JPH1110474A - Rotary drive device for pipe to be machined - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate mounting and post-processing even if a pipe to be machined causes warp and a cross section of the pipe is not completely round. SOLUTION: A rotary drive device 1 of a pipe to be machined is constituted in such a manner that a pair of screw rods 3, 3 in which lead angles of screws 3B, 3C on both sides are mutually reversed are rotatably supported on a side face of a ring 2 having a larger diameter than that of a pipe to be machined P, a pair of basic frame members whose long and short distances are adjusted are screw-fitted in the screw rods 3, 3, a clamp block of the pipe to be machined P is fixed at the center in the direction of length of the basic frame member, the ring 2 having a large diameter is rotatably supported from inner periphery by a bearing block 6, a rotary drive device 7 of the ring 2 having the large diameter is attached to the bearing block 6, the bearing block 6 is supported by horizontal guide rods 8, 8, both ends thereof are supported by vertical guide rods 10, 10 in such a manner that they can slide in the vertical direction, a pair of horizontal adjusting springs which keep the bearing block 6 at a central position in the right and left directions are slide-fitted in the horizontal guide rods 8, 8, and a pair of longitudinal adjusting springs 12, 12 which keep the bearing block 6 at a central position in the vertical direction are slide-fitted in the vertical guide rods 10, 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary driving device for a pipe to be processed, and more particularly, to a rotary driving apparatus for a pipe to be processed which is suitable for a processing apparatus for processing while rotating a pipe containing a molding error such as warpage in the axial direction. About.

[0002]

2. Description of the Related Art In some cases, a centrifugally cast tube is subjected to an outer surface treatment on a tube outer periphery and a tube end after casting. In this outer surface processing, a pipe is generally placed on a rotating roller, and the pipe is rotated to perform a desired processing.

In performing this processing, a driving force for rotating the tube is obtained by using a rotating roller on which the tube is installed as a driving roller, transmitting the rotating force to the tube by friction, or directly engaging a chuck device with the tube. There is one that rotates the pipe.

[0004]

However, the cast iron pipe may have a non-circular cross section or a warp in the pipe axis due to the specificity of the manufacturing method.

[0005] Although these deformations are within the range of the allowable error as well as the standard of the product, there is no problem, but there is a problem that various adverse effects occur during the rotation processing. In other words, when the frictional rotation is performed by the drive roller, there is a problem that the pipe may float from the drive roller due to the warp of the pipe shaft, and the rotational force is not uniformly transmitted, and the rotational speed becomes uneven, so that accurate processing becomes difficult. Was.

Further, since the parallelism between the axis of the drive roller and the tube axis of the tube to be processed is shifted, a frictional force of an axial component is generated on the contact surface, and the tube moves in the axial direction due to this effect, and the processed surface shifts. There was a problem that there was.

If the cross section of the pipe is not a perfect circle, the height of the outer peripheral apex of the pipe to be processed fluctuates periodically on the drive roller by the fluctuation of the diameter, so that processing based on the virtual center is very difficult. There was a problem.

On the other hand, in the case of the chuck device, there is a problem that even if the pipe is slightly warped, the processing itself becomes impossible because the pipe end whirls like a razor motion. If the tube cross section is not a perfect circle, there is no problem in the case of the chuck device after the installation is completed, but there is a problem that the adjustment work until the rotation center coincides with the virtual center and the installation is very troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problem, and a rotary drive device for a pipe to be processed which can be mounted and processed very easily even when the pipe is warped or the pipe cross section is not a perfect circle. The purpose of this is to provide.

