KR101561692B1

KR101561692B1 - Plasma cutting device for flange

Info

Publication number: KR101561692B1
Application number: KR1020150063422A
Authority: KR
Inventors: 이경우
Original assignee: 이경우
Priority date: 2015-05-06
Filing date: 2015-05-06
Publication date: 2015-10-21

Abstract

The present invention aims to provide a plasma cutting device for a flange which cuts a plurality of flanges at the same time, thus having excellent flange productivity. To achieve this objective of the present invention, the plasma cutting device for a flange which manufactures a ring-shaped flange by cutting a plate-shaped board comprises: a base which supports an entire device; a head which includes a plasma nozzle and performs a cut by spraying plasma onto a plate; a transfer unit installed between a base and the head and transfers the head to a plane; a water tank disposed on a center of the base to support the board, accommodating water inside; a fixing device installed in the water tank, preventing movement of the board seated on an upper end of the water tank; and a control device which controls a moving orbit and an operation of the head by controlling the transfer unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a plasma cutting apparatus,

The present invention relates to a plasma cutting apparatus for a flange, and more particularly, to a plasma cutting apparatus for a flange having high productivity.

When a plate material (steel plate) is used for a specific purpose, a part of the rectangular plate is first cut and then used for the product using the cut material. For example, in the manufacture of a pipe having a flange, a conventional pipe is first prepared, then an annular flange is cut out from the plate, and then welded to the outer surface of the pipe to finally produce a flange pipe.

In this case, most of the annular flanges are manufactured by cutting the plate materials, and most of the flange-shaped cuts in the steel plates are plasma cutting devices.

The plasma cutting apparatus is heated at a high temperature to such an extent that the gas is ionized by the tungsten arc in the plasma torch so that a plasma is generated in a state in which the plasma can act as an electric conductor and the plasma is blown to the workpiece at a certain pressure, Is cut in a predetermined shape.

Various types of plasma cutting apparatuses have been proposed and used. For example, in Japanese Patent Application Laid-Open No. 2004-0104354, an arc current and a plasma gas are supplied to a plasma torch to form a plasma arc from a nozzle of the plasma torch toward a plate material, The control device for controlling the plasma cutting device for cutting the plate material by cutting the plate material by moving at a cutting speed is characterized in that the cutting speed is lowered and the value of the arc current And the plasma gas flow rate or pressure is controlled to be small.

In addition, Japanese Laid-Open Patent Publication No. 1990-0017718 discloses a plasma cutting apparatus comprising a cutting torch for cutting a plasma microwave workpiece, a plasma arc power supply device for supplying a cutting current to the electrode of the cutting torch, A moving means for moving the cutting torch relative to the workpiece; and cutting processing information which is previously stored in the workpiece, wherein the cutting processing information is stored in advance, and based on the cutting processing information, And a drive control means for performing a numerical control of the means. The plasma cutting apparatus is characterized in that it receives information about the movement of the torch outputted from the drive control means to the movement means or the information about the actual movement of the torch in the movement means, Speed detecting means for detecting a relative moving speed of the torch with respect to the workpiece, It is the basis of the signal is a plasma cutting apparatus is disclosed comprising a frequency control means for controlling the frequency of the pulse current from the pulse generator.

In addition, Japanese Laid-Open Patent Application No. 2011-0039748 discloses a support frame; At least a pair of support rollers provided on the support frame and supporting the pipe in contact with the outer circumferential surface of the pipe to be cut while rotating the pipe in the circumferential direction; A vertical support vertically installed on the support frame; A horizontal arm installed horizontally so as to be vertically movable in the vertical support; A torch fixing unit installed at an end of the horizontal arm and fixing the plasma torch; And a purging means for supplying an inert gas into the pipe at one end in the longitudinal direction of the pipe, and a pipe cutting apparatus using the plasma is also used for cutting the pipe as well as the plate.

On the other hand, when cutting an annular flange in a plate, a plurality of annular flanges are cut out from a single plate. In the case of manufacturing a flange using a plasma cutting apparatus, it is common to manufacture the flanges by cutting the flanges one by one. At this time, since the plasma cutting device starts from the side of the plate material and completes the outer shape of the flange, there is a disadvantage that the productivity is lowered because the flange shape and the machined portion of the entrance portion are also included.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a plasma cutting apparatus for a flange which is capable of cutting a plurality of flanges at the same time, thereby achieving excellent flange productivity.

