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In metal drilling, the term "gun drilling " is processed by gun drills. The gun drill is a straight flute drill that can inject cutting fluid into the cutting surface through the hollow body of the drill. Gun drills are adopted for deep drilling with a depth-to-diameter ratio of about 300:1 or higher.
In fact, the component gun barrels is an obvious case, hence the name. Other uses include the manufacture of molds, crankcases, wooden wind instruments and internal combustion engine parts. Gun drills can drill long straight holes in various materials, such as metal, wood, and even certain plastics. Regarding the gun drill mechanism, the coolant in the mechanism can provide lubrication and cooling for the cutting edges, and in addition, it can remove chips from the drilled hole. Compared with steel tips, modern gun drills use carbide tips to extend service life and reduce production and manufacturing costs.
Speaking of the gun drilling, we must first understand the conventional drilling machine. The drilling machine is one of the highly researched and developed machine tool models. Due to its multi-tasking capability and convenient design, it can handle multiple types of hole making and boring tasks at single work station.
Drilling machines evolved from milling machine designs in the early 20th century. Since then, diversified machine models have been widely used for professional and precise purposes in various industries. Drilling machines can be used to describe various CNC drilling machines and include several key accessories designed and assembled on the machine, such as tool magazines, ATC, CMM, multi-axis working tables with different guide movement designs, and many other supporting accessories. These accessories can further improve the performance and accuracy of drilling during processing.
Both drilling based drilling and milling machine and milling and drilling machine are the machine tools whose machining process is controlled by CNC or manual by pushing a spinning tool into one or more work pieces to remove materials like cutting.
Although today's milling and drilling are mainly controlled by CNC programs, manual operation still exist due to the demand for customized processing in the market. Milling and drilling on single machine can meet a variety of machining requirements, and its performance depends on the different tracks installed on the axes, allowing the machining tool to move around the work piece.
The number of axes depends on the needs of customers. There is no absolute optimal number, only the most suitable combination according to user needs. Unlike turning machine, milling and drilling cover a wide variety of operations, and the application is very wide, from single tiny parts to heavy and large gang milling tasks.
Now let us return to the deep hole application. Deep hole drilling machine is one of the highly researched and developed machine tool models. Due to its multi-task processing capabilities and convenient design, deep hole drilling machines can handle multiple types of deep hole making and boring tasks in one stop. Drilling machines evolved from the design of milling machines in the early 20th century. Since then, diversified machine tools such as deep hole drilling have been widely used for professional and precise purposes in various industries, contributing to industrial manufacturing.
In fact, gun drilling can be performed on several machine tools. On lathes, hole depths of less than about 50 diameters are usually feasible. In addition, some special purpose gun drilling machines can drill longer aspect ratios.
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