CN202317872U - Double compensation device for ram motion and inclination of CNC (computerized numerical control) floor-type boring and milling machine - Google Patents
Double compensation device for ram motion and inclination of CNC (computerized numerical control) floor-type boring and milling machine Download PDFInfo
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- CN202317872U CN202317872U CN2011203978889U CN201120397888U CN202317872U CN 202317872 U CN202317872 U CN 202317872U CN 2011203978889 U CN2011203978889 U CN 2011203978889U CN 201120397888 U CN201120397888 U CN 201120397888U CN 202317872 U CN202317872 U CN 202317872U
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Abstract
The utility model discloses a double compensation device for the ram motion and inclination of a CNC (computerized numerical control) floor-type boring and milling machine. The double compensation device comprises a spindle-box inclination compensation mechanism and a ram deformation compensation mechanism, wherein the spindle-box inclination compensation mechanism comprises a compensating hydraulic cylinder, a first fixed pulley, a second fixed pulley and a steel wire rope, wherein the compensating hydraulic cylinder is arranged on one side of the upper end face of a spindle box; the first fixed pulley is arranged at the top of a stand column on the compensating hydraulic cylinder side, and the second fixed pulley is diagonally arranged ah the top of the stand column; one end of the steel wire rope is connected with a piston rod of the compensating hydraulic cylinder, and the other end of the steel wire rope is connected to the side face of the stand column after bypassing the two fixed pulleys; the ram deformation compensation mechanism comprises two draw bars, two cylinder sets and a programmable logic controller, wherein the two draw bars are arranged on the two sides of the upper part of the inside of a ram, one ends of the draw bars are arranged in a hole at the front end of the ram, and the other ends of the draw bars are fixed at the rear end of the inside of the ram by locking nuts; each cylinder set comprises at least two compensating cylinders, the two compensating cylinders are connected in series at the rear end of the ram, and a piston is connected with the draw bars; and according to detected values of a position detection unit, through calculation, the programmable logic controller transmits control signals to an electro-hydraulic proportional valve so as to control on the compensating hydraulic cylinder and compensating cylinders.
Description
Technical field
The utility model relates to Digit Control Machine Tool, the dual compensation arrangement that particularly a kind of numerical control floor type boring and milling machine ram is movable inclined.
Background technology
Along with the continuous development of modern manufacturing industry, importance accurate and Ultraprecision Machining highlights day by day.Digit Control Machine Tool has also faced the opportunities and challenges of New Times as manufacturing important equipment.The precision that improves Digit Control Machine Tool is the key point that improves the Digit Control Machine Tool product quality, enhances one's market competitiveness.
The topmost architectural feature of floor-type milling & boring machine is to adopt cantilevered ram workpiece.Be in the state of overhanging during ram work, and impulse stroke is big more, its maximum amount of overhanging is also big more.Because the weight factor of annexes such as ram self and main shaft thereof, ram will inevitably produce deflection deformation in the process of stretching out, cause the angular error and the displacement error of machine tool chief axis and cutter, thereby influences the machining accuracy of lathe.Therefore must take the suitable compensation measure to ram bending deformation, to guarantee the machining accuracy of whole lathe.
Existing compensation method has:
1. main spindle box center bit shift compensation changes length of steel wire rope through oil cylinder, and position of centre of gravity is raise in vertical plane.
2. ram is deformation-compensated, through two symmetrical oil cylinders tension above the ram, increases ram rigidity through active force, and the trend that ram is had be straightened reduces the ram bending deformation amount.
3. installation accessories compensation is provided with oil pocket in the ram bottom, increases its pressure, raises ram, plays the effect of compensation.
4. main spindle box transformation hydraulic cavities compensation; Transformer static pressure chamber is set the opposite slightly to the right or left respectively up and down at main spindle box ram gib plate; Be divided into two groups of transformation static pressure chambeies; And link to each other with two groups of hydraulic damping bodies and proportional pressure-reducing valve respectively, the oil pressure that changes transformation static pressure chamber through the control system is realized that the ram front end is raised and is compensated.
The weak point of first three compensation way is, mainly through main spindle box or ram because of the distortion that external force produces compensates, tend to produce excessive and the situation that ram is not compensated of main spindle box distortion, and compensation rate can't control accurately, compensation precision is low.It is wide that the 4th kind of mode has a compensation range than the first three mode, the characteristics that precision is high, but its transformation hydraulic cavities oil pressure control mode is comparatively loaded down with trivial details, is difficult for implementing.
