RU2575889C2 - Method and device for can body forming - Google Patents

Method and device for can body forming Download PDF

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Publication number
RU2575889C2
RU2575889C2 RU2013111458/02A RU2013111458A RU2575889C2 RU 2575889 C2 RU2575889 C2 RU 2575889C2 RU 2013111458/02 A RU2013111458/02 A RU 2013111458/02A RU 2013111458 A RU2013111458 A RU 2013111458A RU 2575889 C2 RU2575889 C2 RU 2575889C2
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RU
Russia
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stamp
annular
punch
central
specified
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RU2013111458/02A
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Russian (ru)
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RU2013111458A (en
Inventor
Р. Питер СТОДД
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Контейнер Девелопмент, Лтд
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Priority to US12/924,077 priority Critical
Priority to US12/924,077 priority patent/US8573020B2/en
Application filed by Контейнер Девелопмент, Лтд filed Critical Контейнер Девелопмент, Лтд
Priority to PCT/US2011/001590 priority patent/WO2012039747A2/en
Publication of RU2013111458A publication Critical patent/RU2013111458A/en
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Publication of RU2575889C2 publication Critical patent/RU2575889C2/en

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Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to metal forming and may be used for drawing of the can body. Claimed device comprises the piercing and drawing dies, top retainer composed by outer and inner pressure bushes and arranged around the die central piston. All said dies are provided with pistons. Air chamber is connected via air damping channels with the outer pressure bush piston. Note here that said outer pressure bush receives air at the pressure the air chamber receives said air at, or under a lower pressure. The die central puncher incorporates the plug-in cutter to initiate the cylinder drawing. Note here that the inner pressure bush and the die central puncher feature the shaped surfaces. The latter are coupled with opposite surfaces at the die circular core to form and to lock the body inclined wall at the die down stroke. Panel puncher has peripheral surfaces to form the panel wall and body chamfer at the die up stroke.
EFFECT: ruled out thinning of sheet metal.
7 cl, 11 dwg

Description

The present invention relates to a method and apparatus for forming a can body of sheet steel or sheet aluminum, for example, such as the methods and devices or tooling disclosed in US Pat. Nos. 4,713,958, 4,716,755, 4,880,552, 4,955,223, 6,658,911 and 7,302,822. Disclosures of these patents are included here by reference, supplementing the detailed description of the present invention.
In such a tooling or device, it is desirable that the device is designed for use in a single-action mechanical press (as disclosed in the aforementioned patents 4955223 and 7302822), as well as for use in a double-action mechanical press (as disclosed in the aforementioned patents 4716755 and 6658911). The design of a high-performance single-action press is simpler and more economical in operation and maintenance and can be effectively operated, for example, with a stroke of 1.75 inches and at a speed of 650 strokes per minute. Many more single-acting high-performance presses are used in the art than double-acting presses.
It is also desirable that the device or tooling include an internal pressure sleeve and an external pressure sleeve, and it is also desirable to operate both bushings with excess air pressure, but the use of an internal pressure sleeve having peripherally located and stretching axially springs ( for example, disclosed in patent 7302822), or to avoid the use of circumferentially extending and extending along the axis of the fingers (for example, disclosed in patent 4716755). The fast axial reciprocating movement of the fingers and one piston that drives the fingers additionally generates unwanted heat, and also prevents the creation of a customizable and precisely adjustable axial force on the internal pressure sleeve when using compression springs.
In addition, while the press is operating at high speed, it is also desirable to have a precisely controlled constant force exerted on the sheet material by the external pressure sleeve in order to avoid thinning of the material between the external pressure sleeve and the die ring core. A precisely controlled air pressure on the inner pressure sleeve is also desirable for holding the inner arch and the inclined wall of the can body while forming a chamfer, panel wall and the central panel of the can body without thinning the sheet metal. In addition, it is desirable to minimize the vertical height of the tooling used to make can bodies to use more known single-acting high-performance presses and operate at higher speeds with less heat to avoid the use of a water cooling system. After reviewing the above patents, it will be apparent to those skilled in the art that none of these patents provides all of the desirable features mentioned above.
