JP2007326135A - Press die apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical press die apparatus capable of preventing degradation of precision of a material as a product when pressing and working the material by upper and lower dies. <P>SOLUTION: The press die apparatus 1 comprises a vertically movable slide 2 having an upper die 3 and a bolster 5 having a lower die 6, and presses and works a material 20 by the upper die 3 and the lower die 6. A projecting member 12 projecting downward from the bottom face of the lower die 6 is arranged in a recessed part 6A formed in the bottom face of the lower die 6 via a shim 11, and a projecting member 16 projecting upward from the upper face of the upper die 3 is arranged in a recessed part 3A formed in the upper face of the upper die 3 via a shim 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention comprises a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and pressurizes a work material with the upper mold and the lower mold to perform processing. The present invention relates to a press mold apparatus to be applied.

  In general, when pressurizing the work material with the upper mold and the lower mold, both molds, slide and bolster are deformed, that is, the upper mold and the slide are warped upward. The lower mold and the bolster are deformed to be warped downward as they are deformed, and there is a problem that the accuracy of the material to be processed is reduced.

For this reason, in order to correct the influence on the product, the actual situation is that the work of adjusting the surfaces of both molds is manually performed a plurality of times. Further, Patent Document 1 discloses a technique related to a die mounting position correction device for a press machine that moves a plurality of die holder blocks by a driving unit in a direction protruding / embedded with respect to a die mounting surface of a die support. Proposed.
JP-A-2005-118854

  However, the technique proposed in Patent Document 1 has a complicated structure, is expensive, and is not practical.

  Therefore, the present invention provides a practical press mold apparatus that prevents the accuracy of the processed material from being lowered when the processed material is pressed by the upper mold and the lower mold. The purpose is to do.

  For this purpose, the first invention comprises a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and a workpiece material is provided between the upper mold and the lower mold. In a press mold apparatus that performs processing by applying pressure, a lower projecting member that projects downward from the bottom surface of the lower mold is disposed in a recess formed on the bottom surface of the lower mold, and / or An upper projecting member that projects upward from the upper surface of the upper mold via a shim is disposed in a recess formed on the upper surface of the upper mold.

  A second invention includes a slide capable of moving up and down provided with an upper die and a bolster provided with a lower die, and pressurizes a work material with the upper die and the lower die. In a press mold apparatus for performing processing, a portion having the largest deformation amount in the processing of the bottom surface of the lower mold through a shim in a recess formed in the bottom surface of the lower mold is a degree of protrusion downward A lower projecting member is disposed so that the projecting degree gradually decreases toward the outer end of the bottom surface, and / or the upper mold is interposed through a shim in a recess formed on the upper surface of the upper mold. The upper projecting member is disposed such that the portion of the upper surface where the amount of deformation at the time of machining is the highest has a high degree of projecting upward and gradually decreases toward the outer end of the upper surface. And

  A third invention includes a slide capable of moving up and down provided with an upper die and a bolster provided with a lower die, and pressurizes a work material with the upper die and the lower die. In a press mold apparatus that performs processing, a lower adjustment member is disposed between the lower mold and the bolster, in which a lower projecting member that projects downward through a shim is disposed in a recess formed on the lower surface. And / or an upper adjustment member in which an upper protruding member protruding upward through a shim is disposed in a recess formed on the upper surface, and is disposed between the upper mold and the slide. .

  A fourth invention includes a slide capable of moving up and down provided with an upper die and a bolster provided with a lower die, and pressurizes a work material with the upper die and the lower die. In a press mold apparatus that performs processing, a portion having the largest amount of deformation during the processing through a shim in a recess formed on the lower surface has a high degree of protrusion downward and gradually toward the outer end. A lower adjustment member provided with a lower protrusion member that lowers the protrusion degree is provided between the lower mold and the bolster, and / or the processing is performed through a shim in a recess formed on the upper surface. An upper adjustment member provided with an upper projecting member such that the portion with the largest amount of deformation at the time has a high degree of projecting upward and gradually lowers toward the outer end portion is referred to as the upper mold. It is arranged between the slides.

