JPS6361140B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is a pipe end face polishing method for removing burrs, etc. generated on the end face of a pipe such as a steel pipe when the pipe is cut, and polishing the end face. It is related to the device.

When pipes such as steel pipes are cut, burrs that occur on the end surface of the pipe are removed and the end surface is polished.Pipe end surface polishing is conventionally performed by manually removing burrs and polishing using tools such as files. This method, which is commonly used, places a pipe cut to a specified size on a workbench, and a worker uses a file or other tool to remove the outer and inner burrs from the end of the pipe one by one. Since it was a manual process, it was not only extremely inefficient, but also had drawbacks such as poor surface finish.

Recently, a cylindrical wire brush that rotates at high speed is brought into contact with the inner and outer surfaces of the end of the pipe to automatically and continuously remove the burrs, as disclosed in Fig. 1 and Japanese Patent Application Laid-open No. 54-2591. A method for removing and polishing the end face has been developed, but since this method is carried out in a dry manner, (1) the end face of the pipe and the brush may fuse together due to the occurrence of polishing; The burr cannot be removed and burrs remain on the end face (2) The brush wears quickly and must be replaced from time to time (3) The end face is damaged by the brush and burrs occur (4) ) When using iron brushes, etc., there are disadvantages such as brush dust generated by abrasion with the pipes adhering to the heat-generating pipes and becoming rust later. Since the brush only rotates in one direction, the tip of the brush does not come into uniform contact with the end surface of the pipe, so only a portion of the brush wears out, resulting in a very short lifespan.

The present invention eliminates such drawbacks, and includes a plurality of annular brush discs attached to the tips of the pipes, such as steel pipes, for removing burrs generated on the end faces of the pipes and polishing the end faces by bringing them into contact with the end faces of the pipes. By creating a structure in which the wire brush revolves and rotates on its own axis, the wear of the tip of the wire brush is made uniform, and processing fluid is sprayed onto the wire brush to prevent mutual contact between the end surface of the pipe and the brush due to the heat generated during polishing. This prevents fusing of the brushes, reduces wear on the brushes, prevents damage to the end faces caused by the brushes, and prevents the generation of powder on the brushes, allowing for efficient polishing with inexpensive brushes and a beautiful finish on the end faces. The present invention provides an apparatus for polishing the end surface of a pipe.

More specifically, the present invention includes a disc-shaped rotary disk fixed to one end of a sun shaft supported by a support base and rotated by a drive device, and having a predetermined distance from the sun shaft. A plurality of planetary gears and a first gear are rotatably attached to a rotary disk surrounding the sun axis and are fixed to a planetary axis whose axis is on a circular orbit centered on the axis of the sun axis. , a second gear whose axis is parallel to the axis of the planetary shaft and which is fixed to a plurality of rotatably provided brush mounting shafts on the rotary disk and meshes with the first gear; and a second gear mounted on the rotary disk. A fixing member that is fixed to the inner circumferential surface of the drive device side end of a cylindrical fixed plate that houses the gear group and is fixed to the support base and meshes with the planetary gear. a pipe end polishing device main body comprising an internal gear and a plurality of annular brush discs attached to the tip of the brush mounting shaft and embedded with a large number of wire brushes;
A clamp device that clamps a large number of pipes placed on a polishing table with their end surfaces to be polished aligned, and a processing fluid supply pipe that supplies processing fluid and a compressed air pipe that sends compressed air are connected to the wire brush. The present invention relates to a pipe end polishing device characterized by comprising a spray gun for spraying a processing liquid onto the pipe.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A pipe end polishing apparatus according to the present invention will be described in detail below with reference to the drawings.

Fig. 2 is an explanatory diagram showing one embodiment of the state in which the end face of a pipe is polished using the device of the present invention;
The figure is a side sectional view of one embodiment of the polishing device main body in the present invention, FIG. 4 is a front view of the same, FIG. 5 is a front view of the polishing device main body with an annular brush disk attached, and FIG.
The figure is a front view showing one embodiment of the annular brush disk.
The figure is a partially cutaway perspective view showing another embodiment of the annular brush disk.

