Extruded aluminium section die for vehicle condenser tube

Abstract

The invention relates to an extruded aluminum section die used in an automobile condenser tube. The aluminum section die is used for the extrusion forming of the automobile condenser tube. A 'cross core insert' type male die (1) is embedded into a 'fork type' female die (2) to form a 'sub-die', and two or more than two 'sub-dies are inserted into a main body die (3) to form a 'main-slave die' together with the main body die (3). A split flow bridge (1.2) is formed in the center of a feeding face of the 'cross core insert' type male die (1); handle parts (1.4) are formed at the left side and the right side of the split flow bridge (1.2); a groove (2.4) is formed by longitudinally milling the center of the feeding face of the 'fork type' female die (2); a die cavity (2.1) formed by hard alloy blocks (2.2) is inserted into the center of the bottom of the groove (2.4), and the center of the bottom of the groove is transversely milled to form a caulking groove (2.5); the split flow bridge (1.2) separates the groove (2.4) into a front and a rear 'open' split flow holes (1.1); after the 'sub-die' is assembled into the main body die (3), a hermetical welded chamber is formed at the 'open' split flow holes (1.1). The die can reduce the stress on the die during extrusion, enhance the production efficiency of the die, and lead wear resistance of the die to be better.

Description

(1) Technical field [0001] The invention relates to a mold, in particular to an aluminum profile hot extrusion mold for automobile air conditioner condenser tubes. Mainly used for extrusion molding of automobile condenser tubes. It belongs to the field of mold processing technology. (2) Background technology [0002] With the development of the automotive industry, aluminum profiles for automotive air conditioning condenser tubes (see Picture 11 ) Is in increasing demand and more and more varieties. This type of wood has a common feature: [0003] 1. The wall thickness is thin, some are only 0.4mm; [0004] 2. The section of the profile is small, the smallest is only 2mm, and the profile has many hollow structures with multiple reinforcing ribs; [0005] 3. The profile size tolerance and welding quality requirements are quite strict; [0006] 4. The cross-sectional area of ​​the profile is small, the extrusion ratio is large, the pressure is large during extrusion, the profile i...

AI Technical Summary

Problems solved by technology

[0005] 3. The size tolerance and welding quality requirements of profiles are quite strict;

[0006] 4. The cross-sectional area of ​​the profile is small, the extrusion ratio is large, the pressure is high during extrusion, the profile is not easy to form, and the small core is easy to break

Because of the large extrusion ratio and small mold core, it is difficult to develop such products successfully according to the design and processing methods of conventional molds.

Ordinary extrusion dies are composed of a lower die and an upper die. The upper and lower dies are fitted with circular spigots, fixed with screws, and the positioning pins are anti-rotationally connected. Large restrictions make the feed inlet of the mold small, increase the extrusion force during extrusion, and reduce the welding performance of the profile; due to the large extrusion ratio of this type of material, the mold is subjected to a "one out one" extrusion The pressure is high and the production efficiency is low; the working belt of the lower mold is not inlaid with cemented carbide, the wear resistance of the mold is poor, and the mold is prone to out-of-tolerance phenomena

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