CN1063377C - Process and machines for superfine machining convex bus by cutting into-through two step process - Google Patents
Process and machines for superfine machining convex bus by cutting into-through two step process Download PDFInfo
- Publication number
- CN1063377C CN1063377C CN96104405A CN96104405A CN1063377C CN 1063377 C CN1063377 C CN 1063377C CN 96104405 A CN96104405 A CN 96104405A CN 96104405 A CN96104405 A CN 96104405A CN 1063377 C CN1063377 C CN 1063377C
- Authority
- CN
- China
- Prior art keywords
- oilstone
- super
- bus
- smart
- eccentric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The present invention belongs to a technology for superfinishing a ground surface with a conical or cylindrical straight bus into a surface with a convexity bus, and a machine tool. The present invention is particularly suitable for superfinishing crowned raceway of a rolling bearing race, so that stress distribution of the raceway is reasonable when a bearing works, and rotary accuracy and service life are greatly improved. The machine tool is provided with two work spindles and two superfine oscillation mechanisms to realize superfinishing by a two-step method from rough superfinishing to fine superfinishing. Narrow oil stone, the width of which is smaller than 1/2 of the length of a bus of a surface to be processed is used, and the oil stone repeatedly moves in a penetrating form with varying velocity along the direction of the bus to be processed when the superfinishing is carried out by using high-frequency small-amplitude cutting method. Thus, a surface with a convexity bus is effectively and accurately superfinished.
Description
The invention belongs to a kind of brand-new technology and lathe that workpiece to be machined circular cone or the inside and outside surperficial microstoning of cylinder straight edge line is become band convex bus surface.The present invention is specially adapted to the crowned raceway of microstoning circular cone and cylinder roller bearing lasso.
Current home and abroad circular cone or the generally well-known method of cylindrical bearing lasso raceway face microstoning are:
1) it is super smart to utilize a width to be narrower than the wide shape oilstone of surface to be machined bus length, and oilstone vibrates with the reciprocating vibration frequency of＜2000 times/min and the amplitude of 0～4mm along the direction that is parallel to the workpiece bus in process.Meanwhile, oilstone carries out " plunge method " microstoning along the surface of the work of radially pressing to rotation of workpiece.This " plunge method " super essence is the most frequently used Superfinishing machine skill in current home and abroad." plunge method " super Seiko skill and lathe, RM85 type and the RM150 type produced with German THIELENHAUS company are representative.The production such as current Sweden, day, moral, China and the Superfinishing machine overwhelming majority who uses adopt this microstoning principle." plunge method " super Seiko skill and its advantage of lathe are: oilstone is wide, microstoning efficient height.But because inevitably there is cone angle error in tapered roller bearing ring lasso raceway after overground processing, adopt this wide oilstone super smart, the linearity and the cone angle error of super smart back raceway bus are difficult to solve.The zone at raceway bus two ends can't be worked into, and two ends " reveal flower " phenomenon (that is: the wheel grinding vestige decorative pattern after the grinding can't super smart excision totally) often occurs.
2) utilize the narrow oilstone (also can use wide oilstone) of width less than the surface to be machined bus length, adopt at the uniform velocity big toward the small oscillation motion that is added with 0～4mm amplitude, realize that the processing of a circular cone and cylinder roller bearing lasso bus total length is complete, above-mentioned to solve " revealing flower " phenomenon.But adopt this super precision method owing to the oilstone narrower in width, and same block of oilstone should be as thick super, it is super to be used as essence again, so production efficiency is lower.
More than the super smart Processes and apparatus of two classes (seeing Appendix) on the graduate searching document of Ministry of Machine-Building Industry's scientific and technological information all on the books.Super Seiko skill of this two class and lathe can only process the surface with straight edge line, and thisly has the bearing ring of straight edge line raceway face in the bearing products use, bearing ring raceway and rolling element contact area, particularly at the raceway two ends, produce the stress concentration phenomenon, this will cause bearing parts sharply to wear and tear, and reduce the running accuracy and the service life of bearing products greatly.This is a problem anxious to be solved.
