CN101342559A - Hot forming apparatus and hot forming method - Google Patents
Hot forming apparatus and hot forming method Download PDFInfo
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- CN101342559A CN101342559A CNA2008100977406A CN200810097740A CN101342559A CN 101342559 A CN101342559 A CN 101342559A CN A2008100977406 A CNA2008100977406 A CN A2008100977406A CN 200810097740 A CN200810097740 A CN 200810097740A CN 101342559 A CN101342559 A CN 101342559A
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- cooling
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- counterdie
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/025—Stamping using rigid devices or tools for tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/02—Bending by stretching or pulling over a die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/34—Heating or cooling presses or parts thereof
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
- C21D1/673—Quenching devices for die quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
Abstract
Disclosed herein is a hot forming method and apparatus that can improve strength of a product via die operation. The hot forming apparatus includes a lower die on which a workpiece is placed, an upper die coupled to the lower die to press the workpiece, a holder disposed between the upper and lower dies to form an inner space of the workpiece, and a cooling unit to cool the workpiece. The hot forming method includes coupling an upper die, a lower die and a holder with a workpiece placed on the lower die, followed by pressing the workpiece to perform a hot forming operation, determining whether or not a preset time has elapsed after pressing the workpiece, and cooling the workpiece by supplying a cooling fluid around the workpiece, if the preset time has elapsed.
Description
Technical field
The present invention relates in Mould operation, produce the thermoforming process and the device of product, and relate more particularly to increase the thermoforming process and the device of the intensity of the product of producing by Mould operation by workpiece being heated to predetermined temperature or higher temperature.
Background technology
Although can produce various products, will be described with the torsion beam of the torsion beam type back axle suspension of vehicle a example as the product of being produced at this by thermoforming process and device.
Torsion beam type back axle suspension generally is made up of torsion beam and the trailing arm that is attached in the torsion beam opposed end; When vehicle turned round, torsion beam type back axle suspension was by the attitude that is kept vehicle owing to be applied to the centrifugal force on the vehicle body by the torsional moment that torsion beam produces.Therefore, require torsion beam to have high torsional rigidity and bending rigidity.
At first, torsion beam is the moulding by iron plate bending to being had U-shaped or V-arrangement cross section, and be provided with torsion bar in order to strengthen purpose, and the opposed end of torsion beam is soldered on the trailing arm by dividing other stiffener, has high torsional rigidity and bending rigidity to guarantee torsion beam.
For this structure, although torsion beam can satisfy the requirement of high torsional rigidity and bending rigidity satisfactorily by the intensity of strengthening, but there are the following problems for it: parts cause productivity ratio obviously to reduce such as the increase of quantity such as torsion bar and stiffener and the increase of quantity such as assembling and welding step, and in welding process, be very easy to the product that defective is with in appearance, and owing to the weight of final products increases the fuel efficiency that has reduced vehicle because the difficulty aspect the tolerance management makes.
Recently, in order to address these problems, form torsion beam by the compacting cylindrical tube, wherein, form double-deck U-shaped or V-arrangement cross section guaranteeing torsional rigidity at the middle section of torsion beam, and form " mouth " shape cross section in the both sides of torsion beam to guarantee bending rigidity and to guarantee to be used for the wide weld zone of trailing arm.This structure by torsion beam, compared with prior art, because torsion beam type back axle suspension can reduce parts and the procedure of processing quantity such as assembling and welding, simultaneously can guarantee enough torsional rigidities and bending rigidity again, therefore it is believed that and to increase production efficiency, and also can increase the fuel service efficiency of vehicle by the minimizing of weight, can also reduce the frequency of occurrences of faulty goods simultaneously.
Thisly have in the process of torsion beam of varying cross-section shape forming at different parts, because the increase of number of steps causes the decline of productivity ratio and the rising of production cost, thereby cause low price competitiveness, so people wish to obtain torsion beam with the procedure of processing of minimum number.
As conventional method and the device of producing product by the compacting cylindrical tube with U-shaped or V-arrangement cross section, be well known in the art use and comprise two molds, perhaps use the single mold that comprises single patrix and several counterdies that move mutually with difform counterdie.
