JP2017140640A - Bending angle detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bending angle detecting device which has a cleaning function for removing iron powder produced by scrubbing between a work-piece and an upper mold or a lower mold, has a dustproof function for blocking entry of the iron powder and, thereby, can measure a bending angle of the work-piece accurately.SOLUTION: When a detector main body 7 is vertically moved while an opening part 11 of a case 9 is closed by a brush implanting body 10 as it is, such a brush B that the detector main body 7 constitutes a brush implanting body 10 is protruded, thereby, the detector main body 7 removes iron powder T with which the detector main body is brought into contact, being attached to the vertically moving detector main body 7 side, when the detector main body 7 is standby, the detector main body 7 is arranged on the lower side of the brush B and, thereby, the iron powder T is protected by the brush B and prevents the entry into the case 9.SELECTED DRAWING: Figure 1

Description

  The present invention eliminates inconvenience due to iron powder generated by rubbing between a workpiece and an upper die or a lower die, in particular, a device for detecting a bending angle of a workpiece bent by a bending machine such as a press brake. The present invention relates to a bending angle detection device.

  Conventionally, as an apparatus for detecting a bending angle of a workpiece bent by a press brake, for example, there is one disclosed in Japanese Patent Laid-Open No. 2006-205256 (Patent Document 1 described later).

  As the bending angle detection device disclosed in Patent Document 1, a device that mechanically detects the bending angle (FIG. 1 and the like of Patent Document 1) and a device that optically detects the bending angle (of Patent Document 1). 10) and the like.

  Among these, a device (such as FIG. 1 of Patent Document 1) that mechanically detects a bending angle is a side surface of a die D that is a lower mold having a housing 109 included in a detector main body 103 (FIG. 1 of Patent Document 1). The bending angle of 180 ° −θ11−θ13 is detected while the contacts 137 and 139 (FIG. 4 of Patent Document 1) incorporated in the housing 109 are brought into contact with the back surface of the workpiece W in a state where they are fixed in contact with each other. This is a so-called contact type angle sensor.

JP 2006-205256 A

  However, the contact-type angle sensor that is a device (such as FIG. 1 of Patent Document 1) that mechanically detects the bending angle has the following problems.

  That is, as shown in FIG. 12 of the present application, the contact-type angle sensor is structurally provided with a detector main body including a contactor so as to be movable up and down.

  Therefore, the detector body is exposed in the air and cannot be covered with a cover or the like in order to ensure the vertical movement.

  However, when the bending angle is detected (for example, FIG. 4 of Patent Document 1), iron powder generated by rubbing between the workpiece and the upper die or the lower die, for example, the die when the workpiece is bent is detected by the detector. Get down to the main body.

  And when the said iron powder (FIG. 12 of this application) falls on the detector main body side for a long time, it may accumulate on this detector main body and may interfere with a bending angle detection operation | movement.

  For example, if iron powder adheres to the rotation axis CL3 between the support member 119 (FIG. 4 of Patent Document 1) and the housing 109 of the detector main body 103, and the biasing springs 143 and 145 of the contacts 137 and 139. The operation of the entire detector body 103 becomes unstable, and the bending angle 180 ° −θ11−θ13 cannot be accurately detected).

  In addition, the workpiece may be bent in a state where the contact angle sensor is disposed at the workpiece bending position, but even in this case, the iron powder generated by rubbing between the workpiece and the die is It falls on the detector body side including the contact.

  That is, even when the bending angle is not detected and is on standby, iron powder may fall on the detector body.

  As a result, the operation of the detector body may be hindered due to the iron powder, and an alarm will sound each time it becomes very unstable, and there is a risk that it will not be possible to concentrate on bending with peace of mind. If iron powder enters and accumulates inside the main body, cleaning with an air gun or the like causes convection of the iron powder inside the detector main body and further causes malfunction.

  An object of the present invention is to provide a workpiece bending angle detecting device in a bending machine such as a press brake that performs bending of a workpiece by cooperation of an upper die and a lower die, and the workpiece and the upper die or the lower die. Provided is a bending angle detection device capable of accurately measuring the bending angle of a workpiece by having a cleaning function for removing iron powder generated by rubbing and a dustproof function for preventing entry of the iron powder. .

