US20190247906A1 - Hot press forming apparatus and hot press forming method - Google Patents

Hot press forming apparatus and hot press forming method Download PDF

Info

Publication number
US20190247906A1
US20190247906A1 US16/395,211 US201916395211A US2019247906A1 US 20190247906 A1 US20190247906 A1 US 20190247906A1 US 201916395211 A US201916395211 A US 201916395211A US 2019247906 A1 US2019247906 A1 US 2019247906A1
Authority
US
United States
Prior art keywords
trim
punch
die
sheet material
blank sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/395,211
Other languages
English (en)
Inventor
Tsutomu SERIZAWA
Koji OHBUCHI
Tamiya KIKAWA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unipres Corp
Original Assignee
Unipres Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Unipres Corp filed Critical Unipres Corp
Assigned to UNIPRES CORPORATION reassignment UNIPRES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KIKAWA, TAMIYA, OHBUCHI, KOJI, SERIZAWA, TSUTOMU
Publication of US20190247906A1 publication Critical patent/US20190247906A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • 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
    • B21D22/20—Deep-drawing
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
    • 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
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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

Definitions

  • the present invention relates to a hot press forming apparatus that heats a blank sheet material made of a steel material to an austenizing temperature and forms and quenches the heated blank sheet material by using a low-temperature die to form the blank sheet material, and a hot press forming method using the hot press forming apparatus.
  • a to-be-formed blank sheet material is heated to an austenizing temperature (austenite temperature) from 750° C. to 1000° C. for quenching, and is supplied in the heated state into a die to form. Then, the heated blank sheet material is rapidly cooled and quenched by the low-temperature die at the end of clamping of the die, is transformed into a martensite structure and hardened. For that reason, according to the hot press process, an independent quenching process is not necessary and a press-formed work with high strength can be manufactured by low cost. Therefore, the hot press process is suitable for a vehicle body component manufactured by press forming, such as door impact beam or a center pillar of an automobile, and is widely applied for this reason.
  • an austenizing temperature austenite temperature
  • the problem of the delayed fracture in the press-formed work after the forming can be solved by performing laser piercing process or laser trimming process on the formed work after the quenching.
  • this hot press forming apparatus is configured to have a die including a die a as a mobile type and a punch b as a stationary type.
  • the die a has a recessed fitting portion d that is formed on a center of a die-side forming surface portion c.
  • the punch b has a raised portion f that is formed corresponding to the recessed fitting portion d on a center of a punch-side forming surface portion e.
  • An outer edge portion h of the punch-side forming surface portion e cooperates with a trimming blade g that is formed on an outer edge portion of the die-side forming surface portion c to configure the trimming tool i.
  • a blank sheet material j that is heated to an austenizing temperature is supplied between the die-side forming surface portion c and the punch-side forming surface portion e.
  • the die a is moved toward the punch b, the recessed fitting portion d of the die-side forming surface portion c is fit in a raised portion f of the punch-side forming surface portion e to form the blank sheet material j.
  • a protruding portion k is gradually formed in a predetermined shape on the blank sheet material j, and the trimming blade g of the die-side forming surface portion c abuts on the blank sheet material j.
  • the die a is further moved toward the punch b side. Accordingly, as shown in FIG. 7 , the forming of the protruding portion k on the blank sheet material j further goes on.
  • a trim portion m as a margin on a margin of the blank sheet material j is bent by a cooperation of the outer edge portion h and the trimming blade g, and accordingly, the trimming process starts.
  • the trim portion m is torn off (fractured) from the blank sheet material j by the cooperation of the trimming blade g and the outer edge portion h, and the trimming process ends (the state shown in FIG. 8 ).
  • the blank sheet material j is formed so as to have a hat cross section having a protruding portion that has a predetermined shape, and a press-formed work is completed.
  • the conventional hot press forming processing technology is still a technology of heating a blank sheet material to an austenizing temperature, forming the heated steel material by a die including the low-temperature die a and punch b, and quenching the steel material.
  • the trimming process by the trimming tool i is performed in such a state that the blank sheet material is unhardened yet during the press forming by the die.
  • the trimming process performed during the hot press forming is performed on a blank sheet material that has not undergone the quench-hardening process in the still high-temperature state, the residual stress generated on the trimming portion to be cut off can be low, thereby making an effect of eliminating the occurrence of the delayed fracture.
