JPS61209815A - Device for cutting iron board or the like - Google Patents

Abstract

PURPOSE:To hold a cutting machine easily and securely at a desired cutting part by holding said cutting machine on an object to be cut via a magnet chuck base by means of a holding magnet in a ship disjointing cutting unit. CONSTITUTION:A magnet chuck base 24 is placed on an iron board 29, so as to be correspondent with a defined cutting line L while considering a clearance M between the cutter 14 of a cutting machine 1 and the base 24, and an electromagnet 28 is excited to firmly hold the plate 29. Then, the cutter 1 is placed on the magnet chuck base 24 in such a way that one side of its lower part is joined to a positioning rib 26, and an electromagnet 27 is excited to firmly hold the machine 1. After that, a cutter 14 is rotated by means of a hydraulic motor 11 while being lowered by the rotation of a handle 21, to cut the iron board 29, and advances while cutting in the axial direction by the rotation of a handle 9. Thereby, the cutting machine can be set and held with respect to a desired cutting part easily and securely while eliminating the danger of fire, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a cutting device suitable for cutting iron plates, etc., which is mainly used for large tongue force machines.

(Prior Art and its Problems) Traditionally, aging ships such as large tankers have been dismantled to reuse the iron materials that make up the ships, in order to achieve a rational circulation of resources.

In ship dismantling work, especially when cutting steel plates, the cut steel plates are cut into the desired shape and size so that they can be reused as they are, and the cutting method is to use a gas burner. It is done manually.

By the way, regarding oil tanks, refrigerated tanks, etc. installed in LPG tankers, LNG tankers, refrigerated carriers, etc.
Generally, it is formed of double iron plates, inside and outside, with a heat insulating material such as urethane foam interposed between the two iron plates.

Therefore, when an oil tank or the like as described above is cut with a gas burner, there is a fire prevention and safety problem in that the heat insulating material burns and toxic gas is emitted.

(Purpose of the Invention) The present invention cuts an object to be cut, such as a steel plate, with a cutter, makes the cutting machine compact, and makes it easy to install and hold the cutting machine in correspondence with the desired cutting part of the object to be cut. It is an object of the present invention to provide a device for cutting iron plates, etc., which can cut iron plates, etc.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention includes: a flat rectangular parallelepiped-shaped magnetic chuck base that is superimposed on a workpiece to be cut such as a steel plate along a desired cutting line; a hydraulic motor; a cutter driven by the hydraulic motor, and a cutting machine positioned and superposed on the magnetic chuck base; a magnetic chuck base and a cutter are provided at appropriate locations on the magnetic chuck base. The present invention is characterized in that a holding magnet is provided to hold the cutting body, the magnetic chuck base plate, and the cutting machine.

According to the above configuration, the cutting machine is held on the magnetic chuck base by the magnet, and the magnetic chuck base is held on the object to be cut.
The cutter does not shift due to reaction during cutting, and the object to be cut can be cut by the cutter.

As a result, even if the object to be cut is an oil tank of an LPG tanker, an LNG tanker, a refrigerated tank, an oil tank of a refrigerated carrier, etc., which uses flammable heat insulating material, etc., the device of the present invention can cut the object. There is no risk of fire etc.

In addition, since the cut surface is smooth, the cut iron material has high value as a product as it is, so it is economical and extremely rational. Since there is no hardening, problems such as slippage of the planer do not occur during planar processing.

In addition, since a hydraulic motor is used, it is easy to control the rotation speed of the hydraulic motor itself, and the cutter can be rotated at the optimum rotation speed. (The cutter must be rotated at the optimum speed to achieve this.)

Therefore, since the mechanism of the power transmission section connected to the hydraulic motor can be simplified, the entire cutting machine can be made compact.

In general, the magnetic chuck base is arranged so that it is superimposed along the desired cutting line of the object to be cut, and the cutting machine is positioned and superimposed on the magnetic chuck base.
It is possible to easily and reliably install and hold the cutting machine corresponding to the desired cutting part of the object to be cut. Even in this case, there is an effect that the cutting device can be reliably joined to the object to be cut, and the object to be cut can be cut by the cutter.

