JP2006281288A - Pressing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing device capable of performing pressing with high accuracy without influencing the feeding of a plate to be worked by specific forming. <P>SOLUTION: The pressing device includes a lower die set 3 which is disposed movably on a die installation table 5, an upper die set 2 which is disposed movably on an upper installation table 4, a position fixing and locking means 9 which is disposed freely liftably on the die installation table 5, and fixes the lower die set 3 by engaging therewith, a fixation releasing means 10 which is disposed on the upper die set 2 to face the position fixing and locking means 9 and releases the fixation of the lower die set 3 by the position fixing and locking means 9 by abutting on the position fixing and locking means 9 when the upper die set 2 progresses to the lower die set 3, positions the plate (t) to be worked by means of an in-die pilot pin 2p disposed in the upper die set 2, pinches the plate by pressure with a stripper 6 and starts working by the punch (p) and the die (d), and pilot pins 16p, 17p which are inserted into pilot holes t1 and move and position the plate (t) to be worked together with the lower die set 3 and the upper die set 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

    The present invention relates to a press device that punches a processed plate material such as a metal plate into a predetermined shape, and more particularly to a press device that can position the processed plate material with high accuracy.

    The press device is generally a press drive transmission device, for example, a press load transmitted from a press ram is received by a punch holder of an upper die installation plate, and an upper die set provided with a punch is attached to the upper die installation plate. By moving forward and backward with respect to the die hole of the die installed on the die, a desired plate is punched, cut or bent by a punch to perform a desired press work.

  For example, laminated cores for motor cores, lead frames for semiconductor devices, etc., are stamped and formed from a work plate such as a steel plate or copper plate into a desired shape by a press device, but the press device usually consists of one unit. Rather than divide the contents of formation into a plurality of press mold devices, each press device performs various forming processes, such as various desired shapes such as round, rectangular, oval, etc., cutting, bending, bending, etc. In this process, each forming process is performed by passing a plate to be processed through these press mold apparatuses.

In the mold apparatus as described above, a lower die set having a die and an upper die set having a punch are connected and positioned by a guide post, for example, a punch provided in an upper die. However, the clearance between the punch and the die is set very narrow in a high-precision press mold apparatus.
JP-A-10-243614 JP 05-38531 A

    By the way, in a press apparatus composed of a plurality of press mold apparatuses, when a plate to be processed is intermittently passed and formed into a desired product by each, a press mold apparatus in a certain process has higher accuracy than the others. Forming may be required.

  In such a press die apparatus, the clearance between the punch and the die is extremely narrow.

  On the other hand, a pilot hole for positioning is formed in the plate to be processed, and a pilot pin provided in the press mold apparatus is inserted into the pilot hole for positioning, and the forming process in the press mold apparatus is performed. However, there may be a misalignment between the pilot hole of the plate to be processed and the pilot pin of the press die apparatus.

  When forming processing is performed in a state in which such misalignment occurs, for example, when forming a protrusion for caulking a workpiece plate of a punched piece, the processed portion becomes defective in shape. Problems such as shape defects such as tilting of a laminated product obtained by laminating iron core pieces on which distortion and caulking protrusions are formed occur.

  As a conventional technique for solving the above problem, a progressive die apparatus 100 of Patent Document 1 is a front view of a main part thereof, as shown in FIG. 6, a press load transmission connecting portion for transmitting a press load from a press ram 101 to a punch holder 102. 103a and 103b are spheroidally slid to prevent the punch holder 102 from tilting when the press load from the press ram 101 is transmitted in a tilted direction.

  According to this configuration, even when the press load from the press ram 101 is inclined, the press load transmission connection portions 103a and 103b slide with a spherical surface, so that the inclination of the press ram 101 is set between the press load transmission connection portions 103a and 103b. Can be released by sliding, and only the force component in the vertical direction of the press load can be taken out and transmitted as the actual press load.

  Therefore, since the positional deviation between the punch 104 and the die 105 is reduced, the caulking protrusion formed on the iron core piece can be formed with good shape accuracy, and the shape of the laminated product in which the iron core pieces on which the caulking protrusion is formed is laminated is excellent. effective.

