JP4132885B2 - Method for manufacturing grid for battery electrode plate - Google Patents

Description

ここで、鉛シート５は常に右水平方向に引き出し搬出して展開工程に送り込むこととし、円板カッタロール１，２の軸心同士を結ぶ軸心面と水平面との角度θを変えることにより、鉛シート５の搬出角度θを０°とした従来例と、５°から９０°を超える角度まで変化させた実施例とにより比較を行った。
【００２４】
上記円板カッタロール１，２には、上下方向の変位計を設置して、スリット５ａの形成加工時の平均的な振動幅を測定し、従来例を１００としたときの各搬出角度θの実施例についての振動幅比を調べた。また、鉛シート５にスリット５ａを形成した後に所定量まで展開した格子体について、従来例を１００としたときの各搬出角度θの実施例についての格子の破断数比を調べた。さらに、格子に破断が起こらないように、スリット形成工程と展開工程の加工速度を調整して作製した格子体について、活物質を充填し熟成及び乾燥を行って正極板として鉛蓄電池（ＪＩＳ形式５５Ｄ２３形）に組み込みＪＩＳ過充電試験を１カ月実行した後の格子の腐食量を調査し、従来例を１００としたときの各搬出角度θの実施例についての腐食量比を調べた。なお、この鉛蓄電池は、いずれの場合も、負極板として従来例のものを用い、これらの極板間に微孔性のポリエチレンを主体としたセパレータを介在させた。
【００２５】
上記比較試験の結果、円板カッタロール１，２の平均振動幅比と格子の破断数比は、鉛シート５の搬出角度θが９０°の場合を最小として、この搬出角度θが大きい実施例ほど良好な結果が得られた。ただし、格子の腐食量比については、搬出角度θが４５°〜６０°の場合の実施例が最小値となったが、この搬出角度θが９０°の場合でも、従来例に比べれば腐食量は減少している。なお、このように鉛シート５の搬出角度θが大きくなると格子の腐食量比が大きくなるのは、この搬出角度θが大きいほど鉛シート５が上方の円板カッタロール１の周面に沿って長く搬送されるので、この間に鉛シート５が大きく湾曲させられて歪みが大きくなるためであると考えられる。
【００２６】
【発明の効果】
以上の説明から明らかなように、本発明の電池極板用格子体の製造方法によれば、金属シートが２本の円板カッタロールの間を通り抜けた後に、これらの円板カッタロールの周面から段階的に順に引き離すので、搬出されたスリット形成済み金属シートが不安定な状態になって波打ったり振動を起こすようなことがなくなる。
【図面の簡単な説明】
【図１】 本発明の一実施形態を示すものであって、ロータリ式エキスパンダのスリット形成工程を示す正面図である。
【図２】 従来例を示すものであって、ロータリ式エキスパンダのスリット形成工程を示す正面図である。
【図３】 従来例を示すものであって、ロータリ式エキスパンダのスリット形成工程において２本の円板カッタロールの間を通り抜けた鉛シートが波打って引き出される様子を示す正面図である。
【符号の説明】
１ 第一の円板カッタロール
２ 第二の円板カッタロール
３ 円板カッタ
３ａ 山部
４ 円板カッタ
４ａ 山部
５ 鉛シート
５ａ スリット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a grid for a battery electrode plate, in which a grid for a plate is manufactured by a rotary expander.
[0002]
[Prior art]
The electrode plate of the lead-acid battery is obtained by filling an active material into the grid of a grid made of lead or a lead alloy. In addition to producing the lattice body directly in a lattice shape by casting lead or a lead alloy, the lattice body may be produced by forming a grid on a lead sheet made of lead or a lead alloy by an expander. In this expander, a reciprocating system in which each square is formed in order from both ends of the lead sheet by moving the die cutter up and down, and a staggered slit is formed in the lead sheet by rotating the disc cutter (slit forming step). ), And expanding the lead sheet from both sides to expand the slit into a square (developing step).
