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

An induction heating and induction heater technology, which is applied in the field of pipe fitting elbow manufacturing, can solve the problems of difficulty in medium frequency induction heating, thinness, and difficulty in reaching the temperature of the tube blank, and achieves accurate size, accurate bending angle, and less surface oxide scale. Effect

Active Publication Date: 2008-06-11
NINGBO LIANTONG EQUIP MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 v

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Embodiment 1, the medium frequency induction heating in the present embodiment pushes the technology of the elbow that the material is carbon steel:

[0021] Step 1: Insert at least a section of the tube blank 4 from the end of the mandrel 6 of the horn mandrel to the rod body of the mandrel 6, and move the tube blank 4 along the rod body to the horn head 7 of the horn mandrel and approach it. The horn core head 7 of the horn mandrel; the end of the core rod 6 is passed through the middle of the push plate 3 and connected to the fixed end 2, so that the tube blank 4 is located on the side of the push plate 3 facing the horn core head 7 of the horn mandrel, And the periphery of the orifice of the tube blank 4 is abutted against the periphery of the through hole of the push plate 3;

[0022] Step 2: At least two symmetrically arranged propulsion cylinders 1 are connected to the propulsion plate 3 and the tube blank 4 is moved along the mandrel 6 to the horn core head 7 at...

Example Embodiment

[0026] Example 2

[0027] The intermediate frequency induction heating in the present embodiment pushes the process of the elbow made of non-magnetic austenitic stainless steel:

[0028] Step 1: Insert at least a section of the tube blank 4 from the end of the mandrel 6 of the horn mandrel to the rod body of the mandrel 6, and move the tube blank 4 along the rod body to the horn head 7 of the horn mandrel and approach it. The horn core head 7 of the horn mandrel; the end of the core rod 6 is passed through the middle of the push plate 3 and connected to the fixed end 2, so that the tube blank 4 is located on the side of the push plate 3 facing the horn core head 7 of the horn mandrel, And the periphery of the orifice of the tube blank 4 is abutted against the periphery of the through hole of the push plate 3;

[0029] Step 2: At least two symmetrically arranged propulsion cylinders 1 are connected to the propulsion plate 3 and the tube blank 4 is moved along the core rod 6 to...

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PUM

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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 ...

Claims

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Application Information

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IPC IPC(8): B21D9/12B21D9/04B21D9/18
Inventor 连海峰蔡丽萍
Owner NINGBO LIANTONG EQUIP MFG
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