JPS5853473B2 - Method for manufacturing grids for lead-acid batteries - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a manufacturing method for producing grid bodies for lead-acid batteries by punching and expanding belt-shaped sheets made of lead or slip metal. An object of the present invention is to provide a manufacturing method that can efficiently manufacture a high-quality grid body for a lead-acid battery.

As is well known, 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 move from the left and right edges to the center. Another method is to obtain a lattice with a diamond-shaped mesh using a guillotine-type processing machine that processes the material into an expanded shape by making incisions and elongation by moving the cutter up and down.

Furthermore, there is also known a processing method in which a strip-shaped sheet is press-cutted while continuously moving using a press-cutting die processed into a desired shape to form a grid body for a lead-acid battery.

Both of these manufacturing methods have in common that a strip sheet made of lead or slip metal is used as the processing material, and that the sheet is processed while being moved regularly in the longitudinal direction of the strip sheet by a fixed size. In order to obtain a high-quality lattice body, it is required that the dimensional accuracy of movement of the supplied belt-shaped sheet is high.

For example, in extended band processing, if you want to obtain a diamond-shaped mesh at intervals of 1101n, feed 10wn of a strip sheet at the same time as the cutter rises, and then the cutter descends and processes the desired position. Ru.

This processing operation is carried out continuously, but if the feeding dimension of the strip sheet, that is, the movement dimension of 10 m, is not accurate, the mesh shape will become irregular as a result, and a high quality expanded metal grid will not be possible. You will not be able to obtain it.

In other words, it can be considered that the feeding accuracy determines the quality of the grid.

In conventional processing, one of the factors that causes errors in the movement dimension of the belt-like sheet is that the surface of the belt-like sheet is extremely smooth, so it is difficult to clamp it in the sizing feeder section 1 as shown in Figures 1 and 2. It has been found that when the belt-shaped sheet 5 is gripped by the section 2 and fed to a fixed length, the belt-shaped sheet 5 slips, causing errors.In order to prevent this slip and obtain accurate feeding dimensions, improvements to the device have been made. Various additions have been made, but no satisfactory results have yet been achieved.

In addition, as a method for producing a belt-shaped sheet, an ingot made of lead or a lead alloy is rolled into a constant thickness by installing a plurality of pair of roller rolling mills whose intervals are gradually reduced, and passing the ingot sequentially through these mills. Since the belt-shaped sheet is produced, the surface of the belt-shaped sheet is extremely smooth as described above, and the frictional resistance with the clamp portion 2 of the sizing feeding device is small, further promoting the occurrence of feeding errors.

In these figures, numeral 3 denotes a part of the cutter of the expander processing machine, 3' is a die fixing table, 4 is an undulation correction roller, and 6 is a continuous strip-shaped grid.

The present invention provides an effective method for appropriately increasing the frictional resistance between the clamp section 2 and the strip-shaped sheet in this fixed-size feeding device and supplying the strip-shaped sheet with accurate dimensions to the expansion processing machine 3. It is.

Here, to explain a specific example, the conventional belt-shaped sheet shown at 5 in FIGS. 1 and 2 is a roll-rolled strip made of lead or lead alloy with a thickness of 0.5 to 1.2 km. However, the flatness of the surface is O~50μ based on the thickness difference.
degree and extremely smooth.

In most cases, this smooth state is punched and expanded into grids for lead-acid batteries, and the constant dimensional feed accuracy is low. For example, in expanded band processing, the pitch dimension in the longitudinal direction of the mesh is If it is desired to be 10 mm, a dimensional error of about 5 to 10%, that is, 0.5 to 1.0, occurs.

In order to solve these problems, in the present invention, the surface of one or both sides of the belt-shaped sheet as described above is subjected to uneven processing or grooved processing as shown in FIGS. 3 to 5, and then
By introducing it into the fixed size feeder 1 shown in Figures 1 and 7, grasping it with the clamp part 2, and feeding it to the expand processing machine 3, it can be used for uneven processing or thread groove processing with the clamp part 2 of the fixed size feeder. The frictional resistance with the surface of the processed strip sheet 80 is moderately increased compared to when using a strip sheet with a smooth surface, preventing slippage between the clamp section 2 and the sheet surface 8, and ensuring accurate feed dimensions. is obtained.

