JPS58187219A - Large-sized inverted stack press and method of molding cup - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a large press for forming thin-walled, hollow, drawn containers from previously coated material by performing a series of preforming operations in the press. More specifically, it concerns a press capable of producing approximately 700 containers per minute. The container is formed by operations such as material forming, cup forming, drawing, redrawing, shaving, and fin removal. In the past, there were presses that produced such hollow drawn containers at a rate of about 125 per minute. This press is described, for example, in US Pat. No. 4,262,510. Such presses were limited in capacity by their mechanical construction and the nature of the materials entering and exiting the press.

Additionally, there have been structures that more efficiently produce such containers by using multiple presses with transfer conveyors placed between them. These structures require synchronization of multiple presses, occupy a large amount of space, and have high construction and operating costs.

Therefore, since such systems require at least two presses, one press is susceptible to the shortcomings of the other press. That is, if one of the presses becomes idle, the other press also becomes idle. Similarly,
If the conveyor breaks down, production will stop.

A container produced by the press of the aforementioned US patent is described in US Patent Application No. 234,452, which describes in detail the type of container and its construction and use. Since such containers are consumable items that are used only once, they need to be made as cheaply as possible and therefore need to be made on high speed machines. Similarly, such containers are generally made of pre-coated materials, such as those described in US Patent Application No. 230,610. Therefore, containers need to be manufactured and processed at high speeds, but with great care to avoid damaging the thin walls and fragile coatings during preforming operations.

In the past, for example, U.S. Patent Application No. 56.704
It has been proposed or further developed to move a partially formed container through the tools of a press for gradual shaping as described in U.S. Re. Patent No. 29.
No. 645 describes a transfer device which reliably prevents displacement of containers, i.e. ensures reliable handling, during the transfer of containers from one working station to the next. U.S. Patent No. 1,935.
No. 894 describes an intermittent transport action similar to that of the present invention, but which is not uniform or continuous. In this patent, a mechanism for transporting partially pultruded and repultruded containers is streamlined so that more layers of such a transport mechanism can be included within the press opening between the tools.

It is also important that the press be small and compact enough to produce containers at the required speed. In large presses, a series of improvements in various parts of the press improve structural integrity and operational efficiency.

More specifically, operations that require large tools and large amounts of space can be performed on one side of the press crown, and operations that can be done closely together can be performed on another side of the press crown, thereby reducing the overall dimensions in the plane of the press. It is necessary to minimize the amount of U.S. Pat. No. 4,026,226 describes an inverted press that performs forming operations above and below the crown so that different operations can be performed separately on the same press. This press forms the tab above the crown and the end below the crown. The tabs are mated to the ends under the crown. This press not only saves on construction costs, but also simply separates tooling to maximize the horsepower required to operate the press. More specifically, by utilizing both the up and down strokes of the press, peak load requirements are reduced and the loads on the drive members are more balanced.

Container handling becomes important in order to be able to perform many operations at different heights on the same press. Processing techniques, apparatus, and methods have been described in connection with the inverted press described above. To be more specific, in the end press,
The tab is carried by its base metal to the opposite side of the crown and mated to the end. In the conventional inverted container press,
The partially formed container is transferred by vibrating fingers supported on a moving transfer rod. In this press, the movement of the piece parts during gradual forming is precise, but the mechanism is large and complex. Simple mechanisms for multi-lane transport in large progressive presses are not found in the prior art.

In order to minimize the overall dimensions of such large presses for high-speed multi-forming, it is necessary to drive more than one part of the tool away from a part of the crankshaft using a common drive element, thus reducing the need for connecting rods. , to limit the number of drive drums and the like. This feature is shown to some extent in the above-mentioned inverted end presses, but in larger presses having multiple forming areas above and below the crown, this feature is shown in more detail. Furthermore, instead of being stacked one on top of the other, the clamping and forming rams may be stacked side by side, or, as is conventional, one ram may be placed within the hollow of another ram and the first
ram is wedged onto a second ram so that the tolerances of the side-by-side rams and the tolerances of the support ram into which this ram is inserted are cumulative. In this case, the wedging systems are independent of each other so that tolerance problems are minimized. Furthermore, wedging systems generally become contaminated to the extent that the external or exposed lubricating oil is exposed to environmental influences and contaminants, such as the surrounding environment of the factory or the presses used to make the product. This exposed lubricating oil in the wedge locking system can cause openings during cleaning and loss of lubricating oil, requiring special care in creating highly hygienic food containers. Similarly, the use of a cushion cylinder that goes into the container and surrounds the tool to minimize height is unique. A drive device for the worm and gears is provided inside the crank chamber for the press. A worm roller bearing is set on the side of the crank chamber so that lubricant for the bearing is forced into the bearing from above and taken out from below. For this arrangement to be effective, it is necessary to control the flow of oil through the bearing to prevent agitation, which would cause oil degradation and overheating. The size constraints of the vertical press, the strength of the crankcase walls, and the required support of the bearings preclude the use of large passageways to provide adequate flow for draining oil from the roller bearings.

Each press frame is made up of a series of individual components. These components are generally accommodated by the need to maintain the required tolerances for the equipment used to manufacture the parts of the press frame and the precision necessary to ensure efficient and reliable operation of the press. Presses are not known which are individually working units for installation or testing purposes, but which are composed of a plurality of subassemblies that can be connected to each other for cooperation. Furthermore, no prior art provides an opportunity to individually inspect such subassemblies of large presses prior to complete assembly or during partial repair.

One object of the present invention is to provide a compact press that will form multiple shapes at a rate of about 700 pieces per minute from pre-coated material.

Another object of the invention is to provide a simplified container conveyor for use in conjunction with such a press.

Another object of the invention is the manufacture of such a press,
The objective is to provide structural features that facilitate testing, repair and assembly.

