CN1843700A - Digital controlled grinding (milling) head for cutter semi-diameter compensation employing dual-axial polar coordinate - Google Patents
Digital controlled grinding (milling) head for cutter semi-diameter compensation employing dual-axial polar coordinate Download PDFInfo
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- CN1843700A CN1843700A CN 200610081471 CN200610081471A CN1843700A CN 1843700 A CN1843700 A CN 1843700A CN 200610081471 CN200610081471 CN 200610081471 CN 200610081471 A CN200610081471 A CN 200610081471A CN 1843700 A CN1843700 A CN 1843700A
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- eccentric bushing
- cutter
- bearing
- milling
- head
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Abstract
The invention discloses a radius compensated milling head used in double axle polar coordinate digital control knife, which is characterized in that: the electric main axle (1) via outer circumference is mounted inside the hole of inner eccentric sheath (2); the flange disc of electric main axle (1) and the end surface of eccentric sheath (2) via bolts are rigidly connected; the outer circumference of inner eccentric sheath () is mounted in the holes of couple rolling bearing (3); the outer ring of rolling bearing (3) is matched with the inner hole of outer eccentric sheath (4); the inner and outer eccentric sheathes (2, 4) are axially positioned via bolt and bearing end cover; the outer sheath (5) is connected to the machine tool. The invention uses two alternative-current servo motors, to independently control the radius compensated amount e and the knife auxiliary angle beta, to realize continuous and stable operation in the process of grinding or milling curve enveloped surface. To some curve enveloped surface, it can realize on-line shape repair. The invention has simple structure and lower cost which is 1/4 of present German planet milling head.
Description
Technical field
The present invention relates to two AC servo motors of a kind of usefulness, the polar coordinates cutter of controlling the cutter benefit amount of process tool and cutter spacing angle respectively by two independent parameter α, β is added frock and is put.It is mainly used in cutter radius compensation to revolving body envelope of curve face processing with bistrique or Milling head, especially can realize the big poor cutter radius compensation in cutter footpath.By suitable control to this bistrique or Milling head, can realize best cutter radius compensation, obtain high surface machining accuracy.Only just can control cutter benefit amount with an independent parameter, for the workpiece that needs curved surface is carried out correction of the flank shape in the processing, for example arc surfaced indexing cam need not be revised procedure, just can realize the online correction of the flank shape of revolving body envelope of curve face processing.
Background technology
At present, the Cutter Radius Compensation Method of the envelope of curve face of using aborning has two kinds: a kind of is to carry out cutter radius compensation with planet grinding head; Another kind is to carry out the cutter spacing compensation with the interlock of two rectangular co-ordinates in cutter is mended the plane.
The former, advantage is the working (machining) efficiency height, the both sides of the flute profile of grinding simultaneously workpiece.Shortcoming is that processing is discontinuous, needs revolution at a high speed, and cutter benefit amount is little, complex structure and price height.
Latter's advantage is that processing is continuous, and cutter benefit amount is big.Not enough is, no matter is the cutter benefit amount or the variation at cutter spacing angle, all can not control separately with an independent parameter, and all the displacement interlock of two reference axis must being mended by the control cutter could realize.Therefore, cutter benefit amount and cutter spacing angle must provide in procedure, can not be online in the process make amendment, this relation is unfavorable for the correction of the flank shape work of some workpiece (for example arc surfaced indexing cam).
The state-of-the-art in the world bistrique that is used for revolving body envelope of curve face cutter radius compensation is the planet grinding head (see figure 1) of German KOPP company, it is to realize cutter radius compensation by the autobiography of emery wheel and revolution, just poor with the cutter footpath is the radius Δ R of emery wheel revolution, makes the rotation radius R of emery wheel and the radius Δ R sum of revolution equal desirable grinding wheel radius R
T(R
T=R+ Δ R).Add man-hour, bistrique center O point moves along desirable emery wheel centrode ∑ 1, and in the revolution in each week of emery wheel, it all can leave finished surface S
2Once, enter finished surface again once, therefore, formed periodic chip breaking cutting, make that processing is discontinuous, and between adjacent twice cutting (as the K of Fig. 1
1And K
2Between the point) form a processing part of owing to cut, in order to reduce to owe to cut the area of part, obtain high machining accuracy, planet grinding head needs revolution at a high speed, makes adjacent 2 K
1And K
2The distance of point reduces as much as possible, and the speed of its revolution is 2000-5000 rev/min, and this has just increased manufacture difficulty, improves manufacturing cost.Because the speed that the worker changes is very high, if cutter benefit amount is very big, will produce bigger periodicity inertia force, make bistrique produce vibration, limited its machete complementary energy power greatly, the machete benefit amount of KOPP company planet grinding head only is 1mm for this reason.The shortcoming of being not difficult to find out planet grinding head from above-mentioned analysis is: process discontinuously, having at a high speed revolution that periodically inertia force is arranged, in order to cause vibration.Machete benefit amount is little, can not be used for the poor cutter in machete footpath and mend complex structure, production cost height.
