JP2002046054A - Polishing apparatus for end of line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polishing apparatus for removing poor weld materials by efficiently polishing the end of a line. SOLUTION: The polishing apparatus 1 includes a fixing portion 5 for fixing the end of the line 100; a polisher 6 for polishing the fixed end of the line; a rotation means 7 for rotating the polisher 6 about a rotating shaft; and a revolution means 8 for causing the polisher 6 to revolve in the circumferential direction of the line 100. The polisher 6 is caused to revolve in the circumferential direction as it rotates about its own axis to thereby polish the end of the line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus for polishing and removing rust, black scale, paint, and the like at the end of a pipe such as a steel pipe when welding the end.

[0002]

2. Description of the Related Art In general, straight pipes,
Elbow pipe (45 °, 90 °), tee pipe (same diameter, different diameter)
There are reducer pipes (concentric and eccentric), but when these pipes are connected by welding, it is necessary to remove in advance the substances that cause welding defects such as rust, black scale, and paint on the weld surface. is there. To remove such a causative substance, a polishing method is simple. However, conventionally, there is no apparatus for automatically and efficiently polishing, so that the polishing has been manually performed using a grinder or the like.

[0003]

However, such a manual method has a problem in that the working efficiency is low and unevenness in removal is apt to occur. In addition, since the polishing is performed in an unreasonable posture, the burden on the operator is large, and there is also a problem in the working environment such that the operator sucks in dust and the like generated during the polishing. Then, an object of the present invention is to solve the problem in the conventional polishing method, and an object of the present invention is to provide a new pipe end polishing apparatus for that purpose.

[0004]

That is, a polishing apparatus for a pipe end according to the present invention comprises a fixing portion for fixing a pipe end, a polishing body for polishing an end of the fixed pipe, and a polishing body for rotating the polishing body. The present invention is characterized in that it comprises a rotating means for rotating around the axis and a revolving means for revolving the abrasive body in the circumferential direction of the pipe (claim 1). The fixing unit in the polishing apparatus is a pair of holding units having a V-groove, a pair of plate-shaped attachments arranged in contact with the holding surface of each holding unit, and distributed to a plurality of positions corresponding to each holding unit. Pin holes provided by
A pin that penetrates the pin hole and supports the bottom surface of the pipe end can be provided.

In any of the above polishing apparatuses, a polishing body for polishing an outer peripheral surface of a pipe end, or a polishing body for polishing an inner peripheral surface of a pipe end and a groove of the pipe end are additionally provided as a polishing body. At least one of the polishing bodies to be polished can be provided (claim 3). Further, in any of the above polishing apparatuses, the polishing body can be configured to have a polishing surface that conforms to the shape of the end of the pipe.
Further, in any one of the above polishing apparatuses, it is possible to provide a positioning member for abutting and positioning the end surface of the pipe, and a moving means for moving the positioning member between a fixed position and a standby position of the pipe. . Further, in any one of the above polishing apparatuses, a pressing means for pressing the polishing body against the pipe end with a preset pressure can be provided (claim 6).

Further, in any one of the above polishing apparatuses,
A reciprocating means for reciprocating the polishing body in the axial direction of the fixed pipe can be provided. Further, in any one of the above polishing apparatuses, a control unit for setting and controlling the polishing conditions according to the condition of the pipe end can be provided. Further, in any one of the above polishing apparatuses, an end face polishing body for polishing the end face of the pipe is provided, and the end face polishing body is formed so as to be compressible when pressed against the end face of the pipe and supported by a support provided on the revolving means. (Claim 9).

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a polishing apparatus according to the present invention, and FIG. 2 is a plan view thereof. In these figures, a polishing apparatus 1 includes an apparatus main body 2 and a gantry 3 for supporting the same, and the gantry 3
Are provided with four casters 4 for movement. The apparatus main body 2 includes a fixing part 5 for fixing the end of the pipe 100 (in this example, a 90 ° elbow) at a predetermined position, and three polishing bodies 6 for polishing the end of the pipe 100 fixed to the fixing part 5. ,
A rotating means 7 for rotating each polishing body 6 and a revolving means 8 for revolving the polishing body 6 in the circumferential direction of the pipe 100 are provided. The three polishing bodies 6 include a polishing body 6a for polishing an outer peripheral surface of a pipe end, a polishing body 6b for polishing an inner peripheral surface, and a polishing body 6c for polishing a groove.

