JP2003025103A - Device for machining steel pipe end - Google Patents

Abstract

PROBLEM TO BE SOLVED: To machine the end section of a steel pipe with small diameter without lowering machining accuracy. SOLUTION: Two tool posts 28 and 30 are arranged in the front face of a rotary disk 22 so as to be supported on a device body 14 pivotally so as to be able to move radially. Each of the tool posts 28 and 30 is provided with a turning arm 44 rotatably. The first arm section 44a of the turning arm 44 in the first tool post 28 is provided with a first cutting tool 48, to which an external end tip 46 formed so as to bevel and chamfer the external end section of the steel pipe and flatten the shaft end face of the steel pipe is secured. The first arm section 44a in the turning arm 44 of the second tool post 30 is provided with a second cutting tool 72, which is provided with a second tip 70 to bevel and chamfer the internal end section of the steel pipe. A copy roller 56 abutting on the external periphery is arranged rotatably at the first arm section 44a in each turning arm 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing a steel pipe end, and more particularly, it is mounted on a rotary plate while rotating the rotary plate with a copying roller in contact with the outer peripheral surface of the steel pipe. The present invention relates to a processing device for performing a required processing on an end portion of a steel pipe with a tip of a cutting tool.

[0002]

2. Description of the Related Art A machining apparatus for machining the outer and inner ends of a steel pipe with chamfered chamfering and for flattening the end face of the shaft of the steel pipe is mounted on a main shaft rotatably supported on the main body of the device. A rotary disk that rotates integrally with each other, and three tool rests are respectively arranged on the front end surface of the rotary disk so as to be movable and adjustable in the radial direction. Each turret is positioned and fixed at an appropriate machining position that is radially displaced from the center of rotation of the rotary disc, and is equipped with a bite equipped with a tip according to the machining site, machining shape, etc. of the steel pipe. That is, a tool post that processes the outer end of a steel pipe is equipped with an outer end bite, a tool post that processes the inner end of a steel pipe is equipped with an inner end bite, and a tool post that processes the shaft end surface of the steel pipe The table is equipped with an end face bite. Then, the end face of the steel pipe is positioned opposite to the front face of the turntable, and the turntable is rotated in the required direction while the tool rests are positioned at the working positions in accordance with the working portions of the steel pipe, thereby rotating the turntable. The tip of each turret that rotates with the rotation of the board is configured to perform chamfering processing on the outer end and the inner end of the steel pipe and to perform flat processing on the shaft end surface.

The above-mentioned processing apparatus is provided with a copying roller which comes into contact with the outer peripheral surface of the steel pipe in order to carry out high-precision chamfering processing with the tips of the cutting tools for the outer and inner ends. That is, turning arms are rotatably disposed on the tool rest for machining the outer end portion and the tool rest for working the inner end portion, respectively, and a turning tool equipped with a tip is attached to each pivot arm. At the same time, a copying roller set to come into contact with the outer peripheral surface of the steel pipe is rotatably arranged. Then, the rotating arm is biased by a spring so that the copying roller is always in contact with the outer peripheral surface of the steel pipe, and the cutting force generated during processing acts so as to rotate the copying roller in the direction of contacting the outer peripheral surface of the steel pipe. The copying roller is arranged in a positional relationship, and the tip is swung along the outer peripheral surface of the steel pipe to perform a high-precision chamfering process.

[0004]

In the processing apparatus, when the diameter or thickness of the steel pipe to be processed is changed by changing the order, the three tool rests are moved close to each other in the radial direction of the turntable accordingly. -Move away to adjust the tip position.
In this case, since three turrets are arranged on the turntable, the spacing between the respective turrets in the circumferential direction is narrow, and therefore 3 turrets are used.
When adjusting the movement of the base turret close to each other, at a position greatly separated from the center of rotation of the turntable, the copy rollers provided on the turret for processing the outer end portion or the inner end portion, The copying roller and the tool rest for machining the shaft end surface interfere with each other. That is, the conventional processing apparatus cannot handle a small-diameter steel pipe, and the pipe diameter range of the steel pipe that can be processed is limited. In the structure in which the tip is fixed and held at a fixed position corresponding to the processed portion of the steel pipe without providing a copying roller, the separation distance between the three tool rests can be shortened, and the small diameter steel pipe can be used. Also, it is possible to perform the required processing. However, in this case, it is difficult to position the tip accurately with respect to the end of the steel pipe, and if there are variations in the thickness and diameter of the steel pipe, chamfering evenly on the outer and inner ends. There is a problem that processing cannot be performed and processing accuracy is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the above-mentioned conventional techniques, and has been proposed in order to solve the problems appropriately. An object of the present invention is to provide a device for processing a steel pipe end portion capable of processing the end portion.

