JP3003427B2 - Necking molding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a necking apparatus for drawing and flanging cylindrical cans used for beverages and the like, and more particularly to a necking apparatus suitable for test processing.

[0002]

2. Description of the Related Art In general, one end of a cylindrical can filled with a beverage or the like is subjected to so-called necking and flanging, which are squeezing for attaching a lid and expanding the diameter. Conventionally, these necking moldings are, for example, formed into a three-stage drawing portion and a flange portion whose peripheral edge is expanded in a flange shape, but all these processes are provided in multiple stages in a can production line. And a plurality of molds.

In recent years, various types of cans have been manufactured from the viewpoints of diversification, design, economy and the like of the filling material. When manufacturing such a new container, the size and material of the can and the thickness of the can are determined. Processing conditions including the shape of the mold must be set, and test processing is also performed on necking molding before manufacturing on line. Alternatively, it is necessary to perform various kinds of test processing even when changing the production line or improving a defect.

[0004] However, when performing such test processing, there is no simple forming apparatus for performing necking forming on a prototyped can, and test processing is performed by using a part of a processing line. It was a big deal. Therefore, there has been a demand for a molding apparatus for performing a test suitable for a production line.

For this reason, the applicant of the present invention has proposed a neck forming apparatus capable of easily performing neck forming on individual cans in order to set and improve processing conditions such as the shape of a mold ( See Japanese Patent Application No. 4-50026).

That is, this necking forming apparatus is a necking forming apparatus for performing drawing or flanging on one end of a cylindrical can, and a chuck mechanism for supporting the other end of the can and a chuck mechanism for supporting the other end. A cylindrical spindle housing provided on the same axis as the one end of the can supported by a mechanism, and a guide block shaft inserted through the spindle housing are provided. Is
A necking die formed in an annular body and having an inner peripheral surface which is reduced in diameter as being separated from the one end of the can and which is fitted to the one end of the can from the outer peripheral side and which is subjected to the drawing process; Alternatively, a flange formed in an annular body and having an outer peripheral surface which is enlarged in diameter as being separated from the one end of the can and which is fitted to the one end of the can from the inner peripheral side and is subjected to the flanging process When the drawing process is performed, a guide die is attached to the end of the guide block shaft and is fitted into the one end of the can from the inner peripheral side to hold the one end. A block is attached, and the spindle housing and the guide block shaft are respectively provided so as to be able to advance and retreat along the axis.

[0007]

However, the present invention has a problem that when the necking die or the flanging die is replaced, the chuck mechanism is in the way and the workability of the setup work is poor.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a necking forming apparatus capable of improving the workability of a setup operation of a necking operation.

[0009]

According to the necking forming apparatus of the present invention, a necking forming apparatus for drawing or flanging one end of a cylindrical can,
A holding mechanism that supports the other end of the can, a cylindrical spindle housing provided on the same axis as the one end of the can supported by the holding mechanism, and is inserted through the spindle housing. A guide block shaft is provided, and at the tip of the spindle housing, the diameter is reduced as the annular shape is formed and the inner peripheral surface is separated from the one end of the can. A necking die that fits from the outer peripheral side and performs the drawing process on this, or formed in an annular body, and has an outer peripheral surface whose diameter is increased as it is separated from the one end of the can, and is attached to the one end of the can. A flanging die that fits from the inner peripheral side and performs the flanging process is attached thereto, and the drawing process is performed on the tip of the guide block shaft. At this time, a guide block which is formed in an annular shape and is fitted to the one end of the can from the inner peripheral side to hold the one end is attached, and the spindle housing and the guide block shaft are each The holding mechanism is provided so as to be able to advance and retreat along the axis, and the holding mechanism is provided so as to be able to advance and retreat along the axis of the spindle housing, and a fixing member for fixing the spindle at a predetermined distance with respect to the spindle housing is provided. Features.

[0010]

When the other end of the can to be processed is supported by the holding mechanism, a spindle housing and a guide block shaft inserted through the spindle housing are provided on the same axis.
When drawing is performed on one end of the can, a necking die is attached to a spindle housing and a guide block is attached to a guide block shaft in advance.