The revolving means 7 and the revolving means 8 are reciprocated or oscillated relative to the gantry 3 by the reciprocating moving means 9 in the horizontal direction (the axial direction of the end face of the pipe 100 fixed to the fixed portion 5). You. And the reciprocating means 9 is the rotation means 7
And a common slide body 10 to which the revolving means 8 is attached, and a drive unit 11 for sliding the slide body 10. In addition, as the drive unit 11, for example, a drive unit such as a reversible motor with a reduction gear can be used. Further, the apparatus main body 2 is provided with a dust collecting case 12 for sucking dust generated during polishing. The dust collecting case 12 can be opened and closed by a hinge (not shown), and is connected to a vacuum pump (not shown) by a hose 13.

The gantry 3 is provided with a moving means 14 such as a cylinder driven by pneumatic or hydraulic pressure, and its driving shaft 15
The positioning member 16 which abuts on the end face of the pipe 100 and positions it is fixed to the pipe. The positioning member 16 is formed of an elongated L channel, and is adapted to position the end surface of the pipe 100 by abutting on one surface thereof.
4 raises and lowers the positioning member 16 between the upper pipe fixing position and the lower standby position (as shown in FIG. 1).

FIG. 3 is a side view of the fixing portion 5 as viewed from the end face side of the pipe 100. As shown in this figure (and FIG. 2), the fixing portion 5 has a pair of holding portions 17 provided with a V-groove 18 in the horizontal direction, and a pair of plate-like members arranged in contact with the holding surface of the holding portion 17. It has an attachment 19. Each of the grips 17 is provided with a slide table 20 which is slidable in the axial direction on an LM guide 20a provided on the gantry 3.
Positioning and locking are performed in the axial direction using a cylinder (not shown) below the fixed portion 5. The distance between the grips 17 can be finely adjusted by rotating the operation handle 21 forward or backward. In this example, in order to fix the end of the pipe having an unstable shape such as an elbow, the attachments 1 arranged in contact with the gripping surfaces of the gripping portions 17 are provided.
At 9, both sides of the pipe end are gripped.

As shown in FIG. 1, a plurality of pin holes 22 are dispersedly provided on the pair of gripping portions 17 at the same positions facing each other. As shown in FIG.
, The bottom surface of the positioned piping 100 is supported. In this way, the end of the pipe having an unstable shape such as an elbow is stably fixed by the both sides supported by the attachment 19, the bottom support by the pin 23, and the positioning member 16. FIG. 4 shows a state in which the bottom surface of the pipe 100 is supported by the pins 23 for reference.

FIG. 5 is a side view of the case where the end of the pipe made of a straight pipe is fixed by the fixing part 5. Since the end of the pipe made of a straight pipe has a shape that can be fixed relatively stably, it is not necessary to use the attachment 19 and the pin 23 as shown in FIG. it can. FIG. 6 is a partial sectional view showing the rotation means 7 and the revolving means 8 in detail. The rotation means 7 and the revolving means 8 are provided on a slide body 10, and a long nut 24 is fixed to the slide body 10 as an example. Two ball screws 11a (only one is shown in FIG. 6) connected to the output shaft of the drive unit 11 (see FIG. 1) such as a reversible motor are screwed to the long nut 24, and the ball screw 11a The slide body 10 slides on the gantry 3 in the horizontal direction by the rotation of.

