JPS5852304B2 - Continuous manufacturing method for grids for lead-acid batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves moving a belt-shaped sheet made of lead or a lead alloy in its longitudinal direction, and connecting a three-step mesh processing machine to the belt-shaped sheet at regular intervals. The present invention relates to a continuous manufacturing method for obtaining an X-band metal-like grid for lead-acid batteries with good workability by forming irregularities and notches in the (vertical) direction, and then stretching the sheet in the width direction in the next step.

The method for manufacturing expanded metal grids for lead-acid batteries is to install a large number of cutters and dies on the left and right sides corresponding to the processing points of the strip sheet, and sequentially cut the cutters from the left and right edges toward the center. U.S. Pat. No. 3,853,626 and U.S. Pat. No. 3,867,200 disclose a method of obtaining an expanded metal-like lattice body having a diamond-shaped mesh using a guillotine-type processing machine that processes the expanded metal shape by applying incisions and stretching by vertical movement. No. 3,890,160 and No. 4,102,024.

Compared to previous methods, these methods are superior in terms of flattening of the lattice portions that form the boundaries between meshes and workability, but they require cutters and dies to cut into the strip sheet and cut it in the width direction. Since the movement of the sheet temporarily stops when the sheet is expanded or stretched, it has not been fully satisfactory for manufacturing lattice bodies with good mass productivity.

Also, of the kinetic energy given to move the cutter up and down with a constant stroke, the proportion of energy spent on reciprocating motion is large compared to that used for machining, and this is an inevitable result of the reciprocating type. It can also be said to be a flaw.

In addition, the vibration and noise generated by the device during vertical movement are large.
It cannot be said that it is fully suitable for high-speed exercise.

The present invention further improves such conventional methods and provides a continuous manufacturing method for expanded lead-acid battery lattices with good workability and mass productivity.

The continuous manufacturing method of the lattice body for lead-acid batteries of the present invention involves moving a strip-shaped sheet made of lead or lead alloy along its longitudinal direction, and moving the moving strip-shaped sheet in three steps (steps) using a petal-shaped cutter and a die. ) is used to make cuts in the strip sheet by applying unevenness, incisions, and stretching in the perpendicular direction to the strip sheet, and then cuts the lead sheet with the cuts evenly in the width direction on the left and right sides. It is characterized by being stretched into an expanded metal shape with a diamond-shaped mesh, and then flattened.

Conventionally, a method was invented in which a lead or lead alloy sheet was cut and then pulled from side to side in the next process. Variations occurred in the dimensions of the mesh, and distortion occurred in the knots, causing the knots to break.

The main object of the present invention is to manufacture an expanded lattice body of lead or lead alloy sheets continuously without stopping, with good workability, using a mesh processing machine consisting of a petal-shaped cutter and a die.

Other objects of the invention will become clear - from the following drawings and from the detailed description of the examples.

Fig. 1 is a sketch of the entire expanded band processing machine in the manufacturing method of the present invention, similarly Figs. 2 and 4 are front views of the mesh processing machine, and Figs. 3 and 5 are detailed views of the petal cutter and die. FIG. 6 is a top view and a side view of the belt-shaped sheet after it has been textured and notched.

In these figures, 1 is lead or a lead alloy, e.g. Pb
-0,2wt% Ca alloy, Pb -4,0wt%
This is a coiler in which a band-shaped sheet 2 made of Sb alloy, Pb -0,1w and Ag alloy is wound up.

There is a slight difference in the thickness of these band-shaped sheets 2 when they are processed into an expanded anode plate grid body and when they are made into a cathode plate grid body, but the initial thickness is 0. It is sufficient to keep the temperature between .5 and 1.2.

In addition, the width of the plate is 108mm, the width of the plate is 108mm, the width of the plate is 108cm, the width of the plate is 108mm, the width of the plate is 108mm, the width of the plate is 108cm, the width of the plate is 108cm, the width of the plate is 108mm, the width of the plate is 108mm, the width of the plate is 108mm, the width of the plate is 108cm, the width of the plate is 108mm, the width of the plate is 108cm, the width of the plate is 10mm When obtaining 20 mm electrode plates from both left and right sides with the center of the strip sheet as a border, the width may be 521 nr/L.

This strip-shaped sheet 2 is automatically pulled out by the coiler 1 and introduced into the expanding processing device E.

In order to adjust the position in the width direction of the belt-like sheet 2 introduced into this processing device E, a freely rotating roll 3 having two left and right flanges with a distance determined according to the width of the belt-like sheet is provided, and then three steps are performed. (Stage) Mesh processing machine 4゜4', 5. consisting of a pair of upper and lower processing rolls equipped with a petal-shaped cutter and a die. s', 6. 6', the belt-shaped lead sheet is processed with unevenness in the thickness direction of the sheet itself, and at the same time, notches are provided.