Purpose of the present invention and task are to provide a kind of brand-new super Seiko skill and lathe, it not only can be with bigger ultraprecision cutting surplus, excise the workpiece surface to be machined effectively because last operation grinding burn and residual softening metamorphic layer, and can high accuracy, expeditiously the bearing ring raceway is become the cydariform raceway face (in general: projection amount is 2～7 μ m or bigger, and the big I of convexity amount is adjusted according to the bearing products designing requirement) with certain convexity amount by the super essence in straight edge line surface that last operation is ground to.This bearing ring with convex bus surface, rolling element and lasso raceway contact area stress distribution are evenly reasonable in the course of the work can to guarantee bearing products, no longer produce the stress concentration phenomenon at raceway bus two ends, thereby improve greatly the running accuracy and the service life of bearing products.This brand-new crowned raceway is for the automobile specified bearing, precision machine tool main shaft bearing, passenger train and lorry at a high speed and quasi high-speed bearing improve its running accuracy, rotating speed, service life and have great Technological Economy meaning.This also has realistic meanings for microstoning such as auto parts (as: bent axle, camshaft, piston pin etc.), Hydraulic Elements equally.
Purpose of the present invention and task are achieved in that
1. on same lathe, have two work spindles and two super smart oscillating components, use different cutting data (rotating speed, pressure, frequency of oscillation etc.), different types of oilstone (different abrasive materials, different granularities, different binding agent etc.) is realized from " thick super " station super smart to " two-step method " of " smart surpassing " station to workpiece.It can excise the processed raceway face of workpiece because the softening metamorphic layer that the processing of last operation mill produces effectively with bigger ultraprecision cutting surplus (can reach 8～10 μ m, even bigger).
2. the oilstone width h of microstoning use is less than 1/2 of surface to be machined bus length H, that is: h＜1/2H; (be generally 1～10kgf) presses to by super smart working surface oilstone with pressure P in process, have on the one hand high-frequency (be generally 3000 times/min) and small amplitude (be generally " incision " motion of 0～2mm), oilstone has again along processed workpiece bus and makes big back and forth " running through " move (seeing Fig. 1, Fig. 2) with the speed V that changes on the other hand.
3. oilstone is do speed change degree big back and forth " running through " motion along processed bus surface, as midpoint (L=1/2H place) its reciprocating speed the fastest V=± Vmax ("+", "-" represent reciprocating direction) of oilstone at bus; When oilstone when bus two ends direction is moved, reciprocating speed slows down gradually; When oilstone at its reciprocating speed V=Vmin=0 of bus two ends place, and do short stay in 0～3 second, the length of its time of staying can be selected arbitrarily to adjust according to the required convexity amount of microstoning size.
4. by above-mentioned 1,2,3 result, realize that high accuracy, high efficiency microstoning go out middle cydariform bus raceway face (see figure 3) with convexity amount △.
Provided by the present invention is a kind of brand-new super Seiko skill and lathe, it is compared with existing super precision method and lathe, can not only excise the softening metamorphic layer that surface to be machined produces owing to grinding effectively with high efficiency and big ultraprecision cutting surplus (generally can reach more than 8～10 μ m), and use this new method superlinishing workpiece bus surface to show through high-accurate outline instrument measurement result: the super essence in straight edge line surface that it has been ground to last operation effectively becomes the cydariform surface (generally can reach 2～7 μ m) with certain convexity amount.With sampling observation microstoning 7507E tapered roller bearing ring raceway is the example explanation: this workpiece microstoning time is 12 seconds, and detecting instrument uses Britain Toylor-Hobson high-accurate outline instrument, and super smart back bus projection amount is about 4.478 μ m (see figure 4)s.The bearing ring on this band convex bus surface, rolling element and lasso raceway contact area internal stress are evenly distributed rationally in the course of the work to have realized bearing products, guarantee that raceway bus two ends no longer produce the stress concentration phenomenon, thus improve effectively the bearing products running accuracy and service life (see figure 5).
Concrete structure of the present invention is given by following embodiment and accompanying drawing:
Fig. 1 is to be representative with roller bearing inner ring sleeve circle, and circular cone or cylindrical outer surface are adopted " incision----runs through " method microstoning and become the schematic diagram on convex bus surface.
Fig. 2 is to be representative with roller bearing outer shroud lasso, and circular cone or internal surface of column are adopted " incision----runs through " method microstoning and become the schematic diagram on convex bus surface.
