KR100640227B1 - Burring Tools for Burring Machines for Piping - Google Patents

Abstract

The present invention relates to a burring tool which is clamped to a tool bar of a bearing machine to form a through hole at an outer diameter portion of a pipe and at the same time expand the through hole to form a joining rib. Looking at the configuration, the shaft is clamped to the tool bar (T) of the bearing machine (M), the support rod 12 and the fastening portion 14 is formed stepped on the connection portion 11 extending to the lower end 10; Receiving grooves 22a and 22b are formed along with the through-hole 22 in the center to be inserted into the support rod 12 of the shaft 10 so that the bearing member B is interposed, and the inclined surface 24 is formed in the outer diameter portion. Expansion pipe roller 20 is formed; And a hole hole 32 formed at a center thereof so as to be screwed to the fastening portion 14 of the shaft 10 adjacent to the bottom surface of the expansion roller 20, and a cutter blade 34 formed at the bottom surface thereof. 30); characterized in that comprises a.

Accordingly, in the burring tool installed in the tool bar of the bearing machine to process the through hole in the outer diameter of the pipe and expand the pipe to form the joining rib, the boring cutter for forming the through hole is easily replaced. In addition to screwing, the expansion roller is rotated so that the frictional resistance is reduced during the process of expanding the through hole to form the joint rib, thereby preventing the overall deformation and damage including the joint of the pipe.

Description

Burring machine of burring tool for piping process

1 is a configuration diagram showing a bearing tool of a conventional bearing machine.

Figure 2 is a perspective view showing an overall bearing tool according to the present invention.

Figure 3 is an exploded perspective view showing the decomposition of the bearing tool according to the invention.

Figure 4 is a longitudinal cross-sectional view showing the internal configuration of the bearing tool according to the present invention.

Figure 5 is a block diagram showing a state of use of the bearing tool according to the present invention.

Figure 6 is a longitudinal cross-sectional view showing the internal configuration of the bearing tool according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: Shaft 11: Connection

12: support rod 14: fastening portion

20: expansion roller 22: through hole

22a, 22b: receiving groove 24: inclined surface

30: hole cutter 32: nut hole

34: cutter blade

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing tool for a boring machine for piping processing, and more particularly, is provided in a tool bar of a bearing machine to process a through hole at an outer diameter portion of a pipe and to simultaneously expand the pipe to form a joining rib. In the bearing tool, screwed to facilitate the replacement of the boring cutter to form the through hole, and the expansion roller is installed to rotate, thereby preventing the overall deformation and damage including the joint of the pipe as the frictional resistance is reduced when expanding the through hole. It relates to a bearing tool of a boring machine for piping processing.

Generally, pipes are installed to form flow paths of fluids and gases, such as cutting oil, cooling water, and fuel, which are used in automobiles, industrial machines, and automated production lines. The pipe is bent in a streamlined form along the path of the flow path or a plurality of pipes are spoken so as to be in contact with each other. At this time, the pipes are processed to communicate with other pipes at the outer diameters of the bearing machines, and at the same time, the pipes are expanded. Pipe to form a joining rib to facilitate welding of the pipe.

1 is a configuration diagram showing a bearing tool of a conventional bearing machine.

In Fig. 1, a conventional boring tool 1 of a bearing machine M is formed with a perforated cutter 2 at its bottom, and one side of the outer diameter portion adjacent to the perforated cutter 2 is recessed. Expansion tip 3 is fixed. Thus, the bearing tool 1 is rotated coaxially with the spindle S in a state clamped to the tool bar T of the bearing machine M as shown in the enlarged view of FIG. 1, and is piped by the drilling cutter 2. The through hole H is machined in the outer diameter portion of (A), and then is conveyed together with the tool bar T by the transfer of the jaw J, and the conveying tip 3 is conveyed upward as the turning radius is expanded. The inner diameter part of the tube is pressurized to expand the pipe, and at the same time, the joint rib R is protruded to form a joint at a position where the pipe A is in contact.

