JP3173293B2 - Can forming 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 deep drawing method in which a straight rod-shaped punch is linearly reciprocated in a through hole of a die.
The present invention relates to a can forming apparatus for performing ironing (DI processing, draw and ioning processing) to form a metal can body made of aluminum, steel, or the like.

[0002]

2. Description of the Related Art In general, a bottomed cylindrical can body made of aluminum, steel, or the like is formed by forming a plate into a cup shape by a cupping press, and then setting the plate material in a through hole of a die. The movable punch enables deep drawing and
It is made by ironing.

As a molding apparatus for molding such a can, there is, for example, one having a structure disclosed in JP-A-6-71350. This forming device has a large gear with inner peripheral teeth formed thereon, a pitch circle diameter that is the same as the pitch circle radius of the large gear, and meshes with the inner peripheral teeth of the large gear to move along the large gear. It comprises a moving small gear, a drive mechanism connected to the small gear, and revolving the small gear around the axis of the large gear, and a punch rotatably provided on the pitch circle of the small gear. ing.

According to this molding apparatus, the small gear is driven by the driving mechanism while the small gear having the same pitch circle diameter as the large gear is meshed with the inner peripheral teeth of the large gear. When the small gear is revolved around the center, the small gear revolves together with the revolution, and a point on the pitch circle of the small gear is moved along a path that reciprocates linearly on the diameter of the pitch circle of the large gear. As a result, there is an advantage that the punch rotatably provided at one point on the pitch circle of the small gear is reciprocated smoothly and quickly, and the forming speed of the can body can be improved. In addition, since the punch is moved without swinging, it is possible to prevent a burden on the bearing portion supporting the punch, and to stably perform the can forming process for a long period of time.

In the above-mentioned molding apparatus, gas is supplied to a gas discharge hole a in the punch and discharged into the can from the tip of the punch in order to smoothly release the molded can from the tip of the punch. It is made to let. In this case, in the above-described molding apparatus, the reciprocating movement speed of the punch is greatly improved, so that the supply of gas from the fixed side to the gas discharge hole is replaced by a conventional flexible hose, and a pipe connected in a link shape is used. It is to be performed by members.

[0007] For example, as shown in FIG. 7, the pipe member 1 communicates with an L-shaped rotating body 3 rotated around the axis 2 of the large gear and a flow path 3 a of the L-shaped rotating body 3. A ring body 4 having a communication hole 4a and a sliding member 6 provided on the fixed side and brought into close contact with the surface of the ring body 4 by a spring 5 are provided. The gas supply hole 7 opened in the sliding surface 6a of the sliding contact member 6 is communicated with the communication hole 4a in accordance with the rotation angle position of the ring body 4 or cut off, so that gas is discharged in accordance with the position of the punch 8. The discharge and stop of the gas from the hole 8a are performed.

That is, in a state where the punch 8 reaches the front end of the movement and the can is formed, the gas supply hole 7 is communicated with the communication hole 4a to feed the gas into the can, and the punch 8 is extracted from the can. In this state, the positions of the gas supply hole 7 and the communication hole 4a are completely shifted and blocked, and the discharge of gas from the tip of the punch 8 is stopped. In this case, the airtightness of the sliding surface 6 a between the ring body 4 and the sliding contact member 6 is maintained by the urging force of the spring 5.

In FIG. 4, reference numeral 9 denotes a connecting member, 9
a is a flow path inside the communication member 9, 10 is a connection pin, 10a is a flow path inside the connection pin 10, and 11 is a hose for communicating the flow path 9a of the communication member 9 with the gas discharge hole 8a of the punch 8. .

[0009]

By the way, in the molding apparatus having the above-mentioned structure, the springs 5 are provided at four places at intervals in the circumferential direction of the sliding contact member 6, for example. The member 6 and the ring body 4 are brought into close contact by a local biasing force. Therefore, the sliding member 6
Is the highest at the position of the spring 5 and the lowest between the springs 5,
The distribution of the pressing force on the sliding surface 6a becomes uneven along the circumferential direction.

