CN102240989A - Diamond disc type grinding stone and grinding method of spherical lens - Google Patents
Diamond disc type grinding stone and grinding method of spherical lens Download PDFInfo
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- CN102240989A CN102240989A CN2010102340315A CN201010234031A CN102240989A CN 102240989 A CN102240989 A CN 102240989A CN 2010102340315 A CN2010102340315 A CN 2010102340315A CN 201010234031 A CN201010234031 A CN 201010234031A CN 102240989 A CN102240989 A CN 102240989A
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- lens
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- grinding
- sphere
- grinding stone
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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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/01—Specific tools, e.g. bowl-like; Production, dressing or fastening of these tools
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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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
- B24B13/02—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor by means of tools with abrading surfaces corresponding in shape with the lenses to be made
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
- B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
- B24D3/10—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements for porous or cellular structure, e.g. for use with diamonds as abrasives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/06—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor with inserted abrasive blocks, e.g. segmental
Abstract
The invention provides a diamond disc type grinding stone and a grinding method of a spherical lens. The diamond disc type grinding stone can perform prescribed grinding processing within a short period and perform grinding in a prescribed surface roughness fashion so as to make less processing operations left in the subsequent grinding process. The diamond disc type grinding stone (60) for the spherical lens comprises a tool disc main body (62) having a spherical surface (61) matching the lens spherical face of an object to be processed, a grinding material layer (63) having a certain thickness and laminated on the spherical surface (61). Lapping-in rectifying processing is performed on the diamond pellets (65) protruding from the surface (63a) of the grinding material layer (63) so as to make the disparity between the maximum protruding value (H1) of the diamond pellets (65) and the minimum protruding value (H2) below a prescribed valve (Delta H). In this way, the grinding marks left on the grinding face by the diamond disc type grinding stone (60) can be reduced without decreasing the grinding speed of the diamond disc type grinding stone (60). Therefore, the grinding face precision is improved.
Description
Technical field
The method for grinding that the present invention relates to a kind of diamond dish-type grinding stone that when the optical spherical lens that is used for digital camera etc. is carried out grinding, is adopted and adopt the spherical lens of this diamond dish-type grinding stone.
Background technology
As the method for grinding of optical spherical lens, there is utilization to comprise the sphere generation method that the dish-type grinding stone of the grinding face of dome shape carries out as everyone knows.For example, cut these three operations of operation, fine ginding operation and polishing process through corase grind and process the lens sphere.The required allowance of each operation generally is, is to be to be 10～20 μ m in 30～50 μ m, the polishing in 0.5～2mm, the fine ginding during corase grind is cut.Surface roughness Rmax is, is to be to be 0.01～0.02 μ m in 0.5～4 μ m, the polishing in 6～10 μ m, the fine ginding during corase grind is cut.In addition, corresponding to the distribution of the process time in each operation, select the particle diameter of optimal diamond dish-type grinding stone.Particularly, with as initial grinding process, promptly the corase grind surface roughness of cutting in the operation is a benchmark, determines that distribute the process time of operation after this, the particle diameter of diamond dish-type grinding stone.
In order to reduce surface roughness, as long as reduce the caused revolution mark of diamond dish-type grinding stone, for this reason, as long as make the refinement of adamantine abrasive particle particle diameter.For example, in patent documentation 1 that the applicant proposes, lens grinding apparatus that patent documentation 2 is put down in writing, when adopting granularity is that corase grind that the diamond dish-type grinding stone of #200 (JIS) carries out lens material is when cutting, because the average grain diameter of the abrasive particle of #200 is 74～88 μ m, therefore the degree of depth of revolution mark is set about 70 μ m for, and this 70 μ m is as the allowance in the subsequent fine grinding process.If adopt the diamond dish-type grinding stone of the abrasive particle particle diameter thinner, then can reduce the allowance in the subsequent fine grinding process than #200.For example, can adopt the abrasive particle of #1200 (average grain diameter is 12 μ m) or #1500 (average grain diameter is 10 μ m).But, the cutting speed of the abrasive particle of #1200, #1500 is very slow, is 5 μ m/ seconds, for example, for the lens material corase grind is cut 700 μ m, needs the process time of cost about 140 seconds.
