JPH0218933B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming metal plates used as electronic components such as semiconductors and transistors, and more specifically, the present invention relates to a method for forming metal plates used as electronic components such as semiconductors and transistors. , relates to a method of manufacturing a metal strip while stretching it in the direction along the rolling roller axis (in the strip width direction).

The development of semiconductor technology in the electronic technology industry has encouraged the miniaturization and higher density of electronic equipment, and there has been a strong demand for smaller parts such as relays and connectors as mechanical parts used therein. For example, as shown in FIG. 1, a metal plate used as such an electronic component has a thick part 2 and thin parts 3 integrally formed on both sides thereof. That is, if this type of metal plate 1 is considered to be a flat strip plate shown in FIG. 2, the diagonal lined portions 3a, 3a are removed along the longitudinal direction of the metal plate 1. The easiest way to manufacture such a metal plate 1 is to cut the diagonally shaded portions 3a, 3a with a milling cutter or the like, but since there is a large loss of material due to cutting, it is difficult to save resources. I don't like it from my point of view. Therefore, as shown in FIG. 3, a method was devised in which a portion that would become the thick wall portion 2 was left and only the portions on both sides of the thick portion were rolled using rolling rollers. However, according to the normal rolling manufacturing method, the rolled portion is stretched in the longitudinal direction by a rolling roller to form a thin wall portion, so that the thin wall portion 3,
The width t of No. 3 is almost the same as the width ta before rolling (Fig. 3). Therefore, in order to obtain the thin portion 3 having the desired width T (FIG. 2), it is necessary to select a wide material for the metal plate 1. In addition, in this rolling manufacturing method, since the metal plate 1 is stretched by pressing the rolling roller from the direction of arrow A, the boundary between the non-rolled part (thick part 2) and the rolled part (thin part 3) Excessive internal stress remains in 2a (Figure 4). Therefore, the physical strength of the part is reduced, and the product value of the metal plate 1 is significantly reduced.

We thought that it would be possible to prevent material loss and decrease in physical strength due to internal stress by stretching the metal plate 1 in the width direction (arrow B) as shown in Fig. 6. It has been found that rolling in the width direction B can be carried out smoothly by using a rolling roller 6 as shown in FIG. In the figure, the rolling roller 6 and the metal plate 1 are shown separated from each other for convenience of explanation. That is, the outer circumferential surface of the rolling roller 6 is formed into a substantially V-shape (see FIG. 10) in which the width and length W continuously vary in the circumferential direction, leaving grooves 7b for thick-walled portions on both sides thereof. Along with the formation of the plateau area 7,
Downward slopes 7a, which serve as rolling surfaces in the width direction, are formed on both side edges (bottoms) of the plateau portion 7. Therefore, the plateau portion 7 rolls the metal plate in the direction of arrow A, and the bottom portion 7a rolls the metal plate in the direction of arrow C. Note that the groove portion 7b may be omitted if necessary to form a wide plateau portion as a whole, and in this case, the formation of the thick portion 2 is omitted.
Therefore, a basin portion 17 is formed corresponding to the plateau portion. However, from a relative point of view, the rolling roller 6 rolls on the metal strip in the longitudinal direction, so the downward slope 7a of the rolling roller is the basin portion 17.
As a result, the upward slope 17a of the metal plate 1 can be expanded in the direction B sequentially, and the metal plate 1 can be expanded in the width direction rather than in the longitudinal direction. Even if it is, it can be rolled and formed into a metal plate with a desired wide dimension.
Therefore, the residual stress generated at the boundary between the thick wall portion 2 and the thin wall portion 3 is sequentially released to both side edges, so that a decrease in strength and a loss of material due to cutting do not occur. Further, by applying such a stretching technique, a flat metal plate as shown in FIGS. 7 and 8 or a metal plate with thick portions left on both edges can be formed as desired.

The manufacturing method of the present invention proposed based on such considerations is that the rolling surface of a rolling roller that is pivotally supported on a fixed roller stand has a width that varies sequentially along the circumferential direction in a plan view. A V-shaped plateau is formed so that both skirts of the plateau slope downward in the axial direction, and the rolling roller is rotated while pressing against the metal strip. The metal strip is transferred in the longitudinal direction, and a V-shaped basin portion in plan view is formed on the pressed surface of the metal strip, with upward slopes on both sides corresponding to the shape of the plateau, and whose width and length vary sequentially. By rolling the strip in the longitudinal direction, then rotating the rolling roller in the opposite direction to return the strip in the longitudinal direction, and then repeating the rolling operation by slightly shifting the metal strip and moving it forward. The gist is that the upslope of the basin area is expanded in the width direction by the downslope of the plateau area.

The configuration and effects of the present invention will be explained below based on the drawings, which are examples. Any application to the production of metal plate shapes is within the technical scope of the present invention.

