US20130133173A1 - Method and device for setting connecting elements that are self-drilling without chip formation - Google Patents

Method and device for setting connecting elements that are self-drilling without chip formation Download PDF

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Publication number
US20130133173A1
US20130133173A1 US13/704,045 US201113704045A US2013133173A1 US 20130133173 A1 US20130133173 A1 US 20130133173A1 US 201113704045 A US201113704045 A US 201113704045A US 2013133173 A1 US2013133173 A1 US 2013133173A1
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US
United States
Prior art keywords
connecting element
induction coil
self
metal sheet
chip formation
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
US13/704,045
Inventor
Stefan Ahlborn
Robert Bongartz
Stephan Esper
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.)
Ruia Global Fasteners AG
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Ruia Global Fasteners AG
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 Ruia Global Fasteners AG filed Critical Ruia Global Fasteners AG
Assigned to RUIA GLOBAL FASTENERS AG reassignment RUIA GLOBAL FASTENERS AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AHLBORN, STEFAN, BONGARTZ, ROBERT, ESPER, STEPHAN
Publication of US20130133173A1 publication Critical patent/US20130133173A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • 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
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/025—Setting self-piercing rivets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/02—Riveting procedures
    • B21J15/08—Riveting by applying heat, e.g. to the end parts of the rivets to enable heads to be formed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/063—Friction heat forging
    • B21J5/066—Flow drilling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49833—Punching, piercing or reaming part by surface of second part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5343—Means to drive self-piercing work part

Definitions

  • the present invention relates to a method for inserting connecting elements which are self-boring without chip formation, such as screws or blind rivets, into one or more metal sheets, the metal sheet(s) being heated by means of electrical energy shortly before commencement of the insertion operation.
  • the present invention relates to a corresponding device for inserting a connecting element which is self-boring without chip formation into one or more metal sheets.
  • Connecting elements which are self-boring without chip formation which are also referred to as flow-hole drilling screws or flow-hole connecting elements, are increasingly used as the preferred choice in industry, since rough-drilling and thread-cutting can be avoided when they are used and no chips occur when they are handled.
  • connecting elements could only be used in conjunction with normal steel sheets and aluminium sheets. Use in high-tensile steel sheets without rough-drilling ceased, since the thermal energy which can be transmitted by the connecting element is not sufficient to appropriately soften a high-tensile steel sheet.
  • this object is achieved by a method in which heating takes place by means of an induction coil which is arranged in the vicinity of a point on the metal sheet(s) at which the connecting element is inserted.
  • the present object can be achieved according to the invention by a device for inserting a connecting element which is self-boring without chip formation into one or more metal sheets, which device is provided with an induction coil which is arranged, at least before and/or during the insertion operation, in the vicinity of the point on the metal sheet(s) at which the connecting element is intended to be inserted.
  • the induction coil prefferably be concentrically arranged with respect to the point on the metal sheet(s) at which the connecting element is intended to be inserted.
  • the induction coil prefferably has a central opening and to remain above the metal sheet(s) during the insertion operation, and for the connecting element to be inserted through this central opening in the induction coil.
  • FIG. 1 is a front view of a device according to the invention for inserting connecting elements which are self-boring without chip formation;
  • FIG. 2 is a side view of the device in FIG. 1 ;
  • FIG. 3 shows detail A in FIG. 1 ;
  • FIG. 4 shows detail B in FIG. 1 .
  • FIG. 1 shows a device according to the invention for inserting a connecting element which is self-boring without chip formation into one or more metal sheets.
  • the device 10 in this case comprises a retainer 12 which bears, in the manner of an upright drill, a screwdriver 14 .
  • the screwdriver bears a connecting element 16 , which in this case is a screw which is self-boring without chip formation, that is, a connecting element 16 having a self-boring auger bit and outer thread.
  • the connecting element 16 is intended to be inserted into two metal sheets 18 , 20 which are arranged on a support 22 having a recess 24 beneath the point at which the connecting element 16 is intended to be inserted.
  • a circular ring-shaped induction coil 26 is arranged above the recess 24 and above the two metal sheets 18 , 20 .
  • the induction coil 26 in this case has a central opening which is concentrically arranged with respect to the point at which the connection element 16 is intended to be inserted.
  • the insertion operation then proceeds as follows.
  • the induction coil 26 is supplied with an alternating current of suitable frequency and voltage for a sufficiently long period of time for the region of the metal sheets 18 , 20 which is beneath the induction coil 26 and thus above the recess 24 to be sufficiently heated.
  • connecting element 16 which is self-boring without chip formation is inserted, in the manner in which connecting elements which are self-boring without chip formation known in the prior art are inserted, at the point in the two metal sheets 18 , 20 which has now been heated according to the invention.
  • the recess 24 on one hand provides the space which accommodates the portion of the connecting element 16 which projects downwardly out of and beyond the metal sheets 18 , 20 after insertion, and on the other hand prevents the metal sheets 18 , 20 from cooling or prevents thermal dissipation therefrom via the support 22 .
  • metal sheets 18 , 20 made of substantially harder steel categories are able to be connected to or fitted with connecting elements which are self-boring without chip formation.
  • connection element 16 is also able to be inserted according to the invention into just a single metal sheet, or into three or more metal sheets.

Abstract

The invention relates to a method for setting connecting elements (16), such as screws or blind rivets, which are self-drilling without chip formation, in one or more plates, wherein the plate(s) are heated by electrical energy shortly before the start of the setting process, wherein the heating is accomplished by means of an induction coil (26), which is arranged near a point on the plate(s) at which the connecting element (16) is set. The invention further relates to a device (10) for setting a connecting element (16), which is self-drilling without chip formation, in one or more plates, comprising an induction coil (26), which at least before and/or during the setting process is arranged near a point on the plate(s), at which the connecting element (16) is set.

