WO2019185059A1 - Processus de soudage pour ensemble de différentiel - Google Patents
Processus de soudage pour ensemble de différentiel Download PDFInfo
- Publication number
- WO2019185059A1 WO2019185059A1 PCT/CN2019/080629 CN2019080629W WO2019185059A1 WO 2019185059 A1 WO2019185059 A1 WO 2019185059A1 CN 2019080629 W CN2019080629 W CN 2019080629W WO 2019185059 A1 WO2019185059 A1 WO 2019185059A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- differential
- welding
- weld
- differential gear
- gear
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/22—Spot welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/211—Bonding by welding with interposition of special material to facilitate connection of the parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/242—Fillet welding, i.e. involving a weld of substantially triangular cross section joining two parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
- B23K26/24—Seam welding
- B23K26/28—Seam welding of curved planar seams
- B23K26/282—Seam welding of curved planar seams of tube sections
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/32—Bonding taking account of the properties of the material involved
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/12—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to investigating the properties, e.g. the weldability, of materials
- B23K31/125—Weld quality monitoring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/06—Cast-iron alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
Definitions
- the invention belongs to the technical field of automobile parts manufacturing, and specifically discloses a welding process of a differential assembly.
- the differential assembly is an important and indispensable component in the car to realize turning and changing of the car, and is mainly composed of a differential case and a differential gear.
- the differential housings on automobiles are mostly ductile iron (such as QT500 and QT600), and the differential gears are mostly low carbon steel (such as 20CrMoH, 20MnCr5).
- the differential gear and the differential housing are The connection is made by connecting the differential gear to the differential housing with bolts or rivets.
- Conventional screw or rivet-connected differential assemblies have the following disadvantages:
- the differential housing and the differential gear require complicated machining processes such as drilling, tapping and assembly, which are difficult to process and costly.
- the conventional differential assembly is to assemble the differential gear after finishing (grinding) to the differential housing.
- the accuracy of the differential gear is reduced due to the error of the installation, which affects the use of the automobile.
- the object of the present invention is to provide a welding process for a differential assembly to solve the conventional differential assembly, which is difficult to process, high in cost, low in precision, and difficult to be lightweight.
- the basic solution of the present invention is: a welding process of a differential assembly, comprising the following steps:
- a 0.6-1.5 mm iron-nickel alloy welding wire is filled into the gap of the contact surface of the differential case and the differential gear by a wire filling mechanism, and the differential case is spot-welded by a laser. Welding with the contact surface of the differential gear;
- the differential assembly is fixedly connected by the differential gear of the low carbon steel and the differential housing of the ductile iron, which reduces the drilling and threading of the differential housing and the differential gear.
- the processing, as well as the assembly of the differential housing and the differential gear, further avoids the accuracy of the differential assembly due to machining and assembly, reduces production costs, and improves production efficiency and machining accuracy.
- the differential assembly produced by welding reduces the bolt structure, which makes the differential assembly produced more compact and lighter in overall quality, and can be reduced according to the structural needs of the electric vehicle.
- the size of the differential assembly allows the differential assembly to be used in a wide range.
- the structure of the differential assembly produced by welding is relatively simple, easy to produce, and the joint strength of the casing and the gear is improved by welding, so that the differential assembly produced is more durable.
- the differential housing of the different materials and the differential gear can be welded together, so that the welding strength of the differential housing and the differential gear can meet the required requirements.
- the process is simple in operation, and the differential assembly produced can be simple in structure, low in processing cost, high in precision, and light in total.
- step (4) after filling the welding wire, the contact faces of the differential case and the differential gear are evenly divided into 3-8 points for spot welding. Spot welding is more effective in preventing relative displacement of the differential housing and the differential gear during welding.
- the differential case and the differential gear are clamped by a clamp, and a laser beam is used to wrap around the weld to dissolve the iron-nickel alloy wire.
