公开(公告)号：US20160208355A1

公开(公告)日：2016-07-21

申请号：US14914392

申请日：2014-07-16

Applicant: JFE STEEL CORPORATION

Inventor： Tatsuya Nakagaito ,  Yuichi Tokita ,  Toru Minote ,  Yoshikiyo Tamai

IPC: C21D9/00 ,  C21D6/00 ,  C21D1/60 ,  C22C38/60 ,  C23C2/06 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/02 ,  C22C38/32

CPC classification number: C21D9/0068 ,  B32B15/013 ,  C21D1/18 ,  C21D1/60 ,  C21D1/673 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/0205 ,  C21D8/0221 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C22C18/00 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C22C38/60 ,  C23C2/06 ,  C23C2/28 ,  C23C2/405

Abstract: A method of manufacturing a hot press formed part by hot pressing a coated steel sheet that is obtained by forming a Zn-based coating layer on a surface of a steel sheet includes: heating the coated steel sheet to a temperature range of 750° C. or more and 1000° C. or less; cooling a surface of the coated steel sheet; and hot press forming the coated steel sheet under a condition that a surface temperature of the coated steel sheet is 400° C. or less and an average temperature of the coated steel sheet is 500° C. or more or a temperature of a center position of the coated steel sheet in a thickness direction is 530° C. or more.

Abstract translation: 通过在钢板的表面上形成Zn基涂层而获得的涂覆钢板热压制造热压成形部件的方法包括：将涂覆的钢板加热到750℃的温度范围 以上且1000℃以下; 冷却涂层钢板的表面; 并且在涂覆钢板的表面温度为400℃以下，镀覆钢板的平均温度为500℃以上或中心位置的温度的条件下，形成涂布钢板的热压机 的涂层钢板的厚度方向为530℃以上。

公开(公告)号：US20150064052A1

公开(公告)日：2015-03-05

申请号：US14382995

申请日：2013-03-04

Applicant: JFE Steel Corporation

Inventor： Yuichi Tokita ,  Yoshikiyo Tamai ,  Toru Minote ,  Takeshi Fujita

IPC: B21K7/12 ,  C22C38/50 ,  C22C38/44 ,  C22C38/28 ,  C22C38/24 ,  C22C38/20 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B21J1/06 ,  C22C38/60

CPC classification number: B21K7/12 ,  B21D22/208 ,  B21D53/88 ,  B21J1/06 ,  C21D1/673 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/007 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/44 ,  C22C38/50 ,  C22C38/60 ,  C23C2/06 ,  C23C2/28

Abstract: A method of forming a steel sheet having a tensile strength of 440 MPa or more into a press-formed part including a flange portion and other portions by press forming includes: heating the steel sheet to a temperature of 400° C. to 700° C.; and press-forming the heated steel sheet using draw forming to obtain a press-formed part, with the steel sheet being held at a press bottom dead point in the die for one second to five seconds. Geometric changes such as springback that occur in a panel can thus be suppressed, the dimensional accuracy of the panel can be enhanced, and the desired mechanical properties can easily be obtained in the press-formed part.

Abstract translation: 通过冲压成形将具有440MPa以上拉伸强度的钢板形成在具有凸缘部分的其它部分的压制成型部分中的方法包括：将钢板加热到400℃至700℃的温度 。 使用拉伸成型对加热后的钢板进行压制成形，得到压制成形部，将钢板保持在模具的下压点死点1秒〜5秒。 因此可以抑制在面板中发生的回弹的几何变化，可以提高面板的尺寸精度，并且可以容易地在压制成形部中获得期望的机械性能。

公开(公告)号：US20150039247A1

公开(公告)日：2015-02-05

申请号：US14386538

申请日：2013-03-04

Applicant: JFE Steel Corporation

Inventor： Toru Minote ,  Yuichi Tokita ,  Yoshikiyo Tamai ,  Masaki Urabe ,  Takeshi Fujita

