Carburizing and manufacturing technology for split down-the-hole drill bit

A manufacturing process and split-type technology, applied in drill bits, drilling equipment, earthwork drilling, etc., can solve problems such as waste, and achieve the effect of improving efficiency, saving costs, and improving the efficiency of repeated use.

Active Publication Date: 2014-10-29
武穴市长江工具股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The down-the-hole drill bit is a kind of drill bit used to drill mine holes. The front drill bit and the rear drill rod of t...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A split-type down-the-hole drill bit carburizing manufacturing process, the process includes the following steps: 1.1 cutting threads, cutting the top of the split drill pipe and the inside of the drill bit, wherein the threads are cut into tapered threads; 1.2 preheating, Put the separated drill bit and drill pipe into the heating furnace and heat it to 600 ° C. The heating furnace can be a multi-purpose heating furnace; 1.3 Carburizing, after the furnace temperature in step 1.2 is heated to 880 ° C, keep this temperature for 1 hour, and then rise to 920°C and maintain this temperature for 12 hours; 1.4 Pre-cooling, after the completion of step 1.3, reduce the furnace temperature to 850°C and maintain this temperature for 0.9 hours; 1.5 Quenching, put the drill bit and drill pipe processed in step 1.4 into quenching Quenching in oil for 25 minutes; 1.6 Tempering, the quenched and cooled drill bit and drill pipe are placed in the heating furnace again, heated to 170°C an...

Embodiment 2

[0015] A split-type down-the-hole drill bit carburizing manufacturing process, the process includes the following steps: 1.1 cutting threads, cutting the top of the split drill pipe and the inside of the drill bit, wherein the threads are cut into tapered threads; 1.2 preheating, Put the separated drill bit and drill pipe into the heating furnace and heat it to 630 ° C. The heating furnace can be a multi-purpose heating furnace; 1.3 Carburizing, after the furnace temperature in step 1.2 is heated to 880 ° C, keep this temperature for 1.3 hours, and then rise to 9250°C and maintain this temperature for 132 hours; 1.4 Pre-cooling, after step 1.3 is completed, lower the furnace temperature to 860°C and maintain this temperature for 1 hour; 1.5 Quenching, put the drill bit and drill pipe processed in step 1.4 into quenching Quenching in oil for 30 minutes; 1.6 Tempering, the quenched and cooled drill bit and drill pipe are placed in the heating furnace again, heated to 180°C and ke...

Embodiment 3

[0017] A split-type down-the-hole drill bit carburizing manufacturing process, the process includes the following steps: 1.1 thread cutting, thread cutting the top of the split drill pipe and the inside of the drill bit, wherein the thread is cut into parallel threads; 1.2 preheating, the The separated drill bit and drill pipe are put into a heating furnace and heated to 650 ° C. The heating furnace can be a multi-purpose heating furnace; 1.3 Carburizing, after the furnace temperature in step 1.2 is heated to 880 ° C, keep this temperature for 1 hour, and then rise to 930 ° C ℃ and keep this temperature for 14 hours; 1.4 pre-cooling, after the completion of step 1.3, lower the furnace temperature to 870 ℃ and keep this temperature for 1.1 hours; 1.5 quenching, put the drill bit and drill pipe processed in step 1.4 into quenching oil Medium quenching for 35 minutes; 1.6 Tempering, the drill bit and drill pipe after quenching and cooling are placed in the heating furnace again, h...

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PUM

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Abstract

The invention relates to a carburizing and manufacturing technology for a split down-the-hole drill bit. The carburizing and manufacturing technology comprises the following steps: thread cutting: carrying out threading cutting on the top of a drill rod and inside a drill bit, wherein the drill rod and the drill bit are split; preheating: heating the separated drill rod and the drill bit to 600-650 DEG C; carburizing: heating to 880-900DEG C and keeping the constant temperature for 1-1.5 hours, and heating to 920-930DEG C and keeping the temperature for 12-14 hours; precooling: cooling furnace temperature to 850-870DEG C and keeping for 0.9-1.1 hours; quenching: quenching the drill rod and the drill bit for 25-35 minutes; tempering: tempering the cooled drill rod and the drill bit, then heating to 170-190 DEG C and keeping for 5.8-6.2 hours, and then naturally cooling; and milling of a carburized layer of the drill bit: rubbing off the carburized part of the drill bit and guaranteeing the rubbed-off part of the drill bit to range from 2.5mm to 3mm. According to the technology, the down-the-hole drill bit which is split from the drill rod can be produced, the reuse efficiency of the drill rod can be greatly improved, the cost can be saved, and the efficiency can be improved.

Description

technical field [0001] The invention relates to a carburizing manufacturing process for down-the-hole drills, in particular to a carburizing manufacturing process for split-type down-the-hole drills. Background technique [0002] The down-the-hole drill bit is a kind of drill bit that is used to drill the mine hole. The front end drill bit and the rear drill rod of the conventional drill bit are a whole, so once the drill bit wears out, the whole drill bit must be replaced, which brings a lot of waste. How to provide a manufacturing process for separating the front-end drill bit and the rear drill rod to manufacture split-type down-the-hole drill bits has become a technical difficulty to be overcome. Contents of the invention [0003] The purpose of the present invention is to provide a carburizing manufacturing process for a split-type down-the-hole drill bit, through which a down-the-hole drill bit separated from a drill pipe can be produced, which can greatly improve th...

Claims

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Application Information

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IPC IPC(8): C23F17/00E21B10/00
Inventor 方新军胡精明
Owner 武穴市长江工具股份有限公司
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