JPH11320251A - Chamfering cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make continuous cutting with simultaneous removal of burrs in the forefront part left unremoved in the first working process without requiring the operator to shift his working position forward and backward relative to a metal plate or to revolve the metal plate by changing the grasp of a chamfering cutter to the opposite side. SOLUTION: A cutter part 2 is installed at the forefront of a shank 1 equipped at the base end with a gripping part 1a and is furnished with an overhang part 21 hanging over to the left and right and an extension part 20 in the central part as stretching downward, and cutting edges 23 continued in hooked shape in the rear view are formed on the left and right side edges of the extension part 20 and the left and right bottom edges of the overhang part 21, and a platform 25 for placing is formed on the undersurface of the extension part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal plate, such as a steel plate, which is cut by a press cutter. The present invention relates to an improvement in a chamfering blade for cutting and removing burrs that are generated in a cross-sectional view by cutting out meat of a plate by a cutting blade.

[0002]

2. Description of the Related Art When manufacturing various machine tools such as a grain dryer, members to be assembled are formed by cutting a metal plate such as a steel plate into a predetermined shape by a press cutter. As shown in FIGS. 1 to 3, the metal plate a is formed so that the meat of the metal plate a is taken out by the cutting blade c on the edge of the cut surface b on the side where the cutting blade c passes. As a result, a burr d protruding in a small shape in a sectional view
Is generated.

The burrs d damage the fingertips of workers who handle the metal plate a punched into a predetermined shape for further processing.
Is to be removed by cutting.

The cut surface b of the metal plate a by the chamfering blade A
The work of cutting and removing the burr d that occurs in the metal plate,
As shown in FIG. 4, the cut surface b on which the burr d to be cut is generated becomes the upper end surface, and the burr d formed on one edge of the cut surface b is Place it on the workbench as it exists on the edge located on the left side,
From this state, the operator holds the chamfering blade A held in the right hand on the tip side of the handle 1 to operate the chamfering blade A so as to be pushed forward. It is done by doing.

[0005] The work of cutting and removing the burr d
As shown in FIG. 4, a metal plate a held in a predetermined state is held, and a handle 1 is placed on the right side of the metal plate a with the right hand of an operator.
Is positioned, and the blade 2 on the tip side of the handle 1 is applied to the edge on the side with the burr d beyond the cut surface b which is the upper end surface of the metal plate a. It is performed by moving the right hand forward along the right side of the metal plate a in this state,
At this time, since it is difficult to correctly apply the blade portion 2 to the front end of the cut surface b serving as the upper end surface of the metal plate a, the blade portion 2 is applied to a position slightly before the front end, and the chamfer blade A is pulled forward to perform the operation, and then the burr d of the front end side w where the chamfer remains is moved to the front end side of the metal plate a by the operator, or the metal plate a is turned back and forth. To 180 degrees, and in that state, the blade portion 2 of the chamfer blade A
Is applied to a position in front of the part w where the burr d is left, and is pulled toward the front, so that the burr d formed on the cut surface b is formed.
Is cut and removed.

[0006]

The operation of cutting off the burr d formed on the cut surface b of the metal plate a using the chamfering blade A is performed in the first operation.
From the remaining portion w of the burr d generated on the front end side, it is necessary to change the position of the worker back and forth or to turn the front and back by turning the metal plate a in order to remove the burr d cleanly, There is a problem that work is troublesome and time-consuming.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems occurring in the conventional means, in which an operator shifts a work position with respect to a metal plate back and forth, or turns a metal plate. The object of the present invention is to provide a new means for continuously cutting and removing burrs on the front end side left in the first working process by holding the chamfering blade A in the opposite hand without being removed. I do.

[0008]

According to the present invention, as a means for achieving the above-mentioned object, a blade portion is provided at a distal end side of a shaft-shaped handle portion 1 having a grip portion 1a at a base end side. 2 and a protruding portion 21 that protrudes left and right in a pair on the blade portion 2.
.21, and an extension portion 20 extending downward at the center portion is provided, and the left and right side edges of the extension portion 20 and the lower edges of the left and right overhang portions 21 and 21 are keyed in rear view. The present invention proposes a chamfering blade characterized in that blade edges 23, 23 continuous with the shape are formed, and a mounting table surface 25 is formed on the lower surface of the extension portion 20.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A chamfering blade according to the present invention has a shaft-shaped handle portion, a grip portion formed at the base end of the handle portion which can be gripped by a palm of one hand, and a handle portion at the distal end of the handle portion. The blades are provided on the left and right sides so as to protrude from the tip of the handle toward the left and right sides, respectively.

