Elektron axborot sanoatining rivojlanishi bilan terminal elektron mahsulotlarni takomillashtirish uchun yuqori va yuqori talablar mavjud PCB sanoat. Burg’ulash tenglikni ishlab chiqarishda muhim qadam bo’lib, u minimal teshik diametri 0.08 mm, maksimal teshik oralig’i 0.1 mm yoki undan yuqori darajaga qadar ishlab chiqilgan. Teshiklarni o’tkazishdan tashqari, qismlar teshiklari, oluklar, maxsus shakldagi teshiklar, plastinka shakli va boshqalarni tekshirish kerak. PCB plitasining burg’ulash sifatini qanday samarali va aniq aniqlash mahsulot sifatini ta’minlash uchun muhim bo’g’in bo’ldi. PCB teshiklarini tekshirish mashinasi shunchaki burg’ulash sifatini tekshirishda ishlatiladigan avtomatik optik tekshiruv uskunasi. Ushbu maqolaning maqsadi burg’ulash jarayonida teshik sinov mashinasining funktsiyasini tahlil qilish va PCB ishlab chiqaruvchilari uchun mos yozuvlar tajribasini taqdim etishdir.

PCB burg’ulash jarayonida quyidagi mumkin bo’lgan sifat muammolarini nazorat qilish kerak: porozlik, oqish, joy almashish, noto’g’ri burg’ulash, penetratsiya qilmaslik, teshik yo’qolishi, chiqindilar, old, tiqin teshigi. At present, the control methods of various manufacturers are mainly to standardize the drilling process before drilling and strengthen the inspection means after drilling. In actual production, because the pre-drilling method can only reduce the probability of error, can not completely eliminate, we must rely on post-drilling inspection to ensure product quality.

In the post-drilling inspection, many domestic manufacturers are still using the plug gauge combined with artificial visual film (film) set inspection method: through the plug gauge focus on checking the hole, hole small, through the film focus on porous, leaky hole, shift, not through, not through, other hole damage, front, hole plug through artificial visual to complete. Kino tekshiruvidan foydalanishda har bir mahsulotni burg’ulashda qizil plyonka namunasini burg’ulash, pin va mahsulot plastinkasi orqali tekshirish, yorug’lik qutisi ostida qo’lda vizual tekshirish. In theory, this method can detect all kinds of defects, but in practice, the effect is greatly discounted.

The main problems are as follows:

Birinchidan, kichik diafragmani tekshirish talablari kafolatlanmaydi: ishlab chiqarish amaliyoti shuni ko’rsatadiki, minimal diafragma ≥0.5 mm bo’lgan PCB uchun qo’lda ma’lum bir ishlab chiqarish samaradorligini ta’minlash sharti bilan yuqori tekshirish natijalariga erishish mumkin. This is determined by the minimum discernable visual Angle of the human eye, the working distance, and the attention span. Diafragma o’lchamining pasayishi bilan mahsulot plitasi 0.5 mm dan past bo’lsa, inson ko’zining tekshirish qobiliyati tezda pasayadi, mahsulot plastinkasi ≤ 0.25 mm uchun qo’lda hatto namuna olish sifatini ta’minlash qiyin.

Ikkinchidan, qo’lda tekshirish samaradorligi cheklangan: qo’lda tekshirishning samaradorligi to’g’ridan-to’g’ri teshiklar soni va minimal diafragma bilan bog’liq. The actual production experience shows that the efficiency will be significantly reduced when the hole is more than 10000 and the smallest hole is less than 0.5mm. Manual inspection is only suitable for sampling. Yuqori zichlikdagi plastinka uchun qo’lda burg’ulash sifatini kafolatlash mumkin emas.

Uchinchidan, sifatning barqarorligini kafolatlash mumkin emas: odamlarga tajriba, kayfiyat, charchoq, mas’uliyat va boshqa omillar ta’sir qiladi, sifat barqarorligini ta’minlash qiyin. Some manufacturers can not use multiple artificial, repeated inspection method, but still can not ensure the stability of quality.

