The PCB kartasi is generally glued together by several layers of resin material, and the internal copper foil is used for wiring, and there are 4, 6, and 8 layers. Among them, drilling occupies 30-40% of the cost of printed circuit boards, and mass production often requires specialized equipment and drill bits. Good PCB drill bits use good quality cemented carbide materials, which have high rigidity, high hole position accuracy, good hole wall quality, and long life.

There are many factors that affect the hole position accuracy and hole wall quality of drilling. This article will discuss the main factors that affect the hole position accuracy and hole wall quality of drilling, and propose corresponding solutions for your reference.
Teshikdagi tolalar proturuziyasi nima uchun chiqib turadi?

1. Possible reason: the retracting rate is too slow.

Qarshi chora: pichoqni orqaga chekinish tezligini oshiring.

2. Mumkin sabab: matkap uchining haddan tashqari aşınması

Countermeasures: sharpen the drill point again and limit the number of hits per drill point, such as 1500 hits on the line.

3. Possible reasons: insufficient spindle speed (RPM)

Countermeasures: adjust the feed rate and rotation speed to the best condition, and check the rotation speed variation.

4. Possible reason: feed rate is too fast

Qarshi chora: besleme tezligini (IPM) kamaytiring.

Nima uchun teshik devorlari qo’pol?

1. Mumkin sabab: ozuqa miqdori juda o’zgargan.

Countermeasure: Maintain a fixed feed amount.

2. Possible reason: feed rate is too fast

Countermeasures: Adjust the relationship between the feed rate and the drill speed to the best condition.

3. Possible reason: improper selection of cover material

Countermeasure: Replace the cover material.

4. Possible reason: insufficient vacuum used for the fixed drill

Countermeasures: Check the vacuum system of the drilling machine, and check whether the spindle speed changes.

5. Mumkin bo’lgan sabablar: g’ayritabiiy retraktsiya tezligi

Countermeasures: adjust the relationship between the retraction rate and the drill speed to the best condition.

6. ​​Possible reasons: the cutting front edge of the needle tip appears to be broken or broken

Countermeasures: Check the condition of the drill bit before getting on the machine, and improve the habit of holding and taking the drill bit.

Nima uchun teshik shaklining yumaloqligi etarli emas?

1. Mumkin sabab: shpindel biroz egilgan

Countermeasure: Replace the bearing in the main shaft (Bearing).

2. Mumkin bo’lgan sabablar: burg’ulash uchining eksantrikligi yoki chiqib ketish tomonining turli kengligi

Qarshi choralar: Mashinaga tushishdan oldin matkap uchini 40 marta kattalashtirish bilan tekshiring.

Nima uchun taxta yuzasida singan lotus ildizlari bo’lgan burmalangan qoldiqlar bor?

1. Mumkin sabab: qopqoq ishlatilmaydi

Qarshi chora: qopqoq plitasini qo’shing.

2. Mumkin sabab: noto’g’ri burg’ulash parametrlari

Countermeasures: reduce the feed rate (IPM) or increase the drill speed (RPM).

Nima uchun burg’ulash pinini sindirish oson?

1. Possible cause: excessive run-out of the spindle

Countermeasure: Try to deflect the main shaft.

2. Mumkin bo’lgan sabab: burg’ulash mashinasining noto’g’ri ishlashi

Qarshi choralar:

1) Check whether the pressure foot is blocked (STIcking)

2) Matkap uchining holatiga ko’ra bosim oyog’ining bosimini sozlang.

3) Mil tezligining o’zgarishini tekshiring.

4) Milning barqarorligini tekshirish uchun burg’ulash ish vaqti.

3. Possible reason: improper selection of drill bits

Qarshi choralar: matkap uchining geometriyasini tekshiring, burg’ulash uchi nuqsonlarini tekshiring va tegishli chip chuqurchaga uzunlikdagi matkap uchidan foydalaning.

4. Mumkin sabablar: matkap tezligining etarli emasligi va juda yuqori besleme tezligi

Qarshi chora: besleme tezligini (IPM) kamaytiring.

5. Mumkin sabablar: laminat qatlamlari soni ortdi

Countermeasure: Reduce the number of layers of the laminated board (Stack Height).