JP6427438B2 - Mold of press processing device and press processing device - Google Patents

Description

  Embodiments of the present invention relate to a die of a pressing apparatus and a pressing apparatus.

  Generally, separation processing, molding processing and the like are known as press processing. And the apparatus used for these processes is generally called a press processing apparatus. The press processing apparatus places, for example, a workpiece between molds consisting of an upper die (also referred to as a punch) and a lower die (also referred to as a die), sandwiches and presses the workpiece with these dies, Process the workpiece into the desired shape.

  The separation processing is to make a shape by cutting a work material. For example, as an example of separation processing, punching processing is known, in which a workpiece is placed on a lower mold and the upper mold is used to remove the shape. Further, as a forming process, for example, a bending process for bending a material to be processed, a drawing process for stretching and forming a material to be processed, and the like are known.

Japanese Patent Application Laid-Open No. 2003-181569

  However, for example, in separation processing, so-called “burrs” and “sliding” occur at the start and end of the shear surface. The state of these "balls" and "sliding" differs depending on the thickness of the plate of the workpiece, the type of the workpiece, the processing speed, the clearance and the like. The occurrence of a large number of “drops” impairs the flatness of the sheared surface, which is a problem when the flatness of the sheared surface is required. In addition, since the "ball" has a sharp tip, it causes an injury and a product failure.

  Further, in the forming process, there is a possibility that the quality may be deteriorated due to the occurrence of so-called "scratch" or "break" at the time of bending process due to the thickness of the plate of the process material, the type of the process material, processing speed, clearance and the like. In drawing, so-called "wrinkles" or "cracks" may occur depending on the thickness of the plate of the material to be processed, the type of the material to be processed, the processing speed, the clearance and the like.

  So, in this invention, it aims at providing the metal mold | die and press processing apparatus of the press processing apparatus which can process a to-be-processed material with high precision, and can improve the quality of a press-processed product.

  The mold of the pressing apparatus according to one embodiment places the workpiece between the lower mold and the upper mold, presses the upper mold toward the lower mold in a first direction, and the work material A mold of a press processing apparatus for processing, wherein the upper mold is provided on the opposite side of the working end along the first direction to the working end which contacts the work material to be stamped and the first end is vibration Is provided between the working end and the vibrating end so as to be spaced apart from each other in the second direction orthogonal to the first direction and to fix the upper mold and to fix the upper mold to the first mold. Provided between the pair of holders through the upper mold in a third direction orthogonal to the first direction and the second direction, and a pair of holders transmitting the driving force in the first direction and the third direction orthogonal to the first direction and the second direction, respectively. And an aperture.

  Further, in the pressing apparatus according to one embodiment, the work material is placed between the lower mold and the upper mold, the upper mold is pressed in the first direction toward the lower mold, and the work material is processed. A pressing mechanism for reciprocatingly driving the upper mold in a first direction, and a vibrator fixed to the upper mold to vibrate the upper mold, the upper mold being A working end which contacts and emboss the workpiece, a vibrating end provided on the opposite side of the working end along the first direction to which a vibration is given, and a second perpendicular to the first direction A pair of holding parts provided between the working end and the vibrating end in a separated manner, for fixing the upper mold and for transmitting the driving force in the first direction to the upper mold; Penetrating the upper mold in a third direction orthogonal to the direction and the second direction, between the pair of holding portions Has a hole provided, the.

  ADVANTAGE OF THE INVENTION According to this invention, the metal mold | die and press processing apparatus of the press processing apparatus which can process a to-be-processed material with high precision, and can improve the quality of a press-processed product can be provided.

FIG. 1 is a schematic view showing the structure of a pressing apparatus according to an embodiment of the present invention. FIG. 2 is a schematic view of a movable side portion of the pressing apparatus of FIG. 1 as viewed from the direction of F2. FIG. 3 is a schematic view of the stationary side portion of the pressing apparatus of FIG. 1 as viewed from the direction of F3. FIG. 4 is a perspective view of the upper mold fixed to the pressing apparatus of FIG. FIG. 5 is a diagram of a vibration simulation result showing that the vibration is transmitted to the upper mold of FIG. FIG. 6 is a diagram of a vibration simulation result showing that the vibration is transmitted to the upper mold of FIG. FIG. 7 is a cross-sectional photograph of the workpiece W in the case where separation processing is performed by giving vibration to the upper die according to the present embodiment. FIG. 8 is a cross-sectional photograph of the workpiece W in the case where separation processing is performed by giving vibration to the upper die according to the present embodiment. FIG. 9 is a cross-sectional view of the workpiece W when separation processing is performed using a conventional mold. FIG. 10 is a cross-sectional view of the workpiece W when separation processing is performed using a conventional mold.

