JP3004900B2 - Circular hole beveling machine for metal annular body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to various kinds of metal annular bodies, for example, circular holes of a metal annular body called a stiffener ring which is fitted to the outer peripheral surface of a steel pipe cylinder and used as a column-beam joint structure. The present invention relates to an apparatus for machining a circular hole in a metal annular body in which a groove suitable for welding to a cylinder is provided on an (inner peripheral surface).

[0002]

2. Description of the Related Art As shown in FIG.
CFT structure cylinder filled with high-strength concrete (concrete filled steel tube)
In the column-beam joint structure 1, a stiffener ring 3 having a circular hole formed in a polygonal steel plate is fitted on the outer periphery of the column 2 and a fillet weld 4 is formed around the circular hole to form a stiffener ring 3. Is provided.

[0003]

By the way, the above CF
In the stiffener ring 3 provided on the column of the T structure, the thickness of the stiffener ring 3 exceeds 16 mm, which can be used for fillet welding, which is handled in general building standards, for example, 2 mm.
5 mm or more plates are often used,
For this reason, as shown in FIG. 7, such a plate having a large thickness requires a large fillet size because the design instruction of the fillet weld 4 also has a large thickness A, which requires a large amount of welding and a long required welding time. As a result, there is a problem in that it takes time and effort to process the beam-column joint and the cost increases.

In the above-described fillet welding 4, if a groove is provided at each side edge of a circular hole serving as a welding portion of the stiffener ring 3, the fillet size can be reduced without changing the thickness according to design instructions. When manufacturing a stiffener ring, molding of a polygonal outer peripheral surface and opening of a circular hole are performed in the same work process for reasons such as workability and economy.
It is desirable. However, as a groove processing of a circular hole, with one side of the stiffener ring fixed to a lathe, first cut one peripheral edge of the circular hole with a cutting tool, then reverse the stiffener ring and turn the other surface to a lathe Since the remaining peripheral edge is cut with a cutting tool in a fixed state, there is a problem that machining is performed twice and the working efficiency is low.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and provides a stiffener ring after a polygonal outer peripheral surface is formed and a circular hole is formed in a plate. An object of the present invention is to provide a groove beveling apparatus which can easily and efficiently bevel a circular hole of a metal annular body.

[0006] As specific means for achieving the above object, a first aspect of the invention, the face plate for securing an rotatably journalled by a metallic annular body to the headstock, countercurrent to the face plate
Only a tailstock for mounting to retractably disposed correct position by crimping the metal ring body faceplate direction, the
The centering work of the metal annular body is performed by the tailstock.
After the tailstock retreats, the carriage
A lathe device having a cutting tool that moves to the annular body side and cuts both peripheral edges of the circular hole of the metal annular body, and fits into the circular hole of the metallic annular body at the tip of the tailstock shaft of the tailstock. A pair of cutting tools for simultaneously beveling both peripheral edges of the circular hole of the metal annular body on the carriage with the centering jig to be fitted.
It is characterized by being arranged adjacently so as to face the V-shape .

According to a second aspect of the present invention, the centering jig is provided with a plurality of support arms radially protruding from the boss of the centering shaft, and provided at the tip of the support arm, the metal centering jig is provided on the outside. The annular member has a claw member having a tapered surface for abutting against a peripheral edge on the circular hole side.

[0008]

According to the present invention, a metal annular body such as a stiffener ring is temporarily fixed to the face plate of the headstock, and the tapered surfaces of the plurality of claw members of the centering jig are brought into contact with the periphery of the circular hole of the metal annular body. Centering while touching and rotating, and
A pair of adjacent inverted V-shaped cutting tools disposed on the carriage are set at positions such that both sides of the circular hole are sandwiched from both the inner and outer surfaces, and the face plate of the headstock is rotated to form a circular hole in the metal annular body. Can be quickly and efficiently grooved simultaneously on both side edges.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a stiffener ring beveling device will be described. This beveling device 10 is rotatably mounted on a headstock 12 as shown in FIG. Metal ring 1 as a stiffener ring
A face plate 14 for temporarily fixing and fixing 6, and a circular hole 22 of a metal annular body 16 provided on a core pushing shaft 20 of a tailing table 18 movably movable toward the face plate 14. A centering jig 24 for centering, and the metal annular body 16
And a pair of adjacent cutting tools 28a and 28b disposed on the carriage 26 for simultaneously performing beveling on both inner and outer peripheral edges of the circular hole 22.

The metal annular body 16 is temporarily fixed to the face plate 14 of the headstock 12 by four-way tightening with a chuck 42. As shown in FIG. The relationship is that the inner surface of the outer peripheral portion is in contact with the protruding face plate 14a than the circular hole 22 and the inner surface near the circular hole 22 is provided with a gap D between the concave face plate 14b. Can be

The centering jig 24 for properly attaching the metal annular body 16 to the face plate 14 includes:
As shown in FIG. 2, a plurality of support arms 32 projecting radially from the boss 30 of the tailing shaft 20, a connecting rod 33 connecting the ends of the support arms 32 to each other, and a tip of the support arm 32. The claw members 34 are provided with tapered surfaces 36 which are in contact with the peripheral edges of the circular holes 22 on the front surfaces of the claw members 34, as shown in FIG.

It is desirable that the centering jig 24 can be variably adjusted in length in the radial direction according to the size of the circular hole 22. In this embodiment, for example, the circular hole 2
The claw member 34 having a different size can be detachably attached to the tip of the support arm 32 depending on the size of the support arm 32. As another means for variably adjusting the length of the centering jig 24 in the radial direction, although not particularly shown, for example, a structure in which the length of the support arm 32 can be expanded and contracted by rotating a screw is used. It may be.

