CN108793708A - A kind of processing method of curved surface mobile phone glass back shroud - Google Patents
A kind of processing method of curved surface mobile phone glass back shroud Download PDFInfo
- Publication number
- CN108793708A CN108793708A CN201810883214.6A CN201810883214A CN108793708A CN 108793708 A CN108793708 A CN 108793708A CN 201810883214 A CN201810883214 A CN 201810883214A CN 108793708 A CN108793708 A CN 108793708A
- Authority
- CN
- China
- Prior art keywords
- tempering
- curved surface
- mobile phone
- processing method
- back shroud
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B11/00—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto
- B08B11/04—Cleaning flexible or delicate articles by methods or apparatus specially adapted thereto specially adapted for plate glass, e.g. prior to manufacture of windshields
-
- 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
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/02—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of fluid, sprayed, pulverised, or liquefied grinding, polishing or lapping agents
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Surface Treatment Of Glass (AREA)
Abstract
The present invention relates to a kind of processing methods of curved surface mobile phone glass back shroud comprising following steps：The first step, sawing sheet, cover board is obtained using break bar glass-cutting raw material, thickness is selected to carry out sawing sheet in 1.5 to 1.8mm glass raw material, second step, CNC processing, process the cover board surrounding in the bistrique grinding first step, surrounding processes big radian curved surface in cover board top surface using CNC, the width of big radian curved surface is in 15 mm between 20 mm, third step clears off, the 4th step, tempering, is cleaned after the 5th step, tempering.
Description
Technical field
The present invention relates to a kind of processing methods of mobile phone glass back shroud, particularly relate to a kind of to curved surface mobile phone glass rear cover
The processing method of plate.
Background technology
Constantly bringing forth new ideas and develop development with smart mobile phone technology, many top grade mobile phones start by metal back cover, plastics
Rear cover, ceramic rear cover turn to and use glass back cover, and mobile phone glass rear cover is one of core component of mobile phone, is assemblied in mobile phone
The back side, to realize the function of newly increasing of mobile phone, such as wireless charging function.
It is stamped special bionical radian design after mobile phone glass, good gripping feel, the thickening to edge may be implemented
Processing, the intensity that glass back cover may be implemented is high, is not easy to break into pieces, and using the increase of integral thickness, good dissipate may be implemented
It is hot, due to being glass material, can arbitrary locating cellphone aerial position, and wireless charging may be implemented, in addition glass
The appearance of rear cover can assemble beautiful and colorful mobile phone by silk-screen and NCVM techniques, can be obviously improved mobile phone production
The overall beautiful effect and texture of product, but it is constrained to the limitation of production technology, the mobile phone glass back shroud occurred at present is all
Only there is smaller radian, it is limited to the effect promoting of mobile phone, and this is the major defect for traditional technology.
Invention content
The present invention provides a kind of processing method of curved surface mobile phone glass back shroud, can process the mobile phone glass of large curved surface
Glass rear cover panel products, and this is for the main object of the present invention.
The technical solution adopted in the present invention is：A kind of processing method of curved surface mobile phone glass back shroud comprising as follows
Step：The first step, sawing sheet obtain cover board using break bar glass-cutting raw material, select glass raw material of the thickness 1.5 to 1.8mm
Sawing sheet is carried out, cover board length and width dimensions 0.3 mm bigger than cover board actual size that sawing sheet obtains selects the diamond cutter of 360 to 370 teeth
Wheel is cut, and scribe-wheel angle selects 130 degree.
Second step, CNC processing, process the cover board surrounding in the bistrique grinding first step, surrounding adds in cover board top surface using CNC
Work goes out big radian curved surface, and for the width of big radian curved surface in 15 mm between 20 mm, it includes corase grinding wheel and essence that CNC, which processes bistrique,
Emery wheel, it is integral which connect shape with the finishing grinding wheel, which surrounds equidirectional turn of same axis with the finishing grinding wheel
It is dynamic, it is roughly ground, is then refined first.
Third step, clear off, cleared off using the shag carpet of staple length 20mm, and by clear off liquid synchronize lubrication with
And polishing, time control is cleared off at 30-100 seconds.
This clears off liquid and is made of milling, polishing fluid and dispersant, which controls in the range of 6-8,
The temperature for clearing off liquid is controlled at 42-48 °C.
