JPH10217022A - Square pipe grooving machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a installation space for a cutter moving mechanism small, shorten grooving time and ease the moving control of a grooving cutter. SOLUTION: A square pipe grooving machine for grooving the tip face of a square pipe (w) for welding has the same number of grooving cutters 31, 32, 33, and 34 as the number of the sides of the tip face of the square pipe (w) and cutter moving mechanisms 40, 50, 60 and 70 for moving the grooving cutters 31, 32, 33, and 34 copying each side of the square pipe (w). That is, this constitution has only to move support frame for the grooving cutters 31, 32, 33, and 34 along the sides of the square pipe (w), eliminating the necessity of approaching and retracting of the cutters from the sides of the square pipe (w).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a square pipe beveling machine for forming a groove for welding on the end face of a square pipe.

[0002]

2. Description of the Related Art A conventional groove processing machine related to this is described in Japanese Patent Application Laid-Open No. Hei 7-214413, and a schematic diagram thereof is shown in FIG. The beveling machine 1 is a machine for processing a bevel for welding on the end face of a square pipe w,
A support mechanism (not shown) for holding a rectangular pipe w as a work at a predetermined position parallel (horizontally) to the Z axis is provided. In addition, the groove processing machine 1 includes an apparatus gantry 3 manufactured to have a shape surrounding the end face of the square pipe w, and a pair of X-axis rails 5 are fixed to upper and lower side surfaces of the apparatus gantry 3. The first traversing platform 6a and the second traversing platform 6b are engaged with the X-axis rail 5 so as to move along the X-axis rail 5. Further, a first traversing cylinder 6c and a second traversing cylinder 6c for moving the first traversing platform 6a and the second traversing platform 6b in the X-axis direction are respectively provided on the device platform 3.
A traversing cylinder 6d is mounted.

[0003] The first traverse mount 6a and the second traverse mount 6b
Y-axis rails 7 are vertically fixed to the side surfaces opposite to each other. The first lifting frame 8a and the second lifting frame 8b are engaged with the Y-axis rail 7 of the first horizontal frame 6a and the Y-axis rail 7 of the second horizontal frame 6b, respectively, so as to be able to move up and down. Further, a first lifting / lowering cylinder 8c used for lifting / lowering the first lifting / lowering platform 8a is attached to the first traversing platform 6a, and a second lifting / lowering platform 8b is mounted on the second traversing platform 6b.
A second elevating cylinder 8d used for elevating and lowering is mounted. Further, a first cutter 4a and a second cutter 4b for processing a groove of the square pipe w are respectively mounted at predetermined positions on the first lifting frame 8a and the second lifting frame 8b.

[0004] In order to machine the groove at the end face of the square pipe w with the beveling machine 1, the first traverse base 6a or the first elevating base 8a is moved while rotating the first cutter 4a. The first cutter 4a is moved along the upper side and the right side of the end face of the square pipe w. At the same time, while rotating the second cutter 4b, the second traverse base 6b or the second
By moving the lifting frame 8b, the second cutter 4b is moved along the left side and lower side of the distal end surface of the square pipe w. Thereby, the groove processing can be performed over the entire circumference of the distal end surface of the square pipe w.

[0005]

However, in the above-mentioned beveling machine 1, when performing the beveling on the right side and the left side of the square pipe w, the first traverse base 6a is moved to the rightmost position and the second traverse is performed. It is necessary to hold the gantry 6b at the leftmost position. Further, when performing the groove processing of the upper side and the lower side of the square pipe w, the first cutter 4a, the second cutter 4b
The first traversing platform 6a and the second cutter 4b must be moved from the end to the center while maintaining the height at a predetermined height. That is, a space is required on both sides of the square pipe w for moving the first traverse base 6a and the second cutter 4b by a length substantially equal to the width of the square pipe w. For this reason, there is a problem that the groove processing machine 1 becomes large. Further, since the four sides of the square pipe w are groove-processed by the two cutters 4a and 4b, the processing time becomes long.

An object of the present invention is to reduce the size of a groove processing machine and improve the processing speed. A second aspect of the present invention, in addition to the object of the first aspect, aims to make it possible to combine the drive sources for moving the respective cutters into one unit and to further reduce the beveling machine. Things. A third aspect of the present invention is directed to, in addition to the object of the first aspect, to make it possible to combine the rotation sources for rotating the respective cutters into one unit, and to further reduce the beveling machine. Things.

[0007]

The above-mentioned object is achieved by a square pipe beveling machine having the following features. That is, in the square pipe beveling machine described in claim 1, a square pipe beveling machine for processing a groove for welding on the front end surface of the square pipe, It has a number of groove processing cutters equal in number and a cutter moving mechanism for moving the groove processing cutter along each side of the square pipe. According to the first aspect of the present invention, the groove processing cutters are provided by the number of sides of the end face of the square pipe. May be linearly moved in accordance with each side of the front end surface. That is, it is only necessary to move the support base of the groove processing cutter along the side of the square pipe, and it is not necessary to approach or separate from the side of the square pipe as in the related art. For this reason, the installation space of the cutter moving mechanism can be made compact. Further, since all sides of the end face of the square pipe can be processed at the same time, the processing time of the groove processing is reduced. Further, since each groove processing cutter only moves linearly following one side of the square pipe, movement control of the groove processing cutter is also facilitated.

