JP2019118951A - Reference positioning method of ATC in press brake and press brake - Google Patents

Abstract

To provide a reference positioning method of left and right ATCs arranged at upper and lower tables in a press brake, and the press brake.SOLUTION: Upper and lower tables 5U, 5L having metal mold attachment parts 9U, 9L are arranged so as to oppose each other in a vertical direction, upper and lower ATCs 13UL, 13UR, 13LL and 13LR for exchanging the attachment/detachment of metal molds P, D to/from the metal mold attachment parts 9U, 9L are arranged along the metal mold attachment parts 9U, 9L so as to be movable in left and right directions, metal mold holding members 15 of a pair of the left and right ATCs are made to individually abut on reference positioning members 17U, 17L arranged at left and right reference positions in the upper and lower tables 5U, 5L from left and right directions at a press brake having a pair of the left and right ATCs at the upper and lower ATCs 13UL, 13UR, 13LL and 13LR, and in the metal mold holding members 15, the left and right positions when the reference positioning members 17U, 17L abut thereon are set as the reference positions of the ATCs.SELECTED DRAWING: Figure 1

Description

  The present invention is provided with an upper and lower automatic mold changer (ATC) for attaching and detaching a mold to and from an upper and lower table in a press brake, and a press having a pair of left and right ATCs in the upper and lower ATCs. The present invention relates to a method for performing reference positioning of each ATC with respect to a reference position of the brake and a press brake. More specifically, the present invention relates to a method and press brake provided with reference setting members at reference positions of upper and lower tables in the press brake and abut each ATC from the left and right direction with respect to the reference setting member.

  The press brake has a configuration in which upper and lower tables are opposed to each other in the vertical direction, and one table is configured as a ram that can move up and down. The upper and lower ATCs are provided movably in the left and right direction along the mold mounting portion in order to attach and detach the upper and lower molds to and from the mold mounting portion in the left and right direction provided on the upper and lower tables. ing. The upper and lower ATCs are provided with a pair of left and right ATCs (see, for example, Patent Document 1).

JP, 2009-61472, A

  As described in Patent Document 1, a pair of upper and lower ATCs for attaching and detaching the upper and lower molds to and from the mold mounting portion provided on the upper and lower tables is provided in a pair. Then, the operator manually performs the reference position setting by positioning each ATC to the reference position in the upper and lower tables. Therefore, there is an individual difference depending on the skill level, and there is a problem that the reference positioning accuracy of each ATC is uneven.

The present invention has been made in view of the problems as described above, and is provided with upper and lower tables provided with a mold mounting portion vertically opposed to each other, and the upper and lower ATCs performing removal and replacement of the mold with respect to the mold mounting portion. A reference positioning method for performing reference positioning for the pair of left and right ATCs in a press brake provided so as to be movable in the left and right direction along the mold mounting portion and having a pair of left and right ATCs in the upper and lower ATCs. And
When the mold holding members in the pair of left and right ATCs are brought into contact with the reference drawing member provided at the reference position in the left and right direction in the upper and lower tables from the left and right direction, and the mold holding member abuts the reference drawing member The position in the left and right direction of is taken as the reference position in each ATC.

A press brake used for the reference positioning method,
Upper and lower tables with mold mounting parts,
Upper and lower ATCs movably provided with a pair of left and right ATCs in the left and right direction in order to carry out replacement of the molds with respect to the upper and lower mold mounting parts;
A reference member provided at a reference position on the upper and lower tables;
Abutment detection means for detecting that the mold holding members of each ATC abut on the reference setting member;
An abutment position detection unit that detects an abutment position of the mold holding member with respect to the reference setting member;
Is equipped.

  According to the present invention, each ATC is brought into contact with a reference issuing member provided at a reference position in a press brake, and based on the abutted position, the ATC takes a reference position. Therefore, there is no individual difference, and accurate reference positioning can always be performed.

1 is a schematic front view of a press brake according to an embodiment of the present invention. It is explanatory drawing of the effect | action which contact | abuts from the left-right direction with the reference | standard output member with which the metal mold | die holding member provided in each ATC on either side was equipped in the reference position, and performs reference position out. In addition, this figure is the top view which looked at the metal mold | die holding member from upper direction.

  Hereinafter, a press brake according to an embodiment of the present invention will be described using the drawings. The overall configuration of the press brake is an already well-known configuration as described in the above-mentioned Patent Document 1. However, for ease of understanding, it will be schematically described with reference to FIG.

