JPH04118446A - Beveling formation for column part - Google Patents

Abstract

PURPOSE:To produce products of high accuracy with high efficiency by a method in which a band metal is welded to the end of the inner surface of a column part, and the ends of the column part and the band metal are concurrently cut. CONSTITUTION:A band metal B having an adequate thickness(t) and an adequate width(w) is welded to the end of the inner surface of a column part W by projecting its one end only by an adequate amount S from the end of the column W. The roller 60 of a cutter is contacted with the peripheral side of the column part W, and a cutter N for beveling formation is positioned on the ends of the column part W and the metal B. The whole body of the cutter pressingly turned toward the center of the part W to cut the ends of the part W and the metal B by the cutter N for both beveling and end processings concurrently. Beveling formation for the column parts can thus be attained with high productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for forming a groove in a column material, which contributes to rationalization and high precision of the groove processing operation.

(Prior art) In general steel construction methods, in order to join a steel beam to a steel column, a member (with diaphragms D, D) welded to both ends of the column material W as a joint part ( Using the joint part J), take out the beam H from the side.
・Perform by butt welding. And diaphragm D
, D from above and below, the ends of the columns Wa and Wb are butted against each other.

The joint part J used for such a joint part is
As shown in Fig. 5, a backing metal F, which is made by bending a flat bar, is welded to the inner peripheral surface of a column material W whose outer peripheral edge has been shaped and beveled, while adjusting the dimensions. It is manufactured by welding the diaphragms D and D in contact with the ends of the gold F.

(Problems to be Solved by the Invention) Here, the efficiency of assembling the joint parts described above is governed by the accuracy of the column material W. In other words, the column material W is cut at a right angle to a predetermined length by a band saw and then beveled before use, but there are dimensional errors and errors in perpendicularity due to the bending that occurs during cutting. The shape is different from the ideal shape.

Therefore, in the past, these two errors were artificially eliminated by adjusting the protrusion dimension of the backing metal F from the end of the column material W, but this took a lot of time and effort to manufacture, making it difficult to improve productivity. I can't hope for that at all.

In addition, those that have been processed into a shape bevel while being bent are the 6th
As shown in the figure, a discrepancy in root face dimensions (RRz) may result in welding defects.

The present invention has been made in view of the problems of the prior art described above, and aims to provide a method for forming a groove in a column material that does not require adjustment of the backing metal, has excellent manufacturing accuracy, and is highly productive. It is something to do.

(Means for Solving the Problems) In order to achieve the above object, a method for forming a groove in a column material according to the present invention is as follows.

That is, the gist of the present invention is that the first step is to weld a band having an appropriate thickness and width to the end of the inner circumferential surface of the column material, and the cutting of the circumferential surface that intersects with the longitudinal direction of the column material. a second step of simultaneously cutting the ends of the column material and the metal strap with a cutter; and a third step of cutting the end of the metal band with a cutter having a cutting peripheral surface perpendicular to the longitudinal direction of the column material. The reason is that the groove is formed by the step 1, and that the cutters in the second step and the third step are respectively provided on the rotation shafts in the longitudinal direction of the column material, and the cutting is performed at the same time.

(Function) As mentioned above, attach the strap to the column material in advance,
Since both are cut simultaneously to perform bevel processing and end processing, no manual adjustment is required. Moreover, by performing groove and end processing simultaneously, a highly accurate product can be efficiently obtained.

(Example) Hereinafter, the method for forming a groove in a column material according to the present invention will be described with reference to an example.

FIG. 1 is an explanatory diagram of the first step, and in the figure, W
is a column material, and B is a band attached to the inner peripheral surface end of the column material W by welding. The above-mentioned band B is cut to form a groove part K as shown in Fig. 2, and for this purpose, the plate thickness t and width W are appropriately selected, and one end is cut from the end of the column material W. It is arranged to protrude by an appropriate amount S.

FIG. 3 shows the configuration of a cutting device applied to the second step and the third step.

In the figure, 50 is a bearing tube, 51 is a bearing 52.5
2. This rotary cylinder 51 is provided with one end protruding from the bearing cylinder 50, and a cup 7-shaped end face processing cutter M is attached to this projecting end. This end face processing cutter M has a cutting peripheral surface that is perpendicular to the longitudinal direction of the column material W, that is, the narrow direction of the rotating shaft 5I.