  Hereinafter, the press processing apparatus 1 which concerns on one Embodiment of this invention is demonstrated. Although a mold (upper mold 10 and lower mold 30) intended for separation processing is attached to the press processing apparatus 1 according to the present embodiment, a mold that can be used for this press processing apparatus 1 Is not limited to this. For example, the press processing apparatus 1 of the present embodiment can be used for other press processing such as bending processing and drawing processing. Further, the present invention can be applied to dies generally used for press working such as punching, bending, drawing, molding, compression, bonding and the like.

  FIG. 1 is a schematic view showing the main structure around the mold of the pressing apparatus 1.

  An imaginary line O indicated by a broken line is a straight line in the Z direction passing through the center of mass G of the upper mold 10. In the following description, this virtual line O is referred to as a central axis O. The movable side portion 2 described below is reciprocally driven by the drive mechanism 6 along the central axis O, and a workpiece is formed between the upper mold 10 of the movable side portion 2 and the lower mold 30 of the fixed side portion 3 The separation process is performed with W interposed.

  The pressing apparatus 1 has a movable side portion 2 having an upper die 10 and a fixed side portion 3 having a lower die 30. The movable side portion 2 has an upper mold 10, fixing plates 44a and 44b for fixing the upper mold 10, and a support 47 for fixing the fixing plates 44a and 44b to the upper mold holder 41. The upper mold holder 41 and the support 47 are fixed by bolts 46. Similarly, the support 47 and the fixing plates 44 a and 44 b are fixed by bolts 46. The upper mold 10 is fixed by the fixing plates 44a and 44b only at two holding portions 15 described later, and the other parts are not fixed. That is, when the upper mold 10 is vibrated by the vibrator 20 described later, the vibration is not transmitted to the stripper 45 or the support 47.

  The movable side portion 2 has a stripper 45 for peeling off when the workpiece W is attached to the upper die 10, a spring 48 for biasing the stripper 45 toward the lower die 30, and a guide for stabilizing the posture of the stripper 45 It has a pin 43. In addition, a vibrator 20 is provided at a vibrating end 14 of the upper mold 10 which will be described in detail below.

  The fixed side portion 3 has a lower die 30 and a lower die holder 42 for fixing the lower die 30. The lower die 30 has a hole 31 having a shape corresponding to the shape of the upper die 10 and a hole 33 for receiving the guide pin 43. The press processing apparatus 1 includes a motor for applying a force necessary for processing to the mold, a drive mechanism 6 such as a flywheel, a control mechanism (not shown) for controlling these, a safety device (not shown), etc. Is equipped.

  FIG. 2 is a schematic view of the movable side portion 2 of the pressing apparatus 1 shown in FIG. 1 as viewed in the direction of the arrow F2 of FIG. The stripper 45 is a rectangular plate-like member having a hole through which the upper die 10 passes in the central portion. The stripper 45 is provided so as to be movable in the central axis O direction along the two guide pins 43.

  Further, as shown by a broken line, a cylindrical vibrator 20 is provided at the center of the upper mold 10 on the vibrating end 14 side. The vibrator 20 is fixed to the vibrating end 14 of the upper mold 10 in a posture in which the central axis thereof overlaps with the central axis O.

  FIG. 3 is a schematic view of the stationary part 3 of the press processing apparatus 1 shown in FIG. 1 as viewed in the direction of the arrow F3 of FIG. The lower mold 30 is a rectangular metal member having a predetermined thickness, and is stacked on the lower mold holder 42 and fixed by a bolt 34. In the central portion of the lower mold 30, a hole 31 which is molded in a shape corresponding to the upper mold 10 is provided. The holes 31 are formed to be slightly larger than the upper mold 10, and a predetermined clearance is provided between the upper mold 10 and the holes 31. The predetermined clearance is a gap between the upper mold 10 and the hole 31 of the lower mold 30, which is appropriately designed according to the thickness of the workpiece W, material characteristics, processing accuracy, and the like.

