JP2003164912A - Roller leveller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller leveller with high versatility for general use. <P>SOLUTION: In the roller leveller 1, an ultrasonic wave emitted from an ultrasonic emission chamber 31 is beamed to a flat face in a bottom of a loop R from either right upside or right downside. Then an ultrasonic wave detector 32 receives the ultrasonic wave reflected at the bottom of the loop R. When ultrasonic wave is applied for detection of the loop amount, the ultrasonic wave inherently to its characteristics comes back without fail, even in case of an irregular surface condition of the material A such as a lead frame or the like. Furthermore, the ultrasonic wave is beamed not from the side of the loop R, but to the flat face of the loop R so that recognition of continual displacement of the loop R becomes easier. Eventually the ultrasonic wave detector 32 can continue to send consistent control signals to a motor 25, which enables accurate, continuous control on the rotation speed of rollers 21, 22. Thus, the roller leveller 1 which enables detection of the loop amount by ultrasonic wave, broadens applicability of the materials A to be roller-levelled and actualizes a highly versatile apparatus. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll leveler for correcting curl, distortion, etc. of a band-shaped material.

[0002]

2. Description of the Related Art Conventionally, as a technique in such a field, JP-A-53-114770 and JP-A-63-2961 are known.
No. 5, for example. The roll levelers described in these publications have a plurality of upper rollers and a lower roller facing each other, and a band-shaped metal material (hoop material) wound in a roll shape is inserted between these rollers. So, the distortion of the material is corrected. When the straightened material is fed into a post-processing device such as a press, the material is fed intermittently in the press, whereas it is fed continuously in the roll leveler. Therefore, between the roll leveler and the post-processing device, a curved talumi portion is generated in the straightened material, and by detecting the talumi amount of this talmi portion, the feed amount of the material discharged from the roll leveler is controlled. A series of processing is achieved by the roll leveler with different feed amount and the post-processing device.

[0003]

As a talumi amount detecting means used in the above-mentioned conventional roll leveler, there is a rocking lever which is used while being placed on the talmi portion of the material. The swing lever moves up and down according to the amount of Talmi, and detects the amount of Talmi according to the amount of fluctuation. However,
A mechanical contact sensor such as an oscillating lever requires the sensor itself to come into contact with the material, and a thin and easily deformable material has the disadvantage of causing contact scratches and deformed parts on the surface of the material. There was a problem that the material that can be corrected by the leveler was limited.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a roll leveler having high versatility.

[0005]

In a roll leveler according to the present invention, an upper roller and a lower roller, which are arranged side by side, are driven by a motor, and a strip-shaped material is inserted between the upper roller and the lower roller to form a material. In the roll leveler for straightening, the ultrasonic wave emitting part that emits ultrasonic waves in the vertical direction toward the plane side of the curved talmi part of the material that appears after the material is straightened, and the ultrasonic wave that detects the ultrasonic waves reflected by the plate material And a sound wave detector.

In this roll leveler, a curved talmi portion is made to appear after the material is straightened, so that the material is stably supplied to a press or the like. In monitoring such a talmi portion, in the present invention, the ultrasonic wave emitted from the ultrasonic wave emitting portion is applied to the talmi portion from directly above or below the plane side of the talmi portion. Then, the ultrasonic wave reflected by the tarumi portion is received by the ultrasonic wave detecting unit. Thus, when ultrasonic waves are used to detect the amount of Talumi, even if the surface of the material is non-uniform, such as in a lead frame, the ultrasonic waves are reliably reflected and returned due to their characteristics. Also, instead of applying the ultrasonic waves from the side of the Talumi portion, the ultrasonic waves are applied to the flat side of the Talmi portion, making it easier to recognize the continuous displacement of the Talmi portion. A continuous control signal can be continuously sent to the motor, and the rotation speed of the roller can be continuously controlled with high precision. Therefore, the roll leveler capable of detecting the amount of tarumi by ultrasonic waves expands the range of selection of correctable materials, and realizes an extremely versatile plate material straightening device.