Another object of the present invention is to provide a transfer mechanism that is compact yet capable of handling a series of lanes of containers traveling through a polyacid station.

Another object of the present invention is to provide a compact combination ram constructed to maintain minimum tolerances of controlled ram v/F movements.

Another object of the invention is to provide a cushion cylinder that can be conveniently used with such presses to provide compact tool support.

Another object of the invention is to create a clean, compact,
An object of the present invention is to provide an improved wedging system that is reliable, easy to manufacture, and simple to assemble.

Another object of the present invention is to provide a technique and arrangement of components to provide adequate flow of lubricating oil through a high speed roller bearing.

In accordance with the above objectives and to solve the problems of the prior art,
To provide a multi-working inverted press having a crankshaft below a feed line for driving both a ram in a lower cup forming press and a double acting redraw press mounted above the lower ram. The cup-forming press processes the rolled sheet into a cup shape, and this cup is conveyed to an upper press that sequentially performs operations such as multiple drawing, redrawing, profiling, and fin removal. In particular, the upper press has two redrawing stations (the second station also performs the profiling) and a finning station. Both the cup forming press and the upper press have ram strokes, with one ram stroke shearing and/or clamping and the other ram strokes pulling, redrawing or finning. The cup extraction ram has a 9-stroke and is driven directly by the crankshaft through a pair of connecting rods. The material and clamp rams in the lower press (at The two rams for tightening and fining have the same 9" stroke as the cup-forming ram, and the redrawing ram has a 12" stroke. The tightening for the upper press is The ram is driven via a vertical tie rod that is mounted to move with the cup forming ram in the lower cup forming press.The drawing ram in the redrawing press is independently driven by a crankshaft.

This inverted press maximizes the use of the press by cupping the material below the crown and redrawing it above the crown.

More specifically, the first operation (forming the rolled sheet into stock and forming it into a cup shape) takes place below the crown of the place. The formed cup is laid down (tilted open end downwards) and then conveyed above the crown to an upper press where it is drawn, redrawn and the bottom profiled, and finally the flange is removed. Cut the fins around it using a dice. One advantage of this method is that the largest diameter material is cut in a separate part of the press;
This means that the spacing between the center lines of the forming parts can be made closer, and the overall dimensions of the press can therefore be reduced. Another advantage is that blank forming and cup forming are performed in one stroke of the inverted press and other forming operations are performed in the other or opposite stroke. More specifically, the cup is moved either from above or below by a magnetic conveyor system which inverts the cup so that the opening is oriented upwardly for subsequent forming operations.

As previously mentioned, blank formation and cup formation take place in the lower part of the press, and then a magnetic conveyor system transports the formed cups to the upper part of the press, where the first drawing and redrawing are carried out. Then, the scraping and fin removal are performed gradually. At the bottom of the press, the cutting edges of the blank define the distance between the centers of the blank forming and cup forming tools for each lane. This center-to-center distance is a function of the size of the largest container produced in the press and is therefore variable depending on the container being produced, maximum coil width, and minimum scrap. In the upper part of the press, the spacing between adjacent pulling and repulling tools is not limited to the large diameter of the cutting edge of the material, and the lanes can be advantageously positioned close to the upper support columns, for example. for maximum rigidity. The magnetic conveyor system has variable spacing between the cups and
and a second re-pulling tool for drawing out at regular intervals with a profiling tool and a fin removal tool. In further detail, it is a feature of the invention that the conveyor can be adjusted to handle containers of different sizes with different tools having different center-to-center distances in the upper and lower parts of the press frame. In addition, upper and lower magnetic belts and a set of laterally positioned rollers are provided which not only allow the containers to be transferred from the lower press to the upper press, but also allow the containers to be moved as necessary to compensate for the difference in spacing. The magnetic Konbaya system, which includes Bu Feng, is an important feature.

A cascading push-feed technique is used to transport the received partially formed containers from the magnetic conveyor system to a first redrawing station and then to a subsequent redrawing and profiling station. This technique uses a magnetic drive belt positioned to carry the containers slightly tilted relative to the vertical axis of the tool, thereby feeding each container axially into the punch and die. When pressed, it will occupy a vertical position.

Therefore, only the container below the punch is affected by the stroke of the ram. Adjacent containers arranged in a row to be fed are crushed or touched by a punch that pushes the containers through a re-drawing die into a container of reduced diameter that increases the height of the container. There isn't. The redrawn container is then placed in a second die positioned below the die.
is picked up by a magnetic drive belt and likewise conveyed to the next or second redrawing punch. Second Re-Drawing - The profiling station first re-draws the container downwards but without passing through the die and then contours the bottom of the container by pressing the bottom of the container against the punch and pushing upwards. . The shaped and redrawn container is released when the mince is retracted, and since the container has an unfinned flange, the container is gripped by vacuum fingers and moved into a finned position. It will be done. The finning operation of the flange allows the container to pass through the finning die.

The scrap produced by fining remains on top of the die as the container is captured by a magnetic conveyor belt positioned below to transport the container from the press.

In its movement, the vacuum fingers are moved upwardly toward the next container and avoid the fin scraps as they settle on the top of the fin die mold. One advantage of this system is the ability to transfer containers at high speeds. Furthermore, in this large inverted press capable of processing up to 6 lanes, the mechanism is simple and uses a common system for molding multi-lane containers with modular dimensions and removing scrap created by fining. efficient enough to use.

The entire structure of the press is divided into 6 self-contained parts. More specifically, each self-contained section is individually assembled and tested on a public floor and then shipped to a manufacturing site where the components are assembled for operation despite having a common drive for the upper and lower rams. The subassembly at the bottom is the main drive unit, which includes a motor, a reduction gear, a stepping drive, a flywheel clutch, and a bunkie.
and a steering arm. The construction of the press is box-shaped and opens upwards to form a sturdy support for the crankshaft bearing and lubricating oil collector. The crankcase includes a flow path toward and away from the support for the worm gear roller bearing.

