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EP0133704A2 - Structure d'assemblage de deux pièces - Google Patents

Structure d'assemblage de deux pièces Download PDF

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Publication number
EP0133704A2
EP0133704A2 EP84109483A EP84109483A EP0133704A2 EP 0133704 A2 EP0133704 A2 EP 0133704A2 EP 84109483 A EP84109483 A EP 84109483A EP 84109483 A EP84109483 A EP 84109483A EP 0133704 A2 EP0133704 A2 EP 0133704A2
Authority
EP
European Patent Office
Prior art keywords
members
recess
circumferential surface
cylindrical member
grooved
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.)
Withdrawn
Application number
EP84109483A
Other languages
German (de)
English (en)
Other versions
EP0133704A3 (fr
Inventor
Kazuo Sawahata
Masaharu Oku
Kazuhiro Tsuruoka
Hisanobu Kanamaru
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Publication of EP0133704A2 publication Critical patent/EP0133704A2/fr
Publication of EP0133704A3 publication Critical patent/EP0133704A3/fr
Withdrawn legal-status Critical Current

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in

Definitions

  • This invention relates to a structure of connecting two members, and more particularly to a structure of connecting two members which is suitable for use in connecting a preferably cylindrical member and a preferably surface-contact member to each other with a butt joint.
  • Butting a cylindrical member against a flat member and then plastically deforming some metal interposed therebetween to connect these members together is also known, it is disclosed in Japanese Patent Laid-open No. 150,761/1979.
  • an annular groove of a width greater than the wall thickness of the cylindrical member is formed in the butting surface of the flat member, and annular connection grooves are formed in the inner circumferential surface of the groove in the flat member and the outer circumferential surface of the joint portion of the cylindrical member.
  • a metal piece which has a deformation resistance lower than those of the materials of the two members being connected together is inserted into the connection grooves, and local deformation pressure is applied thereto in the vertical direction to plastically deform the metal piece and thereby combine the two members.
  • This kind of method increases the strength with which the members are sealed together, so that a comparatively good effect can be obtained easily when attaching a base cover, etc.
  • the use of a support block holding the outer circumferential surface of the base cover is necessary, but this is inconvenient in that it reduces productivity, so this structure is not suitable for connecting a cylindrical .part perpendicularly to another member.
  • An object of the present invention is to provide a structure. of connecting two members which enables the economy of materials to be used and the improvement of the gastightness between members.
  • Another object of-the present invention is to provide a structure of connecting two members which enables the easy and reliable connection of a cylindrical member perpendicularly to a flat or cylindrical member.
  • the present invention is characterized in that a first member is fitted into a recess formed in a surface of a second member which is placed opposite one end of said first member, at least one annular groove is formed on a surface of either of said first member or said second member, and a portion of said first member or said second member is plastically deformed into said at least one annular groove by pressing locally in the axial direction the connecting portion of said first and second members, whereby said first and second members are connected together by the binding force generated in that the section of said one of said members surrounding said grooved portion.
  • Figs. 1 and 2 show an embodiment of the structure of connecting two members according to the present invention, by which a bottomed cylindrical part and a flat part are connected together with a butt joint.
  • a first cylindrical part 1 is provided with a bottom 1A and is formed in the shape of a cup by, for example, cold pressing an iron blank.
  • the first member 1 is provided with at least one continuous groove 1 B annularly around the outer circumferential surface of an end portion thereof.
  • the bottom of the groove is provided with a plurality of continuous bumps and indentations 1C and the grooves are preferably formed to be positioned in the portion of the outer circumferential surface of the part 1 which is between the upper and lower surfaces of the bottom 1A thereof.
  • the bumps and indentations 1C are formed by making annular grooves (of a W-shaped cross section) of an angle of incidence of about 30° in that portion of the first member 1, and then knurling the crest of the ridge, defined by the grooves.
  • a second member 2 is made of an aluminum material (with a deformation resistance of 8-10 kg/mm 2 ) or a copper material, for example, the deformation resistance of which is less than that of the first member 1 (which has a deformation resistance of 40-60 kg/mm 2 ).
  • a recess 2A of a diameter d 1 (with a fitting tolerance of 1/100-5/100 mm), substantially equal to the outer diameter D 1 of the first part 1, is provided in an end surface of the second member 2.
  • the two members of this structure are connected together in the following manner.
  • the bottom 1A of the first member 1 is first fitted into the recess 2A in the second member 2, as shown in Fig. 2(A).
  • the annular grooves 1B face an inner circumferential surface 2B of the recess 2A, so that the outer circumferential portion of the joint portion of the first member 1 is surrounded and held by the second member 2.
  • a cylindrical metal mold 3 which is moved down by a press (not shown), is then slid down over the outer circumferential surface of the first part 1 so that a male tooth 3A thereof presses into the upper surface of the second member 2 in the vicinity of the inner circumference thereof, as shown in Fig. 2(B). Consequently, the second member 2, made of a softer material, flows plastically into the spaces formed by the grooves 1B.