A method for forming cuts while deforming this belt-shaped sheet into irregularities will be described in detail later.

After the belt-shaped sheet is roughened and cut by a three-step mesh processing machine, the sheet is stretched in the width direction by a stretching device 7 to form a mesh at the cut portions.

Next, a pair of upper and lower press rollers 9, 9' with smooth surfaces are set at intervals of 0.3 to 0.5 times smaller than the mesh sheet thickness.
By passing through the gap, distortions, deformations, bends, and processing edges caused during mesh processing and stretching are flattened, and a continuous band-shaped expanded grid body 10 is provided.

Each of the mesh processing machines 4 to 6, which is a feature of the present invention, is constructed in principle as shown in FIGS. 2 and 4 and 3 and 5.

In other words, each petal-shaped cutter and die are cut so that the unevenness and incisions to be processed are at the desired position on the band-shaped sheet.
The petal-shaped cutter 1 is provided alternately on the same axis.
2a and 12b have cutting blades 14a and 14b corresponding to the mesh size of the expanded lattice body to be obtained.

The cutting blades 14a and 14b are arranged in an even number at equal intervals around the circumference, and their shape is an isosceles triangle to form a rhombic mesh, and the apex has an arc with a radius of 0.5 to 1.0. It is set up.

Moreover, the material is high speed steel or die steel.

The petal-shaped dies 13a, 13b have semicircular cutout portions 15a, 15b in accordance with the size of the mesh and the shape of the cutting blade of the expanded lattice body to be obtained.

The missing portions 15a, 15b are arranged in an even number at equal intervals with respect to the circumference, and are always in synchronization with the cutting blade of the petal-shaped cutter described above via the band-shaped sheet.

That is, in the pair of upper and lower mesh processing machines, the number of cutting blades of the petal-shaped cutter and the number of missing parts of the petal-shaped die are the same, and at the same time, they are fixed to the upper and lower rotating shafts so as to correspond synchronously.

Note that the material of the petal-shaped die is high-speed steel or die steel, similar to the cutter.

As shown in FIGS. 2 and 3, the mesh processing machine 4 in the first step (stage) has the cutting blade of the petal-shaped cutter and the number of blades of the defective part of the petal-shaped die as shown in FIGS. 4 and 5. Twice the number of blades is required compared to a three-step mesh processing machine.

In other words, the unevenness and cuts processed into the belt-like sheet by the mesh processing machine in the first step are as shown in Figure 2.3, the width of the cuts is 0.5 to 1.2 m, and the length is the diameter of the mesh make me ashamed

The width of the cut obtained by the mesh processing machine in the second process (stage) is 1.0 to 2.4 mm, as shown in Figure 4-5, and the length is equal to the length of the major diameter part of the mesh. , and further the third process (stage)
The processing dimensions are also the same as in the second process, but the permutation in the width direction of the belt-shaped sheet with respect to the cuts obtained in the second process is as shown in Figure 6. ．．
In addition to making the two holes out of center (out of phase), the permutation in the longitudinal direction is also out of center (out of phase) by % of the cut pitch.

Here, to further specifically explain the manufacturing method of the present invention, the belt-shaped sheet is protruded in the thickness direction of the belt-shaped sheet and extends in the width direction by the mesh tensioning machine in the first step, as shown in FIG. Like concave, convex, concave.

When convex, ......, concave drawing is performed using the engaging portion of the processing rolls shown in Figures 2 and 3, the concave and convex process is simultaneously carried out as shown at 21 in Figure 6, and the boundary between the two A notch will be made in the section.

When the mesh processing machine further rotates, the strip-like sheet is moved in the longitudinal direction at equal pitches by the upper and lower engagement forces of the processing rolls, and the same processing as described above is continuously performed on a new sheet surface.

The mesh processing machine for the second process has the same processing principle as the first process, but as mentioned above, the number of cutting blades of the petal cutter and die is half that of the first process, so the cutting blade itself is It is large and is equivalent to the long axis of the mesh to be obtained, and the number of petal-shaped cutters and dies is one less than half of that in the first step, and the center of the strip or sheet is made as shown in 22 in Figure 6. Align the positions of the side cuts and create unevenness and cuts.

This means that a single machine in the width direction overlaps the unevenness and cut positions processed by the mesh processing machine in the first step, but considering processing accuracy and material stress,
Since it is not preferable to perform deep drawing in one step, an operation is performed in which the deep drawing is overlapped with the first step.

