JPH02262909A - Shape steel shearing device - Google Patents

Abstract

PURPOSE:To shear at a low cost with high precision and in a short time even if the shape and size of a shape steel are different from nominal ones, by providing partially at a moving blade holder and a fixed blade holder moving blades and fixed blades as a divided type, and also, in such a way that they can be regulated positionwise or can be exchanged. CONSTITUTION:A moving blade holder 1 having holes whose purpose is for fixing at a slide, is provided partially with moving blades 3 at the perimeter of a hole portion 2, and in the case of a shearing direction being an arrow one, constitution is made with blade portions 31, 32, 33, and position regulation and exchange can be made according to the size of a worked matter. The shape and size of the hole portion 7 of a fixed blade holder 6 having holes 10 whose purpose is for fixing at shearing device main body, are approximately the same with the shape and size of the hole portion 2 of the moving blade holder 1, and fixed blades 8 are provided partially at the perimeter of it, and in the case of the shearing direction being an arrow one, constitution is made with blade portions 81, 82, 83, and position regulation and exchange can be made. The fixed blade holder 6 is furnished at a shearing device with an appropriate clearance from the moving blade holder 1 secured, and a main body frame is moved by means of a hydraulic cylinder or the like by fixing the moving blade holder 1 at the slide at which a shearing direction is regulated anglewise by swinging the lowest point to a fulcrum, and shearing is done.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a shearing device for section steel, and more specifically, it relates to shearing devices for section steel, and more specifically, for shearing devices such as H section steel, angle section m (equal diameter section steel, scalene angle section steel, scalene angle section steel). The present invention relates to a shearing device capable of shearing shaped steel such as equal-thickness angle-shaped steel, engineering shaped steel, groove shaped steel, flat shaped steel, T-shaped steel, etc., with a beautiful fracture surface and in a short time.

(Prior art) When shearing steel materials, it is relatively easy to shear steel materials with simple cross-sectional shapes such as plates, rods, and wires, but in the case of complex cross-sectional shapes such as H-beams, it is difficult to shear efficiently. No method exists.

For example, typical methods for shearing these sections include:
There are methods such as using a circular saw, a band saw, or gas cutting, but all of them have the problem that the shearing time is long, the sheared surface is rough, and the sheared dimensional accuracy is poor due to the generation of chips.

In addition, there were other problems such as the lifespan of the cutlery was short and the work involved was dangerous.

(Problems to be solved by the invention) In order to solve these problems regarding shearing of section steel,
Previously, the applicant proposed a shearing device that uses a movable blade and a fixed blade that have a hole with a shape and size that is approximately the same as the cross section of the section steel (
JP-A-51-123985).

However, although this shearing device can shear in a short time, there is a limit to the dimensional accuracy of shearing because some cracks occur during shearing, and the cross section of the section is not necessarily exactly the same as that of the section, so it is difficult to remove the sheared part. It is necessary to remove the dust or remove the dust.

In extreme cases, the steel sections buckle and become impossible to shear, so improvements have been desired.

In addition, all of the movable blades and fixed blades must be made of expensive materials such as cemented carbide tool steel, which poses a cost problem. Furthermore, even if the shape of the steel section to be sheared is the same, it is often the case that the dimensions are slightly different from the nominal dimensions. This required preparation, which increased costs and was not easy to work with.

The present invention was made in order to solve the problems in the above proposal, and even if a section steel has a shape different from the nominal shape, it can be produced in a short time, with high shear dimensional accuracy, and at low cost. The object of the present invention is to provide a section steel shearing device capable of shearing.

(Means for Solving the Problems) In view of the above-mentioned problems, the present inventor has diligently improved the configurations of the movable blade and fixed blade in the previous proposal.

As a result, most of the steel sections have slightly different shapes or dimensions from their nominal shapes, and the different dimensions, especially at the corners, make it impossible to shear with high precision, and in some cases, problems such as buckling can occur. found. In contrast, theoretically,
It would be possible to measure the shape and dimensions of each steel section to be sheared each time, and use movable blades, fixed blades, and shearing blades with holes in each holder designed to match the dimensions, but this is an extremely unrealistic solution. It is a strategy.

Therefore, as a result of further intensive research in order to practically solve these problems, we designed the dimensions of the holes formed in each holder of the movable blade and fixed blade to be the same as or slightly larger than the nominal dimensions. By using a shearing method in which the movable blade and the fixed blade are partially divided around the hole of each holder, and the position of each blade is adjustable or replaceable, It was discovered that a sheared surface having the same shape and dimensions as the section of a section steel can be obtained, and the present invention has been made based on this discovery.