At this time, since the boring cutter (2) and the expansion tip (3) of the bearing tool (1) is formed integrally in a single body, the through hole (H) or the through hole (H) to expand the joining rib (R) Partial replacement is not possible if the perforated cutter 2 or expansion tip 3 is partially worn and damaged during the forming process. The boring tool (2) and the expansion tip (3) of the boring tool (1) is used to regenerate by grinding the grinder, but the grinding and processing of the burring tool (1) in accordance with the variable tolerance The cumbersome disadvantage of having to correct the limit position of the arring machine (M) from time to time, and in order to prevent the deterioration of workability due to these disadvantages, the situation is to use the overall replacing the bearing tool (1) as a whole.

In addition, the expansion tip (3) of the bearing tool (1) is upwardly transferred to the extended rotation radius is pressed to the inner diameter of the through hole (H), the expansion operation is carried out by the friction force generated at this time and the enlarged through hole (H) protrudes outward, and the joining rib R is formed. However, as the frictional resistance of the high load is generated between the expansion tip (3) and the through hole (H), the expansion tip (3) is easily worn, and the joint rib (R) of the pipe (A) is torn or damaged such as cutting. In many cases, the pipe A is warped by the high temperature frictional heat as a whole.

In addition, in order to cool the high temperature frictional heat according to the frictional resistance of the expansion pipe (3) described above, the coolant such as lubricating oil, non-aqueous cutting oil, and the like is excellent in cutting oil. However, since such cutting oil is expensive and oxidizes or causes poor welding during welding, the pipe (A) where the joining and finishing process is completed through the bearing machine (M) must remove the remaining cutting oil through the washing process. Productivity is lowered as a result of the additional process, and additional costs are incurred due to the use of expensive detergents put into the washing process, which leads to an increase in manufacturing costs.

Accordingly, the present invention has been conceived in view of the above point, in more detail is installed in the tool bar of the bearing machine to process the through hole in the outer diameter portion of the pipe at the same time to expand the pipe to form a joint rib In the erring tool, screwed to facilitate replacement of the boring cutter forming the through hole, and the expansion roller is installed to rotate so that overall deformation and damage including the joint of the pipe is prevented as the frictional resistance is reduced when expanding the through hole. It is an object of the present invention to provide a burring tool for a boring machine for piping processing.

In order to achieve the above object, the present invention is a burring tool which is clamped to the tool bar of the bearing machine to form a through hole at the outer diameter of the pipe and at the same time expand the through hole to form a joining rib: the bearing machine (M) A shaft 10 having a tip end clamped to a toolbar T of the support rod 12 and a support rod 12 and a fastening portion 14 formed on the connection portion 11 extending downward; Receiving grooves 22a and 22b are formed along with the through-hole 22 in the center to be inserted into the support rod 12 of the shaft 10 so that the bearing member B is interposed, and the inclined surface 24 is formed in the outer diameter portion. Expansion pipe roller 20 is formed; And a hole hole 32 formed at a central portion thereof so as to be screwed to the fastening portion 14 of the shaft 10 adjacent to the bottom surface of the expansion roller 20, and a cutter blade 34 formed at the bottom surface thereof. 30); characterized in that comprises a.

In one embodiment according to the present invention, the insertion hole 42 is recessed together with the nut part 42a at the lower end of the shaft 10 ', and the upper surface of the drilling cutter 30' corresponding to the insertion hole 42. The support rod 44 is integrally protruded into the expansion roller 20 'is inserted into the bolt portion (44a) is formed at the tip is characterized in that it is screwed to the nut portion (42a).

 Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a perspective view showing a bearing tool according to the invention as a whole, Figure 3 is an exploded perspective view showing the decomposition of the bearing tool according to the invention, Figure 4 is a longitudinal cross-sectional view showing the internal configuration of the bearing tool according to the invention 5 is a configuration diagram showing a state of use of the bearing tool according to the present invention.