According to an aspect of the present invention, there is provided a plasma cutting apparatus for a flange for manufacturing an annular flange by cutting a plate material in a flat plate shape, the plasma cutting apparatus comprising: A head including a plasma nozzle, the head performing a cutting by spraying a plasma on the plate material; A transfer unit installed between the base and the head for transferring the head to a plane; A water tank disposed in the center of the base for supporting the plate and containing water therein; A fixing device installed in the water tub to prevent movement of a plate material seated on the top of the water tub; And a control device controlling the transporting part to control a movement locus and an operation of the head.

Preferably, when the flange is cut on the plate, the control device cuts a plurality of flanges into the inner diameter portion first, then cuts the outer diameter portion of each flange in half-by-one order, And controls the trajectory of the vehicle.

More preferably, the fixing device is installed on two side surfaces of the water tank.

More preferably, the fixing device is characterized by comprising a stationary portion in the form of a rectangular multi-sided surface, a rotating portion for rotationally connecting the stationary portion and the water tank, a fixing hole formed in the water tank, and a stopper inserted in the fixing hole .

More preferably, the plate member is seated on the upper end of the water tank by a supporting end.

A plasma cutting apparatus for a flange according to the present invention includes a base for supporting a plate member, a head including a plasma nozzle, a transfer unit for moving the head in a plane, a controller for controlling the transfer unit, a water tank formed on the base, When the head cuts a plurality of flange outer contours, the plate is deformed by heat generation and is moved to the side by the plasma ejected at the time of cutting. There is an effect that the plate material can be fixed and the flange with high precision can be cut at a high yielding speed.

1 is a configuration diagram of a plasma cutting apparatus for a flange according to the present invention,
2 is a schematic view of cutting a flange in a plate material,
FIG. 3 is a schematic view showing a process of simultaneously cutting a plurality of flanges using the apparatus of FIG. 1,
Fig. 4 is a schematic view for explaining the plate material transfer shown in Fig. 3,
Fig. 5 is a configuration diagram of the fixing device shown in Fig. 1,
6 is a structural diagram showing an example in which a plate material is mounted on a water tank.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, a plasma cutting apparatus 100 for a flange according to the present invention includes a base 10 for supporting a plate 1, a water tank 20 provided at a central portion of the base 10, A head 50 mounted on the conveying unit 30 and moving in a plane direction to the base 10 in accordance with the operation of the conveying unit 30, a conveying unit 30 installed on the conveying unit 10, A fixing device 60 formed on a side surface of the water tank 20 for fixing the plate 1 and a control device 90 for controlling the position of the head 50 and the ejection of the plasma by controlling the feeding part 30 .

The base 10, the feeder 30, the head 50 and the control device 90 have the same structure as that of a conventional plasma cutting device. When a specific shape is input to the control device 90, (50) cuts the shape.

In this case, as shown in FIG. 1, the base 10 is configured such that two sub-assemblies are disposed on both sides and both ends of the sub-assembly are connected to each other for fixing.

The conveying unit 30 includes a portion for conveying the head 50 in the longitudinal direction of the base 10 and a portion for conveying the head 50 in the width direction.

2, the flange 2 is composed of an inner diameter portion 3 and an outer diameter portion 4, and after cutting the inner diameter portion 3 from the plate material 1, The outer diameter portion 4 is cut to produce a single flange 2.

Particularly, in cutting the outer diameter portion 4, the head 50 starts to cut from the side of the plate material 1 and cuts the outer diameter portion 4, so that the work itself progresses continuously without additional hole processing, However, there is a disadvantage that the unnecessary portion is cut between the side of the plate material 1 and the outer diameter portion 4, which is somewhat disadvantageous in terms of the process.

The plasma cutting apparatus 100 for a flange according to the present invention proposes a configuration in which a plurality of flanges 2 are integrally fabricated from one plate 1.

That is, as shown in Fig. 3, first, the inner diameter portion 3 is formed continuously.

Thereafter, the head 50 is inserted into the side surface, and half of the outer diameter portion 4 of the plurality of flanges 2 is cut.

Thereafter, the other half of the outer diameter portion 4 is sequentially cut to complete the fabrication of the plurality of flanges 2.

The above method is advantageous in that it is fairly advantageous in that it is formed between the flange 2 and the plate member 1 only between the flange 2 and the initial flange 2 and thus is formed in the individual flange 2 in the conventional method.