  • the bumps provided on the harder member such as the first member eat into the softer member such as the second member, so that the softer member is deformed plastically and locally by the bumps, and is connected with the harder member with a large binding force, because of the elastic stresses generated in the softer member.
  • the metal mold 3 is then removed to complete the operation.
  • the male tooth 3A is so formed that the inner surface thereof extends linearly along the outer circumferential surface of the first member, with the outer surface thereof inclined at an angle 6 of about 6° with respect to the direction in which the metal mold 3 is slid along the first member.
  • the outer surface of the male tooth 3A is inclined at the angle 6 to enable the easy removal of the metal mold 3, but this is unnecessary if the male tooth is narrow.
  • each portion is formed so as to meet following equations:
  • the depth "h" over which the second member is pressed varies with the pressure, but it should preferably be pressed as far as a position close to the inner edge Z of the grooves 1B, and it should not be pressed beyond the ridges.
  • first and second members are connected in following steps:
  • the end portion of a first cylindrical part 1 can be easily fitted perpendicularly into a recess 2A in a second part 2 without the use of a special support block.
  • This connecting structure is especially useful for connecting members that do not pass through each other, and enables a highly-accurate hermetic connection of such members.
  • the joint portion of the softer member flows into spaces between projections provided on the harder member, and is deformed plastically and locally thereby. Consequently, elastic stresses are generated in the deformed softer member, so that the softer member is connected with the harder member with a large binding force, and the connected product thus obtained has an extremely good resistance to rotary torque and pull-out forces. Since this structure is obtained at room temperature from beginning to end, the members being connected are not influenced thermally unlike welded or soldered members. This means that the connected members can remain in a stably-connected state semipermanently.
  • an iron material is quoted as an example of a harder material, and aluminum or copper as an example of a softer material, but the material of the member which is most pressed can be any softer material.
  • the first member could be hardened in advance.
  • the first member could be formed as a cylinder by the cold pressing. In such a case, the material is hardened naturally, so that that member need not be specially hardened.
  • Fig. 3 is a partially-sectioned view of a principal portion of a cylindrical member which is to be connected by another embodiment of the method accorcing to the present invention.
  • the cylindrical member is substantially in the shape of a cup in the same way as the cylindrical member of the previous embodiment, but of a plurality of annular grooves 11B are provided in the portion of the outer circumferential surface thereof which corresponds to the depth of a bottom 11A thereof.
  • the connection structure applied to this member does not differ in any way from that applied to the cylindrical member of the previous embodiment, but it is effective when applied to a member which requires a higher resistance to pull-out forces, this member is connected to another in the rotational direction by only a frictional engagement.
  • Fig. 4 is a partially-sectioned view of members connected by a third embodiment of the structure according to the present invention.
  • the characteristics of this embodiment reside in that a collar 12B is formed around the outer circumferential surface of the bottom of a cylindrical member, and an indented portion 32C is formed in an inner circumferential surface 32B of a recess 32A in a second member 32 which faces the collar 12B.
  • the collar 12B is fitted into the recess 32A in the second member 32 and is then pressed axially by a metal mold, so that the material of the collar flows plastically and locally into the indented portion 32C, connecting the two member together firmly.
  • the joint portion of the first member 12 must be made of a material that is softer than the material of the joint portion of the second member 32, but the binding force of this material is in no way less than that of the softer members used in the previous embodiments.
  • Fig. 5 illustrates the structure according to the present invention when applied to a crankshaft of an internal- combustion engine, such as the engine of a motorcycle.
  • a solid shaft 15 provided with straight splines 15A and an end thread 15B is attached to one surface of an iron flange 34 so that the shaft 15 extends at right angles to the surface of the flange 34.
  • Another solid shaft 16 is attached to the other surface of the flange 34 in a stageered manner with respect to the shaft 15.
  • the connection structure applied to these members is exactly the same as that used in the previous embodiments, but the solid shafts 15, 16 attached to the iron flange 34 are of hardened steel.
  • complexed parts such as crack shaft are separated into a plurality of simple member and then each member is plastically deformed each other with a butt joint, whereby productivity is improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Connection Of Plates (AREA)
EP84109483A 1983-08-10 1984-08-09 Structure d'assemblage de deux pièces Withdrawn EP0133704A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP144960/83 1983-08-10
JP58144960A JPS6037226A (ja) 1983-08-10 1983-08-10 二部材の結合方法

Publications (2)

Publication Number Publication Date
EP0133704A2 true EP0133704A2 (fr) 1985-03-06
EP0133704A3 EP0133704A3 (fr) 1985-08-14