Since the spindle housing and the guide block shaft are respectively provided so as to be able to advance and retreat along the axis, they are advanced toward one end of the can to press the one end to perform drawing. . At this time, the necking die attached to the tip of the spindle housing is formed in an annular body, and the diameter thereof is reduced as the inner peripheral surface is separated from the one end of the can. When this is pressed and compressed, a narrow neck is formed at one end of the can. The guide block attached to the tip of the guide block shaft is formed in an annular body, and is fitted to one end of the can from the inner peripheral side to hold the one end when drawing by a necking die. I do.

On the other hand, in the flanging process, a flanging die is attached to the tip of the spindle housing, the spindle housing is advanced toward one end of the can, and the one end is pressed to perform the flanging process. At this time, the flanging die is formed in an annular body and the outer peripheral surface is enlarged as the outer surface is separated from one end of the can.
A flange is formed at one end of the can.

When the necking die or the flanging die is attached, the holding mechanism is retracted along the axis of the spindle housing in a direction away from the spindle housing. As a result, a large space is formed between the holding mechanism and the spindle housing, the work of removing or attaching the necking die or the flanging die is facilitated, and the workability of the setup work is significantly improved. When necking or flanging is performed, the holding mechanism is advanced toward the spider housing, and when a predetermined distance from the holding mechanism is reached, the holding mechanism is fixed by a fixing member. Thereby, desired flanging processing or necking processing can be performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a necking device according to the present invention (hereinafter referred to as the present device) will be described with reference to FIGS.

FIG. 1 is a plan view of the apparatus, and FIG. 2 is a side view thereof. According to the apparatus, the apparatus includes a necking mechanism F for performing necking at one end of a cylindrical can C.
1, driving means F3 for driving the necking mechanism F1,
And a holding mechanism F2 that supports an end (hereinafter, referred to as the other end) opposite to the one end where the processing of the can C is to be performed during the processing.

The details will be described below.
Has a stand 29 provided on the base 1 of the present apparatus, into which the can C is charged substantially horizontally, and a chuck 20 for adsorbing the other end of the charged can C by negative pressure. These configurations are shown in FIG. 4 which is a side sectional view and FIG. 5 which is a front view. The stand 29 has substantially the same outer diameter as the can C in order to support the body of the can C from below. A pair of plate bodies each having a concave portion having a diameter are provided upright.

The chuck 20 comprises a pad 21 with which the bottom of the can C contacts, and a holder 22 for holding the pad 21. The suction penetrates the pad 21 and the holder 22 to suck the can C. A passage 23 is formed, and a negative pressure generator (not shown) is connected to the suction passage 23. The holder 22 is fixed on a slide plate 24, and the slide plate 24 is placed on a guide rail 27 provided on the base 1 via a leg 24a provided on the bottom thereof. ing. A long hole 24c is formed in a side portion of the slide plate 24, and a clamp screw 24b having a threaded portion at its tip is attached through the through hole 24c.
The threaded portion b is screwed into a threaded portion formed on the base 1.

A load cell 26 is interposed between the holder 22 and a flange formed on the periphery of the pad 21. This is for measuring the axial pressing force of the can C applied by the load cell 26 at the time of necking molding.

On the other hand, as shown in FIGS. 1 and 2, the necking mechanism F1 for necking the one end of the can C is formed on the same axis as the can C inserted into the stand 29 of the holding mechanism F2. A spindle housing 10 provided on the base 1 and having a necking die 12 or a flanging die 50 (illustrated in FIG. 7) attached to a tip thereof, and a guide block shaft 16 to which a guide block 18 is attached during necking. I have.

FIG. 3 shows a side cross section of the necking mechanism F1. The spindle housing 10 has a substantially cylindrical shape, and a flange is formed on a tip end side facing the can C. Further, a cylindrical housing 10b having a flange formed on the outer peripheral side is provided at the end where the flange is formed. The spindle cell 10 and the housing 10b are connected to each other with a load cell 15 interposed between the flanges. That is, the spindle housing 10 can be
When pressed toward one end, the total pressing force in the axial direction is detected.

