KR100971222B1 - Device for marking on large size panel by laser using linear motor and method for controlling the same - Google Patents

Abstract

The flat plate laser marking device using a linear motor includes a surface plate provided in the support frame, a gantry moving unit configured to be movable along one side of the support frame, a gantry connected to the gantry moving unit, and a movable gantry. It comprises a laser marking head for repeatedly laser marking by dividing the image marked on the plate into a plurality. According to the large flat laser marking apparatus and the control method using the linear electric motor configured as described above, the image can be marked on the large flat plate by dividing the image into a plurality of images and continuously marking them, and by using the linear motor, There is an advantage that can improve the position accuracy.

Description

Flat plate laser marking device using linear motor and its control method {DEVICE FOR MARKING ON LARGE SIZE PANEL BY LASER USING LINEAR MOTOR AND METHOD FOR CONTROLLING THE SAME}

The present invention relates to a large flat plate laser marking apparatus using a linear motor and a control method thereof, and more particularly, to a laser marking apparatus for laser marking an object of a large flat plate using a laser marking head moving by a linear motor. The control method is related.

Laser marking, which is generally used, is a method of marking a desired character or figure by melting or removing part of the surface of an object using a laser beam as a light source, or by discoloring it. A marking method using an existing ink jet printer or silk printing Compared with the laser beam as a direct processing means, the contactless, permanent marking is possible, there is no fear of erasing, and there are various advantages such as high precision and clear marking.

The laser marking method includes a scanning type (or pen type) marking method in which a laser beam focused to a small spot is scanned with a galvano mirror, and the laser beam is irradiated, and a desired character or figure is displayed. Patterns are formed on the mask in advance, and the laser beam that has passed through the mask is formed on the surface of the object by using a lens system or the like to distinguish the mask type marking method in which the pattern portion is marked. It is used in fields such as high quality marking and engraving.

In recent years, laser marking has become common in order to form a certain shape. However, the conventional laser marking apparatus is not manufactured in a size suitable for a large flat plate, so that the marking cannot be performed as a whole, and the desired shape is marked by connecting the laser marking partially.

However, the conventional laser marking apparatus moves the laser marking head by a ball screw method as shown in FIG. 2, but in the case of the ball screw, mechanical accuracy of the ball screw expands and increases due to frictional heat. . In addition, accurate position movement is impossible due to a backlash phenomenon caused by the movement of the head.

If the positional accuracy of the laser marking head is not constant as described above, there is a problem in that the marking quality is degraded since the partially marking portions are not smoothly connected as shown in FIG. 1.

The present invention is to solve such a conventional problem, it is an object of the present invention to provide a laser marking device suitable for laser marking of a large flat plate.

Another object of the present invention is to improve the marking quality by keeping the positional accuracy of the laser marking head constant.

According to a feature of the present invention for achieving the above object, a large flat plate laser marking apparatus using a linear electric motor of the present invention includes a support frame; A base plate provided on the support frame and on which a disc is seated; A gantry moving unit provided at both ends of the support frame and configured to move along a longitudinal direction of the support frame by a linear electric motor; At least one gantry supported by the gantry moving unit and moving by the gantry moving unit; and configured to be movable along the gantry, and including a laser marking head for forming a marking on a disc using a laser. desirable.

The gantry moving unit of the present invention includes a moving unit frame provided at both ends of the support frame; Moving rails provided at both ends of the moving unit frame; A stator provided in the mobile unit frame; Preferably, the slider includes a slider moving along the moving rail, and a mover provided on the slider.

The moving rail of the present invention is preferably composed of an LM guide.

The moving unit frame of the present invention preferably includes a damper for preventing a collision of the slider.

The laser marking head of the present invention is preferably configured to be movable in the vertical direction.

The laser marking head of the present invention includes a head support connected to the gantry to be movable along the gantry; A moving rod provided in the vertical direction in the head support portion; and a laser marking unit connected to the moving rod to move in the vertical direction, the laser marking.

The surface plate of the present invention preferably includes a moving portion for allowing the disc to be drawn in or taken out along the upper surface of the surface plate.

It is preferable that the moving part of this invention consists of balls which protrude selectively to the upper surface of the said surface plate.

The laser marking head of the present invention preferably divides an image to be marked on a disc into marking regions to repeatedly mark a plurality of divided regions.

The control method of the large flat plate laser marking apparatus using the linear motor of this invention is a laser marking apparatus of any one of Claims 1-8 which consists of a large flat plate and is driven by a linear motor, The loading of a disc A disc alignment step of aligning the discs by sensing the discs; A disc measuring step of measuring the size and thickness of the loaded disc; A laser marking step of dividing the image to be marked on the disc into a plurality of areas to repeatedly mark the divided area using a laser; and an end step of unloading the marked disc.

In the disc alignment step of the present invention, it is preferable to initialize the X-axis, the Y-axis and the Z-axis before the disc is loaded, and to drive the moving unit when the disc is loaded so that the disc is aligned.