That is, the shaped steel shearing device according to the present invention is an apparatus for shearing shaped steel such as H-shaped steel, and includes a movable blade holder having a hole having the same or substantially the same dimensions as the nominal shape and dimensions of the section of the shaped steel. The movable blade holder has a fixed blade holder, and the movable blade holder has a blade part that can be partially adjusted in position around the hole, while the fixed blade holder has a blade part that can be partially adjusted in position around the hole. The present invention is characterized in that the movable blade holder is moved at a constant angle of inclination with respect to the longest side of the shaped steel to perform shearing.

The present invention will be explained in detail below with reference to the drawings.

(Example) Generally, shearing is performed by using a movable blade and a fixed blade, each equipped with a sharp cutting edge, made of the same material such as cemented carbide tool steel, and meshing them sequentially along the cutting line of the workpiece. It is a process in which the workpiece is cut by action, and the angle required for shearing is obtained by sequentially meshing the movable blade and the fixed blade.

In contrast, the shearing method according to the present invention uses a movable blade and a fixed blade, but simultaneously shears all sides of the shaped steel, and can be said to be similar to press cutting.

The first feature of the present invention that realizes this shearing method is that the movable blade and the fixed blade each have a holder, and each holder has a hole, and the shape of the hole is similar to that of the workpiece. It has the same or substantially the same dimensions as the nominal cross-sectional dimensions of the section steel. In reality, most of the individual steel sections that are processed have different shapes and dimensions than their nominal shapes.
It is preferable to take this fact into consideration in advance and set the hole portion based on the nominal shape and dimensions. By configuring the hole portion to have a slightly larger size than the nominal shape dimension and the path distance by 1, it becomes easier to charge the section steel that is the workpiece.

Further, the second feature of the present invention is that the movable blade and the fixed blade have blade parts that are partially divided around the hole of the holder, and each blade part is further adjustable in position or replaceable. That's a certain point. Since the hole is based on the nominal shape and size,
By making the blade part split and making the position adjustable or replaceable, it is possible to handle shaped steel of various sizes. especially,
Dimensional errors in corner parts can be adjusted with high precision. It also becomes easy to replace the blades at all locations or at specific locations. Of course, since the blade portions are partially arranged, there is also a cost reduction effect.

Although it is conceivable to provide the blade parts of the movable blade and the fixed blade separately all around the hole as in the previous proposal, subsequent research by the present inventor has shown that this method can be used to When shearing, the blade part that greatly contributes to the shearing is the part on the front side in the direction of movement (shearing direction), and the corner part is where shearing accuracy is most important. It has been found that it is not necessary to provide the blade portions all around the area, but it is sufficient to place the blade portions partially in the necessary locations. In addition, if the split blade part is provided all around the hole so that its position can be adjusted, there will be a blade part that hardly needs to be adjusted, which is wasteful, and the position of the blade part that actually needs to be adjusted will be When trying to do so, the adjacent blades get in the way, making it difficult to adjust the position, resulting in poor workability, and the existence of blades whose positions are not properly adjusted will actually impair shearing accuracy. There also arises the problem of the strength of the blade.

Next, the configuration of the blade portions of the movable blade and the fixed blade in the present invention will be explained by taking as an example a case where an H-section steel is sheared as a section steel.

Figure 1 shows the movable blade and its holder.

In FIG. 1, reference numeral 1 denotes a movable blade holder, which is provided with a hole 2. A movable blade 3 is attached around this hole 2. This movable blade 3 is partially provided around the hole 2, and as shown in FIG. 2, when the shearing direction is from the upper left to the lower right in the figure (arrow in the figure) It is composed of three blade parts: , blade part 31.32.3,
A mounting hole 4 for fixing to the holder 1 is bored in each blade part at a suitable position, and the position can be adjusted or replaced depending on the size (cross-sectional shape and dimensions) of the workpiece. 5
is a mounting hole for fixing the holder 1 to a slide (described later).

As an embodiment in which the blade portion of the movable blade 3 is partially provided, the blade portion is arranged at least all around the hole 2 on the front side with respect to the shearing direction (moving direction).

In the case of the H-shaped steel shown in the figure, the flange part 2 near the shear direction
The blade part 31 is on the entire front side (left side) of □, the blade part 3 □ is on the lower half of the front side (left side) of the far flange part 22, and the upper half and web part 2. The blade part 3 is on the entire front side (upper side). Place each.

