How to grind the drill flower to be easy to use and durable? What are the requirements for the drill

Grinding and drilling flower durability method:

There are several points that need to be paid attention to in the sharpening of twist drills, first of all, to ensure that the correct rear angle is grinded, the length and angle of the two main cutting edges should be symmetrical, there is a mantra: the drill edge is flat and the wheel is leaning, and the drill shaft is oblique to the left of the front angle. Grind the back angle from the blade to the back, and swing the tail up and down.

If necessary, the transverse edge can be resharpened, the wiper blade can be sharpened and the chip groove can be opened, and the cooling should be carried out during the grinding process to avoid the annealing of the cutting edge.

Requirements for drill angle:

1) Entering angle and end face inclination.

The entering angle of the selected point on the main cutting edge of the twist drill is the angle between the projection of the main cutting edge on the base of the point and the direction of the drilling feed. Due to the different base surfaces of each point on the main cutting edge of the twist drill, the entering angle of each point also changes. After the twist drill grinds out the top angle 2, the entering angle of each point is also determined, and the relationship between them is.

tan=tan cos (2-2).

– The face inclination of the selected point, which is the angle between the projection of the main cutting edge in the end face and the base face of the point.

Since the absolute value of the inclination angle of each point on the cutting edge gradually increases from the outer edge of the drill core, the entering angle of each point on the cutting edge is also large at the outer edge and small at the drill core.

2) Rake angle.

The angle between rake face and base face in an orthogonal plane. The relationship between the rake angle of any selected point on the main cutting edge and the helix angle, entering angle, and inclination angle of the point is tan=tan sin+tancos formula (2-3).

As the helix angle gradually decreases from the outer radial to the drill core, the blade inclination angle also gradually decreases (the negative value increases), and when the entering angle is constant, the rake angle becomes smaller, from about +30° to -30°, and the cutting conditions near the center of the drill bit are very poor.

3) Back corners.

The relief angle of any point on the cutting edge is the angle between the cutting plane of that point and the flank face. The drill bit trailing angle is not measured within the main profile, but within the assumed work plane (feed profile). In the drilling process, it is this relief angle that actually works, and it is also easy to measure.

The back angle of the drill bit is sharpened, and attention should be paid to grinding it to be smaller at the outer edge (about 8° 10°) and larger at the near core (about 20° 30°). The reason for this sharpening is that the relief angle can be adapted to the change of the rake angle of the main cutting edge, so that the wedge angle of each point is roughly equal, so as to achieve a relative balance of its sharpness, strength and durability, and can make up for the impact of the reduction of the actual working rear angle of each point on the cutting edge due to the axial feed movement of the drill bit, and can also improve the working conditions of the cross edge.

The angle of the two cutting edges is the same, the length is the same, the rear angle is adapted to the requirements of the workpiece, and the length of the transverse edge is moderate.

Summary. New drill flowers usually do not need to be ground because they have been machined and sanded to give them a smooth and flat surface that is ready for use. However, in the process of use, the drill may be flawed or deformed due to wear, impact and other reasons, so it is necessary to trim or grind the drill flower to restore its normal use effect.

If you need to grind or trim the drill swa, it is recommended that you find a professional machining or repair organization to ensure the quality and accuracy of the grinding and avoid secondary damage to the drill swa.

New drill flowers usually do not need to be ground because they have already been machined and polished, and the surface is smooth and smooth, and they can be used directly. However, in the process of use, the drill may be flawed or deformed due to wear, impact and other reasons, so it is necessary to trim or grind the drill flower to restore its normal use effect. If you need to grind or trim the drill swath, it is recommended that you find a professional processing or repair organization to ensure the quality and accuracy of the grinding socks to avoid secondary damage to the drill field.

The alloy twist of the processed aluminum alloy is new to hemp.

When processing aluminum alloy twist drilling, when processing aluminum alloy for the first time, it needs to be sharpened to ensure that the sharpness and angle of the cutting edge, as well as the diameter accuracy of the drill bit meet the requirements of machining. However, in the process of use, if the alloy twist drill is worn or dull, it needs to be sharpened in time to restore its cutting performance and accuracy and improve the processing efficiency. For example, for extremely hard aluminum alloy materials, finer grinding wheels and smaller abrasive grains need to be used to sharpen the edge, so as to avoid the material being overheated and welding, which affects the grinding quality and cutting performance.

In addition, in the process of grinding, it is also necessary to pay attention to controlling the grinding pressure, cutting edge angle and other factors to ensure the processing quality and prolong the service life of the alloy twist drilling.

Hello dear, here for you to find out that new diamond flowers usually need to be grinded. Drill is a tool used to machine metal and requires precise grinding to ensure efficient machining performance. New drill patterns usually go through a grinding process that goes through the following steps:

Coarse grinding: Use abrasives such as grinding wheels to coarsely grind new drill flowers in order to remove uneven parts of their surface and form a preliminary shape. Medium Mill:

By using finer abrasives, the drill is moderately ground to obtain a smoother, even-toned surface, which increases its machining efficiency and reduces frictional resistance when drilling. Fine grinding: This is the last step in the drill grind process, by using finer abrasives to grind the drill to make its surface smoother and make it more efficient.

In each of these steps, it is important to ensure that the angle and accuracy of the drill are optimal. If these steps are not performed properly, they can lead to reduced cutting efficiency, shorter service life, or even damage to the workpiece. Therefore, it is very important to properly grind the new drill flower to help ensure the quality and accuracy of the drilled hole.

Drill flower has the following characteristics:

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Dear, you have a good new drill flower to grind, the reasons are as follows: Kiss the new drill flower before use needs to be ground by the free chain to ensure the finish and accuracy of its surface, and improve the quality and processing efficiency of the drill flower. New drill flowers need to be ground in the following two ways:

1. Grinding in the machine tool: The new drill is loaded into the machine tool, and the grinding process is carried out through the grinding device that comes with the machine tool, which can ensure the diameter accuracy and surface finish of the drill show. 2. Hand grinding:

Grinding the new drill with a hand grinding tool can further improve the accuracy and finish of the drill show, which is suitable for high-precision machining and special machining requirements.