[0003]
A conventional configuration example of the slit forming step in the rotary type expander (rotary type expander) is shown in FIG. In this rotary expander, first and second two disc cutter rolls 1 and 2 are arranged above and below, and a slit-unformed lead sheet 5 made of lead or a lead alloy is passed between them. ing. The upper and lower disk cutter rolls 1 and 2 are fixed by arranging a large number of disk cutters 3 and 4 on a common rotating shaft at a distance substantially equal to the thickness of one disk cutter 3 and 4. It is a thing. Each of the disk cutters 3 and 4 has peak portions 3a and 4a in which peripheral surfaces projecting in a chevron shape are formed on the outer peripheral side of the circumferential surface of the predetermined radius on the peripheral portion of the metal disk having the predetermined radius. Are formed at equal intervals over the entire circumference. Further, although not shown in each of the disk cutters 3 and 4, the concave grooves opened in the valleys between these peak parts 3 a and 4 a are adjacent to each other via the peak parts 3 a and 4 a. It is formed along the radial direction at the peripheral edge of the disk surface whose front and back are reversed at the troughs.
[0004]
The upper and lower disk cutter rolls 1 and 2 having the disk cutters 3 and 4 having the above-described configuration are arranged so that the respective axis centers are parallel to each other in the horizontal direction, and the peripheral portions of the disk cutters 3 and 4 are alternately arranged. They are arranged so that the distance between the shaft centers is such that they enter and engage with each other. That is, each disk cutter 3 of the upper first disk cutter roll 1 has a crest 3a reaching the lower end and enters a gap between each disk cutter 4 of the lower second disk cutter roll 2. In each of the disk cutters 4 of the lower second disk cutter roll 2, the peak portion 4 a reaching the upper end enters the gap between the disk cutters 3 of the upper first disk cutter roll 1. The upper and lower disk cutters 3 and 4 are configured such that their valleys slightly overlap each other.
[0005]
When the lead sheet 5 with no slit is passed between the disk cutter rolls 1 and 2, the crests 3a and 4a of the upper and lower disk cutters 3 and 4 and the concave grooves of the valleys are not formed. The lead sheet 5 is cut by overlapping the edges vertically, and a large number of slits 5a as shown in the plan view in the circle of FIG. 2 are formed. Further, between these slits 5 a arranged in the width direction of the lead sheet 5, a crosspiece 5 b that is pressed by the crest 3 a of the upper disc cutter 3 and protrudes in a mountain shape below the lead sheet 5, and a lower disc The bars 5b that are pressed by the crest 4a of the cutter 4 and project in a mountain shape above the lead sheet 5 are alternately arranged in the width direction. These slits 5a are interrupted in the middle by the recessed grooves formed alternately on both disk surfaces for the valleys of the upper and lower disk cutters 3 and 4, so that a knot 5c is formed. In addition, the slit 5a adjacent in the width direction is formed so that the position of the knot portion 5c is shifted by a half pitch of the slit 5a. Therefore, the numerous slits 5a formed in the lead sheet 5 are staggered as shown in the plan view in the circle of FIG.
[0006]
The lead sheet 5 on which a large number of slits 5a are formed by the slit forming process is spread on both sides in the width direction in the unfolding process, which is a subsequent process of the rotary expander. The grid-like lattice body used for the electrode plate of the lead storage battery is developed.
[0007]
[Problems to be solved by the invention]
However, in the slit forming step in the conventional rotary expander, the lead sheet 5 that passes between the upper and lower two disc cutter rolls 1 and 2 is placed horizontally, that is, the axis of the first disc cutter roll and the first center. Since the lead sheet 5 with slits formed becomes unstable at the carry-out portion, the lead sheet 5 becomes unstable at the carry-out portion because it has been pulled out and carried out in a direction perpendicular to the axial center connecting the axis of the second disc cutter roll. There has been a problem that the shape of the grid of the lattice after development may become irregular.
