JP2016064456A - Beveling device for steel pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable one device to bevel a front end and a rear end of two steel pipes conveyed one after the other without swiveling the steel pipes in a horizontal direction in a step of conveying the steel pipes in a longitudinal direction.SOLUTION: A beveling device for a steel pipe is provided in which a turning member 40 is provided in a support frame 12b provided in a conveyance path of the steel pipe. The turning member 40 is turnable around the axis of the steel pipe by a turning motor 44 and a drive gear 48. First cutter heads 50, 50 for beveling a front end and second cutter heads 50, 50 for beveling a rear end, which are movable in a radial direction with respect to the axis of the steel pipe, are provided on the front side and rear side of the turning member 40 respectively. Each cutter head 50 comprises a beveling cutter 60 and a copy roller 62. By turning the turning member 40, both front and rear ends of the steel pipes are beveled simultaneously with the beveling cutters 60 and the copy rollers 62.SELECTED DRAWING: Figure 3

Description

The present invention relates to a groove processing apparatus that sequentially conveys a steel pipe having a predetermined length and performs groove processing on a front end portion and a rear end portion of the steel pipe at the same time.

Steel pipes having a square cross section or a circular cross section that are relatively thick are called, for example, “square columns” or “circular columns” and widely used in construction. When the rectangular column or the circular column is extended and extended, “groove welding” is generally performed on the joint portion between the columns.

In order to perform this groove welding, it is necessary to form a predetermined groove surface in advance at the end of the column as shown in FIG. 9, and the groove surface uses a groove roller type groove processing device. To form.

In order to process the front end portion and the rear end portion of the steel pipe with a conventional groove processing apparatus, after processing the front end portion of the steel pipe, the front end portion and the rear end portion are switched by horizontally turning the steel pipe by 180 °. For this reason, in the case of a long steel pipe, a large space for horizontal swiveling was required at the work site. In addition, the long steel pipe is heavy, and there is a problem that the turning work is dangerous and takes time.

There is also an apparatus that performs groove processing on both front and rear ends of a steel pipe with a single apparatus without turning the steel pipe. For example, in the apparatus of Patent Document 1 (Japanese Patent Laid-Open No. 7-214414), the spindle of the cutter head is protruded forward and rearward (front side and rear side in the conveying direction of the steel pipe). And the 1st groove cutter is attached to the near side projection part, and the 2nd groove cutter is attached to the back side projection part.

Japanese Patent Laid-Open No. 7-21412

The apparatus described in the above document performs groove processing on the front end portion with a first groove cutter while copying the outer peripheral surface of the front end portion of the steel pipe with a first copying roller. Further, the rear end portion outer peripheral surface of the steel pipe is grooved by the second groove cutter while following the second copying roller. However, since the first groove cutter and the second groove cutter are attached to the same spindle, when the outer peripheral surface of the rear end portion of the steel pipe is grooved with the second groove cutter, The front end of the next steel pipe cannot be grooved with one groove cutter.

On the contrary, when the front end portion of the next steel pipe is grooved with the first groove cutter, the rear end portion of the steel pipe sent first is grooved with the second groove cutter. Can not. That is, the first and second groove cutters cannot be used at the same time, and one of them is in an idle state. Therefore, the reversing work by horizontal turning of the steel pipe can be made unnecessary, but there is a problem in the efficiency of the groove working itself.

Therefore, installing two groove processing devices side by side for the front end and the rear end of the steel pipe eliminates the need for reversing the steel pipe and improves the efficiency of the groove processing, but reduces the equipment cost and installation space for the two. There is a problem that it takes.

The present invention has been made to solve such problems, and it is not necessary to swivel the steel pipe, and the first groove cutter on the front side and the second groove cutter on the rear side can be simultaneously performed with one device. The purpose is to improve the efficiency of groove processing, reduce the equipment cost, and reduce the installation space.