  The press brake 1 is provided with left and right side frames 3L, 3R. An upper table 5U is provided above the side frames 3L, 3R. A lower table 5L opposite to the upper table 5U in the vertical direction (Z-axis direction) is provided below the side frames 3L and 3R. The upper table 5U is constructed of a ram mounted on the side frames 3L, 3R and moved up and down by means of an up and down operation device 7L, 7R such as a fluid pressure cylinder.

  The upper and lower tables 5U, 5L are provided with mold mounting portions 9U, 9L in the left-right direction (X-axis direction) for mounting the upper and lower molds P, D. Further, on the rear side (rear side in the Y-axis direction) of the upper and lower tables 5U, 5L, guide members 11U, 11L in the left-right direction are provided. In the upper and lower guide members 11U and 11L, upper and lower automatic mold exchanging devices (detachable and exchangeable between the molds P and D between the mold storing portion (not shown) and the mold mounting portions 9U and 9L) ATC) 13U, 13L are provided.

  The upper and lower ATCs 13U and 13L are respectively provided with a pair of left and right ATCs 13UL, 13UR, 13LL, and 13LR movable in the left-right direction along the upper and lower guide members 11U and 11L. The respective ATCs 13UL, 13UR and 13LL, 13LR can be individually moved and positioned in the left-right direction by individually driving servomotors (not shown) individually provided. The configurations of the ATCs 13UL, 13UR and 13LL, 13LR are known, for example, as described in WO 00/41824. Therefore, the detailed description of the configuration of each ATC is omitted. Each of the ATCs 13UL, 13UR, 13LL, 13LR is provided with a mold holding member 15 which can be engaged with an engagement hole (not shown) provided in each of the molds P, D.

  The mold holding member 15 is movable (advancing and retracting in the longitudinal direction (Y-axis direction, a direction perpendicular to the paper surface in FIG. 1) to engage and disengage with the engagement holes provided in the respective molds P and D) Free). Therefore, when the mold holding member 15 is held in a state of holding the molds P and D (for example, as shown in FIG. 2A) and moved in the left-right direction, the mold holding member 15 The numeral 15 is for abutting against the molds P and D mounted on the mold mounting portions 9U and 9L from the left and right direction. That is, the mold holding member 15 doubles as an abutting member in which the ATC abuts on the reference positioning members 17U and 17L described later.

  In order to position each of the ATCs 13UL, 13UR and 13LL, 13LR at a reference position and perform reference position positioning, reference is made to the upper and lower reference at the central part of the mold mounting portions 9U and 9L in the upper and lower tables 5U, 5L. The extension members 17U and 17L are detachably provided. More specifically, mounting holes 19U and 19L as an example of mounting portions for mounting the reference drawing members 17U and 17L are provided at center portions in the left-right direction of the mold mounting portions 9U and 9L.

  The base end portions of the reference locating members 17U and 17L are detachably attached. The reference positioning members 17U and 17L are configured in a pin shape having a circular cross-sectional shape. Therefore, the mounting holes 19U and 19L can be attached to and detached from the mounting holes 19U and 19L without regard to the directivity of the reference setting members 17U and 17L.

  In the above configuration, in order to perform reference of each ATC 13UL (13LL), 13UR (13LR), the molds P, D mounted on the mold mounting portions 9U, 9L of the upper and lower tables 5U, 5L are removed . Then, the upper and lower reference members 17U and 17L are mounted and fixed vertically in the mounting holes 19U and 19L. Then, each of the ATCs 13UL (13LL) and 13UR (13LR) is moved from the initial position to a position close to the reference outputting members 17U and 17L. Then, as shown in FIG. 2A, the mold holding member 15 as an example of the contact member provided on each of the left and right ATCs 13UL (13LL) and 13UR (13LR) is held in a state of holding the mold. Holds the reference change members 17U and 17L from the left and right direction at a low speed set in advance in consideration of the torque change detection described later and the influence of the amount of coasting of the ATC 13UL (13LL) and 13UR (13LR). Abut. Then, the contact position is detected. The mold holding member 15 is not necessarily limited to the state of holding the mold, but may be in a state of abutting on the mold holding member 15.

  At this time, in the first reference positioning method, as shown in FIGS. 2B and 2C, the mold holding member 15 in the left and right ATCs 13UL (13LL) and 13UR (13LR) with respect to the reference positioning members 17U and 17L. The contact is made separately, with different contact times. And, whether or not the ATC 13UL (13LL), 13UR (13LR) abuts on the reference positioning members 17U, 17L is detected by a servomotor (not shown) for moving the ATC 13UL (13LL), 13UR (13LR) Can be detected by detecting the torque change of.

