JP3058910B2 - Method and apparatus for traveling cutting of P steel - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for continuously cutting a thin steel plate by roll forming to form a P-shaped cross section of a P steel, and an apparatus therefor. While being deformed, it can be cut to a predetermined length without being deformed.

[Conventional technology]

As shown in FIG. 9, a P steel 1 having a P-shaped cross section formed by processing a thin metal plate has a feature that it can secure considerable strength while being lightweight. It is used as a component material of a metal packing frame for packing and transporting wheel parts and finished products.

An example of a packaging frame formed by using such P steel 1 is a skid 2 serving as a bottom portion of a packaging frame A and housings disposed before and after the skid 2 as shown in an exploded view in FIG. The frames 3 and 4 are composed of side frames 5 and 6 arranged on the left and right sides of the skid 2 and a top frame 7 connecting the left and right side frames 5 and 6.

P steel 1 is used for most of the frame members 8 such as the columns and cross members of the frames 2 to 7 and the diagonal members 9 for reinforcement, and the frame members 8 and the diagonal members 9 are framed into predetermined shapes. After that, the frames are welded to form frames 2 to 7, respectively.

Therefore, in order to make one packing frame A, a considerable length of P
Steel 1 is required, and in order to make packing frame A efficiently,
It is necessary to efficiently manufacture the P steel 1 as the constituent material.

Therefore, it is conceivable to form the P steel 1 by roll forming while continuously supplying a metal thin plate.

[Problems to be solved by the invention]

However, when the P steel 1 efficiently formed by continuous roll forming is used as the packaging frame A, it must be cut to a predetermined length, and conventionally used for cutting a metal plate. When cutting is performed with a flying shear or the like, there is a problem that the hollow portion of the P steel is crushed or the length is not constant due to the crushing.

The present invention has been made in view of the above-mentioned problems of the related art, and provides a traveling cutting method and apparatus for a P steel capable of cutting a continuously formed P steel to a predetermined length without deformation. It is assumed that.

[Means for solving the problem]

In order to solve the above-mentioned problems, a running cutting method for P steel according to the present invention is characterized in that a metal thin plate is continuously roll-formed to form a P-shaped P steel having a double overlapped portion and a single bag portion, and a predetermined shape is formed. When cutting to the length of the P steel, the cutting device is supported in a cutting die in a state where the double overlapping portion of the P steel is turned up and the bag portion is turned down. At a predetermined position in synchronization with the feed rate, cutting is started from the vicinity of the double overlap portion on the center side of the bag portion of the P steel, and the bag portion is cut while cutting the double overlap portion after cutting the upper side of the bag portion. The vertical portion at the center is cut off, and the vertical portion outside the bag portion and the lower portion of the bag portion are cut and cut with a cutting punch.

Further, the running and cutting device for P steel of the present invention continuously roll-forms a thin metal plate to form a P-shaped P steel having a double overlapping portion and a single bag portion, and forms the steel into a predetermined length. An apparatus for traveling and cutting P steel to be cut, wherein the traveling table is reciprocally driven along a feeding direction of the P steel, and is mounted on the movable table and can be inserted in accordance with the outer shape of the P steel, and is upstream in the traveling direction. The cutting device is provided with a cutting die having a downstream side that is larger than the cutting die, and a cutting device having a cutting punch that is vertically driven between the cutting dies and has three arc portions to cut the P steel, and a feed speed of the P steel. A controller that controls the moving table and the cutting device so as to cut in synchronization with the feed speed of the P steel at the set position by traveling the moving table at the set cutting position, wherein the cutting punch comprises:
The lowermost pointed portion which is inserted in the vicinity of the double overlapped portion of the central portion of the P steel bag portion provided at the center portion and the lowermost pointed portion is provided and constitutes one of the pointed portions. A first arc portion capable of cutting the vertical portion on the center side of the double overlapping portion and the bag portion, and the other of the sharp portions provided to constitute the other of the sharpened portions. A second arc portion capable of cutting the upper and lower sides of the bag portion, and an outer vertical portion of the P steel bag portion provided adjacent to the second arc portion and starting to cut the double overlapping portion can be cut. And a third arc portion.