However, if the distribution of the pressing force on the sliding surface 6a becomes non-uniform as described above, a minute gap is likely to occur at the position where the pressing force is the smallest, and the airtightness on the sliding surface 6a is impaired. Inconvenience is considered. When the airtightness is impaired, the pressurized gas sealed in the gas supply hole 7 by the ring member 4 causes the ring member 4 and the sliding contact member 6 to contact each other.
And squirt out of the gap between them, causing problems such as generation of noise.

In order to avoid this, it is conceivable to increase the urging force of the spring 5 to increase the pressing force as a whole. However, in this case, the frictional force on the sliding surface 6a between the ring body 4 and the sliding member 6 is increased, so that the smooth rotation of the L-shaped rotating body 3 is hindered. It is conceivable that inconveniences such as local wear occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides a smooth and reliable supply of gas to a gas discharge hole of a punch which can be rapidly reciprocated linearly to separate the can from the punch. Provided is a can forming apparatus capable of easily performing a mold, reliably preventing gas from leaking in the middle of a supply flow path, and performing durable and stable forming processing of a can body. It is an object.

[0013]

In order to achieve the above-mentioned object, the present invention provides a method for deep drawing and reciprocating a straight rod-shaped punch by reciprocating linearly into a through hole of a die fixed to a gantry.
What is claimed is: 1. A can forming apparatus for forming a can body by ironing, comprising: a linear moving mechanism for linearly moving the punch in a reciprocating manner in a longitudinal direction thereof; and a gas supply mechanism for discharging gas from the tip of the punch. A gear that is fixed to the gantry and has internal teeth, a small gear that has a pitch circle diameter equal to the pitch circle radius of the large gear and meshes with the internal teeth of the large gear, A drive mechanism connected to the pinion and revolving the pinion around the axis of the large gear; and a support shaft provided on a pitch circumference of the pinion and rotatably connecting the punch, A gas supply source fixed to the gantry, a gas discharge hole provided inside the punch and opened at the tip of the punch, and a communication flow communicating the gas discharge hole with the gas supply source; And a communication path, wherein A flow path inside the rotating member rotatably supported around the axis of the large gear, a flow path inside the connecting member fixed to the small gear, and rotating the connecting member and the rotating member around the axis of the small gear. The flow path inside the connecting pin, which is freely connected, and the flow path disposed between the communication member and the gas discharge hole are connected in a sealed state to the outside, and the flow path of the rotary member and the gas supply are connected. And a sliding connection disposed between the rotating source and the gas supply source. The sliding connection is fixed to the flow path of the rotating member and the gas supply source and slid while being in close contact with each other. A pair of flat plate members that communicate or block the flow path of the rotary member opening on the sliding surface and the gas supply source according to the rotation position, and airtightness that holds the flat plate members so that they do not separate when shut off Holding means, wherein the airtight holding means A cylinder chamber which is provided over the entire circumference about the axis of the rotary member to the back of the member proposes a molding apparatus can made of a pressure source for supplying pressurized fluid to the cylinder chamber.

[0014] The airtightness maintaining means is connected to the gas supply source when the flow path of the rotary member and the gas supply source are shut off, and an exhaust flow path for discharging gas supplied from the gas supply source. It may be composed of

[0015]

According to the can forming apparatus of the present invention, when the driving mechanism is operated, the small gear is revolved around the axis of the large gear and rotated by meshing with the inner peripheral teeth of the large gear. In this case, the support shaft provided on the pitch circle of the small gear is moved along a path reciprocating on the diameter of the pitch circle of the large gear. Therefore, since the punch is rotatably mounted on the support shaft, the punch is reciprocated linearly with the support shaft.

At this time, the gas supply mechanism is operated to supply gas from a gas supply source fixed to the gantry to a gas discharge hole provided in the punch through a communication channel, and the gas is supplied to the tip of the punch. It is possible to release gas from the punch by discharging gas into the can body. In this case, the communication flow path seals the flow path provided inside the rotating member, the connection pin, and the communication member that are rotatably connected to each other, and the flow path that communicates the flow path with the gas discharge hole. Since it is configured so as to communicate with the state, it is possible to durably supply the gas by smoothly following the quick reciprocating linear movement of the punch.

