CN109746301A - For shaping the tool and correlation technique of shell - Google Patents

Abstract

Present disclose provides a kind of for shaping the tool and correlation technique of shell.Shell includes the center panel, circumferential clamping wall, the annular recess between the center panel and circumferential clamping wall and the curled portion to extend radially outwardly from clamping wall.The material of at least one predetermined portions of shell is partially selectively stretched relative at least one other of shell, thus provides corresponding lightening holes.The tool includes that pressure concentrates forming surface.

Description

For shaping the tool and correlation technique of shell

This divisional application is based on (the international application no PCT/ of Chinese invention patent application number 201680030515.3 US2016/026312), denomination of invention " container, the shell selectively shaped and tool and correlation technique for providing shell ", application Day is the divisional application of the patent application on April 7th, 2016.

Cross reference to related applications

This application claims the U.S. Patent applications of the Serial No. No.14/722,187 submitted on May 27th, 2015 Equity, the U.S. Patent application are incorporated herein by reference, which is in the sequence submitted on May 14th, 2013 It number is No.13/894, the part continuation application of 017 U.S. Patent application, this application requires to submit on May 18th, 2012 Entitled " container, the shell selectively shaped and tool and correlation technique (CONTAINER, AND for providing shell SELECTIVELY FORMED SHELL, AND TOOLING AND ASSOCIATED METHOD FOR PROVIDING SAME the equity of the U.S. Provisional Patent Application of Serial No. No.61/648,698) ".

Technical field

Disclosed design relates generally to container, and more particularly relates to canister (such as beer can or drink Batch can and food cans) can end or shell.Disclosed design is further related to for shaping can end or shell selectively to reduce The Method and kit for of quantity of material used in it.

Background technique

Canister (for example, tank) for accommodating product (such as food and beverage) is usually provided with the tank end easily opened Portion, in the can end, pulling-on piece (such as, but not limited to, riveting) is attached to burst bar or peelable plate.The peelable plate It is limited by the score line in the outer surface (such as public side) of can end.Tab pull structure is torn at being elevated and/or pulling to be drawn Trace line and bending and/or the peelable plate of removal, to form the opening of the content for distribution tank.

When manufacturing tank, the tank originates from can end shell, and the can end shell is by (such as but unlimited to metal plate product In aluminium sheet, steel plate) it carries out punching cutting (for example, punching) and is formed.Then, shell is transmitted to transistion pressure machine, the transformation pressure Power machine has multiple continuous tool stations.When shell proceeds to next tool station from a tool station, transformation is executed Until shell is completely converted into desired can end and is discharged from press machine, the transition operation is such as, but not limited to riveted for operation Forming, panelling, score line, coining, pulling-on piece is fixed and pulling-on piece riveting.

In tank manufacturing industry, in order to manufacture a considerable amount of tank, a large amount of metals are needed.Therefore, current industry target is Reduce the amount of metal of consumption.Therefore, constantly make efforts with reduce manufacture can end and tank ontology raw material thickness or Specification (sometimes referred to as " reduces specification ").But it due to using less material (such as relatively thin specification), needs The problem of developing unique solution.Therefore, industry wishes to reduce specification and to reduce the material for being used to form this container always Doses.However, to the material by opposite thin gauge formed can end it is relevant other the disadvantage is that for example during forming shell tank end Portion tends to wrinkle.

Existing motion for reducing metal usage amount reduces the blank size for being used for can end, but sacrifices end panel Area.This makes us undesirably limiting the available space for example for score line, peelable plate and/or pulling-on piece.

Therefore, it the can end or shell that are shaped in container (such as beer can/beverage can and food cans), selectively and is used for There is provided in the tool and method of this can end or shell that there are rooms for improvement.

Summary of the invention

These and other needs are met by disclosed design, the design is related to the shell selectively shaped, using choosing The container and tool and correlation technique for manufacturing the shell of the shell of selecting property forming.Among other advantages, shell is selected It stretches and is thinned to selecting property to reduce required amount of metal, while keeping desired intensity.

As the one aspect of disclosed design, shell structure is at fixed to container.Shell includes: the center panel；Circumferential clamping Wall (chuck wall)；Annular recess between the center panel and circumferential clamping wall；And radially outward from clamping wall The curled portion of extension.The material of at least one predetermined portions of shell is selectively drawn relative at least one other part of shell It stretches, thus corresponding lightening holes is provided.

Shell can be formed by material blank, and wherein material blank has base specification before formation, and wherein, in forming Afterwards, material of the shell at or near lightening holes has a thickness.Material thickness at or near lightening holes is less than basis Specification.Lightening holes may include clamping wall.

As the another aspect of disclosed design, provide a kind of for shaping the method for shell.This method comprises: by material Between introducing tool, being by material forming includes the center panel, circumferential clamping wall, between the center panel and circumferential clamping wall Annular recess and the curled portion that extends radially outwardly from clamping wall, by least one predetermined portions of shell relative to shell At least one other partially selectively stretch to provide the corresponding lightening holes of shell.

This method may include the step of shell to be transformed into finished product can end.This method may further include finished pot The step of end sealing is to vessel.

As the another aspect of disclosed design, the tool for shaping shell is provided.The tool includes: upper tool group Part；And lower tool component, the lower tool component are cooperated with upper tool component will be arranged in the lower tool Material forming between component and upper tool component be include the center panel, circumferential clamping wall, be located at the center panel and circumferential direction Annular recess between clamping wall and the curled portion to extend radially outwardly from clamping wall.Upper tool component and lower part work Has component cooperation partially selectively to draw the material of at least one predetermined portions of shell relative at least one other of shell It stretches, thus corresponding lightening holes is provided.

The predetermined portions of shell are partially selectively thinned relative at least one other of shell to provide the corresponding of shell Lightening holes have been identified as generating certain complexity, such as overload conditions on tool and/or press machine.In addition, choosing It is thinned to selecting property and may cause excessively non-uniform be thinned.Although that is, be thinned in it is some be unevenly that can receive , but excessively non-uniform be thinned is undesirable.It is thinned it is expected that completing selectivity using existing press machine.Therefore exist There is improved space in terms of tool.

These are met by disclosed design to need to be related to including that power and/or pressure are concentrated with other needs, the design It shapes surface and/or mixes the tool of bias formation component.In the exemplary embodiment, mixing bias formation component is following institute Active mixing one of the bias formation component or selectable mixing bias formation component stated.It should be understood that Know in technology, for pressure of the increasing action on shell, manufacturer simply increases the pressure on the tool of acting on.Pressure this Kind, which increases, produces the reaction load for being applied to press machine.As disclosed herein, power/pressure is concentrated on the forming surface Allow to reduce the reaction load for being applied to press machine.The increase of the pressure surface areas of the upper face of upper tool component with And the reduction for clamping the forming surface area of blank solves described problem.In the exemplary embodiment, forming surface is concentrated to permit The ratio of the total bias pressure of Xu and clamping pressure between about 1:10 between 1:50 or between about 1:20 between 1:40 or be about 1:30.That is, total bias pressure is applied to pressure surface, and the pressure generated at clamping surface between about 10 to It between 50 times or between about 20 to 40 times or is about 30 times.This ratio of total bias pressure and clamping pressure allows work Load state on tool and/or press machine reduces, and therefore solves described problem.In addition, using mixing bias generation group Part prevents excessive non-uniform Reducing thickness, and therefore solves described problem.