  • Patent Document 1 Japanese Patent Application Publication No. 2005-248253
  • Patent Document 2 Japanese Patent Application Publication No. 2011-92946
  • the trimming process when the trimming process is to be performed, the trimming process is performed on the trim portion m that remains in such a state that the trim portion m is not supported or held by the punch b, that is, remains in a so-called aerial cutting state.
  • the trimming process of cutting off the trim portion m by the aerial cutting is performed on the trim portion m that remains in the not-held state.
  • “burrs” are formed on a cut surface present on a component of the press-formed work of the blank sheet material j.
  • the present invention provides a hot press forming apparatus and a hot press forming method that can eliminate the burrs-occurring on the press-formed work by the trimming process during the hot press forming process even with a configuration in which the trimming process is performed on a high-temperature blank sheet material, which eliminates the hand-work process for deburring performed after forming and enables the reduction of the processing man-hours and consequently, cost-down of the products.
  • the hot press forming apparatus may have a press forming apparatus configured to form a pre-heated blank sheet material into a shape of a press-formed work by clamping a die having a forming surface portion on a punch having a forming surface portion.
  • the hot press forming apparatus may have a trim portion cut-off apparatus configured to trim a trim portion as a margin being a portion of the blank sheet material that is not included in the press-formed work.
  • the hot press forming apparatus may have a quench-hardening apparatus configured to quench and harden the heated blank sheet material by rapidly cooling while being clamped between the punch and the die.
  • the trim portion cut-off apparatus may have a trim holding step formed forward so as to protrude toward the punch at the outer margin of the die-side forming surface portion.
  • the trim portion cut-off apparatus may have a trimming tool that includes a trimming blade formed on a tip end corner on an inner margin of the trim holding step, and a tip end corner formed on the outer margin of the punch-side forming surface portion.
  • the trim portion cut-off apparatus may have a cut holder surrounded the outer margin of the punch-side forming surface portion so as to face the trim holding step.
  • the trim portion cut-off apparatus may have a spring mechanism that is provided on the punch and that supports the cut holder in such a state that the cut holder is elastically energized toward the trim holding step, the cut holder being movable closer to/away from the trim holding step.
  • the trim portion may be clamped between the trim holding step and the cut holder in such a state that elastic force of the spring mechanism is being applied.
  • the trimming blade may be relatively moved along the outer margin of the punch-side forming surface portion while the cut holder opposes elastic force of the spring mechanism by receiving pressing force of the trim holding step so that the trimming blade may shear and cut off the trim portion between the trimming blade and the tip end corner on the outer margin of the punch-side forming surface portion.
  • the quench-hardening apparatus may quench the blank sheet material by clamping the blank sheet material between the punch and the die finally.
  • the hot press forming method is a hot press forming method using the hot press forming apparatus.
  • the hot press forming apparatus may have a press forming apparatus configured to form a pre-heated blank sheet material into a shape of a press-formed work by clamping the blank sheet material between a die having a forming surface portion and a punch having a forming surface portion.
  • the hot press forming apparatus may have a trim portion cut-off apparatus configured to trim a trim portion as a margin being a portion of the blank sheet material that is not included in the press-formed work.
  • the hot press forming apparatus may have a quench-hardening apparatus configured to quench and harden the heated blank sheet material by rapidly cooling while the heated blank sheet is clamped between the punch and the die.
  • the trim portion cut-off apparatus may have a trim holding step formed forward so as to protrude toward the punch at the outer margin of the die-side forming surface portion.
  • the trim portion cut-off apparatus may have a trimming tool that includes a trimming blade formed on a tip end corner on an inner margin of the trim holding step, and a tip end corner formed on the outer margin of the punch-side forming surface portion.
  • the trim portion cut-off apparatus may have a cut holder surrounded the outer margin of the punch-side forming surface portion so as to face the trim holding step.
  • the trim portion cut-off apparatus may have a spring mechanism that is provided on the punch and that supports the cut holder in such a state that the cut holder is elastically energized toward the trim holding step, the cut holder being movable closer to/away from the trim holding step.