These passages are connected to an input 7 pump and an output pump such that the incoming oil flow is adequate to cool and lubricate the roller bearings and the output flow is controlled by a suction pump capable of dry operation. That is, a suction pump is used to actively drain oil from the bearing to prevent oil from accumulating and agitating and overheating the bearing.

The center unit includes support columns connecting the upper and lower parts of the press and when combined with the bottom unit forms a complete stock forming and cup forming press.

The cup-forming punch slide or arm is actuated from the main crankshaft by a rudder arm, and four cams on the cup-forming ram are actuated by the clamp beam through a knuckle assembly, which is also used for maintenance and cleaning. Therefore, the tice mold can be lowered or opened independently.

The upper part is the first and second redraw and several edges of the press and contains a punch and a clamping ram, the clamping arm being actuated by a rod connected for stroke movement with the cup-forming ram. . The redrawing punch ram is driven via a connecting rod slide driven by the steering arm (which extends partially into the side frame of the cup-forming unit. Therefore, the six components of the press Since they are made separately and are integral units, they are tested separately before final assembly.

Similarly, the bottom and middle units are run and tested together.

The technology at the top of the press is used to keep the overall height of the press as low as possible. Requires both tightening and re-pulling rams. In order to provide these rams with sufficient vertical section and to minimize the overall height of the press frame required to accommodate the rams, an overlapping method is employed. More specifically, the placement of the redraw ram between a pair of split clamp arms provides a suitable overall vertical height of the rams, but keeps the overall ram height as low as possible. Typically, the rams are stacked one on top of the other, approximately doubling the vertical height of the ram. In the present invention, the overall height of the press is reduced while each ram is independently wedged at each end to minimize unnecessary movement tolerances of the ram. The central re-punch ram has a long stroke and is connected by a cantilevered support to the re-punch tool, which is housed in the same hollow hole in the ram for tightening. .

The top of each large inverted press has its own wedged ram. The wedging system allows all of the lubricating oil returning from the top of the support to return into the cylindrical support tube, thus preventing oil contamination or overflowing the tool during hand-hold time. Each hollow cylindrical support tube contains all the oil flowing back into the crankcase. More specifically,
A lower support is positioned at the top of the press for each support and the upper support is supported in the crown of the press in such a way that it floats in an axial position, thereby allowing for misalignment and eliminating the need for alignment prior to machining. There is an upper support. A cylindrical putter is supported around the support tube and supports the ram by keying the support tube to the bushing. Six of these units are used on each side of the top of the press to support each end of the three rams.

A clamp ram supported at the top of the press has an open passageway for a hollow redrawn nitrogen cushion that holds the container in one hollow shape with a punch. Prior art systems use a series of cylinders that bias the clamp arm and are connected to the main reservoir. The present invention includes a self-contained integral cylinder and reservoir supported within the clamp arm, thus minimizing the overall height of the nib. The invention also simplifies the overall construction of the press. Each cushion cylinder is associated with a coaxially positioned tool punch contained within the central cavity of a hollow clamp ram cushion.

The cushion cylinder includes features that allow it to be easily cleaned and assembled with the ram for quick alignment during tool changes for containers of different sizes. More specifically, the ram is provided with a cylindrical pocket that accommodates a cushion that facilitates axially adjustable positioning of a tool supported within each hollow cushion.

Upon rendition, the pre-coated and rolled sheet is automatically and intermittently fed to the bottom of the press.

A flangeless cup is formed by forming a sheet into a material and molding it into a cup using a material forming shear member and a tool consisting of a punch and a die. Several lanes of cups, up to a maximum of six lanes, are formed and transported magnetically from the bottom of the press to the redrawing point at the top. The cup is carried by the transfer conveyor through 180 DEG from the position with its opening facing downward, and when it reaches the redrawing station, the opening is facing upward. The cups in each lane are fed by a redraw press to a first push-and-feed station where they are conveyed axially to a punch and die die in a first redraw station.

As the redrawing section is lowered, the cup is tightened by the die and withdrawn and dropped into position below the die and onto the magnetic conveyor belt. The re-drawn containers are each picked up and forced together and fed to a second re-drawing and profiling station where partial redrawing is carried out and the bottom of the container is then profiled. In this case, the redrawn container is not completely pushed through the die, so that the flange remains. A die on the punch traces the bottom of the container and it is carried back upwards and discharged above the die. The container is then transported by vacuum force for the final operation of finning the flange.

The fining operation allows the finned containers to pass through the die and be captured by a magnetic conveyor and removed from the press. The ring-shaped scrap generated by fin removal and the remaining sheet material waste are discharged separately.

FIG. 1 is a perspective view of the press 20 above the floor, viewed from the rear with a portion cut away to show the internal operative components. The bottom of the press 20 is shown in detail in FIGS. 2, 7, 8 and 9 and includes a crank chamber and its drive 30, which drive has an end bearing positioned in the crank chamber 33. 62 supports the crankshaft 31 at each end thereof. A gear 35 driven by a worm is supported at the center of the crankshaft roller 1, and this gear is also supported by a side bearing 32 supported by the crank chamber 33 and the crankshaft 61.
It is also supported by eight. The worm 34 is supported on the crankshaft 31 by a shaft 36, and the shaft 66 is supported by a roller bearing supported on the wall of the crank chamber 63. In a known manner, an R-rut type, drive member and motor are provided for operating the press. The crank chamber 66 in the preferred embodiment is positioned in a recess below the ground and has a flanged upper surface 37 compressed to support the components of the press that the crank chamber 36 supports as shown in FIGS. 8 and 9. It has a hollow box-like structure with an upward opening.