Summary of the invention
The purpose of the utility model is the dual compensation arrangement that a kind of numerical control floor type boring and milling machine ram is movable inclined; Adopt the inner dual compensation of compensation hydraulic mechanism of main spindle box compensation hydraulic mechanism and ram; It is bigger to have compensation range, the characteristics that compensation effect and precision are good.
For achieving the above object, the technical scheme of the utility model is:
The dual compensation arrangement that a kind of numerical control floor type boring and milling machine ram is movable inclined comprises the deformation-compensated mechanism of main spindle box pour angle compensation mechanism and ram; Wherein, main spindle box pour angle compensation mechanism comprises, compensating hydraulic cylinder is arranged at main spindle box upper surface one side that runs on the column guide rail, and promptly with respect to the opposite side of main spindle box suspension centre, this suspension centre is arranged at the main spindle box position of centre of gravity of the state that do not stretch out at main shaft; First, second fixed pulley, wherein, first fixed pulley is arranged at column one side roof part or the top of corresponding compensating hydraulic cylinder side through fixed support, and second fixed pulley is arranged at column top or top with the first fixed pulley diagonal side through fixed support; Assembly pulley is arranged at the column side bottom of corresponding second fixed pulley; Steel wire rope, an end is connected in the piston rod end of compensating hydraulic cylinder, and the other end walks around first, second fixed pulley and slide is connected on the column side; The deformation-compensated mechanism of ram comprises, two pull bars are arranged at ram internal upper part both sides respectively, and pull bar one end is positioned at the ram front aperture, and the other end is fixed in the inner rear end of ram through locking nut; Two oil cylinder groups, respectively corresponding two pull bars, at least two compensating cylinders of each oil cylinder group, two compensating cylinder series connection are arranged at the ram rearward end that pull bar stretches out, and cylinder body is connected in ram, and oil cylinder piston is sheathed on pull bar, and is connected with pull bar; Some electro-hydraulic proportional valves are arranged at the control oil circuit of above-mentioned compensating hydraulic cylinder and compensating cylinder respectively, and are electrically connected through amplifier and digital control system programmable logic controller (PLC); The position detecting element of the sagging deflection of front end connected the numerical control system control unit when one detection ram stretched out; The detected value of this position detecting element is sent to electro-hydraulic proportional valve with control signal through the electron-amplifier amplification through programmable logic controller (PLC) calculating compensating hydraulic cylinder and oil cylinder group is controlled.
Further, each oil cylinder group is established three compensating cylinders in the deformation-compensated mechanism of described ram, and series connection is arranged at the ram rearward end of back end of tie rod.
Described position detecting element adopts the grating chi.
When ram was sagging, the compensating cylinder piston moved, and made piston rod elongated (little variable), and pull bar provides a pulling force to ram, and the size of pulling force is linear the increasing of length that stretches out along with ram, compensates the cantilever distortion inaccuracy of ram.
Through establishing compensating hydraulic cylinder on the main spindle box; Through being connected steel wire rope with the compensating hydraulic cylinder piston rod, fixing down through assembly pulley to main spindle box, big or small by digital control system programmable logic controller (PLC) PLC according to the main spindle box inclination angle; Through the control of electro-hydraulic proportional valve, realize the main spindle box pour angle compensation.
The utility model has the advantages that:
1. adopt the inner compensation hydraulic mechanism of main spindle box compensation hydraulic mechanism and ram to combine, avoided main spindle box to be out of shape excessive and situation that ram is not compensated, compensation precision is high, and is effective.
2. adopt the plural serial stage oil cylinder, volume is little, it is big to exert oneself, and several times of the strength of generation are fit to be installed in the small space of ram to the unit oil cylinder.
Description of drawings
Fig. 1 is the structural representation of the utility model one embodiment.
Fig. 2 is the structural representation of ram among the utility model embodiment.
Fig. 3 is the local amplification view of ram among the utility model embodiment.
Fig. 4 is the utility model main spindle box slope compensation hydraulic structure sketch map.
Fig. 5 is the control flow chart of the utility model embodiment.
The specific embodiment
Referring to Fig. 1～Fig. 5, the movable inclined dual compensation arrangement of a kind of numerical control floor type boring and milling machine ram of the utility model comprises main spindle box pour angle compensation mechanism 1 and the deformation-compensated mechanism 2 of ram.
