KR200267441Y1 - Laser cutting material surface condition detection device - Google Patents

Abstract

The present invention detects the surface of the cutting material during cutting and burns the laser cutter by rapidly moving the laser cutter away from the product and spraying coolant while cooling the burning slag when the burning phenomenon occurs or the cutter may be damaged by foreign materials. The present invention relates to a laser cutting material surface detection device capable of protecting

In the laser cutting machine configured to cut the cutting material 160 by scanning the laser beam through the laser head 102 side of the tip, the support body 10 is mounted to the laser head 102 via a tightening nut 14. And a pipe-shaped first support 30 provided perpendicular to the extension body 20 extending from the support body 10, and a connector 40 mounted on the first support 30. The upper end portion is inserted into the second support 50 and the support 30, 50, and can be moved up and down, equipped with a protruding plate 62, the movement to the lower side is limited, the lower portion by the elastic member 70 A disk-shaped contact plate 80 formed with a sliding rod 60 to receive elastic resilience to the side, and a through hole 82 fixed to a lower end of the sliding rod 60 to pass through the laser beam. And, in contact with the upper end of the sliding rod 60 is electrically connected to each other Is characterized by consisting of the contacts (91, 92).

Description

Laser cutting material surface condition detection device

The present invention relates to a device for protecting a laser cutting machine by detecting a burning phenomenon generated when cutting a product by the laser cutting machine, and more specifically, by detecting the surface of the cutting material during cutting, burning phenomenon occurs or The present invention relates to a laser cutting material surface sensing device capable of protecting the laser cutting machine by rapidly moving the laser cutting machine away from the product when the cutter is damaged, and simultaneously cooling the burning slag by spraying cooling water.

In general, the laser cutting machine 100 has a high-frequency discharge 6 GHz laser oscillator, cooling water, air, cutting gas (He, N ₂ ) supply unit, and includes steel, stainless steel, aluminum, and the like. It is a device widely used in the industry because it is possible to straighten, curve, rotate, and cut the model. In case of steel, the cutting thickness is 4.5 ~ 30mm, and the strength, oxygen, cutting gas, and air of laser are different depending on the thickness and material. The optimum conditions, such as cooling water, are selected and cutting is performed at a speed of about 500-1600 mm / min.

As shown in FIG. 1, the laser cutting machine 100 has the path 140 of the laser beam 110 properly adjusted by the reflector 120, and then passes through the lens 130 to focus 140 at an appropriate position. ), Thereby cutting the cutting material 160. In addition, the ring sensor 150 is provided to maintain the distance between the laser head 102 and the cutting material 160, which are the front end of the laser cutter 100, in an appropriate state, and the ring sensor 150 has a focus 140. It consists of an approximately ring shape to form a suitable radius around the center and will be integrated with the laser cutting machine 100.

That is, when the laser cutter 100 is lowered for cutting, the ring sensor 150, which behaves integrally with the laser cutter 100, is also lowered to cut the material 160 first before the laser head 102 at the tip of the laser cutter 100. Touches the surface of the laser cutting machine 100 and stops descending, and this state is maintained at a distance of 2 to 3 mm formed between the cutting material 160 and the laser head 102, and the laser cutting is performed. It is a state that can be made stable. Therefore, while the ring sensor 150 is in contact with the surface of the cutting material 160, the distance between the cutting material 160 and the laser head 102 is kept constant, the cutting is made in this state.

However, in the laser cutting operation by the conventional laser cutting machine 100 and the ring sensor 150, there is no means for protecting the laser head 102 and the ring sensor 150 when burning occurs due to a bad cutting. If the conditions such as the cutting speed, the strength of the laser, the pressure of the gas, or the like are not appropriate or the cutting material 160 is partially defective, the cutting material is not performed during cutting and the cutting material 160 is shown in FIG. 2. The burning phenomenon boils in the molten slag 170 state over the surface of the bar), thereby causing the laser head 102 and the ring sensor 150 to melt due to the high temperature of the slag 170. In addition, such breakage is accompanied by frequent replacement of the laser cutting machine, resulting in a life-threatening problem in terms of productivity as well as a decrease in lifespan.