  Subsequently, the upper mold 10 will be described using FIGS. 1 and 4.

  FIG. 4 is a perspective view of the upper mold 10. Hereinafter, the driving direction (vertical direction in the drawing) of the upper mold 10 is referred to as Z direction (first direction), the horizontal direction in the drawing orthogonal to the Z direction is referred to as X direction (second direction), and the Z direction and X direction are respectively Let the illustrated front-back direction orthogonal to be Y direction (3rd direction). A central axis O along the Z direction passes through the center of mass G of the upper mold 10. Further, a first virtual surface P which is orthogonal to the central axis O and passes through the center of mass G of the upper mold 10 is a surface which bisects the upper mold 10 vertically along the central axis O.

  Further, a surface overlapping the central axis O and bisecting the upper mold 10 along the XZ plane is taken as a second virtual surface R. In addition, a surface that passes through the central axis O and is orthogonal to the first virtual surface P and the second virtual surface R and that bisects the upper mold 10 along the YZ plane is a third virtual surface S. Further, a line passing through the center of mass G and orthogonal to the central axis O and extending along the Y direction is taken as an imaginary line Q.

  The upper mold 10 according to the present embodiment is a rectangular block-shaped member made of metal. The upper mold 10 has an oscillating surface 14a orthogonal to the central axis O at one end (oscillating end 14) in the driving direction, and an operating surface 13a (figure at the other end (operating end 13) in the driving direction). 2). The vibrating surface 14a and the working surface 13a are congruent. The upper die 10 also has four side surfaces connecting each side of the vibrating surface 14 a and each side of the working surface 13 a. Two curved surfaces intersecting the imaginary line Q are referred to as first side surfaces 17, and two flat surfaces along the other YZ plane are referred to as second side surfaces 18.

  Convex holding parts 15 extending in the Y direction along the first virtual surface P are integrally provided at intermediate positions in the Z direction of the two second side surfaces 18 respectively. These two holding parts 15 are fixed to the movable side part 2 by fixed plates 44a and 44b.

  The first side surface 17 is formed in accordance with the shape of the curved peripheral edge of the corresponding side of the working surface 13a. That is, the first side surface 17 is formed in a shape in accordance with the processed shape of the workpiece W. In the present embodiment, the first side surface 17 is formed in a shape that is recessed inward in a circular arc toward the center of mass G. For example, as shown in FIG. 3, when the processing shape of the workpiece W is a gear type, the first side surface 17 is provided with the corresponding unevenness. The two first side surfaces 17 have the same shape. In other words, the upper mold 10 is formed to be symmetrical via the second virtual surface R.

  In addition, the upper mold 10 has a hole 16 communicating the two first side surfaces 17 and penetrating the upper mold 10 in the Y direction. The holes 16 have an oval cross-sectional shape extending in the Z direction. The center of mass G of the upper mold 10 is at the center of the hole 16.

  The upper mold 10 is a symmetrical shape which is bisected by the first virtual surface P. The lower mold 30 side of the first virtual surface P is referred to as a first portion 11. The upper die holder 41 side of the first virtual surface P is referred to as a second portion 12. The first portion 11 and the second portion 12 are integrally formed of the same metal material. Therefore, the masses of the first portion 11 and the second portion 12 are substantially the same. Here, “substantially the same” includes those that fall within a preset tolerance range.

  The first portion 11 has an action surface 13 a which presses the workpiece W in contact with the workpiece W shown in FIG. 1. In addition, the second portion 12 has a vibrating surface 14 a that fixes the vibrator 20 and is a start position of vibration to the upper mold 10. Furthermore, the upper mold 10 has an oblong hole 16 penetrating the upper mold 10 along the imaginary line Q.

  In order to make the mass of the first portion 11 and the second portion 12 the same, the holes 16 are provided at positions where the volume is divided into two equal halves of the first virtual surface P. The shape of the hole 16 is not limited to the illustrated shape. The shape and position of the holes 16 are designed based on the vibration simulation of the upper die 10, and are determined such that the vibration is most efficiently transmitted from the vibration surface 14a to the working surface 13a.