For example, in the necking process,
The necking die 12 shown in FIG. 3 is attached to the tip of the housing 10b. For this reason, the end of the housing 10b on the can C side is stepped on the outer peripheral surface along the circumferential direction, The necking die 12 is fixed in the radial direction.

An annular clamp ring 11 is screwed around the outer periphery of the housing 10b. The clamp ring 11 is formed such that the inner peripheral surface thereof is stepped, and the necking die 12 to be attached is pulled toward the housing 10b in the axial direction and fixed so as to be tightened in the housing 10b.

The end of the spindle housing 10 on which the housing 10b and the clamp ring 11 are attached via the load cell 15 on the side opposite to the can C has a part of its outer peripheral wall extending in the axial direction and its tip end. Is provided with a cam follower 14.

The necking die 12 is formed in an annular body, and has a diameter which is reduced as the inner peripheral surface is separated from one end of the can C. The necking die 12 is a mold in which the inner peripheral surface of the end on the can C side is narrowed down to, for example, three steps according to the necking shape, and is provided on the inner peripheral edge of the end on the opposite side to the can C. The stepped portion is engaged with the distal end portion of the housing 10b, and the stepped portion provided on the outer peripheral surface is locked by the clamp ring 11.

On the other hand, as shown in FIG. 7, a flanging die 50 used when performing flanging processing is
An annular mold, the tip of which is fitted into one end of the can C from the inner peripheral side and is subjected to flanging, and the outer diameter increases as the outer peripheral surface is separated from the one end of the can C. Have been.

The guide block shaft 16
Is a shaft to which the guide block 18 is attached at the time of necking, and whose shaft center is formed hollow. The elastic member 13 is inserted slidably through the axis of the spindle housing 10. The elastic member 13 complements the driving means F3 to facilitate the operation of the spindle housing 10 and the guide block shaft 16.

An adapter 17a is attached to the end of the guide block shaft 16 on the can C side. The adapter 17a connects the guide block 18 attached at the time of necking to the guide block shaft 16
For holding the tip at a predetermined position, the shaft center is formed hollow, and near the end on the side of the can C, the outer periphery is stepped, and the guide block 18 is fitted to the outer periphery. It is made to be made.

The end of the guide block shaft 16 opposite to the can C is formed so as to protrude from the spindle housing 10, and a cam follower 19 is provided on the protruded end via a slide bar 16b. .

By the way, as shown in FIG. 3, the guide block 18 is inserted into one end of the can C and holds the one end from the inner peripheral side during the working, when performing drawing. It is formed in an annular body, and a stepped portion is provided on the inner peripheral surface.

When the guide block 18 is mounted on the guide block shaft 16, a retaining ring 17b is inserted into the cylinder of the guide block 18, and is fixed to the guide block shaft 16 using mounting bolts 17c. It has become.

Further, the guide block shaft 16 is also formed so that its axial center is hollow,
A compressed air introduction port 16c is provided at the protruding end opposite to the can C in order to introduce the compressed air into 6. And
The mounting bolt 17 for fixing the guide block 18
c, a nozzle 17f, which is a through hole, is formed in the axial center portion, and compressed air is supplied into the can C during necking molding,
Helps maintain the outer shape of can C during molding, and can C after molding
From the necking die 12 is promoted.

As shown in FIGS. 1 and 2, a driving means F3 for driving the forming mechanism F1 having the above-described structure includes a driving shaft 30 provided orthogonal to the axis of the forming mechanism F1. , A motor 40 and a clutch brake unit 42.

The drive shaft 30 has bearings 31 and 3 at both ends.
A pair of cams rotatably supported by and facing each other across the axis of the molding mechanism F1 are mounted. One of these cams is a necking cam 3 with which a cam follower 14 provided on the spindle housing 10 engages.
The other is a guide block cam 34 with which a cam follower 19 provided on the guide block shaft 16 is engaged. 3, the necking cam 32 and the guide block cam 34 are partially shown in FIG.
The cam surface 32c and the cam surface 34c are formed by grooves provided on each panel surface.

