JPH08298123A - Continuous cutting method for strip electrode plate - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a continuous cutting method for a strip electrode plate, which automatically detects and corrects the deviation of the cutting position of the strip electrode plate. [Structure] A strip-shaped electrode plate 10 having a large number of deformed portions 12 provided at predetermined intervals is run, and the strip-shaped electrode plate 10 is formed into an electrode plate of the same shape by a rotary cutter 30 in a fixed position.
11 In the method of cutting continuously, the cut electrode plate
The distance t from the tip of 11 to the deformed portion 12 is automatically measured, and then the deviation (t−T) between the measured distance t and the standard distance T
Based on, the cutting position of the strip electrode plate 10 is automatically corrected. [Effect] The strip-shaped electrode plate 10 can be efficiently and continuously cut into the electrode plate 11 having a normal shape without requiring manpower. Further, since the deviation is automatically measured, the feedback becomes faster and the yield is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous cutting method for strip-shaped electrode plates, which is useful for manufacturing electrode plates for storage batteries for automobiles.

[0002]

2. Description of the Related Art An electrode plate used in a storage battery for automobiles is a rotary cutter arranged in front of a conveyor, which is formed by filling a long grid substrate with an active material to form a belt-shaped electrode plate, which is conveyed and conveyed. It is manufactured by continuously cutting to a predetermined length. On one side edge of the strip-shaped electrode plate, a large number of ears (deformed portions) are provided so as to project at predetermined intervals. In this strip-shaped electrode plate, the ears are provided at predetermined portions on the side edges of the electrode plate. The individual electrode plates are cut so that they are located one by one. The cutting length of the strip electrode plate is usually adjusted to the distance between the blades of the rotary cutter by making the traveling speed of the conveyor and the peripheral speed of the rotary cutter the same.

Conventionally, the cutting of the strip electrode plate is performed as shown in FIG. That is, the ear sensor 60 for detecting the passage of the ear 12 of the strip electrode plate 10 is arranged at a predetermined position on the conveyor 20, and the blade sensor 61 for detecting the passage of the blade 31 of the rotary cutter 30 is arranged on the circumference of the rotary cutter 30. Place it in the specified place. Both sensors 60, 61 are installed at positions where normal cutting is performed when both pulses are turned ON at the same time. When the timings of both pulses ON are shifted, the traveling speed of the conveyor 20 or the rotary cutter 30 is set. Change the rotation speed of to temporarily correct it.

More specifically, the pulses of the ear sensor 60 and the blade sensor 61 and the line speed detected by the tacho generator 43 are input to the controller 44. When the pulse ON timings of both sensors 60, 61 are deviated, the length of the deviation is calculated from the time difference and the traveling speed of the conveyor 20, and the stepping motor 45 is rotated at a rotational speed proportional to the deviation length. Rotate in either direction for a certain period of time. The gear ratio of the transmission 46 is temporarily increased / decreased in proportion to the rotation speed, whereby the rotation speed of the rotary cutter 30 is temporarily changed and corrected so that the pulses ON of both the sensors coincide with each other. In the figure 62 is a conveyor 20 and a rotary cutter
It is a synchronous motor for driving 30.

[0005]

By the way, since the traveling speed of the strip-shaped electrode plate is delayed by the width of the blade in the initial stage of cutting in which the blade comes into contact with the strip-shaped electrode plate, as shown in FIG. A part of the plate 10 that contacts the blade 31 is raised.
As a result, the strip electrode plate 10 gradually shifts on the conveyor,
The strip electrode plate 10 will not be cut at a normal position. Such a deviation of the cutting position is corrected by the operator manually measuring the shape of the electrode plate 10 after cutting, and adjusting the position of the blade sensor of the rotary cutter 30 when the deviation exceeds a predetermined value. Therefore, it takes a lot of time and labor to cut the electrode plate,
In addition, many defective products were produced during the measurement and adjustment, and the yield decreased. It is an object of the present invention to provide a method for continuously cutting a strip electrode plate that automatically detects and corrects a deviation of the cutting position of the strip electrode plate.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a strip-shaped electrode plate provided with a large number of deformed portions at predetermined intervals is made to travel, and the strip-shaped electrode plates having the same shape are individually moved by a rotary cutter at a fixed position. In the method of continuously cutting the electrode plate, the distance t from the tip of the cut electrode plate to the deformed portion is automatically measured, and then the deviation (t−T) between the measured distance t and the standard distance T is measured. A method for continuously cutting a strip electrode plate is characterized in that the cutting position of the strip electrode plate is automatically corrected based on the above.