A system for driving the ram of the press is mounted eccentrically on each side of the crankshaft 61 (FIG. 9). That is, between the crank bearing 62 and the gear 65 there is a drive for the clamping and forming rams of the press on each side of the crankshaft. It is supported on the shaft 31 near the crank bearing 32 and just inside the crank chamber 36.

In a preferred embodiment, the eccentric re-extraction drive 58 has one
It has a stroke of 211 and includes a connecting ring 38a to which the counterweight is attached, as shown at 38b. A drive device 39 for eccentric cup forming and tightening is provided between the eccentric re-drawing drive device 38a and the gear wheel 5, and this drive device is mounted with a counterweight at the location indicated by the symbol 9a. It has a connecting ring 39a. The connecting ring 39a drives a ram to perform tightening and cup forming, which will be described in detail later.

The middle part 40 of the press 20 has a pair of side parts 40a and a top part 40.
b, which together form a structure that rests on the flanged upper surface 37 of the crank chamber 33, and the intermediate part 4
0 includes a pair of buttress-like downward supporting flanges 40c, which support an intermediate portion 40 that is the bottom surface of the structure of the press (FIGS. 1 and 2).
. In the intermediate section 40 rides a lower press ram 41, which press ram includes a downwardly directed U IJ coupling/connection 41a pivoted to the upper end of the connecting ring 39a, in the preferred embodiment the lower press ram 41 has a stroke of 9" (FIG. 9). The ram 41 is supported in a conventional manner and moves vertically to a limited extent in the intermediate section 40 by means of a flat gino plate and a central column with a nosing. Lubrication between the plate and the central column is provided below the forming zone of the ram 41 so that the lubricating oil can be discharged directly into the crank chamber 66 without interference from the formed article.On the lower arm 41 there are a pair of upright supports. Shoulders 41b extend, and these shoulders extend over the sides 40a of the intermediate section 40.
are positioned at each end of ram 41 near . A pair of connecting rings 42 extend upward from the support 41b and connect the block 4.
4, it is drivingly connected to the upper part of the press 20.

Similarly, the upper end of the connecting frame 38a supports a prior art slide member 46, which is box-shaped in cross section and guided by a sheave within the intermediate section 40 to reciprocate just inside the slider 40a. .

Slide 9 member 46 is positioned between the inside of side 40a and the outer end of ram 41. The aforementioned lubricating oil can be easily discharged so as to avoid the ram 41 and return to the crank chamber 66. The lower end of the slide member 43 includes a τJ-link-pin connection part 43a, and the upper end, which will be described later, is connected to the press 2.
o includes a threaded opening 43b connecting to an upper drive for the center or redraw ram located at the top of the o. The member 46 extends upward through the intermediate portion 4D of the press 2o. In a preferred embodiment, the travel of member 43 is 12''.

The top 45 of the press 20 is open in the middle and includes a base 46a, a pair of upright posts 46b and a top 46c (first
(Figure) Consists of a pair of box-shaped side members 46. Box-shaped side member 4
On top of 6 is the top 4 which connects both side members 46 to each other.
7 is supported.

With this structure, the inner side of the top part is left open laterally at the space between the side columns 46b.911
Upper rams 48 for tightening and redrawing on each side of the press 20 in the central space between the one-part columns 46b.
There are six wedging systems 48 supporting 50 individually. The wedging system 49.50 has a ram 49.5° at each end of each associated ram 49.5° (FIG. 2).
are supported side-by-side for parallel reciprocating motion along a wedging system 48. For tightening, use two (
There are upper rams 49 (front and rear), and an upper ram 49 is installed between these rams for drawing purposes (FIG. 6). A connecting ring 42a extends through a thrower 42 provided in the press section 40 and extends to an outer ram 49, which is driven by a block 44 and an extension tube 44a (FIG. 2). The central portion of the wedging system 48 is arranged to directly drive a ram 50 when the latter is connected to the member 4 as described below.

Referring to FIG. 10, which is a partially cross-sectional side view of the wedging system 48, the relationship of the wedging system to the column 46b, the base member 46a1 and the top member 47 is shown. is the indication. 1 for holding the column 46b, the top member 47, and the base member 46a, respectively.
A pair of connecting rings 51 are provided which clamp the box-shaped side members 46 together leaving an internal opening for accommodating the six wedging systems 48.

Each connecting ring 51 is arranged at a corner of the press 20 and the press part 45
．． 40.50 and is positioned to extend from the top 47 and hold the press portions connected. Press section 6
0.40.45 are each individually built and tested prior to final assembly, and such segmented construction facilitates manufacturing and repair. Similarly, the drive system is divided between the press parts 60 and 40 as shown by 38a and 39a (and between the press parts 40 and 50 as shown by 43b and 44). It is composed of an inner and an outer sleeve, the other being compressed, and therefore the load divided between these sleeves can be easily handled without distorting the connecting ring 51. To facilitate the assembly of the press 20, the connecting ring 51 is heated. When the nut is expanded and cooled, the connecting ring 51 is preloaded.

Although only one side of the wedging system 48 is shown in FIG. 10, it should be understood that the opposite side of the system is the same. 46a includes an L bushing 52.5 for support in vertical relationship between the side member 46a.There are three sets of upper and lower bushings 52.53 for each side member 46, thus six tubular Members 54 are supported parallel to each other and housed within the open center of side member 46. Tubular member 54 is free to move vertically relative to its associated bushing 52.5 in an axial direction. Placed rod 4
3c passes through the screw hole 43b and is connected to the tubular member 4 C, extends along the axis of the central tubular member 54, and is connected to the tubular member 54 by a fastener 55 at the top of the tubular member.

