What are the precautions when using percussion bits

What are the types of impact drills

1, drill metal drill for high-speed steel, black drill, can be in alloy steel, non-alloy steel, cast iron and other metal materials drilling, pay attention to the operation of the speed is not too high, so easy to burn the edge of the drill.

2, stone drill is used for concrete materials and stone materials in the use of drilling, the head of hard alloy material.

3, in wood material drilling on the need to use woodworking drill, woodworking drill tool hardness requirements are not high, tool material for high-speed steel. The same drill that drills metal can also drill wood. But because the wood is easy to heat, brittle chips are not easy to come out, so when drilling the need for slow rotation, often to exit to remove brittle chips.

4. If you need to drill on ceramic tile or glass with high hardness, you should use ceramic tile drill. The cutting tool material is tungsten carbon alloy with high hardness.

Precautions for use of percussion bit

1, different materials of drill, used to drill different materials, the more hard and toughness of the tool is worse, the thinner the stiffness of the drill is also worse. So to control the speed of drilling, it is best to add appropriate cooling oil or water when drilling. Now some drill surface plated with hard metal film, used to drill steel, iron, and other materials without heat treatment, easy to stick drill, so before drilling it is best to clean and lubricate the drill with soapy water.

2, before using the drill, it is best to drill a good sample of the material, imitation check drill at the beginning of the deviation, causing inconvenience.

3. Black drill is more suitable for drilling iron on all drill bits. It is also used occasionally in daily life, so it is suggested to reserve one at home.

Impact drill bit maintenance and maintenance

1, after the use of drill, should immediately check whether there is damage, passivation and other adverse conditions should be immediately ground, dressing;

2. When storing, the drill bit should be seated, so that it is convenient to save time and save time to find the drill bit again.

3, when drilling through the hole, when the drill bit is about to drill through the moment, the torque is the largest, so it is necessary to lower the pressure and slow cutting, so as not to break the drill bit due to excessive force;

4. The center point must be played before drilling, so as to avoid the bit slipping away from the center and guide the bit in the correct position;

5, drilling, should make full use of cutting and pay attention to chip removal;

6. When drilling cross holes, drill large diameter holes first and then small diameter holes;

7, when the drill bit drilling, broken or sudden stop phenomenon, may be too fast or cold and hot;

8, drilling so that the center of the drill bit split, may be too small lip clearance Angle, cutting too fast bit passivation, too much pressure, lack of cooling, drill or workpiece clamping bad;

9, drilling bit broken, may be too small drilling lip clearance Angle or drilling speed is too high, feed or drill to passivation and continue to pressure cutting caused by;

10, drilling edge cutting rupture, may be the workpiece material has a hard point sand hole or feed too fast, improper selection of drilling speed, drilling without cutting at the same time;

11, the drilling hole is too large, may be the drill top half Angle is not equal or static point deviation, spindle deviation and other reasons;

12. When drilling, only one chip is discharged, which may be the reason that the two cutting edges are not equal in length or the top half Angle of drilling is not equal.

13, drilling squeak sound, may be not straight drilling or drill passivation and other reasons;

14. Abnormal changes in chip properties during drilling may be caused by cutting edge passivation or breakage.