CN102000916A - Laser cutting method - Google Patents
Laser cutting method Download PDFInfo
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- CN102000916A CN102000916A CN2010102694396A CN201010269439A CN102000916A CN 102000916 A CN102000916 A CN 102000916A CN 2010102694396 A CN2010102694396 A CN 2010102694396A CN 201010269439 A CN201010269439 A CN 201010269439A CN 102000916 A CN102000916 A CN 102000916A
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Abstract
The invention provides a laser cutting method, in particular to a method for removing a water gap of an injection molding and a water gap of a film-covering piece by adopting a cutting path employing teaching programming and related program recording method. The teaching programming method comprises the following steps of: gradually recording the postures and the instant speeds of cutting heads on a curve one by one; associating the data to form continuous cutting motion; and teaching and storing a whole cutting path as a CNC (Computerized Numerical Control) program, wherein regular curves are used for teaching according to the characteristics, and irregular curves are used for teaching by adopting a short line segment fitting method. In the invention, by adopting a mode of controlling the motion of a worktable and the frequency and the energy of laser through program and a working mode of normal cutting, the requirement for operators can be lowered, meanwhile, the processing constancy and the joining continuity between a notch and an arc are ensured, the cutting quality is improved and the application range of laser cutting is further enlarged.
Description
[technical field]
The present invention relates to a kind of laser cutting method that is used to remove the moulding mouth of a river and the nonmetal film-covered member mouth of a river, the laser method at the especially erose moulding mouth of a river and the nonmetal film-covered member mouth of a river is to cutting method.
[background technology]
Injection-moulded plastic part solidifies the formed part of back runner and is called the mouth of a river; The part that the surface sticks non-metallic film is called film-covered member, the nonmetal overlap at film-covered member edge is also referred to as the mouth of a river here.Utilize laser to focus on produce power and come the method for cutting object to be called laser cutting parameter, the process that we will disclose is exactly how to utilize the method for laser cutting to remove the moulding mouth of a river and film-covered member overlap.
Shape according to edge, the film-covered member mouth of a river may be defined as the mouth of a river, plane and the mouth of a river, space.The mouth of a river that the bearing of trend on a certain plane is identical on the bearing of trend at the mouth of a river and the part is called the mouth of a river, plane, it is characterized by the mouth of a river and becomes a plane curve and be positioned on the true planar; The mouth of a river that the bearing of trend of some curved surface is identical on the bearing of trend at the mouth of a river and the part is called the mouth of a river, space, it is characterized by the mouth of a river and becomes a space curve or the mouth of a river to become a plane curve but be positioned at an imaginary plane and other faces mutually on the cross surface.
Certain notebook computer casing adopts up-to-date moulding coating technique, and the removal overlay film mouth of a river that this technology relates to (as Fig. 3 and Fig. 4, the 31-mouth of a river, 32-cut-out) operation is normally utilized the blade hand cut.Hand cut is a kind of more original cutting method, require very high to operation skill, and cut quality is also uncontrollable, subject matter is embodied in following several aspect: cut lengths low precision, circular arc are difficult to guarantee with circular arc dovetail position continuity, different part uniformity with straight line, circular arc, the surface is easy to generate accidental injury, cutting efficiency is low, and operation skill and qualification are had relatively high expectations etc.Problem concentrates on dimensional accuracy, efficient, outward appearance and experienced operator's aspects such as cultivation, therefore is difficult to form the volume production of higher level, influences popularizing and development of this new technology.
Certain mobile phone screen adopts the injection moulding manufacturing process, the removal moulding mouth of a river operation that relates in this technology, what adopt at present is clicking technique, the performer of clicking technique mainly is a cutting knife, this technology subject matter is embodied in following several aspect: the mouth of a river is positioned at curved side or for cutting at the mouth of a river, space, the clicking technique of contact may cause tearing near piece surface damage or the part otch, and is same can not the compatibility multi-form mouth of a river of cutting knife etc.Problem concentrates on the special-shaped mouth of a river and can not cut, and the management cost that the learies that may cause increases and the increase of cutting knife quantity brings rises.
