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雷射/火焰/水刀切割

SprutCAM具備乙炔,電漿,火燄,水刀和雷射切割的模組。加工工法提供了控制工件被切割下料的順序,並且自動建立十字樑或架橋以減少熱變形

1. 板狀材料的加工類型

SprutCAM 可以針對雷射,火焰及水刀切割來產生 2, 3, 4 和 5 軸的程式(或CLData). 並且可以控制下料的順序,也就是可以避免將外部輪廓先切割而留下未切割的部位. 在此工程內第一先切割內部輪廓,外部輪廓最後再切割或下料 . 

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乙炔氧氣切割

氧氣切割是以純氧流動並且讓其燃燒,以同樣的流量帶走隨後產生的燃燒產物。如此則可以在金屬材料上產生燒熔的能力。 乙炔,丙烷或天然氣為其主要燃料。

電漿切割

電漿火焰切割方法是基於直接應用恆定電流的空氣等離子弧的使用(陰極是電極,所述金屬被切割為ANOD)。當電漿切割機移動並切割金屬時,此過程包括局部熔化和吹出熔融金屬. .

水刀切割

用於水刀切割的刀具是一個專門形成的液體流動,從一個特殊的噴嘴出來的直徑為0.08 - 0.5毫米的超音速速度(千米/秒及以上),它提供在400MPa的工作壓力和更多的工件。作為噴嘴部分和材料之間的距離是幾個mm,流程壓力超過材料的電阻限制,此即為其切削原理.

SprutCAM 支援此兩種水刀切割:

  • 純水水刀
  • 加砂水刀

加砂水刀可增加切削的能力,適於較硬及較厚的工件材料.

雷射切割

Laser cutting implies no mechanical contact with the treated material. The focused laser radiation allows cutting and graving of almost any material, regardless of its thermophysical properties. The precision of the laser head is around 0.08 mm. which permits to have a high precision of the reciprocal position of the workpiece elements. Laser cutting can be applied to the easily deformed and not rigid workpieces. The laser beam has a diameter around 0.2 mm, which allows creation of holes with diameter 1 mm.

The high power of the laser radiation guarantees a high efficiency of the laser cutting. Laser cutting enables cutting almost any type of sheet material even with a complex contour.

2. 加工技術選項

From the point of view of the writing of the NC programs for the cutting methods mentioned, the choice of the exact cutting method does not have a crucial importance. For instance, the command for the turning off of the plasma (M53), when working with the plasma equipment, and the command for turning on of the alternator (M73), when working with the laser cutting is pretty much the same from the point of view  of how it is realized in the CAM system. So the NC program writing for laser, oxygen, plasma and waterjet cutting can be done in the same module of the CAM system provided there are the postprocessors in question. 

3. CAD繪圖系統的需求

CAD systems are used to form the profile of the parts being cut out and form a cutting sheet on their basis. The requirements to such systems are set depending the caracter of the parts being cut out, their number, profile complexity. For instance, if a plasma cutting machine is used in making of a large number of parts of various complexity, one of the top requirements is to have an optimal lay out of the parts on the sheet which provides maximum coefficient of the material used.

On the other hand, when the sheet doesn’t need to be filled in completely with the parts to cut out, the emphasis is on the geometry editor and sophisticated imports methods from the modeling systems (CorelDraw, RhinoCeros).

 

4. 在SprutCAM 建立NC程式

Contour cutting sequence optimization according to the lengths of the passes, taking into consideration the inner contours. 

The contour cutting sequence is determined automatically, taking into consideration the inner contours. This has to be done in order to avoid the untimely cutting out of a part with uncut parts inside. Besides that, the system provides the optimization of the machining sequence taking into account the length of the passes between parts.

Automatic detection of the optimal approach points to the workpiece contour with a simultaneous control of the approaching and withdrawal of the cut of the neighbouring parts

The system has an automatic creation of the positions for the tool penetration, depending on the approach chosen, avoiding a cutting of the neighbouring parts.

轉角路徑處理的選項

In order to avoid the bad angle cutting of the part, the system has several methods of forming of tool path in the angles. The passing of the angles can be set automatically or manually, depending on the angle.

支撐架(架橋)功能

In order for the cut out pieces not to fall out from the sheet, you can leave several crosspieces on their contours. After the cutting, the cross pieces are cut and the parts are taken out from the sheet. 

SprutCAM擁有下列設定支撐架(架橋)的模式選項:

  • 不使用支撐架;
  • a definite number of crosspieces is set, hence we get an even number of crosspieces for all the curves;
  • number of crosspieces for each curve is variable and depends on its length;
  • number of crosspieces for each curve is variable and depends on its surface area.

避免加工路徑越過已加工的區域範圍

Often, the machined piece will bend because of the thermo treatment and it can break when the cutter head is moved above it. In order to avoid such situations, the passes between cutting in points can be done above the unmachined zones of the sheet. When the function is turned off, the passes will be made following the shortest distance between the points. When the function is turned  on, the passes are made in such a way, that the cutter head avoided passing above the already cut out contours.

3D 實體模擬 

The CLData is checked in the machining simulation mode. The cutting simulation assures visual control of the quality of the CLData.

5. 機器及設備製造廠

列出部份加工設備的製造廠商: Flow International Corporation; Water Jet Sweden AB; Bystronic; Trumpf; Sato Schneidsysteme; Aliko; Trenntec; ESAB Welding & Cutting Productions; Digital Control 等...

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