(Explanation of Examples) An embodiment of the present invention will be described below.

FIG. 1 shows the overall configuration of a cutting device for iron plates, etc., according to the present invention.

In the figure, the cutting machine 1 has substantially rectangular holding plates 3.4 made of iron plates etc. erected at both longitudinal ends of an elongated rectangular bottom plate 2 made of iron plates etc., and these holding plates 3, 4. A back plate 5 such as an iron plate having the same height is erected on one end edge in the width direction of the iron plate 2, with the rack passing between the holding plates 3 and 4, and these bottom plates 2. Holding plate 3.4. It has a case 6 composed of a back plate 5 and a back plate 5.

Inside the case 6, a pair of upper and lower cylindrical X-axis guide rails 7 made of iron or the like are fixed at both ends to the holding plates 3 and 4.
8 are arranged at required intervals.

In the middle of the lower X-axis guide rail 7.8, one end is rotatably supported on the holding plate 4, and the other end is passed through a holding hole drilled in the holding plate 3, and the X-axis feed handle 9 is connected to the holding plate 4. A fixed X-axis feed screw 10 is provided, and this X-axis feed screw 10 meshes with an X-axis feed screw gear (not shown) which will be described later.

A well-known hydraulic motor 1] is used as the power unit of the cutting machine 1, and the power output from the hydraulic motor 1 is transferred to a power transmission built in a gear case 12 made of a steel plate or the like formed into a substantially rectangular parallelepiped shape. Cutter rotation axis 1 via a mechanism (not shown)
3, and is configured to rotate a disc-shaped cutter 14 pivotally attached to a cutter rotating shaft 13.

In this embodiment, the cutter 14 uses a carbide blade made of tungsten carbide, a high speed steel blade made of high speed steel (referred to as high speed steel), or the like.

A pair of left and right cylindrical Y-axis guide rail holding parts 15 and 16, each of which has substantially semicircular end surfaces, is fixed to a required location on the back surface of the gear case 12.
5.16 is formed with a fitting hole penetrating both end faces, and the inner diameter of this fitting hole is designed to be slightly larger than the outer diameter of the Y-axis guide rail, which will be described later.

In addition, an X-axis feed screw gear (not shown) that meshes with an X-axis feed screw, which will be described later, is provided at a required location on the back surface of the gear case 12.

The Y-axis guide rails 1.7.18 made of iron or the like are inserted into the insertion holes formed in the Y-axis guide rail holding parts 15.16, respectively.
is penetrated through the Y-axis guide rails 17 and 18, and the Y-axis guide rails 17 and 18 are fixed to a U-shaped case, which will be described later.

The U-shaped case 19 is formed by bending an iron plate or the like into a square shape, and inside the U-shaped case 19 has two ends fixed to a pair of upper and lower horizontal walls 19a and 19b that constitute the U-shaped case 19. The left and right pair of Y-axis guide rails 17 and 18 are spaced at the required distance (
Y-axis guide rail holding part 15. '16) and both Y-axis guide rails 17.
In the middle of 18, an X-axis feed screw 20 is provided.

One end of the X-axis feed screw 20 is rotatably supported by the horizontal wall 19b, and the other end is passed through a holding hole formed in the horizontal wall 19a, and an X-axis feed handle 21 is fixed thereto.

Roughly speaking, on the back side of the vertical side surface 19C of one U-shaped case, a pair of upper and lower X-axis guide rail holding parts 22 and 23 are arranged at a required interval (an interval corresponding to the interval of 7°8 of the X-axis guide rail). This X-axis guide rail holding part 22.23 is a cylinder whose both end surfaces are formed into a substantially semicircular shape, and whose inner diameter is slightly larger than the outer diameter of the X-axis guide rail 7.8. Large designed insertion holes are formed on both end surfaces; An X-axis guide rail 7.8 passes through each of the insertion holes.

Since the cutting machine 1 is configured as described above, rotating the X-axis feed handle 9 moves the cutter 14 in the X-axis direction (back and forth direction).
By rotating the X-axis feed handle 21, the cutter 14 can be moved in the Y-axis direction (vertical direction).