[0008]
That is, the crests 3a and 4a of the disc cutters 3 and 4 of the upper and lower disc cutter rolls 1 and 2 not only cut the lead sheet 5 to form the slits 5a but also the crests 3a and 4a. A mountain-shaped projecting portion projects the crosspiece 5b in the vertical direction. Accordingly, when the crests 3a and 4a move to the lower end and the upper end as the disc cutters 3 and 4 rotate, they penetrate the lead sheet 5 from above and below and bite between the slits 5a. Therefore, when the crests 3a, 4a move upward or downward in accordance with the subsequent rotation of the disk cutters 3, 4, the lead sheet 5 originally carried out in the horizontal direction becomes the crests 3a, 4a. And try to move up and down together. For example, FIG. 3 shows a state in which the lead sheet 5 is hooked on the peak portion 4 a of the lower disk cutter 4 and is once moved downward in the carry-out portion A as the disk cutter 4 rotates. Moreover, the horizontal direction in which the lead sheet 5 is drawn out is parallel to the axis of the upper and lower two disc cutter rolls 1 and 2 and is along a reference tangential plane orthogonal to the plane connecting these axes. Therefore, the lead sheet 5 is pulled away from the crests 3a and 4a of the upper and lower disk cutters 3 and 4 at the same time when the lead sheet 5 is carried out. Whether the lead sheet 5 actually moves in any of the upper and lower directions along with either of these peak portions 3a and 4a depends on how the peak portions 3a and 4a bite into or get caught in the slit 5a. Since the lead sheet 5 changes from time to time and becomes unstable, the lead sheet 5 is pulled out while undulating in the carry-out portion A. Further, since the lead sheet 5 is pulled out horizontally in the right direction in FIG. 3, even if the peak portions 3a and 4a are caught between the slits 5a, the lead sheet 5 suddenly and suddenly rotates with the rotation of the disk cutters 3 and 4. It will come off. For this reason, every time the crests 3a, 4a are disengaged from between the slits 5a, the disc cutter rolls 1, 2 generate vibrations in the vertical direction. In some cases, the grids of the grids of the grid were irregular.
[0009]
The present invention has been made in order to cope with such a situation. When the metal sheet is placed along one of the two disc cutter rolls and then pulled out, the metal sheet is waved at the carry-out portion. An object of the present invention is to provide a method of manufacturing a battery electrode plate grid that does not strike or vibrate.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, a first disk cutter roll and a second disk cutter roll, in which a large number of disk cutters are arranged coaxially with a gap therebetween, are arranged in parallel in the axial direction. Slit-formed metal sheet in which a large number of staggered slits are formed by passing the non-slit-formed metal sheet only while the peripheral edge portions of the disk cutters of the two disc cutter rolls are alternately inserted into the gaps and meshed with each other. Then, in the method of manufacturing a grid for battery electrode plates in which the slits of the slit-formed metal sheet are expanded in a grid, the slit-formed metal sheet that passes between the two disc cutter rolls is used as the first disc. The first disc cutter roll is transported along the peripheral surface of the cutter roll, and the first disc cutter roll is based on the axis plane connecting the axis of the first disc cutter roll and the axis of the second disc cutter roll. 5 to 90 degrees times When, characterized in that unloading pulled out tangentially slit-formed metal sheet from the circumferential surface position of the first disc cutter roll.
[0011]
According to the invention of claim 1, the slit-formed metal sheet is conveyed along the peripheral surface of the first disc cutter roll after passing between the first and second disc cutter rolls. The In other words, conventionally, the drawing-out angle of the slit-formed metal sheet passing between the two disc cutter rolls is connected to the axis of the first disc cutter roll and the axis of the second disc cutter roll. Since the direction was perpendicular to the axis, the slit-formed metal sheet was simultaneously pulled away from the peripheral surfaces of these two disc cutter rolls, resulting in an unstable state. However, in the invention of claim 1, the slit-formed metal sheet is first conveyed along the peripheral surface of the first disc cutter roll, so that it is reliably pulled away from the peripheral surface of the second disc cutter roll. And when the first disc cutter roll is rotated 5 to 90 degrees with respect to the axial center plane connecting the axis of the first disc cutter roll and the axis of the second disc cutter roll, Since the slit-formed metal sheet is drawn in the tangential direction of the first disc cutter roll, it can be smoothly pulled away from the first disc cutter roll. That is, by pulling apart the metal sheet step by step from the peripheral surfaces of the two disc cutter rolls, the metal sheet does not become unstable and does not cause undulation or vibration.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
FIG. 1 shows an embodiment of the present invention and is a front view showing a slit forming process of a rotary expander. In addition, the same number is attached | subjected to the structural member which has a function similar to the prior art example shown in FIGS.