(Operation)

According to this method of cutting and running P steel, a thin metal plate is continuously roll-formed to form a P-shaped P steel having a double overlapping portion and a single bag portion, and cut into a predetermined length. At this time, the P steel is supported in a cutting die in a state where the double overlapping portion of the P steel is turned up and the bag portion is turned down, the cutting device is moved in the feed direction of the P steel, and synchronized with the feed speed of the P steel. At a predetermined position, start cutting near the double overlapping portion on the center side of the bag portion of the P steel, cut the upper side of the bag portion, and then cut the double overlapping portion while cutting the vertical portion on the center side of the bag portion. It is to be cut with a cutting punch that cuts and cuts off the vertical portion outside the bag portion and the lower portion of the bag portion, and has a P-shaped cross section composed of a double overlapping portion and a single bag portion. Even with P steel, deformation is prevented by the cutting dies and P It is to be cut to length without collapsing the bag portion so as to cut with a sequence of the cutting units.

Further, according to the traveling cutting device for P steel, a P steel having a P-shaped cross section composed of a double overlapping portion and a single bag portion is formed by continuously forming a roll of a thin metal plate to a predetermined length. An apparatus for traveling and cutting P steel to be cut, wherein the traveling table is reciprocally driven along a feeding direction of the P steel, and is mounted on the movable table and can be inserted in accordance with the outer shape of the P steel, and is upstream in the traveling direction. The cutting device is provided with a cutting die having a downstream side that is larger than the cutting die, and a cutting device having a cutting punch that is vertically driven between the cutting dies and has three arc portions to cut the P steel, and a feed speed of the P steel. A controller that controls the moving table and the cutting device so as to cut in synchronization with the feed speed of the P steel at the set position by traveling the moving table at the set cutting position, wherein the cutting punch comprises:
The lowermost pointed portion which is inserted in the vicinity of the double overlapped portion of the central portion of the P steel bag portion provided at the center portion and the lowermost pointed portion is provided and constitutes one of the pointed portions. A first arc portion capable of cutting the vertical portion on the center side of the double overlapping portion and the bag portion, and the other of the sharp portions provided to constitute the other of the sharpened portions. A second arc portion capable of cutting the upper and lower sides of the bag portion, and an outer vertical portion of the P steel bag portion provided adjacent to the second arc portion and starting to cut the double overlapping portion can be cut. The cutting die of the cutting device mounted on the moving table, even if it is a P steel having a P-shaped cross section composed of a double overlapping portion and a single bag portion. Synchronizes the carriage with the feed speed of P steel while preventing deformation by supporting In this way, the cutting punch is pushed in at a predetermined position in a synchronized state, and the cutting of each part of the P steel is performed in order and cut, so that the bag portion of the continuously formed P steel is reduced to a predetermined length without being crushed. Can be cut.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, a forming line of P steel to be cut according to the present invention will be described with reference to FIG.

An uncoiler 11 is provided on the P steel 1 forming line 10 so that a hoop 12 which is a thin metal plate is continuously supplied. Downstream of this uncoiler 11 is a hoop
12 Roll forming machine via worktable 13 for connecting and connecting
14 are provided.

In this roll forming machine 14, both side edges of the hoop 12 are gradually formed by multi-stage rollers, and are formed from a flat plate to a P-shaped cross section as shown in a forming process in FIG.

Downstream of the roll forming machine 14, a roll-formed P
A welding machine 15 for spot-welding the overlapped portion of the hoop 12 in a letter shape is provided.

The welding machine 15 is provided with a pair of upper and lower disk-shaped rotating electrodes, and determines welding conditions in which two overlapping portions of the P-shaped hoop 12 sent between the electrodes are determined according to a feeding speed or the like. Spot welding at regular intervals according to

Downstream of the welding machine 15, a pinch stand 16 and a strainer stand 17 are provided so as to correct deformation due to welding.

In order to cut the P steel 1 thus continuously roll-formed into a predetermined length, the P steel traveling cutting device 18 of the present invention is provided downstream of the welding machine 15.

Downstream of the traveling cutting machine 18, the cut P steel 1 is sent to a pillar or the like via a run-out table (not shown).