Fig. 3 goes out to have the cydariform bus exterior view of middle convexity by " incision----runs through " method microstoning.
Fig. 4 adopts " incision----runs through " method microstoning tapered roller bearing ring crowned raceway to detect example.
Fig. 5 has rolling of crowned raceway to give bearing working district stress envelope.
Fig. 6 is overall thought and propose total figure of " incision----run through " convex bus two-step method Superfinishing machine bed according to the present invention.
Fig. 7 realizes big back and forth " transfixion " the super smart concrete structure profile of speed change degree of the present invention.
Fig. 8 is the big back and forth K-K profile of " transfixion " super smart structure shown in Figure 7.
Fig. 9 realizes the super smart concrete structure profile of the present invention's " plunge method ".This mechanism is mounted on the big reciprocator of the described speed change of Fig. 7 slide plate 11 in use.
Below in conjunction with these accompanying drawings most preferred embodiment of the present invention is described in detail:
Fig. 6 shows the master-plan of " incision----runs through " convex bus two-step method Superfinishing machine bed.A1 is the right oscillating component that is used for thick super processing, and it is by realizing having thick super station to make the reciprocal B1 of mechanism of speed change degree and realize that the C1 of the incision mechanism common combination that thick super station is made the higher-order of oscillation forms.A2 is the left oscillating component that is used for smart super processing, and it is identical with A1, is to make the reciprocal B2 of mechanism of speed change degree and realize that the C2 of the incision mechanism common combination that smart super station is made the higher-order of oscillation forms by being implemented in smart super station.Be transported to thick super station II by feeding mechanical hand from material loading station I by the superlinishing workpiece, after thick super process finishing, be transported to smart super station III again and carry out the super processing of essence.Slightly, after smart super processing all finishes, finished product is transported to blanking station IV, is implemented in the super sugared processing of two-step method from " thick super " to " essence surpasses " on same the lathe.In " thick super " station II, right oscillating component A1 goes up clamping thick (as: the aluminium oxide kind oilstone of W10～W14) of excellent cutting performance and abrasive grain, (as: 2000～3000 commentaries on classics/min) adopt reciprocating speed faster with oilstone realize excising effectively the softening metamorphic layer (generally can reach 8～10 μ m) that surface to be machined brings owing to a last operation grinding to select lower workpiece rotational frequency.Meanwhile, again the super essence in workpiece straight edge line surface is become the morphology of band convex bus.In " smart super " station III, left side oscillating component A2 go up clamping have abrasive grain very thin (as the carborundum of superior performance of W3～W5) (or: abrasive material cube boron carbide etc.), (as: 3000～6000 commentaries on classics/min) adopt slower speed change reciprocating speed (as: realizing 1～3 reciprocal two-pass in the microstoning cycle) with oilstone make by superfinish and obtain optimal surface roughness (generally can reach Ra0.03～0.05) to select higher workpiece rotational frequency.
Fig. 7, Fig. 8 make oilstone make speed change big reciprocal mechanism and equipment, the i.e. profile of B1 and B2 mechanism among Fig. 6 along processed bus according to the present invention.
Buncher 5 drives worm type of reduction gearing 4 (or other types decelerator), makes take-up housing 3 low speed rotation that are fixed on the output shaft 18.Two covers have been installed on the little axle of the eccentric shoe 6 that matches with take-up housing 3 have been eliminated the bearings 7 of end-plaies by guide groove plate 8.Guide groove plate 8 is fixed on " clamping----vertically F.F., rewind down " cylinder body 9, after clamping cylinder 20 feeds hydraulic oil, the clamping piston bar makes eccentric shoe 6, oil cylinder 9 a whole set of mechanisms and the oilstone high frequency small oscillation mechanism that is installed on the slide plate 11 joins together.
When 3 rotations of eccentric shoe seat, make bearing 7 do the circumference simple harmonic motion around reducer output shaft 18, can do back and forth " running through " motion of speed change degree along the guide pass of high-accuracy rolling guide rail 10,13 thereby drive the oilstone of clamping on a whole set of oscillating mechanism.
The speed change degree back and forth speed speed of " running through " motion is to realize by the rotating speed of adjusting buncher 5.