[0014]
This embodiment demonstrates the slit formation process in the rotary type expander for producing the grid | lattice body used for the electrode plate of the lead storage battery similar to a prior art example. The configuration of the two disc cutter rolls 1 and 2 used in this slit forming step is the same as that of the conventional example. That is, these disc cutter rolls 1 and 2 are formed by coaxially arranging a large number of disc cutters 3 and 4 each having crests 3a and 4a formed on the periphery of a metal disc.
[0015]
In this embodiment, the disc cutter rolls 1 and 2 are not disposed directly above and directly below as in the conventional example, but are disposed at the upper and lower positions in an oblique direction as shown in FIG. That is, the axis O ₁ that is the center of the rotation axis of the first disc cutter roll 1 and the axis O ₂ that is the center of the rotation axis of the second disc cutter roll 2 are arranged in parallel horizontal directions. However, the axis O ₂ of the lower disk cutter roll 2 is not directly below the axis O ₁ of the upper disk cutter roll 1 but is inclined to the front side in the traveling direction of the lead sheet 5 by an angle θ. Is arranged. In other words, the first disc cutter roll is rotated by 5 to 90 degrees with respect to the axis plane connecting the axis of the first disc cutter roll and the axis of the second disc cutter roll. At this time, the slit-formed metal sheet is pulled out in the tangential direction from the circumferential surface position of the first disc cutter roll and is carried out. However, these axial centers O ₁ and O ₂ are spaced apart from each other by the distance between the peripheral edges of the disk cutters 3 and 4 alternately entering the gaps, more precisely, the valleys slightly overlap, as in the conventional example. It arrange | positions so that it may become such an interval distance.
[0016]
The slit-unformed lead sheet 5 is inserted between the disk cutter rolls 1 and 2 from the upper left side of FIG. 1 and is drawn out and carried out in the right horizontal direction. At this time, the lead sheet 5 is parallel to the axial centers O ₁ and O ₂ of the disk cutter rolls 1 and ₂ and along a reference tangential plane orthogonal to a plane connecting these axial centers O ₁ and O _2. It is preferable to insert at an angle. This is because the reference tangential surface is a common tangential surface of both peripheral edges of the disk cutter rolls 1 and 2, and the lead sheet 5 is inserted between the upper and lower disk cutter rolls 1 and 2 along this. This is because the processing of the slit 5a by the upper and lower disk cutters 3 and 4 can be started almost simultaneously on both sides of the lead sheet 5. However, if only the crests 3a, 4a of the disc cutters 3, 4 of either one of the disc cutter rolls 1, 2 may contact the surface of the lead sheet 5 immediately before insertion, The lead sheet 5 can be inserted between the disc cutter rolls 1 and 2 at an inclined angle. For example, if this lead sheet 5 is inserted between the disc cutter rolls 1 and 2 from the left horizontal direction, the lower surface of the lead sheet 5 is first placed on the peak portion 4 a of the disc cutter 4 of the lower disc cutter roll 2. In the abutted state, the sheet is transported by an angle θ along the peripheral surface of the lower disk cutter roll 2, and the slit 5 a is processed by the disk cutters 3, 4 of the upper and lower disk cutter rolls 1, 2 immediately before this. Will be started.