In order to solve the above-mentioned problems, the present invention provides a groove cutter to change the shape of the outer peripheral surface of the steel pipe while turning the scanning roller abutting on the outer peripheral surface of the steel pipe around the axis of the steel pipe. A groove processing device for a steel pipe that performs groove processing of an end of a steel pipe with the groove cutter, and a support frame disposed in a transverse direction of a conveyance path for conveying the steel pipe in a longitudinal direction, and the support A pivot member supported by a frame and rotatable about the axis of the steel pipe, and a pivot member disposed on the front side in the transport direction of the steel pipe and movable in the radial direction with respect to the axis of the steel pipe A first cutter head for front end groove processing, and a rear end groove processing that is disposed on the rotating member on the rear side in the conveying direction of the steel pipe and is movable in the radial direction with respect to the axis of the steel pipe Second cutter head, and the first and second cutters Tsu and groove cutter and profiling roller disposed respectively de, a groove processing apparatus of the steel pipe provided with the.

In the present invention, a first cutter head having a groove cutter and a copying roller is arranged on the front side in the conveying direction of one rotating member, and a second cutter head having a groove cutter and a copying roller on the rear side. Since it is disposed in the opposite direction, the front end of the steel pipe on the front side in the conveying direction is processed by the groove cutter of the first cutter head, and at the same time, the rear end of the steel pipe on the rear side in the conveying direction is opened by the second cutter head. Can be processed with a tip cutter. Accordingly, the front end portion and the rear end portion of the two steel pipes that follow each other in the conveying direction can be simultaneously grooved with one apparatus without turning the steel pipe in the horizontal direction. Therefore, it is possible to improve the efficiency of the groove processing, reduce the equipment cost, and reduce the installation space all at once.

It is the perspective view which looked at the groove processing apparatus which concerns on embodiment of this invention from the steel pipe carrying-in side. It is the longitudinal cross-sectional perspective view which looked at the groove processing apparatus which concerns on embodiment of this invention from the steel pipe carrying-in side. It is the perspective view which looked at the groove processing apparatus which concerns on embodiment of this invention from the steel pipe carrying-out side. It is the longitudinal cross-sectional perspective view which looked at the groove processing apparatus which concerns on embodiment of this invention from the steel pipe carrying-out side. The groove processing apparatus which concerns on embodiment of this invention is shown, (1) is a steel pipe carrying-out side sectional drawing (AA arrow sectional drawing of (4)), (2) is a steel pipe carrying-out front view, (3) is a plan view, (4) is a side view, (5) is a steel pipe carry-in side cross-sectional view (cross-sectional view taken along line BB in (4)), and (6) is a steel pipe carry-in side front view. It is a figure which shows the state which a cutter head turns around a steel pipe. The groove cutter and the copying roller are shown, wherein (1) is a front view and (2) is a plan view. It shows the time of processing the front end of the steel pipe, (1) is a cross-sectional view taken along the line DD of (2), (2) is a cross-sectional view taken along the line, and (3) is a cross-sectional view taken along the line CC of (2). It is sectional drawing. The rear end positioning state of the 1st steel pipe and the carrying-in state of the 2nd steel pipe are shown, (1) is a FF line arrow sectional view of (2), (2) is a center sectional view, (3) FIG. 2 is a cross-sectional view taken along line EE of (2). It shows the time of simultaneous machining of the rear end portion of the first steel pipe and the front end portion of the second steel pipe, (1) is a cross-sectional view taken along line KK in (2), (2) is a central cross-sectional view, (3) is a cross-sectional view taken along line GG in (2), and (4) is a cross-sectional view taken along line HH in (2). It is an edge part perspective view of the steel pipe which completed groove processing.

(Overall configuration of groove processing equipment)
A steel pipe groove processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. 1A and 1B are perspective views of the groove processing apparatus 100 as viewed from the carry-in side. FIG. 1B shows the left half of the groove processing apparatus 100 of FIG. 1A cut out. FIG. 1B shows the parts that are not visible in FIG. 1A.

2A and 2B are perspective views of the groove processing apparatus 100 as viewed from the carry-out side. FIG. 2B shows the right half of the groove processing apparatus 100 of FIG. 2A cut out. FIG. 2B shows a portion not visible in FIG. 2A. FIG. 3 is a view of the groove processing apparatus 100 as viewed from above, side, and front and rear directions. With respect to this groove processing apparatus 100, the steel pipe which carries out groove processing is carried in / out in the direction of the arrow shown in the figure.

