JPH06262265A - Bending angle measuring instrument - Google Patents

Abstract

PURPOSE:To provide a bending angle measuring instrument by which a bending angle of a bent work can be highly precisely measured considering the positional information of both sides, not only one side positional information. CONSTITUTION:The instrument is composed of a 1st supporting member 7 supporting one side WA of a bent work W, a 2nd supporting member 9 erected at a side of the 1st supporting member 7. An abutting member 23 provided to be freely rotatable in the 2nd supporting member 9 in order to abut it on the other side WB adjacent to one side WA of the work W, and angle detecting unites 25, 35, 39 detecting the angle of the work until a state being brought in contact with the other side by rotating the abutting members 23 from a pre-set position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending angle measuring device for measuring an angle of a work bent by a press brake or the like.

[0002]

2. Description of the Related Art Conventionally, a work is bent by a press brake or the like. And, many applications have been made up to now for a bending angle measuring device for measuring the angle of a bent work.

As a typical one of them, firstly,
One side of the bent work is placed and supported on, for example, a table, and the other side of the work is moved by the operation of the air cylinder so that the tip of the link bar abuts. The bending angle of the work is measured by detecting the amount of movement of the link bar when the tip of the link bar comes into contact with the work with a rack and pinion or an encoder.

Secondly, a bending angle of the work is measured by disposing a CCD camera or the like on one side of the bent work, photographing the bending state of the work with this CCD camera, and performing image processing. ing.

Thirdly, for example, a laser oscillator or the like is arranged on one side of the bent work piece, and one side of the work piece is irradiated with a laser beam from the laser oscillator and the reflected light of the laser beam is received. The bending angle of the workpiece is measured.

[0006]

By the way, of the above-mentioned conventional techniques, the first means is restricted by the measurable bending length, and the accuracy of the bending angle is improved due to the positional information of only one side that is bent. It cannot be obtained with high precision. Further, there are various problems that the entire apparatus is expensive and that the work is deformed when the work is thin.

With the second means, the bending angle cannot be obtained with high accuracy as in the first means. In addition, there are restrictions on the shape such as through bending, and the device itself is expensive. In the third means, the bending angle accuracy cannot be obtained with high accuracy because the position information of only one side is bent as in the first means, and the apparatus itself is expensive.

In order to solve the above problems, the object of the present invention is to obtain the bending angle of a bent work piece with high accuracy by considering not only the position information of only one side but also the position states of both sides. An object of the present invention is to provide a bending angle measuring device.

[0009]

In order to achieve the above object, the present invention provides a first support member for supporting one side of a bent work, and a standing member provided on one side of the first support member. A contact member rotatably provided with respect to the second support member so as to contact the other side adjacent to one side of the work with the second support member, and this contact member is set in advance. A bending angle measuring device is configured by including an angle detector that detects an angle from a position where the workpiece is rotated to contact with the other side of the work.

In the bending angle measuring device, it is desirable that the first supporting member and the second supporting member are integrated, or that the second supporting member is movable with respect to the first supporting member. It is a thing. Further, in the bending angle measuring device, first and second suction means for surely supporting and abutting one side of the bent work on the first support member and the other side of the work on the abutting member. Be prepared,
And a first and second confirmation sensor for confirming that one side of the bent work is adsorbed by the first support member and the other side of the work is adsorbed by the contact member by the first and second suction means. Is desirable.

[0011]

By using the bending angle measuring device of the present invention, one side of the bent work is supported on the first supporting member. At this time, the first suction means is operated so that one side of the work is suction-supported by the first support member. This suction support is confirmed by the first confirmation sensor. With one side of the work adsorbed and supported on the first support member, the contact member provided on the first support member is rotated from a preset setting position so that the contact member contacts the other side of the work. Contact me. In this contact state, the second suction means is operated to suck the contact member to the other side of the work. Moreover, it is confirmed by the second confirmation sensor whether or not it is adsorbed.

The angle detector detects the amount of rotation, that is, the angle when the contact member is brought into contact with the other side of the work. The bending angle in the actual work can be accurately measured by adding and subtracting the angle detected by this angle detector from the origin angle of the preset position.

[0013]

Embodiments of the present invention will be described in detail below with reference to the drawings.

