JP2021079435A - Method of taking out tailored blank - Google Patents

Abstract

To provide a method of reliably adsorbing tailored blank of a top level and taking out the tailored blank by using the existing adsorbing means.SOLUTION: A method of taking out tailored blank includes a stuck lifting step 51 of independently driving a plurality of lifters to lift the stuck placed on a mounting base until upper surfaces of thin-thickness areas approximately flush with upper surfaces of thick-thickness areas and an upper end arrives a taking-out position preset beforehand, an absorption step 52 of lowering an adsorption part up to the taking-out position to adsorb the adsorption part onto a top level tailored blank, a blank lifting step 53 of allowing the adsorption means to lift the adsorption part to lift only the top level tailored blank, a transportation step 54 of transporting the top level tailored blank to another position and desorbing the adsorption part from the top level tailored blank and a pitch lifting step 55 of lifting the stuck as much as the thickness of the taken-out tailored blank.SELECTED DRAWING: Figure 3

Description

The present invention relates to a method for taking out a tailored blank, and more particularly to a method for taking out a top-level tailored blank located at the top of the stack.

In the field of metal processing, a step of cutting a long sheet body into blanks of a desired size and stacking them to form a so-called stack is performed.
Then, the stack is moved to a predetermined processing apparatus position, blanks are taken out one by one from the stack, and metal processing such as press processing is performed.

For example, as a method of taking out blanks one by one from such a stack, a work suction holding method using an air cylinder is known (see, for example, Patent Document 1 or 2). In such a work suction holding method, the suction means connected to the lower end of the piston of the air cylinder sucks and holds the uppermost work (blank) of the stack supported by the lifter, and then raises the piston to obtain the maximum. The top blank is separated and removed from the stack by lifting the top blank.

By the way, in recent years, a so-called tailored blank, in which end faces of blank pieces having different thicknesses are brought into contact with each other and welded integrally, has been attracting attention as a target of press working.
In a stack in which tailored blanks are laminated, a step is generated between a portion in which thick blank pieces are laminated (thick-walled region) and a portion in which thin-walled blank pieces are laminated (thin-walled region). Moreover, since the size of the step changes each time the tailored blank is taken out, for example, a spring or the like is attached to the arm of the suction means so that the step can be absorbed, and the highest tailored blank is taken out from the stack.

JP-A-2009-142948 JP-A-2010-194567

However, in the case of the special specification in which a spring or the like is attached to the above-mentioned suction means, the weight of the spring increases, so that there is a problem that a weight load corresponding to the amount is applied to the suction means. In this case, from the viewpoint of inertia, the driving speed of the suction means is lowered, and the suction accuracy is also lowered.
Further, in the portion where the thin blank pieces of the tailored blank are laminated, the upper end thereof is curved in view of the end face, so that the suction portion of the suction means may not be able to suck the upper surface thereof ((b) in FIG. 1). )reference).
In addition, there is a drawback that it takes time and effort because it is necessary to replace the spring of the suction means so as to correspond to the rod by changing the setup of the tailored blank.

The present invention has been made in view of the above circumstances, and a method for taking out a tailored blank, which can use a suction means having existing specifications and can surely suck and take out the uppermost tailored blank. The purpose is to provide.

As a result of diligent studies to solve the above problems, the present inventors have conducted a plurality of cases until the upper surfaces of the thin-walled region and the thick-walled region are substantially flush with each other and the upper ends thereof reach a preset take-out position. We have found that the above problems can be solved by adopting a stack raising step in which the lifters of the above are independently driven to raise the stack, and the present invention has been completed.