[0017]
When the slits 5 a of the lead sheet 5 are processed by the disk cutters 3 and 4 of the upper and lower disk cutter rolls 1 and 2, the lead sheet 5 is once placed on the peripheral surface of the first disk cutter roll 1. Along the angle θ. And when it reaches the lower end of the peripheral surface of the upper disk cutter roll 1, it is pulled out in the tangential direction, that is, the right horizontal direction, and is carried out. In other words, the slit-formed lead sheet 5, the first disc cutter roll 1, connecting the axis O ₁ of the first disc cutter roll 1 and the axis O ₂ of the second disc cutter roll 2 When rotated by θ degrees with respect to the axial center plane, the first disk cutter roll is drawn in the tangential direction from the peripheral surface position. The slit-formed lead sheet 5 in which the slit 5a has been formed in this way is expanded in the width direction in a development process (not shown) that is a post-process of the rotary expander, so that the slit 5a has a grid shape. Thus, a lattice-like lattice body used for the electrode plate of the lead storage battery is produced.
[0018]
As a result, according to the present embodiment, when the lead sheet 5 passes between the upper and lower disk cutter rolls 1 and 2 and the slits 5a are formed by the disk cutters 3 and 4, the upper first Since the sheet is conveyed by an angle θ along the peripheral surface of the disc cutter roll 1, the disc cutter roll 1 is reliably pulled away from the peripheral surface of the lower second disc cutter roll 2. That is, in the lead sheet 5, between the disc cutter rolls 1 and 2, the crests 3a and 4a of the upper and lower disc cutters 3 and 4 penetrate through both surfaces and bite between the slits 5a. However, when the lead sheet 5 is conveyed along the peripheral surface of the upper disc cutter roll 1, the peak portion 4a of the disc cutter 4 of the lower disc cutter roll 2 is forcibly interposed between the slits 5a. Will be pulled from. Further, since the lead sheet 5 conveyed along the peripheral surface of the upper disc cutter roll 1 reaches the lower end of the peripheral surface, it is pulled out in the right horizontal direction. It is only necessary to pull out from between the slits 5a, and it is smoothly pulled out without being unstable. Therefore, the lead sheet 5 is separated from the peripheral surfaces of the upper and lower two disc cutter rolls 1 and 2 in order, so that the lead sheet 5 does not become unstable and does not wavy or vibrate. .
[0019]
In FIG. 1 of the above embodiment, the first disc cutter roll is based on the axial center plane connecting the axis of the first disc cutter roll and the axis of the second disc cutter roll. When rotated about 30 degrees, the slit-formed metal sheet is illustrated as being drawn out from the circumferential surface position of the first disc cutter roll in the tangential direction and carried out, but this angle θ sufficiently exceeded 0 °. Any number may be used as long as it is, and practically, it is preferably 90 ° or less.
[0020]
In the above embodiment, the disk cutter rolls 1 and 2 are disposed obliquely at an angle θ in order to pull out the lead sheet 5 in the horizontal direction. As long as the distance between O ₁ and O ₂ is maintained, any positional relationship may be used. For example, when the disc cutter rolls 1 and 2 are arranged directly above and below as in the conventional example, The lead sheet 5 may be drawn out and carried out upward or downward rather than in the right horizontal direction.
[0021]
Moreover, in the said embodiment, while the disk cutters 3 and 4 of the disk cutter rolls 1 and 2 form many peak parts 3a and 4a in a peripheral part, it is in the trough part between these peak parts 3a and 4a. Although the open groove is formed alternately on both disk surfaces, if the lead sheet 5 is formed with staggered slits 5a, the configuration of the peripheral edge of the disk cutters 3 and 4 is as follows. It is not limited.
[0022]
Moreover, although the said embodiment demonstrated the case where the lead | read | reed sheet | seat 5 which consists of lead and a lead alloy was processed, and the grid body used for the electrode plate of a lead storage battery was manufactured, the same grid object was used for the current collecting base material of an electrode plate. Can be applied to any battery as well as a lead-acid battery, and a grid body can be manufactured using a metal sheet of an appropriate material according to the type of the battery. Furthermore, although the upper disc cutter roll and the first disc cutter roll are used, and the lower disc cutter roll and the second disc cutter roll are used, the opposite may be used.
[0023]
【Example】
Table 1 shows the results of comparing the slit 5a formed in the lead sheet 5 by the slit forming process of the rotary expander described in the above embodiment and the slit forming process of the rotary expander shown in the conventional example.