In particular, the flow path of the rotating member and the gas supply source are:
When the can body is released from the punch because the flow path and the gas supply source are connected or blocked by the relative rotation of the pair of slid flat plate members that are connected by the sliding connection portion. It is possible to discharge the gas from the gas discharge hole only in the above state, and to stop the discharge of the gas in other states. In this case, when the airtight holding means is operated, the flat plate members are held so as not to be separated from each other, so that the gas is prevented from leaking from between the flat plate members.

Since the airtight holding means is composed of a cylinder chamber and a pressure source, the plate member is supplied with a pressurized fluid from the pressure source to a cylinder chamber disposed all around the rear surface of the plate member. Thus, a uniform pressing force is applied over the entire circumference, and a uniform distribution of the pressing force is achieved on the sliding surface.

As a result, the airtightness between the flat plate members is improved, so that the gas can be reliably prevented from leaking, and the leak can be effectively prevented by the minimum necessary pressing force. Therefore, the rotational motion of the rotating member is smoothly performed by minimizing the frictional force on the sliding surfaces between the flat plate members.

Further, if the airtightness holding means is constituted by an exhaust passage, when the gas supply source and the passage of the rotating member are shut off, the gas supplied from the gas supply source is exhausted. As a result, the gas is reliably prevented from leaking from between the flat plate members without increasing the pressure in the flow path.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a can forming apparatus according to the present invention will be described below with reference to FIGS. As shown in FIGS. 2 and 3, the can forming apparatus 20 according to the present embodiment is a cup-shaped formed body that is carried into the through hole 22 a of the die 22 from above the gantry 21 and is positioned and fixed by the cup holder 23. 24, a long punch 25 for performing deep drawing and ironing while inserting the through hole 22a of the die 22, a linear moving mechanism 26 for linearly moving the punch 25, and a punch 25 for linearly moving the punch 25. The gas is supplied to the gas discharge holes 27 formed inside the
5 and discharged from the tip of
5 and a gas supply mechanism 29 for releasing the mold from the tip. The gas may be, for example, air.

As shown in FIG. 2, the linear movement mechanism 26 has a ring-shaped large gear 31 having an inner peripheral tooth fixed to the fixed cylinder 30 in a fixed cylinder 30 fixed to the gantry 21.
A rotating shaft 32 disposed in the large gear 31 and rotatably supported by the fixed cylindrical body 30; and a gear supporting member 33 meshed with the inner peripheral teeth of the large gear 31 and engaged with the rotating shaft 32. A small gear 34 rotatably mounted; a driving mechanism 35 for revolving the small gear 34 about the axis 31a of the large gear 31 by rotating the rotary shaft body 32 around the axis 31a of the large gear 1; A support shaft 36 disposed on the pitch circumference of the gear 34 in parallel with the axis 34a thereof and integrally provided with the gear support 33; a connecting rod 37 rotatably supported by the support shaft 36; It is composed of a hollow pin 38 that rotatably connects the rod 37 and the base end of the punch 25.

The small gear 34 is formed to have a pitch circle diameter that matches the pitch circle radius of the large gear 31. Thereby, when the small gear 34 is moved along the inner peripheral teeth of the large gear 31 by the operation of the drive mechanism 35, the fixed point fixed on the pitch circle of the small gear 34 passes through the center point of the large gear 31. It can be moved on a straight line. That is, the support shaft 36 provided on the pitch circle of the small gear 34 can be linearly reciprocated on the pitch circle diameter of the large gear 31 while the small gear 34 makes one revolution.

Accordingly, the connecting rod 37 whose base end is rotatably mounted on the support shaft 36 and the punch 25 mounted on the connecting rod 37 can be easily moved in the longitudinal direction with the linear movement of the support shaft 36. Reciprocating linear motion along the line. In the drawing, reference numeral 39 denotes a flywheel, 40 denotes a motor for driving the flywheel 39 to rotate, and 41 denotes a rotation of the flywheel 39 to the rotating shaft 32.
, 42 is a pulley, and 43 is a belt.