In the exemplary embodiment, the piston of upper tool component includes the piston for being connected to upper pressure sleeve.Piston Including the upper lateral part being exposed in pressure.Upper pressure sleeve includes lower part forming surface.The piston of upper tool component it is upper Side and the lower part of upper pressure sleeve forming surface area ratio between about 10:1 between 50:1, between about 20:1 extremely It between 40:1 or is about 30:1.Tool assembly with the area ratio solves the above problem.That is, such as Figure 12 A and Shown in Figure 12 B, in known technology, the upper lateral part of the piston of upper tool component and the lower part of upper pressure sleeve shape surface Area ratio be about 4:1.Compared with disclosed design, which includes the upper lateral part of the piston of lesser upper tool component Surface is shaped with the lower part of biggish upper pressure sleeve.It should be noted that in this construction, metal will not be subtracted as described above It is thin.As shown in figures 13 a and 13b, and in the exemplary embodiment, the upper lateral part of the piston of upper tool component and top are pressed The area ratio on the lower part forming surface of power sleeve is about 30:1.The upper tool component of construction with disclosed design is solution Certainly the power of described problem is concentrated and/or pressure concentrates forming surface.

Detailed description of the invention

When read in conjunction with the accompanying drawings, the middle complete reason obtained to disclosed design can be described below from preferred embodiment Solution, in the accompanying drawings:

Fig. 1 is the sectional view of the shell for beverage can end, also shows beverage can in simplified form with imaginary line A part；

Fig. 2 is the sectional view of the shell of Fig. 1, and it illustrates according to each of a non-limiting aspect of disclosed design Position is thinned；

Fig. 3 is the sectional view according to the tool of the embodiment of disclosed design；

Fig. 4 is the sectional view of a part of the tool of Fig. 3；

Fig. 5 is the sectional view of a part of the tool of Fig. 4, according to the non-limiting of the method for forming disclosed design Example is modified to show the tool in different location；

Fig. 6 A-6E is the progressive forming rank for being used to form shell according to the embodiment of the non-limiting example of disclosed design The side view of section；

Fig. 7 is the sectional view according to the tool of the alternate embodiments of disclosed design；

Fig. 8 is the detailed side section view for showing the pressure concentration forming surface on shell (ghost) the forming surface of the prior art Figure；

Fig. 9 is that there are three the close-up side elevations that the pressure of abutting part concentrates forming surface for tool；

Figure 10 is that there are five the close-up side elevations that the pressure of abutting part concentrates forming surface for tool；

Figure 11 is the flow chart of disclosed method；

Figure 12 A is the schematic diagram of power associated with the prior art, pressure and selected part region, wherein upper piston On pressure and material on lower part clamped surface pressure ratio be 1:4, Figure 12 B is can to reach showing for 1:4 pressure ratio There is the partial, partially-cross-sectioned side-elevation view of technical tool；With

Figure 13 A is the schematic diagram of power associated with disclosed design, pressure and selected part region, wherein upper piston On pressure and material on the ratio of lower part clamped surface pressure be 1:30, and Figure 13 B is the pressure that can reach 1:30 The partial, partially-cross-sectioned side-elevation view of tool shown in Fig. 3 of ratio.

Specific embodiment

It will be described as being applied in order to illustrate, the embodiment of disclosed design and be used for can end and (be generally called in this industry For the end " B64 ") shell, although it is readily apparent that they can be used for suitably, selectively stretch and be thinned in addition to Any known or suitable alternative type (such as, but not limited to, beverage can/beer can end, food cans except the end B64 End) and/or construction predetermined portions or region.

It should be understood that specific element shown in the accompanying drawings and describing in the following description is only herein The exemplary embodiment of disclosed design, the embodiment are provided as non-limiting example for being illustrated.Therefore, The specific size of used unit, orientation, component, quantity, embodiment construction and it is relevant to embodiment disclosed herein other Physical characteristic is not construed as limiting the range of disclosed design.

Directionality phrase used herein (such as clockwise, counterclockwise, left and right, top, bottom, upper and lower and its derivative) with The orientation of element shown in the drawings is related, and does not limit the scope of the claims, unless clearly stating herein.

As it is used herein, unless the context clearly indicates otherwise, otherwise singular "one", "an" and " described " includes plural form.

As it is used herein, the statement of two or more parts or component " connection " shall mean that these parts are straight It is grounded or links together or operate together (i.e. by one or more centre parts or component) indirectly, as long as depositing In link.As it is used herein, " directly connection " refers to that two elements are in direct contact with one another.It should be noted that moving Dynamic part (such as, but not limited to, breaker contact point) " directly joins when being in position (such as a second position for closure) Connect ", but when in the first position opened it is not " directly connection ".As it is used herein, " being fixedly connected " or " Gu Refer to calmly " and couple two components integrally to move, while keeping constant orientation relative to each other.Therefore, when connection two When element, all parts of these elements are coupled.However, the specific part of first element is connected to second element (for example, axis First end be connected to the first round) description refer to other parts of the specific part than the first element of first element It is arranged closer to second element.

" removedly couple " as it is used herein, phrase refer to a component with substantially temporary mode with it is another A component connection.That is, two components couple as follows: the connection or separation of component are easy to without damaging portion Part.For example, be " removedly coupling " using two components that the fastener of limited quantity easily touched is fixed to one another, and Weld together or two components of the connection of the fastener by being difficult to touch " do not couple removedly ".It " is difficult to touch And to fastener " refer to the fastener for needing first to remove one or more other components before touching the fastener, Wherein " other component " is not lane device (such as, but not limited to, door).

As it is used herein, " operatively coupling " refers to that multiple element or component are connected into so that working as first element from one When a position/construction is moved to another location/construction, second element is also moved between these position/constructions, the multiple member Each of part or component can move between the first position and the second position or between the first construction and the second constructions It is mobile.Notice first element can " operatively couple " to another element, and otherwise be not so.

As it is used herein, " coupling assembly " includes two or more connectors or connection parts.Connector or connection The component of connected components is not usually a part of identity element or other component.In this way, in the following description, when can be different Each component of " coupling assembly " is described.

As it is used herein, " connector " or " one or more connection parts " is one or more portions of coupling assembly Part.That is, coupling assembly includes at least two components for being configured to be linked together.It should be understood that the component of coupling assembly is each other It is compatible.For example, if a connection parts are snap sockets, another connection parts is exactly that buckle is inserted in coupling assembly Head, or if a connection parts are bolts, another connection parts is exactly nut.

As it is used herein, " correspondence " indicate two structure members size and shape be arranged to it is mutually similar and It can be coupled with the smallest amount of friction.Therefore, " correspond to " opening of a component to be dimensioned to make slightly larger than the component The opening can be passed through with the smallest amount of friction by obtaining the component.If both parts will " closely " be combined together, repair Change this definition.In this case, the difference between part dimension is even more small, and thus amount of friction increases.If limiting opening Element and/or be inserted into opening in component be made of deformable or compressible material, then opening can even than insertion open Component in mouthful is smaller.For surface, shape and line, two or more " corresponding " surface, shape or lines have substantially Identical size, shape and profile.

As it is used herein, and " corresponding to the first position and the second position of [y], [x] is in first position in phrase Moved between the second position " in, wherein " [x] " and " [y] " is element or component, term " corresponding to " indicates to work as element [x] When in first position, element [y] is in first position, and when element [x] is in the second position, and element [y] is in the Two positions.It is noted that " correspondence " is related to final position, and finger element must the mobile or same time shift with identical rate It is dynamic.That is, for example, hubcap and the wheel attached by it rotate in a corresponding manner.On the contrary, spring biased latch Component and latch release are mobile with different rates.Therefore, as described above, " correspondence " position is that finger element while being in is marked In the first position of knowledge and at the same time in the identified second position.

