JP2010207907A - Pressing method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device which exhibit capacity matched to forming utilizing die division, and can securely perform pressing without increasing the forming capacity of the existent pressing device. <P>SOLUTION: In a die 2 and a punch 3, the punch 3 is composed of a displacing divided die 4 and a fixed divided die 5, the height of the die face 4a of the displacing divided die 4 is changed to the height of the die face 5a of the fixed divided die 5 so as to regulate press forming regions, a forming load required for the forming in each forming region is made lower, and the whole of the product is press-formed by one process. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a pressing method and apparatus for reducing a molding load during press working.

  In recent years, in order to reduce the weight of products, steel sheets for pressing have been increased in strength and the forming load has increased, so that press devices are also required to have increased forming ability. However, it is not easy to increase the forming capability of the existing press device, so a high-strength steel sheet may be formed using a smaller die than a normal die that forms the entire molded product at once. In the case of molding with a normal mold, it is inevitably necessary to perform molding with a press apparatus that does not exhibit the necessary molding ability.

  Therefore, if the forming capacity of the press machine is insufficient, the forming of high-strength steel sheets is limited to a specific production line, which is not preferable because the production line is limited. If the forming capacity of the press apparatus is excessive, inefficient production will occur. Become. In addition, if small parts are molded by diverting a large pressing device, it is necessary to increase the incidental facilities such as transporting equipment for small parts to put in and out materials and molded products, and the mold and pressurization part are dimensionally unmatched. There is a risk that the balance of the press apparatus itself may be lost.

  Even in the press working, the press apparatus may not be able to mold to the bottom dead center, the product shape cannot be precisely molded, the product dimensions are not stable, and variations due to molding conditions occur. Moreover, if it is going to secure desired precision, the mold correction which requires time for high-strength steel plates may have to be performed.

  In order to deal with such a problem, the present inventor has come up with a technique called mold division. Patent Document 1 below is a technique that approximates this mold division.

  In the following Patent Document 1, the slide of the press device is divided, and a single device has a plurality of small press devices. The small press devices are individually moved up and down to change the bottom dead center position, A press is disclosed.

Japanese Patent Laid-Open No. 5-008092 (see claim 1 and paragraph number “0015”, etc.)

  However, depending on the split state of the slide, the division of the mold is also limited, so it is difficult to set the optimum mold for the part (for example, setting the mold division position and number of divisions). Moreover, there is a problem that it is inferior in versatility because it must be processed according to the equipment. Moreover, in order to apply to the existing press apparatus, the slide needs to be modified, and the equipment cost becomes very high.

  The present invention has been made to solve the problems associated with the above-described prior art, and without losing the molding ability of the existing press apparatus, by performing mold division, it demonstrates the ability to match the molding, and reliably It is an object of the present invention to provide a pressing method and apparatus that can be pressed.

  The press device according to the present invention that achieves the above object comprises a split mold in which one of a pair of molds that are relatively close to and away from each other is formed by a split mold, and at least one of the split molds is a displacement split in which the distance between the mold surfaces changes. The other split mold is a fixed split mold in which the distance between the mold surfaces does not change, and an elastic ring member is provided outside the displacement split mold so as to apply a necessary molding load to the displacement split mold, and the displacement split mold Is supported by the elastic ring member by a support mechanism that moves in and out of the fixed split mold surface.

  In the pressing method according to the present invention for achieving the above object, one of a pair of relatively closely spaced molds is a divided mold divided into a plurality of parts, and at least one of the divided molds has another mold surface. This is a displacement split mold whose height changes with respect to the mold surface of the split mold, and press working is started with the displacement split mold protruding from the mold surface of the other split mold, and provided outside the displacement split mold. When the processing of the displacement split mold is completed in a state where a necessary molding load is applied by the elastic ring member formed, the mold surface of the displacement split mold is submerged from the mold surface of the other split mold, and the other split mold The press working is performed by the mold surface of the mold.

  According to the present invention, the blank material is partially pressed in a state where a part of the split mold is higher than the mold surface of the other split mold, and after the partial processing is completed, the remaining split mold is pressed. The blank material is formed for each predetermined region, and can be pressed by a forming load lower than the maximum forming load required when the whole is processed at once. As a result, it is possible to perform the press work exceeding the forming capability of the existing press apparatus in one step.

  In addition, each region can be molded to the bottom dead center in one step, so the product shape can be precisely molded, the product dimensions are stable, and there is no variation due to molding conditions. The reproducibility of the image is ensured, and even if there is a situation where the mold needs to be corrected, only the mold needs to be corrected.

