WO2018101584A1

WO2018101584A1 - Laser engraving machine having automatic feeding and focusing function

Info

Publication number: WO2018101584A1
Application number: PCT/KR2017/010112
Authority: WO
Inventors: 주재성; 호범석
Original assignee: 주식회사 알이디테크놀로지
Priority date: 2016-11-29
Filing date: 2017-09-15
Publication date: 2018-06-07
Also published as: KR101938812B1; KR20180060516A

Abstract

The present invention relates to a laser engraving machine having an automatic feeding and focusing function, the laser engraving machine performing height measurement and automatic laser focusing for a material automatically fed in a conveyor manner, so as to enable process speed, machining precision, and convenience to be increased even though a plurality of various workpieces are machined.

Description

Laser Engraver with Automatic Feeding and Focusing

The present invention relates to a laser engraver, and in detail, the automatic supply that can increase the process speed, processing precision and convenience even if a large number of processing materials are processed by performing a height measurement and automatic focusing of the laser to the material automatically supplied by the conveyor method And a laser engraver having a focusing function.

A laser engraver is a device that generates letters, symbols, patterns, or pictures with a laser beam on various materials such as wood, plastic, metal, stone, or glass.The laser engraver and optical system for generating a laser beam, the direction, intensity, It includes a control device for controlling the moving speed, distribution and the like, the laser workpiece is moved in the XY direction from the fixed work material is generally processed to form the work material.

In addition, for precise processing, the material is fixed with a vice so that the material does not shake during processing. In this case, accurate alignment of the material with respect to the position of the laser module is required. In this case, since the operator performs the work of sorting and fixing the workpiece by hand, the work efficiency is very low. In order to precisely adjust the focusing length, which is an important factor in the processing using laser, to input the height measurement result of the material directly, There was discomfort.

Therefore, when a large amount of the same work is performed, a method of supplying the material through an automatic supply means such as a conveyor method is also used.However, when the work is finished, the fixing means for fixing the material and the focusing length for the processing are initialized and then the work is performed. There was still inconvenience such as resetting to the value accordingly.

Related patents in this regard include Japanese Patent No. 5459255 (2014.01.24.).

The present invention was created to solve the above problems, an object of the present invention is to perform an automatic continuous supply and processing of the material, to measure the height of the input material using the camera and to perform automatic focusing of the laser. It is to provide a laser engraver with automatic feeding and focusing function to increase the processing speed, processing precision and convenience when processing a variety of processing materials.

To this end, the present invention is a laser engraver having a laser oscillator and an optical system comprising a laser module unit for emitting a laser beam for processing, and a first transfer unit for moving the laser module unit in the XY axis direction according to a control signal. And a second transfer unit configured to output a display laser in addition to the processing laser, and to adjust a focusing position by moving the laser module unit in the Z-axis direction according to a control signal; Fixing jig unit for temporarily fixing the workpiece; A conveyor unit having a plurality of coupling belts having a plurality of coupling parts detachable from the fixing jig at a predetermined interval, and a driven roller and a driving roller rotating the conveyor belt in one direction; A camera unit photographing a spot formed on a workpiece through the laser for processing; A first calculation unit for analyzing the image photographed by the camera unit and calculating a height of a target material and a focusing value of the laser module unit by analyzing a spot position of a display laser formed by classifying a material not installed, a reference material, and a processed material; A control unit which receives power and controls the laser module unit and the first transfer unit and performs processing, and controls the second transfer unit by reflecting the focusing value; Characterized in that consists of.

At this time, the second operation unit for analyzing the image taken by the camera unit to calculate the correction value for the reference position by photographing the position of the workpiece according to the machining position; Further comprising, the control unit may be configured to align and transfer the target material by controlling the conveyor to reflect the correction value.

In addition, the coupling portion protrudes upward, but the upper portion is made of a first coupling projection of the expanded shape, the fixing jig portion is coupled to the second coupling projection to the first coupling projection on the lower side, the second by an external operation The coupling protrusion may be provided to move away from the first coupling protrusion.

In addition, the control unit is located on the rear side of the conveyor portion and the fixing jig coupled to the conveyor belt is transferred to the operation unit for operating the separation unit, the fixing jig is separated from the conveyor belt and the seating portion and the seating portion is extended A recovery part including a slide part for sliding the seated fixing jig part to the rear side; It may further include.

In the process of continuously processing a small workpiece through the present invention, it is possible to simplify the process as the supply of the material is made automatically, precise processing can be achieved by performing the calculation and position alignment of the material height through the camera have.