In the drawing, 1 is a pipe that is a polished material with a burr on the cut end surface, 2 is a polishing table on which the pipe 1 whose end surface is to be polished is placed, and 3 is a clamp that clamps the pipe 1 on the polishing table 2. 4 is a spray gun that sprays a processing liquid onto a wire brush when removing and polishing burrs on the end surface of the pipe 1; 4a is a processing liquid supply pipe that supplies the processing liquid to the spray gun 4; 4b is a spray gun that supplies the processing liquid to the spray gun 4; A compressed air pipe for sending compressed air, 5 a polishing device main body for removing burrs and polishing the end surface of the pipe 1, 6 a disc-shaped rotary disk attached to the polishing device main body 5, and 7 attached to the rotary disk 6. It consists of multiple annular brush discs. Reference numeral 8 denotes a sun shaft which is rotated by a drive device (not shown) and forms the main shaft of the polishing device main body 5. A rotary disk 6 is fixed to one end of the sun shaft 8 by a key. The other end of the sun shaft 8 is connected to a drive device, and the rotation of the sun shaft 8 causes the rotary disk 6 to rotate. Reference numeral 9 denotes a cylindrical stationary plate which is fixed to a support base supporting the sun shaft 8 and accommodates a group of gears, which will be described later, mounted on the rotary plate 6.
A thick boss portion is provided on the inner circumferential surface of the drive device side end of the fixed platen 9, and a fixed internal gear 9a is fixed to the inner circumferential surface of this boss portion. A plurality of planets 10 are rotatably attached to the rotary disk 6 surrounding the sun axis 8 at predetermined intervals from the sun axis 8, and whose axes are on circular orbits centered on the axis of the sun axis 8. The shaft 10a is a planetary gear that is fixed to the planetary shaft 10 and meshes with the fixed internal gear 9a of the fixed plate 9.As the rotary plate 6 rotates, the planetary shaft 10 moves around the axis of the sun shaft 8. The planetary shaft 10 rotates on its own axis because the planetary gear 10a meshes with the fixed internal gear 9a. 10b is a first gear fixed to the planetary shaft 10;
Reference numeral 11 designates a plurality of brush mounting shafts whose axial centers are parallel to the axial center of the planetary shaft 10 and which are rotatably provided on the rotary disk 6. Matching second gear 11a
is fixed, and an annular brush disk 7 is attached to each tip, and the structure is such that it rotates on its own axis due to the rotation of the planetary shaft 10 and revolves around the axis of the sun shaft 8 together with the planetary shaft 10. ing. That is, as shown by the arrow in FIG. 4, when the sun shaft 8 and the rotary disk 6 rotate to the left in the direction opposite to the direction of movement of the clock hands, the planetary shaft 10 rotates to the right in the direction of movement of the clock hands, and the brush mounting shaft 11 rotates to the left, and the planetary shaft 10 and the brush mounting shaft 11 rotate to the left and revolve around the axis of the sun shaft 8 in a counterclockwise direction, and the polishing device main body 5 and the drive device slide It has a structure that allows it to be moved on the base.
Reference numeral 12 denotes a large number of wire brushes embedded in the annular brush disk 7. For example, as shown in FIG. Alternatively, as shown in Fig. 7, a plurality of annular clamping fittings 14 each having a U-shaped cross section are arranged side by side, and a wire bent on both sides with the core material at the center is clamped. It does not specify the structure of the wire brush used in the device of the present invention.

Next, the operation of polishing the end surface of a pipe using the pipe end surface polishing apparatus according to the present invention having such a structure will be described.

When pipes 1 with burrs on their end faces that require removal of burrs and polishing of the end faces are sent onto the polishing table 2, the end faces of the many pipes 1 are aligned in the direction of the polishing device main body 5. It is clamped by the clamping device 3 as shown in FIG. Next, the machining fluid is supplied from the machining fluid supply pipes 4a connected to the spray guns 4 respectively to the compressed air pipes 4.
Compressed air is sent from b to spray the machining fluid toward the wire brush 12 attached to the plurality of annular brush discs 7 provided on the rotary disc 6 of the polishing device main body 5, and the tip of the wire brush 12 is sprayed with the machining fluid. The annular brush disk 7 is moved along with the drive device on the slide base so that the polishing device main body 5 is moved parallel to the end surface of the pipe 1 while maintaining a constant contact pressure with the end surface of the pipe 1.
The wire brush 12 removes burrs and polishes the end surface of the pipe 1, which is placed on the polishing table 2 with its end surfaces aligned. That is, when the sun shaft 8 of the polishing apparatus main body 5 is driven by the driving device and rotated to the left as shown in FIG. Since the mounting shaft 11 revolves around the axis of the sun axis 8 to the left while rotating, the annular brush disc 7 attached to the tip of the brush mounting shaft 11 rotates and moves along the sun axis together with the brush mounting shaft 11. 8, the wire brush 12 can uniformly remove burrs and polish the end surface of the pipe 1. In this case, in order to move the polishing device main body 5 along with the drive device on the slide base parallel to the end surface of the pipe 1 so that the tip of the wire brush 12 contacts the end surface of the pipe 1 while maintaining a constant contact pressure, Polishing can be performed more uniformly, and by making the speed of movement freely adjustable, polishing can be adjusted according to the condition of the end face.

