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Molding process of header body

A molding process and box technology, which is applied in the direction of boiler drum/box header, fluid heater, lighting and heating equipment, etc., can solve the problems of inapplicability, and achieve good tightness, stable quality and uniform pipe wall Effect

Active Publication Date: 2014-09-10
河南光大管业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pipe fittings with larger diameters are difficult to reshape after processing the branch pipes, so this process is only suitable for tees with smaller diameters
It is not suitable for headers with larger pipe diameters

Method used

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  • Molding process of header body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The molding process of the boiler header body includes the following steps:

[0062] Step 1. Use steel ingot as the material for the header body, heat it at 1000°C for 1.5 hours, and then forge it into a round steel column.

[0063] Step 2. Put the forged round steel column into the heating furnace for heating, the heating temperature is 1300°C, take out the round steel column after burning red, put it on the punching machine, and punch out a through hole 11 along the central axis of the round steel column , and make the tube blank 10.

[0064] Step 3: Send the tube blank 10 into the heating furnace, heat it at 1030°C for 1 hour, take it out, insert a central shaft 12 into the through hole in the center of the tube blank 10, and then send the tube blank 10 into the forging machine , forged into a round tube with the required wall thickness, and the central shaft is drawn out after forging.

[0065] Step 4: Put the round tube forged in Step 3 into the heating furnace, ...

Embodiment 2

[0077] The molding process of the boiler header body includes the following steps:

[0078] Step 1. Use steel ingot as the material for the header body, heat it at 1030°C for 2 hours, and then forge it into a round steel column.

[0079] Step 2. Send the forged round steel column into the heating furnace for heating. The heating temperature is 1350°C. After burning red, take out the round steel column. The specific heating time is determined according to the size of the round steel column to meet the needs of subsequent punching operations. Accurate, take it out and place it on a punching machine, and punch out a through hole 11 along the central axis of the round steel column to make a tube blank 10.

[0080] Step 3: Send the tube blank 10 into the heating furnace, heat it at 1050°C for 2 hours, take it out, insert a central shaft 12 into the through hole in the center of the tube blank 10, and then send the tube blank 10 into the forging machine , forged into a round tube w...

Embodiment 3

[0093] The molding process of the boiler header body. The header body is provided with a branch pipe interface with a larger diameter, and a row of branch pipe connections with a smaller diameter is provided on both sides of the pipe wall opposite to the interface. The molding process includes the following step:

[0094] Step 1. Steel ingots are used as the material for the header body, heated at 1100° C. for 2.5 hours, and then forged into round steel columns.

[0095] Step 2. Send the forged round steel column into a heating furnace for heating at a temperature of 1500°C. After burning red, take out the round steel column, put it on a punching machine, and punch a through hole 11 along the central axis of the round steel column. The tube blank 10 is made.

[0096] Step 3: Send the tube blank 10 into the heating furnace, heat it at 1100°C for 1 hour, take it out, insert a central shaft 12 into the through hole in the center of the tube blank 10, and then send the tube blank...

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Abstract

The invention provides a molding process of a header body, comprising the following steps of manufacturing a circular pipe by using a steel ingot, adding into a heating furnace to be treated and carrying out turning machining to form a header main body pipe; determining the position of each branch pipe connector on the header main body pipe, and drilling a positioning hole; sending into the heating furnace to be heated and taking out; upwards putting a semicircular surface provided with a positioning hole and downwards putting the semicircular surface into water for cooling; then placing on a die and ejecting a convex bag at the position of the positioning hole in the pipe wall of the header main body pipe; drawing the convex bag by utilizing a chambering die core to form a pipe wall blank of the branch pipe connector, and finishing to form a connector pipe of the branch pipe connector; and carrying out annealing treatment on the header body, detecting, brushing paint and leaving from a factory. The pipe connector and the header body are connected to form an integral structure and are connected in a seamless manner so that the tightness is good; and with the adoption of a process for cooling one surface after heating, the header main body pipe does not deform and the whole size of a machined header body is uniform.

Description

technical field [0001] The invention relates to a forming method of a metal pipe provided with a branch pipe interface on the pipe wall, in particular to a forming process of a header body. Background technique [0002] The boiler header, also known as the header, is used to connect the branch pipes in the boiler, so that the water in the branch pipes can be collected in the header and distributed to the next-level branch pipes. Therefore, a plurality of pipe joints are distributed on the pipe wall of the header body. The usual processing method is to punch a hole on the main pipe of the header body, and then weld the interface pipe at the position of the punched hole. Since the nozzle of the interface pipe is difficult to precisely match the interface hole punched on the header body, this processing method has high requirements on the welding process, the weld seam is large, the welding quality is unstable, and the weld seam is easy to crack. For the pressure vessel of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00F22B37/22F24H9/00
Inventor 张敬业范国
Owner 河南光大管业有限公司
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