JP6901772B2 - Press equipment - Google Patents

Description

The present invention relates to a press device for drawing a metal plate.

As a press device for drawing a metal plate, a press device is known in which a metal plate is pre-drawn to form an intermediate molded body, and then the intermediate molded body is subjected to compression drawing to form a molded body. (See, for example, Patent Document 1). In this press device, a pre-drawing punch and a pre-drawing die are arranged in a pre-drawing area for forming an intermediate molded body, and a compression drawing punch and a compression drawing die are arranged in a compression drawing area for performing compression drawing. A die for compression drawing is arranged, and a compression / pressurizing means is provided in connection with the punch for compression / drawing. It consists of a hydraulic cylinder mechanism for adding.

In the front drawing area, the front drawing die is reciprocated in the vertical direction with respect to the front drawing punch, and this reciprocating movement causes the front drawing punch and the front drawing die to act on the metal plate to act on the metal plate to form the top wall. And a preformed body having a peripheral side wall is formed. Further, in the compression drawing processing area, the compression drawing die is reciprocated in the vertical direction with respect to the compression drawing punch, and the reciprocating movement causes the compression drawing punch and the compression drawing die to act on the preformed body. For example, a molded body having a top wall, a peripheral side wall, and a flange portion is formed. At this time, the compressive force from the fluid pressure cylinder mechanism of the compression / pressurizing means acts on the peripheral side wall of the intermediate molded body via the compression / pressurizing plate, and the peripheral side wall of the intermediate molded body is compressed and pressurized by this compressive force. As a result, it is possible to prevent the thickness of the peripheral side wall from becoming thin during the compression drawing process.

Japanese Patent No. 56977787

However, this press device has the following problems. That is, since the fluid pressure cylinder mechanism of the compression / pressurization means is arranged under the compression / pressurization plate, the fluid pressure cylinder mechanism is arranged under the lower die set to which the compression drawing punch is attached. Then, it is necessary to project the output part of this fluid pressure cylinder mechanism upward through the lower die set, and attach a compression pressure plate to this output part. Therefore, it is necessary to provide an arrangement space for arranging the fluid pressure cylinder mechanism under the lower die set, and it is necessary to provide a through hole for the output part of the fluid pressure cylinder mechanism in the lower die set. There is a problem that the size of the lower die set becomes large and the configuration related to the lower die set becomes complicated.

Further, if such a compression / pressurizing means is added to a normal press device (or an existing press device) to improve the compression drawing process, the fluid pressure is applied to the lower side of the lower die set of the press device body. There is no arrangement space for the cylinder mechanism, and therefore there is a problem that it is very difficult to incorporate and apply the compression / pressurizing means to the press device main body of a normal press device (or an existing press device).

An object of the present invention is to provide a press device capable of performing compression drawing after pre-drawing and easily applying a compression / pressurizing means for performing compression drawing to an existing press main body. To provide.

The press device according to claim 1 of the present invention includes a lower die set attached to the press device main body and an upper die set supported by the press device main body so as to reciprocate in the vertical direction with respect to the lower die set. A pre-drawing area and a compression drawing area are provided between the lower die set and the upper die set along a predetermined transfer direction, and the metal plate is provided with the pre-drawing area and the compression drawing area. A press device that forms a molded body having a top wall, a peripheral side wall extending downward from the outer peripheral portion of the top wall, and a flange portion extending radially outward from the lower end portion of the peripheral wall surface while being transferred through the region. hand,
A punch for front drawing is attached to the lower die set corresponding to the front drawing area, a die for front drawing is attached to the upper die set, and a die for compression drawing is attached to the upper die set. A punch for compression drawing is attached to the lower die set, a die for compression drawing is attached to the upper die set, and a compression / pressurizing means is provided in connection with the punch for compression drawing. The compression / pressurization means includes a compression / pressurization plate through which the compression drawing punch is inserted and acts on the flange portion of the molded body , a pressurization link connected to the compression / pressurization plate, and the pressurization link. It is characterized in that it is provided with a fluid pressure cylinder mechanism for applying a compressive force to the compression pressurizing plate via the above.

Further, in the press device according to claim 2 of the present invention, the pressurizing link of the compression / pressurizing means is swingably attached to the press device main body or the lower die set, and the fluid pressure cylinder mechanism. The cylinder body is arranged outside the press device body, one end of the pressurizing link is rotatably connected to the compression pressurizing plate, and the other end is rotatably connected to the output portion of the fluid pressure cylinder mechanism. It is characterized in that it is connected to.

Further, in the press device according to claim 3 of the present invention, the fluid pressure for controlling the fluid pressure supplied to the fluid pressure cylinder mechanism in relation to the fluid pressure cylinder mechanism of the compression / pressurizing means. A control means is provided, and the fluid pressure control means gradually increases the fluid pressure supplied to the fluid pressure cylinder mechanism when the upper die set moves downward toward the bottom dead point. Thus, the compression load applied to the compression pressurization plate by the fluid pressure cylinder mechanism is characterized in that it is gradually increased toward the bottom dead point.

Further, in the press device according to claim 4 of the present invention, two or more compression drawing processing areas are provided along the predetermined transfer direction, and corresponds to the first compression drawing processing area on the upstream side. A punch for the first compression drawing is attached to the lower die set, and a die for the first compression drawing is attached to the upper die set, which corresponds to the second compression drawing processing area on the downstream side. A second compression drawing punch is attached to the lower die set, a second compression drawing die is attached to the upper die set, and the first and second compression drawing punches are further attached. The first and second compression and pressurizing means are provided in connection with this, and the compression load applied to the second compression and pressurization plate by the second fluid pressure cylinder mechanism of the second compression and pressurization means is the first compression and pressurization. It is characterized in that it is larger than the compression load applied to the first compression plate by the first cylinder mechanism of the compression means.