Main spindle box pour angle compensation mechanism 1; Comprise that compensating hydraulic cylinder 11 is arranged at main spindle box 10 upper surfaces one side that runs on column 30 guide rails 40; Promptly with respect to the opposite side of main spindle box suspension centre 101, this suspension centre 101 is arranged at the main spindle box position of centre of gravity of the state that do not stretch out at main shaft; First, second fixed pulley 12,13; Wherein, First fixed pulley 12 is arranged at column 30 1 side roof parts or the top of corresponding compensating hydraulic cylinder 11 sides through fixed support, and second fixed pulley 13 is arranged at column 30 tops or top with first fixed pulley, 12 diagonal side through fixed support; Assembly pulley 14 is arranged at the column side bottom of corresponding second fixed pulley 13; Steel wire rope 15, one ends are connected in the piston rod end of compensating hydraulic cylinder 11, and the other end is walked around first, second fixed pulley 12,13 and assembly pulley 14 is connected on column 30 sides.
The deformation-compensated mechanism 2 of ram comprises, two pull bars 21,21 ' are arranged at ram 20 internal upper part both sides respectively, and pull bar 21,21 ' one end are positioned at ram 20 front aperture, and the other end is fixed in ram 20 inner rear ends through locking nut; Two oil cylinder groups 22,22 '; Respectively corresponding two pull bars 21,21 ', each oil cylinder group are established three compensating cylinders 221,222,223 (with pull bar 21 is example, down together); Series connection is arranged at ram 20 rearward end of pull bar 21 rear ends; Cylinder body is connected in ram 20, and oil cylinder piston is sheathed on pull bar 21, and is connected with pull bar 21.
Electro-hydraulic proportional valve 3,4 is arranged at the control oil circuit of the compensating cylinder 221,222,223 of above-mentioned compensating hydraulic cylinder 11 and oil cylinder group 22 respectively, and is electrically connected with digital control system programmable logic controller (PLC) PLC.
The position detecting element 5 of the sagging deflection of front end when one detection ram 20 stretches out; Connect the numerical control system control unit, programmable logic controller (PLC) PLC is sent to 3,4 pairs of compensating hydraulic cylinders 11 of electro-hydraulic proportional valve and compensating cylinder 221,222,223 is controlled according to the detected value of position detecting element 5 through calculating control signal amplified through amplifier 6.
When ram 20 stretched out forward, its front end had sagging deflection, and position detecting element 5 detects Z axial coordinate value; And offering digital control system programmable logic controller (PLC) PLC, the digital control system programmable logic controller (PLC) calculates bucking voltage according to Z axial coordinate value, and the output bucking voltage; Bucking voltage is amplified through amplifier 6, control electro-hydraulic proportional valve 4, and hydraulic oil connects ram compensating cylinder 221,222,223 rod chambers through oil-out 23; And then the pressure of control compensating cylinder 221,222,223; Hydraulic oil gets into back promotion compensating cylinder piston from oil-in 24 and moves, and makes piston rod elongated (little variable), and pull bar 21 provides a pulling force for ram 20; Produce pulling force through compensating cylinder 221,222,223 and 21 pairs of ram 20 tops of pull bar, make ram 20 produce flexural deformation upwards.
So just can be different according to the length that ram stretches out, the annex of dress is different, and the ram compensating cylinder is adjusted in varying in size of given signal, thereby eliminates the amount of deflection after ram stretches out.
During lathe work, detect the coordinate figure of ram on the Z axle through position detecting element; According to detected coordinate figure, programmable logic controller (PLC) calculates the offset of each sag of chain and gradient, converts this offset into bucking voltage; Compensation voltage signal is amplified through power amplifier; Signal after amplifying is exported to two electro-hydraulic proportional valves, control compensating hydraulic cylinder and compensating cylinder, realize that main spindle box pour angle compensation and ram are deformation-compensated through electro-hydraulic proportional valve.
Owing to adopted said apparatus, solved the problem that causes ram to tilt to can not get compensating because of the main spindle box inclination and distortion, improved compensation precision, finally improved machine tooling quality and efficient greatly, for obtaining good economic benefit, enterprise brought into play important function.