As it is used herein, the statement of two or more parts or component mutually " engagement " should finger element directly Or power or mutual bias are mutually exerted on by one or more intermediary elements or component.In addition, such as herein in regard to moving parts It is used, moving parts can during the movement from a position to another position " engagement " another element, and/or Moving parts can be once " engagement " another element once the described position.It is to be understood, therefore, that statement " works as member When part A is moved to the first position of element A, element A joint element B " and statement are " when element A is in the first position of element A When, element A joint element B " is equivalent statement, and is finger element A joint element when being moved to the first position of element A B and/or element A joint element B when being in the first position of element A.

As it is used herein, " being operatively engaged " refers to " engaging and mobile ".That is, working as and being configured to make Moveable or rotatable second component mobile first component when being used together, " being operatively engaged " refers to first Part applies sufficiently large power so that second component is mobile.For example, screwdriver can be arranged to contact with screw.When not to When screwdriver applied force, screwdriver is only " coupled " to screw.If applying axial force to screwdriver, screwdriver is pressed against On screw and " engagement " screw.However, when to screwdriver apply rotary force when, screwdriver " be operatively engaged " screw and So that screw rotates.

As it is used herein, word " one " refers to the component for being formed as single part or individual unit.That is, The component of part comprising independently forming and consequently as an element connection together is not the component or ontology of " one ".

As it is used herein, " being configured to [act] " refer to the structure of identified element or component be shaped as, ruler It is very little to be set as, be arranged as, coupling being, and/or being configured to execute identified movement.For example, the component of " being configured to move " can It is moveably coupled to another element, and the element including making the component mobile or component are otherwise configured to ring It should be mobile in other elements or component.Therefore, in addition, as it is used herein, " being configured to [act] " indicates structure and NOT function Energy.In addition, as it is used herein, " being configured to [act] " indicates that identified element or component are intended to and are designed to hold The identified movement of row.Therefore, be merely capable of executing identified movement but be not intended to and be not designed to execute identified it is dynamic The element of work is not " being configured to [act] ".As it is used herein, " association " be finger element be same component a part and/ Or it operates together, or work or mutually worked each other in some way.For example, there are four tires and four wheels for automobile tool Hub cap.Although all elements are all used as a part connection of automobile, but it is to be understood that each wheel hub cover and specific tire " association ".

As it is used herein, being moved between its first position and the second position in phrase " [x] " " or " [y] is configured to Move [x] between its first position and the second position " in, " [x] " is the name of element or component.In addition, when [x] be When the element or component that move between multiple positions, pronoun " its " is referred to " [x] ", i.e. element specified before pronoun " its " Or component.

As it is used herein, term " tank " and " container " are substantially interchangeably used, with refer to it is any of or Suitable container, the container are configured to accommodate substance (such as, but not limited to liquid, food, any other suitable object Matter), and clearly include but is not limited to beverage can (such as beer can and soda cans) and food cans.

As it is used herein, term " can end " refers to the lid or closure member that are configured to couple to tank with hermetically sealed can.

As it is used herein, term " can end shell " is substantially interchangeably used with term " can end "." can end Shell " or briefly " shell " are by disclosed instrumental purpose and to change into provide the component of desired can end.

As it is used herein, term " tool ", " tool assembly " and " apparatus component " are substantially interchangeably used, with Reference be used to form any of or suitable one of the shell of the design of (such as, but not limited to, stretch) according to the disclosure or Multiple apparatus or one or more components.

As it is used herein, " fastener " refers to any suitable connection or retention mechanism, clearly include but It is not limited to combination (such as, but not limited to locking nut) and bolt, washer and the nut of screw, bolt and screw bolt and nut Combination.

As it is used herein, integer (i.e. multiple) of the term " quantity " by indicating one or greater than one.

Figures 1 and 2 show that a can end shell 4, according to disclosed design non-limiting example embodiment Selectively shape.Specifically, as being described in detail herein below, the material in certain presumptive areas of shell 4 has been stretched To make it be thinned, and other regions of shell 4 preferably keep underlying metal thickness.Although the example being illustrated and described herein relates to And the shell for beverage can bodies 100 (being partly show in simplified form in Fig. 1 with imaginary line) (such as, but not limited to, is joined See the shell 4 of Fig. 1-3, Fig. 5 and Fig. 6 E), although it will be appreciated that, disclosed design can be used to stretch and be thinned for any The container (such as, but not limited to, food cans (not shown)) of known or suitable alternative type it is any of or suitable Can end shell type and/or construction, then further forming (such as transformation) is to use for the can end shell type and/or construction In the finished product can end of this container.

Shell 4 in the non-limiting example being illustrated and described herein includes circular central panel 6, the circular central panel 6 are connected to annular recess 10 by substantially columnar panel wall 8.Example annular recessed portion 10 has general U-shape Cross-sectional profiles.As shown in Figure 1, Figure 2 and shown in Fig. 6 E, recessed portion 10 is connected to bizet 14, and periphery by tapered clamping wall 12 Curled portion or outer lip 16 extend radially outwardly from bizet 14.

In the non-limiting example of Fig. 2, shell 4 has about 0.0082 inch of underlying metal thickness.The underlying metal is thick Degree preferably substantially remains in such as region of the center panel 6 and outer lip or curled portion 16.The center panel 6 is kept to be in base Plinth metal thickness facilitates in the end after transformation (being not explicitly shown) to have the function of riveting, score line and sets tab.Example Such as, but not limited to, by substantially maintaining the base thickness in panel 6, the metal phase that may be attributed to and be thinned is essentially eliminated The undesirable problem that the intensity of pass reduces, the undesirable problem all for example corrugation and/or undesirable score line and/or riveting Failure or tab failure.Similarly, outer lip 16 is maintained essentially at base thickness facilitates sealing ability, for that will cover Or the sealing of can end 4 (is partly show in Fig. 1 with imaginary line) in simplified form to tank ontology 100.With attached drawing mark in Fig. 2 Note 18 substantially indicates preferably to be minimal to the region that there is no being thinned.

It is therefore preferable that occur in clamping wall 12 it is most be thinned (such as, but not limited to, be thinned 5% to 20% or It is thinned about 10%).More specifically, it is preferable to which ground occurs to be thinned in the region between bizet 14 and recessed portion 10, in Fig. 2 substantially It is expressed as region 20.Therefore, as explanation, in the non-limiting example of Fig. 2, the thickness of the material in clamping wall 12 can subtract Small to about 0.0074 inch.It will be appreciated that this is a kind of significant reduction compared with traditional can end, result in aobvious The weight saving and cost savings of work.

It should furthermore be appreciated that specific shell type shown in Fig. 2 and/or construction and/or size (and mention herein All attached drawings supplied) range for being used only for being illustrated and being not intended to limit disclosed design is set.That is, for any Known or suitable shell or can end type and/or construction, can be in the other region of shell (such as, but not limited to shell 4) And/or any of or appropriate substitution of progress base specification is thinned in replacement area, without departing from disclosed design Range.

