The machining process known as CNC turning is used to create precise components with cylindrical shapes like shafts and sleeves. This process can also be used to create components with other complex geometries. During this stage of the process, the material is turned by a turning machine while it is being cut by a tool that is controlled by a computer program. In addition, the material is being turned while it is being cut.
When it comes to the production of functional parts for any kind of cnc machining services, the design process is the first step, and one could argue that it is the most important step. When the CAD model is optimized, production times are decreased, costs are decreased, and the quality of the finished products is increased. The computer-aided manufacturing (CAM) program that guides the CNC turning machine through each and every cut is generated with the help of this model. Utilize Bar Stock in a Variety of Forms, Sizes, and Size Combinations
Bar stock is a term that refers to the material that is used in CNC turning before it has been processed or refined. Standard sizes and shapes, as opposed to special diameters and shapes, should be used whenever possible when working with bar stock. This is because standard sizes and shapes are easier to work with. Raw materials are easily accessible in sizes ranging from one millimeter to twenty millimeters, with increments of one millimeter for smaller sizes and up to five millimeters for larger sizes.
If there is a tolerance that needs to be met at the diameter that has the largest measurement, the raw material needs to be at least 0.4 millimeters larger.
Utilize to the fullest extent possible the tools that are provided by default whenever you can. This makes it possible for the production process to make use of tools and gauges that are readily available, as opposed to those that have to be specifically fabricated beforehand. In order to maintain compliance with the standard operating procedures for turning machines, it is strongly recommended that you take a look at this tool guide.
Stay away from any activities that are considered secondary. If you absolutely must engage in secondary processes, you should at least make an effort to carry them out in the smallest quantity possible. It is preferable to have the majority of the part's features, such as internal surfaces and screw threads, concentrated on just one end of the component. This will make the part easier to assemble.
It is important that one end of the component houses as many of the component's features as is physically possible. This is especially important for any internal surfaces or screw threads.
Avoid Leaving Tool Marks
In spite of the fact that it is sometimes impossible to avoid certain insignificant tool marks, it is absolutely necessary to get rid of defects such as scratches and gouges. These characteristics have an effect not only on the way your part looks but also on the mechanical properties it possesses.5 degrees to reduce the risk of defects of this kind occurring.
There is Only One Route That Has Undercuts.
Turning machines typically have tool slides as part of their standard configuration, and these slides rotate in a direction that is orthogonal to the axis of the workpiece. Because it is challenging to create an angular undercut on either the inside or the outside, it is best to steer clear of doing so whenever it is feasible to do so.
When it comes to the component's exterior surface, creating annular grooves is a much more straightforward process than creating internal recesses. When working with internal recesses, you will need tools that are capable of motion in both the axial and transverse directions. If you are able to, when you are designing the parts, you should make it so that they have grooves on the outside of them.
Make room for the tools that are used for cutting the thread.
1. A process known as CNC threading is used to cut threads into the surface of parts
2. It is essential to ensure that the termination of external threads is not situated in an area that is too close to a shoulder or a larger diameter
3. When the diameter of the workpiece is less than the diameter of the minor thread, the workpiece ought to have a relief area for the threads or an undercut in it
Reduce the necessary amount of deburring that must be done.
If a part that has been machined has a burr, it may have a ridge or a rough edge. Because the process of deburring relies heavily on manual labor, there will be additional costs associated with each individual component. When screw threads intersect other surfaces, there are a few design recommendations that should be kept in mind to avoid the formation of burrs. Please refer to the images below for more information.
Understand Knurls
The process of knurling involves creating patterns on round parts for either functional or esthetic purposes. Knurling can be done for either of these reasons. Because knurling is unable to produce an exact number of teeth, the producer should instead be guided by the following guidelines:An estimation of the total number of teeth, in addition to a general description of the size of the knurl (whether it be coarse, medium, or fine).
Avoid going into areas that have corners that are particularly sharp.
Sharp corners, whether they are on the inside or the outside of a product, can lead to weaknesses or require the costly fabrication of specialized tools. This can be the case regardless of whether the sharp corners are on the inside or the outside.
When a part requires a sharp corner, you should make an effort to design it within certain limits so that it can still fulfill the functional requirements of the part. If you are unable to design it within these limits, the part may not be able to function as intended. To each of these corners, a commercial corner break with dimensions of 0.4 millimeters and a 45-degree angle can be applied. This results in the elimination of the unavoidable radius that would have been produced by a form at this intersection otherwise.
Be Certain That the Design of the Spherical Ends Is AccurateWhen a part that is being turned on a CNC lathe needs to have a spherical end, the best way to design the radius of the spherical end is to make it larger than the radius of the cylindrical portion that is adjacent to it. This is because the radius of the spherical end should be larger than the radius of the cylindrical portion.
Designing for Slots and Flats
If the milling cutters have the same curvature radius, it is possible to produce slots and flats with a concave surface at the end or bottom of the material. Flattening the bottom or end of the object can be accomplished by feeding the cutter in a transverse direction. If the function of the part does not require a flat surface, then it should be okay to produce the part with a concave surface. This will make it simpler to manufacture the component.
Determine the Best Spot to Carve Your Name.
By utilizing milling engraving, indentation markings are able to be produced as a byproduct of the routine operations of a CNC turning machine. This is made possible by the fact that the indentation markings are produced during the milling process.
Take Extreme Caution with the Easily Broken Components.
Your design should, whenever it is possible to do so, minimize the amount of delicate small-diameter work that is not supported by anything. When this is accomplished, the work deflection that is brought on by the cutting tool is reduced. Machining shorter, thicker parts is easier than machining longer, thinner parts because the latter require support from a tailstock or steady-rest. This makes it easier to machine shorter, thicker parts.
Comments (0)