  It can also be detected by detecting that the output cycle of pulses from a rotary encoder (not shown) provided in the servomotor is longer than a preset cycle. Furthermore, the mold holding member 15 may be provided with an acceleration sensor to detect an impact at the time of contact. That is, various means can be adopted as means for detecting the contact of the ATCs 13UL (13LL) and 13UR (13LR) with the reference setting members 17U and 17L.

  By the way, since the left and right ATCs 13UL (13LL), 13UR (13LR) with respect to the reference member 17U, 17L are different at the time of contact, when one ATC 13UL (13LL) is in contact, the other ATC 13UR (13LR) There is no influence of, for example, vibration due to contact.

  As described above, the position at which the mold holding member 15 in each ATC 13UL (13LL), 13UR (13LR) abuts on the reference issuing member 17U, 17L is the reference in the left-right direction in each ATC 13UL (13LL), 13UR (13LR) It is a position.

  The second reference positioning method is as follows. That is, in order to set the reference position in the left-right direction of each ATC 13UL (13LL), 13UR (13LR), as shown in FIG. 2 (d), the contact detection of ATC 13UL (13LL), 13UR (13LR) on the left and right is detected. Move to the position simultaneously from the left and right direction, turn off the servo and check the position. Here, the position confirmation is performed with the servo off in order to avoid mutual influence such as vibration when the left and right ATCs 13UL (13LL), 13UR (13LR) abut against the reference positioning members 17U, 17L. Thereafter, the respective mold holding members 15 are retracted, and the respective ATCs 13UL (13LL) and 13UR (13LR) are returned to the initial positions in the left-right direction. Then, the upper and lower reference members 17U and 17L are removed from the upper and lower tables 5U and 5L.

  By the way, the present invention is not limited to the embodiment described above, and can be implemented in other forms by making appropriate changes. That is, in the above description, it has been described that the reference setting members 17U and 17L are attached to and detached from the mounting holes 19U and 19L provided in the upper and lower tables 5U and 5L. However, the reference positioning members 17U and 17L can be vertically pivoted or vertically movable with respect to the upper and lower tables 5U and 5L, and can be configured to protrude to the reference position when the reference positioning is performed. It is.

  Further, the abutment for the reference locating members 17U and 17L is performed by replacing the mold holding member 15 provided for each ATC with an abutment member capable of abutting against the reference locating members 17U and 17L from the left and right direction. A separately provided configuration is also possible.

  As understood from the above description, according to the present embodiment, the mold holding member provided in each ATC 13UL (13LL), 13UR (13LR) with respect to the reference positioning members 17U, 17L provided in the reference position. The reference position 15 is brought into contact separately from the left and right direction. Therefore, accurate and reproducible reference positioning can be performed automatically under optimized conditions.

1 Press brake 5U, 5L Table 9U, 9L Mold mounting part 11U, 11L Guide member 13U, 13L ATC
15 Mold holding member 17U, 17L Reference member 19U, 19L Mounting hole P, D Upper and lower molds

Claims (5)

Upper and lower tables provided with a mold mounting unit are vertically opposed to each other, and upper and lower ATCs for carrying out replacement and removal of the mold with respect to the mold mounting unit are movable in the lateral direction along the mold mounting unit. And, in a press brake provided with a pair of left and right ATCs in the upper and lower ATCs, it is a reference positioning method for performing reference positioning of the pair of left and right ATCs,
When the mold holding members in the pair of left and right ATCs are brought into contact with the reference drawing member provided at the reference position in the left and right direction in the upper and lower tables from the left and right direction, and the mold holding member abuts the reference drawing member A reference positioning method characterized in that the position in the left and right direction of is set as a reference position in each ATC.   The reference positioning method according to claim 1, wherein the contact of the mold holding members at the left and right ATCs with the reference setting member is performed separately for the left and right.   The reference positioning method according to claim 1 or 2, wherein the reference positioning in the pair of left and right ATCs in the upper and lower tables is simultaneously performed in the vertical direction. A press brake used in the reference positioning method according to claim 1, 2 or 3,
Upper and lower tables with mold mounting parts,
Upper and lower ATCs movably provided with a pair of left and right ATCs in the left and right direction in order to carry out replacement of the molds with respect to the upper and lower mold mounting parts;
A reference member provided at a reference position on the upper and lower tables;
Abutment detection means for detecting that the mold holding members of each ATC abut on the reference setting member;
An abutment position detection unit that detects an abutment position of the mold holding member with respect to the reference setting member;
The press brake characterized by having.   The press brake according to claim 4, wherein the reference setting members are detachably provided at reference positions on the upper and lower tables.

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