JPH01289501A - Manufacture of deformed strip - Google Patents

Abstract

PURPOSE:To efficiently form an accurate difference of the surface level by forming a groove in the axial direction on the surface of a drafting roll, intermittently inserting a bar stock having a rib between a flat plate and the roll, and forming a level difference in lateral direction on the stock by rolling the stock in the lateral direction by use of parts except the groove. CONSTITUTION:A groove 4 in the roll axial direction is formed on the surface of a drafting roll 3 reciprocally rocking on a flat plate 2 and a gap between the plate 2 and the roll 3 is gradually reduced in the roll axial direction by tilting the axis of the roll 3 against the plate 2. A stock 1 having a rib corresponding to the groove 4 on the longitudinal surface is intermittently inserted between the plate 2 and the roll 3 in the roll axial direction with the stock given a tension in the longitudinal direction. The stock 1 is rolled in the lateral direction by use of parts except the groove 4 to form level difference in the lateral direction of the stock 1.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention has steps with different thicknesses in the width direction, which are used in the manufacture of terminals for electrical and electronic components, lead frames for power transistors, relay sections for relays, etc. This relates to a method for manufacturing irregularly shaped strips.

(Prior art) In general, the above-mentioned irregularly shaped strips are
The irregularly shaped strips having the cross-sectional shapes shown in c) and (d) are often used, and are manufactured by the usual cutting method, irregular groove rolling method, extrusion method, usage method, etc. The cutting method involves scraping off the thinned portion, and is a method with poor yields that generates a large amount of cutting waste.

The irregular groove rolling method involves sequentially rolling a number of rolls with gradually changing grooves to obtain a desired cross-sectional shape.
If a complex shape is formed by rolling multiple times, the processing strain cannot be balanced and unnecessary waving may occur, requiring multiple processing steps. Therefore, not only a large number of rolls are used, but the design of the grooves changes gradually, which increases manufacturing costs, and the method is not suitable for manufacturing a wide variety of products in small quantities, such as electronic parts. In the extrusion method, a billet is extruded into a desired cross-sectional shape through a die, and irregularly shaped strips can be easily manufactured. However, not only is the dimensional accuracy inferior, but the length is essentially short, so this method is contrary to the current demand for lengthening. Moreover, the method of use is to process the wire through a die, and it is possible to process the wire into irregular shapes relatively easily. However, not only is it not possible to obtain a high processing rate, but the method is originally based on processing wire rods, and is not suitable for processing wide materials.

In recent years, a special reciprocating rolling method using a triangular die has been proposed for processing wide irregularly shaped strips. In this method, the strip is rolled in the longitudinal direction and expanded in the width direction using the corners of a triangular die. The productivity was poor.

On the other hand, a method is known in which a wire rod or strip is rolled perpendicularly to the longitudinal direction, that is, in the width direction, to obtain a width several times larger than that in the material, which cannot be obtained by normal rolling. This method uses a reduction roll that reciprocates on a flat plate, presses the wire or strip in the roll axis direction between the flat plate and the reduction roll, and rolls the wire or strip in the width direction by the rolling of the reduction roll. It is.

(Problems to be Solved by the Invention) All of the above-mentioned methods for manufacturing irregularly shaped strips have advantages and disadvantages, and it is not possible to efficiently manufacture long irregularly shaped strips with excellent dimensional accuracy. For example, using a triangular die Even with the special reciprocating rolling method, as mentioned above, in the width direction widening process, the amount of medium expansion due to reciprocating rolling is not so large, and the processing speed is low, which requires multiple processing operations to produce irregularly shaped strips. It is slow and less productive.

[Means for solving problems]

In view of this, as a result of various studies, the present invention has developed a method for manufacturing irregularly shaped strips that can efficiently roll strips in the width direction and form steps with different thicknesses in the width direction with high precision. An axial groove is formed on the surface of a reduction roll that reciprocates on a flat plate, and grooves corresponding to the sides of the groove are formed in the longitudinal direction of the surface in the axial direction of the roll between the flat plate and the reduction roll. is inserted intermittently, and the strip is rolled in the width direction in a region other than the concave groove to form a step in the width direction of the strip.

That is, as shown in FIGS. 1(A) and 1(B), the present invention forms concave grooves (4) in the roll axis direction on the surface of a reduction roll (3) that reciprocates on a flat plate (2). , the axis of the roll-down roll (3) is tilted with respect to the flat plate (2), the gap between the flat plate (2) and the roll-down roll (3) is gradually narrowed in the roll axis direction, and the flat plate (2) is
) and the reduction roll (3), the strip (4) has grooves corresponding to the sides of the concave grooves (4) formed in the longitudinal direction of the surface in the roll axis direction.
is inserted intermittently while applying tension in the longitudinal direction, and the strip (1
) is rolled in the width direction at a portion other than the concave groove (4) to form a step in the width direction of the strip (1).

The flat plate (2) and the roll-down roll (3) are provided in the housing (6) to support the flat plate (2), and the roll-down roll (3)
A backup roll (5) is attached on top, and the backup roll (5) is backed up by a support plate (7) provided on the upper side of the housing (6). In this way, the reduction roll (3) and the backup roll (5) are rolled in a direction perpendicular to the roll axis by a power transmission device using, for example, a crank mechanism.
b), (5b) Repeat rolling left and right to roll the strip (1) in the width direction outside the concave groove (4), so that the rolling roll (3) forms the shape (3a) or (3b) shown in the figure. ) and when the reduction roll (3) is not biting the web (1), the web (1) has grooves formed in the longitudinal direction of its surface corresponding to the sides of the concave grooves (4). It is rolled by applying tension in the longitudinal direction and intermittently inserting it for a certain length.