Like this, if the abrasive particle particle diameter of refinement diamond dish-type grinding stone, then process time is elongated naturally.Therefore,, considered surface roughness, allowance and process time in the fine ginding operation, the fine ginding operation has been divided into two operations in the past.In first operation, adopt the metallic bond grinding stone to carry out for example grinding of the allowance of 50 μ m as diamond dish-type grinding stone, in second operation, the polishing of the allowance of the 20 μ m that the resinoid bond grinding stone that adopts thinner abrasive particle particle diameter is left as diamond dish-type grinding stone, by this, realized that allowance is that 70 μ m, surface roughness are for example fine ginding of 0.5 μ m.
At this, in the grinding of spherical lens,, process time can also be shortened if the surface roughness in the sacrifice fine ginding operation then can be carried out fine ginding with single operation.But, because the surface roughness of operation is the allowance that benchmark is determined subsequent handling with early stage, therefore as if the surface roughness of having sacrificed in the fine ginding operation, then can make and increase, and polishing is increased substantially process time as the allowance in the polishing process of subsequent handling.Therefore, can't realize the shortening of process time on the whole.
Therefore, the applicant has proposed a kind of method for grinding in patent documentation 3, and this method for grinding is set corase grind and cut condition so that fine ginding can become single operation.According to this method, the time that can realize the grinding of spherical lens shortens and the rationalization of process management.
Patent documentation 1: the Japan Patent spy opens the 2003-340702 communique
Patent documentation 2: the Japan Patent spy opens the 2007-253279 communique
Patent documentation 3: the Japan Patent spy opens the 2007-253280 communique
Summary of the invention
Technical program of the present invention lies in proposing a kind of diamond dish-type grinding stone, this diamond dish-type grinding stone compared with prior art can carry out the grinding of ormal weight and carry out grinding so that only need less allowance to get final product in the follow-up grinding process with the surface roughness of regulation with the short time.
In addition, technical program of the present invention lies in proposing a kind of passing through and adopt above-mentioned new diamond dish-type grinding stone, can shorten the method for grinding of the spherical lens of grinding time.
For solving technique scheme, the diamond dish-type grinding stone of spherical lens processing usefulness of the present invention is characterised in that to have:
Tool shelf main body, this tool shelf main body comprise the spherical surface auxilliary mutually with the lens sphere of processing object; And
Certain thickness mill material layer, this mill material layer is laminated in above-mentioned spherical surface,
Above-mentioned mill material layer is made of the mill material that disperses, is mixed with diamond abrasive grain in the bond material,
Be extruded with many above-mentioned diamond abrasive grains from the surface of above-mentioned mill material layer,
To implementing advanced study and training are just processed from the outstanding above-mentioned ciamond grinder in the surface of above-mentioned mill material layer, making the maximum overhang of above-mentioned diamond abrasive grain and the difference of minimum overhang is below the setting.
For example, by employing comprise with the identical sphere of lens sphere of processing object to grinding the correction-plate of face, thereby the spherical flour milling of this diamond dish-type grinding stone is implemented advanced study and training are just processed, and can reduce the poor of the maximum overhang of diamond abrasive grain and minimum overhang.By this, the cutting speed of diamond dish-type grinding stone is reduced, thereby the revolution mark that can reduce the grinding face that produced because of this diamond dish-type grinding stone improve the surface accuracy in cutting face.
At this, comparatively it is desirable to, the above-mentioned maximum overhang of above-mentioned diamond abrasive grain and the difference of above-mentioned minimum overhang are in 1/3～1/6 the scope of particle diameter of above-mentioned diamond abrasive grain.
In addition, when the corase grind that is used for spherical lens is cut, the average grain diameter of above-mentioned diamond abrasive grain is controlled to be 149～37 μ m (the general wear particle size of JIS: #100～#400) get final product.
And, above-mentioned mill material layer by on the above-mentioned spherical surface of above-mentioned tool shelf main body that certain thickness diamond particles is bonding with predetermined distance, fixedly form, wherein, diamond abrasive grain disperses in the bond material above-mentioned certain thickness diamond particles by making, mixed mill material constitutes.
Diamond dish-type grinding stone of the present invention is applicable to that the lens sphere to spherical lens carries out grinding.
