Heating equipment and heating method of cast-welding iron hard die

Abstract

The invention discloses heating equipment and a heating method of a cast-welding iron hard die. The heating equipment of the cast-welding iron hard die comprises high-frequency induction coils capable of generating 20-40khz high-frequency induction magnetic force lines, wherein the high-frequency induction coils are mounted on a support base, and connected with a control cabinet by a wire. The heating method of the cast-welding iron hard die comprises the steps that a cast-welding iron hard die body is placed above the high-frequency induction coils capable of generating the high-frequency induction magnetic force lines; a reactance value is adjusted to 0.5-1.5 microhenrys; the control cabinet controls the high-frequency induction coils to run to allow the high-frequency magnetic force lines generated by the high-frequency induction coils to pass through the cast-welding iron hard die body; and the cast-welding iron hard die body is automatically heated to 150-200 DEG C within 1-2min at a high speed. The heating equipment and the heating method are high in heating speed, precise, efficient, safe and environment-friendly, and are particularly suitable for the heating of the cast-welding iron hard die in the lead accumulator industry.

Description

technical field [0001] The invention relates to a heating device and method for a cast-welding iron die, in particular to a heating device and a method for a lead-acid battery cast-weld iron die. Background technique [0002] The casting and welding of lead-acid batteries basically adopts hard mold (the base material is nodular iron or steel) casting and welding. The heating process requirements are: fast: 1-2 minutes to heat up 150-200 ° C; accurate: temperature control accuracy is controlled at ± 2.5 Within ℃; high efficiency: continuous heating frequency is 20-30 times per hour; safety: heat radiation protection at working temperature of 400-500 degrees; environmental protection: less environmental pollution. [0003] At present, the casting and welding mold heating equipment and methods used in the lead-acid battery industry, such as figure 1 As shown, resistance heating is adopted. First, the lead placed in the open-type lead-melting furnace 3 is heated and melted...

AI Technical Summary

Problems solved by technology

In order to be able to immerse 1 to 3 pairs of casting molds, the volume of the alloy furnace is 300 to 3000 kg, while the cast and welded parts in the mold are only about 0.3 kg. The difference between the two is 3 to 4 orders of magnitude. The electricity-to-heat conversion efficiency is only about 50%, resulting in high energy consumption; resistance heating is an external heating method, and due to the existence of thermal resistance and thermal inertia, it is difficult to control the temperature control accuracy within ±2.5°C; the power density of resistance heating is only About 12w / square centimeter, it is difficult to raise the temperature of the mold to 200°C within 60-120 seconds; the thermal radiation of resistive heating is strong, it is easy to leak electricity, short circuit, and the cost of manufacturing and maintenance is high; in addition, traditional resistive heating And open-type molten lead, there are also heat radiation, heat transfer medium (melted lead) secondary pollution, etc., the current environmental protection investment of lead-acid batteries accounts for 10-15% of the total investment

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