  In addition, the upper mold 10 according to the present embodiment is formed to be symmetrical with respect to the second virtual surface R. Furthermore, the upper mold 10 is formed to be symmetrical with respect to the third virtual surface S.

  The vibrator 20 is, for example, a cylindrical member, and is a device that oscillates a vibration of a predetermined frequency from one end to vibrate the object. The vibration frequency is not particularly defined, but if sound vibration in the audible range is used, the operation sound of the transducer 20 may be anxious in pressing, so the vibration frequency in the so-called ultrasonic range, which is the inaudible range, It is used.

  In the present embodiment, as shown in FIG. 1, the vibrator 20 is provided in contact with the vibration surface 14 a of the upper mold 10. Furthermore, as shown in FIG. 2, the vibrator 20 is fixed to the upper mold 10 in a posture in which the central axis O passing through the center of mass G of the upper mold 10 and the central axis of the vibrator 20 overlap. The vibration frequency oscillated from the vibrator 20 is a so-called ultrasonic wave. Specifically, the frequency of vibration oscillated from the vibrator 20 is, for example, in the range of 10 kHz to 30 kHz. The vibration oscillated from the vibrator 20 vibrates the upper mold 10 in the Z direction. The frequency given to the upper mold 10 from the vibrator 20 is not limited to the above range.

  The frequency of vibration given to the upper mold 10 changes depending on the mass and shape of the upper mold 10 or the size and position of the hole 16. For this reason, when the shape of the upper mold 10 is fixed, the vibration frequency is measured using vibration simulation. Specifically, the optimum frequency of vibration given to the upper mold 10 is a frequency at which the vibration from the vibration surface 14a is efficiently conducted to the action surface 13a. This is, for example, near the natural frequency of the upper mold 10, and the frequency at which resonance occurs is selected.

  Subsequently, an operation of punching out the workpiece W by the press processing device 1 according to the present embodiment will be described. The worker turns on the power to the press processing device 1 and drives the drive mechanism 6 of the press processing device 1. After the pressing device 1 is driven, the vibrator 20 fixed to the vibrating end 14 is driven. The vibration generated from the vibrator 20 is conducted to the upper mold 10. Upper mold 10 starts fine high-speed vibration in the Z direction. Subsequently, the worker places the workpiece W on the surface 32 opposed to the upper mold 10 of the lower mold 30. At this time, the operator confirms the punching position of the workpiece W, and sets the workpiece W at a predetermined position on the surface 32. Then, the operator operates the press processing apparatus 1 to close the upper die 10 fixed to the movable side portion 2 toward the lower die 30 fixed to the fixed side portion 3 (in the Z direction). Make it work. Thus, first, the stripper 45 of the movable side portion 2 contacts the workpiece W to press the workpiece W. When the movable side portion 2 is further driven, the upper die 10 protrudes from the hole in the central portion of the stripper 45 and abuts on the workpiece W, and the workpiece W is punched out. Thereafter, the upper mold 10 is inserted into the hole 31 of the lower mold 30.

  When the punching operation of the workpiece W by the upper die 10 is completed, the movable side portion 2 is driven in the reverse direction, and the upper die 10 is separated from the lower die 30. At this time, the stripper 45 returns to the position of FIG. 1 by the biasing force of the spring 48, and peels off the workpiece W stuck to the upper die 10.

  Subsequently, a result of verification of how the vibration given from the vibrator 20 is transmitted to the action surface 13a to the vibration surface 14a of the upper die 10 will be described using vibration simulation. Results of vibration simulation of the upper die 10 are shown in FIG. 5 and FIG. First, vibration simulation of the upper mold 10 will be described.

  First, the upper mold 10 incorporated in the pressing apparatus 1 is designed on a computer. Vibration simulation was performed using the designed upper mold 10 (hereinafter referred to as upper mold model 10a). In the upper mold model 10a as well, portions common to the upper mold 10 are denoted by the same reference numerals, and the detailed description thereof is omitted. The vibration simulation means the conduction state of the vibration in the upper mold model 10a and the deformation state of the upper mold model 10a when various vibrations are given from the vibrating end 14 of the upper mold model 10a designed on the computer. To visually represent and to grasp its characteristics.

