CN109531848A - Eyeglass trimming positioning device - Google Patents
Eyeglass trimming positioning device Download PDFInfo
- Publication number
- CN109531848A CN109531848A CN201811614053.7A CN201811614053A CN109531848A CN 109531848 A CN109531848 A CN 109531848A CN 201811614053 A CN201811614053 A CN 201811614053A CN 109531848 A CN109531848 A CN 109531848A
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- Prior art keywords
- compact heap
- loaded
- unit
- plane
- block
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
- B28D7/04—Accessories specially adapted for use with machines or devices of the preceding groups for supporting or holding work or conveying or discharging work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
- B26D7/01—Means for holding or positioning work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/22—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by cutting, e.g. incising
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Jigs For Machine Tools (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The invention discloses a kind of eyeglass trimming positioning devices, comprising: be loaded unit, and the unit that is loaded is used for clamping workpiece；Fixed cell, fixed cell are connect with the unit activity that is loaded, at least one plane of unit that is loaded and fixed cell are plane-plane contact.Fixed cell includes mounting seat and holds down assembly, and holds down assembly and is arranged in mounting seat；It holds down assembly including the first compact heap and the second compact heap, the unit that is loaded is in contact with the first compact heap and the second compact heap.The unit that is loaded includes installation base body and fixed block, and installation base body is movably arranged on fixed cell, and fixed block is arranged in installation base body；The accommodating cavity for accommodating workpiece is provided in fixed block.Through the above way, the datum level when present invention guarantees each trimming during multiple trimming, by being loaded unit with the plane-plane contact of fixed cell is consistent, the eyeglass workpiece suitable for any shape, it is applied widely, the machining accuracy of multiple trimming can be effectively improved.
Description
Technical field
The present invention relates to machining eyeglass technical fields, more particularly to a kind of eyeglass trimming positioning device.
Background technique
Generally to the optical process of eyeglass trimming class, generally use that bonding is cured to be bonded to one eyeglass and graphite etc.
Carry out simple grain processing；Either multiple eyeglasses are bonded on graphite or other materials with cured or pitch, then are bonded in a deep bid
On, the processing of trimming is then carried out, the processes such as lower wall and cleaning are carried out to eyeglass workpiece again after last.
The bonding of traditional eyeglass trimming device, either single still generally cannot be once cutting at the bonding of disk
Type requires repeatedly to do over again, and is difficult to ensure that each precision is all consistent during multiple trimming.It is especially round or
Ellipse etc. has the eyeglass of cambered surface, due to there is the often contact of point with face in bonding of the eyeglass of cambered surface, utilizes traditional mirror
Piece trimming device trimming scale error is bigger, reduces the precision of eyeglass trimming.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of eyeglass trimming positioning devices, can be suitable for any shape
Eyeglass workpiece, it is applied widely, the machining accuracy of multiple trimming can be effectively improved.
In order to achieve the above objectives, the technical solution adopted by the present invention to solve the technical problems is:
A kind of eyeglass trimming positioning device, comprising:
Be loaded unit, and the unit that is loaded is for clamping workpiece；
Fixed cell, the fixed cell are connect with the unit activity that is loaded, it is described be loaded at least one plane of unit with
Fixed cell is plane-plane contact, and the unit that is loaded is parallel to workpiece at least one face in the face of fixed cell plane-plane contact
Trimming machined surface.
Preferably, the unit that is loaded includes installation base body and fixed block, and the installation base body is movably arranged on described solid
In order member, the fixed block is arranged in the installation base body；The accommodating cavity for accommodating workpiece is provided in the fixed block；
The fixed block is provided with the first fixing end and the second fixing end, the contact of first fixing end and the second fixing end with workpiece
Face is inclined-plane, and first fixing end and the second fixing end cooperate the active force that can apply to workpiece obliquely jointly.
Preferably, the unit that is loaded further includes gripping block, the second positioning pin and fastener；The gripping block is arranged in institute
It states in the accommodating cavity of fixed block, the contact surface of the gripping block and workpiece is inclined-plane, and the gripping block can apply oblique to workpiece
Upward active force；The gripping block is connected on the fixed block by the second positioning pin, and the gripping block can be around second
Positioning pin rotation；The fastener passes through fixed block and connect with the gripping block, and the fastener is threadedly coupled with fixed block.
Preferably, the unit that is loaded further includes reset spring, and the reset spring is arranged in the gripping block and fixation
Between block.
Preferably, the installation base body includes the first supporter and the second supporter, first supporter and second
Support body is mutually perpendicular to and is fixedly connected；Through-hole is provided on first supporter, second supporter fits with workpiece.
