JPH09314365A - Working line of plate and manufacture of blank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with expensive dies and press for punching by welding square cut plates of different thickness to each other to form a blank for pressing. SOLUTION: In a first cutting stage SG2, a plate is cut to the prescribed length to form cut plates 4A, 4B, 4C, in a side-shifting stage SG3, the cut plates 4A, 4B, 4C are shifted, and in a welding stage SG4, the cut plate 4A, the cut plate 4B, and the cut plate 4C are welded to each other to form a wide plate 5, and in a second cutting stage SG5, an integrated blank 6 to be pressed is cut.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for manufacturing an aggregate blank material obtained by joining plate materials having different plate thicknesses.

[0002]

2. Description of the Related Art The body of an automobile is manufactured by pressing a metal plate. On the other hand, it is necessary to change the plate thickness and material of each part of the vehicle body from the requirements of vehicle body rigidity, durability, energy absorption performance and the like. Since the number and types of metal plates will increase as they are, a method has been proposed in which elements (small parts) corresponding to the shape of each part are punched out from a flat plate, these elements are integrated by welding, and then pressed. There is.

Techniques of this kind include, for example, Japanese Patent Publication No. 44-2.
No. 4763, "Method for manufacturing automobile body part", Japanese Patent Publication No. 45-20372, "Die-molded sheet metal structure and manufacturing method thereof", Japanese Utility Model Laid-Open No. 58-111120.
Publication "Blank for press molding", Japanese Utility Model Laid-Open No. 59-182
No. 424, "Door Inner Panel Structure", JP-A-59-
JP-A-220229, "Method for manufacturing pressed product" and JP-A-63-168286, "Method for manufacturing molded member" are known.

The technique disclosed in Japanese Patent Publication No. 44-24763 is disclosed in FIG.
A to 1E are manufactured, and the small parts 1A to 1 in FIG. 2 are manufactured.
E is integrated by the welding machine 5 and press-molded by the squeezing machine 9 shown in FIG. The same applies to other conventional techniques.

[0005]

The small parts 1A to 1E described above are to be solved.
For punching, a die for punching and a dedicated press machine are required. This mold and the dedicated press are extremely expensive. It is easy to recover the die cost and the press machine equipment cost in the case of mass production, but the product cost rises in the case of small volume production. Then, the objective of this invention is providing the manufacturing technology of the blank material which does not require a die for punching and a press machine for punching.

[0006]

In order to achieve the above object, the first aspect of the present invention is to provide a material supplying means for supplying at least two strips, and a first cutting means for cutting the strip into a predetermined length. A plate material processing line provided with a width-shifting means for relatively moving the cut-off cut plates relative to each other to bring the side surfaces into contact with each other, and a welding means for welding the contact portions of the cut-off cut plates. Is.

Cut out a plurality of cutting plates from a plurality of strips,
After the widths of these are aligned, the abutting portion is welded to manufacture a wide plate for press forming. Conventionally, a wide plate for press forming was manufactured with a punching die and a punching press machine, but in the present invention, the punching die and the punching press machine are unnecessary, so that the equipment cost can be suppressed. it can. Further, since the width of the wide plate can be changed only by changing the number of strips, the work to be handled becomes abundant and the versatility is enhanced, which is especially suitable for small-quantity multi-production.

According to a second aspect of the present invention, there is provided a material supplying means for supplying at least two strips and a first strip for cutting the strip into a predetermined length.
A cutting means, a width-shifting means for relatively width-cutting the cut plates relative to each other to bring the side surfaces into contact with each other, a welding means for welding the abutting portions of the width-cut cut plates, and the obtained wide width It is a plate material processing line provided with a second cutting means for cutting out a press blank blank having a desired shape from a plate.

Cut out a plurality of cutting plates from a plurality of strips,
After the widths of these are brought close to each other, the contact portion is welded and then cut into a desired shape to manufacture a press blank material.
Conventionally, a blank for press for press forming was manufactured with a punching die and a punching press machine, but in the present invention, the punching die and the punching press machine are not required, so the equipment cost is suppressed. be able to. Further, since the width of the wide plate can be changed only by changing the number of strips of the strip plate, the work to be handled becomes abundant and the versatility is enhanced, and it is particularly suitable for small-quantity multi-production.

