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Drill Borehole Deformation Characteristics and Chip Shape
Release time:
2018-06-26
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Deformation law and steering of drilling process. However, the drilling of CNC drill is carried out in a semi-enclosed space, and the transverse edge of the cutting angle is unreasonable, which makes the drilling deformation more complicated. The main points are as follows: 1) The inclination angle of the leading edge of the drill core is negative, especially across the blade area, cutting and scraping are granular and extruded. Almost zero diameter CNC drill bit drill core, cutting speed close to zero, but still feed motion, such a difference in the actual back angle for negative chisel area work, equivalent to the wedge angle βOψ chisel into the workpiece, called wedge extrusion. This is the main reason for the increase of the axial force of the CNC drill bit. No. 2) Before drilling with CNC drill bits
Deformation law and steering of drilling process. Butnc drill bitDrilling is carried out in a semi-enclosed space, and the transverse edge of the cutting angle is unreasonable, which makes the drilling deformation more complicated. There are mainly the following points:
1) The pre-cutting angle of the drill core is negative, especially across the blade area, shavings are granular, and are squeezed. Almost zero diameter CNC drill bit drill core, cutting speed close to zero, but still feed motion, such a difference in the actual back angle for negative chisel area work, equivalent to the wedge angle βOψ chisel into the workpiece, called wedge extrusion. This is the main reason for the increase of the axial force of the CNC drill bit.
2) Before the CNC drill bit is drilled, the angle of the cutting edge and the key point of the edge inclination make the chips deform, curl and flow, and the chip removal is affected by the spiral groove. For cutting plastic materials, the chip volume is a conical spiral. Circuit breakers are more difficult.
3) The CNC drill bit drills the cutting edge without friction between the back angle and the hole wall. However, the plastic material processed by the blade adhesive tape affects the processing quality of the CNC drill.
The cutting force generated by the drilling of the earth includes the tangential force (main cutting force), the backward force (radial force) and the feed force (axial force). When the symmetry of the left and right cutting edges, the backward force deviation finally constitutes the drilling feed force Ff and the cutting torque Mc.
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