- the differential gear and the differential housing are welded and fixed. The welding process can be made more fast and stable, so that the differential gear and the differential housing have better welding quality and higher processing efficiency.
- Preferred Embodiment 3 As a preferred embodiment 2, in the steps (5) and (6), the position of the welding is located at an axial contact surface of the differential gear and the differential case. When the differential gear and the differential housing are subjected to relative forces, the axial contact faces of the two are the points of force, where welding can make the differential gear and the differential housing more durable.
- the differential housing and the differential gear weld are located at the end of the stepped shaft bore having a small diameter.
- the differential housing and the differential gear are closely attached, which makes it easier to weld and also makes the connection between the two more secure.
- Preferred Embodiment 5 As a preferred embodiment 4, the weld depth of the differential housing and the differential gear weld is 5 ⁇ 0.5 mm. The connection strength of the differential case and the differential gear is further satisfied.
- Preferred Embodiment 6 As a preferred embodiment 2, in the steps (5) and (6), the position of the welding is located at a radial contact surface of the differential gear and the differential case.
- the welding port can be made facing outward to facilitate the welding operation; and when the differential assembly is in use, the differential gear and the differential housing are relatively stressed, and the radial position of the contact surface is welded, which can effectively offset the relative Forced to make the differential assembly more durable.
- the welded portion of the gear and the housing has a weld depth of 6 ⁇ 0.5 mm. It further ensures that the welded connection between the housing and the gear is relatively firm.
- FIG. 1 is a schematic structural view of a differential assembly processed by the welding process of Embodiment 1;
- Figure 2 is an enlarged view of the structure at A in Figure 1;
- FIG. 3 is a schematic structural view of a differential assembly processed by the welding process of Embodiment 5;
- Figure 4 is an enlarged view of the structure at B in Figure 1.
- a welding process for a differential assembly includes the following steps:
- the differential gear 1 and the differential case 2 are fixed by a jig, and a 1 mm iron-nickel alloy welding wire is filled into the axial contact surface of the differential case 2 and the differential gear 1 by a wire filling mechanism.
- the contact faces of the differential case 2 and the differential gear 1 are evenly divided into 4 points for spot welding; the differential case 2 and the differential gear 1 are welded at the small diameter end of the stepped shaft hole. unit;
- the machine tool is used to make the laser beam for welding go around the weld 3 of the differential assembly, and the iron-nickel alloy welding wire is completely dissolved at a high temperature, and the differential case is assembled. 2 and all the axial contact faces of the differential gear 1 are connected together, the effective weld 3 depth at the weld is 5 ⁇ 0.5 mm;
- the present embodiment is different from the first embodiment in that, in the step (4), a 0.6 mm iron-nickel alloy welding wire is filled into the axial contact surface of the differential case 2 and the differential gear 1 by a wire filling mechanism. In the slit, the contact faces of the differential case 2 and the differential gear 1 are evenly divided into three points for spot welding.
- the three points of the contact surface of the differential case 2 and the differential gear 1 are spot-welded, so that both are good.
- the present embodiment is different from the first embodiment in that, in the step (4), a 1.3 mm iron-nickel alloy welding wire is filled into the axial contact surface of the differential case 2 and the differential gear 1 by a wire filling mechanism. In the slit, the contact faces of the differential case 2 and the differential gear 1 are evenly divided into 6 points for spot welding.
- Spot welding the 6 points of the contact surface of the differential case 2 and the differential gear 1 can be applied to a plurality of differential assemblies, and a 1.3 mm iron-nickel alloy welding wire can be used to make the welding process more Firm.
- the present embodiment is different from the first embodiment in that, in the step (4), a 1.5 mm iron-nickel alloy welding wire is filled into the axial contact surface of the differential case 2 and the differential gear 1 by a wire filling mechanism. In the slit, the contact faces of the differential case 2 and the differential gear 1 are evenly divided into 8 points for spot welding.