[summary of the invention]
The invention provides a kind ofly be convenient to operate, the laser cutting method of high cutting accuracy, high efficiency, high processing quality, high security, high universalizable, type steady in a long-term, this method is used to remove the moulding mouth of a river and the film-covered member mouth of a river, comprises the steps:
A, part location;
B, part move according to predefined cutting path, adopt multi-shaft interlocked workbench to make part keep cut direction to move along the cutting path normal direction, and cutting path adopt the method for teach programming and recording program therefor;
Wherein, suppose that cutting path is the space curve that is linked to each other and constituted by many points, cutting head promptly is to walk a week along the point on the curve successively along curve week of walking, at each point, cutting head has unique attitude and instantaneous velocity, described teach programming method is cutting head attitude and the instantaneous velocity of putting on the recording curve one by one, and these data are connected forms continuous cutting movement, and teaching whole piece cutting path also saves as the CNC program;
Wherein, regular curve is carried out teaching according to its feature, and irregular curve then adopts the teaching of short line segment fitting process; Described short line segment fitting process is that space curve is divided into some end to end short line segments, obtains an approximate space curve by this short line segment of teaching and replaces real curve, and the curve of match is infinitely close to true curve.
Wherein, the part of described step a location is to guarantee that by the mode that the outside compresses anchor clamps and part fit fully.
Wherein, the part of described step a location is to guarantee to locate the complete level of rear jig by the mode that machinery is installed.
Wherein, the part of described step a location is to guarantee to locate rear jig and have unique a kind of init state by mode that multi-shaft interlocked workbench closes electric initial point is set.
Wherein, the part of described step a location at first is provided with the cutting starting point, and this cutting starting point is a bit to overlap with laser spot by certain that is provided with on the mouth of a river, and this point is the cutting starting point.
By employing programme-control working table movement and laser frequency, the mode of energy and the mode of operation of normal direction cutting, except reducing requirement to operating personnel, also guaranteed simultaneously the continuity of uniformity, otch and the circular arc dovetail of processing, improved cut quality, the scope of application of further expansion of laser light cutting, concrete effect is as follows:
1, guarantees the continuity of otch, the continuity of circular arc dovetail with the uniform motion of cutting automatically.
2, with high orientation precision and motion positions accuracy guarantee cutting accuracy.
3, the rapid movement with cutting automatically guarantees cutting efficiency.
4, guarantee the convenience of operation with the programming mode of teaching.
5, replace manual operations to guarantee the uniformity of processing with programme-control.
6, protect positive cut quality with the normal direction cutting method.
7, the method with the energy servo-actuated guarantees cut quality.
8, replace the die-cut adaptability widely that realizes with Laser Processing.
[description of drawings]
In conjunction with embodiment the present invention is further described with reference to the accompanying drawings.
Fig. 1 is the inventive method schematic diagram;
Fig. 2 is the inventive method flow chart;
Fig. 3 is a kind of application of the present invention---the mouth of a river, notebook computer shell space floor map;
Fig. 4 is a kind of application of the present invention---the mouth of a river, notebook computer shell space schematic perspective view.
[specific embodiment]
Be described further below in conjunction with the most preferred embodiment shown in each accompanying drawing.
The present invention relates to a kind of laser cutting method, a kind of system in combination that the enforcement of this method need be mentioned, as Fig. 1, this system in combination comprises: multi-shaft interlocked workbench, laser cutting machine, CCD process monitoring system 14, wherein, the requirements of process central control system 11 of entire method is regulated the kinetic control system 13 of the cutting path of control workbench, energy and the laser control system 12 of frequency and the program controlled software of carrying out each system of control laser cutting machine; In the present embodiment, laser cutting is the CO2 laser cutting machine.
Among the embodiment as described in Figure 1, described multi-shaft interlocked workbench is the four-axle linked workbench of XYZ-A, point-to-point speed on its difference X, Y, Z, the A direction realizes the moving cutting path output of XYZ-A tetrad respectively by servo-driver 1, servo-driver 2, servo-driver 3, servo-driver 4 controls.
Laser control system 12 is made up of laser energy control and laser frequency control.And the energy of laser and FREQUENCY CONTROL are to determine according to the movement velocity and the thickness of part.
Wherein, laser axis is perpendicular to cut surface, and laser spot is positioned on the cut surface.