  • the hot press forming method may include: during a press forming process of forming the blank sheet material while the press forming apparatus is clamping the blank sheet material between the die and the punch, clamping the trim portion between the trim holding step and the cut holder in such a state that elastic force of the spring mechanism is being applied.
  • the hot press forming method may include: as a press forming operation by the die goes on, shearing and cutting off, by the trimming blade, the trim portion between the trimming blade and the tip end corner on the outer margin of the punch-side forming surface portion by causing the trimming blade to relatively move along the outer margin of the punch-side forming surface portion while causing the cut holder to oppose elastic force of the spring mechanism by receiving pressing force of the trim holding step.
  • the hot press forming method may include: after the cutting off process of the trim portion by the trim portion cut-off apparatus ends, quenching, by the quench-hardening apparatus, the blank sheet material by clamping the blank sheet material between the punch and the die finally.
  • the cut holder is configured to cooperate with the trim holding step to clamp the trim portion
  • the spring mechanism is configured to support the spring mechanism. Accordingly, as the forming of the blank sheet material goes on, accompanied by the progress of the press forming operation by the die, the trim holding step presses and moves the cut holder while causing the cut holder to oppose elastic force of the spring mechanism. As the process of pressing and moving goes on, the spring mechanism is contracted, and accordingly, the clamping force to the trim portion between the cut holder and the trim holding step is gradually increased while the cut holder increases the reaction force.
  • the blank sheet material can be drawn to two forming surfaces of each of the die and the punch with approximately no resistance, and the blank sheet material feed to the two forming surface portions is not impeded. As a result, the blank sheet material can be formed into a desired thickness or a desired shape by the punch and the die, thereby obtaining a desired press-formed work.
  • the clamping force between the cut holder and the trim holding step before the trim portion is cut off is small because the degree of expansion/contraction of the spring mechanism is extremely slight, and the temperature fall by heat dissipation of the pre-heated blank sheet material is suppressed by clamping the trim portion between the cut holder and the trim holding step. Accordingly, by the early hardening of the blank sheet material, that the material cannot be fed to the forming die including the die and the punch can be prevented. Therefore, occurrence of the worst phenomenon such as material crack of the blank sheet material can be prevented. Also, a press-formed work having desired strength can be formed when the subsequent cooling and quenching is to be performed on the blank sheet material after finally clamping the blank sheet material between the punch and the die.
  • the trim holding step causes the spring mechanism to be largely contracted according to the clamping operation by the die, and accordingly, the degree of contraction of the spring mechanism that supports the cut holder becomes high.
  • a large reaction force is generated on the cut holder on the trim holding step, and the clamping force on the trim portion between the cut holder and the trim holding step extremely increases.
  • the blank sheet material before the quench-hardening right before the final forming step is firmly clamped by the cut holder and the trim holding step.
  • the so-called aerial cutting by which the trim portion is torn off while being bent as the prior art, does not occur. Consequently, no burr is formed on the completed press-formed work. Therefore, the deburring process performed after the pressed product is completed can be eliminated, thereby achieving the reduction of the processing man-hours and consequently, the product cost reduction.
  • FIG. 1 is a schematic longitudinal cross-sectional view illustrating one example of a state that a blank sheet material is set at the time of die-opening of a die on a punch of a hot press forming apparatus according to one embodiment.
  • FIG. 2 is a schematic longitudinal cross-sectional view illustrating one example of a process in the middle of press forming of the blank sheet material in such a state that the blank sheet material is formed by clamping the blank sheet material between the die and the punch from the die-opening state in FIG. 1 and the trim portion is clamped between the cut holder of the punch and the trim holding step of the die.
  • FIG. 3 is a schematic longitudinal cross-sectional view illustrating one example of a state that the cutting off of the trim portion starts between the trimming blade of the die and a tip end corner formed on the outer margin of the punch-side forming surface portion when the clamping of the die on the punch goes on from the state of the process in the middle of press forming the blank sheet material in FIG. 2 .