The present invention is to solve such a conventional problem, when cutting the product with a laser cutting machine to detect the burning phenomenon that occurs when the cutting conditions such as cutting speed, the strength of the laser, the pressure of the gas is not appropriate laser cutting machine and It is an object of the present invention to provide a laser cutting material surface state detection device to prevent damage by protecting the ring sensor away from the slag by burning.

1 is a schematic configuration diagram showing a general laser cutting machine and a ring sensor

2 is a diagram showing problems caused when cutting a conventional laser

3a and 3b is an external perspective view and a front view showing a laser cutting material surface state detection apparatus according to the present invention

4 is a front schematic view showing a state in which the device of the present invention is mounted on a laser cutting machine;

Figure 5 is a schematic diagram showing the operating state of the laser cutting machine equipped with the device of the present invention.

Explanation of symbols on the main parts of the drawings

10 ... support body 14 ... tightening bolt

20 ... extension body 30 ... first support

40 ... end connections 50 ... second support

60 ... slide bar 62 ... protrusion

70 ... elastic member 80 ... contact plate

91,92 ... Contacts 94 ... Chilled water spray pipe

The present invention as a technical configuration for achieving the above object, in the laser cutting machine to cut the cutting material by scanning the laser beam through the laser head side of the tip, the support body which is mounted to the laser head via a tightening nut And a pipe-shaped first support provided perpendicularly to the extension body extending from the support body, a second support mounted to the first support via a connector, and an upper end inserted into the support to be movable. And a sliding bar provided with a protruding plate to restrict movement to the lower side, a sliding bar provided with elastic resilience to the lower side by an elastic member, and a through hole which is fixed to the lower end of the sliding bar and through which a laser beam passes. A disk-shaped contact plate and an upper end of the sliding rod are electrically connected to each other. As constituted by any contact, and the contact plate is raised by the slag, the slag occurs by the burning of the laser cut material by connecting the contact point, it characterized in that the rapid rise to the laser cutting surface condition detecting apparatus to maryeonham.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3A and 3B are an external perspective view and a front view of a laser cutting material surface state detecting device according to the present invention, and the hollow cylindrical cylindrical shape is fitted to the outer surface portion of the laser head 102 forming the tip of the laser cutting machine 100. It has a support body (10).

The support body 10 forms a flange-like extension body 20 in the outward direction, the lower surface of the extension body 20 is provided with a pipe-shaped first support 30 is integrally provided, It is preferable that a plurality of supports 30 are mounted to be spaced apart by a predetermined interval with respect to the circumferential direction of the extension body 20, it can be seen that in the embodiment of the present invention is installed by installing a plurality.

The first support (30) is integrally fixed to the lower surface of the extension body 20 is formed in a pipe shape vertically up and down, the thread 32 is formed on the outer surface of the predetermined length of the lower side, the inner central portion in the center The disk-shaped guide plate 34 having the through hole 35 formed in the vertical direction is fixed, and the nut-shaped connector 40 having the female thread 42 formed on the inner surface of the thread 32 of the first support 30. The second support 50 is fastened through). The second support 50 has a pipe shape while the upper end is opened and the lower end is closed to form a through hole 52 in the vertical direction in the center, and the outer surface can be fitted into the lower portion of the connector 40. Threads 54 are formed so as to be effective.

In the inner space formed by the first support 30 and the second support 50, the upper end portion of the sliding rod 60 which is slidable in the vertical direction through the through holes 35 and 52 is located, An elastic member 70 made of a coil spring is fitted to an upper end side of the sliding rod 60, and the elastic member 70 has a stone formed at an upper end thereof by a guide plate 34 and a lower end thereof by a sliding rod 60. By being supported by the publication 62, an elastic repulsive force is applied to the sliding rod 60 to the lower side so that the protrusion plate 62 of the sliding rod 60 can be held in contact with the closed lower end side of the second support 50. Make sure

The upper surface of the contact plate 80 is integrally fixed to the lower end of the sliding bar 70, the contact plate 80 forms a through hole 82 through which the laser beam can pass through the center, In addition, the plurality of through holes 84 formed in the vertical direction are formed to allow the cooling water to pass through the through holes 84.

