CN109231800A - Adjust method, hot bending product processing technique and the hot bending product of product flatness - Google Patents
Adjust method, hot bending product processing technique and the hot bending product of product flatness Download PDFInfo
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- CN109231800A CN109231800A CN201710558748.7A CN201710558748A CN109231800A CN 109231800 A CN109231800 A CN 109231800A CN 201710558748 A CN201710558748 A CN 201710558748A CN 109231800 A CN109231800 A CN 109231800A
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- product
- flatness
- hot bending
- workpiece
- mold temperature
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Classifications
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/04—Bending or folding of plates or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/84—Heating or cooling
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
Abstract
The present invention relates to hot bending product manufacture fields, specifically, providing a kind of method, hot bending product processing technique and hot bending product for adjusting product flatness.The method of above-mentioned adjustment product flatness keeps upper mold temperature different with lower mold temperature in the hot bending process of workpiece by adjusting upper mold temperature and/or lower mold temperature, to making the non-standard value of the flatness of workpiece, to make up the bending of product generation after chemical strengthening process.Upper mold and the temperature of lower mold is set Bu Tong workpiece to be made to generate bending (i.e. preposition adjustment) in turn by adjusting upper mold temperature and/or lower mold temperature, the bending direction of workpiece is opposite with the bending direction of workpiece in subsequent chemistry reinforcing process at this time, the bending that product generates after chemical strengthening process is thereby compensateed for, the flatness of product is made to reach defined requirement.This method has the advantages that simple process, maturation and at low cost.
Description
Technical field
The present invention relates to hot bending product manufacture fields, in particular to a kind of method for adjusting product flatness, hot bending
Product processing technique and hot bending product.
Background technique
Hot bending is the process for making workpiece bows under the regulation flexure temperature for workpiece being heated to the workpiece again, for hot bending
Material has organic glass and plastic sheet (plate) etc..
Heat-bending glass, be by plate glass heating and softening form in a mold, then it is annealed made of bend glass.It is existing
The curved hot bending product in tetra- side 3D chemical strengthening process in process in can generate the overbending of planar section, produce
The flatness of product does not reach requirement；Alternatively, can generally use and increase after chemical strengthening to make the flatness of product reach requirement
Add subsequent treatment process and solved with adjusting the method for flatness, the above method can be such that the processing technology of entire hot bending product becomes
Complexity, and will increase equipment cost and cost of labor.
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of method for adjusting product flatness, this method simple process, maturation,
It not will increase equipment cost and cost of labor, it is at low cost, and the flatness of product can be effectively adjusted, reach the flatness of product
To defined requirement.
The second object of the present invention is to provide a kind of hot bending product processing technique, which can make the flat of product
Whole degree reaches defined requirement, simple process, maturation, and not will increase other equipment and manpower, and cost is relatively low.
The third object of the present invention is to provide a kind of hot bending product, which processes work using above-mentioned hot bending product
Skill is process, and has the advantages that product surface flatness levels height and at low cost.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
In a first aspect, passing through in the hot bending process of workpiece the present invention provides a kind of method for adjusting product flatness
Adjustment upper mold temperature and/or lower mold temperature keep upper mold temperature different with lower mold temperature, to make the flatness of workpiece
For non-standard value, to make up the bending that product after chemical strengthening process generates.
As further preferably technical solution, the described method comprises the following steps:
(a) the flatness R of workpiece after chemical strengthening is determined2；
(b) the flatness standard value R of product is determined；
(c) the flatness R of workpiece after hot bending is obtained1, R1=R-R2；
(d) temperature of upper mold and/or lower mold in workpiece hot bending process is adjusted, the flatness for obtaining workpiece after hot bending is
R1When upper mold temperature T1With lower mold temperature T2；
Or, record different temperatures upper mold and different temperatures lower mold to workpiece carry out hot bending after workpiece it is smooth
Degree, then obtains and R1Corresponding upper mold temperature T1With lower mold temperature T2；
(e) product is processed: carrying out hot bending to workpiece, the temperature of upper mold is T when hot bending1, the temperature of lower mold is T2, so
Chemical strengthening is carried out to the workpiece after hot bending afterwards and obtains the product that flatness is R.
As further preferably technical solution, R2Be the same workpiece of at least two pieces is carried out same parameter chemistry it is strong
Change the average value of the flatness obtained after test.