  • FIG. 4 is a schematic longitudinal cross-sectional view illustrating one example of a state that the clamping of the die on the punch further goes on from the state that the shearing and cutting off of the trim portion starts in FIG. 3 , and after the trim portion is sheared and cut off by the trimming blade of the die and the tip end corner formed on the outer margin of the punch-side forming surface portion, the quenching of the blank sheet material by clamping the blank sheet material between the die and the punch finally is to be performed.
  • FIG. 5 is a schematic longitudinal cross-sectional view illustrating a state that a blank sheet material is set at the time of die-opening of a punch on a die of a conventional hot press forming apparatus.
  • FIG. 6 is a schematic longitudinal cross-sectional view illustrating a process in the middle of press forming of the blank sheet material by clamping the die on the punch from the die-opening state in FIG. 5 .
  • FIG. 7 is a schematic longitudinal cross-sectional view illustrating a state that the clamping of the die on the punch goes on from the state of the process in the middle of press forming of the blank sheet material in FIG. 6 and the cutting off of the trim portion starts.
  • FIG. 8 is a schematic longitudinal cross-sectional view illustrating a state that the clamping of the die on the punch further goes on from the state that the cutting off of the trim portion starts in FIG. 7 , after the trim portion is cut off, the quenching of the blank sheet material by clamping the blank sheet material between the die and the punch finally is performed.
  • the burrs-occurring on the press-formed work by the trimming process in the hot press forming process is eliminated, thereby eliminating the deburring process performed after the forming and achieving the reduction of the processing man-hours and consequently, the product cost reduction.
  • the hot press forming apparatus has a die including a die 1 as a mobile type and a punch 2 as a stationary type, similar to the prior art. Then, each of the die 1 and the punch 2 has forming surface portions 4 , 5 made to form a blank sheet material 3 to be a press-formed work (not shown in the drawings) presenting a predetermined shape, for example, a hat cross section.
  • a recessed fitting portion 4 a is formed on a center of the die-side forming surface portion 4 .
  • a raised portion 5 a is formed facing the recessed fitting portion 4 a .
  • the recessed fitting portion 4 a and the raised portion 5 a cooperate with each other to form the blank sheet material 3 into the press-formed-work shape being the hat cross section.
  • the die 1 having the die-side forming surface portion 4 on which the recessed fitting portion 4 a is formed and the punch 2 having the punch-side forming surface portion 5 on which the raised portion 5 a is formed configure a press forming apparatus to form the press-formed work having the hat cross section.
  • the trim holding step 6 that protrudes toward the punch 2 is formed forward at the outer margin 4 b of the die-side forming surface portion 4 .
  • the trimming blade 7 is formed on the tip end corner in an inner margin 6 a of the trim holding step 6 .
  • the trimming blade 7 and a tip end corner 5 c formed on an outer margin 5 b of the punch-side forming surface portion 5 configure a trimming tool.
  • the cut holder 8 is arranged facing the trim holding step 6 and being adjacent to the outer margin 5 b of the punch-side forming surface portion 5 .
  • the cut holder 8 is configured to be movable along the outer margin 5 b of the punch-side forming surface portion 5 by being pressed on the trim holding step 6 accompanied by the forming operation by the die 1 in such a state that the cut holder 8 is elastically energized toward the trim holding step 6 by a spring mechanism 9 provided on the punch 2 .
  • the spring mechanism 9 can be configured by using a coil spring or a pneumatic or hydraulic cylinder.
  • the press forming apparatus As a result, during the press forming process, by the press forming apparatus, of forming the blank sheet material 3 while moving the die 1 toward the punch 2 and clamping the die 1 , the trim holding step 6 and the cut holder 8 clamp the trim portion 3 a being the margin of the blank sheet material 3 in such a state that the elastic force of the spring mechanism 9 is being applied.
  • the trim portion cut-off apparatus causes the cut holder 8 to relatively move along the outer margin 5 b of the punch-side forming surface portion 5 while causing the cut holder 8 to oppose the elastic force of the spring mechanism 9 and applying the pressing force of the trim holding step 6 to the trimming blade 7 .
  • the trim portion cut-off apparatus is configured to shear and cut off the trim portion 3 a between the trimming blade 7 and a tip end corner 5 c on the outer margin 5 b of the punch-side forming surface portion 5 .
  • the quench-hardening apparatus is configured to: after the trim portion cutting-off process by the trim portion cut-off apparatus ends, quench the blank sheet material 3 by clamping the blank sheet material 3 between the die 1 and the punch 2 finally and rapidly cooling them by using a cooling system or the like which is not shown in the drawings.
  • the blank sheet material 3 is formed by the below processes to obtain the press-formed work.
  • the blank sheet material 3 heated to an austenizing temperature is supplied and set between the die-side forming surface portion 4 of the die 1 that is opened relative to the punch 2 and the punch-side forming surface portion 5 of the punch 2 .