Summary of the invention
Discontinuous in order to overcome planet grinding head, need revolution at a high speed, cutter benefit amount is little, the shortcoming that complex structure and price are high, and overcome the rectangular co-ordinate cutter and mend the deficiency independently to control cutter benefit amount and cutter supplementary angle, the invention provides a kind of diaxon polar-coordinate digital-control cutter radius compensation with bistrique or Milling head, this invention is simple in structure, processing continuously, do not need revolution, the independent corner parameter of utilizing two AC servo motors to pass through is controlled required cutter benefit amount e and cutter spacing angle β in the processing of envelope of curve face respectively, reach and realize that cutter benefit amount is big, the precision height can be realized two coordinate numerical control bistriques of online correction of the flank shape.
The technical solution adopted for the present invention to solve the technical problems is: emery wheel is installed on the electric main shaft 1, the electricity main shaft 1 with the cylindrical location and installation in the hole of interior eccentric bushing 2, being linked together of the end face rigidity of blue dish of the method for electric main shaft 1 and eccentric bushing 2, the cylindrical of interior eccentric bushing 2 and the eccentric throw of endoporus are e with bolt
1, e
1Value according to the different application occasion of bistrique, the cylindrical of interior eccentric bushing 2 is installed in the hole of a pair of rolling bearing 3, the outer shroud of rolling bearing 3 cooperates with the endoporus of outer eccentric bushing 4, and gives interior eccentric bushing 2 and outer eccentric bushing 4 axial location with bolt and bearing (ball) cover.
The endoporus of outer eccentric bushing 4 and the offset of cylindrical are e
2, and e
2=e
1, e
1Span can be between 5mm～40mm according to the needs of producing.
Therefore, AC servo motor 12 is to control cutter benefit amount e's by the size that changes independent parameter cutter supplementary angle α.Its this characteristic just makes the online correction of the flank shape of some envelope of curve face of realization that its can be online.Because the poor value in cutter footpath depends on the actual size of the preceding cutter of processing, so before the processing, cutter benefit amount e is just given by parameter alpha by motor 12, in the process, motor 12 is not worked generally speaking.Therefore, it does not participate in the interlock of lathe.
Outer eccentric bushing 4 is installed in the endoporus of rolling bearing 6, and the outer shroud of rolling bearing 6 is installed in the endoporus of bistrique overcoat 5, and gives outer eccentric bushing 4 and bistrique overcoat 5 axial location with bolt and bearing (ball) cover.
AC servo motor 7 is by cog belt 10, belt wheel 9 and 11, driving outer eccentric bushing 4 makes it rotate around the axes O of bistrique overcoat 5, the polar angle β in control cutter axle center, polar angle β also is called the cutter spacing angle, and the cutter spacing angle β in diverse location need be obtained by mesh equation with space meshing theory.By overcoat 5 bistrique is connected on the position of needs of lathe.
From the mode that the control cutter is mended, this patent bistrique is a polar-coordinate digital-control cutter spacing compensation arrangement of controlling cutter benefit amount and cutter supplementary angle with two independent parameter respectively.Common cutter spacing compensation, it all is to be controlled simultaneously by two relevant cartesian component that cutter benefit amount is put with the cutter cover, is referred to as the compensation of rectangular co-ordinate cutter spacing.The polar coordinates cutter is mended than rectangular co-ordinate cutter and is mended some new cuttves benefit processes of easier realization, and the online correction of the flank shape of energy, and the programming that control and cutter are mended is all simple.The difference of this patent bistrique and planet grinding head be the cutter added time it does not need at a high speed revolution, processing steadily, continuously, cutter benefit amount is big.