The rotating means 7 rotates the polishing bodies 6a, 6b, 6c at a predetermined number of rotations (rotational speeds) via gears. ), A holder 25a pivotally supported by a main shaft 25 which is a driving shaft of the driving unit, and a main shaft gear 2 fixed to the main shaft 25.
6. A rotating shaft 28 having a rotating gear 27 at one end that meshes with the main shaft gear 26, a timing pulley 29 provided at the other end of the rotating shaft 28, a timing belt 30, and a polishing shaft provided at a rear end of the timing pulley 31. 32 are sequentially connected, and the shaft of the polishing body 6 is detachably connected to the tip of the polishing shaft 32 via a chuck 33. In this transmission mechanism, reference numerals 39, 40, 41, 52, 53, and 54 denote bearings, respectively. In this example, the spindle 25 and the spindle gear 26
Are common, and the rotating gear 27, the rotating shaft 28, the timing pulley 29, the timing belt 30, the timing pulley 31, the polishing shaft 32, the chuck 33, etc.
6b and 6c are provided.

The revolving means 8 revolves the abrasive bodies 6a, 6b, 6c in the circumferential direction of the pipe. The revolving means 8 includes a driving unit 34 such as a motor with a reduction gear whose speed is controlled, and the revolving shaft 3 of the driving unit 34.
5, a revolving gear 36, a driven gear 37 meshing with the revolving gear 36, and a revolving casing 38 to which the driven gear 37 is fixed. The drive unit 34 is fixed to the slide body 10, and the revolution casing 38 is supported by the holder 25 a by a bearing 39. Each rotating shaft 28 constituting the rotation means 7 is supported by a revolving casing 38 by bearings 40 and 41, respectively. As the polishing bodies 6a, 6b, 6c, for example, those obtained by dispersing abrasive particles in a non-woven fabric and fixing them with an adhesive and molding them into a disk shape, a conical shape (tapered shape) or the like can be used. Polished body is 3M
(3M) is commercially available as a Scotch Bright CNS disc.

The polishing bodies 6a, 6b, 6c can be pressed against the end of the pipe by a pressing means 42 at a preset pressure. The pressing means 42 includes a double pipe 44 inserted through a through hole 43 provided along the axis of the main shaft 25, two air distributors 45 and 46 respectively connected to inner and outer pipes of the double pipe 44, Three rotary cylinders 47 (only one is shown) connected to distributors 45 and 46 by piping, three swing gears 49 meshing with rotary gears 48 fixed to drive shafts 47a of each rotary cylinder 47, and each swing gear It has three swing arms 51 eccentrically connected to 49 swing axes 50. Each of the swing shafts 50 is supported by a revolving casing 38 by a bearing 52, and the timing pulleys 29, 31 are supported by bearings 53, 54.
Respectively, and are pivotally supported by the swing arm 51.

FIG. 7 shows the polishing bodies 6a, 6b, 6 in FIG.
It is the front view which looked at the part of c from the piping 100 side. The illustrated abrasive bodies 6a, 6b, 6c are in a position where each rotary cylinder 47 of the pressing means 42 is not pressed, that is, in a standby position, and when each rotary cylinder 47 is pressed, the abrasive bodies 6a, 6b, 6c are Each pivots as indicated by an arrow and moves to a pressing position as shown in FIG. 8 (see FIG. 4). The polishing bodies 6a and 6b are pressed against the outer and inner peripheral surfaces of the pipe end, respectively, and the polishing body 6c is pressed against the groove at the pipe end. FIG. 8 shows only the polishing bodies 6a, 6b and 6c for explanation. On the front surface of the revolving casing 38, a support portion 38a formed of a dovetail groove extending in the radial direction is provided as shown in FIG. 7, and an end surface polishing body 55 for polishing a pipe end surface is slidably supported by the support portion 38a. The details will be described later.

FIG. 9 is a sectional view taken along the line AA of each rotary cylinder 47 in FIG. Each rotary cylinder 47 has a cylindrical body 56, a drive shaft 47 a pivotally supported in the body 56, a vane 57 extending radially from the drive shaft 47 a, and a stopper shoe 58 fixed in the body 56. Having. FIG. 9A shows an air distributor 45.
Shows a state in which pressurized air is supplied as shown by an arrow from a pipe 59 and exhaust gas is returned from the pipe 60 to the air distributor 46. The vane 57 rotates clockwise to contact the shoe 58 from the left side. Stop. FIG. 9B shows the air distributor 4 in reverse.
6 shows a state in which pressurized air is supplied through a pipe 60 as indicated by an arrow, and exhaust gas is returned from a pipe 59 to an air distributor 45.
The vane 57 rotates counterclockwise and contacts the shoe 58 from the right side and stops. When the vane 57 is rotated clockwise, the abrasive body 6a (6b, 6c) moves from the standby position of FIG. 7 to the pressing position, and when the vane 58 is rotated counterclockwise, the abrasive body 6a (6b , 6c) return from the pressed position to the standby position.