The present invention relates to a burring tool that is clamped to a tool bar of a bearing machine to form a through hole at an outer diameter of the pipe and at the same time expand the through hole to form a joining rib, wherein the bearing tool is shown in FIG. It is rotated coaxially with the spindle S in the state clamped to the tool bar T of the bearing machine M, and moves downward. A through hole H is formed in the outer diameter portion of the pipe B in advance, and then the jaw J It is conveyed with the tool bar (T) by the transfer of the upwardly conveyed in a state in which the rotation radius is expanded to expand the inner diameter of the through hole (H) and at the same time protrudes the joining rib (R) outside the pipe (A). To this end, the bearing tool of the present invention is characterized in that it comprises a shaft 10, expansion roller 20, drilling cutter 30 and the like.

The shaft 10 according to the present invention has a tip end clamped to the tool bar T of the bearing machine M, and the support rod 12 and the fastening part 14 are formed stepwise on the connection part 11 extending downward. do. Shaft 10 is the end is processed in the form of a round bar clamped to the toolbar (T), the support rod 12 and the fastening portion 14 is provided with an expansion roller 20 and the perforated cutter 30 is installed at the lower end do.

In addition, the support rod 12 is processed in a circular rod shape having a circular cross-sectional shape so as to extend on the connecting portion 11 becomes smaller toward the bottom as shown in Figure 2, the outer diameter diameter of the expansion roller 20 will be described later In consideration of the size of the through-hole 22 of the process is processed to a precise tolerance (for example, the clearance which is not spaced in the state in which the expansion pipe 20 is inserted on the support rod 12), the fastening portion 14 is formed at the end . The fastening part 14 is a coupling part which protrudes so as to extend on the support bar 12 and the punching cutter 30 to be described below is fastened through the nut hole 32, and is stepped to a diameter smaller than the size of the support bar 12. It is processed and a male screw is formed in an outer diameter part.

In addition, the expansion roller 20 according to the present invention is formed with a receiving hole (22a, 22b) with a through hole 22 in the center to be inserted into the support rod 12 of the shaft 10, the bearing member (B) It is interposed and the inclined surface 24 is formed in the outer diameter part. The expansion pipe 20 has a through hole 22 formed in the center thereof so as to be rotatably inserted into the support rod 12 of the shaft 10, and is rotatably inserted into the support rod 12 of the shaft 10. The through-hole 22 has one or more accommodation grooves 22a and 22b formed in a stepped structure in the inner diameter portion thereof, and the accommodation grooves 22a and 22b have expansion pipes 20 inserted into the support rods 12. As a space portion in which the bearing member B is interposed so as to smoothly rotate in a state, as shown in FIG. 4, a receiving groove 22a is formed in the inner diameter portion of the through hole 22 corresponding to the outer diameter portion of the support rod 12. ) Is formed in a long width so that the roller bearing is inserted, the receiving groove 22b formed at a position corresponding to the upper surface of the punched cutter 30 to be described later is formed in an annular frame shape so that the ball bearing is inserted.

Accordingly, the bearing member B inserted into the receiving groove 22a reduces the frictional resistance due to the pressing force acting laterally through the expansion roller 20, and the bearing member B inserted into the receiving groove 22b. When the bearing tool moves upward and reduces the frictional resistance due to the pressing force acting downward when expanding the through hole H through the inclined surface 24 of the expansion roller 20, the rotation of the expansion roller 20 is always smooth. To be maintained.

At this time, the inclined surface 24 formed on the outer diameter portion of the expansion pipe 20 is formed in a tapered structure that narrows the diameter toward the top. This is because the burring tool moves downward and processes the through hole H in the outer diameter portion of the pipe A by the drilling cutter 30 which will be described later, and is then moved together with the jaw J on the chuck C to expand the turning radius. When rotating upwards to expand the through-holes (H), as shown in FIG. 5, the tip of the narrow inclined surface 24 is gradually pressed in close contact with the inner surface of the through-holes (H) to form a joining rib (R). The frictional resistance is reduced to prevent damage to the bearing machine and wear of the bearing tool due to overload.

