CN203993378U - Floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement - Google Patents
Floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement Download PDFInfo
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- CN203993378U CN203993378U CN201420434452.6U CN201420434452U CN203993378U CN 203993378 U CN203993378 U CN 203993378U CN 201420434452 U CN201420434452 U CN 201420434452U CN 203993378 U CN203993378 U CN 203993378U
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- main spindle
- spindle box
- floor
- dynamic equilibrium
- boring machine
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Abstract
The utility model discloses a kind of floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement, comprising the slope compensating device for the heeling condition of main spindle box being carried out to dynamic equilibrium compensation, this slope compensating device comprises the leading screw and the feed screw nut that match, the crane fixing with feed screw nut, be located at the jacking pulley on crane, the fixed block that support is fixedly installed relatively, be stretched in the steel cable on jacking pulley and fixed block, for detection of the force cell of force-bearing situation on steel cable, one end of steel cable is fixedly attached to the upper front end of main spindle box, the other end of steel cable is fixedly attached to the rear end lower of main spindle box, detect the force-bearing situation of steel cable by force cell, control system is immediately rotated and is driven the lifting of jacking pulley according to this force-bearing situation control leading screw, thereby utilize steel cable to the main spindle box power that affords redress, make main spindle box reach dynamic equilibrium, avoid it to occur tilting and affect the wearing and tearing between machining accuracy and aggravation main spindle box and column.
Description
Technical field
The utility model relates to a kind of floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement.
Background technology
Floor-type milling & boring machine can processed complex, large-scale part, is widely used in the Precision Machining field of the industry such as Aeronautics and Astronautics, shipbuilding, and it is day by day bringing into play more and more important effect in modern industry.Floor-type milling & boring machine is a kind of superduty lathe, and on column, the weight of mobile main spindle box reaches more than 10 tons conventionally.Main spindle box drive disk assembly in the process moving up and down is being born the weight of moving component all the time, and this tends to have influence on the stationarity of main spindle box motion, also can produce a very large tilting moment by column, causes the uneven wear of associated components.Therefore,, in order to reduce driving force, must carry out balance to the deadweight of main spindle box.In prior art, normally adopt weight to carry out balance to the deadweight of main spindle box, but, the stressed of column increased again so beyond doubt.
In addition, the weight of making the ram moving horizontally in main spindle box is also very large, ram stretch out or the process of retracting in, and the impact of ram front end installation accessories, will inevitably cause the change of main-shaft box system center of gravity, make main spindle box produce tilt phenomenon, this is also known as the bowing phenomena of main spindle box, the machining accuracy that this can seriously affect lathe, causes the machining accuracy of parts can not be guaranteed.
Summary of the invention
The purpose of this utility model is the shortcoming that overcomes prior art, provides a kind of floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement, to improve the machining accuracy of floor-type milling & boring machine.
For achieving the above object, the technical solution adopted in the utility model is: a kind of floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement, described floor-type milling & boring machine comprises support, be located at regularly the column on described support, be located to oscilaltion the main spindle box on described column, for driving the lift drive mechanism of described main spindle box oscilaltion, described main spindle box comprises the casing that axial line extends along fore-and-aft direction, be located in described casing and can relatively described casing along the ram of its axially-movable, described compensating chain device comprises the slope compensating device for the heeling condition of described main spindle box being carried out to dynamic equilibrium compensation, described slope compensating device comprises the leading screw that axial line vertically distributes and can rotate around Pivot Point Center line, be located at ordinatedly the feed screw nut moving up and down on described leading screw and along with the rotation of described leading screw, the crane fixing with described feed screw nut, for driving the driving mechanism of described leading screw rotation, for controlling the control system of described driving mechanism work, described slope compensating device also comprises the jacking pulley of being located on described crane, the fixed block that relatively described support is fixedly installed, be stretched in the steel cable on described jacking pulley and described fixed block, for detection of the force cell of force-bearing situation on described steel cable, one end of described steel cable is fixedly attached to the upper front end of described main spindle box, the other end of described steel cable is fixedly attached to the rear end lower of described main spindle box, described control system and described force cell signal communication arrange.
Preferably, described compensating chain device also comprises the gravity balance device for the weight of described main spindle box being carried out to dynamic equilibrium, described gravity balance device comprises that cylinder body is fixedly arranged on the balance hydraulic cylinder on described column, described balance hydraulic cylinder is positioned at the top of described main spindle box, the piston rod of described balance hydraulic cylinder and described main spindle box Joint, described gravity balance device also comprises the pressure sensor for detection of hydraulic pressure in the pressure chamber of described balance hydraulic cylinder, for controlling the pilot operated valve device assembly of described balance hydraulic cylinder turnover oil condition, described pressure sensor is communicated with described pilot operated valve device assembly phase signals.