With reference to FIGS. 1, 2 and 3, the bending angle measuring apparatus 1 is provided with a base 3, and a protrusion 5 is provided at the front and rear of the base 3 at the left end, for example. Has been. A first support member 7 extending in the X-axis direction (left-right direction in FIGS. 1, 2, and 3) is provided between the protrusions 5.
And the second support member 9 are integrally provided. Moreover, the left side portion of the first support member 7 is pivotally supported by the pin 11 and the spring 13 is provided below the right side portion of the second support member 9, and the first support member 7 is provided. Is urged upward so that the upper surface of is always horizontal.

The chamber 1 is formed on the upper surface of the first supporting member 7.
5 is formed, and one end of an air passage 17 is communicated with the chamber 15. This air passage 17
Are formed so as to penetrate vertically in the first support member 7.

The second support member 9 is composed of a horizontal portion 19 integrated with the first support member 7 and a vertical portion 21 provided upright on the horizontal portion 19. The vertical portion 21 has a U-shape and is composed of the base portion 21A and the arms 21B and 21C. A fan-shaped contact member 23 is provided between the arms 21B and 21C, and the contact member 23A for contacting the other side of the work W with the contact member 23.
And the sector gear 25 is formed on the outer peripheral portion. Moreover, the contact member 23 is rotatably supported by the vertical portion 21 of the second support member 9 by the pin 27.

A chamber 29 is formed on the upper surface of the contact portion 23A of the contact member 23, and one end of an air passage 31 communicates with the chamber 29. The air passage 31 is formed so as to penetrate through the contact member 23.

The vertical portion 21 of the second support member 9
A mounting base 33 is attached to, for example, the arm 21B. An encoder 35 as an angle detector is provided on the mounting base 33, and a pinion 39 is attached to an output shaft 37 of the encoder 35.
Moreover, the sector gear 25 is meshed with the pinion 39.

As shown in FIG. 2, the contact member 23 is formed with a long hole 41 and the long hole 4 is formed.
A pin 43 is fitted into the device 1. Also, the arm 2
Another pin 45 is attached to 1C.
5 and the pin 43 are provided with springs 47, as shown in FIG. Moreover, the biasing force of the spring 47 causes the contact portion 23A of the contact member 23 to be in a neutral state at a preset position, for example, at an angle of 90 degrees (vertical state).

With the above structure, when one side W _A of the bent work W is supported by the first supporting member 7 and moved rightward in FIG. 2, the lower part of the other side W _B of the work W contacts the contact member. 23 in contact, by allowed to move further to the right, clockwise direction in FIG. 2 the contact member 23 is a pin 27 as a fulcrum, or is rotated in the counter clockwise direction, the other side W _B in the work W Abutting member 23 on the entire surface
The contact portion 23A comes into contact. In this state, the air passage 17,
When air is sucked from 31, the one side W _A of the work W contacts the first support member 7 and the other side W _B of the work W contacts the contact member 23.
The contact portion 23A is reliably supported and abutted.

When the contact member 23 rotates, the sector gear 25 also rotates in the same direction as the contact member 23. Therefore, the encoder 35 operates by the pinion 39 and the output shaft 37 to count the contact member 23. The rotation amount of 23, that is, the rotation angle is detected. As a result, the bending angle θ of the work W is calculated by adding / subtracting the detected actual rotation angle to / from the preset setting angle (for example, 90 degrees) at the preset position of the contact member 23, for example, the vertical position. It can be measured with high accuracy.

FIGS. 4 and 5 show another embodiment which is an alternative to the above-mentioned embodiment. 4 and 5, the same parts as those in FIGS. 1, 2 and 3 are designated by the same reference numerals and different points will be described.

That is, in FIGS. 4 and 5, the first
The support member 7 and the horizontal portion 19 of the second support member 9 are not integrated but separated. An LM guide member 49 is provided in the lower portion of the first support member 7 from the center to the right in FIG. On the LM guide member 49, the horizontal portion 19 of the second support member 9 movable in the left-right direction in FIG. 4 is provided.

