Mari belajar teknologi potong laser A.K.A Laser cutting, keinginan belajar ini timbul dari pengalaman saya ketika mengerjakan proyek yang membutuhkan banyak pekerjaan laser cutting dan CNC bending.
Namun pekerjaan yang saya berikan kepada perusahaan yang menerima jasa potong laser dan tekuk CNC sering kali mengecewakan dari sisi Kepresisian dan kehalusan potong. Setelah mempelajari dan berdiskusi dengan beberapa praktisi dan operator saya menemukan akar permasalahannya yaitu "SDM dan TAKUT "
SDM yang tidak memiliki passion yang bekerja hanya untuk mendapatkan gaji sangat cuek dengan hasil potongnya mereka tidak memiliki minat untuk belajar sehingga mereka bekerja hanya berdasarkan kebiasaan dan hafalan saja. "Pokoknya habis pencet tombol A - pencet tombol B" Tanpa mengerti esensi dari tindakan yang mereka lakukan, sehingga banyak parameter yang tidak mereka kontrol.
SDM yang takut cenderung berbohong dan tidak jujur sehingga akar permasalahan yang sebenarnya tidak pernah terungkap oleh pihak manajemen sehingga akan terjadi siklus pengulangan kesalahan yang ujung ujungnya mengecewakan costomer seperti saya.
Karena sering dikecewakan dengan produk laser cutting hasil dari perusahaan penerima jasa laser cutting, maka saya sebagai R&D diberi kewajiban oleh perusahaan tempat saya bekerja untuk mengaplikasikan plasma cutting Hypertherm Power Max 1650 + CNC PNC-10 buatan koike + software FIGDEF 8 dan KAP 80
Akhirnya saya membentuk Tim plasma cutting yang saya training dan bentuk sistem operasionalnya sampai lancar.
Ternyata usaha saya tidak sia sia dan hasil potong menggunakan plasma cutting tidak kalah dengan laser cutting, namun tetap ada beberapa pekerjaan yang tidak bisa dikerjakan oleh plasma cutting yang saya misalnya membuat lubang lebih kecil dari 20mm dan Hasil potong pada sudut tidak sebaik jika menggunakan laser cutting namun hasil ini bisa diterima oleh QC karena masih dalam batas toleransi + - 0,3 mm
Tapi OK lah, sementara belum mampu beli mein laser kita pelajari dulu saja siapa tahu suatu saat nanti bisa di terapkan.
Laser Cutting
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| Precision sheet metal piercing |
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| Rapid profiling of sheet metal |
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| Clean and precise cut edges |
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| Intricate profiling of tube |
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At Stevens Rowsell we operate a fully automated Trumpf 4kw Trulaser with two 8m tall material storage towers and an integrated sheet handling system for automated loading and unloading of sheets 3000 x 1500mm.
Benefits of using Laser cutting technology
Our technologically advanced Trumpf Laser Machines provide us with an efficient, high speed and cost effective form of profiling sheet metal which ensures that the work we produce is competitively priced, is turned round quickly and has a superior clean cut and oxide free finish. The features and benefits to our customers are thus:-
 | | High speed cutting with Nitrogen - gives clean edges, no oxide and limited discolouration and therefore a more visually aesthetic finish |
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| | Auto Height Sensing - No material marking |
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| | Positioning and dimension accuracy of 0.05mm guaranteed |
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| | Oil on Pierce - (Anti Splatter) for cleaner dross free cut |
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| | Laser Cat Eye – Allows the use of pre-punched / formed blanks
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| | Parts can be marked for identification purposes |
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| | Advanced Process Control (APC) - Guarantees process reliability in piercing and cutting by automatically determining the exact sheet position on the laser bed and thus regulating the distance between the cutting nozzle and the work piece. This helps to produce a better cutting result regardless of the sheets unevenness and also eliminates the need to manually reposition the sheet thus preventing scratches to the underside of the work piece. |
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| | Latest generation software - Automatically nests different part profiles from different jobs on the same sheet which helps us to maximise sheet utilisation & reduce wasted material as well as cutting more than one specific job at the same time. This software coupled with the laser technology we employ helps us offer highly competitive pricing and a genuine value for money metal cutting option. |
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| | Intelligent planning - the software also reports back to our business system helping keep our production scheduling accurate and our delivery dates on time. |
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| | Versatility - The laser beam is effectively a multifunctional tool which can cut through a wide variety of materials (including coated sheet), whether thick or thin. Part geometry (size & shape) can be simple or highly complex enabling the laser to cut an infinite range of shapes and forms. |
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| | We can produce one off prototypes or provide a quick turn around on production quantities. |
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| | Customised automation - We have a fully automated laser cell incorporating two 8m tall sheet metal storage towers with 50 individual storage stations and an automatic sheet changer. The system fully automates the loading and unloading operations transporting raw material sheet to the bed of the laser (by means of suction cups). An unloading rake then transports the finished work pieces and scrap skeletons from the machine to the finished parts stack whilst a new sheet is conveyed to the bed of the laser to continue the cutting cycle. The loading device enables seamless and constant handling even when heavy sheets are involved, doing away with the need for men and cranes to perform the operation. Material loading, production and parts unloading therefore all take place simultaneously, eliminating downtime, increasing capacity and reducing delivery lead times. |
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These CO2 gas lasers operate according to the "flying optics" principle, whereby the laser beam is moved over the working area whilst the work piece remains static. This allows high processing speeds and very high quality cutting to be achieved independent of material weight.
Download clip 1 of laser in action
Download clip 2 of laser in action
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| Making light work of a precise cut through steel |
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How is our laser beam produced?
A turbine prepares the laser gas (a mixture of carbon dioxide, nitrogen and helium) at a specific ratio and delivers the mixture to a discharge tube at high speed and under pressure. Inside the discharge tube there are electrodes which stimulate the mixture between 2 mirrors (called a resonator) to produce a laser beam. The output mirror allows a certain percentage of the beam to leave the resonator. The beam is then focussed onto a convex lens in the flying optic. The resultant laser beam has an output range of up to 3kw and the ability to cut through a wide variety of materials including;
 Stainless Steel – up to 15mm
Mild Steel – up to 20mm
Aluminium – up to 10mm
Brass – up to 5mm
SOURCE : www.stevensrowsell.com/ |
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