Referring again to FIG. 6, the double pipe 44 is connected to control valves (91, 92) controlled by a control section (80), which will be described later, and drives each rotary cylinder 47 as shown in FIG. 9 (a). At this time, in this example, pressurized air is supplied from the outer pipe to the air distributor 45, and exhaust air from the air distributor 46 is discharged from the inner pipe to the outside. Conversely, when each rotary cylinder 47 is driven as shown in FIG.
6 is supplied with pressurized air, and the exhaust air from the air distributor 45 is discharged from the outer tube to the outside. Then, the abrasive body 6a (6b, 6)
Since the pressing force of c) is proportional to the pressure of the pressurized air supplied from the air distributor 45, the polishing body 6a
The pressing force of (6b, 6c) can be adjusted.

FIG. 10 is a detailed view of the end face polishing body shown in FIG. The end surface polishing body 55 includes the holder 61 and the polishing section 6.
The holder 61 includes a projection 63 provided on the revolving casing 38 and engaging with a support portion 38a having a dovetail groove like a ginkgo leaf, and a pair of parallel support plates 64 provided with two bolt holes. And a pair of flanges 65 extending left and right. The polishing unit 62 is inserted into the pair of support plates 64,
It is detachably attached to the holder 61 by two fixing bolts 66 on the left and right sides. After the holder 61 is positioned by engaging the projection 63 with the support portion 38 a, the holder 61 is fixed to the revolving casing 38 using a bolt hole provided in the pair of flanges 65 so as not to slide with the fastening bolt 67.

The polishing section 62 includes a block-shaped base 68, a cushion body 69 such as a sponge bonded to the base 68 by adhesion or the like, and a surface (front surface and both side surfaces) of the cushion body 69.
And a base layer 68 made of a hard material such as wood or plastic.
6 is provided with a bolt hole for screwing. Polishing layer 70
For example, sandpaper can be used, and it can be attached to the surface of the cushion body 69 with an adhesive or the like. It may be detachably wound. In this manner, the end surface polishing body 55 is
When it is hooked on the support portion 38a provided at a predetermined position and fixed at a predetermined position with the fastening bolt 67, the polishing layer 70 on the front surface side of the cushion body 69 faces the pipe end surface as shown in FIG. When the polishing layer 70 is worn, the polishing section 62 is replaced as a unit.

When the fixed portion to which the pipe 100 is fixed is moved in the axial direction by using a moving means (not shown), the polishing layer 7
0 contacts and presses the pipe end face. When the revolution casing 38 is rotated in this state, the polishing layer 70 grinds the pipe end face while moving in the circumferential direction along the revolution casing 38. At that time, even when the smoothness of the pipe end face is poor, the pressing force can be maintained in a predetermined range by the compression action of the cushion body 69. When such an end surface polishing body 55 and a tapered abrasive are used, no swing vibration is performed.

FIGS. 11 to 15 show examples in which the shape and the like of the polishing bodies 6a to 6c or the end face polishing body 55 to be used are changed depending on the shape of the pipe end and the portion to be polished. When the end face of the straight pipe 100 is flat and the inner and outer peripheral faces and the end face are polished, the disc-shaped polishing bodies 6a and 6b as shown in FIG. 55 can be used. Also, a pipe 100 composed of a straight pipe
An oblique groove is formed on the outer periphery of the end of the inner peripheral surface,
When the groove and the end face are polished, disc-shaped polishing bodies 6a and 6b, a tapered polishing body 6c, and an end face polishing body 55 can be used as shown in FIG. Further, a slanted groove is formed at the inner and outer periphery of the end of the pipe 100 composed of a straight pipe, and when the outer peripheral surface, the inner and outer groove and the end surface are polished, as shown in FIG. , Tapered polishing bodies 6b, 6
An end surface polishing body 55 adapted to the shape of c and its end surface can be used. In any of the above cases, the piping 10
The same applies to the case where 0 is other than a straight pipe.

