A kind of hot extrusion processing method for North American axles

Abstract

The invention discloses a hot extrusion processing method for North American axles. It includes the following steps: A. Heating the entire shaft head of the shaft tube before thickening, and thickening extrusion after heating; B. Cooling the shaft tube after thickening, and closing the shaft head of the shaft tube Carry out one-time extrusion heating on the part, and perform a closing extrusion after the heating is completed; C. After the first closing extrusion is completed, perform a second extrusion heating on the transition joint part of the shaft head of the shaft tube, and perform a second extrusion heating after the second extrusion heating is completed. The second pre-forming extrusion and the third extrusion form the preliminary shaft tube oil seal; D. After the preliminary shaft tube oil seal is formed and extruded, the shaft tube is left to stand, and the entire shaft head of the shaft tube is extruded four times Pressing and heating, four times of extrusion and five times of extrusion are performed after four times of extrusion and heating to form the final shaft tube oil seal. The advantages are: it can stably produce North American axles with large and small axle heads, reduces rework rate, reduces manufacturing cost, and improves production efficiency and product quality.

Description

technical field [0001] The invention relates to a production method of North American axles, in particular to a hot extrusion processing method of North American axles. Background technique [0002] In the one-piece semi-trailer axle, North American axles mainly have two types of axle heads, small and large, and double-large. The method of thick extrusion + four-time thermoforming extrusion step-by-step forming is used for the production of rough parts; the existing production process, due to the limitation of the process itself, is prone to oil seals during secondary extrusion during the production process. Insufficient molding requires rework and welding of the oil seal of the shaft head, which may even result in scrapping. The temperature control requirements for the intermediate frequency heating of the equipment are also high, which reduces the product qualification rate and increases the manufacturing cost. Contents of the invention [0003] The technical problem to...

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Problems solved by technology

[0002] In the one-piece semi-trailer axle, North American axles mainly have two types of axle heads, small and large, and double-large. The method of thick extrusion + four-time thermoforming extrusion step-by-step forming is used for the production of rough parts; the existing production process, due to the limitation of the process itself, is prone to oil seals during secondary extrusion during the production process. Insufficient molding requires rework and welding of the oil seal of the shaft head, which may even cause scrapping. The temperature control requirements for the intermediate frequency heating of the equipment are also high, which reduces the product qualification rate and increases the manufacturing cost.

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