JP6438182B2 - Press forming equipment - Google Patents

Description

  The present invention relates to a press molding apparatus that can detect whether or not a workpiece is separated from a lower mold.

  2. Description of the Related Art In plate press forming apparatuses, a structure is known in which a plate material is lifted by lifters provided before and after a press forming step, and a material to be processed is separated from a lower mold. For example, a press molding apparatus disclosed in Patent Document 1.

JP 2009-78276 A

  In the press molding apparatus, depending on the shape to be molded, the part to be processed may not be separated from the lower mold, and there is a problem that the material cannot be fed and hits twice.

  Therefore, it is conceivable that a lowering mold is provided in the lower mold, and the processed part is pushed up to be separated from the lower mold. However, even if such a protruding mechanism is provided, the processed part is lowered. Once fixed to the mold, it cannot be separated from the lower mold.

  Therefore, in order to reliably prevent double hitting, it is required that the press molding apparatus can be stopped when the workpiece is not separated from the lower mold.

  However, since the press molding device cannot stop immediately even if the stop process is performed due to the inertial force of the movable part, it is necessary to detect that the part to be processed is not separated from the lower mold as soon as possible after press molding. There is a problem that the press molding apparatus cannot be stopped before hitting twice.

  The present invention has been made in view of such a technical problem. A press capable of detecting whether or not the workpiece has been separated from the lower die at a timing at which the press molding apparatus can be stopped before being hit twice. An object is to provide a molding apparatus.

According to an aspect of the present invention, there is provided a press forming apparatus for forming a processed part while feeding a plate material , and is provided so as to be movable up and down, and when the upper die rises, it follows the rise of the upper die. comprising a blade-out mechanism which rises to a predetermined position where Ru is separated the portion to be processed from the lower mold, and a detection means for detecting that said out splashing mechanism is raised to the upper limit Te, the out splashed mechanism Is a protruding pin, a pin holder to which the protruding pin is connected, and the pin holder is urged from below, and the pin holder is moved in the process of moving the upper die from the bottom dead center to the top dead center in a press cycle. A compression spring that pushes up , and the lower die is formed with a through-hole through which the ejection pin is inserted, and the detecting means is configured to detect the upper die from the bottom dead center in the press cycle. Separation before reaching point Detecting said pin holder at a timing within a constant range, press-forming apparatus is provided, characterized in that.

  According to the above aspect, it is possible to detect whether or not the workpiece is separated from the lower mold immediately after press molding at the bottom dead center in the press cycle. Therefore, when the part to be processed is not separated from the lower mold, the press molding apparatus can be stopped before the press cycle reaches the bottom dead center where the next press molding is performed, so that double hitting can be prevented.

It is the schematic diagram which looked at the press molding apparatus which concerns on embodiment of this invention from the front. It is the schematic diagram which looked at the press molding apparatus which concerns on embodiment of this invention from the side surface. It is a flowchart which shows the control content which a control apparatus performs. It is a figure which shows a press cycle.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1A is a schematic view of a press forming apparatus according to an embodiment of the present invention as seen from the front. Moreover, FIG. 1B is the schematic diagram which looked at the press molding apparatus which concerns on embodiment of this invention from the side surface.

  The press forming apparatus 1 includes a forming punch 2, a forming die 3, a splashing mechanism 4, a detection mechanism 5, and a control device 6. The press punching apparatus 1 moves the forming punch 2 up and down by a crank mechanism (not shown), and a plate material 7. Is a crank type press forming apparatus for press forming.

  The forming die 3 is positioned by the die plate 8 and fixed to the backing plate 9 together with the die plate 8. The backing plate 9 is a protective plate that receives a processing load during press molding.

  The backing plate 9 is fixed to the die holder 10, and the molding die 3, the die plate 8, the backing plate 9, and the die holder 10 are unitized. The die holder 10 is a unit base provided so that the position adjustment in the height direction of the molding die 3 and the mounting to the press molding apparatus 1 are facilitated.

  As described above, the die holder 10 is fixed to the bed surface 1a of the press molding apparatus 1 in a state of being unitized with the molding die 3 and the like.

