JPH01210126A - Roll bending device for spiral sheet - Google Patents

Abstract

PURPOSE:To obtain a spiral sheet having a fixed angle between adjust teeth and free from deviation by computing the angle with a computing element and controlling a rolling condition for roll bending by the deviation between this angle and a preset angle. CONSTITUTION:When a band sheet 1 provided alternately in advance with teeth 1a and notches 1b is supplied to a stock supplying side of rolling rolls 2, 3, a side provided with roll-bent notches 1b and teeth 1a is obtained on the inside of a spiral sheet 1A. The outputs of sensors 5, 6, 7 located on the notches of the spiral sheet 1A are inputted into a time difference instrumentation 9 through an amplifier 8 and the output of the instrumentation 9 is inputted into a computing element 10. In the computing element 10, correction quantities to a position and posture of the roll 3 are computed by the operation of an angle between teeth 4, 4' by the computing element 10 and the difference between the preset angle and the angle between the teeth 4, 4'. Those outputs are inputted into a hydraulic controller 11 and a hydraulic cylinder 12 so that the position and posture of the roll 3 are corrected and roll bending can be continued.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rolling and bending apparatus for manufacturing a spiral plate having the notches on the inside from a strip-shaped thin plate in which comb-shaped notches are provided in advance, and particularly relates to The present invention relates to a rolling bending apparatus for spiral plates, which is suitable for manufacturing a motor core by stacking the spiral plates.

[Prior Art] Conventionally, as a method for manufacturing a spiral plate with a notch, for example, as described in Japanese Patent Application Laid-Open No. 53-87965,
A strip with pre-notches is wrapped around a shaft, and the cuts are opened by shearing due to the difference in curvature between the outer and inner peripheries of the strip, thereby creating a spiral shape with a notch on the outer periphery of the shaft. Methods of manufacturing heat exchangers provided with plates are known.

In addition, as described in Japanese Patent Application Laid-Open No. 59-10421,
There is also a known method for manufacturing helical fins with notches by supplying a strip-shaped thin plate between rolling rolls with grooves of a predetermined shape formed on the roll surface, and causing cracks to occur in the portion of the thin plate that comes into contact with the grooves.

[Problems to be Solved by the Invention] The above-mentioned prior art does not take into account the fact that when spiral plates with notches are stacked, the notches are not aligned between the stacked eyebrows.

For example, problems when manufacturing a motor core by stacking spiral plates will be explained using FIG. 6.

FIG. 6 is a perspective view showing an example of a motor core made by laminating spiral plates with notches, manufactured by a conventional manufacturing method.

As is clear from FIG. 6, this motor core 19 has a notch 18a in a spiral plate 18 having a notch.

They were not aligned in the thickness direction, resulting in so-called ``interlayer misalignment,'' which made them unsuitable for use as motor cores.

An object of the present invention is to solve the problems of the prior art described above and to provide a rolling and bending apparatus capable of manufacturing a spiral plate that does not cause misalignment between five layers when stacked. be.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the rolling and bending device for a spiral plate according to the present invention has a configuration in which a strip-shaped thin plate is provided with comb-shaped notches in advance on one side in the width direction. In a rolling bending apparatus for manufacturing a spiral plate with the notch on the inside by rolling and bending the side without the notch with a pair of rolling rolls,
A sensor capable of measuring the moving speed of the rolled and bent spiral plate and the passing time between two teeth, and the output from this sensor, the angle formed between the two teeth, the preset setting angle and the a calculator that can calculate the amount of modification of the rolling conditions based on the difference from the angle; and a mill roll control device that can modify the rolling conditions of the roll by the amount of modification based on a command from the calculator. It is equipped with the following.

More details are as follows.

The above object is to form a strip-shaped thin plate with a notch in advance into a spiral shape by rolling and bending, and to provide a sensor that can measure the moving speed of this spiral plate and the timing at which the notch passes. A computing unit that can calculate the deviation of the angle formed by multiple notches, that is, the angle between the teeth, from a preset setting angle from the output of the computing unit, and the position and posture change according to the output of this computing unit. This is achieved by providing a rolling roll.

[Operation] The angle formed between the teeth is accurately calculated inside the calculator from the moving speed of the spiral plate and the timing at which the notch passes, regardless of the rolling bending speed. Then, depending on the deviation of this angle from a preset set angle, the rolling conditions for rolling bending are controlled, and the angle formed between the teeth is kept constant. Thereby, it is possible to manufacture a helical plate without deviation.

[Example] Hereinafter, the present invention will be explained by examples.

FIG. 1 is a schematic configuration diagram showing a rolling and bending apparatus for a spiral plate according to a first embodiment of the present invention, and FIG. 2 is a perspective view showing details of the rolling roll and sensor vicinity in FIG. 1. , FIG. 3 is a front view showing the arrangement position of the sensor, FIG. 4 is a timing chart showing the operation of this sensor, and FIG. 5 is an example of a motor core manufactured by the rolling bending apparatus according to FIG. 1. FIG.