1 is a structural diagram according to a preferred embodiment of the present invention,

2 is a conceptual diagram illustrating a focusing algorithm according to the present invention;

3 is a cross-sectional view showing a removable structure of the fixing jig unit according to another embodiment of the present invention;

Figure 4 is a partial perspective view showing a recovery structure of the fixing jig portion according to another embodiment of the present invention,

5 is a block diagram showing a configuration and a connection relationship according to a preferred embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the laser engraver having an automatic supply and focusing function of the present invention.

1 is a structural diagram according to a preferred embodiment of the present invention, the present invention is basically the laser module unit 110, the first transfer unit 120, the second transfer unit 130, the fixed jig unit 140 and And a main configuration of the conveyor unit 150, the camera unit 160, and the control unit 180.

The laser module unit 110 is basically a laser oscillator for generating a laser and an optical system configured to emit a laser generated by the laser oscillator to the material side is a configuration of a conventional laser module for emitting a laser beam for processing.

The first transfer part 120 is installed on the stationary body 101 located above the workpiece and moves the laser module 110 in the X-axis and Y-axis directions according to an input control signal. It is provided with a bar (Bar) formed in the X-axis and Y-axis direction and the two motor module is formed to move along the bar, such as the structure of the galvano scan head. Since the configuration of the laser module unit 110 and the first transfer unit 120 is a known configuration used in the existing laser processing apparatus, a detailed description thereof will be omitted in order to prevent the object of the invention from being blurred.

In the present invention, the laser module unit 110 is configured to output a laser with a relatively weak output of a level that does not cause damage to the material in addition to the processing laser for processing the material.

To this end, the laser module unit 110 is provided with a switching unit 111 to use the same oscillator and optical system to control the output of the laser to selectively output the processing laser and the display laser, or the level of the laser pointer weak output By integrating a separate laser output means of the control unit through the switching unit 111 can be controlled to be made.

The second transfer unit 130 is configured to adjust the focusing position by moving the laser module unit 110 in the Z-axis direction according to a control signal. The height of the laser module unit 110 is adjusted through an electric step motor and a gear, for example, a rack and a pinion gear.

In the present invention, unlike the simple welding or cutting, as the various engraving processing including engraving is made, it is important to adjust the focusing position of the laser corresponding to the processing depth. To this end, the Z-axis position control of the laser module unit 110 through the second transfer unit 130 capable of precise control.

The fixing jig unit 140 is literally a jig for fixing the workpiece. It is composed of various shapes according to the shape of the workpiece, and is temporarily fixed to prevent shaking during laser processing of the workpiece. Processed materials can be a variety of accessories, as well as a variety of stationery and souvenirs such as keys, stamps, pens, lighters. In addition, in the case of a large amount of processing, the fixing jig is made in the form of a dedicated jig that can be temporarily fixed by making it suitable for the processing material.

On the other hand, if the processing material is made in a somewhat complex form and the number of processing is small, the fixing jig portion can be made in the form of a universal jig that can be fixed in response to various forms. Although the accompanying drawings show a fixing jig unit 140 capable of fixing a processing material having a length such as a spoon or a pen, the present invention may be applied to various types of custom-made or commercially available dedicated / universal jigs, without being limited thereto. .

In the present invention, a conveyor belt 151 and a driven roller 154 and a driving roller 155 for rotating the conveyor belt 151 in one direction are provided as the conveyor system is adopted for automatic supply of a plurality of materials. One conveyor unit 150 is provided.

Specifically, the driven roller 154 and the driving roller 155 are installed at both ends of the inner side of the conveyor belt 151 to support and rotate the conveyor belt 151, and the driving motor 157 to the driving roller 155. Is connected.

The fixing jig unit 140 is placed on the conveyor belt 151 and the processing of the conveyance and the material is made, and in order to prevent sagging of the conveyor belt 151 in the middle part, a separate additional roller or plate-shaped support ( 156 is provided inside the conveyor belt.

The structure of the conveyor unit 150 is not significantly different from a conventional conveyor, but a plurality of coupling portions 152 to which the fixing jig unit 140 is detached to the conveyor belt 151 above the conveyor belt 151 are formed at regular intervals and stacked. The movement of the fixed jig unit 140 is prevented during movement and laser processing and precise processing is made.

The camera unit 160 is installed together with the laser module unit 110 and the stationary body 101 on which the first transfer unit 120 is formed, including the position of the processing material located on the lower side of the processing material through the processing laser. The spot formed in the picture is taken.

