Introduction
1 PCBA Panel Cutting Machine Classification
Router-type panel cutting machine, PCB laser cutting machine, PCB punching machine, router-type panel cutting machine, board-type panel cutting machine, manual panel cutting machine, fully automatic curved panel cutting machine, fully automatic programmable curved panel cutting machine, laser cutting machine, semiconductor cutting machine, etc.
The methods for PCBA panel cutting are as follows:
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Using manual bending with a knife to grind the edges, there is no quality assurance, prohibited;
Manual bending should be force measured
Operation method: Use a fixture to break the edge of the board, then use needle-nose pliers to break the stamp hole
STRAIN value – board bending
MAX: 514.90 uSTRAIN
MIN: -1839.17 uSTRAIN
STRAIN value – stamp hole
MAX: 783.28 uSTRAIN
MIN: -1905.79 uSTRAIN
Cross-section after manual panel cutting
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Using a punching machine for fast stamping, but requires making specialized molds, long cycle, high cost, and there is stress generated during stamping which poses a risk of damage to SMD components; not recommended;
Force measurement required
Operation method: Using knife grinding fixture punching machine
STRAIN value
MAX: 1485.1314 uSTRAIN
MIN: -1339.17 uSTRAIN
Cross-section after knife mold processing
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Using V-CUT router-type panel cutting machine, during panel design, this type of equipment can only move in a straight line and requires a special V-groove design in the PCB layout; cutting will produce sparks that can damage the board and the cutting surface is not smooth and has burrs; can be used
V-CUT router-type cutting machine should be force measured Using cutting machine to cut the edge of the board STRAIN value MAX: 1064.54 uSTRAIN MIN: -770.18 uSTRAIN
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Using milling cutter-type panel cutting machine for cutting, there are no limitations in panel design, can cut any shape, can ensure product quality, programmable curved panel cutting machine, overcomes the limitations of previous router-type and board-type panel cutting machines which could only cut in a straight line, mainly using high-speed rotating milling cutters to separate multiple connected PCBs according to a pre-programmed path, replacing manual breaking or V-CUT or PUSH which caused quality hazards; recommended;
ROUTER should be force measured
Operation method:
ROUTER milling cutter panel cutting machine, milling the stamp holes
STRAIN value
MAX < 100 uSTRAIN
MIN < 100 uSTRAIN
Cross-section after routing processing
Desktop CNC Router PCBA panel cutting machine also known as
milling cutter-type PCBA panel cutting machine, router-type PCBA cutting machine, router PCBA cutting machine, milling cutter-type panel cutting machine, curved PCB panel cutting machine, programmable curved panel cutting machine, curved CNC panel cutting machine, fully automatic panel cutting machine, desktop CNC PCBA panel cutting machine, router curved substrate cutting machine, fully automatic PCBA panel cutting machine, etc.
Advantages and characteristics of programmable curved panel cutting machine: mainly utilizes high-speed rotating milling cutters to separate multiple connected PCBs according to a pre-programmed path, replacing manual breaking or V-CUT or PUSH cutting defects, high cutting precision and accuracy, no burrs, long service life, no dust, no edges, low stress, safe and easy, improves product quality, reduces scrap rate.
Currently, milling cutter-type router PCBA panel cutting machines are widely used with visual cameras for alignment and inspection.
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Laser cutting machine
No stress impact
There are limitations for PCBA thickness below 1.2mm and less than 4 copper layers, which affect cutting efficiency;
Suitable for FPC.
SMT-HOME
, like 26
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Semiconductor cutting machine, water jet cutting machine
2 Tool and Equipment Requirements
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PCBA panel cutting tool and equipment requirements |
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V-CUT connection method |
Use router-type V-CUT panel cutting machine, cutting accuracy ±0.15mm or more |
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Stamp Hole/ Real Connection Method |
Use ROUTER milling cutter panel cutting machine, cutting accuracy ±0.15mm or more (based on the distance of the protrusion/indentation from the cutting position to the corresponding edge of the board); ≤ 0.6mm thickness PCB, allows the use of laser cutting, cutting accuracy ±0.1mm or more. Cutting must use panel cutting tooling fixtures. |
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Dust Control |
Panel cutting equipment is recommended to have a necessary dust absorption control system to avoid dust residue on the PCBA. |
3 Panel Cutting Operation Requirements
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Panel Cutting Operation Requirements |
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Panel cutting operator qualification requirements |
Panel cutting station personnel must undergo specialized training and obtain certification before engaging in panel cutting operations |
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Panel cutting process requirements |
1 ) First, fix the panel cutting fixture on the cutting machine, and use 1 Panel for panel path debugging 2) After the panel path debugging is OK, it can only begin panel cutting operations after confirmation by on-site technicians or engineers 3) After panel cutting is completed, use an air gun to dust the surface of the PCBA; 4) It is recommended that the panel cutting machine has an automatic dust removal system to automatically handle dust during panel cutting operations; during the cutting process, the panel cutting fixture and machine should not have visible dust residue; EMS factories define the handling frequency themselves, and regularly manually clean the panel cutting fixtures and machines;5) If the cutting machine does not have an automatic dust removal system, after producing a certain number of panels, use a brush to clean the dust and residue from the panel cutting fixtures and machines,EMS factories define the handling frequency themselves, and must keep the cutting fixtures and machines free of visible dust residue; |
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Panel Quality Inspection |
After panel cutting, copper should not be missing, no obvious burrs allowed, and the surface of the PCBA should not have dust residue; after laser cutting, the side wall should not be blackened, and the carbonization depth should not exceed the cutting line. |
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MIC panel cutting requirements |
1) Panel cutting fixture design requirements: MIC must be sealed and protected, surrounded by walls (support base or upper cover) for protection, to prevent the suction force of the cutting machine from breaking the MIC diaphragm or allowing dust to enter; 2) After panel cutting, do not use an air gun to blow away debris from the connection strip position; debris can be improved by the suction force of the cutting equipment: for down-suction equipment, a table dust cover can be made to gather airflow and enhance the suction effect; for up-suction equipment, ensure there is sufficient suction to remove cutting debris. |
4 Stress Measurements Generated by Various Panel Cutting Methods
When the cutting stress exceeds 3000uSTRAIN, there is a risk of chip damage
Source: SMT Home
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