The gas supply mechanism 29 is provided on the
A gas supply source 44 fixed to the punch 25 and a gas discharge hole 2 provided inside the punch 25 and opened at the tip of the punch 25.
7 and a communication channel 45 that communicates the gas discharge hole 27 with the gas supply source 44.

As shown in FIG. 1, the communication channel 45 has a hose 46 having one end connected to the base end of the gas discharge hole 27 of the punch 25, and the support shaft 36 connected to the other end of the hose 46. An internal flow path 36a, a flow path 47a inside a hollow communication member 47 fixed to the tip of the support shaft 36 and having the other end on an axis 34a of the small gear 34, and an axis 31a of the large gear 31 And a connecting pin 49 for rotatably connecting the rotating member 48 and the connecting member 47 on the axis 31a of the small gear 31 around the axis 31a. Channel 49a
And a sliding connection portion 50 disposed between the flow path 48a inside the rotating member 48 and the gas supply source 44.

The flow path 3 inside the hose 46 and the support shaft 36
A ring-shaped sliding contact member 51 that is slid on the outer peripheral surface of the support shaft 36 is provided at a connection portion with 6a. Sliding tool 5
1 is a hose mounting hole 4 to which the tip of the hose 46 is connected.
A flow passage 36a formed in the support shaft 36 communicates with the hose mounting hole 46a.

The flow passage 36a has one inlet hole formed along the axis of the support shaft 36 and a ring-shaped space 51 communicating with the inlet hole and formed in the sliding contact member 51.
and a cross-shaped exit hole communicating with a. The inlet hole is communicated with a flow path 47a inside the communication member 47.

The flow path 47a inside the connecting member 47 is formed through a ring-shaped recess 49b formed in the connecting pin 49.
It communicates with a substantially H-shaped channel 49a. In addition, this flow path 4
A flow path 48a inside the rotating member 48 communicates with 9a via a ring-shaped recess 49c formed in the connection pin 49. Further, the flow path 48a inside the rotating member 48
The ring member 52 attached to the rotating member 48
Communication holes 52a are communicated with each other.

The sliding connection part 50 is provided with the ring body 52.
And a sliding member 53 arranged in close contact with the upper surface thereof and slid on the upper surface of the ring body 52 by the rotation of the rotating member 48, and a pressing force in a direction in which the sliding member 53 and the ring body 52 are brought into close contact with each other. Means 54 (Airtightness maintaining means)
Is provided.

The sliding member 53 is provided with a gas supply hole 53a connected to a gas supply source 44 fixed to the gantry 21. The communication hole 52a provided in the ring body 52 is formed by a circular arc-shaped long hole having a predetermined length along the circumferential direction around the axis 31a of the rotating member 48, and within a predetermined rotation angle range of the rotating member 48. In the gas supply hole 5
The communication state with the gas supply hole 53a can be maintained, and the gas supply hole 53a is shut off in the other rotation angle range.

The pressing means 54 is movably along the axial direction to support the sliding contact member 53 at the tip of a post 56 which rotatably supports the rotating member 48 via a bearing 55. Ring-shaped block 5 provided
The cylinder chamber 58 is formed between the post 7 and the post 56 and a pressure source 59 for supplying a pressurized fluid to the cylinder chamber 58. The cylinder chamber 58 includes:
The rotating member 48 is formed in an annular shape that is arranged around the entire circumference of the axis 31a, and is provided in an airtight state by a seal member 60 such as an O-ring. As the pressure source 59, for example, the gas supply source 44 may be shared. Further, it may be provided separately from the gas supply source 44.

