Magnetic particle inspection machine
CJW-9000 MPI Machine for Large-Size Connecting Rods
Special-purpose wet fluorescent magnetic particle inspection machine for connecting rods up to 600 mm in diameter, 700 mm turning diameter and 2,000 mm long. It detects surface and near-surface cracks and slag inclusions arising from forging, grinding and fatigue.
- Large connecting rods
- Marine & diesel engines
Product details
The machine is specially designed for connecting rods such as DK20, DK26, DK28, DK36, DC17, DC32, PS26, WD250, MAN23/30, MAN16/24, MAN21/31, MAN27/38 and MAN32/30.
It is a special-purpose combined magnetic particle inspection machine whose electrical and mechanical mechanisms are independent of each other. It consists of the power supply control system, machine tool system, clamping system, bracket system, circular magnetization device, longitudinal magnetization device, multidirectional compensation magnetization device for both ends of the part, demagnetization device, and magnetic suspension spraying and recycling system.
Circular magnetization: an electrode is paired with a second electrode to form a magnetic loop around the connecting rod.
Longitudinal magnetization: the axial field of a U-shaped three-dimensional magnetizer magnetizes the rod lengthwise, and its three-dimensional field is also used to inspect the connecting rod bore.
Combined magnetization: the electrode loop completes circular magnetization while the magnetizer applies the longitudinal field.
Because an AC field has uncontrollable polarity, multiple magnetizing channels and an offset effect, the polarity of the circular DC field is controlled to give a uniform field.
Owing to the skin effect, AC alone suits open defects no deeper than 1.5 mm and is less sensitive to hidden defects. AC/DC magnetization is therefore used, so that defects do not reappear during machining and cause costly rejections.
CJW-9000 specifications
Magnetization
- Circular magnetization
- DC 0–9,000 A (average), continuously adjustable, full-wave rectified; tangential field 2,000–5,000 A/m
- Longitudinal magnetization
- AC 0–24,000 AT and DC 0–24,000 AT (average), continuously adjustable; tangential field 2,000–5,000 A/m
- Magnetization methods
- Circular, longitudinal, combined
- Magnetization duty cycle
- 35%
- U-shaped magnetizer dimensions
- 200 mm + 700 mm × 700 mm + 400 mm
- Operation
- Manual / automatic
Mechanics
- Workpiece diameter and length
- Ø ≤ 600 mm; turning Ø ≤ 700 mm; length ≤ 2,000 mm
- Clamping
- Pneumatic, operated from the control panel
Performance
- Standards
- Designed and manufactured to ASTM E1444, ASTM E709, European CEN standards, GB/T 15822.3-2005 and JB/T 8290-2001
- Sensitivity
- Four bore indications clearly shown on the ASTM Type-B ring, tested per JB/T 6065-92
- Demagnetization
- Attenuating, 24,000–0 AT continuously adjustable; remanence ≤ 0.2 mT; duty cycle 35%
External coil port
Cable-wrap magnetization for oversized parts
Every machine's power cabinet has an external coil port. When a part is too large or heavy to load into the machine, connect a flexible cable to the port and wrap it around the part to form a coil, so the part can be magnetized where it stands.
Coil port
Inquiry
Tell us about your workpiece.
Share the component, dimensions, material and inspection workflow. An engineer will recommend a configuration.
- Telephone
- +86 153 5150 2281
- +86 153 5823 8171
- Address
- No. 6 Xinchuan Road, Tinghu District, Yancheng, Jiangsu, China