[0008] In a square pipe beveling machine according to a second aspect of the present invention, in the square pipe beveling machine according to the first aspect, the cutter moving mechanism utilizes the action of a ball screw and a nut. The grooved cutter is moved, and the ball screws for moving the grooved cutters are connected to each other so that rotation can be transmitted. According to the second aspect of the present invention, since the ball screws of the cutter moving mechanism are connected to each other so as to be able to transmit rotation, all the ball screws can be rotated by one drive source. That is, each bevel processing cutter can be moved along each side of the square pipe by one drive source. Therefore, the cutter moving mechanism can be made more compact.

[0009] A grooved machine for square pipes according to a third aspect of the present invention is the same as the grooved machine for square pipes according to the first aspect, wherein the grooved cutter moves integrally with a groove-forming cutter. A rotating body for a cutter that transmits a rotating force to a processing cutter, a rotating source positioned at a fixed position, and a rotating source provided between the rotating source and the rotating body for the cutter, and between each rotating body for the cutter. And a link that supports the cutter rotator and the intermediate rotator and that bends in an articulated manner at the position of the rotator, the end of which is positioned at the position of the rotation source. Mechanism, transmitting the rotational force of the rotation source to the rotating body for the cutter via the intermediate rotating body, and further transmitting the rotating force of the rotating body for the cutter to another rotating body for the cutter via another intermediate rotating body. Transmission member According to the invention described in claim 3,
The torque of the rotation source is transmitted to the intermediate rotator by the transmission member, and is transmitted from the intermediate rotator to the cutter rotator. In addition, the rotational force of the cutter rotator is transmitted from another intermediate rotator to another cutter rotator. In other words, each cutter rotating body can be rotated by one rotating source. In addition, since each of the cutter rotating body and the intermediate rotating body is mounted on the joint portion of the link mechanism, the linear distance between the cutter rotating bodies, that is, the linear distance between the groove processing cutters can be freely changed. be able to. Therefore, when the groove processing cutter moves along each side of the square pipe, the link mechanism, the transmission member and the like do not hinder the movement of the groove processing cutter and the like. Furthermore, even if the linear distance between the rotating bodies for the cutter changes, the distance between the rotating body for the cutter and the intermediate rotating body is kept constant, so that the transmitting member can transmit the rotational force well.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A groove forming machine for a square pipe according to a first embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 1 is a drawing showing a main part of a grooved beveling machine for a square pipe according to the present embodiment, and is a view taken in the direction of arrow II in FIG. FIG. 2 is a view taken in the direction of arrows II-II in FIG. 1, and FIG. 3 is an overall side view of a square pipe beveling machine according to the present embodiment. The width direction of the groove processing machine for a square pipe will be described as the X-axis direction, the height direction will be the Y-axis direction, and the feed direction of the square pipe as a workpiece will be described as the Z-axis direction. The square pipe beveling machine 10 is a machine for processing a bevel wk for welding on the front end surface of a square pipe w (see FIG. 4), and as shown in FIG. And a carry-out section 14 for carrying out the grooved pipe 20 from the groove processing section 20 for carrying the square pipe w after the groove processing is completed.

The loading section 12 is installed in front of the groove processing section 20, and includes a transport platform 12k and the transport platform 12k.
and a plurality of feed rollers 12r installed on the first roller k. The feed rollers 12r are positioned in the Z-axis direction with an interval enough to vertically transport the shortest square pipe w, and side rollers 12s for guiding the square pipe w are provided on both sides of the feed rollers 12r. Have been. Thereby, the square pipe w is transported to the groove processing unit 20 while being held parallel to the Z axis.

A clamp cylinder 12y for pressing the square pipe w from above is provided right above the feed roller 12r located immediately adjacent to the groove processing section 20. When the clamp cylinder 12y operates, the square pipe w is clamped between the pressing piece 12p of the clamp cylinder 12y and the feed roller 12r. The unloading section 14 is installed behind the groove processing section 20, and the transport gantry 14 k
It has a plurality of transport rollers 14r and side rollers 14s installed above.

A stopper 15 for positioning the tip end surface of the square pipe w conveyed by the feed roller 12r of the carry-in section 12 in the Z-axis direction is provided on the front surface of the groove processing section 20. The stopper 1
5, as shown in FIG. 2, a side L-shaped contact piece 15 s that comes into contact with the distal end face of the square pipe w, and the contact piece 15 s
And a raising / lowering cylinder 15y which raises / lowers the cylinder between a stopper position and a standby position.