  5 and 6 show the upper model 10a as viewed in the Y direction shown in FIG. Briefly described, the vibrating end 14 is shown on the upper side of the drawing, and the working end 13 is shown on the lower side of the drawing, and two holding parts 15 are shown at an intermediate position between the vibrating end 14 and the working end 13. Also, an oblong hole 16 is shown at the center of the upper model 10a. The lower part in the drawing is the first portion 11, and the upper part in the drawing is the second part 12. In the vibration simulation, the upper mold model 10a is simulated on the assumption that it is fixed to the fixed plates 44a and 44b of the movable side portion 2 as shown in FIG.

  The white stripes in FIG. 5 and FIG. 6 indicate places where vibration occurs in the upper mold model 10 a in the vibration simulation. In the vibration simulation, the vibration given to the upper mold model 10a is mainly composed of the vibration (hereinafter referred to as the vertical vibration 51) of the component that vibrates the upper mold model 10a in the first direction.

  When vibration of a frequency close to the natural frequency of the upper mold model 10a and at which the upper mold model 10a resonates is given to the vibration end 14 of the upper mold model 10a, good simulation results are obtained. That is, according to the upper mold model 10 a, it was found that the vibration given from the vibrating end 14 was conducted without damping to the working end 13, and the vibration given to the vibrating end 14 could be reproduced at the working end 13. In other words, when vibration of a certain frequency is given, the upper model 10a vibrates at high speed in the vertical direction along the central axis O despite being fixed by the holding unit 15.

  The results will be described in more detail. The vibrations given by the vibrating end 14 are conducted as longitudinal vibrations 51 towards the working end 13. The energy of the longitudinal vibration 51 changes its direction at the position of the fixed holder 15. That is, a clear white stripe pattern indicating the energy of the longitudinal vibration 51 disappears and is shown as a white mist. In other words, the energy of the longitudinal vibration 51 spreads in the lateral direction and changes to the lateral vibration 52. The energy changed to the vibration 52 in the lateral direction is converted into energy to vibrate the upper mold 10 in the lateral direction by opening and closing the hole 16 having an oval cross-sectional shape in the X direction as shown in FIGS. Be done. Thereafter, the vibrational energy in the lateral direction is conducted to the first portion 11 side beyond the holding portion 15. The vibration energy beyond the holding portion 15 which is the fixed position is reconverted into the vibration 51 in the longitudinal direction and is transmitted to the working end 13.

  As described above, the upper mold model 10 a converts the vibration continuously applied from the vibrator 20 into the vibration energy in the lateral direction, which repeatedly opens and closes the hole 16 at the position of the holding portion 15, thereby fixing the fixed position. It is possible to prevent the vibration from being largely damped and to conduct the vibration to the working end 13 side.

  On the other hand, in order to study the optimum condition of vibration transmission, various upper model models having a shape different from that of the upper model 10a of this embodiment were designed and vibration simulation was similarly performed.

  As a model of the upper mold verified, for example, a model in which the hole 16 is not provided in the upper mold, a model in which the shapes of the first portion 11 and the second portion 12 are different, and the mass of the first portion 11 and the second portion 12 Is a different model, a model in which the upper mold hole 16 is not penetrated, or the like. In addition, the setting conditions of the vibration simulation of the upper mold model for verification are the conditions (the fixed state of the holding portion, the position of the vibrator, the vibration component, etc.) other than the conditions (shape, mass, holes, etc.) of the upper mold model. The conditions were the same as the conditions used for the vibration simulation of the upper model 10a.

  As a result, in the case of any upper model, significant damping of vibration was observed at the working end 13 side. That is, the model of the upper mold having these shapes could not sufficiently conduct the vibration given to the vibrating end 14 to the working end 13.

  First of all, it is conceivable that it is difficult to reproduce the vibration of the second portion 12 by the first portion 11 beyond the holding portion 15 when the mass of the first portion 11 and the second portion 12 are different. Second, when the hole 16 is not penetrated or not provided, there is no escape place for the vibration transmitted from the vibrating end 14, so the vibration is largely observed in the holding portion 15 which is the fixed portion of the upper die 10. It is considered to be attenuated. For example, in the other upper model described above, it is considered that the vibration could not be well transmitted to the working end 13 due to the above two reasons. If the holding portion 15 can be eliminated and the upper die 10 can be maintained in a free state without being fixed, vibration transmission is possible even without the hole 16. However, without the holding portion 15, the driving force from the drive mechanism 6 of the pressing device 1 can not be transmitted to the upper die 10.