In addition, disclosed design realizes the thinned of material and the related reduction in terms of the total amount of material to weight, And increased without result in being supplied with forming the associated material processing charges of the raw material of final products.Such as it is but unlimited In processing (for example, rolling) to the increase for the base specification (that is, thickness) for reducing material that raw material carry out being capable of not the phase Ground is hoped to lead to the relatively large increase of initial cost of material.Disclosed design realizes desired thinned and reduces, and also uses With more conventional and the therefore base specification with lower expense raw material.

Fig. 3-Fig. 5 is shown according to a non-limiting example embodiment of disclosed design for stretching and being thinned shell Each tool assembly 200 (or " tool 200 ") of material.Specifically, pass through accurate tool geometries, arrangement and phase interaction For realizing selective forming (for example, stretch and be thinned).According to a non-limiting embodiment, which starts to have The component of the material blank (such as, but not limited to, referring to the blank 2 of Fig. 6 A) of underlying metal thickness or specification introducing tool assembly 200 Between.

Fig. 3 shows the single station 300 for being connected to the multistation tool assembly 200 of press machine 400, also referred to as " capsule Shape part (pocket) " 300.Such as, but not limited to, the conventional high rate coupled in the multistation tool assembly 200 with disclosed design During one action or the double acting each run for making mechanical press 400, a shell 4 is generated usually at each station 300.According to Disclosed design, tool assembly 200 include opposite upper tool component 202 and lower tool component 204, the upper tool Component 202 and the cooperation of lower tool component 204 (such as, but not limited to, are stretched with shaping；It is thinned；Bending) metal (such as but not Be limited to, referring to the metal base 2 of Fig. 6 A), thus realize desired shell (such as, but not limited to, referring to figures 1-3, Fig. 5 and Fig. 6 E Shell 4).

More specifically, upper tool component 202 and lower tool component 204 are connected to top die holder 206 and lower part die holder 208, the top die holder and lower part die holder are in a manner of commonly known respectively by the press and/or pad in press machine 400 Plate and stamping hammer support.Annular punching and drawing die 210 include upper flange portion 212, and the upper flange portion passes through Multiple fasteners 216 are connected to retainer or standpipe ontology 214.Punching and drawing die 210 surround upper pressure sleeve 218. That is, being punched with drawing die 210 close to upper pressure sleeve 218, and the diameter for being located at upper pressure sleeve 218 is outside Side.Inner mould component or mold center's part 220 are supported in upper pressure sleeve 218 by mold center's standpipe 222.Punching It cuts out and drawing die 210 includes internal bending forming surface 224 (Fig. 4 and Fig. 5).It wraps the lower end 227 of upper pressure sleeve 218 Include annular forming surface 226 (Fig. 4 and Fig. 5) of curved (contoured).

With continued reference to Fig. 3, ring mould retainer 230 is connected to lower part die holder 208, is located in recess 232.Annular cutting Edge mold 234 is connected to die holder 230 by suitable fastener 236.Under the low pressure sleeve 240 of annular includes Portion's piston portion 242, for being moved in die holder 230.Low pressure sleeve 240 further includes upper end 244, described Upper end 244 has the surface of substantially flat, the lower end on the surface of the substantially flat and above-mentioned punching and drawing die 210 Relatively.As shown, cut edge mold 234 is positioned adjacent to low pressure sleeve 240 and from low pressure sleeve 240 Upper end 244 is radially outward.As best viewed in Fig. 4 and Fig. 5, mold core ring 250 is arranged in low pressure sleeve 240, and And including upper end 252, the upper end 252 is opposite with the lower end of upper pressure sleeve 218 or forming surface 226.Upper end Portion 252 includes that tapered surface 254, round or curved inner surface 256 and rounded outer surface 258 (are all shown in figures 4 and 5 Out).Round panel formed punch 260 and above-mentioned mold center's part 220 are oppositely arranged in mold core ring 250.Panel formed punch 260 wraps Include the upper face 262 of the circular substantially flat with circumferential rounded surface 264.As best viewed in Fig. 4 and Fig. 5, periphery Concave portion 266 is extended downwardly from circular surface 264.

Correspondingly, the above-mentioned tool cooperation of upper tool component 202 and lower tool component 204 is to shape and specifically The scheduled selection area of stretching and thinned shell 4, as being more fully described referring now to Fig. 6 A- Fig. 6 E, it illustrates roots According to a non-limiting embodiment of disclosed design method for shaping the stretching and thinned shell 4 and it is relevant at The shape stage.

Fig. 6 A shows the first forming step, in the first forming step, uses 200 (Fig. 3 to figure of tool assembly above-mentioned 5) blank 2 is provided.More specifically, it is punched the corresponding cut edge with drawing die 210 and annular cutting edge mold 234 Cooperation cutting (such as punching) from the web of material or sheet material goes out blank 2.In the second step, as shown in Figure 6B, tool 200 Cooperation is to form the first bending, that is, as shown, the periphery edge of blank 2 is bent downwardly.Next, shown in Fig. 6 C In forming step, as shown, being further formed the exterior section of blank 2.This is realized by following cooperations: punching and drawing The inner curved surfaces 224 of mold 210 cooperate with the upper end 252 of mold core ring 250, and pass through upper pressure sleeve 218 Forming surface 226 cooperate with the upper end 252 of mold core ring 250.

4th forming step shown in reference Fig. 4 and Fig. 6 D is further described and is understood according to the upper of disclosed design It states the stretching of non-limiting embodiment and is thinned.Specifically, Fig. 4 shows the tool assembly 200 after downward stroke, wherein Shown all tools along 410 direction of arrow be moved down into shown in position.That is, punching and drawing die Tool 210 and low pressure sleeve 240 are moved down along 410 direction of arrow to be further formed outer lip or curled portion 16.As shown, upper pressure sleeve 218 has also been moved down along the direction of arrow 410, so that upper pressure sleeve 218 forming surface 226 cooperates with the upper end 252 of mold core ring 250 to be further formed bizet 14.With mold center's part Material is clamped the substantially flat of heart part 220 and panel formed punch 260 in a mold by the substantially flat surface of 220 lower end Upper face 262 between, also drawn in the region of clamping wall 12 along mold center's part 220 that 410 direction of arrow moves down Stretch the metal of blank 2.Mold center's part 220 and panel formed punch 260 are moved down along 410 direction of arrow, so as to when in mold When heart part 220 cooperates with the tapered surface 254 of mold core ring 250 in the region of clamping wall 12 stretch and thinned metal.Therefore, In the 4th forming step, the material of blank 2 will be stretched and be thinned in the region for becoming clamping wall 12, but in outer lip or In curled regions 16 or it is formed into the region of panel 6 (Fig. 5 and Fig. 6 E) later or is being formed into ring-shaped depression later (Fig. 5 and Fig. 6 E) hardly happens stretching or is thinned in the lower area in portion 10.As previously mentioned, these regions remain essentially in Base specification metal thickness.