Preferably, the fixed cell includes mounting seat and holds down assembly, and described hold down assembly is arranged in the installation
On pedestal；Described to hold down assembly including the first compact heap and the second compact heap, the unit setting that is loaded is compressed described first
Between block and the second compact heap, the unit that is loaded is in contact with first compact heap and the second compact heap.
Preferably, first compact heap is fixed in the mounting seat, and second compact heap can be opposite
It moves to change the distance between the second compact heap and the first compact heap in the first compact heap.
Preferably, the fixed cell further includes supporting block, and the supporting block is arranged in the mounting seat；Described
Two compact heaps are connected in the supporting block by the first positioning pin, and second compact heap can be rotated around the first positioning pin.
Preferably, it is arranged on second compact heap fluted；The fixed cell further includes compression bar, and the one of the compression bar
In the groove that second compact heap is arranged in compression bar seat, the compression bar is threadedly coupled with compression bar seat at end；The compression bar seat
It is fixedly connected with mounting seat.
Preferably, the fixed cell includes mounting seat and holds down assembly, and described hold down assembly is arranged in the installation
On pedestal；The unit that is loaded includes installation base body and fixed block, and the installation base body is movably arranged on the fixed cell,
The fixed block is arranged in the installation base body；The upper surface of the mounting seat is set as plane, the installation base body
Bottom surface is set as plane, and the installation base body and mounting seat are plane-plane contact.
Preferably, connector is provided in the mounting seat, the bottom of mounting seat is arranged in the connector, described
Connector is set as coaxially connected with mounting seat.
Due to the application of the above technical scheme, the present invention have compared with prior art it is following the utility model has the advantages that
Provide a kind of eyeglass trimming positioning device, during multiple trimming, without by eyeglass workpiece from the list that is loaded
It is taken off in member, eyeglass workpiece remains loaded into be loaded in unit and completes repeatedly measurement and process with trimming, passes through the unit and solid of being loaded
The datum level when plane-plane contact of order member guarantees each trimming is consistent, and plane-plane contact makes fixed cell to the unit that is loaded
Fixation is more firm, applied widely suitable for the eyeglass workpiece of any shape, can effectively improve the processing essence of multiple trimming
Degree.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of eyeglass trimming positioning device of the present invention.
Fig. 2 is the structural schematic diagram of unit of being loaded in eyeglass trimming positioning device of the present invention.
Fig. 3 is the schematic diagram measured using measuring head to eyeglass workpiece.
Fig. 4 is the schematic diagram that eyeglass trimming positioning device of the present invention is connect with milling-grinding equipment.
Detailed description of the invention:
1 workpiece；
21 mounting seats, 22 supporting blocks, 231 first compact heaps, 232 second compact heaps, 2321 grooves, 24 first positioning
Pin, 25 compression bars, 26 compression bar seats, 27 connectors；
31 installation base bodies, 311 first supporters, 312 second supporters, 32 fixed blocks, 321 first fixing ends, 322 second
Fixing end, 33 gripping blocks, 34 second positioning pins, 35 fasteners, 36 reset springs；
4 measuring heads；
51 milling heads, 52 fixing seats.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Refering to attached drawing, a kind of eyeglass trimming positioning device, comprising: for clamping workpiece 1 be loaded unit and be loaded
The fixed cell of unit activity connection, at least one plane of unit that is loaded and fixed cell are plane-plane contact.
Camera lens workpiece 1 has the back side, and there are one piece of plane or concave surface in front and outer diameter, the back side for the unit that is loaded, and be loaded unit
It is mutually in close contact with the external diameter surface of workpiece 1.Be loaded unit contact face at least one face be parallel to work 1 trimming
Machined surface, and the workpiece 1 processed is limited by the unit that is loaded, the design for the unit that is loaded carries out the workpiece 1 in the module
Active alignment.Therefore, the processing of the edge of work can achieve repeatable precision and repeatable alignment.
Fixed cell includes mounting seat 21 and holds down assembly, and holds down assembly and is arranged in mounting seat 21.It holds down assembly
Including the first compact heap 231 and the second compact heap 232, the unit that is loaded setting the first compact heap 231 and the second compact heap 232 it
Between, the unit that is loaded is in contact with the first compact heap 231 and the second compact heap 232.
First compact heap 231 is fixed in mounting seat 21, and the second compact heap 232 can be relative to the first compact heap
231 movements are to change the distance between the second compact heap 232 and the first compact heap 231.For example, being provided in mounting seat 21
Sliding rail, the second compact heap 232 can slide on the slide rail, with this come realize change the second compact heap 232 and the first compact heap 231 it
Between distance；Locating piece can also be set, pass through locating piece after the second compact heap 232 slides into suitable position on the slide rail
It is fixed.