On the other hand, as shown in FIG. 4, a pair of cutting tools 28a and 28b arranged adjacent to the carriage 26 are fixed such that their respective cutting edges 38a and 38b face an inverted V shape. For the circular hole 22, the front edge 3
8a is a face plate 14b recessed after passing through the inside of the circular hole 22
And the respective cutting edges 38a, 38b
Are set so as to straddle the inner and outer peripheral edges of the circular hole 22 correctly.

At the time of machining, after the metal annular body 16 is temporarily fixed to the face plate 14 of the headstock 12 by the chuck 42 as described above, the tailstock 18 is advanced, as shown in FIG. Claw member 34 in centering jig 24
The tapered surface 36 on the front surface of the metal ring 16 is
The metal annular body 16 is centered while rotating the face plate 14 while rotating the face plate 14. Finally, the metal annular body 16 is firmly fixed to the face plate 14 by the chuck 42.

After the centering operation of the metal annular body 16 is completed, the tailstock 18 is moved backward, and the carriage 26 is moved to the metal annular body 16 side.
b is positioned so as to straddle the inner and outer peripheral edges of the circular hole 22 correctly.
8a and 28b are gradually moved in the radial direction of the face plate 14,
As shown in FIG. 4, symmetrical K-shaped grooves 40a and 40b are simultaneously cut on the inner and outer peripheral edges of the circular hole 22.

The annular metal body 16 having the groove formed on both the inner and outer peripheral edges of the circular hole 22 is fitted into the steel pipe column 2 as shown in FIG. 6, and as shown in FIG. The groove 4
By applying a fillet weld 46 having a throat thickness B equal to the design instruction throat thickness A required during normal fillet welding to 0a and 40b, a beam-to-column joint 48 of the CFT structural column is formed. You.

[0017]

As described above, according to the groove processing apparatus of the present invention, the claw member 34 of the centering jig 24 attached to the centering shaft 20 is made of a metal ring such as a stiffener ring. The centering work is facilitated by abutting the peripheral edges of both sides of the 16 circular holes 22 and performing the centering of the circular holes 22 while rotating the face plate 14, and furthermore, adjacently arranged in an inverted V-shape. With the pair of cutting tools 28a and 28b, both sides of the circular hole 22 can be cut at the same time to obtain symmetrical grooves 40a and 40b. A metal annular body such as a stiffener ring can be manufactured quickly and easily with a work efficiency of twice or more.

Further, by forming the circular hole 22 of the metal annular body 16 into a K-shape, the metal annular body 16 such as a stiffener ring and the steel pipe cylinder 2 are made to have a throat equal to the design instruction throat A. Since the fillet weld 46 having the thickness B can be provided, the welding amount and welding time can be greatly reduced as compared with the conventional fillet weld 4 as shown in FIG.

In the above embodiment, a case has been described where a circular hole of a stiffener ring used in a column-to-column joint of a steel pipe cylinder is formed as a metal annular body, but the present invention is not limited to this. Is not limited to only the stiffener ring, but can be effectively used when forming a groove in a circular hole of various metallic annular bodies other than the stiffener ring.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a groove processing apparatus according to the present invention.

FIG. 2 is a plan view showing a configuration of a centering jig.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is an explanatory view showing a step of forming a groove in a circular hole of a metal annular body by a cutting tool provided on a carriage, wherein a indicates before cutting, b during cutting, and c when cutting is completed.

FIG. 5 is a partial cross-sectional view of a beam-column joint in which a metal annular body obtained by the groove processing apparatus of the present invention is attached to a steel pipe column.

FIG. 6 is a perspective view showing the configuration of a beam-column joint in a steel pipe column conventionally known as a CFT structural column.

FIG. 7 is a partial cross-sectional view showing a configuration of a column-beam joint between a steel pipe column and a stiffener ring in a conventional CFT structural column.

[Explanation of symbols]

 2: Cylinder 10: Beveling machine 12: Headstock 14: Face plate 16: Metal ring 18: Corestock 20: Corestock 22: Circular hole 24: Centering jig 26: Reciprocating table 28a, 28b: Tool 32: Support arm 33: Connecting rod 34: Claw member 36: Tapered surface 38a, 38b: Blade edge 40a, 40b: Open edge 46: Fillet welding 48: Beam-column joint

Claims (2)

(57) [Claims] 1. A face plate for fixing a metal annular body rotatably mounted on a headstock, and an advancing / retreating head toward the face plate.
And tailstock for disposed stationary mounting in the correct position by crimping the metal ring body faceplate direction, this tailstock
Centering work of the metal annular body is performed,
After retreating, the carriage moves to the metal ring side.
And dynamic consists lathe apparatus and a byte for cutting a circular hole both edges of the metal annular member, core of the tailstock
At the tip of the push shaft, there is provided a centering jig to be fitted into the circular hole of the metal ring, and the carriage has a pair of cutting tools for simultaneously beveling the both sides of the circular hole of the metal ring, and the cutting edge is inverted V. Toward the shape
An annular groove processing apparatus for a metal annular body, which is arranged so as to be adjacent to each other . 2. A centering jig comprises: a plurality of support arms radially protruding from a boss of a centering shaft; and a circular hole side of the metal annular body provided on the distal end of the support arm. 2. The apparatus according to claim 1, further comprising a claw member having a tapered surface for contacting a peripheral edge.