As shown in FIGS. 1A to 3, the groove processing apparatus 100 includes a base member 10 installed on the floor surface. The base member 10 is composed of a carry-in base portion 10a, a central base portion 10b, and a carry-out base portion 10c. These three base portions 10a, 10b, and 10c are integrated by welding or bolt joining. Yes.

On the three base portions 10a, 10b, and 10c, gate-shaped support frames 12a, 12b, and 12c are respectively disposed so as to cross the loading / unloading direction of the steel pipe.

The front and rear portal support frames 12a and 12c have vertical cylinders 14a and 14c for clamping the steel pipe in the vertical direction. Rod portions of the vertical cylinders 14a and 14c extend downward, and clamp members 16a and 16c are attached to lower ends thereof.

Roller conveyors 18a and 18c are disposed at the center of the upper surfaces of the front and rear base portions 10a and 10c. Further, as will be described later, a roller conveyor 18b is disposed inside the rotating member 40 in the central base portion 10b. The heights of the front and rear roller conveyors 18a and 18c are fixed, but the height of the central roller conveyor 18b can be changed by a lifting plate 30 described later. A steel pipe is placed on these roller conveyors 18a, 18b, 18c, and is conveyed in the direction of the arrow shown in the figure.

In FIG. 1B, FIG. 2B, FIG. 3 and FIG. 7, the central roller conveyor 18b and the front and rear roller conveyors 18a, 18c are shown at the same height. 6 and 8, the central roller conveyor 18b is shown at a lower height than the front and rear roller conveyors 18a and 18c in order to represent the position when the rotating member 40 rotates around the steel pipe. . When transporting a steel pipe to shift from the front end groove processing of the steel pipe to the rear end groove processing, the central roller conveyor 18b is replaced with the front and rear roller conveyors as shown in FIGS. 1B, 2B, 3, and 7. Raise to the same height as 18a, 18c.

A pair of left and right horizontal clamp members 20a and 20c are disposed so as to be slidable in the left-right direction with the carry-in and carry-out roller conveyors 18a and 18c interposed therebetween. These horizontal clamp members 20a and 20c are for fixing the steel pipe in a state of being sandwiched from the left and right directions, and have a centering function so as to approach and separate from each other symmetrically.

The horizontal clamp members 20a and 20c are configured to reciprocate by expansion and contraction operations of horizontal cylinders 22a and 22c disposed on the portal support frames 12a and 12c. The vertical cylinders 14a and 14c and the clamp members 16a and 16c are arranged above the centering reference position of the horizontal clamp members 20a and 20c in the vertical direction.

A rectangular lifting plate 30 is disposed so as to be movable up and down along the pillar portion of the gate-shaped support frame 12b of the central base portion 10b. The elevating plate 30 is disposed on the front side of the column portion.

Guided portions 30a having concave grooves are fixed at four positions on the rear surface of the elevating plate 30 so as to face the pillar portions of the portal support frame 12b. These four guided portions 30a are slidably engaged with vertical guide rails 32 disposed on the front surface of the column portion of the portal frame 12b.

A vertical cylinder 34 is disposed on the front side of the pillar portion of the portal support frame 12b. The cylinder portion of the vertical cylinder 34 is connected to the central base portion 10 b, and the rod portion of the vertical cylinder 34 is connected to protrusions 30 b formed at the left and right ends of the lifting plate 30. The elevating plate 30 is moved up and down along the guide rail 32 by the expansion and contraction operation of the rod portion of the vertical cylinder 34.

A circular opening 30 c is formed at the center of the elevating plate 30. The cylindrical portion 40a of the rotation member 40 is inserted into the opening 30c with a gap so as to be rotatable.

On the outer periphery of the front end of the cylindrical portion 40a of the rotating member 40, a ring portion 40c and a ring gear portion 40b (not shown in the outer peripheral tooth portion) are provided in parallel at a predetermined interval.

On the other hand, free rollers 42 are arranged at four positions on the front and rear sides of the lifting plate 30. These four free rollers 42 have a guide groove 42a having the same width as the ring portion 40c in order to guide the ring portion 40c.

The rotating member 40 is rotatably supported by these four free rollers 42. As a result, the entire rotation member 40 can be rotated around the center of the circular opening 30c with the cylindrical portion 40a inserted into the opening 30c of the elevating plate 30.