- the present embodiment is different from Embodiment 1 in that, in the steps (5) and (6), the position of the welding is located at the radial contact surface of the differential gear 1 and the differential case 2;
- the weld seam 3 at the weld of the casing has a depth of 6 ⁇ 0.5 mm.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Quality & Reliability (AREA)
- Laser Beam Processing (AREA)
- Retarders (AREA)
Abstract
La présente invention concerne le domaine technique de la fabrication d'accessoires d'automobile. L'invention porte sur un procédé de soudage pour un ensemble de différentiel, lequel procédé comprend les étapes suivantes, consistant à : (1) préparer un boîtier de différentiel et un engrenage différentiel correspondant l'un à l'autre ; (2) effectuer un nettoyage au laser ; (3) effectuer un ajustement par pression ; (4) effectuer un remplissage de fil de soudage et un soudage par points au laser ; (5) effectuer un soudage circulaire ; (6) nettoyer un cordon de soudure ; (7) détecter des défauts par ultrasons ; et (8) meuler l'engrenage. Par rapport à l'état antérieur de la technique, le procédé est de fonctionnement simple, de telle sorte que l'ensemble de différentiel produit par le procédé est de structure simple, de coûts de traitement réduits, de précision élevée et de poids plus léger.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112019000066.7T DE112019000066T5 (de) | 2018-03-30 | 2019-03-29 | Schweißverfahren für eine Differentialbaugruppe |
JP2020519176A JP2020523201A (ja) | 2018-03-30 | 2019-03-29 | 差動アセンブリの溶接プロセス |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810295642.7 | 2018-03-30 | ||
CN201810295642.7A CN108500576A (zh) | 2018-03-30 | 2018-03-30 | 一种差速器总成的焊接工艺 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019185059A1 true WO2019185059A1 (fr) | 2019-10-03 |
Family
ID=63380262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2019/080629 WO2019185059A1 (fr) | 2018-03-30 | 2019-03-29 | Processus de soudage pour ensemble de différentiel |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2020523201A (fr) |
CN (1) | CN108500576A (fr) |
DE (1) | DE112019000066T5 (fr) |
WO (1) | WO2019185059A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110939710A (zh) * | 2019-12-30 | 2020-03-31 | 四川众友机械有限责任公司 | 一种差速器半轴齿轮的轴孔密封结构及加工工艺 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108500576A (zh) * | 2018-03-30 | 2018-09-07 | 重庆联豪科技有限公司 | 一种差速器总成的焊接工艺 |
US11213917B2 (en) * | 2018-11-13 | 2022-01-04 | GM Global Technology Operations LLC | Fusion welding of ferrous alloy component parts using low carbon steel band |
CN112570918A (zh) * | 2020-12-04 | 2021-03-30 | 南京劲拓海洋工程装备有限公司 | 一种钻井平台齿轮和齿轴焊接方法 |
CN113732494A (zh) * | 2021-08-31 | 2021-12-03 | 蜂巢传动科技河北有限公司 | 焊接方法 |
