KR20030010921A - Pipe cutting apparatus - Google Patents

Abstract

PURPOSE: A pipe cutting apparatus is provided to improve weldability and reduce working time by obtaining superior cutting quality of straight cutting as well as inclined cutting during cutting operation of a pipe. CONSTITUTION: The pipe cutting apparatus comprises a body part(10) comprising a rotational cover(15) which is rotationally installed at a chuck(11); an angle control part(30) comprising a guide plate(31) which is coupled to the other end of fixing bars(12a,12b) by a hinge, and in front of which a plurality of guide grooves corresponding to a cutting angle are formed, one end of the fixing bars is fixed onto the vertical outer surface of the chuck, a driven gear(33) that is in gear with a driving gear(43) which is rotationally installed at the outer diameter of the guide plate and rotated by a motor(41) fixed to the guide plate, and a rotational gear box which is installed in the front of the driven gear; and a torch part(50) comprising a shaft(51) which is rotationally and perpendicularly connected to the rotational gear box, a guide support(56) which is movably inserted into the shaft, and at the end of which a guide roll rested on any one groove out of the guide grooves is installed, a support roll(60) which is connected to the guide support(56) so that the support roll(60) is rolled along the outer circumferential surface of a pipe (P) to be cut, and a torch (TH) which is connected onto the shaft to cut the pipe.

Description

Pipe Cutting Machine {PIPE CUTTING APPARATUS}

The present invention relates to a cutting device, and more particularly to a pipe cutting device capable of cutting the oblique angle and chamfering as well as the round cutting of the pipe.

In general, piping lines used in industrial sites are often composed of inclination angles such as straight line, 15 °, 30 ° and 45 °, and the opposite ends, which are the connection points of the two pipes, are cut and used according to the inclination angle.

Therefore, the quality of the cutting surface leads to the welding quality, and there is a great difference in working time according to the skill of the operator.

In particular, when the high-pressure pipe work, the pipe inclination angle cutting and chamfering work, so even if a high-skilled worker cut, the quality is inevitably deteriorated.

Therefore, the present invention has been made to solve the problems of the prior art by ensuring excellent cutting quality of inclination angle cutting as well as straight cutting during pipe cutting operation, it is possible to cut the straight line and inclination angle that can double the weldability and reduce the working time It is an object to provide a pipe cutting device.

1 is a perspective view showing a pipe cutting device according to the present invention.

Figure 2 is a sectional view of the body portion according to the present invention.

Figure 3 is a perspective view showing the front of the guide plate of the pipe cutting device according to the invention.

4 is a cross-sectional view showing a guide plate according to the present invention.

5 is a cross-sectional view showing an angle adjusting screw and the adjusting handle according to the present invention.

Figure 6 is a plan view showing the operation of chamfering the pipe using a pipe cutting device according to the present invention.

Figure 7 is a plan view showing the operation of obliquely cutting the pipe to 30 ° using a pipe cutting device according to the present invention.

8 is a plan view illustrating an operation of obliquely cutting a pipe by 45 ° using a pipe cutting device according to the present invention.

Explanation of symbols on the main parts of the drawings

P: Pipe TH: Torch

10 body portion 11: chuck

13: high information 15: rotating cover

30: angle adjuster 31: guide plate

33: driven gear 38: rotary gear box

43: drive gear 44a, 44b: guide groove

50: tochibu 51: first axis

53 gas distribution valve 54 second axis

55: third axis 59: fourth axis

In order to achieve the above object, the pipe cutting device of the present invention includes an angle adjusting unit for transferring a cutting torch according to an inclination angle of a pipe to be cut, a torch unit for cutting a pipe while rotating by a motor of the angle adjusting unit, and a torch unit. And body which supports the angle adjusting part and prevents the hose and the cutting cable from being twisted during the cutting rotation operation of the pipe.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view showing a pipe cutting device according to the present invention, Figure 2 is a cross-sectional view showing a body portion according to the present invention, Figure 3 is a perspective view showing the front of the guide plate of the pipe cutting device according to the invention, 4 is a cross-sectional view showing a guide plate according to the present invention, Figure 5 is a cross-sectional view showing an angle adjusting screw and the adjustment handle according to the present invention.