Since the plasma is an object having a mass, the plasma ejected through the head 50 removes a part of the plate 1 with a high temperature and cuts it, so that it constantly applies force to the plate 1.

In the case of cutting the flanges 2 one by one according to the conventional method, the pressing force of the plate material 1 generated by the plasma is negligible and can be neglected. However, in the present invention, half of the outer diameter portion 4 of the plurality of flanges 2 In the case of sequentially machining, the plate material 1 is moved by the continuous pressing force.

Particularly, when the cutting is proceeded, the force due to the plasma acting on the separated plate material 1 is canceled by the movement of the separating plate 1, but the remaining plate material 1 is subjected to the continuous side load, In the method of the present invention in which a plurality of flanges 2 are moved simultaneously and the flange 2 is machined, the error of the outer diameter portion 4 gradually increases, Outside diameter shows difference from design specification.

Therefore, the plasma cutting apparatus 100 for a flange according to the present invention includes a fixing device 60 as shown in FIG. 5 in order to overcome the above disadvantages.

6, when the plate material 1 is seated on the upper end of the water tub 20, the fixing device 60 is formed in a shape of a step capable of supporting the plate material 1. In order to avoid interference, It is preferable that the plate member 1 is rotatably mounted on the left side after the plate member 1 is mounted.

At this time, the water tank 20 is installed inside the base 10, and water is contained therein. The water in the water tank 20 partially evaporates to cool the high temperature part of the plate material 1 and the jet fumes generated by the plasma flow into the water tank 20, And the effect of eliminating the fire risk due to the fire.

The fixing device 60 includes a fixing part 61 and a rotation part 62 for rotatably coupling the water tub 20 and a stopper 63 for fixing the fixing part 61 after standing up the fixing part 61 .

At this time, the stopper 63 may be inserted into the fixing hole 21 formed on the side of the water tank 20, but other types of fixing means may be applied.

It is preferable that the fixing device 60 is provided at two sides opposite to the starting point of the processing of the plate material 1. The fixing device 60 is installed at each side of the side surface of the water tank 20, It is preferable to stand up.

On the other hand, since the plate material 1 is exposed to high heat when plasma processing is performed, there is a possibility that a part of the plate material 1 accumulates heat due to high temperature. Therefore, as shown in FIG. 6, And is spaced apart from the water tub 20 by a predetermined distance.

The supporting end 22 is a rod having a rectangular cross section, the rod having a length that can be installed across the entire water tank 20, and may be installed in close contact with the plate 1 if necessary .

Therefore, the plate member 1 having a small size by the support end 22 is also seated on the upper end of the water tub 20 to perform cutting.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, And all of the various forms of embodiments that can be practiced without departing from the technical spirit.

1: Plate 2: Flange
3: inner neck part 4:
10: Base 20: Water tank
21: Fixing hole 22: Supporting step
30: feeder 50: head
60: Fixing device 61: Fixing part
62: rotation part 63: stopper
90: Control device 100: Plasma cutting device

Claims

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1. A plasma cutting apparatus for a flange, which cuts a plate material in a flat plate shape to produce an annular flange,
A base supporting the entire device;
A head including a plasma nozzle, the head performing a cutting by spraying a plasma on the plate material;
A transfer unit installed between the base and the head for transferring the head to a plane;
A water tank disposed in the center of the base for supporting the plate and containing water therein;
A fixing device installed in the water tub to prevent movement of a plate material seated on the top of the water tub;
And a control device controlling the transporting part to control a movement locus and an operation of the head,
The control device controls the trajectory of the head so as to cut a plurality of flanges into the inner diameter portion first, then sequentially cut the outer diameter portion of each flange half-by-one, and then cut the other half in reverse order, Wherein the flange is provided with a flange portion.

The plasma cutting device for a flange according to claim 2, wherein the fixing device is provided on two side surfaces of the water tank.

[4] The apparatus according to claim 3, wherein the fixing device comprises a stationary portion in the form of a rectangular multi-sided surface, a rotating portion for rotationally connecting the stationary portion and the water tub, a fixing hole formed in the water tub, and a stopper inserted in the fixing hole Plasma cutting equipment for flanges.

The plasma cutting device for a flange according to claim 4, wherein the plate member is seated on the upper end of the water tank by a supporting end.