FIGS. 14 and 15 show an example in which a groove is formed at the end of the pipe, and the groove is polished by the end surface polishing body 55. FIG. FIG. 14 shows a case in which a slanted groove is formed on the outer periphery of the end of the pipe 100 made of an elbow, and when the inner and outer peripheral surfaces, the groove and the end surface are polished, the disk-shaped abrasive body 6a,
6b, and an end surface polishing body 55 having two polishing surfaces, a linear surface and a tapered surface. FIG. 15 shows oblique grooves formed at the inner and outer peripheries of the end of the pipe 100 made of an elbow.
When the inner and outer peripheral surfaces and the inner and outer grooves are polished, disc-shaped polishing bodies 6a and 6b and an end surface polishing body 55 having two polishing surfaces of a tapered surface are used. 14 and FIG.
Even in the case of 5, the same can be applied even if the pipe 100 is other than the elbow.

FIG. 16 is a block diagram for explaining a control unit for setting and controlling the polishing conditions in accordance with the situation at the end of the pipe. As the control unit 80, for example, a computer device or a sequencer can be used. The illustrated control unit 80 uses a computer device, and includes a CPU (Central Processing Unit) 8.
1, a storage unit 82, an input unit 83 such as a keyboard, and a display unit 84 such as a monitor. The CPU 81 controls the drive unit 85 such as a motor with a reduction gear in the rotation means 7 via an interface device 81a, such as a controller 86 such as a thyristor device, a controller 87 which controls the drive unit 34 of the revolving means 8, and a slide body 10. A controller 88 for controlling the driving unit 11 for driving, a moving unit 1 for moving the positioning member 16
The control valve 89 controls the four-way control valve 89 and the two three-way control valves 91 and 92 that control the supply of the pressurized air set by the pressure setting unit 90 to the double pipe 44. Controller 8
6, 87 and 88 can be constituted by a thyristor control device or the like, and the pressure setting section 90 can use a pressure regulator or the like which can remotely set the pressure from the CPU 81.

Next, the operation of the above polishing apparatus will be described. First, an abrasive body 6 to be used as shown in FIGS.
a to 6c and the end surface polishing body 55 are selected. Polished bodies 6a-6
When one or two of c are not used, the polishing body is removed from the polishing shaft 32 (FIG. 6) at the chuck 33 portion.
Further, the polishing conditions, that is, the rotation speed, the polishing time (revolution time), the polishing width, and the like of the polishing bodies 6a to 6c are set in accordance with the condition of the end of the pipe to be polished (such as the surface properties). These conditions can be determined by experiments and the like. The settings are input to the CPU 81 of the control unit 80 shown in FIG.
The setting is performed by inputting the respective set values from and storing them in the storage unit 82. It should be noted that the CPU 81 includes a drive section 85 of the rotation means 7, a drive section 34 of the revolving means 8, a drive section 11 for driving the slide body 10, etc. Programs are also input from the input unit 83, and are stored in the storage unit 8
2 is stored.

After the necessary polishing conditions and the like are set in the control unit 80 as described above, the dust collecting case 12 is opened, the end of the pipe to be polished is positioned and fixed by the fixing unit 5. That is, FIG.
To move the positioning member 16 to the position indicated by the dashed line and move the end face of the pipe 100 to the positioning member 1.
6 and positioned. Next, in this state, the pipe end is fixed by the fixing portion 5. For example, in the case of an elbow, FIG.
As shown in the figure, the both ends in the horizontal direction of the pipe end are gripped by the gripping portion 17 via the attachment 19, and the bottom surface is supported by the pins 23.