In order to solve the above-mentioned problem, the present invention provides, as described in claim 1,
A workpiece bending angle detecting device 5 used in a bending machine 1 for bending a workpiece W by cooperation of an upper die P (FIG. 1) and a lower die D, and a housing in which a contact 8 is built. It is possible to detect the bending angle of the workpiece W through the contact 8 in a state in which the body 6 is provided and the casing 6 is in contact with and fixed to the contacted portion of the upper mold P or the lower mold D. In the bending angle detection device 5 having the detector body 7,
A brush B that removes and protects the iron powder T generated by rubbing between the workpiece W and the upper mold P or the lower mold D is provided in an opening portion 11 of the case 9 in which the detector body 7 is provided to be movable up and down. When the detector body 7 is moved up and down while the brush cover 10 is attached so that the implanted brush cover 10 can be opened and closed, the detector body 7 protrudes from the brush B so that the brush B The iron powder T adhering to the detector body 7 that moves up and down in contact therewith is removed, and when the detector body 7 is on standby, the detector body 7 is disposed below the brush B, whereby the iron powder T Is protected by the brush B to prevent mixing into the case 9, a technical means of the bending angle detection device 5 is provided.

  According to the configuration of the present invention, if the brush planting region of the brush cover 10 is configured, for example, in at least two parts (FIGS. 8 and 9), the detector body 7 is located between the brushes B on both sides with respect to the center line C. The iron powder T adhering to the detector main body 7 side is removed by the brush B while moving up and down (FIG. 10), and the detector main body 7 is located below the brush B (FIG. 11) in the case 9. If it is waiting inside, the iron powder T is protected by the brush B and the entry into the case 9 is prevented.

  Therefore, according to the present invention, in a workpiece bending angle detection device in a bending machine such as a press brake that performs bending of a workpiece by cooperation of an upper die and a lower die, the workpiece and the upper die or the lower die Bending angle detection device capable of accurately measuring the bending angle of a workpiece by having a cleaning function for removing iron powder generated by rubbing with a mold and a dustproof function for preventing the entry of the iron powder. There is an effect of providing.

1 is an overall view of a bending machine 1 to which the present invention is applied. It is a front view of FIG. It is a figure which shows the relationship between the bending angle detection apparatus 5 and the bending machine 1 which concern on this invention. It is a figure which shows the relationship between the bending angle detection apparatus 5, the detector main body 7, and the iron powder T which concern on this invention. 1 is an overall view of a bending angle detection device 5 according to the present invention. It is the whole view seen from the A direction of the bending angle detection apparatus 5 in FIG. It is a disassembled perspective view of the bending angle detection apparatus 5 in FIG. It is a general view in case brush installation area | region BS1 and BS2 in the brush cover 10 in which the brush B which removes and protects the iron powder T which comprises the bending angle detection apparatus 5 which concerns on this invention was planted are divided into 2 parts. It is detail drawing of the brush cover 10 in FIG. It is operation | movement explanatory drawing at the time of the vertical motion of the detector main body 7 which comprises this invention. It is operation | movement explanatory drawing at the time of the standby of the detector main body 7 which comprises this invention. It is explanatory drawing of a prior art.

  FIG. 1 is an overall view of a press brake as an example of a bending machine 1 to which the present invention is applied.

  The press brake has side plates 29 on both sides of the machine body, and an upper table 20 that is a ram is attached to the upper portion of the side plate 29 via ram drive sources (for example, hydraulic cylinders, electric motors, etc.) 12 and 13. A punch holder 19 is attached to the upper table 20, and a punch P as an upper die is attached to the punch holder 19.

  An operation panel 18 connected to the control unit 2 attached to the side plate 29 is movably provided on the upper table 20. For example, a bending die, a punch P used for each bending order, a die composed of a die D, and the like are provided. Are displayed on the screen of the operation panel 18.

  A lower table 21 is disposed below the side plate 29, and a lower die D is mounted on the lower table 21 via a die holder 22.

  That is, the press brake of FIG. 1 is a descending press brake, and after the operator S abuts the workpiece W against the back gauge abutment 23 disposed behind the lower table 21, the foot pedal 4 is positioned. Then, the ram drive sources 12 and 13 described above are operated, and when the upper table 20 is lowered, the workpiece W is bent by the cooperation of the punch P and the die D.

  Further, the press brake of FIG. 1 may be a lift press brake in which the workpiece W is bent by the cooperation of the punch P and the die D when the lower table 21 is lifted.

  Further, the lower table 21 is provided with a rail 3 along the longitudinal direction (X-axis direction) of the machine body, and a bending angle detection device 5 (FIG. 3) described later is slidably coupled to the rail. .

