I. Preparation Before Calibration
Tools: Level (accuracy 0.02mm/m), feeler gauge (0.01-1mm), marker, thin barley paper, cotton cloth.
Equipment Inspection: Confirm that the welding head lifting mechanism is not jammed and that the worktable is clean and free of foreign objects.
II. Mechanical Reference Calibration
Perpendicularity Calibration: Place the level horizontally/vertically on the lower end face of the welding head and adjust it with the leveling screw until the bubble is centered (perpendicularity error ≤0.05mm/100mm).
Concentricity Calibration: Place barley paper in the center of the fixture, lightly touch it with the welding head, and observe the indentation. The offset should be ≤0.1mm.
III. Parameter Settings and Optimization
Amplitude: 35μm is recommended for thin-walled parts (e.g., mobile phone cases), and 60μm or more is required for thick-walled parts (e.g., ABS).
Welding Time: 0.2-1.5 seconds for ordinary plastic parts, judged by weld depth.
IV. Process Verification
Destructive Testing: The weld strength should reach more than 80% of the base material, and the fracture location should be in the base material to be considered (qualified).
Non-destructive Testing: Infrared thermal imaging monitors the temperature field; the ideal temperature for ABS material is 190-220℃.