As further preferably technical solution, flatness standard value R is numerical value set [Rmin,Rmax] in arbitrary number
Value.
As further preferably technical solution, hot bending process includes preheating, molding and annealing, T1And T2Respectively anneal
When upper mold temperature and lower mold temperature.
As further preferably technical solution, the preheating is segmentation preheating, described to be shaped to sectional forming, described to move back
Fire is stepped annelaing.
As further preferably technical solution, T1And T2Upper mold temperature and lower mold temperature when respectively first segment is annealed
Degree.
Second aspect, the present invention provides a kind of hot bending product processing techniques, comprising the following steps: by clean workpiece into
Row hot bending, the temperature of upper mold and/or the temperature of lower mold are respectively adopted in the method for above-mentioned adjustment product flatness when hot bending
Then obtained upper mold temperature adjusted and/or lower mold temperature carry out chemical strengthening and obtain hot bending product.
As further preferably technical solution, comprising the following steps: sawing sheet first；Then it is ground, cleans；Then again into
Row hot bending, hot bending include segmentation preheating, sectional forming and stepped annelaing, and upper mold temperature is T when wherein first segment is annealed1, under
Mold temperature is T2；Then special-shaped processing is carried out to the workpiece after hot bending again；Last chemical strengthening obtains hot bending product.
The third aspect, the present invention provides a kind of hot bending products that above-mentioned hot bending product processing technique is process.
Compared with prior art, the invention has the benefit that
The method of adjustment product flatness provided by the invention is in the hot bending process of workpiece by adjusting upper mold temperature
And/or lower mold temperature keeps upper mold different with the temperature of lower mold, to make the non-standard value of the flatness of workpiece, to make up
The bending that product generates after chemical strengthening process makes upper mold under by adjusting upper mold temperature and/or lower mold temperature
The temperature of mold is different and then workpiece is made to generate bending (i.e. preposition adjustment), and the bending direction of workpiece and subsequent chemistry are strengthened at this time
The bending direction of workpiece is on the contrary, thereby compensate for the bending of product generation after chemical strengthening process (i.e. in subsequent chemistry in process
Strengthen the correction that can take advantage of a situation in process), so that the flatness of product is reached defined requirement.Increase after chemical strengthening with existing
The method of subsequent treatment process is compared, and present invention employs the method for preposition adjustment, need to only adjust what processing hot bending product must have
Upper mold and/or lower mold temperature in hot bending process can make the flatness of product reach defined requirement, simple process, at
It is ripe, and not will increase other equipment and manpower, cost is relatively low.Meanwhile above method comprehensive consideration hot bending process and chemistry are strong
The influence of relationship between chemical industry sequence and the flatness to product produces for guide product, makes the processing technology of product more
It is advanced.
Hot bending product processing technique provided by the invention includes hot bending and chemical strengthening, when hot bending the temperature of upper mold and/
Or upper mold temperature adjusted and/or lower mold temperature obtained in the above method is respectively adopted in the temperature of lower mold, should add
The method that work technique uses preposition adjustment flatness, passes through the upper mold that will be processed in the hot bending process that hot bending product must have
And/or the temperature of lower mold is set as specific temperature adjusted, generates workpiece in hot bending process and chemical strengthening
The contrary bending that process generates, correction of then taking advantage of a situation in chemical strengthening process can be such that the flatness of product reaches
Defined requirement, simple process, maturation, and not will increase other equipment and manpower, cost is relatively low.Meanwhile above-mentioned processing technology
The comprehensive consideration influence of the relationship between hot bending process and chemical strengthening process and the flatness to product, technique are more first
Into.
Hot bending product provided by the invention is process using above-mentioned hot bending product processing technique, has product surface smooth
The horizontal high and at low cost advantage of degree.
Detailed description of the invention
Workpiece shapes when Fig. 1 is embodiment 1 upper mold temperature is higher than lower mold temperature in adjusting product flatness method
Schematic diagram is compareed with product standard shape；
Fig. 2 is the workpiece shapes when mold temperature is higher than upper mold temperature under adjusting in product flatness method of embodiment 1
Schematic diagram is compareed with product standard shape；
Fig. 3 is workpiece shapes and product standard shape of the embodiment 1 in adjustment product flatness method after chemical strengthening
Compare schematic diagram.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will
Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific
Condition person carries out according to conventional conditions or manufacturer's recommended conditions.