  Then, by the control unit 2 (FIG. 1) described above, for example, based on CAD (Computer Aided Design) information, a bending order, a mold, a mold layout, a processing position (work position), and the like are determined in advance before starting the processing. (Step S101 in FIG. 6 of Patent Document 1), the operator S (FIG. 1) holding the workpiece W is arranged along the longitudinal direction (X-axis direction) of the machine body in each bending order in the processing station st1 (FIG. 2) In step bend processing in which bending is performed while moving to st2,..., The bending angle detection device 5 can be freely positioned at the processing position (work position) (step S107 in FIG. 6 of Patent Document 1). .

  At each processing position, when the punch P is lowered and temporarily stops at the pinching point, the detector body 7 is raised and the housing 6 is in contact with the contacted portion which is the side surface of the die D and fixed. (FIG. 4 of Patent Document 1), the punch P is lowered again, the workpiece W is bent in cooperation with the die D, and the bending angle is detected through the contact 8 that contacts the back surface of the workpiece W. (Steps S109 to S125 in FIG. 6 of Patent Document 1), the iron powder T generated at that time is removed and protected by the brush B implanted in the brush cover 10 as described later (FIGS. 10 to 11). By doing so, the effect of the present invention is achieved.

  As shown in FIG. 4, the iron powder T is generated by rubbing between a workpiece W (particularly, a black leather material) being processed and an upper die or a lower die, for example, a die D.

  When the iron powder T adheres to and accumulates on the detector body 7 side, that is, on the support body 26, the housing 5 attached to the piston rod 27, and the entire detector body 7 such as the contact 8, the bending angle is increased. Since it cannot be detected accurately, according to the present invention, measures such as removal of iron powder T by the brush B are taken (FIGS. 10 to 11), and the accuracy of the bending angle is improved.

  As shown in FIG. 3, the bending angle detection device 5 is arranged on the worker S side (left side) and the back gauge side (right side), and is detected by the bending angle detection device 5 on the worker S side (left side). The actual bending angle θ15 = 180 ° −θ11−θ13 of the workpiece can be obtained from the bending angle θ11 and the bending angle θ13 detected by the bending angle detection device 5 on the back gauge side (right side) (for details, see Patent). (See paragraph numbers 0076 to 0080 and FIGS. 2 to 4 of Document 1).

  Further, as described above, the entire bending angle detection device 5 (FIG. 1) is movable in the longitudinal direction of the machine body, that is, in the left-right direction (X-axis direction), and can be positioned at the processing position. Further, the detector body 7 is movable in the vertical direction (Z-axis direction), and the bending angle detection operation is conventionally known, and detailed description thereof is omitted (paragraph numbers 0032 to (See the operation of the first moving means 111 and the second moving means 113 shown in FIGS. 1 to 5, paragraph numbers 0082 to 0100, and the bending machine 101 shown in FIGS. 6 to 7).

  On the other hand, as shown in FIGS. 4 to 7, the bending angle detection device 5 is a case 9 (roller guide 123 indicated by a broken line in Patent Document 1 (paragraph number 0055) that covers a detector main body 7 and the like incorporated therein. Equivalent to FIG. 2).

  An opening 11 is formed in the case 9 (FIG. 4), and a brush cover 10 in which a brush B for removing and protecting the iron powder T is implanted is provided in the opening 11 so as to be freely opened and closed. .

  More specifically, as shown in FIG. 5, the opening 11 of the case 9 is formed at an outermost oblique portion 11A, a horizontal portion 11B continuous therewith, and slightly below the horizontal portion 11B. It is comprised by 11 C of square shape parts.

  In other words, the opening 11 of the case 9 is composed of an oblique portion 11A, a horizontal portion 11B, and a square portion 11C.

  An opening / closing member 25 is provided via a hinge 24 on the vertical wall 9A connected to the lower portion of the oblique portion 11A constituting the opening 11.

  The opening / closing member 25 includes a first opening / closing member 25A corresponding to the oblique portion 11A of the opening 11 and a second opening / closing member 25B corresponding to the horizontal portion 11B of the opening 11, and the second opening / closing member 25B includes an opening. A brush cover 10 corresponding to the cruciform portion 11 </ b> C of the portion 11 is provided.

  The brush cover 10 has its brush planting areas BS1, BS2, BS3, BS4 divided into four.

  However, as will be described later (FIGS. 8 to 9), if the brush planting area is composed of at least two divided BS1 and BS2, the effect of the present invention of removing and protecting the iron powder T can be achieved. (FIGS. 10 to 11).