As shown in FIG. 1, the cutting device according to the present invention has a body 10 which prevents the gas hose and the cutting cable from being twisted during the cutting rotation operation of the pipe P, and according to the inclination angle of the pipe P to be cut. It consists of an angle control part 10 which conveys the cutting torch TH, and the torch part 50 which cuts the pipe P while rotating by the operation of the angle control part 10.

As shown in FIG. 2, the body portion 10 includes a cylindrical chuck 11 that is not rotated and fixed, and a rotation cover 15 that is rotatably installed on one side of the chuck 11.

The chuck 11 has a through hole 11a formed at the center thereof, and one end of the fixing bars 12a and 12b is bolted to the upper and lower outer surfaces thereof.

The high intelligence 13 is bolted and fixed to one side of the chuck 11, and a plurality of O-rings 14 are installed on the outer side of the high intelligence 13 so that the high intelligence 13 and the rotating cover are installed. Seal between (15).

The rotary cover 15 inserted outside the high information 13 is rotated about the high information 13, and bearings 16 are installed at both ends of the high information 13 so that the rotation cover 15 is rotated. ) To allow smooth rotation.

At one end of the rotary cover 15, a bearing cover 17 for preventing separation of the bearing is assembled with bolts.

The plurality of gas movement paths 18 formed on the outer surface of the rotary cover 15 communicate with one side of the high information 13 through the boundary between the high information 13 and the rotary cover 15.

A nipple 19 is inserted into an inlet of the gas moving path 18 on one side of the high information 13 and an outer side of the rotary cover 15, and a gas hose supplying oxygen and LPG gas to the nipple 19 ( 20) is connected.

The body portion 10 configured as described above is provided with an angle adjusting portion 30 for adjusting the angle at the left and right rotation of the guide plate connected to the chuck 11.

As shown in Figures 1 and 3 to 5, the angle adjustment unit 30 is rotatably installed around the other end of the upper and lower fixed bars 12a, 12b, for this purpose, the upper and lower fixed bars 12a ( 12b) end and the guide plate 31 is assembled by a hinge pin (32).

The angle adjusting part 30 is driven by the driven gear 33 assembled to the outer diameter of the guide plate 31, the angle adjusting screw 34 hinged to the rear surface of the guide plate 31, and the angle adjusting screw 34. Adjustment handle 35 to be screwed, the angle indicator 36 and the goniometer 37 to check the angle change value of the guide plate 31, and the rotary gear box 38 to adjust the horizontal movement angle of the torch portion Is made of.

Here, the bearing 39 is inserted between the guide plate 31 and the driven gear 33 to assist rotation of the driven gear 33, and the guide gear 33 and the bearing 39 are guided so as not to be separated from the guide plate. The cover 40 is bolted to the front of the plate 31.

Rotation of the driven gear 33 is rotated by the motor 41, for this purpose, the motor 41 is installed on the mounting table 42 fixed to the rear of the guide plate 31, the rotation shaft of the motor 41 The drive gear 43 meshed with the driven gear 33 is provided.

The guide plate 31 has a hole 31a into which the pipe P is inserted at the center thereof, and the guide grooves 44a and 44b have a circular and elliptical shape so that the torch is transported in accordance with the pipe cutting inclination angle. Is formed.

When the guide groove 44a is circular, the cutting angle of the pipe P is perpendicular to the longitudinal direction of the pipe P, and the guide groove 44 of the elliptical 44b is the cutting angle of the pipe P. Are suited for 15 °, 30 ° and 45 ° cases with respect to the longitudinal direction.

The above-described adjustment handle 35 is supported by the 'c' shaped fixing bracket 45 fixed to the lower fixing bar 12b, and more preferably rotatably installed on the upper surface of the fixing bracket 45. It is inserted into the fixed block 46 is supported.