Claims (3)
1. the dual compensation arrangement that the numerical control floor type boring and milling machine ram is movable inclined is characterized in that, comprises the deformation-compensated mechanism of main spindle box pour angle compensation mechanism and ram;
Main spindle box pour angle compensation mechanism comprises,
Compensating hydraulic cylinder is arranged at main spindle box upper surface one side that runs on the column guide rail, and promptly with respect to the opposite side of main spindle box suspension centre, this suspension centre is arranged at the main spindle box position of centre of gravity of the state that do not stretch out at main shaft;
First, second fixed pulley, wherein, first fixed pulley is arranged at column one side roof part or the top of corresponding compensating hydraulic cylinder side through fixed support, and second fixed pulley is arranged at column top or top with the first fixed pulley diagonal side through fixed support; Assembly pulley is arranged at the column side bottom of corresponding second fixed pulley; Steel wire rope, an end is connected in the piston rod end of compensating hydraulic cylinder, and the other end walks around first, second fixed pulley and assembly pulley is connected on the column side;
The deformation-compensated mechanism of ram comprises,
Two pull bars are arranged at ram internal upper part both sides respectively, and pull bar one end is positioned at the ram front aperture, and the other end is fixed in the inner rear end of ram through locking nut;
Two oil cylinder groups, respectively corresponding two pull bars, at least two compensating cylinders of each oil cylinder group, these two compensating cylinder series connection are arranged at the ram rearward end that pull bar stretches out, and cylinder body is connected in ram, and oil cylinder piston is sheathed on pull bar, and is connected with pull bar;
Some electro-hydraulic proportional valves are arranged at the control oil circuit of above-mentioned compensating hydraulic cylinder, compensating cylinder respectively, and are electrically connected through amplifier and then with the digital control system programmable logic controller (PLC);
The position detecting element of the sagging deflection of front end connected the numerical control system control unit when one detection ram stretched out; The detected value of this position detecting element is sent to electro-hydraulic proportional valve with control signal through the amplifier amplification through programmable logic controller (PLC) calculating compensating hydraulic cylinder and oil cylinder group is controlled.
2. the dual compensation arrangement that numerical control floor type boring and milling machine ram as claimed in claim 1 is movable inclined,
It is characterized in that each oil cylinder group is established three compensating cylinders in the deformation-compensated mechanism of described ram,
Series connection is arranged at the ram rearward end of back end of tie rod.
3. the dual compensation arrangement that numerical control floor type boring and milling machine ram as claimed in claim 1 is movable inclined,
It is characterized in that described position detecting element adopts the grating chi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203978889U CN202317872U (en) | 2011-10-19 | 2011-10-19 | Double compensation device for ram motion and inclination of CNC (computerized numerical control) floor-type boring and milling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203978889U CN202317872U (en) | 2011-10-19 | 2011-10-19 | Double compensation device for ram motion and inclination of CNC (computerized numerical control) floor-type boring and milling machine |
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| Publication Number | Publication Date |
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| CN202317872U true CN202317872U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203978889U Withdrawn - After Issue CN202317872U (en) | 2011-10-19 | 2011-10-19 | Double compensation device for ram motion and inclination of CNC (computerized numerical control) floor-type boring and milling machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357842A (en) * | 2011-10-19 | 2012-02-22 | 上海三一精机有限公司 | Double compensation method and device for moving tilt of numerical control floor type boring-milling machine ram |
| CN102806490A (en) * | 2012-08-20 | 2012-12-05 | 青岛辉腾机械设备有限公司 | Gravity center displacement balance device of square ram of main shaft box of floor-type boring and milling machine |
| CN103878645A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Ram overhanging deformation compensation device and method |
| 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 |
| CN115255963A (en) * | 2022-08-19 | 2022-11-01 | 通裕重工股份有限公司 | Ram compensation mechanism of boring and milling machine |
-
2011
- 2011-10-19 CN CN2011203978889U patent/CN202317872U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102357842A (en) * | 2011-10-19 | 2012-02-22 | 上海三一精机有限公司 | Double compensation method and device for moving tilt of numerical control floor type boring-milling machine ram |
| CN102806490A (en) * | 2012-08-20 | 2012-12-05 | 青岛辉腾机械设备有限公司 | Gravity center displacement balance device of square ram of main shaft box of floor-type boring and milling machine |
| CN102806490B (en) * | 2012-08-20 | 2014-05-14 | 青岛辉腾机械设备有限公司 | Gravity center displacement balance device of square ram of main shaft box of floor-type boring and milling machine |
| CN103878645A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Ram overhanging deformation compensation device and method |
| CN103878645B (en) * | 2012-12-20 | 2016-03-16 | 中国科学院沈阳自动化研究所 | A kind of ram overhanging deflection compensation device and method |
| 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 |
| CN115255963A (en) * | 2022-08-19 | 2022-11-01 | 通裕重工股份有限公司 | Ram compensation mechanism of boring and milling machine |
| CN115255963B (en) * | 2022-08-19 | 2023-06-06 | 通裕重工股份有限公司 | Ram compensation mechanism of boring and milling machine |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120711 Effective date of abandoning: 20131127 |
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| RGAV | Abandon patent right to avoid regrant |