JP2004114112A - Method and apparatus for marking on transparent curved surface - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately arrange, on a transparent surface, with marking data profiled for an individual outer circumferential shape and also to make a uniform marking possible on a curved surface, for example, in marking on a transparent hard plate having a curved surface like eyeglasses. <P>SOLUTION: The marking device is composed of a marking controller 1, a computer 2 for performing inputting and processing of data between it and the controller, a fixing tool 3 for fixing, in a desired posture, a workpiece 4 having a curved hard plate like eyeglasses, and a nonclarifying means 5 for temporarily nonclarifying the workpiece 4. In the marking controller 1, there are installed a marking head 11 and a profile reading head 12. With the workpiece 4 fixed in a prescribed posture with the fixing tool 3, the outer circumferential profile of the workpiece 4 is read by the profile reading head 12. On the basis of the outer circumferential profile data, the marking data is processed. The workpiece 4 is temporarily nonclarified by the nonclarifying means 5, and irradiated at the marking part with a reference beam from the marking head 11, with the marking head 11 thereby positioned to irradiate the marking part with a laser beam for marking. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a method of imprinting a name, logo, etc. on a transparent hard plate having a curved surface such as glasses by a laser engraving device, such as a name in an arbitrary shape within a predetermined area of a curved surface The present invention relates to a marking method and a marking device for accurately marking a mark.
[0002]
[Prior art]
Traditionally, when marking characters, designs, logos, etc. on the surface, regardless of whether they are soft or hard materials, the processing was performed using laser light, which had been mechanically ground with a tool with a hard tip. Due to the improvement in technology, a marking method in which a laser beam is irradiated from a marking head or the like has been generalized. The advantage of this laser marking method is that the energy per dot can be finely controlled, so that precise marking is possible. In addition, by inputting data and automating and engraving, it can be engraved according to the material, so there are fewer failures. Furthermore, it is also possible to process data such as photographs and apply a three-dimensional stamp.
[0003]
With such laser marking technology, it is generally easy to mark a flat surface. If it is a flat surface, the marking data is input to the laser marking device, so that the laser head can move in only two dimensions and perform uniform and accurate marking, making it possible to carry out complicated and precise marking as described above. I have to.
[0004]
Also, when marking the desired position by controlling the laser marking device, it is important to position the marking head and so on. Check the marking start position and end position, etc. Then, it is necessary to enter the stamping operation. Generally, a contact type and a non-contact type are used, but a non-contact type is desirable for engraving a material whose surface is easily damaged, and is mainly performed by irradiating visible reference light.
In this case, when the material is a material that transmits light, a technology is also known in which a reflective film is formed on the surface of the material and laser processing is performed by irradiating laser light toward the interface between the reflective film and the transparent material. However, for example, a substance that absorbs light is provided in the vicinity of a material that transmits light with a predetermined gap, and this substance is irradiated with laser light to evaporate or sublimate the irradiated part. A laser processing technique is also known in which a sublimate is deposited on the surface of a transmissive material. (For example, refer to Patent Document 1).
[0005]
[Patent Document 1]
JP-A-60-61193 [0006]
In some cases, it may be necessary to process the stamp data in accordance with the shape of the stamp. For example, when the outer peripheral shape is curved, it is necessary to input the marking data processed so as to follow the curved shape to the laser marking device.
[0007]
[Problems to be solved by the invention]
However, as described above, marking on a flat surface is easy, but for a surface having a curved surface, the data of the curved surface is sufficient, and if the control according to the data cannot be performed, it is uniform. It is difficult to make a stamp.
[0008]
In addition, a material that absorbs light is placed close to a material that transmits light, with a predetermined gap, and this material is irradiated with laser light to evaporate or sublimate the irradiated portion, thereby evaporating or sublimating. The technique of depositing an object on the surface of a permeable material does not directly imprint on a transparent resin, a lens, or the like.
[0009]
Furthermore, for example, when processing the marking data in a portion along the peripheral edge of a lens or the like of spectacles, the outer shape data is required, but the individual shapes of the spectacles and the like are different, and if each data is not acquired, It cannot be converted into imprint data that accurately follows the outer shape. If the imprint data cannot be accurately obtained, not only the imprint of the imprint is bad, but there is a concern that the spectacles may cause visual impairment.
