JP6920221B2 - ATC reference positioning method for press brakes and press brakes - Google Patents

Description

The present invention is provided in a configuration in which an upper and lower automatic die changing device (ATC) for attaching and detaching and exchanging dies to the upper and lower tables in a press brake is provided, and a pair of left and right ATCs are provided for each of the upper and lower ATCs. The present invention relates to a method of setting a reference position for each ATC with respect to a reference position of a brake and a press brake. More specifically, the present invention relates to a method in which a reference setting member is provided at a reference position of an upper and lower table in a press brake, and each ATC is brought into contact with the reference setting member from the left and right directions to perform reference positioning, and a press brake.

The press brake has a configuration in which upper and lower tables are provided so as to face each other vertically, and one table is configured as a ram that can move up and down. Then, in order to attach / detach and replace the upper and lower molds with respect to the left-right mold mounting portions provided on the upper and lower tables, the upper and lower ATCs are provided so as to be movable in the left-right direction along the mold mounting portions. ing. The upper and lower ATCs are provided with a pair of left and right ATCs (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2009-61472

As described in Patent Document 1, a pair of upper and lower ATCs for attaching and detaching and exchanging the upper and lower molds to the mold mounting portions provided on the upper and lower tables are provided, respectively. Then, the operator manually sets the reference position by positioning each ATC to the reference position on the upper and lower tables. Therefore, there is a problem that there are individual differences depending on the skill level, and the reference positioning accuracy of each ATC varies.

The present invention has been made in view of the above-mentioned problems, and the upper and lower ATCs provided with the upper and lower tables provided with the mold mounting portions facing each other vertically and the molds are attached to and detached from the mold mounting portions. In a press brake equipped with a pair of left and right ATCs on the upper and lower ATCs, which are movable in the left-right direction along the die mounting portion, a reference positioning method for positioning the pair of left and right ATCs. And
When the mold holding members in the pair of left and right ATCs are in contact with the reference setting members provided at the reference positions in the left and right directions on the upper and lower tables from the left and right directions, and the mold holding members are in contact with the reference setting members. The position in the left-right direction of is used as the reference position in each ATC.

A press brake used in the reference positioning method.
Upper and lower tables with mold mounting parts,
The upper and lower ATCs are equipped with a pair of left and right ATCs that can be moved in the left-right direction in order to attach and detach the molds to the upper and lower mold mounting parts.
A reference member for the reference position on the upper and lower tables,
A contact detecting means for detecting that the mold holding member of each ATC has come into contact with the reference setting member, and
A contact position detecting means for detecting the contact position of the mold holding member with respect to the reference setting member, and
It has.

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

It is a schematic front explanatory view of the press brake which concerns on embodiment of this invention. It is explanatory drawing of the action which abutting the mold holding member provided for each ATC on the left and right with the reference setting member provided at a reference position from the left-right direction, and performing the reference position setting. This figure is a plan view of the mold holding member as viewed from above.

Hereinafter, the press brake according to the embodiment of the present invention will be described with reference to the drawings. The overall configuration of the press brake is a well-known configuration as described in Patent Document 1. However, for ease of understanding, a schematic description will be made with reference to FIG.

The press brake 1 includes left and right side frames 3L and 3R. An upper table 5U is provided on the upper part of the side frames 3L and 3R. Further, below the side frames 3L and 3R, an upper table 5U and a lower table 5L facing in the vertical direction (Z-axis direction) are provided. The upper table 5U is configured as a ram mounted on the side frames 3L and 3R and moved up and down by a vertical actuating device 7L and 7R such as a fluid pressure cylinder.

The upper and lower tables 5U and 5L are provided with mold mounting portions 9U and 9L in the left-right direction (X-axis direction) for mounting the upper and lower molds P and D. The left and right guide members 11U and 11L are provided on the rear side (rear side in the Y-axis direction) of the upper and lower tables 5U and 5L. The upper and lower guide members 11U and 11L have upper and lower automatic mold changing devices (not shown) for attaching and detaching the molds P and D between the mold storage portion (not shown) and the mold mounting portions 9U and 9L. ATC) 13U and 13L are provided.

The upper and lower ATCs 13U and 13L are provided with a pair of left and right ATCs 13UL, 13UR, 13LL and 13LR so as to be movable in the left-right direction along the upper and lower guide members 11U and 11L, respectively. Each of the above ATCs 13UL, 13UR and 13LL, 13LR can be individually moved and positioned in the left-right direction by individually driving a servomotor (not shown) provided individually. The configurations of the ATC 13UL, 13UR and 13LL, 13LR are known, for example, as described in WO00 / 41824. Therefore, detailed description of the configuration of each ATC will be omitted. Each of the ATCs 13UL, 13UR, 13LL, and 13LR is provided with a mold holding member 15 that can be engaged in an engaging hole (not shown) provided in each of the molds P and D.

The mold holding member 15 is movable (advance / retreat) in the front-rear direction (Y-axis direction, the direction perpendicular to the paper surface in FIG. 1) in order to disengage from the engaging holes provided in the molds P and D. (Free) is provided. Therefore, when the mold holding member 15 is held in a state of holding the molds P and D (for example, protruding forward of the machine as shown in FIG. 2A) and moved in the left-right direction, the mold holding member 15 is moved. Reference numeral 15 denotes a contact with the molds P and D mounted on the mold mounting portions 9U and 9L from the left-right direction. That is, the mold holding member 15 also serves as an abutting member in which the ATC abuts on the reference setting members 17U and 17L, which will be described later.