Second compact heap 232 can relative to the first compact heap 231 movement and also be accomplished by the following way: it is fixed
Unit further includes supporting block 22, and supporting block 22 is arranged in mounting seat 21.Second compact heap 232 is connected by the first positioning pin 24
It connects in supporting block 22, and the second compact heap 232 can be rotated around the first positioning pin 24.
The lower part setting fluted 2321 of second compact heap 232.Fixed cell further includes compression bar 25, and one end of compression bar 25 is worn
Over-voltage pole socket 26 is movably arranged in the groove 2321 of the second compact heap 232, and compression bar 25 and the second compact heap 232 are inconsistent.Pressure
Bar 25 is threadedly coupled with compression bar seat 26, and compression bar 25 herein is equivalent to screw rod.Compression bar seat 26 is fixedly connected with mounting seat 21, pressure
Pole socket 26 had not only played the role of compression column with fixed 25, but also played guiding role to compression bar 25.When compression bar 25 is to close to eyeglass workpiece 1
When direction screws out, the lower part of the second compact heap 232 is moved to the direction far from eyeglass workpiece 1, the top of the second compact heap 232 to
It is moved close to the direction of eyeglass workpiece 1, realization is fixed the unit that is loaded.Even if here without the first positioning pin 24,
The second compact heap 232 can also be rotated when 25 spinning in and out of compression bar with central shaft, and after being provided with the first positioning pin 24, second is compressed
Block 232 can be axis rotation with the first positioning pin 24, and secure the second compact heap 232 by the first positioning pin 24.
The unit that is loaded includes installation base body 31 and fixed block 32, and installation base body 31 is movably arranged on fixed cell, fixed
Block 32 is arranged in installation base body 31.The accommodating cavity for accommodating workpiece 1 is provided in fixed block 32.Fixed block 32 is provided with first
The contact surface of fixing end 321 and the second fixing end 322, the first fixing end 321 and the second fixing end 322 and workpiece 1 is inclined-plane, this
In two inclined-planes combine and see and be similar to " eight " word, the first fixing end 321 and the second fixing end 322 can apply to workpiece 1
Active force obliquely.
The unit that is loaded further includes gripping block 33, the second positioning pin 34 and fastener 35.Gripping block 33 is arranged in fixed block 32
Accommodating cavity in, the contact surface of gripping block 33 and workpiece 1 is inclined-plane, and two inclined-planes here, which combine, to be seen and be similar to down
" eight " word, gripping block 33 can apply active force obliquely to workpiece 1.Gripping block 33 is supported eyeglass workpiece 1, and presss from both sides
The outer rim of tight block 33 is adapted with the inner edge of the first compact heap 231 and the second compact heap 232, can carry out resetting use.
Gripping block 33 is connected on fixed block 32 by the second positioning pin 34, and gripping block 33 can be revolved around the second positioning pin 34
Turn.Fastener 35 passes through fixed block 32 and connect with gripping block 33, and fastener 35 is threadedly coupled with fixed block 32, and fastener 35 can be with
It is screw, screw rod etc..According to the true form of eyeglass workpiece 1, enable grip block tight by the spinning in and out of fastener 35
Close to eyeglass workpiece 1, it is applicable in eyeglass workpiece 1 of different shapes.
Reset spring 36 is provided between gripping block 33 and fixed block 32, reset spring 36 is located at the top of fastener 35,
Fastener 35 is between reset spring 36 and installation base body 31 in other words.Reset spring 36 is used in 35 spinning in and out of fastener
When, grip block can be only bonded with eyeglass workpiece 1, and after taking out eyeglass workpiece 1, fastener 35 can automatically reset again.
Installation base body 31 can use stainless steel material, and installation base body 31 includes the first supporter 311 and the second supporter
312, the first supporter 311 and the second supporter 312 are mutually perpendicular to, i.e., set L shape for installation base body 31.First supporter
311 are used to support fixed block 32, are provided with through-hole on the first supporter 311, which can be used for accommodating other measuring devices,
So that measurement when eyeglass workpiece 1 is loaded in unit to 1 size of eyeglass workpiece, convenient for the monitoring to trimming size.Second
For cooperating fixing len, the second supporter 312 fits supporter 312 with workpiece 1, in order to easy to operate, the second supporter
312 another side can also be bonded with supporting block 22, so that the unit that is entirely loaded is fixed more firm, so that eyeglass workpiece
1 fixes more firm.