[0006]

In order to overcome the above-mentioned problems and achieve the intended purpose, a steel pipe end processing apparatus according to the present invention is provided with a Kisaki chamfering process for the outer end and inner end of a steel pipe. In addition to the above, a processing device for performing flat processing on the shaft end surface of the steel pipe, the rotating disk being rotatably arranged on the apparatus main body, and the moving positioning adjustment being provided on the front end surface of the rotating disk. A first turret and a second turret, rotating arms rotatably arranged on the respective turrets, and rotating arms of the first turret mounted on the outer end or inner end of the steel pipe. A first bite having a tip for machining any one of the two machining parts and a shaft end surface, and a tip provided with a chip for machining the remaining machining parts, which is mounted on the rotary arm of the second tool post. 2 bites and a copying roller rotatably arranged on each of the rotating arms and capable of contacting the outer peripheral surface of the steel pipe. Ri, characterized by being configured to process each working portion of the steel pipe by mounting chips to each byte while abutting the respective scanning roller on the outer peripheral surface of the steel pipe.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a steel pipe end processing apparatus according to the present invention will be described below with reference to the accompanying drawings, with reference to preferred embodiments.

FIG. 1 is a front view showing a turntable of a processing apparatus according to an embodiment, and FIG. 2 is a schematic configuration diagram showing the entire processing apparatus according to the embodiment. A pair of guides are provided on an upper surface of a base 10. Rails 12 and 12 (only one shown) are arranged in parallel,
The device main body 14 is mounted on the guide rails 12 and 12 so as to be slidable. Further, a holding device 18 for holding the steel pipe 16 is arranged on the base 10 facing the front of the device body 14 with the end surface of the steel pipe 16 facing the device body 14. The device body 14 is configured to move toward and away from the steel pipe 16 held by the holding device 18 by moving means 20 including a combination of a screw shaft and a nut that is normally and reversely rotated by a servomotor. .

A main shaft (not shown) parallel to the guide rail 12 is rotatably supported inside the apparatus main body 14, and a circular rotary disk 2 is provided at the shaft end of the main shaft projecting from the front surface of the main body.
2 are integrally arranged. A drive motor 26 is connected to the main shaft via a transmission system 24 including gears and belts, and the main shaft and the turntable 22 are configured to rotate integrally by driving the drive motor 26. The steel pipe 16 is positioned with respect to the turntable 22 with its axis aligned with the center of rotation of the turntable 22.

As shown in FIG. 1, two tool rests 28 and 30 are arranged on the front surface of the rotary disc 22 so as to be movable in the radial direction. Since the basic configurations related to the two turrets 28 and 30 are the same, the first turret 28 arranged above the rotation center of the turntable 22 in FIG.
The configuration of the second tool post 30 on the lower side will be described with the same reference numerals.

The T-slots 32, 3 are provided on the turntable 22.
2 are formed in parallel with being separated from each other on the left and right, and both T grooves 32, 32
A base 34 of the first turret 28 is slidable along and can be positioned and fixed at an arbitrary position by a plurality of (four in the embodiment) bolts 36. In addition, the turntable 22
On the front surface of the turntable outside the T groove 32 at a position away from the rotation center of the scale, scales 38 having scales are arranged at predetermined intervals in the extending direction of the T groove 32.
The position of the pedestal 34 is adjusted by adjusting the pointer 40 arranged in the above position to an arbitrary scale according to the diameter of the steel pipe 16.