In the present invention, if the cutting position is corrected by adjusting the traveling speed of the strip electrode plate or the rotation speed of the rotary cutter, the cutting position can be corrected accurately and easily. Any method can be applied to the method for automatically measuring the distance t from the tip of the cut electrode plate to the irregular portion, but a method of converting the electrode plate into an image signal for calculation, a plurality of position sensors The method using is accurate and simple.

[0008]

According to the present invention, a strip-shaped electrode plate provided with a large number of deformed portions at predetermined intervals is made to travel, and the strip-shaped electrode plate is continuously connected to individual electrode plates of the same shape by a rotary cutter in a fixed position. In the method of cutting into 2 pieces, the distance t from the tip of the cut electrode plate to the deformed portion is automatically measured, and then the deviation (t−T) between the measured distance t and the standard distance T
Based on, the cutting position of the strip electrode plate is automatically corrected. Therefore, the strip-shaped electrode plate can be efficiently and continuously cut into an electrode plate having a normal shape without requiring manpower. Since the deviation is automatically measured,
Feedback is faster and yield is improved. Further, since the electrode plate itself is measured to detect the positional deviation, the positional deviation can be accurately detected, and the cutting position is corrected based on the measured value, so that the correction can be accurately performed. If the cutting position of the strip electrode plate is corrected by adjusting the traveling speed of the strip electrode plate or the rotation speed of the rotary cutter, the cutting position can be corrected accurately and easily.

[0009]

EXAMPLES The present invention will be described in detail below with reference to examples. (Embodiment 1) FIG. 1 is an explanatory view showing a first embodiment of the method of the present invention. A strip-shaped electrode plate 10 in which a long grid substrate is filled with an active material is placed on a conveyor 20 and conveyed.
Is cut by a rotary cutter 30 arranged in front of the conveyor 20. A large number of ears 12 are formed on the side edge portion of the strip electrode plate 10 at predetermined intervals, and the ears 12 are cut so that one ear 12 is located at a predetermined position on the electrode plate. The cut electrode plate 11 is carried by the take-out conveyor 21, and when it reaches a predetermined position, it is detected by the optical position sensor 47. Upon receiving this detection signal, the high-speed camera 41 operates to capture the shape of the electrode plate 11 as an image signal, and the image processing device 42 determines the distance t from the tip of the electrode plate 11 to the tip of the ear 12. The measurement is performed, and the deviation (t−T) from the standard distance T is calculated. This deviation and the line speed detected by the tacho generator 43 are input to the controller 44. In the figure, 62 is a line drive synchronous motor.

When a deviation (cutting position error) occurs between the measured distance t and the standard distance T, a rotation speed signal is output from the controller 44 to the stepping motor 45 for a certain period of time. When the deviation (t−T) is positive and negative, the rotation direction of the stepping motor 45 is opposite, and the rotation speed of the stepping motor 45 increases or decreases in proportion to the absolute value of the deviation. The gear ratio of the transmission 46 increases or decreases in proportion to the rotation speed of the stepping motor 45. That is, assuming that the original gear ratio is 1: n, the rotation speed of the stepping motor is ω
In the case of (rpm, positive and negative signs with respect to forward and reverse rotation directions), 1: (n + kω) is obtained (where k is a transmission-specific constant). That is, the rotation speed of the rotary cutter 30 is (| kω | / n) when the measured distance t is longer than the standard distance T.
× 100% delay for a certain time. Figure 2 shows the situation at this time
It is shown schematically in a and b. From the tip of the strip electrode plate 10 to the ear 12
Has been cut with a long distance to (Fig. 2a). Until the next cutting, the rotational speed of the rotary cutter 30 is delayed for a certain period of time to shift the position of the blade 31 rearward (the blade shown by the dotted line). The distance between the next cut portion of the strip electrode plate 10 and the ear 12 is corrected to the standard distance (FIG. 2B). On the contrary, when the measured distance t is shorter than the standard distance T, the speed is increased by (| kω | / n) × 100% for a certain period of time. In this way, the deviation is fed back to the rotary speed of the rotary cutter to correct the cutting position.

