JPH09290320A - H shear metal mold entry side guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a flange outer surface and web surface of an H-steel brought into contact with only a guide roller, by arranging a plurality of guide elements, comprising the guide roller and its support part, in an H shear metal mold entry side. SOLUTION: A guide element comprising a single guide roller 30F and its support part 32F as guiding an upper/lower flange outer surface, a guide element comprising two guide rollers 30W and a support part 32W thereof for guiding a right/left web surface, are arranged to be respectively mounted in a front surface of a fixed blade 7. In this way, the upper/lower flange outer surface and web surface are brought into contact with only the guide roller 30F, to be guided, generation of a rubbing flaw in H-steel is effectively prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an H-shear mold entry side guide device, and more particularly to an H-shear mold entry side guide device having an H-shaped hole blade that shears while passing an H-shaped steel.

[0002]

2. Description of the Related Art Lightweight welded H-section steel (hereinafter simply referred to as "H-section steel"), which is widely used for construction and structural purposes, usually consists of two upper and lower flanges made of flat steel and a web made of flat steel. While passing through so as to form V seams on the top and bottom,
It is manufactured by continuously welding and joining the tip of the V seam by a high frequency resistance welding method, and after welding, the shape is corrected if necessary, and then sheared to a predetermined length for commercial use.

FIG. 4 shows a side view of an essential part of an H-shear used for high-speed shearing of H-section steel. In FIG. 4, 1 is an H-shaped steel,
2 is an H-shear mold, 3 is a traveling control unit, 4 is a shear drive unit,
5 is a hammer, 6 is a knocker, 7 is a fixed blade, 8 is a movable blade, 9
Is the direction of passing materials. As shown in FIG. 4, the H shear is
H-shear mold 2 incorporating a tool having H-shaped hole blades (fixed blade 7, movable blade 8), and passing speed of H-shaped steel 1 from the standby position to the shearing completion position of the H-shear mold 2 during shearing work The traveling blade 3 is caused to travel in synchronization with the traveling control portion 3 to return to the standby position after the completion of shearing, and the movable blade 8 is momentarily moved by hitting the knocker 6 with the hammer 5 while traveling while linking to the traveling control portion 3. And a shearing drive unit 4 for performing shearing.

FIG. 5 is a sectional view of a conventional H-shear mold 2.
FIG. 6 is a view on arrow AA in FIG. 5 and 6,
10 is a base plate, 11 is a side cover, 12 is a top cover, 13 is a knocker stopper, 14 is a slide block, 15
Is a pusher, 16 is a slide blade, 17 is a spring,
18 is an exit side guide roller which is rotatably supported by a moving blade,
Reference numeral 19 is a retainer, 20 is a flange guide, 21 is a web guide, 22 is an H-shaped hole blade, and 23 is a cushion flange. The same members as those in FIG.

As shown in FIG. 5, the H-shear mold 2 includes a fixed blade 7, a movable blade 8 and a retainer 19 for slidably pressing the movable blade 8 on the base plate 10 from the upstream side. They are arranged and held by the side cover 11 and the top cover 12. A flange guide 20 and a web guide for guiding the entry of the H-section steel 1 are provided on the entrance side of the fixed blade 7.
21 and 21 are provided in a trumpet shape.

As shown in FIG. 6, the movable blade 8 has a rectangular outer shape that is movable in a space surrounded by the base plate 10, the side cover 11, and the top cover 12, and has an upper corner (upper right corner in the figure) and an upper corner. For example, the bottom two corners are 30
Notched at an angle of °, slidably abutted on the hypotenuse of the triangular pusher 15 at the even number (lower right corner) of the non-notched upper left corner, and on the hypotenuse of the triangular slide block 14 at the other two notched corners. The upper end surface is in contact with the knocker 6 held by the knocker stopper 13. An H-shaped hole blade 22 having a size that allows the H-shaped steel 1 to pass through is provided inside thereof. The H-shaped hole blade 22 is also provided inside the fixed blade 7. In addition, the fixed blade 7 and the movable blade 8 are the internal H-shaped hole blades corresponding to the web-passing form as shown in the figure.
22 are arranged so as to form an I shape when viewed from the front.

The lower side of the pusher 15 is slidable on a slide blade 16 provided on the base plate 10, and the remaining one side is pushed leftward by a spring 17 which receives a cushion flange 23 as a reaction force. , Moving blade 8
Is lifted diagonally to the upper left by this pushing force exerted via the pusher 15 and abuts the top cover 12 and the left side cover 11, and the H-shaped steel 1 is cut into the H-shaped hole blade 22.
Wait while passing through.

During the shearing work, the hammer 5 strikes the knocker 6 while moving the H-shear mold 2 in synchronization with the threading speed of the H-section steel 1 to instantly move the moving blade 8 diagonally to the lower right. . At this time, at the interface between the fixed blade 7 and the movable blade 8, the movable blade is provided on the outer surface and the left end surface of the upper flange of the H-shaped steel 1, the left surface of the web, the inner surface of the lower flange and the left end surface in a sectional view facing the threading direction 9. The H-shaped hole blade 22 of No. 8 cuts the H-shaped hole blade 22 of the fixed blade 7 into the inner surface and right end surface of the upper flange, the right surface of the web, the outer surface of the lower flange and the right end surface, respectively.
The shearing of the shaped steel 1 proceeds.

After the impact, the moving blade 8 is returned to the standby position by the pushing force of the spring 17.

