specific technical scheme of the embodiment 2 is as follows:
the utility model provides a longmen machining center magnetic force follow-up ball screw strutting arrangement, includes and is parallel to the lead screw and locates two linear guide below the lead screw, the last cooperation of linear guide has respectively can follow the gliding slider of linear guide, and the relative one end of two linear guide is fixed with the gliding dog that blocks the slider through the bolt respectively, and the dog also can be fixed on the lathe bed through the bolt, be fixed with the lead screw supporting part that supports the lead screw through the bolt on the slider, be fixed with the nut seat through bolt or welded fastening on the lead screw nut, be fixed with permanent magnet A through the bolt on the nut seat, the nut seat is located between two sliders, is fixed with permanent magnet B through the bolt on two sliders respectively, permanent magnet A and permanent magnet B heteropolarity are relative when the nut seat moves to the slider top, and then drive the slider through. The lead screw supporting part comprises a supporting frame, two idler wheels are rotationally fixed on the supporting frame, the axial leads of the two idler wheels are respectively parallel to the axial lead of the lead screw, a space is arranged between the wheel surfaces of the two idler wheels, and the two idler wheels are jointly supported on the lower portion of the lead screw. One linear guide rail is positioned below the front part of the screw rod, and the other linear guide rail is positioned below the rear part of the screw rod. The two stop blocks are respectively positioned below one third of the travel of the screw nut and below two thirds of the travel of the screw nut. The dog is fixed with the blotter towards the one end of slider, and the blotter can adopt elastic material such as rubber, and fixed mode can adopt connection modes such as joint, bonding, bolt.
When the screw rod is used, the screw rod rotates at a high speed, the screw rod nut and the nut seat are further driven to move linearly along the screw rod, when the nut seat moves forwards from the middle to a position above the stop block, the permanent magnet A and the permanent magnet B are adsorbed together, and the sliding block moves forwards along with the nut seat. When the nut seat reversely runs, the sliding block reversely runs along with the nut seat due to the adsorption of the permanent magnet A and the permanent magnet B, when the nut seat reversely runs to the position above the stop block, the sliding block is stopped by the stop block and further separated from the nut seat, and stops at the stop block, and the wear-resistant block on the sliding block plays a supporting role on the screw rod at one third of the length of the screw rod. The nut seat continues to run reversely, then passes through the position above the second stop block, the principle is the same as the principle, and the wear-resistant block on the second sliding block plays a supporting role for the lead screw at the two thirds of the length of the lead screw. The two supports effectively restrain the natural droop of the screw rod.
The sliding block and the nut seat in the magnetic force follow-up ball screw supporting device of the gantry machining center are connected by the magnetic force of the permanent magnet, and other connecting parts do not need to be used for rigid connection between two supporting points of the supporting screw during operation, so that the problems of large deflection deformation and serious bending deformation of the connecting parts are avoided, the installation space is saved, the two supporting points respectively operate independently, the impact on a screw is small, the requirement on the assembly precision is greatly reduced, and the installation and debugging are convenient;
the magnetic servo ball screw supporting device for the gantry machining center is simple in structure, light in weight and small in impact on a screw, can achieve the full-stroke supporting effect of the screw, and improves the running precision of the screw. The magnetic servo ball screw supporting device for the gantry machining center is particularly suitable for high-speed operation of a machine tool, guarantees the precision requirement of the machine tool during high-speed operation, and is high in reliability.
In summary, the above-mentioned embodiments are only preferred embodiments of the present invention, and all equivalent changes and modifications made in the claims of the present invention should be covered by the claims of the present invention.
Claims (7)
1. The utility model provides a longmen machining center magnetic force follow-up ball screw strutting arrangement, characterized by includes and is parallel to and locates two linear guide below the lead screw with the lead screw, the last cooperation of linear guide has respectively can follow the gliding slider of linear guide, and the relative one end of two linear guide is fixed with respectively blocks the gliding dog of slider, be fixed with the lead screw supporting part that supports the lead screw on the slider, is fixed with the nut seat on the lead screw nut, be fixed with permanent magnet A on the nut seat, the nut seat is located between two sliders, is fixed with permanent magnet B on two sliders respectively, permanent magnet A is opposite with permanent magnet B heteropolarity when the nut seat moves to the slider top.
2. The magnetic force follow-up ball screw support device of the gantry machining center according to claim 1, wherein the screw support portion comprises a wear-resistant block, the wear-resistant block is fixed at the upper end of the sliding block, a groove with a semicircular section is formed in the upper end of the wear-resistant block, and the groove is supported at the lower portion of the screw.
3. The magnetic force follow-up ball screw support device of the gantry machining center according to claim 2, wherein permanent magnets B are respectively fixed to two side ends of the wear-resistant block, and permanent magnets A corresponding to the permanent magnets B in a one-to-one mode are respectively fixed to two sides of the nut seat.
4. The magnetic force follow-up ball screw support device of the gantry machining center according to claim 1, wherein the screw support part comprises a support frame, two rollers are rotatably fixed on the support frame, the axial leads of the two rollers are respectively parallel to the axial lead of the screw, a gap is formed between the wheel surfaces of the two rollers, and the two rollers are jointly supported at the lower part of the screw.
5. The magnetic force follow-up ball screw support device of gantry machining center of claim 1, wherein one linear guide is located below the front portion of the screw and the other linear guide is located below the rear portion of the screw.
6. The magnetic force follow-up ball screw support device of the gantry machining center according to any one of claims 1 to 5, wherein the two stoppers are respectively positioned below one third of the travel of the screw nut and below two thirds of the travel of the screw nut.
7. The magnetic force follow-up ball screw support device of gantry machining center of claim 6, wherein a cushion pad is fixed on one end of the stopper facing the slide block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010695760.4A CN111761397A (en) | 2020-07-20 | 2020-07-20 | Magnetic servo ball screw supporting device of gantry machining center |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010695760.4A CN111761397A (en) | 2020-07-20 | 2020-07-20 | Magnetic servo ball screw supporting device of gantry machining center |
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| CN111761397A true CN111761397A (en) | 2020-10-13 |
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| CN202010695760.4A Pending CN111761397A (en) | 2020-07-20 | 2020-07-20 | Magnetic servo ball screw supporting device of gantry machining center |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894567A (en) * | 2021-10-25 | 2022-01-07 | 东莞市宝科精密机械有限公司 | High-precision gantry machining equipment |
| CN114161199A (en) * | 2021-12-23 | 2022-03-11 | 樟树市易正机械有限公司 | Roller screw pair for gantry numerical control machine tool |
-
2020
- 2020-07-20 CN CN202010695760.4A patent/CN111761397A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113894567A (en) * | 2021-10-25 | 2022-01-07 | 东莞市宝科精密机械有限公司 | High-precision gantry machining equipment |
| CN114161199A (en) * | 2021-12-23 | 2022-03-11 | 樟树市易正机械有限公司 | Roller screw pair for gantry numerical control machine tool |
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