Top fastener 55 is used to pull ram 50 downwardly into contact with slide 46. The ram 49 is moved through the block 44 by the tubular member and the connecting frame 42a. Therefore, the ram 49, the block 44 and the rod 4
A central wedging system 48 positioned between the two outer tubular members 54 has a 12" stroke caused by the rod 42a extending through the spacer 42 connected to the outer tubular member 4a. is driven. Similarly, ram 5
0 is moved by member 45 and rod 43c extending upwardly through the central jib of wedging system 48. More specifically, the ram 49.50 has its end 50a14
9a, each of which is restricted from vertical movement in parallel with the tubular member 54. The ends 49a, 50a of the rams are keyed by keys 56 and move up and down with the tubular member 54 as the rams 49,50 move vertically from the controlled reciprocating members of their respective drive lines.

The bushings 52,56 are tightened by bolts 57 to the respective supports 47,46a so that the upper bushing 52 is easily aligned axially with the lower bushing when the lower bushing 53 is positioned within the opening in the base 46a. Next, the bolt 57 is bolted or tightened in a fixed manner. A sealing ring 58 is provided between the tubular member 54 and its ram. A sealing ring 58 is positioned directly above the ram and cupped toward the bushing 52 to form an upwardly extending apron 59 that captures oil pumped between the bushing 52 and the tubular member 54. perform the action of In particular, after the oil passes between the bushing and the tubular member,
The central hollow tubular member 5 passes through the hole 54a provided on the side of the
4 and therefore flows downwardly through the location where the member 54 is located and the crank chamber 36 returns. Therefore, bushing 5
The upper lubrication system for the gap between 2 and the tubular member 54 is sealed against the outside air. Similarly, the lower lubrication system for the bushing 56 includes a sealing ring 61 mounted on the top of the bushing 56 to prevent leakage of oil carried in the gap 1 between the bushing 56 and the tubular member 54. The gap between the bushing 53 and the tubular member 54 is filled with pressurized lubricating oil (
(not shown): f is supplied. This gap ends at its lower end inside the bushing 53, so that the lubricating oil flows downward along the respective drive system passages and returns to the crank chamber filter 6. The O-ring 62 around the lower bushing 53 seals this bushing to the base 46a so that no lubricant can escape.

A sealing ring 58 is also used to clamp the key 56 between the ram end 49a or 50a and its associated tubular member 54 as shown in FIG. Also used for this purpose is a series of clamps (Pol) 58b. Each ram can be moved by controlled vertical movement of the tubular member 54 according to a lubricated wedging system 48.

Wedge system 48 is provided with a top sealing cap and a breather tube 48a positioned on top 47.

Each clamp ram 49 is elongated and has a larger dimension in the vertical direction than in the horizontal direction. Each clamp ram 49 is provided with a series of vertically arranged cylindrical passages which move the redrawing tool, and more particularly the partially formed container, along with the ram for redrawing. and tightening is to accommodate the member. Above the rams 49 is a pair of laterally spaced apart beams 96 connected between the rams 49 and with gas springs 60 mounted on the sides of the rams 49 as shown in FIG. It is positioned below the top 47.

FIG. 11 is a partial cross-sectional view of press 200 viewed vertically at a point in the plane of the vertical axis of ram 490 cylindrical opening 49b. The aperture is shown at 491 in FIG. 11 and accommodates a unique cylinder assembly 6 used to clamp the partially formed container during the first and second redraw operations. It is accommodated. More specifically, the cushion cylinder 66 includes a centrally located hollow inner tube 6.
Contains 4. Inner tube 64 is symmetrical about its central horizontal plane. That is, the inner tube 64 is such that one end thereof is used in place of the other end.

The reason for this is that the upper and lower working surfaces 64a are in a sealing engagement, and if the bottom surface is the surface over which movement occurs, the bottom surface will wear out faster than the other surfaces, thus doubling the service life of the inner tube. This is because it can be turned upside down. The cushion cylinder 66 is a concentric outer tube 65 cut from a straight tube.
The outer tube 65 is held in coaxial spaced relationship with the inner tube 64 by a soldered mounting cap 66 positioned at the top thereof. Rolling 66a is used to seal tube 64,65 and is supported in a groove in mounting cap 66. Similarly, tube 64
．． At the lower end of 65 is a combination of Slydring 67 ((table varnish, champagne, ant 9, canno) - 7f (W, S, Shamban & Com
(pany))) is provided, the assembly being disposed in a concentric space between the inner surface of the outer tube 65 and the outer surface 64a of the inner tube 64. A bottom cap 68 and its locating ring 68a attach the bottom of the outer tube 65 to the ram 49, while a mounting camp 66 attaches the upper end of the outer tube 65 to the upper end of the ram's cylindrical opening 49b. Similarly, ring 68a and cap 68 hold tubes 64.65 in concentric spaced relationship. The inner tube 64 is held vertically at each end by mechanical connections. Gas pressure (nitrogen) is present in the annular space between tubes 64,65.

The Slydring™ seal is attached to the locking re-pull sleeve assembly 69 and the nitrogen introduced into the space between the tubes 64.65 causes the Slydring™ seal to tighten and carry downwardly through the middle tube 64.65. compressed during upward movement relative to the downward movement of ram 49. Sleeve assembly 69 and SlyllringTM seal 67
A mating surface not shown in the cross-sectional view of FIG. 11 engages with the connecting portion between the two, thereby establishing the connection. Accordingly, the ultimate downward movement of the redraw sleeve assembly 69 is controlled. A gas escape passageway (not shown) is connected between the space for nitrogen gas and the gas reservoir so that the redraw sleeve assembly 69 can be tightened against the partially formed container in a known manner. can control the amount.