A support shaft 42, which is parallel to the main shaft, is provided on the base 34 so as to project forward, and a rotary arm 44 is rotatably disposed on the support shaft 42. Further, the first arm portion 44a extending in one radial direction (on the side of the rotation center of the turntable 22) with the support shaft 42 of the rotating arm 44 interposed therebetween is subjected to a Kisaki chamfering process on the outer end portion of the steel pipe 16. At the same time, a first bite 48 to which a first tip (chip) 46, which is formed in a shape capable of being machined in a plane, is detachably mounted on the shaft end surface of the steel pipe 16 is provided (see FIG. 3). Also, the first byte 48
A holding shaft 54, which is parallel to the support shaft 42, projects forward from the first arm portion 44a in which is arranged, and a copying roller 56 is rotatably arranged on the holding shaft 54. ing.
As shown in FIG. 3, the copying roller 56 is formed with a copying surface 56a having an outer peripheral surface of the same diameter and a guide surface 56b which is continuous with the copying surface 56a and whose diameter gradually decreases toward the front end. When the outer end portion and the shaft end surface are processed by the first tip 46, the copying surface 56a is configured to contact the outer peripheral surface of the steel pipe 16. The guide surface 56b of the copying roller 56 functions to guide the copying surface 56a of the roller 56 to the outer peripheral surface of the steel pipe 16 when the apparatus body 14 is moved closer to the steel pipe 16.

A second arm portion 44b extending in a direction opposite to the first arm portion 44a with the support shaft 42 of the rotating arm 44 interposed therebetween.
The support member 58 is disposed on the base member 34, and one shaft end of the rod 60 slidably inserted into the support member 58 is attached to the base 34.
Is swingably connected via a first holder 62.
Further, the rod 60 is slidably fitted with a second holder 64 which is brought into contact with the support member 58 and whose position is regulated.
A compression coil spring 66 as an elastic means is provided between the holders 62 and 64. The compression coil spring 66 functions to urge the rotating arm 44 to rotate about the support shaft 42 in the direction in which the copying roller 56 contacts the outer peripheral surface of the steel pipe 16 (clockwise in FIG. 1). As a result, the copying roller 56 comes into contact with the steel pipe 16 with a required copying force (pressing force). Also, the base 34
A stopper 68 is provided on the front surface of the stopper 68 at a position where the first arm portion 44a rotated clockwise by the elastic force of the compression coil spring 66 can come into contact with the stopper arm 68 to regulate the rotation angle of the rotation arm 44. To be done.

The copying surface 56a of the copying roller 56 is
3 is in contact with the outer peripheral surface of the steel pipe 16, as shown in FIG. 3, the first tip 46 is in contact with the corresponding outer end portion and shaft edge surface of the steel pipe 16 at a required angle, and the both ends of the steel pipe 16 are removed. It is set so that chamfering or flattening can be performed.
Further, with respect to the rotating arm 44, the first tip 46 has a cutting force generated when the steel pipe 16 is processed by the tip 46.
The rotating arm 44 is arranged at a position that acts so as to rotate clockwise in FIG. 1, that is, in a direction in which the copying roller 56 is brought into contact with the outer peripheral surface of the steel pipe 16. This prevents the copying roller 56 from being separated from the outer peripheral surface of the steel pipe 16 during processing and deteriorating the processing accuracy. Further, in the embodiment, the rotation arm 44 with respect to the support shaft 42 is
The center of gravity including the weight of the copying roller 56, the first bite 48, etc. is set to be pivotally supported so that the centrifugal force and the weight when the turntable 22 rotates do not affect the copying force. To be done.