  As shown in FIG. 7, the brush cover 10 is generally formed in a letter-like shape so as to correspond to the letter-like part 11 </ b> C constituting the opening 11 of the case 9.

  The brush cover 10 has frames 14, 15, 16, and 17 in which the brush B is implanted, as shown in the figure, and the frames 14, 15, 16, and 17 are sandwiched between brush pressers 34 and 35. The brush holders 34 and 35 are fixed to the fixing members 32 and 33 attached to the opening / closing member 25 with bolts 30 and 31.

  In FIG. 7, the opposed frames 14 and 15 on the front side are sandwiched between the holding parts 34a and 35a having a U-shaped cross section of the front brush holders 34A and 35A of the brush holders 34 and 35, and are opposed to each other at a distance. The frames 16 and 17 are sandwiched between clamping portions 34b and 35b having a U-shaped cross section between the brush pressing portions 34B and 35B of the brush pressing portions 34 and 35, which are distant from each other.

  Thereafter, if the brush holders 34 and 35 sandwiching the frames 14, 15, 16, and 17 are screwed into the fixing members 32 and 33 as described above, the brush planting regions BS1, BS2, BS3, and BS4 are four. The brush cover 10 constituted by division is formed (FIGS. 4 to 7).

  However, as described above (FIGS. 8 to 9), the effect of the present invention of removing and protecting the iron powder T can be achieved if the brush planting areas BS1 and BS2 are configured by at least two divisions. (FIGS. 10 to 11).

  That is, as shown in FIG. 8, assuming that the opening 11 of the bending angle detection device 5 is very simple compared to the cases of FIGS. 4 to 7, for example, rectangular, the case 9 (FIG. 8) The opening / closing member 25 attached to the vertical wall 9A via a hinge 24 has a simpler structure and is a flat plate. The flat opening / closing member 25 is provided with a brush cover 10 in which the brush planting areas BS1 and BS2 are divided into two. It has been.

  The overall structure of the brush cover 10 in which the brush planting areas BS1 and BS2 are divided into two parts is substantially the same as that in the case of the four parts (FIGS. 4 to 7) described above.

  That is, as shown in FIG. 9, the brush cover 10 has two opposing frames 14 and 15 in which the brush B is implanted, and the two frames 14 and 15 are provided with brush pressers 34A and 35A. The clamps 34A and 35A are fixed to the fixing members 32A and 33A attached to the flat plate opening / closing member 25 (FIG. 8) with bolts 30 and 31, respectively.

  A base end B2 of one brush B is implanted in the left frame 14 of the two frames 14 and 15 (FIG. 9) of the brush cover 10, and the implanted brush B faces each other. Extending toward the right frame 15, the tip B <b> 1 is in contact with the center line C.

  Further, the base end B2 of the other brush B is planted in the right frame 15, the planted brush B extends toward the opposing left frame 14, and the distal end B1 has a center line C. Touching.

  That is, the brush B on both sides with respect to the center line C of the brush planting areas BS1 and BS2 divided into at least two is planted in the frames 14 and 15 with the base end B2 facing each other. The end portions B1 are in contact with each other.

  With this configuration, as described above, the iron powder T generated by rubbing with the die D, for example, during bending of the workpiece W (FIG. 4) is removed and protected by the brush B implanted in the brush cover 10. (FIGS. 10 to 11), the effect of the present invention is achieved.

  The operation of the present invention will be described below with reference to FIGS.

(A) Removal of iron powder T when the detector body 7 moves up and down.
That is, the bending process is started and the punch P (FIG. 1) is lowered, but is temporarily stopped at the pinching point position on the upper surface of the workpiece W, and at that time, the detector main body of the bending angle detection device 5 positioned at the processing position. 7 (FIG. 4) is raised for bending angle detection.

  For example, in FIG. 10A, when the detector main body 7 is raised, the contact 8, the casing 6, the support member 26, the piston rod 27 (FIG. 4) and the like that constitute the detector main body 7 remove the brush B. Projects upward (Z-axis direction).

  At that time, the iron B adhered to the detector main body 7 side while the brush B (FIG. 10A) on both sides is pulled up by the detector main body 7 coming into contact with the brush B and facing upward as shown in the figure. By removing the powder T and moving the iron powder T to the brush B side, the iron powder T is cleaned.

  And the iron powder T which moved to the brush B can be removed with an air gun etc. at the time of a maintenance (refer to the removal of the iron powder T at the time of (C) maintenance).

  On the contrary, after detecting the bending angle, the detector body 7 (FIG. 4) positioned at the bending angle detection position is lowered.