In order to solve the above problems, many LARGE PCB factories have adopted hole inspection AOI equipment to replace manual labor in a large range. Ayniqsa, Yaponiya va Tayvan tomonidan moliyalashtiriladigan korxonalar uchun ko’p yillik amaliyot ushbu yangi usulning samaradorligini isbotladi, bu ko’plab mahalliy PCB ishlab chiqaruvchilarining e’tiboriga va ma’lumotnomasiga arziydi.

AOI teshiklarini tekshirish uskunasi avtomatik optik tekshiruv uskunasiga tegishli. Burg’ulashning turli nuqsonlari tasvir shakliga ko’ra, uni quyidagilarga bo’lish mumkin: gözenekli, kamroq teshik, katta teshik, kichik teshik, qoldiq, teshik og’ishi va teshik shakli. U ikki turga bo’linadi: biri teshikni tekshirish mashinasi, ikkinchisi teshik o’lchash va tekshirish mashinasi (teshik-AOI). Amalda, shuningdek, rentgen tekshiruvi mashinasi mavjud bo’lib, u asosan ko’milgan ko’r teshiklarni va ko’p qatlamli taxtalarni tahlil qilish uchun ishlatiladi, bu qo’lda plyonkali ko’ylagi tekshirish maqsadiga mos kelmaydi va tahlil doirasiga kirmaydi. bu qog’oz.

PCB ishlab chiqaruvchilarining uskunalarini moslashtirish tajribasiga ko’ra, teshiklarni, bir nechta teshiklarni, katta teshiklarni, kichik teshiklarni va qoldiqlarni tekshirishga e’tibor qaratib, birinchi plastinka va pastki plastinkani to’liq tekshirish uchun bir nechta teshiklarni tekshirish mashinasidan foydalanish tavsiya etiladi; Teshik holatini o’lchash va tekshirish mashinasi teshikning og’ishiga e’tibor qaratib, nuqta tekshiruvi uchun ishlatiladi. The characteristics of the two devices are as follows:

Hole checking machine: the advantages are low price, fast inspection efficiency, check a 600mm×600mm PCB average of 6~7 seconds, can realize the porous, less hole, hole, small hole, residual inspection. Kamchilik shundaki, teshik holatini tekshirish qobiliyati yuqori emas va faqat jiddiy nuqsonlarni aniqlash mumkin. Ishlab chiqaruvchining haqiqiy ishlab chiqarish tajribasiga ko’ra, odatda 15 ta RIGS 1 teshikni tekshirish mashinasi bilan jihozlangan.

Teshik holatini o’lchash va tekshirish mashinasi: afzalligi shundaki, barcha elementlarni tekshirish mumkin. Kamchilik shundaki, narx yuqori (teshikni tekshirish mashinasining taxminan 3 ~ 4 barobari), tekshirish samaradorligi past, 1 dona tekshirish uchun bir necha daqiqa yoki undan ham ko’proq vaqt ketadi. It is generally recommended to configure one machine for product sampling inspection to supplement the deficiency of hole checking machine for hole position inspection.

Inspection principle of hole inspection AOI equipment: PCB drilling image is collected by optical system, and compared with the design document (drill tape file or Gerber file). If the two are consistent, it indicates that the drilling is correct; otherwise, it indicates that there is a problem in the drilling, and then analyze and classify the defect type according to the image morphology. The hole inspection equipment is compared with the design documents of drilling, and the manual visual inspection is compared with the film. In terms of the inspection principle, the problems caused by the film drilling errors can be avoided, and the reliability is higher.

PCB hole testing machine technology analysis

Teshikni tekshirish mashinasining PCB burg’ulash jarayonida roli quyidagi jihatlarda aks ettirilgan:

Birinchidan, samarali va barqaror burg’ulash sifatini tekshirish:

Muntazam tekshirish: gözenekli, kamroq gözenekli, katta teshik, kichik teshik va qoldiq nuqsonlari bir vaqtning o’zida minimal diafragma 0.15 mm va 8 m / min tezlikda tekshirilishi mumkin va nuqson joylashuvi belgilanadi va qo’lda hukm qilish asosini ta’minlash uchun nuqson tasviri ko’rib chiqiladi. .