  • the die 1 is moved toward the punch 2 and the punch-side forming surface portion 5 is fit in the recessed fitting portion 4 a of the die-side forming surface portion 4 to form the blank sheet material 3 .
  • a protruding portion is formed on the blank sheet material 3 by an effect of the recessed fitting portion 4 a and the raised portion 5 a , as shown in FIG. 2 .
  • the cut holder 8 is flush with the punch-side forming surface portion 5 or protrudes to the trim holding step 6 by the elastic force of the spring mechanism 9 , the cut holder 8 and the trim holding step 6 receive the elastic force of the spring mechanism 9 to clamp the trim portion 3 a being the margin of the blank sheet material 3 .
  • the cut holder 8 receives the pressing force of the trim holding step 6 , and is relatively moved along the outer margin 5 b of the punch-side forming surface portion 5 while opposing the elastic force of the spring mechanism 9 .
  • the shearing of the trim portion 3 a that is kept being clamped between the cut holder 8 and the trimming trim holding step 6 goes on.
  • the trim portion 3 a is sheared and cut off from the main body portion constituting the press-formed work of the blank sheet material 3 .
  • the cut holder 8 that cooperates with the trim holding step 6 to clamp the trim portion 3 a is supported by the spring mechanism 9 .
  • the trim holding step 6 causes the cut holder 8 to be moved while pressing the cut holder 8 opposing the elastic force of the spring mechanism 9 accompanied by the progress of the press forming operation by the die 1 .
  • the spring mechanism 9 is contracted and the cut holder 8 generates the reaction force to gradually increase the clamping force on the trim portion 3 a between the cut holder 8 and the trim holding step 6 .
  • the degree of contraction of the spring mechanism 9 is still low and the reaction force on the cut holder 8 by the spring mechanism 9 is small. Accordingly, the clamping force on the trim portion 3 a between the cut holder 8 and the trim holding step 6 is extremely slight.
  • the blank sheet material 3 can be drawn to the forming surface portions 4 , 5 of each of the die 1 and the punch 2 with approximately no resistance and the blank sheet material 3 feed to the forming surface portions 4 , 5 is not impeded.
  • the clamping force between the cut holder 8 and the trim holding step 6 is small. Therefore, the pre-heated blank sheet material 3 dissipates the heat by clamping the trim portion 3 a by the cut holder 8 and the trim holding step 6 , and the temperature fall can be suppressed from occurring. That the material cannot be fed to the forming die configured with the die 1 and the punch 2 due to the early hardening of the blank sheet material 3 and the occurrence of the worst phenomenon such as the material crack of the blank sheet material 3 can be prevented. Furthermore, the press-formed work having desired strength can be formed when the subsequent cooling and quenching is to be performed on the blank sheet material 3 after the final clamping is performed on the punch 2 and the die 1 .
  • the spring mechanism 9 is largely contracted according to the clamping operation by the die 1 on the trim holding step 6 , and accordingly, the degree of contraction of the spring mechanism 9 that supports the cut holder 8 becomes high.
  • large reaction force on the trim holding step 6 is generated on the cut holder 8 , and the clamping force on the trim portion 3 a between the cut holder 8 and the trim holding step 6 extremely increases.
  • the blank sheet material 3 before quench-hardening right before the final forming step is firmly clamped by the cut holder 8 and the trim holding step 6 .
  • the so-called aerial cutting by which the trim portion is torn off while being bent as the prior art does not occur. Accordingly, the burrs are not occurred in the completed press-formed work. Therefore, the deburring process performed after the pressed product is completed is eliminated, thereby achieving the reduction of the processing man-hours, and consequently the product cost reduction.
  • the burrs-occurring on the press-formed work by the trimming process during the hot press forming process can be eliminated even with a configuration in which the trimming process is performed on a high-temperature blank sheet material. Accordingly, the deburring process performed after forming is eliminated, thereby achieving the reduction of the processing man-hours, and consequently, the product cost reduction.
  • the hot press forming apparatus of forming by heating a blank sheet material made of a steel material to an austenizing temperature and forming and quenching the heated steel material by using a low-temperature die, and the hot press forming method using the hot press forming apparatus are suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Punching Or Piercing (AREA)
  • Forging (AREA)
US16/395,211 2016-11-01 2019-04-25 Hot press forming apparatus and hot press forming method Abandoned US20190247906A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2016-214708 2016-11-01
JP2016214708 2016-11-01
PCT/JP2017/004827 WO2018083814A1 (ja) 2016-11-01 2017-02-09 ホットプレス加工装置並びにホットプレス加工方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2017/004827 Continuation WO2018083814A1 (ja) 2016-11-01 2017-02-09 ホットプレス加工装置並びにホットプレス加工方法