[0010]

According to a first aspect of the present invention, there is provided a rotary driving apparatus for a pipe to be processed, comprising: a ring having a diameter larger than that of the pipe to be processed; A pair of screw rods, wherein a center in a longitudinal direction is rotatably fixed to a side surface of the ring around a screw shaft, and lead angles of screws on both sides sandwiching the center are in a reverse relationship to each other; A pair of base frame members that are screw-fitted from both ends of the base member and are adjusted in perspective while maintaining a parallel interval by forward and reverse rotation of the screw rod; and A clamp block for the pipe to be processed fixed to the side surfaces of the pair of base frame members, a bearing block for rotatably supporting the large-diameter ring from the inner periphery, and the large block attached to the bearing block. Diameter A ring driving device, a pair of horizontal guide rods slidably fitted on the upper and lower edges of the bearing block only in the horizontal direction relative to the bearing block, and the both ends of the pair of horizontal guide rods in the vertical direction. A pair of vertical guide rods supported only slidably and erected on the substrate, and a pair of lateral directions inserted between both sides of the bearing block and the vertical guide rod to keep the bearing block at the center position in the left-right direction An adjusting spring and a pair of vertical adjusting springs interposed between the horizontal guide rod and the substrate to keep the bearing block at a vertical center position.

That is, the pipe is fixed to the center of the large-diameter ring,
By rotating this ring together with the pipe, it is possible to rotate the pipe accurately without slowing down.The large-diameter ring that fixes the pipe is provided with horizontal and vertical guide rods in two planes perpendicular to the pipe axis. Since it is possible to freely change in the dimensional direction, even if there is a warp in the tube axis, there is no change in the number of revolutions and torque, and accurate machining can be performed.

According to a second aspect of the present invention, there is provided a rotary driving device for a pipe to be processed, wherein the pair of screw rods attached to the large-diameter ring are in a horizontal position. And a rotary drive device which is detachably engaged with one end of the rotary member.

[0013] Since the distance adjustment of the clamp block of the tube is performed by a rotary drive device such as a motor, automatic alignment can be performed by controlling the rotary drive device.
According to a third aspect of the present invention, there is provided a rotary drive device for a pipe to be processed according to the first or second aspect, wherein a rotary transmission device is interposed between a pair of screw rods attached to the large diameter ring. It is characterized by having been done.

If one of a pair of screw rods for adjusting the distance of the clamp block is driven to rotate, the other screw rods are also driven to rotate, thereby simplifying the driving system of the screw rods.

[0015]

Next, an embodiment of the present invention will be described. 1 is a front view of an embodiment of the apparatus of the present invention, FIG. 2 is a side view thereof, FIG. 3 is a rear view, and FIG. 4 is an enlarged front view of a main part.

The rotary drive device 1 for a pipe to be processed according to the present invention comprises:
It is composed of a holding part having a large diameter ring 2 as a base for fixing the pipe P to be processed, and a fixing part for rotatably supporting the whole holding part.

As shown in the enlarged view of FIG.
A ring 2 having a larger diameter than the pipe P to be processed, and a pair of threaded rods 3 and 3 symmetrically arranged on the side surface of the ring 2 with a ring rotation center 2A interposed therebetween, and the center 3A in the longitudinal direction is the ring side surface 2B. And a pair of screw rods 3, 3 in which the lead angles of the screws 3B, 3C on both sides of the center 3A are opposite to each other, and from both ends of the pair of screw rods 3, 3. A pair of base frame members 4, 4 which are screw-fitted and whose distance is adjusted while maintaining a parallel interval with each other by forward and reverse rotation of the screw rods 3,
A base frame member 4 and a clamp block 5, 5 for the pipe P to be processed, which is fixed to the side of the base frame material 4 so as to face each other on the diameter line of the ring 2 at the center in the length direction of the ring 4. .

In the drawing, reference numeral 3D denotes a guide for guiding the base frame members 4 and 4, and serves to reduce a load applied to the screw rods 3 and 3 when the screw rods 3 and 3 are moved. Next, as shown in FIG. 3, the fixing portion rotatably supporting the gripping portion includes a bearing block 6 rotatably supporting the large-diameter ring 2 from the inner periphery, and a fixing block attached to the bearing block 6. Rotating drive device 7 for the large-diameter ring 2 and bearing block 6
A pair of horizontal guide rods 8, 8 slidably fitted on the upper and lower edges of the bearing block 6 only in the horizontal direction.
And a pair of vertical guide rods 10, 10 erected on a base 9 by supporting both ends of the pair of horizontal guide rods 8, slidably only in the vertical direction, the bearing block 6, and the vertical guide rod A pair of lateral adjustment springs 11, 11 interposed between both sides of the vertical guide rods 10, 10 to maintain the bearing block 6 at the center position in the horizontal direction;
And a pair of vertical adjusting springs 12, 12 interposed between the base 9 and the base 9 to keep the bearing block 6 at the center in the vertical direction.

In FIG. 2, reference numeral 17 denotes a roller for moving the pipe P in the axial direction. Reference numeral 18 denotes a jack device for adjusting the height of the gripping portion, which can be automatically controlled based on pipe type information input in advance.

In the above description, the large diameter ring 2 and the rotary drive unit 7 are connected to a drive motor 7B fixed to a bearing block 6 as shown in an enlarged view in FIG. To be driven.

The drive motor 7B has an encoder 7
A sensor such as C may be provided to automatically control the rotation operation. Further, in the rotation drive device 1 for the pipe to be processed, the pair of screw rods 3 attached to the large-diameter ring 2 are removably engaged with one end 3E of the screw rod at a position where the pair is in a horizontal posture as shown in the figure. May be provided.

In the illustrated example, the rotary drive device 14 is provided on the lower screw rod 3, but may be provided on any of the upper and lower screw rods 3. When the lower screw rod 3 is provided with the rotary drive device 14 as described above, a rotary transmission device 15 such as a rubber belt, a V belt or a timing belt is interposed between the pair of screw rods 3 as shown in FIG. Inserted.

In the drawing, reference numeral 16 denotes a stopper for the large-diameter ring 2, which stops the threaded rod 3 at a predetermined position of the rotary drive unit 14, and rotates while the work tube is fixed to the clamp block 5. Fix it not to.

If the rotary drive device 14 is a servomotor, automatic control becomes possible. In this case, the encoder and the clamp block can be omitted. In the drawing, reference numeral 17 denotes a carry-in roller for feeding the pipe P to be processed into the rotation driving device 1 for the pipe to be worked, and 17A denotes a roller which lifts the pipe P to cut the edge of the carry-in roller 17 and simultaneously supports the outer periphery of the pipe during rotation. Show.

Next, the operation of the rotary drive device 1 for the pipe to be processed according to the present invention will be described. First, the large-diameter ring 2 is fixed with the stopper 16 so that the screw rods 3 and 3 are horizontal, and the screw rods 3 and 3 are rotated so that a gap into which the pipe P to be processed can be inserted is formed between the clamp blocks 5 and 5. .

The screw rods 3 and 3 have screws 3B and 3C on both sides.
Are opposite to each other, the distance between the clamp blocks 5, 5 may be increased or decreased depending on the rotation direction.

Next, the portion P to be processed is placed on the support roller 17 and is moved in the axial direction, and is inserted between the clamp blocks 5 and 5. Adjust the support roller 17A up and down to adjust the pipe P to be processed.
And the height of the grip portion including the large-diameter ring 2 is adjusted by the jack device 18 in accordance with the virtual center position.

Next, the threaded rods 3, 3 are rotated in the opposite direction to the above, and the pipe P to be processed is gripped and fixed between the clamp blocks 5, 5. When the holding and fixing are completed, the rotation driving device 1
4 is retracted from the screw rod 3 and the rotation driving device 7 for the large-diameter ring is driven to rotate the pipe P to be processed together with the large-diameter ring 2.

Therefore, the pipe P to be processed can maintain a constant rotational speed and perform accurate processing regardless of the warp or roundness error of the shaft. When the pipe to be processed P is warped,
The large-diameter ring 2 is displaced in the vertical and horizontal directions according to the amount of warpage, but this displacement is absorbed by the relative sliding motion between the bearing block 6 and the horizontal guide rod 8, and between the horizontal guide rod 8 and the vertical guide rod 10, Unreasonable stress is prevented from being generated in the pipe to be processed P and the rotary drive device 1 for the pipe to be processed.

When the processing is completed, the pipe P to be processed is released in a procedure reverse to that described above, and the support roller 17A is lowered to make the roller 1
At 7, the pipe P is unloaded.

[0031]

As described above, according to the apparatus of the present invention, the ring gripping the pipe to be processed from the outer periphery rotates as it is to rotate the pipe. Even if there is an error, it is possible to accurately rotate the pipe, and high-precision processing is possible.

Further, even if the pipe is set so that the pipe end is not moved because the pipe is warped in the axial direction, the run-out at the center of the pipe is absorbed by the movement of the bearing block in the up-down and left-right directions. This has the effect of enabling smooth processing.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the device of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a rear view of the same.

FIG. 4 is an enlarged front view of a main part.

FIG. 5 is an enlarged sectional view of a main part of the rotation drive unit.

FIG. 6 is an enlarged rear view of a main part of the rotation drive unit.

[Explanation of symbols]

 P ... Pipe to be processed 1 ... Rotation drive device for pipe to be processed 2 ... Large diameter ring 2A ... Ring rotation center 2B ... Ring side face 3 ... Screw rod 3A ... Center 3B ... Screw 3C ... Screw 4 ... Base frame material 5 ... Clamp block DESCRIPTION OF SYMBOLS 6 ... Bearing block 7 ... Rotation drive device 8 ... Horizontal guide rod 9 ... Base 10 ... Vertical guide rod 11 ... Lateral adjustment spring 12 ... Vertical adjustment spring 17 ... Axial movement roller of a pipe to be processed 18 ... Jack device to adjust height

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigenori Kawamo 2-47 Shishitsu Higashi 1-chome, Naniwa-ku, Osaka-shi, Osaka

Claims (3)

[Claims] 1. A ring having a diameter larger than a pipe to be processed and a pair of threaded rods arranged symmetrically in parallel on the side of the ring with the center of rotation of the ring interposed therebetween. A pair of threaded rods, which are rotatably fixed to each other, and whose lead angles of both sides sandwiching the center are opposite to each other, are screw-fitted from both ends of the pair of threaded rods, and are parallel to each other by forward and reverse rotation of the threaded rod. A pair of base frame members that are adjusted in perspective while maintaining an interval; and the work piece fixed to the side surfaces of the pair of base frame members so as to face each other at the center of the base frame members and on the diameter line of the ring. A clamp block for a pipe, a bearing block for rotatably supporting the large-diameter ring from the inner periphery, a rotation driving device for the large-diameter ring attached to the bearing block, and upper and lower edges of the bearing block A pair of horizontal guide rods that are slidably fitted to the bearing block only in the horizontal direction, and a pair of uprights mounted on the substrate, supporting both ends of the pair of horizontal guide rods only in the vertical direction. A pair of lateral adjustment springs interposed between both sides of the bearing block and the vertical guide rod to keep the bearing block at the center position in the left-right direction; and between the horizontal guide rod and the substrate. A rotary drive device for a pipe to be processed, comprising a pair of vertical adjustment springs interposed to keep the bearing block at a vertical center position. 2. The rotary driving device for a pipe to be processed according to claim 1, wherein the pair of screw rods attached to the large-diameter ring are rotatably engaged with one end of the screw rod in a horizontal position. A rotary drive device for a pipe to be processed, comprising a drive device. 3. A rotary driving device for a pipe to be processed according to claim 1, wherein a rotary transmission device is interposed between a pair of screw rods attached to a large-diameter ring. Rotation drive device for processing tube.