What are the tools for metal hole drilling?

In the field of machining, punching is definitely a technical job. Of course, it is necessary to select the processing tool according to the requirements of processing this hole, and the development of hole processing tools has been said to be more and more detailed, including the special tools for hydraulic cylinders is also subdivided into a category. For these holes processing tools, let’s do a small special analysis one by one to see what their characteristics are?

A drill bit. This is the most common in the field of hole processing, especially the hole diameter less than 50mm, it is a process hole drilled from the solid, the common drill bit is twisting drill, diamond drill, U drill, gun drill. Among them, the requirements of gun drilling are the highest, and the ratio of length to diameter is generally greater than 5 times that of holes, for deep hole drilling, under the premise of ensuring the quality of deep hole processing and the life of deep hole drilling, properly solve the problems of chip breaking and chip removal, cooling and lubrication and guidance.

Reaming drilling. For some precision holes that require accuracy to reach IT5-IT6 and surface roughness value Ra1.6-0.8μm, reaming is a processing method that is easy to operate, has high production efficiency and is very easy to obtain high-quality inner holes, and is also widely used in the field of machining, but the hole diameter is generally not too large.

Countersink drill. In terms of annotation pronunciation, this processing method is indeed less contacted, but it is used more in cylindrical countersunk holes, taper holes and end countersink profile holes.

Hole processing composite tool. It is a new tool composed of two or more-hole processing tools, which is characterized by high efficiency and more non-standard tools. For example, the scraping head used to machine the hydraulic cylinder body belongs to this kind of tool, which combines rough boring tools, fine boring tools and rolling tools, and adopts a modular combination to greatly improve the processing efficiency. Of course, in addition, we commonly see innovative non-standard tools such as step drills and drilling-hinge compounds.

Boring cutter. For machining inner holes with a hole diameter greater than 60mm, the boring method is often used. I won’t list the simple boring processes in detail. For large hydraulic cylinders, the boring cutter can be single-edged, double-edged or floating, depending on the specific situation and efficiency. Most of the time, our customers will choose the relatively high efficiency of the three-group or four-group scraping and rolling boring tool, which is also known as a special tool for cylinders in the industry. The machining accuracy can reach IT8-IT9, and the surface roughness value can reach Ra0.4-Ra0.2μm. The factory needs to be equipped with a dedicated scraping and tumbling machine.

There are many more hole machining tools, and with the improvement of machining technology, more innovative hole machining tools will be designed with the improvement of the process. All in all, in order to correctly choose a suitable drilling tool, it is necessary to choose the right machining tool according to the specific requirements of the hole to be machined.

Zhuzhou Cowee Cutting Tools Co., Ltd. is a professional manufacturer and supplier of metalworking tools. The company provides high-performance standard products and special customized products, which can fully meet the various application requirements of global customers in industries such as metal processing, aerospace, and mold.