IPC: G01B5/20 ,  G01N25/72 ,  G01N19/08

CPC classification number: G01B5/20 ,  B21D22/208 ,  B21D53/88 ,  G01N19/08 ,  G01N25/72 ,  G06F17/5018 ,  G06F17/5095 ,  G06F2217/41 ,  G06F2217/42 ,  G06F2217/44 ,  G06F2217/46 ,  Y02T90/50

Abstract: A press-forming analysis method includes a step of analyzing press forming including setting an initial temperature distribution to a heated press-forming metallic sheet, and acquiring shape information, a temperature distribution, a stress distribution, and a strain distribution before mold release, in which a temperature analysis and a structural analysis are coupled; a step of analyzing springback including conducting a springback analysis based on the shape information, the temperature distribution, the stress distribution, and the acquired strain distribution, and acquiring shape information, a temperature distribution, a stress distribution, and a strain distribution after springback; and a step of analyzing cooling stress including restraining particular nodes based on the shape information, the temperature distribution, the stress distribution, and the acquired strain distribution, and analyzing stress distributions during cooling and after the cooling by coupling a temperature analysis and a structural analysis.

Abstract translation: 压制成型分析方法包括对压制成型进行分析的步骤，包括将初始温度分布设定为加热的压制成型金属板，并且获取形状信息，温度分布，应力分布和脱模前的应变分布， 温度分析和结构分析耦合; 分析回弹的步骤，包括基于形状信息，温度分布，应力分布和获取的应变分布进行回弹分析，以及获得回弹后的形状信息，温度分布，应力分布和应变分布; 以及基于形状信息，温度分布，应力分布和获得的应变分布来分析冷却应力的步骤，包括抑制特定节点，以及通过耦合温度分析和结构分析来分析冷却期间和冷却后的应力分布 。

公开(公告)号：US10167530B2

公开(公告)日：2019-01-01

申请号：US14914392

申请日：2014-07-16

Applicant: JFE STEEL CORPORATION

Inventor： Tatsuya Nakagaito ,  Yuichi Tokita ,  Toru Minote ,  Yoshikiyo Tamai

IPC: C21D9/00 ,  C21D1/18 ,  C21D1/60 ,  C21D6/00 ,  C21D8/02 ,  B32B15/01 ,  C22C18/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/14 ,  C22C38/32 ,  C22C38/60 ,  C23C2/06 ,  C23C2/28 ,  C23C2/40 ,  C21D9/46 ,  C21D1/673

Abstract: A method of manufacturing a hot press formed part by hot pressing a coated steel sheet that is obtained by forming a Zn-based coating layer on a surface of a steel sheet includes: heating the coated steel sheet to a temperature range of 750° C. or more and 1000° C. or less; cooling a surface of the coated steel sheet; and hot press forming the coated steel sheet under a condition that a surface temperature of the coated steel sheet is 400° C. or less and an average temperature of the coated steel sheet is 500° C. or more or a temperature of a center position of the coated steel sheet in a thickness direction is 530° C. or more.

公开(公告)号：US10161892B2

公开(公告)日：2018-12-25

申请号：US14766682

申请日：2013-02-08

Applicant: JFE STEEL CORPORATION

Inventor： Toru Minote ,  Yuichi Tokita ,  Yoshikiyo Tamai ,  Takeshi Fujita

IPC: G01L1/00 ,  B21D22/02 ,  G01N25/00 ,  B21D22/20 ,  G01B21/20 ,  G06F17/50

Abstract: A method of analyzing press-forming of a press-forming material including analyzing press-forming, analyzing springback and analyzing a change in shape of the press-forming material. The analyzing press-forming may include setting an initial temperature distribution for the heated press-forming material and performing a press-forming analysis by combining temperature analysis and structural analysis to obtain shape information, temperature distribution, stress distribution, and strain distribution. The analyzing springback may occur with and without consideration of contact heat transfer between a press-forming tool and the press-forming material. The method may further include modifying the temperature distribution obtained in the analyzing springback and then re-analyzing the change in shape of the press-forming material. The analyzing the change in shape may be performed until a temperature distribution in the press-forming material is within the range of ±5° C.