  However, in order for the punch holder 102 to return to the top dead center after the press ram 101 returns to the top dead center, the punch holder 102 is supported by the spring 106 with respect to the press ram 101. It takes time to restore to a predetermined position of the top dead center by receiving resistance due to the elastic force of 106. For this reason, there is a possibility that the punch 104 and the die 105 are misaligned when performing press working at a high speed.

  On the other hand, the press die 200 of Patent Document 2 has a thrust holder block 203 for holding the punch 201 and a die holder block 204 for holding the burring button die 202 as shown in FIG. The punch 201 is supported by bearings 205 and 206 so as to be movable relative to the punch holder plate 207, and the die 202 is configured to be movable relative to the die holder block 208.

  In this configuration, when the punch 201 is penetrated into the hole t1 punched and formed in the previous process on the work plate t and burring is performed, the conical surface 201m formed at the tip of the punch 201 is formed from the hole t1 of the work plate t. Upon receiving the horizontal reaction force, the punch 201 moves horizontally until the center of the punch 201 matches the center of the hole t1, and burring is performed.

  Similarly, with respect to the die 202, when the punch 201 is inserted into the hole t1 of the work plate t and burring is performed, the die 202 receives a horizontal force from the conical surface 201m at the tip of the punch 201, and Burring is performed by moving the die 202 in the horizontal direction to a position where the center coincides with the center of the hole t1 of the work plate t.

  In this configuration, when the punch 201 is inserted into the formed hole t1 and burring is performed with the die 202, the punch 201 and the die 202 move so as to coincide with the center of the hole t1.

  In other words, during the burring process, the clearance between the punch 201 and the punch holder plate 207 and the clearance between the die 202 and the die holder block 208 are changed.

  The press die 200 of Patent Document 2 is effective in burring, but has a problem that it is difficult to apply to a punch tip having an eccentric shape, such as a caulking projection. ing. Therefore, the configuration of Patent Document 2 has a disadvantage that the application range is limited.

  As described above, in the past, there is no structure suitable for correcting the conveyance deviation of the workpiece.

  In view of the above-mentioned actual situation, the present invention provides a press apparatus provided with a plurality of press mold apparatuses. When forming a product having a desired shape by passing a work plate such as a steel plate and performing press processing, a certain press mold apparatus is provided. When carrying out forming processing with higher accuracy than other press mold apparatuses, or when forming and processing by pressing the work plate stronger than other press mold apparatuses, or deeper than other press mold apparatuses. In the case of a specific forming process such as a case of performing a specific forming process such as a caulking connecting process in which a plurality of processed plates are integrated into a single plate, the influence of the feed of the processed plate on other press devices It is an object of the present invention to provide a press apparatus that can be performed with high accuracy without giving a squeeze.

    In order to achieve the above object, a press apparatus according to claim 1 of the present invention includes a lower die set having a die and a punch that is movable forward and backward to the lower die set side through a guide post. An upper die set, and a workpiece plate conveyed by moving the upper die set back and forth with respect to the lower die set is positioned by an in-die pilot pin provided in the upper die set. A press device for processing with a punch and a die, a lower die set provided movably on a lower die setting table, an upper die set provided movably on an upper die upper plate, Position fixing locking means that can be moved up and down on the die mounting base, and engages and fixes the lower die set, and is provided in the upper die set facing the position fixing locking means, Upper die set is lower When proceeding to the die set, the workpiece plate is positioned by the in-mold pilot pin, clamped by the stripper, and when the machining is started by the punch and the die, the lower die set is fixed by contacting the position fixing locking means. The lower die set and the upper die set that are provided on at least one of the entry side and the exit side of the press device and that start processing by pressing the workpiece plate by the fixation release unit can be moved. And a pilot pin that is inserted into a pilot hole of the workpiece plate and moved and positioned together with the lower die set and the upper die set.

    As described above in detail, according to the press device according to the present invention, the pilot plate provided on at least one of the entrance side and the exit side of the press device is inserted into the pilot hole of the work plate to position the work plate. At this time, the lower die set and the upper die set, which have already been clamped and started to be processed, move together with the work plate so that the pilot pins are aligned with the pilot holes. Positioning is performed in a state in which the position is aligned with a predetermined position. The movable press device continues to process, and the other plate presses the workpiece plate without being displaced.