In addition, the support body 10 is equipped with contacts 91 and 92 which are electrically connected to each other by contact with the upper end when the sliding rod 70 is raised, such a contact 91 and 92. Is connected to a control unit for driving the laser cutting machine 100 so that the laser cutting machine 100 can be moved by a predetermined circuit, and also coolant can be injected, and as another example, any one of the sliding rod 70 Electrically connected by the contact is involved in the shangdong of the laser cutting machine and the electrical contact by the other may be able to participate in the cooling water injection.

In addition, the support body 10 is provided with a coolant spray pipe 94 for spraying a plurality of coolant, the coolant spray pipe 94 is an on-off valve driven by the state of the contact (91, 92) (Not shown).

In addition, at least one bolt hole 12 is formed radially in the support body 10, and the tightening bolt 14 fastened through the bolt hole 12 has the support body 10 as the laser cutter 100. It can be mounted to the laser head 102 of the.

The device of the present invention having such a configuration is mounted on the laser head 102 of the laser cutting machine 100 as shown in FIG. 4, which properly supports the support body 10 toward the outer surface side of the laser head 102. After fitting so that the tightening bolt 14 is tightened, the support body 10 is firmly fixed to the laser head 102.

Of course, in such a state, the laser cutting machine 100 descends and the ring sensor 150 behaving integrally therewith also descends, and then the ring sensor 150 is maintained in contact with the cutting material 160 so that the laser cutting is performed. In this case, the contact plate 80 is positioned to have a slight distance from the upper surface of the cutting material 160 in a state of receiving the elastic repulsion force by the elastic member (70).

When cutting is performed in this state and a burning phenomenon occurs, slag is generated by the burning, and the slag pushes up the contact plate 80 and, accordingly, a sliding bar integrally formed with the contact plate 80 ( 60 rises to connect the contacts 91 and 92 with their upper ends contacting the contacts 91 and 92.

Thereby, the electrical connection of the contacts 91 and 92 is made, which activates a preconfigured electrical circuit to rapidly raise the laser cutter 100 so that the slag deteriorates and breaks the laser head 102. At the same time, coolant is injected through the coolant spray pipe 94 to cool the slag, the tip of the laser cutting machine, the ring sensor, and the like.

In other words, the laser cutting machine is protected by preventing the damage of the laser cutting machine and the ring sensor due to the burning phenomenon generated during the automatic laser cutting, and the cutting surface of the cutting material is prevented from being damaged.

As described above, according to the apparatus for detecting the surface state of the laser cutting material according to the present invention, the contact plate mounted on the tip of the laser cutting machine to maintain a minute gap with the cutting material is raised by the slag when the slag is generated by burning, and thus the electrical contact is made. It is possible to prevent the damage of the laser cutting machine and the ring sensor by the rapid rise of the laser cutting machine and the cooling water spraying by connecting the laser cutting machine, and to protect the cutting machine of the cutting material.

Claims (2)

In the laser cutting machine to cut the cutting material 160 by scanning the laser beam through the laser head 102 side of the tip, A support body 10 mounted to the laser head 102 via a fastening nut 14, A first support 30 having a pipe shape perpendicular to the extension body 20 extending from the support body 10; A second support 50 mounted to the first support 30 via a connector 40; The upper end portion is inserted into the support 30 and 50, the movable portion is movable, equipped with a protruding plate 62 is restricted to move to the lower side, the sliding to receive the elastic repulsion force to the lower side by the elastic member 70 With rod 60, A disk-shaped contact plate 80 fixed to the lower end of the sliding rod 60 and having a through hole 82 which is a space through which the laser beam passes, By contacting the upper end of the sliding rod 60 is made of contacts 91 and 92 electrically connected to each other, Laser slag surface state detection device characterized in that when the slag generated by burning the contact plate (80) is raised by the slag to connect the contacts (91) (92) to rapidly raise the laser cutting machine (100). The contact plate (80) is formed with a plurality of through holes (84), and the extension body (20) is provided with a plurality of coolant spray pipes (94) to connect the contacts (91, 92). Laser cutting material surface detection device characterized in that the cooling water is sprayed.