According to actual needs, supporting block 22 can be arranged to the cylinder that horizontal cross-section is polygon, can propped up in this way
Each side setting of bracer 22 is pressed card unit, compact heap, compression bar 25 etc., realizes the trimming processing of multistation, mentions significantly
The efficiency of high trimming processing.
When in order to guarantee that each eyeglass workpiece 1 carries out trimming again after a measurement, datum level when each trimming is consistent, from
And guarantee the trimming precision of eyeglass workpiece 1, plane, the upper surface setting of mounting seat 21 are set by the bottom surface of installation base body 31
For plane, installation base body 31 and mounting seat 21 are plane-plane contact.
For the preferably fixed unit that is loaded, the contact surface of the first compact heap 231 and the second compact heap 232 and fixed block 32
It can be set to inclined-plane, so that the first compact heap 231 and the second compact heap 232 apply downward active force to fixed block 32, pressure
Block 32 is fastened, so that the unit that is loaded is fixed more stable.
The eyeglass trimming positioning device can be connected on milling-grinding equipment by connector 27, and connector 27 can be set
The bottom of mounting seat 21, connector are set as coaxially connected with mounting seat, i.e., the vertical axis of connector and peace turn pedestal
Vertical axis be overlapped.Connector 27 in the fixing seat 52 of milling-grinding equipment, pacifies mounting seat 21 in mounting seat 21
Be loaded unit, compact heap, compression bar 25 etc., and carries out the installation of multi-panel on supporter as needed, and Fig. 1 show progress
Two sides installation.
Eyeglass workpiece 1 is placed on fixed block 32, and grip block can be that the center of circle is rotated around the second positioning pin 34, is clamped
Block rotates around the second positioning pin 34 under the action of fastener 35, carries out compression movement, the compression on two sides to eyeglass workpiece 1
Afterwards, eyeglass workpiece 1 is installed being loaded in unit.This unit that is loaded can carry out multiple small lots together and be loaded, to save
Time.
The unit that is loaded pushes the second compact heap 232 to rotate around the first positioning pin 24 by the helical rotation of compression bar 25, from
And the movement clamped is realized to the unit that is loaded.Under the action of milling head 51, the cylinder of eyeglass workpiece 1 is processed.Processing
After complete, without removing eyeglass workpiece 1, the unit that is loaded equipped with eyeglass workpiece 1 directly removed, (thousand points of the height of measuring head 4 is passed through
Ruler) processing dimension of eyeglass workpiece 1 is measured.If accurate to dimension requires, continue batch machining；If not meeting processing
Size requirement, the milling process of milling head 51 is adjusted according to the result of measurement, and the unit that is loaded equipped with eyeglass workpiece 1 is pacified again
It is attached on fixed cell, continues milling trimming until accurate to dimension requirement.
The above is only the embodiment of the present invention, are not intended to limit the scope of the invention, all to be said using the present invention
Equivalent structure or equivalent flow shift made by bright book and accompanying drawing content is applied directly or indirectly in other relevant technology necks
Domain is included within the scope of the present invention.
Claims (11)
1. eyeglass trimming positioning device characterized by comprising
Be loaded unit, and the unit that is loaded is for clamping workpiece；
Fixed cell, the fixed cell are connect with the unit activity that is loaded, be loaded at least one plane of unit and the fixation
Unit is plane-plane contact, and the unit that is loaded is parallel to cutting for workpiece at least one face in the face of fixed cell plane-plane contact
Side machined surface.
2. eyeglass trimming positioning device according to claim 1, it is characterised in that: the unit that is loaded includes installation base body
And fixed block, the installation base body are movably arranged on the fixed cell, the fixed block is arranged in the installation base body；
The accommodating cavity for accommodating workpiece is provided in the fixed block；The fixed block is provided with the first fixing end and the second fixing end,
The contact surface of first fixing end and the second fixing end and workpiece is inclined-plane, and first fixing end and the second fixing end are common
Cooperation can apply active force obliquely to workpiece.
3. eyeglass trimming positioning device according to claim 2, it is characterised in that: the unit that is loaded further includes clamping
Block, the second positioning pin and fastener；The gripping block is arranged in the accommodating cavity of the fixed block, the gripping block and workpiece
Contact surface be inclined-plane, the gripping block can apply active force obliquely to workpiece；The gripping block passes through the second positioning pin
It is connected on the fixed block, and the gripping block can be rotated around the second positioning pin；The fastener pass through fixed block with it is described
Gripping block connection, the fastener are threadedly coupled with fixed block.
4. eyeglass trimming positioning device according to claim 3, it is characterised in that: the unit that is loaded further includes resetting bullet
Spring, the reset spring are arranged between the gripping block and fixed block.