The beveling portion 20 is a portion for simultaneously beveling each side of the tip end surface of the square pipe w, and as shown in FIGS. Tool support plate 22 is provided. The tool support plate 22 includes a front plate 22f and a pair of side plates 22s, and a square opening 22h through which a square pipe w is passed is formed substantially at the center of the front plate 22f. Inside the front plate 22f, as shown in FIG. 1, four sets of cutter moving mechanisms 40 for moving four beveling cutters 31, 32, 33, and 34 in the X and Y axis directions, respectively. 50, 60,
70 are installed.

When the first cutter moving mechanism 40 operates, the first groove processing cutter 31 moves the square opening 22h.
Can move to the left and right (X-axis direction) following the lower side, and bevel the lower side of the end face of the square pipe w. The second groove processing cutter 32 moves up and down (Y) following the left side of the rectangular opening 22h by the operation of the second cutter moving mechanism 50.
(Axial direction), and beveling the left side of the tip surface of the square pipe w. Further, by operating the third cutter moving mechanism 60, the third groove processing cutter 33 can move left and right (X-axis direction) following the upper side of the rectangular opening 22h,
The upper edge of the end face of the square pipe w is grooved. Further, the fourth groove processing cutter 34 has a fourth cutter moving mechanism 70.
Is operated to move up and down (Y-axis direction) following the right side of the rectangular opening 22h, and the right side of the tip surface of the square pipe w is grooved. That is, the first cutter moving mechanism 4
0, the second cutter moving mechanism 50, the third cutter moving mechanism 60, and the fourth cutter moving mechanism 70 operate simultaneously, so that the four sides of the square opening 22h are filled with the second groove processing cutter 32, the fourth groove. The processing cutter 34 is up and down,
The first beveling cutter 31 and the third beveling cutter 33 move left and right to bevel the four sides of the tip surface of the square pipe w.

Here, the first cutter moving mechanism 40 and the fourth
The cutter moving mechanism 70 has the same structure, and the second
Since the cutter moving mechanism 50 and the third cutter moving mechanism 60 have the same structure, the first cutter moving mechanism 40 and the third cutter moving mechanism 60 will be representatively described. In addition,
FIG. 2 shows side surfaces of the first cutter moving mechanism 40 and the third cutter moving mechanism 60, and the second cutter moving mechanism 5
0 and the fourth cutter moving mechanism 70 are omitted. The first cutter moving mechanism 40 includes an elongated substantially square base block 4.
2 (see FIG. 1), the base block 42 of which is fixed to the back surface of the front plate 22f along the lower side of the rectangular opening 22h. In addition, while holding ball screws 44 at both ends of the base block 42 in parallel with the X axis,
A bearing 43 for rotatably supporting the ball screw 44 is fixed. FIG. 1 shows the bearing 4 on the right side.
Only 3 is shown, and the bearing 43 on the left is omitted.

Further, a servo motor 44m for rotating the ball screw 44 and an encoder (not shown) for measuring the rotation angle of the ball screw 44 are attached to the basic block 42. As shown in FIG. 2, an X-axis rail 45 is fixed to the upper surface of the base block 42, and a slider 45s can slide on the X-axis rail 45 in the X-axis direction. Is engaged. Further, the first cutter block 4 for supporting the first groove processing cutter 31 is provided on the slider 45s.
6 is fixed.

A nut 46n is fixed at a predetermined position on the first cutter block 46 (see FIG. 2).
The ball screw 44 is screwed to the nut 46n. Therefore, when the ball screw 44 is rotated by a predetermined angle by the servo motor 44m, the first
The cutter block 46 moves by a predetermined distance following the X-axis rail 45 by the action of a ball screw and a nut. A bearing 46j is formed in the first cutter block 46 in parallel with the Z axis, and a cutter rotating shaft 47 is rotatably supported by the bearing 46j. Further, a cutter holder 47h for clamping the first groove processing cutter 31 is attached to the tip of the cutter rotating shaft 47. A pulley 47p is fixed to a base end of the cutter rotating shaft 47.

Further, the first cutter block 46 is provided.
A first cutter motor 48 is mounted on the back side of the motor, and a driving belt 49 is attached to a pulley 48p of the first cutter motor 48 and a pulley 47p of the cutter rotating shaft 47.
Is hung. With this structure, when the first cutter motor 48 is started, the rotational force of the first cutter motor 48 is transmitted via the drive belt 49, the rotating shaft 47 and the like to the first groove processing cutter 3.
1 and the first beveling cutter 31 rotates. Note that the first groove processing cutter 31 projects forward by a predetermined size from the rectangular opening 22h of the front plate 22f in a state of being mounted on the cutter holder 47h.