SUMMARY OF THE INVENTION
The present invention aims to improve the method and apparatus or equipment for high-performance production of can cases, as well as to provide all of the above desirable features. The tooling of the present invention is also ideally suited for the manufacture of a can body (such as a can disclosed in Applicant Patent 7341163 and in Applicant Published Patent Application US-2005-0029269, the disclosure of which is also incorporated herein by reference). The method and apparatus or tooling of the present invention, in particular, is particularly suitable for use on a single and double acting press and for the manufacture of uniform and size-accurate can bodies on a high-performance press with minimal heat, so as to avoid thermal deformation of the tooling during operation .
According to one illustrated embodiment of the present invention, the can body is formed by tooling including an internal annular pressure sleeve, which is located in the external annular pressure sleeve, and both bushings have integral pistons in the respective annular air piston chambers. The external pressure sleeve is located in an annular die-cut and exhaust stamp attached to the upper retainer mounted on the upper plate of a single or double-acting stamp. The latch also supports the central piston of the punch, which can support relative axial movement, and the central piston of the punch supports the central punch of the punch in the inner pressure sleeve. The central piston of the stamp defines the boundaries of the air chamber supplied with air through an inlet with a controlled high pressure. The air chamber is connected to the air piston chamber of the inner pressure sleeve by a large number of elongated air cushioning channels spaced around the periphery. The air piston chamber of the external pressure sleeve is supplied with air, mainly with a low controlled pressure, through a separate hole in the upper retainer.
The central die punch carries an adjustable insert cutter, which initiates the extraction of the cylinder from the sheet metal disk in the die, sandwiched between the external pressure sleeve and the opposite stationary ring die core supported by a lower latch mounted on the stationary lower die plate. The specified inner pressure sleeve and the annular core of the stamp have mating shaped surfaces forming an annular inner arch and the upper portion of the inclined wall of the can. The annular skirt of the central punch of the stamp is located around the insert cutter and has a contoured surface that mates with the contoured surface of the annular core of the stamp in order to form the lower portion of the inclined wall until the insert cutter finishes drawing the cylinder. The opposite panel punch has a peripheral shaped surface that forms the center panel of the housing, as well as an annular inclined panel wall and an annular chamfer, as soon as the center punch of the stamp returns to its original position. In another embodiment of the invention, the annular air piston chamber for the external pressure sleeve is connected to the air cushioning channels via ducts, wherein the annular air piston chamber for the internal pressure sleeve and the annular air piston chamber for the external pressure sleeve receive the same adjustable air supply pressure, which eliminates the need different air supply with different pressure during the operation of tooling on the movable bottom plate of the stamp .
Other features and advantages of the present invention will become apparent from the following description, accompanying figures, and claims.
Brief Description of the Figures
Figure 1 is an axial section of a tooling designed and operated in accordance with the present invention.
Figure 2 is an axial section of the tooling shown in Figure 1 and designed and operated in accordance with a modification or other embodiment of the present invention.
Figures 3-11 are enlarged sections of fragments of the tooling shown in Figures 1 and 2; they illustrate the sequential steps of manufacturing a can body on a single or double acting mechanical press in accordance with the present invention.
Description of preferred embodiments of the present invention
Referring to Figure 11, which shows a significantly enlarged case 15 made of sheet metal or aluminum, the thickness of which is approximately 0.0082 inches. The housing 15 includes a flat circular central panel 16 which, by means of a section of a panel wall 17 having the shape of a truncated cone or a wedge-shaped cone shape, as well as a substantially cylindrical section of the panel wall 18, is connected to an annular chamfer 19 having an inner section of the wall 21 that is inclined or has the shape of a truncated cone, and the cross section of which as a whole has a U-shaped configuration. Said chamfer 19 has a slightly inclined annular portion of the outer wall 22 connected to the annular lower portion of the inclined wall 23, which is connected to the upwardly curved upper portion of the inclined wall 24 by a slight angular bend 25. The upwardly curved portion 24 of the inclined wall is connected to the inclined or truncated shape cone section of the inner wall 26 of the arch 28, having a downward directed portion of the outer peripheral flange 29. The configuration of the cross section or profile of the housing 15 is more specifically open life in the aforementioned published patent application US-2005-0029269 of the applicant. However, the method and device according to this invention can also be adapted for the manufacture of housings having different profiles in axial cross section.