The cam surface 32c and the cam surface 34c are formed such that the distances from the center of the drive shaft 30 are shifted from each other in phase as shown in the drawing operation of the necking die 12 and the guide block 18 in FIG. Have been. FIG. 8 shows the relationship between the rotation of the necking cam 32 and the guide block cam 34 and the distance from the drive shaft 30 to each of the cam surfaces 32c and 34c formed thereon.

According to this, the solid line indicates the distance from the drive shaft 30 to the cam surface 32c, and the broken line indicates the distance from the drive shaft 30 to the cam surface 34c. That is, the drive shaft 3
The distances L1 to L2 from the drive shaft 30 according to the rotational positions θ (0) to θ (7) of 0 are the positions where the position of the symbol L1 is closest to the drive shaft 30 and the position of the symbol L2 is the most distant. It has become. In addition, the solid line shows the positional relationship between one end of the can C and the necking die 12 (spindle housing 10), and the broken line shows the positional relationship with the guide block 18 (guide block shaft 16).

The drive shaft 30 to which such a pair of cams are attached is rotated by a motor 40.
The drive shaft 30 and the motor 40 are connected via a clutch brake unit 42 including a V-belt 41. The clutch brake unit 42 connects the rotation of the motor 40 to the drive shaft 30 and causes the cam to rotate only once for the flywheel that rotates continuously.

That is, in the driving means F3,
The guide block shaft 16 is advanced toward one end of the can C supported by the holding mechanism F2 to advance the guide block 18, and when the guide block 18 is fitted to one end of the can C, the spindle housing 10 To move the necking die 12 close to the one end so as to be fitted thereto, and further, when the necking die 12 is fitted to the one end, the guide block shaft 16 is retracted to retreat the guide block 18 from the one end. It is to let.

Next, the operation when necking molding is performed on the can C by the present apparatus configured as described above will be described with reference to FIGS. 6, 7 and 8 showing the molding process.

First, a procedure of a so-called setup operation for attaching the necking die 12 or the flanging die 50 to the spindle housing 10 will be described. Knob 41
At the same time, the stopper 40 is rotated around the hinge 42 and flipped up, and at the same time, the clamp screw 24b is loosened and the slide plate 24 is retracted along the guide rail 27, and the stand 29 and the chuck 20 and the forming mechanism F1 are So that a large space is formed between them. Since a large gap is formed in this manner, the stand 29 and the chuck 20 do not hinder the attachment of the necking die 12 or the flanging die 50, and these can be attached with good workability.

Next, the slide plate 24 is advanced along the guide rail 27, and the spindle housing 10 is moved.
The distance between the necking die 12 or the flanging die 50 attached to the pad 20 and the pad 21 of the chuck 20 is set to a predetermined value. Then, close the clamp screw 24b,
The slide plate 24 is fixed to the base 1. Thus, the setup work is completed.

Next, a procedure for necking or flanging the can C will be described.

First, the can C is placed on the stand plate 29,
The can C is held by applying a negative pressure to the bottom of the can C from the suction passage 23 (see FIG. 6A).

Next, as shown in FIG. 3, the necking die 12 and the guide block 18 are initially mounted on the forming mechanism F1 to perform drawing. Then, when the driving means F3 for driving the forming mechanism F1 is operated, the drive shaft 30 starts rotating through the clutch brake unit 42.

The drive shaft 30 is provided with a pair of necking cams 32 and guide block cams 34. The cam surfaces 32c and 34 formed on the necking cams 32 and the guide block cams 34, respectively.
cam follower 14 attached to spindle housing 10 and guide block shaft 16 along
And the cam follower 19 starts moving in the axial direction.

The cam surface 32c and the cam surface 34c are shown in FIG.
, The rotational positions θ (0) to θ of the drive shaft 30
In accordance with (7), the distances L1 and L2 from the drive shaft 30 are set to be shifted in phase. First, the rotational position θ of the drive shaft 30 (necking cam 32, guide block cam 34) is set.
In (0), both the spindle housing 10 and the guide block shaft 16 are closest to the drive shaft 30 and are farthest from one end of the can C.