As shown in FIG. 1, the third cutter moving mechanism 60 has a basic block 62 wider than the basic block 42 of the first cutter moving mechanism 40. The base block 62 is positioned so as to be parallel to the upper side of the square opening 22h of the front plate 22f, and a pair of sliders 62y is vertically fixed to the back surface of the base block 62 (see FIG. 2). ). Then, these sliders 62y engage with the Y-axis rail 22y fixed to the back side of the front plate 22f. A bolt 22b for height adjustment is rotatably supported on the front plate 22f by a support member 22a (FIG. 1).
), And a screw portion of the bolt 22b is screwed into a nut 62n fixed to the base block 62. Thus, by rotating the bolt 22b, the base block 62 can be moved up and down along the Y-axis rail 22y by an amount corresponding to the rotation angle of the bolt 22b.

Further, a scale 22m for grasping the amount of elevation of the basic block 62 is attached to a predetermined position on the front plate 22f, and after the basic block 62 is positioned, the basic block 62 is removed. A lock mechanism 22r for holding at that position is provided. Ball screws 64 are provided at both ends of the basic block 62.
Is held parallel to the X axis, and the ball screw 64
A bearing 63 for rotatably supporting the base member 62 is fixed.
And an encoder (not shown) for measuring the rotation angle of the ball screw 64 are attached.

Further, on the upper surface of the basic block 62,
As shown in FIG. 2, an X-axis rail 65 is fixed, and a slider 65 s is engaged with the X-axis rail 65 so as to be slidable in the X-axis direction. Further, the slider 6
A third cutter block 66 that supports the third groove processing cutter 33 is fixed to 5s. A nut 66n is fixed to a predetermined position on the third cutter block 66 (see FIG. 2), and the ball screw 64 is screwed to the nut 66n. Therefore, when the ball screw 64 is rotated by a predetermined angle by the servo motor 64m, the third cutter block 6 is rotated.
6 moves by a predetermined distance following the X-axis rail 65 by the action of a ball screw and nut.

A bearing 66j is formed on the third cutter block 66 in parallel with the Z-axis, and the cutter rotating shaft 67 is rotatably supported on the bearing 66j. Further, a cutter holder 67h for clamping the third groove processing cutter 33 is attached to the tip of the cutter rotating shaft 67. A pulley 67p is fixed to a base end of the cutter rotation shaft 67. Further, on the back side of the third cutter block 66, a third cutter motor 68 is mounted, and a drive belt 69 is mounted on a pulley 68p of the third cutter motor 68 and a pulley 67p of the cutter rotating shaft 67. It is hung. With this structure, when the third cutter motor 68 is started, its rotational force is transmitted to the third groove processing cutter 33 via the drive belt 69, the rotating shaft 67 and the like, and the third groove processing is performed. The cutter 33 rotates.

Next, the operation of the square pipe beveling machine 10 according to the present embodiment will be described (see FIG. 3). First, the lifting cylinder 15y of the stopper 15 located on the front surface of the groove processing section 20 is operated to hold the contact piece 15s at the stopper position. In this state, the square pipe w is inserted into the loading section 12.
Contact piece 1 of the stopper 15 by the feed roller 12r
It is transported to the position of 5 s. Then, as shown in FIG. 2, the clamp pipe 12y is operated to clamp the square pipe w while the tip end surface of the square pipe w is in contact with the contact piece 15s. At this time, the square pipe w
As shown in (2), the lower left corner S is always held at a fixed position by the side roller 12s regardless of the size.

After the positioning of the square pipe w is completed, the contact piece 15s of the stopper 15 is returned to the standby position (the position indicated by the dotted line in FIG. 2). As a result, the contact piece 15s of the stopper 15 does not interfere with the first groove processing cutter 31. Next, the basic block 52 of the second cutter moving mechanism 50 is fixed to the position adjusting bolt 22 b and the scale 2.
It is moved to a position corresponding to the size of the square pipe w using 2 m, and is held at that position by the lock mechanism 22r. Similarly, the base block 62 of the third cutter moving mechanism 60 is moved to a position corresponding to the size of the square pipe w using the bolt 22b for position adjustment and the scale 22m, and is held at that position by the lock mechanism 22r. I do. Since the lower side and the right side of the square pipe w are held at fixed positions regardless of the size of the square pipe w, the basic block 42 of the first cutter moving mechanism 40 and the basic block 72 of the fourth cutter moving mechanism 70. There is no problem in the state where is fixed in place.

In this manner, the second cutter moving mechanism 50
And the basic blocks 52, 6 of the third cutter moving mechanism 60
2 is completed, the cutter motors 48, 6
8 and the like, and the first to fourth groove processing cutters 31,
32, 33 and 34 are rotated. Next, the servo motor 4 of the first to fourth cutter moving mechanisms 40, 50, 60, 70
4m, 54m, 64m, 74m are driven, the first groove processing cutter 31 is moved rightward, the second groove processing cutter 32 is moved downward, and the third groove processing cutter 33 is operated by the action of a ball screw and nut. Is moved to the left, and the fourth groove processing cutter 34 is moved upward at a constant speed. This makes it possible to simultaneously perform beveling on the lower side, left side, upper side, and right side of the distal end surface of the square pipe w. Further, since all of the first to fourth groove processing cutters 31, 32, 33, and 34 follow the side of the square pipe w at a constant speed in a counterclockwise direction, the groove processing cutters 31, 32 are respectively. , 33 and 34 do not interfere with each other. In this manner, when the groove processing of the square pipe w is completed, the first to fourth groove processing cutters 31, 32, 33, and 34 are promptly returned to the original positions.