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

Then, the base end portions of the reference setting members 17U and 17L are detachably attached. The reference members 17U and 17L are formed in a pin shape having a circular cross section. Therefore, it can be attached to and detached from the mounting holes 19U and 19L without worrying about the directionality of the reference members 17U and 17L.

In the above configuration, in order to set the reference for each ATC13UL (13LL) and 13UR (13LR), the molds P and D mounted on the mold mounting portions 9U and 9L of the upper and lower tables 5U and 5L are removed. .. Then, the upper and lower reference members 17U and 17L are vertically mounted and fixed in the mounting holes 19U and 19L. Then, the ATCs 13UL (13LL) and 13UR (13LR) are moved from the initial position to a position close to the reference setting members 17U and 17L. Then, as shown in FIG. 2A, the mold holding member 15 as an example of the contact member provided on the left and right ATC 13UL (13LL) and 13UR (13LR), respectively, is in a state of holding the mold. Hold the reference member 17U, 17L from the left and right at a preset low speed in consideration of the detection of torque change described later and the influence of the coasting amount of each ATC13UL (13LL), 13UR (13LR). Contact. 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 being in contact with the mold holding member 15.

At this time, in the first reference positioning method, as shown in FIGS. 2 (b) and 2 (c), the mold holding members 15 in the left and right ATC 13UL (13LL) and 13UR (13LR) with respect to the reference setting members 17U and 17L The contact is made individually at different times. Then, the detection of whether or not the ATC13UL (13LL) and 13UR (13LR) are in contact with the reference setting members 17U and 17L is a servomotor for moving the ATC13UL (13LL) and 13UR (13LR) (not shown). ) Can be detected by detecting the torque change.

It can also be detected by detecting that the output cycle of the pulse from the rotary encoder (not shown) provided in the servo motor is longer than the preset cycle. Further, it can be detected by equipping the mold holding member 15 with an acceleration sensor and detecting the impact at the time of contact. That is, various means can be adopted as means for detecting the contact of the ATC 13UL (13LL) and 13UR (13LR) with the reference setting members 17U and 17L.

By the way, since the left and right ATC13UL (13LL) and 13UR (13LR) with respect to the reference setting members 17U and 17L have different contact times, when one ATC13UL (13LL) abuts, the other ATC13UR (13LR) hits. It is not affected by contact, for example, vibration.

As described above, the position where the mold holding member 15 in each ATC13UL (13LL), 13UR (13LR) abuts on the reference setting member 17U, 17L is set as a reference in the left-right direction in each ATC13UL (13LL), 13UR (13LR). It is a position.

Next, 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) and 13UR (13LR), as shown in FIG. Move to the position from the left and right at the same time, turn off the servo, and check the position. Here, the position is confirmed by servo-off in order to avoid mutual influences such as vibration when the left and right ATC13UL (13LL) and 13UR (13LR) come into contact with the reference members 17U and 17L. After that, each mold holding member 15 is retracted, and each ATC 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 above-described embodiment, and can be implemented in other embodiments by making appropriate changes. That is, in the above description, it has been explained that the reference setting members 17U and 17L are attached and detached to and from the mounting holes 19U and 19L provided in the upper and lower tables 5U and 5L. However, it is also possible to provide the reference setting members 17U and 17L so as to be vertically rotatable or vertically movable with respect to the upper and lower tables 5U and 5L so that the reference setting members project to the reference position when the reference position is set. Is.

Further, for the contact with the reference setting members 17U and 17L, instead of the mold holding member 15 provided in each ATC, a contact member capable of contacting the reference setting members 17U and 17L from the left and right directions is provided to each ATC. It is also possible to have a separate configuration.

As can be understood from the above description, according to the present embodiment, the mold holding members provided for the ATC 13UL (13LL) and 13UR (13LR) are provided for the reference setting members 17U and 17L provided for the reference position. The reference position is set by individually contacting the 15s from the left and right directions. Therefore, accurate and reproducible reference positioning can be automatically performed 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 setting member 19U, 19L Mounting holes P, D Upper and lower molds

Claims (5)

The upper and lower tables provided with the mold mounting portions are provided so as to face each other vertically, and the upper and lower ATCs for attaching and detaching the mold to and from the mold mounting portion are provided so as to be movable in the left-right direction along the mold mounting portion. In addition, in a press brake provided with a pair of left and right ATCs on the upper and lower ATCs, the reference positioning method is used to perform reference positioning of the pair of left and right ATCs.
When the mold holding members in the pair of left and right ATCs are in contact with the reference setting members provided at the reference positions in the left and right directions on the upper and lower tables from the left and right directions, and the mold holding members are in contact with the reference setting members. A reference positioning method characterized in that the position in the left-right direction of is set as a reference position in each ATC. The reference positioning method according to claim 1, wherein the left and right mold holding members are brought into contact with the reference positioning member separately on the left and right sides. The reference positioning method according to claim 1 or 2, wherein the reference positioning in the pair of left and right ATCs on the upper and lower tables is performed at the same time. A press brake used in the reference positioning method according to claim 1, 2, or 3.
Upper and lower tables with mold mounting parts,
The upper and lower ATCs are equipped with a pair of left and right ATCs that can be moved in the left-right direction in order to attach and detach the molds to the upper and lower mold mounting parts.
A reference member for the reference position on the upper and lower tables,
A contact detecting means for detecting that the mold holding member of each ATC has come into contact with the reference setting member, and
A contact position detecting means for detecting the contact position of the mold holding member with respect to the reference setting member, and
A press brake characterized by being equipped with. The press brake according to claim 4, wherein the reference setting member is detachably provided at a reference position on an upper and lower table.

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