A rotating motor 44 and a reduction gear box 46 are disposed on one side of the upper part of the lifting plate 30. The reduction gear box 46 is provided with a drive gear 48 (not shown in the outer peripheral teeth). The rotation of the rotation motor 44 is decelerated and transmitted to the drive gear 48.

The drive gear 48 of the reduction gear box 46 is engaged with the ring gear portion 40 b of the rotating member 40. As the drive gear 48 rotates, the rotating member 40 rotates while being supported by the free roller 42. As a drive mechanism of the rotating member 40, a combination of a ring gear portion 40b and a drive gear 48, or a combination of a chain and a sprocket can be used.

A pair of parallel plate portions 40e that are longer than the cylindrical portion 40a by a predetermined dimension are disposed on the inner side near the front end of the cylindrical portion 40a with the diaphragm portion 40d interposed therebetween. The roller conveyor 18b is disposed on the lower parallel plate portion 40e. Parallel rails 52 are fixed to the four front and rear end portions of the parallel plate portion 40e in symmetrical positions.

(Cutter head configuration)
Each cutter head 50 is slidably supported on the parallel rail 52. The cutter head 50 is disposed on the carry-in side and the carry-out side of the rotating member 40 in the opposite direction with the same configuration and the same phase. That is, the carry-in side is the first cutter head 50, and the carry-out side is the second cutter head 50.

A cutter head pressing cylinder 54 is disposed on the side of the parallel rail 52. The cylinder portion of the cutter head pressing cylinder 54 is connected to the parallel plate portion 40 e, and the rod portion of the cutter head pressing cylinder 54 is connected to the cutter head 50. The pair of cutter heads 50 are configured to approach and separate in the radial direction of the rotating member 40 by the expansion and contraction operation of the rod portion of the cutter head pressing cylinder 54.

In the pair of cutter heads 50, a groove cutter 60 and a copying roller 62 for groove processing are arranged coaxially. Specifically, as shown in FIG. 5, a copying roller 62 is rotatably attached to the distal end side of the rotation shaft 60 a of the groove cutter 60. The tip of the rotary shaft 60 a is loosely coupled to a bracket 56 that is fixed to the cutter head 50.

The base end side of the rotary shaft 60a of the groove cutter 60 is connected to a cutter driving motor 64 attached to the cutter head 50 via a reduction mechanism (not shown).

The outer diameter of the copying roller 62 is slightly larger than the tip diameter of the groove cutter 60. The groove cutter 60 performs a predetermined groove processing on the tip of the square steel pipe P by the outer periphery of the copying roller 62 rolling on the outer periphery of the end of the steel pipe P.

(Beveling process)
Next, with reference to FIGS. 5-8, the process of groove-working the steel pipe P with the groove processing apparatus 100 is demonstrated. 5 to 8, a square steel pipe P is shown as the steel pipe P, but a groove can be formed in the same process even with the circular steel pipe P.

(Beveling of the front end of the steel pipe)
FIG. 6 shows the groove processing of the front end portion of the steel pipe P. First, the height of the lifting plate 30 is adjusted in FIG. Since the turning member 40 is rotated around the axis of the steel pipe P during the groove processing of the steel pipe P, it is necessary to match the center height of the turning member 40 with the axis height of the steel pipe P. The height of the lift plate 30 is adjusted by extending and contracting the rod portions of the left and right vertical cylinders 34.

At this time, the rotation phase of the rotation member 40 is in the initial phase. In this initial phase, the rod portion of the cutter head pressing cylinder 54 is extended and the mutual distance between the pair of cutter heads 50 is maximized.

Next, the front end portion of the steel pipe P is positioned on the carry-in side of the groove processing apparatus 100. The groove processing apparatus 100 is provided with an abutting portion (not shown) on the base portion 10a together with a projecting and retracting means such as a cylinder, and the front end portion of the steel pipe P is abutted against the abutting portion. This determines the position of the steel pipe P in the front-rear direction. In this state, the vertical cylinder 14a and the pair of left and right horizontal cylinders 22a are operated to close the clamp member 16a and the clamp member 20a, and retract the abutting portion.