  According to the present invention as described above, when pressing the workpiece material with the upper die and the lower die, the practical press that prevents the accuracy of the workpiece material as a product is not lowered. A mold apparatus can be provided.

  Hereinafter, a first embodiment of a drawing die apparatus for drawing according to the present invention will be described with reference to the drawings. FIG. 1 is a front view of a press mold apparatus 1. This press mold apparatus 1 includes a slide 2 that can move up and down, an upper mold 3 that is fixed to the lower surface of the slide 2, a bed 4, and the bed 4. A bolster 5 fixed on the top, a lower mold 6 fixed on the upper surface of the bolster 5, and a lower mold 6 that is arranged to be movable up and down around the lower mold 6, so that the upper mold 3 is arranged at an initial position. A blank holder 7, a column 8, a crown 9, and the like pressed by the elastic device 10 are provided.

  Then, as shown in FIG. 2, the portion having the largest deformation amount when pressing the bottom surface of the lower mold 6 is directed downward through the shim 11 in the recess 6 </ b> A formed on the bottom surface of the lower mold 6. The projecting member 12 is arranged such that the projecting degree is high and the projecting degree gradually decreases toward the outer end of the bottom surface, and the shim 11 and the projecting member 12 are fixed to the lower mold 6 with a plurality of bolts 13. .

  Further, the portion having the largest amount of deformation when the upper surface of the upper mold 3 is pressed through the shim 15 in the recess 3A formed on the upper surface of the upper mold 3 has a high degree of protrusion upward and the upper surface. A projecting member 16 whose projecting degree gradually decreases toward the outer end portion is disposed, and the shim 15 and the projecting member 16 are fixed to the upper mold 3 with a plurality of bolts 17.

  A guide member made of a low friction material is formed on the inner peripheral surface of the blank holder 7 and the outer peripheral surface of the lower mold 6 with a predetermined distance between them, and the blank holder 7 is formed along the outer periphery of the lower mold 6. Is guided so that it can move up and down smoothly. The elastic device 10 includes an air cylinder (not shown) of an elastic power source built in the bed 4, a cushion plate (not shown) to which an upper portion of the rod of the air cylinder is fixed, a cushion pin 18, Consists of The cushion pin 18 is detachably provided between the cushion plate and the blank holder 7, and penetrates the flange 6 </ b> B and the bolster 5 that extend outward to the lower part of the lower mold 6, and the blank holder 7. Is pushed up.

  When the upper mold 3 is positioned above the lower mold 6, the blank holder 7 is supported by the elastic device 10 and positioned above. In this state, the substantially flat work material 20 is placed and set on the lower mold 6 attached to the upper surface of the bolster 5, and the slide 2 and the upper mold 3 are lowered by a drive source (not shown). When the upper holder 3 is lowered, the blank holder 7 also moves along the guide member of the lower mold 6 while the guide member of the blank holder 7 is guided along the guide member of the lower mold 6. It begins to descend against the elastic force.

  Further, the upper mold 3 is lowered to apply pressure to the blank holder 7 so that the upper surface of the lower mold 6 protrudes from the upper surface of the blank holder 7, and the lower surface of the upper mold 3 and the upper surface of the lower mold 6 are sufficiently provided. When approaching, a product having a predetermined shape following the upper surface of the lower mold 6 and the lower surface of the upper mold 3 (product shape surfaces of both molds) is pressed.

  After the lowering, the upper mold 3 is raised, and the upper mold 3 and the blank holder 7 are reversely moved to their initial positions, and the processed material (product) 20 thus processed is The material 20 to be processed is taken out manually or automatically, placed on the lower mold 6 and set, and the above-described operation is repeated.