Wherein, cutting head will with the cutting path established law to.
CCD process monitoring system 14 is used for the process of operating personnel in the cutting track teaching, guarantees that cutting head and cutting path established law are positioned on the cut surface perpendicular to cut surface and laser spot to, laser axis; In the cutting track program makeover process after teaching, be used to observe the cutting track form whether with the perfect match in the mouth of a river so that operating personnel revise the individual statements in the CNC program the faulty place of match.
Central control system 11 is by the allotment of control software realization to kinetic control system 13, laser control system 12, makes laser frequency, energy change with movement velocity and part thickness, has improved the cutting versatility of different-thickness part.
Kinetic control system 13 can be realized various rectilinear motions, circular motion, irregular curve motion interpolation by motion control software, and each movement velocity can be set respectively, can guarantee that movement velocity is even.
In the adjustment process of cutting path, cutting head attitude, relate to the method for a kind of teach programming and recording program therefor, i.e. cutting head attitude and the instantaneous velocity of putting on the recording curve one by one, and these data are connected form continuous cutting movement.Irregular curve on the track adopts the teaching of short line segment fitting process, promptly space curve is divided into some end to end short line segments, obtain an approximate space curve by this short line segment of teaching and replace real curve, the curve of match is infinitely close to true curve.
The flow chart of this laser cutting method as shown in Figure 2, concrete steps are as follows:
Step 1: diced system initialization
Four of the four-axle linked workbench of XYZ-A are replied initial point, set the workbench initial velocity, and the cutting machine parameters is set to minimum, and laser is in the lock light state.
Step 2: part is installed, clamping is located
Select to be installed and to locate clamping mode according to jig Design.
Wherein, the pinpoint method of part is for adopting the frock clamp of particular design, and the frock clamp of this particular design can be realized the stress deformation that part is located, can be corrected part again to a certain extent.One of characteristics of the frock clamp of this particular design are: the mode that location back compresses by the outside guarantees that anchor clamps and part fit fully, thereby realizes the location and correct and be out of shape; Two of the characteristics of the frock clamp of this particular design are: the mode of installing by machinery guarantees to locate the complete level of rear jig body; Three of the characteristics of the frock clamp of this particular design are: guaranteeing to locate the rear jig body by the mode that the four-axle linked workbench photoelectricity of XYZ-A initial point is set has unique a kind of init state, and no matter can be returned to this state, thereby guarantee the repeatability of processing through behind what kind of shuttling movement.
Step 3: cutting starting point setting
Regulate the four-axle linked workbench of XYZ-A and drive part movement, on the mouth of a river certain is a bit overlapped with laser spot, this point is set to cut starting point, the cutting starting point should be selected the wedge angle, flex point etc. on the path, the mouth of a river, if do not have wedge angle, flex point then should select beyond the mouth of a river, near certain the path is a bit to guarantee the cut quality at cutting head and the tail place.
Step 4: the cutting attitude is regulated, attitude updating
Proofread and correct cutting head and cutting path established law to, laser axis is perpendicular to cut surface, laser spot is positioned on the cut surface.
Step 5: cutting track teaching
For the regular curve on the cutting track, according to standard method teach programming and the logging program in the software, the irregular curve on the track then adopts the teaching of short line segment fitting process, and teaching whole piece cutting path also saves as the CNC program.
The method that relates to a kind of teach programming and recording program therefor in this process, this teach programming method by as give a definition: the supposition cutting path is the space curve that is linked to each other and to be constituted by many points, cutting head promptly is to walk a week along the point on the curve successively along curve week of walking, at each point, cutting head has unique attitude and instantaneous velocity, described teach programming method is cutting head attitude and the instantaneous velocity of putting on the recording curve one by one, and these data are connected form continuous cutting movement, teaching whole piece cutting path also saves as the CNC program.
Certainly for regular curves such as straight line, circular arc, elliptic arc, involutes, the software that uses can be realized motion fast with specific method, these ad hoc approach are widely used, but then must use the teach programming method to obtain for irregular space curve.
But for production, can not also unnecessary all points all be found out, for raising the efficiency, can adopt the short line segment fitting process, described short line segment fitting process is that space curve is divided into some end to end short line segments, obtain an approximate space curve by this short line segment of teaching and replace real curve, the curve of match is infinitely close to true curve.
