JPH0614965Y2 - Drawing cutter - Google Patents

Description

[Detailed Description of the Invention] (a) Field of industrial use The present invention relates to a chamfering cutter that streamlines chamfering work and prevents machining defects in end face finishing of a synthetic resin plate.

(B) Conventional technology When chamfering a synthetic resin plate, a general-purpose file or cutter knife that is usually on the market was used to separately cut the front and back surfaces of the end of the plate separately.

(C) Problems to be solved by the invention The conventional chamfering process of a synthetic resin plate-shaped body with a general-purpose file or a cutter knife is inefficient because the end face of the plate-shaped body is chamfered for each edge. At the same time, it was easy to cause uneven finishing due to insufficient cutting or excessive cutting. And
There is a risk of scratching the plate with the edge of a file or a cutter knife, and if it is scratched, it will take time to correct it and sometimes the product will be scrapped, resulting in waste of production. There was such a problem.

D. Means for solving the problems The present invention enables simultaneous chamfering and finishing of both edges of the plate-shaped body end face in view of the problems in the conventional chamfering of the synthetic resin plate-shaped body described above. It prevents machining defects due to scratches, etc., and its structure is to attach a blade body with a V-shaped cutting edge to the tip of the handle.
The blade body is provided with a protective member that guards both exposed tips of the blade tip.

The protective member may be a spherical body made of synthetic resin, for example, by extending the tip of the grip handle from both outer sides of the V-shaped cutting edge to both tip extension parts, or to both exposed tips of the V-shaped cutting edge. Is formed by covering.

E action By gripping the grip handle, the V-shaped cut edge is brought into contact with both edges of the end face of the plate made of synthetic resin, and the chamfering cutter is advanced linearly while keeping the chamfer at an appropriate angle. The cutting edge cut into both chamfers both edges simultaneously and uniformly. Even if the blade edge of the chamfering cutter is accidentally applied to the plate-like object during the work, both exposed tips of the blade edge are guarded by the tip extension portion of the handle or a protective member such as a synthetic resin spherical body. , Does not damage the surface of the plate.

D. Embodiment An embodiment of the chamfering cutter according to the present invention will be described with reference to the drawings.

In FIGS. 1 (a) and (b), reference numeral 1 is a grip handle made of acetal resin, and a blade body is inserted into the grip handle 1 from the center of an extended portion 1a whose tip is extended to the rear end thereof. A fitting hole 2 is formed so as to extend therethrough. Then, as shown in FIG. 1 (b), the extension portion 1 is attached to one end A of the extension portion 1 a of the grip handle 1.
An elongated U-shaped portion 3 is formed by cutting out from the center of a in parallel with the vertical axis of the handle 1. Further, a V-shaped portion 4 is formed at the other end B of the extending portion 1a of the grip handle 1, and an inclined surface 5 is provided at the outer end thereof. The U-shaped portion 3 and the V-shaped portion 4 formed on the extended portion 1a of the handle 1 form a protective member that guards both exposed tips of the cutting edge.

Further, a screw hole 6 penetrating the grip handle 1 through the fitting hole 2 is formed in the center of the body of the grip handle 1 in a direction perpendicular to the fitting hole 2.

7 is a cutter body made of high-speed tool steel as a blade body having a diameter of 7 mm, the blade tip 8 is formed in a V shape, and a rake angle 9 of 5.5 degrees is formed at the tip of the blade tip 8. ing. Then, as shown in FIG. 1 (b), a relief portion 10 formed by a curved portion and a slope is provided on the opposite side of the cutting edge 8 having the scooping angle 9.

As shown in FIG. 2, the grip handle 1 and the cutter body 7 formed as described above have the V-shaped portion 4 of the grip handle 1 and the V-shaped portion of the cutting edge 8 aligned with each other, and the grip handle 1 V-shaped part 4 and U
The grip body 1 holds the cutter body 7 so that the character-shaped portion 3 extends from both outer side portions of the cutting edge 8 to the extension portions of both exposed tips.
Is fitted in the fitting hole 2 of the grip handle 1, and the set screws 11 and 11 are inserted and screwed into the screw hole 6 at the center of the body of the handle 1 from both sides, and the cutter body 7 is pressed and fixed by the tips of the set screws 11 and 11. .

To remove the cutter body 7 from the grip handle 1, loosen the set screws 11, 11 and push the rear end of the cutter body 7 from the rear end of the screw hole 6 of the grip handle 1 to remove the cutter body 7 from the grip handle 1. Just take it out forward.