Use the method for two molds to comprise preliminary preforming technique and ensuing precise forming technique, these technologies are by the pipe with the axle firm fixation carries out in the starting stage.The method of using single mold is to be carried out by the patrix of counterdie and lathe shape, and described counterdie is divided under the single centre module under module and two sidepieces, and counterdie moves each other along the guiding face that is limited between counterdie and the patrix or be limited between the counterdie.Use these traditional method and apparatus, it is believed that can produce cross section satisfactorily is U-shaped or be the product of V-arrangement entirely entirely.In addition, when these method and apparatus are applied in the product that different parts has the varying cross-section shape---such as the torsion beam (torsion beam) of torsion beam type back axle suspension (rear torsion beam axle suspension)---time, these method and apparatus are believed to produce product with the procedure of processing of minimum number.
Yet, when being formed on different parts and having varying cross-section shape and the interconnective continuously product of these varying cross-section shapes---such as torsion beam of torsion beam type back axle suspension---, there are following problem in aforesaid conventional method and device: owing to be difficult to the intensity of any end or deformable segment is increased above predetermined value, so any end of product or deformable portion are easy to be damaged in Mould operation or destroyed.
Summary of the invention
The present invention promptly is contemplated with solving aforesaid the problems of the prior art, and the purpose of this invention is to provide thermoforming process and the device that can produce symmetrical product.
Another object of the present invention provides the thermoforming process and the device of the intensity that can increase the product of producing by Mould operation.
Another purpose of the present invention provides and can reduce in Mould operation because warpage causes the thermoforming process and the device of faulty goods occurrence rate.
According to one aspect of the invention, a kind of thermal formation apparatus is provided, comprising: counterdie, place work piece on it; Patrix, itself and described counterdie coupling connection are to suppress described workpiece; Pattern, it is arranged between described patrix and the described counterdie to form the inner space of described workpiece; And cooling unit, it is used to cool off described workpiece.
Preferably, described cooling unit is arranged at least on one of them of described counterdie, described patrix and described pattern.Preferably, described cooling unit is formed in described counterdie, described patrix or the described pattern.
Described cooling unit can comprise: cooling path, and supply with cooling fluid by described cooling path and be transformed into martensite from austenite with institutional framework with described workpiece; Pump, it is fed into described cooling path with described cooling fluid; And cooling tube, it connects described cooling path and described pump.Preferably, described cooling path comprises mould path that is limited to described counterdie and described patrix inside and the pattern path that is limited to described pattern inside.Preferably, described pattern path comprises and sucks the path; With the discharge path around described suction path, the outer wall in the inwall of described discharge path and described suction path is preset distance at interval.
Preferably, described device comprises the ways that is arranged between described counterdie and the described patrix further.
Preferably, between described pattern, described counterdie and described patrix, be limited with space part.
Preferably, described device comprises the direct cooling path that described cooling fluid is supplied to described space part further.
Preferably, described direct cooling path is formed at least in one of them of described counterdie, described patrix and described pattern.
According to another aspect of the present invention, provide a kind of thermoforming process, comprised the steps: to make upper die and lower die and pattern and be positioned over workpiece coupling connection on the described counterdie, suppressed described workpiece then to carry out the thermoforming operation; Determine after the described workpiece of compacting, whether to have passed through Preset Time; If with passed through Preset Time, then cool off described workpiece by supplying with cooling fluid around the described workpiece.
The step of cooling off described workpiece can comprise the step that described workpiece is quenched, so that the temperature of described workpiece reaches predetermined temperature or lower temperature in the given time, thereby makes the institutional framework of described workpiece be transformed into martensite from austenite.
The step of cooling off described workpiece can comprise the step of one of them at least that makes described liquid circulation enter described patrix, described counterdie and described pattern.Preferably, cooling step comprises and makes liquid circulation enter counterdie, patrix or pattern.In other words, the present invention can realize different remodeling, for example, by make liquid circulation enter upper die and lower die and pattern one of them cools off workpiece at least, and alternately, cool off workpiece by circulating cooling liquid in order.