Turning to Figure 1. Tooling 35 includes an annular upper retainer 38 mounted on the top plate of a stamp 40 of a single or double acting mechanical press. The specified latch 38 has a cylindrical section 41, which protrudes upward into the abutting cavity 42 inside the upper part of the stamp 40 and sets the boundaries of the compressed air chamber 44. The annular punch and exhaust stamp 48 has an outwardly protruding upper flange portion 49, which is attached to the latch 38 using a series of peripherally located screws 51. A flat grounding ring gasket 52 is attached to the specified upper flange portion of the exhaust and punch stamp 48, it provides an exact axial arrangement of the stamp 48 relative to the upper latch 38.
The annular external push sleeve 55 serves as a support for axial movement inside the exhaust and punch stamp 48, and it has a piston 56 molded as a single unit with radial plastic wearing fingers 57. The central piston of the stamp 60 can serve as a support for axial movement inside the upper latch 38, it has the lower portion 62, which supports the Central punch of the stamp 65, movably attached to the specified Central piston 60 by the Central screw 66. A flat grounding ring gasket 67 is located between to the central punch of the stamp 65 and the shoulder on the lower portion 62 of the central piston of the stamp 60, which is done in order to ensure the exact selection of the axial placement of the specified central punch of the stamp on the central piston of the stamp 60. An annular insert cutter 68 forms the end of the central punch of the stamp 65 and is attached with using a number of peripherally located screws 69. Inside the central portion of the central piston of the stamp 60, a cylindrical chamber-reservoir of compressed air 70 is formed, which is closed from above by a threaded plug 71. K Amera reservoir 70 receives compressed air through an inlet 74 formed inside the latch 38 and connected to an annular groove 75 and a series of radial channels 76 formed inside the central piston of the stamp 60.
The annular inner pressure sleeve 80 serves as a support for axial movement inside the external pressure sleeve 55 and has a piston 82 made as a single unit, closed inside the annular chamber of the air piston 84 having boundaries between the piston 82 and the radial arm 86 on the lower portion 62 of the central piston of the stamp 60 The chamber of the air piston 84 receives compressed air through three peripherally located channels for air 88 extending in the axial direction from the specified shoulder 86 to the chamber-reservoir of compressed air 70 inside the center the piston 60. On the specified piston 82 of the inner pressure sleeve 80 and on the piston 56 of the external pressure sleeve 55, as well as on the upper portion of the central piston 60 are present. two-piece air sealing rings. The specified piston 56 of the outer pressure sleeve 55 is enclosed inside an annular chamber of compressed air 89, which reaches the retaining arm 90 and is connected to the annular chamber of air 91. Chambers 89 and 91 receive compressed air through the inlet 92 of the latch 38.
Tooling 35 also has a fixed annular lower retainer 94 mounted on a stationary lower plate of the stamp 95 of the press single or double action. The specified lower latch 94 supports the fixed annular core of the stamp 98 with the annular upper part 99, and also serves as a support for the fixed ring latch 102, which accommodates and limits the ring threaded rib of the stamp 105. A flat ground ring gasket 107 is attached to the latch 102 for holding ring threaded ribs of the stamp 105 and ensures the exact location of the specified ribs on one axis relative to the annular upper part 99 of the annular core of the stamp 98. The annular lower pressure the sleeve 110 is placed between the specified ring threaded rib of the stamp 105 and the annular upper part 99 of the annular core of the stamp 98 and has a piston 112 made as a single unit, serving as a support for axial movement inside the annular chamber of compressed air 114, the boundaries of which are installed between the lower latch 94 and the annular core of the stamp 98. The specified chamber 114 receives compressed air through an inlet (not shown) inside the lower latch 94.