  In particular, when reducing the maximum load required for forming (reducing the required maximum forming load), it is possible to cope with only the mold structure, so the optimum press design for each part or part (for example, the position and number of divisions of the mold) Etc.), and there are no restrictions on equipment or installation of special incidental equipment, and applicability or versatility is improved with existing presses.

  Furthermore, the elastic ring member can reliably transmit the displacement displacement of the displacement split type to the elastic ring member, and by using the elastic characteristics unique to the elastic ring member, press working with a predetermined molding load set by the product or the like can be performed. You can be sure.

It is sectional drawing of the press apparatus which concerns on Embodiment 1 of this invention. FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1. (A)-(C) are sectional drawings which show a press method in order of a process. FIG. 6 is a cross-sectional view of a main part showing Embodiment 2. It is principal part sectional drawing which shows Embodiment 3, (A)-(D) is a schematic sectional drawing which shows the movement state of the elastic ring member of Embodiment 3. FIG. It is a perspective view for demonstrating an elastic ring member.

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

<Embodiment 1>
As shown in FIG. 1, the press device 1 of the present embodiment includes an upper die (die) 2, a lower die (punch) 3, and a blank holder 4. The die 2 and the punch 3 have a size for forming a product in which the shape of the center part and both ends are different, for example, like a center pillar of an automobile, but the punch 3 has a circular shape at the center. The divided type is divided into two types: a divided type and a divided type arranged around the divided type.

  The central split mold is supported by the support mechanism 10 and is configured such that the height changes with respect to the peripheral split mold surface. Since the divided type is fixed in position, it will be referred to as a fixed divided type 5.

  The support mechanism 10 is provided on the lower surface of the displacement split mold 4 and causes the displacement split mold 4 to protrude from the mold surface 5a of the fixed split mold 5, and includes a first elastic member 11, a cam member 12, a backup member 13, and the like. The elastic ring member 15 and the second elastic member 16 are provided.

  First, the cam member 12 has a hollow cylindrical shape, and has a first cam surface C1, a second cam surface C2, and a third cam surface C3 having different inclination angles on the outer peripheral surface. One cam follower 17 abuts on these cam surfaces C1 to C3, and the cam follower 17 is orthogonal to the displacement direction (vertical direction) of the displacement split mold 4 whose height is changed by the press load from the die 2 by the cam surface C1. The movement displacement is restricted by the elastic ring member 13 as described later, and a predetermined press load is applied to the displacement split mold 4 as will be described later.

  As shown in FIG. 2, the cam member 12 of the present embodiment is surrounded by a fixed split mold 5, so that the cam member 12 is divided into four by a dividing line extending in the radial direction so that the takeout can be smoothly performed. Expansion and reduction movements are possible by a gap G formed therebetween. In the center hole 18 of the cam member 12, a backup member 13 is accommodated for restoring the original state after the cam member 12 is reduced. In order to further ensure the expansion / contraction movement of the cam member 12, a groove (not shown) extending in the radial direction is formed in the support block 14, and the protrusions and irregularities provided on the lower surface of the cam member 12 are formed. You may make it fit.

  The first elastic member 11 is made of a spring or rubber, and elastically urges the displacement split mold 4 upward via a support block 14 and a cam member 12 arranged in contact with the lower surface of the displacement split mold 4. The mold surface 4a of the displacement split mold 4 is projected from the mold surface 5a of the fixed split mold 5. The second elastic member 16 is also made of a spring or rubber, but the second elastic member 16 is for resiliently pushing each cam member 12 toward the backup member 13.

  The backup member 13 includes a cylindrical head portion 19 having an axis extending in the vertical direction, and a cylinder 20 that is a drive source for moving the head portion 19 in the vertical direction. A tapered surface 19a is formed for returning the cam members 12 which are close to each other and contracted to their original positions. The tapered surface 19a is formed so as to contact the tapered surface 12a formed at the lower part of the inner peripheral surface of the center hole 17 of the cam member 12, and the head 19 is moved upward by the cylinder 20 so that the four cam members 12 are moved. The elastic force of the second elastic member 16 is applied to the four cam members 12 by moving them collectively in the radially outward direction or by the downward movement of the head 19 so that the four cam members 12 are radially inward. It is designed to move.

  The elastic ring member 15 regulates the radial displacement of the cam follower 17 so that a required molding load is applied to the displacement split mold 4 and is a ring-shaped elastic body in which the cam follower 17 is in contact with the inner peripheral surface.