When the can body 28 is formed by using the can forming apparatus 20 configured as described above, a cup holder 24 is placed inside the cup-shaped formed body 24 carried into the through hole 22a of the die 22. The molded body 24 is positioned on the die 22 by inserting 23. Then, the elongated punch 25 is inserted into the inside of the cup holder 23 and the through-hole 22 a of the die 22 by the linear moving mechanism 26 to apply deep drawing and ironing to the molded body 24, and the can bottom receiving portion 61.
To complete the can body 28. Thereafter, by operating the gas supply mechanism 29, the gas is discharged from the gas discharge hole 27 opened at the tip of the punch 25, thereby releasing the can 24 from the tip of the punch 25, and Discharge.

In this case, the operation of the linear movement mechanism 26 for linearly moving the punch 25 in a reciprocating manner will be described in detail.
By rotating the motor 40 to rotate the flywheel 39 via the pulley 42 and the belt 43, the flywheel 39 is connected to the flywheel 39 via the clutch 41 connecting the flywheel 39 to the rotating shaft 32 during normal operation. Is transmitted to the rotating shaft 32. As a result, the rotating shaft 3
2 is rotated inside the fixed cylindrical body 30, so that the small gear 34 meshing with the large gear 31
While being revolved around "a", it is rotated with the gear support 33.

As a result, a support shaft 36 protruding from the end of the gear support 33 on the pitch circle of the small gear 31 is rotatably connected to the support shaft 36 via a bearing. The hollow pin 38 and the punch 25 are reciprocated linearly by the diameter of the pitch circle of the large gear 31. In this case, while the small gear 34 makes one revolution while rotating along the inner peripheral teeth of the large gear 31, the small gear 3
4. The support shaft 36 makes one rotation about its own axis while reciprocating linearly.

The connecting rod 37 rotatably connected to the support shaft 36 via a bearing smoothly supports the rotation of the support shaft 36 by the bearing and reciprocates linearly. Punch 2 connected via 38
5 also reciprocates linearly and reliably without swinging in a direction perpendicular to its axis. Therefore, the punch 25
Can be smoothly inserted through the through hole 22a of the die 22, and the can body 28 can be formed at a high speed.

The other end of the connecting member 47, one end of which is attached to the support shaft 36, together with the connecting pin 49 rotatably connected to this end, is connected to the axis 34 of the small gear 34.
As in the case of a, the rotary motion is performed about the axis 31a of the large gear 31. Further, the rotation member 48 rotatably supporting the connection pin 49 is rotated about the axis 31 a of the large gear 31 with the rotation of the connection pin 49.

After the punch 25 performs deep drawing and ironing to form the can 28 while the formed body 24 is inserted into the through hole 22a of the die 22, the punch 25
The gas is discharged from the tip of the punch 25 into the can 28 in order to release the can 28 from the mold. In this case, the communication hole 52a of the ring body 52 provided in the rotating member 48 and the gas supply hole 53a of the sliding contact member 53 slidably contacting the ring body 52 communicate with each other, thereby fixing to the gantry 51. From the gas supply source 44, the gas supply hole 53a, the communication hole 52a, the flow path 48a of the rotating member 48, and the connection pin 49.
Ring-shaped recess 49c, flow path 49a, ring-shaped recess 49
b, flow path 47a of communication member 47, flow path 36 of support shaft 36
a, gas is supplied into the gas discharge hole 27 of the punch 25 through the ring-shaped space 51a of the sliding contact member 51, the hose mounting hole 46a, and the hose 46. Thereby, the can body 28 is easily released from the punch 25.

In this case, the ring body 52 and the sliding contact member 53 are pressed in a direction in which they are in close contact with each other by a pressurized gas supplied to a cylinder chamber 58 provided on the back surface of the sliding contact member 53. . Since the cylinder chamber 58 is formed in an annular shape distributed over the entire circumference on the back surface of the sliding contact member 53, a uniform pressing force is applied along the circumferential direction to the sliding contact member 5.
3 can be given.

As a result, the distribution of the pressing force on the sliding surface 53b between the sliding contact member 53 and the ring 52 can be made uniform, and the sliding surface 53b can be uniformly sealed. Therefore, as compared with the conventional case of pressing by a plurality of springs 5, the sliding surface 53b
Airtightness can be improved.