  At that time, as shown in FIG. 10 (B), the contact 8 constituting the detector body 7, the casing 6, the support member 26, the piston rod 27 (FIG. 4), etc. B)) Projects downward in the opposite direction.

  Then, the iron powder T attached to the detector body 7 side is removed while the brush B on both sides is pulled by the detector body 7 that comes down in contact with the brush B and faces downward, as shown in FIG. When the powder T moves to the brush B side, the iron powder T is cleaned.

  Similarly, the iron powder T transferred to the brush B can be removed with an air gun or the like during maintenance (see (C) Removal of iron powder T during maintenance).

(B) Protection of the iron powder T when the detector body 7 is on standby.
As described above, it is possible to bend the workpiece W even when the detector body 7 is on standby without detecting the bending angle, but at that time, the workpiece W and the die D are rubbed. The iron powder T generated more often falls on the detector body 7 side.

  However, as shown in FIG. 11, when the detector main body 7 is on standby, the detector main body 7 is disposed below the brush B of the brush cover 10 that closes the case 9. The iron powder T generated at this time is protected by the brush B and is prevented from entering the case 9.

  The iron powder T protected by the brush B is deposited as it is on the brush B side. Similarly (see (C) Removal of the iron powder T during maintenance), it can be removed with an air gun or the like during maintenance.

(C) Removal of iron powder T during maintenance.
When all the operations are completed, maintenance such as maintenance / inspection of the entire bending machine 1 (FIG. 1) is performed at a fixed time. At this time, maintenance of the bending angle detection device 5 according to the present invention is also performed. Done.

  At that time, the brush cover 10 that closes the opening 11 of the case 9 (FIG. 5) in which the detector main body 7 is waiting is opened during maintenance, and the iron deposited on the entire case 9 including the brush cover 10 is deposited. The powder T is removed using, for example, an air gun.

  The present invention relates to a workpiece bending angle detection device in a bending machine such as a press brake that performs bending of a workpiece by cooperation of an upper die and a lower die, and the friction between the workpiece and the upper die or the lower die. It has a cleaning function to remove the iron powder generated by the above, and has a dustproof function to prevent the entry of the iron powder, so that it can be used in a bending angle detection device that can accurately measure the bending angle of a workpiece. It is beneficial.

DESCRIPTION OF SYMBOLS 1 Bending machine 2 Control part 3 Rail 4 Foot pedal 5 Bending angle detection apparatus 6 Case 7 Detector main body 8 Contactor 9 Case 10 Brush cover 11 Opening part 12, 13 Ram drive sources 14-17 Brush B is implanted Frame 18 operation panel 19 punch holder 20 upper table 21 lower table 22 die holder 23 abutment 24 hinge 25 opening / closing member 26 support member 27 of the detector body 7 piston rod 30, 31 bolt 32, 33 brush holders 34, 35 are fixed Fixing member 34, 35 Brush holder

Claims (5)

An apparatus for detecting a bending angle of a workpiece used in a bending machine for bending a workpiece by cooperating with an upper mold and a lower mold, the housing including a housing with a built-in contact. In a bending angle detection device having a detector main body capable of detecting a bending angle of a workpiece through the contact in a state where it is in contact with and fixed to a contact portion of a mold or the lower mold,
Open and close the brush cover with a brush installed to remove and protect the iron powder generated by rubbing between the workpiece and the upper or lower mold at the opening of the case where the detector body is provided to move up and down. When the detector main body moves up and down with the brush cover closed, the detector main body protrudes the brush so that the brush comes in contact with it and moves up and down. Bending angle characterized in that the powder is removed and when the detector main body is in a standby state, the detector main body is disposed below the brush so that the iron powder is protected by the brush to prevent entry into the case. Detection device.   The bending angle detection device according to claim 1, wherein the brush planting region of the brush cover is configured by at least two parts.   The brushes on both sides with respect to the center line of the brush planting area divided into at least two parts are planted in a frame with the base ends facing each other. The planted brushes extend toward the frame of the other party, and the tip portions are separated from each other. The bending angle detection apparatus according to claim 1 or 2, which are in contact with each other.   The bending angle detection device according to claim 1, wherein the opposed frames in which brushes on both sides with respect to the center line are planted are sandwiched between brush presses fixed to an opening / closing member attached to the case.   The bending according to claim 1, wherein the iron powder deposited on the entire case including the brush cover is removed by opening the brush cover closing the opening of the case where the detector main body is waiting during maintenance. Angle detection device.

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