Family

ID=15374194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84109483A Withdrawn EP0133704A3 (fr) 1983-08-10 1984-08-09 Structure d'assemblage de deux pièces

Country Status (4)

Country Link
EP (1) EP0133704A3 (fr)
JP (1) JPS6037226A (fr)
KR (1) KR850001839A (fr)
AU (1) AU3179584A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606088A1 (fr) * 1986-10-29 1988-05-06 Hitachi Ltd Injecteur electromagnetique de carburant et procede pour fabriquer un tel injecteur
GB2234460A (en) * 1989-07-19 1991-02-06 N Proizv Ob T I Oboru Sborochn Assembly of tip for flexible hose

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900004783B1 (ko) * 1987-07-01 1990-07-05 가와사끼 쥬고교 주식회사 이종재료의 중합체 및 그 제조방법
JPH0685950B2 (ja) * 1989-05-30 1994-11-02 堀江金属工業株式会社 塑性加工を利用した接合方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832130A (en) * 1953-10-16 1958-04-29 Harvey Machine Co Inc Method of securing an end piece to a tube
DE2244945A1 (de) * 1972-09-13 1974-03-21 Siemens Ag Verfahren zum mechanischen verbinden von buchsenartigen teilen mit platineartigen teilen
DE2505973A1 (de) * 1975-02-13 1976-08-26 Interatom Dichte verbindung von rohrleitungen mit einem flansch an vakuumanlagen
DE2607334A1 (de) * 1976-02-23 1977-08-25 Goetz Metallbau Gmbh Verfahren zur befestigung von verankerungsbolzen an metall-fassadenplatten bzw. befestigungsvorrichtung fuer metall-fassadenplatten
FR2388636A1 (fr) * 1977-04-26 1978-11-24 Guidotti Dante Procede de fixation d'une piece cylindrique a une plaque metallique, et produits industriels nouveaux obtenus par ce procede

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5310552A (en) * 1976-07-16 1978-01-31 Aisin Seiki Co Ltd Rotary aerating apparatus
SE425224B (sv) * 1977-11-29 1982-09-13 Flygt Ab Sett att forbinda tva ringformiga element
CH630148A5 (en) * 1978-08-10 1982-05-28 Bbc Brown Boveri & Cie Method of connecting structural elements
JPS5535214A (en) * 1978-09-04 1980-03-12 Asahi Chem Ind Co Ltd Method and device for film-thickness measurement making use of infrared-ray interference
JPS57142739A (en) * 1981-02-26 1982-09-03 Nippon Light Metal Co Ltd Manufacture of boss of roller
IT1136644B (it) * 1981-06-03 1986-09-03 Giorgio Fusco Elemento di serra

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2832130A (en) * 1953-10-16 1958-04-29 Harvey Machine Co Inc Method of securing an end piece to a tube
DE2244945A1 (de) * 1972-09-13 1974-03-21 Siemens Ag Verfahren zum mechanischen verbinden von buchsenartigen teilen mit platineartigen teilen
DE2505973A1 (de) * 1975-02-13 1976-08-26 Interatom Dichte verbindung von rohrleitungen mit einem flansch an vakuumanlagen
DE2607334A1 (de) * 1976-02-23 1977-08-25 Goetz Metallbau Gmbh Verfahren zur befestigung von verankerungsbolzen an metall-fassadenplatten bzw. befestigungsvorrichtung fuer metall-fassadenplatten
FR2388636A1 (fr) * 1977-04-26 1978-11-24 Guidotti Dante Procede de fixation d'une piece cylindrique a une plaque metallique, et produits industriels nouveaux obtenus par ce procede

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606088A1 (fr) * 1986-10-29 1988-05-06 Hitachi Ltd Injecteur electromagnetique de carburant et procede pour fabriquer un tel injecteur
GB2198289A (en) * 1986-10-29 1988-06-08 Hitachi Ltd Electromagnetic fuel injector
GB2198289B (en) * 1986-10-29 1990-07-18 Hitachi Ltd Electromagnetic fuel injector and method of producing the same
US5040731A (en) * 1986-10-29 1991-08-20 Hitachi, Ltd. Electromagnetic fuel injection and method of producing the same
GB2234460A (en) * 1989-07-19 1991-02-06 N Proizv Ob T I Oboru Sborochn Assembly of tip for flexible hose

Also Published As

Publication number Publication date
EP0133704A3 (fr) 1985-08-14
JPS6037226A (ja) 1985-02-26
KR850001839A (ko) 1985-04-10
AU3179584A (en) 1985-02-21

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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18W Application withdrawn

Withdrawal date: 19870109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: OKU, MASAHARU

Inventor name: SAWAHATA, KAZUO

Inventor name: KANAMARU, HISANOBU

Inventor name: TSURUOKA, KAZUHIRO