[0010]
Therefore, the present invention, for example, for a transparent hard plate having a curved surface, such as glasses, accurately positions the transparent hard plate at a predetermined position with imprinted data following each outer peripheral shape, and is uniform on the curved surface. An object of the present invention is to provide a marking method and a marking device for a transparent curved hard plate capable of performing simple marking.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a method for performing arbitrary marking on a transparent curved hard plate using a laser marking device, the normal line of the substantially central portion of the stamped portion of the curved hard plate and the laser irradiation direction. The hard plate is fixed so that they substantially match, the outer shape of the hard plate is read, the marking data is processed so as to fit within a predetermined region within the outer shape, and the processed marking data is processed by the laser marking. Input to the device, the surface or back of the curved hard plate is temporarily made non-transparent, and the marking head is positioned by irradiating the reference light toward the marking portion, and then laser light is emitted from the marking head. And imprinted.
[0012]
And, by fixing the hard plate so that the normal line of the substantially central part of the engraved part of the curved hard plate and the laser irradiation direction are almost coincident, the curved surface can be fixed in the state closest to the flat surface. Obtain the outer shape of the plate, process the stamp data so that it fits within the specified area within the outer shape, and use the reference data on the curved surface that is temporarily made non-transparent based on the processed stamp data. If the arrangement and the like are confirmed by irradiation, it becomes possible to uniformly mark the exact position in the desired area.
Here, the predetermined region in the outer shape of the hard plate is different depending on the type of the workpiece, such as a peripheral portion that follows the outer peripheral shape in a spectacle lens or the like.
Incidentally, it is preferable that the above-described procedure is programmed automatically by a computer or the like, because the processing is automatically performed.
[0013]
According to claim 2, in a marking device that performs arbitrary marking using a laser beam on a transparent curved hard plate, a marking head that irradiates laser light, and the curved hard plate at a predetermined position on the laser irradiation direction side. A shape fixing means for reading the outer shape of the curved hard plate, a data processing means for processing the marking data so as to be within a predetermined region in the outer shape, and the surface of the curved hard plate Alternatively, a non-transparent means for temporarily making the back surface a non-transparent surface may be provided, and the fixture may change the direction of the hard plate so that the normal line of the substantially central portion of the stamped portion substantially coincides with the laser irradiation direction. In addition, the marking head is provided with a light emitting portion that can emit positioning reference light toward the marking portion.
[0014]
As a result, the marking method described in claim 1 can be further automated as a specific means, and can be easily and accurately marked at a desired position on the curved hard plate without requiring skill.
Here, as a reading means for reading the outer shape, for example, OCR, a semiconductor image sensor, a TV camera, etc. can be applied, and the surface or back surface of the curved hard material is temporarily made non-transparent. As a means, a sheet to be covered from above, a means for forming a film on the surface or the like can be applied.
Further, as a light emitting means for positioning reference light, for example, a pen-type beam light or other spot beam light can be used.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a block diagram for explaining the basic configuration of the marking device according to the present invention, FIG. 2 is a flowchart for explaining the marking method according to the present invention, and FIG. 3 shows another embodiment of the marking method according to the present invention. It is a flowchart to explain.
That is, the basic configuration of the marking device according to the present invention includes a marking control unit 1, a computer 2 that inputs and processes data between the marking control unit 1, and a workpiece 4 that includes a curved hard plate such as glasses. A fixing tool 3 for fixing and non-transparent means 5 for temporarily making the workpiece 4 non-transparent are formed. The marking control unit 1 includes a light emitting unit for emitting positioning irradiation light and an actual marking. A marking head 11 provided with a laser irradiating part when performing, and a shape reading head 12 for reading the outer peripheral shape of the workpiece 4 are provided.
[0016]
The fixture 3 includes a holding portion for mounting and holding the workpiece 4 and a base of the fixture 3, and the holding portion and the base correspond to the shape of the workpiece 4. You can change your posture. Then, by changing the holding portion and the base of the fixture 3, the workpiece 4 is fixed so that the normal line at the substantially center of the stamped portion of the workpiece 4 substantially coincides with the irradiation direction of the laser beam. It has been made possible.
[0017]
The non-transparent means 5 may be applied to the upper surface side or applied to the bottom surface side depending on the form of the work piece 4, but is properly used depending on the thickness of the work piece 4. What is applied to the upper surface side is easy to handle and can be positioned more accurately, but it must be removed at the time of engraving. What is applied to the bottom side does not need to be removed at the time of engraving, but is difficult to handle, and positioning errors may increase depending on the thickness of the workpiece 4. Therefore, a light shielding sheet type that can be easily removed is suitable for the top surface side, and a film forming type by spraying or the like is suitable for the bottom side.