Next, the dust collection case 12 is closed, a vacuum pump (not shown) is started, and a start switch (not shown) is operated to put the control unit 80 into an operating state to start polishing. The control unit 80 first outputs a control command to the controller 88, moves the slide body 10 toward the pipe end, and stops at a predetermined position. Next, the control unit 80 outputs a control command to the controller 86 to rotate the polishing bodies 6a and 6b at the set rotation speed, and also drives the control valve 91 and controls the control valve 92.
Is output, and the pressurized air set by the pressure setting unit 90 is supplied to the air distributor 45. As a result, the polishing body 6a moves to the polishing position on the outer peripheral surface of the pipe end, and the polishing body 6b moves to the polishing position on the inner peripheral surface of the pipe end, and starts polishing while pressing each polishing surface.

At the same time, the control section 80 outputs a control signal to the controller 87 and drives the drive section 34 of the revolving means 8 to rotate the revolving casing 38. As a result, the rotating polishing bodies 6a and 6b sequentially grind the outer peripheral surface and the inner peripheral surface to be polished while moving at a constant speed set in the circumferential direction of the pipe end. If the polishing width in the axial direction of the outer peripheral surface and the inner peripheral surface of the pipe end to be polished is larger than the width of the polishing bodies 6a and 6b, the control unit 80 further outputs a control signal to the controller 88, and The drive unit 11 is rotated forward and backward at a predetermined cycle so that is reciprocated at a predetermined swing width. Thereby, the inner and outer peripheral surfaces of the pipe 100 are polished to a desired width in the axial direction. Even when the surface to be polished is a rough surface, a uniform polishing can be obtained by swinging operation, and uneven consumption of the polishing body can be prevented. Piping 10
Even when 0 is an elbow, when the polishing body is swung in the axial direction of the pipe 100, the polishing body can be smoothly swung along the curved surface of the pipe 100 by the pressing force of the pressing means 42.

If it is necessary to grind the end face of the pipe at the same time, the end face polished body 55 may be engaged with the support portion 38a of the revolving casing 38 in advance, as described above.
Is moved to a predetermined position, the end face polishing body 55 contacts and presses the pipe end face, and follows the rotation of the revolving casing 38 to sequentially grind the pipe end face in the circumferential direction. When the time set by the timer comes, the revolution casing 38 returns to the home position, and the polishing operation of the pipe end is completed. The state is detected by a position sensor (not shown) or the like, and upon receiving the state, the control unit 80 stops the rotation of the polishing bodies 6a and 6b and the revolving casing 38, and controls the control valve 9
1 is not driven, and a control signal for driving the control valve 92 is output to return the polishing bodies 6a and 6b to the standby position. Thus, the automatic polishing control by the control unit 80 ends. When the rotation of the revolution casing 38 stops, polishing of the pipe end face by the end face polishing body 55 also automatically stops.

In the embodiment described so far, the polishing body 6
A polishing body 6a for polishing an outer peripheral surface of a pipe end, a polishing body 6b for polishing an inner peripheral surface of a pipe end, a polishing body 6c for polishing a groove at a pipe end, and an end surface polishing body 55 for polishing a pipe end face.
Are all provided. However, the polishing apparatus of the present invention is not limited to this, and may be provided with only the polishing body 6a for polishing the outer peripheral surface of the pipe end, or may be provided with the polishing body 6b for polishing the inner peripheral surface of the pipe end. One of the polishing bodies 6c for polishing the groove of the portion may be provided, and the end surface polishing body 55 may be provided in any of those cases.

[0031]

As described above, the polishing apparatus of the present invention comprises a fixing portion for fixing a pipe end, a polishing body for polishing an end of the fixed pipe, and a polishing body rotating around its rotation axis. A rotating means for rotating the polishing body and a revolving means for revolving the abrasive body in the circumferential direction of the pipe are provided, and the end of the pipe can be efficiently and uniformly polished to remove poor welding substances.
In the above-mentioned polishing apparatus, the fixing part is distributed to a pair of holding parts having a V-groove, a pair of plate-like attachments arranged in contact with the holding surface of each holding part, and a plurality of corresponding positions of each holding part. And a pin that penetrates the pin hole and supports the bottom surface of the pipe end, whereby both the straight pipe and other unstable pipe ends such as elbows can be provided. Can be fixed stably.

