JP2517891Y2 - Steel pipe cutting / beveling machine - Google Patents

Description

[Detailed Description of the Invention] (a) Purpose of the Invention <Industrial Application Field> The present invention relates to the technology of cutting rectangular steel pipes and round steel pipes and groove machines.

<Prior art> Steel pipes for building structures are often cut from a long product to a predetermined length and formed, or the long product is used as it is.
At the time of construction, for joining and assembling adjacent members, there are many processes such as welding a joint or a diaphragm to each end and screwing or butt welding.

In particular, in the case of large-diameter thick-walled square steel pipes, it is usual to connect structural members to each other by butt welding of end faces. It is said that a good welding joint can be obtained by providing a welding groove of the mold.

By the way, conventionally, the cutting of the long steel pipe and the beveling of the end face of the long steel pipe have been performed by different machines or places, so that the work of moving, transporting or aligning heavy objects, clamping, etc. must be carried out each time. However, there are many inconveniences such as the necessity of the groove processing and the difficulty in obtaining a stable groove surface and shape when the groove processing is separately performed with a torch.

<Problems to be solved by the invention> Therefore, in the present invention, when the steel pipe is cut to a predetermined length, the end faces of the cut steel pipe are cut together without opening the clamp of the steel pipe fixed for processing. By moving to a position suitable for processing and applying grooved cutters to both end faces in the same place, it is possible to perform predetermined length cutting of the steel pipe and end face groove processing at one processing, one facility, one place By providing a device for cutting and simultaneously beveling the end surface of the steel pipe produced thereby, efficient cutting and accurate welding beveling are performed, thereby solving various problems inherent in conventional means The purpose is to do.

(B) Configuration of the Invention <Means for Solving the Problem> In order to achieve the above object, the steel pipe cutting / beveling machine of the present invention has the following respective requirements.

(1) A ring plate rotatably supported about the axis in a plane orthogonal to one axis, a mechanism for driving the ring plate at least 180 ° in forward and reverse directions, and the ring plate Above, each pair of heads respectively held slidably in the diametrical direction of the ring plate, mounted between the heads and the outer peripheral edge of the ring plate, and operated so as to face each other and to come close to and separate from each other. A pair of cutting cutters that are mounted on drive shafts that are axially supported in parallel with the center axis of rotation of the ring plate and that are driven in a plane parallel to the plane of the ring plate on the opposite end sides of the hydraulic mechanism and the head. And groove cutters, and guide rollers and rings that are provided at the tips of the heads to which the cutters are attached and that guide the heads along the steel pipe peripheral wall surface when the ring plate rotates in contact with the steel pipe peripheral wall surface. Of the steel plate, which moves in the longitudinal direction along the axis of rotation of the steel plate, at the front side and the rear side of the ring plate, respectively, and means for slightly moving the clamping device in the axial direction relative to each other. A steel pipe cutting / grooving machine, which is characterized in that it cuts and welds are formed on both cut surfaces.

<Operation> On the center of the steel pipe cutting and beveling machine body, on a large ring plate rotating in a vertical plane, two cutting cutters and two beveling cutters facing each other are parallel to the plane containing the ring plate. Driven in a plane that
It is assembled so that it can slide and urge toward the center of rotation of the ring plate by a hydraulic mechanism.

Then, when the ring plate rotates, both the cutting cutter and the groove cutter are guided by the guide rollers having the outer peripheral wall of the steel pipe, particularly the rectangular steel pipe (column) as a guide, to cut and groove the peripheral wall of the steel pipe.

The input (front) side of the machine body is equipped with a column carry-in table, the entrance side centering device, the entrance side pinch roll, and the entrance side clamp device, and the exit side (rear) side of the machine body is equipped with the exit side clamp device and the exit side clamp device. Side pinch roll, output side centering device,
Each carry-out table is installed.

The column is placed on the carry-in table, the left and right centering of the steel pipe is performed there, and the cutting dimension is measured at the same time when the column is carried into the machine body.