  As shown in FIG. 3, in order to allow attachment of various lower dies 6 of different sizes or the like on the upper surface of the bolster 5, a plurality of parallel inverted T-shaped attachment grooves are provided at predetermined intervals. 21 has been established. Further, as shown in FIG. 4, for example, two mounting pieces 23 each having a U-shaped mounting groove 22 in a plan view are provided on the front part and the rear part of the lower mold 6 so as to protrude outward. . Then, the head 24 (having a diameter larger than the length of the narrow portion 21B) is inserted into the wide portion 21A of the mounting groove 21, and the bolt 24 whose shaft portion protrudes upward from the narrow portion 21B is attached. The lower die 6 can be attached to the bolster 5 by tightening the nut 26 from above through the washer 25 with the attachment piece 23 being passed through the groove 22.

  Although not shown, the upper mold 3 can be attached to the slide 2 with a similar structure. However, when the workpiece 20 is pressed and processed by the upper mold 3 and the lower mold 6, the upper mold 3 and the slide 2 are deformed so as to warp upward, and the lower mold 6 The bolster 5 is deformed so as to warp downward, and the accuracy of the workpiece 20 as a product is reduced.

  Therefore, it is conceivable to grasp the above-described deformation amount and correct the deformation amount. For this purpose, there is a method of grasping the above-described deformation amount by using a deformation simulation program or by calculating. In addition, as shown in FIGS. 5 and 7 to 9, there is a method in which a plurality of sensors 30 are attached to the press mold apparatus 1 to measure and grasp the deformation amount. Then, the amount of deformation is used as a correction amount in consideration of the compression rate of a mold or a press machine.

  An acceleration sensor is used as the sensor 30 to measure the acceleration in the press load direction, and the measured acceleration is integrated twice to calculate the displacement of the bolster 5 and the slide 2. That is, the acceleration signal output from the acceleration sensor is time-integrated to generate a time-dependent speed signal at each position of the acceleration sensor, and then the speed signal is time-integrated to obtain the dynamic displacement amount at each position. Corresponding temporal displacement signals are generated and digitized to obtain absolute dynamic displacement amounts at the respective arrangement positions.

  Similarly, the sensor 30 is measured using a strain gauge. In this case, if the measured values are analyzed by giving an analysis condition close to that of the actual product and the strain values match, the analysis result is considered to simulate the actual product. This is because the calculational deflection is understood to represent the actual deflection.

  First, as shown in FIG. 5, the sensor 30 is attached to the front and back surfaces of the bolster 5 or the mounting groove 21, specifically, for example, to the bottom surface of the mounting groove 21. As shown in FIG. 7, the sensors 30 are arranged in a cross in plan view with a predetermined interval so as to intersect at the center of the bolster 5 (also the center of the lower mold 6). This is an arrangement in which the number of sensors 30 can be reduced as much as possible.

  Further, as shown in FIG. 8, many sensors 30 are arranged on the bolster 5 in a substantially concentric elliptical shape and near the center. As a result, although the number of arrangements is large, the arrangement is concentrated on the central portion, so that an appropriate highly accurate measurement value can be obtained. Furthermore, as shown in FIG. 9, the sensors 30 are arranged evenly. Although the number of arrangements is considerably large, a highly accurate measurement value can be obtained.

  By arranging the sensors 30 as described above and performing pattern matching, an image of a pattern matching diagram (contour line) based on the output from each sensor 30 is shown in FIG. The amount of deformation is the largest, and decreases toward the end. Therefore, it is possible to grasp how much deformation occurs in which part of the bolster 5 based on the measurement value from each sensor 30. Similarly, although not shown, it is possible to grasp how much deformation occurs in which part of the slide 2 by arranging the sensor 30 in the slide 2.

  Therefore, as shown in FIG. 2 and described above, the protrusion protrudes into the recess 6A formed on the bottom surface of the lower mold 6 through the shim 11 having a thickness corresponding to the deformation amount based on the measured value of the sensor 30. The member 12 is disposed, and the shim 11 and the protruding member 12 are fixed to the lower mold 6 with a plurality of bolts 13.

