Nima Are The sabablari uchun the muammo of lazer kesish? (Part 1)

lazer kesma

ning masofasi yuzasi ning yuzasi material ( qalinligi ga bog'liq plata), yuqori bosimli gaz chiqadigan at the the nozli, va the lazer nur ishlatiladi uchun ishlatiladi uchun kesish operatsiyasini yakunlash uchun. Uning ishlamasligi sabablari uning muvaffaqiyatsizligi quyidagicha quyidagicha 3a

1. The impact of kesish tezligi on kesish sifati

For a berilgan lazer kuchi zichligi va material, the kesish tezligi mos to an empirik formula, as long is dan yuqori bo'ladi the national value, the kesish tezligi the material ga proportsional to to proportsional lazer quvvati zichligi, bo'lgan 2c ortib borayotgan kuchlanish zichligi mumkin yaxshilanishi mumkin kesish tezligi. Bu erda ko'rsatilgan kuchlanish zichligi bu bilan bog'liq emas bilan bog'liq bo'lgan lazer chiqishi kuchi balki ga ham to icha sifatli sifatli rejim. In qo'shimcha, ning xususiyatlari the focusing system, bo'lib bo'ladi o'lchami the spot after focusing, also have a great influence on laser cutting.

kesish tezligi teskari proportsional to the zichligi (aniq gidravlika) va qalinligi ning material bo'lishi kesilishi. While other parametrlari remain constant, the factors that improve the cutting speed are:

% e2% 91� Inkrease power ( a maʼlum oraligʻida, masalan 500 ~ {2 000W)% 3b

% e2% 91� Yaxshila light mode (yuqori rejimdan past rejimgacha TEM00):

% e2% 91� Kichiklashtirish oʻlchamini kamaytirish diqqatga sazovor nuqta (masalan, foydalanish qisqa fokus uzunligi linza fokuslash, yordamida an asforik fokuslash oynasi)% 3a

Kesish materiallari kam boshlang'ich bug'lanish energiya (plastmassa kabi 2c plexiglass, etc.) % 3a Kesilgan past zichlikdagi materiallar (masalan, oq qaragʻay, va boshqalar)) % 3b Kesilgan nozik material.

Ayniqsa metall materiallar, in the case that other process o'zgarishlar doimiy, the lazer kesish tezligi mumkin a nisbiy sozlash oralig'i va hali maintain a qoniqarli kesish sifati, qaysi bo'lsa bo'ladi kesma nozik metall bo'lganda qalin qismdan biroz kengroq bo'ladi. Ba'zan, the sekin kesish tezligi bo'ladi shuningdek ablation yuzasi of the issiq eritma material to bo'lishi uchun bo'lishi 2c qilish bo'limi juda qo'pol.

2. The ta'sir of sotish nuqta pozitsiya sozlash on the kesish sifati

Chunki lazer quvvati zichligi a katta ta'sir on the kesish tezligi, tanlash the lens focal length is an important issue, the spot size after the laser nur is focused is proportional to lenta fokus uzunligi, va the spot hajmi keyin chiroq yo'naltirilgan bo'lgan bo'ladi tomonidan qisqa fokus uzunligi linza juda kichik, the power zichligi tashqarida eng yaxshi nuqta juda yuqori, bo'ladi bu bo'ladi bo'ladi bo'ladijuda foydali uchun material kesish: lekin uning noqulayligi shundaki chuqurlik juda qisqa 2c the sozlash margin kichik, va sifat juda past. Umuman ko'proq mos yuqori tezlik uchun mos bo'ladi kesib to'liq material. Chunki uzunligi fokal uzunligi orqali pin a keng fokal chuqurligi 2c bo'lgani uzoq bo'lsa u etarli quvvat zichligi, u ko'proq mos bo'ladi kesish qalin ish qismlari uchun mos bo'ladi.

fokus ichida eng yaxshi pozitsiya, the slit the eng kichik, the efficiency is the eng yuqori, va the the best cutting speed can obtain the best cutting results. the best cutting results. In ko'pchilik dasturlarda, the chiroq yig'ish nuqtasi moslashtirilgan to faqat ostida nozul. The distance between the nozle and the workpiece surface is umuman taxminan 1,5mm.

3. The influence of auxiliary gas pressure on cutting quality

In general, material cutting requires the use of auxiliary gases, and the problem mainly involves the type and pressure of auxiliary gases. Usually, the auxiliary gas is emitted coaxial with the laser beam, protecting the lens from contamination and blowing away the bottom slag of the cutting area. For non-metallic materials and partial metallic materials, compressed air or sexual gas is used to remove melting and evaporating materials while inhibiting excessive combustion in the cutting zone. For most metal laser cutting, active gas (mainly 02) is used to form an oxidative exothermic reaction with hot metal, and this part of the additional heat can increase the cutting speed by 1/3~ 1/2. Under the premise of maintaining the auxiliary gas, the gas pressure is a very important factor. When cutting thin materials at high speed, high gas pressure is required to prevent the back of the incision from sticking to the slag. When the material thickness increases or the cutting speed is slow, the gas pressure is appropriately reduced, in order to prevent the plastic cutting edge, it is also better to cut with lower gas pressure. Laser cutting practice shows that when the auxiliary gas is 02, its purity has a significant impact on the cutting quality. A 2 percent reduction in purity reduces the cutting speed by 50 percent and results in a significant deterioration in the quality of the cut.