Next, clamp the column and activate the pair of hydraulic mechanisms.
Energize the cutting cutter symmetrically and at the same time, apply it to the corner of the column to make a cut.
Rotate it by 0 ° to complete the column cutting.

Then, one or both of the cut columns were moved slightly (about 10 to 20 mm) in the longitudinal axis direction to widen the cutting gap, and rotated by a driving device to the corner of the column end face of the opened gap. If the groove cutter is inserted and the ring plate is rotated 180 ° in the same manner, the cutter accurately guides the groove on the guide roller, that is, both end surfaces of the cut portion guided by the wall surface of the pipe. Then, the clamp is released and the cut product is carried out to the carry-out table side.

If necessary, carry the column to be machined into the machine body according to the next cutting dimension, continuously perform cutting and beveling, and repeat the above-mentioned machining steps until there are no columns placed on the inlet side carry-in table. You can

<Embodiment> (1) Apparatus FIG. 1 is a schematic front view of an embodiment of the cutting / beveling machine of the present invention, and FIG. 2 is a schematic side view thereof, in which 1 denotes a ring plate. The outer periphery thereof is supported by a plurality of rollers 2 axially supported by a support frame 3 from four directions and is rotatably supported around its central axis.

The ring plate 1 is driven by 180 ° forward and reverse rotation by meshing between a sector gear (not shown) provided on the outer periphery of the ring plate 1 and a pinion (not shown) pivotally supported by the ring plate support frame 3.

Further, the ring plate 1 is provided with a column insertion hole 5 in the axis of rotation, and a cross groove 6 communicating with the hole 5 and orthogonal to each other in the radial direction is provided, and both sides of the groove 6 are provided. A guide rail 7 composed of sliding surfaces parallel to each other is formed, and a pair of cutting cutter head 8 and groove cutter head 9 which are opposed to each other are fitted therein.

Therefore, the head is mounted so as to be slidable in the direction of the axis of rotation of the ring plate, that is, in the radial direction within the plane including the ring plate 1.

A head driving hydraulic mechanism 10 is mounted between the outer sides of the heads 8 and 9 in the radial direction and the outer peripheral edge side of the ring plate, and a pair of heads facing each other are controlled so as to approach or be separated from each other by the operation of each hydraulic mechanism 10. To be done.

In the radial direction of the heads 8 and 9 (direction of the rotation axis of the ring plate)
On the side, a drive shaft 12 that is interlocked with the output shaft of a prime mover 11, for example, a hydraulic motor or an electric motor, and that is parallel to the rotation axis of the ring plate.
However, each of them is axially supported, and a cutting cutter 13 or a groove cutter 14 is attached to the coaxial end portion.

In addition, if a large-capacity energy storage mechanism, such as a high-speed rotating flywheel, is set in conjunction with the output shaft of each prime mover 11, power can be extracted from the flywheel at the peak load on the cutter, and normal driving force The capacity can be set small.

Each of the above-mentioned cutters rotates in a plane parallel to the ring plate 1, and the same type of cutters are attached symmetrically with respect to the ring plate rotation axis, that is, at intervals of 180 °.

Therefore, the pair of cutters facing each other with the ring plate rotation axis as the center are symmetrically approached or separated in their respective rotation planes by the operation of the head driving hydraulic mechanism 10.

The ring plate support frame 3 is provided with a brake device 15 for stopping the rotation of the ring plate 1 around the rotation axis.

Guide rollers 16 having a rotary shaft parallel to the cutter drive shaft 12 are provided on both sides of each cutter at the inner tip of each head, and the peripheral surfaces of these rollers 16 contact the peripheral wall surface of the column to be processed. When contacted, the blade of the cutting cutter 13 is provided so as to extend slightly beyond the maximum wall thickness that can be cut and to extend inward of the roller peripheral surface, and the shape of the blade of the grooved cutter 14 is the column cutting end surface of the relevant portion. It is set to form a welding groove of the required size and angle.