  Therefore, in the press apparatus, when the forming process is performed with higher accuracy, or when the forming process is performed by pressing the processed plate more strongly, or when the forming process is performed deeper, or when the processed plates are stacked in multiple layers It is possible to perform a specific forming process such as a caulking connecting process for integrating a single plate with high accuracy.

  Therefore, a high-quality press product can be manufactured even when performing a specific forming process.

  In other press apparatuses, the plate to be processed can be positioned without being displaced even when the movable press apparatus performs a specific forming process.

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

  FIG. 1 is a conceptual top view showing an arrangement in a press line pl of a press apparatus 1 to which the present invention is applied, and FIG. 2 is a cross-sectional view taken along line AA of the press apparatus 1 shown in FIG.

  3 to 5 are cross-sectional views taken along the line AA of FIG. 1 showing the transition of the pressing process.

  In FIG. 1, t is a workpiece plate such as a steel plate that is conveyed as indicated by an arrow on the press line pl and is pressed in the press line pl, and 15 is a position for positioning the workpiece plate t when it is pressed. A pilot hole punching machine 16 for drilling the pilot holes t 1 and t 1 in the work plate t is a work plate positioning device for positioning the work plate t when the press device 1 performs press working.

  The press device 1 is a press machine for forming a caulking projection on a work plate t by pressing. As shown in FIG. 2, an upper die set 2 provided movably on an upper die setting plate 4, and a die A lower die set 3 is provided on the installation table 5 so as to be movable on the surface of the die installation table. When positioning the workpiece plate t, the upper die set 2 and the lower die are set together with the workpiece plate t. The set 3 is configured to move and be positioned.

  Reference numeral 17 denotes another press device of the press line pl which is a press device array including the press device 1.

  As shown in FIG. 2, the workpiece plate positioning device 16 includes pilot pins 16p and 16p corresponding to a pair of pilot holes t1 and t1 (see FIG. 1) of the workpiece plate t. 16p is a pilot drilled in the work plate t as shown in FIG. 4 of the cross-sectional view taken along the line AA of FIG. The workpiece is inserted into the holes t1a and t1a, and the workpiece plate t is moved as indicated by the arrow to be positioned with respect to the press device 1.

  Similarly, as shown in FIG. 2, the other pressing device 17 is also provided with pilot pins 17p and 17p. When the pilot pins 17p and 17p are pressed by the pressing device 1, they are shown in FIG. Next, the workpiece plate t is inserted into a pair of pilot holes t1b and t1b drilled in the workpiece plate t, and the workpiece plate t is moved as indicated by an arrow to be positioned with respect to the press device 17 of its own.

  As shown in FIG. 2, the press device 1 includes an upper die set 2 to which a punch p for punching and forming a caulking protrusion on a work plate t is fixed, and a die for forming a caulking protrusion together with the punch p. a lower die set 3 to which d is fixed, and the upper die set 2 is horizontal to the upper die installation plate 4 via a plurality of balls b1 (in a direction parallel to the conveying surface of the work plate t). Similarly, the lower die set 3 is horizontally disposed on the die mounting table 5 via a plurality of balls b2 (in a direction parallel to the conveying surface of the work plate t). Thrust freely supported.

  Further, the upper die set 2 is provided with an in-mold pilot pin 2p, and is configured to enter the pilot hole t1c of the work plate t conveyed during processing in the press apparatus 1 and position the work plate t. ing.

  The upper die installation plate 4 is fixed to a press ram 7 to which a press load is applied, and the upper die U is constituted by the press ram 7, the upper die installation plate 4, the upper die set 2, and the like. On the other hand, the lower die S is constituted by the lower die set 3 having the die d, the die mounting base 5 and the like.

  When the work plate t is pressed, a press load is applied to the press ram 7 so that the upper die U moves forward and backward with respect to the lower die S including the die d so that the in-mold pilot pin 2p is covered. The processing plate t enters the pilot hole t1c and is positioned, and a predetermined pressing is performed on the processing plate t on the die d of the lower mold S by the punch p.