In particular, the effect of improving the airtightness is as follows.
Is most released when the gas is released from the punch 25 and the discharge of gas from the tip of the punch 25 is stopped. That is, the discharge of the gas from the gas discharge hole 27 is stopped when the communication hole 52a of the ring body 52 is separated from the gas supply hole 53a of the sliding member 53 by the rotation of the rotating member 48. In this case, the gas supply hole 53a is closed by the ring body 52, and the sealed gas tends to squirt from the sliding surface 53b between the sliding member 53 and the ring body 52.

Therefore, when the distribution of the pressing force on the sliding surface 53b is non-uniform, the gas is ejected from the place where the pressing force is the smallest. However, if close contact is made with a uniform pressing force as in the present embodiment, the ejection of gas can be effectively prevented, and inconvenience such as generation of noise can be avoided.

Further, in this embodiment, since the pressure source 59 of the pressurized gas supplied to the cylinder chamber 58 is shared with the gas supply source 44, the pressure inside the cylinder chamber 58 and the gas supply hole 53a are sealed. The pressure of the gas becomes equal. Therefore, the sectional area of the cylinder chamber 58 is
If it is formed larger than 3a, airtightness can be reliably maintained. In addition, since the pressing force for maintaining the airtightness can be set to a necessary minimum, the frictional force on the sliding surface 53b can be reduced, and the smooth operation of the rotating member 48 can be secured.

Next, another embodiment of the can forming apparatus according to the present invention will be described with reference to FIGS. The can forming apparatus 20 according to the present embodiment is different from the above embodiment in the airtightness maintaining means. Note that the same reference numerals are given to portions having the same configuration as the above-described embodiment, and the description will be simplified.

As shown in FIGS. 4 to 6, the airtightness maintaining means of this embodiment comprises a sliding member 101 and a ring body 102.
Is provided by providing an exhaust passage 103 at the bottom.
The exhaust channel 103 includes an exhaust port 104 provided in the sliding member 101 and a groove-shaped channel 105 provided in the ring body 102.

The exhaust port 104 is, for example, a ring 1
02 is disposed at a position shifted radially inward so as not to contact the communication hole 52a. In addition, the groove-shaped flow path 10
5 is formed over the entire circumference of the sliding surface 102a of the ring body 102 with the communication hole 52a and the partition wall 106 interposed therebetween, so that the exhaust port 104 can always be arranged inside the sliding surface 102a. ing. The partition wall 106 is formed to have a width smaller than the diameter of the gas supply hole 53a.
The setting is made such that the moment of completely closing by a does not occur.

According to the can forming apparatus configured as described above, when the can body 28 formed at the tip of the punch 25 is released from the mold, the position of the punch 25 (that is, the rotation angle of the rotating member 48). Gas supply hole 53a of the sliding contact member 101 according to
The communication with the communication hole 52 a of the ring body 102 is performed as shown in FIG. 5, and gas is discharged from the tip of the gas discharge hole 27. Then, in a state where the can body 28 is completely released from the punch 25, the gas supply hole 53a is disengaged from the communication hole 52a of the ring body 102, and the discharge of gas is stopped. In this case, the gas supply holes 53a are immediately disposed inside the groove-shaped flow path 105.

Since the exhaust port 104 is always connected to the groove-shaped flow path 105, the gas supplied from the gas supply hole 53a to the groove-shaped flow path 105 is exhausted as shown in FIG. It will be discharged outside through the opening 104. Therefore, according to the can forming apparatus according to the present embodiment, even when the discharge of the gas from the gas discharge holes 27 is stopped, the gas is prevented from being confined in the gas supply holes 53a. , Sliding member 101 and ring 1
It is possible to effectively prevent the gas from being ejected from the sliding surface 102a with the second surface 02.

