CAD/CAM applications in high speed machining (2)
2. Effects of Trimming Most of the CAD system's parts are “patched together†by the cut surface, like the top is stitched from multiple pieces of complex fabric. The boundary accuracy of these surfaces directly affects the quality of the resulting tool path. For example, the top of a round table is a complete circle, the top cover is hexagonal, and the hexagonal plane may exceed the circular range at some places on the top. If the range is too large, the tool path will be sharp. In this case, the machined surface is likely to have a knife mark.
3. Impact of incomplete models Many CAD users tend to take shortcuts in order to shorten the modeling time of the model. The trick they often use is to ignore the round chamfer at the inner corner of the base and even think that it can be processed directly with a tool of the right radius. In fact, if you use this method, the tool must be cut into sharp corners, which increases the load of the tool by 4.5 times when the tool is cut in a straight line.
Some CAM systems can provide a solution, but it is best to avoid this phenomenon and ensure that the CAD model accurately represents the shape that needs to be machined. It is best to use a tool with a small radius for machining such round chamfers. In general, the radius of the tool is 30% or less of the geometry of the round chamfer, which makes the cutting tool path at the corner smoother and avoids the tool. Suddenly turned. If you use a small tool, the tool load can be reduced by 3 times compared to the direct cut corner.
4. Influence of inability to machine features Although high-speed machining expands the range of features that can be directly milled, for models with particularly complex shapes, EDM must be used to machine subtle parts. In addition, most parts have many holes that can be drilled directly. If the CAD model used for machining contains these features, most CAM systems will attempt to process. The most typical result is that the tool path contains areas that are not desired for milling. If left untreated, the tool must cut into holes or sharp corners during actual machining. CAM users need to spend a lot of time correcting errors to avoid repetitive machining of EDM areas and hole areas. If possible, remove features that are not desired for milling from the CAD model used to generate the tool path. The exact method depends on the CAD system used, some systems use the method of deleting features, and some are covered by adding additional surfaces.
Second, the impact of CAM on high-speed machining
Although many research institutes have been studying high-speed machining for many years, there is still no clear definition and explanation. The basic starting point for high-speed machining is cutting at high speed and low load and cutting material faster than cutting at low speed and high load. Low-load cutting means less cutting forces and less vibration and deformation during the cutting process. High-hardness materials can be cut by selecting the right tool at high speed. High-speed cutting can remove most of the cutting heat by means of chips to reduce the thermal deformation of the part.
The above advantages can only be achieved under suitable processing conditions. If the processing conditions are not appropriate, it will affect the life of the tool and even lead to more serious consequences.
1. High-speed machining tool path The limiting factors of the high-speed milling tool path are ranked as follows:
(1) The tool cannot collide with the part;
(2) The cutting load must be within the ultimate load of the tool;
(3) The residual material cannot be greater than the specified limit;
(4) A sudden change in material removal rate should be avoided;
(5) Cutting speed and acceleration must be within the capabilities of the machine;
Previous page next page
Here you can find the related products in Portable Meter, we are professional manufacturer of Portable Meter,Ph Pen Meter,Ph Pen Tester,Pen Type PH Meter Price. We focused on international export product development, production and sales. We have improved quality control processes of Portable Meter to ensure each export qualified product.
If you want to know more about the products in Portable Meter, please click the product details to view parameters, models, pictures, prices and other information about Portable Meter,Ph Pen Meter,Ph Pen Tester,Pen Type Ph Meter Price.
Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Portable Meter!
Portable Meter,Ph Pen Meter,Ph Pen Tester,Pen Type Ph Meter Price
Xi'an Gavin Electronic Technology Co., Ltd , https://www.gaimcmeaso.com