Blog Grid

February 20, 2019

How to grind the worn bit by hand?

How to grind the worn bit by hand? First of all, we should observe the wear of the two main cutting edges of the drill. If the degree of wear on both sides is different, the wear on one side is slightly higher than that on the other. More attention should be paid to grinding. […]

February 12, 2019

Effect of Grinding Quality of Twist Drill on Machining

The grinding quality of twist drill directly affects its drilling quality. So the grinding of twist drill is very important. There are two kinds of grinding conditions for twist drills: 1) correct grinding and 2) incorrect grinding. The impact of these two conditions on workpiece processing is described below. 1. Correct grinding Drilling condition: When […]

February 1, 2019

How to choose the right geometric Angle of graphite tool?

Choosing the right geometric angle of the graphite tool can help to reduce the vibration of the tool. In turn, the graphite workpiece is not easy to collapse. (1) Land Angle When the negative land angle is used to process graphite, the blade strength is good, the impact resistance and the friction resistance are good. […]

January 24, 2019

Application of coating technology

In the case of constant cutting parameters, in order to improve production efficiency and reduce production costs, the tool coating technology to reduce tool wear, and in order to improve tool durability has become a trend. Tool coating refers to coating a thin layer of refractory metals or non-metallic compounds with good wear resistance on […]

January 17, 2019

Clamping method of workpiece in drilling

In order to ensure the quality and safety of drilling, different clamping methods should be adopted according to different shapes of workpieces and cutting forces. (1) The workpiece with a flat shape can be clamped with a flat-jaw clamp, as shown in Figure (a). (2) For cylindrical workpieces, V-shaped iron can be used for clamping, […]

January 10, 2019

How to select the material of drill bit?

According to the machining characteristics of the material, the drill bit is required to have the following characteristics: the hardness of the drill bit must be greater than the hardness of the workpiece to be processed. Because the bit bears a lot of torsion and axial force when machining the workpiece, it must have enough […]