A third aspect of the present invention is a method for manufacturing a blank material, characterized in that rectangular cut plates having different plate thicknesses are integrated by welding. Conventionally, a punching die and a punching press are used to punch-manufacture small parts and weld these small parts into a blank for press. On the other hand, in the present invention, rectangular cut plates having different plate thicknesses are integrated by welding to form a press blank material. Therefore, according to the present invention, an expensive punching die and punching press machine are not required, and the equipment cost can be suppressed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a plan view of a processing line according to the present invention. The processing line 1 includes three coils 2A, 2B, 2C.
(B indicates a center row and A and C indicate side rows. The same applies to the following.) The material supply means 10 for rewinding and supplying the strips 3A, 3B and 3C and the strips 3A, 3B and 3C are predetermined. The first cutting means 20 for cutting to the length of, the width-adjusting means 30 for relatively moving the cut plates 4A, 4B, 4C after cutting and bringing the side surfaces into contact with each other, Welding means 70 for welding the abutting portions of the cut plates 4A, 4B, 4C to be integrated with each other, and second cutting means 80 for cutting the press blank blank 6 having a desired shape from the obtained wide plate 5. And are arranged in this order. In the figure, 11 is an uncoiler,
12 is a washing machine, 13 is a leveler, 14 is a loop pit, and 15 is a feeder. Reference numerals 71 and 71 denote side guide rolls, which are a pair of rolls that sandwich the cut plate after the width adjustment so as not to separate the cut plates.

FIG. 2 is a side view of FIG. 1, and the operation of the main equipment and the like will be described for column C. The same applies to columns A and B. The uncoiler 11 is a device that has a claw 11a and rewinds the strip 3C from the coil 2C in the same manner as a peeler.
The cleaning machine 12 sprays a cleaning liquid on the upper and lower surfaces of the strip 3C,
Alternatively, it is a device for dipping and removing rolling oil and the like. The leveler 13 is a device that passes the strip plate 3C between a plurality of rolls to eliminate the winding tendency of the strip plate and flatten it.

The loop pit 14 is a kind of buffer (buffer zone). In the next first cutting means 20, the traveling of the strip 3C is stopped only at the time of cutting. That is, the cycle of supply → stop → disconnect → delivery is repeated. On the other hand, in the material supplying means 10 on the upstream side, the strip plate 3C is continuously rewound in view of work efficiency. By sufficiently sagging the strip 3C at the loop pitch 14 and making the amount of sag variable, it is possible to connect the material supplying means 10 for continuous operation and the first cutting means 20 for intermittent operation.

The feeder 15 is a device for supplying the strip 3C to the first cutting means 20. The first cutting means 20 is a head / tail cutting machine called a crop shear, and a cutter 21 called a guillotine cutter arranged in the line cross direction.
Is a mechanical cutting machine that moves up and down. Although there is a gas cutting machine as a cutting machine, since the cutting time is long, the first cutting means 20 employs a mechanical cutting machine having a short cutting time. The width adjusting means 30 will be described later.

A carbon dioxide laser welding machine is suitable for the welding means 70, and a stand frame 72 and sliders 73, 73 mounted on the stand frame 72 so as to be horizontally reciprocally movable in the direction opposite to the front and rear of the drawing (the slider 73 at the back is not shown). )When,
Welding torches 74 and 74 (welding torches 74 at the back are not shown) attached downward to these sliders 73 and 73. The welding torches 74 and 74 are moved in the line cross direction to contact the cutting plates with each other. Welding torch 7 facing the contact area
Weld with laser beams from 4,74.

The second cutting means 80 is preferably a carbon dioxide gas laser fusing machine. The laser fusing machine has the same principle as the laser welding machine, but has a large heat input per unit area. Second
The cutting means 80 includes a stand frame 82 and sliders 83 ... Attached to the stand frame 82 so as to be horizontally reciprocally movable in the front-back direction of the figure (... indicates a plurality. The same applies hereinafter).
And a cutting torch 84 attached downward to these sliders 83, the cutting torch 84 is movable in the front and back direction of the drawing, and the work is movable to the left and right in the drawing by the operation of the table. . Therefore, the cutting torch 84 ...
Can be two-dimensionally moved in the X-Y direction of the work relatively, and a desired shape can be cut out. Of course,
The cutting torch 84 ... May be moved two-dimensionally with the work stationary.