In this case, especially the respective corner portions, namely the upper right corner portion 21G of the left flange portion 2□ and the lower left corner portion 2□ of the right flange portion 2□. It is preferable to arrange a blade portion that conforms to the shape of the steel section, considering that the variation in shape and size of the section steel is greatest at these corner portions (R portions). In addition, considering the strength of the blade part, the blade part 3□ should be replaced by the web part 2.
．． The blade part 3. It is also possible to have a shape that extends to the upper fabric side of the left flange portion 2□.

Of course, an embodiment in which the blade portion is further divided is also possible.

On the other hand, regarding the fixed blade, as shown in FIG. 3, a hole 7 is provided in the fixed blade holder 6. The shape and dimensions of the hole are the same or substantially the same as the shape and size of the hole 2 of the movable blade holder 1. A fixed blade 8 is attached around this hole 7. This fixed blade 8 is configured to be partially provided around the hole 7, and as shown in FIG. 4, when the shearing direction is from the upper left to the lower right in the figure (arrow in the figure) , consists of three blade parts 8□, 8□, and 83, and each blade part has a mounting hole 9 drilled at an appropriate location for fixing it to the holder 6. It is possible to adjust the position or replace it. Reference numeral 10 denotes a mounting member for fixing the holder 6 to the shearing device main body.

Regarding the blade configuration of the fixed blade with respect to the corner portion, it is preferable to consider the same points as in the blade configuration of the movable blade described above.

The shape of each holder 1.6 can be determined as appropriate, and may be square as shown in the figure, or other shapes (circular, circular, etc.).
rectangular shapes, etc.) are also possible.

Furthermore, in the case of the movable blade holder and fixed blade holder for H-section steel shown in Figs. 1 and 3, these holes 2,
Other shaped steel (upper shape, etc.) with cross-sectional dimensions that approximately conform to 7.
It also has an effect that can be applied to shearing flat steel.

Next, a description will be given of the movable blade, the fixed blade, and their holders when the workpiece is a steel section other than H section steel.

When the workpiece is angle iron, the fifth
As shown in the figure, the movable blade holder has hole portions 2□, 2. The movable blade 3 is composed of a blade part 3□ and a blade part 33. As shown in FIG. 5(b), the vertical portion of the blade portion 33 may be extended upward. On the other hand, regarding the fixed blade, as shown in Fig. 7, the fixed blade holder has holes 7□, 7
3, and the fixed blade 8 has a blade portion 81.8. It consists of As shown in FIG. 7(b), the horizontal portion of the blade portion 83 may be extended in the right direction.

When the workpiece is groove-shaped steel (C channel steel), as for the movable blade, as shown in FIG. 6, the movable blade holder has holes 21.22.2. The movable blade 3 has a blade part 31 and a blade part 3. It consists of As shown in FIG. 6(b), the vertical portion of the blade portion 33 may be extended upward. On the other hand, regarding the fixed blade, as shown in FIG. 8, the fixed blade holder has holes 71, 73, 73, and the fixed blade 8
is composed of a blade portion 81.8□. As shown in FIG. 8(b), the horizontal portion of the blade portion 83 may be bent to extend in the upper right direction.

It goes without saying that the structures of the movable blade and its holder and the fixed blade and its holder in the case of other shaped steel sections can be constructed in the same manner.

Next, the drive mechanism of the shearing device equipped with the movable blade and fixed blade configured as described above will be explained.

A movable blade holder 1 equipped with a movable blade 3 is moved in the shearing direction (movement direction) within the shearing device body frame for shearing.
It is configured to be movable. As the moving mechanism, an eccentric shaft mechanism (FIG. 9), a fluid pressure mechanism (e.g., hydraulic cylinder) (FIG. 10), or another mechanism can be used, and the movable blade holder 1 is moved through the slide 11. Moving.

In the case of the eccentric shaft mechanism shown in FIG.
6 via a drive arm 17, and by movement of the drive arm 17, it can move within the groove using the inner surface of the groove (space) 13 formed in the main body frame 12 as a guide surface 14. action is achieved.

In the case of the hydraulic cylinder mechanism shown in FIG. 10, the slide 11 to which the movable blade holder 1 is fixed is moved within the groove by the hydraulic cylinder 18 using the inner surface of the groove (space) 13 formed in the main body frame 12 as the guide surface 14. The shearing action can be achieved. In this case, if the main body frame 12 in which the slide 11 is movably housed is separated from the other main body frames, and the main body frame 12 is made to be able to swing around the lowest point (lower right in the figure) as a fulcrum, Direction of movement(
The shearing direction) can be adjusted, and a moving direction suitable for the shape of the section steel, such as 45°±15°, can be secured. Further, if the movable blade holder 1 is made into a circular shape and is rotatably attached to the slide 11, the angle of the movable blade holder 1 with respect to the moving direction can be adjusted, and in this case, it may be locked using a hydraulic cylinder or the like.