To this end, as shown in FIG. 5, an insertion protrusion 46a is formed on a lower surface of the fixing block 46, and a hole 45a into which an insertion protrusion 46a is inserted is formed on an upper surface of the fixing bracket 45. The fixed block 46 is formed with a sliding hole 46b into which the adjustment handle 35 can be inserted, and a bearing is installed to reduce friction and smooth rotation of the adjustment handle 35. In addition, in order to prevent the adjustment handle 35 from being separated from the fixed block 46 during the rotation of the adjustment handle 35, the separation prevention fixing ring 35a is installed on both sides of the pipe of the adjustment handle 35.

When the guide plate 31 is rotated by the adjustment handle 35, the angle indicator 36 is fixed to the rear surface of the guide plate 31 so as to correctly indicate the rotated angle. The goniometer 37 is bolted to the lower fixing bar 12b.

On the other hand, the front of the driven gear 33 is provided with a rotary gear box 38 to enable the horizontal rotation of the torch portion and to check the rotation angle of the torch portion.

On the upper surface of the rotary gear box 38, a scale 38a for displaying the rotation angle of the torch portion is displayed, and a worm wheel 38c in which the angle adjusting handle 38b is assembled at the center of rotation is embedded.

As shown in FIG. 1, the above-described torch part 50 is coupled to the rotary gear box 38.

That is, the first shaft 51 having approximately 90 ° rotated in the forward direction of the letter 'a' is installed while being supported by the bearing 38d provided in the rotary gear box 38.

An indicator gauge 52 indicating the rotation angle of the first shaft 51 is assembled at the upper end of the first shaft 51 to indicate the scale 38a of the rotary gear box 38.

The worm gear 51a installed on the first shaft 51 is engaged with the worm wheel 38c embedded in the rotary gear box 38 to rotate left and right according to the rotation of the angle adjustment handle 38b.

A gas distribution valve 53 in which a valve is installed is mounted on the middle of the first shaft 51, and one side of the gas distribution valve 53 is a nipple 19 and a gas hose 20 installed in the above-described rotary cover 15. ) And the upper side is in communication with the torch TH through the hose.

At the end of the first shaft 51, a second shaft 54 is rotated in which the letter 'b' is rotated 90 ° in the forward direction.

The third shaft 55 is inserted below the second shaft 54 so as to be rotatable about the second shaft 54, and the outer side of the third shaft 55 is perpendicular to the third shaft 55. The guide support bar 56 is fixed in the direction.

The guide roll 57 is pinned to the end of the guide bar 56 so as to be rotatably pinned to enable rolling in any of the above-described guide grooves 44a and 44b.

An adjustment block 58 having an insertion hole 58a is mounted on the position fixing jaw formed by partially cutting the lower end of the third shaft 55, and the adjustment block 58 is coupled to the handle 58b and a key. Pinion gear 58c is provided.

The fourth shaft 59 inserted into the lower portion of the third shaft 55 has a rack gear 59a formed perpendicularly to the side surface thereof, is engaged with the pinion gear 58c described above, and has a lower end of the pipe P to be cut. Support rolls 60 are installed along the outer circumferential surface.

A fixing block 61 having an opening 61a and a through hole 61b is installed in the lower portion of the fourth shaft 59, and the rack gear 59a is provided in the through hole 61b similarly to the adjustment block 58 described above. Height adjustment pinion gear 62 is engaged with the fine adjustment handle 63 and fixed, and the torch fixture 64 for fixing the torch TH on the opening 61a side is changeable. It is bolted.

The torch TH inserted into the torch fixture 64 is connected to the gas hose 20 connected to the gas distribution valve 53 to receive oxygen and LPG.

Pipe cutting device according to the present invention configured as described above as shown in Figures 6 to 8, has the following action.

