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Manufacturing method for impact threaded brazing rod

A manufacturing method and thread technology, applied in the field of drilling rod manufacturing, can solve the problems of waste, inability to change, lack of flexibility, etc., and achieve the effects of reducing production costs, reducing production time, and saving production time

Inactive Publication Date: 2019-08-27
刘艺纯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the life requirement of the 7% part, the overall heat treatment process of the drill rod makes the heat treatment of the intermediate rod body excessive, resulting in serious waste;
[0014] 2: The length, thread specification, and type of the drill rod are all determined before heat treatment, and cannot be changed after heat treatment
The product production process is too rigid and lacks flexibility;
[0015] 3: Manufacturers must use expensive well-type furnaces and their supporting equipment;
[0016] 4: The finished products are stacked in the warehouse, resulting in a large backlog of funds

Method used

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  • Manufacturing method for impact threaded brazing rod
  • Manufacturing method for impact threaded brazing rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Embodiment 1: T45-3660 ordinary drill rod,

[0074] Threaded male joint material: 23CrNi3Mo (EN40B), length 200mm.

[0075] Heat treatment method 1: Carburizing at 930°C, then air cooling, the thickness of the carburized layer is 0.8-1.0mm.

[0076] Middle rod material: 22SiMnCr2NiMo (FF710), length 3280mm.

[0077] Heat treatment method 1: carburizing at 930°C, then air cooling, the thickness of the carburized layer is 0.6-0.8mm.

[0078] a: Use friction welding to weld the processed rod body and male joint;

[0079] b: 840°C annealing treatment at the welding place to remove internal and external welding flashes, that is, welding nodules;

[0080] c: 930 ° C quenching treatment at the welding place again, and then air cooling;

[0081] d: Non-destructive testing of welds;

[0082] e: Straightening and tempering at 240°C to remove straightening stress;

[0083] f: On the lathe, both ends are corrected, the parallelism is less than 0.4mm, and the perpendicularity ...

Embodiment 2

[0085] Embodiment 2: T38-R32-3700 common drill rod,

[0086] Male connector material: 22SiMnCr2NiMo (FF710), T38 male connector length 160mm, R32 male connector length 140mm, heat treatment method 1: 930°C carburizing, then air cooling, carburized layer thickness 0.6-0.8mm.

[0087] Middle hexagonal rod material: 55SiMnMo, length 3420mm.

[0088] Heat treatment method: medium frequency continuous heating, 880°C oil quenching.

[0089] a: Use friction welding to weld the processed rod body and male joint;

[0090] f: 800°C annealing treatment at the welding place to remove internal and external welding flashes, that is, welding nodules;

[0091] g: The welding place is quenched again at 860°C, and then air-cooled;

[0092] h: non-destructive testing of welds;

[0093] i: Straightening and tempering at 240°C to remove straightening stress;

[0094] f: On the lathe, both ends are corrected, the parallelism is less than 0.4mm, and the perpendicularity to the central axis is l...

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Abstract

The invention discloses a manufacturing method for an impact threaded brazing rod. The manufacturing method comprises the following steps that (1): processing is conducted on threaded joints; (2): processing is conducted on a rod body, namely, A: a suitable-diameter round or multi-square hollow brazing tool steel material is selected; (3): the processed threaded joints are welded to the two ends of the rod body by using friction welding; (4): internal and external welding flying immediate-welding knob is removed, heat treatment and de-stressing heat treatment are conducted on the welding position, and welding non-destructive detection is conducted; (5) blasting is conducted, and straightening treatment is conducted; (6): correcting is conducted on the two end surfaces of a drilling rod ora drilling pipe; and (7): qualified inspection is conducted, and painting, packaging, and finished product warehousing are conducted. The various-product combination can be manufactured completely, astandard-length brazing rod can be processed, but also according to the customer requirements, brazing rods of different types and different lengths can be customized, and the flexible production andcustomized production are achieved.

Description

technical field [0001] The invention relates to the manufacture of drill rods and belongs to the technical field of rock drilling tools. Background technique [0002] Impact thread drill rod, also known as drill rod, drill pipe, English rod, tube is a commonly used drilling tool in the rock drilling industry, and it is also a consumable. [0003] Drilling tool steel is divided into: medium and high carbon drilling tool steel, such as 55SiMnMo, 40CrNiMo, etc., and its heat treatment method is quenching. Low-carbon drill steel, such as 23CrNi3Mo (EN40B), 25Cr3MnMo (SANBAR23), 22SiMnCr2NiMo (FF710), etc., is heat treated by carburizing and quenching, or carburizing and air cooling. [0004] At present, the manufacturing process of threaded drill rod at home and abroad is as follows. [0005] 1: Ordinary drill rod, both ends are male thread, the thread specifications can be different, there are two processing methods, the overall processing method and the friction welding proc...

Claims

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Application Information

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IPC IPC(8): B23P15/00E21B17/042
CPCB23P15/00E21B17/0426
Inventor 刘艺纯刘朋
Owner 刘艺纯
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