The present invention is (1) a mounting table for mounting a stack in which a plurality of tailored blanks, in which end faces of blank pieces having different thicknesses are brought into contact with each other and welded integrally, are stacked so as to have the same orientation. A stack is provided with at least a tailored blank and a plurality of lifters arranged below the pedestal for ascending movement of the stack and a suction means having a plurality of suction portions for sucking the tailored blank. Using a destack device having a thin-walled region in which thin-walled blank pieces of the above are laminated and a thick-walled region in which thick-walled blank pieces of tailored blanks are laminated, from the stack, the top of the stack is used. It is a method of taking out a tailored blank for taking out only the uppermost tailored blank located in, and the upper surfaces of the thin-walled region and the thick-walled region of the stack placed on the mounting table are substantially flush with each other. A stack raising step in which a plurality of lifters are independently driven to raise the stack until the upper end with the thick region reaches a preset take-out position, and a suction means lowers the suction portion to the take-out position. , The suction step of sucking the top tailored blank, the blank raising step in which the suction means raises the suction part and raises only the top tailored blank, and the suction means conveys the top tailored blank to another position. At the same time, the stack has a transport step for separating the suction portion from the uppermost tailored blank, and a pitch raising step for each of the plurality of lifters to independently raise the stack by the thickness of the taken out tailored blank. It is a method of taking out a tailored blank in which a suction step, a blank ascending step, a conveying step, and a pitch ascending step are repeatedly performed after the ascending step is performed.

The present invention resides in (2) the method for taking out a tailored blank according to (1) above, wherein the plurality of lifters are all servo cylinders.

In the present invention, (3) the disstack device further includes a plurality of first detection sensors and a plurality of second detection sensors arranged toward the take-out position, and the first detection sensor and the second detection sensor are on the same surface. In the stack ascending step and the pitch ascending step, the first detection sensor detects the upper end of the thin-walled region that has reached the take-out position, and the second detection sensor detects the upper end of the thick-walled region that has reached the take-out position. The tailored blank removal method according to (1) or (2) above, wherein the plurality of lifters are independently driven to raise the stack.

The present invention is (4) a photoelectric sensor in which the first detection sensor and the second detection sensor emit light rays, and in the suction step, a plurality of suction portions arranged so as to correspond to the plane positions of the light rays are placed at the highest level. The method for taking out the tailored blank according to (3) above, which is adsorbed on the tailored blank.

The present invention exists in the method for taking out a tailored blank according to any one of (1) to (4) above, wherein (5) the suction portion is composed of a suction cup capable of elastic deformation.

In the present invention, (6) the disstack device further includes magnet floaters and air blows provided on both sides of the stack, and in the stack ascending step, magnetic force is applied to the stack by the magnet floaters, and the top tailored by the air blows. The method for taking out a tailored blank according to any one of (1) to (5) above, wherein air is blown between the blank and the tailored blank immediately below the blank.

In the tailored blank taking-out method of the present invention, it is possible to independently drive a plurality of lifters of the disstack device. That is, the amount of movement when raising and lowering can be changed for each lifter. From this, in the method of taking out the tailored blank, in the stack raising step, the plurality of lifters independently raise the thin-walled region (and the thick-walled region), so that the upper surfaces of the thin-walled region and the thick-walled region are substantially surfaced. Can be one.

As a result, the upper end of the thin-walled region is not curved, and the upper surface of the thin-walled region is flush with the upper surface of the thick-walled region. Become. That is, it is possible to prevent the adsorption from becoming insufficient and causing an error such as the adsorbed tailored blank falling during taking out.
Further, in the method of taking out the tailored blank, the plurality of lifters raise the stack until the upper ends of the thick-walled region and the thin-walled region reach the preset take-out positions, so that the stack is sucked in the next suction step. The portion can be easily and surely adsorbed to the uppermost tailored blank.

Therefore, according to the method for taking out the tailored blank, the top-level tailored blank can be surely sucked and taken out by performing the stack ascending step, the suction step, the blank ascending step, the conveying step and the pitch ascending step.
Further, after the stack ascending step is performed, the tailored blank can be continuously and sequentially taken out by repeatedly performing the suction step, the blank ascending step, the conveying step, and the pitch ascending step.
In the method of taking out the tailored blank, the existing suction means can be used, and it is not necessary to attach an extra device such as a spring, so that there is an advantage that it does not take time and effort.

At this time, in the method for taking out the tailored blank of the present invention, it is preferable that all of the plurality of lifters are servo cylinders. In this case, it can be installed even in a relatively narrow space, and accurate position control can be performed only by controlling the rotation speed of the servomotor.

In the tailored blank take-out method of the present invention, when the disstack device further includes a plurality of first detection sensors and a plurality of second detection sensors arranged toward the take-out position, the upper end of the thick region and the thin region. It is possible to detect whether or not the upper end of the has reached the take-out position.
As a result, the next suction step can be performed after confirming that the top tailored blank has reached the take-out position. It is also possible to control the drive of each lifter based on the signals from the first detection sensor and the second detection sensor.