Thus, according to the square pipe beveling machine 10 according to the present embodiment, the beveling cutter 31,
Since 32, 33, and 34 are provided by the number of sides of the end face of the square pipe, when processing a groove on the square pipe, the groove processing cutters 31, 32, 33, and 34 are respectively provided. What is necessary is just to make a linear motion following the side. For this reason,
It is not necessary to move the gantry supporting the cutter closer to or away from the square pipe as in the related art, and the installation space for the cutter moving mechanisms 40, 50, 60, 70 can be made compact. Further, since all sides of the end face of the square pipe w can be processed at the same time, the processing time of the groove processing is reduced. Furthermore, each groove processing cutter 3
1, 32, 33, and 34 only move linearly following one side of the square pipe w, so that the groove-cutting cutters 31, 3
The movement control of 2, 33, 34 is also facilitated. In the present embodiment, a square pipe groove beveling machine has been described as an example. However, the present invention is not limited to this, and a square pipe groove beveling machine according to the present invention may be a pentagonal or hexagonal square bevel. It can also be applied to pipes.

[Second Embodiment] A square pipe beveling machine according to a second embodiment of the present invention will be described below with reference to FIGS. Here, FIG. 5 is a drawing showing a main part of a grooved machine for a square pipe according to the present embodiment, and is a view taken in the direction of arrow II in FIG. FIG. 6 shows VI-V of FIG.
I shows the view from the arrow. The beveling machine 100 for square pipes according to the present embodiment includes beveling cutters 131 and 13.
Servo motor 144m to move 2,133,134
And their beveling cutters 131, 132, 13
The apparatus is made compact by combining the cutter motors 148 for rotating the rollers 3 and 134 into one unit.

As shown in FIG. 5, four ball screws 144 are provided around the square opening 122h (see FIG. 6) formed in the front plate 122f of the tool support plate 122 in parallel with the X axis and the Y axis. The two ends of each ball screw 144 are rotatably supported by four bearings 143. A ball screw 144 (hereinafter, referred to as a first ball screw 144) disposed on the lower side of the rectangular opening 122h has a right end connected to the rotation shaft of the servomotor 144m via a coupling 144c, and a counter gear on the left end. 144w is fixed. Also, a ball screw 144 disposed on the left side of the rectangular opening 122h.
A bevel gear 144w is fixed to upper and lower ends of the lower bevel gear 1 (hereinafter referred to as a second ball screw 144).
44 w meshes with the bevel gear 144 w of the first ball screw 144.

The ball screw 144 (hereinafter, referred to as a third ball screw 144) disposed on the upper side of the square opening 122h has a bevel gear 144w fixed to left and right ends, and the left bevel gear 144w is connected to the second ball screw 144w. The upper gear 144 meshes with the bevel gear 144w. In addition, a bevel gear 144w is fixed to an upper end of a ball screw 144 (hereinafter, referred to as a fourth ball screw 144) disposed on the right side of the rectangular opening 122h, and the bevel gear 144 on the upper side thereof.
w meshes with the bevel gear 144w on the right side of the third ball screw 144. With this structure, the servo motor 14
When 4 m is activated, the first and second ball screws 144 are simultaneously rotated at a constant speed by the action of the bevel gear 144w. However, since the rotation of the first and third ball screws 144 and the second and fourth ball screws 144 is reversed by the action of the bevel gear 144w, the screws are formed in opposite directions.

Further, four rails 145 are fixed around the rectangular opening 122h in parallel with the first to fourth ball screws 144. Here, the rail 145 fixed parallel to the first ball screw 144 is the first rail 145, and the rail 145 fixed parallel to the second ball screw 144 is the rail fixed parallel to the second rail 145 and the third ball screw 144. The rail 145 fixed in parallel with the third rail 145 and the fourth ball screw 144 is called a fourth rail 145.

The first rail 145 has a first slider 14
6s (see FIG. 6) are slidably engaged, and a first cutter block 146 that supports the first groove processing cutter 131 is attached to the first slider 146s. Further, a nut 146n is fixed to the center of the first cutter block 146.
The first ball screw 144 is screwed into n. Similarly, a second slider (not shown) is provided on the second rail 145.
Are slidably engaged, and a second cutter block 156 for supporting the second groove processing cutter 132 is attached to the second slider. Further, a nut (not shown) is provided at the center of the second cutter block 156, and the second ball screw 1 is attached to the nut.
44 is screwed.