The speed change degree back and forth stroke size of " running through " motion is to realize by the center of the bearing 7 on the adjustment eccentric shoe 6 eccentric size with respect to axle 18.
Speed change back and forth " running through " motion is to lean on the braking time length of electric switch 21 and 19 senders control buncher 5 to realize in the time of staying at bus two ends.
When lathe was used to process the tapered roller bearing ring raceway, its processing raceway cone angle size was by worm screw 15, rotates and realize by axle 17, worm gear 16, gripping sleeve 12 drive revolving bodies 2.After the cone angle adjustment finishes, be fastened on the base 1 with screw 14.
Fig. 9 be realize again when making oilstone press to surface to be machined with certain pressure according to the present invention high-frequency (3000 times/min), little amplitude (0～2mm) " plunge method " Superfinishing machine structure and equipment.Be C among Fig. 6
1, C
2The profile of mechanism.
Belt pulley that the axle head of buncher 22 is installed 23 through synchronizing jugged belt 24 (or: other band transmissions such as many wedges V-belt), belt pulley 25 and drive eccentric shaft 26 (3000 times/min) rotation at a high speed.Eccentric shaft 26 is made up of two offset equal and opposite in directions (2mm), eccentric shaft that eccentric phase place is opposite.Eccentric shaft 26 outsides are equipped with two eccentric bushings 29,33, and each 2 cover bearing is installed in the eccentric bushing outside.When eccentric shaft 26 rotates at a high speed, driving bearing inner race by eccentric bushing 33 rotates at a high speed, bearing outer ring is then made back and forth pure rolling of high speed in guide groove plate 35, and is installed in the slide block 30 in the accurate rolling guide 28 and is fixed on the oilstone knife bar seat 31 realization high-frequencies on the slide block 30, the oscillating movement of little amplitude by guide groove plate 35 drives.Meanwhile, by eccentric bushing 29, guide rail 27, slide block 32, drive balance weight 36 and carry out the oscillating movement of high-frequency, little amplitude with opposite phases, inertia force cancels out each other and static balance when vibrating at a high speed with realization.
The oilstone pressurization of " plunge method " Superfinishing machine structure is to drive the C1 of incision mechanism, the C2 (Fig. 6) that are installed in the whole series on the base 34 by oil cylinder 37 to realize.The speed of " plunge method " frequency of oscillation is to realize by the rotating speed that changes buncher 22.And the amplitude size is to realize by the offset size of adjusting eccentric shaft 26 and eccentric bushing 29,33.
Claims (2)
1. one kind becomes the method with band convex bus surface to circular cone or the inside and outside surperficial microstoning of cylinder straight edge line, it is characterized in that:
(1) on same lathe, be separately installed with the work spindle of two separate transmission and the super smart oscillating mechanism of two separate transmission, they be respectively applied for thick super station and the super station of essence carry out " two-step method " super smart;
(2) different at technological parameters such as the vibration of the rotating speed of the vibration of the kind of the rotating speed of thick super station workpiece, oilstone abrasive material, granularity thickness, oilstone and reciprocating frequence and the super station workpiece of essence, oilstone abrasive species, granularity thickness, oilstone and reciprocating frequences;
(3) clamping has the narrow oilstone of width less than surface to be machined bus length 1/2 on the superlinishing oscillating mechanism, oilstone is pressed to surface to be machined under oscillating mechanism drives after, it is super smart for " incision " method of＜4000 times/min, amplitude＜4mm to carry out frequency on the one hand, and meanwhile oilstone is done the big reciprocal super smart motion of " running through " method of speed change degree along processed bus again;
(4) oilstone is when doing speed change degree big back and forth " running through " motion along processed bus, in the central region of workpiece bus length 1/2, it moves back and forth fastest V=Vmax oilstone, along with oilstone towards toward the motion of processed bus direction of both ends the time, speed reduces gradually, when the oilstone movement position was in bus two ends head zone, it moved back and forth speed V=Vmin=0;
(5) oilstone can be done the short stay of 0～3 second time in processed bus two ends head zone, its time of staying length can be carried out stepless selection according to the needed convexity amount of workpiece to be machined surface bus size, thereby super essence goes out needed convex bus working surface.
