Gradient Flame Heating for Drill Steel Billet Density Control
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Solution Overview
Problem
The uniform heating method for drill steel pipe billets leads to radial density differences, resulting in increased susceptibility to radial fractures and reduced service life due to uneven deformation during the rolling process.
Innovation Solution
A heating system utilizing a low-temperature, medium-temperature, and high-temperature flamethrower with a gradient flame heating method, controlled by a propulsion, positioning, and temperature measuring device, along with a feedback system to adjust temperature distances, ensuring uniform radial density and deformation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform heating method is used for drill steel pipe billet, then heating process is simple, but radial density differences occur causing radial fractures
Solution Approach 1:
The patent applies local quality by using three flamethrowers positioned at different radial locations (inner, middle, outer rings) to create different heating intensities at different radial positions. The inner ring flamethrower heats the center region, the middle ring flamethrower heats the intermediate region, and the outer ring flamethrower heats the outer region, ensuring each region receives appropriate heat treatment to achieve uniform density throughout the billet.
Solution Approach 2:
The heating system is segmented into three independent flamethrowers, each responsible for a specific radial zone of the billet. This segmentation allows independent control of heating parameters for different regions, enabling precise temperature distribution control that eliminates radial density differences while maintaining manageable system complexity.
2Device complexity
If uniform heating method is used for drill steel pipe billet, then heating equipment is simple, but deformation is uneven during rolling
Solution Approach 1:
The patent implements local quality by configuring three flamethrowers with different heating capacities and positions to address the specific heating needs of different radial zones. The inner ring flamethrower provides concentrated heating to the center, the middle ring flamethrower addresses the intermediate zone, and the outer ring flamethrower treats the outer region, ensuring uniform deformation characteristics throughout the billet during rolling.
Solution Approach 2:
The heating equipment is divided into three separate flamethrower units, each controlling a specific radial sector. This segmentation enables independent adjustment of heating parameters for each zone, achieving precise control over temperature distribution and resulting deformation uniformity without requiring overly complex integrated heating systems.
3Manufacturing precision
If internal density is improved by multiple rolling, then drill steel quality increases, but radial fractures still occur due to initial radial density differences
Solution Approach 1:
The patent applies preliminary action by implementing gradient flame heating before the rolling process to pre-uniformize the radial density distribution of the billet. By addressing the radial density differences in advance through controlled thermal treatment, the subsequent rolling process produces uniformly dense drill steel that is resistant to radial fractures, eliminating the need for corrective measures after rolling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system achieves uniform radial density and improved deformation control, enhancing the quality and extending the service life of drill steel by ensuring the internal temperature is higher than the external, thus preventing radial fractures.
Implementation Method 1
providing a low-temperature flamethrower, a medium-temperature flamethrower and a high-temperature flamethrower, and by using a rolling forming method with gradient flame heating
Implementation Method 2
gradient flame heating
Implementation Method 3
the electric motor controls the propulsion rod to move back and forth in the shrink cylinder
Implementation Method 4
the temperature measuring device includes an infrared thermometer for point A, an infrared thermometer for point B
Data Source
AI summary
A heating system for drill steel pipe billet includes a feedback device configured to control distances d1 and d2 of three flamethrowers, a propulsion device, a positioning device, a heating device, a temperature measuring device and a conveying device. Heating temperature of the flamethrowers is controlled by an oxygen distribution box and a gas distribution box. A heating method for the drill steel pipe billet is also provided, in which a rolling forming method of gradient flame heating is adopted to control density of the rolled pieces and avoid internal defects of the drill steel caused by the same deformation of the traditional uniformly heated pipe billets. A radial temperature of the drill steel pipe billet is accurately controlled through the feedback device. Only one set of flamethrowers corresponding to drill steel pipe billets of different dimensions is required, and other devices are universal components, which will not be replaced.