In a first aspect, one embodiment of the present invention provides a kind of method for adjusting product flatness, in workpiece
Keep upper mold temperature different with lower mold temperature by adjusting upper mold temperature and/or lower mold temperature in hot bending process, thus
Make the non-standard value of the flatness of workpiece, to make up the bending that product generates after chemical strengthening process.
Above-mentioned upper mold and lower mold refer to the component with heating function, and workpiece is in the heating of upper mold and lower mold
Reach flexure temperature and generate bending and ultimately form required shape, different titles can be used in different hot bending equipment, as above
Heating plate, lower heating plate etc., as long as can be realized the function of heating heating, those skilled in the art should not be accordingly to this hair
Bright protection scope makes limitation.
In the present invention, typical but non-limiting product is glass product or plastic product etc..
The method for the adjustment product flatness that present embodiment provides is in the hot bending process of workpiece by adjusting upper mold
It is different with the temperature of lower mold that temperature and/or lower mold temperature make upper mold, thus make the non-standard value of the flatness of workpiece, with
The bending that product generates after chemical strengthening process is made up, i.e., makes upper mold by adjusting upper mold temperature and/or lower mold temperature
It is different with the temperature of lower mold and then workpiece is made to generate bending (i.e. preposition adjustment), the at this time bending direction and subsequent chemistry of workpiece
Strengthen the bending direction of workpiece in process on the contrary, thereby compensateing for the bending of product generation after chemical strengthening process (i.e. subsequent
Can take advantage of a situation correction in chemical strengthening process), so that the flatness of product is reached defined requirement.With existing after chemical strengthening
The method for increasing subsequent treatment process is compared, and present invention employs the methods of preposition adjustment, and need to only adjust processing hot bending product must
Upper mold and/or lower mold temperature in some hot bending processes can make the flatness of product reach defined requirement, technique letter
It is single, mature, and not will increase other equipment and manpower, cost is relatively low.
Specifically, when mold temperature is higher than lower mold temperature instantly, the opposite direction bending of the downward mold of workpiece is (i.e. upwards
The direction of mold is bent)；When upper mold temperature be higher than lower mold temperature when, workpiece to the opposite direction of upper mold be bent (i.e. to
The direction of lower mold is bent).And workpiece can be bent after chemical strengthening process to the direction for applying chemical strengthening power.Therefore,
By adjusting upper mold temperature and/or lower mold temperature, keeps upper mold temperature different with lower mold temperature, thus make workpiece in heat
The bending with opposite direction when chemical strengthening is generated when curved, is made up subsequent chemistry and is strengthened the product bending that process generates, makes product
Flatness reach defined requirement.Meanwhile pass of the above method comprehensive consideration between hot bending process and chemical strengthening process
The influence of system and the flatness to product produces for guide product, keeps the processing technology of product more advanced.
In the present invention, workpiece main purpose of chemical strengthening after hot bending is to discharge the internal stress of product, enhances product
Intensity, reduction explosion and so on.
Preferably, when workpiece is glass material, potassium nitrate solution and/or sodium nitrate solution can be used in chemical strengthening
Chemical strengthening is carried out, the impact resistance etc. of glass product is further increased.
It should be understood that " workpiece " in the present invention refers in particular to the intermediate products in product processing (may include
Raw material), such as the intermediate products before and after hot bending or the intermediate products etc. only after chemical strengthening；" product " refer to by hot bending and
The satisfactory final products of the flatness obtained after chemical strengthening.
It is preferably carried out in mode, the described method comprises the following steps in one kind:
(a) the flatness R of workpiece after chemical strengthening is determined2；
(b) the flatness standard value R of product is determined；
(c) the flatness R of workpiece after hot bending is obtained1, R1=R-R2；
(d) temperature of upper mold and/or lower mold in workpiece hot bending process is adjusted, the flatness for obtaining workpiece after hot bending is
R1When upper mold temperature T1With lower mold temperature T2；
(e) product is processed: carrying out hot bending to workpiece, the temperature of upper mold is T when hot bending1, the temperature of lower mold is T2, so
Chemical strengthening is carried out to the workpiece after hot bending afterwards and obtains the product that flatness is R.