FIG. 3 is an enlarged cross-sectional view of the groove cutter head portion taken along the line III-III in FIG. 1, in which 9 is a head body and 12
Is a cutter drive shaft axially supported by the head main body 9 by bearings 17 and 18, said shaft being mounted on the front side surface of the head main body 9 and provided with a gear mechanism 21 for an output shaft 19 such as a hydraulic motor or an electric motor. Drives the groove cutter 14 fixed to the shaft 12 during machining by interlocking with each other through.

Reference numeral 20 denotes a flywheel fixed to the output shaft, which is provided so as to rotate at high speed to store energy and discharge the energy corresponding to the peak load from the cutter.

However, if the power of the prime mover 11 is increased more than necessary,
This becomes unnecessary.

The blade form of the double-edge bevel cutter 14 is as shown in the figure.
It is a truncated mountain shape that is narrowed on the outer circumference, and its taper determines the angle of groove processing. The same cutter has a cutting edge on both side slopes 27, and the center line of the cutter 14 and the column 4 at the time of processing.
Match with the center of the cutting gap.

Reference numeral 16 denotes a guide roller, the rotation axis of which is provided in parallel with the drive shaft 12 of the groove cutter 14, and which is directed toward the inner tip of the head 9, that is, in the direction of the center axis of rotation of the ring plate.
The pair of grooved cutters 14 are pivotally supported so as to sandwich them.

The positional relationship between the cutting edge 27 of the grooved cutter 14 and the peripheral surface of the guide roller 16 is as described above, for example, when the peripheral surface of the guide roller 16 is in contact with the peripheral wall surface of the column, the cutter cutting edge 27 forms the column. It is set so that a welding groove having a predetermined amount and a predetermined angle can be formed with respect to the cut end surface.

Since the cutter cutter 14 has a thick cutter body, if the cutting gap of the column 4 is not widened, the cutter will not enter between them, so the column is slightly moved in the longitudinal axis direction before the groove processing, The cutting gap must be sized.

The head 9 is elastically pressed and urged in the column peripheral wall direction by a hydraulic mechanism 10 and comes into contact with the guide roller 16 so that the ring plate 1 rotates around its central axis. Since the guide roller 16 moves along (the hydraulic mechanism 10 moves in and out accordingly) and guides the head 9, the groove cutter 14 pivotally supported by the guide roller 16 also has a column peripheral wall shape. Along with this, the welding end face having a uniform shape and a small surface roughness is machined on the cut end face of the column.

That is, the hydraulic mechanism 10 is guided by the guide roller 16 to press the head 9 against the column peripheral wall, and in that state, the groove cutter 14 performs groove cutting on the column cutting end surface, so that the convex portion of the pipe peripheral wall is When the guide roller 16 is pushed up to retract the head 9 in the diametrical direction, the blade edge of the cutter 14 also retracts accordingly, and if the pipe wall is concave, the head 9 similarly moves in the ring plate rotation axis direction. It moves by projecting, and the relative positional relationship between the cutter blade edge and the column end surface does not change.

The detailed structure of the cutter head portion described above has been described by taking the double-edged grooved cutter head 9 as an object, and the operation when the cutting cutter 13 is attached instead of the double-edged grooved cutter 14 is also described. Almost the same description as above can be made.

The centering device 28 of the column 4 has a pair of at least symmetrically adjoining and separating the extension lines of the ring plate 1 on the inlet side and the outlet side of the center axis of rotation of the ring plate 1 in a direction perpendicular to the same line. It includes a claw 29, and corresponds to the claw 29, and comprises a column mounting table provided separately from the claw 29.

The above-mentioned centering device is provided with the center lines aligned on the column inlet side and the column outlet side of the cutting / beveling machine, respectively, and a pair of interlocking pawls are provided before the column 4 to be processed is placed on the carry-in table and sent to the machine. The both side walls of the column 4 are suppressed by 29, and at least the center axis of rotation of the ring plate and the center axis of the column length are aligned on the plan view.

At the same time, the ring plate 1 is slid / adjusted upward and downward according to the size of the column cross section, and at least the center of the pinch roller is interlocked to adjust the column cross section center axis and the ring plate rotation center axis. Match exactly.