Using the chamfering cutter of this embodiment to chamfer the ends of the plate-shaped body made of synthetic resin, as shown in FIG.
Grasp the grip handle 1 and make the scooping angle 9 side of the cutting edge 8 face up, and contact the cutting edge 8 with both edges of the end surface of the plate material P as a plate made of synthetic resin, keeping the chamfering cutter at an appropriate angle to make a straight line. V-shaped cutting edge 8 with a rake angle 9 of 5.5 degrees
Both edges of the plate material P chamfer both edges of the end surface of the plate material P at the same time, and the chips are removed from the handle 1 along the inclined surface 5.

Depending on the shape and size of the plate material P, the grip handle 1 can be held differently and the chamfering cutter can be pulled toward the front for chamfering, and it can also be used for finishing work such as deburring of the end surface of the plate material P. I can.

The cutting edge 8 of the cutter body 7 is guarded by the U-shaped portion 3 and the V-shaped portion 4 at the tip of the grip handle 1, and
Since parts other than the cutting edge 8 are fitted into the grip handle 1, both exposed tips of the cutting edge 8 made of high-speed tool steel and the cutter body 7 directly touch the plate material P made of synthetic resin during the work. It does not damage the surface of P and can prevent processing defects.

Next, another embodiment of the present invention will be described. In FIG. 3, reference numeral 1 is a wooden handle, and the slits 12 are
The grip handle 1 is formed so as to traverse the center of the tip of the handle 1 toward the center of the body.

Reference numeral 7 denotes a cutter body as a thin plate-shaped blade body made of high-speed tool steel, the front portion of which is smoothly bent, the blade edges 8 of which are formed in a V shape, and further, epochins at both ends thereof. Spherical bodies 13, 13 as resin protective members
Are fixed to each other with an adhesive.

The cutter body 7 is fitted in the slit groove 12 of the grip handle 1 and fixed by an adhesive. Depending on the shapes of the handle 1 and the cutter body 7, the adhesive may not be used.

A retaining ring 14 is fitted to the neck portion of the handle 1 to prevent the handle 1 from cracking and to prevent the cutter body 7 from coming off.

Using the chamfering cutter formed as described above, the chamfering work of the end portion of the plate material made of synthetic resin is performed in the same manner as the chamfering cutter of the above-mentioned embodiment.

In this embodiment, acetal resin or hard wood is used as the material of the grip handle, but the material is not limited to this, and a material having a hardness similar to those may be appropriately selected and used.

Furthermore, the material of the spherical body is not limited to the epoxy resin, and any material that does not damage the synthetic resin plate material may be appropriately selected and used.

Further, the shapes, dimensions, angles and the like of the handle, the cutter body and the cutting edge are not limited to these, and may be appropriately changed depending on the material, shape and dimensions of the plate material to be processed.

G. Effect As described above, the chamfering cutter of the present invention has a V-shaped cutting edge, so it is possible to chamfer both edges of a synthetic resin plate-shaped body simultaneously and uniformly. It is an extremely efficient and excellent hand tool for quality assurance.

Further, since the protective members are provided on both exposed tips of the blade tip so that the blade tip does not directly contact the plate-like body, high safety in handling is ensured, and the workpiece is damaged. There is a great contribution to the improvement of operability and productivity such as prevention of processing defects.

[Brief description of drawings]

FIG. 1 (a) is a perspective view of a grip handle and a cutter body of a chamfering cutter showing an embodiment of the present invention, FIG. 1 (b) is a perspective view of the grip handle and a bottom portion of the cutter body, and FIG. 2 is a book. FIG. 3 is an explanatory view showing a chamfering cutter of the present invention and a state in which chamfering work of an end surface of a plate material is performed using the chamfering cutter, and FIG. 3 is a perspective view of a chamfering cutter as another embodiment. 1 ... grip handle 1a ... extension part, 2 ... insertion hole, 3 ...
U-shaped part, 4 ... V-shaped part, 5 ... Inclined surface, 6 ... Screw hole, 7 ... Cutter body, 8 ... Blade edge, 9 ... Scooping angle,
10 ... Clearance angle, 11 ... Set screw, 12 ... Sliding groove, 13 ... Spherical body, 14 ... Stop ring, P ... Plate material

Claims (3)

[Scope of utility model registration request] 1. A chamfer characterized in that a blade body having a V-shaped cutting edge is attached to the tip of a grip handle, and the blade body is provided with a protection member for guarding both exposed tips of the cutting edge. cutter. 2. The chamfering cutter according to claim 1, wherein the tip of the grip handle extends from both outer sides of the V-shaped cutting edge to both the tip extension portions. 3. The chamfering cutter according to claim 1, wherein both exposed tips of the V-shaped cutting edge are covered with a spherical body made of synthetic resin.