JPH10193214A - Diamond end mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform grinding work while being installed in a machining center as it is by forming smooth crests having an inclined or spiral shape on a grinding surface of a grinding part outer periphery, providing relief grooves between the crests, and arranging exhaust ports to jet a cleaning liquid at the bottom of the relief grooves. SOLUTION: Relief grooves 5, 5... are arranged in their slant attitude on an outer peripheral surface of a grinding part 2, and crests are formed between both relief grooves 5 and 5. These crests 6 and 6... and the relief grooves 5, 5... are not parallel to the direction of a shaft 1, and are inclined, or are formed in a spiral shape. At actual grinding time, the tips of the crests 6, 6... contact with a grinding surface of a workpiece, and grinding is performed. Exhaust ports 7, 7... are arranged in the relief grooves 5, and a grinding liquid is jetted from these exhaust ports 7, and flows in between a surface of the grinding part 2 and the grinding surface of the workpiece.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond end mill for efficiently grinding difficult-to-cut materials such as ceramics, titanium, and magnets.

[0002]

2. Description of the Related Art There are various tools (cutters) used for processing a metal material, and these tools are attached to a machine tool to process a metal surface into a predetermined shape. Among these tools, there is an end mill cutter, and a side surface of the material is cut by the end mill cutter and a groove is formed. Then, in order to increase the surface roughness of the processing surface processed by the end mill cutter and improve the dimensional accuracy, grinding is performed later.

[0003] By the way, in the grinding process, a material to be processed is properly mounted on a grinder and a predetermined grinding wheel is used. However, the conventional grinding wheel requires a long grinding time and requires a high workability. Is not good. In addition, the workpiece must be accurately attached to the grinding machine, which is cumbersome, and increases the number of man-hours for the grinding.

[0004]

As described above, the conventional end mill cutter has the above-mentioned problems. Problems to be solved by the present invention are these problems, and there is provided a diamond end mill capable of performing a grinding process without attaching a workpiece to a grinding machine, while attaching the workpiece to a machining center.

[0005]

The diamond end mill of the present invention has a substantially cylindrical grinding portion at the tip of the shaft, and a diamond layer is formed on the outer peripheral grinding surface. A relief groove is provided on the ground surface to release chips generated by grinding, a mountain is formed between the relief grooves, and a grinding fluid outlet is provided on the ground surface. In order to supply the grinding fluid to the grinding fluid outlet, a water conduit is provided and communicated with the grinding portion and the shaft.

Here, the shape of the relief groove is not particularly limited, and is generally formed so as to be inclined or spiral with respect to the axis. As a result, the substantial grinding area with the workpiece accompanying rotation of the end mill is small. And the burden on the ground surface is reduced. That is, it has a shape close to the relief groove of the conventional end mill cutter. The grinding surface is not limited to the cylindrical outer portion, but is also provided at the bottom.

[0007] The ridge serving as an actual grinding portion forms an arc surface, and the bottom also forms an arc surface. By the way, the end mill cutter rotates while ejecting a grinding fluid from an ejection port to grind a predetermined surface or hole. And since it is a kind of end mill cutter, it can be attached to a machining center for processing, and the surface roughly processed using a conventional end mill cutter can be finish-ground by the diamond end mill of the present invention. In this case, the workpiece remains attached to the base of the machining center, and a highly accurate finished surface can be obtained. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0008]

1 (a) and 1 (b) are embodiments showing a diamond end mill of the present invention. As is apparent from FIG.
A diamond layer 3 is formed on the outer peripheral surface of the grinding portion 2 by electrodeposition. The grinding portion 2 is not a perfect cylinder, and the boundary between the tip surface 4 and the outer surface has a suitable size of R.
Forming a surface. Are formed at regular intervals on the outer periphery of the diamond layer 3.

Are formed on the outer peripheral surface of the grinding portion 2 so as to be inclined, and a ridge is formed between the escape grooves 5, 5. As shown in FIG. The ridge 6 has a smooth curved surface provided with escape grooves 5 on both sides, and the ridges 6 are also formed at equal intervals. And these mountains 6, 6
... and the escape grooves 5, 5, ... are not parallel to the direction of the shaft 1, but are inclined. Or it has a spiral shape.