In the 5th and last shell forming step, the forming of shell 4 is completed.Specifically, as shown in figure 5, Fig. 5 show with The relevant shown and as described above identical tool assembly 200 of the downward stroke of Fig. 4, in Fig. 5, some tool assemblies 200 have moved up along 420 direction of arrow to form the panel 6 of shell 4.Specifically, punching and drawing die 210, mold Central part 220, low pressure sleeve 240 and panel formed punch 260 are all moved up along 420 direction of arrow, and upper pressure sleeve 218 have stopped moving down along 410 direction of arrow at this time and have kept the pressure on shell 4.This causes in mold core ring 250 Outer lip or curled portion 16 are further formed in rounded outer surface 258, and on the forming surface 226 of upper pressure sleeve 218 Bizet 14 is formed between the upper end 252 of mold core ring 250.The desired final form of clamping wall 12 passes through upper pressure set Cylinder 218 is provided with the interaction on the surface 254 and 256 of mold core ring 250.Panel 6 is by the substantially flat of panel formed punch 260 Smooth upper face 262 and mold center's part 220 interacts and is formed, this is because gold of the both parts all with blank 2 Belong to the direction together along arrow 420 to move up, the metal of blank 2 becomes arrangement (for example, clamping) in upper face 262 and mould Has the panel 6 between central part 220.This movement also contributes to forming cylinder shape panel wall 8 and recessed portion 10.

Specifically, when panel formed punch 260 moves up and upper pressure sleeve 218 moves down, annular recess 10 are formed in the periphery depressed section 266 of panel formed punch 260.Therefore, when the circumferential rounded surface of metal and panel formed punch 260 When 264 cooperation, cylinder-shaped panel wall 8 is formed.

Accordingly it should be appreciated that disclosed design is dramatically different with traditional shell manufacturing process and tool, traditional In shell manufacturing process and tool, the material of blank 2 or shell 4 is not especially stretched or is thinned.Although that is, exemplary shell 4 (Fig. 1-Fig. 3, Fig. 5 and Fig. 6 E) nominally panel 6, recessed portion 10 and outer lip or crimping portion 16 be not stretched or not by Stretch, but the region 20 (Fig. 2) between recessed portion 10 and bizet 14 during forming process (especially shown in Fig. 5 and Fig. 6 D The 4th forming step in) be stretched and be thinned.

It will be appreciated that although showing five shaping stages in Fig. 6 A to Fig. 6 E, according to disclosed design, The shaping stage that any of or suitable substitution quantity and/or alternate orders can be executed, with properly selecting property draws Stretch and be thinned material.It is further appreciated that can be used for using any of or suitable mechanism, the mechanism in material The some regions of material are fixed while other presumptive areas of material are stretched and are thinned, fully to resist the movement of material (such as sliding) or flowing are thinned, without departing from the range of disclosed design.In addition, in addition to the shell being illustrated and described herein Except 4 region, the replacement area of shell 4 (such as, but not limited to shell 4) or other region can be properly tensioned and be thinned, and And disclosed design can be completely applied to the shell (not shown) with different type and/or construction.

Accordingly it should be appreciated that disclosed design is provided for selectivity stretching and thinned shell 4 (Fig. 1-Fig. 3, Fig. 5 With the tool assembly 200 (Fig. 3-Fig. 5) and method of the presumptive area (such as, but not limited to, region 20 referring to fig. 2) of Fig. 6 E), Thus provide relatively large material saving and cost savings.

Another embodiment of disclosed invention is shown in FIG. 7.Other than element discussed below, tool 200A It is substantially similar to tool assembly 200 discussed above, and identical element will use identical appended drawing reference.Institute as above It states, and in the exemplary embodiment, the upper end 252 of mold core ring and the lower end of upper pressure sleeve 218 or forming table Face 226 is opposite.As further described above, the exterior section of blank 2 is by the forming surface 226 of upper pressure sleeve 218 and mould The upper end 252 for having core ring 250, which cooperates, to be formed.That is, the forming of the upper end 252 of mold core ring and upper pressure sleeve Surface 226 all engages blank 2.It referred to as " is clamped " as it is used herein, the element being arranged opposite to each other simultaneously engages.

As described above, the upper end 252 of mold core ring includes tapered surface 254, rounded internal surface 256 and rounded outer surface 258.In the exemplary embodiment, the upper end 252 of mold core ring further includes general horizontal surface 257.As it is used herein, " general horizontal surface " 257 is the upper end of mold core ring generally perpendicular to upper tool component 202 and lower tool group The part extended in the plane of the axis of movement of part 204.As it is used herein, " generally vertically " referring to +/- about 10 degree vertical.

In this exemplary embodiment, upper tool component 202 and lower tool component 204 are in the first position separated It is moved between shaping position, at the first position separated, upper tool component 202 and lower tool component 204 Be spaced apart, at the shaping position, upper tool component 202 close to lower tool component 204 with selectively by shell 4 extremely The material of few predetermined portions is stretched relative at least one other part of shell, thus provides corresponding lightening holes.When When upper tool component 202 and lower tool component 204 are in shaping position, as described above, upper pressure sleeve 218 and mold Core ring 250 clamps shell 4.As it is used herein, the power acted on blank 2 is " clamping force ".

In this exemplary embodiment, upper tool component 202 further includes mixing bias formation component 500, and top The forming surface 226 of pressure house is that power concentrates forming surface 600.As it is used herein, " mixing bias formation component " is The component of bias is generated in a manner of at least two different, and bias is applied to the same part.That is, such as this paper institute It uses, " mixing bias formation component " includes that will be biased at least two bias formation components for being applied to the same part and more A mixed component.Therefore, component is such as, but not limited to as described herein via compression fluid (pressure bias) and via spring (machine Tool bias) generate bias mixing bias formation component 500, the component meet as active mix bias formation component First requirement.On the contrary, the device with high pressure compressor and low pressure compressor (all generation pressure bias) is not a kind of " mixing Bias formation component ", because the mode for generating bias is identical.In addition, the bias of one of type is applied to one The component that component and another type of bias are applied to different components is also not " mixing bias formation component ", because of bias It is not applied to the same part.

In addition, as it is used herein, " active mixes bias formation component " is to include while applying to the same part The component of at least two bias formation components of bias.In addition, as it is used herein, " selectable mixing bias generation group Part " be include the component of at least two bias formation components, and bias is selectively applied to the same part.Namely Say that in " selectable mixing bias formation component ", there is the ability being biased in a manner of at least two different, and And user determines which bias formation component is biased or both to component and is biased to component.Therefore, when When user selects two kinds of modes being biased, " active mixes bias for " selectable mixing bias formation component " conduct Formation component " is operated.In other words, " active mixes bias formation component " is a kind of " selectable mixing bias life At component ", but opposite situation is not always such.That is, and not all " selectable mixing bias formation component " be all " active mixes bias formation component "." the selectable mixing bias generation being only biased with one of several available means Component " is " selectable mixing bias formation component " rather than " active mixes bias formation component ".In exemplary implementation In example, mixing bias formation component 500 is active mixing bias formation component 502 or selectable mixing bias formation component One of 504.

Mixing bias formation component 500 includes pressing creation component 510, mechanical bias component 550 and multiple mixed components 570.As it is used herein, " mixed component " 570 is configured for the component used by two bias formation components, in example Property embodiment in, described two bias formation components be pressing creation component 510 and mechanical bias component 550.Pressing creation group Part 510 includes pressure generation device 512 (schematically showing), pressure communication component 514 (schematically showing), pressure chamber 516 With piston component 518.Pressure generation device 512 is any of to be configured in the case where increasing pressure compression fluid or storage The device of the fluid of compression, described device are such as, but not limited to fluid pump or compressor.Pressure communication component 514 includes any number Hose, conduit, channel or any other structure that pressurized fluid can be connected to of amount.It should be understood that pressure communication component 514 further include sealing element, valve or need to control pressurized fluid connection any other structure.

