CN1042506C - Apparatus and method for grinding spherical surface - Google Patents
Apparatus and method for grinding spherical surface Download PDFInfo
- Publication number
- CN1042506C CN1042506C CN93112931A CN93112931A CN1042506C CN 1042506 C CN1042506 C CN 1042506C CN 93112931 A CN93112931 A CN 93112931A CN 93112931 A CN93112931 A CN 93112931A CN 1042506 C CN1042506 C CN 1042506C
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- Prior art keywords
- grinding
- disk wheel
- wheel
- workpiece
- ball surface
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- Expired - Fee Related
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B11/00—Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
To yield a product with high surface preciseness without generating axial dislocation by furnishing a finish grinding device to grind a spherical surface, ground by a recessed cylindrical surface of a disc-form grinding tool, further with a hollow cylindrical grinding tool having a grain size smaller than the disc-form grinder. A spherical surface grinding device comprises a disc-form grinding tool on grinding wheel 7, a wheel spindle stack 1 to support rotatably round the axis passing perpendicularly the center point on the circular plane of the grinding wheel 7, a table 2 adjacent to the wheel spindle stock 1 and arranged parallel with the rotational axis of the grinding wheel 7, a moving means to reciprocate the table 2 parallel with the rotary shaft of the grinding wheel 7, and a headstock 3 installed at one end of the table 2, wherein the main spindle 4 on the headstock 3 extends parallel with the rotary shaft of the grinding wheel 7, and a work to be ground 6 is secured to a flange 5 at the foremost part of the main spindle 4, which is then rotated with the flange 5 by a rotating means. Besides, a finish grinding device 9 is equipped with a hollow sylindrical grinding tool 8 having a smaller grain size than the grinding wheel 7 and further grinds the spherical surface 17 of the work 6 having undergone grinding with the recessed circumferential surface of the grinding wheel 7.
Description
The present invention relates to a kind of equipment and method of grinding spherical surface, particularly, relate to a kind of equipment for grinding and method that requires the surface accurate degree as sewing machine bent axle ball surface.
Bent axle is an important transmission device of drive system in sewing machine, and rotatablely moving of it is sent on the various parts of sewing machine through various bars.The linkage section of bar and bent axle is a ball-joint.For example, a needle bar crank bar matches with the ball portion of bent axle.For as the bent axle of ball-joint, the polishing of this ball portion is required high precision.
Up to now, sewing machine bent axle ball portion is by in addition grinding of a cylindrical grinding processing unit (plant), and it has used the disk wheel of rotation at a high speed.After the surface is ground to the about 0.8Ra of surface roughness with a cylindrical grinding machine, be called oil grinding or oil abrasion to carry out polished surface.In oil abrasion processing, after carrying out conventional grinding with the cylindrical grinding machine, a spherical part (being called ball later on) and a bar connect together, and oil is supplied on the coupling part, causes that then rotation is till the bonding part obtains steady fricting movement.In grinding, can use in machine oil (i.e. a grinding agent) suspension of the emery wheel powder (hereinafter being called butcher cuts) that suspends to replace oil in the oil grinding processing.
But utilize the independent grinding of above-mentioned cylinder grinding machine, can not obtain 0.2Ra or lower surface roughness.If obtain being lower than the surface roughness of 0.2Ra, must adopt #100 or above emery wheel.This means that grinding not only needs the long time but also produces the polishing superheating phenomenon owing to stopping up, thereby reduced the case hardness of finished ball.In addition, in oil grinding processing, operation is inconvenient, and efficient is especially low, and in grinding, butcher cuts (emery wheel powder) is invaded the surface of ball or bar, only depends on flushing can not remove the powder of intrusion.The powder of invading has promoted the wearing and tearing of composition surface, and the life-span of having reduced joint widely.In addition, above-mentioned processing makes vertical diameter of ball be slightly shorter than trans D, causes the bad friction of bonding part like this.Further, in oil abrasion processing or oil grinding processing,, special ball and bar are set for the fine finishining friction surface.Therefore, if the fine finishining bar damages separately, replace new another finishing operations of need.That is, exist the problem of related parts non-interchangeability.