The weight ratio relationship of milling, polishing fluid and dispersant is 70-80：25-15：2-5, wherein milling is by aoxidizing
The weight ratio relationship of zirconium particulate matter and strontium oxide strontia particulate matter composition, zirconia particles object and strontium oxide strontia particulate matter is 70:25.
Polishing fluid is made of deionized water, alumina particle object and calcium oxide powder, deionized water, alumina particle object with
And the weight ratio relationship of calcium oxide powder is 75-85：10-20：2-5.
Dispersant is made of dispersant powder and deionized water, and the weight ratio relationship of powder powder and deionized water is
30-55：150-300.
The weight ratio relationship of its component of dispersant powder is：Sodium citrate 3-15：Sodium metasilicate 8-35：Sodium tripolyphosphate
10-40：Calgon 5-25：Sodium oxalate 1-8：Polyethylene glycol 5-15：Triethanolamine 3-12：Carboxymethyl cellulose 1-5.
4th step, tempering carry out first time tempering first, and the step product positive and negative for then carrying out third step clears off respectively
100 seconds, the fine crack of glass surface caused by sweeping off tempering, then after cleaning, carry out second of tempering so that glass surface shape
At fine and close and uniform tempering stress layer.
It is cleaned after 5th step, tempering.
Beneficial effects of the present invention are：The mobile phone glass back shroud that large curved surface can be processed using the method for the present invention is produced
Product, the width of big radian curved surface, between 20 mm, are much larger than the design of 3 mm of conventional mobile phone cover board curved surface width in 15 mm.
Description of the drawings
Fig. 1 is the structural schematic diagram of shag carpet of the present invention.
Specific implementation mode
As shown in Figure 1, a kind of processing method of curved surface mobile phone glass back shroud comprising following steps：
The first step, sawing sheet obtain cover board using break bar glass-cutting raw material.
Thickness is selected to carry out sawing sheet in 1.5 to 1.8mm glass raw material, the cover board length and width dimensions that sawing sheet obtains are than cover board reality
Big 0.3 mm of border size.
For example, if it is 75*155mm to require cover board appearance and size, it is 75.3*155.3mm to select sawing sheet size.
Since the big cutting difficulty of glass raw material thickness is bigger, so the diamond break bar of 360 to 370 teeth is selected to be cut
It cuts, scribe-wheel angle selects 130 degree, to generate chipping when effectivelying prevent cutting, lubricating oil is added dropwise on break bar, 8 are selected in practice
The cutting effect that number aeroengine oil can be got well, must can be effective from the reverse side gradation of cutting line when finding gradation in practice
Control is collapsed scarce.
Second step, CNC processing.
The cover board surrounding in the bistrique grinding first step is processed using CNC, surrounding processes big radian curved surface in cover board top surface.
The width of big radian curved surface, between 20 mm, is much larger than 3 mm's of conventional mobile phone cover board curved surface width in 15 mm
Design.
It includes corase grinding wheel and finishing grinding wheel that CNC, which processes bistrique, and it is integral which connect shape with the finishing grinding wheel, this is slightly
Emery wheel surrounds the equidirectional rotation of same axis with the finishing grinding wheel.
When specific processing, to be roughly ground, then refined first, wherein corase grinding is carried out using No. 400 sand,
Fine grinding is carried out using No. 1200 sand, due to needing to process big radian curved surface so bistrique processing contact surface increases, by conventional cutting
The hydraulic pressure of liquid is 3Kg/CM2, is increased to 4KG/CM2, prevents burning knife bad.
CNC machined parameters are set as, and the feed rate of corase grinding is 1000MM/s, and the feed rate of multiplying power 100, fine grinding is
700MM/S, multiplying power 80, CNC process grinding spindle rotating speed since the increasing of cambered surface is adjusted to 40000 by original 45000 revs/min
Rev/min, ensure the bending strength of product in 700KGF or more.
Third step clears off, and the width of big radian curved surface processed by the present invention, between 20 mm, is used in 15 mm
Traditional technique that clears off is difficult to sweep product bright, when the present invention clears off, is swept using the shag carpet 100 of staple length 20mm
Light, and lubrication and polishing are synchronized by clearing off liquid, time control is cleared off at 30-100 seconds.
The shag carpet 100 includes rotary head 110 and carpet brush 120, which is fixedly connected on the rotary head
110 bottoms.
The carpet brush 120 includes upper layer fixed bed 121 and several clears off carpet layer 122.
Several this clears off that carpet layer 122 is folded to be located at together and be symmetrically connected to the 121 bottom both ends of upper layer fixed bed.