The hollow center of the re-pulling sleeve 69 is punched into the punch assembly 7.
0 is passing. Each punch assembly 70 has a cantilever support hanger 5 extending from ram 50 to ram 49.
0b supports the punch assembly 70 to have a 12" stroke of the ram 50. The cantilever hanger 50
b includes a pair of spherical support bushings 71 spaced apart from each other on the hanger such that a punch drive ring 72 moves downwardly through the center of the cushion cylinder assembly 66 to provide a first support bushing for each punch 70; When connected to and supporting the re-pull punch 76 (FIG. 11), it serves to align the punch drive ring 72 with the axis of the cushion cylinder assembly 66.

The pusher/guar 4 and its holding cap 75 are mounted on a mounting cap 66 and fixed to the ram 49 by the cap 66 and a retaining screw 75a. Therefore, the punch drive ring 7
2 are further axially aligned for reciprocating movement relative to cushion assembly 63 by bushing 74. In the preferred arrangement, punch 73 moves 12" strokes of ram 50 while redraw sleeve 69 moves 9" strokes of ram 49. On both sides of the ram 500, cantilevered hangers 50b extend in the direction before and after the place 200, and these hangers are used to drive the /ξ mincing drive ring 2 for the first and second re-pulling profiling tools for each lane in the first re-pulling. It is used for the punch 73 of the part and supported in the same manner as described above. More specifically, the partially formed container is moved laterally through the press in a direction that extends the rams 49.50. When the front ram 49 is lowered, it carries a cushion 7 cylinder assembly 66 (up to 6 lays/tools and front and rear fastenings are sufficient for the ram 49). Similarly, Ram 50
supports up to six punch assemblies 70 on each side with cantilevered hangers 50b, and each mince assembly 70
pass coaxially through the hollow center of the cushion cylinder assembly 63. The partially formed cup or container in the lower cup forming section 40 is then first punched 7 to remove the cup from its respective drawing die (FIG. 6, 4).
5 and 6) and are redrawn into tall containers of smaller diameter. Then the container is filled with ram 5
0 to a second redrawing-profiling point, where the rear or other ram 49 is a cushion coaxially supporting another second redrawing punch. The cylinder assembly 66 is supported in alignment for redrawing the partially formed container into a taller, smaller diameter container.

Also shown in FIG. 1 is the rear side of the press 20 which performs the second redrawing. FIG. 6 shows the ram 50 divided by the center line showing the ram 50 at the bottom dead center of its stroke on one side of the figure and at the top dead center of its stroke on the other side.

A horizontally disposed support beam 76 positioned above the press 20 supports the weight of the ram with connectors 72a. In a manner similar to ram 49 and gas spring 60, connector 72a extends outwardly from beam 76 to front and rear gas springs 77. Each gas spring 77 is attached to the support beam 7
It has a drive rod 77a connected to 6. Therefore,
The return stroke of the first redraw punch 76 caused by the ram 50 is balanced by a gas spring 77.

As mentioned above, the container is moved from the front to the rear at the top 4 of the press l.
5 and is transferred through the center 40 of the press 20 from the rear to the front. This process is shown in Figures 6, 4, and 5.
6 and 12, in which the transport system 80 from the center 40 of the press 20 to the top 45 of the press 20 is connected to a lower magnetic drive belt 81.
and an upper magnetic drive belt 82. Between the belts 81 and 82 are eight magnetic rollers 86, which are mounted in a rotationally side-by-side relationship (clockwise) so that the containers are passed from roller to roller. The metal cups shown in Figures 6, 4, 5, 6 and 12 are held at their bottoms by magnetized rollers 8 or magnetic bolts 81 or 82. The edge-to-edge spacing between the lower belt 81 and the upper belt 82 allows lateral movement to align the containers so that they follow a path from the lower belt 81 to the upper belt 82. That is, at least one lane of containers needs to be moved laterally. Each lane has its respective set of guide bars 84, and these guide bars are co-located with each other. They cooperate so that the containers are aligned with and received by the appropriate upper magnetic belt 82 (only one lane is shown in FIGS. 6 and 12).

FIG. 6 is a side view of the container conveyance system 80 taken along the plane of line 6=6 in FIG. 1, cutting through the center of the press 20. The entire operation of moving the container to either the intermediate section 40 or the upper section 45 will become apparent along with the various operations that occur in the press 20 for one lane as a result of the support of the tool by the front and rear upper rams 49 and rams 50. Starting from the lower left corner of FIG. 6, the rolled strip sheet is intermittently introduced into the press at a predetermined feed line and moved from left to right. The sheet is first formed into a blank between a die type shear ring 85 and a punch type shear ring 86 in a known manner. The die-shaped shear ring 85 is moved by the ram 41 through a series of toggle knuckles that are connected to the ram 41.
(Fig. 8).

The knuckle is generally designated 87 (Figure 8) and resembles a toggle in its action. More specifically, Ram 4
On each side of 1 there is a lower toggle link 88 and an F toggle link 89. Each lower toggle link 88 is pivotally attached to the inside of the side wall 40a, and its upper end is pivotally attached to an upper toggle link 89. A roller type follower 90 is supported on the surface of the cam 41c at the pivot portion of the toggle links 88, 89. The upper toggle link 89 is pivoted to a support 91 that moves the punch shear ring 86.

Therefore, the stroke of the blank forming ring for shearing the material into blanks is greatly reduced. Support 91 also clamps the blank during the cup forming operation. The lower toggle link 88 is attached to the side wall 40
It is tightened or loosened by a jack screw 91a connected to a. By loosening the link 88, the low follower 90 moves beyond its normal stroke to the cam surface 41c.
can be separated from Therefore, knuckle system 87
can be folded so that clearance is maintained in this part of the tool.