On the other hand, the fixed blade holder 6 to which the fixed blade 8 is attached is attached to the shearing device so that an appropriate clearance can be secured between the fixed blade holder 6 and the movable blade 3 (movable blade holder 1). In that case, for maintenance and the like, it is desirable to attach the fixed blade holder 6 to the shearing device using an opening/closing mechanism (for example, a single door type).

In addition, in order to smoothly charge the shaped steel, which is the workpiece, into each hole 2.7 of the movable blade holder 1 and the fixed blade holder 6 attached to the shearing device, a material supply device such as a guide is provided as appropriate. Needless to say.

It is desirable that this material supply device be capable of appropriately adjusting the orientation of the section steel.

In order to shear the section steel, as shown in Fig. 11, a movable blade,
That is, although it is necessary to move the movable blade holder at a constant inclination angle (shear angle), it is preferable that the inclination angle is approximately constant with respect to the longest side of the section steel. When shearing H-shaped steel with the movable blade holder and fixed blade holder placed in the positions shown, the inclination angle is 45°.
It is desirable to do so. Of course, it is possible to shear by changing this 45° to an appropriate angle, for example, ±15°. Movable blade 3 of movable blade holder 1 attached to slide 11
1.32.3. By simply moving a short distance from the solid line position to the broken line position shown in the figure, any shaped steel section W can be sheared in a short time (-instantly), and the same sheared surface can be obtained.

(Effects of the Invention) As explained above, according to the present invention, as a method of shearing a section steel using a movable blade and a fixed blade, the movable blade and the fixed blade are split types and can be partially adjusted in position or replaced. Since the shearing surface is the same as the cross section of the shaped steel of the workpiece, even if the shaped steel has a shape different from the nominal shape, it can be sheared with high precision and in a short time. Moreover, since the movable blade and the fixed blade are each of a split type and the blade portions only need to be provided partially, the cost is lower than when the movable blade and the fixed blade are provided over the entire surface.

[Brief explanation of drawings]

Fig. 1 is an explanatory plan view showing a movable blade and a movable blade holder; Fig. 2 is an explanatory plan view showing an example of the arrangement of the blade portion of the movable blade; Fig. 3 is an explanatory plan view showing a fixed blade and a fixed blade holder; The figure shows an example of the arrangement of the blade part of the movable blade, Fig. 5 (a)
, (b) and FIGS. 7(a) and (b) are diagrams showing examples of the arrangement of the blade portion of a movable blade or a fixed blade when the workpiece is angle iron,
Figure 5 shows the case of a movable blade, Figure 7 shows the case of a fixed blade, and Figures 6 (, ), (b) and 8 (, ), (b) show the case where the workpiece is a groove-shaped steel. Fig. 6 shows the case of a movable blade, Fig. 8 shows the case of a fixed blade, and Fig. 9 and 10 show examples of the arrangement of the blade part of a movable blade or a fixed blade. FIG. 11 is a diagram illustrating the procedure for shearing a section steel according to the present invention. DESCRIPTION OF SYMBOLS 1...Movable blade holder, 2...Hole of movable blade holder, 3...Movable blade, 6...Fixed blade holder, 7...
・Hole of fixed blade holder, 8...Fixed blade, 11...
Slide, 12...Body frame, 13...Groove, 1
4...Guide surface, W...Shaped steel (workpiece). Figure 1

Claims (3)

[Claims] (1) A device for shearing a section steel such as an H-section steel, which has a movable blade holder and a fixed blade holder each having a hole having the same or approximately the same dimensions as the nominal dimensions of the cross section of the section steel, and the movable blade holder The holder has a blade portion partially adjustable in position around the hole, while the fixed blade holder has a blade portion partially adjustable in position around the hole,
A shaped steel shearing device characterized in that shearing is performed by moving the movable blade holder at a constant angle of inclination with respect to the longest side of the shaped steel. (2) The movable blade holder has substantially the entire area around the hole (including corner portions) facing the front side in the moving direction.
2. The device according to claim 1, wherein the device has a blade configuration comprising a blade at the tip of the blade. (3) The movable blade holder has substantially the entire area around the hole (including corner portions) on the back side in the direction of movement.
3. The device according to claim 1, wherein the device has a blade configuration including a blade at the top.