Thus, the column 4 passes through the entrance side pinch roller 30 and the entrance side clamping device 31 and goes through the center hole of the ring plate of the machine,
After passing through the exit side clamp device and the exit side pinch roller, the both-sides clamp device enters the operable state.

As a result, it becomes possible to process under the same conditions regardless of whether the columns have different cross-sectional diameters.

However, if there is some disagreement in the overlap between the ring plate and column axis, it is unlikely that it will adversely affect the cutting and groove processing of the column. It is also impossible for the rim and the column to buffer.

Insert one end of the column into the center hole of the ring plate, extend the column 4 from the plane position including the cutting cutter to the machine exit side by the required length, measure the cutting length of the column 4, and then adjoin the ring plate 1. Clamp device 31 installed on the inlet side and the outlet side
Is operated to fix the column 4 on both sides of the cutting point so that the column 4 is not displaced during cutting and groove processing.

In addition, in the present embodiment, of the centering device of the column 4, the column mounting table of the centering device 28 is moved upward and downward to adjust the column 4 upward and downward, and the ring plate rotation center axis is used as a reference. It is not impossible to add a mechanism to adjust the central axis of the column on the mounting table to match it.

Thus, the clamp device 31 is removed from the processed column, and the product is transferred onto the carry-out table by the output side pinch roller.

(2) Operation The device having the above configuration is operated almost as described below. However, there are many points in the description that overlap with the items described in the above <Operation> section, so only a brief description will be given.

FIG. 4 shows a schematic side view of the steel pipe cutting / beveling machine of the present invention with a part cut away. In the figure, the cutting / beveling machine is located at the center and the steel pipe is contrasted in the inlet and outlet directions. Further, the clamp device 31, the pinch roller 30, the centering device 28, and the loading / unloading table are linearly installed in this order.

The column 4 of a required size is placed on the carry-in table and conveyed into the centering device 28, where the center of the column 4 is taken out by the pair of claws 29, and this is inserted into the ring plate through the pinch roller 30 and the clamp device 31. Pass it through the hole and extend it to the machine exit side.

The centers of the columns 4 in the upper and lower directions are aligned by displacing and adjusting the ring plate 1 or the pinch roller 30 up and down.

Since the cutting cutter position on the machine side is known in advance, the cutting length of the column 4 can be accurately grasped by measuring the length of the column in the direction of the delivery table, and the position of the end face of the column can be grasped. It is also possible to equip a detection sensor and automate the following series of cutting and beveling processing by the signal from the detection sensor only by using a conventionally known means.

After setting the column cutting length to a predetermined size, clamp the columns on both sides of the cutting point by the clamp devices 31 installed close to both sides of the ring plate 1 so that the column 4 is not displaced by cutting / beveling. Fix it.

Next, while driving the cutting cutter 13, the plungers of the hydraulic mechanism 10 of the pair of cutter heads 8 facing each other are extended inward (the ring plate rotation axis), and the cutters 13 are symmetrically applied from both sides of the column 4, The peripheral wall is cut until the guide roller comes into contact with the peripheral wall of the column.

In that state, if you rotate the ring plate 180 degrees forward,
The guide rollers 16 are guided along the four circumferential surfaces of the column, so that the cutting cutter 13 also cuts the wall surface along the sectional shape of the column and completely cuts the column 4.

That is, the power of the hydraulic mechanism 10 of the cutter head 8 is
It must be larger than the processing reaction force that the cutting cutter 13 receives, but smaller than the urging force of the guide roller 16 and the hydraulic mechanism 10.

The above-mentioned circumstances are the same as in the case of machining with the double-edged groove cutter 14.

After cutting the column 4 completely, thus the ring plate 1
At the end of 180 ° forward rotation, the hydraulic mechanism 10 is operated to return the cutter head 8 to the outer side in the radial direction, that is, the old position, and the cutting cutter 13 is separated from the column 4.