Similarly, the mesh processing machine for the third process has the same number of cutting blades and the number of cutters and dies as the mesh processing machine for the second process, but as shown in 19 in Fig. 6, both sides of the strip sheet are By aligning the incision positions with those in the first step, uneven processing and incisions are performed on the portions that will not be processed in the second step.

It overlaps with the roughening process in the first step and the notch part.

This is the same purpose as the second step.

If you want to perform these processes continuously, if you drive the mesh processing machines for the 1st to 3rd processes at the same rotation speed, the complete unevenness processing and cut will be completed when the strip sheet passes through the mesh processing machine for the 3rd process. This enables high-speed, high-precision continuous production without the need for stopping.

After this, the coolet type stretching machine 7a shown in FIG.

7b, the diamond-shaped mesh 20 is formed by continuously stretching the belt-shaped sheet 19 which has been processed with unevenness and cuts in its width direction.
is formed, but the distortion, deformation, and
The curves are corrected to be flat by a pair of upper and lower press rollers shown in FIGS. 1, 9 and 9', and a complete expanded grid is provided.

After this, paste active material 25 is processed using an existing paste machine.
Fill the diamond-shaped mesh 20, dry, ripen, cut and divide into pieces, as shown in Fig. 9, with a height of 110 rpm and a width of 10
An electrode plate having a current collecting portion of 8 mm and a length of 20 TrrrrL is obtained.

In this figure, 23 is a lattice rib forming the rhombic mesh 20, 24° 24' is a frame rib, 25 is a paste active material,
26 is a current collecting section.

In the manufacturing method of the present invention, in which the mesh is continuously formed while moving the lead or lead alloy strip sheet,
Without stopping the movement of the strip sheet, the petal-shaped cutter makes cuts in the strip sheet by making unevenness that protrudes in the thickness direction of the sheet, and then the sheet is pulled uniformly from side to side at high speed. It is possible to create an expanded lattice.

Therefore, the conventional guillotine method, which uses a cutter and die that move up and down, has an IQ of 5 m/min. ? The mesh forming speed, which was limited to Z, can be formed at a speed of 40 m to 60 m per minute with the petal-shaped rotary cutter according to the present invention.

[Brief explanation of drawings]

Fig. 1 is a sketch of the entire lattice manufacturing apparatus used in the manufacturing method of the present invention, Fig. 2 is a front view of the mesh processing machine in the first step,
Fig. 3 is a cross-sectional view of the machine, Fig. 4 is a front view of the mesh processing machine for the second and third processes, Fig. 5 is a cross-sectional view of the machine, and Fig. 6 A and B show the processing order of unevenness and cuts. Figure 7 is a sketch showing the unevenness and cut processing, Figure 8 is an explanatory diagram showing the stretching method,
FIG. 9 is a diagram showing a storage battery electrode plate manufactured by the manufacturing method of the present invention. 1...Coiler, 2 band-shaped sheet, 4,4'-...
...Mesh processing machine for the first process, 5,5'-...
Mesh processing machine for the second process, 6, 6'-...Mesh processing machine for the third process, 7a, 7a'p 7b, 7b'-
...Stretching machine, 8...Band-shaped sheet during stretching, 9,9'...Thickness regulating roll, 10...
... Ex band metal, 'f2a, 12b...
・Petal cutter 13a, 13b...petal die, 14a, 14b...cutting blade, 15
a. 15b... Defect part, 18a, 18b, 18a'
. 18b'-...Rotating shaft, 19...Band-shaped sheet after processing, 20...Band-shaped sheet after stretching,
21... Processing part by the mesh processing machine of the first step,
22... Processing part by the mesh processing machine of the second process,
23... Lattice bone, 24... Frame bone, 25
...Active material, 26... Current collector.

Claims (1)

[Claims] 1. A belt-shaped sheet made of lead or lead alloy is moved in its longitudinal direction, and a mesh processing machine equipped with a plurality of petal-shaped cutters and dies is used to continuously position the belt-shaped sheet at a desired position. A continuous lattice body for a lead-acid battery, characterized in that the sheet is given unevenness and notches in the thickness direction, and then the strip-shaped sheet is stretched in the width direction to form an expanded lattice, and then flattened. Manufacturing method. 2. Claim No. 2, wherein the mesh processing machine comprises a pair of upper and lower processing rolls sandwiching the strip sheet, each of which has a plurality of petal-shaped cutters and dies coaxially provided corresponding to the processing locations of the strip sheet. A continuous manufacturing method for a lead-acid battery grid according to item 1. 3. The continuous manufacturing method of a lead-acid battery lattice body according to claim 1, wherein a three-step mesh processing machine is provided in the traveling direction of the belt-shaped sheet.