Cutter benefit amount e value poor before processing according to cutter footpath, given by servomotor 12 controls, generally speaking, in the process, do not need to change, when having only online correction of the flank shape, just change by servomotor 12 controls.
The invention has the beneficial effects as follows: this invention is controlled cutter radius compensation amount e and cutter supplementary angle β respectively with two AC servo motors.In the grinding of envelope of curve face or Milling sharpener are made amends for one's faults journey, can realize that processing continuously, steadily, does not need revolution, cutter benefit amount is big, the machining accuracy height.Some is needed the envelope of curve face of correction of the flank shape, can realize online correction of the flank shape, in industrial production, have wide practical use.Compare with present rectangular co-ordinate cutter benefit, be more convenient for realizing new different cutter compensating method.The present invention is simple in structure, and price is low, only is about 1/4 of German planet grinding head price.
Description of drawings
Fig. 1 is a planet grinding schematic diagram;
Fig. 2 repays mill (Milling) head mechanism sketch for diaxon polar coordinates cutter;
Fig. 3 is the fundamental diagram that diaxon polar coordinates cutter is mended mill (Milling) head;
Fig. 4 is that diaxon polar-coordinate digital-control cutter is mended the structure chart with mill (Milling) head.
In Fig. 4,1. electric main shaft, 2. interior eccentric bushing, 3. rolling bearing, 4. outer eccentric bushing, 5. bistrique overcoat, 6. rolling bearing, 7. AC servo motor, 8. bearing, 9. small pulley, 10. cog belt, 11. big belt wheels, 12. AC servo motor, 13. bearings, 14 small pulleys, 15. cog belt, 16. big belt wheels, 17. emery wheels.
The specific embodiment
Emery wheel is installed in (see figure 4) on the electric main shaft 1, and electric main shaft 1 is installed in the endoporus of eccentric bushing 2, and connects with the screw of screw with electric main shaft 1 and eccentric bushing 2 end faces.The center line of interior eccentric bushing 2 cylindricals is O
1, the center line of interior eccentric bushing 2 endoporus is O
2
The endoporus of interior eccentric bushing 2 and the eccentric throw of cylindrical are e
1, the eccentric throw of outer eccentric bushing 4 endoporus and cylindrical is e
2, for the value e that makes cutter benefit amount can be at 0≤e≤2e
1The interval variation got e
1=e
2, e
1Value can determine according to the machete benefit amount of producing needs.
Between interior eccentric bushing 2 and the outer eccentric bushing 4, and between outer eccentric bushing 4 and the sleeve 5, all reduce diaxon frictional force and the mutual axial location of realization in relative rotation with rolling bearing.The length of interior eccentric bushing 2, outer eccentric bushing 4 and sleeve 5 can be come given according to different production application occasions.
In order to control emery wheel axle center O
2Distance to axle center O, just control cutter benefit amount e, eccentric bushing 2 in AC servo motor 12 drives by the big belt wheel 16 on the interior eccentric bushing 2 of being cemented in of small pulley 14, cog belt 15 and rigidity makes its externally eccentric bushing 4 motion mutually, has realized using the control of independent parameter α tool setting benefit amount e.
AC servo motor 7 drives outer eccentric bushing 4 and rotates relative to jacket casing 5 by the big belt wheel 11 on the outermost sleeve 5 of bistrique of being cemented in of small pulley 9, cog belt 10 and rigidity, has realized with the control of digital quantity tool setting according to position β.
During Milling Process, on the electric main shaft 1 milling cutter is installed.In order to control milling head axle center O
2Distance to axle center O, just control cutter benefit amount e, eccentric bushing 2 in AC servo motor 12 drives by the big belt wheel 16 on the interior eccentric bushing 2 of being cemented in of small pulley 14, cog belt 15 and rigidity makes its externally eccentric bushing 4 motion mutually, has realized using the control of independent parameter α tool setting benefit amount e.