The error in the pinch dimension in the longitudinal direction of the mesh of the lattice body expanded using the strip sheet according to the present invention is reduced to about 0 to 2 factors, that is, 0 to 0.2 rrrm when a pitch of 10 wrL is desired. Even from this fact, it can be said that it is possible to obtain a high-quality lattice body with higher precision compared to conventional manufacturing methods.

Here, the uneven processing or the grooved processing performed on the surface of the belt-shaped sheet will be explained in detail.

9a in Figure 3. A pair of knurling rolls shown in 9b, each having a grooved surface, are fixed with a mutual interval of 0.2 to 0.61 rtrn smaller than the thickness of the strip sheet 5. At intervals, strip sheet 5
By passing the strip, the grooves shown in 8 are continuously carved on the surface of the belt-shaped sheet with a maximum groove depth of 0.3 rrrx.

Further, to achieve the object of the present invention, two pairs of wire brush rolls 10a rotating in an intersecting state as shown in FIG. 4 are provided.

10b, 10c, and 10d are pressed against the surface of the belt-shaped sheet 50 to form the grooves 11 in a fine lattice shape using a roll brushing method and sandblasting devices 12a and 12b as shown in FIG. Spray it on,
A sandblasting method or the like that provides fine irregularities 14 on the surface of the belt-shaped sheet 5 is effective.

Now, in the present invention, by the above-mentioned means, a smooth belt-shaped sheet whose surface has been subjected to uneven processing or grooved processing is guided to the fixed-dimension feeding device 1 shown in FIG. At this position, the belt-shaped sheet is clamped from above and below by the clamp parts 2a and 2b, which are opened and closed by the air cylinder 7, and is moved and supplied to the Y position in the figure under the control of stoppers 15 and 16.

After this, the air cylinder 1 is operated in the opposite direction to release the clamping parts 2a and 2b, and the clamp parts return to the X position while remaining open. By repeating this cycle, the fixed size pieces are introduced into the expansion band processing machine 3. To go.

Therefore, in the case of a belt-shaped sheet with a smooth surface that has been used so far, it is necessary to tighten it with the clamp parts 2a and 2b and move it from the X position to the Y position.
Because the frictional resistance between the clamp part and the surface of the strip sheet is small when moving it into position, slipping occurs and errors in the feed dimension occur.However, in the present invention, this problem has been solved as described above. By applying uneven processing and grooved processing to the surface, we were able to appropriately increase the frictional resistance between the clamp part and the surface of the strip sheet, prevent slipping, and obtain accurate feed dimensions.

In this way, it is possible to manufacture high-quality expanded metal gratings with higher precision.The grids are then filled with a paste-like active material, cut into desired dimensions, and then used in lead-acid batteries. Although it is intended to be used as an electrode plate, even at this point, uneven processing and grooves are left on the electrode plate surface, but the depth of these is 0.3 rrrm or less, and it is relative to the thickness of the grid. The depth of these unevenness or grooves is at most 0.3 rrrm, and normally during these processing, the belt-shaped sheet escapes in the thickness direction and the depth becomes shallow.
It is formed on a small scale on the surface layer of the sheet.

Therefore, it has been found that there is no prohibition in terms of electrode plate production or battery performance, and on the contrary, the retention effect of the paste-like active material is improved by the unevenness and grooves.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an apparatus for manufacturing a continuous band-shaped lattice body by conventional expanded processing, FIG. 2 is a side view thereof, and FIGS. 3 to 5 are FIG. 6 is a perspective view of an apparatus for carrying out the manufacturing method of the present invention, FIG. 7 is a side view thereof, and FIG. FIG. 2 is an explanatory diagram of a fixed-dimension feeding device for dimensional movement. 1... Fixed size feeder section, 2... Clamp section, 3... Extended band processing machine, 5...
...Band-shaped sheet, 6°6'...Continuous band-like lattice body, 8, 11, 14...Striped grooves or unevenness.

Claims (1)

[Scope of Claims] 1. A method for manufacturing a lead-acid battery lattice body by punching and expanding a belt-like sheet made of lead or slip metal, in which the surface of the belt-like sheet is processed in advance with irregularities or grooves. 1. A method for producing a grid for lead-acid batteries, which comprises applying the material, followed by punching and expanding. 2 The uneven processing or the grooved processing is performed by a knurling method,
The method for manufacturing a grid for a lead-acid battery according to claim 1, which is carried out by any one of the group consisting of a roll brushing method and a sandblasting method.