  The ejecting mechanism 4 includes a plurality of ejecting pins 11, a pin holder 12, and a plurality of compression springs 13. The ejecting pins 11 are connected to the pin holder 12.

  The molding die 3 and the backing plate 9 are provided with through holes through which the ejection pin 11 is inserted in accordance with the position of the ejection pin 11 connected to the pin holder 12. The die holder 10 is slidably disposed. The compression spring 13 is disposed below the pin holder 12.

  The ejecting mechanism 4 is raised to a position where the pin holder 12 abuts against the lower surface of the backing plate 9 by the urging force of the compression spring 13.

  At this time, the length of the protruding pin 11 is set so that the position of the upper end of the protruding pin 11 and the position of the upper end of the convex portion in the unevenness of the processed surface of the molding die 3 are substantially flush. Is done. Thereby, it can prevent that the to-be-processed part 71 of the board | plate material 7 is caught in the upper end of the shaping | molding die 3 or the protrusion pin 11 at the time of material feeding.

  In the ejection mechanism 4, when the molding punch 2 descends during press molding, the ejection pin 11 is pushed down via the plate material 7 and descends. Therefore, at the time of press molding, the ejection mechanism 4 does not hinder processing.

  When the molding punch 2 is raised, the urging force of the compression spring 13 causes the ejection pin 11 to push up the workpiece 71, so that the workpiece 71 can be separated from the molding die 3.

  As described above, the ejecting mechanism 4 includes a plurality of ejecting pins 11 and a plurality of compression springs 13. The number and arrangement of these ejecting mechanisms 4 are formed by uniformly pushing up the workpiece 71. 3 is set in consideration of the shape of the workpiece 71, the thickness and width of the plate member 7, and the like.

  Thus, by providing the plurality of protruding pins 11 and the plurality of compression springs 13, it is possible to prevent the workpiece 71 from being inclined and leaving only a part from the forming die 3, and the plate material 7 can be separated. Even in the case of a thin plate or a soft material such as aluminum, the processed portion 71 can be separated without being deformed.

  As shown in FIG. 1A, the detection mechanism 5 includes two proximity sensors 51 fixed to the die plate 8 by the sensor installation block 14, and two detection pins 52 connected to both ends of the pin holder 12.

  The position of the proximity sensor 51 in the height direction is set so as to output a detection signal in response to the detection pin 52 when the ejecting mechanism 4 is raised to a position where the pin holder 12 contacts the backing plate 9. .

  When the workpiece 71 is not separated from the molding die 3, the protrusion mechanism 4 does not rise, so the proximity sensor 51 does not output a detection signal.

  The distance at which the proximity sensor 51 reacts to the detection pin 52 is set to, for example, 0.05 mm so that it can be detected with high accuracy that the workpiece 71 is separated from the molding die 3.

  Therefore, since it may be erroneously detected that the press molding apparatus 1 is affected by the vibration, the proximity sensor 51 is fixed to the die plate 8 or the die holder 10 that is fixed to the bed surface 1a that is not easily affected by the vibration. Is preferred.

  Next, operation | movement of the press molding apparatus 1 is demonstrated according to the content of the control which the control apparatus 6 performs.

  FIG. 2 is a flowchart showing the contents of control performed by the control device. FIG. 3 is a diagram showing a press cycle.

  First, the control device 6 feeds the material and advances the portion of the plate material 7 to be press-formed to between the forming punch 2 and the forming die 3 (S1).

  Material feed is performed around top dead center (0 degree) in a 360 degree press cycle. For example, the press cycle is between 330 degrees and 30 degrees.

  When the material feeding is completed, the control device 6 lowers the molding punch 2 and performs press molding (S2).

  Press molding is performed around the bottom dead center (180 degrees) of the press cycle. For example, the press cycle is between 150 degrees and 210 degrees.

  When press molding is completed and the molding punch 2 is raised, the ejection mechanism 4 pushes up the workpiece 71 and moves away from the molding die 3 in conjunction with the elevation of the molding punch 2.