This clears off carpet layer 122 with free end 123 and fitting end 124, which is bonded end 124 with this and divides
Not Wei Yu this clear off the both ends of carpet layer 122.
Wherein, layer clears off the lower section of carpet layer 122 on it for the fitting end 124 fitting, and several this is made to clear off carpet layer 122
It can fold and be located at together.
When work, cleared off using the free end 123.
121 middle position of upper layer fixed bed is locked in 110 bottom of rotary head with by the carpet brush by lock 125
120 entirety are fixedly connected on 110 bottom of rotary head.
The rotary head 110 include ontology 130 and shaft 140, wherein offered on the ontology 130 post-receiving chamber 131 and
Infusion slot 132.
The post-receiving chamber 131 is opened in 130 top center position of ontology, which is plugged in the post-receiving chamber 131,
The shaft 140 rotation simultaneously drives the rotary head 110 and 120 high-speed rotation of carpet brush to be cleared off simultaneously.
When specific implementation, it is provided with card slot 151 in the post-receiving chamber 131, it is corresponding with the card slot 151 in the shaft
It is convexly equipped with clamp 152 on 140 bottom outside faces, which is connected in the card slot 151.
132 ring of infusion slot is located on the ontology 130, meanwhile, which, should through being arranged in the ontology 130
132 top of infusion slot is provided with outlet tube 160.
When work, clears off liquid and be flowed into the infusion slot 132 by amount by the outlet tube 160, and pass through the infusion
Slot 132 flows into and enters in the carpet brush 120 from top to bottom, clears off liquid to be reached for the carpet brush 120 offer, and reach lubrication
And the effect of polishing.
This clears off liquid and is made of milling, polishing fluid and dispersant.
The pH value for clearing off liquid controls in the range of 6-8, clears off best results, adds sodium hydroxide when less than 6, be more than
When 8, addition citric acid is adjusted so that glass major item silica and clears off liquid and has best reaction effect.
The temperature for clearing off liquid controls in 42-48 degrees Celsius, practice when its temperature is more than 50 degree, the additive in milling
It loses activity, causes milling poor dispersion, moisture evaporation is too fast, and milling density unevenness, water temperature is caused to be less than 40 degree, and be milled water
It is slow with glass reaction speed so as to clear off that the time is long and sweep and do not work, and experimental verification is bright in the range of 42-48 degrees Celsius, clears off
Yield reaches 80%, and required time is most 15 minutes short.
The weight ratio relationship of milling, polishing fluid and dispersant is 70-80：25-15：2-5.
Wherein, milling is made of zirconia particles object and strontium oxide strontia particulate matter, zirconia particles object and strontium oxide strontia particle
The weight ratio relationship of object is 70:25.
Polishing fluid is made of deionized water, alumina particle object and calcium oxide powder, deionized water, alumina particle object with
And the weight ratio relationship of calcium oxide powder is 75-85：10-20：2-5.
Dispersant is made of dispersant powder and deionized water, and the weight ratio relationship of powder powder and deionized water is
30-55：150-300.
During preparation, deionized water is placed in the reaction vessel first, after being then warming up to 60 °C -65 °C,
Dispersant powder is added under stirring, continuation react one 2 hours 1 hour under 60 °C -65 °C, through aperture is 10 after cooling
The porous ceramics of -50 microns of micron is sieved through filter, obtains dispersant.
The weight ratio relationship of its component of dispersant powder is：Sodium citrate 3-15：Sodium metasilicate 8-35：Sodium tripolyphosphate
10-40：Calgon 5-25：Sodium oxalate 1-8：Polyethylene glycol 5-15：Triethanolamine 3-12：Carboxymethyl cellulose 1-5.
When specific implementation, there are many building forms for dispersant powder, specific as follows.
In the first embodiment, the weight ratio relationship of its component of dispersant powder is：Sodium citrate 5：Sodium tripolyphosphate
30：Sodium oxalate 5：Triethanolamine 10：Sodium metasilicate:25：Calgon 15：Polyethylene glycol 10：Carboxymethyl cellulose 1.
In second of embodiment, the weight ratio relationship of its component of dispersant powder is：Sodium citrate 15：Sodium metasilicate 15：
Sodium tripolyphosphate 15：Calgon 25：Sodium oxalate 8：Polyethylene glycol 14：Triethanolamine 10：Carboxymethyl cellulose 2.