The circular panel punch 118 is held inside the upper part 99 of the annular core of the stamp 98 and is fixed for axial movement with the piston of the panel punch 122 supported in the stepped cylindrical tunnel 123 that is formed inside the annular core of the stamp 98. A flat ground ring gasket 126 is located between the circular panel punch stamp 118 and the piston of the panel punch 122 in order to ensure accurate selection of the axial placement of the specified punch stamp 118 on the same axis since It piston 122. At the lower pressure sleeve 112 and the piston panel punch 122 are composed of two parts, air-seals in order to ensure air-tight sliding seals. An axially extended compressed air channel 127 is formed inside the central part of the piston of the panel punch 122, into which compressed air enters through the transverse channel 128 and the annular chamber 129. The specified channel 127 supplies a stream of compressed air through a central hole 131 inside the panel punch 118 to hold the housing 15 right next to the outer pressure sleeve 55 when said sleeve moves upward at the end of the piston pressure stroke (as shown in Figure 11) in order to provide quick lateral recess of the finished core Pusa in the standard way.
Referring to Figure 2. The modified tooling 35 'is constructed in the same way as the tooling 35, except that the central piston 60' does not have an inner chamber 70. Instead, compressed air enters the air cushion channels 88 'through radial channels 135, connected to an annular chamber 91 into which compressed air enters through inlet 92. This compressed air may be under a pressure of the order of 125-170 psi, so that the same air pressure is applied to the pores the pin 56 of the outer pressure sleeve 55 and the piston 82 of the internal pressure sleeve 80. Compared to the tooling 35 shown in Figure 1, the air reservoir chamber 70 receives compressed air through the inlet 74, the annular chamber 75 and the channels 76 under pressure 160-170 psi, while the piston 56 of the outer pressure sleeve 55 receives less compressed air under a pressure of about 80-90 psi through the inlet 92.
Refer to the enlarged fragmentary projections in Figures 3-11, which illustrate the additional structural and operational qualities of tooling 35 or 35 'with each stroke of the press. The inner pressure sleeve 80 has an end or nose portion 140, which is usually flush with the flat bottom surface of the center insert of the die 68 during the initial downward stroke (Figure 3) and the final upward stroke of the upper die plate 40 (Figure 11). The specified nose section 140 has an annular, consisting of opposite sections S-shaped surface 143, which includes an outwardly curved lower part of the surface 144 and an inwardly curved upper part of the surface 147. The lower end of the outer pressure sleeve 55 has a slightly arcuate or concave surface 151, which is opposite and mates with the arcuate surface of the vault 153 formed on the upper end portion 99 of the annular core of the stamp 98. The specified upper end portion 99 of the annular core of the stamp 98 also e has an outwardly curved surface 154, a truncated cone-shaped surface 156, an inwardly curved surface 157, an outwardly curved surface 158, and an inwardly curved surface 161. Shaped S-shaped surfaces 154, 156, 157 and 158 are joined with corresponding shaped 3-shaped surfaces 147, 143 and 144 at the lower end of the inner pressure sleeve 80.
Said panel punch 118 has a flat upper annular surface 162 surrounded by an inclined or truncated cone-shaped surface 163, a significant cylindrical surface 164, and a inclined or truncated cone-shaped surface 165, which is opposite the S-shaped surface 166 at the lower end of the cylindrical skirt portion 167 the Central punch of the stamp 65. As shown in Figures 3 and 4, as the upper plate of the stamp 40 begins to move down, the exhaust and punch stamp 48 is combined with a rifled p bromo die 105 in order to cut down the workpiece substantially annular disk 170 of a thin metal layer or aluminum. Continuing downward movement of the indicated upper die plate (Figure 4) causes the annular part of the disk 170 to be clamped between the external pressure sleeve 55 and the ring core of the die 98 under adjustable pressure, which is determined by the selection of air pressure on the piston 56 of the external pressure sleeve 55. The external peripheral edge portion of the disk 170 is pulled down around the upper end portion of the annular core of the stamp 98 by moving down the exhaust and punch stamp 48, as well as the lower pressure sleeve 110, while the clamping pressure is regulated odborom air pressure within the chamber 114 to the piston 112 of said lower pressure sleeve 110.