Preferably, thus the step of cooling off described workpiece comprises that described cooling fluid is fed into the path that is limited between described pattern, described patrix and the described counterdie makes described cooling fluid contact the step of described workpiece.
Described method can comprise the steps: further to determine whether described workpiece reaches predetermined temperature or lower temperature after the step of the described workpiece of cooling; And if described workpiece reaches predetermined temperature or lower temperature, then separate described patrix, described counterdie and described pattern to remove described workpiece.
Description of drawings
Above-mentioned and other purpose of the present invention, feature and advantage will become more obvious according to the description below in conjunction with the given one exemplary embodiment of accompanying drawing, wherein:
Fig. 1 is the perspective view of thermal formation apparatus according to an embodiment of the invention;
Fig. 2 is the front section view that illustrates according to the cooling path of the thermal formation apparatus of this embodiment of the invention;
Fig. 3 illustrates the side sectional view of the cooling path of thermal formation apparatus in accordance with another embodiment of the present invention;
Fig. 4 is the side sectional view in pattern path that the thermal formation apparatus of this another embodiment according to the present invention is shown;
Fig. 5 is the flow chart of thermoforming process according to an embodiment of the invention;
Fig. 6 is the perspective view by the torsion beam of the thermal formation apparatus of an embodiment according to the present invention and method production;
Fig. 7 is the cutaway view along Fig. 6 center line A-A;
Fig. 8 is the cutaway view along Fig. 6 center line B-B; With
Fig. 9 is the cutaway view along Fig. 6 center line C-C.
The specific embodiment
One exemplary embodiment of the present invention will be described in greater detail with reference to the accompanying drawings.For convenience of description, the present invention will be described based on the thermoforming process of the torsion beam type back axle suspension of vehicle.With clear, accompanying drawing may amplify the thickness of lines or the size of parts for convenience.In addition, term should be considered functions of components of the present invention and be defined as used herein, thereby can change according to user or operating personnel's custom or intention.Therefore, the qualification of these terms should be according to whole disclosure decisions set forth herein.At this, the word of use " " can exchange with " at least one " and use, and it means that one or more elements are described.
Fig. 1 is the perspective view of thermal formation apparatus according to an embodiment of the invention, and Fig. 2 is the front section view that illustrates according to the cooling path of the thermal formation apparatus of this embodiment of the invention.
See figures.1.and.2, comprise according to the thermal formation apparatus of an embodiment: pedestal 10; Counterdie 30, it is arranged on the pedestal 10 and makes workpiece can be placed on the counterdie 30; Patrix 20, it movably is arranged in the pedestal 10 and with counterdie 30 couplings and joins to be used for the thermoforming of workpiece; Pattern 40, its movably be arranged on the pedestal 10 and between patrix 20 and counterdie 30 to be used to form the cavity of workpiece; And cooling unit 50, it is set on counterdie 30, patrix 20 and the pattern 40 to be used for cooling off workpiece after thermoforming.
Described pedestal 10 comprises bottom base 12 and top base 14, described bottom base 12 is provided with on the ground and has a counterdie mounted thereto 30, described top base 14 is positioned at the top of bottom base 12 and moves in vertical direction by pedestal cylinder 16, and top base 14 has patrix mounted thereto 20.
When workpiece is positioned on the counterdie 30 and when driving pedestal cylinder 16 top base 14 and patrix 20 are descended, patrix 20 is associated in counterdie 30 couplings, makes it possible to carry out pressing operation by mould.
Described patrix 20 and counterdie 30 are heated to predetermined temperature or higher, to be used for the thermoforming of workpiece.Those of ordinary skills know the firing equipment (not shown) that is used for heating mould, therefore hereinafter no longer to its detailed description.In addition, because pedestal cylinder 16 is hydraulic cylinder known in the field equally, therefore hereinafter also no longer pedestal cylinder and operation thereof are described in detail.
Between counterdie 30 and patrix 20, be provided with ways 32, to be used to help accurate coupling connection between patrix 20 and the counterdie 30.