Further preferably, described balance hydraulic cylinder is double acting hydraulic cylinder, the rodless cavity that described pressure chamber is described balance hydraulic cylinder, and fuel tank is connected with the rod chamber of described balance hydraulic cylinder by described pilot operated valve device assembly.
Still more preferably, described pilot operated valve device assembly comprises hydraulic control one-way valve, electrohydraulic servo valve and electro-hydraulic proportional valve, for controlling the controller of described electro-hydraulic proportional valve duty, described electro-hydraulic proportional valve is connected with described fuel tank, described electrohydraulic servo valve is connected between described electro-hydraulic proportional valve and the import of described hydraulic control one-way valve, and the outlet of described hydraulic control one-way valve is connected with the described rod chamber of described balance hydraulic cylinder.
Preferably, described jacking pulley has two groups, and described in two groups, jacking pulley lays respectively at the top of described main spindle box rear and front end, and described fixed block has one group, and described fixed block is positioned at the below of described main spindle box rear end.
Further preferably, described force cell is arranged on the described steel cable between described fixed block and described main spindle box rear end lower.
Preferably, described driving mechanism is servomotor.
Preferably, described control system is the digital control system that described floor-type milling & boring machine carries.
Preferably, described lift drive mechanism is ball screw framework.
Due to the utilization of technique scheme, the utility model compared with prior art has following advantages: floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement of the present utility model, wherein by adopting slope compensating device and gravity balance device, can be effectively in time in main spindle box motion process lasting change balance, reduce the driving force to main spindle box, prevent that the bowing phenomena tilting from appearring in main spindle box in the time that ram stretches out, and improved the overall precision of this floor-type milling & boring machine simultaneously.This compensating chain device adopts the mode of mechanical compensation, can overcome the phenomenon that compensation lags behind, and realizes and fast and accurately main spindle box is carried out to dynamic equilibrium.Also avoided traditional employing counterweight balance mode can increase the stressed defect of column simultaneously, make main spindle box on column when elevating movement wearing and tearing between the two significantly reduce, effectively improved service life and the machining accuracy of lathe.
Brief description of the drawings
The operation principle that accompanying drawing 1 is bascule of the present utility model and mounting structure schematic diagram;
Accompanying drawing 2 is the stressed schematic diagram of ram main-shaft box system in the time of original state in the utility model;
Accompanying drawing 3 is the stressed schematic diagram that in the utility model, ram stretches out main-shaft box system in process;
Wherein: 1, support; 2, column; 3, main spindle box; 31, casing; 32, ram;
4, slope compensating device; 41, servomotor; 42, leading screw; 43, feed screw nut; 44, crane; 45, steel cable; 46, jacking pulley; 47, fixed block; 48, force cell; 49, digital control system;
5, gravity balance device; 51, balance hydraulic cylinder; 52, pressure sensor; 53, hydraulic control one-way valve; 54, electrohydraulic servo valve; 55, electro-hydraulic proportional valve; 56, fuel tank; 57, filter; 58, hydraulic pump;
6, lift drive mechanism (ball screw framework).
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the technical solution of the utility model is further elaborated.
Below in the definition about direction, be all that the direction of conventionally observing according to floor-type milling & boring machine operator when the production and processing defines, what wherein fore-and-aft direction referred to is the flexible direction of ram, that is left and right directions in Fig. 1, wherein left is front, right-hand be after.
Shown in Figure 1, floor-type milling & boring machine comprises support 1, is located at column 2 on support 1 regularly, is located at main spindle box 3 on column 2, lift drive mechanism for 3 oscilaltions of drive shaft case to oscilaltion, above-mentioned lift drive mechanism adopts ball screw framework 6 herein, main spindle box 3 comprises casing 31 that axial line distributes along fore-and-aft direction, be located in casing 31 relatively casing 31 along the ram 32 of its axial stretching, under poised state, the axial line of main spindle box 3 extends along horizontal fore-and-aft direction.Casing 31 refers to the parts except ram 32 in main spindle box 3 total systems herein.