An object of the present invention is to provide a kind of ball surfacing equipment and method, it can solve the aforementioned problems in the prior, and wherein usually grinding and fine ginding are operated as series and carried out the interchange components that has pinpoint accuracy stably to provide.
To achieve these goals, provide an equipment that is used for workpiece ball surfacing according to an aspect of of the present present invention, it comprises a disk wheel, the ball surface of its spill circumferential surface and workpiece matches, one supporting disk wheel is so that its emery wheel supporting of rotating round the central axis perpendicular to its circle plane surface, one contiguous emery wheel supporting platform that be provided with and that be parallel to the disk wheel rotation, one makes described facing to the parallel reciprocating drive unit of disk wheel rotating shaft, one is contained in described one headstock on the end, one is positioned on the headstock also along being parallel to the main shaft that the disk wheel rotating shaft extends, one is used for fixing the flange of workpiece on the main shaft free end, one whirligig and that main shaft and flange are together rotated is positioned at and is used for refiner that the ball surface of workpiece is finish grinded on the flange, and this machine is narrower than the different emery wheels of disk wheel to being finish grinded by the workpiece ball surface of the spill circumferential surface grinding of disk wheel with grit size.
According to a second aspect of the present invention, a kind of method with ball surfacing equipment grinding work piece ball surface is provided, equipment for grinding comprises a disk wheel, one supporting disk wheel is so that it is round the emery wheel supporting perpendicular to its circle plane surface central shaft rotation, one is adjacent to emery wheel supporting platform that be provided with and that be parallel to described disk wheel rotating shaft, make described facing to the parallel reciprocating drive unit of disk wheel rotating shaft, one is contained in the headstock in the you portion, one is positioned on the headstock also along being parallel to the main shaft that the disk wheel rotating shaft extends, one is positioned at the main shaft free end is used for fixing the flange of workpiece and makes main shaft and whirligig that flange together rotates, one has the fine ginding machine of hollow cylinder, this machine is used for being finish grinded by the ball surface of the workpiece of the spill circumferential surface grinding of disk wheel, the fine ginding facility have a grit size different emery wheels thinner than disk wheel, the end of described hollow cylinder has to convex, oblique surface, and cylinder is located on the described flange, described method comprises the ball surface that is fixed to the workpiece on the flange with the recessed circumferential surface grinding of disk wheel, then the described hollow cylinder emery wheel that a grit size is narrower than disk wheel is pushed against on the ball surface so that the ball surface is finish grinded with an elastic device, described correct grinding is to carry out when it discharges fully when elastic device is compressed fully, so beginning to be discharged into from elastic device in the time that discharges fully, the hollow cylinder emery wheel with the ball surface by the elastic force clamping of elastic device self and is contacted.
Because in the ball surfacing equipment that uses the disk wheel that rotates at a high speed, the different emery wheels that are narrower than disk wheel with grit size are to being carried out fine ginding by the workpiece ball surface of disk wheel grinding, therefore can be on same equipment with disk wheel the surface roughness of workpiece be milled to 0.2-0.4Ra continuously, and on same equipment, makes surface roughness reach 0.1-0.2Ra by fine ginding.Can eliminate axial dipole field like this and improve the surface of the work precision.
According to the present invention, disk wheel be a kind of be the molded emery wheel that forms of abrasive particle of #60 to #80 by granularity, for example can be dish type.The circumferential surface of disk wheel is processed with a spill that matches with workpiece ball surface.
According to the present invention, the workpiece ball surface that the spill circumferential surface grinding by disk wheel is obtained is again with a different emery wheels grinding continuously that comprises than the fine grinding wheel abrasive particle.This grinding is called correct grinding.In correct grinding, further ground off the 5-20 micron by the ball surface of disk wheel grinding.The fine ginding emery wheel has a hollow cylinder and can be the molded emery wheel of #600-#800 by for example abrasive particle, and making as overall diameter is 10mm and interior diameter is the hollow cylinder of 8mm.This hollow cylinder emery wheel have an inwardly protruded end surfaces with contacted end, workpiece ball surface.Decide the interior external diameter of hollow cylinder emery wheel and the lean-in oblique angle of end surfaces according to the size of workpiece, kind etc.