[0049]

As described above in detail, the apparatus for forming a can according to the present invention includes a linear moving mechanism and a gas supply mechanism.
A linear gear having a gear with inner peripheral teeth, a small gear having the same pitch circle diameter as the pitch circle radius and meshing with the large gear, and a drive mechanism for revolving the small gear around the axis of the large gear And a support shaft provided on the pitch circumference of the small gear and rotatably connecting the punch, wherein the gas supply mechanism communicates with the gas supply source, the gas discharge hole opened at the tip of the punch, and these. And a communication flow path, the communication flow path, while the rotary member, the communication member, the connection pin and the flow path between the communication member and the gas discharge hole in a sealed state, the flow path of the rotary member and A sliding connection portion provided between the gas supply source and the gas supply source, wherein the sliding connection portion is slidably tightly closed, and a flow path of a rotating member and a gas supply source which are opened on their sliding surfaces; It consists of a pair of flat plate members that communicate and block according to the rotational position and airtight holding means. Since the airtight holding means is constituted by a cylinder chamber provided on the back surface of the flat plate member around the rotation axis of the rotation member over the entire circumference, and a pressure source for supplying a pressurized fluid thereto, a driving mechanism is provided. By moving the support shaft linearly reciprocating on the pitch circle diameter of the large gear by the operation of, the punch can be reciprocated linearly quickly without swinging. Thus, the gas is reliably supplied by the gas supply mechanism, and the mold can be easily released from the punch.

Further, when the flow path of the rotary member and the gas supply source are shut off in accordance with the position of the punch, the flat plate members are entirely moved around the axis of the rotary member by the pressurized fluid supplied to the cylinder chamber. Since the contact can be made with a uniform pressing force over the circumference, there is an effect that the gas sealed in the flow path can be reliably prevented from leaking from between the flat plate members. Further, the pressing force between the flat plate members is sufficient as the minimum pressing force required to maintain the airtightness, so that the frictional force that hinders the rotation operation of the rotating member can be reduced and the rotating member can be operated smoothly.

Further, an air-tightness maintaining means is connected to the gas supply source when the flow path of the rotating member and the gas supply source are shut off, and an exhaust passage for discharging gas supplied from the gas supply source. With such a configuration, even when the flow path is blocked by the flat plate member, it is possible to avoid a pressure rise itself that leaks gas from between the flat plate members without gas being confined. To play. As a result, the punch can be reciprocated linearly and quickly and smoothly, and the can can be released from the punch without gas leakage, as in the case of the above-described can forming apparatus.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a gas supply unit showing one embodiment of a can forming apparatus according to the present invention.

FIG. 2 is a partially broken longitudinal sectional view showing the entire configuration of the can forming apparatus of FIG. 1;

3 is a partially broken front view showing the vicinity of a die of the apparatus for forming a can of FIG. 1. FIG.

FIG. 4 is a perspective view for explaining another embodiment of the can forming apparatus according to the present invention.

FIG. 5 is a schematic diagram for explaining the operation of the can forming apparatus of FIG. 4;

FIG. 6 is a schematic diagram for explaining the operation of the can forming apparatus as in FIG. 5;

FIG. 7 is a longitudinal sectional view showing a conventional example of a can forming apparatus.

[Explanation of symbols]

 REFERENCE SIGNS LIST 20 forming apparatus 21 gantry 22 dice 22 a through hole 25 punch 26 linear movement mechanism 27 gas discharge hole 28 can body 29 gas supply mechanism 31 large gear 31 a / 34 a axis 34 small gear 35 drive mechanism 36 support shaft 44 gas supply source 45 continuous flow Road 46 / 47a / 48a / 49a Flow path 47 Connecting member 48 Rotating member 49 Connecting pin 50 Sliding connection part 52 Sliding contact member (flat member) 53 Ring body (flat member) 53b Sliding surface 54 Pressing means (airtightness retention) Means) 58 Cylinder chamber 59 Pressure source 103 Exhaust flow path (airtightness maintaining means)

──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. ⁷ Identification symbol FI B21D 51/26 B21D 51/26 X (56) References JP-A-6-71350 (JP, A) JP-A-6-71351 ( JP, A) JP-A-6-71353 (JP, A) JP-A-57-115923 (JP, A) JP-A-52-148390 (JP, A) Full-open flat 4--60317 (JP, U) Full-open Hei 4-12324 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21D 22/20 B21D 22/28 B21D 24/00 B21D 45/04 B21D 51/26

