JP2003117713A - Beveling device for h-shape steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve work efficiency and to miniaturize machine constitution by shortening the moving stroke of a cutting head. SOLUTION: The cutting head 5 traveling along a guide 4 is provided with first to third rotating shafts 14-16. The first rotating shaft 14 on the preceding side in the moving direction is mounted with a chase cutter 20 with a cylindrical cutting peripheral surface, the second rotating shaft 15 in the middle is mounted with a beveling cutter 21 with a cutting peripheral surface of a truncated cone shape, and the third rotating shaft 16 on the succeeding side is mounted with a scallop cutter 22 with a cutting peripheral surface of mushroom shape.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an H-shaped steel groove processing apparatus for performing a required cutting process including a groove process on an H-shaped steel flange and a web. It is about. 2. Description of the Related Art FIG. 6 shows a conventional beam-column connection structure at a steel connection. In the figure, A is a square column m constituting a column material m, n is a diaphragm provided at the upper and lower ends of the square column A W is an H-shaped steel a constituting a beam material a, b
The flange c in the H-section steel W is a web Ca connecting both flanges a and b in the middle, and Ca and Cb are sloped grooves formed at the ends of the flanges a and b. Da and Db are ends of the web c. Notched scallops Ea and Eb formed near the groove surfaces Ca and Cb are narrow-width surface faces Fa and Fb formed at the tips of the groove surfaces Ca and Cb, and root faces Ea and Eb and diaphragms m and n are formed. This is a backing metal that is arranged on the back side as a butt portion. [0003] In the above construction, the groove surfaces Ca and Cb of the flanges a and b and the ends of the diaphragms m and n are welded all around, and the end surface of the web c and the square column A are welded.
In this method, the welding line is concentrated by scallops Da and Db, and the joint is generally welded by scallop welding. It is called the construction method. [0004] By the way, the cutting of each part of the H-section steel W, that is, the groove face C for the flanges a and b.
cutting of a, Cb and root faces Ea, Eb,
A processing apparatus for performing cutting of scallops Da and Db on the web c is already known from Japanese Utility Model Publication No. 4-32168. This processing apparatus includes three rotating shafts 10 on a cutting head 101 that moves up and down as shown in FIG.
2, 103 and 104, and cutters 105, 106, 10
7 is attached. And the cutting head 101
Is moved upward to cut the H-section steel W. More specifically, the cutting head 10
1 and a driven-in cutter 105 having a cylindrical cutting peripheral surface on the first rotating shaft 102 at the uppermost position.
A scallop cutter 106 having a mushroom cap-shaped cutting peripheral surface on the rotation shaft 103 of the third rotation shaft 104 at the lowest position.
A groove cutter 107 having a frusto-conical cutting peripheral surface is mounted on the table 108. The cutters 105 to 107 are moved upward, and at this time, the flanges a and b and the web c of the H-section steel W on the table 108 are attached. The required cutting process is performed. The additional cutter 105 also has a role of reducing the cutting load on the groove cutter 107. [0006] The above-mentioned cutting is started when the uppermost cutting cutter 105 cuts into the lower ends of the flanges a and b of the H-section steel W, and the lowermost groove cutter 107 is cut.
