JPH05212613A - Device for cutting off weir of castings - Google Patents

Abstract

PURPOSE:To provide a device for cutting off a weir of castings and save the labor of the weir cutting-off operation without requiring to fix again the castings. CONSTITUTION:A rotary board 23 having a rotary shaft 22 orthogonal to a plane on which a rotary cutter 10 is moved is provided along the plane near the plane. Screw holds (fixing means) N for fixing a castings are provided in the surface of the rotary board 23 and a toggle clamp (rotation stopping means) 24 for stopping the rotation of the rotary board 23 at a proper position is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting product weir cutting device suitable for cutting a weir, a riser, etc., which is integrally formed with a thin-walled casting product obtained by casting. Is.

[0002]

2. Description of the Related Art A casting product obtained by casting has a dam provided for injecting the molten metal into a mold, a shrinkage during solidification of the molten metal, and a pressure applied to the molten metal to make the material of the casting product dense. The riser and the like provided for this purpose (hereinafter collectively referred to simply as a weir) are integrally formed with the product portion.

In the case of a thin-walled casting having such a weir formed therein, if the striking of the weir is attempted to excise the weir, the product portion may be thin and the product may be damaged.

Therefore, in many cases, the casting is fixed by a fixing tool such as a vise, and a rotary cutting tool such as a cutting grindstone or a circular saw is advanced along the surface on which the weir is formed to cut off the weir. ..

[0005]

By the way, a thin cast product may be provided with a large number of weirs in order to make the flow of molten metal in the mold uniform and to shorten the time required for casting. ..

In this case, if a large-diameter rotary cutting tool is used, it may be possible to cut off all the weirs while fixing the casting product.

However, even with a large-diameter rotary cutting tool, since it is possible to advance the casting product only from the peripheral surface to the vicinity of the rotary shaft portion, the weir is deeper than the deepest cutting blade portion. In such a case, there was a problem that all the weirs could not be cut off without fixing the cast product again and the work was troublesome.

[0008] Therefore, an object of the present invention is to provide a weir cutting device for a casting product, which does not require re-fixing the casting product and can save labor in the weir cutting work.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a weir cutting device for casting products according to the present invention is provided with a disk-shaped rotary cutting tool having a cutting edge portion at the periphery thereof. The movable cutting tool is movable in a plane along the board surface of the tool, and the rotary cutting tool is advanced toward a predetermined position of the casting product fixed to the fixing means, and the weir formed in the casting product is cut off from the casting product. A weir cutting device for casting products, wherein a rotary disk having a rotary shaft orthogonal to the plane is installed near the flat surface along the flat surface, and the fixing means is installed on the disk surface of the rotary disk. A rotation stopping means for stopping the rotation of the rotating disk at an appropriate position is installed, and the casting product is fixed to the fixing means so that the predetermined position of the casting product is located on the plane, and the rotation of the rotating disk is increased. In accordance with the predetermined position of the casting product It is characterized in that the displaceable in a plane.

[0010]

According to the weir cutting device for cast products according to the present invention,
A rotary disc having a rotary shaft orthogonal to the plane on which the rotary cutting tool moves is installed in the vicinity of that plane along the plane, and fixing means for fixing the casting product is installed on the plate surface of the rotary disc. Since the rotation stopping means for stopping the rotation of the turntable at an appropriate position is installed, the weir formed in the casting product can be displaced on the same plane and cut while the casting product is fixed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a weir cutting device for cast products according to the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are a side view and a front view, partially in cross section, for explaining a weir cutting device for casting products according to the present invention.

In FIGS. 1 and 2, reference numeral 1 indicates a device main body of the weir cutting device, and casters 2 are attached to the four corners of the bottom of the device main body 1 so as to be movable on the floor surface.

A support board 4 is fixed by a pair of frame members 3 and 3 at a substantially central portion of the inside of the apparatus main body 1.