In actual grinding, the tips of the hills 6, 6... Come into contact with the ground surface of the workpiece to be ground.
During the grinding, the heat generated by spraying a grinding liquid such as water is suppressed, and thus the seizure of the diamond end mill and the workpiece is prevented. Also, a large grinding white can be obtained. .. Are provided in the relief groove 5, and the grinding fluid is ejected from these ejection ports 7 and flows between the surface of the grinding portion 3 and the ground surface of the workpiece.

A concave portion 9 is formed in the upper end surface 8 of the cylindrical grinding portion, and a supply port 10 is provided at the bottom of the concave portion. The supply port 10 communicates with the jet port 7. Therefore, the grinding fluid put in the concave portion 9 enters through the supply port 10 and jets out from the jet port 7. Here, the cross-section of the peak 6 has a left-right symmetrical arc surface, but its shape does not matter as long as the gap between the peak 6 and the escape groove 7 is not angular.

FIG. 2 shows another embodiment of the diamond end mill according to the present invention. This end mill has a spherical tip at the bottom (bottom) and is used for grinding the inner surface of a hole. Of course, since the outer surface is the same as that of the end mill of FIG. 1, a flat vertical surface can be ground using the outer surface.

FIG. 3 shows still another embodiment of the present invention. In this embodiment, the length of the grinding unit 2 is reduced, and a shaft 11 is provided with a receiver 11. The receiver 1
Reference numeral 1 denotes a cylindrical shape which is larger than the shaft diameter, is open at the top, and has a housing portion 12. A hole 13 is formed in the shaft 1 in the housing portion, and the hole 13 is connected to a communication hole 14 provided on the shaft center axis.
To the spout formed in the bottom of the relief groove.

Then, the grinding fluid put in the receiving portion 12 of the receiver 11 flows from the hole 13 to the communication hole 14 and is ejected from the ejection ports 7, 7,. As described above, the diamond end mill of the present invention has a substantially cylindrical shape, and forms an inclined or spiral peak on the outer peripheral grinding surface, and a cleaning liquid jet port is provided at the bottom of the relief groove provided between the peaks. The following effects can be obtained.

[0015]

The diamond end mill of the present invention has a slanted or spiral smooth ridge formed on the grinding surface on the outer periphery of the grinding portion, and has a relief groove between the ridges. And, since a jet port for jetting the cleaning liquid is provided at the bottom of the escape groove, a vertical flat surface can be ground by using a conventional end mill, and the inner peripheral surface of the hole can be ground. However, spraying the grinding fluid prevents grinding burn and prolongs the life of the end mill.

On the other hand, by attaching this diamond end mill to the machining center 0, the workpiece can be ground and finished without positioning and setting. Therefore, the work of attaching the workpiece is not required, and the accuracy of the ground surface is extremely high.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a diamond end mill according to the present invention.

FIG. 2 shows another embodiment of the diamond end mill of the present invention.

FIG. 3 is still another embodiment of the diamond end mill of the present invention.

[Explanation of symbols]

 1 Shaft 2 Grinding part 3 Diamond layer 4 Tip surface 5 Escape groove 6 Crest 7 Spout 8 Upper end surface 9 Recess 10 Supply port 11 Receiving unit 12 Storage unit 13 Hole 14 Communication hole

Claims (2)

[Claims] 1. A diamond end mill having a diamond layer with a substantially cylindrical grinding portion at a tip of a shaft, wherein a smooth mountain inclined or spiral is formed on a grinding surface on an outer periphery of the grinding portion, Escape grooves are provided on both sides of the mountain,
A diamond end mill characterized in that an outlet for grinding fluid is provided at the bottom of the relief groove. 2. A diamond end mill having a diamond layer in a substantially cylindrical grinding portion at a tip of a shaft, wherein a smooth mountain inclined or spiral is formed on a grinding surface on an outer periphery of the grinding portion, Escape grooves are provided on both sides of the mountain,
A diamond end mill, characterized in that an outlet for a grinding fluid is provided at the bottom of the relief groove, and the bottom of the grinding portion is a spherical ground surface having a relief groove.