Further, in the press device according to claim 5 of the present invention, the action start timing of the compression load applied to the second compression / pressurization plate by the second fluid pressure cylinder mechanism of the second compression / pressurization means is set. The second compression is performed earlier than the action start timing of the compression load applied to the first compression / pressurization plate by the first fluid pressure cylinder mechanism of the first compression / pressurization means, and by the second fluid pressure cylinder mechanism. The end timing of the action of the compressive load applied to the pressure plate is later than the end timing of the action of the compressive load applied to the first compression pressure plate by the first fluid pressure cylinder mechanism.

According to the press device according to claim 1 of the present invention, a front drawing punch is attached to the lower die set, a front drawing die is attached to the upper die set, and the front drawing die is attached to the upper die set. A punch for compression drawing is attached to the lower die set and a die for compression drawing is attached to the upper die set corresponding to the compression drawing area, so the upper die set reciprocates with respect to the lower die set. When moved, in the pre-drawing area, the metal plate can be pre-drawn by the pre-drawing punch and the pre-drawing die to form an intermediate molded body, and in the compression drawing area, compression is performed. The intermediate molded body can be subjected to compression drawing by the drawing punch and the compression drawing die to form the molded body.

Further, the compression / pressurizing means provided in connection with the compression drawing punch includes a compression / pressurization plate that acts on the flange portion of the molded body, a pressurization link connected to the compression / pressurization plate, and a pressurization link. Since it is equipped with a fluid pressure cylinder mechanism for applying a compressive force to the compression and pressure plate via the pressurizing force, the output from the fluid pressure cylinder mechanism is transmitted to the compression and pressure plate via the pressurizing link during compression processing. By this compression pressure plate, a compressive force can be applied to the peripheral side wall of the intermediate molded body to prevent the peripheral side wall from becoming thin. Further, since the fluid pressure cylinder mechanism and the compression / pressurization plate are connected via a pressurization link, the fluid pressure cylinder mechanism can be arranged outside the press device main body, whereby the compression / pressurization means can be used. The mounting structure is simplified, and it can be applied to, for example, an existing press device main body.

Further, according to the press device according to claim 2 of the present invention, the pressurizing link of the compression / pressurizing means is swingably attached to the press device body (or the lower die set), and the cylinder of the fluid pressure cylinder mechanism thereof. Since the main body is arranged outside the main body of the press device, the compression / pressurizing means can be easily attached, and the main body can be easily applied to the existing main body of the press device.

Further, according to the press device according to claim 3 of the present invention, a fluid pressure control means for controlling the fluid pressure is provided in connection with the fluid pressure cylinder mechanism of the compression / pressurization means, and the fluid pressure control means. Controls the fluid pressure sent to the fluid pressure cylinder mechanism to increase stepwise as the upper die set moves downward toward the lower dead point, so that near the lower dead point of the upper die set, The compressive force applied to the peripheral side wall of the intermediate molded body is also increased, and thus it is possible to effectively suppress the thinning of the peripheral side wall thickness.

Further, according to the press device according to claim 4 of the present invention, the lower die set has a punch for the first compression drawing, and the upper die set has a punch for the first compression drawing, corresponding to the first compression drawing processing area on the upstream side. A first compression drawing die is attached, and a second compression drawing punch is attached to the lower die set and a second compression drawing die is attached to the upper die set corresponding to the second compression drawing processing area on the downstream side. It is attached and is further provided with first and second compression and pressurization means in connection with the first and second compression drawing punches. Then, the compressive load applied to the second compression / pressurizing plate by the second fluid pressure cylinder mechanism of the second compression / pressurizing means is applied to the first compression plate by the first cylinder mechanism of the first compression / pressurization means. Since it is configured to be larger than the compressive load , the more deeply the intermediate molded body is processed, the greater the compressive force applied to its peripheral side wall, and as a result, the intermediate molding is performed during this compression drawing process. It is possible to more effectively prevent the wall thickness of the peripheral side wall of the body from becoming thin.

Further, according to the press device according to claim 5 of the present invention, the action start timing of the compression load applied to the second compression / pressurization plate by the second fluid pressure cylinder mechanism of the second compression / pressurization means is the first. It is configured so as to be earlier than the action start timing of the compressive load applied to the first compression / pressurization plate by the first fluid pressure cylinder mechanism of the first compression / pressurization means, and the second compression is applied by the second fluid pressure cylinder mechanism. Since the end timing of the action of the compressive load applied to the pressure plate is configured to be later than the end timing of the action of the compressive load applied to the first compression pressure plate by the first fluid pressure cylinder mechanism, the first In the 1st and 2nd compression drawing regions, the intermediate molded body can be subjected to compression drawing as required.

The schematic which shows the main part of one Embodiment of the press apparatus which follows this invention simply. FIG. 5 is a plan view showing a lower die set of the press device of FIG. 1 and a configuration related thereto. FIG. 1 is a cross-sectional view taken along the line III-III. It is explanatory drawing for demonstrating the processing of the pre-drawing area and the compression drawing area of the press apparatus of FIG. FIG. 3 is a diagram showing a relationship between an example of a change in a compression load (hydraulic load) applied by a compression / pressurizing means in the first to third compression drawing processing regions of the press device of FIG. 1 and a rotation angle of the press device. It is a figure which shows the relationship between the rotation angle of a press apparatus, and another example of the change of the compression load (hydraulic load) applied by the compression pressurizing means in the 1st to 3rd compression drawing processing regions. FIG. 3 is a cross-sectional view corresponding to FIG. 3, showing another form of the compression / pressurizing means. The schematic which simplifies the main part of the other embodiment of the press apparatus according to this invention.

Hereinafter, an embodiment of a press device according to the present invention will be described with reference to the accompanying drawings. In FIGS. 1 to 3, the illustrated press device includes a lower die set 4 attached to the lower portion of the press device main body 2 and an upper die set 6 disposed above the lower die set 4. The die set 6 is attached to the upper slide 8, and the upper slide 8 is supported by the press device main body so as to be movable in the vertical direction. For example, by rotating the crank mechanism (not shown) in a predetermined direction, the upper slide 8 and the upper die The set 6 is reciprocated in the vertical direction.

In this embodiment, between the lower die set 4 and the upper die set 6, the pre-drawing area 10 and the three compression drawing areas, that is, the first to third compression drawing areas 12, 14, 16 are metal plates. 18 (and the intermediate molded body 20) are arranged in this order along the transfer direction. In the pre-drawing area 10, the metal plate 18 is pre-drawn, and in the first to third compression drawing areas 12, 14 and 16, the intermediate molded bodies 20 (20a, 20b, 20c) is subjected to compression drawing.

More specifically, the front drawing punch 22 and the front drawing die 24 are provided corresponding to the front drawing processing area 10, the front drawing punch 22 is attached to the lower die set 4, and the front drawing die 24 is attached to the upper die set 6. The front drawing punch 22 has a cylindrical shape, and the front drawing die 24 has a hollow cylindrical shape having an internal space 26. The tip of the front drawing punch 22 is inserted into the internal space 26 of the front drawing die 24. Will be done.

The configurations related to the first to third compression drawing regions 12 (14, 16) are substantially the same, and hereinafter, the first compression drawing region 12 (second compression drawing region 14, third compression drawing region) The configuration related to 16) will be described. Punch 28 for first compression drawing (punch 30 for second compression drawing, punch for third compression drawing) corresponding to the first compression drawing area 12 (second compression drawing area 14, third compression drawing area 16) 32) and the first compression drawing die 34 (second compression drawing die 36, third compression drawing die 38) are arranged, and the first compression drawing punch 28 (second compression drawing punch 30, third compression drawing die 38) is arranged. The compression drawing punch 32) is attached to the lower die set 4, and the first compression drawing die 34 (second compression drawing die 36, third compression drawing die 38) is attached to the upper die set 6.

The first compression drawing punch 28 (second compression drawing punch 30, third compression drawing punch 32) has a cylindrical shape like the front drawing punch 22, and the first compression drawing die 34 (second compression). The drawing die 36 and the third compression drawing die 38) have a hollow cylindrical shape having a first internal space 40 (second internal space 42, second internal space 44), similarly to the front drawing die 24. The tip of the first compression drawing punch 28 (second compression drawing punch 30, third compression drawing punch 32) is inserted into the first internal space 40 (second internal space 42, third internal space 44). Will be done.

In this press device, first to third compression and pressurizing means 46, 48, 50 are provided in relation to each of the first to third compression drawing punches 30, 32, and 34. The first to third compression and pressurization means 46, 48, 50 have substantially the same configuration, and the first compression and pressurization means 46 (second compression and pressurization means 48, third compression and pressurization means 50) will be described below. To do. The first compression / pressurization means 46 (second compression / pressurization means 48, third compression / pressurization means 50) is a first compression / pressurization plate 52 (second compression / pressurization plate 54, which acts on the intermediate molded body 20). A first pressurizing link 58 (third) for transmitting a compressive force to the third compression pressurization plate 56) and the first compression pressurization plate 52 (second compression pressurization plate 54, third compression pressurization plate 56). 2 Pressurizing link 60, 3rd pressurizing link 62) and a first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) for applying a compressive force are provided. There is. A circular opening is provided in the substantially central portion of the first compression pressure plate 52 (second compression pressure plate 54, third compression pressure plate 56), and the first compression drawing punch 28 (second compression drawing). The tip side of the punch 30 and the punch 32 for the third compression drawing protrudes upward through the opening of the first compression pressure plate 52 (second compression pressure plate 54, third compression pressure plate 56). .. The first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) is composed of, for example, a hydraulic cylinder mechanism, a pneumatic cylinder mechanism, and the like.

In this embodiment, as shown in FIGS. 2 and 3, a pair of the first compression drawing area 12 (corresponding to the second compression drawing area 12 and the third compression drawing area 14) on the side portion of the lower die 4. The first pressurizing link 58 (second pressurizing link 60, third pressurizing link 62) swings around the support shaft 72 (see FIG. 3) between the pair of mounting brackets 70. It is movably mounted. One end side of the first pressurizing link 58 (second pressurizing link 60, third pressurizing link 62) is a first compression pressurizing plate 52 (second compression pressurizing plate 54, second pressurizing link 62). One end portion 58a (60a, 62a) extending toward the three compression / pressurizing plate 56) and divided into two thereof extends through the connecting shaft 74 (see FIG. 3) and the first compression / pressurizing plate 52 (second compression pressurizing). It is rotatably connected to the pressure plate 54 and the third compression pressure plate 56), and the other end side of the first pressure link 58 (second pressure link 60 and third pressure link 62). Extends toward the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68), and the other end is the first fluid pressure cylinder via the connecting shaft 76 (see FIG. 3). It is rotatably connected to the output unit 78 of the mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68). The first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, The cylinder body 80 of the third fluid pressure cylinder mechanism 68) is attached to a mounting member 82 mounted so as to be fixed to the outside of the press device body 2 (for example, the outer surface of the press device body 2). A cylinder support device (not shown) is provided so as to be attached to the main body 2, and a first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) is attached to this cylinder support member. It may be.

Since it is configured in this way, the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) is extended to extend the first pressurizing link 58 (second pressurizing link 60). , The third pressurizing link 62) is rotated clockwise in FIG. 3 about the support shaft 72, and the first compression pressurizing plate 52 (second compressive pressurizing plate 54, third) connected to the support shaft 72). The compression / pressurization plate 56) is lifted upward, whereby the intermediate molded body 20 supported by the first compression / pressurization plate 52 (second compression / pressurization plate 54, third compression / pressurization plate 56). A compressive force acts on (20a, 20b, 20c) as described later.

The first to third fluid pressure cylinder mechanisms 64, 66, 68 of the first to third compression and pressurizing means 46, 48, 50 are controlled by the fluid pressure control system represented by the number 84. The fluid pressure control system 84 includes a fluid pressure source 86 such as a hydraulic pump, and the pressure fluid from the fluid pressure source 86 is supplied through the supply flow path 88. The first to third branch feeding channels 90, 92, 94 are connected to the supply flow path 88, and the first to third branch feeding channels 90, 92, 94 are the first to third fluid pressures. It is connected to the extension side of the cylinder body 80 of the cylinder mechanisms 64, 66, 68. Further, first to third fluid supply pressure control means 96, 98, 100 for controlling pressure fluid supply and fluid pressure are arranged in the first to third branch supply flow paths 90, 92, 94. ing. The first fluid supply pressure control means 96 (second and third fluid supply pressure control means 98, 100) is, for example, the first branch feed flow path 90 (second and third branch feed flow paths 92, 94). It is fed through an on-off valve (not shown) for supplying and stopping the supply and stop of the pressure fluid supplied through the first branch supply flow path 90 (second and third branch supply flow paths 92 and 94). A fluid pressure control valve (not shown) for controlling the pressure of the fluid is included.

The operations of the first to third fluid supply pressure control means 96, 98, 100 are controlled by using the machining control signal from the press control device 102 of the press device, and the machining control signal from the press control device 102 supplies the fluid. It is supplied to the pressure control device 104, and the fluid supply pressure control device 104 generates the first to third fluid supply signals and the first to third fluid pressure control signals based on the machining signal.

For example, the first fluid supply signal (second fluid supply signal, third fluid supply signal) generated by the fluid supply pressure control device 104 is the first fluid supply pressure control means 96 (second fluid supply pressure control means 98). , The on-off valve (not shown) of the third fluid supply pressure control means 100) is supplied, and the on-off valve is opened based on the first fluid supply signal (second fluid supply signal, third fluid supply signal). Then, the pressure fluid from the supply flow path 88 passes through the first branch supply flow path 92 (second branch supply flow path 94, third branch supply flow path 96) to the first fluid pressure cylinder mechanism 64 (second fluid). The pressure cylinder mechanism 66 and the third fluid pressure cylinder mechanism 68) are fed to the extension side of the cylinder body 80.

Further, the first fluid pressure control signal (second fluid pressure control signal, third fluid pressure control signal) generated by the fluid supply pressure control device 104 is the first fluid supply pressure control means 96 (second fluid supply pressure). It is sent to the fluid pressure control valve (not shown) of the control means 98 and the third fluid supply pressure control means 100), and the first fluid pressure control signal (second fluid pressure control signal, third fluid pressure control signal). The pressure of the pressure fluid fed through the first branch feed flow path 92 (second branch feed flow path 94, third branch feed flow path 96) is controlled based on the above.

The press working by this press device (that is, pre-drawing and compression drawing) is performed as follows. With reference to FIG. 4, the press working by this press device is performed using the circular metal plate 18 shown in FIG. 4A as a material, and the metal plate 18 includes, for example, a cold-rolled steel plate or stainless steel. A steel plate, a plated steel plate, or the like can be used.

Then, while the metal plate 18 is transferred through the pre-drawing area 10 and the first to third compression drawing areas 12, 14, 14, the pre-drawing and the first to third compression drawing processes are performed, and finally. The molded body 21 shown in FIG. 4 (e) is formed. The final molded body 21 extends radially outward from the circular top wall 112, the cylindrical peripheral side wall 114 extending downward from the outer peripheral portion of the top wall 112, and the lower end portion of the peripheral side wall 114. It is in the form of having an annular flange portion 116.

Further explaining with reference to FIGS. 1 and 4, in the front drawing processing area 10, the front drawing punch 22 of the lower die set 4 is formed by the metal plate 18 due to the reciprocating movement of the upper die set 6 with respect to the lower die set 4. The front drawing die 24 of the upper die set 6 acts on the lower surface (inner side surface), and the front drawing die 24 of the upper die set 6 acts on the upper surface (outer surface) of the metal plate 18, and the front drawing process is performed by the front drawing punch 22 and the front drawing die 24. The intermediate molded body 20a shown in (a) is formed. The intermediate molded body 20a formed in the pre-drawing region 10 is formed in a form having a top wall 120a and a peripheral side wall 122a extending downward from the outer peripheral portion of the top wall 120a. The intermediate molded body 20a formed in the pre-drawing region 10 is formed so as to have a top wall 120a, a peripheral side wall 122a, and an annular flange portion extending radially outward from the lower end portion of the peripheral side wall. It may be.

In the first to third compression drawing processing regions 12, 14 and 16, the intermediate molded bodies 20a, 20b and 20c are similarly subjected to compression drawing processing. That is, in the first compression drawing processing area 12 (second compression processing area 14, third compression drawing processing area 16), the first compression of the lower die set 4 is caused by the reciprocating movement of the upper die set 6 with respect to the lower die set 4. The drawing punch 28 (second compression drawing punch 30, third compression drawing punch 32) acts on the inner surface side of the intermediate molded body 20a (20b, 20c), and the first compression drawing die of the upper die set 6 34 (second compression drawing die 36, third compression drawing die 38) acts on the outer surface side of the intermediate molded body 20a (20b, 20c), and the first compression drawing punch 28 (second compression drawing punch 30). , Third compression drawing punch 32) and first compression drawing die 34 (second compression drawing die 36, third compression drawing die 38) by compression drawing, the intermediate molded body shown in FIG. 4 (c). 20b (intermediate molded body 20c shown in FIG. 4D, molded body 21 shown in FIG. 4E) is formed. The intermediate molded body 20b (intermediate molded body 20c, molded body 21) formed in the pre-drawing region 10 has a top wall 120b (120c, 112) and is downward from the outer peripheral portion of the top wall 120b (120c, 112). A form having a peripheral side wall 122b (122c, 114) extending in the radial direction and an annular flange portion 124b (124c, 116) extending radially outward from the lower end portion of the peripheral side wall 122b (122c, 114) is formed.

Then, in the first compression drawing (second compression drawing, third compression drawing) in the first compression drawing area 12 (second compression drawing area 14, third compression drawing area 16), the first The compression / pressurization means 46 (second compression / pressurization means 48, third compression / pressurization means 50) applies a required compressive force to the peripheral side walls 122a (122b, 122c) of the intermediate molded body 20a (20b, 20c). ..

In this press device, the press control device 102 (FIG. 3) generates a machining control signal in synchronization with the rotation angle of the crank shaft (not shown) of the press device, and the fluid supply pressure control device is based on this machining control signal. 104 (FIG. 3) generates a first fluid supply signal (second fluid supply signal, third fluid supply signal) and a first fluid pressure control signal (second fluid pressure control signal, third fluid pressure control signal). Then, based on the first fluid supply signal (second fluid supply signal, third fluid supply signal), the first fluid supply pressure control means 96 (second fluid supply pressure control means 98, third fluid supply pressure control means). The on-off valve (not shown) of 100) is controlled to open and close, and the first fluid supply pressure control means 96 is based on the first fluid pressure control signal (second fluid pressure control signal, third fluid pressure control signal). The fluid pressure control valve (not shown) (which constitutes the fluid pressure control means) of (second fluid supply pressure control means 98, third fluid supply pressure control means 100) is controlled to control the first branch supply flow path 92. Pressure supplied to the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) through (second branch feed flow path 94, third branch feed flow path 96). The pressure of the fluid is controlled, and the fluid pressure (for example, as shown in FIG. 5) is on the extension side of the cylinder body 80 of the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68). , Hydraulic load) is applied.

To the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism 66, third fluid pressure cylinder mechanism 68) of the first compression and pressurization means 46 (second compression and pressurization means 48, third compression and pressurization means 50) When a pressure fluid having a fluid pressure load as shown in FIG. 5 is supplied, the first compression pressurizing plate 52 is passed through the first pressurizing link 58 (second pressurizing link 60, third pressurizing link 62). (2nd compression pressure plate 54, 3rd compression pressure plate 56) is lifted upward toward the 1st compression drawing die 34 (2nd compression drawing die 36, 3rd compression drawing die 38). As a result, during the first compression drawing processing (second compression drawing processing, third compression drawing processing), the first compression pressure plate 52 (second compression pressure plate 54, third compression pressure plate 56) becomes It acts on the peripheral side wall 122a of the intermediate molded body 20a (the peripheral side wall 122b via the flange portion 124b of the intermediate molded body 20b and the peripheral side wall 122c via the flange portion 124c of the intermediate molded body 20c), and thus is intermediate. A compressive force is applied to the peripheral side walls 122a (122b, 122c) of the molded body 20a (20b, 20c).

According to the first compression drawing punch 28 (second compression drawing punch 30, third compression drawing punch 32) and the first compression drawing die 34 (second compression drawing die 36, third compression drawing die 38). In the drawing process, the wall thickness of the peripheral side wall 122a (122b, 122c) of the intermediate molded body 20a (20b, 20c) becomes thin, but during this processing, a compressive force is applied to the peripheral side wall 122a (122b, 122c). By doing so, this compressive force acts to increase the thickness of the peripheral side wall 122a (122b, 122c), and as a result, the peripheral side wall 122a (122b, 122c) of the intermediate molded body 20a (20b, 20c) becomes thin. It is possible to increase the wall thickness (so-called thickening) depending on the processing conditions.

In such press working, pre-drawing is performed, and then the first to third compression drawing is performed in this order. In such a case, the more downstream the drawing is, the more the molded body 20a (20b, 20c, 20b, 20c, The top wall 120a (120b, 120c, 112) of 21) is formed so that the size (outer diameter) is small and the peripheral side wall 122a (122b, 122c, 114) is long.

In the first to third compression drawing in such drawing, as shown in FIG. 5, the pressure fluid is supplied to the third fluid pressure cylinder mechanism 68 of the third compression and pressurizing means 50 at the earliest. Then, the pressure fluid is supplied to the second fluid pressure cylinder mechanism 66 of the second compression / pressurizing means 48, and then the pressure fluid is supplied to the first fluid pressure cylinder mechanism 64 of the first compression / pressurizing means 46. By controlling the supply of the pressure fluid in this way, the second compression / pressurization means 48 is more than the timing at which the action of the compression load by the first compression / pressurization means 46 (that is, the first compression / pressurization plate 52) starts. (That is, the action start timing of the compression load by the second compression pressure plate 54) is earlier than the action start timing of the compression load by the second compression pressure means 48, and the third compression pressure means 50 (that is, the third compression pressure means 50) 3 The timing of starting the action of the compression load by the compression pressure plate 56) is earlier.

Further, in the supply stop of the pressure fluid, contrary to the supply start, the supply of the pressure fluid to the first fluid pressure cylinder mechanism 64 of the first compression / pressurizing means 46 is stopped earliest, and then the second compression is performed. The supply of pressure fluid to the second fluid pressure cylinder mechanism 66 of the pressurizing means 48 is stopped, and then the supply of pressure fluid to the third fluid pressure cylinder mechanism 68 of the third compression pressurizing means 50 is stopped. By controlling the supply stop of the pressure fluid in this way, the second compression / pressurization means 48 (that is, that is, the second compression / pressurization means 48 (that is, the first compression / pressurization plate 52) is more than the end timing of the action of the compression load. , The end timing of the action of the compression load by the second compression / pressurizing plate 54) is delayed, and the third compression / pressurization means 50 (that is, the third compression / pressurization means 50) is delayed from the end timing of the action of the compression load by the second compression / pressurization means 48. The end timing of the action of the compressive load by the pressure plate 56) is delayed.

By controlling the action start timing and action end timing of the compressive load by the first to third compression and pressurizing means 46, 48, 50 in this way, it is intermediate in the first to third compression drawing processing areas 12, 14 and 16. The molded bodies 20a, 20b, 20c can be subjected to the first to third compression drawing by applying a compressive load as required, whereby the wall thickness of the peripheral side walls 122a, 122b, 122c is reduced. It can be effectively suppressed.

Further, in the first to third compression drawing in such drawing, as shown in FIG. 5, the pressure of the pressure fluid supplied to the third fluid pressure cylinder mechanism 68 of the third compression and pressurizing means 50. Is the largest, and the pressure of the pressure fluid supplied to the second fluid pressure cylinder mechanism 66 of the second compression / pressurizing means 48 is the next largest, and is sent to the first fluid pressure cylinder mechanism 64 of the first compression / pressurizing means 46. The pressure of the applied pressure fluid is controlled to be the smallest. By controlling the pressure of the pressure fluid in this way, the compressive load applied to the intermediate molded body 20c by the third compression / pressurizing means 50 (that is, the third compression / pressurizing plate 56) is the largest, and the second compression is applied. The compressive load applied to the intermediate molded body 20b by the pressure means 48 (that is, the second compression pressure plate 54) is the next largest, and is intermediate by the first compression pressure means 46 (that is, the first compression pressure plate 52). The compressive load applied to the molded body 20a is the smallest.

By controlling the magnitude of the compressive load applied by the first to third compression and pressurizing means 46, 48, 50 in this way, the meat of the peripheral side walls 122a, 122b, 122c of the intermediate molded bodies 20a, 20b, 20c. It is possible to suppress thinning by applying a larger compressive load to the compression drawing area where the thickness tends to be thinner.

In this embodiment, the pressure fluid supplied to the first to third fluid pressure cylinder mechanisms 64, 66.68 of the first to third compression and pressurizing means 46, 48, 50 is as shown in FIG. Although it is controlled, instead of such control, for example, the supply start timing of the pressure fluid supplied to the first to third fluid pressure cylinder mechanisms 64, 66, 68 (in other words, the action start of the compressive load). The timing) and the supply end timing (in other words, the action end timing of the compressive load) are the same as described above, but the pressure of the pressure fluid supplied to the first to third fluid pressure cylinder mechanisms 64, 66, 68 (in other words, In other words, the compressive load applied to the intermediate molded bodies 20a, 20b, 20c) may be kept constant.

The pressure of the pressure fluid (in other words, the fluid pressure load) supplied to the first to third fluid pressure cylinder mechanisms 64, 66, 68 of the first to third compression and pressurizing means 46, 48, 50 is shown in FIG. It may be controlled as shown in 6. In FIG. 6, in the pressure control of the pressure fluid in this modified form, in addition to the control shown in FIG. 5, the pressure of the pressure fluid is stepped when moving downward toward the bottom dead center of the upper die set 6. It is controlled to rise in a positive manner. In this modified form, the pressure of the pressure fluid supplied to the first and second fluid pressure cylinder mechanisms 46, 48 of the first and second compression and pressurizing means 46, 48 is raised in two stages, and is near the bottom dead center. When it becomes, the pressure is controlled to be the maximum. Further, the pressure of the pressure fluid supplied to the third fluid pressure cylinder mechanism 50 of the third compression / pressurizing means 50 is increased in three stages, and the pressure is controlled to be maximized near the bottom dead center. To.

By controlling in this way, in the first to third compression drawing processes in the first to third compression drawing areas 12, 14 and 16, the peripheral side walls 122a, 122b and 122c of the intermediate molded bodies 20a, 20b and 20c are formed. The largest fluid pressure load (fluid pressure) acts near the bottom dead point of the upper die set 6, which tends to be thinned, and as a result, the largest compressive force acts on the peripheral side walls 122a, 122b, 122c of the intermediate molded bodies 20a, 20b, 20c. As a result, it is possible to effectively suppress the wall thickness of the peripheral side walls 122a, 122b, 122c from becoming thin, and it is possible to increase the wall thickness in some cases. It should be noted that the control for gradually increasing the pressure of the pressure fluid does not have to be applied to all of the first to third fluid pressure cylinder mechanisms 46, 48, 50, and any one or any of them. It may be applied to two.

In addition, when the upper die set 6 returns toward the top dead center, the pressure of the pressure fluid temporarily rises further in the final period (T1, T2, T3) of the pressure application period in which the pressure of the pressure fluid is applied. It is controlled to do. In this modified form, the pressure of the pressure fluid supplied to the first to third fluid pressure cylinder mechanisms 46, 48, 50 of the first to third compression and pressurizing means 46, 48, 50 is the maximum near the bottom dead center. It is controlled to rise further than the pressure.

By controlling in this way, in the first to third compression drawing in the first to third compression drawing areas 12, 14 and 16, the first to third compression drawing dies 34, 36, 38 are intermediately formed. The pressure of the pressure fluid is temporarily further increased as it separates from the bodies 20b, 20c and the molded body 21. When the pressure of the pressure fluid rises, the first to third compression pressurizing plates 52, 54, 56 are lifted slightly upward to push the intermediate compacts 20b, 20c and the compact 21 into the first compression drawing punch 28, It acts to be removed from the 30 and 32, thus facilitating the removal of the intermediate molded bodies 20 and 20c and the molded body 21 after the first to third compression drawing processes. It should be noted that the control for temporarily increasing the pressure of the pressure fluid does not have to be applied to all of the first to third fluid pressure cylinder mechanisms 46, 48, 50, and any one or any of them. It may be applied to two.

Next, a modified form of the compression / pressurizing means will be described with reference to FIG. 7. In the following embodiments, substantially the same members as those in the above-described embodiment are designated by the same reference numbers, and the description thereof will be omitted. In FIG. 7, in this modified form, the basic configuration of the first compression / pressurization means 46A (second compression / pressurization means, third compression / pressurization means) is the same as that of the above-described embodiment, but the first The lengths of the pressurizing links 58A (second pressurizing link, third pressurizing link) are different, and in this form, the length L of the first pressurizing link 58 (second pressurizing link, third pressurizing link). (Specifically, the length from the portion supported by the pair of mounting brackets 70 via the support shaft 73 to the portion connected to the output portion 78 of the first fluid pressure cylinder mechanism 64 via the connecting shaft 76). As a result, the mounting position of the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism, third fluid pressure cylinder mechanism) to the mounting member 82 of the cylinder body 80 is on the outside (right side in FIG. 7). The position has been adjusted.

With this configuration, the output unit 78 of the first fluid pressure cylinder mechanism 64 (second fluid pressure cylinder mechanism, third fluid pressure cylinder mechanism) to the first pressurizing link 58A (second pressurizing link, third). The compressive force (fluid pressure load) transmitted to the first compression pressure plate 52 (second compression pressure plate, third compression pressure plate) via the pressurization link) is amplified, thereby causing the first compression. The compressive force applied to the intermediate molded bodies 20a (20b, 20c) during drawing (second compression drawing, third compression drawing) can be increased.

Contrary to this, the length L of the first pressurizing link 58 (second pressurizing link, third pressurizing link) (specifically, it is supported by a pair of mounting brackets 70 via a support shaft 73). The length from the formed portion to the portion connected to the output portion 78 of the first fluid pressure cylinder mechanism 64 via the connecting shaft 76) can be shortened. In this case, the first fluid pressure cylinder mechanism 64 (the first). The first compression pressure plate 52 (second) from the output unit 78 of the two fluid pressure cylinder mechanism and the third fluid pressure cylinder mechanism) via the first pressurization link 58A (second pressurization link, third pressurization link). The compressive force (fluid pressure load) transmitted to the compression pressurizing plate (third compression pressurizing plate) becomes smaller, and as a result, during the first compression drawing process (second compression drawing process, third compression drawing process). The compressive force applied to the intermediate molded bodies 20a (20b, 20c) can be reduced, and the length of the first pressurizing link 58A (second pressurizing link, third pressurizing link) is adjusted in this way. By (for example, replacing it with one having a different length), the compressive force applied to the intermediate molded body 20a (20b, 20c) at the time of the first compression drawing process (second compression drawing process, third compression drawing process) is applied. Can be adjusted.

In the above-described embodiment, the pressure of the pressure fluid supplied to the first to third fluid pressure cylinder mechanisms 64, 66, 68 of the first to third compression and pressurizing means 46, 48, 50 is as shown in FIG. , Or is configured to be controlled as shown in FIG. 6, but such control of the pressure fluid is not limited to the press device of the form shown in FIGS. 1 to 3, and the press of the form shown in FIG. 8 is used. The same can be applied to the apparatus, and in the press apparatus of other embodiments, the first to third compression and pressurizing means and the configurations related thereto are modified, and the other configurations are described above. It is virtually the same as the press device.

In FIG. 8, in this press apparatus, the first to third compression and pressurization means 46B, 48B, 50B are the first to third compression and pressurization plates 52B, 54B, 56B and the first to third fluid pressure cylinders. The mechanism 64, 66, 68 is provided, and the first to third fluid pressure cylinder mechanisms 64, 66, 68 are mounted in the press device main body 2 on the lower side of the lower die set 4.

In relation to this configuration, the compression transmission plate 132 is attached to the output unit 78 of the first to third fluid pressure cylinder mechanisms 64, 66, 68, and corresponds to the first to third compression pressure plates 52B, 54B, 56B. A plurality of (for example, four) compression transmission rods 134 (only two out of four are shown in FIG. 8) are connected to the compression transmission plates 132 to be used. Then, in order to enable such a connection, the lower die set 4 is provided with a plurality of compression transmission rods 134 for transmitting the compressive force from the first to third fluid pressure cylinder mechanisms 64, 66, 68. Through holes are provided corresponding to each, and these compression transmission rods 134 extend upward through the corresponding through holes, and the compression transmission rods 134 from the first to third fluid pressure cylinder mechanisms 64, 66, 68 are the first. It is connected to the 1st to 3rd compression pressurizing plates 52B, 54B, 56B.

Since it is configured in this way, the pressure fluid is supplied to the first to third compression and pressurizing plates 52B, 54B, 56B of the first to third compression and pressurizing means 46B, 48B, 50B, and their output units. When the 78 is stretched, it is transmitted to the first to third compression pressure plates 52B, 54B, 56B via the compression transmission plate 132, the plurality of compression transmission rods 134, and is lifted by information. Even with the configuration, as in substantially the same manner as described above, it is possible to apply a compressive force to the peripheral side walls of the intermediate molded bodies 20a, 20b, 20c to prevent the peripheral side walls from becoming thin.

Although the embodiment of the press device according to the present invention has been described above, the present invention is not limited to such an embodiment, and various changes or modifications can be made without departing from the scope of the present invention.

For example, in the above-described embodiment, three compression drawing regions for performing compression drawing are provided in the transfer direction of the intermediate molded body, but the present invention is not limited to such a configuration, and one or two in this transfer direction. Alternatively, four or more may be provided.

2 Press equipment body 4 Lower die set 6 Upper die set 10 Front drawing area 12, 14, 16 Compression drawing area 20, 20a, 20b, 20c Intermediate molded body 21 Molded body 22 Front drawing punch 24 Front drawing die 28 , 30, 32 Punch for compression drawing 34, 36, 38 Die for compression drawing 46, 46A, 46B, 48, 48B, 50, 50B Compression pressurization means 52, 52B, 54, 54B, 56, 56B Compression pressurization plate 58 , 58A, 60,62 Pressurizing link 64, 66, 68 Fluid pressure cylinder mechanism 96, 98, 100 Fluid supply pressure control means 102 Press control device

Claims (5)

The lower die set attached to the press device main body and the upper die set supported by the press device main body so as to be able to reciprocate in the vertical direction with respect to the lower die set are provided, and the lower die set and the upper die set are provided. A pre-drawing area and a compression drawing area are provided between the metal plate and the metal plate along a predetermined transfer direction, and while the metal plate is transferred through the pre-drawing area and the compression drawing area, the apex wall and the apex are provided. A press device for forming a molded body having a peripheral side wall extending downward from the outer peripheral portion of a wall and a flange portion extending radially outward from the lower end portion of the peripheral side wall.
A punch for front drawing is attached to the lower die set corresponding to the front drawing area, a die for front drawing is attached to the upper die set, and a die for compression drawing is attached to the upper die set. A punch for compression drawing is attached to the lower die set, a die for compression drawing is attached to the upper die set, and a compression / pressurizing means is provided in connection with the punch for compression drawing. The compression / pressurization means includes a compression / pressurization plate through which the compression drawing punch is inserted and acts on the flange portion of the molded body , a pressurization link connected to the compression / pressurization plate, and the pressurization link. A press device including a fluid pressure cylinder mechanism for applying a compressive force to the compression / pressurizing plate via. The pressurizing link of the compression / pressurizing means is swingably attached to the press device main body or the lower die set, and the cylinder body of the fluid pressure cylinder mechanism is attached to the press device main body to form the pressurizing link. The press according to claim 1, wherein one end of the press is rotatably connected to the compression / pressurizing plate, and the other end is rotatably connected to the output portion of the fluid pressure cylinder mechanism. apparatus. In connection with the fluid pressure cylinder mechanism of the compression and pressurizing means, a fluid pressure control means for controlling the fluid pressure supplied to the fluid pressure cylinder mechanism is provided, and the fluid pressure control means is described above. When the die set moves downward toward the bottom dead point, the fluid pressure supplied to the hydraulic pressure cylinder mechanism is controlled to increase stepwise, thus, the compression by the hydraulic pressure cylinder mechanism. The press device according to claim 1 or 2, wherein the compressive load applied to the pressure plate is gradually increased toward the bottom dead point. Two or more compression drawing processing areas are provided along the predetermined transfer direction, and the lower die set has a first compression drawing punch corresponding to the first compression drawing processing area on the upstream side. Along with being attached, a first compression drawing die is attached to the upper die set, and a second compression drawing punch is attached to the lower die set corresponding to the second compression drawing processing area on the downstream side. Along with being attached, a second compression drawing die is attached to the upper die set, and first and second compression and pressurizing means are provided in connection with the first and second compression drawing punches. The compression load applied to the second compression / pressurizing plate by the second fluid pressure cylinder mechanism of the second compression / pressurization means is applied to the first compression plate by the first cylinder mechanism of the first compression / pressurization means. The press device according to any one of claims 1 to 3, wherein the pressing load is larger than the compressive load. The operation start timing of the compression load applied to the second compression / pressurization plate by the second fluid pressure cylinder mechanism of the second compression / pressurization means is determined by the first fluid pressure cylinder mechanism of the first compression / pressurization means. The action start timing of the compression load applied to the first compression pressure plate is earlier than the action start timing of the compression load applied to the first compression pressure plate, and the action end timing of the compression load applied to the second compression pressure plate by the second fluid pressure cylinder mechanism is set. The press device according to claim 4, wherein the press device is later than the action end timing of the compression load applied to the first compression pressure plate by the first fluid pressure cylinder mechanism.

Images