Originally it is preferably carried out mode and provides the method for the first specific adjustment product flatness, i.e., pass through determination first
The flatness R of workpiece after chemical strengthening2Reach smooth needed for being obtained after workpiece hot bending with the flatness standard value R of product
Spend R1, R1=R-R2；Then upper mold temperature and/or lower mold temperature are adjusted in hot bend test, are measured in first group of upper mold
The flatness R of workpiece at a temperature of temperature and lower mold11, by comparing R11With R1Difference Rx (Rx=R11-R1), and then judge
Whether need to improve upper mold temperature (reducing lower mold temperature) or improve lower mold temperature (reducing upper mold temperature), then
It is adjusted, to make RxBe zero, and so on carry out cyclic test, until when flatness be R1(i.e. RxUntil when being zero),
Upper mold temperature and lower mold temperature at this time is required T1And T2；Finally utilize T1And T2Pair product processing is carried out, i.e.,
Workpiece carries out hot bending, and the temperature of upper mold is T when hot bending1, the temperature of lower mold is T2, then to the workpiece after hot bending
It learns to strengthen and obtains the product that flatness is R.
The specific aim of the first above-mentioned specific method is stronger, according to required R1, carry out purposive reasonable heat
Curved test determines one group of upper mold temperature, lower mold temperature and smooth degree value, then the reference numerical value and flatness first
Standard value R come determine second of test upper mold temperature and/or lower mold temperature and test obtain flatness at this temperature
Numerical value obtains required R with this cyclic test1With corresponding T1And T2.This method is particularly suitable for for specific
R2The flatness of product is adjusted with R.
It is preferably carried out in mode, the described method comprises the following steps in one kind:
(a) record different temperatures upper mold and different temperatures lower mold to workpiece carry out hot bending after workpiece it is smooth
Degree；
(b) the flatness R of workpiece after chemical strengthening is determined2；
(c) the flatness standard value R of product is determined；
(d) the flatness R of workpiece after hot bending is obtained1, R1=R-R2；
(e) it finds in step (a) recorded data and R1Corresponding upper mold temperature T1With lower mold temperature T2；
(f) product is processed: carrying out hot bending to workpiece, the temperature of upper mold is T when hot bending1, the temperature of lower mold is T2, so
Chemical strengthening is carried out to the workpiece after hot bending afterwards and obtains the product that flatness is R.
Originally it is preferably carried out mode and provides the method for second of specific adjustment product flatness, preferably method is first for this
The lower mold of the upper mold and different temperatures that first have recorded different temperatures carries out the flatness of workpiece after hot bending, the above number to workpiece
According to preferably using table or manifold { T1x, T2x, R1x}(R1xFinger upper mold temperature is T1x, lower mold temperature is T2xWhen workpiece hot bending
Rear flatness) it saves；Then determine chemical strengthening after workpiece flatness R2It is obtained with the flatness standard value R of product
The flatness R reached needed for after workpiece hot bending1, R1=R-R2；Then it is focused to find out and R in above table or number1Corresponding upper mold
Has temperature T1With lower mold temperature T2；Finally utilize T1And T2Carry out product processing, i.e., hot bending carried out to workpiece, when hot bending on
The temperature of mold is T1, the temperature of lower mold is T2, then the workpiece after hot bending is carried out chemical strengthening to obtain flatness being R's
Product.
Compared with the first above-mentioned specific method, it is in place of the main difference of second of specific method: second
Specific method has recorded the flatness of workpiece at a temperature of numerous groups of upper mold temperature and lower mold, due to not considering only
Required flatness R1, therefore the flatness numberical range in above table or manifold is more broad, relative to flatness standard
It may be positive value for value R, may be negative value, and ratio half-and-half.The advantages of second of specific method is, if using
Different chemical strengthening method formulates different flatness standard values etc., need to only determine the smooth of after chemical strengthening workpiece
Spend R2Or change after flatness standard value R, and then extrapolate change after needed for R1, then looked in above table or manifold
To with R after change1Corresponding upper mold temperature T1With lower mold temperature T2, do not need to re-start hot bend test again, greatly
Adjustment time is saved greatly, the scope of application is wider.
