Machining step, the machining process card design

Machining step, the machining process card design

1, the first reference

Precision machining parts and more generally from the reference processing starts again with reference positioning precision machining other surfaces. Therefore, selected as the reference surface of the fine should be arranged in the process of starting the first processing step, in order to provide a reference for subsequent finishing processes. For example, the first shaft hole machining both ends of the center, and then to the center hole of the base as a fine, rough, finishing all outer surfaces. Gear machining the first hole and the reference end face machining, then within the hole and the end as a fine reference, rough and finish tooth surface.
2, after the first crude refined
Fine after a good reference processing, the entire part of the machining process, the first step should be rough, we have a semi-finishing, finishing and finishing. Dongguan Shun Wen Hardware Machinery Factory to remind you: after the first crude refined by the principle of high precision machining first major surface, which is to re-roughing semi-finishing of the main surface, and finally finishing and finishing. Before important surface finishing, and sometimes the need for precision reference trimmed to facilitate important to ensure precision surface, such as when high-precision grinding spindle, before grinding and ultra-fine grinding are required to polishing center hole; precision gear before grinding teeth, but also internal grinding holes.
3, after the first main views
According to parts of the function and technical requirements. The main parts of the first surface and the secondary surfaces are separated, and then processing in the first major surface, then the surface of the secondary processing step inserted therein. Dongguan Shun Wen Hardware Machinery Factory to remind you: Minor surface generally refers to the surface of the keyway, holes, pin holes and the like. These surfaces are generally related to the main surface of a certain relative position requirements, should be the main surface as a reference surface of the secondary processing, so secondary processing surface ships on the main semi-finished surface after finishing the previous one end of the process. There are also placed at the end of the process, but you should be careful not to bruise the main surface has been processed.
4, after the first surface hole
For housing, the base, frame and other parts, the outline of the larger size of the plane, use it as a reference precision machined hole, more stable and reliable, but also easy to process, will help to ensure the accuracy of the hole. Dongguan Shun Wen Hardware Machinery Factory to remind you: If the first hole machining, and then to the hole machining reference plane, is more difficult, processing quality is also affected.