May. 20, 2026
Share:Vertical-door box-type tempering furnace is a piece of equipment used in industrial heat treatment processes, primarily for the tempering of metal workpieces. By controlling the temperature and atmosphere inside the furnace, this equipment enables workpieces to achieve the desired mechanical properties and microstructure during the heating process. The following sections provide a detailed overview of the equipment’s specifications, structural features, operating procedures, and maintenance guidelines.
1. Equipment Overview
The lift-door box-type tempering furnace features a vertically lifting furnace door design, facilitating the loading and unloading of workpieces. The furnace structure typically consists of the furnace shell, furnace lining, heating elements, lifting mechanism, and control system. This equipment is suitable for batch tempering of small to medium-sized workpieces and is widely used in industries such as mechanical manufacturing and automotive parts processing.
Main Technical Specifications for tempering furnace
| Parameter | Specifications |
| Operating Temperature Range | 200–750 °C |
| Common Operating Temperature | 300–650 °C |
| Chamber Dimensions (L×W×H) | 600×800×600 mm; 800×1000×800 mm; 1000×1200×1000 mm; other specs available |
| Rated Power | 45 kW, 60 kW, 75 kW, etc. |
| Rated Voltage | 380 V |
| Number of Phases | 3-phase |
| Number of Heating Zones | 1 or 2 zones |
| Temperature Control Accuracy | ±3 °C |
| Furnace Temperature Uniformity | ±5 °C |
| Heating Rate | ≤200 °C/hour |
| Loading Capacity | 200 kg, 300 kg, 500 kg, etc. |
3. Structural Features
(1) The furnace shell is constructed from welded steel plates, with the outer surface treated for rust prevention.
(2) The furnace lining consists of refractory and insulation materials, typically employing a ceramic fiber module structure that provides excellent thermal insulation.
(3) Heating elements are arranged on both sides or at the top of the furnace chamber, utilizing resistance wire or resistance bands as heating elements.
(4) The furnace door lifting mechanism consists of a motor, reducer, chain, or steel wire rope, ensuring smooth and reliable operation.
(5) The furnace door seal employs mechanical compression or a pneumatic sealing device to ensure the integrity of the furnace chamber seal.
(6) Equipped with a circulation fan to promote airflow within the furnace and improve temperature uniformity.
4. Control System
(1) The temperature control system utilizes an intelligent programmable temperature controller capable of setting and storing multiple process curves.
(2) Features over-temperature protection; when the temperature exceeds the set value, the heating power is automatically cut off.
(3) Equipped with a data logger to record temperature changes in real time during the process.
(4) The operating interface uses a touchscreen or push-button controls for convenient parameter setting and equipment operation.
(5) It features a self-diagnostic function that displays the type and location of any faults.
5. Safety Protection Devices
(1) Power supply overload protection
(2) Heating element open-circuit alarm
(3) Power-off interlock when the furnace door is opened
(4) Circulating fan overload protection
(5) Grounding protection
(6) Over-temperature protection
The performance specifications of the lift-door box-type tempering furnace must be determined based on specific process requirements during equipment selection. During operation, strictly adhere to operating procedures and perform regular maintenance to ensure long-term, stable operation of the equipment.
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