  Further, the protruding member 16 is disposed in the recess 3A formed on the upper surface of the upper mold 3 via a shim 15 having a thickness corresponding to the deformation amount based on the measurement value of the sensor 30, and the upper mold The shim 15 and the protruding member 16 are fixed to the mold 3 with a plurality of bolts 17.

  In this case, the shims 11 and 15 are made of, for example, a steel plate. However, the thickness may be uniform on a flat surface, but the thickness may be different depending on the part. The shims 11 and 15 are prepared in various thicknesses, but a plurality of the same or different thicknesses may be used.

  Furthermore, as shown in FIG. 2, the projecting member 16 that is the portion having the largest deformation amount on the upper surface of the upper mold 3 toward the slide 2, for example, the projection that protrudes smoothly in the vicinity of the central portion and the outer end portion is low. Is formed at a thickness corresponding to the amount of deformation based on the measurement value of the sensor 30 disposed on the slide 2, and is the portion having the largest amount of deformation toward the bolster 5 on the lower surface of the lower mold 6. The protruding member 12 that protrudes most smoothly in the vicinity of the central portion and low in the outer end portion is formed with a thickness corresponding to the amount of deformation based on the measured value of the sensor 30 disposed in the bolster 5. That is, the protruding members 16 and 12 are formed smoothly so that the degree of protrusion gradually decreases from the vicinity of the center to the outer end.

  As described above, the projecting members 12 and 16 are formed via the shims 11 and 15 that allow for the deformation of the slide 2, bolster 5, column 8 and the like and the molds 3 and 6. When the workpiece 20 is pressed by the upper mold 3 and the lower mold 6 by the lowering of the workpiece 3, the clearance (gap) between the upper mold 3 and the lower mold 6 is desirable. The accuracy of the workpiece material as a product can be increased.

  Accordingly, when the workpiece 20 is pressed and processed by the upper mold 3 and the lower mold 6, the accuracy of the workpiece 20 as a product can be prevented from falling, and the shims 11 and 15 can be made thick. A practical press die that can adjust the protruding amount of the protruding member 12 (from the lower end of the lower die 6) and the protruding amount of the protruding member 16 (from the upper end of the upper die 3) by exchanging them with different ones. An apparatus can be provided.

  In addition, although the shim and the protruding member are disposed in the lower mold 6 and the upper mold 3, the present invention is not limited to this, and the shim and the protruding member may be formed only in one of them.

  Next, a second embodiment will be described with reference to FIG. An adjustment member 33 in which a protruding member 32 protruding upward through a shim 31 is disposed in a recess 30 formed on the upper surface is disposed between the upper mold 3 and the slide 2.

  More specifically, projecting members 32 projecting upward through shims 31 in a recess 30 formed on the upper surface of the adjusting member 33 are fixed to the adjusting member 33 by bolts 34 at, for example, four locations. Then, for example, at four locations on the outer edge of the lower end of the adjustment member 33, a groove 35 opened from the outside and a notch 36 communicating with the groove 35 are formed, and each groove 35 and each notch 36 of the adjustment member 33 is supported. Similarly, a groove 37 and a notch 38 communicating with the groove 37 are similarly formed at the four positions on the upper end of the upper mold 3, and the shaft portion is fitted to both the notches 36 and 38 from the outside and the head portion is grooved. The adjusting member 33 is fixed to the upper mold 3 by the bolt 40 so that the nut 39 is accommodated in the groove 37 and the adjusting member 33 is fixed to the slide 2.

  As described above, the portion having the largest deformation amount in the recess 30 formed on the upper surface through the shim 31 has a high upward protrusion degree and gradually protrudes toward the outer end part. An adjustment member 33 provided with a protruding member 32 that lowers (smoothly lowers) is disposed between the upper mold 3 and the slide 2, but the adjustment member 33, the protruding member 32 and shim 31 are formed with a thickness corresponding to the amount of deformation based on the measured value of the sensor 30.