FIG. 9 is a side view schematically illustrating a metal plate rolling machine to which the manufacturing method according to the present invention is applied,
8 is the rolling machine body, 9 is a strip-shaped metal sheet material roll,
10 is a metal plate take-up roll, 11a is a feeding roller,
Reference numeral 11b indicates a take-up roller. The rolling machine main body 8 is provided with a rolling mill 12 and a clamping machine 13, and the metal plate 1 wound around the roll 9 is delivered from the feeding roller 11a to the rolling mill 12 via the clamping machine 13, where it is transferred to the rolling roller 6 and the flat roller. After being rolled between the metal plate winding rollers 14 and 14, the metal plate is wound up on the metal sheet winding roll 10 via the take-up roller 11b. These rolling rollers 6 and flat rollers 14 are driven intermittently in reverse by a drive mechanism (not shown) as will be described later. Also clamp machine 1
3 is configured so that the metal plate 1 is checked and fed to the rolling machine main body 8 only when the metal plate 1 is fed intermittently. FIG. 10 is an enlarged perspective view of the rolling roller 6 and the flat roller 11 provided in the rolling machine main body 8. Between the rolling roller 6 and the flat roller 11, there is a metal plate 1 fed from the direction of arrow D. inserted. The supplied strip material passes through the V-shaped plateau 7 provided on the rolling surface of the rolling roller 6, as explained in FIG.
A metal plate 1 having a convex cross section and having a wide thin wall portion 3 is manufactured by the above method. That is, the rolling roller 6 has a V-shaped plateau portion 7 whose width changes sequentially in the circumferential direction on its rolling surface on both sides of the thick-walled portion forming groove portion 7b, and also forms a V-shaped plateau portion 7 on both sides of the thick portion forming groove portion 7b. Both skirts facing toward are formed with downward slopes 7a, and a non-rolled surface 15 having an outer diameter smaller than the rolled surface is provided on the roller circumferential surface on the opposite side of the plateau portion 7.
is formed. On the other hand, the flat roller 11 is formed so as to be in even contact with the back surface of the metal plate 1. Therefore, when rolling the metal plate 1 with the rolling roller 6 and the flat roller 11 configured in this way, first, the rolling roller 6 and the flat roller 11 are moved in the direction of arrow E while holding the metal plate 1 between them. Rotate to The rotation at this time is such that the plateau portion 7 rolls on the upper surface of the metal plate 1 from the plateau front end side 16a to the plateau rear end side 16b. On the other hand, when the rolling roller 6 rotates in the direction of arrow E, the metal plate 1 is transferred in the direction opposite to arrow D.
The metal plate 1 that has been rolled approximately half a turn is the 11th
As shown in the figure, an inverted V-shaped unrolled part 3 is formed on both edges.
b, 3b, and thin-walled portions 3, 3 in the stretching process are formed, and a thick-walled portion 2 is formed inside thereof.

The rolling process carried out in this manner per one time will be explained below using the principal part depiction diagrams of FIGS. 12 to 16. Note that FIG. 12 shows a state in which one round of rolling has been completed and the roll has been reversed and returned to the rolling starting point.
13 to 16 are explanatory diagrams showing the rolling state of the rotating rolling roller 6 and the metal plate 1, and lines a, a, and a shown in FIG. 12 are -
, -, - shows the corresponding positions of the rolling roller 6 when the lines are reached. That is, as shown in FIG. 16, the metal plate 1 before rolling is in a state where the flat roller 11 is inserted between it and the non-rolled surface 15, so that the cross-sectional shape of the strip material remains unchanged. When the rolling roller 6 and the flat roller 11 start rotating as described above, they gradually move on the metal plate 1 from the plateau front end side 16a to the plateau rear end side 16b (FIGS. 15 to 13). Therefore, the metal plate 1 to be rolled is gradually stretched along the axial direction of the roller by the slope 7a of the V-shaped plateau 7, leaving a thick part 2 and wide thin parts 3 on both sides thereof. form (third
figure). In this way, the rolling by the rolling roller 6 is 1
When the process is finished, the rolling roller 6 and the flat roller 11
Flip it back to its original state. At this time, the metal plate 1 is returned in the direction of arrow G as the rollers 6 and 11 rotate (FIG. 12). As mentioned above, since the metal plate 1 reciprocates in the directions of the arrows F and G each time, the distance between the metal plate material roll 9 and the take-up roll 10, which are placed on both sides of the rolling mill, and the rolling mill 12. It is recommended that the metal plate 1 installed on the ground be slackened (Fig. 9).