As shown in Figures 4 and 5, the central insertion tool cutter 68 has an angular surface 173 with a large radius, and this radius is greater than the radius of the outwardly curved surface 144 of the S-shaped surface 143 on the inner pressure sleeve 80. The insert tool of the die 68 begins to stretch cylinder C (Figure 5) from the central portion of the disk 170 within the outer pressure sleeve 55 and the annular core of the stamp 98. The inner arch 26 of the housing 15 is formed between the surfaces 147, 143 and 144 on the internal pressure sleeve 80 and the abutting surface E on the ring core die 98 (Figure 5). Continuing downward movement of the upper die plate 40 causes the engagement of the insert cutter 68 of the central die punch 65 and the pressurized panel punch 118 to continue stretching the portion of the cylinder C, while the outer portion of the disk 170 slides between the outer pressure sleeve 55, the annular core of the die 95 and punch and exhaust stamp 48. As shown in Figure 7, the continuation of the downward movement of the upper plate of the stamp 40 causes the annular portion of the skirt 167 of the central punch of the stamp 65 to extend from the inner press sleeve 80 until the contact of the shaped end surface 166 of the section of the skirt 167 with the surfaces 158 and 161 in order to form inclined sections 23 and 24 connected by a slight angular bend 25. At the same time, the lower shaped surfaces 143, 144 and 147 of the inner pressure sleeve 80 form and fix the intermediate annular section of the disk 170 right next to the abutted shaped surfaces 157, 156 and 154 of the annular core of the stamp 98, with the aim of forming the annular sections 23, 24 and 26 (Figure 11) of the housing 15. Arch 28 and the external flange 29 of the housing 15 are simultaneously formed on the annular core of the stamp 98 under the action of an adjustable force on the piston 56 of the external pressure sleeve 55.
When the upper plate of the press die 40 reaches down to the lower point of its stroke (Figure 7), and the piston 56 stops on the shoulder 90 of the central piston of the die 60, the adjustable air pressure inside the chamber 44 above the central piston of the die 60 makes it possible to move the specified piston 60 and the central punch stamp 65 slightly upwards, approximately 0.010 inches. In some presses, this ensures that the total height of all finished cases is always constant and the same. In other more precisely controlled presses, the central piston of the stamp may be secured to a latch 38 or 38 '.
When the upper die plate 40 starts to move upward (Figure 8), the central die punch 65 and the lower panel punch 118 opposite it move upward, while the inner pressure sleeve 80 maintains an adjustable constant pressure in order to hold portions of the piston 26 and 28 between the mating surfaces on the inner pressure sleeve 80 and the annular core of the stamp 98. Such an adjustable pressure of the internal pressure sleeve 80 is maintained while the panel punch 118 moves upward under the action of force, created by the piston of the panel punch 122, so that the peripheral surfaces 163, 164 and 165 form annular sections 17, 18, 19 and 21 on the indicated body 15, as shown in Figure 10. As the top plate of the stamp 40 continues its upward movement, ready the housing 15 is moved upward from the annular core of the stamp 98 and the panel punch 118, together with the upward movement of the external pressure sleeve 55 as a result of the release of the air flow directed upward to the panel wall 16 through the hole 131 of the panel punch 118.
It has been found that the described construction and operation of the tooling 35 or 35 'provides the important and required features and advantages described above on page 1. For example, the compact tooling is adapted to operate on both a single-action mechanical press and a double-action press, and the reduced overall height of the specified equipment makes it possible to use it in most of the high-speed single-action presses currently existing in this area. Another important advantage is that the chamber-air tank 70 and a number of peripherally located air cushioning channels 88 inside the central piston of the stamp 60 provide lower air pressure in the piston chamber 84 and lower air pressure on the piston 82 of the inner pressure sleeve 80 reduces heat production in the upper part of the tooling during high-speed operations, therefore, the specified tooling produces a more uniform and accurate body.
Compressed air inside the air chamber 70 and / or 91 and inside the channels 88 and 88 'also acts as air shock absorbers. These air shock absorbers not only reduce heat production, but are also designed to accurately select the elastic force exerted on the piston 82 of the inner pressure sleeve 80 in order to provide the required exact pressure to press the disk 170 with the internal pressure sleeve 80 against the fixed ring core 98 of the die. snap-in 35 also allows for the delivery of lower pressure air (such as 70-90 psi) to the piston 56 of the outer pressure sleeve 55, and such a finely adjustable lower The air pressure exerted on the external pressure sleeve allows to exclude stretching of the metal sheet, since this sheet slides between the external pressure sleeve 55, the annular core of the stamp 98 and the exhaust and punch stamp in the process of forming the portion of cylinder C.
