Intelligent Sucker Rod Induction Hardening & Tempering Machine: On-Demand Customization Delivers Personalized Heat Treatment Solutions

Industry News Release

Sucker rods bear alternating cyclic loads in deep, corrosive oil wells, demanding ultra-stable hardness, uniform metallographic structure and outstanding fatigue resistance after quenching and tempering. Conventional heat treatment equipment suffers from uneven heating, large hardness deviation, high energy consumption and rigid fixed structures that cannot adapt to mixed production of multi-size rods. The new intelligent induction Q&T machine completely solves these pain points through core intelligent technology iteration.

At its core lies a full digital closed-loop intelligent control system built on PLC+HMI multi-language touch screen terminals. Equipped with real-time infrared temperature detection, servo linkage conveying and cloud data collection modules, the equipment realizes automatic power adjustment without workpieces, automatic speed matching for different rod blanks and whole-process parameter traceability. Hundreds of process recipes can be stored in the system; operators call up matched heating, quenching and tempering curves with one click, eliminating repeated manual debugging. Built-in predictive maintenance algorithms monitor coil aging, cooling water pressure and power fluctuation 24/7, sending early failure alerts 48–72 hours in advance to cut unplanned downtime by over 60%. Machine vision online inspection synchronously detects surface decarburization, deformation and hardness consistency, lifting the one-time qualified rate of finished sucker rods to 99.8%.

induction heat treatment equipment

Energy efficiency and processing stability are further enhanced by medium-frequency IGBT series resonance induction technology. Compared with old resistance furnaces, power consumption drops by 34.6%, and a factory producing 500,000 meters of sucker rods annually saves over 1.2 million RMB in electricity costs while cutting carbon emissions by more than 900 tons per year. The rotary forward conveying mechanism ensures 360° uniform heating of rod bodies and rod heads; optimized coil-quenching ring layout shortens high-temperature air exposure time to minimize oxidation scale, controlling hardness fluctuation within ±1.5HRC, far exceeding the ±4–6HRC deviation of traditional equipment. The integrated straightening unit completes correction in the Q&T continuous flow, removing the need for independent straightening machines and streamlining the production layout.

IGBT induction heating power supply

Customization also extends to special material processes: customized induction coils and segmented temperature control modules are developed for 42CrMo, HY-grade high-strength and anti-corrosion alloy sucker rods, precisely locking the effective hardening layer depth between 2.5–3.0mm to extend underground service life significantly. For factories with limited workshop space, compact integrated layouts with shortened conveying tracks are designed; for enterprises building smart factories, reserved MES and industrial internet interfaces support seamless docking with digital workshop management platforms to form a complete intelligent production data chain.