  The molding load acting on the displacement split mold 4 may require a large force of 700 to 1000 tons, for example, in a press machine for molding automobile parts, but the elastic ring member 15 has such a large force. Therefore, the radial displacement of the cam follower 17 is restricted and the molding load is applied to the displacement split mold 4. Therefore, the cam follower 17 is formed using a high-strength metal material, synthetic resin, or the like. It is designed to be used within the elastic limit that returns to its original state even when it is deformed. The metal material is preferably iron, titanium alloy or the like, but may be other metals. However, if the molding load is about several kilograms to several tens of tons, rubber or synthetic resin can be used.

  In FIG. 1, “21” is a blank holder, “W” is a blank material, “22” is a substrate, and “23” is a spacer block.

  Next, the press method of this embodiment is demonstrated in order of a process with reference to FIG. Here, the display of the blank material W is omitted.

(Preparation process)
First, as shown in FIG. 3A, the cylinder 20 of the backup member 13 is operated, the head 19 is raised, and the cam member 12 is expanded radially outward. As a result, the cam follower 17 comes into contact with the first cam surface C1 of the cam member 12.

  As a result, due to the elastic force of the first elastic member 11, the mold surface 4 a of the displacement split mold 4 protrudes from the mold surface 5 a of the fixed split mold 5 via the support block 14 and the cam member 12 (the amount of protrusion is “ Xmm ”).

  In addition, it is preferable that this protrusion amount (Xmm) is as small as possible. If the protrusion amount is large, it is easy to take a timing for shifting from machining by the displacement split mold 4 to machining by the fixed split mold 5, but there is a possibility that a step is generated at the boundary portion processed by the displacement split mold 4 and the fixed split mold 5. is there. This is because, when the protruding amount is small, the timing is difficult to take, but there is little possibility that a step is generated, and a product with good finish can be obtained.

(First pressure molding process)
Next, after the blank material W is set, when the die 2 starts to descend, the outer peripheral edge of the blank material W is held by the blank holder 21. And the center part of the blank material W provided between the displacement division | segmentation type | molds 4 is shape | molded with the predetermined shaping | molding load F which a press apparatus can exhibit. With this molding, the displacement split mold 4 also descends against the elastic force of the first elastic member 11. In other words, the displacement split mold 4 is pressed by the die 2 to perform molding while moving the cam follower 17 outwardly in the radial direction on the first cam surface C1 and descending itself.

  Here, the molding load F acting on the displacement split mold 4 is transmitted to the elastic ring member 15 via the cam member 12 and the cam follower 17, and the elastic ring member 15 expands outward. Deformation within limits. However, since the elastic ring member 15 regulates the radial displacement of the cam follower 17 by the rigidity it holds and causes the molding load to act on the displacement split mold 4, the predetermined molding load F acts on the blank material W.

  This molding is performed between the mold surface 4a of the displaced split mold 4 and the die 2 in a protruding state, and the blank material W is processed only partially, so that the blank material W is processed over the entire area. A molding load is not necessary, and even a press device that does not have the molding capability required for processing the blank material W as a whole can be molded. In other words, this molding can be performed within the range of the molding capability even if it is a press machine with insufficient molding capability, so that the product shape suitable for the molding conditions can be precisely molded and there is no variation. , Product shape reproducibility is ensured.

  When the displacement split mold 4 is lowered to a position where the protrusion amount (Xmm) is 0, the cam follower 17 comes into contact with the second cam surface C2 of the cam member 12, and the displacement split mold 4 is an elastic ring member. The holding force by 15 is lost, and the holding force is lowered at once, and the press working with the displacement division die 4 is completed. Further, by this lowering, the cam follower 17 is fitted into the recess between the second cam surface C2 and the third cam surface C3, the cam member 12 is fixed, and the lowered position of the displacement split mold 4 is maintained. Thereby, the 1st press molding process of the center part of the blank material W is completed.

(Second pressure molding process)
Further, when the die 2 is lowered, the molding load F acts on the mold surface 5a of the fixed split mold 5 as shown in FIG. 3B, and the remaining peripheral portion of the blank material W is fixed to the die 2. Pressure molding is performed with the split mold 5. Therefore, when the pressure forming by the fixed split mold 5 is completed, the pressure forming of the entire blank material W is completed in one step. This pressure molding is also performed within the range of the molding capability of the press device, as with the processing with the displacement split mold 4, and the product shape that meets the molding conditions can be precisely molded, and there is no variation. Reproducibility is ensured.