A further advantage is provided by the design of the central punch of the stamp 65 and the insert cutter 68, as well as the annular core of the stamp 98 and the panel punch 118. For example, the operation and synchronism of the press when working with shaped surfaces on the lower end of the inner pressure sleeve 80 and shaped surfaces on the lower section the skirt 167 of the Central punch of the stamp relative to the corresponding shaped surfaces at the upper end of the annular core of the stamp 98 and the peripheral surfaces at the top panel punch 118 results in reliable production of the housing 15 with a very uniform wall thickness and without the formation of folds or cracks in the sheet metal from which the housing is formed. Said tooling can also form a casing at lower air pressure, which helps to provide a higher casing force. For example, the air pressure in the hole 92 (Figure 1) may be 70-90 psi per piston 56 of the outer pressure sleeve 55, and the air pressure in the hole 92 (Figure 2) to displace the external pressure sleeve and piston 82 of the internal pressure sleeve 80 may be 110-130 psi. This advantage of lower pressure results in lower heating, which is especially desirable when the tool is operated in a press at high speed, such as 650 strokes per minute with a stroke of 1.75 inches. In addition, the shaped surfaces 166 on the central punch of the stamp 65 form an inclined wall with an exact slight angular bend 25, which also increases the strength of the housing coupler. The specified tooling also provides the formation of an inclined panel wall 17 (Figures 8 and 9) and a chamfer 19 in the housing 15 without compression of the sheet metal between the dies, so that these sections of the housing have a strictly uniform thickness and provide a more uniform force of the screed.
Although the device or tooling described herein, as well as the method of operation thereof, are preferred embodiments of the present invention, it should be understood that the present invention is not limited to the specific tooling and process steps described herein, and that changes are possible without departing from the gist and the boundaries of the present invention, and to the extent that they correspond to the attached claims.

Claims (7)

1. A device for forming a circular can body (15) having a cylinder shape from a flat sheet of metal in a mechanical press, said body comprising a central panel (16) connected via an annular panel wall (17) to an annular chamfer (19), usually having a U-shaped configuration in cross section, and through the chamfer attached to the annular arch (28) using an inclined annular wall (23, 24), containing:
an annular punch and exhaust stamp (48) and an oppositely disposed annular first push sleeve (110) for cutting a disc from a metal sheet,
an annular external pressure sleeve (55) inside the specified punch and exhaust stamp, as well as an oppositely arranged annular core of the stamp (98) inside the specified first pressure sleeve,
an internal pressure sleeve (80) inside said external pressure sleeve and an oppositely located indicated annular die core,
a central punch of the stamp (65) inside the specified inner pressure sleeve, as well as an oppositely located panel punch (118) inside the specified annular core of the stamp,
wherein said inner pressure sleeve and said annular die core have shaped surfaces (143, 154) oppositely located and joined together to form an inner inclined wall (26) of the arch,
the specified panel punch (118) has an annular outer shaped surface (163-165), forming the specified panel wall (17) and the chamfer (19) with axial displacement of the specified panel punch (118) with the specified Central punch stamp (65) in one axial direction ,
characterized in that
the specified Central punch of the stamp (65) is equipped with an insertion cutter of the Central punch of the stamp having a radius of curvature of the top (173), distributed along the radius inward from the inner surface of the specified inner pressure sleeve (80) to define the annular space,
wherein said central punch of the stamp (65) comprises an annular portion of the skirt (167) surrounding said insert cutter of the central punch of the stamp (68) and having said shaped outer surfaces (166) protruding inside said annular space and mating with opposed shaped surfaces ( 158, 161) on the indicated annular core of the stamp (98) for the formation of the specified inclined wall (23, 24) with axial displacement of the specified Central punch stamp in the opposite direction.