Wherein, cutting track teaching process is guaranteed following 3 points by CCD process monitoring system monitoring: the one, cutting head and cutting path established law to, the 2nd, laser axis is perpendicular to cut surface, the 3rd, laser spot is positioned on the cut surface.
By adopting the four-axle linked workbench of XYZ-A that part is moved according to cutting path, because the four-axle linked workbench of XYZ-A can be realized four-axle linked interpolation; The four-axle linked workbench of XYZ-A can make part move according to space tracking; Working table movement speed is even; Remain the normal direction of cut direction in the working table movement process along cutting path.
Step 6: cutting track program correction
After teaching finishes, under laser instrument lock light state, call program and tentative cutting operation, promptly by CCD process monitoring system observe the cutting track form whether with the perfect match in the mouth of a river, can revise by the manual individual statements that changes in the CNC program for the faulty ground of match.
Step 7: cutting parameter is set, is adjusted
After correction finishes, requirement according to production efficiency is adjusted to desirable movement velocity to the four-axle linked workbench of XYZ-A, and---importing appropriate value in the speed of CNC program is set---inserts the statement that calls energy of lasers and frequency then in program, insert laser energy, frequency and function of speed, thereby realize laser energy and frequency servo-actuated with velocity variations.
Step 8: trial cut is also revised cutting parameter
Parameter is opened laser and is carried out trial cut after setting and finishing, according to the requirement check otch of cutting method.
Otch is preserved parameter after the assay was approved, called after product A cutting process, later name can and the like.
For with the cutting of a kind of mouth of a river, directly call cutting process and can finish cutting, if changed anchor clamps or product then need update program.
The otch disqualified upon inspection then needs to distinguish problem character, if track misfit and then forward aforementioned 6 steps to and revise track again, if laser parameter is provided with and badly then forwards aforementioned 7 steps to and reset parameter.
Step 9: be provided with and finish
Repeat above parameter assignment procedure, till otch is up to the standards, preserves final CNC program, name back and the file that is deposited into appointment are prepared against and are called at any time.
Step 10: change product
A kind of anchor clamps and program can only corresponding a kind of products, then need to change anchor clamps and reprogram if will change product.
Flow process finishes.
More than be the Overall Steps of this laser cutting method, according to above step, sum up following some advantage of this laser cutting method:
The first, this laser cutting method can improve the cutting versatility.
Adopt CO2Laser cutting machine replaces common cutting knife, because CO2Form a high temperature dot behind the Laser Focusing of laser cutting machine, high temperature dot moves along cutting path and is not subjected to the impact of path shape, can the accomplish linear cutting, curvilinear cut, improved the cutting versatility of difformity part; And by control software can realize that laser frequency, energy change with movement velocity, change with part thickness, improved the cutting versatility of different-thickness part.
The second, this laser cutting method can improve the cutting continuity.
What this laser cutting method adopted is the four-axle linked workbench of XYZ-A, can realize various rectilinear motions, circular motion, irregular curve motion interpolation by motion control software, and the movement velocity of each axle can be set respectively, can guarantee that movement velocity is even; And by adopting the teach programming method can guarantee to cut attitude all the time along the cutting path normal direction; Laser energy is servo-actuated with speed, thickness; More than 3 integrated use so that the cutting process velocity variations has continuity, energy variation has continuity, the cutting attitude changes and has continuity, therefore whole cutting process also has continuity.
Three, this laser cutting method can improve the cut lengths precision.
What this laser cutting method adopted is the four-axle linked workbench of XYZ-A, thereby replaces the manual operations of no precision to improve the cut lengths precision by high-precision mechanical movement.
Four, this laser cutting method can improve cutting efficiency.
Frock clamp by particular design is set, and what adopt is the integrated use of the four-axle linked workbench of XYZ-A, and the rear cutting of automatically finishing so that part is installed has reduced intermediate link; The steadily fast speed ratio manual operations of workbench efficient height.
Five, this laser cutting method can improve the cutting uniformity.