Publications (1)

Publication Number Publication Date
US20190247906A1 true US20190247906A1 (en) 2019-08-15

Family

ID=62076435

Family Applications (1)

Application Number Title Priority Date Filing Date
US16/395,211 Abandoned US20190247906A1 (en) 2016-11-01 2019-04-25 Hot press forming apparatus and hot press forming method

Country Status (6)

Country Link
US (1) US20190247906A1 (es)
EP (1) EP3520917A1 (es)
JP (1) JPWO2018083814A1 (es)
CN (1) CN109843463A (es)
MX (1) MX2019004639A (es)
WO (1) WO2018083814A1 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200038976A1 (en) * 2018-08-02 2020-02-06 Toyota Jidosha Kabushiki Kaisha Splitting apparatus and splitting method
US11267035B2 (en) * 2018-06-23 2022-03-08 Dongguan University Of Technology Integrated flattening, cutting, and collecting assembly capable of integrity maintenance

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108723198B (zh) * 2018-06-19 2024-03-12 广州市翔翎金属制品有限公司 一种钣金件拉伸模具及钣金件拉伸方法
CN111344080A (zh) * 2018-08-15 2020-06-26 优尼冲压株式会社 冲压成形装置和制造方法
CN109774108A (zh) * 2019-01-16 2019-05-21 梁格 一种塑料板料压制机
JP7172832B2 (ja) * 2019-04-23 2022-11-16 日本製鉄株式会社 熱間プレス成形品の製造方法
CN112475215A (zh) * 2020-10-27 2021-03-12 青岛征和工业股份有限公司 一种过渡链板的折弯方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140096583A1 (en) * 2012-10-05 2014-04-10 Hyundai Motor Company Device and method for hot stamping