This floor-type milling & boring machine is provided with for main spindle box dynamic equilibrium compensation arrangement, and this compensating chain device comprises the slope compensating device 4 for the heeling condition of main spindle box 3 being carried out to dynamic equilibrium compensation.This slope compensating device 4 comprise that axial line vertically distributes and can be around the leading screw 42 of Pivot Point Center line rotation, be ordinatedly located on leading screw 42 and the feed screw nut 43 that can move up and down along with the rotation of leading screw 42, the crane 44 fixing with feed screw nut 43, for the driving mechanism 41 that drives leading screw 42 to rotate, for controlling the control system 49 of driving mechanism 41 duties, here, what driving mechanism 41 adopted is servomotor, control system 49 adopts digital control system (CNC system), i.e. the self-contained digital control processing control system of digital-control boring-milling machine.In the time that servomotor 41 drives leading screw 42 to rotate, feed screw nut 43 axially moves up and down along leading screw 42, drives crane 44 to move up and down thereupon.
Slope compensating device 4 also comprises the jacking pulley 46 of being located on crane 44, the fixed block 47 that support 1 is fixedly installed relatively, be stretched in the steel cable 45 on jacking pulley 46 and fixed block 47, for detection of the force cell 48 of force-bearing situation on steel cable 45, jacking pulley 46 is provided with two groups, these two groups of jacking pulleys 46 lay respectively at the front end top and top, rear end of main spindle box 3, fixed block 47 has one group, this fixed block 47 is positioned at the below, rear end of main spindle box 3, one end of steel cable 45 is fixedly attached to the upper front end of main spindle box 3, steel cable 45 is walked around two groups of jacking pulleys 46, then winding is on fixed block 47, the other end of steel cable 45 is fixedly attached to the rear end lower of main spindle box 3, force cell 48 is arranged on the steel cable 45 between fixed block 47 and main spindle box 3 rear end lower, this force cell 48 and digital control system 49 signal communication settings.In the time detecting that power value changes on force cell 48, digital control system 49 is obtained the signal that force cell 48 sends and is correspondingly driven leading screw 42 to rotate and make crane 44 rise accordingly or decline, and then carries out balanced compensated to the heeling condition of main spindle box 3.
In main spindle box 3, in the time that ram 32 stretches out the casing 31 of main spindle box 3, can cause the variation of main spindle box 3 entire system centers of gravity, and the pulling force of the steel cable 45 that connects main spindle box 3 is increased, at this moment force cell 48 detects that steel cable 45 upper pulling forces increase, and signal is passed to digital control system 49,49 of digital control systems compare according to predefined pulling force compensated curve and the actual value of thrust detecting, controlling servomotor 41 drives leading screw 42 to rotate, thereby promote jacking pulley 46, make steel cable 45 tensionings provide main spindle box 3 one balancing forces.When in ram 32 retraction casings 31, equally because digital control system 49 is controlled servomotor 41 and reversed, thereby jacking pulley 46 is declined and loosen steel cable 45 and compensate " new line " phenomenon of main spindle box 3.Whole process has completed the real-time dynamic equilibrium that main spindle box 3 is tilted.
On this floor-type milling & boring machine, compensating chain device also comprises the gravity balance device 5 for the weight of main spindle box 3 being carried out to dynamic compensation.This gravity balance device 5 comprises the balance hydraulic cylinder 51 that is positioned at main spindle box 3 tops, this balance hydraulic cylinder 51 is double acting hydraulic cylinder, its cylinder body is fixedly attached on column 2, the external part of its piston rod is fixedly attached on main spindle box 3, this gravity balance device 5 also comprises for detection of the pressure sensor 52 of hydraulic pressure in the pressure chamber of balance hydraulic cylinder 51, passes in and out the pilot operated valve device assembly of oil condition for controlling balance hydraulic cylinder 51, and pressure sensor 52 is communicated with pilot operated valve device assembly phase signals.Here, the pressure chamber that pressure sensor 52 detects is the rodless cavity of balance hydraulic cylinder 51, and fuel tank 56 is connected with the rod chamber of balance hydraulic cylinder 51 by pilot operated valve device assembly.Pilot operated valve device assembly comprises hydraulic control one-way valve 53, electrohydraulic servo valve 54, electro-hydraulic proportional valve 55, and for controlling the controller (not shown) of electro-hydraulic proportional valve 55 duties, electro-hydraulic proportional valve 55 is connected with fuel tank 56, in the time that the valve port of electro-hydraulic proportional valve 55 is opened, oil in fuel tank 56 passes through electro-hydraulic proportional valve 55 under the effect of hydraulic pump 58 after filter 57 filters, and hydraulic pump 58 exports between fuel tank 56 and is also provided with overflow valve 59.Electrohydraulic servo valve 54 is connected between electro-hydraulic proportional valve 55 and the import of hydraulic control one-way valve 53, and the outlet of hydraulic control one-way valve 53 is connected with the rod chamber of balance hydraulic cylinder 51.Herein, electrohydraulic servo valve 54 adopts two-position four-way solenoid directional control valve.