A P-steel forming line using the uncoiler 11 to the traveling cutting machine 18, and a run-out table,
10 are configured, and each device is controlled by a detection signal of a detector such as a measuring stand 19 installed on the exit side of the roll forming machine 14 and a control signal from an NC operation panel 20 as a controller. ing.

Next, an embodiment of the traveling cutting apparatus for P steel of the present invention provided in such a P steel forming line will be described.

1 to 3 show an embodiment of a traveling steel cutting apparatus for P steel according to the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a cross sectional view.

The P steel traveling cutting device 18 is configured to cut a P steel and perform drilling.

In the traveling cutting device 18, a frame 22 is provided on a base 21 and a fixed base 23 is provided along the feed direction X of the P steel 1. At four corners of the fixed base 23, die posts 24 are mounted so as to be able to move up and down through bearings, and a pressing plate 25 is mounted above the four die posts 24 in parallel with the fixed base 23, The pressure plate 25 is attached so that the vertical distance between the pressure plate 25 and the fixed table 23 can be changed while maintaining the parallel state.

A pressurizing crank press mechanism 26 is connected to the lower part of the die post 24, and a pressurizing plate 25 is
Are driven up and down.

A movable table 28 that is driven to travel in the feed direction X of the P steel 1 is provided between the fixed table 23 and the pressing plate 25. Fixed stand 23
A pair of guide rails 29 is mounted on the upper surface of the guide plate 25 and the lower surface of the pressure plate 25, respectively. An upper movable platform 28a and a lower movable platform 28b are movably mounted in grooves on the side surfaces of each guide rail 29. Between the upper carriage 28a and the lower carriage 28b,
Two guide posts 30 are provided, and vertical moving tables 28a and 28b
Is the reference for the alignment.

A rack 32 is mounted on the entry side of the lower moving table 28b to drive the moving table 28 in the feed direction X of the P steel 1, and a pinion 33 meshing with the rack 32 is mounted on the base 21 with a speed reducer.
It is driven by a DC motor.

Accordingly, the movable table 28 is driven by the DC motor 34 in the feed direction X of the P steel 1 and its traveling speed can be synchronized with the feed speed of the P steel 1.

On this movable table 28, a cutting device 35 for P steel 1 is mounted, and two drilling devices 36, 37 are mounted.

Since the mounting of the cutting device 35 and the punching devices 36 and 37 on the moving table 28 has substantially the same configuration, the cutting device 35 is used as an example.
This will be described with reference to FIGS.

Two suspending rods 38 are attached to the upper moving table 28a in correspondence with the cutting device 35, and a tool mounting plate 39 is supported on the suspending rods 38 so as to be able to move up and down. Cutting punch 41a is attached. A cutting die 41b of the cutting tool 41 is supported on the lower movable table 28b facing the cutting punch 41a.

A cylinder 42 for selectively transmitting the pressing force of the pressure plate 25 only at the time of cutting is attached to the upper moving table 28a, and a tool selection piece 43 is attached to the tip of the rod.

Accordingly, by extending the rod of the cylinder 42 and positioning the tool selection piece 43 on the tool mounting plate 39, the pressing force due to the lowering of the pressure plate 25 is transmitted to the tool mounting plate 39, and the cutting punch 41a is pushed down to perform cutting. The tool selection piece 43 is retracted from above the tool mounting plate 39, so that the tool mounting plate 39 can be prevented from being cut without being pressed down regardless of the lowering of the pressing plate 25.

As described above, the cutting tool 41 of the P steel 1 that cuts the P steel 1 includes the cutting punch 41a and the cutting die 41b, and has a structure capable of cutting without deforming the P steel 1. I have.

That is, the cutting punch 41a of the cutting tool 41
As shown in the figure, the thickness is about 3 mm in a plate shape, and the cutting edge portion at the lower end is formed by combining three arc portions 41a-1 to 41a-3. The connecting portion between the arc portions 41a-1 and 41a-2 is sharpened downward substantially at the center corresponding to the overlapping portion, and the two arc portions 41a-2, 4 correspond to the bag portion of the P steel 1.
1a-3 are continuously formed.

