JPS634574Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a burr that removes burrs that are formed by forming an opening in a pipe body from the radial direction and is raised along the edge of the opening. Regarding the taker,
In particular, the present invention relates to a burr remover that can easily and reliably remove burrs in either left or right rotational drive and does not damage the inner circumferential surface of a tube.

[Technical background of the invention and its problems]

When the tube body 1 is bored to form an opening 2 in its radial direction as shown in FIG. 1, a burr 3 is formed along the edge of the opening 2, protruding inward in the radial direction.

Conventionally, the burr 3 has been removed by inserting a cutting edge, file, etc. into the opening 2 from the outside in the radial direction and cutting it. Alternatively, the burr 3 has been removed by inserting a drill blade, a reamer blade, etc. into the tube body 1 from the longitudinal direction and scraping it off.

However, the burring hole 4 as shown in FIG.
In this case, since the peripheral edge of the opening 2 is formed to extend outward in the radial direction, the burr 3 could not be removed even if a cutting blade or the like was inserted from the outside in the radial direction.

In addition, the inner diameter of the tube 1 may vary or be deformed, but if a drill blade or the like is inserted into the tube 1 from the longitudinal direction, the drill blade or the like will change its outer diameter. is constant and has no flexibility, resulting in the problem of damaging the inner circumferential surface of the tube body 1.

Furthermore, since the direction of rotation of the drill bit, reamer blade, etc. is determined by the twisted groove formed on the outer periphery thereof, there is a problem that burrs cannot be scraped off depending on the direction of rotation. Therefore, when a drill blade or the like is rotated by a machine, it is necessary to match the rotational driving directions of the machine and the drill blade, which is troublesome.

[Purpose of invention]

The present invention was devised in order to effectively solve the conventional problems as described above, and its purpose is to reliably damage the inner circumferential surface of the tube body during both left and right rotational drive. To provide a deburring device capable of removing burrs without any burrs.

[Summary of the idea]

In order to achieve the above object, the present invention includes a rotary drive shaft that is inserted into the tube to be treated along its longitudinal direction and driven to rotate, and a plurality of rotary drive shafts arranged along the circumferential direction on the outer periphery of the rotary drive shaft. A flexible blade part that is divided and has a distal end fixed to a rotary drive shaft and a base end movable along the axial direction of the rotary drive shaft, and a base end of the blade part that is rotatably driven. The deburring device is equipped with a coil spring that urges the blade in the direction of compression along the axial direction of the shaft, expands radially outward, and contacts the surface to be treated of the tube body. be.

[Example of idea]

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 3, 1 is a tubular body, and an opening 2 is formed in the tubular body 1 from the radial direction. Tube 1
When the opening 2 is drilled in the radial direction of the opening 2, a burr 3 is formed along the edge of the opening 2 formed by drilling inward in the radial direction. A deburring device 5 according to the present invention is formed to remove this burr 3 from the tube body 1.

In FIGS. 3 and 4, 6 is the pipe body 1 to be treated.
This is a rotary drive shaft that is inserted along the longitudinal direction into the rotary shaft and driven to rotate. A plurality of flexible blade portions 7 are provided on the outer periphery of the rotary drive shaft 6 and are divided along the circumferential direction, and facing both sides of the blade portion 7, that is, adjacent blade portions 7. A cutting edge is formed on the surface along its longitudinal direction and radially outward. The tip 7a of the blade 7 is connected to the rotational drive shaft 6.
It is attached to a bushing 8 fitted on the outer periphery of the rotary drive shaft 6 and fixed to the rotary drive shaft 6. On the other hand, the base end portion 7b of the blade portion 7 is fixed to a bush 9 fitted to the outer peripheral portion of the rotary drive shaft 6, and is provided so as to be movable along the axial direction of the rotary drive shaft 6. As shown in FIG. 5, the bush 9 is movable only in the axial direction of the rotary drive shaft 6, and has grooves 10 formed at appropriate intervals along the circumferential direction in its inner circumference, as shown in FIG. On the other hand, the rotary drive shaft 6 has protrusions 11 on its outer circumference that fit into the grooves 10 within the movable range of the bush 9.
It forms... Therefore, the base end 7b of the blade portion 7 moves along the axial direction of the rotary drive shaft 6 without being twisted due to the engagement between the groove 10 and the protrusion 11.