It is preferably carried out in mode in one kind, R2It is the chemical strengthening that same parameter is carried out to the same workpiece of at least two pieces
The average value of the flatness obtained after test.In order to improve the accuracy of chemical strengthening test, and then improve flatness adjustment
Accuracy, R2The average value of flatness after taking multiple chemical accelerated test.
Preferably, in hot bend test, the flatness at a temperature of same upper mold temperature and same lower mold takes at least two
The average value of secondary test to improve the accuracy of hot bend test, and then improves the accuracy of flatness adjustment.
It is preferably carried out in mode in one kind, flatness standard value R is numerical value set [Rmin,Rmax] in any number.
In actual production, due to unstability that may be present in materials variance, equipment operation etc., the flatness of product allows to deposit
In certain error, therefore, flatness standard value R is set as numerical value set [Rmin,Rmax] in any number, that is, adjust after
It is complied with standard as long as the flatness of product can be considered in this numerical value set.
It is preferably carried out in mode in one kind, hot bending process includes preheating, molding and annealing, T1And T2When respectively annealing
Upper mold temperature and lower mold temperature.Workpiece realizes heating until reaching flexure temperature, then in the bending temperature in warm-up phase
The brake forming (bendings of such as four edges) at position needed for the lower realization workpiece of degree, annealed after formation.Upper mold is adjusted in annealing
Tool temperature and/or lower mold temperature reach required T1And T2Molding structure needed for guaranteeing workpiece is not only able in hot bending
Stability；Simultaneously as temperature is higher when molding, adjustment upper mold cooling rate and/or lower mold cooling speed in annealing
Degree reaches T1And T2, do not need to heat up again, save the energy, temperature range of choice is wide；And it can select higher
At a temperature of realize the bending opposite with the bending direction of chemical strengthening technique, workpiece is more easily bent under high temperature, has saved tune
The whole time.
It is preferably carried out in mode in one kind, the preheating is segmentation preheating, described to be shaped to sectional forming, the annealing
For stepped annelaing.Segmentation preheating refers to each period therein using different preheating temperatures, and sectional forming refers to therein
Each period is using different temperature heating and wherein at least has in one section using gradual change pressure pressurization from low to high, segmentation
Annealing refers to that each period therein anneals to workpiece using different temperature, the segmentation preheats, sectional forming and
Period in stepped annelaing is two or more.It can make to produce using segmentation preheating, sectional forming and stepped annelaing
The dimensional accuracy of product is higher, shaped article flatness is more preferable, molding yield is high, open defect is few, it is most important that product one
Cause property is high, and therefore, the accuracy in the adjustment of product flatness is relatively also higher, reduces the production processed every time under equal conditions
The difference of the flatness of product.In addition, the division number of stepped annelaing more (i.e. annealing station is more) can make the internal stress of product
More uniform, internal structure is more stable, and then improves the mechanical strength of product.
It is preferably carried out in mode in one kind, T1And T2Upper mold temperature and lower mold temperature when respectively first segment is annealed.
Also in the condition of high temperature, the bending of workpiece is relatively easy to the temperature of upper mold and lower mold when first segment is annealed, and upper mold is under
The adjustable space of mold temperature is also larger；In addition, upper mold temperature and lower mold temperature have been adjusted in first segment annealing, it is real
After the bending of existing workpiece, moreover it is possible to guarantee that upper mold is consistent with the temperature of lower mold in annealing in second segment and its later, thus
The uniformly stress of release inside workpiece, keeps the stress state of inside workpiece everywhere consistent as far as possible.
Second aspect, one embodiment of the present invention provide a kind of hot bending product processing technique, comprising the following steps:
Clean workpiece is subjected to hot bending, above-mentioned adjustment product is respectively adopted in the temperature of upper mold and/or the temperature of lower mold when hot bending
Then upper mold temperature adjusted and/or lower mold temperature obtained in the method for flatness carry out chemical strengthening and obtain heat
Curved product.
The hot bending product processing technique that present embodiment provides includes hot bending and chemical strengthening, the temperature of upper mold when hot bending
And/or upper mold temperature adjusted and/or lower mold temperature obtained in the above method is respectively adopted in the temperature of lower mold, it should
The method that processing technology uses preposition adjustment flatness, passes through the upper mold that will be processed in the hot bending process that hot bending product must have
And/or the temperature of lower mold is set as specific temperature adjusted, generates workpiece in hot bending process and chemical strengthening
The contrary bending that process generates, correction of then taking advantage of a situation in chemical strengthening process can be such that the flatness of product reaches
Defined requirement, simple process, maturation, and not will increase other equipment and manpower, cost is relatively low.Meanwhile above-mentioned processing technology
The comprehensive consideration influence of the relationship between hot bending process and chemical strengthening process and the flatness to product, technique are more first
Into.