In any of the above-mentioned polishing apparatuses, the polishing body for polishing the outer peripheral surface of the pipe end, or the polishing body for polishing the inner peripheral surface of the pipe end and the groove of the pipe end are additionally used as the polishing body. At least one of the polishing bodies to be polished can be provided, whereby the inner and outer peripheral surfaces and the groove surface of the pipe end can be polished at the same time. In any one of the above-described polishing apparatuses, the polishing body can be configured to have a polishing surface that conforms to the shape of the pipe end, so that the polishing operation is performed when a groove or the like is formed at the pipe end. This also makes it possible to use the polishing apparatus of the present invention. In any one of the above polishing apparatuses, it is possible to provide a positioning member that contacts and positions the end surface of the pipe, and a moving unit that moves the positioning member between a fixed position and a standby position of the pipe. Can be accurately and quickly positioned and fixed to the polishing apparatus.

In any one of the above polishing apparatuses, a pressing means for pressing the polishing body against the end of the pipe at a predetermined pressure can be provided, and the polishing can always be performed with a constant pressing force. , More stable and uniform polishing can be performed. In any one of the above polishing apparatuses, reciprocating means for reciprocating the polishing body in the axial direction of the fixed pipe can be provided. Along with the width in the direction, uniform polishing can be performed even if the polished portion is a rough surface.

In any one of the above-mentioned polishing apparatuses, a control unit for setting and controlling the polishing conditions according to the condition of the pipe end can be provided, whereby optimum polishing is performed according to the properties of the pipe end. It becomes possible. In any one of the above-described polishing apparatuses, an end surface polishing body for polishing an end surface of the pipe is provided, and the end surface polishing body is formed to be compressible when pressed against the end surface of the pipe and supported by a support provided on the revolving means. The end face of the pipe can be polished at the same time.

[Brief description of the drawings]

FIG. 1 is a front view of a polishing apparatus according to the present invention.

FIG. 2 is a plan view of the polishing apparatus of FIG. 1;

FIG. 3 is a side view of the fixing portion 5 of FIG.

FIG. 4 is an enlarged front view showing a state in which the bottom surface of the pipe 100 of FIG. 1 is supported by pins 23;

FIG. 5 is a side view of a state in which a pipe 100 composed of a straight pipe is fixed by a fixing portion 5 as viewed from an end face side.

FIG. 6 is a partial sectional view showing details of a rotation means 7 and a revolving means 8 in FIG. 1;

7 is a front view of the polishing bodies 6a, 6b, 6c in FIG.

FIG. 8 is a front view of the polishing bodies 6a, 6b, and 6c at the pressing position when viewed from the pipe 100 side.

FIG. 9 is a sectional view of the rotary cylinder 47 taken along line AA in FIG. 6;

FIG. 10 is a perspective view of an end surface polishing body 55.

FIG. 11 is an explanatory view showing a state in which a pipe end is polished using the polishing bodies 6a and 6b and the end surface polishing body 55.

FIG. 12 shows polishing bodies 6a, 6b, 6c and end face polishing bodies 5
Explanatory drawing of the state which grinds the piping end part using 5, FIG.

FIG. 13 shows polishing bodies 6a, 6b, 6c and end face polishing body 5
Explanatory drawing of the state which grinds the piping end part using 5, FIG.

FIG. 14 is an explanatory view of a state in which a pipe end is polished using the polishing bodies 6a and 6b and the end face polishing body 55.

FIG. 15 is an explanatory view of a state in which a pipe end is polished using the polishing bodies 6a and 6b and the end face polishing body 55.

