JP7182269B2 - Press molding equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a press forming apparatus provided with a positioning unit for positioning a material to be pressed before press forming.

2. Description of the Related Art Conventionally, a press-molded body used as a body part of an automobile is obtained by press-molding a sheet-like material to be pressed using a press-molding apparatus. The press molding apparatus includes a first mold on which a material to be pressed is placed, and a second mold disposed above the first mold so as to be vertically movable, and the second mold is lowered. Thus, it is generally known that a press-formed body is obtained by plastically deforming the material to be pressed with the first mold.

By the way, in the press molding apparatus as described above, when the material to be pressed is placed on the first mold, the material to be pressed should not be in a position that deviates from the target position with respect to the first mold. For this purpose, a positioning unit is provided for positioning the material to be pressed. For example, the positioning unit of the press molding apparatus disclosed in Patent Document 1 has a first mold sandwiched between a plurality of fixed guide members arranged at predetermined intervals around the first mold in the horizontal direction. They are arranged facing each other. Each positioning unit includes a fluid pressure cylinder having a piston rod extending and contracting toward each fixed guide member, and a pressing member fixed to the tip of the piston rod. By extending the piston rod of each positioning unit and pushing the material to be pressed with each pressing member, the material to be pressed is moved until the material to be pressed contacts each fixed guide member, thereby positioning the material to be pressed. Is going.

JP 2006-224105 A

However, in Patent Literature 1, each positioning unit is structured to be operated by a fluid pressure cylinder. Therefore, a control device for controlling the fluid pressure cylinder so as to operate at an appropriate timing for the upward/downward movement of the second mold. There is a problem that the manufacturing cost increases.

In addition, since the fluid pressure cylinder of each positioning unit is arranged on the side of the pressing member opposite to the first mold, the size of the device tends to increase in the horizontal direction, and there is a risk that a large installation space for the device will be required. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a compact and low-cost press forming apparatus capable of reliably positioning a material to be pressed. That's what it is.

In order to achieve the above object, the present invention provides a positioning unit in which a member for moving a material to be pressed moves toward a first mold by being pushed by the second mold during the downward movement of the second mold. It is characterized by doing so.

That is, in the first invention, a first mold having a first molding surface is arranged above the first mold so as to face each other so as to be able to move up and down. A second mold having a second molding surface for plastically deforming the material placed on the first mold to obtain a press-formed body, and a plurality of molds arranged at predetermined intervals around the first mold. a positioning unit for determining the position of the material to be pressed with respect to the first mold when placing the material to be pressed on the first mold, the positioning unit being positioned in front of the first mold; A block body having a positioning surface for determining the position of the outer peripheral edge of the material to be pressed, a support frame for supporting the block body so as to move back and forth with respect to the first mold, and the positioning surface being the first mold. and a biasing means for biasing the block on the side away from the block, the block is configured such that its longitudinal direction extends in the vertical direction, and the second mold projects downward and has a projecting end with a A plurality of projecting portions located below the second molding surface are provided at positions corresponding to the positioning units, and one of the block body and the projecting portion gradually increases as it moves away from the first mold. a slanted surface slanted so as to be positioned downward; and a vertically extending sliding contact surface continuously provided on a side of the slanted surface away from the other of the block body and the projection, As the second mold descends, the positioning surface approaches the first mold against the biasing force of the biasing means while slidingly contacting the other of the block body and the projecting portion. The sliding contact surface is configured to slide against the other of the block and the projecting portion when the second molding surface plastically deforms the pressed material. The support frame pivotally supports the intermediate portion of the block body so as to be able to swing about a swing axis extending in a horizontal direction orthogonal to the front-rear direction of the block body, and the biasing means includes the positioning surface. urges the block body to swing upward, and the block body swings about the swing axis to move forward and backward with respect to the first mold . It is characterized by

In a second invention according to the first invention, the support frame includes a horizontally extending base plate and a support portion projecting upward from a middle portion of the base plate,
The upper end portion of the support portion pivotally supports the lower middle portion of the block body on the side of the first mold from the projecting portion in the horizontal direction so as to be able to swing about the swing axis . Characterized by

In a third invention, in the first or second invention, a guide extending obliquely downward toward the first mold side and connected to the positioning surface is provided on the front upper portion of the block body. A face is provided.

In a fourth invention, in the second invention, the biasing means is a spring member, and the spring member is arranged closer to the first mold side than the projecting portion and the supporting portion in the horizontal direction. It is characterized by being

In a fifth aspect of the invention, in the first aspect, the urging means is attached to the rear side of the block body, and the portion of the block body on the rear side of the swing axis is the front side of the swing axis. The weight is set so as to be heavy with respect to the weight.

In the first invention, when the material to be pressed is placed on the first mold and the second mold is lowered, the inclined surface provided on either one of the block body and the projecting portion is inclined to the block body and the projecting portion. As the second mold descends while being in sliding contact with the other, the second mold applies force to the block body toward the first mold. Then, the block moves forward, and the positioning surface presses and moves the material to be pressed to a predetermined position, thereby determining the position of the material to be pressed with respect to the first die. When the second mold is further lowered, the vertically extending sliding contact surface provided on one of the block body and the projecting part brings the other one of the block body and the projecting part into sliding contact with the block body. is kept constant and the positioning surface is maintained at a predetermined position. Therefore, press molding can be performed in a state in which the material to be pressed is positioned at the target position in the first mold. Further, each positioning unit is not structured to be operated by a fluid pressure cylinder, but is configured to be moved by being pushed by the second mold due to the downward movement of the second mold. There is no need to manufacture a control device for controlling the fluid pressure cylinders so that they operate at appropriate timings for the upward and downward movements of the two molds, and the manufacturing cost can be reduced. Furthermore, since each positioning unit is not provided with a fluid pressure cylinder as in Patent Document 1, the device can be made horizontally compact compared to the device in Patent Document 1.

In addition, in the first invention, compared with a structure in which the support frame slidably supports the block body, for example, it is difficult for dust or the like to accumulate between the support frame and the block body. can do.

In the third invention, when the material to be pressed is placed on the first mold, even if the input position of the material to be pressed with respect to the first mold deviates greatly from the target position in the horizontal direction, Each guide surface guides the material to be pressed to the vicinity of the target position while sliding the outer peripheral edge of the material to be pressed. Therefore, it is possible to prevent the equipment from being stopped because the plate to be pressed cannot be placed at the target position of the first die.

In the fourth aspect of the invention, when the second mold is lifted after the press-formed body is formed by the mold closing operations of the first mold and the second mold, the block body moves to the original position by the spring force of the spring member. will come to Therefore, the state of the apparatus can be quickly returned to a state in which the next press forming can be performed.

In the fifth invention, when the second mold is lifted after the press-formed body is formed by the mold closing operations of the first mold and the second mold, the weight of the rear side of the block moves the block back to its original position. It will oscillate up to Therefore, the state of the apparatus can be quickly returned to a state in which the next press molding can be performed without incurring the cost of parts as compared with the second invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic sectional drawing of the press molding apparatus which concerns on Embodiment 1 of this invention. 1. It is a figure which shows the state immediately after starting positioning of the to-be-pressed material with respect to a 1st metal mold|die after FIG. FIG. 3 is a view after FIG. 2 showing a state immediately after the positioning of the pressed material with respect to the first die is completed; After FIG. 3, it is a figure which shows the state immediately after press-molding the to-be-pressed material with a 1st metal mold|die and a 2nd metal mold|die, and obtaining a press-formed body. It is a figure which shows the state where the 2nd metal mold|die was raised after FIG. FIG. 1 is a view corresponding to FIG. 1 according to Embodiment 2 of the present invention. 1 equivalent view according to Embodiment 3 of the present invention. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail based on the drawings. It should be noted that the following description of preferred embodiments is merely exemplary in nature.

<<Embodiment 1 of the Invention>>
FIG. 1 shows a press molding device 1 according to Embodiment 1 of the present invention. The press molding apparatus 1 includes a base 2 installed on a floor surface F, and an elevating table 3 arranged above the base 2 so as to be vertically movable under the control of a servomotor (not shown).

As shown in FIG. 2, a first mold 4 for placing a sheet-like steel plate 10 (material to be pressed) is fixed on the central upper surface of the base 2. , a gently curved first molding surface 4a having a concave cross-section is formed.

A plurality of positioning units 6 that determine the position of the steel plate 10 with respect to the first mold 4 are arranged around the first mold 4 at predetermined intervals when the steel plate 10 is placed on the first mold 4. ing.

The positioning unit 6 includes a block body 6a extending vertically, and a positioning surface 6b for determining the position of the outer peripheral edge of the steel plate 10 is provided on the front side portion of the block body 6a with respect to the first mold 4. As shown in FIG.

A guide surface 6c is formed on the front upper portion of the block 6a so as to be inclined downward toward the first mold 4 and connected to the positioning surface 6b.

On the other hand, a rectangular cutout portion 6j is formed in the rear upper portion of the block body 6a, and a rear end surface 6d extending parallel to the positioning surface 6b is provided on the rear side of the block body 6a.

A rod-like projection 6g is provided at a rear upper corner of the block 6a and projects in a horizontal direction perpendicular to the front-rear direction of the block 6a.

A support frame 6f for supporting the block 6a is provided below the block 6a. The support frame 6f includes a horizontally extending base plate 6k and a support projecting upward from the middle portion of the base plate 6k. 6m.

The upper end portion of the support portion 6m pivotally supports the lower middle portion of the block body 6a so as to be able to swing about a swing axis C1 extending in a direction perpendicular to the front-rear direction of the block body 6a.

That is, the block body 6a is configured to move forward and backward with respect to the first mold 4 by rocking around the rocking axis C1.

A spring member 6e (biasing means) is arranged on the lower front side of the block body 6a. One end of the spring member 6e is fixed to the front lower surface of the block body 6a, while the other end is fixed to the first mold 4 side above the base plate 6k. 1 The front side of the block 6a is urged upward so that the block 6a swings upward away from the mold 4. As shown in FIG.

Above the first mold 4, a second mold 5 having a second molding surface 5a having a substantially convex cross-section on the central lower surface is arranged oppositely. It has a shape corresponding to the molding surface 4a.

A plurality of protrusions 5b protruding downward are provided at predetermined intervals on the outer peripheral edge of the second mold 5, and each protrusion 5b is positioned corresponding to each positioning unit 6. .

The protruding end of each protruding portion 5b is positioned below the second molding surface 5a, and the protruding end of the protruding portion 5b on the side of the second molding surface 5a gradually decreases downward as it moves away from the first mold 4. An inclined surface 5c is formed so as to be positioned.

Further, a vertically extending sliding contact surface 5d is provided on the protruding portion 5b on the side of the second forming surface 5a, and the sliding contact surface 5d is continuous with the upper end side of the inclined surface 5c. That is, the sliding contact surface 5d is continuous with the side of the inclined surface 5c away from the block body 6a.

The second mold 5 is fixed to the lower surface of the lifting table 3, and as shown in FIGS. 5, the block body 6a is pivoted around the pivot axis C1 so that the positioning surface 6b approaches the first die 4 against the biasing force of the spring member 6e while sliding against the rod-shaped projection 6g of the block body 6a. It is made to move forward by rocking it.

Further, when the second mold 5 is lowered in a state in which the steel plate 10 is positioned with respect to the first mold 4 by the positioning surfaces 6b, the second molding surface 5a becomes the first molding surface as shown in FIG. The steel plate 10 is plastically deformed between the surface 4a and the press-formed body P1. It is configured to be in sliding contact with the rod-shaped projection 6g.

Next, a method for obtaining a press-formed body P1 from the steel plate 10 using the press-forming apparatus 1 will be described.

FIG. 1 shows a state in which a steel plate 10 having a predetermined outer shape is carried between a first mold 4 and a second mold 5 in an open state.

The steel plate 10 is dropped toward the first mold 4 from the state shown in FIG. Then, as shown in FIG. 2, the steel plate 10 is placed at an appropriate position on the upper surface of the first mold 4. Then, as shown in FIG. At this time, even if the input position of the steel plate 10 with respect to the first mold 4 deviates in the horizontal direction from the target position, each guide surface 6c slides the outer peripheral edge of the steel plate 10 to move the steel plate 10. It will guide you to the vicinity of the target position. In particular, in Embodiment 1 of the present invention, the block body 6a is swung so that the positioning surface 6b faces upward, and the guide surface 6c is positioned away from the first mold 4. Even if the input position of the steel plate 10 with respect to the mold 4 deviates greatly from the target position in the horizontal direction, the steel plate 10 can be guided to the vicinity of the target position. In this way, it is possible to prevent the equipment from being stopped because the steel plate 10 cannot be placed at the target position of the first mold 4 .

Next, after placing the steel plate 10 on the first mold 4, the lift table 3 is lowered (arrow X1). Then, after the inclined surface 5c of each protruding portion 5b of the second mold 5 comes into contact with the rod-shaped projection 6g of each positioning unit 6, the second mold 5 descends while slidingly contacting the rod-shaped projection 6g. The second mold 5 applies force to the block body 6a toward the first mold 4 side. Then, as shown in FIG. 3, the block body 6a moves forward by rocking around the rocking axis C1, and the positioning surface 6b pushes the steel plate 10 to a predetermined position to move it. The position of the steel plate 10 with respect to the first mold 4 is determined.

After that, the second mold 5 is further lowered. Then, as shown in FIG. A press-formed body P1 is obtained by plastically deforming along the first forming surface 4a. At this time, the vertically extending sliding contact surface 5d provided on the protruding portion 5b brings the rod-shaped projection 6g of the block 6a into sliding contact with the vertical direction, so that the block 6a is held in a constant posture and the positioning surface 6b is moved. It is maintained in a predetermined position. Therefore, press forming can be performed while the steel plate 10 is positioned at the target position in the first mold 4 .

After that, as shown in FIG. 5, the lift table 3 is lifted to separate the second molding surface 5a of the second mold 5 from the upper surface of the press-molded product P1 (arrow X2), and further, the block of each positioning unit 6 The work is finished when the body 6a is swung to the original position by the biasing force of the spring member 6e.

As described above, according to Embodiment 1 of the present invention, each positioning unit 6 is not structured to be operated by a fluid pressure cylinder, but is moved by being pushed by the second mold 5 by the downward movement of the second mold 5. Therefore, there is no need to manufacture a control device for controlling the fluid pressure cylinder so that it operates at an appropriate timing for the up-and-down operation of the second mold 5 as in Patent Document 1, and the manufacturing cost is reduced. can be prevented.

In addition, since each positioning unit 6 is not provided with a fluid pressure cylinder as in Patent Document 1, the press forming apparatus 1 can be horizontally compacted compared to the apparatus disclosed in Patent Document 1.

Furthermore, since the support frame 6f of the positioning unit 6 is structured to swingably support the block 6a, for example, compared to a structure in which the support frame 6f slidably supports the block 6a, It becomes difficult for dust or the like to accumulate between the support frame 6f and the block body 6a, so that the press molding apparatus 1 can be made less prone to failure.

In addition, since the block body 6a is biased by the spring member 6e so that the positioning surface 6b swings upward, the closing operation of the first mold 4 and the second mold 5 causes press molding. After molding the body P1, when the second mold 5 is lifted, the block body 6a moves to its original position due to the spring force of the spring member 6e. Therefore, the state of the press forming apparatus 1 can be quickly returned to a state in which the next press forming can be performed.

<<Invention Embodiment 2>>
FIG. 6 shows a press molding device 1 according to Embodiment 2 of the present invention. The second embodiment differs from the first embodiment only in a part of the structure of the positioning unit 6, and is otherwise the same as the first embodiment. Therefore, only the parts different from the first embodiment will be described in detail below.

A weight 6h (biasing means) having a rectangular parallelepiped shape is fixed to the rear lower portion of the block 6a in the second embodiment, and the weight 6h is a portion of the block 6a on the rear side of the swing axis C1. is set so that the front portion is heavier than the swing axis C1.

The weight 6h urges the rear side of the block 6a downward and abuts against the upper end of the base plate 6k to keep the block 6a in a swinging state so that the positioning surface 6b faces upward. It has become.

In addition, the method of obtaining the press-formed body P1 from the steel plate 10 using the press-forming apparatus 1 of the second embodiment is such that the block body 6a is swung to the side where the positioning surface 6b is separated from the first mold 4 and faces upward. Since it is the same as the first embodiment except that the means for urging the block body 6a is the weight body 6h, detailed description thereof will be omitted.

As described above, according to the second embodiment of the present invention, after the press-formed body P1 is formed by the closing operations of the first mold 4 and the second mold 5, when the second mold 5 is raised, the block body 6a The weight of the rear side causes the block body 6a to swing to its original position. Therefore, the state of the press-forming apparatus 1 can be quickly returned to a state in which the next press-forming can be performed without incurring parts costs as compared with the first embodiment.

<<Embodiment 3 of the invention>>
FIG. 7 shows a press molding device 1 according to Embodiment 3 of the present invention. The third embodiment is the same as the first embodiment except for the partial structure of the second mold 5 and the partial structure of the positioning unit 6, and the rest is the same as the first embodiment. Only the parts different from form 1 will be described in detail.

The protruding end of the protruding portion 5b of the second mold 5 in the third embodiment does not have the inclined surface 5c as in the first embodiment.

Further, the rod-like projection 6g as in the first embodiment is not provided on the rear upper portion of the block body 6a in the third embodiment.

On the other hand, in the upper rear portion of the block body 6a in the third embodiment, an inclined surface 6i is formed so as to be gradually inclined downward as the distance from the first mold 4 increases.

In the second embodiment, the rear end surface 6d of the block body 6a constitutes the sliding contact surface of the present invention. That is, the rear end surface 6d is continuous with the side of the inclined surface 6i away from the projecting portion 5b.

As the second mold 5 descends, the inclined surface 6i slides against the tip of the protruding portion 5b of the second mold 5 while resisting the biasing force of the spring member 6e. , the block body 6a is moved forward by rocking around the rocking axis C1.

Further, when the second mold 5 is lowered in a state in which the steel plate 10 is positioned with respect to the first mold 4 by the positioning surfaces 6b, the second molding surface 5a is positioned between the first molding surface 4a and the steel plate. A press-formed body P1 is obtained by plastically deforming the steel plate 10, and the rear end face 6d is configured to slide against the projecting portion 5b when the second forming surface 5a plastically deforms the steel plate 10.

In addition, in the method of obtaining the press-formed body P1 from the steel plate 10 using the press-forming apparatus 1 of Embodiment 3, when the second mold 5 is lowered, the block body 6a and the projecting portion 5b are in sliding contact with each other. Since it is the same as the first embodiment except for different parts, detailed description will be omitted.

As described above, according to the third embodiment of the present invention, even in the case where the block body 6a is provided with the inclined surface 6i instead of the projecting portion 5b with the inclined surface 5c as in the first embodiment, the structure is the same as that of the first embodiment. Positioning of the steel plate 10 can be reliably performed, and the compact and low-cost press forming apparatus 1 can be provided.

INDUSTRIAL APPLICABILITY The present invention is suitable for a press forming apparatus having a positioning unit that positions a material to be pressed before press forming.

REFERENCE SIGNS LIST 1 press molding device 4 first mold 4a first molding surface 5 second mold 5a second molding surface 5b projecting portion 5c inclined surface 6 positioning unit 6a block body 6b positioning surface 6c guide surface 6d rear end surface (sliding contact surface)
6e Spring member (biasing means)
6f support frame 6h weight (biasing means)
6i Inclined surface
10 Steel plate (pressed material)
C1 Oscillation axis P1 Press molded body

Claims (5)

a first mold having a first molding surface;
The press-formed body is formed by plastically deforming the material to be pressed placed on the first die between the first die and the first die by lowering the die. a second mold having a second molding surface to obtain;
A plurality of positioning units are arranged around the first mold at predetermined intervals and determine the position of the material to be pressed with respect to the first mold when the material to be pressed is placed on the first mold. and
The positioning unit includes a block body having a positioning surface for determining the position of the outer peripheral edge of the material to be pressed on the front side with respect to the first die, and supports the block body so as to be able to move forward and backward relative to the first die. a support frame; and biasing means for biasing the block body toward the side where the positioning surface separates from the first mold;
The block body is configured such that its longitudinal direction extends in the vertical direction,
The second mold is provided with a plurality of protrusions that protrude downward and whose protruding ends are positioned below the second molding surface at positions corresponding to the respective positioning units,
Either one of the block body and the projecting part has an inclined surface that is inclined so as to be positioned gradually downward as it separates from the first mold, and from the other one of the block body and the projecting part on the inclined surface and a vertically extending sliding contact surface continuously provided on the remote side,
As the second mold descends, the inclined surface is in sliding contact with the other of the block body and the protruding portion, and the positioning surface resists the urging force of the urging means so that the positioning surface moves toward the first mold. configured to advance the block body so as to approach
The sliding contact surface is configured to come into sliding contact with the other of the block body and the projecting portion when the second forming surface plastically deforms the pressed material ,
The support frame pivotally supports the intermediate portion of the block body so as to be able to swing about a swing axis extending in a horizontal direction perpendicular to the front-rear direction of the block body,
The urging means urges the block body to swing toward the upward facing side of the positioning surface,
The press molding apparatus, wherein the block body is configured to move forward and backward with respect to the first mold by rocking about the rocking axis . In the press molding apparatus according to claim 1,
The support frame includes a horizontally extending base plate and a support portion projecting upward from a middle portion of the base plate,
The upper end portion of the support portion pivotally supports the lower middle portion of the block body on the side of the first mold from the projecting portion in the horizontal direction so as to be able to swing about the swing axis . Characteristic press molding equipment. In the press molding apparatus according to claim 1 or 2,
A press molding apparatus, wherein a guide surface extending obliquely so as to be positioned downward toward the first mold side and connected to the positioning surface is provided on the front upper portion of the block body. In the press molding device according to claim 2 ,
The biasing means is a spring member ,
The press molding apparatus, wherein the spring member is arranged closer to the first mold than the projecting portion and the supporting portion in a horizontal direction . In the press molding apparatus according to claim 1 ,
The urging means is attached to the rear side of the block body, and the weight is set so that the rear side portion of the block body relative to the swing axis is heavier than the front side portion of the swing axis. A press molding device characterized by being a body.

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