In FIG. 1, the rotary arm 44 of the second tool rest 30 arranged below the center of rotation of the rotary table 22.
As shown in FIG. 4, the first arm portion 44a extending to the center of rotation of the second pipe 72 is provided with a second bite 72 having a second tip (tip) 70 capable of chamfering the inner end of the steel pipe 16. Are arranged so that they can be removed and replaced. The second chip 70 has a copying surface 56a of the copying roller 56.
Is abutted on the outer peripheral surface of the steel pipe 16, and abutted on the inner end portion of the steel pipe 16 at a required angle as shown in FIG. That is, in the processing apparatus of the embodiment, the first turret 28 performs chamfering and flattening of the outer end portion and the shaft end surface of the steel pipe 16, and the second turret 30 performs chamfering of the inner end portion of the steel pipe 16. It is configured to perform processing. Also,
The machining position of the outer end portion and the shaft end surface of the steel pipe 16 by the first turret 28 and the machining position of the inner end portion of the steel pipe 16 by the second turret 30 are at positions facing each other with the center of rotation of the turntable 22 interposed therebetween. Is set. That is, the outer edge portion and the shaft end surface are machined by the first tool rest 28 at one of the most distant portions with the shaft center aligned with the center of rotation of the turntable 22 with the shaft center of the steel pipe 16 interposed therebetween, and In the area of, the inner end portion is processed by the second tool post 30. Also in the second tool rest 30, the cutting force generated when the steel pipe 16 is processed by the second tip 70 with respect to the rotating arm 44 causes the rotating arm 44 to move clockwise in FIG. That is, the copying roller 56 is arranged at a position where it operates so as to rotate in a direction in which it comes into contact with the outer peripheral surface of the steel pipe 16.

As shown in FIG. 1, the turntable 22 of the embodiment is provided with a plurality of guide grooves 74 capable of adjusting the position of another tool rest (not shown) in the radial direction. It is configured so that three turrets can be arranged.

[0017]

Operation of the Embodiment Next, the operation of the processing apparatus according to the embodiment thus constructed will be described. In the device body 14, the first and second tool rests 28 and 30 are attached to the turntable 22 by using the scale 38 and the pointer 40 according to the dimensions of the steel pipe 16 held by the holding device 18. Adjust the position and fix with bolts. At this time, the rotating arms 44 are held in a non-actuated state in which they are in contact with the stopper 68 by the elastic force of the compression coil spring 66. Further, in this non-operating state, the guide surface 56b of the copying roller 56 is set at a position where it can contact the outer end portion of the steel pipe 16.

When the apparatus main body 14 is moved close to (advanced) the end face of the steel pipe 16 while the turntable 22 is rotationally driven by the drive motor 26, first, the guide surfaces 56b of the respective copying rollers 56 are moved outside the steel pipe 16. Abut the end. As the device body 14 advances, the rotating arm 44 is supported by the support shaft 42 while the guide surface 56b is in contact with the outer end portion of the steel pipe 16.
While turning in the counterclockwise direction (in FIG. 1) around the center, the copying surface 56a of the copying roller 56 comes close to the outer peripheral surface, and the copying surface 56a comes into contact with the outer peripheral surface of the steel pipe 16. In this state, in the first tool post 28, the first tip 46 mounted on the first bite 48 is
The rotation of the steel pipe 16 causes the locus to follow the outer end portion and the shaft end surface of the steel pipe 16. Further, in the second tool rest 30, the second tip 70 mounted on the second bite 72 is
By the rotation of the turntable 22, the locus that follows the inner end of the steel pipe 16 is turned.

When the device body 14 is further advanced, the first
The outer tip portion and the shaft end surface of the steel pipe 16 are chamfered and flattened by the rotating first tip 46 of the tool rest 28. At this time, since the cutting force of the first tip 46 acts in the direction of pressing the copying roller 56 against the outer peripheral surface of the steel pipe 16, reliable copying by the copying roller 56 is performed, and highly accurate Kisaki chamfering and flat surface machining are performed. To be achieved. The inner tip of the steel pipe 16 is chamfered by the turning second tip 70 of the second tool post 30. Also in this case, since the cutting force of the second tip 70 acts in the direction of pressing the copying roller 56 against the outer peripheral surface of the steel pipe 16, reliable copying is performed by the copying roller 56 and high-precision Kasaki chamfering is achieved. It