Further, as shown in FIG. 5, the cutting die 41b of the cutting tool 41 has a structure divided into front and rear, and a gap for the cutting punch 41a is formed in the divided surface portion so as to penetrate vertically.
The cutting punch 41a moves up and down via a predetermined clearance. The cutting die 41b is used for smoothing the vertical movement of the cutting punch 41a and for cooling.
An oil groove 44 is formed in the divided surface of the, and the cutting oil is circulated and supplied by an oil supply pump 45.

A support hole 46 for inserting and supporting the P steel 1 as a material to be cut is formed through the center of the cutting die 41b in the vertical direction, and the periphery thereof is a lower blade. P steel 1 so that it can be inserted with the bag part of
It has a cross-sectional shape corresponding to the external shape. And this P
The supporting hole 46 serving as a lower blade for inserting the steel 1 is provided with a cutting punch 41a.
The downstream side is larger than the upstream side across the
The size is such that it can be fed smoothly even if only

The P steel traveling cutting device 18 is controlled by an NC operation panel 20 that controls a forming line of the P steel 1. NC data necessary for the NC control is input in advance, and the P steel is cut. The feed speed 1 is measured by the measuring stand 19, and the position and speed of the moving table 28 are input from a position detector, a speed detector, and the like provided on the moving table 28.

In addition, as for the punching devices 36 and 37, similarly to the cutting device 35, a punch is mounted via a tool holder to a tool mounting plate supported by a hanging rod, and a die is mounted on the lower moving table 28b. The necessity of drilling can be selected by the tool selection piece.

Next, the operation of the traveling cutting device 18 for P steel and the traveling cutting method will be described.

Before the traveling cutting of the P steel 1, the forming line 10
The forming speed and the cutting length of the P steel 1 are input to the NC operation panel 20 for controlling the operation.

In the forming line 10, the hoop 12 rewound by the uncoiler 11 and supplied to the roll forming machine 14 is continuously formed in a P-shaped cross section, and then passed through a measuring stand 19 to a welding machine.
It is sent to a pinch stand 16 and a strainer stand 17 after spot welding is performed at regular intervals according to welding conditions determined by a molding speed (feed speed) and the like.

The P steel 1 whose bending and twist are corrected in this way is sent to the traveling cutting device 18.

Then, based on the feed speed of the P steel 1 and the current position of the moving table 28, the NC control panel 20 sets the speed and P of the moving table 28 at the cutting position.
The control signal is transmitted to the moving table 28 so that the feed speed of the steel 1 is synchronized.
Is output to the DC motor 34 that drives the motor, and the start and speed of movement are controlled. Simultaneously with the control for synchronizing the moving table 28, the tool selecting piece 43 is moved to the upper moving table 28a and the tool mounting plate 39 for cutting. Is output to the cylinder 42.

When the moving table 28 is synchronized with the feed speed of the P steel 1 at the cutting position, the crank press mechanism of the cutting device 35 is turned on.
A drive command is output to the pressurizing motor 27 to drive the pressurizing plate 25.

When this pressure plate 25 is pressed down, the tool selection piece
The tool mounting plate 39 is pushed down via 43 and the tool holder 40
The cutting punch 41a attached to the P steel 1 is pushed between the cutting dies 41b, and the P steel 1 is cut.

In the process of cutting the P steel 1, as shown in FIG. 6, the state of the cutting punch 41a of the cutting tool 41 is as follows. At the end of the bag portion of the P steel 1, the thin metal plate enters a portion where two sheets do not overlap, and cutting is started.

Then, at the same time as the upper side of the bag portion of the P steel 1 is cut, the portion where the two thin metal plates overlap is cut and the vertical portion at the center of the bag portion is also gradually cut.

Further, when the cutting punch 41a is pushed in, the cutting of the vertical portion outside the bag portion is started immediately before the cutting of the central vertical portion of the bag portion of the P steel 1 is started, and simultaneously with the lower portion of the bag portion. It is cut and the cutting of the P steel 1 is completed.

With the P steel 1 inserted and supported in the cutting die 41b in this manner, the P steel 1 is cut by the cutting punch 41a in which the three arc portions 41a-1 to 41a-3 are combined,
The bag portion of the P steel 1 can be cut without being crushed, and uneven length of the cut due to the crushing can be prevented.

Further, when cutting the P steel 1, the P steel 1 is supported in the cutting die 41b with the bag portion down, and the cutting is started from a flat surface. Can be cut without crushing.

Further, the shape of the cutting punch 41a is changed to three arc portions 41a-1.
4141a-3, which cuts each part of the P steel 1 in order to prevent deformation of the P steel 1 compared to cutting with a straight cutting punch. Can be.

When one cut of the P steel 1 is completed in this way, a control signal is output from the NC operation panel 20 in preparation for the next cut, and
The control is repeated to return to the original position, or to advance from the same position depending on the cutting length, and cutting is continuously performed.

Further, when drilling the P steel 1, a cutting device
The 35 tool selection pieces 43 are retracted from between the tool mounting plate 39 of the cutting device 35 and the upper moving table 28a, and instead, the tool selection pieces provided in the drilling devices 36 and 37 are inserted by the cylinder, and the pressure plate is pressed. Drill holes by descending 25.

It is also possible to perform cutting and drilling simultaneously.

Therefore, one crank press mechanism 26 uses a cutting device.
35 and two drilling devices 36 and 37 can be driven, and the size of the device can be reduced.

In the case of drilling, the signal from the NC operation panel 20
Control is performed so that the feed speed of the P steel 1 and the moving table 28 are synchronized at the drilling position.

According to such a traveling cutting method for P steel, the cutting die
Since the moving table 28 is cut in synchronization with the feed speed at the cutting position while the P steel 1 is supported in the inside of the 41b, it is possible to prevent the change of the continuously formed P steel 1 while preventing the change. Can be cut accurately to length.

Therefore, by adopting such a P steel cutting method and a cutting apparatus, it is possible to efficiently manufacture a packaging frame requiring a large amount of P steel.

The drive mechanism of the moving table in the above embodiment is not limited to the rack-and-pinion configuration, and other mechanisms can be used.

Further, changes may be made to each component without departing from the spirit of the present invention.

〔The invention's effect〕

As described above, the present invention has the following effects, as specifically described with the embodiment.

According to this method of cutting and running P steel, a thin metal plate is continuously roll-formed to form a P-shaped P steel having a double overlapping portion and a single bag portion, and cut into a predetermined length. At this time, the P steel is supported in a cutting die in a state where the double overlapping portion of the P steel is turned up and the bag portion is turned down. At a predetermined position, start cutting near the double overlap portion on the center side of the bag portion of the P steel, cut the upper portion of the bag portion, cut the double overlap portion, and cut the vertical portion on the center side of the bag portion. Since it is made to cut with a cutting punch that cuts and further cuts off the lower part of the outer part of the bag part and the lower part of the bag part, a cross section consisting of a continuously overlapping double overlapping part and a single bag part Cutting of P-shaped P steel while preventing deformation by cutting dies It can be cut to length without collapsing the bag portion by cutting with a sequence in the cleavage of each part of the P steel bench.

According to this P steel traveling cutting device, a P steel having a P-shaped cross section composed of a double overlapping portion and a single bag portion is formed by continuously forming a roll of a thin metal plate and cut into a predetermined length. P
A traveling cutting device for steel, wherein the traveling table is reciprocated along the feed direction of the P steel, and is mounted on the traveling table and can be inserted in correspondence with the outer shape of the P steel, and is compared with the upstream side in the traveling direction. A cutting device having a cutting die having an enlarged downstream side and a cutting punch having three arc portions which are vertically driven between the cutting dies and capable of cutting P steel, and a cutting position preset by the feed speed of the P steel And a controller for controlling the moving table and the cutting device so as to cut in synchronization with the feeding speed of the P steel at the set position by traveling the moving table at a set position, wherein the cutting punch is provided at a central portion and the P steel is provided. A lowermost pointed portion which is inserted near the double overlapping portion at the center end of the bag portion, and a double overlapping portion of P steel and a bag portion which constitute one of the sharpened portions and are provided. A first arc portion capable of cutting a central vertical portion of the A second arc portion provided so as to constitute the other of the above-mentioned portions and capable of cutting the upper and lower sides of the P steel bag portion after the start of cutting the double overlapping portion of the P steel, and adjacent to the second arc portion. And a third arc portion capable of cutting the outer vertical portion of the P steel bag portion after the cutting of the double overlapping portion is started, so that the double overlapping portion and the single bag portion are provided. Even in the case of the P steel having a P-shaped cross section, while traveling by moving the movable table in synchronization with the feed speed of the P steel, while preventing deformation by supporting by a cutting die of a cutting device mounted on the movable table, By pressing a cutting punch at a predetermined position in a synchronized state and cutting each part of the P steel in order, it is possible to cut the continuously formed P steel bag into a predetermined length without crushing it. it can.