As such, the expansion pipe 20 is rotatably inserted together with the bearing member B in the support rod 12 of the shaft 10 to press the through hole H of the pipe A to the outer diameter of the expansion pipe 20. Rotating on the support rod 12 while being pressed against the inner surface of the additional through hole H and pressurizing the through hole H, the frictional resistance between the pipe A and the expansion roller 20 is extremely reduced, thus reducing the amount of cutting oil. In addition, the processing is smoothly performed without the injection or injection, and the defects such as the through hole H being torn or deformed during the processing of the joining rib R are prevented in advance.

Meanwhile, although the bearing member B is installed in two places in FIGS. 3 to 4, the present invention is not limited thereto, and the bearing member B is not limited to two or more places in consideration of the processing environment such as the size and material of the pipe A. It is also possible to install or to exclude the bearing member (B).

In addition, the drilling cutter 30 according to the present invention is a nut hole 32 is formed in the center portion to be screwed to the fastening portion 14 of the shaft 10 adjacent to the bottom surface of the expansion roller 20, the cutter on the bottom surface Blade 34 is formed. The drilling cutter 30 is screwed to the fastening portion 14 of the shaft 10 so that the nut hole 32 is formed at the center thereof so that the upper surface thereof is in close contact with the bottom surface of the expansion roller 20. The nut hole 32 is machined to the same pitch as the external thread pitch formed in the above-described fastening portion 14, and the punched cutter 30 is connected to the fastening portion 14 of the shaft 10 through the nut hole 32. The expansion pipe 20 inserted on the support rod 12 in a screwed state is rotatably supported.

In addition, the punch cutter 30 is formed on the bottom surface of the cutter blade 34 for cutting the through hole (H) in the outer diameter portion of the pipe (A). As shown in FIGS. 2 to 5, the cutter blade 34 is formed to have a flat blade end like a flat end mill, or is not limited thereto, and protrudes in a drill shape as shown by reference numeral 34 ′ of FIGS. 4 and 6, and a shaft Through-hole H is formed in the outer diameter part of piping A by the rotational force of the drilling cutter 30 rotated with (10).

On the other hand, after the hole H is processed in advance in the outer diameter portion of the pipe A by the boring cutter 30 of the bearing tool, the expansion roller 20 passes through the hole H to the inside of the pipe A. As it moves upward after entering and expands the through hole H, the diameter of the outer diameter of the perforated cutter 30 is larger than the outer diameter of the expand roller 20 to facilitate insertion of the expand roller 20 through the through hole H. It is preferred to be produced in a size.

In addition, reference numeral 30a in FIG. 3 is a fastening surface, and is chamfered at positions facing each other so as to bind a tool such as a spanner (not shown) to the outer diameter portion of the punching cutter 30. This has the advantage that can be screwed tightly by inserting a tool such as a spanner on the fastening surface (30a) after screwing the drilling cutter 30 on the fastening portion 14 of the shaft (10).

In addition, as shown in Figure 5, the burring tool is conveyed together with the jaw (J) to expand the through-hole (H) and at the same time to form a joining rib (R) and the fastening surface (30a) is raised through the hole (H) As it is positioned to correspond to the inner surface of the) is spaced apart between the drilling cutter 30 and the through hole (H) to prevent damage to the cutter blade 34 and the joining rib (R) due to friction when the bearing tool is returned to the origin.

In use, first, the pipe A, which is a workpiece, is loaded into a vise (not shown) provided on the table of the bearing machine M, and the bearing tool is clamped to the toolbar T, and then the start button (not shown) is used. When the is operated, the chuck C is rotated together with the bearing tool by the driving force of the servomotor. Subsequently, the head portion M 'of the bearing machine M is transferred downward to process the through hole H in the outer diameter portion of the pipe A by the boring cutter 30 of the bearing tool, and then the expansion roller 20. ) Is transferred to the position accommodated inside the pipe (A), the jaw (J) is transferred to the outside with the toolbar (T) on the chuck (C) to expand the rotation radius of the bearing tool as shown in the enlarged view of FIG. Subsequently, the head portion M 'of the bearing machine M moves upward, and the inclined surface 24 of the expansion roller 20 gradually presses and expands the inner diameter of the through hole H, and at the same time, the bonding ribs R outward. When protruded, the joining process of the pipe A is completed.