  Further, as shown in FIG. 2, guide posts 8 are fixed to the upper die set 2 so as to face downward. A plurality of the guide posts 8 are arranged at positions (see FIG. 1) that do not overlap with the work plate t to be conveyed, and slide through the holes formed in the lower die set 3 and the die setting table 5. Then, the punch p of the upper die U is guided with respect to the die hole d1 of the die d of the lower die S (see FIG. 5 of the sectional view taken along the line AA in FIG. 1 representing the punching process of the work plate t).

  Further, a stripper 6 is movably supported on the upper die set 2 of the upper die U via an elastic material (not shown) such as a spring, and is shown in FIG. 3 of the sectional view taken along the line AA in FIG. As described above, the stripper 6 presses the work plate t against the die d of the lower die set 3 by the elastic force of the elastic material when pressing, and fixes the work plate t positioned by the in-mold pilot pin 2p. To do. Under this situation, press working of the work plate t is started.

  Further, as shown in FIG. 2, a plurality of position fixing locking pins (position fixing locking means) 9 are provided in the lower mold S, and a hole 5 h drilled in the die mounting base 5 and a lower die set 3 are drilled. The holes 3h and dh are provided to be provided, and a compression spring 9b is provided below the holes 3h and dh so as to be movable up and down.

  The clearance between the position fixing latch pin 9 and the hole 5h of the die mounting base 5 is set to be narrow, and the clearance between the position fixing latch pin 9 and the hole dh of the lower die set 3 is set to be narrow. Has been.

  Therefore, the position fixing latch pin 9 is inserted through the hole 5h of the die mounting base 5 and the hole dh of the lower die set 3 so that it can be thrust horizontally with respect to the die mounting base 5 via the balls 2. The provided lower die set 3 can be restrained in the horizontal direction with respect to the die mounting base 5 and fixed in position.

  As described above, the position fixing locking pin 9 is a member for fixing the lower die set 3 so as not to move in the horizontal direction (parallel to the conveying surface of the processed plate t) with respect to the die mounting base 5. As shown in FIG. 1, a plurality are provided at positions that do not overlap with the processed plate t to be conveyed.

  As a member for releasing the fixing of the lower die set 3 to the die mounting base 5 by the position fixing locking pin 9, as shown in FIGS. 1 and 2, a fixing releasing pin (fixing releasing means) 10 is a position fixing member. Opposite to the stop pin 9, the upper die set 2 is erected downward.

  Here, since the fixing release pin 10 is erected so as to face the position fixing locking pin 9, as shown in FIG. 1, the position fixing locking pin 9 is located at a position that does not overlap with the workpiece t to be conveyed. Are arranged on the same axis.

  When the press working is not performed, as shown in FIG. 2, the fixing release pin 10 does not come into contact with the position fixing locking pin 9 because the upper mold U is raised, and the position fixing locking 10 The lower die set 3 is fixed to the die mounting base 5 by pins 9.

  On the other hand, at the time of pressing, the upper mold U descends toward the lower mold S as shown in FIG. The position fixing locking pin 9 is pushed downward from the hole dh of the lower die set 3 by contacting and pressing downward.

  Then, the fixing of the lower die set 3 to the die mounting base 5 by the position fixing locking pin 9 is released, and the lower die set 3 is parallel to the die mounting base 5 (parallel to the conveyance surface of the work plate t). ) And can move freely. At this time, the upper die set 2 is also freely movable and movable in the horizontal direction (parallel to the conveyance surface of the workpiece plate t) with respect to the upper die installation plate 4 via the balls 2.

  At this time, as described above, the in-mold pilot pin 2p positions the work plate t and starts press working with the punch p.

  Accordingly, as shown in FIG. 4 of the AA line sectional view of FIG. 1 showing the positioning process of the work plate t with respect to the other press device 17, the press device 1 further performs press work, and the other press device 17 However, when performing the press working, in order to position the work plate t, the pilot pins 16p, 16p of the work plate positioning device are inserted into the pilot holes t1a, t1a of the work plate t, and the pilot holes t1b, When the pilot pins 17p and 17p of the other press device 17 are inserted into t1b, the work plate t is pressed against the lower die set 3 by the stripper 6, and is sandwiched between the upper die set 2 and the lower die set 3. The pressed work plate t can be moved in the horizontal direction (parallel to the conveyance surface of the work plate t) together with the lower die set 3 and the upper die set 2 as indicated by arrows in FIG.