In the method for taking out the tailored blank of the present invention, when the first detection sensor and the second detection sensor are photoelectric sensors that emit light rays, a plurality of suction portions are arranged so as to correspond to the plane positions of the light rays. , It becomes possible to surely adsorb to the top tailored blank. That is, even if there is a protrusion or the like between the light rays that the first detection sensor and the second detection sensor do not detect, an error such as poor adsorption may occur by preventing the suction portion from being adsorbed there. Can be suppressed.

In the method for taking out the tailored blank of the present invention, since a suction cup capable of elastic deformation is adopted as the suction part, there is a degree of freedom as much as it expands and contracts, so that the upper end of the uppermost tailored blank is higher than the take-out position P. Even if it is located below, it can be dealt with. As a result, it is possible to perform the pitch ascending step after taking out the top tailored blanks one by one a plurality of times. That is, since the frequency of performing the pitch raising step can be reduced, the efficiency of taking out the tailored blank can be improved.

In the method for taking out the tailored blank of the present invention, when the disstack device is provided with a magnet floater and an air blow, when the top tailored blank is taken out, the tailored blank directly below the top tailored blank is in close contact with the top tailored blank. It is possible to suppress the occurrence of a so-called double blank, which is taken out as a result.

FIG. 1A is a schematic side view showing a tailored blank taken out by the tailored blank taking-out method according to the present embodiment, and FIG. 1B shows a stack in which a plurality of tailored blanks are stacked. It is a schematic side view. FIG. 2 is a schematic side view showing the entire disstack device used in the method for taking out the tailored blank according to the present embodiment. FIG. 3 is a flowchart showing a method of taking out the tailored blank according to the present embodiment. FIG. 4 is a schematic side view for explaining the stack ascending step of the tailored blank taking-out method according to the present embodiment. FIG. 5 is a schematic side view for explaining a suction step of the tailored blank taking-out method according to the present embodiment. FIG. 6 is a schematic side view for explaining a blank raising step of the tailored blank taking-out method according to the present embodiment. 7 (a) and 7 (b) are schematic side views showing a tailored blank taken out by the tailored blank taking-out method according to another embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary. In the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted. In addition, the positional relationship such as up, down, left, and right shall be based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the ratios shown.

The method for taking out a tailored blank according to the present embodiment is a method for taking out a tailored blank located at the top of the stack (hereinafter, also referred to as "top tailored blank") from a stack in which a plurality of tailored blanks are stacked.
FIG. 1A is a schematic side view showing a tailored blank taken out by the tailored blank taking-out method according to the present embodiment, and FIG. 1B shows a stack in which a plurality of tailored blanks are stacked. It is a schematic side view.
As shown in FIG. 1A, in the tailored blank taking-out method according to the present embodiment, the tailored blank X is formed by connecting the end faces of blank pieces having different thicknesses. Specifically, the end faces of the thin blank piece X1 and the thick blank piece X2 are brought into contact with each other so that the lower surfaces are flush with each other, and welded integrally. Incidentally, since the tailored blank is generally an outer surface on which one side surface is exposed, the tailored blank is welded so that the entire surface on one side is flush with each other.
The material of the thin blank piece X1 and the thick blank piece X2 is not particularly limited, and examples thereof include a cold-rolled steel plate and a hot-dip galvanized steel plate. The materials of the thin blank piece X1 and the thick blank piece X2 may be the same or different.

As shown in FIG. 1B, in the method for taking out tailored blanks according to the present embodiment, a plurality of tailored blanks X are stacked so as to have the same orientation to form a stack S. That is, in the stack S, the thin-walled region S1 in which the thin-walled blank pieces X1 of the tailored blank X are laminated so as to overlap each other and the thick-walled region S1 in which the thick-walled blank pieces X2 of the tailored blank X are laminated so as to overlap each other are laminated. It has a region S2.
In this way, the thin blank piece X1 and the thick blank piece X2 are connected, and the thicknesses of the two are different. Therefore, in the stack S, the upper end of the thick region S2 is substantially horizontal. The upper end of the thin-walled region S1 has a shape curved outward from the connected portion. In addition, a gap (not shown) is generated in this curved portion.