  At this time, the splashing mechanism 4 moves up to a position where the pin holder 12 comes into contact with the backing plate 9 while separating the workpiece 71 from the molding die 3. In this state, the proximity sensor 51 responds to the detection pin 52 and outputs a detection signal.

  When the detection signal is output from both of the two proximity sensors 51 while the press cycle is within the separation determination range, the control device 6 determines that the workpiece 71 is separated from the forming die 3 (S3: YES), the process proceeds to S1.

  If no detection signal is output from the two proximity sensors 51 while the press cycle is within the separation determination range, it is determined that the workpiece 71 is not separated from the forming die 3 (S3: NO), and the process proceeds to S4. To do.

  Further, when the detection signal of the proximity sensor 51 is output only from one of the two proximity sensors 51, the processed part 71 is not completely separated from the molding die 3 and is in a state where it is lifted at an angle. Since it is considered, it determines with the to-be-processed part 71 not separating from the shaping | molding die 3 (S3: NO), and transfers to S4.

  The separation determination range is, for example, a timing at which the press molding apparatus 1 can be stopped before hitting twice when the press cycle is between 210 degrees and 270 degrees and the workpiece 71 is not separated from the molding die 3. Is set to be

  In S4, the control device 6 stops the press molding device 1.

  As described above, immediately after the press molding in the press cycle, it can be detected that the processed portion 71 is not separated from the molding die 3, so that the press molding apparatus 1 is operated by the next press molding timing in the press cycle. Can be stopped.

  According to this embodiment, it is possible to detect whether or not the workpiece 71 is separated from the forming die 3 immediately after press forming at the bottom dead center in the press cycle. Therefore, when the work part 71 is not separated from the forming die 3, the press molding apparatus 1 can be stopped before the press cycle reaches the bottom dead center where the next press molding is performed.

  Moreover, since the proximity sensor 51 is fixed to the die plate 8, it is difficult to be affected by the vibration of the press molding apparatus 1, and erroneous detection can be prevented.

  As mentioned above, although embodiment of this invention was described, the said embodiment showed only a part of application example of this invention, and is not the meaning which limits the technical scope of this invention to the specific example of said embodiment. .

  In the above embodiment, the present invention is applied to a crank press molding apparatus, but may be applied to, for example, a hydraulic press molding apparatus.

  Moreover, although the compression spring 13 is used for the ejection mechanism 4, it is good also as a structure which raises the ejection mechanism 4 using a tension spring, for example, and it splashes by elastic bodies other than a spring, or air pressure. It is good also as a structure which raises the taking-out mechanism 4. FIG.

  Moreover, although the proximity sensor 51 is used for the detection mechanism 5, it is good also as a mechanism which detects the position of the detection pin 52 using a Hall sensor or a laser displacement meter, for example.

1 Press forming device 2 Forming punch (upper die)
3 Molding die (lower mold)
4 splash mechanism 5 detection mechanism (detection means)
51 Proximity sensor (sensor)
71 Processed part 8 Die plate (base member)
9 Backing plate (base member)
10 Die holder (base member)

Claims (2)

A press molding apparatus for molding a workpiece while feeding a plate material ,
Vertically movably provided, the upper die is raised, and the blade out mechanism for increasing the portion to be processed so as to follow the rise of the upper mold to a predetermined position where Ru is separated from the lower mold,
Detecting means for detecting that the splashing mechanism has risen to an upper limit;
With
The splash mechanism is
With a splash pin,
A pin holder to which the protruding pin is connected;
A compression spring that urges the pin holder from below and pushes up the pin holder in a process in which the upper mold moves from a bottom dead center to a top dead center in a press cycle ;
Have
The lower mold is formed with a through hole through which the protruding pin is inserted,
The detection means detects the pin holder at a timing within a separation determination range before the upper die reaches the top dead center from the bottom dead center in the press cycle .
A press molding apparatus characterized by that. The press molding apparatus according to claim 1,
The detection means includes a sensor for detecting that the ejecting mechanism is raised,
The sensor is fixed to a base member to which the lower mold is fixed,
The ejecting mechanism has a plurality of the ejecting pins and the compression springs , respectively.
A press molding apparatus characterized by that.

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