With the above structure, one side W _{A of the} work W is placed and supported on the first support member 7, and the air passage 1 is provided.
By sucking from 7 side W _{A of} work W
Are adsorbed and fixed to the first support member 7. In this state, the horizontal portion 19 of the second support member 9 is fixed to the LM guide member 4
Is guided by for moving from right to left in FIG. 4 to 9, is rotated while abutting on the abutting portion 23A of the other side W _B is the contact member 23 of the workpiece W, the other in the work W side W _B In the state where the contact portion 23A of the contact member 23 is in contact with the entire surface of, the air is sucked and adsorbed from the air passage 31. The amount of movement of the contact member 23 in this state, that is, the rotation angle, can be detected in the same manner as in the above-described embodiment, and the bending angle of the work W can be measured with high accuracy.

FIG. 6 shows an air system diagram. Figure 6
In, the one end of the pipe 51 is connected to the other end of the air passage 17, and the vacuum generator 53 is connected to the other end of the pipe 51. A pipe 55 is provided in the middle of the pipe 51.
A pressure switch 57 is provided via the.

One end of a pipe 59 is connected to the other end of the air passage 31, and a vacuum generator 61 is connected to the other end of the pipe 59. In the middle of the pipe 59, the pipe 63
A pressure switch 65 is provided via the. An arithmetic processing unit 67 is connected to the encoder 35, and an input unit 69 and an output unit 71 are connected to the arithmetic processing unit 67, respectively.

With the above structure, the operation of the air system will be described with reference to the flow chart shown in FIG. 7. One side W _A of the bent work W is supported on the first support member 7 to the right in FIG. After moving, the vacuum generator 53 is operated to suck air, and when the pressure switch 57 is turned on in step S71, the encoder 35 is operated in step S72.
Is determined to be normal rotation or reverse rotation. If the encoder 35 is normal rotation, the encoder 35 counts up in step S73, and if it is reverse rotation, the encoder 35 counts down in step S74. Then, step S75
Then, the vacuum generator 61 is operated to suck air, and it is determined whether the other side W _B of the work W is adsorbed by the contact portion 23A of the contact member 23 by turning on the pressure switch 65, and then in step S76. The encoder 35 stops and the count value is taken in by the arithmetic processing unit 67. Since a set value, for example, 90 degrees, is previously input to the arithmetic processing device 67 by the input means 69, the bending angle of the workpiece can be highly accurately determined in step S77 based on the set value and the actually detected turning angle. It can be measured and output by the output means 71.

As described above, in this embodiment, one side W _A of the bent work W is used as the first support member 7 and the other side W _{A.
Since the state in which B} is accurately brought into close contact with the contact portion 23A of the contact member 23 is confirmed, the bending angle can be measured with high accuracy.

The bending angle measuring apparatus 1 is not directly fixed to the press brake but is installed near the press brake or mounted on a back gauge or the like.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0031]

As can be understood from the above description of the embodiments, according to the present invention, since the construction is as described in the claims, both sides of a bent work piece can be accurately measured. Since the bending angle can be measured in a state of being sucked and held, it is possible to measure the bending angle with high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view of a bending angle measuring device showing an embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a perspective view of another embodiment alternative to FIG.

5 is a cross-sectional view taken along line VV in FIG.

6 is a diagram showing an air system in FIG. 1. FIG.

FIG. 7 is a flowchart showing an operation in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bending angle measuring device 3 Base 7 1st supporting member 9 2nd supporting member 15,29 Chamber 17,31 Air passage 23 Contact member 23A Contact part 25 Sector gear 35 Encoder 39 Pinion

Claims (5)

[Claims] 1. A first support member for supporting one side of a bent work, a second support member standing on one side of the first support member, and another side adjacent to the one side of the work. A contact member rotatably provided with respect to the second support member in order to bring it into contact with the second support member, and a state in which the contact member is rotated from a preset position to contact the other side of the work. A bending angle measuring device, comprising: an angle detector for detecting an angle. 2. The bending angle measuring device according to claim 1, wherein the first supporting member and the second supporting member are integrated. 3. The bending angle measuring device according to claim 1, wherein the second supporting member is movable with respect to the first supporting member. 4. A first and a second suction means for surely supporting and abutting one side of the bent work on the first support member and the other side of the work on the abutting member, respectively. The bending angle measuring device according to claim 1, 2, or 3. 5. The first and second confirmation for confirming that one side of the bent work is adsorbed by the first supporting member and the other side of the work is adsorbed by the abutting member by the first and second suction means. The bending angle measuring apparatus according to claim 4, further comprising a sensor.