Then, the drive shaft 30 rotates and the rotational position θ
The guide block shaft 16 starts moving forward from (0) to the rotation position θ (1), and when the drive shaft 30 rotates to reach the rotation position θ (1), the spindle housing 10 starts to move forward. I do. At this time, the elastic member 13 is inserted in the cylinder of the spindle housing 10, and when the spindle housing 10 starts to move forward following the guide block shaft 16 that has moved forward, the guide block shaft 16 moves forward. Due to the restoring force of the extended elastic member 13, the cam follower 14 is always pressed along one surface of the cam groove so that the cam follower 14 operates smoothly.

Next, when the drive shaft 30 reaches the rotation position θ (2), the guide block shaft 16 projects most and the guide block 18 is fitted to one end of the can C on the inner peripheral side.
At this time, the spindle housing 10 is moving forward, and the necking die 12 at the tip is slightly fitted to the outer peripheral side of one end of the can C (see FIG. 6B).

Then, while the drive shaft 30 moves from the rotational position θ (2) to the rotational position θ (3), the spindle housing 10 is further advanced, and the necking die 12 is fitted to one end of the can C. The drawing process is performed on the one end. Further, as the necking die 12 performs drawing, the guide block shaft 16 becomes θ (2).
, The guide block 18 retreats abruptly from θ (5), and retreats to near the open portion of one end of the can C (see FIG. 6C).

By providing a phase difference between the advancing and retreating of the necking die 12 and the guide block 18 in this manner, the guide block 1 is drawn when the can C is drawn by the necking die 12.
8 and the deformation of the open portion at one end of the can C can be prevented.

Further, the spindle housing 10 and the housing 10b of the necking mechanism F1
5, the entire axial pressing force of the necking die 12 can be detected when the spindle housing 10 is advanced and the necking die 12 performs drawing. That is, the drive shaft 3
It is sufficient to detect the maximum signal from the load cell 15 when 0 is from the rotational position θ (2) to the rotational position θ (3).

On the other hand, since the pad 21 and the holder 22 of the holding mechanism F2 are connected via the load cell 26,
The pressing force applied to the can C in the axial direction in the drawing can be detected in the same manner as the load cell 15 detects. Based on the detection signals from the load cells 15 and the load cells 26, processing data on the axial forming load and the radial forming load applied to the can C can be obtained. You can do it.

Next, when drawing is completed at the rotational position θ (3) of the drive shaft 30, the guide block shaft 16
Continues to retract, and the spindle housing 10 also begins to retract. At this time, the spindle housing 1
Since the elastic member 13 inserted in the cylinder 0 is compressed, when the spindle housing 10 retreats following the guide block shaft 16 which has retreated earlier, the restoring force of the elastic member 13 causes the necking cam 32 and the cam to return. Follower 1
4. Smoothly operate by relaxing the resistance with 4. That is, the elastic member 13 always acts in a direction in which the spindle housing 10 and the guide block shaft 16 approach each other. Then, the guide block shaft 16 returns at the rotation position θ (6), and the spindle housing 10 returns to the origin position closest to the drive shaft 30 at the rotation position θ (7).

In this necking molding, the can block C is formed from the time when the guide block 18 is fitted to one end of the can C until the time when the guide block 18 is removed after the molding.
Is pressurized with compressed air. That is, the shafts of the guide block shaft 16 and the adapter 17a are hollow, and the bolt 17c for attaching the annular necking die 12 is also a through hole of the nozzle 17f.
When compressed air is supplied to the guide block shaft 16 through the compressed air introduction port 16c, the can C
Can be pressurized. Then, by applying pressure from inside to the can C being molded, the can C can be prevented from being deformed, and the can C can be easily separated from the necking die 12 after molding.

Subsequently, in order to perform flanging on the drawn can C, the necking die 12 initially attached to the spindle housing 10 and the guide block 1 attached to the guide block shaft 16 shown in FIG.
8 and replace it with a flanging die 50 shown in FIG. This flanging die 50
As described above, the die is an annular die whose outer peripheral surface is narrowed, and is fixed to the distal end of the spindle housing 10 by the clamp ring 11 in the same manner as the necking die 12 used in necking molding. In this case, the guide block 18 attached to the guide block shaft 16 at the time of necking molding is removed by removing the bolts constituting the nozzle 17f together with the adapter 17a (see FIG. 7E).