2. one kind is used the described method of claim 1 and the superfinisher of special invention design, it is characterized in that: the work spindle that on same lathe, is separately installed with two separate transmission, a main shaft is to be used for slightly super station to drive the workpiece rotation, another main shaft is to be used for smart super station to drive workpiece rotation usefulness, overlap the super smart oscillating mechanism of drive and on the lathe bed of lathe, be separately installed with two, the right oscillating component (A1) that wherein is used for thick super processing, it is to be become with super smart high frequency small oscillation mechanism (C1) the common combination face of " incision " method of realization by the super smart speed change reciprocator (B1) of " running through " method of realization, the left oscillating component (A2) that is used for smart super processing, it is by realizing that super smart big reciprocator of speed change (B2) of " running through " method and super smart high frequency small oscillation mechanism (C2) common combination of " incision " method of realization form;
The big reciprocator of the super smart speed change of described two realizations " running through " method (B1, B2) comprising:
(1) buncher (5) and decelerator (4) that can change the big reciprocating motion speed of oilstone speed;
(2) being equipped with on the output shaft of decelerator (4) can be according to the needs of oilstone reciprocating stroke size and can adjust the eccentric shoe (3,6) of offset size arbitrarily;
(3) bearing (7) that is embedded in the guide groove plate (8) and can slides along guide groove plate (8) is installed on eccentric shoe (6);
(4) guide groove plate (8) is fixed on " clamping----vertically F.F. and vertical rewind down " cylinder body (9), and the piston rod of oil cylinder be installed in the slide plate (11) that the high-accuracy rolling guide rail pays and link, when clamping cylinder (20) feeds pressure oil, can clamp piston rod, thereby make guide groove plate (8), oil cylinder (9,20) and slide plate (11) be tightened to a rigid body;
(5) buncher (5) can drive eccentric shoe (3) rotation and drive bearing (7) and do the circumference simple harmonic motion around reducer output shaft (18), thereby makes a whole set of oscillating mechanism that is installed on the slide plate (11) do the reciprocating motion of speed change along guide rail (10,13);
(6) electric switch (19,21) capable of emitting signal control buncher makes its two ends zone braking at big reciprocating stroke, can adjust braking time by the time relay, realizes 0～3 second stop;
(7) worm screw (15), worm gear (16) can drive the sleeve mechanism revolution, adjust the super smart big back and forth angle of bus movement locus, realize the element of cone microstoning to various cone angle sizes;
The super smart high frequency small oscillation mechanism (C1, C2) of described two realizations " incision " method comprising:
(1) one can change buncher (22) the process belt transmission of adjusting rotating speed, drives long eccentric shaft (a 26) rotation of being made up of the equal and eccentric fully opposite eccentric shaft of direction of two offset sizes;
(2) eccentric shaft (26) outside is equipped with two eccentric bushings (29,33), and the eccentric bushing outside installs respectively that two covers are embedded in the guide groove plate (35) and can be along the bearing of guide groove plate PURE ROLLING;
(3) two guide groove plates (35) are separately fixed on the accurate rolling guide (30,32);
(4) be fixed on the guide rail (30) oilstone knife bar seat (31) be fixed on the guide rail (32) balance weight (36) its be equal in weight, identical in quality, its inertia force equal and opposite in direction when under buncher drives, making high-frequency, little amplitude motion, direction is opposite, realizes steady shock-free vibration;
(5) oilstone pressurized cylinder (37) can drive sleeve mechanism and moves, and the oilstone that is installed on the oilstone knife bar seat (31) is pressurizeed to superlinishing surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96104405A CN1063377C (en) | 1996-04-01 | 1996-04-01 | Process and machines for superfine machining convex bus by cutting into-through two step process |