The method for grinding of spherical lens of the present invention is characterised in that, comprising:
Corase grind is cut operation, thereby this corase grind is cut operation and generated the lens sphere cursorily by adopting above-mentioned diamond dish-type grinding stone that the lens face of the lens material of processing object is roughly ground to cut;
Corase grind after fine ginding operation, this fine ginding operation adopt the fine ginding tool shelf to generation is cut the lens sphere and is carried out fine ginding; And
Polishing process, this polishing process said lens sphere after to fine ginding polishes,
Above-mentioned corase grind is cut in the operation,
Making above-mentioned diamond dish-type grinding stone is the center rotation with the rotation centerline of the centre of sphere that passes above-mentioned spherical surface, and above-mentioned diamond dish-type grinding stone is depicted with the centre of sphere with above-mentioned rotation centerline is that the form of taper seat on summit is carried out centre of sphere swing,
Make the said lens material towards the direction rotation identical on one side with above-mentioned diamond dish-type grinding stone, on one side the said lens material is pressed on above-mentioned diamond dish-type grinding stone,
With this state this lens material is sent on one side, on one side this lens material is implemented spherical grinding processing.
At this, if the average grain diameter of above-mentioned diamond abrasive grain is controlled to be 149～37 μ m (the general wear particle size of JIS: #100～#400), then the allowance in the above-mentioned fine ginding operation can be controlled to be below the 20 μ m.Consequently, can make fine ginding become single grinding process, and can shorten the grinding time, thereby make process management simple.
In diamond dish-type grinding stone of the present invention, the surface of the mill material layer that disperses, be mixed with diamond abrasive grain is implemented advanced study and training are just processed, thereby reduce the poor of the maximum overhang of diamond abrasive grain and minimum overhang.By this, the cutting speed of diamond dish-type grinding stone is reduced, thereby the revolution mark that can reduce the grinding face that produced because of this diamond dish-type grinding stone improve the surface accuracy in cutting face.
In addition,, can use the diamond dish-type grinding stone of the abrasive particle particle diameter that in corase grind is cut, is adopted to cut, simultaneously the surface accuracy that can improve the lens grinding face compared with the past to roughly grind with identical in the past grinding speed according to the method for grinding of spherical lens of the present invention.Therefore,, therefore pass through the single grinding process of the diamond dish-type grinding stone of employing small particle diameter, just can carry out fine ginding at short notice owing in follow-up fine ginding operation, need only less allowance.Consequently, can carry out spherical lens grinding at short notice efficiently by corase grind is cut, fine ginding, polishing processing constitutes.
Description of drawings
Fig. 1 is the process chart of the grinding operation of expression spherical glass lens of the present invention.
Fig. 2 is the summary construction diagram that expression is applicable to the centre of sphere oscillating-type grinding machine that corase grind is cut.
Fig. 3 (a) is the resinoid bond grinding stone of usefulness is cut in expression as corase grind the cutaway view of diamond dish-type grinding stone, Fig. 3 (b) is the local amplification view of this diamond dish-type grinding stone, and Fig. 3 (c) is the local amplification view that is illustrated in the diamond dish-type grinding stone before enforcement is just being processed advanced study and training.
Fig. 4 (a)～Fig. 4 (e) is the key diagram of an example of the preparation method of expression diamond dish-type grinding stone.
(symbol description)
1 centre of sphere oscillating-type grinding attachment
3 lens keepers
4 tool shelves
4a spherical grinding face
The rotation centerline of 4A tool shelf
5 lens main shafts
5A lens rotary middle spindle
20 work lifter structures
21 horizontal arm section
31 centre of sphere pendular bodies
33 support plates
The circular inner peripheral surface of 33a
33b compressed air blows out hole or groove
35 swing width adjustment units
The 36A rotation centerline
37 angle of oscillation adjustment units
The W lens material
The O centre of sphere
60 diamond dish-type grinding stones
61 spherical surface
62 tool shelf main bodys
63 mill material layers
64 bond materials
65 diamond abrasive grains
66 diamond particles (diamond pellet)
71 price fixings
72 spheres
73 pairs are ground thick correction-plate
74 bonding agents
75 pairs are ground smart correction-plate
The maximum overhang of H1
The minimum overhang of H2
Δ H is poor
The specific embodiment
Below, with reference to accompanying drawing, method for grinding and the diamond dish-type grinding stone of using spherical lens of the present invention described.