In the disc measuring step of the present invention, it is preferable to position the laser marking head in the marking area according to the size and thickness of the disc measured.

According to the large flat laser marking apparatus using the linear motor according to the present invention and a control method thereof, the image can be marked on the large flat plate by dividing a plurality of images marked on the large flat plate and continuously marking the linear flat motor. By using to improve the positional accuracy of the laser marking head has the advantage of improving the accuracy of the connection portion due to the continuous operation of the image and marking a better image.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a large flat plate laser marking apparatus and a control method using a linear motor according to the present invention will be described in detail.

3 to 8 show a preferred embodiment of a large flat plate laser marking apparatus using a linear motor according to the present invention.

As shown, the surface plate 10 of a large flat plate is provided, and the surface plate 10 is supported by the support frame 11. One side of the surface plate 10 is provided with a disc loading portion 13 to which the disc formed of a large flat plate such as an elevator door can be carried in and out.

In addition, the plate 10 may be provided with a moving unit 15 for smoothly moving the disc drawn through the disc loading unit 13 along the upper surface of the plate 10. The moving part may be composed of a ball, a moving roller or a conveyor device that selectively protrudes from the upper surface of the surface plate 10.

In addition, the surface plate 10 may be provided with a measuring sensor (not shown) capable of sensing the size and height of the disk seated on the surface of the surface plate 10 and sensing that the disk is inserted into the surface plate 10. Can be. By measuring the size of the disc by the measuring sensor it is possible to laser marking at the correct position.

The upper surface of the support frame 11 provided on both sides of the surface plate 10 is provided with a gantry moving unit 20 for moving the gantry 40 to be described below. The gantry moving unit 20 is configured as a linear motor.

The linear motor refers to an electric motor having a structure that generates a thrust between a mover and a stator facing in a straight line. The linear motor has no mechanical contact portion and thus has low noise, and there is no rotating part, so oil or lubricating oil is not scattered, so it is relatively clean compared to the ball screw method, and the thermal conductivity is extremely small, thereby maintaining high positioning.

As shown in FIG. 6, the gantry moving unit 20 includes a moving unit frame 21 provided on an upper surface of the support frame 11. In addition, the moving unit frame 21 is provided with a moving rail 23 for moving the slider 30 to be described below. The moving rails 23 may be configured of the same as the LM guide, and two moving rails 23 may be spaced apart at predetermined intervals from the upper surface of the support frame 11.

Then, the stator 25 is provided on the lower surface of the mobile unit frame 21. The stator 25 interacts with the mover 31 provided in the slider 30 moving along the move rail 23.

The slider 30 moves the gantry 40 in a predetermined direction while moving along the moving rail 23 by the electromagnetic force and the frequency variation between the stator 25 and the mover 31. The slider 30 is coupled to the movable rail 23, and a seating surface 33 on which the gantry 40 may be seated is formed on an upper surface of the slider 30.

In addition, dampers 35 are provided at both ends of the mobile unit frame 21 so that the slider 30 does not collide with both ends of the mobile unit frame 21.

Both ends of the gantry 40 are respectively seated on the gantry moving unit 20 provided at both ends of the support frame 11. Both ends of the gantry 40 are seated on the gantry moving unit 20 to move in a predetermined direction from above the surface plate 10.

As shown in FIG. 3, one or more gantry 40 may be provided in the gantry moving unit 20, but is preferably composed of one gantry 40. The gantry 40 is coupled to the gantry moving unit 20 and configured to move along the longitudinal direction of the surface plate 10.

The gantry 40 is provided with a laser marking head 50 for laser marking on a large plane. The laser marking head 50 is coupled to one surface of the gantry 40 and configured to move along the longitudinal direction of the gantry 40.

The laser marking head 50 includes a head support 51 coupled to one surface of the gantry 40. The head support part 51 is also provided with a linear motor so that the head support part 51 can move along the longitudinal direction of the gantry 40.

The head support 51 is provided with a laser marking unit 53, and the laser marking unit 53 is movable in a vertical direction along a moving rod 55 provided in a direction perpendicular to the head support 51. It is composed.

The laser marking unit 53 is provided with a lens (not shown) for emitting a laser. The lens provided in the laser marking unit 53 uses an F-theta lens, and the working range of one cycle of the F-theta lens is structurally limited.

In other words, when the F-theta 254 lens is adopted, the maximum size that can be worked has an area of about 150 mm * 150 mm, but in the case of image marking, the area of about 120 mm * 120 mm considering the distortion of the lens tip Can be processed.

Therefore, when marking an image out of the lens area on the original plate, it is possible to mark an image of a desired size by editing the image to fit the available range and repeating the edited image.

Hereinafter, the operation of the large flat plate laser marking apparatus using the linear motor according to the present invention having the configuration as described above will be described in detail.

When the laser marking operation starts, the laser marking device initializes the X, Y and Z axes. Then, when the disc is introduced into the disc loading portion 13 of the base plate 10, the measuring sensor detects the input of the disc to operate the moving unit 15. The ball-type moving part 15 protrudes and rotates on the upper surface of the surface plate to seat the disc on the upper surface of the surface plate 10.

