JP2009012019A - Press die - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove foreign matters stuck in a press die during machining. <P>SOLUTION: The press die comprises a lower die arranged opposite to a lifting upper die, a holding plate 4 supported at the lower position of the upper die via an elastic member 8 and sandwiching a work 20 with the lower die, and a die 3 supported with the upper die and moving relatively to a side surface of the holding plate 4, keeping a setting distance thereto, wherein a projecting felt member 5 is provided on the side surface of the holding plate 4, and the projection amount of the felt member 5 projecting from the side surface of the holding plate 4 to the projecting tip end is formed larger than the setting distance. This constitution allows the felt member 5 to slide on the side surfaces of the die 3, so that the foreign matters stuck on the inside of the die 3 are removed at each molding cycle. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a press die, and more particularly, to a technique for removing foreign matter adhering to a die during press working.

  Conventionally, a press machine is moved up and down at predetermined time intervals, and a punch or die attached as an upper die is selectively repeated in a protruding state and a non-protruding state, thereby bending or punching a predetermined part of a workpiece. There is known a press die for performing the pressing process.

  However, when the press working is continuously performed, foreign matter such as material residue generated during the processing may accumulate in the gap between the punch or die and the plate adjacent thereto. When removing such foreign matter, after removing the press mold from the press machine, the part of the mold is disassembled so that it can be easily cleaned.

  On the other hand, with the die attached to the press machine, the upper stripper plate is raised, and the punch is fixed in a state of protruding from the stripper plate, so that foreign matter adhering to the side surface of the punch can be cleaned. The technique to do is disclosed (refer patent document 1). According to this, since the cleaning time can be shortened, a decrease in production efficiency can be suppressed.

JP 2006-102801 A

  By the way, among the workpieces for press working, for example, there are those in which the surface of a metal plate is previously coated. In such a workpiece, the coating film is easily peeled off at the time of pressing, and when this adheres to the mold and adheres, scratches such as dents are caused on the painted surface of the workpiece. And since the painted surface of this workpiece becomes the design surface of the product as it is, the product after pressing becomes a defective appearance product.

  For example, in the case of using the technique of Patent Document 1, since a predetermined amount of foreign matter adhered to the mold is cleaned after the production is stopped, the production is performed with a predetermined amount of foreign matter adhered to the mold. This is unavoidable and increases the possibility of scratching the painted surface of the product. In order to avoid this, it is necessary to increase the frequency of cleaning. In this case, however, there is a problem that the production efficiency is lowered.

  This invention makes it a subject to remove the foreign material adhering in a metal mold | die during a process.

  In order to solve the above problems, a press die according to the present invention is supported by an upper die that moves up and down, a lower die that is disposed opposite to the upper die, and an elastic member below the upper die. In a press mold comprising a press plate that holds a workpiece between the press plate and a die that is supported by the upper die and moves relative to the side surface of the press plate while maintaining a set distance. Is provided with a protruding felt member, and the felt member is characterized in that the amount of protrusion from the side surface of the holding plate to the tip of the protrusion is formed larger than the set distance.

  By interposing the felt member in the gap with the die in this way, the felt member slides on the side surface of the die when the die moves, so that foreign matter adhering to the side surface of the die is removed from the side surface of the die by the felt member. Is done. And since this operation | movement is performed for every molding cycle, the foreign material adhering to die | dye can be removed with high efficiency, and since it is not necessary to stop production, the fall of production efficiency can be prevented. .

  In this case, the felt member has a substantially triangular cross section and is arranged so as to be inclined and deformed in accordance with the relative movement direction of the die. It includes a groove below the lower end and a groove formed in the die, and the groove has a groove width and a groove depth surrounding the felt member.

  That is, when the die moves relative to the presser plate, that is, the felt member, the felt member slides on the opposing surface of the die, and the tip of the protrusion is pressed by the die and is in a state of being inclined and deformed in the moving direction of the die. Here, by forming the concave groove on the opposing surface of the die on which the felt member slides, the pressing force applied to the felt member when the felt member is housed in the concave groove can be temporarily released. As a result, the felt member can be vibrated, and foreign matter adhering to the filter member can be removed.

