Tungsten carbide center drill is used for machining center hole on the end face of shaft and other parts. It is used for the prefabrication of hole processing to guide the hole machining and reduce the error. The center drill is light and defecate.

More and more processing workshops are replacing gun drilling with solid carbide bits. Some solid carbide drill manufacturers think, this kind of bit performance advantage for those who are on his lathe with gun drill deep hole processing, or the deep hole processing tasks subcontract processing workshops of gun drill manufacturers have more and more attractive. However, compared with the tungsten carbide center drill, which is usually made of hard alloy or hardened high speed steel drill point, hardened steel shank and straight slot, there are some limitations in the overall hard alloy deep hole drill. For example, their borehole depth limit (dimensioning) is 40 times the aperture, while a gun drill can easily drill a deep hole with a depth of 50 times the aperture.

There are two types of tungsten carbide center drill: type A: center drill with no cone, type B: center drill with A cone, and A center hole with A diameter of 1~10mm, usually with A center drill without A cone (type A); In order to avoid the damage of the 60-degree centering cone, the center drill with the cone is generally adopted.

Tungsten carbide center hole is the positioning base of the shaft type workpiece mounted on the top. Center hole of 60 degrees taper hole to match the top 60 degrees on the cone; A small round hole in the inner side to ensure that the conical hole is matched with the top cone, and a small amount of lubricating oil (butter) can be stored. The central holes are commonly found in type A and type B. Type A center hole only 60 degrees taper hole. Type B center hole outside the 120 degrees cone cone is also called the protection, to protect the 60 degrees taper hole edge is not being damaged. Type A and type B center holes are machined on lathe or special machine tool respectively with corresponding center. Before machining center hole, the end face of the shaft should be leveled to prevent the center from breaking. The peak Angle of the standard center drill is generally 118 degrees.

Instructions for use of alloy center drill

1. The user must choose the model of the center drill according to the holes of the processed parts and the size of the straight hole.

2. The hardness of the workpiece is best between 170-200hb.

3. Before using the tool, it must be cleaned and anti-rust grease, so as to prevent the cutting chip from sticking to the blade and affecting the performance.

4. The surface of the machined workpiece should be flat, and there should be no sand or hard points, so as to avoid the cutting of the tool.

5. The center drill before drilling should reach the desired position accuracy.

6. Cutting amount

7. Cutting fluid: select different cutting fluid according to the processing object, and the cooling should be sufficient.

8. Matters needing attention: the abnormal situation should be stopped immediately during processing, and the cause can be processed after checking the cause; Pay attention to the abrasion of the cutting edge; After using the tool, clean the oil and keep it properly.

Related link:

http://www.wococarbide.com/Library/index.html

Posted by: hannahgwendolyn at 09:35 AM | No Comments | Add Comment
Post contains 576 words, total size 11 kb.