JPH031136Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to the improvement of a deburring cutter suitable for removing burrs formed on a workpiece by gear cutting, etc. It is.

[Prior art]

Conventionally, there was no suitable tool for removing burrs formed on the end face of the tooth groove of a workpiece during gear cutting or on the end face of the keyway of a workpiece during milling. I was going to work.

[The problem that the idea aims to solve]

For this reason, it has been considered to use a deburring cutter to remove the burr, but there was a problem in that cutting with the deburring cutter would create new secondary burrs.

Furthermore, when removing burrs formed on the tooth groove end face or key groove end face, there was a problem that the cutter would bite into the workpiece because the tooth groove and key groove were discontinuous.

Therefore, an object of the present invention is to prevent the occurrence of secondary burrs, sufficiently remove the burrs, and prevent the cutter from biting during the deburring process.

[Means to solve the problem]

For this reason, the deburring cutter according to the present invention is
It is characterized by a structure in which the carbide blade, which is the cutting edge of the cutter, scrapes only the burrs formed on the surface of the workpiece without cutting into the workpiece.

Specifically, a cutter attachment reference surface perpendicular to the rotation axis is formed on the peripheral edge of a disc-shaped cutter body, and a plurality of carbide blades are arranged and attached in parallel to this cutter attachment reference surface, for example. This deburring cutter rotates the cutter body around the rotation axis to remove burrs from the workpiece, and the carbide blade has both a rake angle and a relief angle of approximately 0°, and This carbide blade is attached at a predetermined angle with respect to a line connecting the center and outer periphery of the cutter body.

[Effect]

According to the deburring cutter of the present invention having the above configuration, during deburring processing, the rake angle and clearance angle of the carbide blade of the deburring cutter are close to 0°, so the workpiece is hardly cut into, and the carbide blade of the deburring cutter hardly cuts into the workpiece. Since the attachment direction of the blade is inclined at a predetermined angle with respect to the center line of the cutter body, it works to effectively scrape off only the burrs that appear on the workpiece surface.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Fig. 1 is a front view showing a schematic configuration of a deburring cutter according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view taken along the - line in Fig. 2. , FIG. 4 is a cross-sectional view of main parts showing a state in which deburring of a gear-cut workpiece is performed using the deburring cutter according to the present invention;
The figure is a schematic diagram showing the state of burrs generated on the workpiece.

In the figure, a deburring cutter 1 is composed of a cutter body 2 and a carbide blade 4.

The cutter main body 2 has a substantially disk shape, and a holder attachment hole 22 is formed in the center. A convex portion 24 is formed on the peripheral edge of one side of the cutter body 2. Reference numeral 28 is a pin hole into which a positioning pin (not shown) for positioning the cutter main body 2 in a holder (not shown) is fitted.

The protrusion 24 has cutting edge relief grooves 26 formed at three locations on its circumference. Carbide blade 4
For example, a plurality of these are brazed and attached to the top of the convex portion 24 at predetermined intervals.

As shown in FIG. 3, this carbide blade 4 has a rake angle α and a relief angle β of approximately 0°.

Note that the rake angle is the angle between a surface perpendicular to the cutting direction and the rake surface, and the clearance angle is the angle between the flank and a surface parallel to the cutting direction.

Therefore, because these rake angles and clearance angles are extremely small, for example, while the carbide blade 4 is pressed in the direction of arrow A toward the workpiece (not shown) in FIG.
When rotated in the SB direction, the rake face and flank face have a characteristic that makes it difficult to cut into the workpiece.

Further, the carbide blade 4 has cutting surfaces 42 and 44 for removing burrs, and the cutting surfaces 42 are inclined at a predetermined angle to a line connecting the center O and the outer periphery of the cutter body 2.

This angle can be set as appropriate, but is preferably set in the range of 30° to 45°.

To explain the operation of this embodiment according to the above configuration, the rake angle α and clearance angle β of the carbide blade 4 are as follows.
is formed at approximately 0°, and the cutting surfaces 42 and 44 are inclined with respect to the center line of the cutter body 2, so that the cutting surfaces 42 and 44 of the carbide blade 4 do not dig into the workpiece during deburring, and the surface of the workpiece is It acts to remove only the burrs.

Next, an embodiment will be described in which a deburring cutter according to the present invention is used to deburr a gear-cut workpiece.

