Technique and device for push-making angle fitting by intermediate frequency induction heating

Abstract

The invention discloses a process of intermediate frequency induction heating propelling elbows and a device of the process. The process comprises coating at least one section of tube blank on a core rod from the terminal end of the core rod, fixing the terminal end of the core rod on the fixing end of the core rod, adopting hydraulic pressure to propel the tube blank through a propelling plate, heating the tube blank which is propelled on a horn core joint portion through a heater of the intermediate frequency inductions, thermal-deformating the tube blank which is propelled through a deforming section of the horn core joint, and squeezing a needing shaped elbow through a shaping section. The device of the process comprises a propelling oil cylinder, a fixing end of the core rod, the propelling plate, the core rod, the horn core joint, the heater of the intermediate frequency inductions, a piston and a connecting rod, wherein the core rod and the horn core joint are welded together into a horn core bar, the horn core joint is composed of a deforming section and a shaping section, a transverse section of the shaping section takes a positive round shape, the transverse section of the deforming section takes a oval shape, a circle center of the positive round shape and a central point of the oral shape are located on a central arc line of the horn core bar, both a long axle of the oral shape and a short axle of the oral shape are vertical to the central arc line of the horn core bar, the long axle of the oral shape is also vertical to a plane, and the central arc line of the horn core bar is located on the plane.

Description

technical field [0001] The invention relates to various chemical production devices and the field of manufacturing pipe fitting elbows in industrial furnaces, in particular to a process and a device for pushing elbows by medium frequency induction heating, which are used for manufacturing pipe fitting elbows with uniform pipe wall thickness. Background technique [0002] At present, there are many processes and equipments for pushing elbows using intermediate frequency induction heating in the market. This process usually pushes the tube blank through a propulsion mechanism, softens the tube blank through intermediate frequency induction heating, and finally makes the tube blank through the horn core head. The elbow, the equipment usually includes two parallel mounted propulsion cylinders, pistons, connecting rods and fixed ends of the mandrels, propulsion plates, mandrels, horn mandrels, intermediate frequency induction heaters, the pistons are located in the cylinders, and ...

AI Technical Summary

Problems solved by technology

However, these processes and their equipment usually have the following problems: First, when pushing some elbows made of non-magnetic alloys as raw materials, such as non-magnetic austenitic stainless steel, medium-frequency induction heating is very difficult, making it difficult to Reach the required temperature; secondly, when the ordinary process and its equipment push the thick-walled elbow, it is easy to produce the problem that the inner side is thicker and the outer side is thinner

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