Next, one or both of the columns to be processed are slightly moved in the longitudinal direction of the steel pipe, the grooved cutter 14 is activated on the end face of the column, and the ring plate 1 is rotated 180 ° in that state to cut the column. As in the case of machining with a cutter, at the time when the groove machining on the end face of the column is completed, the machine as a whole returns to the old position, and one cycle of the operation is completed.

However, the above description of one cycle should properly include the treatment of the column after cutting the column and the transportation process.

For a detailed description of the cutting or beveling of the column 4 itself, refer to the section <Operation> and <Example> (1) Device description.

In the description of this embodiment, the processing machine and the operating method of the column having a large-diameter square-diameter cross section have been mainly described, but the means can naturally be applied to a large-diameter round steel pipe. Is.

(C) Effect of the Invention According to the machine and the operating method of the present invention, (1) once the conveyed work material is clamped and set, cutting is performed by one machine without releasing it, and Since the end face can be groove-processed, it is necessary to move a large-diameter workpiece each time, as in the conventional means.
Since it does not require time adjustments, clamps, etc.,
Good processing efficiency.

(2) The 180 ° rotation of the ring plate makes it possible to cut and groove steel pipes in a short time, which is efficient and requires a relatively small installation area for machinery and equipment. You may

(3) Since cutting and beveling are performed by different cutters, each driving power can be relatively small. Moreover, the initial investment may be small.

(4) Since the groove is processed by the cutter blade, the processing accuracy is good, and the surface finish roughness of the groove surface is also good, so that a high quality welded joint can be obtained.

(5) Both sides of the cut end surface of the steel pipe can be groove-processed at the same time,
Good processing efficiency.

(6) By automatically controlling the operation and sequence of the hydraulic mechanism and the like, it is possible to easily automate cutting of a predetermined size and groove processing.

And so on, it is possible to achieve special actions and effects that cannot be expected from conventional means.

[Brief description of drawings]

FIG. 1 is a schematic front view of an embodiment of the cutting and developing machine of the present invention,
Fig. 2 is a schematic side view thereof, and Fig. 3 is Fig. 1 III-III.
FIG. 4 is an enlarged cross-sectional view of the groove cutter head portion of the double blade along the line, and FIG. 4 is a schematic side view showing a part of the cutting / grooving machine. 1 ... Ring plate, 3 ... Ring plate support frame, 4 ... Column, 5 ... Column insertion hole (center hole), 7 ... Guide rail, 8 ... Cutting cutter head, 9 ... Groove cutter head, 10 …… hydraulic mechanism, 11 …… motor (hydraulic motor or electric motor), 12 …… cutter drive shaft, 13 …… cutting cutter, 14
...... Double edged bevel cutter, 15 …… Brake device, 16 …… Guide rollers, 17,18 …… Bearing, 19 …… Output shaft, 20-26 ……
Gear mechanism, 27 …… Cutter cutting blade, 28 …… Centering device, 29 …… Pawl, 30 …… Pinch roller, 31 …… Clamping device.

Claims (1)

(57) [Scope of utility model registration request] 1. A ring plate rotatably supported about the axis in a plane orthogonal to one axis, a mechanism for driving the ring plate at least 180 ° forward and reverse rotations, A pair of heads respectively held on the ring plate so as to be slidable in the diameter direction of the ring plate, mounted between the heads and the outer peripheral edge of the ring plate, and the pair of heads are opposed to each other and are separated from each other. A hydraulic mechanism for operating the heads, and a pair of pairs of heads, which are mounted on drive shafts axially supported in parallel with the center axis of rotation of the ring plate, on opposite sides of the head and are driven in a plane parallel to the plane of the ring plate. A cutting cutter, a groove cutter, and a guide roller that is provided at the tip of each head to which the cutter is attached and guides the head along the steel pipe peripheral wall surface when the ring plate contacts the steel pipe peripheral wall surface and rotates. It consists of a device for clamping a steel pipe moving in the longitudinal direction along the axis of rotation of the ring plate on the front side and rear side of the ring plate, and a means for slightly moving the clamping device in the axial direction relative to each other. A steel pipe cutting / grooving machine characterized by cutting a steel pipe with, and forming a welding groove on both cutting end faces.