Chiqindilarni tekshirish: birinchi burg’ulash tekshiruvida qoldiqlar eng diqqat markazida emas; Ammo elektrokaplamadan oldin, qoldiqlar etarlicha e’tiborga ega bo’lishi kerak. Chiqindilarning mis yog’inlarining sifatiga ta’sirini kamaytirish uchun PCB ishlab chiqaruvchilari odatda elektrokaplamadan oldin maydalash va tozalash orqali qoldiqlarni olib tashlashadi, ammo amalda u hali ham 100% toza emas, yuqori zichlikdagi plastinkani tozalash effekti yomonroq. Nazariy jihatdan, har bir PCBda qoldiqlar mavjud, shuning uchun qo’lda vizual tekshirishga tayanib, barcha mahsulotlardagi barcha teshiklarni to’liq tekshirish mumkin emas, lekin teshiklarni tekshirish mashinasi buni amalga oshiradi.

Quality improvement: stability is the biggest advantage of equipment, stable product quality can enhance the brand influence of PCB factory, directly improve the ability of manufacturers to receive orders.

Ikkinchidan, ishlab chiqarish va sifat bo’limlariga ma’lumotlarni statistik tahlil qilishda yordam berish:

Asboblarni tahlil qilish: u PCBdagi turli burg’ulash asboblarining burg’ulash teshigi diametrining o’rtacha og’ishini tahlil qilishi, burg’ulash asboblarining mumkin bo’lgan aşınmasını real vaqtda kuzatishi, noto’g’ri asbob muammosini o’z vaqtida topishi va partiyaning chiqindi plitalaridan qochishi mumkin.

Imkoniyatlarni tahlil qilish: u kunlik, oylik, choraklik va yillik ishlab chiqarish quvvati va o’rtacha ishlab chiqarish samaradorligini to’plashi, turli nazorat usullari uchun tahlil ma’lumotlarini taqdim etishi va zavodning ishlashi va boshqaruv qobiliyatini yaxshilashi mumkin.

Mashina tahlili: har bir qurilmaning chiqishi, xilma-xilligi va sifat muammolarini hisoblashi, mashinaning tafsilotlarini boshqarish qobiliyatini yaxshilashi mumkin.

Uchinchidan, xarajatlarni tejash, yuqori kirish-chiqish nisbati:

Tekshiruv xodimlari: sifatni ta’minlash va samaradorlikni oshirish uchun teshikni tekshirish mashinasi tomonidan o’rtacha 2 ~ 3 ta inspektsiya xodimlarini tejash mumkin.

Xom ashyo: u o’rta va kichik partiyalar fabrikalari uchun yanada mazmunli bo’lgan plyonkaning moddiy narxini tejashga qodir.

Customer complaint: it can save the cost of return order and fine caused by drilling defects. Although it is not as direct as the personnel and materials saved, the average annual cost saved is even higher than the purchasing cost of hole inspection machine.

PCB ishlab chiqaruvchilarining burg’ulash jarayoni uchun yuqori sifat talablari bilan, mehnat narxining oshishi va asta-sekin qo’lda tekshirish qobiliyatining etarli emasligi bosimi ostida, teshikni tekshirish mashinasining ahamiyati tobora ravshan bo’lib bormoqda.

Teshikni tekshirish mashinasidan foydalanish o’n yildan ortiq vaqtni tashkil etdi, uskunaning funktsiyasi va ishlashi doimiy ravishda yaxshilanib bormoqda va ishlab chiqarish bilan hamkorlik darajasi tobora yaqinroq. Ayniqsa, yuqori zichlikdagi taxtaning jadal rivojlanishi bilan teshiklarni tekshirish mashinasi asta-sekin asl yordamchi uskunadan asosiy yordamchi uskunaga aylantirildi. In the equipment transformation of many PCB old plants and the preparation of new plants, the popularity of hole testing machine equipment will be more and more high.