4th step, tempering,
The purpose of this step tempering be increase the stress of glass surface so that glass can shock resistance and scratch-resistant, it is main former
Reason is that glass is placed in the potassium nitrate melt of melting so that the potassium ion hair in the sodium ion and potassium nitrate melt of glass surface
Raw displacement reaction, since potassium ion volume is more than sodium ion volume, after the sodium ion of glass surface is replaced by potassium ion, potassium ion
It squeezes mutually to form application layer in glass surface, achievees the purpose that glass reinforced.
Since glass back cover plate of the present invention is to be applied on mobile phone, and there is protrusion, anti-drop test especially to close at the back side
Key, a common steel process are difficult to meet performance requirement.
First time tempering is first carried out headed by specific toughening method, the step product positive and negative for then carrying out third step is swept respectively
Light 100 seconds, the fine crack of glass surface caused by sweeping off tempering, then after cleaning, carry out second of tempering so that glass surface
Fine and close and uniform tempering stress layer is formed, drop test effect can guarantee that glass is not broken.
The temperature of first time tempering is 415 °C, and swap time is 6 hours;When first time tempering, preheating temperature 350
Degree, 1 hour preheating time, after the completion of tempering, cooling control cooling wind pressure is 200Pa, flow 10Nm3/h, cooling wind temperature
It it is 50 °C, cooling time is 60 minutes.
The temperature of second of tempering is 460 °C, and swap time is 0.5 hour;When second of tempering, 400 ° of preheating temperature
C, 1.5 hours preheating time, after the completion of tempering, cooling control cooling wind pressure is 200Pa, flow 20Nm3/h, cooling wind temperature
It it is 50 °C, cooling time is 30 minutes.
Glass can reach 900MPA or more by secondary chemical tempering rear surface stress CS, and stress layer depth DOL parameters reach
To 40 or more, secondary steel, which turns to, improves glass surface stress value, and the potassium concentration of potassium nitrate melt must control
10000PPM or more, otherwise CS parameter values cannot reach 900MPA.
It is cleaned after 5th step, tempering.
The product surface for completing the 4th step remains a large amount of potassium nitrate residual, uses the citric acid solution of 5% concentration and 1%
Oxalic acid solution mixing, be heated to 45 degree, after glass immersion 3 minutes, cross ten groove ultrasonics cleaning, glass can be effectively removed
The potassium nitrate on surface remains.
Claims (8)
1. a kind of processing method of curved surface mobile phone glass back shroud, it is characterised in that：Include the following steps：
The first step, sawing sheet obtain cover board using break bar glass-cutting raw material, select thickness 1.5 to 1.8mm glass raw material into
Row sawing sheet, cover board length and width dimensions 0.3 mm bigger than cover board actual size that sawing sheet obtains select the diamond break bar of 360 to 370 teeth
It being cut, scribe-wheel angle selects 130 degree,
Second step, CNC processing, process the cover board surrounding in the bistrique grinding first step, surrounding is processed in cover board top surface using CNC
Big radian curved surface, for the width of big radian curved surface in 15 mm between 20 mm, it includes corase grinding wheel and fine grinding that CNC, which processes bistrique,
Wheel, it is integral which connect shape with the finishing grinding wheel, the corase grinding wheel and the finishing grinding wheel around the equidirectional rotation of same axis,
It is roughly ground, is then refined first,
Third step clears off, and is cleared off using the shag carpet of staple length 20mm, and synchronize lubrication and throwing by clearing off liquid
Light, cleared off time control at 30-100 seconds,
This clears off liquid and is made of milling, polishing fluid and dispersant, which controls in the range of 6-8, this is swept
The temperature of light liquid is controlled at 42-48 °C,
The weight ratio relationship of milling, polishing fluid and dispersant is 70-80：25-15：2-5, wherein milling is by zirconium oxide
The weight ratio relationship of grain object and strontium oxide strontia particulate matter composition, zirconia particles object and strontium oxide strontia particulate matter is 70:25,
Polishing fluid is made of deionized water, alumina particle object and calcium oxide powder, deionized water, alumina particle object and oxygen
The weight ratio relationship for changing calcium powder is 75-85：10-20：2-5,
Dispersant is made of dispersant powder and deionized water, and the weight ratio relationship of powder powder and deionized water is 30-
55：150-300,
The weight ratio relationship of its component of dispersant powder is：Sodium citrate 3-15：Sodium metasilicate 8-35：Sodium tripolyphosphate 10-
40：Calgon 5-25：Sodium oxalate 1-8：Polyethylene glycol 5-15：Triethanolamine 3-12：Carboxymethyl cellulose 1-5,
4th step, tempering carry out first time tempering first, and the step product positive and negative for then carrying out third step clears off 100 respectively
Second, the fine crack of glass surface caused by sweeping off tempering, then after cleaning, carry out second of tempering so that glass surface is formed
Fine and close and uniform tempering stress layer,
It is cleaned after 5th step, tempering.
2. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：It is thick in second step
Mill is carried out using No. 400 sand, and fine grinding is carried out using No. 1200 sand, and the hydraulic pressure of cutting fluid is 4KG/CM2, the setting of CNC machined parameters
For the feed rate of corase grinding is 1000MM/s, and the feed rate of multiplying power 100, fine grinding is 700MM/S, multiplying power 80, CNC processing bistriques
The speed of mainshaft is 40000 revs/min, ensures the bending strength of product in 700KGF or more.
3. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：It should in third step
Shag carpet includes rotary head and carpet brush, which is fixedly connected on the rotary head bottom, which includes upper layer
Fixed bed and it is several clear off carpet layer, several this clears off carpet stacking and is located at together and is symmetrically connected to the upper layer fixed bed bottom
Portion both ends, the upper layer fixed bed middle position are locked in the rotary head bottom so that integrally fixation connects by the carpet brush by lock
It is connected on the rotary head bottom,
The rotary head includes ontology and shaft, wherein offers post-receiving chamber on the ontology and infusion slot, the post-receiving chamber open up
In the bodies top middle position, which is plugged in the post-receiving chamber, the shaft rotation and simultaneously drive the rotary head and
The carpet brush high-speed rotation is cleared off, which is located on the ontology, meanwhile, the infusion slot is through setting in the ontology
In, which is provided with outlet tube.
4. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：It will in third step
The pH value for clearing off liquid controls in the range of 6-8, and pH value adds sodium hydroxide when being less than 6, when pH value is more than 8, adds lemon
Acid is adjusted.
5. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：Oxygen in third step
Change the granular size of zirconium particulate matter and strontium oxide strontia particulate matter at 50 microns -100 microns.
6. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：Oxygen in third step
Change the granular size of alumina particles object and calcium oxide powder at 50 microns -80 microns.
7. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：It is made in third step
During back-up powder, deionized water is placed in the reaction vessel first, after being then warming up to 60 °C -65 °C, is being stirred
Dispersant powder is added under state, continuation react one 2 hours 1 hour under 60 °C -65 °C, it is cooling after through aperture for 10 microns -
50 microns of porous ceramics is sieved through filter, obtains dispersant.
8. a kind of processing method of curved surface mobile phone glass back shroud as described in claim 1, it is characterised in that：In 4th step
The temperature of tempering is 415 °C, and swap time is 6 hours;When first time tempering, 350 degree of preheating temperature, preheating time 1
Hour, after the completion of tempering, cooling control cooling wind pressure is 200Pa, and flow 10Nm3/h, cooling wind temperature is 50 °C, when cooling
Between be 60 minutes；The temperature of second of tempering is 460 °C, and swap time is 0.5 hour;When second of tempering, preheating temperature
400 °C, 1.5 hours preheating time, after the completion of tempering, cooling control cooling wind pressure is 200Pa, flow 20Nm3/h, cooling wind
Temperature is 50 °C, and cooling time is 30 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810883214.6A CN108793708A (en) | 2018-08-06 | 2018-08-06 | A kind of processing method of curved surface mobile phone glass back shroud |
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| CN201810883214.6A CN108793708A (en) | 2018-08-06 | 2018-08-06 | A kind of processing method of curved surface mobile phone glass back shroud |
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| CN108793708A true CN108793708A (en) | 2018-11-13 |
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ID=64079392
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| CN110255924A (en) * | 2019-06-27 | 2019-09-20 | 广东星星精密玻璃科技有限公司 | A kind of bend glass alternating temperature steel process |
| CN112428311A (en) * | 2020-09-25 | 2021-03-02 | 深圳市祥晖光电有限公司 | Method for cutting semi-circular arc plate with polishing effect |
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| CN112428311A (en) * | 2020-09-25 | 2021-03-02 | 深圳市祥晖光电有限公司 | Method for cutting semi-circular arc plate with polishing effect |
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