Further, the base end portion 7b of the blade portion 7 is attached to the base end portion of the rotary drive shaft 6 along the axial direction of the rotary drive shaft 6.
A coil spring 12 is provided which urges the tube in a direction to compress it, expand it radially outward, and bring it into contact with the surface to be treated of the tube body 1. That is, the coil spring 12 is formed along the outer periphery of the rotary drive shaft 6, and biases the base end 7b of the blade 7 toward the tip 7a to bend the blade 7 and move it radially outward. It is expanding in this direction.

Incidentally, the rotary drive shaft 6 is connected to a shank portion 13 extending along the axial direction thereof.

Next, the operation of the present invention will be described.

The deburring device 5 is inserted into the tube 1 to be treated along its longitudinal direction and rotated. The deburring device 5 is rotated by hand by input, or by power by connecting the shank portion 13 to a rotary drive portion of a machine. The blade portion 7 inserted into the tubular body 1 has its proximal end portion 7b urged by the coil spring 12, moves along the axial direction of the rotary drive shaft 6, and expands outward in the radial direction, as shown in FIG. As shown in the figure, the treated surface 1a of the tube body 1 comes into contact with the tube body 1. Although there are various types of tubular body 1, such as those with large and small inner diameters, the blade portion 7 is biased from the base end 7b side to the distal end 7a side by the coil spring 12, so the inner diameter is constant. It comes into contact with the surface to be processed 1a with a pressing force. When the blade part 7 in contact with the surface to be treated 1a is driven to rotate, the cutting edge 7c formed on the blade part 7 comes into contact with the burr 3 raised on the surface to be treated 1a, and uses its rotational force or pressing force to remove it. Scrape it off. Blade tip 7c
are formed on both sides of the blade portion 7, so that the burr 3 can be reliably scraped off even when the blade portion 7 is rotated in either the left or right direction. In addition, the blade part 7
The protrusion 11 formed on the outer periphery of the rotary drive shaft 6 and the groove 10 formed on the inner periphery of the bush 9 fit together to rotate and drive without twisting, thereby removing the burr 3.

Furthermore, even if the inner diameter of the tube 1 varies or the inner circumference is deformed, the blade portion 7 can be divided into a plurality of pieces along the circumferential direction of the rotary drive shaft 6 and can be moved in the radial direction. Since it has flexibility and is biased by the coil spring 12, there is no risk of damaging the inner peripheral surface of the tube body 1.

[Effect of idea]

As is clear from the above explanation, the present invention exhibits the following excellent effects.

(1) The proximal end of the blade is urged toward the distal end by a spring, expands radially outward, and contacts the surface of the tube to be processed with a constant pressing force, ensuring the removal of burrs. can do.

(2) The blade portion is divided into several pieces along the circumferential direction of the rotating drive shaft, is flexible in the radial direction, and is biased by a spring. Therefore, even if the inner diameter dimensions of the tube vary or the inner circumference is deformed, burrs can be removed without damaging the inner surface of the tube.

(3) Burrs can be reliably removed even if the device is rotated in either the left or right rotation direction.

(4) Burrs can be removed more easily than before, and workability is excellent.

(5) It can be used in various pipe bodies and is highly practical.

[Brief explanation of drawings]

Figures 1 and 2 are side sectional views showing a state in which burrs have formed inside the tube, Figure 3 is a perspective view showing a preferred embodiment of the present invention, and Figure 4 shows the main parts of Figure 3. FIG. 5 is a sectional view taken along the - line arrow in FIG. 4, and FIG. 6 is a front view showing a state in which the deburring device is inserted into the tube to be treated. In the figure, 1 is a tube body, 1a is a surface to be processed, 2 is an opening, 3 is a burr, 6 is a rotary drive shaft, 7 is a blade part, 7a
is its tip, 7b is its base end, and 12 is a spring.

Claims (1)

[Scope of utility model registration request] In a deburring device that removes burrs that are formed by forming an opening in a tube body from the radial direction and are raised along the edge of the opening, A rotary drive shaft is inserted and rotationally driven, and the outer circumferential portion of the rotary drive shaft is divided into a plurality of parts along the circumferential direction, the distal end portion is fixed to the rotary drive shaft, and the proximal end is rotationally driven. A flexible blade part is provided to be movable along the axial direction of the shaft, and a proximal end part of the blade part is biased in a direction that compresses the blade part along the rotational drive shaft. A deburring device characterized by comprising a spring that expands outward and comes into contact with the surface to be treated of the tube.