The magnetic chuck base plate 24 is made of an iron plate or the like, and has a positioning rib 26 integrally formed along the longitudinal direction on one end edge of the upper surface 25a of the elongated rectangular parallelepiped case 25.
2 and 3 at appropriate locations on the lower surface 25b and the lower surface 25b.
As shown in the figure, an electromagnet (permanent magnet may also be used>27.28
are buried respectively. The electromagnets 27 and 28 are configured to be connected to a desired circuit and to be energized and excited.

The apparatus for iron plates, etc. according to the present invention is composed of a cutting machine and a magnetic chuck base plate 24.
Next, the means for cutting a steel plate using the apparatus of the present invention will be explained.

In FIGS. 2 and 3, the magnetic chuck base 24 is placed on two iron plates, and the clearance between the cutter 14 of the cutting machine 1 and the magnetic chuck base corresponds to the predetermined cutting line on the two iron plates. M is taken into consideration, and the electromagnet 28 is excited to firmly hold the magnetic screw 1 to the chuck accumulator 24 on the iron plate 29.

Next, cut the cutting machine 1 on the ÷ Gnet chuck base plate.
The cutter 1 is placed one above the other with its lower side joined to the positioning rib 26, and the electromagnet 27 is energized to firmly hold the cutting machine 1 on the magnetic chuck base 24.

After the cutting machine 1 is installed as described above, the cutter 14 is moved downward to cut the iron plate 29. The cutter 14 is
Since it can be moved back and forth in accordance with the length of the shaft guide rail 7.8, it is possible to cut two iron plates in accordance with the moving distance.

FIG. 4 shows another embodiment of the present invention, and the difference between this embodiment and the previous embodiment is that in this embodiment, cutting @
A non-slip gear rack 30.30 made of iron plate or the like with a negative side edge formed in the shape of a chevron-shaped tooth is fixed to both longitudinal sides of the bottom plate 2 of 1 with bolts 31 or the like with the tooth-shaped part facing downward. . Further, on both sides of the magnetic chuck base plate 24, anti-slip gear racks 32 and 33 (formed in the same way as the anti-slip gear rack 30) are fixed with bolts 33 or the like with the toothed portions facing upward.

Therefore, when placing the cut Ia1 on the magnetic chuck base plate 24, by meshing the toothed portions of the anti-slip gear racks 30 and 31 with each other, the holding force of the cutting machine 1 is increased in addition to the suction force of the electromagnet 27. It can be roughly strengthened.

Furthermore, in order to firmly hold the magnetic chuck base 24 on the iron plate 29, the bottom surface of the magnetic chuck base 24 may be expanded to increase the number of electromagnets 28.

The device of the present invention is particularly suitable for cutting steel plates that constitute ships such as LPG tankers, LNG tankers, and refrigerated carriers, but it can of course also be applied to cutting general steel plates, etc. .

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a cutting device for iron plates, etc. according to the present invention, and FIG. 2 is a sectional view taken along the line ■-■ in FIG. Figure 3 shows
This shows the state in which the cutting device is placed on an iron plate, and FIG. 1 is a sectional view taken along the line ■-■ in FIG. 1, and FIG. 4 is an explanatory view showing another embodiment of the present invention. 1...Cutting machine 11...Hydraulic motor 14...Cutter 24...Magnetic i-chuck base plate 27.28...Electromagnet 29...Iron plate

Claims (1)

[Claims] (1) A flat rectangular parallelepiped magnetic chuck base that is superimposed on a workpiece to be cut such as a steel plate along a desired cutting line; and a hydraulic motor and a cutter driven by the hydraulic motor. a cutting machine that is positioned and superimposed on the magnetic chuck base; the magnetic chuck base and the object to be cut are held at appropriate locations on the magnetic chuck base; and the magnetic chuck base and the cutting machine are held at appropriate locations on the magnetic chuck base. A cutting device for iron plates, etc., characterized by being equipped with a holding magnet.