In the above embodiment, the change amount (kω) of the manipulated variable is proportional to the absolute value of the deviation (t-T), but the change amount (kω) of the manipulated variable can be made constant and can be adjusted in small steps. is there. Further, in the above embodiment, the change time of the rotation speed of the rotary cutter is constant and the change amount of the operation amount is changed, but the change amount of the operation amount may be constant and the change time may be changed. Further, in the above embodiment, the rotation speed of the rotary cutter is changed, but the rotation speed of the rotary cutter may be fixed and the traveling speed of the conveyor may be changed. Further, it is also possible to arrange two stepping motors and two transmissions and change the speeds of both the rotary cutter and the conveyor for correction. When changing the conveyor speed, the traveling speed of the conveyor is high when the measured distance t is longer than the standard distance T, and slower when the measured distance t is short. Further, in the above-mentioned embodiment, the distance between the tip of the electrode plate and the ear (deformed portion) is the distance between the tip of the electrode plate and the tip of the ear. It does not matter even if the distance is.

(Embodiment 2) FIG. 3 is an explanatory view showing a second embodiment of the present invention. Two distance measuring type position sensors 48, 49 are arranged at a predetermined interval above the take-out conveyor 21, one sensor 48 detects the tip of the electrode plate, and the other sensor 49 detects the tip of the ear. To detect. Each of these signals is input to the controller 44 through the rangefinder converter 50. Normal when both sensors are ON (detected) at the same time,
If not, the cutting position is corrected in the same manner as in the first embodiment.

In the present invention, an arbitrary sensor is used as the position sensor, but in the second embodiment, a rangefinder type position sensor for measuring the distance from the sensor to the object is used. In this sensor, as shown in FIG. 4, the distance to the object changes stepwise when the electrode plate 11 is present or not at the measurement position, and the presence of the object is detected by the change.

The strip-shaped electrode plate was continuously cut into individual electrode plates for a long time by each of the above-mentioned methods. In both cases of Example 1 and Example 2, it was found that the ear was located at a predetermined position. The shaped electrode plate could be cut efficiently without manpower and with high yield.

[0015]

As described above, in the present invention, the distance t from the tip of the cut electrode plate to the deformed portion is automatically measured, and then the deviation (t- T)
Based on, the cutting position of the strip electrode plate is automatically corrected. Therefore, the strip-shaped electrode plate can be efficiently and continuously cut into an electrode plate having a normal shape without requiring manpower. Further, since the deviation is automatically measured, the feedback becomes faster and the yield is improved. Further, the cutting position of the strip electrode plate is corrected by controlling the traveling speed of the strip electrode plate or the rotation speed of the rotary cutter, so that the correction can be performed accurately and easily.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a first embodiment of a method for continuously cutting a strip electrode plate according to the present invention.

FIG. 2 is a schematic diagram showing a state of a continuous cutting method for a strip electrode plate according to the present invention.

FIG. 3 is an explanatory view showing a second embodiment of the continuous cutting method for strip electrode plates of the present invention.

FIG. 4 is an explanatory diagram showing a mode of a position sensor used in the present invention.

FIG. 5 is an explanatory view of a conventional method for continuously cutting a strip electrode plate.

FIG. 6 is an explanatory diagram of a cutting state of a conventional strip electrode plate.

[Explanation of symbols]

 10 ─── Strip electrode plate 11 ─── Electrode plate 12 ─── Ear 20 ─── Conveyor 21 ─── Take-out conveyor 30 ─── Rotary cutter 31 ── ─ Blade 41 ─── High-speed camera 42 ─── Image processor 43 ─── Tacho generator 44 ─── Controller 45 ─── Stepping motor 46 ─── Transmission 47 ─── Optical position sensor 48,49 ─ Distance meter type position sensor 50 ── Distance meter conversion Device 60 ─── Ear sensor 61 ─── Blade sensor 62 ─── Synchronous motor for line drive

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hirokazu Sato 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd. (72) Satoshi Hamakawa 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Co., Ltd.

Claims (2)

[Claims] 1. A strip-shaped electrode plate provided with a large number of deformed portions at predetermined intervals is run, and the strip-shaped electrode plate is continuously cut into individual electrode plates of the same shape by a rotary cutter in a fixed position. In the method, the distance t from the tip of the cut electrode plate to the deformed portion is automatically measured, and then the strip electrode plate is cut based on the deviation (t−T) between the measured distance t and the standard distance T. A method for continuously cutting a strip electrode plate, which is characterized by automatically correcting the position. 2. The continuous cutting method for a strip electrode plate according to claim 1, wherein the cutting position is corrected by adjusting the traveling speed of the strip electrode plate or the rotation speed of a rotary cutter.