In the present invention, preferably by means of the fine ginding emery wheel being pushed against on the workpiece as spring.In this configuration, when grinding began and finish, the power that pushes away emery wheel was self elastic force of spring, so it can prevent the damage to the fine ginding emery wheel.Can utilize an autonavigator and an automatic ration gauge that workpiece and emery wheel are positioned and can detect the grinding degree.
When existing between the axle of workpiece and position, workpiece bulb when eccentric, for example under the situation on the ball surface of grinding sewing machine bent axle, the most handy eccentric fixture is set up off-centre.
Fig. 1 shows a partial view according to the embodiment of ball surfacing device of the present invention;
Fig. 2 shows the view of correlation between eccentric fixture and workpiece;
Fig. 3 shows the operation principle view of a diagram based on eccentric fixture;
Fig. 4 shows the view that the position concerns between workpiece and hollow cylinder emery wheel in an explanation one embodiment of the invention.
Now, will describe the present invention in conjunction with the embodiments in detail.
Fig. 1 shows a partial view according to the embodiment of ball surfacing device of the present invention.This device comprises a disk wheel 7, one supporting disk wheel 7 is so that it supports 1 round an emery wheel that rotates perpendicular to the axis of its circle plane surface, one is positioned at emery wheel supporting 1 side, the platform 2 that is parallel to disk wheel 7 rotations, make platform 2 reciprocating drive unit (not shown) on the direction that is parallel to disk wheel 7 axis, one is contained in the headstock 3 of platform 2 one ends, a tailstock (not shown) that is oppositely arranged with the headstock 3, main shaft 4 is housed on the headstock 3, this edge is parallel to the direction of disk wheel 7 axis and extends, one is contained on main shaft 4 one ends flange 5 with fixation workpiece, the whirligig (not shown) that main shaft 4 and flange 5 are together rotated, and one be used for refiner that the spherical that is fixed in the workpiece on the flange 5 is finish grinded, above-mentioned workpiece was ground by emery wheel 7, and the abrasive particle of the mill fineness ratio disk wheel 7 of the used emery wheel 8 of this refiner is thin.Be processed with a concave surface on the circumferential surface of disk wheel 7, in order to match with the ball surface of workpiece.The disk extension of disk wheel 7 is perpendicular to the extension of the headstock 3 that extends along the axis of main shaft 4.Disk wheel 7 and main shaft 4 can be provided with along above-mentioned extension.Sequence number 10 is eccentric fixtures, and 11 is end face locators, and 12 is automatic quantitatively gauges, and 13 is lubricators, and 18 is one to be used for the oil gear of automatic ration gauge.
For example, when the ball of grinding sewing machine bent axle is surperficial, adopt this structure, use an eccentric fixture to come relative crankshaft center line to form the off-centre on coaxial ball surface.Fig. 2 shows the situation that bent axle 6 is fixed to eccentric fixture 10.Fig. 3 is the view of explanation eccentric fixture 10 operation principles.
Referring to Fig. 2 and 3, eccentric fixture 10 comprises the concrete 10A of a cam lock, one is positioned at the bent axle patchhole 14 on the clamp body 10A, one stop block 15, the one edge is used to bent axle 6 location that are inserted in the bent axle patchhole 14, and a hold-down screw 19 that will be fixed to by the bent axle 6 that stop block 15 is located on the clamp body 10A.
A segment distance A is departed from the center 16 of above-mentioned bent axle patchhole 14 relative eccentric fixtures 10.Eccentric throw A equals the eccentric throw of ball surface 17 relative bent axle 6 axis.Part shown in the sequence number 20 is a screw hole, and screw is threaded in this hole the eccentric fixture 10 with flange 5 in the fixing ball surface grinding equipment.
Utilize this structure, when being fixed to bent axle 6 on the eccentric fixture 10, bent axle 6 is inserted in the bent axle patchhole 14.Then, regulate bent axle 6, thereby the eccentric sphere surface 17 of bent axle 6 is positioned on the extended line of eccentric fixture 10 central axis, and bent axle 6 is by stop block 15 location that are put on the bent axle 6.For keeping this state, screw in screw 19, thereby bent axle 6 is fixed on the eccentric fixture 10.