In the exemplary embodiment, standpipe ontology 214 hermetically couples, directly couples or be fixed to top die holder 206.? In the construction, standpipe ontology 214 defines pressure chamber 516.It should be understood that pressure chamber 516 includes preventing fluid from escaping Required unshowned multiple sealing elements.As described below, piston component 518 includes circular ring shape ontology 520, and in exemplary reality Applying includes spring base 554 in example.In another unshowned embodiment, piston only and spring base are integral type ontologies.It answers Understand, the description of the piston only 520 suitable for spring base 554 is the embodiment for including spring base 554.For example, piston Ontology 520 corresponds to pressure chamber 516 and mold center's standpipe 222；It should be understood that in the embodiment with spring base 554 In, spring base 554 corresponds to pressure chamber 516 and mold center's standpipe 222.Therefore, the exterior radial surface of piston only 520 Or spring base 554 is sealingly coupled to the inner surface of pressure chamber 516, and the inner radial surface sealing of piston only 520 Ground is connected to the outer surface of mold center's standpipe 222.It should be understood that piston component 518 includes preventing fluid from pressure chamber Unshowned multiple sealing elements needed for 516 evolutions.Piston component 518 is movably disposed in pressure chamber 516.

Pressure generation device 512 is in fluid communication via pressure communication component 514 and pressure chamber 516.Fluid and therefore Pressure associated therewith is communicated to the upper lateral part (hereinafter referred to as " pressure surface " 521) of piston only 520.It should be understood that , in the embodiment with spring base 554, pressure surface 521 can be the upper face of spring base 554.Exemplary In embodiment, total biasing force is applied to pressure surface 521, and the area of pressure surface 521 is in about 3.46in²(square inch) arrives 17.3in²Between or be about 10.38in².Therefore, pressure generation device 512 is configured to control piston component 518 in pressure chamber Position in room 516, and it is configured so that piston component 518 moves in pressure chamber 516.Piston component 518 is connected to Upper pressure sleeve 218.That is, upper pressure sleeve 218 includes the upper end 225 opposite with forming surface 226.Piston Component 518 is connected to the upper end 225 of upper pressure sleeve.Therefore, when piston component 518 moves in pressure chamber 516, Upper pressure sleeve 218 moves between the first position of extension and the second position of retraction, at the first position, top The lower end 227 of pressure house is more spaced apart with top die holder 206, in the second place, upper pressure sleeve Lower end 227 is smaller spaced apart with top die holder 206.

In this construction, piston component 518 and piston only 520 are " mixed components " 570 as herein defined.Also It is to say, piston component 518 and piston only 520 are configured to by both pressing creation component 510 and mechanical bias component 550 all benefits With.Notice that only associated with pressing creation component 510 or only piston associated with mechanical bias component 550 is not as herein Defined " mixed component ".That is, according to this definition, only piston component 518 associated with pressing creation component 510 It " cannot be configured to " be used by two bias formation components.Similarly, only related to mechanical bias component 550 according to this definition The piston component 518 of connection " cannot be configured to " be used by two bias formation components.Therefore, only with 510 phase of pressing creation component Associated piston or only piston associated with mechanical bias component 550 are not as used herein " mixed components ".

In the exemplary embodiment, mechanical bias component 550 includes multiple spring assemblies 552 and multiple spring bases 554.Bullet Spring component 552 includes multiple springs 560 associated with each spring base 554.In one embodiment, each spring assembly 552 include single Hookean spring rigidity compressed spring 560.In this embodiment, mechanical bias component 550 is configured to and really It is biased during the compression of spring assembly 552 with the rigidity of generally linear.

In another exemplary embodiment, each spring assembly 552 includes multiple springs with variable spring rate 560.(it should be understood that appended drawing reference 560 indicates " spring " rather than certain types of spring).Variable spring rate can be Incremental spring rate, the spring rate successively decreased or double rigidity (sometimes referred to as " are incremented by (progressive with inflection point Any one of with knee) ") spring rate.As it is used herein, " incremental spring rate " is in a non-linear manner Compressively increased spring rate.As it is used herein, " spring rate successively decreased " is compressively to reduce in a non-linear manner Spring rate.As it is used herein, " double rigidity " spring rate is following spring rate: the spring rate is with First Line Property or the spring rate of generally linear increase, until reaching selected compression, hereafter spring rate with different second it is linear or The spring rate of generally linear increases.That is, the first spring rate and second spring rigidity differ considerably from one another.It is variable rigid The spring of degree includes but is not limited to the cylindrical springs with variable pitch, volute spring and small sized pieces spring.

In one exemplary embodiment, all spring assemblies 552 include the spring 560 of substantially the same type.Also It is to say, for example, the compressed spring 560 of each spring assembly 552 including multiple substantially similar Hookean spring rigidity or multiple The compressed spring 560 of substantially similar double rigidity.In another exemplary embodiment, spring assembly 552 includes different type Spring.For example, one group of spring assembly 552 includes multiple substantially similar Hookean spring rigidity in mechanical bias component 550 Compressed spring 560, and second group include multiple substantially similar double rigidity compressed spring 560.In another example In property embodiment, the spring assembly 552 of stiffness variable may include multiple double rigid springs, multiple bullets with different compression ratios Any one of spring, multiple springs with incremental spring rate, multiple springs with spring rate of successively decreasing or these bullets The combination of any one of spring.

In the exemplary embodiment, compressed spring 560 is arranged in pressure chamber 516.In this embodiment, at least lower part Spring base 554' corresponds to the circular ring shape ontology 562 of pressure chamber 516 and mold center's standpipe 222.Lower springs seat 554' Connection, the directly upper lateral part of connection, the upper lateral part fixed to piston only 520 or lower springs seat and piston only 520 are one Body.Compressed spring 560 is dimensioned to when being arranged in pressure chamber 516 in compressive state.In this configuration, machine 550 bias of tool bias assembly (operatively engages) piston component 518, and therefore bias upper pressure sleeve 218.Namely It says, upper pressure sleeve 218 is biased into its first position.

In one exemplary embodiment, wherein pressure concentrates forming surface 600 to have about 0.346in as described below²'s Area, total bias pressure are the power between about 7000lbfs and 9000lbfs acted on pressure surface 521 or about The power of 8000lbfs, the area of the pressure surface 521 is between about 3.46in²To 17.3in²Between, between about 6.92in²Extremely 13.84in²Between or be about 10.38in².It alternatively, is about 10.38in in the area of the pressure surface 521²Implementation In example, pressure concentrates the area on forming surface 600 as described below between about 1.038in²To 0.208in²Between, between about 0.519in²To 0.2595in²Between or be about 0.346in².That is, power/pressure between about 1:10 between 1:50 Ratio or ratio or about 1:30 between about 1:20 to 1.40 proportion set in.

In the exemplary embodiment, as described above, multistation tool assembly 200 is connected to press machine 400, i.e., 100 tons Press machine.Multistation tool assembly 200 includes 24 stations or bladder 300.Each pressure is acted in about 8000lbfs In the embodiment (acted on 24 pressure surfaces 521) on power surface 521, total load is about 8000lbfs*24 (capsule Shape part)=192000lbfs.About 192000lbfs is about 96 tons (192000lbfs/2000).Therefore, in construction described herein Have described in the upper tool component 202 of mixing bias formation component 500 solves and be used together with existing press machine Problem, and the power including being configured to operate together with existing 100 tons of press machines concentrates forming surface 600.

