KR100804026B1 - Interior expansion type pipe cutting method and cutting device - Google Patents

Abstract

A method of cutting a pipe and a pipe cutting machine using the method are provided to cut a pipe quickly without making any deformation in cross-sectional area by expanding cutter blade from inside to outside of the pipe. A pipe cutting machine includes a pipe feeder, a stopper, a clamper having clamps(12), a portion for operating a tool, a portion(40) for cutting a pipe with cutter blades(50), a push bar(60) having a tapered area(61), a slide groove, and an external tubular member(41). A method of cutting a pipe without making any deformed cross-sectional area includes a step of clamping a pipe with clamps at two places having a gap where location of cutting the pipe is placed between the two clamped places, a step of inserting a cutter device into the pipe and cutting the pipe by expanding cutter blades in a radial direction while clamps outside of pipe is functioned as fixed blades, a step of rotating cutting blades to cut the rest of circle equally divided by more than 4 sections, a step of pulling the cutter device backwards to remove the cutter device from the pipe and loosening the clamps to remove pipe and scrap from a pipe cutting machine.

Description

Interior expansion type pipe cutting method and cutting device

1 is a perspective view showing the overall configuration of a cutting device according to the present invention

Figure 2 is an enlarged perspective view of the main portion of the cutting device according to the present invention

Figure 3 is a perspective view showing a cutting operation of the cutting device according to the present invention

Figure 4 is a process diagram showing a pipe cutting process in accordance with the present invention in order

5 is a cross-sectional view of the cutting operation unit according to the present invention.

Figure 6 is a perspective view showing a coupling state of the expansion blade and the operating rod according to the present invention

7 is a cross-sectional view taken along the line A-A of Figure 5 showing the cutting process according to the present invention in order

*** Description of the symbols for the main parts of the drawings ***

1: base

10, 10 ': Clamp unit 11: crevice

12, 12 ': Clamp

20: stopper device 21: stopper

22: hole

30: tool operating part

40: cutting operation part 41: outer tube

42: working hole

50: expansion blade 51: slide groove

60: operating rod 61: taper

62: slide protrusion

100: pipe

The present invention relates to an apparatus for cutting a pipe, and in particular, by cutting the pipe while the cutting blade is extended to the outside to enable efficient cutting without modifying the shape of the pipe cross section.

As is well known, when cutting a relatively thin pipe, it is necessary to pay attention to the shape of the cross section unlike when cutting a round bar. In general, a method of cutting a pipe includes cutting with a saw blade, cutting with an oxygen welding machine, Or there is a method of cutting by gradually pressing the pipe with a cutting blade.

In the case of cutting by saw blades, the cutting surface is neat, but the cutting time takes a lot of time, and in the case of a thin pipe, the pipe may be distorted, so the cutting work should be carried out very carefully.

In addition, in the case of cutting using an oxygen welder, it takes a lot of time and costs a lot because it takes oxygen while the cutting surface is not neat.

In the case of copper pipes, circular cutting blades may be cut by gradually moving toward the center while cutting around the pipe, but in this case, it takes a lot of time and the cross section of the cut part is pushed into the inside. have.

Among these various cutting methods, the pipe is cut by selecting an appropriate method according to the thickness or material of the pipe to be cut, but there is a drawback in that it takes a lot of time in general and a lot of attention should be paid to the deformation of the cross-section of the pipe. Have

The present invention is suitable for cutting a pipe made of a material having plasticity, such as stainless steel, iron plate, brass, etc., while being relatively thin among pipes of various materials and shapes, and fixing a portion to be cut from the outside of the pipe and cutting the inside. It is an object of the present invention to provide a cutting method and a cutting device for cutting a blade while expanding the blade.

Hereinafter, the cutting method and the cutting device of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the overall configuration of a cutting device according to the present invention, Figure 2 is an enlarged perspective view of the main portion of the cutting device according to the present invention, Figure 3 is a perspective view showing a cutting operation of the cutting device according to the present invention, Figure 4 Figure 5 is a process diagram showing a pipe cutting process according to the present invention in sequence, Figure 5 is a cross-sectional view of the cutting operation portion according to the present invention, Figure 6 is a perspective view showing a coupling state of the expansion blade and the operating rod according to the present invention, Figure 7 is 5 is a cross-sectional view taken along the line AA of Figure 5 in order showing the cutting process according to the present invention.

It looks at the cutting method of the present invention.

Fix the two places with a gap at the position to cut into the pipe, and fix each with a circular clamp having the same inner diameter as the outer diameter of the pipe.

The clamp is configured by dividing the circumference into two or more uniform angles to allow relaxation and close contact, and to fix the pipe while making a complete circle when closely contacting to the center.