When one rolling process is completed as described above and the rolling roller 6 is reversed and returned to its original position (Fig. 17),
The non-rolling surface 15 of the rolling roller 6 rotates to the insertion position of the metal plate 1, and the pinched state between the rolling roller 6 and the flat roller 11 is released. When the clamping of the metal plate is released in this manner, the clamping machine 13 is activated, chucks the metal plate 1, and pushes out the metal plate 1 by a certain amount in the direction of arrow G (FIG. 12). At this time, the take-up roller 11b and the take-up roll 10 rotate in the metal plate winding direction, and take up the metal plate 1 that has been pushed out by a certain amount. Then, as shown in FIG. 18, when the metal plate 1 is pushed out a certain amount to the virtual line position, the clamping machine 1
3 is released, and rolling by the rolling mill 12 is performed again. That is, when the metal plate 1 moves to the imaginary line position, the stretched portion rolled by the rolling roller 6 is slightly displaced in the metal plate winding direction. For example, as shown in Fig. 11, the X portion (virtual cross section) where the previous rolling process was formed is sent to the Y position by the above movement (in this case, the length of extrusion by a certain amount per time is (corresponds to the length between X and Y). In this state, rolling mill 1
2 is operated in the same manner as described above, and the metal plate 1 is rolled by the rolling roller 6, the unstretched portion 3b' shown by the imaginary line is rolled by the slope 7a and rolled in the width direction. An unstretched portion 3b as shown by a solid line is formed. This is because the rolling trajectory of the plateau 7 formed on the rolling surface of the rolling roller 6 always draws the same trajectory, but the metal plate 1 is moved toward the rolled product delivery side every cycle of the rolling roller. This is because the relative positional relationship between the rolling roller 6 and the metal plate 1 is changed by moving it.
In other words, the rolling roller 6 rolls the unrolled portion every cycle. Therefore, as shown in FIG. 19, the metal plate 1 sent to the Y position is rolled by the slope 7c from above on the stretched surface 3c, so that a horizontal component force is applied to the stretched surface 3c undergoing rolling. The stretched surface 3c is stretched in the width direction of the metal plate 1. In addition, such extension in the width direction is performed by adjusting the angle of inclination θ ₁ between the plane of the plateau 7 and the slope 7a to approximately 15 to 25 degrees Celsius, as shown in FIG.
It was the smoothest case. Further, when the V-shaped plateau portion 7 had a V-shaped angle θ ₂ of 5 to 10°, the most preferable stretched shape was obtained.

In this way, by shifting the rolling surface by the rolling roller 6 by a certain amount every cycle, the metal plate 1 is gradually stretched in the width direction, so that the metal plate 1 can be rolled from a narrow strip material to a metal having a desired product width. Boards can be manufactured. Therefore, if the plateau formed on the rolling roller 6 is shaped as shown in FIGS. 21 and 22, the metal plate shown in FIGS. It also becomes possible to manufacture while stretching.

Since the present invention is configured as described above, effects as summarized below can be obtained.

(1) Rolling with a rolling roller can be changed to stretching in the width direction.

(2) A molded product with an uneven cross section can be rolled by stretching in the width direction.

(3) Since rolling forming in the width direction is now possible, the strength of molded products with an uneven cross section can be particularly increased.

(4) The processing speed of rolled products can be increased,
Moreover, the structure of the rolling equipment becomes simple, and equipment costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a metal plate, Figs. 2 and 3 are explanatory views showing a known manufacturing method, Fig. 4 is an explanatory view of an end face after processing, and Figs. 5 and 6 are basic technical ideas of the present invention. 7 and 8 are explanatory diagrams showing other embodiments.
The figure is a conceptual diagram of a rolling device to which the present invention is applied, No. 10
The figure is a perspective view of the main part, Figure 11 is a partially enlarged view, and Figure 12 is a partially enlarged view.
Figures 17 to 17 are explanatory diagrams of the rolling process, Figure 18 is a plan view of the metal plate in the rolling process, Figure 19 is an explanatory diagram showing the rolling situation, Figure 20 is an explanatory diagram of the configuration of the plateau area, and Figure 2
1 and 22 are explanatory diagrams showing other embodiments. 1...Metal plate, 2...Thick wall part, 3...Thin wall part,
6... Rolling roller, 7... Plateau section, 8... Rolling machine main body, 9... Material roll, 10... Winding roll.

Claims (1)

[Claims] 1. On the rolling surface of a rolling roller that is pivotally supported on a fixed roller stand, a V-shaped plateau in plan view whose width and length varies sequentially along the circumferential direction is formed. The rolling roller is rotated while pressing the metal strip to transfer the metal strip in the longitudinal direction, and the rolling roller is rotated while pressing the metal strip to transfer the metal strip in the longitudinal direction. On the pressing surface, a V-shaped basin part in plan view with uphill slopes on both sides corresponding to the shape of the plateau part and whose width and length vary sequentially is rolled in the longitudinal direction of the strip, and then the rolling roller is reversed. By rotating and returning the strip to the longitudinal direction, and then moving the metal strip forward with a slight shift and repeating the rolling operation, the upslope of the basin section is turned axially with the downslope of the plateau section. A method for manufacturing a metal strip, characterized by stretching it in a pushing and expanding manner.