Further, it is preferable that the ultrasonic displacement sensor having the ultrasonic wave emitting portion and the ultrasonic wave detecting portion is provided with a trumpet-like sound collecting portion which is widened toward the talmi portion. . When such a configuration is adopted, even if the surface of the material is extremely uneven, such as a lead frame, the sound collecting property of ultrasonic waves can be enhanced, and reliable ultrasonic detection can be achieved. .

Further, it is preferable that a peripheral surface of at least one of the upper roller and the lower roller is provided with a processed portion which comes into contact with the surface of the material and a relief portion which does not come into contact with the surface of the material. When such a configuration is adopted, it is possible to correct the distortion or the like of the strip-shaped material by dividing the portion into a portion requiring processing and a portion not requiring processing. That is, in the case of correcting the distortion of the band-shaped material on which the chip component or the like is mounted, the portion that requires the material processing and the portion that does not require the material processing are mixed. Therefore, in the insertion direction of the material, the roller is provided with a processed portion so as to correspond to the portion where the material needs to be corrected, and the relief portion is provided at the roller so as to correspond to the portion where the material is not required to be corrected. Depending on the type of strip-shaped material, it is possible to process only the portion of the material that requires straightening. As a result, it has become possible to correct the curl and distortion of the band-shaped material on which chip parts and the like, which have been difficult until now, are mounted. The use of ultrasonic waves is particularly effective for such special materials.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of a roll leveler according to the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, the roll leveler 1 is
It is installed and used in front of a press machine for punching a strip-shaped plate material (material) A such as a steel plate. As a pretreatment of the press processing, for example, a plate material A rolled into a roll and having a curl. It is used for partial correction and correction of warp, twist, flatness, etc. of the strip-shaped plate A on which components such as chips are mounted.

The roll leveler 1 has a box-shaped main body 2 in which a control device and the like are housed, and a roller box 3 is arranged on the main body 2. A roller row R including an upper roller 21 and a lower roller 22 arranged side by side in the front-rear direction is accommodated in the roller box 3, and a gap between the upper roller 21 and the lower roller 22 is adjusted. , Corresponding to plate materials A having various thicknesses.

Further, the roll leveler 1 has a roller row R
A carry-in device (not shown) for stably guiding the plate material A to the roller row R is provided at the entrance side of the. On the inlet side of the carry-in device, a pair of upper and lower guide rollers for sandwiching and holding the plate material A are arranged, and each guide roller is rotatably attached to a base bolted to the main body 2. ing. Then, the plate material A wound in a roll shape is sandwiched between the guide rolls to appropriately suppress the fluttering of the plate material A in the vertical direction. Further, the carry-in device 5 is provided with a plate material regulation guide mechanism (not shown) for preventing the plate material A from swinging to the left and right (width direction) at the entrance side of the roller row R.

This plate material regulation guide mechanism has a total of four width regulation rollers arranged two each on the left and right. Each width regulation roller rotates freely and at the same time, the plate material is regulated by a predetermined link mechanism or feed screw mechanism. It is configured to be movable in the width direction of A. Therefore, the plate material A is sandwiched from both sides by each width regulating roller adjusted so as to correspond to the width of the plate material A, and the flapping of the plate material A in the lateral direction is appropriately prevented.

Here, as the strip-shaped plate material (material) A, a lead frame F on which chip components S and the like are mounted will be described as an example. As shown in FIG. 2, the roll leveler 1
Has a roller row R in which a pair of upper and lower rollers 21 and 22 are juxtaposed in the front-rear direction. The joint portions 21c and 22c of the upper roller 21 and the lower roller 22 have one ends of universal joints 23 and 24, respectively. It is connected. Further, the rotational force of the motor 25 is the pulley 25a.
Is transmitted to the speed reduction mechanism section 26 via a belt 27 wound between the belt and the pulley 26a. Then, the deceleration mechanism 26 rotates the universal joints 23 and 24 at a predetermined speed. Therefore, the upper roller 21 and the lower roller 22 are rotated by the rotational force of the universal joints 23 and 24, and the lead frame F that is continuously inserted is sandwiched from above and below to be corrected while being pressed.