The cutting device is cut by inserting a cutting device for cutting inside the pipe, and the cutting device opens a plurality of extension blades with a thickness equal to the gap between the clamps in a radial direction, so that the clamp outside the pipe acts as a fixed blade. To be cut.

In the cutting process, the expansion blade is difficult to cut the entire pipe, that is, the entire 360-degree direction at a time, so that the 360-degree is divided equally into four or more angles, and then the expansion blade is formed in the angular portion of the skipped position The part is cut first and then the cutting blade is rotated to cut the remaining angular part.

When the cutting is completed by two expansion operations of the expansion blade, the cutting operation is completed by reversing the cutting device to get out of the pipe and releasing the clamp to remove the scrap separated in the same thickness as the cut pipe and the expansion blade.

Look at the cutting device for implementing the above cutting method in detail.

Two clamp device parts 10 and 10 'are formed in a symmetrical form on one side of the upper end of the base 1, and in the center of the clamp device parts 10 and 10', the outer diameter of the pipe 100 to be cut and Clamps 12 and 12 'of the same size can be formed by dividing the circumference into several uniform angles and moving in the radial direction toward the center of the pipe.

The two clamps 12, 12 'have a gap 11 between them.

At the rear end of the clamp device portions 10 and 10 ', a stopper device portion 20 which is movable in the longitudinal direction is constituted. In the center thereof, a stopper 21 having a hole 22 which is the same as the inner diameter of the pipe 100 is provided. It is configured to prevent the pipe 100 to enter the hook stopper 21 to enter any more.

The rear end of the stopper device 20 is configured with a tool operating part 30 which is movable in the longitudinal direction again, and the tool operating part 30 protrudes toward the direction in which the pipe 100 is located, that is, the stopper device 20. While being inserted into the inner diameter of the pipe 100 is a cutting operation portion 40 is configured to perform a cutting action.

This cutting operation part 40 is an outer tube 41 having an operating hole 42 to allow the expansion blade 50 to cut out the size of the outer diameter is inserted into the inner diameter of the pipe 100, and, It is composed of an extension blade 50 which is installed inside the distal end of such an outer tube 41 and cuts out to the operation hole 42 and functions to expand the extension blade 50. .

Looking at the configuration of the expansion blade 50 and the operating rod 60 in detail, the tapered portion 61 is formed to decrease in diameter toward the tip of the operating rod 60 and the expansion blade having the same inclination on the tapered portion 61 Combination (50), but the expansion blade 50 is formed by forming the expansion blade 50 in the angular portion of the skipped position by dividing 360 degrees evenly into four or more angles, when not in operation The pipe 100 is cut out while not protruding to the outside of the outer tube 41 and protruding to the outside only when the cutting action is performed.

And when looking at the coupling configuration of the tapered portion 61 and the expansion blade 50, the tapered portion 61 is formed with a slide protrusion 62 in the longitudinal direction and the expansion blade 50 to form a slide groove (51) When the operating rod 60 is advanced by combining, the expansion blade 50 is protruded while pushing up the circumference of the pipe 100 by the thickness of the expansion blade 50, and when the operating rod 60 is reversed, the expansion is expanded. The blade 50 enters the inside of the operation hole 42.

The tool operation unit 30 has the function of advancing the cutting operation unit 40 back and forth for cutting and inserting into the inside of the pipe 100 and the function of advancing the operating rod 60 back and forth for the cutting operation. 40 is to rotate the entire angle by a certain angle.

Reference numeral 70 in the figure is a pipe supply.

Looking at the action of the cutting device according to the present invention having such a configuration in detail as follows.

When one pipe 100 enters from the pipe supply part 70, the stopper device part 20 passes through the clamps 12 and 12 ′ of the clamp device parts 10 and 10 ′ in an open state. After reaching until the stopper 21 is caught, the entry is stopped. The length of the pipe 100 to be cut is determined by adjusting the position of the stopper device 20 in the above.

In this state, the clamp device unit 10 operates to clamp the pipe 100 by asking the outer diameter of the clamp 12, 12 ′.

After the pipe 100 is fixed, the tool operation unit 30 is operated to insert the entire cutting operation unit 40 into the inside of the pipe 100.

The degree to which the cutting operation part 40 is inserted is as much as a predetermined cutting length, and the extension blade 50 of the cutting operation part 40 is exactly positioned between the clamps 12 and 12 '.