In addition, described ways 32 is used for guaranteeing that described workpiece is placed on the center of counterdie 30 exactly, so final products can have accurate symmetrical geometry.
Described ways 32 is made of the guide with certain size, and is positioned on the edge at recess place counterdie 30, that supply place work piece.The typical fixed component of guide utilization that constitutes ways 32 is such as the upper surface coupling connection with counterdie 30 such as bolt, rivet.
Described pattern 40 is separately positioned on a pair of pattern cylinder 42, and described pattern cylinder 42 flatly is arranged on the upper surface of bottom base 12.
When the arm of each pattern cylinder 42 when pattern cylinder 42 stretches out, the pattern 40 that is arranged on the arm end enters between patrix 20 and the counterdie 30, and when arm inserted in the pattern cylinder 42, pattern 40 shifted out the space that is defined between patrix 20 and the counterdie 30.
In having the described device of structure as mentioned above, when placing the cast workpiece on the counterdie 30 and driving pattern cylinder 42, pattern 40 inserts two opposite ends of workpiece respectively.
Then, when driving pedestal cylinder 16, patrix 20 descends and counterdie 30 couplings connection, carries out the thermoforming of workpiece then, thereby produces the product of wanting---and be torsion beam 70.
As mentioned above because be used to process the cast beam, comprise that the mould machinery of patrix 20, counterdie 30, pattern 40 is well known in the art, therefore dispense the decomposition diagram of patrix 20, counterdie 30 and pattern 40 at this.
Described cooling path 52 comprises mould path 52a that is limited to patrix 20 and counterdie 30 inside separately and the pattern path 52b that is limited to each pattern 40 inside.
Described cooling tube 54 comprises from the storage liquid container and extends to the mould tube 54a of patrix 20 and counterdie 30 and extend to the pattern pipe 54b of pattern 40 from the storage liquid container.
Described cooling tube 54 is provided with valve 56 in the part of extending from the storage liquid container, begins to cool down pipe 54 from valve 56 and is divided into mould tube 54a and pattern pipe 54b.
By this structure, after the thermoforming during driving pump, cooling fluid is supplied to along the cooling path 54 that is limited to counterdie 30, patrix 20 and pattern 40 inside, and the torsion beam 70 between counterdie 30, patrix 20 and pattern 40 is quenched makes it have predetermined temperature or lower temperature.
The suction path 52c of extension that described pattern path 52b comprises the end from pattern 40---being suction inlet---and around the discharge path 52d that sucks path 52c, the inwall of described discharge path 52d and the outer wall that sucks path 52c be preset distance at interval.
Therefore, be directed into the suction inlet of pattern 40 in cooling fluid after, cooling fluid is discharged from sucking path 52c along the other end that suction path 52c flows to pattern 40, flow along the space between the inwall of outer wall that sucks path 52c and discharge path 52d, and finally be discharged to the outside of pattern 40.
Fig. 3 illustrates the side sectional view of the cooling path of thermal formation apparatus according to another embodiment of the present invention, and Fig. 4 is the side sectional view that illustrates according to the pattern path of the thermal formation apparatus of this another embodiment.
With reference to Fig. 3 and Fig. 4, similar to the aforementioned embodiment according to the thermal formation apparatus of this embodiment, this embodiment also comprises counterdie 130, patrix 120, pattern 140 and cooling unit 150.Yet, according to the cooling unit 150 of the thermal formation apparatus of this embodiment because certain characteristics and can differentiating with the cooling unit of the foregoing description.
According to this embodiment, thermal formation apparatus comprises further cooling fluid is supplied to direct cooling path 110 in the space part 100.
Therefore, supplying with the cooling fluid that is used to cool off torsion beam 70 along direct cooling path 110 is convenient to cooling fluid and cools off torsion beam 70 by directly contacting with torsion beam 70 flowing to space part 100 backs.
Such structure is transformed into martensite with the microstructure that operation can be easy to torsion beam 70 from austenite, makes it possible to more effectively strengthen torsion beam 70.
