Method for manufacturing antifriction brake hub of oil drilling and repairing device

A manufacturing method and brake hub technology, applied in the direction of manufacturing tools, welding equipment, arc welding equipment, etc., can solve the problems of poor weldability, brake hub wear resistance and poor thermal fatigue resistance, etc., to achieve good weldability, resistance Good thermal fatigue performance and good wear resistance

Inactive Publication Date: 2005-01-19
河南石油勘探局南阳石油机械厂
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Problems solved by technology

[0003] The problem to be solved in the present invention is to propose a new manufacturing method for brake hubs to solve the problems of traditional brake hubs such as poor wear resistance, poor thermal fatigue resistance, and poor weldability

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  • Method for manufacturing antifriction brake hub of oil drilling and repairing device
  • Method for manufacturing antifriction brake hub of oil drilling and repairing device

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Embodiment Construction

[0019] see figure 1 , The outer surface of the brake hub cylinder 1 is surfacing with a wear-resistant layer 2 , and the inner surface of the cylinder 1 is welded with a cooling water cavity 3 and a connecting plate 4 . Manufacturing method of the present invention is:

[0020] 1. The 16Mn steel plate with a blanking thickness of 30mm is rolled into the cylinder body 1 by a plate rolling machine, and the bevel is made at the joint of the cylinder body, and the seam of the cylinder body is welded by arc welding. After welding, the cylinder body is calibrated, and then the X-ray inspection of welds.

[0021] 2. Use an automatic submerged arc welding machine to carry out surfacing welding on the surface of the cylinder body 1, use CrMo type wear-resistant flux-cored welding wire, use double welding wires, and the thickness of the surfacing layer 2 is 9-12mm. Welding parameters: voltage 30V, current 480A, connection method is DC reverse connection, welding speed 30m / h, preheatin...

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Abstract

The invention relates to a wearproof baking hub preparing method for a petroleum drilling and repairing equipment. The preparing process includes the following steps: selecting the excellent carbon steel or low-carbon alloy steel plate, rolling the cylinder by the bending machine, welding the cylinder joint; repair welding on the cylinder surface by using the submerged arc automatic welder and using the wearproof flux-cored wire, wherein the thickness of overlay is between 7mm and 12mm, the welding parameters are as follows: voltage 30-38V, current 450-480A, direct current inversed jointing, welding speed 28-32m/h, and preheating and interlayer temperature 250-350C., having a slow cooling heat treatment in furnace after welding; welding the connection plate and the cooling water chamber by manual electric arc welding; detecting the surface defect of the cylinder joint and the overlay; machine working the cylinder end surface and the overlay top circle. The baking hub prepared by the method has the following advantages: good wear resistance, good thermal endurance, and good weldability.

Description

(1) Technical field [0001] The invention relates to a method for manufacturing a wear-resistant brake hub of a drawworks braking system of petroleum drilling and repairing equipment. (2) Background technology [0002] At present, the hub bodies of brake hubs for drawworks on drilling and repairing equipment such as oil drilling rigs, workover rigs, and drilling rigs are steel castings, and the materials are ZG18CrMnMo, ZG40CrMo, ZG35CrMo, ZG35SiMn, etc. The technical requirements for heat treatment are quenching and tempering and surface quenching. There are several problems in casting brake hubs: first, when the brake hub is working, because the surface temperature of the brake hub is very high, which can reach 900°C, the hardness is very low due to the high temperature at this time, and the wear resistance is reduced; second, After the brake is released, the surface temperature of the brake hub drops rapidly within 3-5 seconds. Due to periodic heating and cooling, the bra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/12B23P15/00
Inventor 赵旭平仵世平王文尔梁晓宇杨森李春明
Owner 河南石油勘探局南阳石油机械厂
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