| CN 96220543 CN2332531Y (en) | 1996-04-01 | 1996-09-13 | 'Pitching-in and through-cutting' two-step bearing bearings ring convexity trunk tray super-fine machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96104405A CN1063377C (en) | 1996-04-01 | 1996-04-01 | Process and machines for superfine machining convex bus by cutting into-through two step process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1142425A CN1142425A (en) | 1997-02-12 |
| CN1063377C true CN1063377C (en) | 2001-03-21 |
Family
ID=5118338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96104405A Expired - Fee Related CN1063377C (en) | 1996-04-01 | 1996-04-01 | Process and machines for superfine machining convex bus by cutting into-through two step process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1063377C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103029027B (en) * | 2012-09-19 | 2015-07-08 | 新昌县诚本轴承滚子有限公司 | Super-finishing machine for spherical bearing roller |
| CN103029014A (en) * | 2012-12-28 | 2013-04-10 | 瓦房店轴承集团有限责任公司 | Matching process of large taper-angle tapered roller bearing components of automobile |
| DE102015220319A1 (en) * | 2015-10-19 | 2017-04-20 | Supfina Grieshaber Gmbh & Co. Kg | Apparatus and method for finish machining an inner surface of a workpiece |
| CN116277875A (en) * | 2023-01-16 | 2023-06-23 | 苏州铁近机电科技股份有限公司 | Method for processing bearing inner race rollaway nest |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024672A (en) * | 1974-03-18 | 1977-05-24 | Supfina Maschinenfabrik Hentzen Kg | Apparatus for the micro-finish of cylindrical or conical surfaces |
| CN1067201A (en) * | 1991-05-24 | 1992-12-23 | 襄阳轴承厂 | The super Seiko skill of cylindrical roller and taper roller convexity |
| GB2290996A (en) * | 1994-07-06 | 1996-01-17 | Grieshaber Masch | Precision finishing process |
-
1996
- 1996-04-01 CN CN96104405A patent/CN1063377C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4024672A (en) * | 1974-03-18 | 1977-05-24 | Supfina Maschinenfabrik Hentzen Kg | Apparatus for the micro-finish of cylindrical or conical surfaces |
| CN1067201A (en) * | 1991-05-24 | 1992-12-23 | 襄阳轴承厂 | The super Seiko skill of cylindrical roller and taper roller convexity |
| GB2290996A (en) * | 1994-07-06 | 1996-01-17 | Grieshaber Masch | Precision finishing process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1142425A (en) | 1997-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200948555Y (en) | Bearing roller superfine grinder | |
| CN201115928Y (en) | Ultra-smooth grinding composite technological equipment for processing excircle | |
| CN1152762C (en) | Device and method for processing crank shaft journal | |
| US3663188A (en) | Cam control grinding machine | |
| CN1626312A (en) | Method of honing bores | |
| KR102020853B1 (en) | Machine and method for turning at least flat shoulders of a crankshaft that surround bearing pins | |
| US6994001B2 (en) | Device to produce round cross-section articles with complicated profiled surfaces | |
| CN200981174Y (en) | Inner bore grinding device for general lathe | |
| US4538945A (en) | Apparatus for machining a polygon profile on a workpiece | |
| US4222203A (en) | Machining device and method | |
| CN1063377C (en) | Process and machines for superfine machining convex bus by cutting into-through two step process | |
| CN2332531Y (en) | 'Pitching-in and through-cutting' two-step bearing bearings ring convexity trunk tray super-fine machine tool | |
| DE102014211937C5 (en) | Method and device for finish machining peripheral surfaces of rotationally symmetrical workpiece sections | |
| HU209638B (en) | Method and apparatus for generating machining with abrasive belt | |
| US4697387A (en) | Device for grinding tooth profiles of a rotating toothed workpiece | |
| EP0981420A1 (en) | Polishing head for plate materials in granite, hard stone or ceramic with abrasive segments having continuous oscillating tangential motion | |
| CN1562565A (en) | High performance mirror polish equipment with double grinding heads and technique method of mirror polish | |
| CA1084270A (en) | Orbiting cutter tangential machining tool | |
| CN2137190Y (en) | Machining device for combined flange and sealing surface of valves | |
| CN1237727A (en) | Variable-diameter variable-pitch and variable-tooth type angular screw guide wheel numerically-controlled grinder | |
| IL39308A (en) | Cam control grinding machine | |
| US3142940A (en) | Machine for lapping gears | |
| CN106424831B (en) | Pulley type vibration drilling workbench | |
| GB2032306A (en) | Device for positioning non-circular workpieces | |
| US4210039A (en) | Apparatus for forming non-circular workpieces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |