JPH07276202A - Chamfering device for the outer circumference of the pipe end - Google Patents

Abstract

(57) [Abstract] [Purpose] Even though it is a simple device, the lowering position of the grinding tool is always set, so it is possible to perform chamfering work corresponding to pipes having various outer diameters. Provided is a chamfering device for the outer periphery of a pipe end, which can chamfer while following the deformed outer peripheral surface of the pipe body. [Structure] A main rod 1 is fixed to a vertically movable rod 21 below a cylinder 2 in parallel with the longitudinal direction of a chamfered pipe body 8, and a first downward supporting rod 11 is provided near the central portion of the main rod 1.
Is provided on the side opposite to the first supporting rod 11 with respect to the rod 21, and the upper portion of the second supporting rod 12 whose lower end is lower than the lower end of the first supporting rod 11 is mounted. It is worn. The rotation drive device 3 is attached to the lower ends of the first support rod 11 and the second support rod 12. A cylindrical grinding tool 4 is provided on a rotary shaft 31 of the rotary drive device 3 on the side of the first supporting rod 11. A roller support rod 15 is attached near the other end of the main rod 1, and a driving roller 16 is provided at the lower end of the roller support rod 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering device for chamfering the outer periphery of a pipe end, and can efficiently chamfer pipes having various outer diameters.

[0002]

2. Description of the Related Art Conventionally, an apparatus as shown in FIG. 4 has been used for chamfering the outer circumference of a pipe end. In FIG. 4, one end of a supporting rod 10 laterally fixed to a rod 21 of a cylinder 2 that can move up and down is provided with a downward-fixing rod 1.
1, an angle adjusting rod 12 is provided at the other end so as to be movable up and down, a lower end of the angle adjusting rod 12 is located lower than a lower end of the fixed rod 11, and a disk-shaped rotary grinding tool is provided at the front. 41
The front of the rotary drive device 3 including the rotary drive device 3 is at the lower end of the fixed rod 11, the rear part of the rotary drive device 3 is at the lower end of the angle adjusting rod 12, and the front part having the rotary grinding tool 41 is at a high position. , 6 and are attached.

In front of the rotary grinding tool 41, a roller support rod 15 having a roller 16 at its lower end is provided with a cylinder 20.
It is fixed to the tip of the rod 18. The tube body 8 is supported by the support roller 7 from both sides of the roller 16 and below the roller 16 and rotates.

In order to chamfer the pipe body 8, the pipe body 8 is supplied onto the support roller 7, the upper end of the pipe end is brought closer to the lower part of the rotary grinding tool 41, and the rod 18 of the cylinder 20 is lowered to lower its lower end. The roller 16 of the part is applied to the upper surface of the tube body 8, and the tube body 8 is rotated about the tube axis.

Next, the rod 21 of the cylinder 2 is lowered, and the rotary grinding tool 41 is pressed against the pipe body 8 to be chamfered to a predetermined position while being pushed down, and then the rod 20 and the rod 21 are raised to raise the grinding tool 41 and the roller 16. Is separated from the surface of the tubular body 8.

[0006]

In the above-mentioned conventional apparatus, the roller support rod 15 provided with the roller 16 for supporting and rotating the tube body 8 is based on the vertical movement of the rod 18, while the outer circumference of the tube end portion is provided. Grinding tool 41 for chamfering
Is moved by moving the rod 21 of the cylinder 2 up and down. Therefore, two sets of cylinders are required. Further, the lowered positions of the roller 16 and the grinding tool 41 must be adjusted separately and fixed with a lock nut or the like.

Since the grinding tool 41 and the roller 16 are separated from each other, the roller 16 and the two support rollers 7 follow the deformation of the surface of the tube body 8 when the outer peripheral surface of the tube is not an accurate circle, for example. However, even if it is supported and rotated, the grinding tool 41 cannot follow this deformation because it chamfers while pressing the outer periphery of the pipe end portion with a constant pressing force irrelevant to the pressing force of the roller 16. For this reason, a constant chamfer width cannot be secured in the ground portion, and the chamfer width varies. For this reason, there is a problem that it becomes difficult to perform work when using a chamfered pipe.

The present invention solves the above-mentioned problems of the prior art, and since the lowering position of the grinding tool is always set in spite of being a simple device, chamfering work can be performed correspondingly to pipes having various outer diameters. Further, since the chamfering can be performed while following the deformed outer peripheral surface of the tubular body, it is an object of the present invention to provide a chamfering device for the outer peripheral portion of the pipe end which can perform chamfering with a constant width.

[0009]

A chamfering device for the outer circumference of a pipe end of the present invention is a device for chamfering the outer circumference of a pipe end, and is a first supporting rod in the middle of a main rod provided on an elevating device. , A second supporting rod is provided on one of the main rods, and a roller supporting rod is provided on the other of the main rods toward the axis of the pipe, and has a cylindrical rotary chamfer at one end. Of the rotary chamfer is attached to the end of the first supporting rod, and the other end is attached to the end of the second supporting rod, and the chamfer of the rotating chamfer is chamfered, and a roller is attached to the end of the roller supporting rod. It is characterized by being provided.

The first supporting rod and the second supporting rod are provided so as to face the shaft of the pipe to be chamfered, and one of these is provided at an appropriate position with respect to the main rod by, for example, a pin and a pin hole. If lockable, the angle of the rotary drive can be selected. If the front part and the rear part of the rotary drive device are attached to the lower ends of the first support rod and the second support rod via hinges,
This is preferable because it is easy to move the second supporting rod up and down to adjust the angle of the rotary drive device. The chamfer angle is changed by changing the angle of the rotary drive. This angle adjustment range is about 15 to 30 degrees from the horizontal.

The lower end of the roller of the roller support rod, which is provided on the other side of the main rod toward the pipe axis, is in contact with the uppermost portion of the pipe outer diameter to be chamfered, and the lower surface of the grinding tool is 15 to 15 mm from the horizontal line.
The pipe is brought into contact with the outer circumference of the pipe end with an inclination of 30 degrees down. The chamfered tube is supported by a plurality of rollers or the like which are driven or not driven below the corresponding rollers as in the conventional case, and are sandwiched between these rollers and the above rollers to prevent the axis of the tube from being changed. Rotate as the center.

The roller at the lower end of the roller support rod descends as the main rod descends and contacts the outer surface of the pipe, but the rod further descends and the lower surface of the grinding tool is pressed against the outer periphery of the pipe end surface.
This extra descending distance is up to the position when the chamfering work is completed. Therefore, since the grinding tool is strongly pressed against the outer circumference of the tube end portion by the excessive lowering, at least a part of the device is slightly deformed. However, this amount of deformation is very small, and it is a short time of several seconds, so there is no problem in the structure of the device.

In this state, the tube is rotated about its axis, and the grinding tool is also rotated about its axis to chamfer the outer circumference of the tube end surface, so that the restoring force against the deformation is reduced. When the chamfering for a predetermined amount is completed, the above restoring force is canceled. That is, since grinding is not performed any more, there is no problem of excessive cutting. After the chamfering is completed, the rod moves up, and the grinding tool and the roller also move up.

Since the roller supporting the tube and rotating it and the rotary drive equipped with the grinding tool are integrally joined by the main rod, the surface shape of the tube traced by the roller is as it is. Appears in the movement of the grinding tool. Therefore, even if the outer peripheral surface of the tubular body is deformed, chamfering can be performed while following the deformation, so that chamfering can be performed with a constant chamfering width.

In FIG. 1, the chamfering device of the present invention is arranged above the pipe body 8 and the end portion of the pipe is ground at the upper part, but it is arranged below the pipe body 8. , Rod 2
1 may be moved upwards and the grinding tool 4 may be pressed against the lower part of the pipe end to grind the pipe end at the lower part, or it may be arranged horizontally to grind the pipe end from the lateral direction. You may do it.

[0016]

[Operation] The roller at the lower end of the roller supporting rod descends as the main rod descends to come into contact with the outer surface of the pipe, and the rod further descends to the position where the chamfering work is completed, and the lower surface of the grinding tool is pressed against the outer periphery of the pipe end surface. . Therefore, when the grinding tool is rotated around its axis while being strongly pressed against the outer circumference of the pipe end due to the excessive lowering, the outer peripheral surface of the pipe end is chamfered by a predetermined amount. Moreover, even if the outer peripheral surface of the tubular body is not an accurate circle and is deformed, chamfering can be performed while following the deformation, so that chamfering can be performed with a constant chamfering width.

Since the lowering positions of the roller and the grinding tool are always set, it is not necessary to set the lowering position, and the chamfering corresponding to the pipes having various outer diameters is a simple device. Can work. Further, even if the outer peripheral surface of the tubular body is deformed, the chamfering can be performed while following the deformation, so that the chamfering can be performed with a constant chamfering width.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the chamfering device for the outer circumference of the pipe end of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of a chamfering device for the outer circumference of a pipe end portion of the present invention, and a cylinder 2
The main rod 1 is fixed in parallel to the longitudinal direction of the pipe body 8 on which the main rod 1 is chamfered, and a downwardly extending first supporting rod 11 is provided in the vicinity of the central portion of the main rod 1. 21
The upper part of the second supporting rod 12 is attached to the side opposite to the first supporting rod 11, and both the first supporting rod 11 and the second supporting rod 12 are chamfered. It will be directed to 80.

The lower end portion of the second support rod 12 has a first support rod 11
The height is lower than the lower end of the main rod 1, and the line connecting both lower ends can be changed within a range of about 15 to 30 degrees with respect to the main rod 1. Pin holes 13a and 13b are provided in the upper portion of the second support rod 12, and the pin 14 is inserted into one of the pin holes 13a to maintain the height of the lower end portion. By replacing the pin 14 with the other pin hole 13b, the height of the lower end can be changed to set the angle within the above range.

An attachment plate 5 is attached to the lower ends of the first support rod 11 and the second support rod 12 via hinges 6 and 6, respectively, and the rotation drive device 3 is attached to the lower surface of the attachment plate 5. Is attached. Therefore, the rotary drive device 3 can also be adjusted within a range of 15 to 30 degrees with respect to the main rod 1 with the first supporting rod 11 side being a high position. A cylindrical grinding tool 4 is provided on the first support rod 11 side of the rotary drive device 3, that is, on the rotary shaft 31 on the high position side.

A roller support rod 1 is provided near the other end of the main rod 1.
5 is attached to the tube shaft 80, and the roller support rod 15
The lower end of the is provided with a driving roller 16,
The height of the lower end of the roller 16 is in the range of the height of the grinding surface of the grinding tool 4.

FIG. 2 is a sectional view taken along the line II-II of FIG. 1, in which two supporting rollers 7, 7 which also drive the roller 16 are arranged below the roller 16, and the tubular body 8 is formed by these three rollers. Are supported in the horizontal direction and are rotated in the axial direction by driving the three rollers.

Next, the operation of the chamfering device will be described.
When the tube body 8 is supplied onto the driving supporting rollers 7, 7, the tube body 8 starts to rotate about the axis. Next rod 21
When the driven roller 16 comes in contact with the upper surface of the tube body 8, the tube body 8 is supported by the above three rollers 16, 7, and 7 and rotates.

Since the roller 16 which supports the tubular body 8 and rotates the same and the rotary drive device 3 having the grinding tool 4 are integrally joined by the main rod 1, the grinding tool descended together with the roller 16. No. 4 contacts the outer circumference of the pipe end and starts grinding. FIG. 3 is a side view for explaining the movement of the grinding tool 4, in which the rod 16 further comes down by h in FIG. 3 after the roller 16 contacts the upper surface of the tubular body 8. By this excessive lowering, the grinding tool 4 is strongly pressed against the outer circumference of the pipe end portion, so that the device receives stress due to this, and any part is slightly deformed and the above stress is absorbed.

The grinding tool 4 is further lowered by the above-mentioned h, and therefore, due to the restoring force against the deformation of the device, the chamfering is continued while pressing the ground portion of the tubular body 8, and the restoring force is eliminated when the grinding surface 82 is chamfered. The chamfering work is completed. The rod 21 rises again and the grinder 4 and the roller 16 separate from the tube 8.

Since the second support rod 12 is attached so as to be able to move up and down, the inclination angle of the rotary drive device 3 is changed by moving it up and down to adjust the height, and the chamfer angle can be selected. . Since the grinding tool 4 is chamfered by the cylindrical grinding tool 4 which rotates in the axial direction by using the rotation driving device 3, the grinding tool is downsized, and the chamfered surface is more clean because the grinding is performed by line contact than the conventional flat grinding tool. Is finished.

Since the roller 16 and the grinding tool 4 are connected and integrated by the main rod 1, the cylinder and rod are
Only need one. Also, it can be used as it is for pipes with various outer diameters.
There is no need to adjust the working range for different outer diameters.

[0028]

The chamfering device for the outer periphery of the pipe end portion of the present invention has the above-described structure. Since the roller and the grinding tool are integrally connected by the main rod, the height positions of them are always set. Since it is not necessary to separately set the descending position, it is possible to perform chamfering work corresponding to tube bodies having various outer diameters while using a simple device. Further, even if the outer peripheral surface of the tubular body is deformed, the chamfering can be performed while following the deformation, so that the chamfering can be performed with a constant chamfering width.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a chamfering device for an outer circumference of a pipe end portion of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a side view for explaining the movement of the grinding tool.

FIG. 4 is a side view showing a conventional chamfering device.

[Explanation of symbols]

 1: Main rod 2: Cylinder 3: Rotary drive device 4, 40, 41: Rotating grinding tool 5: Attachment plate 6: Hinge 7: Support bearing 8: Tubular body 11: First support rod 12: Second support Rod 15: Bearing support rod 16: Roller 21: Rod 31: Rotating shaft 80: Pipe axis 81: Pipe end surface 82: Grinding surface

Claims (1)

[Claims] 1. A device for chamfering the outer circumference of a pipe end, wherein a first supporting rod is provided in the middle of a main rod provided on the lifting device.
A second supporting rod is provided on one of the main rods, a roller supporting rod is provided on the other of the main rods, respectively, facing the axis of the pipe, and a rotary drive device having a cylindrical rotary chamfer at one end is rotated. The chamfering tool side is attached to the first supporting rod end portion, the other side is attached to the second supporting rod end portion, and the rotary chamfering tool is chamfered at an angle.
A chamfering device for the outer circumference of the pipe end, wherein a roller is provided at the end of the roller support rod.