Packaging mold for three-way catalytic converter

Abstract

The invention relates to a packaging mold of a ternary catalytic converter and a packaging method thereof. The packaging mold comprises a cylindrical mold body; and the mold body consists of multiple mold pieces with the same size. The packaging mold is characterized in that the mold pieces are fan-shaped blocks and consist of two-groove mold pieces and three-groove mold pieces; the two-groove mold pieces and the three-groove mold pieces are pairwise arranged at intervals; the cross sections of the two-groove mold pieces and the three-groove mold pieces are fan-shaped, and the inner and outer surfaces thereof are respectively arc surfaces; three parallel groove bodies are respectively arranged at the two ends and the middles of the inner surfaces of the three-groove mold pieces; and two parallel groove bodies are respectively arranged at the two ends of the two-groove mold pieces. The packaging method comprises the following process steps: (1) the outer diameter of a carrier is measured; and a pad is weighed; (2) after the pad coats the carrier, the pad is pushed into the cylinder; (3) the diameter of the cylinder is shrunk; and (4) the two ends of the cylinder are shrunk. When the diameter of the cylinder is shrunk, a local avoiding method is adopted, so that the fitting gap of welding parts can be guaranteed, and the welding trajectory in welding lines is locked.

Description

technical field [0001] The invention relates to a packaging mold and a packaging method for a three-way catalytic converter, belonging to the technical field of packaging of automobile exhaust systems. Background technique [0002] In recent years, the smog weather that has occurred continuously in many places across the country has not only made low-carbon environmental protection a hot topic again, but also promoted the upgrading of various types of vehicle emission standards; there are many technologies for controlling vehicle pollutant emissions. There are two types of purification technology and external purification technology; the internal purification is completed by the engine, and the task of external purification is handed over to the three-way catalytic converter in the exhaust system; the automobile emission standard is in the second to fourth stages of the country. The three-way catalytic converter is placed in the exhaust system, which is called a chassis-type...

AI Technical Summary

Problems solved by technology

Due to the large tolerance of the ceramic carrier and the liner, the diameter of the cylinder A after the diameter reduction is too large to be different from the diameter of the cylinder B before the diameter reduction, that is, the shrinkage C is large, and the tooling fixture cannot position the cylinder. The seam trajectory is also a variable value. The matching clearance of other parts of the cylinder changes too much, and the automatic welding of the product cannot be realized. How to talk about the welding quality of the product

[0004] In addition, the caliber of the end cap or manifold that fits with the cylinder is a constant value, and the overall diameter reduction method of the cylinder will cause the size of the fit gap to be different, resulting in the phenomenon of missing welding and virtual welding during welding, and even lead to ternary Breakage of the catalytic converter

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