  Therefore, if the positions of the pilot holes t1a, t1a, t1b, t1b of the work plate t do not coincide with the positions of the pilot pins 16p, 16p, 17p, 17p, the work plate t is moved to the lower die set 3, By moving together with the mold die set 2, the positions of the pilot holes t1a, t1a, t1b, t1b can be matched, and the position of the work plate t with respect to the other press device 17 can be aligned. At the same time, the press apparatus 1 performs press processing, and deep cut-down processing is performed in this embodiment with a good shape.

  The movable length of the upper die set 2 with respect to the upper die setting plate 4 and the movable length of the lower die set 3 with respect to the die setting table 5 are determined by the press feed accuracy (per unit length). ) To obtain a press feed error length, which is determined according to the press feed error length.

  Next, a process of pressing the workpiece plate t by the press device 1 having the above-described configuration will be described.

  As shown in FIG. 2, in the press apparatus 1, the upper die set 2 of the upper die U is raised and separated from the lower die set 3 of the lower die S during non-pressing. Therefore, the position fixing locking pin 9 is pressed upward by the compression spring 9 b and is inserted into the hole dh of the lower die set 3, so that the lower die set 3 is positioned on the die mounting base 5 by the position fixing locking pin 9. It is fixed.

  First, the plate to be processed t is conveyed to a predetermined position to be pressed in the press device 1.

  Here, when the work plate t is conveyed without misalignment, the pilot holes t1a and t1a of the work plate t are connected to the pilot pins 16p and 16p of the work plate positioning device 16 as shown in FIG. The pilot holes t1b and t1b of the plate to be processed t are positioned below the same axis as the pilot pins 17p and 17p of the other press devices.

  However, in reality, a feed length error due to the conveyance of the work plate t occurs, so that the center of the pilot hole t1 (t1a, t1b) of the work plate t is precisely below the coaxial axis of the pilot pins 16p, 17p. There is a case where a shift occurs without being positioned and the processed plate t is conveyed to the shifted position.

  Subsequently, as shown in FIG. 3, the upper die U is lowered, and the position fixing locking pin 9 is pushed downward by the fixing release pin 10, and the position fixing locking pin 9 is moved from the hole dh of the lower die set 3. The lower die set 3 is placed on the lower side of the die mounting table 5 so that the lower die set 3 is movable. At this time, the upper die set 2 is also movable under the upper die installation plate 4.

  Further, when the upper die U is lowered, the in-die pilot pin 2p enters the pilot hole t1c of the workpiece plate t, and press working is started by the punch p and the die d. At this time, the work plate t is pressed and fixed onto the die d of the lower die set 3 by the stripper 6.

  Subsequently, as shown in FIG. 4, the work plate positioning device 16 is lowered, and the pilot pins 16p, 16p are inserted into the pilot holes t1a, t1a of the work plate t. 17, the pilot pins 17p and 17p are inserted into the pilot holes t1b and t1b of the work plate t.

  At this time, as described above, there is an error in the feed length of the work plate t, and the centers of the pilot holes t1a and t1a of the work plate t are the centers of the pilot pins 16p and 16p of the work plate positioning device 16. In some cases, the centers of the pilot holes t1b and t1b of the work plate t are deviated from the central axes of the pilot pins 17p and 17p of the other press devices 17.

  However, the lower die set 3 and the upper die set 2 in a state where the work plate t is sandwiched are horizontally directed to the die setting table 5 and the upper die setting plate 4, that is, transport the work plate t. Since the thrust can be made parallel to the surface, the pilot pins 16p and 16p are inserted into the pilot holes t1a and t1a of the processed plate t, and the pilot pins 17p and 17p of the other press device 17 are processed. By being inserted into the pilot holes t1b and t1b of the plate t, the pilot pins 16p and 16p are parallel to the pilot holes t1a and t1a of the processed plate t in the horizontal direction (parallel to the conveying surface of the processed plate t). Further, a correcting force in the horizontal direction (parallel to the conveying surface of the processed plate t) is applied from the pilot pins 17p and 17p to the pilot holes t1b and t1b of the processed plate t.