The outline of this rolling and bending device will be explained with reference to FIGS. 1 and 2. This is a thin strip plate 1 in which a comb-shaped notch is provided in advance on one side in the width direction. A spiral plate IA having the notch on the inside is manufactured by rolling and bending with rolling rolls 2 and 3, and the moving speed of the rolling and bending spiral plate IA and the passing time between two teeth are sensors 5, 6, and 7 capable of measuring
A computing unit 10 is capable of calculating the amount of modification of the rolling conditions based on the angle formed between the two teeth and the difference between a preset setting angle and the angle based on the outputs from the sensors 5, 6.7. , a hydraulic controller 1 according to a rolling roll control device capable of correcting the rolling conditions of the rolling rolls 2.3 by the correction amount according to a command from the computing unit 10.
1. This is a rolling and bending device equipped with a hydraulic cylinder 12.

This will be explained in detail below.

Reference numeral 2.3 denotes a pair of rolling rolls driven by drive motors 13 and 14, respectively, and on the material supply sides of these rolling rolls 2 and 3, there are strip-shaped thin plates 1 in which teeth 1a and notches 1b are alternately provided in advance. When supplied, it is rolled and bent to obtain a spiral plate IA with the side provided with the notches 1b and the teeth 1a being on the inside. Sensors 5, 6.7 (details will be described later) are provided so as to be located in the notch of this spiral plate LA. The outputs of these sensors 5, 6.7 are inputted to a time difference measuring device 9 via an amplifier 8, and the output of this time difference measuring device 9 is inputted to a computing unit 10.

This calculator 1o calculates the angle e44' between the teeth 4 and 4' (details will be described later), and calculates the rolling conditions for the roll 3 based on the difference between the preset setting angle and the angles θ and 4'. The amount of correction of the position and posture of is calculated, and the output is sent to the hydraulic controller 11. It is input to the hydraulic cylinder 12, the position and posture of the roll 3 can be corrected, and rolling and bending can be continued.

The arrangement of the sensors 5, 6.7 will be explained with reference to FIGS. 2 and 3. The sensors 5, 6 are spaced apart from each other by an angle θ5° (an angle corresponding to one pitch of the notch in the spiral plate). Further, the sensors 5 and 7 are spaced apart from each other by an angle es (an angle approximately π apart from the middle of the sensors 5 and 6), and are arranged at a position midway between the tips and roots of the teeth of the spiral plate IA. There is.

When the rolling and bending apparatus configured as described above is turned on after setting the rolling conditions, the rolling rolls 2 and 3 are rotated by the drive motors 13 and 1.4, and the strip-like shape supplied from the direction of the arrow (FIG. 2) is The thin plate 1 is rolled and bent by rolling rolls 2.3, and a spiral plate IA having a predetermined radius is successively formed and laminated. The time difference between when one tooth 4 of this spiral plate IA operates the sensor 5 and when the sensor 6 is operated is T□, and after the tooth 4 operates the sensor 5 and when the other tooth 4 If the time difference until operating ' is T, 7, then the angular velocity α related to the moving speed of the spiral plate IA is the following (1
) is given by the formula.

α" es@/ Tss --- (1) Also, if the angle between teeth 4 and 4' is 044', the time difference T, 7 is as follows: Ts-t= (esi-e*,')/ a---(2) If we express this as 8.4', θ, 4'=θ57-Tst' U --(3) If we substitute the above equation (1) into this equation (3), we get the tooth The angle e4.' formed by 4.4' is 044'=θs7@5G-Tst/'rsa-(
4) In this way, the angle 044' between the teeth 4 and 4' is determined by equation (4) regardless of the rolling bending speed, in other words, the angular velocity α of the spiral plate IA.

The amount of modification of the rolling conditions is calculated based on the difference between this angle e44' and a preset setting angle, and this amount of modification is transmitted to the hydraulic cylinder 12 via the hydraulic controller 11.
The position and attitude of the roller 3 are corrected, a motor core 19A with no interlayer displacement is obtained at the predetermined radius, and the rolling and bending device is turned off.

According to the embodiment described above, the teeth 4, 4 spaced apart from each other
Since the angle formed between I can do it.

The motor core 19A without interlayer displacement can be easily manufactured. Moreover, the material yield is improved, and the motor core 19A can be manufactured with high efficiency and at low cost.

Other embodiments will be described below.

Although the above embodiment uses three sensors, the number is not limited to three.

FIG. 7 is a perspective view showing the main parts of a rolling and bending apparatus for a spiral plate according to a second embodiment of the present invention.