As shown in FIGS. 2 to 4, the upper roller 21 and the lower roller 22 having a predetermined rotation speed have the same shape, and have a shape corresponding to the lead frame F as an object to be processed. is doing. That is, each roller 21, 2
On the peripheral surface of 2, the large-diameter processed portions 21a and 22a that come into contact with the surface of the plate material A of the lead frame F and the small-diameter relief portion 2 that does not come into contact with the surfaces of the chip component S and the plate material A
1b and 22b are provided. Such escape portions 21b and 22b are provided at two positions on the left and right of each roller 21 and 22 so as to correspond to the insertion direction of the chip components S aligned in two rows.

As described above, in the roll leveler 1,
Since the rollers 21 and 22 are provided with the processing portions 21a and 22a that come into contact with the surface of the strip-shaped plate A and the relief portions 21b and 22b that do not come into contact with the surface of the plate A,
It is possible to correct the distortion or the like of the strip-shaped plate material A by dividing into a part that requires processing and a part that does not require processing. For example, a strip-shaped plate material A on which the chip component S is mounted
In the case of correcting such distortion, the part of the plate material A that needs processing and the part of the plate material A that does not require processing coexist.

Therefore, in the insertion direction of the plate material A, the rollers 21,
22 is provided with processing portions 21a and 22a, and relief portions 21b and 22b are provided to the rollers 21 and 22 so as to correspond to the portions of the plate material A which do not require correction. Therefore, depending on the type of the plate material A, only the part of the plate material A that needs to be corrected can be partially processed. As a result, it has become possible to correct the curl and distortion of the plate material A, which has been difficult until now, for the band-shaped plate material A on which the chip component S is mounted.

The large-diameter processed portions 21a and 22a are provided at both ends of the rollers 21 and 22 as shown in FIGS. 4 and 5, and are arranged in a row in the insertion direction at both ends of the plate A in the width direction. It is provided corresponding to the formed feed pitch hole 29. Therefore, even if a burr or the like is generated in the feed pitch hole 29 used during press working or chip mounting, the shape of the feed pitch hole 29 can be corrected to an appropriate shape. Further, the processing portions 21a and 22a are also provided in the central portions of the rollers 21 and 22, and the processing portions 21a and 22a are provided.
Reference characters a and 22a contribute to the correction of the portion of the plate material A that connects the left and right chip components S. In this way, the processed portions 21a, 22a and the relief portions 21b, 22b
As a result of using the rollers 21 and 22 mixed with and, the feed pitch hole 26 can be appropriately corrected while avoiding the chip component S.

Further, as shown in FIG. 1, the roll leveler 1 is used by being installed in front of a press machine for punching a strip-shaped plate material (material) A such as a steel plate. It is necessary to absorb a slight speed deviation between the intermittent feeding speed of the plate material A (not shown) and the continuous feeding speed of the plate material A on the roll leveler 1. Therefore, by generating a curved talumi portion R on the plate material A discharged from the roll leveler 1, the material A for the press machine is formed.
Consider a stable supply of. This Talumi portion R is the main body 2
Of the first holding roller 28 provided on the plate material outlet side of the plate and the second holding roller 28 provided on the height adjusting arm 32 fixed to the main body 2.
It is created by being hung between the holding roller 33 and the holding roller 33.

Further, the roll leveler 1 is shown in FIGS.
As shown in FIG. 3, the ultrasonic displacement sensor 30 for measuring the amount of Talmi of the plate material A discharged from the roller row R is provided. An ultrasonic wave emitting portion 31 for emitting an ultrasonic wave having a directivity angle of about 5 degrees is provided on the tip surface of the ultrasonic displacement sensor 30,
An ultrasonic wave detection unit 32 for continuously receiving the ultrasonic waves reflected by the plate material A is provided. The ultrasonic displacement sensor 30 as described above is housed in a protective cover 34 so that the angle thereof can be freely adjusted, and the protective cover 34 is fixed to a height adjusting arm 35 attached to the main body 2.