To apply tension in the longitudinal direction of the strip (1), install caterpillar capstans at the front and back of the roll (3) in the axial direction to clamp the inserted strip (1), or as shown in Fig. 2. A pair of upper and lower rolls like pinch rolls (8) as shown
, (9) are provided to clamp the material (1) to be inserted, brake the front roll (8) or capstan, and press the rear roll (9).
) or drive the capstan intermittently.

Also, between the flat plate (2) and the reduction roll (3), there is a groove (1a) corresponding to the side of the concave groove in the longitudinal direction of the surface, as shown in FIG.
) In order to insert and roll the raw material (1) having formed with The thin side (1
b) is rolled in the width direction. The groove (
In order to form 1a), grooves corresponding to the sides of the concave groove portion are formed in the longitudinal direction through a groove roll in advance, or a second
Instead of the front roll (8) shown in the figure, a flat roll (10) and a grooved roll (11) are used as shown in Figure 4, and these are not driven and the rear roll of the reduction roll is intermittently driven. By doing so, grooves (1a) are formed in the longitudinal direction of the strip (1).
form. At this time, the thick side step portion (1C) is formed to have accurate dimensions.

[For production]

According to the present invention, the thin-walled portions of the strip are gradually processed in the width direction, so there is no unprocessable corrugation in the thin-walled portions, and the feed distance per time is approximately several tens of meters. It's not unreasonable. In addition, since the cross section is gradually deformed and tension is applied to the material, the material is kept in a fixed position and bending can be reduced during rolling in the width direction, resulting in misalignment with the concave groove of the rolling roll after each rolling. There isn't. In addition, by forming grooves corresponding to the desired steps in the longitudinal direction of the surface of the raw material in advance, even when there is no or little tension, the quality of the product is stable because it is not affected by bending during rolling in the width direction. The step portion can be formed with high precision. In addition, if tension is applied to this, the shape of the stepped part can be further changed.
The dimensions will be more accurate.

Although the manufacturing of the irregularly shaped strips shown in Figure 6 (A) has been explained above, it is not limited to this, and Figures 6 (B) and (C)
Of course, (d) can also be easily manufactured by processing the irregularly shaped strip shown in FIG. 6(a) and then inverting and processing this. Furthermore, if a finishing roll with irregularly shaped strips as shown in FIG. 5 is used as the roll that clamps the worked strip behind the reduction roll, the shape and dimensions of the irregular strips can be finished more accurately.

(Example) (1) By the method shown in Fig. 1 (a) and (b), a thickness of 3
A copper strip having a width of 501 nIn and a width of 501 nIn was used to produce a deformed strip having the cross-sectional shape shown in FIG. 6(A). First, a width of 16 mm was applied to the surface of the copper strip.
Grooves with a width of 3M and a depth of 2M are formed at intervals of # by rolling,
A unit tension of 10 KI/rrvA was added to this, and the strip was rolled at a feed rate of 30 m to obtain a deformed strip with a thick wall thickness of 3 mm and a thin wall thickness of 1 M. Although the 1q irregularly shaped strip had some curvature, the shape of the stepped portion remained as a rolled groove and was in very good condition.

〔Effect of the invention〕

According to the present invention, since the thick part is not rolled when rolling various irregularly shaped strips in the width direction, the concave groove portion of the reduction roll hardly changes and only the depth needs to be changed, and the manufacturing cost of the reduction roll is low. Applying tension will significantly improve the quality of the product.

In addition, by arranging a brake roll and a drive roll before and after the reduction roll, it is possible to perform tandem processing, making it easy to manufacture and reducing the manufacturing cost of irregularly shaped strips. Furthermore, it is suitable for high-mix, low-volume production of electrical and electronic parts. It has a remarkable industrial effect.

[Brief explanation of the drawing]

Figures 1 (a) and (b) show an example of the manufacturing method of the present invention, in which (a) is a front view, (b) is a side view, and Figure 2 shows the fabric in the manufacturing method shown in Figure 1. 3 is a plan view showing an example of the deformed state of the filament in the manufacturing method shown in FIG. 1; FIG. 4 is a front view showing an example of the grooved roll; Figure 5 is a front view showing an example of a finishing roll for irregularly shaped strips, Figures 6 (A), (B), (C), (
d) shows the cross-sectional shapes of different irregularly shaped strips. 1... Plain strip, 2... Flat plate, 3... Reduction roll, 4
...Concave groove, 5...Backup roll, 6...Housing, 8...Front roll, 9...Back roll

Claims (2)

[Claims] (1) An axial groove is formed on the surface of the reduction roll that reciprocates on a flat plate, and grooves corresponding to the sides of the groove are formed in the longitudinal direction of the surface in the roll axis direction between the flat plate and the reduction roll. A method for manufacturing irregularly shaped strips, characterized by intermittently inserting the formed strips and rolling the strips in the width direction in a region other than the concave groove to form steps in the width direction of the strips. (2) In front of the reduction roll, grooves corresponding to the sides of the concave grooves are formed in the longitudinal direction of the surface of the web using a grooving roll, and at the rear, the web is held between the rolls and placed between the flat plate and the reduction roll. A method for manufacturing a deformed strip according to claim 1, in which the strip is inserted intermittently.