  Further, as described above, in FIG. 10, the adjusting member is disposed between the upper mold 3 and the slide 2, but not shown, but between the lower mold 6 and the bolster 5. May be arranged in a similar structure, or may be arranged only in one of them. Such an adjusting member (including a projecting member) has a degree of projection that matches the deformation of the slide 2 and the bolster 5 when the workpiece 20 is pressed by the upper mold 3 and the lower mold 6 to perform processing. Creation, that is, creation for each press die apparatus 1.

  The present invention has been described with reference to a press mold apparatus, that is, a press machine as a molding machine and a press mold as a mold. However, the present invention also applies to an injection molding machine as a molding machine and an injection mold as a mold. It can also be applied to forging and die casting. That is, it can be applied as a correction structure when the molding machine and the mold are deformed when pressurized.

  Although the embodiments of the present invention have been described above, various alternatives, modifications, and variations can be made by those skilled in the art based on the above description, and the present invention is not limited to the various alternatives described above without departing from the spirit of the present invention. It includes modifications or variations.

It is a front view of a press die apparatus. It is a principal part vertical front view of a press die apparatus. It is a perspective view of a bolster. It is a fragmentary perspective view which shows the attachment state of the lower metal mold | die to a bolster. It is a partial front view of the state which has arrange | positioned the sensor to the bolster. It is a figure showing the image of a type-matching diagram. It is a top view of the bolster which has arrange | positioned the sensor. It is a top view of the bolster which has arrange | positioned the sensor. It is a top view of the bolster which has arrange | positioned the sensor. It is a principal part vertical front view of the press die apparatus of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Press die apparatus 2 Slide 3 Upper die 3A Recessed part 5 Bolster 6 Lower die 6A Recessed part 11, 15 Shim 12, 16 Projection member 30 Recessed part 31 Shim 32 Projection member 33 Adjustment member

Claims (4)

  A press mold that includes a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and pressurizes a material to be processed by the upper mold and the lower mold. In the apparatus, a lower projecting member projecting downward from the bottom surface of the lower mold is disposed through a shim in a recess formed on the bottom surface of the lower mold, and / or a recess formed on the upper surface of the upper mold. A press mold apparatus, wherein an upper projecting member that projects upward from the upper surface of the upper mold through a shim is provided.   A press mold that includes a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and pressurizes a material to be processed by the upper mold and the lower mold. In the apparatus, a portion having the largest deformation amount in the processing of the bottom surface of the lower mold through a shim in a recess formed on the bottom surface of the lower mold has a high degree of protrusion downward and the outer end of the bottom surface A lower projecting member whose projecting degree gradually decreases as it goes to the part is disposed, and / or when the upper mold upper surface is processed through a shim in a recess formed in the upper mold upper surface. The press mold apparatus is characterized in that an upper projecting member is provided such that the part with the largest amount of deformation has a high degree of projecting upward, and the degree of projecting gradually decreases toward the outer end of the upper surface. .   A press mold that includes a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and pressurizes a material to be processed by the upper mold and the lower mold. In the apparatus, a lower adjustment member in which a lower protrusion member that protrudes downward through a shim is disposed in a recess formed on the lower surface is disposed between the lower mold and the bolster, and / or on the upper surface. A press mold apparatus, wherein an upper adjustment member in which an upper projecting member projecting upward through a shim is disposed in a formed recess is disposed between the upper mold and the slide.   A press mold that includes a slide capable of moving up and down provided with an upper mold and a bolster provided with a lower mold, and pressurizes a material to be processed by the upper mold and the lower mold. In the apparatus, the portion having the largest amount of deformation during the processing through the shim in the recess formed on the lower surface has a high degree of protrusion downward, and the degree of protrusion gradually decreases toward the outer end. A lower adjustment member provided with a lower projecting member is disposed between the lower mold and the bolster, and / or a deformation amount at the time of machining is formed through a shim in a recess formed on the upper surface. An upper adjustment member provided with an upper protruding member is disposed between the upper mold and the slide so that the largest portion has a high degree of upward protrusion and gradually decreases toward the outer end. A press mold apparatus characterized by being arranged.

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