Drilling refers to the process of cutting holes into solid materials using drill bits attached to the drilling machine. The process involves pressing the machine onto the material that needs to be drilled and then rotating the drill bit several revolutions per minute. Revolutions can range from a few tens to several thousands per minute. As the process continues, chips are cut off the materials to produce the hole.
There are various factors that determine different characteristics of holes such as depth, shape, and size among others. Characteristics of holes are determined by factors like the rate at which the drill rotates, soil or material nature, drill size, and purpose for which the hole is meant. Types of drilling are also many and diverse. Microdrilling, deep hole, vibration, spot, center, gun, and trepanning drilling are a few of the types in existence today. Deep hole drilling machine makes one of the many machines and tools required in boring operations.
Spot boring is usually part of the preparation process prior to the start of the actual boring. As such, the holes resulting from spot boring are only meant to direct the team during the actual boring operation. The team performing the task is guided by the spot hole as they drill larger holes. Spot holes are usually relatively shallow sometimes extending just a short distance from the surface since their only purpose to guide. Spot holes assist in achieving precision and perfection the actual boring.
Center boring is performed to prepare for further boring activity just like in spot boring. The resultant holes of center boring function as centers of rotation for boring operation that are performed afterwards. This process makes use of a special kind of drill known as a center drill. One should know that there are different tools used for the various kinds of boring operations. The nature of the process is what determines the choice of the tool to be used.
Deep hole boring refers to a special kind of boring activity. In this process, lengths of holes made exceed the diameters at least ten times in measurement. Accomplishing this task needs special tools so as to attain straightness and maintain tolerances. Other considerations kept in mind during the process are surface finish and roundness.
Deep hole boring can be done using a few tooling methods. The most commonly used methods are BTA and gun drilling. These two methods are different from each other because of the way that they remove chip and how coolants enter. Chip removal and coolant entry methods can be classified as internal or external. Straightness tolerance is achieved using various methods like counter rotating workpiece and rotating tool.
Secondary tooling techniques employed include skiving and burnishing, bottle boring, pull boring, and trepanning. Vibration boring is the newest technology that has emerged. This technology uses small controlled axial vibrations of the drill bit to break away chips from the workpiece. Flutes on the drill can then be used to remove the small chips from the holes made.
Acoustic emission, vibrations, torque, and force, all must be controlled. The controlling of these aspects is achieved using high tech monitoring systems. Additionally, special coolants are used to assist with the operation.
There are various factors that determine different characteristics of holes such as depth, shape, and size among others. Characteristics of holes are determined by factors like the rate at which the drill rotates, soil or material nature, drill size, and purpose for which the hole is meant. Types of drilling are also many and diverse. Microdrilling, deep hole, vibration, spot, center, gun, and trepanning drilling are a few of the types in existence today. Deep hole drilling machine makes one of the many machines and tools required in boring operations.
Spot boring is usually part of the preparation process prior to the start of the actual boring. As such, the holes resulting from spot boring are only meant to direct the team during the actual boring operation. The team performing the task is guided by the spot hole as they drill larger holes. Spot holes are usually relatively shallow sometimes extending just a short distance from the surface since their only purpose to guide. Spot holes assist in achieving precision and perfection the actual boring.
Center boring is performed to prepare for further boring activity just like in spot boring. The resultant holes of center boring function as centers of rotation for boring operation that are performed afterwards. This process makes use of a special kind of drill known as a center drill. One should know that there are different tools used for the various kinds of boring operations. The nature of the process is what determines the choice of the tool to be used.
Deep hole boring refers to a special kind of boring activity. In this process, lengths of holes made exceed the diameters at least ten times in measurement. Accomplishing this task needs special tools so as to attain straightness and maintain tolerances. Other considerations kept in mind during the process are surface finish and roundness.
Deep hole boring can be done using a few tooling methods. The most commonly used methods are BTA and gun drilling. These two methods are different from each other because of the way that they remove chip and how coolants enter. Chip removal and coolant entry methods can be classified as internal or external. Straightness tolerance is achieved using various methods like counter rotating workpiece and rotating tool.
Secondary tooling techniques employed include skiving and burnishing, bottle boring, pull boring, and trepanning. Vibration boring is the newest technology that has emerged. This technology uses small controlled axial vibrations of the drill bit to break away chips from the workpiece. Flutes on the drill can then be used to remove the small chips from the holes made.
Acoustic emission, vibrations, torque, and force, all must be controlled. The controlling of these aspects is achieved using high tech monitoring systems. Additionally, special coolants are used to assist with the operation.
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