FIG. 2 is a schematic side view showing the entire disstack device used in the method for taking out the tailored blank according to the present embodiment.
As shown in FIG. 2, the disstack device D is arranged below the mounting table 1 for mounting the stack S on which a plurality of tailored blanks X are stacked, and the stack S is moved up. A plurality of lifters 2 for causing the stack, a suction means 3 having a plurality of suction portions 31, a first detection sensor 41 and a second detection sensor 42 arranged toward the take-out position P, and a stack S provided on both sides of the stack S, respectively. The magnet floater 5 and the air blow 6 are provided.

In the disstack device D, the mounting table 1 has a plate shape, and a plurality of through holes 11 penetrating in the vertical direction are arranged vertically and horizontally on the surface in the vertical direction of the paper surface referred to in FIG.
Then, below each through hole 11, a lifter 2 is arranged at a position corresponding to the through hole 11.
Therefore, the stack S can be mounted on the upper surface of the mounting table 1, and the lifter 2 arranged below by the through hole 11 is not hindered from moving up and down.

As described above, a plurality of lifters 2 are arranged vertically and horizontally so as to correspond to the positions of the through holes, and the upper ends thereof can pass through the through holes and come into contact with the lower surface of the stack S.
Here, it is preferable to use, for example, a servo cylinder as each lifter 2. The servo cylinder converts the rotation of the servo motor into a linear mechanism of a ball screw, thereby raising and lowering the cylinder.

Therefore, in this case, each lifter 2 can accurately control the position of the cylinder by independently controlling the rotation speed of the servomotor. That is, the amount of movement when raising and lowering can be changed for each lifter 2.
For example, the lifter 2 arranged below the thin-walled region S1 greatly raises the thin-walled region S1 to a predetermined take-out position P, while the lifter 2 arranged below the thick-walled region S2 is a thick-walled region. S2 can be raised to a predetermined take-out position less.
Further, since the servo cylinder has a simple structure, it has an advantage that it can be installed even in a relatively narrow space.
The lifter 2 may be provided with a load cell or the like capable of detecting a load.

On the other hand, the suction means 3 has at least a plurality of arm portions 32 and suction portions 31 provided at the tips of the arm portions 32, respectively.
In the suction means 3, the suction unit 31 can suck the uppermost tailored blank X, and the arm part 32 moves up and down together with the suction part 31.
At this time, the suction portions 31 are located at the same height, and all the arm portions 32 move up and down in synchronization with each other.
Further, it is preferable that each arm portion 32 is fixed to the frame F and integrated. In this case, by moving the frame itself up and down, all the arm portions 32 can be moved up and down at the same time. As a result, the time required for moving the arm portion up and down can be shortened as much as possible, so that the efficiency of taking out is improved.
Here, the suction portion 31 is made of a suction cup that can be elastically deformed, and the inside thereof can be sucked to create a negative pressure. That is, by bringing the suction portion 31 into contact with the uppermost tailored blank X and creating a negative pressure inside the suction portion 31, the uppermost tailored blank X is attracted to the suction portion 31.
By adopting a suction cup that can be elastically deformed as the suction part 31, there is a degree of freedom as much as it expands and contracts, so that the upper end of the top tailored blank is located slightly below the take-out position P. Can also be handled.

The take-out position P can be arbitrarily set, is a position where the upper end of the uppermost tailored blank X is reached, and is a position where the suction unit 31 sucks and grips the blank. The take-out position P can be set by a control unit (not shown).
Further, the take-out position P is preferably a horizontal plane. In this case, a plurality of suction portions lowered by the arm portion 30 are simultaneously brought into contact with the uppermost tailored blank X, simultaneously sucked and gripped, and simultaneously taken out. Therefore, it is necessary for the suction portion 31 to move up and down. Time can be reduced as much as possible.
As described above, since the suction portion 31 has a degree of freedom for expansion and contraction, even if the highest tailored blank X is taken out, the highest tailored blank X to be taken out next at the take-out position P Can be adsorbed and held.

