EP2292347A1 - Méthode de fabrication d'un boulon - Google Patents

Méthode de fabrication d'un boulon Download PDF

Info

Publication number: EP2292347A1
Authority: EP; European Patent Office
Prior art keywords: workpiece; longitudinal direction; tie; bolt; mould
Prior art date: 2009-09-04
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.): Granted

Application number

EP10174806A

Other languages

German (de)

English (en)

Other versions

EP2292347B1 (fr

Inventor

Gaetano Mauri

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.)

Flli Mauri Srl

Original Assignee

Flli Mauri Srl

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.)

2009-09-04

Filing date

2010-09-01

Publication date

2011-03-09

2010-09-01 Application filed by Flli Mauri Srl filed Critical Flli Mauri Srl

2011-03-09 Publication of EP2292347A1 publication Critical patent/EP2292347A1/fr

2012-03-14 Application granted granted Critical

2012-03-14 Publication of EP2292347B1 publication Critical patent/EP2292347B1/fr

Status Active legal-status Critical Current

2030-09-01 Anticipated expiration legal-status Critical

Links

Images

Classifications

- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
- B21K1/463—Making machine elements bolts, studs, or the like with heads with recessed heads
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/44—Making machine elements bolts, studs, or the like
- B21K1/46—Making machine elements bolts, studs, or the like with heads
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/56—Making machine elements screw-threaded elements
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K21/00—Making hollow articles not covered by a single preceding sub-group
- B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs

Definitions

the present invention relates to a method for producing shaped pins/tie-bolts, particularly, but not exclusively, to be associated with devices for joining two parts arranged at 90° relative to each other.
screw/female thread means are widely used, these essentially consisting of a cylindrical tie-bolt, to be concealingly inserted inside a corresponding seat/bushes of one of the two parts and designed to form the part reacting against a grub screw which engages in the transverse direction with said cylindrical member, being screwed onto the female thread of a bush integral with the other part to be joined and thus causing pulling together of the two parts which bear against each other, remaining fastened together.
DE-GM-93 19 728 also discloses a method for forming a solid workpiece which envisages insertion of the said workpiece inside moulds where it is shortened and shaped to the final size of the finished workpiece.
this method envisages however the need to start with a workpiece having an initial size larger than its final size, thereby producing a large amount of machining swarf and wasted material.
the technical problem which is posed, therefore, is to develop a method for the simple and low-cost production of shaped pins/tie-bolts, particularly, but not exclusively suitable for association with a device for joining together two parts, for example the component parts of a piece of furniture or the like.
this method should allow the production of pins/tie-bolts which are in any case shaped, but sufficiently strong, with a substantial saving in material, and, if necessary, provided with means for operation using normal standardized tools by any user, even without specialized skills.
the method for producing a pin/tie-bolt according to the present invention comprises essentially the following steps:
FIGS 2a,2b and 3a, 3b show two pins/tie-bolts 110,210, respectively, which, in addition to the different threading, also have different lengths of the two top and bottom cylindrical sections and of the middle collar.
tie-bolts and/or pins generally in a simple, low cost and versatile manner, by means of machining steps which are all cold-machining steps, without the need for subsequent intermediate machine-tool operations, with obvious advantages in terms of reduction of the tooling, production downtime and therefore final costs of the workpiece.
the top cylindrical part ( Fig. 1c ) with associated inset seat may be obtained in a single pass, omitting step 1b, and in the same way closing of the cylindrical top part ( Fig. 1e ) may be obtained in a single pass 1e, omitting step 1d.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Forging (AREA)
Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
Joining Of Building Structures In Genera (AREA)

EP10174806A 2009-09-04 2010-09-01 Méthode de fabrication d'un boulon Active EP2292347B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT001532A ITMI20091532A1 (it)	2009-09-04	2009-09-04	Procedimento per la produzione di un perno/tirante

Publications (2)

Publication Number	Publication Date
EP2292347A1 true EP2292347A1 (fr)	2011-03-09
EP2292347B1 EP2292347B1 (fr)	2012-03-14

Family

ID=42102609

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP10174806A Active EP2292347B1 (fr)	2009-09-04	2010-09-01	Méthode de fabrication d'un boulon

Country Status (3)

Country	Link
EP (1)	EP2292347B1 (fr)
AT (1)	ATE549109T1 (fr)
IT (1)	ITMI20091532A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01202333A (ja) *	1988-02-05	1989-08-15	Sakamura Kikai Seisakusho:Kk	円錐案内部をもつロボット用ボルトの製造方法
DE9319728U1 (de) *	1993-12-22	1994-06-16	Möhling GmbH & Co., 58762 Altena	Bolzen mit einer Ausformung in Form einer Spitze, Kugel o.dgl.
DE19918196A1 (de) *	1999-04-22	2000-10-26	Heinrich Hofsaes Gmbh & Co	Stellschraube
JP2008213040A (ja) *	2007-01-22	2008-09-18	Nishio Seimitsu Kk	中空鍛造部材及び中空鍛造部材の製造方法

2009
- 2009-09-04 IT IT001532A patent/ITMI20091532A1/it unknown
2010
- 2010-09-01 EP EP10174806A patent/EP2292347B1/fr active Active
- 2010-09-01 AT AT10174806T patent/ATE549109T1/de active

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH01202333A (ja) *	1988-02-05	1989-08-15	Sakamura Kikai Seisakusho:Kk	円錐案内部をもつロボット用ボルトの製造方法
DE9319728U1 (de) *	1993-12-22	1994-06-16	Möhling GmbH & Co., 58762 Altena	Bolzen mit einer Ausformung in Form einer Spitze, Kugel o.dgl.
DE19918196A1 (de) *	1999-04-22	2000-10-26	Heinrich Hofsaes Gmbh & Co	Stellschraube
JP2008213040A (ja) *	2007-01-22	2008-09-18	Nishio Seimitsu Kk	中空鍛造部材及び中空鍛造部材の製造方法

Also Published As

Publication number	Publication date
ATE549109T1 (de)	2012-03-15
ITMI20091532A1 (it)	2011-03-05
EP2292347B1 (fr)	2012-03-14

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