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005248253A (ja) 2004-03-04 2005-09-15 Unipres Corp 鋼材のホットプレス加工方法及び装置
DE102006040224A1 (de) * 2006-08-28 2008-03-20 Magna Automotive Services Gmbh Verfahren und Werkzeug zum Warmumformen eines Metallwerkstücks
DE102008034996B4 (de) * 2008-07-25 2010-11-18 Benteler Automobiltechnik Gmbh Vorrichtung zum Warmformen, Presshärten und Schneiden eines Halbzeugs aus härtbarem Stahl
JP2011092946A (ja) 2009-10-27 2011-05-12 Aisin Takaoka Ltd 熱間プレス加工装置及び熱間プレス加工方法
JP2011218436A (ja) * 2010-04-14 2011-11-04 Honda Motor Co Ltd 熱間プレス成形方法
DE102011116714B4 (de) * 2011-10-22 2022-12-22 Volkswagen Aktiengesellschaft Verfahren und Werkzeug zum Warmformen eines Blechmaterials
JP2014018801A (ja) * 2012-07-12 2014-02-03 Honda Motor Co Ltd 孔開け加工方法、孔を備えた構造体の製造方法および孔を備えた構造体
ES2870544T3 (es) * 2013-10-21 2021-10-27 Magna Int Inc Método para recortar una pieza conformada en caliente
CN105149428A (zh) * 2014-06-09 2015-12-16 Gnssolitech株式会社 毛坯成型和切边用的热冲压加工方法以及模具装置
JP6886769B2 (ja) 2015-05-25 2021-06-16 株式会社三共 遊技機
CN205074407U (zh) * 2015-06-24 2016-03-09 武汉理工大学 一种局部变强度热冲压件的成形模具

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140096583A1 (en) * 2012-10-05 2014-04-10 Hyundai Motor Company Device and method for hot stamping

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11267035B2 (en) * 2018-06-23 2022-03-08 Dongguan University Of Technology Integrated flattening, cutting, and collecting assembly capable of integrity maintenance
US20200038976A1 (en) * 2018-08-02 2020-02-06 Toyota Jidosha Kabushiki Kaisha Splitting apparatus and splitting method
US10946460B2 (en) * 2018-08-02 2021-03-16 Toyota Jidosha Kabushiki Kaisha Splitting apparatus and splitting method

Also Published As

Publication number Publication date
CN109843463A (zh) 2019-06-04
MX2019004639A (es) 2019-09-18
EP3520917A1 (en) 2019-08-07
JPWO2018083814A1 (ja) 2019-09-19
WO2018083814A1 (ja) 2018-05-11

Similar Documents

Publication Publication Date Title
US20190247906A1 (en) Hot press forming apparatus and hot press forming method
EP3060687B1 (en) Method for trimming a hot formed part
US8261591B2 (en) Apparatus for hot-forming, press-quenching, and cutting semifinished hardenable-steel workpiece
US9242287B2 (en) Method and tool for hot forming a metal workpiece
KR20180095757A (ko) 핫스탬핑 부품의 제조방법
US20160281185A1 (en) Producing a partially hardened formed part
US9132464B2 (en) Method for hot stamping metal
US9708678B2 (en) Method for producing a formed and at least regionally hardened sheet metal component
JP5386991B2 (ja) せん断加工成形方法
KR102340442B1 (ko) 프레스 성형품의 제조 방법
US20190291160A1 (en) Method for machining a sheet-metal profile
JPWO2020145063A1 (ja) 金属板のせん断加工方法及びプレス部品の製造方法
JP2010000536A (ja) ホットプレス用成形金型装置及びホットプレス成形方法
JP7176549B2 (ja) 金属板のせん断加工方法、プレス部品の製造方法、金属板、及び金属板のせん断金型
JP6977913B1 (ja) プレス部品の製造方法、及びブランク材の製造方法
CN107206452B (zh) 用于在工件上产生套环的方法和装置
JP2019111567A (ja) プレス成形品の製造方法
JP7276428B2 (ja) 冷間プレス用の鋼板の製造方法、及びプレス部品の製造方法
TWI587939B (zh) 預切割高強度鋼材的方法
RU2743047C1 (ru) Способ оптимизированного производства компонента с по меньшей мере одним формованным вспомогательным элементом
JP2006224123A (ja) 鋼板打ち抜き方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: UNIPRES CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SERIZAWA, TSUTOMU;OHBUCHI, KOJI;KIKAWA, TAMIYA;REEL/FRAME:049002/0755

Effective date: 20190423

STPP Information on status: patent application and granting procedure in general

Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION

STPP Information on status: patent application and granting procedure in general

Free format text: NON FINAL ACTION MAILED

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION