Machining process refers to the work that needs to be done by the operator before the machining process is carried out in the process of machining. The operation of the operator in accordance with the relevant normative operation of the machining process will be conducive to reducing the processing errors in the process of machining, resulting in economic losses.
Classification of machining processes
The mechanical processing mainly has the manual processing and the numerical control processing two kinds. Manual machining refers to the process of machining various materials by manual operation of mechanical equipment such as milling machines, lathes, drilling machines and sawing machines by mechanical workers. Manual processing is suitable for small batch, simple parts production. CNC machining (CNC) refers to the use of mechanical workers to machining equipment, such as machining center, turning and milling center, Edm wire cutting equipment, thread cutting machine. CNC machining in a continuous way to process the workpiece, suitable for large quantities, complex shape parts.
Mechanical processing technology requirements
Tolerance requirement
Shape tolerance not noted should meet the requirements of gb1184-80
The tolerance of the unnoted length and dimension is 0.5mm
The casting tolerance zone is symmetrical to the basic dimensional configuration of the blank casting
Requirements for cutting machined parts
The parts shall be inspected and accepted according to the working procedure. Only after the previous working procedure is checked and qualified, can the parts be transferred to the next working procedure.
No burr is allowed on the machined parts.
After finishing the parts should not be placed directly on the ground, should take necessary support, protection measures. Machining surface is not allowed to rust and affect the performance, life or appearance of knock, scratch and other defects.
Rolling finishing surface, rolling should not have peeling phenomenon.
The parts after final process heat treatment, the surface should not have scale. After finishing mating surface, tooth surface should not annealing
The surface of the thread is not allowed to have black leather, bump, random buckle and burr and other defects.
The specific process of mechanical processing mainly includes Lathe, milling, grinding, pliers, drilling, punching, sawing, as well as electroplating, heat treatment, wire cutting, forging and other methods.
Lathe, mainly through turning tool to the rotating workpiece for linear or curved translation movement processing, turning can make the workpiece to achieve the shape, suitable for processing shaft and rotary parts;
Milling: milling machine, mainly through the rotary tool fixed in the workpiece table workpiece processing, suitable for processing plane, groove, various curved surface or gear
Grinding: grinding machine, mainly through high-speed rotation of the grinding wheel of the workpiece plane, cylindrical, hole, tool grinding, processing of the workpiece surface roughness is particularly high;
Pliers: the bench for bench work is used for precision measurement, checking the dimensional accuracy and shape and position error of parts, and for precision marking. It is the basic tool and operation in mechanical manufacturing.
Drilling: drilling the workpiece with a drill or other tools;
Punch: a press that is formed by pressing, such as round or perforating; a punch.
Saw: saw machine, suitable for cutting after cutting.
Above is often used in mechanical processing of several processes, through the above way, can make the workpiece size to a certain extent.
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