Frock clamp by particular design is set, employing be the four-axle linked workbench of XYZ-A, and the integrated use of the method such as energy is servo-actuated, so that all links of cutting process can be controlled, get rid of the uncontrollable factor in the manual operations, thereby improved the cutting uniformity.
Six, this laser cutting method can improve the cutting security.
Whole cutting process after the part of this laser cutting method is installed does not have personnel to intervene, and security improves greatly.
Seven, this laser cutting method can improve long-time stability.
Whole cutting process is all finished by equipment, and equipment can steady in a long-term move.
Discuss by appeal, the technique effect that the present invention reaches is:
1, guarantees the continuity of otch, the continuity of circular arc dovetail with the uniform motion of surface trimming;
2, with higher positioning accuracy and motion positions accuracy guarantee cutting accuracy;
3, the rapid movement with surface trimming guarantees cutting efficiency;
4, guarantee the convenience of operation with the programming mode of teaching;
5, replace manual operations to guarantee the uniformity of processing with programme-control;
6, protect positive cut quality with the normal direction cutting method;
7, the method with the energy servo-actuated guarantees cut quality;
8, replace the die-cut adaptability widely that realizes with Laser Processing.
Although with reference to the accompanying drawings; a kind of laser cutting method of the present invention is illustrated; but above-mentioned disclosed content only is in order to understand the present invention better; rather than limit the scope of claim by any way; so all according to the described method of patent claim of the present invention, feature and principle do etc. change or modify, be included in protection scope of the present invention.
Claims (5)
1. laser cutting method, this method is used to remove the moulding mouth of a river and the film-covered member mouth of a river, it is characterized in that, comprises the steps:
A, part location;
B, part move according to predefined cutting path, adopt multi-shaft interlocked workbench to make part keep cut direction to move along the cutting path normal direction, and cutting path adopt the method for teach programming and recording program therefor;
Wherein, suppose that cutting path is the space curve that is linked to each other and to be constituted by many points, cutting head promptly is to walk a week along the point on the curve successively along curve week of walking; At each point, cutting head has unique attitude and instantaneous velocity, described teach programming method is cutting head attitude and the instantaneous velocity of putting on the recording curve one by one, and these data are connected forms continuous cutting movement, and teaching whole piece cutting path also saves as the CNC program;
Wherein, irregular curve then adopts the teaching of short line segment fitting process; Described short line segment fitting process is that space curve is divided into some end to end short line segments, obtains an approximate space curve by this short line segment of teaching and replaces real curve, and the curve of match is infinitely close to true curve.
2. laser cutting method as claimed in claim 1 is characterized in that: the part of described step a location is to guarantee that by the mode that the outside compresses anchor clamps and part fit fully.
3. laser cutting method as claimed in claim 1 is characterized in that: the part location of described step a is to guarantee to locate the complete level of rear jig by the mode that machinery is installed.
4. laser cutting method as claimed in claim 1 is characterized in that: the part location of described step a is to guarantee to locate rear jig by the mode that multi-shaft interlocked workbench photoelectricity initial point is set to have unique a kind of init state.