FIG. 3 is a plan view of the width adjusting means according to the present invention and is a partially enlarged view of FIG. The width-shifting means 30 accommodates three conveyors 32A, 32B, 32C in a machine frame 31, arranges stoppers 33 ... on the exit sides of these conveyors 32A, 32B, 32C, and the conveyor 32.
The plate edge detection means 34 shown by an imaginary line between the inlet of A and the inlet of the conveyor 32B, the plate edge detection means 35 between the outlet of the conveyor 32A and the outlet of the conveyor 32B, and the inlet of the conveyor 32B and the conveyor 32C. Plate edge detection means 36 between the entrance and the exit of the conveyor 32B and the conveyor 3
The plate edge detecting means 37 is arranged between the outlet of 2C.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, in which the conveyor 32B has a single feed screw 41 extending from the machine frame 31.
B is mounted on a slider 43B slidably supported by B and two guide rods 42B, 42B via a turning motor 44B, and a pair of brackets 46, 46 is mounted on the table frame 45B. Drive pulley 47 and idler pulley 48 that are rotatably attached, a conveyor belt 49B wound around these pulleys 47, 48, and a transmission member (sprocket 51, 52, chain 53) for driving the drive pulley 47. ) And the conveyor drive motor 54 and the pulleys 47, 48
Of the electromagnet rail 55B provided very close to the lower surface of the conveyor belt 49B above the center of the table, and the free rolls 56 attached to the table frame 45B. These free rolls 56 ... Are top members that are substantially the same as the upper surface of the conveyor belt 49B, and are members that receive the work so that the conveyor belt 49B does not sink significantly.

The conveyor belt 49B is a general-purpose non-metal belt made of urethane rubber containing wire beat, and when the electromagnet rail 55B is energized, the magnetic force lines penetrate the conveyor belt 49B. When a magnetically attracting metal plate such as a carbon steel plate is placed on the conveyor belt 49B, the work is magnetically attached to the conveyor belt 49B. The operation does not change during the driving of the conveyor belt 49B. Therefore, the work can be accurately conveyed without rising or slipping.

The turning motor 44B is, for example, a case 44d.
The rotor 44e is rotatably housed therein, and the rotor 44e is rotated by supplying electricity, air pressure or hydraulic pressure.

The stopper 33 includes, for example, an S-shaped guide groove 5 in a support 58 extending from the table frame 45B.
It is attached via 9, 59, and can be retracted to the standby position by the pulling action of the cylinder unit 61 attached to the table frame 45B side. At this time, since the stopper 33 descends along the S-shaped guide grooves 59, 59 while separating from the work, there is no concern that the stopper 33 pushes the work and shifts the position of the work.

Since the other conveyors 32A and 32C are the same means as the above conveyor 32B, the detailed description will be omitted by replacing the suffix B of the reference numeral with A or C.

The plate edge detecting means 34 on the right side of the drawing is formed by arranging light emitting / receiving devices or solid-state image pickup devices (CCD) 34b ... on a straight line in a slender casing 34a extending in the front-back direction of the drawing. . The element optically recognizes whether or not there is an object, and outputs an on / off signal or a 0, 1 signal. Therefore, the edge of the plate can be accurately detected by searching for the inversion position of the signal. The plate edge detection means 34
May be attached to the support pipe 34c horizontally passed in the air via the clamper 34d. This is because the screw 34e can be loosened to move freely in the axial direction of the support pipe 34c. Since the other plate edge detecting means 35 to 37 have the same structure, the description thereof will be omitted.

FIG. 5 is a sectional view taken along line 5-5 of FIG. For example, the feed screw 41C of the conveyor 32C on the left side is normally and reversely rotated by the feed motor 63C attached to the machine frame 31. 6
4C is a support block that receives the tip of the feed screw 41C. By operating the feed motor 63C, the slider 43C can be moved in the line cross direction as indicated by the arrow. The table motor 45C can be swung by the action of the turning motor 44C as shown by the arrow. That is, the conveyor 32C is characterized by being capable of lateral movement and turning. The same applies to the other conveyors 32A and 32B, and the detailed description is omitted by exchanging the suffix from C to A or B.

