TECHNICAL FIELD

The present invention relates to a laser cutting machine having a centering unit for providing precise cutting of quadrangular profiles.

PRIOR ART

Laser cutting is a technology where laser rays are used for cutting metal and similar materials. In this technology, high powered laser rays are guided to the work piece in a computer controlled manner, and thereby, the region, which is subjected to the rays, is melted, burnt or evaporated.

In the known state of the art, in pipe cutting machines, there is a predetermined distance between the second mirror and the cutting head. The mirror which moves rotationally in the cutting area compresses the profile part, which will be cut, according to the diameter and thickness thereof. This process provides the profile to be driven forwardly in an easier manner and prevents sliding of the profile during rotation. Driving of the profile to the area where the cutting head is provided can be provided by means of methods like drawing.

In pipe cutting machines, distortion may occur on the surface of the quadrangular profile part which will be cut by means of laser, inner bending may occur on the edge surfaces and similar surface problems may occur. Even though not frequently occurs in aluminum profiles, surface wastes frequently occur particularly on black sheets and on profiles with stainless material. Particularly in small-sized quadrangular profiles and in long-sized profiles, distortions occur. This leads to problems in regular cutting and in centering of the quadrangular profile arriving at the cutting area. Moreover, in sensitive parts which are desired to be cut, tolerance is exceeded. This leads to increase of discard proportions and production costs.

As a result, because of all of the abovementioned problems, an improvement is required in the related technical field. BRIEF DESCRIPTION OF THE INVENTION

The present invention relates to a laser cutting machine, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field.

An object of the present invention is to provide determination of distortion and inner bending faults existing on the surface thereof and accordingly to provide realization of the center adjustment of the cutting head during cutting of quadrangular profiles by means of laser.

Another object of the present invention is to decrease discard proportion formed during cutting and to increase production efficiency by realizing centering in a correct manner in quadrangular profiles with distortion and inner bending faults on the surface thereof.

In order to realize the abovementioned objects and the objects which are to be deducted from the detailed description below, the present invention relates to a laser cutting machine for providing cutting of a quadrangular profile and having a mirror which moves rotationally and which tightens and holds said quadrangular profile, at least one support arm which supports lifting of the quadrangular profile held by said mirror, a second mirror which provides fixation of the quadrangular profile, advanced by the mirror, at the section where cutting will be realized, and at least one cutting head realizing the cutting process. Accordingly, in order to provide center adjustment of the quadrangular profile, the subject matter laser cutting machine comprises a centering unit having at least one sensor, at least one processor where the center measure, detected by said sensor, is transferred, and at least one control unit which adjusts the position of said cutting head according to the information transferred from said processor. Thus, during cutting of quadrangular profiles by means of laser, the distortion and the inner bending faults existing on the surface are determined and accordingly, center adjustment of the cutting head is realized.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a representative perspective view of the subject matter laser cutting machine.

Figure 2 is a representative perspective view of the part where the cutting head exists in the subject matter laser cutting machine.

Figure 3 is a representative schematic view of centering unit of the quadrangular profile in the subject matter laser cutting machine. DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the subject matter laser cutting machine (1 ) is explained with references to examples without forming any restrictive effect only in order to make the subject more understandable.

In Figure 1 , a representative perspective view of the subject matter laser cutting machine (1 ) is given. The present invention relates to a laser cutting machine (1 ) having a centering unit (50) in order to provide precise cutting of quadrangular profiles (2). In said laser cutting machine (1 ), there is a mirror (10) which compresses and holds the quadrangular profile (2), which is to be cut, from pluralities of points according to the edge dimensions. At least one support arm (20) supports lifting of the quadrangular profile (2) held by said mirror (10). The quadrangular profile (2) supported by said support arm (20) is advanced forwardly by the mirror (10) and is transferred to the part where cutting will be realized. By means of a second mirror (30) positioned in the cutting area, the quadrangular profile (2), which is to be cut, is compressed and fixed. At least one centering unit (50) is provided for providing correct centering and regular cutting of the quadrangular profile (2) which is to be cut by means of at least one cutting head (40).

In Figure 2, a representative perspective view of the part where the cutting head (40) exists in the subject matter laser cutting machine (1 ) is given. In the laser cutting machine (1 ), the mirror (10), which is moving rotationally, compresses and holds the quadrangular profile (2) through pluralities of points according to the diameter and thickness of the quadrangular profile (2). This process provides easy advancing of the quadrangular profile (2) and is realized for preventing sliding during rotation. After lifting of the support arms (20) according to the dimensions of the quadrangular profile (2), the quadrangular profile (2), which is to be cut, passes through the second mirror (30) and is driven towards the area where the laser cutting head (40) exists. In this part, at least one sensor (51 ) is provided for determining the center position of the quadrangular profile (2). By means of said sensor (51 ), the location of the center of the quadrangular profile (2), whose position changes because of the distortions which occur due to bending and similar reasons, is determined.

In Figure 3, a representative schematic view of centering unit (50) in the subject matter laser cutting machine (1 ) is given. In said centering unit (50), there is a processor (52) to which the center position of the quadrangular profile (2) detected by the sensor (51 ) is transferred. Said processor (52) compares the center information of the quadrangular profile (2), transferred from the sensor (51 ), with the predetermined value and calculates the distance with respect to the center. Afterwards, command is transferred to a control unit (53) for providing adjustment of the position of the cutting head (40) by the processor (52). Said control unit (53) adjusts the position of the cutting head (40) according to the information received from the processor (52). Thanks to this, the most precise cuttings are realized even in quadrangular profiles (2) which are not regularly linear. Thanks to the instantaneous measurements, the same precision is provided during cutting of the quadrangular profile (2).

Thus, by means of realizing centering in a correct manner in quadrangular profiles (2) with distortion and inner bending faults on the surface thereof; the discard proportion, which occurs during cutting, decreases and the production efficiency increases.

The protection scope of the present invention is set forth in the annexed claims and cannot be restricted to the illustrative disclosures given above, under the detailed description. It is because a person skilled in the relevant art can obviously produce similar embodiments under the light of the foregoing disclosures, without departing from the main principles of the present invention.

REFERENCE NUMBERS

1 Laser cutting machine

2 Quadrangular profile

10 Mirror

20 Support arms 30 Second mirror 40 Cutting head 50 Centering unit 51 Sensor

52 Processor

53 Control unit