A pair of bearing stands 5 and 5 are attached to the support board 4.

A rotary shaft 6 is rotatably supported by the bearing bases 5 and 5, and a pair of arm members 7 are attached to the rotary shaft 6 so as to face upward.

Bearings 8 and 8 are attached to the upper ends of the arm members 7 and 7, respectively.

A rotary shaft 9 is rotatably supported by the bearings 8, 8, and a disk-shaped cutting grindstone 10 as a rotary cutting tool is attached to one end of the rotary shaft 9 with its peripheral surface oriented vertically. Has been.

The bearing 8 located on the side closer to the cutting wheel 10 has a handle 1 for moving the cutting wheel 10 up and down.
1 is attached.

A cover 12 is welded and fixed to the handle 11 for preventing danger due to high speed rotation of the cutting grindstone 10 and for preventing scattering of cutting powder particles.

With such a construction, the cutting grindstone 10 is vertically movable on its peripheral surface in the vertical direction.

A pulley 13 is attached to the other end of the rotary shaft 9, and the arm member 7 on the pulley 13 side is provided with
A drive motor 14 for rotating the cutting grindstone 10 is attached.

The rotating shaft 15 of the motor 14 has a pulley 16
Is attached, and the pulleys 13 and 16 are V
It is drivingly connected via a belt 17.

As shown in FIG. 2, a fixing portion 20 for fixing the cast product 18 is installed on the support board 4 near the vertical movement locus C of the rotation center of the cutting grindstone 10.

As shown in FIG. 4, the fixed portion 20 includes a fixed base 21 fixed to the support board 4 and a rotary shaft 22 attached to the fixed base 21.
And a turntable 23 that is rotatably supported via

The rotary shaft 22 of the rotary disk 23 is orthogonal to the side surface of the grindstone on which the cutting grindstone 10 moves up and down, and the rotary disk 23 is installed along the vicinity of the plane.

In the vicinity of the turntable 23, a rotation stopping means 24 capable of stopping the rotation of the turntable 23 at an appropriate position.
Is installed.

As shown in FIG. 4A, a screw hole N is formed on the surface of the turntable 23.

The screw hole N is set so that it can be screwed together with the hole n (see FIG. 1) formed in the casting product 18 during casting.

The casting 18 is fixed to the fixing plate 23 by making the screw holes N and the holes n face each other and screwing and fastening the bolts B (see FIG. 1). B constitutes a fixing means for fixing the cast product 18 to the stationary platen 23.

The rotation stopping means 24, as shown in FIG.
The rotary plate 23 includes a holding portion 25 for holding the rotary plate 23 from both sides of the rotary plate 23, a holding arm 26, a link mechanism 27, and an operating unit 28. The holding portion 25 is attached to the side surface of the fixed base 21, as shown in FIG.

The rotation stopping means 24 is adapted to obtain a larger work by increasing the distance to the point of action of force.
This is a so-called booster mechanism, which is also called a toggle clamp. By rotating the operating portion 28, the holding portion 25 and the holding arm 26 are rotated.
And are designed to securely hold the turntable 23.

A bucket 29 for recovering cutting chips is provided below the fixed portion 20.

Next, the operation of the weir cutting device for a cast product having such a structure will be described.

First, the hole 18a of the casting product 18 and the stationary platen 2
The threaded hole N of No. 3 is connected with the bolt B to fix the casting product 18 to the stationary platen 23.

Then, the turntable 23 is rotated to an appropriate position so that the weir 18b formed on the cast product 18 is positioned at a desired position on the plane on which the cutting grindstone 10 moves, and the operating portion 28 of the rotation stopping means 24 is moved. Is rotated to fix the turntable 23.

Next, the operator lowers the handle 11 to bring the cutting edge portion of the cutting grindstone 10 into contact with the weir 18b of the cast product 18. As a result, the weir 18b is cut (see the chain double-dashed line in FIG. 1).

