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Author: MULAN -Plastic Molding Manufacturer
Classification of parts in the machining of large CNC machining centers! Large CNC machining centers have complex machining, many processes, high requirements, require various types of general machine tools and many tool holders, and require multiple clamping and adjustments before they can be completed. Processing requires a combination of many parts, so this article will focus on introducing the classification of parts in the processing of large CNC machining centers for us, hoping to help us. The main objects of its processing are five categories of box parts, complex curved surfaces, special-shaped parts, plate-type parts and special processing. Box-type parts generally refer to parts with more than one hole system, a cavity inside, and a certain proportion in the length, width, and height directions.
Such parts are widely used in machine tools, automobiles, aircraft manufacturing and other industries. Box parts generally require multi-station hole system and surface processing, and the tolerance requirements are relatively high, especially the shape and position tolerance requirements are relatively strict. Generally, they need to be milled, drilled, expanded, bored, reamed, countersinked, and tapped. Such processes require a large number of cutting tools. It is difficult to process on general machine tools. The number of tooling sets is large, the cost is high, the processing cycle is long, and multiple clamping and alignment are required. The number of manual measurements is large, and the cutting tools must be replaced frequently during processing. The process is difficult. drawn up, more importantly, the accuracy is difficult to ensure. For CNC machining centers that process box-type parts, when there are many processing stations and the parts need to be rotated many times to complete the parts, horizontal boring and milling machining centers are generally selected.
When there are fewer processing stations and the span is not large, a vertical machining center can be selected to process from one end. Complex surfaces occupy a particularly important position in the machinery manufacturing industry, especially in the aerospace industry. It is difficult or even impossible to achieve complex curved surfaces with ordinary machining methods.
In our country, the traditional method is to use precision casting, and it is conceivable that its precision is low. Messy curved surface parts such as: various impellers, wind deflectors, spherical surfaces, various curved surface forming molds, propellers and propellers of underwater aircraft, and free curved surfaces of other shapes. These parts can be processed by machining centers.
The typical ones are as follows: As the fundamental element of mechanical information storage and transmission, it is widely used in various automatic machines. Such parts include disc cams with various curves, cylindrical cams, conical cams, and barrel cams. , End face cam, etc. To process such parts, three-axis, four-axis linkage or five-axis linkage machining centers can be selected according to the complexity of the cam. Such parts are commonly found in compressors of aero-engines, expanders of oxygen-generating equipment, single-screw air compressors, etc. For such profiles, machining centers with more than four axes linkage can be used to complete them.
CNC processing of parts such as injection molds, rubber molds, vacuum forming plastic molds, refrigerator foam molds, pressure casting molds, precision casting molds, etc. The machining center is used to process molds. Due to the highly concentrated process, the finishing of key parts such as dynamic molds and static molds basically completes all machining content in one installation, which can reduce the cumulative error of dimensions and reduce the workload of repairs. At the same time, the mold has strong reproducibility and good interchangeability.
Machining leaves less work for the fitter, and where the tool is accessible, it should be done by machining as much as possible. In this way, the workload of the mold fitter mainly lies in polishing. Another problem is that after understanding and mastering the processing procedures of large-scale CNC machining centers, operators can still complete many things, such as some special process manufacturing, such as lettering on metal surfaces, etc. in CNC machining centers. And other process operations are possible, very convenient.