The hollow center 85a of the quiz-shaped shear ring 85 includes a cup-forming punch 92 connected to the ram 41 and moving through a 9" stroke. A knuckle system is used to lock the material during the cup-forming operation after the shearing operation. This is done by clamping the blank between the shear ring 85 and the tool face 93. Thus, the punch 92 pulls the blank when it is pressed against the magnetic belt 81 below, forming a wall having an integral bottom but no flanges. Form into a thin hollow cylindrical cup (Figure 6).

Belt 81 moves from right to left to carry the cups in the general direction of movement of the sheet as it enters the stock forming and cup forming tool. Immediately outside the press 20, the magnetic belt 81 curves upward and the cups are conveyed to a first of the rollers 8, at which point they are aligned with the leading edge of the magnetic drive belt 82. Guide rod up to 8
I was forced to move between 4. As shown in FIGS. 6 and 12, the belt moves clockwise.

Magnetic belt 82 carries the cup upwardly before curving within the top 45 of press 20. As can be seen in FIGS. 6 and 12, the cup is made to open downwardly, and as the transfer system 80 moves the cup, it rotates through a 180° arc so that it opens upwardly. The magnetic drive belt 82 is shown in FIGS. 6, 4, 5, and 6.
As shown, it extends slightly upwardly at an angle of rAJ. As the cups are moved into the press, they are retained by a detent mechanism 94, which allows a sufficient number of cups to be delivered by the belt 82 to provide the required push and feed to the first redraw point of the cup press. More specifically, the cup shown in FIG. The bolt 82 is angled upwardly so that the cup in the holder 95 has its axis aligned with the bolt 82. punch 7
The next adjacent or pressed cup aligned with the axis of the drive belt 820 has its axis perpendicular to the surface of the drive belt 820. The upper edges or mouths of these two containers are spaced apart from each other because their side walls are at an angle of the angle rAl of the root.
This leaves room for tool movement during forming.

Referring again to FIGS. 3, 4, 5 and 6, the container is forced through a first redraw die 96 which increases the height of the container but reduces its diameter.

At the bottom dead center of the first redraw stroke, the container is ejected from the punch 73 and rests on the middle part of the magnetic conveyor belt 97. Belt 97 is tilted upwardly at angle "A" for the same purpose as the terminal portion of belt 82. Belt 97 rotates clockwise to convey the redrawn containers further into press 20 to a second redraw-profiling station. Thus, the intermediate magnetic transfer belt 97 aligns the first drawn container with a second redrawing station supported on the rear ram 49 below the ram 50. The cup holder for the second redraw-profiling section includes a curved abutment on each side associated with this section, which abutments allow the container to be redrawn in the second redrawing section and punched 9
9, but also so that the redrawn and profiled container can be moved by the vacuum finger 98 to the receiving station. That is,
After the second re-extraction station, the container has a smaller diameter and can be moved through the slot by the finger 98 to location 10C.

The redrawing punch forces almost the entire container through the drawing die in a second redrawing operation, thus leaving a flange on the redrawn container. Near the bottom dead center of its stroke, the bottom profiling tool is held upward in pressure contact with the bottom of the container by the action of the gas spring installed in the press, so that when the tool reaches the bottom dead center of its stroke, it The bottom is shaped into a dome. This doming operation brings the container to approximately its final shape.

As the punch 99 and its drawing sleeve 102 retreat upwardly, the re-drawn and bottom-scored container leaves the die 101 and is carried upwardly through the drawing die 101 until it lines up with the vacuum fingers 98. It will be done. finger piece 9
8 grips the sides of the container and pulls it from left to right while holding it in a vertically aligned position. This momentary finger 98 moves the container to the fining station 100 and the container is lined up for flange fining. More specifically, a die 106 is provided which is larger than the diameter of the container but equal to the diameter of the flange. A die-shaped 10-round flange is finned to the required dimensions for a sealed double seam flange. The punch assembly 104 pushes the finned container downward through the die 103 and drops the finned container onto the magnetic belt conveyor 1'05 below the die 103 so that the container can be easily removed from the press 20. make it possible to do so. Punch assembly 104 is mounted to the rear of ram 49 for movement therewith. Therefore, if a container is available,
One container is redrawn and profiled every 490 strokes of the rear ram while simultaneously finning the previously redrawn and profiled container.

A mechanism 106 for moving the vacuum fingers 98 is shown in FIG. This mechanism 106 reciprocates the vacuum finger 98 between a position where it holds the container and aligns it with the second redrawing and profiling station and a position where it aligns with the axis of the fining station. As the vacuum fingers 98 move towards their position as container holders relative to the second re-drawing and profiling section, the vacuum fingers must move upwardly to separate from the fin ring left on the fin die 103. The movement of the vacuum finger is not purely a reciprocating movement because it needs to move. Similarly, the vacuum fingers 98 are moved out of the path of the container flange as the container is pulled down while being redrawn prior to profiling, and the punch assembly 104 is used to perform fin removal. Vacuum fingers 98 must be timed to move.

The mechanism 106 includes a first vacuum finger that reciprocates.
107 and a second portion 108 for lifting the vacuum fingers 98 relative to the fin die mold 10. The first and second portions rotate relative to drive shaft 109 but are driven independently of each other. The first part 107 is an eccentrically mounted rotating link 11 whose movement
0 changes rotational motion to reciprocating motion. The second part 208 is rotated by the eccentric link 108a independently of the first part, but as far as their respective drive systems are concerned.