A third slider 166s (see FIG. 6) is slidably engaged with the third rail 145.
The third groove 166s is provided with a third groove processing cutter 13.
A third cutter block 166 supporting the third cutter 3 is attached. Further, the third cutter block 166 is used.
A nut (not shown) is provided at the center of the, and a third ball screw 144 is screwed into the nut. A fourth slider (not shown) is slidably engaged with the fourth rail 145, and the fourth slider supports a fourth groove processing cutter 134 on the fourth slider. A block 176 for four cutters is mounted. Further, a nut (not shown) is provided at the center of the fourth cutter block 176, and a fourth ball screw 144 is screwed to the nut.

With this structure, the servo motor 144
When the m is activated, the first and second ball screws 144 rotate at the same time at the same time by the action of the bevel gear 144w, and by the action of the ball screw and the nut, the first cutter block 14 is rotated.
6. The second cutter block 156, the third cutter block 166, and the fourth cutter block 176 move along the respective rails 145. As mentioned above,
First and third ball screws 144 and second and fourth ball screws 1
Although the rotation is opposite to that of 44, the screws are also formed in the opposite direction, so that each cutter block 146, 156, 1
66 and 176 follow the side of the rectangular opening 122h at a constant speed and travel in the same direction.

A bearing 146j (see FIG. 6) is formed in the first cutter block 146 in parallel with the Z axis, and a rotating shaft 147 is rotatably supported by the bearing 146j. A cutter holder 147h for clamping the first groove processing cutter 131 is attached to the tip of the rotating shaft 147, and a two-stage pulley 147p is fixed to the base end of the rotating shaft 147. Therefore, when the two-stage pulley 147p rotates, the first groove processing cutter 131 also rotates. Similarly, a bearing (not shown) is formed in the second cutter block 156 in parallel with the Z-axis, and the rotating shaft is rotatably supported by the bearing. A cutter holder for clamping the second beveling cutter 132 is attached to the tip of the rotating shaft, and a two-stage pulley 157p (see FIG. 5) is fixed to the base end of the rotating shaft. Therefore, when the two-stage pulley 157p rotates, the second groove processing cutter 132 also rotates.

A bearing 166j (see FIG. 6) is also formed on the third cutter block 166 in parallel with the Z axis, and a rotating shaft 167 is rotatably supported by the bearing 166j. A cutter holder 167h for clamping the third groove processing cutter 133 is attached to the tip of the rotating shaft 167, and a two-stage pulley 167p is fixed to the base end of the rotating shaft 167. Therefore, when the two-stage pulley 167p rotates, the third groove processing cutter 133 also rotates. Also, the fourth
A bearing (not shown) is also formed in the cutter block 176 in parallel with the Z-axis, and the rotating shaft is rotatably supported by the bearing. A cutter holder for clamping the fourth groove processing cutter 134 is attached to the tip of the rotating shaft, and a two-stage pulley 177p is fixed to the base end of the rotating shaft. Therefore, when the two-stage pulley 177p rotates, the fourth groove processing cutter 134 also rotates.

Further, the first to fourth cutter blocks 1
46, 156, 166, and 176 are connected by a link mechanism 180 as shown in FIG. The link mechanism 180 includes a first link piece 181, a second link piece 182, a third link piece 183, a fourth link piece 184, a fifth link piece 185, a sixth link piece 186, a seventh link piece 187, and an eighth link piece. The first link piece 188,
The base end of the link piece 181 is connected to a positioning block 190 positioned on the device gantry 121 so as to be rotatable around the Z axis. Further, a two-stage pulley 191 is mounted on the connecting portion between the positioning block 190 and the first link piece 181 so as to be rotatable around the Z axis.

The distal end of the first link piece 181 is connected to the base end of the second link piece 182 so as to be rotatable around the Z axis. The first link piece 181 and the second link piece are connected to each other. An intermediate two-stage pulley 192 is attached to a connection portion with the 182 so as to be rotatable about the Z axis. The distal end of the second link piece 182 is connected to the base end of the third link piece 183 at the position of the first cutter block 146. The second link piece 182 and the third link piece 183 are Z-shaped with respect to the first cutter block 146.
They are connected so as to be rotatable around an axis, and the center of rotation is held coaxially with the center of rotation of the two-stage pulley 147p.

The distal end of the third link piece 183 is connected to the base end of the fourth link piece 184 so as to be rotatable around the Z axis, and the third link piece 183 and the fourth link piece 184 are connected to each other. The intermediate two-stage pulley 193 has the same Z
It is mounted so that it can rotate around its axis. The distal end of the fourth link piece 184 is connected to the base end of the fifth link piece 185 at the position of the second cutter block 156. The fourth link piece 184 and the fifth link piece 18
5 is connected to the second cutter block 156 so as to be rotatable around the Z axis, and the center of rotation is held coaxial with the center of rotation of the two-stage pulley 157p.

