The application of spinning cutting tools to a fixed workpiece is common in cnc manufacturing processes,
but CNC turning is a machining method that operates in the opposite direction. It is possible to produce a wide variety of cylindrical or oblong parts more efficiently by rotating the blank rather than the tool in this process. Consider the following points
when working with engineers and product teams: CNC machining, also known as computer numerical control (CNC) machining, is a traditional manufacturing method that produces parts by removing material from a solid block, also known as the workpiece or the blank.
To be more precise, the term "CNC machining" can refer to a number different processes, each of which employs a different set of tools and machines to shape and finish the desired piece of metal. Engineers can use CNC milling to remove material from the
surface of a workpiece using rotary cutters and perpendicular motion; CNC drilling, on the other hand, allows them to drill holes and shapes into a blank with precise diameter and length measurements.
The process of CNC turning
A CNC turning operation produces parts by moving a cutting tool along the external surface of a rapidly spinning workpiece in a generalized fashion. It is achieved through this process, which results in
highly axisymmetric parts due to the creation of a helical toolpath. It is known as "boring" when this same cutting action is performed on an object's internal surfaces; turning and boring together form a larger subset of CNC processes known as CNC lathing,
which is composed primarily of turning and boring. cnc turning services are
similar to other CNC manufacturing processes in that manufacturing engineers use digital CAD files to assist in programming the machine, which results in the cutting implements moving in a precise manner. It is possible to create parts from metal, plastic,
and even wood using this process because it has few material limitations. Most CNC turning machines share a common set of components, despite the fact that some minor differences exist between models and manufacturers. The following are the ones that are
most relevant to manufacturing:
The chuck or collet is a piece of equipment used to hold a drill bit or other piece of equipment. With its clamping action, the chuck firmly secures the workpiece in its holder. Cheek chucks are available
with two different jaw styles: hard and soft. When working with smaller blanks, collet is typically used.
The spindle is composed of the following components:The spindle is the rotating axis of the CNC turning machine, and it is controlled by the CAM file, which specifies the appropriate rotational speed.
Cutters and shears are the following: Each of the various cutting tools required for production is stored in a tool turret, which allows the machine to change tools as needed.
As part of the manufacturing process, the workpiece is inserted into the chuck, the spindle begins to rotate, and the cutting tools are applied to the piece's surface in order to shape the part geometry.
In CNC turning, the workpieces used are typically long and cylindrical in shape, but they can also be square or hexagonal depending on the part design. Hex brass ball valves, for example, start out as hexagonal
bars that are then lathed on either side of the nut to create threads for the ball valve to fit into.
There are several important factors to consider when manufacturing parts on CNC lathes.
Contrary to conventional lathe machines, which typically only allow for tooling along two axes (although turning centers will almost certainly have some Y-axis capabilities), CNC turning machines allow for
cutting operations to take place along three, four, or five axes, depending on the machine's capabilities. Here are a few examples of these extra operations:
Using straight or cylindrical turning, you can make uniform cuts into the diameter of the workpiece while also removing a large amount of material from the surface.
A cylindrical shape with smooth decreases in diameter (similar to an hourglass shape) is produced by taper turning.
A shaped tool is used to create narrow cavities in the workpiece during the grooving procedure.
In this technique, straight, angled, or crossed lines are cut into the workpiece to create a serrated pattern, which provides the part with additional gripping power.
It is possible to apply threading to both large and small geometries, and it produces the threads seen on nuts and screws that allow objects to fasten together.
A method of cutting a completed part from the original workpiece is known as parting.
Turning on CNC machines is generally considered to be a good choice for prototyping and small-scale production. But when determining which method of manufacturing a part will be more economical in the long
run, one factor that must be considered is the outer diameter (OD) of the piece. This is due to the fact that CNC turning machines have a maximum outside diameter (OD) for bar-feed capable part production, and any part with an OD greater than the set limit
will have to be chucked individually, increasing both production time and costs.
An additional factor to consider is the CNC equipment itself. Inherently, the shape of many of these is cylindrical, with a limited cutting edge, which limits the types of cuts that can be made to the workpiece.
Moreover, this means that design elements such as internal corners will have a radius, regardless of how fine or small the cutting tool's size is. Creating undercuts (also known as neck grooves or relief grooves) with CNC turning is a simple and effective
method. In cylindrical turned parts, these are very common, and would be extremely time-consuming to manufacture on a CNC milling machine. If specialized cutting tools are required, it is important to remember that these come with their own set of difficulties.
. For example, tools with longer shafts — which are useful for reaching deeper parts of workpiece cavities — increase the risk of vibration, less-accurate cuts, and a poor surface finish because they are less accurate.
Consider CNC milling instead of CNC turning when the situation calls for it
Even though CNC turning is extremely efficient for producing parts with revolved profiles — such as bolts, ball bearings, and washers — it is not ideal for creating pieces that are not axisymmetric in nature.
Combined with CNC turning, CNC milling can be used to create design features such as flat faces that would otherwise be impossible to achieve. CNC milling is commonly used in automotive, aerospace, and furniture manufacturing applications, as well as in
the production of robots and industrial-grade machinery.