[0010] The blade portion is formed by forming a blade body forming the blade portion into a wing plate shape orthogonal to the axis of the handle portion.
Further, in plan view, the left and right ends are gradually curved toward the base end of the handle portion so as to form a bow shape as a whole.

This blade body is formed in a substantially T-shape with a protruding portion projecting left and right and an extending portion extending downward from the central portion when viewed in the axial direction of the handle. The lower surface is formed as a flat surface along the left-right direction, and this lower surface is a bearing surface for keeping the posture of the chamfer blade constant when the chamfer blade is placed at a desired place.

The blade edge formed on the blade body is formed at a portion extending from a lower edge of the protruding portion protruding to the left and right sides to each of left and right side edges of the extending portion.

At this time, the blade edge formed at the lower edge portion of the left and right overhanging portions of the blade edge descends from the upper edge portion of the blade edge formed at the side edge of the extension portion toward the overhang direction. As a result, the blade edge formed at a portion extending from the lower edge of the overhang portion to the side edge of the extension portion is formed so as to form an acute angled key shape in the axial direction of the handle portion.

The blade surface facing the blade edge is formed so as to be inclined rearward from the front side of the blade body, so that the blade edge extends from the lower edge of the rear side of the overhang of the blade body. It is to be formed continuously at a portion extending over the side edge on the rear surface side of the extension portion.

Also, the blade body is formed separately from the handle,
You may make it attach and detachably attach and detach to the front-end | tip part of a handle part.

[0016]

Next, an embodiment will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 5 is a perspective view of a chamfering blade A for embodying the present invention. In FIG. 5, reference numeral 1 denotes a handle, 1a denotes a grip mounted on the base end side thereof, and 2 denotes a tip of the handle 1. It is a blade part mounted on the side.

The handle 1 is formed of a steel material in the shape of a shaft, and a grip 1a made of a synthetic resin material is mounted on the base end side. A screw portion 10 for assembling and attaching the blade portion 2 is formed on the tip side of the handle portion 1.

In this example, the blade portion 2 is formed separately from the handle portion 1, and the blade portion 2 is formed in a shape as shown in FIGS. In the same figure, reference numeral 2a denotes a blade body of the blade portion 2, and a plate member made of a steel material and having a plate thickness of about 5 mm is viewed in the front-rear direction as shown in FIGS.
It is formed by punching and punching in a substantially T-shape, thereby forming an extending portion 20 hanging downward at the center portion and extending portions 21 projecting left and right, respectively. .

The blade body 2a is provided with a through hole 22 at the center of the blade body 2a. The through hole 22 is inserted into the screw portion 10 at the tip of the handle 1 and a nut is inserted. 11
12 to 14, the front and rear wall surfaces are attached to the handle portion 1 in a state of being orthogonal to the axial direction of the handle portion 1 as shown in FIGS.

The left and right overhanging portions 21.2 of the blade body 2a are also provided.
As shown in FIG. 6 and FIG. 12, each of the reference numerals 1 is slightly curved rearward in a plan view, so that the overall shape in a plan view is arcuate.

Reference numeral 23 denotes a blade edge formed on the blade portion 2 and the blade body 2.
The portion a extends from the lower edge on the rear surface side of the left and right overhanging portions 21 to the left and right side edges on the rear surface side of the extension portion 20.

Reference numeral 24 denotes a blade surface formed on the blade body 2a so as to form the blade edge 23, and the overhanging portions 21 of the blade body 2a are formed.
A slope inclined from the upper and lower intermediate portions on the front side to the lower edge of the overhang portion 21, and an inclined surface inclined from the portions near the left and right sides of the front surface of the extension portion 20 toward the left and right side edges on the rear side. At the corner portion where the lower edges of the overhanging portions 21 and the both side edges of the extension portion 20 are connected, an arc-shaped inclined surface synthesized by the two inclined surfaces is formed.

Reference numeral 25 denotes a mounting table formed on the lower surface of the extension 20.