At this time, if the cutting grindstone 10 cannot be further lowered and the weir is left, the cutting grindstone 10 is once lifted to stop the drive motor 14, and after the rotation of the cutting grindstone 10 is stopped, the rotation stopping means 24. The gripping arm 26 is expanded by rotating the operation unit 28 (see the alternate long and two short dashes line in FIG. 3).

Then, the turntable 23 is rotated to an appropriate position, and the weir that remains uncut can be positioned, for example, higher and the turntable 23 is fixed again.

At this time, since the turntable 23 always positions the weir 18b of the fixed casting product 18 on the plane on which the cutting grindstone 10 moves vertically, on the same moving plane of the cutting grindstone 10 as before. The remaining weir can be cut at.

In this way, the rotary table 23 of the cast product 18 is rotated by rotating the rotary table 23 itself to an appropriate position while keeping the fixed state of the cast product 18 once fixed.
Weir removal can be performed efficiently by eliminating the work of re-fixing to the weir.

In this embodiment, the toggle clamp is used as the rotation stopping means, but a brake mechanism capable of stopping the rotation of the rotating disk may be used.

Further, although the one using a cutting grindstone is adopted as the rotary cutting tool, a circular saw or the like may be used, and the cutting grindstone may be, for example, a rubber grindstone, a resinoid grindstone, a vitrified grindstone, a metal bond grindstone, or the like. The efficiency of the cutting work will be further improved even if the various types are used properly according to the material of the cast product.

Further, although the fixed base 21 fixed to the fixed base 4 is disclosed, for example, a guide rail is laid parallel to the rotary shaft 22 of the rotary base 23, and the fixed base 21 is stopped at an appropriate position of this guide rail. The thickness may be fixed so that the thickness of the casting product can be dealt with.

[0045]

As described above, according to the weir cutting device for a casting product according to the present invention, the turntable having the rotary shaft orthogonal to the plane on which the rotary cutting tool moves is arranged along the plane. Installed in the vicinity of the flat surface, fixed means for fixing the casting product on the surface of the turntable, and rotation stop means for stopping the rotation of the turntable at an appropriate position. It is possible to displace and cut the weir formed on the casting product while being fixed.
Therefore, even if the weir cannot be cut at one time, it is not necessary to re-fix the cast product each time, and the weir cutting operation can be labor-saving.

[Brief description of drawings]

FIG. 1 is a side sectional view of a weir cutting device for a casting product according to an embodiment of the present invention.

FIG. 2 is a front cross-sectional view of a weir cutting device for cast products according to an embodiment of the present invention.

FIG. 3 is a plan view of rotation stopping means of the weir cutting device for a casting product according to the embodiment of the present invention.

FIG. 4 is an explanatory view of the fixing means of the weir cutting device for casting products according to the embodiment of the present invention.

[Explanation of symbols]

 18 Cast Products 18b Weir 10 Cutting Wheel (Rotating Cutting Tool) N Screw (Fixing Means) B Bolt (Fixing Means) 23 Rotating Disk 22 Rotating Shaft 24 Toggle Clamp (Rotation Stopping Means)

Claims (1)

[Claims] 1. A disk-shaped rotary cutting tool having a cutting edge portion at its peripheral edge is made movable in a plane along the plate surface of the rotary cutting tool, and is directed toward a predetermined position of a casting product fixed to a fixing means. A weir cutting device for a casting product for advancing the rotary cutting tool to cut a weir formed in the casting product from the casting product, wherein a turntable having a rotation axis orthogonal to the plane is provided on the plane. Installed in the vicinity of the plane along the plane, the fixing means is installed on the surface of the turntable, the rotation stop means for stopping the rotation of the turntable at an appropriate position is installed, and the predetermined position of the casting product is The casting product is fixed to the fixing means so as to be located on the plane, and the predetermined position of the casting product is displaceable within the plane according to the rotation of the turntable. Weir cutting device.