2. The device according to claim 1, characterized in that said inner pressure sleeve (80) has a shaped S-shaped end surface (143, 144, 147) surrounding a shaped S-shaped end surface (166) in the indicated section of the skirt (67 ) of the indicated central punch of the stamp (65).
3. The device according to p. 2, characterized in that it is equipped with a flat annular gasket (167) located between the specified central punch of the stamp (65) and the specified insert cutter of the central punch of the stamp (68) for the exact selection of the axial movement of the specified insert cutter of the central punch stamp (68) relative to the specified shaped end surface (166) on the specified section of the skirt (167) of the Central punch stamp.
4. The device according to claim 1, characterized in that it is equipped with an air chamber-reservoir (70) connected by an air channel with an inlet for supplying compressed air with adjustable pressure to the specified internal pressure sleeve.
5. The device according to claim 1, characterized in that it comprises a first inlet (74) for supplying controlled pressure air to said internal pressure sleeve and a second inlet (92) for supplying substantially lower pressure air to said external pressure sleeve (55).
6. A method of forming a circular shape of a cylinder-shaped tin can from a flat sheet of metal in a mechanical press, said casing comprising a central panel connected by an annular panel wall with an annular chamfer, usually having a U-shape in cross section, and through said a chamfer attached to the annular vault using an inclined annular wall, comprising the following stages:
cutting a disk blank from a sheet,
clamping an annular portion of said pressure-adjustable disk between the annular core of the stamp and the opposite annular external push sleeve,
pulling the cylinder from the central portion of the disc using the central punch of the stamp to the clip the inner pressure sleeve of the inclined annular portion of the cylinder to the annular core of the stamp and the formation of the inclined inner wall for the annular arch, characterized in that
initiating the pulling of the cylinder from the central portion of the disk with the insert cutter inside the annular portion of the skirt of the central punch of the stamp located inside the annular inner pressure sleeve,
continued drawing of said cylinder carried out by the interaction of the insert cutter of the Central punch stamp with the opposite panel punch for completing the formation of the cylinder simultaneously with the fitting of the shaped external surface on the skirt section of the central punch of the stamp with the shaped inner surface on the annular core of the stamp to form an annular inclined wall of the body, and
the implementation of the movement of the specified panel punch and the central punch of the stamp while continuing to clamp the annular portion of the cylinder between the inner pressure sleeve and the annular core of the stamp to form the central panel and the panel wall, as well as the bevel with surfaces on the peripheral portion of the panel punch.
7. The method according to p. 6, characterized in that it includes the step of placing a removable flat annular gasket between the central punch of the stamp and the insert cutter of the central punch of the stamp to position the insert cutter of the central punch of the stamp on the central punch of the stamp inside the skirt section of the central punch of the stamp.
RU2013111458/02A 2010-09-20 2011-09-15 Method and device for can body forming RU2575889C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US12/924,077 2010-09-20
US12/924,077 US8573020B2 (en) 2010-09-20 2010-09-20 Method and apparatus for forming a can shell
PCT/US2011/001590 WO2012039747A2 (en) 2010-09-20 2011-09-15 Method and apparatus for forming a can shell

Publications (2)

Publication Number Publication Date
RU2013111458A RU2013111458A (en) 2014-10-27
RU2575889C2 true RU2575889C2 (en) 2016-02-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1722656A1 (en) * 1989-10-30 1992-03-30 Краматорский Индустриальный Институт Method of making hollow articles
RU94045276A (en) * 1993-01-29 1997-02-27 МН Машиненбау унд Инжиниринг Мартин Нуссбаум (CH) Method of making aluminium cans for drink and food and plant for performing the same
RU2211107C2 (en) * 1998-03-04 2003-08-27 Корус Стал Б.В. Method for making preserve cans by thinning walls

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1722656A1 (en) * 1989-10-30 1992-03-30 Краматорский Индустриальный Институт Method of making hollow articles
RU94045276A (en) * 1993-01-29 1997-02-27 МН Машиненбау унд Инжиниринг Мартин Нуссбаум (CH) Method of making aluminium cans for drink and food and plant for performing the same
RU2211107C2 (en) * 1998-03-04 2003-08-27 Корус Стал Б.В. Method for making preserve cans by thinning walls

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