The distal end of the fifth link piece 185 is connected to the base end of the sixth link piece 186 so as to be rotatable around the Z-axis, and the fifth link piece 185 and the sixth link piece 186 are connected to each other. The intermediate two-stage pulley 194 has the same Z
It is mounted so that it can rotate around its axis. The distal end of the sixth link piece 186 is connected to the base end of the seventh link piece 187 at the position of the third cutter block 166. The sixth link piece 186 and the seventh link piece 18
Reference numeral 7 is connected to the third cutter block 166 so as to be rotatable around the Z axis, and the center of rotation is held coaxially with the center of rotation of the two-stage pulley 167p.

The distal end of the seventh link piece 187 is connected to the base end of the eighth link piece 188 so as to be rotatable around the Z axis, and the seventh link piece 187 and the eighth link piece 188 are connected to each other. The intermediate two-stage pulley 195 has the same Z
It is mounted so that it can rotate around its axis. The tip of the eighth link piece 188 is connected to the fourth cutter block 176 so as to be rotatable around the Z axis.
The rotation center is held so as to be coaxial with the rotation center of the two-stage pulley 177p.

Further, a cutter motor 148 is provided on the apparatus stand 121, and the rotational force of the cutter motor 148 is transmitted to the two-stage pulley 191 by the belt 200. further,
The rotational force of the two-stage pulley 191 is transmitted to the intermediate two-stage pulley 192 by the belt 200, and transmitted from the intermediate two-stage pulley 192 to the two-stage pulley 147p of the first cutter block 146 by the belt 200. Also, the two-stage pulley 147 of the first cutter block 146
The rotational force of p is applied to the intermediate two-stage pulley 19 by the belt 200.
3 from the intermediate two-stage pulley 193 to the two-stage pulley 157p of the second cutter block 156 via the belt 200.

Further, the rotational force of the two-stage pulley 157p of the second cutter block 156 is transmitted to the intermediate two-stage pulley 194 by the belt 200, and the second cutter pulley 157p of the third cutter block 166 is transmitted from the intermediate two-stage pulley 194 by the belt 200. It is transmitted to the step pulley 167p. And the two-stage pulley 167 of the third cutter block 166
The rotation force of the belt 200 causes the intermediate two-stage pulley 19 to rotate.
5 from the intermediate two-stage pulley 195 to the two-stage pulley 177p of the fourth cutter block 176 by the belt 200.

That is, when the cutter motor 148 is operated, the belt, the intermediate two-stage pulley, and the two-stage pulley act to operate the first groove processing cutter 131, the second groove processing cutter 132, and the third groove processing cutter. The pre-machining cutter 133 and the fourth groove machining cutter 134 are rotated simultaneously. As described above, the cutter motor 148, the belt 200, and the two-stage pulley 191 function as the rotation source of the present invention. Also, two-stage pulleys 147p, 157p, 167
p and 177p function as the rotating body for the cutter of the present invention, and the intermediate two-stage pulleys 192, 193, 194, and 195 function as the intermediate rotating body of the present invention. Further, the belt 200
Function as the transmission member of the present invention.

Next, the operation of the beveling machine 100 for square pipes according to the present embodiment will be described. The procedure for setting the square pipe w as a work in the groove processing machine 100 is described in the square pipe groove processing machine 10 according to the first embodiment.
Since this is the same as the case described above, only the procedure for beveling will be described. First, the first to fourth groove processing cutters 131, 132, 133, and 134 according to the size of the square pipe w are set in the cutter holder. Here, when the size of the square pipe w is large, a small-diameter groove processing cutter is used, and when the size of the square pipe w is small, a large-diameter groove processing cutter is used. In addition, an adjusting screw 147z for displacing the fitting portion between the cutter holder 147h and the rotating shaft 147 (see FIG. 6) in the axial direction is provided so that the size of the chamfer can be adjusted without changing the size of the groove processing cutter. ing. When the mounting of the first to fourth groove processing cutters 131, 132, 133, and 134 is completed, the square pipe w is set at the reference position, and the cutter motor 148 is started. Thus, as described above, the belts, the intermediate two-stage pulley, and the two-stage pulley function to operate the first to fourth groove processing cutters 131,
132, 133 and 134 rotate simultaneously.

Next, the servomotor 144m is driven to move the first cutter block 146 rightward and the second cutter block 156 by the action of a ball screw and nut.
Are moved downward at a constant speed, the third cutter block 166 is moved leftward, and the fourth cutter block 176 is moved upward at a constant speed. Thereby, each cutter block 146,
The groove processing cutters 131, 132, 133, 134 mounted on 156, 166, 176 are square pipes w.
Are moved at a constant speed in the direction of the arrow following each side of the square pipe, and the groove processing of the square pipe w is performed.

Here, the first cutter block 146 and the second cutter block 156 are connected to the third link piece 183.
And the fourth link piece 184, the bending angle between the third link piece 183 and the fourth link piece 184 changes even if the distance between the cutter blocks 146 and 156 changes. Thus, the change in the distance can be absorbed. That is, the third link piece 183 and the fourth link piece 184 do not hinder the movement of the first cutter block 146 and the second cutter block 156. Meanwhile, the first
The distance from the two-stage pulley 147p of the cutter block 146 to the intermediate two-stage pulley 193 is constant, and the distance from the intermediate two-stage pulley 193 to the two-stage pulley 157p of the second cutter block 156 is also constant. Therefore, there is no inconvenience that the tension of the belt 200 applied between the pulleys changes due to the movement of the first cutter block 146 and the second cutter block 156.