53 is a spindle which can slide in the rotating cylinder 51 by engaging the spline protrusion a and the spline groove. This spindle 53 has both ends connected to the rotating cylinder 51.
1, and an umbrella-shaped beveling cutter N is attached to one of the protruding ends. This beveling cutter N has its cutting peripheral surface in the longitudinal direction of the column material W, that is,
It intersects obliquely with respect to the axial direction of the spindle 53, and has a J-shape with a straight portion and an arcuate portion.

The beveling cutter N described above is arranged so as to be surrounded by the end face processing cutter M, and the beveling cutter N is adjusted to move in the axial direction by a movement adjusting means connected to the other end of the spindle 53. Ru.

That is, 56 is a passive nut body provided at the end of the spindle via a bearing 55, 57 is a mounting base provided at the end of the bearing sleeve 50, 58 is a feed motor with a reducer provided on the mounting base 57, and 59 is a feed motor 58. This is a screw shaft installed on the output shaft that runs in the spindle direction.

The output of the above-mentioned feed motor 58 is applied to the spindle 53 as a sliding movement by the threaded engagement of the screw shaft 59 and the passive nut 56.

60 is the spindle 53 in front of the beveling cutter N.
Freely rotating copying roller attached to the end The copying roller 60 described above has a size corresponding to approximately the smallest diameter portion of the beveling cutter N. Reference numeral 61 denotes a dual-power lever provided on the rear side of the bearing cylinder 50 so as to be linked to the passive gear 62 on the rotary cylinder 51 side.
This is a drive motor.

In the above cutting device, the copying roller 60 is connected to the column material W.
When the beveling cutter N comes into contact with the outer circumferential surface of Slide adjust M and set the relative position of the cutter so that a predetermined groove shape can be obtained as a whole.

Next, with the column material W fixed at a fixed position by a clamping means (not shown), when the entire cutting device is rotated while pressing toward the center of the column material, the column material W is The end portion of the metal band B is shaved, and the end portion of the metal band B is shaved by the end face processing cutter M, and beveling and end face processing are simultaneously performed on the required portions. By the above processing, the end face of the band B protruding from the column material W is formed perpendicular to the longitudinal direction.

Note that unless you change the positional relationship of the two cutters M and N, the groove shape and end face shape will not change no matter where you cut into the column material W. Therefore, if you actively adjust their longitudinal position, the column material The overall dimensions of the material can be adjusted.

(Effects of the Invention) As described above, the groove forming method according to the present invention is achieved by attaching a band in advance to an appropriate position at the end of a column material and cutting both the column material and the band at the same time. Furthermore, the end face was processed. Therefore, there is no need to manually adjust the perpendicular accuracy and dimensional accuracy as in the past, and highly accurate products can be manufactured efficiently.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the first step in the groove forming method for column material according to the present invention. Fig. 2 is an explanatory diagram showing the shape after processing. Fig. 3 is also applicable to the second and third steps. Fig. 4 is a perspective view showing the structure of a steel joint section. Figs. 5 and 6 are explanatory diagrams showing the drawbacks of the conventional welding method. W: Column material B: Band metal M: End face processing cutter - NJI
II tip machining cutter 50: Bearing tube 51 Rotating tube 5
3 Varnishing spindle 58: Feed motor 60: Copying roller 61: Drive motor

Claims (2)

[Claims] (1) The first step is to weld a metal band having an appropriate thickness and width to the end of the inner circumferential surface of the column material, and the above-mentioned column material and band are welded by a cutter having a cutting peripheral surface that intersects with the longitudinal direction of the column material. A second step of cutting the ends of the gold at the same time, and a third step of cutting the ends of the metal band using a cutter having a cutting peripheral surface perpendicular to the longitudinal direction of the column material. Method for forming grooves in column materials. (2) Forming a groove in the column material according to claim (1), wherein the cutters in the second step and the third step are respectively provided on rotational shafts in the longitudinal direction of the column material so that the cutting operations are performed simultaneously. Method.