The operation of the processing line 1 and the width-shifting means 30 having the above construction will be described below. FIG. 6 is an operation explanatory view of the processing line according to the present invention. Material supply stage SG
1, coils 2A, 2B, 2 having different plate thicknesses from each other
C is rewound to form strips 3A, 3B, 3C. In the first cutting stage SG2, these are cut into predetermined lengths to form cutting plates 4A, 4B, 4C. In the width-shifting stage SG3, the cut plates 4A, 4B, and 4C are moved close to each other by the width-shifting action of the width-shifting means 30 described in detail below. Reference numerals 7 and 7 are contact portions.

At the welding stage SG4, the cutting plates 4A, 4B and 4C are welded to form the wide plate 5. 8,
8 is a bead. In the second cutting stage SG5,
The collective blank 6 for press is cut out.

In the past, small parts were punched and manufactured using a punching die and a punching press, and these small parts were welded to obtain a blank for pressing. On the other hand, in the present embodiment, the rectangular cut plates 4A having different plate thicknesses,
4B and 4C are integrally welded to each other to form a press blank material 6. Therefore, in the present embodiment, an expensive punching die and punching press machine are not required, and the equipment cost can be suppressed.

FIGS. 7 (a) to 7 (c) are explanatory views of the operation of the width adjusting means according to the present invention, and FIG. 8 is an operation flow chart of the width adjusting means. The operation will be described with reference to both figures. FIG. 7 (a)
At the stopper 33 ...
The tip ends of 4B and 4C are applied and the cut plates 4A, 4B and 4C are stopped. In this state, the cut plates 4A, 4B, 4C are not necessarily parallel. The inner corner (point) of the cutting plate 4A is a1,
a2, the four corners (points) of the central cutting plate 4B are b1 and b
2, b3, b4, the corner (point) inside the cutting plate 4C is c
1 and c2.

In FIG. 8, the step number is described as STXX. The line (a1-a2) indicates the line passing through the points a1 and a2, and the distance (a1-b1) indicates the distance between the points a1 and b1. The same applies to other alphabets and subscripts. ST01: Corner a at plate edge detection means 34 to 37
The positions of 1, a2, b1 to b4 and c1, c2 are detected. ST02: Calculate the inclination θb of the line (b1-b2) with respect to the line center line. ST03: Check whether or not the inclination θb is within a reference value. ST04: If the inclination θb is large, the central cutting plate 4
Turn B to correct.

ST05: If the inclination θb is within the reference value, then the line (a1--) to the line (b1-b2) is obtained.
The inclination θa of a2) is calculated. ST06: The cutting plate 4A is swiveled by the inclination θa for correction.
Now, for line (b1-b2), line (a1-a2)
Become parallel. ST07: Next, the mutually parallel lines (b1-b2)
And the line (a1-a2). Specifically, the distance (a1-b1) is calculated. The distance (a2
-B2) does not matter. ST08: The distance (a1-b1) or the distance (a2-)
Only b2), the cutting plate 4A is moved to the center of the line.

The above ST05 to ST09 and the following ST09 to
12 will be advanced at the same time. ST09: Line (c1-c2) with respect to line (b3-b4)
The inclination θc of is calculated. ST10: The conveyor 4C is swung by an angle of inclination θc for correction. Now, for the line (b3-b4), the line (c1-c
2) becomes parallel. ST11: Next, the lines parallel to each other (b3-b4)
And the line (c1-c2). Specifically, the distance (b4-c1) is calculated. The distance (b3
-C2) does not matter. ST12: The distance (b4-c1) or the distance (b3-)
Only the c2) moves the conveyor 4C to the center of the line.

The flow described above is summarized in FIG.
In (a), corners (points) a1, a2, b1 to b4
And c1 and c2 are detected, and in (b), the cutting plate 4A and the cutting plate 4C are horizontally swung as much as necessary until the opposite sides are parallel to each other, and in (c), the cutting plate 4B is cut to the central cutting plate 4B. The plate 4A and the cut plate 4C are brought close together.

In this embodiment, the cut plates 4A of three rows (three rows) are used.
Although 4C has been described as an example, the number of cut plates may be two (two rows) or four (four rows) or more.

[0034]

The present invention has the following effects due to the above configuration. According to a first aspect of the present invention, a material supply unit that supplies at least two strips, a first cutting unit that cuts the strip into a predetermined length, and the cut plates are relatively moved sideways. It is a plate material processing line provided with width-shifting means for contacting each other and welding means for welding the contacting portions of the width-shifted cut plates.