  Furthermore, by releasing the pressing force applied to the felt member at two locations below the lower end of the die and in the groove, when the die moves up and down, the direction in which the tip of the protrusion tilts, that is, the felt surface in contact with the die alternately You can switch to That is, for example, by impregnating the press oil from one of the felt surfaces, the application of the press oil to the die and the removal of the foreign matter can be performed alternately in one molding. Removal can be performed more effectively.

  Here, the felt member preferably has a V-shaped groove formed on both sides of a protrusion having a substantially triangular cross section. According to this, since the deformability to the front and rear of a felt member becomes large, the removal performance of a foreign material can be improved. The felt member is preferably formed so that the tip angle of the protrusion is 40 ° to 60 ° and the V-shaped groove angle is 30 ° to 40 °.

  According to the present invention, foreign matter adhering to the mold can be removed during processing, so that improvement in production efficiency and quality can be realized.

  Hereinafter, embodiments of a press die to which the present invention is applied will be described.

  In the present embodiment, the foreign matter adhering to the mold to be removed includes not only the coating film of the workpiece, but also includes a fine metal piece generated during press processing and dust floating in the production factory. It shall be.

  FIG. 1 is a block diagram showing the entirety of a press die to which the present invention is applied. FIG. 2 is an enlarged view showing a configuration of a felt member of a press die to which the present invention is applied. FIG. 3 is a view for explaining the operation when the upper die of the press die to which the present invention is applied is lowered. FIG. 4 is an enlarged view for explaining the operation of the felt member when the die is lowered. FIG. 5 is a view showing a state when the upper die of the press die to which the present invention is applied reaches the descending end. FIG. 6 is an enlarged view showing a state when the felt member is accommodated in the concave groove. FIG. 7 is a view for explaining the operation when the upper die of the press die to which the present invention is applied rises. FIG. 8 is an enlarged view for explaining the operation of the felt member when the die is raised. FIG. 9 is a configuration diagram illustrating details of the shape of the felt member.

  As shown in FIG. 1, the press mold of the present embodiment is configured by being attached to a press machine (not shown) so that the upper mold 50 and the lower mold 60 face each other. On the other hand, when the upper die 50 moves up and down, the workpiece placed on the lower die 60 is pressed. Note that in this embodiment, an example of bending a workpiece is described.

  The upper mold 50 is fixed to the upper mold base 1, the die base 2, the die 3 that performs the molding process on the workpiece 20, the presser plate 4 that presses the workpiece 20 against the lower mold 60, and the presser plate 4. The felt member 5 is configured. The die base 2 is attached to the lower surface of the upper die base 1, and the die 3 is attached to the lower surface of the die base 2 with a set interval Δ from the side surface of the presser plate 4 as shown in FIG. The presser plate 4 is supported by being suspended below the die base 2 by a sliding bolt 7 inserted into a hole 1 a penetrating the upper die base 1 and the die base 2, and between the presser plate 4 and the die base 2. A compression spring 8 is provided. On the other hand, the lower mold 60 includes a die 10 and a lower mold base 11, and a workpiece 20 is installed on the die 10.

  Further, the upper die base 1 is provided with a bush 12 into which a guide post 13 attached to the lower die base 11 is fitted, so that the vertical movement of the upper die 50 is maintained and the behavior is suppressed. ing.

  Next, the configuration of the felt member 5 will be described. As shown in FIG. 2, the felt member 5 is fixed by screws 6 in a state where the body portion is fitted on the side surface of the presser plate 4 facing the die 3. This felt member 5 is formed by squeezing and consolidating fibers made mainly of wool or the like by applying predetermined heat and pressure, and as shown in FIG. A protrusion M having a substantially triangular cross-section having a B surface and V-shaped grooves P on both sides of the protrusion M are configured. Here, the tip angle θ1 of the protrusion M is set to 40 ° to 60 °, and the groove angle θ2 of the groove P is set to 30 ° to 40 °.

  The amount of projection from the side surface of the pressing plate 4 to the tip of the projection of the filter member 5 is set to be larger than the distance Δ between the side surface of the die 3 and the side surface of the pressing plate 4. As a result, the felt member 5 always receives a constant pressing force from the die 3 according to the overlap amount Δ ′ with the die 3. The overlap amount Δ ′ is set to such a length that the felt member 5 can slide at least on the R surface at the lower end of the die 3. This is because the R surface of the die 3 becomes the place where the workpiece 20 is most easily adhered by pressing the workpiece 20 during pressing.