[Brief description of the drawings]

1 to 3 relate to an embodiment of a traveling steel cutting apparatus for P steel according to the present invention. FIG. 1 is a front view, FIG. 2 is a plan view, and FIG.
The figure is a cross-sectional view. 4 to 6 relate to an embodiment of a traveling steel cutting apparatus for P steel according to the present invention, and FIG. 4 is a side view and a front view of the cutting apparatus.
FIG. 5 is a front view and a plan view of the cutting tool, and FIG. 6 is an explanatory view of a cutting process. 7 and 8 are a side view and an explanatory view of a roll forming process of a P steel forming line to which the present invention is applied. FIG. 9 is a perspective view of a P steel to be cut according to the present invention. FIG. 10 is an exploded perspective view of a packaging frame using P steel as a constituent material. 1 ... P steel, 18 ... traveling cutting device, X ... feed direction, 19
…… Measurement stand, 20 …… NC operation panel (controller), 25 …… Pressing plate, 26 …… Crank press mechanism, 28…
… Moving stand, 29 …… guide rail, 32 …… rack, 33 ……
Pinion, 35 ... Cutting device, 36, 37 ... Drilling device, 38
... hanging rod, 39 ... tool mounting plate, 40 ... tool holder, 41 ... cutting tool, 41a ... cutting punch, 41b ... cutting die, 41a-1 to 41a-3 ... arc part, 42 ... ... Cylinder, 43 ... Tool selection piece, 44 ... Oil groove, 46 ... Support hole.

Claims (2)

(57) [Claims] 1. A steel sheet is continuously roll-formed to form a P-shaped P steel having a double overlapped portion and a single bag portion and cut into a predetermined length. The P-steel is supported with the double overlapped portion facing up and the bag portion down, and the cutting device is run in the P-steel feed direction. Start cutting near the double overlapping part on the center side of the steel bag part, cut the upper part of the bag part, cut the double overlapping part, cut the vertical part on the center part of the bag part, and further cut the bag part A traveling cutting method for P steel, wherein the cutting is performed with a cutting punch that cuts off and separates the outer vertical portion and the lower portion of the bag portion. 2. A running and cutting apparatus for P-steel, which forms a P-shaped P-steel having a double overlapped portion and a single bag portion by continuously rolling a thin metal plate, and cutting the P-shaped steel to a predetermined length. A traveling platform reciprocally driven along the feed direction of the P steel;
A cutting die mounted on this movable table and capable of being inserted in accordance with the outer shape of the P steel and having a downstream side larger than the upstream side in the traveling direction and a cutting die having three arc portions which are vertically driven between the cutting dies. A cutting device with a cutting punch capable of cutting
A controller that controls the moving table and the cutting device to travel on the moving table at a cutting position set in advance by the feeding speed of the P steel and cut at the set position in synchronization with the feeding speed of the P steel; A cutting punch is provided in the center, is inserted near the double overlapping portion of the center side end of the P-steel bag, and forms a lowermost pointed portion, and one of the pointed portions. A first arc portion provided to cut a double overlapping portion of P steel and a vertical portion on the center side of the bag portion; and a cutting start of the double overlapping portion of the P steel provided to constitute the other of the pointed portions. A second arc portion capable of cutting the upper and lower sides of the P-steel bag portion later; and an outer vertical portion of the P-steel bag portion provided adjacent to the second arc portion after cutting of the double overlapping portion is started. And a third arc portion capable of cutting the P steel. Travel cutting device.