JPS601963Y2 - Blade grinding stand for end mills - Google Patents

Description

[Detailed description of the invention] This invention relates to an end mill angular force grinding table, and in particular to an end mill angular force grinding table which has a simple configuration, can easily grind the cutting edge of an end mill without requiring any skill, and can grind accurately. .

Conventionally, a tool grinder has been used to grind the blades of tools such as end mills.

According to this tool grinder, since the grinding angle of the blade can be set freely, the cutting edge of various tools can be ground.

On the other hand, it is difficult to set the angle, and when grinding the end relief angle, end recess angle, end third angle, etc., it has the disadvantage that the settings must be reset each time.

This invention enables the cutting edge of an end mill to be ground not only with a tool grinder but also with a surface grinder or a small milling machine equipped with a grinding wheel, and it does not require any skill. It was devised for the purpose of providing an end mill angular force grinding table that can be easily, accurately, and quickly performed. The axis of the end mill to be held is tilted forward by the end clearance angle with respect to the bottom surface of the base, and the holder is tilted to the left by the end clearance angle. The holder is arranged so as to be inclined with respect to the base, and the holder is arranged so as to be rotatable in the circumferential direction of the shaft of the end mill, and has rotational locking means for intermittent locking at predetermined rotational positions. On the other hand,
The bottom surface of the base is equipped with an end relief angle at an angle that is the angle of the end relief angle subtracted from the angle of the end relief angle to give the end mill an inclination of the third end angle. This consists in making the winter slope continuous.

An embodiment of this invention will be described below based on the drawings.

In the figure, reference numeral 1 denotes a base, which is formed into a thick plate-like rectangular body made of steel or the like.

The lower surface IA of this base 1 has an inclined surface I along one edge thereof.
Form B continuously.

Incidentally, the angle between this inclined surface IB and the lower surface IA is approximately 155
Formed at °.

That is, one end edge of the rectangular body is notched at an angle of about 25° to the lower surface 1A to form the inclined surface IB.

On the upper surface 1C of the base 1 formed in this way, a cylindrical holder 3 for holding an end mill 2, which is an object to be ground, is arranged so as to be rotatable in the axial circumferential direction thereof.

The holder 3 is attached to the upper IC of the base 1 using a mounting flange 4.

That is, the flange 5 is formed on the base end periphery of the holder 3, and a step 6 on which the flange 5 is held is formed on the inner peripheral surface of the mounting flange 4, and the flange 5 is locked with this step 6. It is to be attached to the base 1.

The attachment position of the holder 3 to the base 1 is approximately above the center position of the lower surface of the base 1, and the inclination angle between the vertical line to the lower surface of the base 1 and the center of the holder 3 is such that the inclined surface IB is The angle should be about 5° in the direction in which it was formed.

That is, if the direction in which the inclined surface IB is formed is considered as the front part of the base 1, the base 1 is tilted forward by about 5 degrees.

Next, it is similarly tilted to the left by about 2 degrees when viewed from the front direction.

That is, the holder 3 is tilted diagonally forward to the left at the predetermined angle on the upper surface IC of the base 1 with the lower surface IA as a reference.

This inclined mounting of the holder 3 to the base 1 is performed by forming a fitting hole 7 in the mounting flange 4 so that the holder 3 is erected at the predetermined angle on the upper IC of the base 1. .

The forward inclination angle of about 5° is the setting angle for grinding the end relief angle α of the cutting edge of the end mill 2, and the leftward inclination angle of about 2° is the setting angle for grinding the end clearance angle β, and further,
When the inclined surface IB is in surface contact with the processing table surface A, the axis of the end mill 2 is approximately 3
It is tilted by 0° and becomes the set angle for end third angle γ grinding.

It should be noted that these angles indicate one embodiment of this invention, and it goes without saying that other values may be used depending on the difference in the cutting edge angle of the end mill 2.

In addition, the sloped surface 1B shows an example in which the winter sloped surface 1B with the third end angle is given to the end mill 2 by the slope of the third end angle γ, but other required slopes are applied to each of the other edges. Of course, other inclined surfaces (not shown) may be formed so as to provide the end mill 2 with the following.

A rotation locking means 8 is provided in the fitting hole 7 and the end surface of the holder 3 that comes into contact with the fitting hole 7.

The rotation locking means 8 draws a circle concentric with the center of the holder 3 on the end face of the holder 3, and divides the line segment of this circle, that is, the circumference by 24
While forming substantially hemispherical locking holes 9 at equally divided positions,
An appropriate number of spring housing holes 10 are formed on the surface of the fitting hole 7 at positions corresponding to the locking holes 9, and a coil spring 11 is inserted into the spring housing hole 10, and the coil spring 11 elastically holds the holder 3 at all times. A locking body 12 that is pressed in the direction is provided.

Therefore, this rotation locking means 8 allows the holder 3 to rotate by 15°.
Rotation is stopped intermittently at intervals.

Note that the locking hole 9 of the rotation locking means 8 and the storage hole 10 in which the locking body 12 and the coil spring 11 are stored have their forming surfaces opposite to those in the illustrated example, that is, they are fitting holes. A locking hole 9 may be formed in the holder 7, and a storage hole 10 may be formed in the end surface of the holder 3.

Note that the curved surface near the tip of the holder 3 is knurled to facilitate rotation of the holder 3.

A fixing screw 13 for fixing the end mill 2 to the holder 3 is provided on the periphery of the holder 3.