5. eyeglass trimming positioning device according to claim 2, it is characterised in that: the installation base body includes the first support
Body and the second supporter, first supporter and the second supporter are mutually perpendicular to and are fixedly connected；On first supporter
It is provided with through-hole, second supporter fits with workpiece.
6. eyeglass trimming positioning device according to claim 1, it is characterised in that: the fixed cell includes mounting seat
With hold down assembly, it is described hold down assembly be arranged in the mounting seat；It is described to hold down assembly including the first compact heap and second
Compact heap, the unit that is loaded are arranged between first compact heap and the second compact heap, be loaded unit and described the
One compact heap and the second compact heap are in contact.
7. eyeglass trimming positioning device according to claim 6, it is characterised in that: first compact heap is fixed at
In the mounting seat, second compact heap can move to change the second compact heap and first relative to the first compact heap
The distance between compact heap.
8. eyeglass trimming positioning device according to claim 6, it is characterised in that: the fixed cell further includes support
Block, the supporting block are arranged in the mounting seat；Second compact heap is connected to the support by the first positioning pin
On block, and second compact heap can be rotated around the first positioning pin.
9. eyeglass trimming positioning device according to claim 6, it is characterised in that: be provided on second compact heap recessed
Slot；The fixed cell further includes compression bar, and one end of the compression bar passes through the groove that second compact heap is arranged in compression bar seat
Interior, the compression bar is threadedly coupled with compression bar seat；The compression bar seat is fixedly connected with mounting seat.
10. eyeglass trimming positioning device according to claim 1, it is characterised in that: the fixed cell includes installation bottom
Seat and hold down assembly, it is described hold down assembly be arranged in the mounting seat；The unit that is loaded includes installation base body and fixation
Block, the installation base body are movably arranged on the fixed cell, and the fixed block is arranged in the installation base body；The peace
The upper surface of dress pedestal is set as plane, and the bottom surface of the installation base body is set as plane, the installation base body and mounting seat
For plane-plane contact.
11. eyeglass trimming positioning device according to claim 10, it is characterised in that: the company of being provided in the mounting seat
The bottom of mounting seat is arranged in connector, the connector, and the connector is set as coaxially connected with mounting seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811614053.7A CN109531848B (en) | 2018-12-27 | 2018-12-27 | Lens edge cutting positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811614053.7A CN109531848B (en) | 2018-12-27 | 2018-12-27 | Lens edge cutting positioning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109531848A true CN109531848A (en) | 2019-03-29 |
| CN109531848B CN109531848B (en) | 2020-05-08 |
Family
ID=65857322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811614053.7A Active CN109531848B (en) | 2018-12-27 | 2018-12-27 | Lens edge cutting positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109531848B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200957503Y (en) * | 2006-08-31 | 2007-10-10 | 如东县宇迪光学仪器厂有限公司 | Fixed-centering edged clamp of small-diameter lens |
| JP2008087086A (en) * | 2006-09-29 | 2008-04-17 | Nippon Zeon Co Ltd | Single layer sheet for fixing lens |
| CN207267202U (en) * | 2017-09-01 | 2018-04-24 | 贰陆光学（苏州）有限公司 | A kind of eyeglass trimming device |
| CN108161642A (en) * | 2017-12-26 | 2018-06-15 | 湖北腾胜光电科技股份有限公司 | A kind of edging mechanism for processing spherical mirror |
| CN208196602U (en) * | 2018-05-04 | 2018-12-07 | 广东金鼎光学技术股份有限公司 | Centering jig for eyeglass automatic bonding |
-
2018
- 2018-12-27 CN CN201811614053.7A patent/CN109531848B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200957503Y (en) * | 2006-08-31 | 2007-10-10 | 如东县宇迪光学仪器厂有限公司 | Fixed-centering edged clamp of small-diameter lens |
| JP2008087086A (en) * | 2006-09-29 | 2008-04-17 | Nippon Zeon Co Ltd | Single layer sheet for fixing lens |
| CN207267202U (en) * | 2017-09-01 | 2018-04-24 | 贰陆光学（苏州）有限公司 | A kind of eyeglass trimming device |
| CN108161642A (en) * | 2017-12-26 | 2018-06-15 | 湖北腾胜光电科技股份有限公司 | A kind of edging mechanism for processing spherical mirror |
| CN208196602U (en) * | 2018-05-04 | 2018-12-07 | 广东金鼎光学技术股份有限公司 | Centering jig for eyeglass automatic bonding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109531848B (en) | 2020-05-08 |
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