After being fixed to bent axle 6 on the eccentric fixture 10, stop block 15 is unclamped from bent axle 6, and pull down from eccentric fixture 10, like this, bent axle 6 is fixed on the eccentric fixture 10.
The eccentric fixture 10 that bent axle 6 is housed is fixed on the flange 5 of ball surfacing machine shown in Figure 1, because workpiece moves on the flange 5, ball surfacing machine and bent axle 6 are together driven.When ball surfacing machine was driven, main shaft 4 had been with bent axle 6 for example rotating under the 200rpm speed.Subsequently, main shaft 4 moves along the direction parallel with the rotation of disk wheel 7, when ball surface 17 arrives the displacement line of disk wheel 7, utilizes the instruction that receives from end face locator 11 that main shaft 6 is stopped.Then, the ball surface 17 of bent axle 6 rotation continuously on the displacement line of disk wheel 7.Then, thus emery wheel supporting 1 and the disk wheel 7 that under 1500rpm speed for example, rotates together near curve 6 at a high speed the spill circumferential surface of the disk wheel of rotation push against on the ball surface 17 of bent axle 6.Like this, begun the grinding on bent axle 6 ball surfaces 17.At this moment, supply cutting oil from lubricator 13 to grinding skin.When ball surface 17 is ground to a scheduled volume, as the automatic ration gauge work of control device, so disk wheel 7 separates with ball surface 17 and stopping to be advanced to a precalculated position.Then, refiner 9 is started working so that the hollow cylinder emery wheel 8 that is fixed on its end is for example rotating under about 800rpm speed round the axis of emery wheel 8.Above-mentioned a series of actions all can be realized by conventional sequence control system.In this state, the main shaft of refiner 9 stretches out with the hollow cylinder emery wheel 8 that orders about rotation and leans against on the ball surface 17 of rotation, carries out fine ginding in this way.Fig. 4 is the zoomed-in view that mutual alignment relation between hollow cylinder emery wheel 8 and the bent axle 6 ball surfaces 17 is shown.With reference to this figure, hollow cylinder emery wheel 8 has an end face to convex in order to match with ball surface 17.Like this, realize fine ginding by the rotation inner periphery of hollow cylinder emery wheel 8 lower ends with the contacting of ball surface 17 of rotation.
Hollow cylinder emery wheel 8 is being kept pushing against on the ball surface 17 by the spring (not shown) as elastic component, and the pressured spring production of contracting of initial thrust.That is, ball surface 17 effective grindings are to begin in the moment that spring compresses fully.Realized fine ginding like this, and detected when finishing predetermined fine ginding when automatic ration gauge 12, the thrust of spring has been reduced gradually.In the time of under thrust reduces to predetermined value, begin elongation at the spring of compressive state.Behind spring full extension, hollow cylinder emery wheel 8 separates with ball surface 17.This means that beginning to stretch until the time of its full extension from spring for example is that 5 seconds hollow cylinder emery wheels 8 are by the elastic force maintenance of spring self and contacting of ball surface.Like this, polished by the surface after making grinding with the grinding of carrying out unusual micro thrust.
Including in the embodiment of the such ball surfacing equipment of the fine ginding machine 9 of the hollow cylinder emery wheel 8 of its center rotation, for example using continuously under the situation of anchor clamps, emery wheel with #60-#80 obtains common grinding, can obtain fine ginding with #600-#800.Like this, can need not the ball surface that centering still can obtain axially not departing from and having the finished product of high surface accuracy in the time at fine ginding.In addition, in the short time cycle, can produce high quality of products as one man, and stability and productivity ratio can be improved to greatest extent.In addition, different with the grinding of prior art with similar processing, on grinding skin, the shearing wedge can not be arranged, prolonged the life-span of product so widely.Have again, because the fine ginding that carries out with the hollow cylinder emery wheel among this embodiment is after the corase grind that carries out with disk wheel is cut, so can avoid because the phenomenon that the overheated case hardness that causes of the friction seen in the prior art reduces.Further, can prolong the polishing gap of disk wheel 7.
In this embodiment, when the hollow cylinder emery wheel 8 of fine ginding machine was pushed against on the workpiece by spring, the thrust at fine ginding end place can be spring self elastic force.So, suitably select the elastic force of spring, just can obtain a small thrust with precise polished in addition to surface of the work.