After the flanging die 50 is attached to the spindle housing 10 as described above, when the drive shaft 30 is rotated by the drive means F3 in the same manner as in the above-described drawing, the necking cam 32 rotates to rotate the spindle housing 10 Moves forward and the flanging die 50
Is fitted from the inner peripheral side to one end of the can C that has been subjected to the drawing process, and a flange is formed at the open portion of the one end of the can C (see FIG. 7F). When the drive shaft 30 further rotates, the spindle housing 10 retreats and the flanging die 50 separates from the can C.
By releasing 2, the processed can C can be removed from the apparatus (see FIG. 7 (g)).

During the flanging molding, compressed air is introduced into the guide block shaft 16 from the compressed air inlet 16c, and the can with the flanging die 50 fitted through the hollow center of the guide block shaft 16. C
Blows compressed air into the interior. That is, from the time when the guide block 18 is fitted to the can C to the time when the flanging die is completed and the flanging die 50 is separated from one end of the can C, the inside of the can C is pressurized by the compressed air. Thereby, deformation of the can C during molding can be prevented, and the molded can C can be easily separated from the flanging die 50.

Further, in this flanging molding, similarly to the necking molding, machining information on the molding load can be obtained by the load cell 15 provided in the necking mechanism F1 and the load cell 26 provided in the holding mechanism F2. .

As described above, in the present apparatus, the holding mechanism F2 for supporting the other end of the can C, and the cylindrical spindle housing 10 provided on one end of the supported can C on the same axis as the can C are provided. And a guide block shaft 16 inserted into the spindle housing 10.
When the drawing process is performed on the tip of the spindle housing 10, the diameter is reduced as the annular shape is formed and the inner peripheral surface is separated from one end of the can C.
A necking die 12 is fitted to one end of the can C from the outer peripheral side and is subjected to drawing processing. The necking die 12 is formed into an annular body when the flanging processing is performed.
The diameter increases as the distance from one end of the
A flanging die 50 that fits into one end portion of the inside from the inner peripheral side and performs flanging processing on this is attached. On the other hand, the tip of the guide block shaft 16 is formed into an annular body when drawing is performed, and the can C
A guide block that fits from one inner side to the other and holds the one end is attached. Further, the spindle housing 10 and the guide block shaft 16 are each provided so as to be able to advance and retreat along the axis, so that test processing can be easily performed in accordance with the manufacturing process without using a processing line. Further, it is possible to easily find the processing conditions while variously changing the necking die 12 formed into a desired shape.

When performing drawing, the holding mechanism F2
The guide block shaft 16 on which the guide block 18 is mounted is advanced toward one end of the can C supported by the can C, and when the advanced guide block 18 is fitted to one end of the can C, Drive means F3 is provided to advance the spindle housing 10 with the necking die 12 attached thereto, and to retract the guide block shaft 16 when the necking die 12 is fitted to one end of the can C. A phase difference can be provided between the forward and backward movements of the guide block 18 and the guide block 18,
It is possible to avoid interference by the guide block 18 during drawing of the can C by the necking die 12, and also to prevent deformation of the open portion at one end of the can C, thereby obtaining a processing state similar to that of an actual manufacturing process. .

A load cell 15 is provided in the spindle housing 10 of the necking mechanism F1 as pressure detecting means for detecting a pressing force in the axial direction.
5, the necking die 12 or the flanging die 50 is attached to the spindle housing 1.
It is possible to detect the total pressing force in the axial direction of the necking die 12 or the flanging die 50 when the drawing process is performed by the necking die 12 by advancing 0 or when the flange processing is performed by the flanging die 50.

Since the holding mechanism F2 is provided with the load cell 26 as a pressure detecting means for detecting the pressing force in the axial direction, the pressing force in the axial direction received by the can C in the drawing process can be detected. Based on the detection signals from the load cell 15 and the load cell 26 of the forming mechanism F1, processing data on the axial forming load and the radial forming load applied to the can C can be obtained.

