JP2003205443A - Chamfering machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chamfering machine, capable of eliminating a pressing mechanism between a member holding mechanism and one grinding wheel member in the conventional chamfering machine to simplify the structure of the chamfering machine, reduce the manufacturing cost, and reduce the size. <P>SOLUTION: This chamfering machine is constructed by at least four rollers serving as a member rotating mechanism and a member holding mechanism, a grinder holding device 6 serving as a plane position adjusting mechanism and an elevation angle adjusting mechanism located on the tilting lower side of a rotating shaft 13 of the roller, an angle grinder 7 installed in the grinder holder 6 and a frame 5 supporting the rollers and the grinder holder. At least one of the rollers is a driving roller 1, and the others thereof are driven rollers 3. Further, these rollers have a small width not to obstruct the movement of a member 4 to be chamfered depending on the gravity, that is, dead load. The rotating shaft 13 of each roller has an angle θ of inclination to the horizontal surface 14. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chamfering technique for a peripheral edge of a round bar / round tube material.

[0002]

2. Description of the Related Art When a round bar / round tube material is used in a rolling mill, a drawing device, or other machine tools, chamfering of the peripheral edges of the material may occur in order to avoid troubles due to breakage of the material during processing. The conventional device for chamfering the peripheral edge of the chamfered member such as a round bar or pipe is a member holding mechanism,
Elements such as a member rotating mechanism and a pressing mechanism between the grinding wheel and the member were required.

Among them, a roller is generally used for the member rotating mechanism, but various mechanisms have been developed for the member holding mechanism and the pressing mechanism between the grinding wheel and the chamfered member. For example, the grindstone pressing mechanism shown in FIG. 7 of the deburring device for the inner and outer surfaces of both tube ends of Japanese Patent Laid-Open No. 54-2591 is one in which weights are attached to a cylindrical grinder. A roller clamp is used to hold the member.

The pressing mechanism shown in FIG. 1 of the pipe end groove processing apparatus disclosed in Japanese Patent Laid-Open No. 55-157460 is a mechanism for mechanically contacting a grinder using a handle, and a member holding mechanism is used. I use my nails. Since these chamfering machines have a chamfering member holding mechanism and a pressing mechanism between the grinding wheel and the member, the structure itself is rather large and complicated, and there are problems in manufacturing cost, installation location, and the like.

[0005]

The problem to be solved by the present invention is to eliminate the member holding mechanism and the pressing mechanism between the grinding wheel and the member, and to reduce the manufacturing cost and the size by simplifying the structure of the chamfering machine. It is to provide a chamfering machine that realizes the realization.

[0006]

According to the invention of claim 1, at least four rollers which also serve as a member rotating mechanism and a member holding mechanism, and a tilting shaft 13 of the rollers are provided. Direction, the grinding machine holder 6 also serves as a plane position adjusting mechanism and an angle-of-attack adjusting mechanism, an angle grinder 7 installed on the grinding machine holder 6, and a pedestal 5 supporting the rollers and the grinding machine holder. It is a chamfering machine. At least one of the above rollers is the driving roller 1, and the other rollers are the driven rollers 3.
Further, these rollers are rollers having a small width that does not hinder the movement of the chamfered member 4 due to gravity, that is, its own weight, and the rotation axis 13 thereof has an inclination angle θ with respect to the horizontal plane 14.
With.

That is, the chamfering machine of the present invention uses at least four rollers as a rotating mechanism for the chamfered member. Among them, at least one roller is a driving roller 1 driven by an electric motor 2, and the other rollers are driven rollers 3 which rotate following the rotation of the chamfering member 4 rotated by the driving roller 1. The rotary shafts 13 of these rollers are attached to the horizontal plane 13 at a constant inclination angle θ. For this reason, the members mounted on these rollers rotate, and the angle grinder 7 attached to the grinder holder 6 that also functions as a plane position adjusting mechanism and an angle-of-attack adjusting mechanism attached to the gantry 5 by its own weight.
And is chamfered by being pressed by the grindstone 8 of the angle grinder 7 by its own weight. The important thing here is that the width of each roller must be small enough. That is, if the width of the roller is too large, the chamfering member 4
The chamfering member 4 that moves due to its own weight during rotation due to the friction of the contact portion increases due to the increased contact area between the roller 1 and the rollers 1 and 3.
Hinder the movement of.

The chamfering machine is not limited to steel bars and steel pipes, and can be used for chamfering the peripheral edge of any round bar or tube.

According to the second aspect of the invention, the rotary shaft 13 of the roller, which also functions as a member rotating mechanism and a member holding mechanism, is attached to the horizontal plane 14 at a constant inclination angle θ, and the rollers 1 and 3 are rotated to rotate. The chamfered member 4 is placed on the rollers 1 and 3, and while being rotated by the rollers 1 and 3, the chamfered member 4 is attached to the cradle 5 by the weight of the chamfered member 4 and attached to the grinder holder 6 which also serves as a plane position adjusting mechanism and an attack angle adjusting mechanism. The chamfering is performed on the chamfered edge of the chamfered member 4 by moving the chamfered member 4 toward the grindstone 7 by the weight of the chamfered member 4 by itself. This is a method of chamfering the peripheral edges of round bars and pipes.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the inclination angle θ of the rotary shaft 13 of the roller of the chamfering machine of this embodiment with respect to the horizontal plane 14 is realized by inclining the gantry 5. The inclination angle θ is 0 ° <θ ≦ 10 °, and the peripheral edge of the end of the chamfered member 4 is grindstone 8.
Sufficient pressing force is applied to the surface. 1 side view, FIG.
Although it is omitted in the plan view of FIG. 3, as shown in the front view of FIG. 3, the cover 9 is attached so that the rollers 1 and 3 are exposed for safety in order to prevent the worker's clothes from being caught by the rollers 1 and 3. As shown in FIG. 3, only a small part is shown. A commercially available angle grinder 7 was used as a grinding machine for chamfering. The angle of attack α of the angle grinder 7 is changed by changing the height position of the tip of the angle-of-attack adjusting bolt 10, and the plane position of the angle grinder 7 is supported by a fulcrum bolt 11 that attaches the grinder holder 6 to the pedestal 5. And rotate it to adjust. Each roller 1 and 3
The support 12 is fixed to the pedestal 5 by bolts or welding. The constituent members of the gantry 5 are firmly assembled by bolts or welding of the respective parts, and are securely fixed to the floor using anchor bolts or the like.

[0011]

EXAMPLE The chamfering method by the chamfering machine of the above-described embodiment of the present invention will be shown in the following examples. In this embodiment, the inclination angle θ of the roller rotation shaft 13 is 2 °, and the driving roller 1 and the driven roller 3 have a diameter of 200 mm and a width of 50 mm.
The installation area of this chamfering machine is 1100 × 700 mm including the dimensions of the angle grinder 7.

SUJ2 of φ100 as the chamfered member 4
When chamfering steel pipes, grindstone 8 of angle grinder 7
Has a diameter of 180 mm. Grindstone 8 for 7600r
After being rotated at pm, the chamfered member 4 is driven by the drive roller 1
Then, the drive roller 1 is rotated by placing it on the driven roller 3. The steel pipe of the chamfered member 4 smoothly moved in the direction of the angle grinder 7 under its own weight, and the chamfering of the edge of the steel pipe corresponding to C8 specified in JIS was completed in 10 seconds.

When the tilt angle θ of the rotary shaft 13 of the driving roller 1 and the driven roller 3 with respect to the horizontal plane 14 is increased, the pressing force of the chamfered member 4 against the grindstone 8 increases and the grinding speed increases, but the structure Since the chamfering member 4 is received by the angle grinder 7, the angle grinder 7 and the grinder holder 6 are easily damaged. Therefore, θ should be 10 ° or less, preferably 4 ° or less. Further, when the tilt angle θ is large, the rotation speed of the grindstone 8 decreases as the pressing force increases, so that the grinding speed cannot be expected to increase as a result. Conversely, the tilt angle θ is 1
If the angle is less than °, the chamfered member 4 has an angle grinder 7
It takes time to move to the side, and when the tilt angle θ is 0 °, the member does not move due to its own weight. Therefore, the tilt angle θ
The optimum value of is 1 to 4 °.

[0014]

As described above, according to the present invention, the member holding mechanism of the conventional chamfering machine and the pressing mechanism between the grinding wheel and the member are abolished, and the roller having the roller rotation axis is inclined is provided. Since the chamfered member is pressed against the grinding wheel surface by its own weight, the chamfered member can be easily moved to the angle grinder.
Since the grinding of the chamfering work of the peripheral edge of the round pipe member is efficiently done, it has a simple structure with a small number of parts,
Therefore, it is an extremely small chamfering machine that can be installed anywhere. The chamfering machine is not limited to steel bars and steel pipes, and can be used for chamfering the peripheral edge of any round bar or tube.

[Brief description of drawings]

FIG. 1 is a side view schematically showing a chamfering machine of the present invention.

FIG. 2 is a plan view of the chamfering machine shown in FIG.

3 is a front view of the chamfering machine shown in FIG. 1. FIG.

[Explanation of symbols]

1 drive roller 2 electric motor 3 Driven roller 4 chamfer 5 mounts 6 Grinding machine holder 7 Angle grinder 8 whetstone 9 cover 10 Angle of attack adjustment bolt 11 fulcrum bolt 12 Roller support 13 rotation axis 14 Horizontal θ tilt angle

Claims (2)

[Claims] 1. A drive roller having at least one driving roller having a small rotation width, the rotation axis of the roller also serving as a member rotating mechanism and a member holding mechanism having an inclination angle θ with respect to a horizontal plane and not hindering movement of a chamfered member by gravity. At least four rollers, a grinder retainer that also functions as a plane position adjusting mechanism and an angle-of-attack adjusting mechanism in the downward tilt direction of the roller rotation shaft, an angle grinder installed in the grinder retainer, and these rollers and the grinder retainer. A chamfering machine for the peripheral edge of round bars and pipes, which consists of a pedestal that supports vessels. 2. A roller, which also functions as a member rotating mechanism and a member holding mechanism, is attached at a constant inclination angle θ with respect to a horizontal plane to rotate the roller, and a chamfered member is placed on the rotating roller and the roller is rotated by the roller. While rotating, move the chamfered member to the direction of the angle grinder attached to the grinder holder that also functions as a plane position adjustment mechanism and angle of attack adjustment mechanism attached to the gantry by its own weight, and the chamfered member's own weight causes the angle grinder's grindstone to move. A chamfering method for chamfering a peripheral edge of an end portion of a chamfered member by generating a pressing force on the surface.