  In consideration of the above points, preferable configuration conditions of the upper mold 10 obtained from the above-described vibration simulation results are summarized as follows.

The masses of the first portion 11 and the second portion 12 are the same.
A hole 16 penetrating the upper mold 10 along the imaginary line Q is provided.
It is symmetrical through the first virtual plane P.
-It is symmetrical through the second virtual surface R.
It is symmetrical via the third virtual surface S.
· Being fixed by the holding unit 15
The above is the preferable configuration conditions of the upper mold 10. However, depending on the shape of the upper mold 10, for example, the holes 16 do not necessarily have to be provided along the imaginary line Q by vibration simulation, and the holes 16 are manufactured in consideration of the result of the vibration simulation.

  Next, the difference between the sheared surface of the workpiece W separated and processed using the upper mold 10 according to the present embodiment and the sheared surface of the workpiece W of the comparative example will be described.

  FIG.7 and FIG.8 is the cut surface photograph of the to-be-processed material W at the time of performing isolation | separation processing, giving the vibration oscillated from the vibrator | oscillator 20 to the upper mold 10 which concerns on this embodiment. On the other hand, FIG.9 and FIG.10 is a cut surface photograph of the to-be-processed material W at the time of performing isolation | separation processing using the metal mold to which the vibration is not given as a comparative example. The mold of the comparative example was the same as the mold of the present embodiment.

<Processing conditions>
Machining conditions of upper die according to the present embodiment-Machining speed: 25 spm
・ Clearance: 0.03 mm
・ Visibility of vibration: Yes (20 kHz)
Processing conditions of upper mold used as comparative example ・ Processing speed: 14spm
・ Clearance: 0.2 mm
・ Visibility of vibration: No. In addition, spm shows Shot Per Minute, and shows how many pieces of pressing can be performed in one minute. In this processing condition, it has the same meaning as RPM (Revolutions per minute).

<Conditions of Workpiece W>
The workpiece W is formed of a hot-rolled mild steel plate (SPH), the plate thickness is 6 mm, and the processing shape is a gear shape. The other conditions of the pressing apparatus 1 were the same.

  According to the present embodiment, as shown in FIG. 7, it is possible to accurately cut out along the mold shape without causing a crack in the tip 200 of the gear teeth. Further, as shown in FIG. 8, according to the present embodiment, “swelling” and “burr” are hardly found in the shear surface, the surface is cut out very smoothly, and no crack or the like occurs.

  On the other hand, as shown in FIG. 9, in the case of the comparative example, a crack was generated in the tip 200 of the gear teeth. Moreover, as shown in FIG. 10, according to the comparative example, the roughness of the sheared surface was noticeable, and a crack was further generated in part. In addition, the processing speed of the separation processing which concerns on this embodiment was performed about twice the processing speed of the conventional separation processing shown in FIG.9 and FIG.10 as mentioned above.

  As described above, according to the present embodiment, in the processing of the workpiece W of the same material having the same thickness, the processing accuracy can be enhanced, and in addition, the processing speed can be increased. Further, according to the present embodiment, since the occurrence of “burr” and the like can be suppressed, the wear of the mold due to the friction between the mold (upper mold 10 or lower mold 30) and the workpiece W at the time of processing It can be reduced. For this reason, if press processing is performed while giving vibration to the upper mold 10 as in the present embodiment, the life of the mold can be approximately doubled.

  The upper mold 10 of the present embodiment has a shape that can be conducted to the working end 13 without substantially attenuating the vibration in the first direction (Z direction) oscillated from the vibrator 20. The pressing apparatus 1 according to the present embodiment operates the vibrator 20 continuously over one step (one stroke) from the start of separation processing to the end of processing to align the upper mold 10 along the central axis O. And vibrate continuously. This vibration reduces the frictional force between the workpiece W and the upper die 10 when the working end 13 of the upper die 10 contacts the workpiece W. For this reason, it can be reduced that the workpiece W is not caught on the upper mold 10 side. Furthermore, by reducing the frictional force between the workpiece W and the upper die 10, the amount of lubricating oil used can be reduced, which is economical.