In this ultrasonic displacement sensor 30, the ultrasonic wave emitting portion 31 emits an ultrasonic wave from directly above to the lowermost portion of the talumi portion R on the plane side.
Further, the ultrasonic waves reflected at the lowermost portion of the Talumi portion R continue to be incident on the inside of the ultrasonic wave detecting unit 32, are output to the outside as a continuous electric signal, and continue to control the motor 25. When ultrasonic waves are used to detect the amount of tarmi, even if the surface of the plate material A is extremely uneven, such as the lead frame F on which the chip components S and the like are mounted, different from light. Due to its characteristics, ultrasonic waves are highly likely to be reflected and returned. Therefore, the use of ultrasonic waves is particularly useful for the material A, the lead frame F, and the like, which are thin and easily deformed such that contact-type sensors cannot be used.

Further, since the ultrasonic wave is not applied from the side of the Talumi portion R but continuously applied to the plane side of the Talmi portion R, continuous displacement of the Talmi portion R can be easily recognized, and as a result, From the ultrasonic detector 32 to the motor 2
5, the continuous control signal can be continuously sent to, and the rotation speeds of the upper and lower rollers 21 and 22 can be continuously controlled with high precision. Therefore, the roll leveler 1 that detects the amount of tarumi by ultrasonic waves has a wider range of choices for the plate material A that can be straightened, and realizes an extremely versatile material straightening device.

Further, at the tip of the ultrasonic displacement sensor 30, a trumpet-shaped sound collecting portion 36 having a quadrangular pyramid shape which is widened toward the talumi portion R is fixed. The sound wave emitting portion 31 and the ultrasonic wave detecting portion 32 are exposed. Therefore, even if the surface of the plate material A is extremely uneven, such as the lead frame F, the sound collection property of ultrasonic waves can be enhanced, and reliable ultrasonic wave detection can be performed.

The roll leveler according to the present invention is not limited to the above embodiment. For example, the sound collecting unit 36
May have a truncated cone shape. Also, ultrasonic waves
The material A may be applied from directly below.

[0025]

Since the roll leveler according to the present invention is constructed as described above, the following effects can be obtained. That is, the upper roller and the lower roller arranged in parallel are driven by a motor, and the strip-shaped material is inserted between the upper roller and the lower roller, and in the roll leveler for straightening the material, A roll with high versatility by including an ultrasonic wave emitting unit for emitting ultrasonic waves in a vertical direction toward the plane side of the curved talmi portion and an ultrasonic wave detecting unit for detecting ultrasonic waves reflected by the plate material. Enables levelers.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a roll leveler according to the present invention.

FIG. 2 is an enlarged view of a main part of the roll leveler shown in FIG.

3 is a front view of a roller applied to the roll leveler shown in FIG. 1. FIG.

FIG. 4 is an enlarged view of a portion P surrounded by the alternate long and short dash line in FIG.

FIG. 5 is an enlarged view of a main part of FIG.

FIG. 6 is an enlarged perspective view of an essential part of the roll leveler shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Roll leveler, 21 ... Upper roller, 22 ... Lower roller, 21a, 22a ... Processing part, 21b, 22b ... Relief part, 25 ... Motor, 29 ... Feed pitch hole, 30 ... Ultrasonic displacement sensor, 31 ... Ultrasonic wave Emitting part, 32 ... Ultrasonic wave detecting part, 36 ... Sound collecting part, R ... Talumi part, A ... Plate material (material).

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F068 AA01 AA06 BB05 CC15 DD11                       FF02 FF12 MM15                 4E003 AA02                 4E026 EA12

Claims (3)

[Claims] 1. A roll leveler for straightening the material by driving an upper roller and a lower roller arranged in parallel by a motor to insert a belt-shaped material between the upper roller and the lower roller, the material comprising: Toward the plane side of the curved Talmi portion of the material to appear after correction of, the ultrasonic wave emitting unit for emitting ultrasonic waves in the vertical direction, and an ultrasonic wave detecting unit for detecting the ultrasonic waves reflected by the plate material. A roll leveler characterized by that. 2. A trumpet-shaped sound collecting section that is widened toward the talmi portion is provided at the tip end of an ultrasonic displacement sensor including the ultrasonic wave emitting section and the ultrasonic wave detecting section. The roll leveler according to claim 1, wherein: 3. A processed portion that comes into contact with the surface of the material and a relief portion that does not come into contact with the surface of the material are provided on at least one peripheral surface of the upper roller and the lower roller. The roll leveler according to claim 1 or 2.