[0018]
Next, a marking method using this marking device will be described with reference to FIG.
(1) As described above, the workpiece 4 is held by the fixture 3 and fixed at a predetermined position.
(2) The shape reading head 12 reads the outer shape of the workpiece 4 and inputs the outer shape data to the computer 2.
(3) Marking data such as characters to be stamped is input to the computer 2 from a keyboard or the like.
(4) Based on the outer shape data, the stamp data is processed so that the shape follows the outer shape data, and it is verified that the processed data is actually the outer shape, and processed until appropriate. Is done. For example, it is preferable to construct dedicated software or the like, and this processing is performed with reference to a display device or the like as necessary.
(5) The processed data is input to the marking control unit 1.
(6) The surface of the workpiece 4 is temporarily made opaque by the non-transparent means 5.
(7) Based on the input processing data, the marking head 11 irradiates the marking portion of the workpiece 4 with reference light for positioning. Adjustment is performed while confirming the irradiation position, and the marking head 11 is positioned so that the marking position is appropriate. At this time, the focus is also confirmed.
(8) When the positioning is completed, the non-transparent means 5 is removed if necessary, and laser light is irradiated from the marking head 11 to mark the marking portion of the workpiece 4.
Each procedure as described above is programmed in advance and input to a computer so that it can be processed automatically.
[0019]
According to the above procedure, even if the outer peripheral shape of the spectacle lens or the like is different, with the marking data imitating each outer peripheral shape, it can be appropriately arranged and stamped at locations along the outer peripheral edge, In addition, the curved surface can be uniformly engraved with a state close to a flat surface.
[0020]
The present invention is not limited to the above embodiment. What has substantially the same configuration as the matters described in the claims of the present invention and exhibits the same operational effects belongs to the technical scope of the present invention.
For example, the workpiece 4 is not limited to a spectacle lens, and the stamped portion is not limited to a location along the outer periphery of the workpiece 4.
[0021]
In addition, as shown in FIG. 3, the final positioning and the shape of the marking are further improved by programming so that the processing data of the marking is re-processed and the position adjustment of the marking head 11 is relatively performed in the final stage. It can also be engraved in precise form and precisely matched.
[0022]
【The invention's effect】
As described above, in the present invention, the hard plate is fixed so that the normal line of the substantially central portion of the engraved portion of the curved hard plate and the laser irradiation direction substantially coincide with each other, and the outer shape of the curved hard plate is read. After processing the marking data so that it falls within a predetermined area, the reference surface is irradiated to the curved surface that is temporarily made non-transparent based on the processed marking data to confirm the arrangement and the like. Therefore, the marking data can be accurately arranged at a predetermined position on the transparent surface and can be uniformly stamped.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating the basic configuration of a marking device according to the present invention. FIG. 2 is a flowchart illustrating a marking method according to the present invention. FIG. 3 illustrates another embodiment of the marking method according to the present invention. Flow chart [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Marking control part, 2 ... Computer, 3 ... Fixing tool, 4 ... Workpiece, 5 ... Non-transparent means, 11 ... Marking head, 12 ... Shape reading head.

Claims (2)

A method for performing arbitrary marking on a transparent curved hard plate using a laser marking device, wherein the normal of the substantially central portion of the stamped portion of the curved hard plate and the laser irradiation direction substantially coincide with each other. A step of reading the outer shape of the hard plate, processing the marking data so as to fit within a predetermined area in the outer shape, and inputting the processed marking data to the laser marking device And a step of positioning the marking head by irradiating a reference light toward the marking portion by temporarily setting the front or back surface of the curved hard plate as a non-transmissive surface, and irradiating a laser beam from the marking head A stamping method comprising a stamping step. A marking device that performs arbitrary marking using a laser beam on a transparent curved hard plate, a marking head that irradiates laser light, and a fixture that fixes the curved hard plate at a predetermined position on the laser irradiation direction side A shape reading means for reading the outer shape of the curved hard plate, a data processing means for processing the marking data so as to fit within a predetermined region in the outer shape, and a front surface or back surface of the curved hard plate is temporarily Comprises a non-transparent means for making a non-transparent surface, and the fixture is adapted to change the orientation of the hard plate so that the normal line of the substantially central portion of the stamped portion can substantially coincide with the laser irradiation direction, Further, the marking head is provided with a light emitting unit capable of irradiating a reference light for positioning toward a marking portion.

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