Drilling Steps And Methods To Improve Drilling Accuracy

DALIAN, China - April 7, 2021 - PRLog -- Basic Concept Of Drilling

Under normal circumstances, drilling refers to a processing method in which a drill is used to make holes on the product display.

When drilling the product on the drilling machine, the drill bit should complete the two movements simultaneously.

1.The main movement, that is, the rotary movement of the drill bit around the axis (cutting movement).

2.Secondary movement, that is, the linear movement of the drill toward the workpiece along the axis.

When drilling, because of the flaws in the structure of the drill, it will leave traces on the processed parts of the product and affect the processing quality of the workpiece. The processing accuracy is generally below IT10, and the surface roughness is about Ra12.5μm, which belongs to the rough machining category.

Drilling Operation Process

1. Marking:

Before drilling, first understand the requirements of the drawing. According to the basic requirements of drilling, use tools to draw the center line of the hole position. The center line must be clear and accurate, and the thinner the better. After the line is drawn Use a vernier caliper or steel ruler to measure.

2. Draw Inspection Grid Or Inspection Circle:

After the line is drawn and passed the inspection, an inspection grid or inspection circle with the center line of the hole as the center of symmetry should be drawn as the inspection line during trial drilling to facilitate inspection during drilling And correct the borehole orientation.

3. Proofing And Punching:

Draw out the corresponding check square or check circle, you should carefully proof the punching. Make a small spot first, measure several times in different directions of the center line of the cross to see if the punch is indeed hit at the intersection of the center line of the cross, and then punch the punch to the right, round, and big to make it accurate. Knife centered.

4. Clamping:

Use a rag to clean the machine table, fixture surface, and reference surface of the workpiece, and then clamp the workpiece. The clamping is flat and reliable as required, and it is convenient to query and measure at any time. It is necessary to pay attention to the clamping method of the workpiece to prevent the workpiece from deforming due to the clamping.

4. Trial drilling:

Trial drilling must be done before the formal drilling: the drill bit is aligned with the center of the hole to drill a shallow pit, and then visually check whether the shallow pit is in the correct orientation, and

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