5 is a block diagram showing a configuration and a connection relationship according to a preferred embodiment of the present invention. In the present invention, the control unit 180 is basically a power corresponding to the MCU is configured to receive a control command by the control command, including the laser module unit 110 and the switching unit 111, the first transfer unit 120 and the second transfer unit The controller 130 and the camera unit 160 are controlled, and include a first operator 181 and a second operator 182.

The first operation unit 181 is configured to analyze the image photographed by the camera unit 160, and photographs the spot positions of the laser for display formed by classifying the material non-installation state, reference material installation state, and processing material installation state, respectively. And save it. In addition, the height of the target material and the focusing value of the laser module unit 110 are calculated through comparative analysis of each stored image and the newly photographed image.

2 is a conceptual diagram illustrating a focusing algorithm according to the present invention.

Referring to FIG. 2, when there is no processing material under the laser module unit 110, the display laser is substantially displayed at the point A of the screen photographed corresponding to the upper surface of the conveyor belt.

The reference material may be a material having a separate unit dimension for focusing value calculation criteria or, in some cases, a fixed jig unit 140 in which a processed material is not installed, and outputs a display laser. When shooting in the state, the display laser is displayed at the D point corresponding to the position.

After that, check the actual distance of AD and measure the distance between E point and A point, which is the laser position for display when shooting with the actual processed material, and compare the AD distance with the thickness of the reference material that is already known through actual measurement. The thickness value of the actual processed material supplied can be calculated, and the focusing value of the laser module 110 corresponding to the processing depth can be calculated based on this.

As a result, the controller 180 controls the second transfer unit 130 by reflecting the focusing value when outputting the laser for processing through the laser module unit 110 so that the laser processing is performed at an accurate depth. By controlling the first transfer unit 120 to be made a piece of the desired pattern.

Since the technology for controlling the laser module unit 110 and the first transfer unit 120 by inputting engraving or marking patterns through an internal or external PC or an input device is already commercialized, an object of the present invention is to In order to prevent blurring, a detailed description thereof will be omitted.

In addition, in the present invention, the camera unit 160 may be utilized for alignment of the workpiece before processing, in addition to the above-described focusing value calculation.

To this end, the controller 180 further includes a second operation unit 182 that analyzes the image photographed by the camera unit 160 and photographs the position of the workpiece according to the machining position to calculate a correction value for the reference position. Done.

That is, since the processing material is disposed at the correct position under the laser module unit 110, accurate processing can be performed, and the processing is fixed to the fixing jig unit 140 and the coupling unit 152 by controlling the driving motor 157. When the raw material is supplied, the supply situation is photographed through the camera unit 160. In this case, a correction value for the difference between the preset reference position and the position detected through the current shooting is calculated.

Accordingly, the controller 180 is configured to align the material in the correct position by controlling the conveyor unit 150, that is, the driving motor 157, in consideration of the correction value.

As mentioned above, in fixing the fixing jig unit 140 to which the material is fixed to the coupling unit 152 of the conveyor belt 151, the coupling unit 152 is configured in a plurality of protrusions protruding upwards. A plurality of grooves corresponding to the protrusion may be formed under the fixing jig unit 140 to limit the movement of the front, rear, left and right.

However, the thickness of the fixing jig unit 140 may be configured in various ways depending on the size of the material to be processed. What is needed is a way to achieve this.

3 is a cross-sectional view illustrating a detachable structure of a fixing jig part according to another exemplary embodiment of the present invention, wherein the coupling part 152 protrudes upward and has a first coupling protrusion 153 having an extended shape. have. The first coupling protrusion 153 may be formed in various forms, and in the accompanying drawings, the upper ends of the pair of first coupling protrusions 153 are bent inward to show an expanded shape.

Correspondingly, the fixing jig unit 140 has a second coupling protrusion 141 fastened to the first coupling protrusion 153 at a lower side thereof, and the second coupling protrusion 141 moves within a predetermined range. And it is configured in the space formed under the fixing jig portion 140 so that the fastening and separation for the first coupling protrusion 153 can be made.

At this time, the fixing jig unit 140 is protruded to the left and right outer side to separate from the first coupling protrusion 153 by moving the second coupling protrusion 141 by the operation, that is, the pressurizing portion 142 is formed In the space formed below the fixing jig unit 140, a spring 143 is provided to act to maintain the coupling state of the second coupling protrusion 141 with the first coupling protrusion 153.