In the time moving upward under the effect of main spindle box 3 at lift drive mechanism, pressure sensor 52 detects the variation of balance hydraulic cylinder 51 interior hydraulic pressures, electromagnet YV2 obtains electric, pressure sensor 52 transmits signals to controller simultaneously, controller makes the valve port of electro-hydraulic proportional valve 55 become large, and oil pressure increases thereupon.Hydraulic oil in fuel tank 56 passes through the right side of electro-hydraulic proportional valve 55 and flows into the rod chamber of balance hydraulic cylinder 51 through hydraulic control one-way valve 53, and oil pressure is increased, and lifting spindle case 3 moves upward, and reduces the driving force of lift drive mechanism simultaneously.In the time that main spindle box 3 moves downward, electromagnet YV1 and YV3 obtain electric, now electrohydraulic servo valve 54 work make hydraulic control one-way valve 53 reverse openings, pressure oil in the rod chamber of balance hydraulic cylinder 51 converges to fuel tank 56 by hydraulic control one-way valve 53 and through electro-hydraulic proportional valve 55 left sides, the piston rod pulling force of balance hydraulic cylinder 51 reduces, and main spindle box 3 is moved downward.
Shown in Fig. 2, Fig. 3, below to main spindle box 3 force-bearing situation under the effect of dynamic equilibrium compensation arrangement analyze, can draw following two groups of equilibrium equations:
Wherein: F
1-lift drive mechanism 6 offers the centripetal force of main spindle box 3;
F
2the pulling force of the balance hydraulic cylinder 51 of-balancing main shaft case gravity;
G
1the gravity of-main spindle box 3 casings 31;
G
2the gravity of-ram 32;
T
1the pulling force of-main spindle box 3 front end steel cables 45;
T
2the pulling force of-main spindle box 3 rear steel ropes 45, T
1and T
2equal and opposite in direction, opposite direction;
T
3and T
4respectively that ram 32 stretches out rear main spindle box 3 rear and front end steel cable 45 pulling force;
T
0the initial tensile force of-steel cable 45;
A-main spindle box 3 centers of gravity are to the distance at the ball-screw center of lift drive mechanism 6;
B-ram 32 centers of gravity are to the distance at the ball-screw center of lift drive mechanism 6;
C-balance hydraulic cylinder 51 piston rod centers are to the distance at the ball-screw center of lift drive mechanism 6;
Distance between d-main spindle box 3 front and back steel cables 45;
The length that s-ram 32 stretches out;
The tension variations that can be obtained steel cable 45 by formula (1), formula (2) is:
So the compensation pulling force of steel cable 45 is:
Draw compensation pull-up curve according to the stroke of ram 32 and deposit in digital control system 49, compare and just can carry out real-time dynamic equilibrium compensation with the actual pulling force recording of main spindle box 3, obtain good counterbalance effect.
To sum up, floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement of the present utility model, wherein by adopting slope compensating device 4 and gravity balance device 5, can be effectively in time in main spindle box 3 motion processes lasting change balance, reduce the driving force to main spindle box 3, prevent that the bowing phenomena tilting from appearring in main spindle box 3 in the time that ram 32 stretches out, and improved the overall precision of this floor-type milling & boring machine simultaneously.This compensating chain device adopts the mode of mechanical compensation, can overcome the phenomenon that compensation lags behind, and realizes and fast and accurately main spindle box 3 is carried out to dynamic equilibrium.Also avoided traditional employing counterweight balance mode can increase the stressed defect of column 2 simultaneously, make main spindle box 3 on column 2 when elevating movement wearing and tearing between the two significantly reduce, effectively improved service life and the machining accuracy of lathe.