" total bias pressure " can also be expressed as by total bias/power that mixing bias formation component 500 generates.Such as this paper institute It uses, " total bias pressure " refers to by mixing bias formation component 500 (and therefore by upper tool component 202) generation Total bias/pressure.In addition, mechanical bias component 550 generates to be considered being evenly distributed in pressure surface as used herein Power on 521.That is, mechanical force can be considered as the pressure for calculating the power and pressure that act on component.Showing In example property embodiment, mechanical bias component 550 generates the about 70%-80% or about 75% of total bias pressure.On the contrary, pressure is raw The about 20%-30% or about 25% of total bias pressure is generated at component 510.Power/the pressure generated by pressure generation device 512 It acts on pressure surface 521.It is about 10.38in in the area of pressure surface 521²Exemplary embodiment in, mix bias Formation component 500 generates the pressure of the pressure or about 770.7psi between about 674.4psi and about 867.1psi.In addition, About the 75% of total bias pressure is generated in mechanical bias component 550 and pressing creation component 510 generates the pact of total bias pressure In 25% exemplary embodiment, mechanical bias component 550 generate between about 505.8psi between 650.3psi pressure or The pressure of about 578.0psi, and pressing creation component 510 is generated between about 168.6psi to the pressure between about 216.8psi Or the pressure of about 192.7psi.In addition, pressing creation component 510 is configured to add pressure chamber 516 with the pressure of somewhat constant Pressure.

In alternative exemplary embodiment, mixing bias formation component 500 is configured with by mechanical bias component The 550 essentially all total bias pressures or all total bias pressures generated, and pressing creation component 510 generates somewhat constant But substantially the smallest pressure.That is, in this embodiment, mechanical bias component 550 generates the pact of total bias pressure 90%-99% or about 95%.On the contrary, pressing creation component 510 generates about the 1% to about 10% or about 5% of total bias pressure. In addition, pressing creation component 510 is configured to pressurize to pressure chamber 516 with the pressure of somewhat constant.In this embodiment, it mixes Bias formation component 500 is active mixing bias formation component 502.

In addition, in this embodiment, mixing bias formation component 500 is configured to change by mechanical bias component 550 and pressure The ratio for the power that power formation component 510 generates.That is, for example, total bias pressure is substantially during initial clamp operation It being generated by mechanical bias component 550, i.e., mechanical bias component 550 generates about the 90% to 100% or about 99% of total bias pressure, And pressing creation component 510 generates about the 0% to 10% or about 5% of total bias pressure.After initial clamp operation, that is, exist During second clamp operation, it is reduced to by total bias pressure that mechanical bias component 550 generates more than or equal to total bias pressure 75%, and pressing creation component 510 generate be up to total bias pressure 25%.

In alternative embodiments, mixing bias formation component 500 is selectable mixing bias formation component 504, Middle user selects to generate the source of pressure, i.e. selection mechanical bias component 550 or pressing creation component 510.In this embodiment, Mechanical bias component 550 generates about 99% to 100% or substantially all total bias pressure of total bias pressure.On the contrary, pressure Formation component 510 generates about 0% to 1% or insignificant percentage of total bias pressure.That is, for example, in Xiang Shanghang During journey, pressing creation component 510 generates the insignificant percentage of total bias pressure, while generating enough pressure with downward The element of bias upper tool component 202.As previously mentioned, in the exemplary embodiment, pressing creation component 510 is configured to big Constant pressure pressurizes to pressure chamber 516 on body.

In another embodiment, mixing bias formation component 500 is also selectable mixing bias formation component 504, Middle user selects to generate the source of pressure, i.e. selection mechanical bias component 550 or pressing creation component 510.However, in the implementation In example, pressing creation component 510 generates the total bias pressure of about 99%-100% or substantially all of total bias pressure.On the contrary, Mechanical bias component 550 generates about 0% to 1% or insignificant percentage of total bias pressure.That is, in upward stroke Period, such as mechanical bias component 550 generate the insignificant percentage of total bias pressure, at the same generate enough pressure with to The element of lower bias upper tool component 202.As previously mentioned, in the exemplary embodiment, pressing creation component 510 be configured to The pressure of somewhat constant pressurizes to pressure chamber 516.

In this embodiment, pressing creation component 510 is configured to apply variable pressure.That is, pressing creation group Part 510 includes pressure control assembly 530 (schematically showing), and the pressure control assembly is configured to change in pressure chamber 516 Pressure.In exemplary embodiment, pressure control assembly 530 includes that multiple pressure sensors in pressure chamber 516 (do not show Out) and it is configured to determine the position sensor (not shown) of the position of piston component 518.Pressure control assembly 530 is configured to Change the pressure in pressure chamber 516 according to pressure curve.That is, pressure control assembly 530 is configured to according to piston group The position of part 518 increaseds or decreases the pressure in pressure chamber 516.In the exemplary embodiment, pressure control assembly 530 wraps Include programmable logic circuit (PLC) (not shown) and multiple electrical pressure regulators.Sensor and electrical pressure regulator connection To PLC and with its electronic communication.PLC further includes the number of the instruction and expression pressure curve for operating electrical pressure regulator According to.

In the exemplary embodiment, mixing bias formation component 500 is configured to be had by means of removable spring 552 Switch between source formula mixing bias formation component 502 or selectable mixing bias formation component 504, or can be mixed in active It closes and switches between the different configuration of any one of bias formation component 502 or selectable mixing bias formation component 504.? That is spring 552 is removably coupled to the spring base 554 in pressure chamber 516.

It is noted that in another embodiment, upper tool component 202 does not include mixing bias formation component 500, and Being includes one of mechanical bias component 550 or pressing creation component 510, wherein selected component provides total bias pressure 100%.As described below, mechanical bias component 550 or pressing creation component 510 are connected to " pressure concentrates forming surface " 600. That is, mechanical bias component 550 or pressing creation component 510 are connected to other elements as described herein.

As described above, the forming surface 226 of upper pressure sleeve is that pressure concentrates forming surface 600.As used herein , " pressure concentrates forming surface " 600 is the forming table in the reduction region of forming surface engagement blank 2 compared with the existing technology Face.That is, blank 2 is clamped table in the circle for the upper end 252 for being arranged in mold core ring by the forming surface of the prior art Face 256, generally horizontal surface 257 and in some constructions in rounded outer surface 258.As it is used herein, " pressure collection Middle forming surface " 600 is the forming surface engaged with the finite part on the surface of the upper end 252 of mold core ring, or with Be arranged in pressure concentrate forming surface 600 and the upper end 252 of mold core ring between bizet 14 finite part engagement at Shape surface.That is, the surface for " not clamping " blank can not be a part of " pressure concentrates forming surface " 600.In base In a generally circular exemplary embodiment of part, finite region is clamping region that is radially continuous, annular, reducing. As it is used herein, " reduced clamping region " is at one of the general horizontal surface 257 of the upper end of mold core ring 252 Divide the upper radially continuous annular region for extending but not extending in the rounded internal surface 256 of the upper end of mold core ring 252.This Outside, as it is used herein, " (diminished) clamping region of decrease " is the substantially water in the upper end of mold core ring 252 Extend on about 25% to 75% region of flat surface 257 but not in the rounded internal surface 256 of the upper end of mold core ring 252 The radially continuous annular region extended.That is, in the prior art, forming surface is and is upper with mold core ring The whole surface (i.e. 100%) of the engagement of end 252 and the substantitally planar as clamping region, and the power of the disclosure concentrates forming Surface 600 includes reduced clamping region.

