The Production Process of Rock Drilling Tools

Table of Contents

As people’s demand for safety and efficiency in operations increases, it directly promotes the development of equipment and tool products. Enterprises in the field of rock drilling and anchoring engineering have been committed to creating safer and more efficient solutions. Therefore, their technology is increasingly developing in a more economical and more efficient direction.

Based on such a market prospect, rock drilling tools, as products supporting rock drilling machinery, are widely used in geotechnical engineering fields such as mining, hydropower, tunnels, culverts, subways, and municipal construction and have become essential tools in production and construction in the development of modern human material civilization, and its growth also directly affects the development of rock drilling engineering field.

There are many varieties and specifications of rock drilling tools, and they are used in different ways. From the article “Types of Rock Drilling Tools”, we can learn that according to the type of rock drilling machinery used in geotechnical drilling engineering, there are six types of rock drilling tools: top hammer rock drilling tools, DTH drilling tools, roller cone drilling tools, raise drilling tools, mechanical cutting drilling tools, and geological exploration drilling tools. However, rock drilling tools are subjected to high-peak and high-frequency impact loads during drilling. Therefore, rock drilling tools are one of the metal material tools with the harshest working conditions and the shortest service life.

If you want to prolong the service life of rock drilling tools reasonably, the stability and reliability of product quality, the selection of suitable rock drilling tools, and other factors are very important, but the fundamental thing is to choose high-quality rock drilling tools, which is inseparable from high-quality manufacturers. To produce high-quality rock drilling tools, first of all, in the selection of raw materials, manufacturers need to select high-quality steel and cemented carbide, and other materials and then need to use advanced production technology and production equipment. Of course, Experienced works in the drilling industry are also very important. This process is generally called the production process, which starts from a series of production technology organization work before the product is put into production until the qualified products are produced in the whole process. What is the specific production process of rock drilling tools?

Preparation before production

Standardized review of drawings of rock drilling tools

The geometric structure, parameter design, material, manufacturing process technology, tooling equipment, and other aspects of rock drilling tools reflect the technical level of the enterprise. Therefore, before producing rock drilling tools, enterprises need to formulate advanced product enterprise standards and quality inspection standards, and to improve the general performance of rock drilling tools, these standards should be produced by international standards as much as possible.

Preparation of main technical documents for rock drilling tools

Before organizing production, it is necessary to prepare product drawings, product enterprise standards, product quality inspection standards, product production process regulations, mold needles, tooling fixtures, and testing and measuring tools specified in the production process. Production can only be organized when the technical documents are complete.

The Production Process of Rock Drilling Tools

Raw materials

The quality performance evaluation of rock drilling tools generally needs to consider wear resistance, corrosion resistance, and fatigue resistance. Therefore, the basic requirements of steel for rock drilling tools are high strength, high toughness, wear resistance, corrosion resistance, and high impact fatigue performance. The raw materials of rock drilling tools we choose generally include steel, cemented carbide for rock drilling, solder, etc.

Hot-working

Hot-working is a processing method that simultaneously produces plastic deformation and recrystallization of metal materials under conditions higher than the recrystallization temperature. Hot-working usually includes casting, forging, welding, heat treatment, and other processes.

Cold working

In metal technology, cold working refers to the process of plastic deformation of metal below the recrystallization temperature, such as cold rolling, cold drawing, cold forging, stamping, cold extrusion, etc. The cold working deformation resistance is large, So it can improve the hardness and strength of the products while forming.

Heat treatment

Heat treatment refers to a metal thermal processing process to obtain the expected structure and properties through heating, heat preservation, and cooling while the material is in a solid-state.

Anticorrosion

Anticorrosion is to take various means to protect metal objects that are easy to corrode and to extend their service life. Usually, chemical anticorrosion, physical anticorrosion, electrochemical anticorrosion, and other methods are used.

Strengthening and other processes

The scientific rigor of the production process of rock drilling tools directly determines its quality. From what we mentioned above about the wide variety of rock drilling tools, it can be seen that rock drill bits and rods are the most common products in daily operations, so let’s expand and share the production process of rock drill bits and drill rods.

The production process of rock drilling bit: raw steel blanking – forging forming – machining – heat treatment – machining – cemented carbide insert.

The production process of rock drilling bit: raw steel blanking – forging forming – machining – heat treatment – machining – cemented carbide insert.

At present, there are two main types of drill rod materials, one is the drill rod material without carburizing treatment, only heat treatment, such as 55SiMnMo, etc.; One is the need for carburizing treatment, the selected material is generally carburizing carbon steel, typical of 27SiMnNi2CrMo(FF710), (18~23)CrNi3Mo, etc. Another is for heave drill rods: hollow bar stock – blanking – machining – carburizing – heat treatment.

Therefore, to meet the market demand, there are some companies specializing in the production of drill bits and drill tools, such as Sandvik, AtlasCopco, etc.

After years of development, the rock drilling tool industry has made great achievements, but the other brands in the market are still far greater than the dominant brands, which has caused these brands to have the same service life as the international ones in terms of the service life of rock drilling tools. There is still a gap between the dominant brands. However, with the growth of people’s demand for rock drilling tools, most companies will inevitably conduct research and innovation on different demand points to continue to meet the market. In addition to the research in the production process of rock drilling tools, rock drilling tool manufacturers need to continuously and timely pay attention to market changes, pay attention to changes in geotechnical construction technology, blasting technology, and rock drilling machinery. The construction plan provides users with competitive and differentiated products. In this process, enterprises must have innovative thinking. Only in this way can they stand out in the fierce market competition.

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