Fig. 1 is the process chart of the grinding processing method of this routine optical spherical lens of expression.As shown in the drawing, this routine grinding processing method cuts operation ST1, fine ginding operation ST2 by corase grind and these three operations of polishing process ST3 constitute.Corase grind cut operation (CG operation) ST1 be adopt diamond dish-type grinding stone (corase grind is cut tool shelf) thus the lens material of processing object is carried out the operation that grinding generates the lens sphere cursorily.Fine ginding operation ST2 adopts the size ratio corase grind to cut the thin diamond dish-type grinding stone of tool shelf the lens sphere after generating is carried out the operation of fine ginding, is single grinding process.Employed grinding machine is not limited to centre of sphere oscillating-type, can select the grinding machine that adopts general cup type grinding stone for use.In addition, as diamond dish-type grinding stone, also can adopt the resinoid bond grinding stone.Then, polishing process ST3 carries out step of polishing to the lens sphere behind the fine ginding.In this operation, for example utilize polyurethane sheet, the polishing fluid of employing adding cerium oxide etc. carries out the polishing of sphere.
(corase grind is cut operation)
Cut among the operation ST1 at corase grind, on lens material, generate sphere by following condition (1)～(3).
(1) corase grind that adopts centre of sphere oscillating-type grinding attachment to carry out lens material is cut.As centre of sphere swing grinding attachment, can adopt the device of structure as shown in Figure 2.
(2) cut tool shelf as corase grind, use #100～#400 (JIS specification, average grain diameter: the diamond dish-type grinding stone of particle diameter 149～37 μ m).
(3) rotating speed of corase grind being cut tool shelf is made as 2500rpm～3500rpm, for example is made as 3000rpm.
(centre of sphere oscillating-type grinding attachment)
Centre of sphere oscillating-type grinding attachment make grinding face be the corase grind of sphere to cut tool shelf be that the center is rotated with the rotation centerline of the centre of sphere that passes this sphere, and to depict with the centre of sphere with above-mentioned rotation centerline be that the form of taper seat on summit is carried out centre of sphere swing.In addition, lens material is rotated towards cutting the identical direction of tool shelf with corase grind with identical speed, on one side lens material is pressed on corase grind that the rotation and the centre of sphere swinging and cut the grinding face of tool shelf, and with this state this lens material is sent on one side, on one side this lens material is implemented spherical grinding processing.And, utilizing centre of sphere pendular body with the state that can rotate freely corase grind to be cut tool shelf is supported, with the outer peripheral face of centre of sphere pendular body as sphere, be on the bearing-surface of spherical shape at center with above-mentioned outer peripheral face frame at the centre of sphere that corase grind is cut tool shelf with grinding face, thereby make above-mentioned centre of sphere pendular body come-up to supplying with compressed air between these outer peripheral faces and the bearing-surface, and when keeping the come-up state, make above-mentioned centre of sphere pendular body centre of sphere swing.
If be elaborated with reference to Fig. 2, centre of sphere oscillating-type grinding attachment 1 has: lens keeper 3, this lens keeper 3 are used for the lens material W of processing object is kept; And spherical grinding face 4a, this spherical grinding face 4a carries out grinding to the lens material W that remains in lens keeper 3.
Lens main shaft 5 is disposed at the cylindraceous vertical inside that keeps tube 9 of upper end closed with coaxial state, should vertically be kept tube 9 supportings by pair of bearings 10,11 up and down with the state that can rotate freely.In addition, lens main shaft 5 is that lens rotation centerline 5A is the center rotation by axis of lens rotation with the vertical center line that motor 12 is driven into lens main shaft 5.The upper end of vertical maintenance tube 9 links cylinder 13, and this cylinder 13 is fixed in the inside of the supporting cylinder 14 of upper end closed.The vertical tube 9 that keeps is pushed towards the below with the power of regulation by cylinder 13.
Lens main shaft 5 is by 20 liftings of work lifter structure.Work lifter structure 20 comprises horizontal arm section 21, has inserted vertical maintenance tube 9 with coaxial state in the vertical cylinder portion 22 of the front end that is installed on this horizontal arm section 21, and supporting cylinder 14 is fixed in upper surface by horizontal arm section 21.The elevating mechanism of horizontal arm section 21 by comprising threads of lead screw 23, nut 24 and servomotor 25 is along 26 liftings of vertical linearity guide.
