JP6137489B2 - Press apparatus and press molding method - Google Patents

Description

  The present invention relates to a press apparatus and a press molding method.

  For example, the hub of an automobile suspension can be formed by forging consisting of a plurality of processes. Patent Document 1 discloses a forging die device configured by a die set having a plurality of stages corresponding to a plurality of steps. In such equipment where multiple processes are formed simultaneously by a single-acting press, eccentric load acts on the slide, and in actual forming, the capacity (rigidity) higher than the theoretical forming load (stamping load). ) Is required, which increases the size of the equipment. In addition, equipment that is configured to create a die set for each stage and perform molding in each process using a plurality of single-acting presses at the center of the press requires the same number of press equipment as the number of processes. The increase in cost and the installation space of the equipment are problems.

  Accordingly, the applicant of the present application shuttles (reciprocates) the punch-side die set and the die-side die set of a plurality of die sets corresponding to a plurality of steps to perform single-step molding of the plurality of steps. The idea was to construct a facility that would perform in the press center of the press equipment. However, in order to put such a facility into practical use, every cycle, in other words, every time the die set is moved, the problem of an increase in cycle time caused by opening and closing the die clamper (hydraulic clamping device) is cleared. There is a need.

JP 2008-264871 A

  Accordingly, the present invention has been made in view of the above circumstances, and a press device and a press molding method capable of repeatedly performing molding in a plurality of steps at the press center of a single-acting press device while ensuring productivity. It was made as an issue to provide.

In order to solve the above-mentioned problems, a press apparatus according to the present invention includes a plurality of die sets corresponding to a plurality of steps, a die set used in each step, a punch-side die set, and a die set used in each step. A single-acting press device having a positioning mechanism for positioning each die set at the center of the press by relatively moving the die side die set, and the punch of the die set positioned at the center of the press during the reciprocating motion of the slide a side die set and the die-side die set have a elastic contact means for resilient contact, said elastic contact means comprises a rod portion provided on the die set on one side of each die set, on the other side of the die set die And a repulsive force generating portion that is provided in the set and is pushed by the rod portion in the process of reciprocating the slide .

In order to solve the above-mentioned problems, the press molding method of the present invention is provided with a plurality of die sets corresponding to a plurality of steps in a single-acting press apparatus, and the die set used in each step is on the punch side. And the die side die set of the die set used in each step, and by positioning each die set at the press center, the molding of each step is sequentially performed at the press center, In the process of reciprocating the slide, the repulsive force generating part provided on the die set on the other side of the die set by the rod part provided on the die set on one side of the die set located at the press center The punch side die set of the die set located at the center of the press is pressed against the slide by the repulsive force generated by the pushing and repulsive force generating portion, The die-side die set of die set in the center, characterized in that for pressing the press foundation.

  According to the present invention, it is possible to repeatedly perform molding in a plurality of steps at the press center of one single-acting press apparatus while ensuring productivity.

It is explanatory drawing of this embodiment, Comprising: It is a front view of the principal part of the press apparatus in the state in which the 1st die set is located in the press center. It is explanatory drawing of this embodiment, Comprising: It is a front view of the principal part of the press apparatus in the state in which the 2nd die set is located in the press center. It is explanatory drawing of this embodiment, Comprising: It is a side view of the principal part of a press apparatus. It is explanatory drawing of this embodiment, Comprising: It is a figure which shows schematic structure of a punch side drive mechanism. It is explanatory drawing of this embodiment, Comprising: It is a figure which shows schematic structure of a die side drive mechanism. It is explanatory drawing of this embodiment, Comprising: It is a figure which shows the state in which the piston rod of the gas spring which opposes by the rod part of a 1st elastic contact mechanism is pushed. It is explanatory drawing of this embodiment, Comprising: It is a figure which shows the state in which the piston rod of the gas spring which opposes by the rod part of a 2nd elastic contact mechanism is pushed. It is explanatory drawing of the press molding method which concerns on this embodiment, Comprising: (A) is a figure explaining the step of material injection | throwing-in at the beginning of a device, (B) is a step in which the 1st process shaping | molding is performed at the beginning of a device FIG. 4C is a diagram for explaining a stage in which molding and material input in the second process are performed in the circulation process, and FIG. 4D is a diagram in which molding of the first process and removal of the finished product are performed in the circulation process. It is a figure explaining the stage to be called.

  An embodiment of the present invention will be described with reference to the accompanying drawings. Note that the press device according to the present embodiment has the same basic structure as a known single-acting press device in which the slide 11 reciprocates in the vertical direction (vertical direction in FIGS. 1 and 2). Here, for the purpose of simplifying the description of the specification, a description of a known basic structure of the press apparatus is omitted.

  As shown in FIG. 1 and FIG. 2, the press device includes a first mold 1 used for molding in the first process and a second mold 2 used for molding in the second process. The first mold 1 is composed of a punch 1A (upper mold) and a die 1B (lower mold). The second mold 2 is composed of a punch 2A (upper mold) and a die 2B (lower mold). The pressing device includes a first die set 3 to which the first mold 1 is attached and a second die set 4 to which the second mold 2 is attached. The first die set 3 includes a punch side die set 3A to which the punch 1A is attached and a die side die set 3B to which the die 1B is attached. The second die set 4 includes a punch-side die set 4A to which the punch 2A is attached and a die-side die set 4B to which the die 2B is attached.

  Punch side die sets 3A and 4A (one side die set) of each die set 3 and 4 are arranged in the order of punch side die set 3A and punch side die set 4A from the right side to the left side in FIGS. . On the other hand, the die side die sets 3B and 4B (other side die sets) of the die sets 3 and 4 are arranged in the order of the die side die set 3B and the die side die set 4B from the left side to the right side in FIGS. Is done. In other words, the punch-side die sets 3A, 4A of the die sets 3, 4 and the die-side die sets 3B, 4B of the die sets 3, 4 are alternately arranged in the left-right direction in FIGS.

  Then, referring to FIG. 1, when the first die set 3 is located at the center of the press, and thus when the first mold 1 is located at the center of the press, the die on the die side die set 4B. A fixed space is formed above 2B (on the right side of punch 1A in FIG. 1). This space is useful when removing the finished product from the die 2A. On the other hand, referring to FIG. 2, when the second die set 4 is located at the center of the press, and thus when the second die 2 is located at the center of the press, the die on the die-side die set 3B. A fixed space is formed above 1B (on the left side of punch 2A in FIG. 2). This space is useful when the material is put into the die 1B.

  The punch-side die set 3A and the punch-side die set 4A are connected by a known connecting means, and a die set arrangement direction (see FIG. 1) is provided by a punch-side guide 15A (see FIG. 3) provided on the slide lower surface 12. , In the left-right direction in FIG. The die-side die set 3B and the die-side die set 4B are connected by a known connecting means, and a die-set arrangement direction (see FIG. 3) is provided by a die-side guide 15B (see FIG. 3) provided on the bed upper surface 14. 1 in the left-right direction in FIG.

  The press device includes a positioning mechanism that positions the first die set 3 and the second die set 4 alternately at the press center (slide center). As shown in FIG. 3, the positioning mechanism shuttles (reciprocates) punch die sets 3A and 4A (one die set) of each die set 3 and 4 in the die set arrangement direction (the line of sight in FIG. 3). A punch-side drive mechanism 17A for alternately positioning the punch-side die set 3A and the punch-side die set 4A at the center of the press, and the die-side die sets 3B, 4B of the die sets 3 and 4 (the other side die). A die-side drive mechanism 17B that causes the die-side die set 3B and the die-side die set 4B to be alternately positioned at the center of the press by shuttle movement (reciprocating) in the die set arrangement direction, the punch-side drive mechanism 17A, and the die And a control device 16 (see FIG. 3) that controls the operation of the side drive mechanism 17B.

  As shown in FIGS. 3 and 4, the punch side drive mechanism 17A is arranged along the punch side guide 15A, that is, a screw shaft arranged in parallel to the die set arrangement direction (left and right direction in FIG. 4). 18A, a connecting arm 20A for connecting the ball nut 19A screwed to the screw shaft 18A and the punch-side die sets 3A, 4A, and the screw shaft 18A are driven to rotate based on a control signal output from the control device 16. Servo motor 21A. Similarly, as shown in FIGS. 3 and 5, the die-side drive mechanism 17B is arranged along the die-side guide 15B, that is, parallel to the die set arrangement direction (left-right direction in FIG. 5). Screw shaft 18B, a connecting arm 20B for connecting the die 19 and the ball nut 19B screwed to the screw shaft 18B, and the screw shaft 18B based on a control signal output from the control device 16. And a servo motor 21B for rotational driving.

  As shown in FIGS. 1 and 2, the press apparatus has a floating mechanism that floats the die-side die sets 3 </ b> B and 4 </ b> B (other-side die sets) of the respective die sets 3 and 4 with respect to the bed 13 (press base). (Floating means). The floating mechanism is configured by arranging a prescribed number of floating rollers 23 (spring built-in rollers) in each die-side die set 3B, 4B. With this levitation mechanism, it is possible to reduce the load when the die-side die sets 3B and 4B are shuttled (reciprocated) in the die set arrangement direction, and thus a servo motor 21B having a smaller capacity is adopted. It is possible. Note that the floating mechanism can be configured by arranging the floating roller 23 on the bed 13.

  The press apparatus is a process of elastic contact (elastic contact) between the punch side die sets 3A and 4A and the die side die sets 3B and 4B of the die sets 3 and 4 located at the center of the press in the process of reciprocating the slide 11. Means). The elastic contact mechanism includes a first elastic contact mechanism that elastically contacts the punch side die set 3A and the die side die set 3B when the first die set 3 is positioned at the center of the press (see FIG. 1), and a second die. When the set 4 is positioned at the center of the press (see FIG. 2), a second elastic contact mechanism that elastically contacts the punch side die set 4A and the die side die set 4B is included. The term “elastic contact” refers to contacting a rigid body (corresponding to a “rod portion” described later in this embodiment) and an elastic body (corresponding to “gas spring” described later in this embodiment), in other words, It means that the rigid body is received by the elastic body.

In the present embodiment, the first elastic contact mechanism and the second elastic contact mechanism have the same structure. Here, only the first elastic contact mechanism will be described, and the description of the second elastic contact mechanism will be omitted.
As shown in FIGS. 1 and 3, a plurality of first elastic contact mechanisms are provided in the punch side die set 3A (one side die set) and extend perpendicularly to the punch side die set 3A (this embodiment). 4 in the form) and the same axis with respect to each rod portion 25 in a state where the first die set 3 is positioned at the center of the press provided on the die side die set 3B (die set on the other side). A plurality of (four in this embodiment) gas springs 31 (repulsive force generating portions) positioned on the line. The gas spring 31 includes a cylinder 32, a piston rod 33 in which a piston is integrally formed, a gas chamber defined by the cylinder 32 and the piston, and a compressed gas (for example, nitrogen gas) filled in the gas chamber. The piston rod 33 is configured to be urged toward the extension side by the pressure of the compressed gas.

  In the first elastic contact mechanism, the process in which the slide 11 reciprocates with the first die set 3 positioned at the center of the press, specifically, the process in which the slide 11 strokes from the top dead center to the bottom dead center. More specifically, the piston rod 33 of each gas spring 31 facing each other is pushed by each rod portion 25 at a timing before the timing at which the punch 1A and the die 1B are brought into contact with each other. Thereby, each gas spring 31 generates a predetermined repulsive force (hereinafter referred to as “repulsive force of the gas spring 31”).

  The punch die set 3A is pressed against the slide 11 by the repulsive force of the gas spring 31, and is fixed in close contact with the slide 11 as shown in FIGS. On the other hand, the die side die set 3B is pressed against the bed 13 against the spring force of the spring built in the floating roller 23 by the repulsive force of the gas spring 31, and as shown in FIGS. When the gap between the die-side die set 3 </ b> B and the bed 13 becomes zero, the die-side die set 3 </ b> B is fixed in close contact with the bed 13. As a result, the parallelism between the punch side die set 3A and the die side die set 3B is secured. The repulsive force of the gas spring 31 is determined in consideration of the spring force of the spring built in the floating roller 23 and the pressing force against the slide 11 and the bed 13 required for fixing the first die set 3. Is done.

  The first elastic contact mechanism relatively positions the punch-side die set 3A and the die-side die set 3B positioned at the center of the press. As a result, the first die 1 attached to the first die set 3 is centered. It has a centering function. As shown in FIGS. 1 and 3, the first elastic contact mechanism is provided in the die side die set 3 </ b> B (the other side die set) and is positioned on the same axis with respect to each gas spring 31. A plurality of (four in this embodiment) guide sleeves 27 are included. Inside each guide sleeve 27, a gas spring 31 for receiving each opposing rod portion 25 is disposed. As the guide sleeve 27, for example, a guide bush or the like can be used.

  In the first elastic contact mechanism, the process in which the slide 11 reciprocates with the first die set 3 positioned at the center of the press, specifically, the process in which the slide 11 strokes from the top dead center to the bottom dead center. More specifically, the rod portions 25 are inserted into the opposing guide sleeves 27 at a timing before the gap between the die-side die set 3B and the bed 13 becomes zero. Thereby, the punch side die set 3A and the die side die set 3B are relatively positioned, and the first mold 1 is centered.

Next, with reference to FIG. 8, the press molding method according to this embodiment will be described. Here, a press forming method of a forged part that is formed into a product shape through two steps using the above-described press apparatus will be described.
8A, the second die set 4 is positioned at the center of the press by the positioning mechanism. That is, the punch-side die set 4A is positioned at the center of the press by driving the punch-side drive mechanism 17A. The die side die set 4B is driven by the die side drive mechanism 17B and positioned at the center of the press. Then, in a state where the second die set 4 is positioned at the center of the press, in other words, with the punch 2A and the die 2B positioned at the center of the press, the die 1B on the die side die set 3B is placed on, for example, a robot or the like. Material is input by the material input device ((1) Material input in FIG. 8).

  When the introduction of the material into the die 1B is completed, as shown in FIG. 8B, the punch side die sets 3A, 4A (one side die set) and the die side die sets 3B, 4B (other side) are positioned by the positioning mechanism. The first die set 3 is positioned at the center of the press ((2) Die set movement in FIG. 8). That is, the punch side die set 3A, 4A is driven by the punch side drive mechanism 17A, and the punch side die set 3A, 4A is moved leftward from the position shown in FIG. 3A is positioned at the center of the press. At the same time, the die side die sets 3B and 4B are driven by the die side drive mechanism 17B, and the die side die sets 3B and 4B are moved rightward from the position shown in FIG. 3B is positioned at the center of the press.

  In other words, the punch-side die set 3A and the die-side die set are moved by moving the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B in the opposite left and right directions (in opposite phases) with the press center as a base axis. 3B is positioned at the center of the press. When the die sets 3 and 4 are moved, the die side die sets 3B and 4B are lifted by a fixed distance from the bed upper surface 14 by the floating roller 23 (see FIGS. 1 and 2). When the control device 16 recognizes that the first die set 3 has been positioned at the center of the press, the first molding at the beginning of the setting is performed by the first die 1 attached to the first die set 3. It is performed at the center of the press ((3) molding in FIG. 8).

  Here, in the process in which the slide 11 reciprocates, specifically, in the process in which the slide 11 strokes from the top dead center to the bottom dead center, each rod portion 25 of the punch side die set 3A faces the die side die set 3B. By being inserted into each guide sleeve 27, the punch side die set 3 </ b> A and the die side die set 3 </ b> B are relatively positioned, and thus the first mold 1 is centered. Further, the process in which the slide 11 reciprocates, more specifically, the process in which the slide 11 strokes from the top dead center to the bottom dead center, more specifically, the timing before the punch 1A and the die 1B are brought into contact with each other. At the timing, the piston rod 33 of each gas spring 31 facing the die side die set 3B is pushed in by each rod portion 25 of the punch side die set 3A.

  Thereby, the punch-side die set 3 </ b> A is pressed against the slide 11 by the repulsive force of the gas spring 31 and is fixed in close contact with the slide 11. On the other hand, the die side die set 3B is pressed against the bed 13 against the spring force of the spring built in the floating roller 23 by the repulsive force of the gas spring 31, and the gap between the die side die set 3B and the bed 13 is reduced. It becomes 0 and is fixed in close contact with the bed 13. As a result, the parallelism between the punch side die set 3A and the die side die set 3B in the first step is ensured. In addition, when the rods 25 are separated from the opposing gas springs 31 in the process of sliding the slide 11 from the bottom dead center to the top dead center, the die-side die sets 3B and 4B are moved to the bed by the floating roller 23. It is lifted a certain distance with respect to the upper surface 14.

  When the first step is completed, the molded product (first molded product) is released from the die 1B by the knockout device built in the bed 13. The released first molded product is taken out from the die 1B by the work conveying device and is put into the die 2B on the die side die set 4B ((4) molded product shift in FIG. 8). When the introduction of the first molded product into the die 2B is completed, as shown in FIG. 8C, the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B are moved alternately by the positioning mechanism. Thus, the second die set 4 is positioned at the center of the press ((5) Die set movement in FIG. 8).

  That is, the punch side die set 3A, 4A is driven by the punch side drive mechanism 17A, and the punch side die set 3A, 4A is moved rightward from the position shown in FIG. 4A is positioned at the center of the press. At the same time, the die side die sets 3B and 4B are driven by the die side drive mechanism 17B, and the die side die sets 3B and 4B are moved leftward from the position shown in FIG. 4B is positioned at the center of the press. In other words, the punch-side die set 4A and the die-side die set are moved by moving the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B in the opposite left and right directions (in opposite phases) with the press center as a base axis. 4B is positioned at the center of the press.

  When the control device 16 recognizes that the second die set 4 has been positioned at the press center, the molding in the second step is performed at the press center by the second mold 2 attached to the second die set 4. Performed ((6) molding in FIG. 8). Here, in the process in which the slide 11 reciprocates, specifically, in the process in which the slide 11 strokes from the top dead center to the bottom dead center, each rod portion 25 of the punch side die set 4A is opposed to the die side die set 4B. By being inserted into each guide sleeve 27, the punch side die set 4 </ b> A and the die side die set 4 </ b> B are relatively positioned, and thus the second mold 2 is centered. Further, the process in which the slide 11 reciprocates, specifically, the process in which the slide 11 strokes from the top dead center to the bottom dead center, more specifically, the timing before the punch 2A and the die 2B are brought into contact with each other. At the timing, the piston rod 33 of each gas spring 31 facing the die side die set 4B is pushed in by each rod portion 25 of the punch side die set 4A.

  Thereby, the punch-side die set 4 </ b> A is pressed against the slide 11 by the repulsive force of the gas spring 31 and is fixed in close contact with the slide 11. On the other hand, the die side die set 4B is pressed against the bed 13 against the spring force of the spring built in the floating roller 23 by the repulsive force of the gas spring 31, and the gap between the die side die set 4B and the bed 13 is pressed. Becomes 0 and is fixed in close contact with the bed 13. As a result, the parallelism between the punch-side die set 4A and the die-side die set 4B in the second step is ensured. In addition, when the rods 25 are separated from the opposing gas springs 31 in the process of sliding the slide 11 from the bottom dead center to the top dead center, the die-side die sets 3B and 4B are moved to the bed by the floating roller 23. It is lifted a certain distance with respect to the upper surface 14.

  When the second step is completed, the molded product (finished product) is released from the die 2 </ b> B by the knockout device built in the bed 13. Here, in parallel with the molding in the second step, the material is charged into the die 1B on the die side die set 3B by the material loading device ((7) Material loading in FIG. 8). When the introduction of the material into the die 1B is completed, as shown in FIG. 8D, the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B are moved alternately by the positioning mechanism. One die set 3 is positioned at the center of the press ((8) Die set movement in FIG. 8).

  That is, the punch side die set 3A, 4A is driven by the punch side drive mechanism 17A, and the punch side die set 3A, 4A is moved leftward from the position shown in FIG. 3A is positioned at the center of the press. At the same time, the die side die sets 3B and 4B are driven by the die side drive mechanism 17B and the die side die sets 3B and 4B are moved rightward from the position shown in FIG. 3B is positioned at the center of the press. In other words, the punch-side die set 3A and the die-side die set are moved by moving the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B in the opposite left and right directions (in opposite phases) with the press center as a base axis. 3B is positioned at the center of the press.

  When the control device 16 recognizes that the first die set 3 is positioned at the center of the press, the molding in the first step is performed at the center of the press by the first mold 1 attached to the first die set 3. Performed ((9) molding in FIG. 8). When the first step is completed, the molded product (first molded product) is released from the die 1B by the knockout device built in the bed 13. Here, in parallel with the molding in the first step, the finished product released from the die 2B is taken out from the die 2B on the die side die set 4B by a work conveying device such as a robot ((10 in FIG. 8). ) Finished product removal).

  The first molded product is taken out from the die 1B by the work conveying device and is put into the die 2B on the die side die set 4B ((11) molded product shift in FIG. 8). When the introduction of the first molded product into the die 2B is completed, the second die set 4 is positioned at the center of the press by the positioning mechanism as shown in FIG. 8C ((12) die set in FIG. 8). Move). Then, the molding in the second step is performed at the center of the press by the second die 2 attached to the second die set 4 ((6) molding in FIG. 8), and in parallel, on the die side die set 3B. Material is charged into the die 1B ((7) Material charging in FIG. 8).

  Thus, in this embodiment, after going through the process of starting the setting from (1) material input to (5) die set movement in FIG. 8, punch side die sets 3A, 4A (one side die set) and die The side die sets 3B and 4B (other side die sets) are shuttle-moved in opposite phases, and the first die set 3 and the second die set 4 are alternately positioned at the center of the press (6 in FIG. ) Each process from molding to (12) die set movement is sequentially repeated.

This embodiment has the following effects.
According to the present embodiment, the punch side die sets 3A, 4A (one side die set) and the die side die sets 3B, 4B (other side die sets) are arranged alternately to form the punch side die set 3A, 4A and die-side die sets 3B and 4B are shuttled in opposite phases, so that punch-side die sets 3A and 4A and die-side die sets 3B and 4B are alternately positioned at the center of the press to form each process. Is configured to be performed mainly in the press.
Thus, since the molding in each step is performed at the press center of the single-acting press device, no eccentric load acts on the slide 11 during press molding. This eliminates the need for a press device having a higher capacity (rigidity) than the theoretical forming load (stamping load) as in the prior art configured to perform a plurality of steps of molding simultaneously. An increase in size can be avoided.

In addition, unlike the prior art in which the molding of each process is performed at the center of the press by a plurality of single-acting presses, it is not necessary to provide the same number of single-acting presses as the number of processes. Two-step molding can be performed with a press, and the number of press devices to be installed can be halved. As a result, the equipment cost and the installation space of the equipment can be halved.
In addition, a constant space can be formed above the die 1B and the die 2B when the material is put into the die 1B and when the finished product is taken out from the die 2B. In other words, it is possible to charge the material into the die 1B and take out the finished product from the die 2B at a position away from the center of the press, and the degree of freedom in equipment design can be expanded.
Furthermore, the material feeding operation and the finished product taking-out operation can be performed in parallel with the molding operation, that is, the reciprocating operation of the slide 11, and the cycle time can be shortened and the productivity can be improved.

And according to this embodiment, in the process in which the slide 11 reciprocates, the respective gas springs 31 of the die side die sets 3B, 4B are opposed to each other by the rod portions 25 of the punch side die sets 3A, 4A located at the center of the press. The piston rod 33 of the (repulsive force generating part) is pushed in. Accordingly, the punch-side die sets 3 </ b> A and 4 </ b> A can be fixed by being pressed against the slide 11 by the repulsive force of the gas spring 31 and brought into close contact with the slide 11. On the other hand, the die-side die sets 3 </ b> B and 4 </ b> B can be fixed by being pressed against and brought into close contact with the bed 13 by the repulsive force of the gas spring 31. As a result, it is possible to fix the die sets 3 and 4 to the press body using the reciprocating motion of the slide 11, and the punch side die sets 3A and 4A and the die side die sets 3B and 4B located at the center of the press The parallelism can be ensured.
Therefore, it is possible to eliminate the die clamper (hydraulic clamping device), and it is possible to suppress a decrease in productivity due to an increase in cycle time. Moreover, since a fluid pressure circuit (hydraulic circuit) for driving the die clamper is not required, the equipment cost can be reduced.

Further, in the process of reciprocating the slide 11, the rod portions 25 of the punch-side die sets 3A and 4A positioned at the center of the press are inserted into the opposing guide sleeves 27 of the die-side die sets 3B and 4B. Thereby, the punch-side die sets 3A, 4A and the die-side die sets 3B, 4B can be relatively positioned by using the reciprocating motion of the slide 11, and the dies 1, 2 can be centered.
Furthermore, since the die side die sets 3B and 4B (die sets on the other side) of each die set 3 and 4 are equipped with a floating mechanism (floating means) that floats with respect to the bed 13 (press base), the die side die set It is possible to reduce the load when the 3B and 4B are shuttled (reciprocated) in the direction of the die set arrangement, and the equipment cost can be reduced by adopting the servo motor 21B having a smaller capacity. it can.

In addition, embodiment is not limited above, For example, it can comprise as follows.
In the present embodiment, a so-called ball screw drive mechanism is employed in which the screw shafts 18A and 18B are rotationally driven by the servo motors 21A and 21B as the positioning mechanism. However, the punch side die sets 3A and 4A (one side die set) and As a drive source for shuttle movement of the die side die sets 3B and 4B (other side die sets), for example, a hydraulic cylinder such as a hydraulic cylinder or a pneumatic cylinder can be employed.
Moreover, although the gas spring 31 was applied as a repulsive force generation | occurrence | production part of an elastic contact mechanism (elastic contact means), it can replace with the gas spring 31 and can apply a compression coil spring, for example.
Further, a floating mechanism (floating means) can be configured by providing a lift type roller that lifts and down using fluid pressure on the press substrate.
In the present embodiment, the arrangement direction of the punch side die sets 3A and 4A (one side die set) and the arrangement direction of the die side die sets 3B and 4B (other side die set) are set in parallel. It is possible to set non-parallel so that the arrangement direction of the punch-side die sets 3A, 4A and the arrangement direction of the die-side die sets 3B, 4B intersect at the press center.
In this case, a plurality of die sets corresponding to a plurality of processes are provided in the single-acting press apparatus, and the punch side die set and the die side die set of the plurality of die sets corresponding to the plurality of processes are moved relative to each other. Thus, each die set can be positioned at the center of the press, and molding of each process can be performed at the center of the press of the single-acting press device.

3 First die set, 4 Second die set, 11 slide, 17A Punch side drive mechanism (positioning mechanism), 17B Die side drive mechanism (positioning mechanism), 23 Floating roller (levitation means), 25 Rod part (elastic contact) Means), 26 gas spring (repulsive force generating part of elastic contact means), 27 guide sleeve

Claims (6)

Each die set is pressed by relatively moving a plurality of die sets corresponding to a plurality of processes, a die die set used in each process, and a die set die used in each process. A single-acting press device comprising a positioning mechanism for positioning at the center,
Slide have a elastic contact means for elastic contact with the punch-side die set and the die-side die set of die sets located in the press center in the course of reciprocating movement,
The elastic contact means includes a rod portion provided on a die set on one side of each die set, and a repulsion which is provided on the other die set of each die set and is pushed by the rod portion in the process of reciprocating movement of the slide. And a force generator . A guide sleeve provided in the die set on the other side of each die set, into which the rod portion is inserted and removed in the process of reciprocating the slide;
The press apparatus according to claim 1 , wherein the repulsive force generation unit is disposed inside the guide sleeve. Press device according to claim 1 or 2, characterized in that it comprises a floating means for floating the die-side die set of each die set for pressing infrastructure. A plurality of die sets corresponding to a plurality of processes are provided in a single-acting press machine, and a die set punch side die set used in each process and a die set die set used in each process It is a press molding method in which molding of each process is sequentially performed at the center of the press by relatively moving and positioning each die set at the center of the press,
In the process of reciprocating the slide, the repulsive force generating part provided on the die set on the other side of the die set by the rod part provided on the die set on one side of the die set located at the press center The punch side die set located at the center of the press is pressed against the slide by the repulsive force generated by the repulsion force generating portion, and the die side die set of the die set located at the center of the press is used as a press base. press-forming method characterized by pressing. In the process of reciprocating the slide, a guide provided on a die set on the other side of the die set is provided with a rod part provided on one side of the die set located on the center of the press. The press molding method according to claim 4 , wherein the press molding method is inserted into and removed from the sleeve. 6. The press molding method according to claim 4 , wherein the die side die set of each die set is moved in a state of being floated with respect to the press substrate.

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