It is preferably carried out in mode in one kind, comprising the following steps: sawing sheet first；Then it is ground, cleans；Then it carries out again
Hot bending, hot bending include segmentation preheating, sectional forming and stepped annelaing, and upper mold temperature is T when wherein first segment is annealed1, lower die
Tool temperature is T2；Then special-shaped processing is carried out to the workpiece after hot bending again；Last chemical strengthening obtains hot bending product.Above-mentioned technique
Completely, from sawing sheet, be ground, clean to hot bending, abnormity, chemical strengthening, cooperate between each step, integral altogether, synthesis is examined
The relationship of hot bending process and chemical strengthening process and the influence to product flatness have been measured, and has been annealed in the first segment of hot bending process
When set upper mold temperature as T1, lower mold temperature be T2, it is not only able to make the flatness of product to meet the requirements, moreover it is possible to when saving
Between cost and energy cost, while improving the mechanical strength of product.
It should be noted that further including the steps that cleaning between abnormity and chemical strengthening.
Preferably, above-mentioned sawing sheet selection milling machine carries out, and is ground as plain grinding, cleans as ultrasonic cleaning, and chemical strengthening is being changed
It learns to strengthen and be carried out in furnace.
The third aspect, the present invention provides a kind of hot bending products that above-mentioned hot bending product processing technique is process.The heat
Curved product has the advantages that surface smoothness is horizontal high and at low cost.
Below with specific embodiment come further illustrate adjustment product flatness provided by the invention and hot bending product processing
Technique.
Embodiment 1
Supplied materials is glass, and the annealing point of the glass is at 603 DEG C or so, and strain point is at 550 DEG C or so, and softening point is at 684 DEG C
Left and right, by the curved glass product of the rectangular plate of the glass processing and four sides.
The method for adjusting above-mentioned glass flatness, comprising the following steps:
(a) record different temperatures upper mold and different temperatures lower mold to workpiece carry out hot bending after workpiece it is smooth
Degree, see Table 1 for details and table 2；
(b) the flatness R of workpiece after chemical strengthening is determined2(repeatedly measurement is averaged) is 0.12mm；
(c) it determines the flatness standard value R of product, in order to record and convenience of calculation, sets R as zero；
(d) the flatness R of workpiece after hot bending is obtained1, R1=R-R2=-0.12mm；
(e) it finds in step (a) recorded data and R1Corresponding upper mold temperature T1For 632 DEG C and lower mold temperature
Spend T2It is 613 DEG C；
(f) product is processed: carrying out hot bending to workpiece, the temperature of upper mold is 632 DEG C when hot bending, and the temperature of lower mold is
613 DEG C, chemical strengthening then is carried out to the workpiece after hot bending and obtains the product that flatness is R.
Table 1
Table 2
Note: in order to record and convenience of calculation, the flatness standard value R of product is set as zero, therefore, is remembered in Tables 1 and 2
The overproof value of the flatness of record i.e. actual flatness numerical value, and above-mentioned numerical value is the average value of 10 tests.
In addition, Fig. 1-3 illustrates in adjustment product flatness method mold temperature and chemical strengthening to workpiece shapes
It influences.
In addition, the variation of Workpiece length and width is also obtained in chemical strengthening test, the elongated 0.16mm of length direction,
The elongated 0.06mm of width direction, according to the variation of the above length and width and product for the standard requirements of length and width,
Also workpiece can be redefined simultaneously in the length and width in hot bending stage；Or, redefining the length of the workpiece in sawing sheet simultaneously
Degree and width, so as to correction of taking advantage of a situation in subsequent chemical strengthening process.