[0010]

However, the above-mentioned conventional H
In many cases, scratches are generated on the outer surfaces of the upper and lower flanges and the web surface of the H-shaped steel tip portion sheared by the shear. The inventors of the present invention have conducted extensive studies to improve this point, and have found that the cause of this scratch is due to friction between the H-section steel and the flange guide and the web guide on the H-shear mold entry side. Obtained. That is, when shearing progresses, the H-shaped hole blade of the movable blade pushes the H-shaped steel diagonally downward and to the right in FIG. 6, resulting in a situation in which the H-shaped steel is strongly pressed against the lower flange guide and the right web guide. Although the H-shear mold is synchronized with the H-shaped steel passing speed, there is an unavoidable error in such control, so that the pressed part rubs and develops a scratch.

When the movable blade returns, the H-shaped hole blade may bite into the burrs at the shearing end and press the H-shaped steel against the upper flange guide and the left web guide. In view of the above-mentioned problems of the prior art, the present invention can effectively prevent the scratches that tend to occur on the entry side when shearing H-section steel with H shear.
An object is to provide a shear mold entry side guide device.

[0012]

According to a first aspect of the present invention, a guide element consisting of a guide roller and a supporting portion for supporting the guide roller is provided so that the flange outer surface and the web surface of the H-shaped steel contact only the guide roller. A guide device for the H-shear mold entry side, wherein a plurality of guides are provided on the H-shear mold entry side so as to be guided.

The second invention is the same as the first invention,
An H-shear mold entry side guide device in which a guide roller is supported by a support portion via a cushion mechanism.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, only the guide roller is in contact with the H-section steel on the H-shear mold entry side.
Therefore, even if a force such that the H-section steel is pressed against the guide roller and rubbed during shearing, the guide roller is
Since it rotates without resistance against irregular movement of the section steel in the passing direction, it is possible to effectively prevent the occurrence of scratches in the H section steel.

According to the second aspect of the present invention, since the cushion mechanism is interposed between the guide roller and the supporting portion, it is possible to absorb the shock transmitted through the H-section steel at the time of shearing, and the guide according to the first aspect of the present invention. The life of the device is extended.

[0016]

FIG. 1 is a sectional view showing a first embodiment of the present invention,
FIG. 2 is a view on arrow AA of FIG. 1 and 2,
Reference numeral 30 denotes a guide roller, 32 denotes a support portion, F at the end of the reference numeral means a flange, and W means a web. The same members as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIGS. 1 and 2, H according to the present invention is used.
The shear mold entry side guide device uses a guide roller 30 and a support portion 32 that supports the guide roller 30 as guide elements, and the guide elements are provided with upper and lower flange outer surfaces and web surfaces.
A plurality of H-shear molds 2 are arranged on the entrance side of the H-shear mold 2 so that the H-shear mold 2 can be guided by contacting only the above. In this embodiment, a guide element consisting of one guide roller 30F and its supporting portion 30F for guiding the upper and lower flange outer surfaces, and a guide element consisting of two guide rollers 30W and its supporting portion 32W for guiding the left and right web surfaces. The elements are mounted and arranged on the front surface of the fixed blade 7, respectively. As a result, the above-mentioned effects can be obtained,
It is possible to effectively prevent the occurrence of scratches on the H-section steel.

FIG. 3 is a sectional view showing an example of a cushion mechanism with respect to a guide element for guiding the outer surface of the flange.
Is a holder, 34 is a spring, 35 is a slide hole, 36 is a stop plate, 37
Is a bolt and 38 is a nut. The guide element that guides the web surface can be similarly configured. In this example, a spring is placed behind the holder 33 that supports the guide roller 30F.
34 is assembled, the holder 33 is slidably fitted in the slide hole 35 formed in the support portion 32F, and the compression allowance space of the spring 34 is secured to stabilize it with the bolt 37 and the nut 38 via the stop plate 36. ing. As a result, the impact transmitted to the guide device via the H-shaped steel 1 during shearing can be absorbed by the spring 34.

[0019]

EFFECTS OF THE INVENTION According to the present invention, it is possible to effectively prevent the scratches that tend to occur on the entry side when shearing H-section steel with H-shear.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a cross-sectional view showing an example of a cushion mechanism.

FIG. 4 is a side view of an essential part of the H-shear.

FIG. 5 is a sectional view of a conventional H-shear mold 2.

FIG. 6 is a view on arrow AA in FIG.

[Explanation of symbols]

 1 H-section steel 2 H shear mold 3 Travel control unit 4 Shearing drive unit 5 Hammer 6 Knocker 7 Fixed blade 8 Moving blade 9 Thread direction 10 Base plate 11 Side cover 12 Top cover 13 Knocker stopper 14 Slide block 15 Pusher 16 Sliding blade 17 Spring 18 Outgoing Guide Roller 19 Retainer 20 Flange Guide 21 Web Guide 22 H-Shaped Hole Blade 23 Cushion Flange 30 Guide Roller 32 Support 33 Holder 34 Spring 35 Slide Hole 36 Stopper 37 Bolt 38 Nut 38 F Flange Target W Web Target

Claims (2)

[Claims] 1. A guide element consisting of a guide roller and a support portion for supporting the guide roller is inserted into an H-shear mold so that the outer surface of the flange and the web surface of the H-section steel are guided only by the guide roller. A plurality of H-shear mold entry side guide devices, wherein a plurality of H-shear mold entry side guide devices are provided. 2. The H-shear mold entry side guide device according to claim 1, wherein the guide roller is supported by the support portion via a cushion mechanism.