Directly cooling path 110 can be formed at least in one of them of counterdie 130, patrix 120 and pattern 140.In this embodiment, direct cooling path 110 is illustrated as and is formed in the pattern 140.
Yet directly cooling path 110 can be formed in patrix 120 or the counterdie 130.Alternately, directly cooling path 110 can be formed by the connection of the coupling in each parts groove.
Be formed on situation in the pattern 140 for direct cooling path 110, preferably, directly cooling path 110 extends into the pattern 140 from the upper surface of pattern 140, and bending makes direct cooling path 110 be connected with space part 100 to extend in the space part 100 between the 152b of pattern path.
Next will describe the thermo shaping method that utilizes described device, described device has the structure of an embodiment according to the present invention.
Fig. 5 is the flow chart of thermoforming process according to an embodiment of the invention, Fig. 6 is the perspective view of the torsion beam of producing by this thermal formation apparatus with according to the method for this embodiment, Fig. 7 is the cutaway view along Fig. 6 center line A-A, Fig. 8 is the cutaway view along Fig. 6 center line B-B, and Fig. 9 is the cutaway view along Fig. 6 center line C-C.
Arrive Fig. 9 with reference to Fig. 5, the thermoforming process of this embodiment comprises makes patrix 20, counterdie 30 and pattern 40 and the workpiece coupling connection that is placed on the counterdie 30, suppress workpiece with production torsion beam 70 (being called " pressing operation " S10 hereinafter) by the thermoforming operation then, determine after pressing operation, whether to have passed through Preset Time (being called " thermoforming is finished and determined operation " S20 hereinafter), if finish definite Preset Time that passed through among definite operation S20 in thermoforming, then cool off torsion beam 70 (being called " cooling down operation " S30 hereinafter) by around torsion beam 70, supplying with cooling fluid, whether torsion beam has predetermined temperature or lower temperature (being called " temperature is determined operation " S40 hereinafter) after determining cooling down operation S30, if determine to determine among the operation S40 that in temperature torsion beam 70 has reached predetermined temperature or low temperature more, then separate patrix 20, counterdie 30 and pattern 40 are to remove torsion beam 70 (being called " lock out operation " S50 hereinafter).
To describe the thermoforming process of this embodiment hereinafter in detail.
At first, when the tubular metal workpiece was positioned on the counterdie 30 and drive pattern cylinder 42 this moment, pattern 40 was inserted into two opposite ends of workpiece.
Along with pedestal cylinder 16 is driven, patrix 20 is associated in counterdie 30 couplings, next carries out pressing operation S10 production torsion beam 70.
At this moment wait, patrix 20, counterdie 30 and pattern 40 are heated to 600～900 ℃ of temperature that are used for the thermoforming operation.
Thermoforming is finished and is determined that operation S20 measures the step that the thermoforming process is carried out the duration, and it can utilize typical Time Measurement Unit to carry out such as timer.
If finish definite Preset Time that passed through among definite operation S20 in thermoforming, then driving pump supplies to cooling fluid in counterdie 30, patrix 20 and the pattern 40 along cooling tube 54 and cooling path 52 with permission, thereby can carry out cooling down operation S30 so that torsion beam 70 is quenched.
In addition, cooling fluid is directed into pattern 40 by pattern pipe 54b after, cooling fluid flows to the inner end of each pattern 40 along suction path 52c, and from sucking path 52c discharge, flow along sucking the space that limits between path 52c and the discharge path 52d, be discharged to the outside of pattern 40 at last.
So, torsion beam 70 its temperature after accepting quenching dropped to 100～350 ℃ in about 1 second.
Through such cooling down operation S30, the temperature of torsion beam 70 drops in Preset Time and is lower than predetermined temperature or lower temperature, makes the institutional framework of torsion beam 70 be transformed into martensite from austenite, thereby increases the intensity of torsion beam 70.
At this moment wait, when cooling fluid circulation time in counterdie 30, patrix 20 and pattern 40, cooling fluid cooling torsion beam 70.
