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What is the difference between punching and drilling in metal processing?
Punching refers to punching a variety of graphics on steel plates, leather, cloth, wood boards and other materials to meet different needs, specifically: figure-eight holes, hexagonal holes, punched plates, long holes, square holes, round holes, punched plate mesh, triangle holes and so on.
Type of punched plate:
Stainless steel plate, copper plate, iron plate, aluminum plate, low carbon steel plate, galvanized sheet, PVC sheet, cold-rolled coil, hot-rolled plate, copper plate, etc
The traditional method of punching is to use a stamping die to machine through-holes on flat plates.
Drilling: Using a drill bit to process holes in solid materials is called drilling. The hole processing of various parts, except for some of which are completed by turning, boring, milling and other machine tools, a large part is completed by fitters using drilling machines and drilling tools (drills, reaming drills, reamers, etc.). When drilling on a drilling machine, in general, the drill bit should complete two movements at the same time; main motion, i.e. the rotational motion of the drill bit around the axis (cutting motion); Auxiliary movement, that is, the linear movement of the drill bit along the axis direction to the workpiece (feed movement), drilling, mainly due to the shortcomings of the drill bit structure, affecting the processing quality, the processing accuracy is generally below IT10 level, the surface roughness is about Ra12.5μm, which is rough machining.
Operating features:
1. The drill bit speed is high.
2. Serious friction, difficult heat dissipation, more heat, high cutting temperature.
3. Large cutting amount, difficult chip removal, easy to produce vibration.
4. The rigidity and accuracy of the drill bit are poor, so the drilling processing accuracy is low, the general dimensional accuracy is IT11~IT10, and the roughness is Ra100~25.
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