公开(公告)号：US20170043386A1

公开(公告)日：2017-02-16

申请号：US15305552

申请日：2015-02-26

Applicant: JFE STEEL CORPORATION

Inventor： Tatsuya Nakagaito ,  Yuichi Tokita ,  Toru Minote ,  Yoshikiyo Tamai

IPC: B21D22/02 ,  B21D37/16

Abstract: In manufacturing a hot press forming part by hot pressing, using a tool of press forming, a coated steel sheet, the tool of press forming having a die, a blank holder, and a punch, edges of the coated steel sheet heated to a temperature range of Ac3 transformation temperature to 1000° C. are cooled with the edges squeezed between the die and the blank holder to a temperature of 550° C. or lower and 400° C. or higher at a cooling rate of 100° C./s or higher, press forming is performed so that the press forming is started when the edges reach a temperature of 550° C. or lower and 400° C. or higher, and after the press forming, a formed body is quenched with the formed body held at the press bottom dead center while being squeezed by the tool of press forming.

Abstract translation: 在通过热压制造热压成形部件时，使用压制成型工具，涂覆钢板，具有模具的冲压成型工具，坯料夹持器和冲头，将被加热钢板的边缘加热到温度 Ac3转变温度到1000℃的范围被冷却，在模具和坯料夹持器之间的边缘以100℃的冷却速度在550℃或更低和400℃或更高的温度下冷却。 s以上时，进行冲压成形，使得当边缘达到550℃以下且400℃以上的温度时开始冲压成形，并且在压制成型后，成形体被淬火 身体保持在压床下死点，同时被压制成型工具挤压。

公开(公告)号：US20150078956A1

公开(公告)日：2015-03-19

申请号：US14383253

申请日：2013-03-04

Applicant: JFE Steel Corporation

Inventor： Yoshikiyo Tamai ,  Yuichi Tokita ,  Toru Minote ,  Takeshi Fujita

IPC: B21D53/88 ,  B21D22/20 ,  C22C38/60 ,  C22C38/50 ,  C22C38/44 ,  C22C38/28 ,  C22C38/24 ,  C22C38/20 ,  C22C38/14 ,  C22C38/12 ,  C22C38/10 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B62D29/00 ,  B21D22/21

CPC classification number: B21D53/88 ,  B21D22/208 ,  B21D22/21 ,  B62D29/007 ,  C21D1/673 ,  C21D8/0226 ,  C21D9/46 ,  C21D2211/004 ,  C21D2211/005 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/007 ,  C22C38/008 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/105 ,  C22C38/12 ,  C22C38/14 ,  C22C38/20 ,  C22C38/24 ,  C22C38/28 ,  C22C38/44 ,  C22C38/50 ,  C22C38/60

Abstract: A method forms a steel sheet having a tensile strength of 440 MPa or more into a press-formed part including a flange portion and other portions by press forming. The method includes: heating the steel sheet to a temperature of 400° C. to 700° C.; and press-forming the heated steel sheet by crash forming to obtain a press-formed part such that an average temperature difference among a flange portion and other portions of the press-formed part immediately after the formation is kept within 100° C. Geometric changes such as springback that occur in a panel can thus be suppressed, dimensional accuracy of the panel can be enhanced accordingly, and the desired mechanical properties can easily be obtained in the press-formed part.

Abstract translation: 一种方法通过压制成型将具有440MPa或更大的拉伸强度的钢板形成为包括凸缘部分和其它部分的压制成形部件。 该方法包括：将钢板加热至400℃至700℃的温度; 并通过碰撞成型对加热后的钢板进行压制成形，得到压制成形部，使凸缘部与刚成形后的压制成形部的其它部分的平均温度差保持在100℃以内。几何变化 因此能够抑制板等发生的回弹，因此可以相应地提高面板的尺寸精度，并且可以容易地在压制成形部中获得期望的机械性能。