If the diameter of the steel pipe 16 is changed when the order of the steel pipe 16 is changed, the bolt 3 for fixing the base 34 is fixed.
6 is loosened, and the first turret 28 and the second turret 30 are moved toward and away from each other. In this case, the first turret 28 and the second turret 30 are opposed to each other with the center of rotation of the turntable 22 sandwiched therebetween, and the two machining portions (outer ends) corresponding to each other at the most distant points in the steel pipe 16. Part, shaft end face / inner end) are set so that the tool rests 28, 30
The distance from the center of rotation is short when the copying rollers 56, 56 interfere with each other and cannot come close to each other. That is, in the processing apparatus, the steel pipe 16 can be processed with the two tool rests 28, 30 closer to each other than in the conventional case, so that the steel pipe 16 having a small diameter can be processed and the workable range is widened.

In the above-described embodiment, the case where the outer end portion and the shaft end surface of the steel pipe are machined in the first turret and the inner end portion of the steel pipe is machined in the second turret has been described, but the present invention is not limited to this. Not something that is done. For example, a tip having a shape capable of processing the inner end portion and the shaft end surface is attached to the first cutting tool of the first turret, and a tip having a shape processing the outer end portion is mounted to the second cutting tool of the second turret. By doing so, it is possible to adopt a configuration in which the inner end portion and the shaft end surface of the steel pipe are processed in the first turret and the outer end portion of the steel pipe is processed in the second turret.

[0022]

As described above, according to the apparatus for processing a steel pipe end portion according to the present invention, the machining of the three working portions of the outer end portion, the inner end portion and the shaft end surface of the steel pipe is arranged on the rotating disk. Since the two tool turrets are provided, the distance between the two turrets in the circumferential direction can be set large. That is,
Since the two tool turrets can be brought closer to each other without interfering with the copying rollers, the steel pipe can be processed with high accuracy using the copying roller even for small diameter steel pipes. The diameter range can be expanded. Further, since it is possible to perform machining at three locations with two turrets, it is possible to reduce the number of parts and to reduce manufacturing costs.

[Brief description of drawings]

FIG. 1 is a front view of a turntable in a processing apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an entire processing apparatus according to an embodiment.

FIG. 3 is a side view of essential parts showing a first tool post in the processing apparatus according to the embodiment.

FIG. 4 is a side view of essential parts showing a second tool post in the processing apparatus according to the embodiment.

[Explanation of symbols]

14 Device body 16 steel pipe 22 turntable 28 1st Turret 30 Second Turret 44 rotating arm 46 1st chip (chip) 48 1st byte 56 Copying roller 70 Second chip (chip) 72 Second byte

Claims (2)

[Claims] 1. A processing apparatus for performing a Kisaki chamfering process on an outer end portion and an inner end portion of a steel pipe (16) and performing a flat surface machining on an axial end face of the steel pipe (16), the device main body (14) comprising: A turntable (22) rotatably provided, and a first tool post (28) and a second tool post (30) provided on the front end face of the turntable (22) so as to be movable and adjustable. Each turret (2
8, 30) are attached to the rotating arm (44) and the rotating arm (44) of the first tool post (28), respectively, and are attached to the outer end of the steel pipe (16) or Attached to the turning tool (44) of the second tool post (30) and a first bite (48) equipped with a tip (46) for machining any one of the inner end portion and two processing portions of the shaft end surface. And a second bite (72) provided with a tip (70) for machining the remaining machining part, and rotatably arranged on each of the rotary arms (44) so as to contact the outer peripheral surface of the steel pipe (16). Steel pipe (16) consisting of possible copying rollers (56)
Each copying roller (56) is brought into contact with the outer peripheral surface of the steel pipe (16) by the chips (46, 70) attached to the cutting tools (48, 72). Equipment for processing steel pipe ends. 2. The steel pipe (16) is positioned with its axis aligned with the center of rotation of the turntable (22), and the first tool post (2)
The first bite (48) of 8) is set so as to machine two machining parts at one of the most distant parts with the shaft center of the steel pipe (16) interposed therebetween, and at the same time, the second tool post (30). The apparatus for processing a steel pipe end according to claim 1, wherein the second bite (72) is set so as to machine one machining portion at the other site of the steel pipe (16).