In this embodiment in the ball surface of Huo Deing, size X equals or preferably slightly is longer than Y (X 〉=Y), see Fig. 4, wherein, X represents down bottom, ball surface to the distance between top, last ball surface, and Y represents to pass the distance of ball centre between upper and lower ball surface.Like this, on the linkage section of 8 on ball surface 17 and hollow cylinder emery wheel, can steadily be rubbed, the difference of X and Y 1-2 micron preferably.
In the present invention, eccentric fixture 10 can be selected according to the kind of workpiece, size etc.The workpiece of rate can be ground without eccentric fixture without acceptance of persons, but needs directly to support this workpiece with flange 5.
Elastic component as pushing hollow cylinder emery wheel 8 can use Compressed Gas etc. except spring.
Motion among this embodiment of equipment on any bow direction of no workpiece and emery wheel (anti-motion just), like this, workpiece can be fixed with a cantilever support or the supporting on opposite end.
According to the present invention for required protection, utilize the fine ginding in the ball surfacing equipment, workpiece by an anchor clamps clamping situation under, can carry out conventional corase grind continuously and cut and the fine ginding step.Like this, can eliminate the product that axially departs from and obtain high surperficial accuracy.
In addition, according to invention required for protection, for example after the disk wheel that employing has a #60-#80 was milled to the corase grind of 0.2-0.4Ra with surface roughness, fine ginding adopted the hollow cylinder emery wheel that for example has #600-#800.Like this, can reduce the grinding time largely and boost productivity.
Claims (10)
1. equipment that is used for workpiece ball surfacing, comprise a disk wheel, this emery wheel has with workpiece ball surface kissing and merges the spill circumferential surface that is against on it, one supporting disk wheel is so that it is round the emery wheel supporting perpendicular to its circle plane surface central axis rotation, one contiguous emery wheel supporting platform that be provided with and that be parallel to described disk wheel rotating shaft, with so that platform facing to the parallel reciprocating drive unit of disk wheel rotating shaft, be contained in described one headstock on the end, one is positioned on the headstock also along being parallel to the main shaft that the disk wheel rotating shaft extends, one is positioned at the flange that the main shaft free end is used for fixing workpiece, the whirligig that main shaft and flange are together rotated, it is characterized in that, comprise that also one has the fine ginding machine of hollow cylinder, this machine is used for being finish grinded by the ball surface of the workpiece of the spill circumferential surface grinding of disk wheel, the fine ginding facility have a grit size different emery wheels thinner than disk wheel, the end of described hollow cylinder has to convex, oblique surface, and cylinder is located on the described flange, thereby the ball surface kissing that hollow cylinder and workpiece were ground merges and is against on it.
2. according to the equipment of claim 1, it is characterized in that described equipment comprises that also one detects the control device that is also begun fine ginding by the workpiece ball surface size of disk wheel grinding subsequently.
3. according to the equipment of claim 1, it is characterized in that described disk wheel is to become the formed product of a dish type by die casting 60# to 80# abrasive particle.
4. according to the equipment of claim 1, it is characterized in that described fine ginding machine is that the abrasive particle by die casting #600-#800 becomes the made product of a hollow cylinder.
5. according to the equipment of claim 1, it is characterized in that described fine ginding machine pushes against on the workpiece with an elastic device.
6. according to the equipment of claim 5, it is characterized in that described elastic device is selected from one of spring and Compressed Gas.
7. according to the equipment of claim 1, it is characterized in that the described ball surface of described workpiece is the ball surface of sewing machine bent axle, for the off-centre that forms bent axle ball surface adopts an eccentric fixture.