When the disc is seated on the upper surface of the surface plate 10, the measuring sensor senses whether the original plate is correctly seated on the upper surface of the surface plate 10. Then, when the disc is aligned on the upper surface of the surface plate 10, the measurement sensor measures the length of the disc in the X-axis, Y-axis and Z-axis direction to extract information about the disc.

When the information on the disc is extracted by the measuring sensor, the area to be marked on the disc is determined and the laser marking head 50 is positioned at the corresponding position. The laser marking head 50 moves along the gantry 40 and the gantry moving unit 20 to a marking position.

As described above, since the lens provided in the laser marking head 50 cannot perform laser marking beyond a certain region, as shown in FIG. 8, after dividing a large sized image into a plurality of regions, each region is repeated. Mark the full size by marking.

For example, after dividing an image into four images, a large sized image may be marked by marking one region and subsequently marking the next region. At this time, since the size of the laser spot (laser spot) is about 80μm, it is possible to mark a high-precision image by moving the laser marking head 50 exactly as the size unit of the laser spot. 9 shows a state in which the marking device according to the present invention is correctly connected without the heterogeneity of the interface.

When the divided image is continuously marked as described above and the entire image is completed, the marking operation is completed by unloading the original plate.

In the scope of the basic technical spirit of the present invention, many modifications are possible to those skilled in the art, and the scope of the present invention should be interpreted based on the claims which will be described later. .

According to the flat plate laser marking apparatus and the control method using the linear motor according to the present invention as described in detail above has the following advantages.

There is an advantage in that the image can be marked on the large flat plate by dividing the image marked on the large flat plate into a plurality.

In addition, by using a linear motor, the positional accuracy of the laser marking head is improved, so that the accuracy of the connection part due to the continuous operation of the image is improved and the better image can be marked.

1 is a working state showing a state marked by the laser marking device according to the prior art.

Figure 2 is a perspective view showing a ball screw used in the laser marking apparatus according to the prior art.

Figure 3 is a perspective view according to a preferred embodiment of a large flat plate laser marking apparatus using a linear motor according to the present invention.

4 is a plan view of FIG.

5 is a side view of FIG. 3;

Figure 6 is a perspective view showing a gantry moving unit of a large flat plate laser marking device using a linear electric motor according to the present invention.

Figure 7 is a partial perspective view showing a laser marking head of a large flat plate laser marking device using a linear electric motor according to the present invention.

8 is a partial front view showing a state of marking an image by a large flat plate laser marking apparatus using a linear motor according to the present invention.

9 is a working state diagram enlarged by an electron microscope the interface of the image marked by a large flat plate laser marking device using a linear motor according to the present invention.

10 is a flowchart showing a method of controlling a large flat plate laser marking apparatus using a linear motor according to the present invention in order.

Description of the Related Art [0002]

10: surface plate 11: support frame

15: moving unit 20: gantry moving unit

21: moving unit frame 23: moving rail

25: Stator 30: Slider

31: mover 35: damper

50: laser marking head 51: head support

53: laser marking unit 55: moving rod

Claims (12)

Support frame; A base plate provided on the support frame and on which a disc is seated; A gantry moving unit provided at both ends of the support frame and configured to move along a longitudinal direction of the support frame by a linear electric motor; At least one gantry supported by the gantry moving unit and moving by the gantry moving unit; A laser marking head configured to be movable along the gantry, the laser marking head forming a marking on a disc using a laser, By detecting the loading of the disc on the surface plate and aligning the disc, the size and thickness of the loaded disc are measured, the image to be marked on the disc is divided into a plurality of areas, and the divided areas are repeatedly repeated using the laser marking head. Marking Large flat plate laser marking device using a linear motor. The method of claim 1, The gantry moving unit A mobile unit frame provided at both ends of the support frame; Moving rails provided at both ends of the moving unit frame; A stator provided in the mobile unit frame; A slider moving along the moving rail; and Including a mover provided in the slider Large flat plate laser marking device using a linear motor. The method of claim 2, The moving rail is LM guide Large flat plate laser marking device using a linear motor. The method of claim 2, The mobile unit frame It includes a damper for preventing the collision of the slider Large flat plate laser marking device using a linear motor. The method of claim 1, The laser marking head Configured to be movable in the vertical direction Large flat plate laser marking device using a linear motor. The method of claim 5, The laser marking head A head support connected to the gantry to be movable along the gantry; A moving rod provided vertically to the head support; and A laser marking unit connected to the moving rod and moving up and down and performing laser marking; Large flat plate laser marking device using a linear motor. The method of claim 1, The plate is It includes a moving portion for allowing the disc to be drawn in or taken out along the upper surface of the surface plate Large flat plate laser marking device using a linear motor. The method of claim 7, wherein The moving part Composed of a ball (ball) selectively protruding to the upper surface of the surface plate Large flat plate laser marking device using a linear motor. delete delete delete delete

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