  The felt member 5 holds the side surface of the die while contacting the side surface of the die 3 that moves up and down in the state where the position in the height direction is fixed by the presser plate 4 pressing the workpiece 20 to be stationary. Relative movement within a predetermined range. Here, the lower end of the moving range of the felt member 5 is set to be lower than the lower end surface C of the die 3. This position can be adjusted by, for example, the length of the sliding bolt 7 that supports the presser plate 4. On the other hand, the upper end of the moving range of the felt member 5 is set, for example, so as to be in a concave groove 3a having a rectangular cross section formed on the side surface of the die 3 facing the presser plate 4. The concave grooves 3a are formed on the side surface of the die 3 in the horizontal direction, the groove depth is larger than the overlap amount Δ ′, and the groove width has a margin so that the felt member 5 does not interfere with the groove inlet. The size is set. The concave groove 3a does not necessarily have to be set at the upper end of the moving range of the felt member 5, and in short, it only needs to be formed above the range in which the felt member 5 slides.

  Moreover, the felt member 5 may be linearly provided integrally in the horizontal direction of the presser plate 4, or may be provided separately.

  Next, operation | movement of a press metal mold | die is demonstrated using FIGS.

  As shown in FIGS. 3 and 4, when the upper die 50 is lowered and press molding is started, the presser plate 4 presses the workpiece 20 placed on the die 10, and the die 3 further descends. . As a result, the felt member 5 is pressed against the side surface of the die 3 facing the A surface and deformed in the moving direction of the die 3. Then, the pressing oil 30 impregnated in the felt member 5 is applied to the felt member 5 by automatically or manually supplying the pressing oil 30 from the A surface side to the die 3 that contacts the A surface. The workpiece 20 is press-molded. Then, the die 3 presses the workpiece 20 with the R surface at the lower end as a base point. At this time, the painted surface of the workpiece 20 is peeled off, and this becomes a foreign object 40 and adheres to the die 3.

  When the die 3 moves to the lower end and the clamping is completed, as shown in FIG. 5, the felt member 5 is in a state in which the tip end portion of the protrusion is accommodated in the concave groove 3a, and the pressing force is temporarily released. .

  Next, as shown in FIGS. 7 and 8, when the mold opening operation starts and the upper mold 50 starts to rise, the workpiece 20 starts to be released due to the rise of the die 3. As a result, the felt member 5 has its deformation direction reversed, and the B surface is pressed against the die 3 instead of the conventional A surface so that the B surface slides on the side surface of the die 3. Become.

  As a result, the foreign material 40 adhered to the die 3 is collected by the B surface of the felt member 5 and carried to the lower side of the die 3. Then, as the die 3 is raised, the felt member 5 is positioned below the lower end of the die 3 and the pressing force is temporarily released. At this time, the collected foreign matter is captured on the B surface of the felt member 5.

  When the workpiece 20 is set on the die 10 again and the next press work is started, the surface A of the die 3 slides while the surface A is pressed against the die 3 again in place of the previous surface B. The press oil 30 is applied to the surface. 5 and 6, when the felt member 5 is stored in the concave groove 3a, the pressing force is released, and the tip of the protrusion M vibrates. As a result, the foreign material 40 adhered to the felt member 5 in the previous molding is removed into the concave groove 3a and accumulated.

  In the present embodiment, in the felt member 5, in the region where the felt member 5 moves relative to the die 3 in order to perform application of press oil mainly by the A surface and removal of foreign matter by the B surface alternately. In addition, a predetermined position below the C surface serving as the lower end of the die 3 and a groove 3a are provided. That is, since the felt member 5 is slid by receiving a predetermined pressing force from the side surface of the die 3, by providing two locations for temporarily releasing the pressing force applied to the felt member 5, the upper die is formed before and after the press working. When 50 changes the moving direction, the die 3 can switch the sliding surfaces (A surface, B surface) of the felt member 5. In addition, the collected foreign matter is effectively wiped off by utilizing the vibration generated when the projection tip M of the felt member 5 is stored in the concave groove 3a.