At this, on the supporting cylinder 14 that is supported by 13 pairs of lens main shafts 5 of cylinder, noncontacting proximity sensor 27 is installed, this noncontacting proximity sensor 27 is used to detect the vertical upper end 9a that keeps tube 9 of the inboard that is installed on supporting cylinder 14.Generally, this noncontacting proximity sensor 27 is in closed condition, when vertical maintenance tube 9 rises relatively with respect to supporting cylinder 14, utilizes noncontacting proximity sensor 27 to detect the vertical upper end 9a that keeps tube 9, and this sensor output is switched to unlatching.
Then, the workpiece plate 4 that is disposed at the below of lens keeper 3 centre of sphere O that is configured to the spherical grinding face 4a of tool shelf 4 is positioned in the prolongation of lens rotation centerline 5A of lens keeper 3 sides.The back side of this tool shelf 4 is formed with main shaft 4b, and this main shaft 4b is supported with the state that rotates freely by centre of sphere pendular body 31.At this,, the rotation centerline 4A of tool shelf 4 make main shaft 4b by 31 supportings of centre of sphere pendular body so that being the crossing mode of acute angle theta with vertically extending lens rotation centerline 5A on centre of sphere O.
Centre of sphere pendular body 31 comprises: hemispheric cup part 31a; And cylindrical portions may 31b, this cylindrical portions may 31b is outstanding towards the outside of radial direction from the outer peripheral face part at the center, the end of this glass part 31a, with coaxial state the main shaft 4b that can rotate freely is installed in cylindrical portions may 31b.In addition, be extended with flange 31c towards horizontal stroke side from the bottom of cylindrical portions may 31b, and be mounted with the motor 32 that main shaft drives is used at this.
But the circular inner peripheral surface 33a that the cup part 31a of centre of sphere pendular body 31 is formed on support plate 33 is supported with the state of centre of sphere swing.Circular inner peripheral surface 33a is to be the sphere of the centre of sphere with centre of sphere O, and the outer peripheral face 31d of frame on this circular inner peripheral surface 33a is that the cup part 31a of sphere can be the center swing with centre of sphere O.In this example, circular inner peripheral surface 33a is formed with compressed air and blows out hole or groove 33b, supplies with road 33c at this by compressed air and supplies with compressed air.Therefore, cup part 31a is retained from the state of circular inner peripheral surface 33a come-up.Therefore, can make centre of sphere pendular body 31 is that swing glossily at the center with centre of sphere O.
Thereby the lower end of centre of sphere pendular body 31 links by the output shaft that links joint 34 and swing width adjustment unit 35 and motor 36.Centre of sphere pendular body 31 and the point of contact 34a that links joint 34 are positioned on the extended line of tool shelf rotation centerline 4A, and the rotation centerline 36A of motor 36 is to keep towards the state of centre of sphere O all the time.When 35a is handled knob in the adjustment of operation swing width adjustment unit 35, can make the interval variation of the rotation centerline 36A of point of contact 34a and motor 36.Therefore, can adjust the swing width of the oscillating motion of centre of sphere pendular body 31.
Then, motor 36 is by 37 supportings of angle of oscillation adjustment unit.Angle of oscillation adjustment unit 37 comprises the arc cam 38 that is disposed at fixing position, and this cam 38 is for being the circular shape at center with centre of sphere O.With the state mounting support member 39 that can slide along this cam 38, and motor 36 is installed at this.Supporting member 39 is fixed with nut 40, and screwing in the nut 40 has threads of lead screw 41.The end of threads of lead screw 41 and handle 42 link.
If rotary handle 42, then supporting member 39 moves along cam 38.Be center swing ormal weight with centre of sphere O promptly, by the tool shelf main shaft 4b of centre of sphere pendular body 31 supportings.Therefore, can according to angle of oscillation adjustment unit 37 come to the rotation centerline 4A of tool shelf 4 with vertical lens rotation centerline 5A angulation θ, be that oscillation center line angle degree changes.
