JPH065719U - Straightening device for long end bending - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the accuracy of measurement of the amount of bending at the end of the long material 2 to improve the accuracy of correction, and to make an appropriate judgment of correction at the same time. [Structure] The turning roller 1 is provided at a position separated from the end surface of the long material 2 by L1 and further separated by L1 or more on the central side.
Place a and 1b. A plurality of bend measuring sensors 3 are arranged between the end side turning roller 1a and the end surface of the long material 2. The bending correction sensor 4 is arranged at a position distant from the end side turning roller 1a to the center of L1. The pulse generator 5 is arranged so as to sandwich the long material 2 with the end side turning roller 1a. The arithmetic circuit 6 obtains the maximum bending amount of the end of the long material 2 and its position, and calculates the pushing amount into the maximum bending portion. The straightening machine presses down the maximum bending portion based on the output signal from the arithmetic circuit 6. A touch sensor 9 is installed on a mold 8 that supports the long material 2.
A push-in amount sensor 10 for detecting the amount of bending of the long material 2 after correction is installed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus capable of correcting an end bending of a long material with high accuracy and simultaneously determining whether or not the correction is appropriate.

[0002]

[Prior art]

 An apparatus for correcting the bending of an end of a long material is disclosed in, for example, Japanese Patent Laid-Open No. 59-39419. This bending correction device measures the bending amount of each point in the circumferential direction at multiple positions in the axial direction of the long material, finds the maximum bending portion of them, and applies the correction force to the obtained maximum bending portion. It is composed of.

[0003]

[Problems to be solved by the device]

 However, the correction device having the above configuration has the following drawbacks. Although the bending at the center of the rotating roller, which is the fulcrum of bending measurement, affects the measured value at the end, the bending at the center is not taken into consideration, so the correct measured value can be obtained. I can't.

After correcting the maximum bending portion by applying the correction force, whether or not the correction is appropriate must be measured by rotating the long material again. It is a structure that moves the press in the axial direction of the long material, and its structure is complicated.

The present invention has been made in view of the above-mentioned problems, and it is possible to accurately correct the end bending of a long material with a simple structure, and whether or not the correction is appropriate. The purpose of the invention is to provide a correction device that can make judgments at the same time.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the straightening device for bending the end portion of the long material of the present invention is provided with a position distant from the end surface of the long material to be corrected by a required dimension and further from the position to the center of the long material. Between a pair of turning rollers which are arranged at positions apart from each other by the required dimension or more and rotate the long material in place, and between the end side turning roller of these turning rollers and the long material end surface. A plurality of bend measurement sensors arranged at a predetermined interval and a bend correction sensor arranged at a position distant from the center by the same distance as the required dimension from the end side turning roller and the end side turn roller. Pulse generator, which is arranged opposite to each other so as to sandwich the long material with the roller and detects the circumferential position of the long material, the bending measurement sensor, the bending correction sensor, and the pulse jerk. An arithmetic circuit for calculating the maximum bending amount of the end of the long material and its position based on the measured value from the lator, and calculating the pushing amount of the long material into the maximum bending portion, and the output from the arithmetic circuit. A straightening machine that pushes the maximum bending portion with a required pushing amount based on a signal, and a ram cylinder of the straightening machine and a long material are sandwiched between the straightening machine and the straightening machine. The dies that support the materials and the touch sensors that are placed in these dies and that detect when the long material is supported by both dies during straightening, and both dies based on the detection by this touch sensor. It is equipped with a push-in amount sensor that detects the amount of bending after correction of the long material after correction after being supported.

[0007]

[Action]

 The device for correcting the bending of the end of the long material of the present invention measures the bending of the end of the long material by taking into account the amount of deflection of the central part of the long material by the bending correction sensor. Further, in the present invention, when the correction is made based on the measured end bending amount, the touch sensor and the pushing amount sensor detect the bending amount after the correction simultaneously with the correction.

[0008]

【Example】

 Hereinafter, a straightening device for bending an end of a long material according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic configuration diagram of a bend measuring unit that constitutes the present invention, FIG. 2 is a schematic configuration diagram of a correction unit that constitutes the present invention, and FIG. 3 is a bend when there is no bend at the center and only at the ends. FIG. 4 is an explanatory diagram of how to determine the amount of bending, FIG. 4 is an explanatory diagram of how to determine the amount of bending when there is no bending at the ends and only at the center, and FIG. 5 is an explanatory diagram of whether or not correction is appropriate. FIG. 6 is an explanatory diagram of how to obtain the correction amount.

In the drawings, 1a and 1b are, for example, at a position L1 away from the end surface of the long member 2 whose end bending is to be corrected, and at a position L1 or more further away from the center part of the long member 2 from the position. A pair of turning rollers arranged at positions, and the long member 2 whose end faces are aligned by these turning rollers 1a and 1b are rotated in place.

Reference numeral 3 denotes a turning roller (hereinafter simply referred to as an “end side turning roller”) 1 a installed on the end side of the long material 2 and an end surface of the long material 2 with a predetermined gap. For example, 10 bending measurement sensors are arranged, and 4 is a bending correction sensor arranged at a position further away from the end side turning roller 1a by L1 toward the center side. These bending measurement sensors 3 and bending correction sensors are provided. As the sensor 4, for example, a non-contact type such as a laser type is adopted.

Reference numeral 5 denotes a pulse generator for detecting the circumferential position of the long material 2, which is arranged so as to sandwich the long material 2 with the end side turning roller 1a. The pulse generator 5 also functions as a pinch roller that presses the long material 2 against the end-side turning roller 1a.