  Furthermore, the vibration along the central axis O of the upper die 10 applies a number of continuous pressures to the workpiece W during one stroke of the upper die 10. For this reason, it is possible to reduce the resistance and perform separation processing even in the case of a workpiece W of a hot-rolled mild steel plate (SPH) having a thickness of 5 mm or more, which has conventionally been considered difficult to separate. For example, in the separation test using the upper die 10 of the present embodiment, it is possible to separate and process the workpiece W of the hot-rolled mild steel plate (SPH) up to a thickness of about 12 mm while maintaining the processing accuracy Met.

  Further, by using the press processing apparatus 1 and the mold (upper mold 10, lower mold 30) according to the present embodiment, for example, a material in which glass fiber is impregnated with resin as a material to be processed W, CFRP (carbon fiber Even in the case of a material containing a fibrous material such as reinforced plastic), it is possible to obtain a good sheared surface without causing peeling of the fiber layer or the like. The upper mold 10 vibrated by the vibrator 20 can continuously apply a large number of pressures to the workpiece W in one stroke, and therefore, along the XY plane orthogonal to the central axis O The laminated carbon fibers can also be cut well.

  In the processing of the workpiece W of a hot-rolled mild steel plate (SPH) having a thickness of about 6 mm, the pressing apparatus 1 according to the present embodiment has a processing speed significantly higher than that of the conventional one while maintaining processing accuracy. It is possible to raise it to Specifically, as shown in FIGS. 7 and 8, even if the processing speed was about twice that of the comparative example, no reduction in processing accuracy was observed. Therefore, mass productivity can be dramatically improved by using the press processing apparatus 1 according to the present embodiment.

  Further, the present invention is not limited to the above embodiment. In the embodiment described above, only separation processing is described among the press processing, but the press processing apparatus 1 according to the present embodiment is also applicable to other press processing by exchanging a mold, for example. Can.

  For example, the press processing apparatus 1 can also be used for bending. Here, the bending process is a process of bending a part of the material to be processed W by sandwiching the material to be processed W between the upper mold and the lower mold. In the bending process, "cracks" or "scratches" in the bent portion may be a problem. This problem occurs when a large pressure is applied to the bending portion of the workpiece W when the thickness of the workpiece W is too thick or the bending of the bending portion is insufficient.

  Therefore, for example, a bending upper die 10 designed to satisfy the preferable configuration conditions of the upper die 10 verified in the above-described separation processing is manufactured. The upper mold 10 for bending is used in combination with the vibrator 20 to perform bending while applying a large number of pressures to the workpiece W in one stroke of the upper mold 10. For this reason, concentration of pressure is prevented and the occurrence of "cracks" and "scratches" is suppressed. Further, even in the case of a work material having a thicker plate thickness than in the prior art, it is possible to process without increasing the size of the press processing apparatus.

  In addition, by using the press working apparatus 1 according to the present embodiment for bending, it is possible to suppress the occurrence of spring back which causes the so-called bending processing accuracy to deteriorate. Specifically, since the upper mold 10 vibrates in the direction of the central axis O by the vibrator 20, even in the state where the upper mold 10 and the lower mold 30 sandwich the workpiece W, a number of consecutive pressings are performed. Pressure is applied to the workpiece W. For this reason, the force to return to the original generated at the bent portion of the workpiece W is suppressed by the pressure of the upper die 10 accompanied by the high speed vibration. Thereby, it is considered that the springback of the workpiece can be suppressed and the workpiece W can be bent at a desired angle at one time.

  Moreover, for example, the press processing apparatus 1 according to the present embodiment can be used also in the drawing process. The drawing process is a process of producing a cylindrical one having a jointed one end closed by sandwiching a plate-like workpiece with a mold composed of an upper mold and a lower mold. . In the drawing process, the workpiece is pushed into the lower mold by the upper mold and stretched by the tensile force to reduce the thickness. Then, the portion around the portion pressed by the upper die of the workpiece moves toward the center along with the pressing operation of the upper die.

  For this reason, in the drawing process, the balance between the force for pulling the workpiece by the upper die and the force for pressing the workpiece on the outer periphery thereof becomes important. If this balance is lost, "wrinkles" may be generated in the outer peripheral portion of the workpiece, and in the portion where the upper die is pushed into the lower die, "cracks" may be generated.