5. laser cutting method as claimed in claim 1 is characterized in that: the part location of described step a at first is provided with the cutting starting point, and this cutting starting point is a bit to overlap with laser spot by certain that is provided with on the mouth of a river, and this point is the cutting starting point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102694396A CN102000916A (en) | 2010-08-31 | 2010-08-31 | Laser cutting method |
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| CN2010102694396A CN102000916A (en) | 2010-08-31 | 2010-08-31 | Laser cutting method |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464898A (en) * | 2013-08-30 | 2013-12-25 | 哈尔滨汽轮机厂有限责任公司 | Controlling method for dimensional accuracy of superalloy thin-walled molding piece |
| CN105528474A (en) * | 2015-11-27 | 2016-04-27 | 沈阳飞机工业（集团）有限公司 | A method of fitting broken lines into a circular arc for aircraft template laser cutting programming graphics |
| CN106808086A (en) * | 2015-11-27 | 2017-06-09 | 南京魔迪多维数码科技有限公司 | Three-dimensional crisp and hard material localization method and system of processing in multiaxial motion laser system |
| CN106944676A (en) * | 2017-02-23 | 2017-07-14 | 中国核工业第五建设有限公司 | The method that gate installation hole is opened up on the cylinder of steel containment vessel of nuclear power station |
| CN107914084A (en) * | 2017-11-16 | 2018-04-17 | 惠州市契贝科技有限公司 | Curved sheets and its method for laser welding, laser welding system |
| CN107914081A (en) * | 2017-11-16 | 2018-04-17 | 惠州市契贝科技有限公司 | The method and welder of carbon dioxide laser welding |
| CN107931830A (en) * | 2017-11-16 | 2018-04-20 | 惠州市契贝科技有限公司 | Method for laser welding, aluminium sheet and laser welding apparatus |
| CN105528473B (en) * | 2015-11-27 | 2019-01-11 | 沈阳飞机工业（集团）有限公司 | The connectivity checks method of aircraft template laser cutting programming figure |
| CN110405363A (en) * | 2019-08-09 | 2019-11-05 | 佛山市镭科智能设备有限公司 | A kind of processing method of profile shapes |
| CN111037095A (en) * | 2018-10-12 | 2020-04-21 | 通快机床两合公司 | Machine for separating plate-shaped workpieces |
| CN111843241A (en) * | 2020-08-21 | 2020-10-30 | 苏州米尔精密仪器设备有限公司 | Laser cutting method for flexible screen of mobile phone |
| CN113917886A (en) * | 2021-10-18 | 2022-01-11 | 深圳市睿达科技有限公司 | Motion control method and device and computer readable storage medium |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464898A (en) * | 2013-08-30 | 2013-12-25 | 哈尔滨汽轮机厂有限责任公司 | Controlling method for dimensional accuracy of superalloy thin-walled molding piece |
| CN103464898B (en) * | 2013-08-30 | 2015-04-22 | 哈尔滨汽轮机厂有限责任公司 | Controlling method for dimensional accuracy of superalloy thin-walled molding piece |
| CN105528473B (en) * | 2015-11-27 | 2019-01-11 | 沈阳飞机工业（集团）有限公司 | The connectivity checks method of aircraft template laser cutting programming figure |
| CN106808086A (en) * | 2015-11-27 | 2017-06-09 | 南京魔迪多维数码科技有限公司 | Three-dimensional crisp and hard material localization method and system of processing in multiaxial motion laser system |
| CN105528474A (en) * | 2015-11-27 | 2016-04-27 | 沈阳飞机工业（集团）有限公司 | A method of fitting broken lines into a circular arc for aircraft template laser cutting programming graphics |
| CN106944676A (en) * | 2017-02-23 | 2017-07-14 | 中国核工业第五建设有限公司 | The method that gate installation hole is opened up on the cylinder of steel containment vessel of nuclear power station |
| CN106944676B (en) * | 2017-02-23 | 2018-11-09 | 中国核工业第五建设有限公司 | The method that gate installation hole is opened up on the cylinder of steel containment vessel of nuclear power station |
| CN107914084A (en) * | 2017-11-16 | 2018-04-17 | 惠州市契贝科技有限公司 | Curved sheets and its method for laser welding, laser welding system |
| CN107914081A (en) * | 2017-11-16 | 2018-04-17 | 惠州市契贝科技有限公司 | The method and welder of carbon dioxide laser welding |
| CN107931830A (en) * | 2017-11-16 | 2018-04-20 | 惠州市契贝科技有限公司 | Method for laser welding, aluminium sheet and laser welding apparatus |
| CN111037095A (en) * | 2018-10-12 | 2020-04-21 | 通快机床两合公司 | Machine for separating plate-shaped workpieces |
| CN110405363A (en) * | 2019-08-09 | 2019-11-05 | 佛山市镭科智能设备有限公司 | A kind of processing method of profile shapes |
| CN111843241A (en) * | 2020-08-21 | 2020-10-30 | 苏州米尔精密仪器设备有限公司 | Laser cutting method for flexible screen of mobile phone |
| CN113917886A (en) * | 2021-10-18 | 2022-01-11 | 深圳市睿达科技有限公司 | Motion control method and device and computer readable storage medium |
| CN113917886B (en) * | 2021-10-18 | 2024-04-12 | 深圳市睿达科技有限公司 | Motion control method, motion control device and computer readable storage medium |
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Application publication date: 20110406 |