FIG. 16 is a block diagram illustrating a control unit 80 that sets and controls polishing conditions in accordance with the condition of a pipe end.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 polishing apparatus 2 apparatus main body 3 gantry 4 caster 5 fixing part 6 polishing body 6a polishing body 6b polishing body 6c polishing body 7 rotating means 8 revolving means 9 reciprocating moving means 10 slide body 11 driving section 11a ball screw 12 dust collecting case 13 hose 14 Moving means 15 drive shaft 16 positioning member 17 gripping part 18 V-groove 19 attachment 20 slide base 20a LM guide 21 operation handle 22 pin hole 23 pin 24 long nut 25 main shaft 25a holder 26 main shaft gear 27 rotation gear 28 rotation shaft 29 timing pulley 30 Timing belt 31 Timing pulley 32 Polishing shaft 33 Chuck 34 Drive unit 35 Revolution shaft 36 Revolution gear 37 Follower gear 38 Revolution casing 38a Support unit 39 Bearing 40 Bearing 41 Bearing 42 Pressing means 43 Through hole 44 Double pipe 4 Air distributor 46 Air distributor 47 Rotary cylinder 47a Drive shaft 48 Rotating gear 49 Swing gear 50 Swing shaft 51 Swing arm 52 Bearing 53 Bearing 54 Bearing 55 End polishing body 56 Body 57 Vane 58 Shoe 59 Piping 60 Piping 61 Holder 62 Polishing part 63 Projection 64 Support plate 65 Collar body 66 Fixing bolt 67 Fastening bolt 68 Base 69 Cushion body 70 Polishing layer 80 Control unit 81 CPU 81a Interface device 82 Storage unit 83 Input unit 84 Display unit 85 Drive unit 86 Controller 87 Controller 88 Control Container 89 Control valve 90 Pressure setting unit 91 Control valve 92 Control valve 100 Piping

Continued on the front page (72) Inventor Tadashi Washizuka 5-37-1, Kamata, Ota-ku, Tokyo Toshiba Plant Construction Corporation (72) Inventor Masaaki Obata 2-13-16 Yaguchi, Ota-ku, Tokyo Imaizumi Co., Ltd. Abrasive material firm F-term (reference) 3C034 AA13 AA19 BB22 BB26 BB75 3C043 BC02 CC03 CC11 DD02 3C058 AA03 AA04 AA11 AA16 AA18 AB04 CA01 CB03

Claims (9)

[Claims] 1. A fixed portion (5) for fixing a pipe end, a polishing body (6) for polishing the fixed pipe end, and a rotating means for rotating the polishing body (6) around its rotation axis. (7) and abrasive body
Revolving means (8) for revolving (6) in the circumferential direction of the pipe (100);
A polishing apparatus for a pipe end, comprising: The fixing portion (5) has a pair of holding portions (17) having a V-shaped groove (18), and a pair of plate-like attachments (17) arranged in contact with the holding surfaces of the holding portions (17). 19), and pin holes (22) dispersedly provided at a plurality of positions corresponding to each gripping portion (17), and pins that pass through the pin holes (22) and support the bottom surface of the pipe end.
The pipe end polishing apparatus according to claim 1, further comprising (23). 3. A polishing body (6a) for polishing an outer peripheral surface of a pipe end, or a polishing body (6b) for polishing an inner peripheral surface of a pipe end in addition to the polishing body (6b). The apparatus for polishing a pipe end according to claim 1 or 2, wherein the polishing apparatus comprises at least one of a polishing body (6c) for polishing a groove. 4. The pipe end polishing apparatus according to claim 1, wherein the polishing body has a polishing surface conforming to the shape of the pipe end. 5. A positioning member (16) for positioning by contacting an end face of a pipe (100), and a moving means (14) for moving the positioning member (16) between a fixed position and a standby position of the pipe. The apparatus for polishing a pipe end according to any one of claims 1 to 4, wherein 6. A polishing apparatus for a pipe end according to claim 1, further comprising a pressing means (42) for pressing the polishing body (6) against a pipe end with a predetermined pressure. . 7. An abrasive body in the axial direction of the fixed pipe (100).
7. The apparatus for polishing a pipe end according to claim 1, further comprising a reciprocating means (9) for reciprocating (6). 8. The apparatus for polishing a pipe end according to claim 1, further comprising a control section (80) for setting and controlling the polishing conditions according to the condition of the pipe end. 9. An end face polishing body (55) for polishing an end face of a pipe is provided. The end face polishing body (55) is formed so as to be compressible when pressed against the end face of the pipe and provided on a revolving means (8). 9. The apparatus for polishing a pipe end according to claim 1, which is supported by a support portion (38a).