Claims (3)
1. a diaxon polar-coordinate digital-control cutter radius compensation is with grinding (milling) head, it is characterized in that: emery wheel (17) is installed on the electric main shaft (1), the electricity main shaft (1) with the cylindrical location and installation in the hole of interior eccentric bushing (2), with bolt being linked together the end face rigidity of blue dish of the method for electric main shaft (1) and interior eccentric bushing (2), the cylindrical of interior eccentric bushing (2) is installed in the endoporus of a pair of rolling bearing (3), the outer shroud of rolling bearing (3) cooperates with the endoporus of outer eccentric bushing (4), and with bolt and bearing (ball) cover the axial location of interior eccentric bushing (2) and outer eccentric bushing (4) is located; AC servo motor (12) is installed on the bearing (13), bearing 13 usefulness bolts and alignment pin are installed on the plane that is lower than cylindrical of outer eccentric bushing (4), and the belt wheel (14) on AC servo motor (12) axle is meshed by the belt wheel (16) of cog belt (15) with fixing interior eccentric bushing (2); Outer eccentric bushing (4) is installed in the endoporus of rolling bearing (6), and the outer shroud of rolling bearing (6) is installed in the endoporus of bistrique overcoat (5), and with bolt and bearing (ball) cover with outer eccentric bushing (4) and bistrique overcoat (5) axial location; AC servo motor (7) is installed on the bearing (8), bearing (8) is installed on the plane of bistrique overcoat (5) cylindrical with bolt and alignment pin, belt wheel (9) on AC servo motor (7) axle is meshed by the belt wheel (11) of cog belt (10) with fixing outer eccentric bushing (4), and bistrique overcoat (5) connects with lathe.
2. diaxon polar-coordinate digital-control cutter radius compensation according to claim 1 is with grinding (Milling) head, and it is characterized in that: the interior eccentric bushing (2) and the endoporus of outer eccentric bushing (4) and the eccentric throw of cylindrical are respectively e
1, e
2, and e
2=e
1, e
1Span be 5mm～40mm.
3. diaxon polar-coordinate digital-control cutter radius compensation according to claim 1 and 2 is characterized in that with grinding (Milling) head: AC servo motor (12,7) also can train drive inside and outside eccentric bushing (2,4) rotation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100814715A CN100488728C (en) | 2006-05-22 | 2006-05-22 | Digital controlled grinding (milling) head for cutter semi-diameter compensation employing dual-axial polar coordinate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100814715A CN100488728C (en) | 2006-05-22 | 2006-05-22 | Digital controlled grinding (milling) head for cutter semi-diameter compensation employing dual-axial polar coordinate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1843700A true CN1843700A (en) | 2006-10-11 |
| CN100488728C CN100488728C (en) | 2009-05-20 |
Family
ID=37062685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100814715A Expired - Fee Related CN100488728C (en) | 2006-05-22 | 2006-05-22 | Digital controlled grinding (milling) head for cutter semi-diameter compensation employing dual-axial polar coordinate |
Country Status (1)
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|---|---|
| CN (1) | CN100488728C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084852A (en) * | 2014-07-03 | 2014-10-08 | 谭明 | Grinding stone device with grinding stone height automatic compensation function |
| CN109333132A (en) * | 2018-10-19 | 2019-02-15 | 张二朋 | Eccentric structure electro spindle, and preparation method thereof and installation method |
| CN110039411A (en) * | 2019-04-24 | 2019-07-23 | 燕山大学 | The auxiliary device of arc surface grinding, polishing is carried out on plane polished machine to workpiece |
| CN113878180A (en) * | 2021-09-16 | 2022-01-04 | 重庆首业齿轮研究院有限公司 | Seven-shaft four-linkage multifunctional gear grinding machine |
-
2006
- 2006-05-22 CN CNB2006100814715A patent/CN100488728C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104084852A (en) * | 2014-07-03 | 2014-10-08 | 谭明 | Grinding stone device with grinding stone height automatic compensation function |
| CN109333132A (en) * | 2018-10-19 | 2019-02-15 | 张二朋 | Eccentric structure electro spindle, and preparation method thereof and installation method |
| CN110039411A (en) * | 2019-04-24 | 2019-07-23 | 燕山大学 | The auxiliary device of arc surface grinding, polishing is carried out on plane polished machine to workpiece |
| CN113878180A (en) * | 2021-09-16 | 2022-01-04 | 重庆首业齿轮研究院有限公司 | Seven-shaft four-linkage multifunctional gear grinding machine |
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| Publication number | Publication date |
|---|---|
| CN100488728C (en) | 2009-05-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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Granted publication date: 20090520 Termination date: 20120522 |