Alternately, cooling down operation S30 can only enter counterdie 30 and patrix 20 or only enter counterdie 30 circulation times and finish in cooling fluid.
In addition, cooling down operation S30 may further include the step that cooling fluid is directly supplied to torsion beam 70, thereby quickens cooldown rate, changes the martensitic structure structure into further acceleration workpiece.
For this purpose, thermoforming process can use according to the thermal formation apparatus execution of embodiment as shown in Figure 3 and Figure 4.
In this method, when starting cooling step S30, cooling fluid is fed into cooling path 152 and is fed into space part 100 along direct cooling path 110 simultaneously.
Therefore, when patrix 120, counterdie 130 and pattern 140 are cooled, cooled off apace with the torsion beam 70 that patrix 120, counterdie 130 and pattern 140 contact.At this moment, the cooling fluid that supplies in the space part 100 contacts with torsion beam 70, has accelerated the cooling of torsion beam 70, therefore can realize more effective cooling down operation.
Temperature determines that operation S40 is a step of measuring the supply duration of cooling fluid, and can use typical time measurement device to determine to carry out among the operation S20 such as finishing in thermoforming.If determine to determine to have passed through Preset Time among the operation S40, then by finishing the manufacturing that cooling down operation S30 finishes torsion beam in temperature.
Then, carry out lock out operation S50 as follows: drive pedestal cylinder 16 and pattern cylinder 42 along counter-clockwise direction,, the pattern 40 and the opposed end of torsion beam 70 are separated to separate patrix 20 and counterdie 30.
By the structure and the operation of device as mentioned above, formed following torsion beam 70: the cross section of its arbitrary end 74 is square; Cross section at zone line 72 is a V-arrangement, and the closely contact mutually of upper and lower surface; And the cross section of the join domain 76 between zone line 72 and arbitrary end 74 is the combined shaped of square cross section and v-depression, and wherein the v-depression of join domain 76 is formed on its central upper portion.
From foregoing description obviously as can be known, thermal formation apparatus of the present invention is provided with ways, ways is used for guaranteeing that workpiece is positioned at counterdie in the heart when patrix and counterdie coupling connection, and prevents workpiece from misalignment, thereby the torsion beam with left-right symmetry structure is provided.
In addition, for thermal formation apparatus of the present invention and method, cooling unit is set in thermal formation apparatus to quench to the torsion beam of thermoforming being used for, to help torsion beam to be transformed into stable at low temperatures martensitic structure from high temperature stable austenite structure, thereby increased the intensity of workpiece, prevented the deformation and failure of torsion beam effectively.
In addition, according to the present invention, thermoforming and quenching are carried out in single technical process, and, the product of thermoforming is accepted quenching through Preset Time after thermoforming, therefore simplified technical process and reduced the occurrence frequency that produces faulty goods in Mould operation.
Although reference example and accompanying drawing are described the present invention, but these embodiment that provide are for illustrative purpose, and those of ordinary skills obviously can carry out the embodiment that various modifications and acquisition are equal to the present invention according to these embodiment disclosed herein.
In addition, although based on the torsion beam of the torsion beam type back axle suspension of vehicle as an example and invention has been described, the present invention can be used to the torsion beam of other application scenario and be not limited to vehicle.Therefore, scope of the present invention should only be limited by the accompanying claims.
Claims (18)
1, a kind of thermal formation apparatus comprises:
Counterdie, place work piece on it;
Patrix, itself and described counterdie coupling connection are to suppress described workpiece;
Pattern, it is arranged between described patrix and the described counterdie to form the inner space of described workpiece; With
Cooling unit, it is used to cool off described workpiece.
2, thermal formation apparatus according to claim 1, wherein said cooling unit are arranged at least on one of them of described counterdie, described patrix and described pattern.
3, thermal formation apparatus according to claim 2, wherein said cooling unit are formed in described counterdie, described patrix or the described pattern.
4, thermal formation apparatus according to claim 1, wherein said cooling unit comprises:
Cooling path is supplied with cooling fluid by described cooling path and is transformed into martensite with the institutional framework with described workpiece from austenite;
Pump, it is fed into described cooling path with described cooling fluid; With
Cooling tube, it connects described cooling path and described pump.
