How does CNC machining process parts?
In addition to being appropriate for processing parts in large quantities, CNC machining is also ideal for smaller volumes.
small-batch and high-precision parts processing. CNC machining has good flexibility and automation. It is more suitable for processing curve and surface parts with complex contour shape, many holes and grooves, and complex box and prism parts with a large number of holes and grooves. Under the conditions of multi-variety and small batch production, CNC machining can obtain higher economic benefits. So how does CNC process parts? Next, the editor will introduce it to you.
The CNC machining process largely resembles conventional machining, albeit with its unique attributes. When constructing the CNC machining process for parts, designers must consider CNC machining's excellent flexibility and high automation, as well as its suitability for producing curved and complex contour-shaped surface parts, multi-hole and groove-laden complex boxes and prisms. Manufacturers can achieve greater economic benefits when utilizing CNC machine tools for multi-variety and small batch production.
The determination of the tool setting point and tool changing point of the CNC machining center. The tool set point is the starting point for the tool to move relative to the workpiece in CNC machining. Since the program is also executed from this point, the tool setpoint is also called the program start or tool start. When programming, the choice of tool point position should be considered first
In cases where machining precision is not a critical factor, certain surfaces on the workpiece or fixture can be employed directly as tool surfaces. However, when higher accuracy is required, the selection of the tool setting point should be based on either the design or process of the part. For instance, for parts positioned using holes, it is more advisable to use the hole axis as the eventual tool setpoint.
The tool setting point should have a certain coordinate relationship with the positioning datum of the workpiece to ensure the coordinate relationship of the machine tool. The selection of the tool setting point should facilitate the calculation of coordinate values and tool setting.
To properly set the tool, it is important to ensure that the setting point matches the actual position of the tool. This position is commonly known as the tool position, which can be found at the point where the tool axis intersects with the tool's bottom for flat end milling cutters. For ball end milling cutters, the tool position is located at the center of the ball head part. When dealing with turning tools, the tool position is typically situated at the tip of the tool. As for drill bits, the position can be found at the tip of the drill; while for wire EDM, the focal point of the wire electrode axis and the surface of the part serves as the reference point.
To ensure a smooth and safe CNC machining process, it is important to define the tool change point and follow the principle of not causing any damage to the workpiece, fixture, or machine tool during the tool change. Blindly changing the props can lead to equipment damage, which should be avoided at all costs. Therefore, it is crucial to prioritize the proper setting of the tool change point position before replacing any tool during the machining process.