When the steel pipe P is fixed in this manner, the cutter driving motor 64 is rotated, and at the same time, the rod portion of the cutter head pressing cylinder 54 is shortened. As a result, the pair of cutter heads 50 approach each other, and the cutting edge portion of the rotating groove cutter 60 comes into contact with the front end portion of the steel pipe P and starts cutting.

When the groove cutter 60 cuts one portion of the front end portion of the steel pipe P and the copying roller 62 comes into contact with the outer peripheral surface of the front end portion of the steel pipe P, the cutter head 50 does not enter any more, but enters the cutter head pressing cylinder 54. Apply hydraulic pressure in the shortening direction.

In this manner, with the copying roller 62 in contact with the outer peripheral surface of the front end portion of the steel pipe P at a constant pressure, the rotating motor 44 is rotated while the groove cutter 60 is rotated by the cutter driving motor 64. By turning the moving member 40, groove processing is performed on the entire circumference of the steel pipe.

When the rotating member 40 rotates, the groove cutter 60 processes the front end portion of the steel pipe P into a predetermined shape while the copying roller 62 follows the outer peripheral surface of the steel pipe P front end portion. The groove processing is completed when the cutter head 50 turns around the steel pipe P by 180 degrees.

FIG. 9 shows an end portion of the square steel pipe P that has been subjected to the groove processing. It can be seen that a predetermined groove processing is applied to the end of the steel pipe P.

(Forward feed of steel pipe)
When the turning member 40 is turned 180 degrees and the groove processing of the front end portion of the steel pipe P is completed, the rod portion of the cutter head pressing cylinder 54 is extended to separate the pair of cutter heads 50 from each other. The rotational phase of 40 is returned to the initial phase. Next, the vertical cylinder 34 of the elevating plate 30 is extended so that the central roller conveyor 18b is flush with the front and rear roller conveyors 18a and 18c. Subsequently, the vertical and horizontal cylinders 14a and 22a are shortened to release the clamp of the steel pipe P, and the steel pipe P is fed forward in the direction of the arrow in FIG.

When the rear end portion of the steel pipe P passes through the cutter head 50 on the carry-out side, the forward feeding of the steel pipe P is temporarily stopped. And after making the rear end butting part which is arrange | positioned in the base part 10c project, the said steel pipe P is moved in the return direction.

With this return, the rear end portion of the steel pipe P is abutted against the abutting portion, whereby the position of the rear end portion of the steel pipe P in the front-rear direction is determined. The position of the steel pipe P in FIG. 7 shows the state positioned in this way. In this state, the vertical cylinder 14c on the carry-out side and the horizontal cylinder 22c are extended to fix the rear end of the steel pipe.

(Simultaneous groove processing of front and rear ends of steel pipe)
Next, the second steel pipe P is positioned in the same manner as described above on the carry-in side of the groove processing apparatus. When the positioning of the rear end portion of the first steel pipe P and the front end portion of the second steel pipe P is completed, the front and rear left and right four cutter driving motors 64 are driven to rotate the front and rear left and right four groove cutters 60, respectively.

Then, in the same manner as the groove processing of the front end portion of the steel pipe, the rod portion of the cutter head pressing cylinder 54 is shortened, and the cutting edge portion of the rotating groove cutter 60 is brought into contact with the end portion of the steel pipe P for cutting. Then, the copying roller 62 is brought into contact with the outer peripheral surface of the end portion of the steel pipe P with a constant pressure.

In this state, the rotation motor 44 is driven to rotate the rotation member 40. The state at this time is shown in FIG. When the rotating member 40 rotates, the two scanning rollers 62 on the carry-out side follow the outer peripheral surface of the rear end portion of the first steel pipe P, and the two groove cutters 60 move the rear end portion of the steel pipe P to the predetermined end. Groove into shape.

At the same time, the two groove cutters 60 groove the front end of the steel pipe P into a predetermined shape while the two copying rollers 62 on the carry-in side follow the outer peripheral surface of the front end of the second steel pipe P. When the pair of front and rear cutter heads 50 turn around the steel pipe P by 180 degrees, the rear end groove processing and the front end groove processing of the two front and rear steel pipes P are completed simultaneously.