At this time, the expansion roller 20 is rotated on the support rod 12 of the shaft 10 in a state in close contact with the inner surface of the through hole (H) and the frictional resistance is extremely reduced as expansion pipe processing is performed to the pipe (A) The damage of not only the through hole (H) but also the expansion roller (20) is prevented, and even if the expansion roller (20) or the cutter blade (34) is worn and damaged due to repeated use of the bearing tool, the parts are easily replaced. There is an effect of reducing the maintenance cost due to damage to the tool.

Figure 6 is a longitudinal cross-sectional view showing the internal configuration of the bearing tool according to an embodiment of the present invention.

In FIG. 6, the insertion hole 42 is recessed together with the nut part 42a at the lower end of the shaft 10 ', and the supporting rod 44 is disposed on the upper surface of the punching cutter 30' corresponding to the insertion hole 42. The integrally protruding and the expansion roller 20 'is inserted and the bolt portion 44a is formed at the tip and screwed to the nut portion 42a. In the shaft 10 ', the insertion hole 42 is machined to a predetermined depth to form a nut part 42a at the inner end position, and the support rod 44 is formed at the tip of the corresponding drilling cutter 30'. A bolt portion 44a is formed at the end to be integrally protruded and screwed into the nut portion 42a in a state accommodated in the insertion hole 42. And the expansion roller 20 'is rotatably inserted into the support rod 44 of the drilling cutter 30' through the through hole 22 'formed in the center, and the upper surface or the support rod 44 of the drilling cutter 30'. The bearing member B 'is interposed on the through hole 22' of the expansion pipe 20 'adjacent to the outer diameter of the roller.

Thus, the support bar 44 is formed integrally with the drilling cutter (30 ') to accommodate the expansion roller (20'), screwed in a state that is screwed in the state accommodated in the insertion hole 42 of the shaft (10 ') In order to form a joint in a small diameter pipe (A), even if the bearing is manufactured in a compact size, it is advantageous to prevent damage to the bolt portion 44a, which is easily vulnerable to durability due to the reduced diameter. have.

6 shows a state in which a bearing member B 'is interposed between the support rod 44 of the punch cutter 30' and the through hole 22 'of the expansion roller 20', but is not limited thereto. It is also possible to provide a configuration in which the expansion roller 20 'is rotatably provided on the supporting rod 44 without the bearing member B' being disposed.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

As described above, the present invention is a boring tool installed in the tool bar of the bearing machine to process the through hole in the outer diameter portion of the pipe and to expand the pipe to form a joining rib. The screwed to facilitate the replacement of the expansion roller is installed so that the expansion roller is rotated to reduce the frictional resistance during the expansion of the through hole as a whole to prevent deformation and damage, including the joint of the pipe is a useful effect.

Claims (2)

In a burring tool which is clamped to the tool bar of the bearing machine to form a through hole at the outer diameter of the pipe and expands the through hole to form a joining rib: A shaft 10 in which a tip is clamped to a tool bar T of the bearing machine M, and a support rod 12 and a fastening portion 14 are stepped on a connection portion 11 extending to a lower end thereof; Receiving grooves 22a and 22b are formed along with the through-hole 22 in the center to be inserted into the support rod 12 of the shaft 10 so that the bearing member B is interposed, and the inclined surface 24 is formed in the outer diameter portion. Expansion pipe roller 20 is formed; And Perforated cutter 30 having a nut hole 32 formed in a central portion thereof so as to be screwed to the fastening portion 14 of the shaft 10 adjacent to the bottom surface of the expansion roller 20, and a cutter blade 34 formed on the bottom surface thereof. Cutting tool of a boring machine for piping processing, characterized in that consisting of. The method of claim 1, The insertion hole 42 is recessed together with the nut part 42a at the lower end of the shaft 10 ', and the supporting rod 44 integrally protrudes on the upper surface of the punching cutter 30' corresponding to the insertion hole 42. And the expansion pipe 20 'is inserted and a bolt part 44a is formed at the tip and screwed to the nut part 42a.

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