The plurality of first detection sensors 41 and the plurality of second detection sensors 42 are installed toward preset extraction positions P.
The first detection sensor 41 detects the upper end of the thin-walled region S1 that has reached the take-out position P, and the second detection sensor 42 detects the upper end of the thick-walled region S2 that has reached the take-out position P. ..
As a result, in the disstack device D, it is possible to recognize whether or not the upper end of the thick region S2 and the upper end of the thin region S1 have reached the take-out position P.
Further, after confirming that the top tailored blank X has reached the take-out position, the suction step described later can be performed.
Further, the control unit (not shown) can control the drive of each lifter 2 based on the signals from the first detection sensor 41 and the second detection sensor 42.

The plurality of first detection sensors 41 and the plurality of second detection sensors 42 are all photoelectric sensors that emit light rays.
The first detection sensor 41 is provided on both sides of the thin-walled region S1 (both sides of the thin-walled region S1 in the direction perpendicular to the paper surface in FIG. 2), and the second detection sensor 42 is similarly located on the thick-walled region S2. It is provided on both sides.
At this time, it is preferable that all the first detection sensor 41 and the second detection sensor 42 are arranged on the same surface. When the take-out position P is on a predetermined horizontal plane, it is preferable that the first detection sensor 41 and the second detection sensor 42 are also arranged on the same horizontal plane. In this case, it can be confirmed that the upper surface of the top tailored blank X is a horizontal plane. That is, it is possible to detect in advance an error such as a part of the top tailored blank X being tilted.

Here, the plurality of suction portions 31 described above are arranged (horizontally) so as to correspond to the plurality of first detection sensors 41 and the plurality of second detection sensors 42, and further, the first detection sensor 41 and the second detection are further generated. They are arranged (vertically) so as to correspond to the plane position of the light beam emitted from the sensor 42. That is, a plurality of suction portions 31 are arranged above the locus of light rays so as to be parallel to the locus of light rays. Then, when the arranged suction portions 31 are lowered, these suction portions 31 will suck the top tailored blank X at the position where the light beam is on the plane.
As a result, the disstack device D can be reliably adsorbed to the uppermost tailored blank X. That is, even if there is a protrusion or the like between the light rays that the first detection sensor 41 and the second detection sensor 42 do not detect, by preventing the suction portion 31 from being sucked there, an error such as poor suction or the like occurs. Can be suppressed.

The magnet floaters 5 are arranged on both sides of the stack S.
The magnet floater 5 is provided with an electromagnet on the stack S side, and has a function of applying a magnetic force to the stack S by bringing it closer to the stack S. A permanent magnet may be used instead of the electromagnet.
When the tailored blank X is a magnetic material, the magnet floater 5 applies the same magnetic force to each tailored blank X of the stack S. Then, since the laminated tailored blanks X repel each other, when the uppermost tailored blank X is taken out, it can be easily peeled off from the tailored blank X immediately below the tailored blank X. That is, it is possible to prevent the so-called double blank from occurring.
If the tailored blank X is not a magnetic material, the magnet floater 5 is not required.

The air blows 6 are arranged on both sides of the stack S.
The air blow 6 has a function of blowing air.
For example, when the suction unit 31 sucks and takes out the uppermost tailored blank X, air is blown between the uppermost tailored blank X and the tailored blank X immediately below the uppermost tailored blank X to obtain the uppermost tailored blank X. , It can be easily peeled off from the tailored blank X immediately below it. That is, it is possible to prevent so-called double blanks from occurring.

The method for taking out the tailored blank X according to the present embodiment is performed by using the disstack device D described above.
FIG. 3 is a flowchart showing a method of taking out the tailored blank according to the present embodiment.
As shown in FIG. 3, in the method of taking out the tailored blank X according to the present embodiment, the stack raising step 51 for raising the stack S mounted on the mounting table 1 and the suction means 3 raise the suction portion 31 to the highest position. The suction step 52 for adsorbing to the tailored blank X, the blank ascending step 53 in which the suction means 3 raises the suction unit 31 and raises only the top tailored blank X, and the suction means 3 separates the top tailored blank X. It has a transport step 54 for transporting to the position of, and a pitch raising step 55 for raising the stack by the thickness of the tailored blank taken out.

In the method of taking out the tailored blank X, the top-level tailored blank X can be reliably sucked and taken out by performing the stack ascending step 51, the suction step 52, the blank ascending step 53, the transport step 54 and the pitch ascending step 55. it can.
Further, after the stack ascending step 51 is performed, the tailored blank X can be continuously taken out by repeating the suction step 52, the blank ascending step 53, the conveying step 54, and the pitch ascending step 55.

In the stack ascending step 51, the upper surfaces of the thin-walled region S1 and the thick-walled region S2 of the stack S mounted on the mounting table 1 are substantially flush with each other, and the upper ends thereof reach a preset take-out position P. Up to this step, the stack S is raised by driving the plurality of lifters 2 independently.
First, in the stack ascending step 51, the stack S is already mounted on the mounting table 1.
Such a mounting method is not particularly limited, and for example, tailored blanks X manufactured by integrally welding the end faces of a thin blank piece X1 and a thick blank piece X2 are sequentially placed on the mounting table 1. By stacking the stacks S, the stack S may be placed on the mounting table 1.

FIG. 4 is a schematic end view for explaining the stack ascending step of the tailored blank taking-out method according to the present embodiment. In FIG. 4, the description of the suction means 3, the magnet floater 5, and the air blow 6 is omitted.
As shown in FIG. 4, in the stack raising step 51, the plurality of lifters 2 raise the stack S from the state in which the stack S is placed on the mounting table 1.
At this time, as described above, since the plurality of lifters 2 of the disstack device D can be driven independently, the lifter 2 below the thin-walled region S1 has a first upper end of the thin-walled region S1. The thin-walled region S1 is raised until it is detected by the detection sensor 41, and the lifter 2 below the thick-walled region S2 has the thick-walled region S2 until the upper end of the thick-walled region S2 is detected by the second detection sensor 42. To raise. That is, based on the detection signal of the first detection sensor 41 or the second detection sensor 42, the control unit (not shown) stops the drive of each lifter 2 independently.
Then, the upper surfaces of the thin-walled region S1 and the thick-walled region S2 are substantially flush with each other, and the upper ends thereof are located at the take-out position P.

FIG. 5 is a schematic end view for explaining the suction step of the tailored blank taking-out method according to the present embodiment. In FIG. 5, the detection sensors 41 and 42, the magnet floater 5 and the air blow 6 are not described.
As shown in FIG. 5, the suction step 52 is a step in which the suction means 3 lowers the suction portion 31 to the take-out position P and sucks the suction portion 31 on the uppermost tailored blank X.
In the stack raising step 51, the upper surface of the thin-walled region S1 is not curved and is flush with the upper surface of the thick-walled region S2. Therefore, in the suction step 52, the suction portion 31 of the suction means 3 is surely It becomes possible to adsorb the uppermost tailored blank X. That is, it is possible to prevent the adsorption from becoming insufficient and causing an error such as the adsorbed tailored blank X falling during taking out.
Further, since the upper surfaces of the thin-walled region S1 and the thick-walled region S2 are substantially flush with each other, the suction portions 31 are arranged at the same height as described above, and all the arm portions 32 are synchronized and constant. It can be moved down a distance. As a result, in the method of taking out the tailored blank, the time required for the suction portion 31 to descend can be shortened as much as possible, so that the take-out speed of the tailored blank X is improved. By the way, if the descending movement distance of each suction unit 31 is different, it is necessary to match the adsorption timing with the descending movement of the suction unit 31, which takes the longest time.

Further, as described above, the plurality of suction portions 31 are arranged so as to correspond to the plane positions of the light rays emitted by the first detection sensor 41 and the second detection sensor 42, so that the uppermost tailored blank X is used. It is possible to reliably adsorb. That is, even if there is a protrusion or the like between the light rays that the first detection sensor 41 and the second detection sensor 42 do not detect, by preventing the suction portion 31 from being sucked there, an error such as poor suction or the like occurs. Can be suppressed.

FIG. 6 is a schematic end view for explaining a blank raising step of the tailored blank taking-out method according to the present embodiment. In FIG. 6, the description of the detection sensors 41 and 42 is omitted.
As shown in FIG. 6, the blank raising step 53 is a step in which the suction means 3 raises the suction portion 31 and raises only the uppermost tailored blank X.
In the blank ascending step 53, the suction portion 31 can ascend and move all the arm portions 32 in synchronization in the same manner as described above.
As a result, in the method of taking out the tailored blank, the time required for the suction portion 31 to rise can be shortened as much as possible, so that the take-out speed of the tailored blank X is improved.