After the cutting operation part 40 is inserted, the tool operation part 30 is operated again to push the operating rod 60. When the taper part 61 moves forward due to this operation, the slide protrusion 62 The expansion blade 50 coupled with the slide groove 51 is pushed outward to protrude to the outside of the outer tube 41, and by this operation the expansion blade 50 is connected between the clamps 12, 12 '. While pushing up the thickness of the pipe 100, the cutting edge 50 is formed to be cut by the angle formed.

This state is not a state in which the pipe 100 is completely cut, but about half of 360 degrees is cut, and the action of cutting the remaining portion should be performed once more. After entering into the operation hole 42 of the outer tube 41, the tool operating portion 30 is to rotate the entire cutting operation portion 40.

In this rotation, the position of the expansion blade 50 is rotated at an angle that is not cut by the above-described one operation, and in this state, the pipe 100 is completely ( 360 degrees).

After the cutting is completed, the entire cutting operation part 40 is removed from the pipe, and the clamps 12 and 12 are released to remove the cut pipe 100 'and the removed pipe piece 100 ", and again. As described above, the operation of cutting the pipe 100 to be cut is repeated.

According to the present invention as described above, the two clamps acting as a fixed blade from the outside to fix the outer surface of the pipe between the expansion blade inside the pipe between the two through the expansion operation, in the cutting process The clamp secures the pipe firmly and the cutting blade extends between the clamps to cut the pipe so that the cross section of the pipe is not deformed and the cutting is completed through two expansion operations. In addition, it can be said that the invention is very useful, such as low cost.

Claims (5)

With a gap at the cutting position of the pipe, fix the two places with a circular clamp having the same inner diameter as the outer diameter of the pipe, and the clamp is divided into two or more circumferences at a uniform angle to allow for relaxation and close contact. , The cutting device is cut inside the pipe, and the cutting device opens a plurality of extension blades with a thickness equal to the gap between the clamps so that the pipe outside the pipe acts as a fixed blade to cut the pipe. and, In the cutting process, the extended blade is divided equally into 360 degrees at four or more angles, and then the extended blade is formed in the angular portion of the skipped position one by one to cut the corresponding portion first and then rotate the cutting blade to rotate the remaining angular portion. Expand to cut, When the cutting is completed, the cutting device is reversed to escape from the pipe and the clamp is relaxed to remove the scrap separated in the same thickness as the cut pipe and the extension blade so that the cutting operation is completed. . Two clamp device parts 10 and 10 'are formed in a symmetrical form on one side of the upper end of the base 1, and in the center of the clamp device parts 10 and 10', the outer diameter of the pipe 100 to be cut and Construct clamps 12 and 12 'having the same inner diameter, The stopper device 20 is formed at the rear end of the clamp device 10 and 10 ', and the stopper 21 having the same hole 22 as the inner diameter of the pipe 100 is formed at the center thereof. 100 is caught by the stopper 21 to prevent entry anymore, After the stopper device portion 20 is installed in the tool operating portion 30 is inserted into the inner diameter of the pipe 100 to configure the cutting operation portion 40 to perform a cutting action, The cutting operation portion 40 is an outer tube 41 having an outer diameter 41 and a size that can be inserted into the inner diameter of the pipe 100 and having an operation hole 42 for causing the expansion blade 50 to float, and the outer tube 41. It is composed of an extension blade 50 which is installed inside the distal end of the working blade 42 and cuts out while acting as a cutting action, and an actuating rod 60 that expands the expansion blade 50. Tool operation unit for the function of inserting the cutting operation unit 40 back and forth to insert into the inside of the pipe 100, the function of advancing the operating rod 60 back and forth, and the function of rotating the entire cutting operation unit 40 by a certain angle. Internally expandable pipe cutting device, characterized in that consisting of (30). The method of claim 2, The clamps 12, 12 'of the clamp portions 10, 10' are configured to be divided in several uniform angles so as to be movable in the radial direction toward the center of the pipe 100, and the gap 11 Internally expandable pipe cutting device characterized in that it is installed to have. The method of claim 2, The actuating rod 60 forms a tapered portion 61 which decreases in diameter toward the tip and couples the expansion blade 50 having the same inclination to the tapered portion 61, but the expansion blade 50 is 360 degrees. Internally expandable pipe cutting device, characterized in that formed by forming an extension blade (50) in the angular portion of the skipped position one by one evenly divided by more than one angle. The method according to claim 2 or 4, The coupling rod of the tapered portion 61 and the expansion blade 50 forms the slide protrusion 62 in the longitudinal direction on the tapered portion 61 and the slide groove 51 is formed on the expansion blade 50 to engage the operating rod. The expansion blade 50 is protruded when the 60 is advanced and the expansion blade 50 is retracted when the operating rod 60 is retracted.

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