At this, the controller of using by Numerical Control 50 carries out the driving control of each several part.In addition, controller 50 is connected with input unit 51.By input unit 51, can utilize manual operation to carry out the action that lens material is sent, in addition, can also carry out the setting of cutting output etc.
To be expression cut the cutaway view of diamond dish-type grinding stone of the resinoid bond grinding stone of usefulness as corase grind to Fig. 3 (a), and Fig. 3 (b) is the local amplification view of this diamond dish-type grinding stone of expression.Fig. 3 (c) is illustrated in the local amplification view of enforcement to the diamond dish-type grinding stone before just researching.Diamond dish-type grinding stone shown in Fig. 3 (a), Fig. 3 (b) can be used as and adopts previously described centre of sphere oscillating-type grinding machine to roughly grind tool shelf 4 when cutting.
Diamond dish-type grinding stone 60 has: tool shelf main body 62, this tool shelf main body 62 comprise the spherical surface 61 auxilliary mutually with the lens sphere of processing object; And certain thickness mill material layer 63, this mill material layer 63 is laminated in spherical surface 61.Mill material layer 63 is by the mill material formation of disperseing, being mixed with diamond abrasive grain 65 in bond material 64 with the concentration degree (concentration (concentration)) of regulation.In this example, a certain size diamond particles 66 is bonding with predetermined distance, as to be fixed in spherical surface 61 structure.
Make many diamond abrasive grains 65 outstanding from the surperficial 63a of mill material layer 63 with different overhangs.Shown in Fig. 3 (c), in 66 bonding to diamond particles, fixing process, the difference Δ H of the maximum overhang of diamond particles 65 and minimum overhang is big.In this example, to implementing advanced study and training are just processed from the outstanding diamond abrasive grain 65 of the surperficial 63a of mill material layer 63.By this, the fore-end of the outstanding side of a part of diamond abrasive grain 65 being polished, is below the setting thereby make the maximum overhang H1 of diamond abrasive grain 65 and the difference Δ H of minimum overhang H2.For example, making the difference Δ H of the maximum overhang H1 of diamond abrasive grain 65 and minimum overhang H2 is in 1/3～1/6 the scope of average grain diameter of diamond abrasive grain.
Then, Fig. 4 (a)～Fig. 4 (e) is the key diagram of an example of the preparation method of expression diamond dish-type grinding stone.The preparation method of diamond dish-type grinding stone forms operation (Fig. 4 (a), Fig. 4 (b)) by mill material layer and constitutes researching positive operation (Fig. 4 (c)～Fig. 4 (e)).
Form in the operation at mill material layer, be formed with mill material layer on the spherical surface of the tool shelf main body that comprises the spherical surface of assisting mutually with the lens sphere of processing object, this mill material layer will disperse, be mixed with diamond abrasive grain in the bond material mill material is laminated with certain thickness.For example, making comprises that the sphere precision (Δ h) with respect to the lens sphere of processing object is the price fixing 71 (Fig. 4 (a)) of the sphere of 0.002 μ m～0.005 μ m.Then, by certain thickness diamond particles 66 of stickup such as pastes, this diamond particles 66 makes diamond abrasive grain disperse, mix in the bond material on the sphere 72 of price fixing 71.Each surperficial coating adhesive 74 to the diamond particles 66 after pasting.Then, the diamond particles 66 that is pasted on sphere 72 is pressed on the spherical surface 61 of tool shelf main body 62 respectively by bonding agent 74, and keep this pressed state to bonding agent and solidify.After bonding agent solidifies, by pulling down price fixing 71, thereby can obtain tool shelf main body 62, this tool shelf main body 62 forms the mill material layer 63 (Fig. 4 (b)) that is made of diamond particles 66 on spherical surface 61.Fig. 3 (c) amplifies the figure of back expression with formed mill material layer 63.
Under connecing to researching in the positive operation, employing comprise corresponding to the lens sphere of processing object spherical to grind face come the surface of the mill material layer of tool shelf main body is implemented advanced study and training are just processed to grinding correction-plate, thereby will be controlled to be below the setting from the maximum overhang and the minimum overhang of the outstanding diamond abrasive grain of mill material laminar surface.For example, constitute by thick correction operation and the positive operation of refine researching positive operation.