In Fig. 9 and another exemplary embodiment shown in Fig. 10, it includes multiple " support that pressure, which concentrates forming surface 600, Socket part " 610.As it is used herein, " abutting part " is the finite region on the forming surface 226 of upper pressure sleeve.In example Property embodiment in, it includes essentially concentric between two to five that pressure, which concentrates multiple abutting parts 610 on forming surface, Abutting part 610A, 610B, 610C, 610D, 610E.That is, in the exemplary embodiment, under upper pressure sleeve 218 End includes the forming surface 226 of annular (i.e. substantial circular).Multiple abutting parts 610 are the annular forming surfaces for clamping blank 2 226 dwell of cam.That is, only abutting part 610 is engaged with blank 2.Region between abutting part 610 is relative to abutting part 610 upwardly bias so that these regions do not engage blank 2.In other words, in the exemplary embodiment, between abutting part 610 There are locked grooves 612.

As shown in fig. 7, the cross-sectional area on the forming surface 226 of upper pressure sleeve much smaller than piston component 518 and/or The cross-sectional area of lower springs seat 554'.In this configuration, blank 2 is applied to by the forming surface 226 of upper pressure sleeve Pressure/area be greater than and act on pressure/area on piston component 518 and/or lower springs seat 554'.That is, When bias/power is kept constant, compared with the area at the forming surface 226 of upper pressure sleeve, in piston component 518 and/or The area that bias/power is acted at lower springs seat 554' is bigger.Therefore, at the forming surface 226 of upper pressure sleeve Area more hour, the pressure of per unit area are bigger.

For pressure concentrates forming surface 600, the pressure increase of per unit area is bigger.That is, as herein Defined by pressure concentrate forming surface 600 area be even less than upper pressure sleeve forming surface 226 area.Make With pressure concentrate forming surface 600 exemplary embodiment in, the ratio of total bias pressure and clamping pressure between about 1:10 extremely To between 1:40 or be about 1:30 between 1:50 or between about 1:20.

In this configuration, in the exemplary embodiment, clamping pressure is approximately located i at the elastic limit of deformable material.This Outside, in the exemplary embodiment, deformable material has " the thinned limit ".That is, as it is used herein, " the thinned limit " It is the elastic limit in material when in a compressed state.That is, the material in compressive state can be placed in more than material Elastic limit but not tear material tension under.Therefore, as it is used herein, " the thinned limit " is that material is allowed to be thinned About 10% without tearing pressure.Above example measurement result (such as area of pressure surface 521) is for processing It is initially the tool assembly 200 of the aluminium of about 0.0082 inch.Pressure concentrates forming surface 600 to be configured to generation and is approximately located i aluminium The thinned limit at clamping pressure and make aluminium be thinned so that the thickness of the material in clamping wall 12 can reduce about 0.0074 inch of thickness.

It therefore, as shown in figure 11, the use of above-mentioned tool assembly 200A include: that 1000- incorporates a material into tool assembly 200A Between；1002- generates total biasing force in tool assembly 200A；Material is clamped in upper tool component 202 and lower part by 1004- Between tool assembly 204；1006- be by material forming include the center panel, circumferential clamping wall, in the center panel and circumferential clamping Annular recess between wall and the curled portion to extend radially outwardly from clamping wall；1008- is by least one reservations of shell Component selections relative to shell at least one other part stretch to provide the corresponding lightening holes of shell.

It should be noted that the method and component disclosed herein for shell to be thinned can also be used for attenuated tank ontology, can end And/or the metal thickness on dome and cup (being used for the previous structure of tank ontology).

Although the specific embodiment of disclosed design is described in detail, it will be appreciated by persons skilled in the art that According to the general teachings of the disclosure, the various modifications and substitution to these details can be developed.Therefore, disclosed specific cloth Set the range being intended only to illustrate without limiting disclosed design, the range of disclosed design will be endowed appended claims and its The full scope of any and all equivalent programs.

Claims (10)

1. one kind includes: for shaping the tool (200A) of shell (4), the tool

Upper tool component (202), the upper tool component include upper pressure sleeve (218)；

The upper pressure sleeve (218) includes the lower end (227) for limiting pressure and concentrating forming surface (600)；

Lower tool component (204), the lower tool component cooperate with the upper tool component (202) so as to be arranged in down Material forming between portion's tool assembly and upper tool component be include that the center panel (6), circumferential clamping wall (12), annular are recessed Concave portion (10) and curled portion (16), the annular recess be located at described the center panel (6) and the circumferential clamping wall (12) it Between, the curled portion extends radially outwardly from the clamping wall (12)；And

Wherein, the upper tool component (202) and the lower tool component (204) are in the first position and forming separated It is moved between position, at the first position separated, the upper tool component (202) and the lower tool component (204) be spaced apart, at the shaping position, the upper tool component (202) close to the lower tool component (204), With at least one other portion selectively by the material of at least one predetermined portions of the shell (4) relative to the shell (4) Divide and stretch, to provide corresponding lightening holes.

2. tool (200A) according to claim 1, wherein it includes reducing that the pressure, which concentrates forming surface (600), Clamping region.

3. tool (200A) according to claim 2, wherein it includes weakening that the pressure, which concentrates forming surface (600), Clamping region.

4. tool (200A) according to claim 2, wherein it includes multiple support that the pressure, which concentrates forming surface (600), Socket part (610).

5. tool (200A) according to claim 4, wherein the pressure concentrates the multiple abutting part on forming surface (610) include essentially concentric between two to five abutting part (610A-610E).

6. tool (200A) according to claim 2, in which:

The lower tool component (204) includes mold core ring (250)；

The mold core ring (250) includes upper end (252), the upper end (252) and the top of the mold core ring The lower end (227) of pressure house is relatively arranged；

The upper end (252) of the mold core ring includes internal tapered surface (254), rounded internal surface (256), substantially water Flat surface (257) and rounded outer surface (258)；And

Wherein, when the upper tool component (202) and the lower tool component (204) are in shaping position, the pressure It is only opposite with the general horizontal surface (257) of the mold core ring that power concentrates forming surface (600) to be arranged to.

7. tool (200A) according to claim 1, in which:

When the upper tool component (202) and the lower tool component (204) are in the first position separated and institute It states when being moved between shaping position, the upper tool component (202) generates total biasing force；

Total biasing force is transmitted to the pressure by the upper pressure sleeve (218) and concentrates forming surface (600)；

The pressure concentrates forming surface (600) to be configured to apply clamping force to workpiece；And

Total biasing force and the ratio of the clamping force are between 20:1 and 40:1.

8. tool (200A) according to claim 7, wherein total biasing force and the ratio of the clamping force are 30:1.

9. a kind of method for shaping shell (4), which comprises

It incorporates a material between (1000) tool (200A)；

(1002) total biasing force is generated in the tool (200A)；

Material is clamped into (1004) between upper tool component (202) and lower tool component (204), wherein total bias The ratio of power and clamping force is between about between 20:1 and 40:1；

Being by the material forming (1006) includes the center panel (6), circumferential clamping wall (12), annular recess (10) and curling Portion (16), the annular recess are located between described the center panel (6) and the circumferential clamping wall (12), the curled portion from The clamping wall (12) extends radially outwardly；And

At least one predetermined portions of the shell (4) are partially selectively drawn relative at least one other of the shell (4) (1008) are stretched, to provide the corresponding lightening holes of shell (4).

10. according to the method described in claim 9, wherein, the material is clamped in the upper tool component (202) and institute State between lower tool component (204) includes so that total biasing force and the ratio of the clamping force are 30:1.