Cut out a plurality of cutting plates from a plurality of strips,
After the widths of these are aligned, the abutting portion is welded to manufacture a wide plate for press forming. Conventionally, a wide plate for press forming was manufactured with a punching die and a punching press machine, but in the present invention, the punching die and the punching press machine are unnecessary, so that the equipment cost can be suppressed. it can. Further, since the width of the wide plate can be changed only by changing the number of strips, the work to be handled becomes abundant and the versatility is enhanced, which is especially suitable for small-quantity multi-production.

According to a second aspect of the present invention, there is provided a material supplying means for supplying at least two strips and a first strip for cutting the strip into a predetermined length.
A cutting means, a width-shifting means for relatively width-cutting the cut plates relative to each other to bring the side surfaces into contact with each other, a welding means for welding the abutting portions of the width-cut cut plates, and the obtained wide width It is a plate material processing line provided with a second cutting means for cutting out a press blank blank having a desired shape from a plate.

Cut out a plurality of cutting plates from a plurality of strips,
After the widths of these are brought close to each other, the contact portion is welded and then cut into a desired shape to manufacture a press blank material.
Conventionally, a blank for press for press forming was manufactured with a punching die and a punching press machine, but in the present invention, the punching die and the punching press machine are not required, so the equipment cost is suppressed. be able to. Further, since the width of the wide plate can be changed only by changing the number of strips, the work to be handled becomes abundant and the versatility is enhanced, which is especially suitable for small-quantity multi-production.

A third aspect of the present invention is a method for manufacturing a blank material, characterized in that rectangular cut plates having different plate thicknesses are integrated by welding. Conventionally, a punching die and a punching press are used to punch-manufacture small parts and weld these small parts into a blank for press. On the other hand, in the present invention, rectangular cut plates having different plate thicknesses are integrated by welding to form a press blank material. Therefore, according to the present invention, an expensive punching die and punching press machine are not required, and the equipment cost can be suppressed.

[Brief description of drawings]

FIG. 1 is a plan view of a processing line according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view of the width adjusting means according to the present invention.

FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;

5 is a sectional view taken along line 5-5 of FIG.

FIG. 6 is an operation explanatory view of the processing line according to the present invention.

FIG. 7 is an operation explanatory view of the width-shifting means according to the present invention.

FIG. 8 is an operation flow chart of the width-shifting means according to the present invention.

[Explanation of symbols]

1 ... Machining line, 2A, 2B, 2C ... Coil, 3A, 3
B, 3C ... Strip plate, 4A, 4B, 4C ... Cutting plate, 5 ... Wide plate, 6 ... Assembly blank material (press blank material), 7 ...
Abutting portion, 8 ... bead, 10 ... material supply means, 20 ... first
Cutting means, 21 ... Cutter, 30 ... Width adjusting means, 32A,
32B, 32C ... Conveyor, 34, 35, 36, 37 ...
Plate edge detecting means, 41A, 41B, 41C ... Feed screw, 44A, 44B, 44C ... Swing motor, 55A, 5
5B, 55C ... Electromagnetic rail, 63A, 63B, 63C
... Feed motor, 70 ... Welding means, 74 ... Welding torch, 8
0 ... second cutting means, 84 ... cutting torch.

Claims (3)

[Claims] 1. A plate material processing line for manufacturing an aggregate blank material by joining plate materials having different plate thicknesses, and a material supply means for supplying at least two strips, and the strips having a predetermined length. First cutting means for cutting into pieces, width-adjusting means for relatively width-cutting the cut plates to bring the side surfaces into contact with each other, and welding means for welding the abutting portion of the cut-plates A plate material processing line characterized by having and. 2. A plate material processing line for manufacturing an aggregate blank material by joining plate materials having different plate thicknesses, wherein material supplying means for supplying at least two strips, and the strips having a predetermined length. First cutting means for cutting into pieces, width-adjusting means for relatively width-cutting the cut plates to bring the side surfaces into contact with each other, and welding means for welding the abutting portion of the cut-plates A plate material processing line comprising: a second cutting means for cutting a press blank of a desired shape from the obtained wide plate. 3. A method for manufacturing a blank material for press forming, which comprises integrally forming rectangular cut plates having different plate thicknesses by welding.