Further, the guide block shaft 1
Since a nozzle for ejecting compressed gas is formed at the tip of 6, the guide block 18 is detached from the nozzle after the molding from the time of fitting the guide block 18 to one end of the can C in necking molding. In the flanging molding, compressed air is supplied to the inside of the can C during the processing from the time when the guide block 18 is fitted to the can C to the time when the flanging die 50 is removed after the molding. Since it can be in a pressurized state, deformation of the can C during molding can be prevented, and the can C
Can be easily detached from the necking die 12 and the flanging die 50.

In this embodiment, compressed air is used to pressurize the can C during processing. However, pressurized air may be pressurized air at a pressure higher than the atmospheric pressure. By using various kinds of filled inert gas, such a container is arranged in the present apparatus and shared with the holding mechanism F2,
An air source such as an air compressor is not required separately, and the entire apparatus can be made compact.

[0064]

As described above, according to the present invention, there is provided a necking forming apparatus for performing drawing or flanging on one end of a cylindrical can, wherein the holding device supports the other end of the can. A mechanism, a cylindrical spindle housing provided on the same axis as the one end of the can supported by the holding mechanism, and a guide block shaft inserted through the spindle housing; At the tip of the spindle housing, an annular body is formed in an annular shape, and the inner peripheral surface is reduced in diameter as it is separated from the one end of the can. A necking die for drawing, or a ring-shaped body, whose diameter is increased as the outer peripheral surface is separated from the one end of the can, and an inner end is formed in the one end of the can. A flanging die that fits from the side and performs the flanging process is attached thereto, and the tip of the guide block shaft is formed into an annular body at the one end of the can when the drawing process is performed. A guide block that fits from the inner peripheral side and holds the one end is attached, and the spindle housing and the guide block shaft are respectively provided so as to be able to advance and retreat along the axis. The holding mechanism is provided so as to be able to advance and retreat along the axis of the spindle housing and is fixed to a predetermined distance with respect to the spindle housing. Workability can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a necking forming apparatus according to the present invention.

FIG. 2 is a side view showing an embodiment of the necking forming apparatus according to the present invention.

FIG. 3 is a side sectional view showing a forming mechanism of the neck forming apparatus.

FIG. 4 is a side sectional view showing a holding mechanism of the neck forming apparatus.

FIG. 5 is a front view showing a holding mechanism of the neck forming apparatus.

FIG. 6 is an explanatory view showing a drawing process by a forming mechanism.

FIG. 7 is an explanatory view showing a flanging process by a forming mechanism.

FIG. 8 is an operation explanatory view of a necking die and a guide block based on a driving means.

[Explanation of symbols]

 F1 Forming mechanism 10 Spindle housing 10b Housing 12 Necking die 14, 19 Cam follower 15, 26 Load cell 16 Guide block shaft 17f Nozzle 18 Guide block F2 Holding mechanism 20 Chuck 21 Pad 22 Holder 24 Slide plate 24b Clamp screw 27 Slide rail F3 Drive means 30 Drive shaft 32 Necking cam 34 Guide block cam

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-210135 (JP, A) JP-A-2-220723 (JP, A) JP-A-63-115623 (JP, A) JP-A-5-205 245563 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 51/26

Claims (1)

(57) [Claims] 1. A necking forming apparatus for drawing or flanging one end of a cylindrical can, comprising: a holding mechanism for supporting the other end of the can; and a supporting mechanism supported by the holding mechanism. A cylindrical spindle housing provided on the one end side of the can on the same axis as the can; a guide block shaft inserted through the spindle housing; and a tip end of the spindle housing formed in an annular body And the inner peripheral surface is reduced in diameter as it is separated from the one end of the can, and the necking die or the annular body is fitted to the one end of the can from the outer peripheral side and subjected to the drawing process. The can is formed and the outer diameter is increased as the outer surface is separated from the one end of the can. At the end of the guide block shaft, the end of the guide block shaft, which is formed into an annular body and fitted to the one end of the can from the inner peripheral side, is attached to the end of the guide block shaft. A guide block for holding a portion is attached, and the spindle housing and the guide block shaft are respectively provided so as to be able to advance and retreat along the axis, and the holding mechanism is able to advance and retreat along the axis of the spindle housing. A necking forming apparatus, further comprising a fixing member provided at a predetermined distance from the spindle housing.