In the blank raising step 53, when the suction unit 31 raises the top tailored blank X, the magnet floater 5 and the air blow 6 are driven. As a result, the top-level tailored blank X can be easily peeled off from the tailored blank X immediately below it, and so-called double blanks can be prevented from occurring.
At this time, since the magnet floaters 5 are arranged on both sides of the stack S, they also play a role of guiding upward so as not to shake in the lateral direction when raising the blank.

The transport step 54 is a step in which the suction means 3 transports the top-level tailored blank X to another position and separates the suction unit 31 from the top-level tailored blank X.
In the transport step 54, the top-level tailored blank X taken out is transported upward or laterally by the suction means 3 and passed to another transport device.
For example, when the suction means 3 conveys the uppermost tailored blank X upward, the suction means 3 magnetically attaches the uppermost tailored blank X to the lower surface of a magnetic conveyor (not shown) arranged above the stack S. The top-level tailored blank is conveyed by the magnetic conveyor.
Further, the suction means 3 itself may be conveyed in the lateral direction by a conveyor, a robot, or the like, and the uppermost tailored blank X may be separated from the suction portion 31 at a desired position.

The pitch raising step 55 is a step in which the plurality of lifters 2 independently raise the stack S by the thickness of the tailored blank X taken out.
When the first detection sensor 41 and the second detection sensor 42 detect that the top tailored blank X has been taken out in the blank ascending step 53, the control unit (not shown) raises the top based on the detection signal. Each lifter 2 is driven independently by the thickness of the tailored blank X.
Then, the upper ends of the thin-walled region S1 and the thick-walled region S2 reach the take-out position P again.

At this time, the stack S in the pitch raising step 55 may be raised every time one tailored blank X is taken out, and since the suction portion 31 has a degree of freedom of expansion and contraction, each time the stack S is taken out a plurality of times. You may go to.
For example, when the stack S is raised after taking out the top tailored blank X one by one a plurality of times, the frequency of performing the pitch raising step 55 can be reduced, so that the efficiency of taking out the tailored blank X can be improved.

In the tailored blank extraction method according to the present embodiment, the above-mentioned control unit usually includes at least a central processing unit (CPU), an arithmetic processing unit, a storage unit, an image processing unit, an input / output unit (keyboard, display), and the like. Computer.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments.

In the method for taking out the tailored blank according to the present embodiment, the tailored blank X is integrally formed by bringing the end faces of the thin blank piece X1 and the thick blank piece X2 into contact with each other so that the lower surfaces are flush with each other. However, the method is not limited to this as long as the end faces of blank pieces having different thicknesses are connected to each other.
For example, as shown in FIG. 7A, the tailored blank XA may be one in which thin blank pieces X1 are integrally welded to both sides of the thick blank piece X2.
Further, as shown in FIG. 7B, the tailored blank XB may be one in which thick blank pieces X2 are integrally welded to both sides of the thin blank piece X1.

In the method for taking out the tailored blank according to the present embodiment, the mounting table 1 of the disstack device D has a plate shape, and a plurality of through holes penetrating in the vertical direction are arranged vertically and horizontally, but the lifter 2 can pass through. If there is a gap, it is not limited to this.
For example, the mounting table may be an aggregate of a plurality of strips, or may be a grid.

In the method for taking out the tailored blank according to the present embodiment, the suction portion 31 of the suction means 3 is composed of a suction cup capable of elastic deformation, and the inside thereof can be sucked to create a negative pressure. , If the tailored blank X can be adsorbed, the present invention is not limited to this.
For example, when the tailored blank X has magnetism, the suction portion 31 may be a magnet.

In the method of taking out the tailored blank according to the present embodiment, each arm portion 32 is fixed to the frame F and integrated, but each arm portion 32 can move up and down independently regardless of the presence or absence of the frame F. May be good.

In the method for taking out the tailored blank according to the present embodiment, the plurality of first detection sensors 41 and the plurality of second detection sensors 42 are all photoelectric sensors, but the present invention is not limited thereto.
For example, it may be a proximity sensor, an ultrasonic sensor, an image processing camera, or the like.