5, thermal formation apparatus according to claim 4, wherein said cooling path comprise mould path that is limited to described counterdie and described patrix inside and the pattern path that is limited to described pattern inside.
6, thermal formation apparatus according to claim 5, wherein said pattern path comprise the suction path; With
Around the discharge path in described suction path, the outer wall in the inwall of described discharge path and described suction path is preset distance at interval.
7, thermal formation apparatus according to claim 1 comprises further: be arranged on the ways between described counterdie and the described patrix.
8, thermal formation apparatus according to claim 1 wherein is limited with space part between described pattern, described counterdie and described patrix.
9, thermal formation apparatus according to claim 8 comprises further: the direct cooling path that described cooling fluid is supplied to described space part.
10, thermal formation apparatus according to claim 9, wherein said direct cooling path are formed at least in one of them of described counterdie, described patrix and described pattern.
11, a kind of thermoforming process comprises the steps:
The workpiece coupling that makes upper die and lower die and pattern and be positioned on the described counterdie joins, and suppresses described workpiece then to carry out the thermoforming operation;
Determine after the described workpiece of compacting, whether to have passed through Preset Time; With
If passed through Preset Time, then cool off described workpiece by around described workpiece, supplying with cooling fluid.
12, thermoforming process according to claim 11, the step of wherein cooling off described workpiece comprises the step that described workpiece is quenched, so that the temperature of described workpiece reaches predetermined temperature or lower temperature in the given time, thereby make the institutional framework of described workpiece be transformed into martensite from austenite.
13, thermoforming process according to claim 11, the step of wherein cooling off described workpiece comprise the step of one of them at least that makes described liquid circulation enter described patrix, described counterdie and described pattern.
14, thermoforming process according to claim 13, the step of wherein cooling off described workpiece comprise the step that makes described liquid circulation enter described counterdie.
15, thermoforming process according to claim 13, the step of wherein cooling off described workpiece comprise the step that makes described liquid circulation enter described patrix.
16, thermoforming process according to claim 13, the step of wherein cooling off described workpiece comprise the step that makes described liquid circulation enter described pattern.
17, thermoforming process according to claim 13, thus the step of wherein cooling off described workpiece comprises that described cooling fluid is fed into the path that is limited between described pattern, described patrix and the described counterdie makes described cooling fluid contact the step of described workpiece.
18, thermoforming process according to claim 11 comprises the steps: further
Determine whether described workpiece reaches predetermined temperature or lower temperature after the step of the described workpiece of cooling; With
If described workpiece reaches predetermined temperature or lower temperature, then separate described patrix, described counterdie and described pattern to remove described workpiece.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2007-0050418 | 2007-05-23 | ||
| KR1020070050418 | 2007-05-23 | ||
| KR1020070050418A KR100907225B1 (en) | 2007-05-23 | 2007-05-23 | Hot forming apparatus and hot forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101342559A true CN101342559A (en) | 2009-01-14 |
| CN101342559B CN101342559B (en) | 2010-09-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100977406A Active CN101342559B (en) | 2007-05-23 | 2008-05-23 | Hot forming apparatus and hot forming method |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20080289393A1 (en) |
| KR (1) | KR100907225B1 (en) |
| CN (1) | CN101342559B (en) |