  For example, the upper die 10 for drawing used in the press processing apparatus 1 according to the present embodiment is for drawing which is designed to satisfy the preferable configuration condition of the upper die 10 verified in the above-described separation processing. Upper mold 10 The upper mold 10 for drawing is used in combination with the vibrator 20 to perform drawing while applying pressure to the workpiece W a number of times per stroke of the upper mold 10 at one time.

  This multiple pressure reduces the residual stress of the workpiece W stretched by the tensile force, and suppresses the occurrence of the above-mentioned "cracks" and "wrinkles". Moreover, the drawing process using the press processing apparatus 1 in the present embodiment can improve the critical drawing rate.

Moreover, in this embodiment, although the to-be-processed material W has shown the hot-rolled mild steel plate (SPH) and CFRP, the to-be-processed material W is not restricted to this.
Of course, various modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Press processing apparatus, 2 ... Movable side part, 3 ... Fixed side part, 6 ... Drive mechanism, 10 ... Upper mold | type, 11 ... 1st part, 12 ... 2nd part, 13 ... Working end, 14 ... Vibration end, Reference Signs List 15 holding portion 16 hole 20 vibrator 30 lower mold 31 hole 32 surface 32 33 hole 41 upper mold holder 42 lower mold holder 43 guide pin 44a Fixed plate, 44b: Fixed plate, 45: Stripper, 46: Screw, 47: Support body, 48: Spring, 51: Longitudinal vibration, 52: Lateral vibration.

Claims (10)

A mold of a pressing apparatus for placing a workpiece between a lower die and an upper die, pressing the upper die toward the lower die in a first direction, and processing the workpiece,
The upper mold is
An operation end which contacts and emboss the workpiece;
A vibrating end provided on the opposite side of the working end along the first direction to be vibrated;
It is provided in a second direction orthogonal to the first direction, and is provided between the working end and the vibrating end to fix the upper mold and to transmit the driving force in the first direction to the upper mold. A pair of holding parts,
A hole provided between the pair of holding parts, penetrating the upper mold in a third direction orthogonal to the first direction and the second direction;
A mold of a pressing apparatus having a. The upper mold includes a first portion including the working end;
And a second portion including the vibrating end integrally formed with the first portion,
The first portion and the second portion pass through the center of mass of the upper mold and have the same mass across a flat first virtual surface orthogonal to the first direction. Mold of the described pressing apparatus. The upper mold includes a first portion including the working end;
And a second portion integrally formed with the first portion and including the vibrating end,
The first portion and the second portion are symmetrical with respect to a flat first virtual surface orthogonal to the first direction between the first portion and the second portion. Item 1. A mold of the pressing device according to Item 1.   The pressing apparatus according to claim 2, wherein the upper mold is symmetrical with respect to a second virtual surface passing through the center of mass and along the first direction and the second direction. Mold.   The pressing apparatus according to claim 2, wherein the upper mold is symmetrical with respect to a third virtual surface passing through the center of mass and along the first direction and the third direction. Mold.   The mold of a pressing apparatus according to claim 1, wherein the hole has an oval cross-sectional shape along the first direction. A pressing apparatus for placing a material to be processed between a lower mold and an upper mold, pressing the upper mold toward the lower mold in a first direction, and processing the material to be processed,
A drive mechanism that reciprocally drives the upper mold in a first direction;
A vibrator fixed to the upper mold to vibrate the upper mold;
The upper mold is
An operation end which contacts and emboss the workpiece;
A vibrating end provided on the opposite side of the working end along the first direction to be vibrated;
It is provided in a second direction orthogonal to the first direction, and is provided between the working end and the vibrating end to fix the upper mold and to transmit the driving force in the first direction to the upper mold. A pair of holding parts,
A hole provided between the pair of holding parts, penetrating the upper mold in a third direction orthogonal to the first direction and the second direction;
Press processing apparatus having. The upper mold includes a first portion including the working end;
And a second portion including the vibrating end integrally formed with the first portion,
8. The device according to claim 7, wherein the first portion and the second portion pass the center of mass of the upper mold and have the same mass across a flat first virtual surface orthogonal to the first direction. Press processing apparatus as described.   The press working apparatus according to claim 8, wherein the vibrator is provided such that a central axis of the vibrator passes through the center of mass of the upper mold.   The press working apparatus according to claim 7, wherein the vibrator mainly oscillates a vibration component that vibrates the upper mold in the first direction.