Revise in the operation thick, adopt and implement advanced study and training just (Fig. 4 (c)) grinding surface that thick correction-plate 73 grinds material layer 63 with the abrasive particle butt of regulation particle diameter.For example, on one side the abrasive particle (siliceous class removing material) of butt GC# 240 just carry out on one side advanced study and training.
In the positive operation of refine, add entry the surface of thick revised mill material layer 63 is implemented grinding refine just (Fig. 4 (d), Fig. 4 (e)) grinding 75 of smart correction-plates while adopt.For example, thus adopt the material processed of can quenching such as S45C to make and quench grinding smart correction-plate 75.Owing to can deform after quenching, after therefore will quenching to grinding that smart correction-plate 75 is implemented correction with respect to the lens sphere of processing object so that spherical be 0.002 μ m～0.005 μ m to the sphere precision (Δ h) of grinding face.Adopt resulting thus to grinding smart correction-plate 75.Fig. 3 (b) amplifies the figure of back expression with revised mill material layer 63.
(action effect)
Adopt the diamond dish-type grinding stone of making as mentioned above 60, the corase grind that adopts swing grinding attachment 1 shown in Figure 2 to carry out spherical lens is cut.Consequently, even if use the diamond dish-type grinding stone 60 of #100～#400, the revolution mark of lens grinding face is near the 10 μ m.In addition, the cutting speed of the lens material (BK7, φ 30) that is made of Pyrex was 20 μ m/ seconds, can be with about 35 seconds processing 700 μ m cutting outputs.In addition, can confirm wearing and tearing are reduced, the reduction of the surface accuracy of grinding face is reduced because particle diameter is big.
And in follow-up fine ginding operation, affirmation can be controlled to be allowance about about 10 μ m, and only need adopt single fine ginding operations such as resinoid bond grinding stone to get final product.Therefore, compare, confirm as a whole with existing spherical lens method for grinding, can be with the short grinding time, efficiently spherical lens is carried out grinding.
Claims (7)
1. a spherical lens is processed the diamond dish-type grinding stone of usefulness, it is characterized in that having:
Tool shelf main body, this tool shelf main body have the spherical surface auxilliary mutually with the lens sphere of processing object; And
Certain thickness mill material layer, this mill material layer is laminated in described spherical surface,
Described mill material layer is made of the mill material that disperses, is mixed with diamond abrasive grain in the bond material,
Be extruded with many described diamond abrasive grains from the surface of described mill material layer,
To implementing advanced study and training are just processed from the outstanding described ciamond grinder in the surface of described mill material layer, making the maximum overhang of described diamond abrasive grain and the difference of minimum overhang is below the setting.
2. diamond dish-type grinding stone as claimed in claim 1 is characterized in that, the described maximum overhang of described diamond abrasive grain and the difference of described minimum overhang are in 1/3～1/6 the scope of particle diameter of described diamond abrasive grain.
3. diamond dish-type grinding stone as claimed in claim 2 is characterized in that, the average grain diameter of described diamond abrasive grain is 149～37 μ m (the general wear particle size of JIS: #100～#400).
4. diamond dish-type grinding stone as claimed in claim 3, it is characterized in that, described mill material layer by on the described spherical surface of described tool shelf main body that certain thickness diamond particles is bonding with predetermined distance, fixedly form, wherein, diamond abrasive grain disperses in the bond material described certain thickness diamond particles by making, mixed mill material constitutes.
5. the method for grinding of a spherical lens is characterized in that, each described diamond dish-type grinding stone carries out grinding to the lens sphere of spherical lens in the employing claim 1 to 4.
6. the method for grinding of spherical lens as claimed in claim 5 is characterized in that, comprising:
Corase grind is cut operation, thereby this corase grind is cut operation and generated the lens sphere cursorily by adopting described diamond dish-type grinding stone that the lens face of the lens material of processing object is roughly ground to cut;
Corase grind after fine ginding operation, this fine ginding operation adopt the fine ginding tool shelf to generation is cut the lens sphere and is carried out fine ginding; And
Polishing process, this polishing process described lens sphere after to fine ginding polishes,
Described corase grind is cut in the operation,
Making described diamond dish-type grinding stone is the center rotation with the rotation centerline of the centre of sphere that passes described spherical surface, and described diamond dish-type grinding stone is depicted with the described centre of sphere with described rotation centerline is that the form of the taper seat on summit is carried out centre of sphere swing,
Make described lens material towards the direction rotation identical on one side with described diamond dish-type grinding stone, on one side described lens material is pressed on described diamond dish-type grinding stone,
With this state described lens material is sent on one side, on one side this lens material is implemented spherical grinding processing.