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| CN106180347A (en) * | 2014-07-11 | 2016-12-07 | 韩雨桐 | A kind of hollow unit low pressure thermal forming device |
| CN111206459A (en) * | 2020-01-09 | 2020-05-29 | 广西福斯派环保科技有限公司 | Compression molding device and method for molded product |
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| US3529458A (en) * | 1967-12-15 | 1970-09-22 | Pressed Steel Fisher Ltd | Method of forming sheet or plate material |
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| US3703093A (en) * | 1969-11-11 | 1972-11-21 | Aisin Seiki | Process and apparatus for performing a simultaneous and combined press-forming and heat-treatment of steel stock |
| JPS52120252A (en) * | 1976-04-02 | 1977-10-08 | Honda Motor Co Ltd | Method and device for forging thin plate member |
| US4637844A (en) * | 1985-07-08 | 1987-01-20 | Tocco, Inc. | Method for heat treating ferrous parts |
| SE507023C2 (en) * | 1996-03-18 | 1998-03-16 | Accra Teknik Ab | Process and molding tool for producing curved and cured profile elements |
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| US6322645B1 (en) * | 1999-09-24 | 2001-11-27 | William C. Dykstra | Method of forming a tubular blank into a structural component and die therefor |
| KR100420535B1 (en) | 2000-08-08 | 2004-03-02 | (주)새터 엔지니어링 | Press-Hardening Process using boron-added Low carbon steel |
| KR100366856B1 (en) | 2000-12-06 | 2003-01-09 | 표문기 | conduction of heat cooling type sleeve |
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| KR100692723B1 (en) | 2005-07-26 | 2007-03-09 | 현대자동차주식회사 | Method for manufacturing center pillar of vehicle using simultaneous hot stamping |
| KR100797370B1 (en) * | 2006-12-11 | 2008-01-22 | 주식회사 포스코 | Method for manufacturing torsion beam of tubular ctba and torsion beam manufactured by the same |
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2007
- 2007-05-23 KR KR1020070050418A patent/KR100907225B1/en active IP Right Grant
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2008
- 2008-05-22 US US12/125,789 patent/US20080289393A1/en not_active Abandoned
- 2008-05-23 CN CN2008100977406A patent/CN101342559B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103003002A (en) * | 2010-05-12 | 2013-03-27 | 福斯特阿尔派因钢铁有限公司 | Method for producing a structural part from an iron-manganese-steel sheet |
| CN103648807A (en) * | 2011-09-14 | 2014-03-19 | 株式会社威泰克 | Hollow member and method for manufacturing hollow member |
| CN104651582A (en) * | 2014-06-26 | 2015-05-27 | 上海汇众汽车制造有限公司 | Manufacturing method of high-strength tubular cross beam of automobile rear axle and overall quenching clamp for high-strength tubular cross beam |
| CN106180346A (en) * | 2014-07-11 | 2016-12-07 | 韩雨桐 | A kind of low pressure thermal forming device |
| CN106180347A (en) * | 2014-07-11 | 2016-12-07 | 韩雨桐 | A kind of hollow unit low pressure thermal forming device |
| CN106180345A (en) * | 2014-07-11 | 2016-12-07 | 初冠南 | A kind of high intensity or the inductile material hot formed method of hollow unit low pressure |
| CN106180345B (en) * | 2014-07-11 | 2018-07-20 | 佛山市顺德区欣庆五金塑料有限公司 | A kind of high intensity or the hot formed method of inductile material hollow unit low pressure |
| CN104525752A (en) * | 2014-12-08 | 2015-04-22 | 无锡朗贤汽车组件研发中心有限公司 | Thermal forming and water cooling process of uniform-section boron steel pipe |
| CN104525752B (en) * | 2014-12-08 | 2017-01-18 | 无锡朗贤汽车组件研发中心有限公司 | Thermal forming and water cooling process of uniform-section boron steel pipe |
| CN105290222A (en) * | 2015-11-17 | 2016-02-03 | 重庆天人汽车车身制造有限公司 | Pneumatic torsion beam stamping die holder assembly |
| CN111206459A (en) * | 2020-01-09 | 2020-05-29 | 广西福斯派环保科技有限公司 | Compression molding device and method for molded product |
| CN111206459B (en) * | 2020-01-09 | 2021-09-17 | 广西福斯派环保科技有限公司 | Compression molding device and method for molded product |
| CN114273513A (en) * | 2020-09-27 | 2022-04-05 | 宝山钢铁股份有限公司 | Device for manufacturing torsion beam with closed section and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080289393A1 (en) | 2008-11-27 |
| KR20080103300A (en) | 2008-11-27 |
| CN101342559B (en) | 2010-09-01 |
| KR100907225B1 (en) | 2009-07-10 |
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