Is completed when has passed the upper ends of the flanges a and b. Therefore, in the case of the H-section steel W in which the height dimensions of the flanges a and b are Ha, the moving stroke amount of the cutting head 101 is La. [0007] Incidentally, the H-section steel applied to the beam-column connection portion is of the largest class and has a flange height of 600 mm and a flange thickness of 60 mm, in this case, every 40 mm. Cutting is performed at a feed speed of about one minute. Therefore, in the case of the above-mentioned shape, when the passing time of the cutter is added, the processing time reaches 25 minutes or more. The present invention has been made in view of the above-mentioned problems of the prior art. By reviewing the conventional arrangement of cutters, the moving stroke of the cutting head can be shortened, thereby improving the machining efficiency. It is an object of the present invention to provide an H-shaped groove beveling device capable of improving the size and reducing the size of the machine configuration. Means for Solving the Problems In order to achieve the above object, an H-section bevel processing apparatus according to the present invention is configured as follows. That is, the gist of the invention is that a cutting head that travels along a guide is provided with first to third rotating shafts, and a groove cutter having a frusto-conical cutting peripheral surface on these rotating shafts. , A cutting cutter with a cylindrical cutting surface and a scallop cutter with a mushroom cap-shaped cutting surface are separately installed, and these cutters cut the groove and root face on the flange of the H-section steel on the web. In a processing device that performs scallop processing,
In the moving direction of the cutting head, a follow-up cutter is attached to the first rotating shaft on the leading side, a groove cutter is attached to the second rotating shaft in the middle, and a scalloped cutter is attached to the third rotating shaft on the trailing side. It is in. The cutting process is started when the preceding cutting cutter cuts into one end of the flange of the H-section steel. As the cutting process progresses, the middle groove cutter is
The subsequent scalloped cutter cuts into the web,
As shown in FIG. 4, when the H-section steel is a small material, when the scallop cutter finishes the cutting of the web, the groove cutter has already passed the other end of the flange, and all the cutting is completed. I do. In the case of a large material as shown in FIG. 5, when the scallop cutter finishes the cutting of the web, the groove cutter is in the middle of machining the flange. Therefore, at this time, when the groove cutter passes the other end of the flange, all cutting operations are completed. As described above, in any case, all cutting can be completed before the cutter on the trailing side in the feed direction passes through the other end of the flange. For this reason,
The moving stroke of the cutting head is reduced as much as possible. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a groove processing apparatus for H-section steel according to the present invention will be described. FIG. 1 is a front view showing the entire configuration. 1 is a roller-type table on which an H-section steel W is placed with flanges a and b standing. A pair of vice pieces 2a and 2b that move up and down is used. H on table 1
Clamping means for pressing and fixing the section steel W 3,3 are columns established on both sides of the table 1,4 are vertical guide rails arranged on the columns 3,3 5,5 are vertically movable on the guide rails 4,4 It is a cutting head arranged in. The cutting heads 5 and 5 are symmetrical and move in the guide direction by a feeding means (not shown). The cutting heads 5, 5 have the origin position at the solid line position in FIG.
Carry out cutting work. One of the pair of cutting heads can be adjusted to move in the left-right direction.
Corresponding to the width dimension. The structure of the cutting head 5 will be described with reference to FIG. 6 is a main body case 7, 8 and 9 are first to third rotary cylinders rotatably provided by bearings 7a, 7b and 7c in the main body case 6. These rotary cylinders 7 to 9 They are orthogonal and are arranged at intervals from the top. Reference numerals 10, 11, and 12 denote passive gears attached to the ends of the rotary cylinders 7 to 9, and an electric motor 13 is linked to the passive gears 10 to 12 via idle gears (not shown). Reference numerals 14, 15, and 16 denote first to third rotary cylinders 7 to
First to third rotating shafts arranged so as to be respectively inserted into the rotary shaft 9 On the outer peripheral portions of these first to third rotating shafts 14 to 16, an axially long key groove 17 is formed. Rotating cylinder 7
9 are fitted. As a result, the first to third rotating shafts 14 to 16 are supported in the rotating cylinders 7 to 9 while allowing only the sliding movement. First to third rotating shafts 14 to 16
Has one end protruding outward, and is provided with cutter attachment portions 19a to 19c. Reference numeral 20 denotes an additional cutter attached to the first rotating shaft 14. This additional cutter 20 has a cylindrical cutting peripheral surface and performs cutting of flanges a and b in the H-section steel W. 21 is a groove cutter attached to the second rotating shaft 15. The groove cutter 21 has a frusto-conical cutting peripheral surface and performs cutting of the flanges a and b. Reference numeral 22 denotes a scalloped cutter mounted on the third rotating shaft 16. The scalloped cutter 22 has a mushroom cap-shaped cutting peripheral surface and performs cutting of the web c. Reference numeral 23 denotes an axial through hole provided in the center of each of the rotary shafts 14 to 16. A slide adjusting means for each of the rotary shafts 14 to 16 provided in the through hole 23. Left nut portion 24a provided in cylinders 7-9
And a right nut portion 24b provided on each of the rotating shafts 14 to 16,
Adjustment bolt 2 screwed onto these nut portions 24a, 24b
4c. The above slide adjusting means 24
Moves the first to third rotating shafts 14 to 16 left and right to set the protruding positions of the respective cutters (the additional cutter 20, the groove cutter 21, and the scallop cutter 22). The configuration of the groove processing apparatus according to one embodiment is as described above, and performs the required cutting as follows. To do this, first, as shown in FIG.