  Due to this correction force, the lower die set 3 and the upper die set 2 in a movable state sandwiching the workpiece plate t move together with the workpiece plate t in the horizontal direction as shown by the arrows in FIG. The center of the pilot holes t1a and t1a of the work plate t coincides with the center axis of the pilot pins 16p and 16p, and the center of the pilot holes t1b and t1b of the work plate t matches the center axis of the pilot pins 17p and 17p. To be consistent.

  In this way, the feeding error of the conveyance of the work plate t is corrected, and the work plate t is positioned at the optimum predetermined position to be pressed with respect to the other press devices 17 while being pressed in the press device 1. be able to.

  Subsequently, as shown by the arrow in FIG. 5, the upper die U continues and descends, and the punch p further cuts down the work plate t on the die d, punches out a predetermined portion of the work plate t, and sets the caulking projection. Form.

  According to the above configuration, the pilot pins 16p and 17p are aligned with the pilot hole t1 of the work plate t while the movable press device 1 performs the press work even when a conveyance error of the work plate t occurs. The lower die set 3 and the upper die set 2 that sandwich the work plate t together with the work plate t move so as to perform press work, and the other press device 17 is positioned. A desired press work can be performed on the work plate t under the condition where the alignment is achieved.

  Therefore, the movable press device 1 performs forming processing with higher accuracy than other press devices, or presses the workpiece plate t more strongly than other press devices, or performs other forming processing. When performing a forming process deeper than the press device, or when performing a specific forming process such as a caulking connecting process for integrating a plurality of stacked processing plates t into a single plate. Even in this case, it is possible to perform the forming process on the work plate t with high accuracy.

  In this embodiment, the pilot pins 16p and 16p are provided on the entrance side of the press device 1 and the pilot pins 17p and 17p are provided on the exit side of the press device 1. If it is provided on at least one of the entry side and the exit side, the above-described effects can be obtained.

The conceptual top view which shows arrangement | positioning in the press line of the press apparatus which is the Example in connection with this invention. The AA sectional view taken on the line of the press apparatus shown in FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1 showing a process of releasing the fixing of the lower die set and the upper die set in the processing step of the press device of the embodiment. 1. The sectional view on the AA line of FIG. 1 which shows the positioning process of the to-be-processed board in the manufacturing process of the press apparatus of an Example. 1. The sectional view on the AA line of FIG. 1 which shows the punching process of the to-be-processed board in the manufacturing process of the press apparatus of an Example. The principal part front view which shows the conventional progressive metal mold | die apparatus. Sectional drawing which shows the principal part which shows the conventional press die.

Explanation of symbols

1 ... Press machine,
2… Upper die set,
2p ... In-mold pilot pin,
3 ... Lower die set,
4 ... Upper mold installation plate,
5 ... Die installation table,
6 ... stripper,
8 ... Guide post,
9: Position fixing locking pin (position fixing locking means),
10: Fixing release pin (fixing release means),
16p, 16p, 17p, 17p ... pilot pins,
d ... Die,
p ... punch,
S ... Lower mold,
t ... Work plate,
t1, t1a, t1b ... pilot holes,
U ... Upper mold.

Claims (1)

A lower die set having a die, and an upper die set having a punch that can be moved forward and backward to a side of the lower die set through a guide post. A press apparatus for positioning a work plate conveyed by moving back and forth in a die set with a pilot pin provided in the upper die set and processing with the punch and die,
A lower die set movably provided on the lower die mounting base;
An upper die set movably provided on the upper die upper plate,
Position fixing locking means provided on the die mounting table so as to be movable up and down, and engaged with and fixed to the lower die set;
The upper die set is provided facing the position fixing and locking means, and the upper die set advances to the lower die set to position the work plate with the pilot pin within the die and clamp with the stripper. When starting the processing with the punch and the die, a fixing release means for releasing the fixation of the lower die set by contacting the position fixing locking means,
The lower die set that is provided on at least one of the entry side and the exit side of the press device and that starts processing by clamping the workpiece plate by the fixing release means, in a state where the upper die set is released to be movable, A press device comprising: a pilot pin that is inserted into a pilot hole of a workpiece plate and moves and positions the workpiece plate together with the lower die set and the upper die set.

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