Further, reference numeral 14 in the figure is a mounting screw for mounting the mounting flange 4 to the base 1.

Since this invention is configured as described above, the cutting edge of the end mill 2, which is the object to be ground, can be re-ground very easily.

That is, the holder 3 is tilted with respect to the base 1 so that the axis of the end mill 2 to be held is tilted forward by the end mill relief angle α with respect to the lower surface IC of the base 1, and tilted to the left by the end clearance angle β. Then, the end mill 2 is fixed to the holder 3 and placed on the processing table surface A of the grinding machine, or on the surface of a magnetic chuck or vice (both not shown) arranged on the processing table surface A. By simply positioning the end mill 2, the end mill 2 is positioned at a required angle with respect to the grinding wheel surface B, and as shown in FIGS. 5 and 6, the cutting edge of the end mill 2, that is, the end clearance angle α and the end clearance angle β At the same time, re-grinding can be done easily and accurately.

The holder 3 is disposed so as to be rotatable in the axial circumferential direction of the end mill 2, and the rotation locking means 8 is formed so as to be intermittently locked at a predetermined rotation position, so that the grinding of each row can be performed easily. This can be done by simply rotating the holder 3, making it extremely simple, and since it is locked at a predetermined rotational position, accurate grinding can be achieved.

In addition, on the lower surface of the base 1, in the inclination direction for giving the end relief angle α, an angle for the end relief angle α was subtracted from the angle of the third end angle γ to give the end mill 2 an inclination for the third end angle γ. Since the third end angle giving slope IB is continuous, by making this end third angle giving winter slope IB in contact with the processing table surface A, etc., the setting of the third end angle γ can be made. It can be done easily, quickly and accurately.

In addition, in order to lock the rotation of the holder 3 at 15° intervals, the holder 3
24 locking holes 9 are provided at equal pitches in the circumferential direction of the shaft, and a locking method 12 is elastically inserted into each of the locking holes 9 to be locked at a corresponding position during rotation. By configuring the rotation locking means 8 by disposing it on the base 1 so as to press it in the direction, two sheets,
Even for various types of end mills such as 3-, 4-, and 6-blade end mills, each blade can always be rotationally guided to the desired grinding position, providing excellent versatility.

That is, after finishing grinding the end relief angle α and the end recess angle for one cutting edge, the rotation is performed by a predetermined amount (for example, 180' rotation for a 2-blade, 120' rotation for a 3-blade, etc.) By repeating the same cutting edge grinding process, it is possible to easily grind the end clearance angle α and the end clearance angle β.

At that time, if it is a 2-blade blade, it will rotate by 912 locking holes, or if it is a 3-blade blade, it will rotate in the direction of 9 locking holes to accurately rotate 180° or 120°. movement becomes possible.

Therefore, even more rapid and accurate grinding can be performed.

As explained above, according to this invention, there are two operations: fixing the end mill to the holder and positioning it below the grinding wheel surface of the grinding machine, and rotating the holder according to the number of blades of the end mill. The cutting edge of an end mill can be re-ground simply, quickly, and accurately by simple operation without requiring any skill, and is an extremely useful device in practice.

[Brief explanation of drawings]

The drawings show one embodiment of this invention, in which Fig. 1 is an overall perspective view, Fig. 2 is a rear view of the same, Fig. 3 is a right side view of the same, and Fig. 4 is a right side view of the same.
The figure is a sectional view taken along the line ■ to ■ in Figure 2, Figures 5 to 7 show the state of use, and Figure 5 is a right side view during simultaneous grinding of the end relief angle and the end recess angle. FIG. 6 is a rear view of the same, FIG. 7 is a right side view during end third angle grinding, and FIG. 8 is an enlarged front view of the cutting edge of the 4-power end mill. α...End clearance angle, β...End clearance angle, γ・
... Third corner of the end, A ... Processing table surface, B ... Grinding wheel surface, 1 ... Base, IA ... Bottom surface, 1B ... Inclined surface, 1C ... Top surface, 2. ... End mill, 3... Holder, 4... Mounting flange, 5... Flange, 6... Step portion, 7... Fitting hole, 8... Rotation locking means, 9 ...
Locking hole, 10... Spring storage hole, 11... Coil spring, 12... Locking method, 13... Fixing screw, 14...
mounting screws.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ A base and a holder disposed on the top surface of the base to hold the end mill that is the object to be ground, and the holder must be The holder is arranged to be inclined with respect to the base so that it is tilted forward by the end relief angle with respect to the underside of the table and to the left by the end clearance angle, and the holder is rotatable in the axial direction of the end mill. At the same time, a rotation locking means is formed so as to lock intermittently at a predetermined rotation position, and on the other hand, on the bottom surface of the base, an end relief angle is provided in a dedicated inclined direction.
An end mill characterized in that a winter slope with a third end angle is continuous at an angle obtained by subtracting an angle for the end clearance angle from the angle of the third end angle to give the end mill an inclination for the third end angle. Angular force grinding table. 2. The rotation locking means is provided with 24 locking holes equally spaced in the axial direction of the holder in order to lock the rotation of the holder at 15° intervals, and each of the locking holes has a rotation locking hole in each of the locking holes. Claim 1 of the Utility Model Registration Claim in which the locking method of locking the locking device at the corresponding position is provided on the base so as to be elastically pressed in the direction of the locking hole using a coil spring. End mill angle force grinding table.