The following are the complete processing technologys of above-mentioned glass product, comprising the following steps:
1, sawing sheet-carries out sawing sheet, feed rate 360mm/min, speed of mainshaft 2400r/ using vertical and high-speed milling machine
min；
2, plain grinding-carries out plain grinding using flat-grinding machine, and above sweeping speed is 30r/min, and lower wall speed is 25r/min, pushes pressure
Power is 260KG, time 500s；
3, cleaning-uses nine grand slot cleaning machines, and rinse bath is heated to 260 DEG C, the cleaning of ultrasonic wave negative ions, and the time is
30min；
4, hot bending-uses hot-bending machine, and hot bending parameter is as shown in table 3；
Table 3
As shown in Table 3, the upper mold temperature T adjusted that the method through above-mentioned adjustment flatness obtains1With lower mold temperature
Spend T2It is respectively set to upper mold temperature and lower mold temperature when first segment annealing (annealing 1)；
5, for the equipment that abnormity-uses for special-shaped machine, revolver revolving speed is 20r/min, and right wheel revolving speed is 20r/min, central axis
Revolving speed is 40r/min, time 18min；
6, the equipment that chemical strengthening-uses is prompt prestige plus-pressure furnace, and processing technology and parameter are as shown in table 4；
Table 4
Note: room temperature described in table 4 refers to 25 DEG C ± 5 DEG C.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from of the invention
Many other change and modification can be made in the case where spirit and scope.It is, therefore, intended that in the following claims
Including belonging to all such changes and modifications in the scope of the invention.
Claims (10)
1. a kind of method for adjusting product flatness, which is characterized in that by adjusting upper mold temperature in the hot bending process of workpiece
It is different with lower mold temperature that degree and/or lower mold temperature make upper mold temperature, thus make the non-standard value of the flatness of workpiece, with
Make up the bending that product generates after chemical strengthening process.
2. the method for adjustment product flatness according to claim 1, which comprises the following steps:
(a) the flatness R of workpiece after chemical strengthening is determined2；
(b) the flatness standard value R of product is determined；
(c) the flatness R of workpiece after hot bending is obtained1, R1=R-R2；
(d) temperature of upper mold and/or lower mold in workpiece hot bending process is adjusted, the flatness for obtaining workpiece after hot bending is R1When
Upper mold temperature T1With lower mold temperature T2；
Or, the upper mold of record different temperatures and the lower mold of different temperatures carry out the flatness of workpiece after hot bending to workpiece, so
After obtain and R1Corresponding upper mold temperature T1With lower mold temperature T2；
(e) product is processed: carrying out hot bending to workpiece, the temperature of upper mold is T when hot bending1, the temperature of lower mold is T2, then right
Workpiece after hot bending carries out chemical strengthening and obtains the product that flatness is R.
3. the method for adjustment product flatness according to claim 2, which is characterized in that R2It is same at least two pieces
The average value for the flatness that the chemical strengthening that workpiece carries out same parameter obtains after testing.
4. the method for adjustment product flatness according to claim 2, which is characterized in that flatness standard value R is numerical value
Gather [Rmin,Rmax] in any number.
5. according to the methods of the described in any item adjustment product flatness of claim 2-4, which is characterized in that hot bending process includes
Preheating, molding and annealing, T1And T2Upper mold temperature and lower mold temperature when respectively annealing.
6. the method for adjustment product flatness according to claim 5, which is characterized in that the preheating is segmentation preheating,
It is described to be shaped to sectional forming, it is described to be annealed into stepped annelaing.
7. the method for adjustment product flatness according to claim 6, which is characterized in that T1And T2Respectively first segment moves back
Upper mold temperature and lower mold temperature when fiery.
8. a kind of hot bending product processing technique, which comprises the following steps: clean workpiece is carried out hot bending, hot bending
When upper mold temperature and/or the temperature of lower mold the described in any item adjustment product flatness of claim 1-7 are respectively adopted
Method obtained in upper mold temperature adjusted and/or lower mold temperature, then carry out chemical strengthening obtain hot bending product.
9. hot bending product processing technique according to claim 8, which comprises the following steps: sawing sheet first；So
After be ground, clean；Then hot bending is carried out again, and hot bending includes segmentation preheating, sectional forming and stepped annelaing, and wherein first segment is annealed
When upper mold temperature be T1, lower mold temperature be T2；Then special-shaped processing is carried out to the workpiece after hot bending again；Last chemical strengthening
Obtain hot bending product.
10. the hot bending product that hot bending product processing technique described in claim 8 or 9 is process.
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