Above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (9)
1. a floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement, described floor-type milling & boring machine comprises support, be located at regularly the column on described support, be located to oscilaltion the main spindle box on described column, for driving the lift drive mechanism of described main spindle box oscilaltion, described main spindle box comprises the casing that axial line extends along fore-and-aft direction, be located in described casing and can relatively described casing along the ram of its axially-movable, it is characterized in that: described compensating chain device comprises the slope compensating device for the heeling condition of described main spindle box being carried out to dynamic equilibrium compensation, described slope compensating device comprises the leading screw that axial line vertically distributes and can rotate around Pivot Point Center line, be located at ordinatedly the feed screw nut moving up and down on described leading screw and along with the rotation of described leading screw, the crane fixing with described feed screw nut, for driving the driving mechanism of described leading screw rotation, for controlling the control system of described driving mechanism work, described slope compensating device also comprises the jacking pulley of being located on described crane, the fixed block that relatively described support is fixedly installed, be stretched in the steel cable on described jacking pulley and described fixed block, for detection of the force cell of force-bearing situation on described steel cable, one end of described steel cable is fixedly attached to the upper front end of described main spindle box, the other end of described steel cable is fixedly attached to the rear end lower of described main spindle box, described control system and described force cell signal communication arrange.
2. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 1, it is characterized in that: described compensating chain device also comprises the gravity balance device for the weight of described main spindle box being carried out to dynamic equilibrium, described gravity balance device comprises that cylinder body is fixedly arranged on the balance hydraulic cylinder on described column, described balance hydraulic cylinder is positioned at the top of described main spindle box, the piston rod of described balance hydraulic cylinder and described main spindle box Joint, described gravity balance device also comprises the pressure sensor for detection of hydraulic pressure in the pressure chamber of described balance hydraulic cylinder, for controlling the pilot operated valve device assembly of described balance hydraulic cylinder turnover oil condition, described pressure sensor is communicated with described pilot operated valve device assembly phase signals.
3. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 2, it is characterized in that: described balance hydraulic cylinder is double acting hydraulic cylinder, described pressure chamber is the rodless cavity of described balance hydraulic cylinder, and fuel tank is connected with the rod chamber of described balance hydraulic cylinder by described pilot operated valve device assembly.
4. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 3, it is characterized in that: described pilot operated valve device assembly comprises hydraulic control one-way valve, electrohydraulic servo valve and electro-hydraulic proportional valve, for controlling the controller of described electro-hydraulic proportional valve duty, described electro-hydraulic proportional valve is connected with described fuel tank, described electrohydraulic servo valve is connected between described electro-hydraulic proportional valve and the import of described hydraulic control one-way valve, and the outlet of described hydraulic control one-way valve is connected with the described rod chamber of described balance hydraulic cylinder.
5. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 1, it is characterized in that: described jacking pulley has two groups, described in two groups, jacking pulley lays respectively at the top of described main spindle box rear and front end, described fixed block has one group, and described fixed block is positioned at the below of described main spindle box rear end.
6. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 5, is characterized in that: described force cell is arranged on the described steel cable between described fixed block and described main spindle box rear end lower.
7. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 1, is characterized in that: described driving mechanism is servomotor.
8. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 1, is characterized in that: described control system is the digital control system that described floor-type milling & boring machine carries.
9. floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement according to claim 1, is characterized in that: described lift drive mechanism is ball screw framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434452.6U CN203993378U (en) | 2014-08-04 | 2014-08-04 | Floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434452.6U CN203993378U (en) | 2014-08-04 | 2014-08-04 | Floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement |
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| CN203993378U true CN203993378U (en) | 2014-12-10 |
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| CN201420434452.6U Withdrawn - After Issue CN203993378U (en) | 2014-08-04 | 2014-08-04 | Floor-type milling & boring machine main spindle box dynamic equilibrium compensation arrangement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148988A (en) * | 2014-08-04 | 2014-11-19 | 苏州大学 | Dynamic equilibrium compensating device for spindle box of floor type boring and milling machine |
| CN106312063A (en) * | 2016-08-30 | 2017-01-11 | 西安铂力特激光成形技术有限公司 | Additive manufacturing forming cylinder drive mechanism, forming cylinder and additive manufacturing equipment |
| CN109649897A (en) * | 2018-12-25 | 2019-04-19 | 漳州科晖专用汽车制造有限公司 | A kind of vertical garbage compressor that pressure head can turn on one's side |
-
2014
- 2014-08-04 CN CN201420434452.6U patent/CN203993378U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148988A (en) * | 2014-08-04 | 2014-11-19 | 苏州大学 | Dynamic equilibrium compensating device for spindle box of floor type boring and milling machine |
| CN106312063A (en) * | 2016-08-30 | 2017-01-11 | 西安铂力特激光成形技术有限公司 | Additive manufacturing forming cylinder drive mechanism, forming cylinder and additive manufacturing equipment |
| CN109649897A (en) * | 2018-12-25 | 2019-04-19 | 漳州科晖专用汽车制造有限公司 | A kind of vertical garbage compressor that pressure head can turn on one's side |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141210 Effective date of abandoning: 20160615 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |