JPH05104171A - Thin sheet press forming machine and method for joining thin metal sheet by using this machine - Google Patents

Abstract

PURPOSE:To improve the working efficiency in the caulking of a metal plate by lock-seaming the end part of the metal plate in the forward direction and caulking it at the time of movement in the backward direction. CONSTITUTION:The end part of the metal plate for a working material is inserted into the inside of work inserting spaces 12a, 12b and provided at a prescribed position abuting on a recessed groove 3 of an inner punch 2 and a recessed groove 6 of an outer punch 5. A center punch 8, an inner clamp punch 4 and an inner punch 2 move and the end part of the metal plate projecting into the recessed groove 6 of the outer punch 5 and the recessed groove 3 of the inner punch 2 is bent nearly in the rectangular direction. The inner clamp punch 4 and the outer clamp punch 7 move back to the reset position and the outer punch 5, the center punch 8 and the inner punch 2 move as far as the final positions. Both ends of the metal plate are caulked under this state. The subsidiary pressurizing body moves according to the thickness of the caulked part. In this way, the pressurizing force applied on the pressurizing body is reduced and the capacity of a hydraulic cylinder is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a thin plate pressure molding machine for caulking and joining end surfaces of can-making parts.

[0002]

2. Description of the Related Art Conventionally, in a can-making component or the like, a method of caulking both ends of a metal plate and joining them is generally performed. 11 to 14 are process diagrams showing a conventional caulking process of a metal plate. Conventional caulking is mainly a seam folding process that bends the end of the metal plate.
The caulking process is performed by joining both ends of the folded and folded metal plate together. That is, first, as shown in FIG. 11, the metal plates 14a and 14b are installed at predetermined positions between the lower mold 21 and the upper mold 20 for pressure molding. A metal plate 14 is provided on the joint surface between the lower mold 21 and the upper mold 20.
V-shaped grooves are formed for bending the ends of a and 14b in opposite directions.

Next, as shown in FIG. 12, the upper die 20 is lowered, and pressure is applied to the lower die 21, so that both end portions 14a of the metal plate,
14b is folded and folded.

Next, the caulking process is started. In the crimping step, a pressure mold different from that used in the above-mentioned folding step is used. The lower mold 23 supports the end portion 14b of one metal plate,
A movable support 24 is formed by a spring and is movable. The upper die 22 is formed with a recess for accommodating the crimped portion. Then, the bent pieces of the metal plates 14a and 14b, which have been subjected to the folding process, are set so as to be engaged with each other and set on the surface of the lower mold 23.

Then, as shown in FIG. 14, the upper mold 22 is lowered and pressed. As a result, the ends of the metal plates 14a and 14b are caulked.

[0006]

However, in the conventional caulking process, the crimping process and the caulking process are separately performed, and it is necessary to use different pressurizing dies for each process. For this reason, there is a problem that the processing time is long and the equipment cost is increased because a plurality of molds are required. Furthermore, the mounting operation of the metal plate from the folding process to the caulking process is performed manually, and the work efficiency is low.

Therefore, the present invention has been made in order to solve the above problems, and provides a thin plate pressure forming machine capable of continuously performing a folding process and a caulking process. With the goal.

[0008]

SUMMARY OF THE INVENTION The thin plate pressure forming machine of the present invention is one in which end portions of a work material such as a metal plate are folded and folded, then caulked and joined. Then, a first pressure body and a second pressure body that sandwich the front surface and the back surface of one end of the work material, and a third pressure body and a fourth pressure body that sandwich the front surface and the back surface of the other end of the work material. It has a body. The first pressure member and the second pressure member have a first reference surface and a second reference surface that extend parallel to each other with a predetermined distance therebetween and that define the width of the joint portion of the workpieces. is doing. The fourth pressure body is arranged so as to be relatively movable along the first reference plane of the first pressure body, and the second pressure body is relatively moved along the second reference plane of the third pressure body. It is arranged as possible.
Further, the first pressurizing body receives the tip end portion of the other end of the work material held between the fourth pressurizing body and the third pressurizing body, and receives the first processed body, the fourth processed body, and the third processed body. And the relative movement of the concave portion formed to bend the tip of the work piece and the first reference surface so as to project and move so that the bent tip of the work piece has a sharper angle. And a protrusion having an abutment surface for folding back. The third pressure body receives the tip end portion of one end of the work material held between the first pressure body and the second pressure body, and receives the third pressure body, the first pressure body, and the second pressure body. The concave portion for bending the tip of the work piece by the relative movement of the pressure body and the projecting movement from the second reference surface are formed so that the bent tip of the work piece has a sharper angle. And a protrusion having an abutting surface for folding back.

A method for joining metal thin plates using a thin plate pressure forming machine is performed as follows. One end of the metal plate is the first
It is sandwiched between the pressure body and the second pressure body, and the tip portion thereof projects into a recess formed in the second reference surface of the third pressure body.
Further, the other end of the metal plate is sandwiched between the third pressure body and the fourth pressure body, and the tip portion thereof projects into the recess formed in the first reference surface of the first pressure body. In this state, the first pressing body and the second pressing body that hold one side of the metal plate and the third processed body and the fourth processed body that hold the other side of the metal plate are relatively moved in the forward direction. As a result, the tip of the held metal plate is bent at a right angle.

Next, the protrusion of the first pressure body is projected from the first reference surface, and the protrusion of the third pressure body is projected from the second reference surface. Then, it is relatively moved in the opposite direction to the above.
By this step, each of the tips of the metal plates bent at right angles comes into contact with the contact surface of the projecting body of the first pressurizing body and the contact surface of the projecting body of the third pressurizing body so that they are in an acute angle direction. Can be folded into

Further, the same relative movement as described above is performed while retracting the projecting body of the first pressing body and the projecting body of the third pressing body from their respective reference planes. As a result, the tip ends of the metal plates bent to each other are caulked and joined.

As described above, the folding process and the caulking process are continuously performed by one reciprocal movement of the first pressure member and the second pressure member and the third pressure member and the fourth pressure member. Be done.

[0013]

The thin plate press forming machine according to the present invention comprises a pair of pressurizing bodies for holding one end of metal plates to be joined to each other and a pair of pressurizing bodies for holding the other end. Since it is configured to be relatively moved in the forward direction and the reverse direction with respect to each other, the end portion of the metal plate is folded and folded in the forward direction, and the caulking process is performed when moving in the reverse direction. In the continuous operation of 1, the end faces of the metal plates can be joined by performing the folding process and the caulking process, and the processing efficiency of the caulking process of the metal plate can be improved.

[0014]

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

FIG. 1 is a plan structural view showing a pressing mechanism portion of a thin plate press forming machine according to an embodiment of the present invention, and FIG. 2 shows a cylindrical metal plate 14 in the thin plate press forming machine. It is a plane structure figure showing the state where it was equipped.

The thin plate forming machine is movably attached to the die 1 fixed to the base, the outer punch 5, the center punch 8, the inner punch 2 for performing the pressing operation, and the outer punch 5. An outer clamp punch 7 and an inner clamp punch 4 movably attached to the inner punch 2 are provided. The outer punch 5 has the first reference surface 5a and the first reference surface 5a.
A concave groove 6 is formed in a and used for folding the end surface of the metal plate.

The outer punch 5 is provided with a hydraulic cylinder 10d for advancing / retracting with respect to the die 1 along the extending direction of the first reference surface 5a. Further, an outer clamp punch 7 is attached to the outer punch 5 so as to be movable at an angle of about 45 ° with respect to the first reference surface 5a. The outer clamp punch 7 is driven by the hydraulic cylinder 10c. In the reset state of the apparatus, the workpiece insertion space 12 for inserting the end face of the metal plate between the clamp surface 7a of the outer clamp punch 7 and the surface 1a of the die 1
a is configured.

The inner punch 2 is the first reference surface 5a of the outer punch 5.
And a second reference surface 2a extending in parallel at a predetermined distance. As will be described later, the first reference surface 5a and the second reference surface 5a
The distance from the reference surface 2a is set so as to define the width of the caulked portion of the joined portion of the metal plates. On the second reference surface 2a of the inner punch 2, a concave groove 3 that functions similarly to the concave groove 6 of the outer punch 5 is formed. Further, the inner punch 2 is provided with an inner clamp punch 4 which is movable along an inclined surface formed at an angle of about 45 ° with respect to the second reference surface 2a. The inner clamp punch 4 is driven by the hydraulic cylinder 10b. Clamping surface 4a of inner clamp punch 4
A workpiece insertion space 12b into which the end of the metal plate is inserted is formed between and the pressing surface 8a of the center punch 8.

The center punch 8 is provided with a sub-pressurizing member 9 whose surface is aligned with the pressing surface 8a of the center punch 8 and which is retracted so as to accommodate the caulked portion of the metal plate in the final step of caulking. There is. The sub pressurizing body 9 is pressed and supported by the spring 11 against the center punch 8. The center punch 8 and the inner punch 2 are hydraulic cylinders 10e,
It is driven by 10a.

Referring to FIG. 2, when the end faces of the cylindrical metal plate 14 are caulked and joined together, the metal plate 14 is
The fixed die 1 is mounted in the device so that it is positioned.

Next, the operation of this thin plate forming machine will be described. 3 to 7 are plan views showing an operating state in the caulking process using the thin plate press forming machine.

First, as shown in FIG. 3, the end portions 14a and 14b of the metal plate, which is the workpiece, are inserted into the workpiece insertion space 12a.
It is inserted into the inside of 12b, and is attached to a predetermined position where it abuts on the concave groove 3 of the inner punch 2 and the concave groove 6 of the outer punch 5.

Next, as shown in FIG. 4, the outer clamp punch 7 and the inner clamp punch 4 advance in the direction of the arrow, and the end 14a of the metal plate is placed between the outer clamp punch 7 and the die 1.
And the other end 14b of the metal plate is clamped between the inner clamp punch 4 and the center punch 8.

Further, as shown in FIG. 5, the center punch 8, the inner clamp punch 4 and the inner punch 2 move in the direction of arrow A with the other end 14b of the metal plate being held. At this time, the concave groove 6 of the outer punch 5 and the concave groove 3 of the inner punch 2
The tip of the metal plate protruding inward is bent at a substantially right angle.

Further, as shown in FIG. 6, the center punch 8, the inner clamp punch 4 and the inner punch 2 move in the direction of arrow B while holding the end portion 14b of the metal plate. At this time, the inner clamp punch 4 retracts at the same time.
The outer punch 5 also moves in the direction of arrow B, and the outer clamp punch 7 retracts. By such an operation, the tip ends of the end portions 14a and 14b of the metal plate bent substantially at right angles are bent more acutely.

Then, as shown in FIG. 7, the inner clamp punch 4 and the outer clamp punch 7 retract to the reset position, and the outer punch 5, the center punch 8 and the inner punch 2 move to the final position in the direction of arrow B. To do. In this state, both ends 14a and 14b of the metal plate are crimped. Then, depending on the thickness of the crimped portion, the sub-pressurizing body 9 is moved to the arrow A
Move in the direction.

After that, the outer punch 5 and the center punch 8
Moves in the direction of arrow A to enter the reset state shown in FIG.

Here, the steps shown in FIG. 6 and FIG.
It will be described in detail with reference to FIGS. 8 to 1
0 is an enlarged view showing a forming state of the tip portion of the metal plate in the crimping process. The state shown in FIG. 8 now corresponds to FIG. Then, when the inner clamp punch 4 and the outer clamp punch 7 retract from this state, the center punch 8 and the inner punch 2 move in the direction of arrow B, and the outer punch 5 also moves in the direction of arrow B, as shown in FIG. In addition, there is a positional relationship such that the sharply bent tip portions of both ends 14a and 14b of the metal plate mesh with each other. Further, when the pressing operation proceeds, as shown in FIG. 10, the tip portions are pressed together to complete the caulking process. At this time, the sub-pressurizing body 9 retracts from the pressing surface 8a of the center punch 8 by an amount corresponding to the thickness of the caulked portion. Also, the joining width L of the caulked portion
Is defined by the distance between the first reference surface 5a of the outer punch 5 and the second reference surface 2a of the inner punch. Therefore, always
Caulking is performed with a constant joint width.

In the above-described embodiment, the molded product formed into a cylindrical shape is formed so that the joined portion of the caulking portion projects on the outer surface of the formed product. In FIG. 2, the outer punch is formed inside the metal plate 14. If the metal plate 14 is attached so that the 5 and the center punch 8 are positioned, the caulking portion can be formed so as to project inward.

Further, in the above embodiment, the outer punch 5
The distance from the tip of the first reference surface 5a to the groove 6 is equal to the distance from the tip of the second reference surface 2a of the inner punch 2 to the groove 3. For this reason, in the folding process shown in FIG. 5, the one end portion 14a and the other end portion 14b of the metal plate are simultaneously folded. However, by shifting the positions of the concave groove 6 and the concave groove 3 from each other, it is possible to perform the folding process on one of the ends and then perform the folding process on the remaining ends. You can According to this structure, the pressure applied to the pressurizing body can be reduced and the capacity of the hydraulic cylinder can be reduced.

Further, in the above embodiment, the plurality of punches are driven by using the hydraulic cylinder, but the present invention is not limited to this, and a cam or the like may be used.

[Brief description of drawings]

FIG. 1 is a plan structural view of a thin plate pressure molding machine according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state in which a metal plate is mounted on the thin plate pressure molding machine shown in FIG.

FIG. 3 is a plan view showing a first step of joining metal plates using a thin plate pressure molding machine.

FIG. 4 is a plan view showing a second step of joining the metal plates.

FIG. 5 is a plan view showing a third step of joining the metal plates.

FIG. 6 is a plan view showing a fourth step of joining the metal plates.

FIG. 7 is a plan view showing a fifth step of joining the metal plates.

FIG. 8 is a first enlarged view of the joining process of the metal plates shown in FIG.

9 is a second enlarged view showing a state of joining processing of the metal plates shown in FIGS. 6 to 7. FIG.

10 is a third enlarged view showing details of the joining process of the metal plates shown in FIG.

FIG. 11 is a sectional structural view showing a first step of the conventional joining process of metal plates.

FIG. 12 is a sectional structural view showing a second step of the conventional joining process of metal plates.

FIG. 13 is a sectional structural view showing a third step of the conventional joining process of metal plates.

FIG. 14 is a sectional structural view showing a fourth step of the conventional joining process of the metal plates.

[Explanation of symbols]

 1 Die 2 Inner Punch 2a Second Reference Surface 3 Recessed Groove 4 Inner Clamp Punch 5 Outer Punch 5a First Reference Surface 6 Recessed Groove 7 Outer Clamp Punch 8 Center Punch

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[Procedure amendment]

[Submission date] October 24, 1991

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 7

[Correction method] Change

[Correction content]

[Figure 7]

Claims (4)

[Claims] 1. A thin plate pressure molding machine for crimping and joining end portions of a work material such as a metal plate after crimping, the surface of one end of the work material. And a first pressure body and a second pressure body that hold the back surface, and a third pressure body and a fourth pressure body that hold the front surface and the back surface of the other end of the workpiece, the first pressure body and the second pressure body. The pressurizing body and the third pressurizing body have a first reference surface and a second reference surface that extend parallel to each other with a predetermined distance therebetween and that define the width of the joint portion of the workpieces. The fourth pressure body is arranged so as to be relatively movable along the first reference surface of the first pressure body, and the second pressure body is the second reference body of the third pressure body. The first pressurizing body is disposed so as to be relatively movable along a surface, and the first pressurizing body is a member other than the work material held by the fourth pressurizing body and the third pressurizing body. A recess for receiving the tip of the end and bending the tip of the workpiece by the relative movement of the first pressure body, the fourth pressure body, and the third pressure body; A protrusion having a contact surface for movably projecting from the first reference surface and for bending the bent tip of the workpiece to a more acute angle, the third pressing member The body receives the tip end portion of one end of the work material held between the first pressure body and the second pressure body, and receives the third pressure body, the first pressure body, and the second pressure body. A recess for bending the tip of the workpiece by relative movement of the pressure body, and a bent tip of the workpiece formed so as to project from the second reference surface are formed. Further, a thin plate pressure molding machine having a protrusion having an abutment surface for folding back at an acute angle. 2. The projecting body of the first pressurizing body is the second projecting body.
A pressurizing surface facing the pressurizing body, wherein the contact surface is
It is formed so as to project obliquely with respect to the first reference surface, and the projecting body of the third pressing body further includes a pressing surface facing the fourth pressing body, and the abutting surface. The thin plate pressure molding machine according to claim 1, wherein is formed so as to project obliquely with respect to the second reference surface. 3. The thin plate pressure molding machine comprises a base on which the first pressure body, the second pressure body, the third pressure body and the fourth pressure body are mounted. The second pressure body is fixed to the base,
The thin plate press molding machine according to claim 1. 4. A thin metal plate to be joined with the first reference surface.
A recess that receives the tip of the
A first pressurizing body having an active protrusion, a second pressurizing body arranged to face the first pressurizing body, a second reference surface, and a tip portion of a thin metal plate to be joined.
Recess for receiving and projecting body capable of projecting from the second reference surface
A thin plate having a third pressurizing body having a third pressurizing body, and a fourth pressurizing body facing the third pressurizing body.
It is a method of joining thin metal plates using a pressure forming machine.
So that one end of the thin metal plate is projected into the recess of the first pressure body.
In the state where the metal thin film is
Hold one end of the plate and attach the other end of the thin metal plate to the first
3. The third pressurizing body in a state of being projected into the recess of the pressurizing body.
And holding the other end of the thin metal plate by the fourth pressure member,
The third pressure member and the fourth pressure member are connected to the first pressure member.
And by moving relative to the second pressure body.
Thus, the recess of the first pressure body and the third pressure body
At a right angle to the tip of the thin metal plate protruding into the recess
After being bent into, the third pressure body and the fourth pressure body are
The metal thin film bent while being relatively moved in the original direction
The tip of the plate is connected to the protrusion of the first pressure body and the first pressure body.
2 By contacting the protruding body of the pressure body,
While bending at an acute angle, engage the tips with each other, and
Each of the protrusions of the first pressure body and the third pressure body is
And retreat into the first reference plane and the second reference plane, respectively.
At the same time, the fourth pressure body and the second pressure body
Bonding the bent parts of the thin metal plates, joining the thin metal plates, gold
Method of joining thin metal plates.