First, when the pipe P is to be cut in a straight line or inclination angle, the angle adjusting screw 34 of the device is turned by the cutting inclination angle to adjust the inclination angle of the guide plate 31. That is, in the inclination angle adjustment, when the angle adjusting screw 34 is rotated by rotating the adjustment handle 35, the inclination angle of the guide plate 31 is changed with respect to the upper and lower fixed bars 12a and 12b.

When the inclination angle is changed, since the fixing block 46 is fitted into the hole 45a of the fixing bracket 45, the fixing block 46 rotates left and right according to the inclination angle.

When the horizontal angle adjustment of the guide plate 31 is finished, the angle adjusting handle 38b of the rotary gear box 38 is first in order to make the support roll 60 of the torch portion 50 closely contact the pipe P to be cut. Rotate to approach the support roll 60 provided on the fourth shaft 59 to the outer surface of the pipe (P).

The guide rolls 57 attached to the third shaft 55 are positioned in the guide grooves 44a and 44b which are processed on the front surface of the guide plate 31 according to the inclination angle to be cut, and the second shaft 54 ) Is fixed to the bolt so as not to be separated from the first shaft (51), by turning the handle (58b) of the adjustment block 58, the support roll 60 at the bottom of the fourth shaft (59) to be cut pipe (P Adjust so that it comes in close contact with the outer surface of the

Turn the handle of the fixing block 61 to maintain the height of the torch TH properly with the pipe P. When cutting the chamfer, loosen the bolts fixing the torch fixture 61 and adjust the chamfering angle again. Tighten to fix.

When the installation is completed in this way, the valves of oxygen and LP gas are opened, the valves of the gas distribution valve 53 of the present invention are operated to ignite the cutting torch TH, and the motor 41 is driven.

Then, the driven gear 33 is rotated, and the torch part 50 is rotated along the driven gear 33.

Accordingly, the guide roll 57 is moved along the guide grooves 44a and 44b, while the third shaft 55 is moved left and right on the second shaft 54.

And the movement trajectory follows the guide grooves 44a and 44b formed in the guide plate 31, so that the pipe P is cut at an angle corresponding to the guide grooves 44a and 44b.

At this time, the rotary cover 15 rotates around the high information 13 and the gas hose 20 for supplying oxygen and LPG does not get caught by the device because it rotates outside of the entire device.

As described above, according to the present invention, when the pipe cutting operation for cutting round or inclined angle is performed, the pipe is automatically cut while rotating along the round or inclined angle guide groove of the torch in a fixed state so that the desired inclined angle and chamfering angle, and clean The cutting surface can be obtained, the welding quality is improved, and the overall work time can be shortened and the labor cost can be reduced.

Claims (3)

Body portion consisting of a rotary cover rotatably installed on the chuck; A guide plate hinged to the other end of the fixing bar having one end fixed to the upper and lower outer surfaces of the chuck, and having a plurality of guide grooves formed at a front thereof corresponding to a cutting angle, and rotatably installed at an outer diameter of the guide plate. An angle adjusting unit including a driven gear meshed with a drive gear rotated by a motor fixed to the rotating gear box, and a rotary gear box installed at the front of the driven gear; And A guide coupled to a shaft coupled in a direction rotatably perpendicular to the rotary gear box, a guide roll inserted into the shaft and movably mounted at one end of the guide groove to be rollably seated at one end thereof, and the guide And a torch portion comprising a support roll connected to a support and rolled along an outer circumferential surface of the pipe to be cut, and a torch connected to the shaft to cut the pipe. The method of claim 1, wherein the angle adjustment unit, And an angle indicator having one end fixed to the rear surface of the guide plate, and an angle meter installed on the fixed bar and having a scale corresponding to the angle indicator. The method of claim 1 or 2, wherein the angle adjustment unit, The adjusting handle is screwed to the angle adjustment screw hinged to the rear of the guide plate, the fixing block is rotatably fixed and the insertion block is formed on the lower surface, and the insertion hole is inserted into the upper surface And a fixing bracket which is formed and fixed to the lower fixing bar.