In FIG. 8, the worm 34a is shown supported by a pair of roller bearings 111. These bearings support a shaft 35 which is supported by the wall of the crank 6 and supports a worm 34a. Oil is supplied to the roller bearings from a main pump for the place through an upper oil passage 112 in a known manner. In order to balance the flow of oil, resistances are provided in the various feed header passages to appropriately control the flow of oil to various parts of the press. More specifically, passage 1
12 conveys oil to the bearing 111 through the wall of the upper crank chamber 66. 1 for draining oil from the bearing 111 for the purpose of draining oil from the bearing and controlling the amount of oil passing through it.
A pair of lower passages 116 are provided. These passages 113
is connected by an internal tube 114 to a suction pump (not shown).

In a preferred embodiment, 6.5 m/min at a pressure of 45 psi.
A model L75MEI: ATOR pump (not shown) capable of pumping 5 gal/p is used. This pump is of the sliding shoe type and includes an eccentric disc that fits tightly into a drainage chamber within the shoe so that eccentric movement of the disc causes the disc to move horizontally and the shoe to move vertically. The horizontal movement of the disk discharges the fluid in the discharge chamber, and the vertical movement of the shoe causes the shoe to reciprocate to control the flow of fluid into the pump and its subsequent discharge. In this case, synthetic gear oil is used to cool and lubricate the bearing 111 (FIG. 8). When the pump begins to operate, a hydraulic pressure differential is created that holds the shoe in contact with the orifices that control the suction and delivery of the pump. MEGATOR pumps are repetitively self-priming and can be operated without external priming, and the Type L75 MEGATOR pump has a volume slightly larger than the amount of oil needed to lubricate and cool the roller bearings. This pump pumps high viscosity fluids.

It is used for drying operations and pumping air, and has a high suction capacity. The amount of oil entering and exiting the heavily loaded worm gear roller bearing 111 is controlled to maintain the flow of cooling lubricant.

Various features have been illustrated and described in connection with large multi-/multi-acting and multi-flat, vertical presses. It will be obvious to those skilled in the art that changes can be made in materials, components, arrangement of components, order of action, method of action, design and structure without departing from the scope of the invention as set forth in the claims.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the upper part of a large inverted stacking press of the present invention;
Fig. 2 is a partial cross-sectional side view of the press in Fig. 1 seen from below at the center of the press with a part of the framework cut out; A schematic perspective view illustrating the transport push-and-feed method used, FIG. 4 similar to FIG. 2 except that the cup is shown in a redrawn state, FIG. 5 similar to FIGS. 6 and 4; Figure 6 shows how to remove a cup that has been re-pulled out before arranging the next cup for re-pulling. A side view of a portion of the press with one side of the press removed to enable inspection of the forming; Figure 7 is a large section with most details omitted showing how the various large assemblies of the press work together; FIG. 8 is a side cross-sectional view of the lower part of the press, which is mainly the upper and lower parts of the ground, with emphasis on the worm drive and the lower ram support and their functions; FIG. FIG. 10 is a cross-sectional partial view of the wedging system used to support the ram in a portion of the press of FIG. 1; FIG. Attached is a sectional view of the ram showing the action of the redrawing sleeve cushion cylinder and the punch arranged coaxially with it, and Figure 12 shows the transfer roller and L used to move the cup to the redrawing part of the press. 12... Press, 31... Crankshaft,
41.42...First and second parts. Patent Applicant: American, Power/・Kan・ξNee-10
: FIG, 6 FIG, 8 FIG, 9

Claims (1)

[Scope of Claims] (1) A large inverted stacking press having a first section for material forming and cup forming and a second section for drawing and redrawing, the press forming a thin sheet material. A press having a common crankshaft positioned below the material forming and cup forming station which first cuts into circular material and then draws it into shallow cups; A press characterized in that it comprises a drawing and redrawing station positioned above the blank forming and cup forming station for drawing and redrawing into an elongated container with an open end. (2) A large machine that performs many operations on thin sheets of material, including a common drive system that moves the working parts of the machine, where the machine cuts a portion of the sheet material and performs a first operation on the sheet portion. a first part including a set of tools connected to a drive train to reduce planar dimensions by increasing its height; a first part positioned alongside the first part and the drive train; a second station having associated tools for progressively working on the formed sheet from the first station, the work performed in the first station having approximately the same area as the work performed in the second station; A large machine requiring a drive system having approximately the same area as the first or second part. (3) The second part of the first part and the arrangement of the drive system are vertically stacked on top of each other, and the area is approximately the floor area required to support the machine.
Section of large machinery. (4) The large machine of claim 6, wherein the drive system is at the bottom, the first section is above the drive system, and the second section is above the first section. (5) A large machine according to claim 6, wherein the drive system has a travel relative to the first and second locations that produces an independent stroke at each location. (6) A large machine according to claim 4, wherein the first section is a material forming and cup forming section for cutting circular disks from sheets and forming the disks into shallow cups having a diameter smaller than the diameter of the disks. (8) A large machine according to claim 6, wherein the second part is a drawing and redrawing press adapted to rework the cup into an elongated, thin-walled container. Each part is made into a slender (
8. Large machine according to claim 7, comprising a plurality of lanes comprising a series of operations 7 for forming thin-walled containers. (9) A tool in the material forming and cup forming section located between the crankshaft and the drawing and redrawing section is used to form thin sheet metal into an elongated cup-shaped container with a thin wall using a large press driven by the crankshaft. A method in which the method forms a material forming and cup forming section, which is a part of a press that performs material forming and cup forming operations with a tool that moves in a relatively short stroke and forms the sheet into a cup, and forms a shallow cup. is transferred to the drawing and re-pulling section of the press, where the area required for the drawing and re-pulling operations is approximately equal to the area required for the material forming and cup forming operations, and the required process is required for the material forming and cup forming operations. A method of forming thin sheet metal into an elongated cup-shaped container, characterized by progressively drawing and redrawing the cup to a container of reduced diameter and increased height, such that the cup is longer than the stroke.