  Therefore, in the present embodiment, the groove 3a has a rectangular cross section. However, the groove shape is also limited to a structure in which the pressing force of the felt member 5 is released and the removed foreign matter is collected. The structure is not limited to a rectangle, and is not limited to a groove, and may be a stepped structure.

  Moreover, in this Embodiment, since it is set as the structure provided with the V groove P on both sides of the processus | protrusion M in the structure of the felt member 5, the switching of the sliding surface of the felt member 5 can be made smooth. Further, since a plurality of the concave grooves 3a are provided in parallel, the foreign matter removed from the felt member 5 can be reliably accumulated.

  As described above, according to the present embodiment, the felt member fixed to the press plate is interposed in the gap between the die and the felt member is slid along the side surface of the die facing the press plate. Foreign matter adhering to the side surface of the die can be removed in each molding cycle. As a result, the foreign matter adhering to the mold can be removed with high efficiency, and a product with always stable quality can be provided. In addition, it is possible to remove foreign substances adhering to the die while the press mold is in operation, and thus it is possible to prevent a reduction in production efficiency.

  Moreover, in this Embodiment, while the polishing effect of the sliding surface by a felt member can be exhibited, press oil can be apply | coated to a sliding surface by making a felt member impregnate press oil. Thereby, for example, the sliding friction coefficient between the workpiece and the die can be reduced, and generation of wrinkles on the product surface accompanying press working can be prevented. Moreover, since the spreadability of a workpiece can be improved, wrinkles and deformation due to molding can be suppressed. In addition, by applying press oil to the side surface of the die, the adhesion force of foreign substances such as a coating film can be suppressed and the foreign substances can be easily removed.

  The felt member of the present embodiment has been described with respect to an example in which a predetermined shape is formed using wool or the like as a main raw material. For example, if it has an effect of removing foreign substances and a predetermined impregnation property, It is not limited to examples.

  Further, the press die according to the present embodiment has been described by taking a bending die as an example. However, the present invention is not limited to this, and the technology of the present invention also applies to a die used for punching or deep drawing. By attaching the felt member based on the idea, the same technical effect as the present invention can be obtained.

It is a block diagram which shows the whole press metal mold | die formed by applying this invention. It is an enlarged view which shows the structure of the felt member of a press die formed by applying this invention. It is a figure explaining operation | movement at the time of the upper mold | type of the press die formed by applying this invention descend | falling. It is an enlarged view explaining operation | movement of the felt member when the die | dye of the press die formed by applying this invention descend | falls. It is a figure which shows a state when the upper mold | type of the press die formed by applying this invention has reached to the falling end. It is an enlarged view which shows a state when the felt member of the press die formed by applying this invention is accommodated in the ditch | groove. It is a figure explaining operation | movement at the time of the upper mold | type of the press metal mold | die formed by applying this invention rising. It is an enlarged view explaining operation | movement of the felt member when the die | dye of the press die formed by applying this invention raises. It is a block diagram explaining the detail of the shape of the felt member of the press die formed by applying this invention.

Explanation of symbols

3 Die 3a Groove 4 Presser plate 5 Felt member 20 Work material 40 Foreign material 50 Upper die 60 Lower die

Claims (4)

An upper die that moves up and down, a lower die that is disposed opposite to the upper die, and a presser plate that is supported by an elastic member below the upper die and sandwiches a workpiece between the lower die, In a press die that is supported by the upper die and includes a die that moves relative to the side surface of the presser plate and maintains a set distance,
A protrusion-like felt member is provided on a side surface of the presser plate, and the felt member is formed such that a protrusion amount from a side surface of the presser plate to a protrusion tip is larger than the set distance. Press mold.   The felt member has a substantially triangular cross section and is arranged to be inclined and deformed according to the relative movement direction of the die. In the region where the felt member moves relative to the die, 2. The press according to claim 1, further comprising a groove below the lower end of the die and a groove formed in the die, the groove having a groove width and a groove depth surrounding the felt member. Mold.   3. The press die according to claim 2, wherein the felt member is formed with a V-shaped groove on both sides of a protrusion having a substantially triangular cross section.   4. The press plate according to claim 3, wherein the felt member has a tip angle of 40 ° to 60 °, and a V-shaped groove angle of 30 ° to 40 °. Type.

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