In FIG. 7, the same parts as those in FIG. 2 are denoted by the same numbers.

In this embodiment, instead of the sensor 6, a speed detection roller 15 is provided which is directly connected to the tachometer 16 and comes into contact with the non-notched side of the spiral plate IA.

According to this embodiment, in addition to the effects of the first embodiment described above, there is an advantage that the moving speed of the spiral plate IA can be continuously tracked.

FIG. 8 is a perspective view showing the main parts of a rolling and bending apparatus for a spiral plate according to a third embodiment of the present invention.

In this embodiment, only one sensor 5 can measure the moving speed of the spiral plate IA and the angle formed between two teeth.

Since the tooth width does not change even when the strip-shaped thin plate 1 is rolled and bent, the moving speed of the spiral plate IA is calculated from the time during which the teeth 4 operate the sensor 5.

After tooth 4 operates sensor 5, other tooth 4' operates sensor 5.
The angle formed between the two teeth 4, 4' is calculated from the time difference until the movement is started and the moving speed, and the other aspects are the same as in the first embodiment.

According to this embodiment, since only one sensor needs to be provided, there is an advantage that the structure of the rolling and bending apparatus is simplified.

FIG. 9 is a schematic configuration diagram showing a rolling and bending device for a spiral plate according to a fourth embodiment of the present invention, and FIG. 10 is a perspective view showing details of the rolling roller and sensor vicinity in FIG. 9. It is a diagram.

In the figure, the same parts as in FIGS. 1 and 8 are denoted by the same numbers. Furthermore, 17 is provided on the exit side of the rolling rollers 2 and 3 for shaping the radius of the spiral plate IA to a predetermined radius.
This is a curvature restraining roller arranged so as to come into contact with the outer periphery of the spiral plate IA. This curvature restraint roller 17 is provided.

As the hydraulic cylinder, only the hydraulic cylinder 12 capable of controlling the position of the rolling roll 3 is provided.

According to this embodiment, there are advantages in that the rolling rolls 3 can be easily controlled and the structure of the rolling and bending device is further simplified.

In addition, in each of the above embodiments, the position of the rolling roll 3,
Although the hydraulic cylinder is used to correct the posture, a drive mechanism other than the hydraulic cylinder, such as an electric motor or a hydraulic motor, may be used.

Further, in the embodiment described above, the position and orientation of only one of the rolling rolls 2 and 3, that is, the rolling roll 3, was corrected, but it would be possible to correct the position and attitude of both rolling rolls 2 and 3. , it has the advantage of not destroying the symmetry of rolling bending.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a rolling and bending apparatus that can manufacture a spiral plate that does not cause any misalignment between layers when stacked.

[Brief explanation of the drawing]

FIG. 1 relates to a first embodiment of the present invention. FIG. 2 is a schematic configuration diagram showing a rolling and bending device for a spiral plate. FIG. 2 is a perspective view showing details of the rolling roll and the vicinity of the sensor in FIG. 1. FIG. 3 is a front view showing the arrangement position of the sensor. Fig. 4 is a timing chart showing the operation of this sensor, Fig. 5 is a perspective view showing an example of a motor core manufactured by the rolling and bending apparatus according to Fig. 1, and Fig. 6 is a timing chart showing the operation of this sensor. Manufactured. FIGS. 7 and 8 are perspective views showing an example of a motor core formed by laminating spiral plates with notches, respectively, according to second and third embodiments of the present invention. FIG. 9, a perspective view showing the main parts of a rolling and bending device for a spiral plate, relates to a fourth embodiment of the present invention. FIG. 10, a schematic configuration diagram showing a rolling and bending device for a spiral plate, is a perspective view showing details of the rolling roller and sensor vicinity in FIG. 9. 1... Band-shaped thin plate, 1a... Teeth of the band-shaped thin plate, 1b...
・Notch in band-shaped thin plate, IA...Spiral plate, 2, 3...
Rolling roll, 4.4', 4'...Spiral plate teeth, 5
, 6゜7...sensor, 10...computer, 11...
Hydraulic controller, 12...hydraulic cylinder.

Claims (1)

[Claims] 1. A spiral plate with the notch on the inside is manufactured by rolling and bending the side without the notch of a thin strip plate having a comb-shaped notch on one side in the width direction using a pair of rolling rolls. In a rolling and bending device, a sensor is provided that can measure the moving speed of a spiral plate that has been rolled and bent, and the time taken to pass between two teeth, and the angle formed between the two teeth and a preset value are determined by the output from this sensor. A computing device that can calculate the amount of modification of the rolling conditions based on the difference between the set angle and the angle, and a command from this computing device makes it possible to modify the rolling conditions of the rolling roll by the amount of modification. 1. A rolling and bending device for a spiral plate, comprising a rolling roll control device.