What is the DT4C Electromegnet Iron Core
DT4C Electromegnet Iron Core is designed for magnetic flux conduction in electromagnetic relay assemblies, where saturation flux density, coercivity, and dimensional accuracy affect armature attraction and release behavior. Magnetic performance must be verified against the specified material grade and test conditions rather than assumed from the designation alone. Factory-direct manufacturing supports custom core geometries based on engineering drawings or samples, with dimensional inspection, material traceability, and wholesale OEM supply for relay production.
Manufacturing Process of Relay Pin Core
Precision Cold Heading and Stamping
Initial blanking utilizes high-speed mechanical presses equipped with carbide tooling. This approach delivers high dimensional repeatability for complex yoke profiles while maintaining structural integrity before machining.
High-Precision CNC Machining
Multi-axis CNC turning and milling centers cut tight locating diameters, counterbores, and mounting threads. Tool path programming minimizes mechanical work hardening, preserving the base metal's soft magnetic state.
Controlled Atmosphere Annealing
Components undergo high-temperature annealing in a vacuum or pure hydrogen atmosphere. This thermal cycle relieves cold-working stress, repairs crystal lattice dislocations, and enlarges grain size to restore maximum permeability.
In-Process Cleaning and Degreasing
Multi-stage ultrasonic aqueous cleaning lines remove residual drawing oils, cutting fluids, and particulate matter, leaving chemically clean surfaces ready for downstream electroplating or coil assembly.
Technical Specifications & Materials of Straight Coil Core
| Parameter | Dimension Specification |
|---|---|
| Initial Permeability | ≥ 4.0 × 10⁻³ H/m |
| Coercivity | ≤ 48 A/m |
| Saturation Magnetic Induction | ≥ 1.95 T (H = 8000 A/m) |
| Carbon Content (C) | ≤ 0.004% |
| Hardness | 70 - 90 HRB |
| Dimensional Tolerance | ± 0.01 mm to ± 0.02 mm |
Mechanical Reliability and Relay Integration of Relay Magnetic Core
Magnetic Attraction & Armature Travel
The iron core forms the relay magnetic circuit to pull the armature. Magnetic gap, pole geometry, coil excitation and armature alignment decide force and stroke. Minor dimensional deviations can shift magnetic gap and alignment, so core dimensions must match relay operating requirements.
01
Residual Magnetism & Release Behavior
Residual magnetism may hinder armature release, critical for relays requiring low release force or fast reset. Release performance relies on material, core geometry, magnetic circuit, surface finish and thermal treatment. Full relay assembly tests are required to validate release voltage, timing and operating cycles.
02
Surface Condition & Assembly Fit
Core surface quality impacts assembly fit and magnetic interface. Burrs, dents, oxidation or uneven finishing cause assembly interference and alter air gap. Inspect magnetically critical surfaces; protective coatings must meet thickness, coverage and magnetic requirements.
03
Verification Under Operating Conditions
Material and dimension certificates cannot substitute functional relay tests. Validation shall replicate real coil voltage, duty cycle, temperature and motion parameters. Agree on acceptance criteria before production testing, checking pickup/release voltage, switching time, temperature rise and operational stability.
04
contact us
Submit your drawings and magnetic acceptance criteria now to obtain a factory quotation for Core Pin wholesale and custom production, including manufacturing review, dimensional inspection planning, and OEM batch supply.
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