The second cutter block 156 and the third cutter block 166 are connected via a fifth link piece 185 and a sixth link piece 186, and the third cutter block 166 and the fourth cutter block 166 are connected to each other. 176 is connected via a seventh link piece 187 and an eighth link piece 188. For this reason, the first cutter block 14
6. As in the case of the second cutter block 156, the link pieces 185 and the like do not hinder the movement of the cutter block 156 and the like. Also, the belt 2 hung between the pulleys
There is no inconvenience that the tension of 00 changes.

As described above, according to the square pipe beveling machine 100 according to the present embodiment, one cutter motor 1
At 48, the first to fourth groove processing cutters 131, 132,
133, 134 can be rotated, and the first to fourth cutter blocks 146, 156, 166, 176 can be moved by one servomotor 144m. Can be made more compact. In this embodiment and the first embodiment,
In the embodiment of the present invention, the example in which the groove processing is performed using the groove processing cutter has been described. However, instead of the groove processing cutter, as shown in FIGS. By using the cutters 31a, 32a, 33a, 34a, the square pipe w can be cut quickly.

Although the embodiments of the present invention have been described above, it is to be understood that the embodiments of the present invention have the following technical matters in addition to the technical matters described in the claims. Please note. (1) The beveling machine for square pipes according to claim 2, wherein the ball screws are connected to each other by a bevel gear so that rotation can be transmitted to each other. (2) The square pipe beveling machine according to claim 3, wherein the transmission member is a belt, and the cutter rotating body and the intermediate rotating body are pulleys on which the belt is hung. Beveling machine.

[0051]

According to the present invention, the installation space for the cutter moving mechanism can be made compact, the machining time can be shortened, and the control of the groove machining cutter becomes easy.

[Brief description of the drawings]

FIG. 1 is a drawing showing a main part of a beveling machine for a square pipe according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is an overall side view of a square pipe beveling machine according to the first embodiment of the present invention.

FIG. 4 is a side view (A) of the square pipe after the groove processing, and a perspective view (B) of the square pipe with a groove welded.

FIG. 5 is a front view showing a main part of a square pipe beveling machine according to a second embodiment of the present invention.

6 is a view taken in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is a front view showing a conventional square pipe beveling machine.

FIG. 8 is a front view of a main part and a view taken in the direction of arrows BB when the groove pipe cutting machine according to the present invention is used as a square pipe cutting machine.

[Explanation of symbols]

 w Square pipe 31 First groove processing cutter 32 Second groove processing cutter 33 Third groove processing cutter 34 Fourth groove processing cutter 40 First cutter moving mechanism 50 Second cutter moving mechanism 60 Third Cutter moving mechanism 70 Fourth cutter moving mechanism 144m Servo motor 148 Cutter motor (rotation source) 147p Two-stage pulley (Cutter rotating body) 157p Two-stage pulley (Cutter rotating body) 167p Two-stage pulley (Cutter rotating body) 177p Two-stage pulley (rotator for cutter) 191 Two-stage pulley (rotation source) 192 Intermediate two-stage pulley (intermediate rotor) 193 Intermediate two-stage pulley (intermediate rotor) 194 Intermediate two-stage pulley (intermediate rotor) 195 intermediate Two-stage pulley (intermediate rotating body) 200 Belt (transmission member)

Continued on the front page (72) Inventor Takeshige Takeshige 5-14, Midorigaoka, Toyota-shi, Aichi Prefecture Inside Daitosei Machine Co., Ltd.

Claims (3)

[Claims] 1. A square pipe beveling machine for forming a groove for welding on a distal end surface of a square pipe, comprising: a number of groove processing cutters equal in number to the sides of the distal end surface of the square pipe; A groove moving machine for a square pipe, comprising: a cutter moving mechanism for moving a groove processing cutter along each side of the square pipe. 2. The square pipe beveling machine according to claim 1, wherein the cutter moving mechanism moves the beveling cutter using the action of a ball screw and a nut. Wherein the ball screws for moving the beveling cutter are connected to each other so that rotation can be transmitted to each other. 3. A beveling machine for a square pipe according to claim 1, wherein the rotating body for the cutter moves integrally with the beveling cutter and transmits a rotational force to the beveling cutter. A rotating source positioned at a fixed position, an intermediate rotating body provided between the rotating source and the rotating body for the cutter, and between each rotating body for the cutter, the rotating body for the cutter and the intermediate rotating body And a link mechanism whose end is positioned at the position of the rotation source, and a rotational force of the rotation source via an intermediate rotation body. A transmission member that transmits the rotational force of the cutter rotator to another cutter rotator via another intermediate rotator. Beveling machine.