[Table 1]

Here, the lead sheet 5 is always pulled out in the right horizontal direction and sent to the unfolding process, and by changing the angle θ between the axis plane connecting the axis centers of the disc cutter rolls 1 and 2 and the horizontal plane, A comparison was made between a conventional example in which the lead-out angle θ of the lead sheet 5 was 0 ° and an example in which the lead sheet 5 was changed from 5 ° to an angle exceeding 90 °.
[0024]
Displacement meters in the vertical direction are installed on the disk cutter rolls 1 and 2 to measure the average vibration width at the time of forming the slit 5a. The vibration width ratio for the example was examined. Further, the lattice breakage ratio for each example of the carry-out angle θ when the conventional example was set to 100 for the lattice body that was developed to a predetermined amount after the slits 5a were formed in the lead sheet 5 was examined. Furthermore, a lead body (JIS type 55D23) is used as a positive electrode plate for a grid body produced by adjusting the processing speeds of the slit forming step and the unfolding step so as to prevent breakage of the grid, filling the active material, aging and drying. The amount of corrosion of the lattice after the JIS overcharge test was executed for one month was investigated, and the corrosion amount ratio for each example of the carry-out angle θ when the conventional example was set to 100 was investigated. In each case, the lead storage battery used a conventional negative electrode plate, and a separator mainly composed of microporous polyethylene was interposed between the electrode plates.
[0025]
As a result of the above comparative test, the average vibration width ratio of the disc cutter rolls 1 and 2 and the fracture ratio of the lattice are such that the carry-out angle θ is large when the carry-out angle θ of the lead sheet 5 is 90 °. Good results were obtained. However, with respect to the corrosion amount ratio of the grid, the example in the case where the carry-out angle θ is 45 ° to 60 ° has the minimum value, but even when the carry-out angle θ is 90 °, the amount of corrosion is smaller than that in the conventional example. Is decreasing. In addition, when the carry-out angle θ of the lead sheet 5 increases in this way, the corrosion amount ratio of the lattice increases. As the carry-out angle θ increases, the lead sheet 5 moves along the peripheral surface of the upper disc cutter roll 1. Since it is conveyed for a long time, it is thought that this is because the lead sheet 5 is greatly curved during this time and distortion increases.
[0026]
【The invention's effect】
As apparent from the above description, according to the battery electrode plate grid manufacturing method of the present invention, after the metal sheet passes between the two disk cutter rolls, the circumference of these disk cutter rolls is increased. Since they are pulled away from the surface step by step, the unloaded slit-formed metal sheet becomes unstable and does not cause undulation or vibration.
[Brief description of the drawings]
FIG. 1 is a front view showing a slit forming process of a rotary expander according to an embodiment of the present invention.
FIG. 2 is a front view showing a conventional example and showing a slit forming process of a rotary type expander.
FIG. 3 shows a conventional example, and is a front view showing a state in which a lead sheet passing through between two disc cutter rolls is drawn out in a wavy manner in a slit forming process of a rotary expander.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 1st disc cutter roll 2 2nd disc cutter roll 3 Disc cutter 3a Mountain part 4 Disc cutter 4a Mountain part 5 Lead sheet 5a Slit

Claims (1)

A first disk cutter roll and a second disk cutter roll each having a large number of disk cutters arranged coaxially with a gap are arranged in parallel in the axial direction, and the two disk cutter rolls A slit-formed metal sheet in which a large number of staggered slits are formed by passing the non-slit-formed metal sheet only while the peripheral edge of each disk cutter is alternately inserted into the gap and meshed, and then the slit-formed metal In the manufacturing method of the battery electrode plate grid that expands the slits of the sheet in the grid,
The slit-formed metal sheet passing between the two disc cutter rolls is conveyed along the peripheral surface of the first disc cutter roll, and the first disc cutter roll is used as the first disc cutter roll. The peripheral surface position of the first disc cutter roll when the slit-formed metal sheet is rotated by 5 to 90 degrees with respect to the axis plane connecting the axis of the roll and the axis of the second disc cutter roll. A method of manufacturing a grid for a battery electrode plate, wherein the battery electrode plate is pulled out in a tangential direction and carried out.

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