Claims (2)

(57) [Claims] 1. A deep drawing / removing method in which a straight rod-shaped punch is linearly reciprocated in a through hole of a die fixed to a base.
What is claimed is: 1. A can forming apparatus for forming a can body by ironing, comprising: a linear moving mechanism for linearly moving the punch in a reciprocating manner in a longitudinal direction thereof; and a gas supply mechanism for discharging gas from a tip of the punch. A large gear having the inner peripheral teeth fixed to the gantry, and a small gear having a pitch circle diameter equal to the pitch circle radius of the large gear and meshing with the inner peripheral teeth of the large gear; A drive mechanism connected to the pinion and revolving the pinion around the axis of the large gear; and a support shaft provided on a pitch circumference of the pinion and rotatably connecting the punch, A gas supply source fixed to the gantry, a gas discharge hole provided inside the punch and opened at the tip of the punch, and a communication flow communicating the gas discharge hole with the gas supply source; And the communication channel is a frame. A flow path inside the rotary member rotatably supported on the base around the axis of the gear, a flow path inside the communication member fixed to the pinion, and the communication member and the rotation member around the axis of the pinion. A flow path inside the connection pin rotatably connected to the flow path inside the connection pin, and a flow path arranged between the communication member and the gas discharge hole are communicated with the outside in a sealed state, and the flow path of the rotation member. A sliding connection portion is provided between the gas supply source and the sliding connection portion, and the sliding connection portion is fixed to the flow path of the rotating member and the gas supply source and slid while being in close contact with each other, A pair of flat plate members for communicating or shutting off the flow path of the rotary member and the gas supply source opened on the sliding surfaces according to the rotation position, and holding the flat plate members so as not to separate when shut off. Airtightness maintaining means, wherein the airtightness maintaining means, A can forming apparatus comprising: a cylinder chamber provided on the back surface of a flat plate member around the rotation axis of a rotating member over the entire circumference; and a pressure source for supplying a pressurized fluid to the cylinder chamber. 2. A deep drawing / removing method by linearly reciprocating a straight rod-shaped punch in a through hole of a die fixed to a base.
What is claimed is: 1. A can forming apparatus for forming a can body by performing ironing, comprising: a linear moving mechanism that linearly moves the punch in a reciprocating manner in a longitudinal direction thereof; and a gas supply mechanism that discharges gas from a tip of the punch. A large gear having the inner peripheral teeth fixed to the gantry, and a small gear having a pitch circle diameter equal to the pitch circle radius of the large gear and meshing with the inner peripheral teeth of the large gear; A drive mechanism connected to the pinion and revolving the pinion around the axis of the large gear; and a support shaft provided on a pitch circumference of the pinion and rotatably connecting the punch, A gas supply source fixed to the gantry, a gas discharge hole provided inside the punch and opened at the tip of the punch, and a communication flow communicating the gas discharge hole with the gas supply source; And the communication channel is a frame. A flow path inside the rotary member rotatably supported on the base around the axis of the gear, a flow path inside the communication member fixed to the pinion, and the communication member and the rotation member around the axis of the pinion. A flow path inside the connection pin rotatably connected to the flow path inside the connection pin, and a flow path arranged between the communication member and the gas discharge hole are communicated with the outside in a sealed state, and the flow path of the rotation member. A sliding connection portion is provided between the gas supply source and the sliding connection portion, and the sliding connection portion is fixed to the flow path of the rotating member and the gas supply source and slid while being in close contact with each other, A pair of flat plate members for communicating or shutting off the flow path of the rotary member and the gas supply source opened on the sliding surfaces according to the rotation position, and holding the flat plate members so as not to separate when shut off. Airtight holding means, wherein the airtight holding means, An apparatus for forming a can, comprising: an exhaust passage that is connected to the gas supply source when the passage of the rotating member and the gas supply source are shut off, and that discharges gas supplied from the gas supply source. .