As shown in FIG. 5, the tooth groove 51 that has been cut
On the workpiece 50 having a key groove 53, a burr 520 is formed on the end surface 52 of the tooth groove 51 by gear cutting, and a burr 540 is formed on the end surface 54 of the key groove 53 by cutting using a side cutter (milling cutter).

To explain the deburring tool 6 configured to be able to remove these burrs 520 and 540 at the same time, the deburring tool 6 includes a holder 62,
It is composed of a mounting part 64, a deburring cutter 66, and a deburring cutter 68.

The holder 62 has a substantially cylindrical shape, and has a mounting portion 64 at one end for connecting to a rotating shaft (not shown).

The deburring cutter 66 and the deburring cutter 68 have a carbide blade 660 at the other end of the holder 62.
and 680 are attached so that the protruding positions thereof correspond to the external shape of the workpiece.

This deburring cutter 66 is used to remove burrs 520 from the end surface 52 of the tooth groove 51 of the workpiece 50, and is fitted onto the outer periphery of the other end of the holder 62.

Reference numeral 65 is a spring for constantly pressing the deburring cutter 66 against the end surface 52 of the tooth groove 51, and reference numeral 67 is a retaining pin for the deburring cutter 66.

The deburring cutter 68 is for removing burrs 540 from the end face 54 of the keyway 53 of the workpiece 50, and a washer 71 is interposed inside the deburring cutter 66 at the other end of the holder 62 to remove the burr 540 from the end face 54 of the keyway 53 of the work 50.
It is fixed by 9.

Reference numeral 73 is a positioning pin for determining the fixing position of the deburring cutter 68 in correspondence with the position of the keyway 53 of the workpiece 50. Also, code 75
is a reference for positioning the workpiece 50.

According to the deburring tool 6 configured as described above, when the deburring tool 6 is rotated by the drive source, the deburring cutters 66 and 68 attached to the tips of the holder 62 rotate and remove the burrs 520 and 540. take.

At this time, the deburring cutters 66 and 68 cut the end surface 52 of the tooth groove 51 and the end surface 54 of the key groove 53 with a plurality of carbide blades 660 and 680, respectively.
Rotate while guiding.

As a result, even if there are discontinuous portions of the tooth grooves 51 and key grooves 53 on the end surface of the workpiece 50, the carbide blades 660 and 680 function to remove burrs without biting the workpiece 50.

In addition, as mentioned above, the carbide blades 660, 68
The rake angle and clearance angle are approximately 0 degrees, and the cutter body is installed at a predetermined angle with respect to the center line, so it works to effectively scrape off only burrs without creating secondary burrs.

Although the present invention has been described above based on specific embodiments, it is not limited thereto, and various other embodiments that can be implemented by those skilled in the art within the scope of the claims for utility model registration are conceivable. .

For example, in the above embodiment, the cutter body 2
Cutting blade relief grooves 26 were provided at three locations,
This number may be determined as appropriate depending on the number of keyways that the work to be machined has.

Furthermore, the carbide blade 4 may be fixed to the cutter body 2 by other methods, such as bolts, instead of by brazing.

[Effect of idea]

As explained above, the deburring cutter according to the present invention has a structure in which the carbide blade, which is the cutting edge of the cutter, scrapes only the burrs that appear on the workpiece surface without cutting into the workpiece, thereby preventing the generation of secondary burrs. This makes it possible to sufficiently remove burrs and prevent the cutter from biting during the deburring process.

In addition, when machining interrupted parts such as tooth groove end faces and key groove end faces, multiple carbide blades guide the end faces, making it possible to remove burrs without biting into the workpiece. play.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a schematic configuration of a deburring cutter according to the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a sectional view taken along the - line in Fig. 1. , Fig. 4 is a sectional view of the main part showing the state in which a deburring process is being performed on a gear-cut workpiece using the deburring cutter according to the present invention, and Fig. 5 shows the state of burrs formed on the workpiece. FIG. 1... Deburring cutter, 2... Cutter body, 4
...Carbide blade.

Claims (1)

[Scope of utility model registration request] A cutter mounting reference surface perpendicular to the rotation axis is formed on the peripheral edge of the disc-shaped cutter body, and a plurality of carbide blades are arranged and attached in parallel to this cutter mounting reference surface, and the cutter body is rotated. It is a deburring cutter that rotates around the axis to remove burrs formed on a workpiece, and the rake angle and clearance angle of this carbide blade are both approximately 0°, and the carbide blade is A deburring cutter, characterized in that the cutter is attached at a predetermined angle with respect to a line connecting the center and outer periphery of the cutter body.