That is, the worker installs the fixing jig 140 to the coupling part 152 of the conveyor belt 151 while pressing the separating part 142, and releases the pressure of the separating part 142 to release the spring ( Through the action of 143, the second coupling protrusion 141 moves and is firmly fixed while maintaining the coupling state with the first coupling protrusion 153.

After the machining operation by pressing the separation unit 142 from the coupling unit 152 by lifting up the fixing jig unit 140 in a state in which the coupling of the first coupling protrusion 153 and the second coupling protrusion 141 is released. It can be easily removed.

Figure 4 is a partial perspective view showing a recovery structure of the fixing jig portion according to another embodiment of the present invention, through the detachable structure of the fixing jig portion 140 described above, and easily remove the fixing jig portion 140 in a state where the processing is completed and The structure of the collection part which can be recovered is shown.

The recovery unit is located above the rear portion of the conveyor unit 150 from which the fixed jig unit 140 is finished, the operation unit 171 and the seating unit 172 and the slide unit 173 in detail configuration, The stack 174 is provided.

The operation unit 171 operates the separation unit 142 as the fixed jig unit 140 coupled to the conveyor belt 151 is transferred, ie, presses the first coupling protrusion 153 and the second coupling protrusion 141. In a configuration to release the coupling state of the), it is fixedly installed to be able to contact both sides of the fixed jig portion 140 to move.

At this time, the fixing jig unit 140 moves together with the conveyor belt 151 and the separating unit 142 and the operating unit 171 are provided so that the separating unit 142 protruding on both sides may be pressed against the operating unit 171. It is preferable to form inclined surfaces at the contact portions on one or both sides of the substrate.

The seating part 172 is a contact portion of the conveyor belt 151 and the fixing jig 140 as the fixing jig unit 140 moving together with the conveyor belt 151 is disassembled by the operation unit 171. As a plate-like structure configured to be seated while digging and separating, the inclined surface can be formed so that the contact portion of the conveyor belt 151 and the fixing jig portion 140 can be easily dug.

The slide portion 173 extends to the rear side of the seating portion 172 and is a rail-shaped structure for slidingly moving the fixing jig portion 140 seated separately from the conveyor belt 151 to the rear side. At the end of the slide unit 173, the movable jig unit 140 includes a stacking unit 174 on which the movable jig unit 140 is stacked, and is configured to easily collect and recover the fixed jig unit 140 where the finished material is fixed. .

Claims

In the laser engraver comprising a laser oscillator and an optical system to emit a laser beam for processing and a first transfer unit for moving the laser module in the X-Y axis direction in accordance with a control signal,

The laser module unit is configured to output a display laser in addition to the processing laser,

A second transfer unit for adjusting a focusing position by moving the laser module unit in the Z-axis direction according to a control signal;

Fixing jig unit for temporarily fixing the workpiece;

A conveyor unit having a plurality of coupling belts having a plurality of coupling parts detachable from the fixing jig at a predetermined interval, and a driven roller and a driving roller rotating the conveyor belt in one direction;

A camera unit photographing a spot formed on a workpiece through the laser for processing;

A first calculation unit for analyzing the image photographed by the camera unit and calculating a height of a target material and a focusing value of the laser module unit by analyzing a spot position of a display laser formed by classifying a material not installed, a reference material, and a processed material;

A control unit which receives power and controls the laser module unit and the first transfer unit and performs processing, and controls the second transfer unit by reflecting the focusing value; Laser engraver having an automatic supply and focusing function characterized in that it comprises a.
The method of claim 1,

A second calculation unit which analyzes the image photographed by the camera unit and calculates a correction value for the reference position by photographing the position of the workpiece according to the machining position; More,

The control unit is a laser engraver having an automatic supply and focusing function, characterized in that configured to align and transfer the target material by controlling the conveyor unit reflecting the correction value.
The method of claim 1,

The coupling portion protrudes upwards but is made of a first coupling protrusion of an extended shape,

The fixing jig unit has a second coupling protrusion which is fastened to the first coupling protrusion at the lower side, and an automatic supply and focusing, characterized in that the separation unit for moving away from the first coupling protrusion by moving the second coupling protrusion by an external operation. Laser engraver with the function.
The method of claim 4, wherein

Located on the rear side of the conveyor unit and the fixing jig coupled to the conveyor belt is transferred to the operation unit for manipulating the separation unit, the mounting jig is separated from the conveyor belt and the seating portion is extended and seated A recovery unit having a slide unit for sliding the fixed jig unit to the rear side; Laser engraver having an automatic supply and focusing function characterized in that it further comprises.