CN114770005B (zh) * | 2022-05-17 | 2023-07-25 | 安徽双骏智能科技有限公司 | 一种差速器壳体的焊接平台及其使用方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2830798Y (zh) * | 2005-09-30 | 2006-10-25 | 中信重型机械公司 | 大型行星齿轮减速器用焊接式行星转架轴 |
US20090013533A1 (en) * | 2007-07-10 | 2009-01-15 | Isken Ii Dennis W | Differential mechanism assembly |
CN105665916A (zh) * | 2016-04-07 | 2016-06-15 | 合肥美桥汽车传动及底盘系统有限公司 | 一种后驱动桥壳总成的焊接方法 |
CN106994543A (zh) * | 2017-04-27 | 2017-08-01 | 山东五征集团有限公司 | 一种差速器壳与大齿圈的连接结构及连接方法 |
CN107138927A (zh) * | 2017-07-05 | 2017-09-08 | 泰州市东方传动技术有限公司 | 一种行星架轴焊接总成焊接加工工艺 |
CN108500576A (zh) * | 2018-03-30 | 2018-09-07 | 重庆联豪科技有限公司 | 一种差速器总成的焊接工艺 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5154044A (ja) * | 1974-11-07 | 1976-05-12 | Sumitomo Metal Ind | Kokannoyosetsuho |
JPS60121093A (ja) * | 1983-12-06 | 1985-06-28 | Mitsubishi Heavy Ind Ltd | レ−ザ溶接方法 |
JPH0952183A (ja) * | 1995-08-14 | 1997-02-25 | Mitsubishi Heavy Ind Ltd | 電子ビーム溶接方法 |
DE10013430A1 (de) * | 2000-03-17 | 2001-09-27 | Daimler Chrysler Ag | Verfahren zum Verbinden von Bauteilen aus einsatzgehärtetem Stahl untereinander und mit Bauteilen aus Gußeisen |
JP4839941B2 (ja) * | 2006-04-18 | 2011-12-21 | トヨタ自動車株式会社 | 溶接部品の製造方法 |
JP4858513B2 (ja) * | 2008-08-22 | 2012-01-18 | トヨタ自動車株式会社 | 差動装置の接合方法、及び接合補助具 |
WO2011158330A1 (fr) * | 2010-06-15 | 2011-12-22 | トヨタ自動車株式会社 | Structure pour le soudage d'une couronne et d'un boîtier de différentiel |
JP5687577B2 (ja) * | 2011-07-12 | 2015-03-18 | トヨタ自動車株式会社 | 溶接構造、及び溶接方法 |
JP6187280B2 (ja) * | 2014-01-22 | 2017-08-30 | アイシン・エィ・ダブリュ株式会社 | 差動歯車装置及びその製造方法 |
CN103831591B (zh) * | 2014-03-07 | 2017-01-04 | 董武祥 | 镁合金薄壁无缝管车架的焊接方法 |
JP6327453B2 (ja) * | 2014-04-22 | 2018-05-23 | パナソニックIpマネジメント株式会社 | レーザ溶接方法及び装置 |
-
2018
- 2018-03-30 CN CN201810295642.7A patent/CN108500576A/zh active Pending
-
2019
- 2019-03-29 JP JP2020519176A patent/JP2020523201A/ja active Pending
- 2019-03-29 DE DE112019000066.7T patent/DE112019000066T5/de not_active Withdrawn
- 2019-03-29 WO PCT/CN2019/080629 patent/WO2019185059A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2830798Y (zh) * | 2005-09-30 | 2006-10-25 | 中信重型机械公司 | 大型行星齿轮减速器用焊接式行星转架轴 |
US20090013533A1 (en) * | 2007-07-10 | 2009-01-15 | Isken Ii Dennis W | Differential mechanism assembly |
CN105665916A (zh) * | 2016-04-07 | 2016-06-15 | 合肥美桥汽车传动及底盘系统有限公司 | 一种后驱动桥壳总成的焊接方法 |
CN106994543A (zh) * | 2017-04-27 | 2017-08-01 | 山东五征集团有限公司 | 一种差速器壳与大齿圈的连接结构及连接方法 |
CN107138927A (zh) * | 2017-07-05 | 2017-09-08 | 泰州市东方传动技术有限公司 | 一种行星架轴焊接总成焊接加工工艺 |
CN108500576A (zh) * | 2018-03-30 | 2018-09-07 | 重庆联豪科技有限公司 | 一种差速器总成的焊接工艺 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110939710A (zh) * | 2019-12-30 | 2020-03-31 | 四川众友机械有限责任公司 | 一种差速器半轴齿轮的轴孔密封结构及加工工艺 |
Also Published As
Publication number | Publication date |
---|---|
DE112019000066T5 (de) | 2020-02-27 |
JP2020523201A (ja) | 2020-08-06 |
CN108500576A (zh) | 2018-09-07 |
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