The position adjustment of the shape steel W and each cutter (addition cutter 20, groove cutter 21, scalloped cutter 22) is performed.
That is, the H-shaped steel W is positioned in the longitudinal direction (up and down direction in the figure) by a stopper (not shown), and each rotating shaft is adjusted by the slide adjusting means 24 to set the projecting position of each cutter. When the position setting of the H-section steel W and each cutter is completed in this way, the cutter is rotated by the electric motor 14 and the cutting head 5 is driven upward by the elevation drive means (not shown). The cutting heads 5, 5 are H-shaped steel W in FIG.
, The first rotating shaft 1 is first attached to the flanges a and b of the H-section steel W by the above-described raising operation.
The cut-in cutters 20 and 20 of 4 cut and cut the cuts. The raising operation of the cutting head 5 is continued, and as the cutting process progresses, the groove cutter 2 of the second rotating shaft 15
1, 21 cut into the flanges a, b. By this operation, the groove faces Ca and Cb and the root face EaEb are created on the flanges a and b. When the cutting head 5 is further raised, the scallop cutter 22 of the third rotating shaft 16 cuts into the web c. Then, scallops Da and Db can be created on the web c by the cut. The upward movement is sufficient until the center of the scalloped cutter 22 passes through the web c. At this time, as shown in the schematic diagram of FIG. 4, the trailing cutter 20 and the groove cutter 21 completely pass through the flanges a and b. Cutting has been completed. As described above, the flange a of the H-section steel W,
If the cutting of the groove and root face for b and the cutting of scallop for web c are completed,
The cutting head 5 is moved downward by rotating the elevating and lowering means in the reverse direction. This movement is performed at high speed, and the cutting head 5 is quickly returned to the home position. In the above example, at the point in time when the cutting of the web c by the scallop cutter 22 is completed, the cutting-in cutter 20 and the groove cutter 21 have already been processed. However, in the case of the large H-section steel W, the latter two cutters 20, 21 are in the process of being processed at the above time. Therefore, in such a case, until the cutting of the flanges a and b is completed,
That is, it is necessary to move the cutting head 5 upward until the intermediate groove cutter 21 passes through the flanges a and b. As described above, the H-section steel groove beveling device according to the present invention has a follow-up cutter in the leading side in the moving direction of the cutting head, a groove cutter in the middle, and a trailing side in the trailing side. It has a scalloped cutter. Therefore, when the cutting of the web by the scallop cutter is completed, or when the cutting of the flange by the two leading cutters is completed, all the cutting can be completed. Therefore, the moving stroke of the cutting head can be greatly reduced as compared with the conventional one provided with the groove cutter on the trailing side. This provides an excellent effect that the working efficiency can be improved and the size of the machine can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing an embodiment of an H-section steel groove preparation apparatus according to the present invention. FIG. 2 is a longitudinal sectional front view showing a configuration of a cutting head. FIG. 3 is an explanatory view showing a processing shape and a processing state of an H-section steel. FIG. 4 is an explanatory view showing a processing state of an H-section steel. FIG. 5 is an explanatory view of a processing state. FIG. 6 is an explanatory view showing a beam-column joint structure in a steel connection part. FIG. 7 is an explanatory view of a conventional groove processing apparatus. [Description of Signs] W H-section steel a Flange b Flange c Web Ca Groove face Cb Groove face Da Scallop Db Scallop Ea Root face Eb Root face 1 Table 4 Vertical guide 5 Cutting head 14 First rotating shaft 15 Second rotating shaft 16 First rotating shaft 20 Drive-in cutter 21 Groove cutter 22 Scallop cutter

Claims (1)

1. A groove cutter having a cutting head traveling along a guide and having first to third rotating shafts, and having a frusto-conical cutting peripheral surface on these rotating shafts. A cutting cutter with a cylindrical cutting surface and a scallop cutter with a mushroom cap-shaped cutting surface are separately installed. These cutters cut the groove and root face on the flange of the H-section steel, and scallop on the web. In a processing apparatus for performing processing, in the moving direction of the cutting head, a follow-up cutter is mounted on a first rotating shaft on the leading side, a groove cutter is mounted on a second rotating shaft in the middle, and a third rotating shaft on the succeeding side. A beveling machine for H-section steel, characterized by having a scalloped cutter attached to it.