The chamfering blade A thus configured operates as follows. When cutting and removing the burrs d generated on the cut surface b of the metal plate a, the cut surface b of the metal plate a serves as an upper end surface, and the edge on which the burrs d are formed corresponds to the left side edge of the upper end surface. In such a state, it is placed on a work table, and the chamfering blade A is positioned on the right side of the metal plate a.
Projecting to the left side of the metal plate a over the cut surface b of the metal plate a, and protruding to the left edge of the lower edge of the overhang 21 and the blade edge 23 of the extension 20. As shown in FIG. 16, a corner portion where the side edge 23 is continuous with the blade edge 23 is cut surface b.
Abutting on a portion slightly closer to the front than the front end of the left edge on which the burr d is formed, and pulling the right hand toward the front while gripping the handle 1 of the chamfering blade A in that state. Then, the burr d is cut in a facet shape.

As a result, the burr d of the portion w left behind on the front end side of the cut surface b changes the chamfering blade A to the opposite hand,
The protruding part 21 on the right side of the blade part 2 on the tip side of the handle part 1 is projected obliquely to the left beyond the cut surface b of the metal plate a, as shown in FIG.
, The corner portion of the blade edge 23 is applied to the left side edge of the cutting surface b, and the chamfering blade A is pushed forward to cut off.

When the remaining burr d is cut and removed by changing the chamfering blade A to the opposite hand, the chamfering blade A
Is placed on the worktable with the mounting table surface 25 reversed, and is held in a posture where the work can be performed by holding the grip portion 1a. Thus, the operation can be easily performed only with the right hand while the metal plate a is pressed.

[0028]

As described above, the chamfering blade A according to the present invention is provided with a pair of overhanging portions 21 projecting left and right from the central portion on the blade portion 2 provided on the tip side of the handle portion 1. An extending portion 20 extending downward is provided, and a hook-shaped blade edge 23, 23 in rear view is provided between the left and right side edges of the extending portion 20 and the lower edges of the left and right overhanging portions 21, 21. Since it is formed in a pair on the left and right, and the mounting base surface 25 is formed on the lower surface of the extension portion 20, when cutting off the burr d generated at the edge of the cut surface b of the metal plate a The burr d left behind on the tip side of the cut surface b by pulling the chamfering blade A forward can be used to reverse the chamfering blade A without the operator changing the working position back and forth or replacing the front and back of the metal plate a. It can be cut and removed by exchanging it and pushing it forward.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a state before cutting in a step of cutting a metal plate with a cutting blade.

FIG. 2 is an explanatory view at the time of cutting in the same step.

FIG. 3 is an explanatory view showing a state in which burrs are generated on the metal plate cut in the same step.

FIG. 4 is an explanatory diagram of an operation of cutting and removing burrs generated on a cut surface of a metal plate with a chamfering blade.

FIG. 5 is a perspective view of a chamfering blade according to the present invention.

FIG. 6 is a plan view of a blade portion of the upper surface cutting blade.

FIG. 7 is a front view of a blade portion of the upper surface cutting blade.

FIG. 8 is a side view of a blade portion of the upper surface cutting blade.

FIG. 9 is a rear view of the blade portion of the upper surface cutting blade.

FIG. 10 is a bottom view of the blade portion of the upper surface cutting blade.

FIG. 11 is a perspective view of a blade portion of the upper surface cutting blade.

FIG. 12 is a plan view of the upper surface removing blade.

FIG. 13 is a side view of the upper surface cutting blade.

FIG. 14 is a bottom view of the upper surface cutting blade.

FIG. 15 is a front view of the upper surface cutting blade.

FIG. 16 is an explanatory diagram of an operation of cutting and removing burrs generated on a cut surface of a metal plate by the upper surface removing blade.

FIG. 17 is an explanatory diagram of an operation of cutting and removing burrs left by the above operation.

[Explanation of symbols]

A: chamfer blade, a: metal plate, b: cut surface, c: cutting blade,
d ... burr, w ... part, 1 ... handle, 1a ... grip, 10 ...
Screw part, 11 nut, 2 blade part, 2a blade body, 20
Extension part, 21 ... Overhang part, 22 ... Through hole, 23 ... Blade edge, 24
... blade surface, 25 ... table surface.

Claims (1)

[Claims] 1. A blade portion 2 is provided at a distal end side of a shaft-shaped handle portion 1 provided with a grip portion 1a at a base end side, and the blade portion 2 has a pair of projecting portions 21 and 21 projecting to the left and right. And an extension portion 20 extending downward at the center portion.
The left and right side edges and the lower edges of the left and right overhanging portions 21 are formed with blade edges 23 and 23, respectively, which are connected in a hook shape in rear view, and are mounted on the lower surface of the extension portion 20. Table 2 for
5. A chamfering blade, wherein 5 is formed.