What Factors Will Affect The Processing Of Fried Dough Twists Drills

Fried Dough Twists drill is a NC tool that drills round holes of workpieces through its rotary cutting of relatively fixed axis. It can be clamped on manual, electric hand-held drilling tools or milling machines and other machining centers for use. Fried Dough Twists drills are widely used.
Does the name Fried Dough Twists drill sound particularly interesting? In fact, the reason why this NC tool has such a special name is that its chip holding groove is spiral and very similar to Fried Dough Twists. This NC tool is mainly used to drill round holes of the workpiece through its own fixed axis rotary cutting. Its spiral grooves have different numbers of grooves, the most common of which is 2 grooves. In addition, the materials of the first class of Fried Dough Twists drill bits are high speed tool steel or hard alloy. The standard Fried Dough Twists drill is mainly composed of the shank, neck and working part. Its spiral angle refers to the included angle between the rear edge of the straight line formed by the spiral line at the top of the spiral groove of the drill and the drill axis. Moreover, because the lead of each point on the spiral groove is the same, the spiral angle at different diameters of the drill is not wanted to hear. It is generally said that the spiral angle of the outer diameter is the largest and the spiral angle will be smaller the closer to the center.
The Fried Dough Twists drill will be affected by many factors during processing. First of all, its diameter is directly limited by the hole diameter. When the spiral groove drill core is thinner, the stiffness of the Fried Dough Twists drill bit will be lower. Secondly, the Fried Dough Twists drill is only guided by two ribs, so the axis of the hole is easy to deflect, while the horizontal edge will make centering more difficult, and the axial resistance will increase, so the Fried Dough Twists drill will swing easily. So the error in the shape and position of the drilled hole will be relatively large. Moreover, generally, the front and rear tool faces of Fried Dough Twists drills are curved surfaces, and the front and rear angles of each point along the main cutting edge are different. When the front angle of the transverse edge reaches minus 55 degrees, the cutting conditions will become very poor, and the distribution of cutting speed along the cutting will also be unreasonable. When the cutting speed of the tool tip with low strength reaches the maximum, it will be severely worn, so the accuracy of the processed hole is relatively low.
When using the Fried Dough Twists drill, you need to master some skills to make the processed workpiece more effective. Don't grind the Fried Dough Twists drill bit immediately when you just get it. It will definitely delay you. It is necessary to position the drill bit and grinding wheel before grinding in order to prepare for the next step. Then, start grinding slowly along the entire back cutting surface from the edge of the drill bit, and make gentle contact with the grinding wheel when in contact, otherwise it is easy to dull the edge and prevent cutting.