The pipe end surface polishing device according to the present invention is a device that removes burrs and polishes the end surface of the pipe 1 in this manner.Since the wire brush 12 rotates, it must have good dynamic balance. Because it is planted, it is easy to maintain dynamic balance, and because it is annular, it has the highest efficiency per brush area and is easy to manufacture.
Furthermore, the thinner the wire brush 12 is, the better the finished surface can be obtained, but there is a limit to the removal and polishing of burrs, so a wire diameter of 0.25 to 0.5 mm is preferable, and in particular, the wire diameter is 0.25 mm for removing and polishing burrs of steel pipes. ~0.5mm
gives the best results. In addition, the shape may be a simple round wire, and the material varies depending on the material of the pipe 1, but if the material of the pipe 1 is SUS304 stainless steel pipe, the material of the wire brush 12 is
SUS304 stainless steel wire is preferred, and the wire brush 1 is preferably made of ferrite or austenitic stainless steel wire such as SUS631 or SUS430. Also, its hardness is Hb150 on the Brinell scale.
As mentioned above, the tensile strength is preferably 150 Kg/mm ² or more.

Next, the processing liquid sprayed onto the wire brush 12 is used as a coolant or a lubricant, and by spraying this processing liquid and polishing, the efficiency of end face polishing can be significantly improved.

The processing fluids used are Grease Stakes,
Processing oils such as straight minerals, sulfurized chloride activated oils, water-soluble oils, 10% lard oil, and water are effective, and processing liquids consisting of these processing oils alone or in combination with water are preferred; When using a mixed solution with oil, set the oil ratio to 1 to 4% by weight. Even if the sprayed processing fluid adheres to the end surface of pipe 1, it can be easily removed by simply pouring water on it, and polishing It is preferable because it has a remarkable effect. Further, even if only water is used as the processing liquid, it has a polishing effect, so the use of water is effective when the pipe 1 is not susceptible to rust due to adhering water, such as a stainless steel pipe.

The apparatus of the present invention sprays the above-mentioned machining fluid to remove burrs and polish the end surface of the pipe 1. Although the machining fluid may be sprayed constantly during the polishing operation, If the polishing time is relatively short, such as placing the books side by side and sliding the polishing device main body 5 and drive device on the slide base, the wire brush 12 of the annular brush disk 7 should be Satisfactory results can be obtained by simply spraying a sufficient amount of processing fluid. Also, if a rust inhibitor is mixed into the machining fluid, rust and corrosion of polished steel pipes etc. will be prevented and a beautiful polished surface will be obtained.

As described in detail above, the pipe end polishing apparatus according to the present invention includes a plurality of brush mounting shafts 11 that revolve around the axis of the sun axis 8 while rotating on their own axis.
Processing fluid is sprayed onto wire brushes 12 embedded in annular brush discs 7 attached to the tips of the wire brushes 12 , which are sprayed with processing fluid.
Since this is a device that removes burrs and polishes the end surface of the pipe 1 by bringing the tips of the wire brushes into contact with the end surface of the pipe 1 while maintaining a constant contact pressure, (1) Each tip of the wire brush 12 touches the end surface of the pipe 1 Because the contact is uniform, just like when a conventional high-speed rotating cylindrical wire brush is brought into contact with the inner and outer surfaces of the end of a pipe, if only a portion of the wire brush comes into contact, only that portion will wear out. There is no need to worry.