In the tailored blank taking-out method according to the present embodiment, the disstack device D includes the magnet floater 5 and the air blow 6, but is not essential.

The method for taking out tailored blanks according to the present invention can be used in the field of metal processing such as press working as a method for taking out tailored blanks one by one from a stack in which tailored blanks are laminated. According to the method for taking out a tailored blank according to the present invention, an existing suction means can be used, and the uppermost tailored blank can be reliably sucked and taken out.

1 ... Mounting stand 11 ... Through hole 2 ... Lifter 3 ... Suction means 31 ... Suction part 32 ... Arm part 41 ... 1st detection sensor 42 ... 2nd detection Sensor 5 ・ ・ ・ Magnet floater 51 ・ ・ ・ Stack ascending step 52 ・ ・ ・ Adsorption step 53 ・ ・ ・ Blank ascending step 54 ・ ・ ・ Conveying step 55 ・ ・ ・ Pitch ascending step 6 ・ ・ ・ Air blow D ・ ・ ・Disstack device F ... Frame P ... Take-out position S ... Stack S1 ... Thin area S2 ... Thick area X ... Tailored blank (top tailored blank)
X1 ・ ・ ・ Thin-walled blank piece X2 ・ ・ ・ Thick-walled blank piece

Claims (6)

A mounting table for mounting stacks in which multiple tailored blanks, in which end faces of blank pieces having different thicknesses are brought into contact with each other and welded integrally, are stacked so as to have the same orientation, and a mounting table below the mounting table. A plurality of lifters for ascending the stack and a suction means having a plurality of suction portions for sucking the tailored blank are provided, and the stack is at least made of a thin wall of the tailored blank. Using a destack device having a thin-walled region in which blank pieces are laminated and a thick-walled region in which thick blank pieces of the tailored blank are laminated, from the stack to the top of the stack. It is a method of taking out a tailored blank for taking out only the top-level tailored blank that is located.
The upper surfaces of the thin-walled region and the thick-walled region of the stack placed on the above-mentioned stand are substantially flush with each other, and the upper ends of the thin-walled region and the thick-walled region reach a preset take-out position. Until this is done, the stack ascending step of driving the plurality of lifters independently to elevate the stack, and
A suction step in which the suction means lowers the suction portion to the take-out position and sucks the suction portion on the top tailored blank.
A blank raising step in which the suction means raises the suction portion and raises only the top tailored blank.
A transfer step in which the suction means conveys the top-level tailored blank to another position and separates the suction portion from the top-level tailored blank.
A pitch raising step in which the plurality of lifters independently raise the stack by the thickness of the tailored blank taken out, and
Have,
A method for taking out a tailored blank in which the suction step, the blank ascending step, the conveying step, and the pitch ascending step are repeatedly performed after the stack ascending step is performed. The method for taking out a tailored blank according to claim 1, wherein the plurality of lifters are all servo cylinders. The disstack device further comprises a plurality of first detection sensors and a plurality of second detection sensors arranged towards the take-out position.
The first detection sensor and the second detection sensor are arranged on the same surface.
In the stack ascending step and the pitch ascending step, the first detection sensor detects the upper end of the thin-walled region that has reached the take-out position, and the second detection sensor of the thick-walled region that has reached the take-out position. The method for removing a tailored blank according to claim 1 or 2, wherein the plurality of lifters are independently driven to raise the stack until the upper end is detected. The first detection sensor and the second detection sensor are photoelectric sensors that emit light rays.
The method for taking out a tailored blank according to claim 3, wherein in the adsorption step, the plurality of adsorption portions arranged so as to correspond to the plane positions of the light rays are adsorbed on the uppermost tailored blank. The method for taking out a tailored blank according to any one of claims 1 to 4, wherein the suction portion comprises a suction cup capable of elastic deformation. The disstack device further comprises magnet floaters and air blows provided on both sides of the stack, respectively.
Any of claims 1 to 5 in which a magnetic force is applied to the stack by the magnet floater in the stack ascending step, and air is blown between the uppermost tailored blank and the tailored blank immediately below the uppermost tailored blank by the air blow. The method for taking out the tailored blank according to item 1.

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