(Return process)
When the pressure forming of the entire blank material W is completed, the displacement split mold 4 is returned to its original state. However, since the cam follower 17 fixes the cam member 12, this return is first shown in FIG. As shown, the cylinder 20 of the backup member 13 is operated to move the head 19 downward.

  As a result, the tapered surface 19 a formed on the upper outer peripheral surface of the head portion 19 comes into contact with the tapered surface 12 a of the cam member 12, and the cam member 12 is radially inward by the elastic force of the first elastic member 11. In addition, it is moved upward by the elastic force of the second elastic member 16. Therefore, the displacement split mold 4 is pushed upward by the cam member 12 and returned to the original position protruding from the mold surface 5 a of the fixed split mold 5.

  Since the elastic ring member 15 is released from the radial outward force by the return of the cam member 12, the elastic ring member 15 is elastically deformed and returned inward, and the cam follower 17 also abuts on the first cam surface C1 of the cam member 12. become.

<Embodiment 2>
The above-described support mechanism 10 uses the backup member 13, the cam member 12, the cam follower 17, the first and second elastic members 11, 16, and the like to raise and lower the displacement division mold 4 in order to ensure the reliability of operation. However, in the second embodiment, the configuration is further simplified. FIG. 4 is a cross-sectional view of a main part showing Embodiment 2. Here, the display of the die 2 is omitted, and in FIGS. 4 and 5, the members shown in FIGS. The same reference numerals are given to the members, and description thereof will be omitted below.

  As shown in FIG. 4, the support mechanism 10 </ b> A according to the second embodiment rotates the screw shaft 30 screwed into the displacement division mold 4 and the screw shaft 30, thereby moving the displacement division mold 4 to the mold surface of the fixed division mold 5. 5a, and a drive source 31 such as a motor that moves up and down.

  An upper end portion of the screw shaft 30 is screwed into a screw hole 32 formed in the displacement split mold 4, and a lower end portion is connected to the drive source 31 through the substrate 22. However, although the displacement split mold 4 is held by the elastic ring member 15, it is displaced downward when a molding load is applied, so that the screw shaft 30 and the drive source 31 are preferably supported elastically.

  In the preparation process of this modification, as shown in FIG. 4, the displacement split mold 4 protrudes from the mold surface 5 a of the fixed split mold 5 only by operating the screw shaft 30 (the protrusion amount is indicated by “X mm”). ).

  Next, in the first pressure molding step, the displacement split mold 4 is directly held by the elastic ring member 15 during processing. Note that molding while descending is the same as in the above-described embodiment. The second pressure molding step is the same, but the height position of the displacement split mold 4 cannot be changed abruptly as in the above-described embodiment. However, since the height position of the displacement split mold 4 can be accurately controlled by the motor, there is substantially no problem. However, when more reliable conversion from the processing of the displacement split mold 4 to the processing of the fixed split mold 5 is preferable, the elastic ring member 15 in the third embodiment to be described later has a stepped portion 41 (shown by a one-dot chain line) as a spacer. You may form in the block 23. FIG. In this case, it is preferable to provide a cushion pin as the return means 42 as in the third embodiment described later.

  In the return step, the displacement split mold 4 can be returned to the original position only by reversing the drive source 31.

<Embodiment 3>
As shown in FIG. 5A, the support mechanism 10B according to the third embodiment directly holds the displacement split mold 4 by the elastic ring member 15 and a ball bearing in which the elastic ring member 15 is provided on the substrate 22. It is mounted on the friction reducing member 40 such as. As a result, the elastic ring member 15 is displaced (expanded and contracted) very smoothly.

  Further, the elastic ring member 15 according to the third embodiment is configured to fall on a step portion 41 formed on the outer peripheral edge portion of the substrate 22. When the elastic ring member 15 is expanded and displaced by the radially outward displacement of the cam follower 17, the height position of the displacement split mold 4 is suddenly changed in order to change from the processing of the displacement split mold 4 to the fixed split mold 5. Need to change. For this reason, a friction reducing member 40 such as a ball bearing is provided on the upper surface of the substrate 22 so that the elastic ring member 15 smoothly falls on the step portion 41. However, since the elastic ring member 15 dropped on the step portion 41 needs to be returned to the original position, the substrate 22 is provided with return means 42 such as a cushion pin.

  In the third embodiment, as shown in FIG. 5A, the state in which the displacement split mold 4 is placed on the elastic ring member 15 is in a state of protruding from the mold surface 5a of the fixed split mold 5. The preparation process as described above is unnecessary.

  Next, in the first pressure molding step, as shown in FIG. 5B, during the processing, the displacement split mold 4 is held by the elastic ring member 15 and molded while being lowered. Since the elastic ring member 15 is supported by the friction reducing member 40, it can be displaced (expanded) very smoothly.

  In the second pressure forming step, as shown in FIG. 5C, the elastic ring member 15 is smoothly dropped onto the stepped portion 41 due to the influence of the friction reducing member 40. The height position of the displacement division mold 4 changes.

  In the return step, as shown in FIG. 5D, the displacement split mold 4 can be lifted from the step portion 41 by the cushion pin 42 and returned to the original position.

  The embodiment described above has the following effects.

  -In the pressing method and apparatus of the present embodiment, the blank material is partially pressed in a state where the displacement split die is higher than the mold surface of the fixed split die, and after this processing is completed, the blank is pressed with the fixed split die. The material is formed for each predetermined region, and can be pressed with a forming load lower than a forming load required when the whole is processed at once. As a result, it is possible to perform the press work exceeding the forming capability of the existing press apparatus in one step.

  In addition, each region can be molded to the bottom dead center in one step, so the product shape can be precisely molded, the product dimensions are stable, and there is no variation due to molding conditions. The reproducibility of the image is ensured, and even if there is a situation where the mold needs to be corrected, only the mold needs to be corrected.

  In particular, when reducing the maximum load required for molding a product (reducing the required maximum molding load), it is possible to cope with only the mold structure, so the optimum press design for each part or part of the product (for example, dividing the mold) (Position, number of divisions, etc.) can be set, and there are no restrictions on equipment, so it can be applied to existing presses without the need for special incidental equipment, and versatility is also improved.

  -The support mechanism of the first embodiment is pushed by the cam surface in the radial direction perpendicular to the direction of the protrusion / displacement of the displacement division type at the lower part of the displacement division type and the cam surface formed on the outer peripheral surface. A cam follower, a first elastic member that repels the displacement split mold via the cam member so that the displacement split mold protrudes from the fixed split mold surface, and restricts radial displacement of the cam follower, If it is composed of an elastic ring member that applies a required molding load to the displacement split mold, the displacement of the displacement split mold can be reliably transmitted to the elastic ring member, and press working with a predetermined molding load set by the product etc. Can be sure.

  As in the support mechanism of the first embodiment, the cam member divided into a plurality of parts, the backup member provided at the central portion of the cam member, and the second that repels the cam members toward the backup member. If comprised from an elastic member and the drive source which moves the said backup member, it can return to an original state easily using a backup member after the displacement displacement of the said displacement division type.

  If the screw shaft and the drive source that rotates the screw shaft are configured as in the support mechanism of the second embodiment, the displacement of the displacement split type can be configured with a simple mechanism. It becomes easy to take the timing to switch to the processing by the fixed division type, and it is possible to perform press processing that is favorable in terms of accuracy and finish.

  As in the support mechanism of the third embodiment, when a cam surface is formed on the displacement split mold, and the radial displacement of the cam follower pushed by the cam surface is restricted by an elastic ring member, the existing press device has a very simple configuration. It is possible to perform press processing exceeding the molding capability of 1 in one process, the product shape can be precisely molded, the product dimensions are stable, the variation due to molding conditions does not occur, the reproducibility of the product shape is ensured, the mold This is also advantageous in terms of correction.

  In the support mechanism of the third embodiment, when a friction reducing member is provided on the substrate to support the elastic ring member and a step is formed on the outer peripheral edge of the substrate, and a cushion pin is provided on the step, the displacement division is performed. It is easy to switch from machining with a mold to machining with a fixed split mold, resulting in good press work in terms of precision and finish.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, the mold of the embodiment described above is a die and a punch that move relatively in the vertical direction, but is not limited to this, and any type of mold that moves relatively can be used. It may be. Therefore, the mold surface distance of the pair of molds only needs to be large and small in terms of making the height of the displacement split mold higher than that of the fixed split mold. Further, the mold can be divided not only by the central part and its periphery, but also by various division methods and the number of divisions.

<Example>
Examples of the elastic ring member 15 will be described below.

  As shown in FIG. 6, the size of each part of the elastic ring member 15 was set, the forming load F was 800 tons, the inclination angle was 45 degrees on the first cam surface, and the elastic ring member 15 was formed from a titanium alloy.

In this elastic ring member 15,
The inner diameter R is 200 mm, the height L is 50 mm, the circumferential stress σ2 is 63.7 N / mm, the plate thickness t is about 27 mm, and the yield stress is 920 N / mm.

  The present invention makes it possible to perform a press that exhibits the ability to match molding by utilizing mold division without increasing the molding capability of an existing press apparatus.

2 ... Die (upper mold),
3 ... Punch (lower mold),
4. Displacement division type,
4a: Displacement division type mold surface,
5 ... Fixed split type,
5a: Fixed split mold surface,
10, 10A, 10B ... support mechanism,
11 ... 1st elastic member,
12 ... cam member,
12a ... taper surface,
13 ... Backup member,
15 ... an elastic ring member,
16 ... 2nd elastic member,
17 ... Cam follower,
18 ... Center hole,
19 ... head,
19a ... taper surface,
20 ... Cylinder (drive source),
30 ... Screw shaft,
31 ... motor (drive source),
40: Friction reducing member,
41 ... Step,
42 ... cushion pin (return means),
C1, C2, C3 ... cam surfaces.

Claims (7)

A press apparatus configured by a split mold in which one of a pair of molds that are relatively close to each other is divided into a plurality of parts,
The split mold is a displacement split mold in which at least one of the pair of molds is a displacement split mold in which the distance between the mold faces changes with respect to the other mold, and the other split mold is a fixed split mold in which the distance between the mold faces with respect to the other mold does not change. As
On the outside of the displacement split mold, an elastic ring member is provided so that a required molding load is applied to the displacement split mold.
The press apparatus characterized in that the displacement split mold is supported by the elastic ring member by a support mechanism that moves up and down from the mold surface of the fixed split mold. The support mechanism is
A cam member that is disposed so as to abut on the opposite side of the displacement split type and has a cam surface formed on an outer peripheral surface;
A cam follower that is pushed by the cam surface in a radial direction orthogonal to the direction in which the displacement of the displacement type is displaced;
A first elastic member that repels the displacement split mold via the cam member so that the displacement split mold protrudes from the mold surface of the fixed split mold;
Have
The press device according to claim 1, wherein the elastic ring member regulates a radial displacement of the cam follower so that a necessary forming load is applied to the displacement split mold. The support mechanism is
The cam member that is divided and arranged in a plurality so as to expand and contract in a radial direction perpendicular to the direction of the displacement of the displacement type;
A columnar backup member provided at a central portion of the cam member, having an axis extending in the direction of the protrusion and displacement of the displacement split type and having a cam surface corresponding to the cam surface;
A second elastic member that repels each cam member toward the backup member;
A drive source for moving the backup member in the axial direction;
The press apparatus according to claim 2, comprising: The support mechanism is
A cam surface formed on the outer peripheral surface of the displacement-dividing mold on the side opposite to the mold surface;
A cam follower that is pushed by the cam surface in a radial direction orthogonal to the direction in which the displacement of the displacement type is displaced;
Have
The press device according to claim 1, wherein the elastic ring member regulates a radial displacement of the cam follower so that a necessary forming load is applied to the displacement split mold. The support mechanism is
A cam surface is formed on the outer peripheral surface on the opposite side of the mold surface, and the elastic ring member is placed so as to restrict a radial displacement of a cam follower pushed by the cam surface and to apply a necessary molding load to the displacement split mold. A substrate to be
A friction reducing member provided on the substrate and in contact with the elastic ring member;
A step formed on the outer peripheral edge of the substrate, and formed so that the elastic ring member falls due to a radially outward displacement of the cam follower;
A cushion pin provided on the stepped portion, and returning the dropped elastic ring member to its original position;
The press apparatus according to claim 1, comprising: The support mechanism is
A screw shaft that is screwed into the displacement split mold, a drive source that rotates the screw shaft and causes the displacement split mold to protrude from the mold surface of the other split mold;
The press apparatus according to claim 2, comprising:   One of the pair of molds that are relatively close to and away from each other is constituted by a divided mold divided into a plurality of parts, and at least one of the divided molds has a mold surface higher than the mold surface of the other divided mold. It is a displacement split mold with variable length, and pressing is started with the displacement split mold protruding from the mold surface of the other split mold, and the required molding is performed by the elastic ring member provided outside the displacement split mold When the processing of the displacement split mold is completed in a state where a load is applied, the mold surface of the displacement split mold is submerged from the mold surface of the other split mold, and press processing is performed with the mold surface of the other split mold. The press method characterized by the above-mentioned.

Images