8. method with ball surfacing equipment grinding work piece ball surface, equipment for grinding comprises a disk wheel, one supporting disk wheel is so that it is round the emery wheel supporting perpendicular to its circle plane surface central shaft rotation, one is adjacent to emery wheel supporting platform that be provided with and that be parallel to described disk wheel rotating shaft, make described facing to the parallel reciprocating drive unit of disk wheel rotating shaft, one is contained in the headstock in the you portion, one is positioned on the headstock also along being parallel to the main shaft that the disk wheel rotating shaft extends, one is positioned at the main shaft free end is used for fixing the flange of workpiece and makes main shaft and whirligig that flange together rotates, one has the fine ginding machine of hollow cylinder, this machine is used for being finish grinded by the ball surface of the workpiece of the spill circumferential surface grinding of disk wheel, the fine ginding facility have a grit size different emery wheels thinner than disk wheel, the end of described hollow cylinder has to convex, oblique surface, and cylinder is located on the described flange, described method comprises the ball surface that is fixed to the workpiece on the flange with the recessed circumferential surface grinding of disk wheel, then the described hollow cylinder emery wheel that a grit size is narrower than disk wheel is pushed against on the ball surface so that the ball surface is finish grinded with an elastic device, described correct grinding is to carry out when it discharges fully when elastic device is compressed fully, so beginning to be discharged into from elastic device in the time that discharges fully, the hollow cylinder emery wheel with the ball surface by the elastic force clamping of elastic device self and is contacted.
9. according to the method for claim 8, it is characterized in that described elastic device is to select one from spring and compressed air.
10. according to the method for claim 8, it is characterized in that described ball surface is the ball surface of sewing machine bent axle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4344087A JP2941134B2 (en) | 1992-12-24 | 1992-12-24 | Spherical grinding device and grinding method |
| JP344087/92 | 1992-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1091348A CN1091348A (en) | 1994-08-31 |
| CN1042506C true CN1042506C (en) | 1999-03-17 |
Family
ID=18366556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93112931A Expired - Fee Related CN1042506C (en) | 1992-12-24 | 1993-12-20 | Apparatus and method for grinding spherical surface |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2941134B2 (en) |
| KR (1) | KR940013726A (en) |
| CN (1) | CN1042506C (en) |
| TW (1) | TW239848B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2814051C1 (en) * | 2023-11-17 | 2024-02-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Processing method for hollow balls |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862989B (en) * | 2010-06-08 | 2011-12-14 | 宁波大学 | Polishing method of non-spherical surface optical parts |
| CN103659517A (en) * | 2013-11-12 | 2014-03-26 | 江苏吉星新材料有限公司 | Machining-shaping method for sapphire spherical surface |
| CN110328591A (en) * | 2019-07-08 | 2019-10-15 | 中山市元一沉香产业投资有限公司 | Agilawood processing is with car pearl machine |
| CN111230561B (en) * | 2020-02-25 | 2021-05-11 | 上海能利实业有限公司 | Processing technology for manufacturing steel pipe by galvanized steel pipe truss |
| CN118386073A (en) * | 2024-05-13 | 2024-07-26 | 浙江恒钛隆智能装备有限公司 | Valve core ball sphere grinding machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3609918A (en) * | 1970-03-09 | 1971-10-05 | Harold F Hillman | Sphere grinding and polishing apparatus |
| SU1742040A1 (en) * | 1989-05-31 | 1992-06-23 | Саратовский авиационный завод | Method for centerless grinding of balls |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS545156B2 (en) * | 1972-06-26 | 1979-03-14 | ||
| JPS618280A (en) * | 1984-06-22 | 1986-01-14 | Canon Inc | Wheel spindle and method for curved face grinding |
-
1992
- 1992-12-24 JP JP4344087A patent/JP2941134B2/en not_active Expired - Fee Related
-
1993
- 1993-10-19 TW TW082108702A patent/TW239848B/en active
- 1993-11-26 KR KR1019930025383A patent/KR940013726A/en not_active Application Discontinuation
- 1993-12-20 CN CN93112931A patent/CN1042506C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3609918A (en) * | 1970-03-09 | 1971-10-05 | Harold F Hillman | Sphere grinding and polishing apparatus |
| SU1742040A1 (en) * | 1989-05-31 | 1992-06-23 | Саратовский авиационный завод | Method for centerless grinding of balls |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2814051C1 (en) * | 2023-11-17 | 2024-02-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Processing method for hollow balls |
Also Published As
| Publication number | Publication date |
|---|---|
| KR940013726A (en) | 1994-07-15 |
| CN1091348A (en) | 1994-08-31 |
| TW239848B (en) | 1995-02-01 |
| JPH06190702A (en) | 1994-07-12 |
| JP2941134B2 (en) | 1999-08-25 |
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