CNC machining is not only suitable for high-volume parts processing, but also for small-batch and high-precision parts processing. CNC machining has a good degree of flexibility and automation. It is more suitable for processing curved and curved parts with complex contours, many holes and grooves, as well as complex box and prism parts with a large number of holes and grooves. Under the condition of multi-variety and small batch production, CNC machining can obtain higher economic benefits. So how does CNC machine parts?
The processing of CNC machining technology is basically the same as that of ordinary machining, but it has its own characteristics. Therefore, when designing the CNC machining process of parts, it is not only necessary to follow the good flexibility and high automation of CNC machining, but also it is especially suitable for processing curved and curved parts with complex contour shapes, as well as complex boxes and prisms with a large number of holes and slots. Components. Under the condition of multi-variety and small batch production, the use of CNC machine tools can obtain higher economic benefits.
Determination of tool setting point and tool change point in CNC machining center. The tool set point is the starting point for the tool to run relative to the workpiece in CNC machining. Since the program is also executed from this point, the tool set point is also called the program start point or the tool start point. When programming, the choice of tool point position should be considered first
When the machining accuracy is not high, some surfaces on the workpiece or fixture can be directly used as the tool surface; when the machining accuracy is required to be high, the tool set point should be selected based on the design or process of the part as much as possible. For example, for a part positioned by a hole, it is more appropriate to use the axis of the hole as the tool set point.
The tool setting point should have a certain coordinate relationship with the positioning reference of the workpiece to ensure the coordinate relationship of the machine tool. The selection of the tool set point should facilitate the calculation of the coordinate value and the tool setting.
During tool setting, make the tool setting point consistent with the tool position. The so-called tool position, for flat end milling cutters, refers to the intersection of the cutter shaft and the bottom of the cutter; for ball end milling cutters, it refers to the ball center of the ball head part; turning tool refers to the tool tip; for drill bits, it refers to the drill bit; The wire cutting machine refers to the focus of the wire electrode axis and the surface of the part.
Under normal circumstances, when the tool needs to be changed during the CNC machining process, the tool change point should be clearly defined, and the setting of the tool change point position should follow the principle of not damaging the workpiece, fixture and machine tool during tool change. Do not change props blindly, otherwise it will damage the equipment.