Reference numeral 6 denotes an arithmetic circuit, which is based on the measurement values sent from the bending measurement sensor 3, the bending correction sensor 4, and the pulse generator 5, and determines the maximum bending amount of the end of the long material 2 and its position ( The axial and circumferential positions) can be obtained as follows.

As shown in FIG. 3, when the long member 2 having no bend in the central portion is rotated around its axis, the bending amount X ₀ i at the end portion is the measured value of the bending measuring sensor 3. If Xi, X ₀ i = Xi / 2. On the other hand, as shown in FIG. 4, when the long member 2 having only the central portion and the end portion having no bending is rotated around its axis, the central portion is bent Xi '(this Xi' Is measured by the bending correction sensor 4), and the end portion rotates about the end-side turning roller 1a as a fulcrum with the same amount of deflection as the central portion bending Xi '.

Therefore, when the long member 2 having a bend not only in the end portion but also in the center portion is rotated, the accurate bend amount of the end portion is measured value Xi obtained as shown in FIG. Is obtained by subtracting the measured value Xi ′ obtained as shown in FIG. In this way, the arithmetic circuit 6 obtains an accurate bending amount from the measured values from the bending measuring sensors 3, and the axial position of the portion having the maximum bending amount among these bending amounts and the pulse generator. The position in the circumferential direction is obtained based on the measurement value sent from the No. 5.

The arithmetic circuit 6 obtains the maximum bending amount of the end portion of the long material 2 to be straightened and the position thereof as described above, and then the load based on the composition of the long material 2 which is input in advance. Using the P-pushing amount δ curve, predict the load (pushing amount) to be applied to the maximum bending portion of the long material 2 in consideration of the springback amount (see Fig. 6), and correct based on this predicted value. Operate the ram cylinder 7 of the machine. Reference numeral 11 is a load cell for measuring the load, and the measured value is also output to the arithmetic circuit 6.

By the way, the straightening machine is installed at a position different from the above-mentioned bending measuring section, and the long member 2 is placed so that the maximum bending section obtained by the bending measurement comes on the axial line of the rod of the ram cylinder 7. Positioned.

Reference numeral 8 is arranged in a distributed manner with respect to the axial position of the rod of the ram cylinder 7 so as to support the long material 2 when the maximum bending portion of the end of the long material 2 is straightened by a straightening machine. These are molds, and touch sensors 9 are provided on the supporting surfaces of these molds 8, respectively, and whether or not the long material 2 is supported by these molds 8 is output to the arithmetic circuit 6. .

Reference numeral 10 denotes a pushing amount sensor arranged on the axis of the ram cylinder 7 at a lower position of the long material 2 placed on the die 8. After the sensor 9 detects that the long material 2 is supported by both molds 8, the pushing amount δ is measured based on the predicted value (see FIG. 6), and the pushing amount of the ram cylinder 7 is determined. The displacement amount after correction of the long material 2 (distance between points a and b in FIG. 5) is detected. The amount of displacement of the long material 2 after correction is also output to the arithmetic circuit 6 to determine whether or not the correction is appropriate. If the amount of bending after straightening is out of the allowable tolerance, the straightening is performed again based on the amount of bending after straightening.

[0019]

[Effect of device]

 As described above, the device for correcting the bending of the end of a long material according to the present invention, when measuring the bending of the end of a long material, also considers the deflection amount of the central part of the long material by the bending correction sensor. Since the measurement is performed, the measured value is accurate, and when correcting based on the measured amount of bending of the end portion, the touch sensor and the push-in amount sensor perform correction and simultaneously detect the amount of bending after correction. Since it can be determined whether or not the correction was proper, work efficiency is greatly improved.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a bend measuring unit constituting the present invention.

FIG. 2 is a schematic configuration diagram of a correction unit that constitutes the present invention.

FIG. 3 is an explanatory diagram of how to determine the amount of bending when there is no bending in the center and only at the ends.

FIG. 4 is an explanatory diagram of how to determine the amount of bending when there is no bending at the end and only at the center.

FIG. 5 is an explanatory diagram for determining whether or not correction is appropriate.

FIG. 6 is an explanatory diagram of how to determine a correction amount.

[Explanation of symbols]

 1a ・ 1b Turning roller 2 Long material 3 Bending measurement sensor 4 Bending correction sensor 5 Pulse generator 6 Arithmetic circuit 7 Ram cylinder 8 Mold 9 Touch sensor 10 Pushing amount sensor

Claims (1)

[Scope of utility model registration request] 1. A device for straightening an end bend of a long material, said device being located at a position distant from the end face of the long material to be straightened by a required dimension, and further from the position to the central portion side of the long material. A pair of turning rollers arranged at positions separated by a required dimension or more to rotate the long material in place, and a predetermined distance exists between the end side turning roller of these turning rollers and the long material end surface. The plurality of bend measuring sensors and the bend correction sensor arranged at a position distant from the end side turning roller by the same distance as the required dimension from the center part, and the end side turning roller, A pulse generator that is arranged so as to sandwich the length member and detects the circumferential position of the length member, and the measurement values from the bend measurement sensor, bend correction sensor, and pulse generator. The maximum bending amount of the end of the long material and its position are obtained based on the calculation circuit for calculating the pushing amount of the long material into the maximum bending portion, and the maximum based on the output signal from the calculation circuit. A straightening machine that presses the bent portion with a required pushing amount, and a mold that is arranged at a required interval on the opposite side with the ram cylinder of the straightening machine sandwiching the long material and that supports the long material during straightening. A touch sensor disposed in these molds for detecting the time when the long material is supported by both molds during correction, and a correction after the time when the long material is supported by both molds based on the detection by the touch sensor. And a pressing amount sensor for detecting the amount of bending of the long material after being straightened, according to the present invention.