(2) Since the end face of the pipe 1 and the wire brush 12 are cooled by the processing liquid, the burrs on the removed end face may fuse together and the wire brush 12 may
2 is completely prevented from fusing.

(3) Polishing efficiency is improved because frictional heat is reduced by cooling the end surface of the pipe 1 and the wire brush 12 with the processing liquid.

(4) By mixing a rust inhibitor into the machining fluid to prevent rust and corrosion, a more beautiful polished surface can be maintained.

(5) The processing fluid acts as a buffer to prevent heat generation and suppress deep cuts.

(6) Processing fluid prevents smoke and dust from being generated during polishing.

The polishing condition of the tube end surface is determined by the wire diameter of the wire brush 12, how well it conforms due to its elasticity, and the contact time. In the conventional dry method, the end surface of the pipe and the brush were fused together due to the heat generated during polishing, resulting in insufficient removal of burrs, which can be improved. It has excellent advantages such as reduced wear, no need for replacement for a long time, no damage to the end of the pipe by the brush, and a beautiful polished finish on the end of the pipe.
Its industrial value is extremely large.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the end face of a pipe being polished with a conventional cylindrical wire brush;
FIG. 2 is an explanatory diagram showing an embodiment of the polishing device used to polish the end surface of a pipe, and FIG. FIG. 4 is a front view of the same, FIG. 5 is a front view of the main body of the polishing device with the annular brush disk attached, FIG. 6 is a front view showing one embodiment of the annular brush disk, and FIG. 7 is a front view of another embodiment of the annular brush disk. FIG. 2 is a partially cutaway perspective view showing an example. In the drawing, 1...pipe, 2...polishing table,
3... Clamp device, 4... Spray gun, 4a
...Processing liquid supply pipe, 4b...Compressed air pipe, 5...
... Polishing device main body, 6 ... Rotating disk, 7 ... Annular brush disk, 8 ... Sun shaft, 9 ... Fixed plate, 9a ... Fixed internal gear, 10 ... Planetary shaft, 10a ... Planetary gear, 10b ...First gear, 11... Brush mounting shaft, 11a... Second gear, 12... Wire brush, 13, 14... Clamping fittings.

Claims (1)

[Scope of Claims] 1. A disk-shaped rotary disk 6 fixed to one end of a sun shaft 8 supported by a support stand and rotated by a drive device, and A plurality of pieces are rotatably attached to the rotary disk 6 surrounding the sun axis 8 at intervals, and the axis is the sun axis 8.
A planetary gear 10a and a first gear 10 fixed to a planetary shaft 10 on a circular orbit centered on the axis of
b, and a second gear 11a whose axis is parallel to the axis of the planetary shaft 10 and which is fixed to a plurality of brush attachment shafts 11 rotatably provided on the rotary disk 6 and meshes with the first gear 10b. and is fixed to the inner circumferential surface of the drive device side end of a cylindrical fixed plate 9, which houses the gear group mounted on the rotary plate 6 and is fixed to the support base. An end surface of a pipe consisting of a fixed internal gear 9a meshing with the planetary gear 10a, and a plurality of annular brush discs 7 attached to the tip of the brush mounting shaft 11 and having a number of wire brushes 12 implanted therein. A polishing device main body 5, a clamping device 3 that clamps a large number of pipes 1 placed on the polishing table 2 with their end surfaces to be polished aligned, a machining fluid supply pipe 4a that supplies a machining fluid and a compressed air supply pipe. A pipe end surface polishing device comprising a spray gun 4 connected to a compressed air pipe 4b and spraying a processing liquid onto a wire brush 12. 2. The pipe end face polishing device according to claim 1, wherein the polishing device main body 5 can move on a slide base together with the drive device. 3. The pipe end surface polishing device according to claim 1 or 2, wherein the wire brush 12 has a wire diameter of 0.25 to 0.5 mm. 4. Any one of claims 1 to 3, wherein the wire brush 12 is made of a ferrite stainless steel wire, has a Brinell hardness of Hb150 or ^more , and has a tensile strength of 150 Kg/mm2 or more. The pipe end polishing device described in . 5 The wire brush 12 is made of austenitic stainless steel wire and has a hardness of Brinell hardness.
Any one of claims 1 to 3, wherein Hb is 150 or more and the tensile strength is 150Kg/mm ² or more.
The pipe end surface polishing device described in .