7. the method for grinding of spherical lens as claimed in claim 6 is characterized in that,
With the average grain diameter of described diamond abrasive grain be controlled to be 149～37 μ m (the general wear particle size of JIS: #100～#400),
Allowance in the described fine ginding operation is controlled to be below the 20 μ m,
Make described fine ginding operation become single grinding process.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010111075A JP2011235424A (en) | 2010-05-13 | 2010-05-13 | Dish-shaped diamond grindstone and method for grinding spherical lens |
| JP2010-111075 | 2010-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102240989A true CN102240989A (en) | 2011-11-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102340315A Pending CN102240989A (en) | 2010-05-13 | 2010-07-12 | Diamond disc type grinding stone and grinding method of spherical lens |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2011235424A (en) |
| KR (1) | KR20110125568A (en) |
| CN (1) | CN102240989A (en) |
| TW (1) | TW201139050A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107405755A (en) * | 2015-12-10 | 2017-11-28 | 联合材料公司 | Super-abrasive grinding wheel |
| CN109693147A (en) * | 2019-01-24 | 2019-04-30 | 泉州市友腾光电科技有限公司 | A kind of ZNSE lenses polishing technique |
| CN111048122A (en) * | 2013-09-30 | 2020-04-21 | Hoya株式会社 | Fixed abrasive grain grinding stone and method for manufacturing substrate |
| CN114918782A (en) * | 2022-07-22 | 2022-08-19 | 诸城市迪瑞汽车科技有限公司 | Polishing and grinding device for machining convex lens of car lamp |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101372782B1 (en) * | 2012-05-21 | 2014-03-10 | 셰플러코리아(유) | Grinding apparatus for bearing race |
| CN103659577B (en) * | 2013-12-05 | 2016-05-25 | 南京航空航天大学 | Sphere workpiece is concretion abrasive pad and preparation method for grinding and polishing |
| JP2019000957A (en) * | 2017-06-16 | 2019-01-10 | 株式会社春近精密 | Lens polishing device and lens polishing method |
| JP7126965B2 (en) * | 2019-02-27 | 2022-08-29 | 株式会社ノリタケカンパニーリミテド | Glass filler containing metal bond grindstone |
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- 2010-05-13 JP JP2010111075A patent/JP2011235424A/en active Pending
- 2010-06-24 TW TW099120655A patent/TW201139050A/en unknown
- 2010-07-02 KR KR1020100063698A patent/KR20110125568A/en not_active Application Discontinuation
- 2010-07-12 CN CN2010102340315A patent/CN102240989A/en active Pending
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| US20040058062A1 (en) * | 2001-01-16 | 2004-03-25 | Masami Masuko | Whetstone pellet, whetstone, processes for producing them, process for producing optical element using whetstone, and process for producing exposure apparatus |
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| CN111048122A (en) * | 2013-09-30 | 2020-04-21 | Hoya株式会社 | Fixed abrasive grain grinding stone and method for manufacturing substrate |
| CN111048122B (en) * | 2013-09-30 | 2021-08-03 | Hoya株式会社 | Fixed abrasive grain grinding stone and method for manufacturing substrate |
| CN107405755A (en) * | 2015-12-10 | 2017-11-28 | 联合材料公司 | Super-abrasive grinding wheel |
| US10307888B2 (en) | 2015-12-10 | 2019-06-04 | A.L.M.T. Corp. | Superabrasive wheel |
| CN109693147A (en) * | 2019-01-24 | 2019-04-30 | 泉州市友腾光电科技有限公司 | A kind of ZNSE lenses polishing technique |
| CN114918782A (en) * | 2022-07-22 | 2022-08-19 | 诸城市迪瑞汽车科技有限公司 | Polishing and grinding device for machining convex lens of car lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011235424A (en) | 2011-11-24 |
| KR20110125568A (en) | 2011-11-21 |
| TW201139050A (en) | 2011-11-16 |
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