That is, by rotating (semi-rotating) one rotation member 40, a total of four cutter heads 50 on the carry-in side and the carry-out side are simultaneously turned, and the front end portion and the rear end portion of the steel pipe P are grooved. Can be done simultaneously.

When the groove processing of the rear end portion and the front end portion of the steel pipe P is completed, the rod portion of the cutter head pressing cylinder 54 is extended to separate the pair of cutter heads 50 from each other. Returning to the initial state, the two steel pipes P are transported in the unloading direction.

Thereafter, the rear end of the second steel pipe P is positioned in the same manner as the positioning of the rear end of the first steel pipe P. Further, the third steel pipe (not shown) is positioned in the same manner as the positioning of the front end portion of the second steel pipe P. Similarly, the rear end groove processing of the second steel pipe P and the front end groove processing of the third steel pipe are simultaneously performed. By repeating the above steps, the steel pipe can be grooved one after another.

As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, in the above-described embodiment, the cutter head 50 is disposed in a pair and the groove processing is performed by turning the cutter head 50 by 180 degrees. However, the cutter head 50 is not necessarily disposed in a pair. Only one cutter head 50 may be provided on each of the carry-in side and the carry-out side, and the groove processing may be performed by turning the rotary member 40 or the cutter head 50 360 degrees.

In the embodiment, the lifting plate 30 and the cutter head 50 are pressed by the cylinder, but these can be driven by a motor and a screw.

In the above embodiment, the height of the rotating member 40 can be adjusted using the lifting plate 30. However, the lifting plate 30 can be used by adjusting the height of the front and rear roller conveyors 18a and 18c. Alternatively, a configuration in which the rotation member 40 is rotated at a constant height is also possible. In addition, by making the heights of the front and rear roller conveyors 18a and 18c adjustable independently, it is possible to simultaneously groove the front and rear ends of the front and rear steel pipes P having different diameters.

DESCRIPTION OF SYMBOLS 10: Base member 10a: Carry-in side base part 10b: Center base part 10c: Carry-out side base part 12a-12c: Portal-type support frame 14a, 14c: Vertical cylinder 16a, 16c: Clamp member 18a-18c: Roller conveyor 20a: Horizontal Clamp members 22a and 22c: Horizontal cylinder 30: Elevating plate 30a: Guided portion 30b: Protruding portion 30c: Opening portion 32: Guide rail 34: Vertical cylinder 40: Rotating member 40a: Cylindrical portion 40b: Ring gear portion 40c: Ring portion 42: Free roller 42a: Guide groove 44: Rotating motor 46: Reduction gear box 48: Drive gear 50: Cutter head 52: Parallel rail 54: Cutter head pressing cylinder 56: Bracket 60: Cutter 60a: Rotating shaft 62: Copying Roller 64: For driving the cutter Over data 100: beveling apparatus P: steel pipe

Claims (3)

The copying roller in contact with the outer peripheral surface of the end of the steel pipe is turned around the axis of the steel pipe while the shape change of the outer peripheral surface of the end of the steel pipe is transmitted to the groove cutter, and the end of the steel pipe is transmitted with the groove cutter. A steel pipe groove processing apparatus for performing the groove processing of
A support frame disposed in a conveyance path for conveying the steel pipe in the longitudinal direction;
A rotating member supported by the support frame and rotatable about the axis of the steel pipe;
A first cutter head for front end groove processing that is disposed on the rotating member on the front side in the conveying direction of the steel pipe and is movable in a radial direction with respect to the axis of the steel pipe;
A second cutter head for rear end groove processing that is disposed on the rotating member on the rear side in the conveying direction of the steel pipe and is movable in a radial direction with respect to the axis of the steel pipe;
A groove cutter and a copying roller respectively disposed on the first and second cutter heads;
A steel pipe groove processing apparatus.   A lifting member supported by the support frame and capable of moving up and down; and the rotating member disposed to be rotatable with respect to the lifting member. The lifting member is moved up and down to turn the rotating member. The groove processing apparatus according to claim 1, wherein the center is aligned with the axis of the steel pipe.   The groove processing apparatus according to claim 1 or 2, wherein the first and second cutter heads are arranged in a pair in a radial direction of the rotating member.

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