Description

    TECHNICAL FIELD
  • The present invention relates to a method for inserting connecting elements which are self-boring without chip formation, such as screws or blind rivets, into one or more metal sheets, the metal sheet(s) being heated by means of electrical energy shortly before commencement of the insertion operation. In addition, the present invention relates to a corresponding device for inserting a connecting element which is self-boring without chip formation into one or more metal sheets.
  • Connecting elements which are self-boring without chip formation, which are also referred to as flow-hole drilling screws or flow-hole connecting elements, are increasingly used as the preferred choice in industry, since rough-drilling and thread-cutting can be avoided when they are used and no chips occur when they are handled.
    • PRIOR ART
  • However, until now, these connecting elements could only be used in conjunction with normal steel sheets and aluminium sheets. Use in high-tensile steel sheets without rough-drilling ceased, since the thermal energy which can be transmitted by the connecting element is not sufficient to appropriately soften a high-tensile steel sheet.
  • As a solution to this problem, the closest prior art in this regard, DE 196 34 417 A1, has already proposed heating the material of the metal sheet into which the connecting element is to be inserted by means of electrical energy in the form of an electric arc between a tool used for boring and the metal sheet.
  • This proposal, however, has considerable drawbacks, since the current density is always substantially higher in the auger bit of the boring tool than in the large-area metal sheet. As a result, the auger bit heats up more than the metal sheet and is softened more than the metal sheet, which is clearly counter-productive from the perspective of the object addressed herein. In addition, the bit of the boring tool, the form of which bit is of exceptionally great significance to correct boring, is damaged or deformed by the electric arc and the associated burning of the contacts, and this in turn can render boring considerably more difficult.
    • SUMMARY OF THE INVENTION
  • It is therefore an object of the present invention to make it possible to insert connecting elements which are self-boring without chip formation into high-tensile steel sheets directly during heating of the metal sheet and without using a separate boring tool.
  • According to the invention, this object is achieved by a method in which heating takes place by means of an induction coil which is arranged in the vicinity of a point on the metal sheet(s) at which the connecting element is inserted.
  • Similarly, the present object can be achieved according to the invention by a device for inserting a connecting element which is self-boring without chip formation into one or more metal sheets, which device is provided with an induction coil which is arranged, at least before and/or during the insertion operation, in the vicinity of the point on the metal sheet(s) at which the connecting element is intended to be inserted.
  • It is preferable in this case for the induction coil to be concentrically arranged with respect to the point on the metal sheet(s) at which the connecting element is intended to be inserted.
  • It is particularly preferable for the induction coil to have a central opening and to remain above the metal sheet(s) during the insertion operation, and for the connecting element to be inserted through this central opening in the induction coil.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • In the following, the present invention is described in greater detail on the basis of the embodiment depicted in the appended drawings, in which:
  • FIG. 1 is a front view of a device according to the invention for inserting connecting elements which are self-boring without chip formation;
  • FIG. 2 is a side view of the device in FIG. 1;
  • FIG. 3 shows detail A in FIG. 1; and
  • FIG. 4 shows detail B in FIG. 1.
    •  PREFERRED MEANS OF CARRYING OUT THE INVENTION
  • FIG. 1 shows a device according to the invention for inserting a connecting element which is self-boring without chip formation into one or more metal sheets. The device 10 in this case comprises a retainer 12 which bears, in the manner of an upright drill, a screwdriver 14. At its screwing tool, the screwdriver bears a connecting element 16, which in this case is a screw which is self-boring without chip formation, that is, a connecting element 16 having a self-boring auger bit and outer thread.
  • In the present embodiment, the connecting element 16 is intended to be inserted into two metal sheets 18, 20 which are arranged on a support 22 having a recess 24 beneath the point at which the connecting element 16 is intended to be inserted.
  • According to the invention, a circular ring-shaped induction coil 26 is arranged above the recess 24 and above the two metal sheets 18, 20. The induction coil 26 in this case has a central opening which is concentrically arranged with respect to the point at which the connection element 16 is intended to be inserted.
  • According to the invention, the insertion operation then proceeds as follows.
  • The induction coil 26 is supplied with an alternating current of suitable frequency and voltage for a sufficiently long period of time for the region of the metal sheets 18, 20 which is beneath the induction coil 26 and thus above the recess 24 to be sufficiently heated.
  • Thereafter, the connecting element 16 which is self-boring without chip formation is inserted, in the manner in which connecting elements which are self-boring without chip formation known in the prior art are inserted, at the point in the two metal sheets 18, 20 which has now been heated according to the invention.
  • The recess 24 on one hand provides the space which accommodates the portion of the connecting element 16 which projects downwardly out of and beyond the metal sheets 18, 20 after insertion, and on the other hand prevents the metal sheets 18, 20 from cooling or prevents thermal dissipation therefrom via the support 22.
  • According to the invention, even metal sheets 18, 20 made of substantially harder steel categories are able to be connected to or fitted with connecting elements which are self-boring without chip formation.
  • As an alternative to the embodiment explained here for inserting the connecting element 16 into two metal sheets 18, 20, the connection element is also able to be inserted according to the invention into just a single metal sheet, or into three or more metal sheets.

Claims (6)

1. Method for inserting connecting elements (16) which are self-boring without chip formation, such as screws or blind rivets, into one or more metal sheets (18, 20), said method including the steps of:
heating the metal sheet(s) (18, 20) by means of electrical energy shortly before commencement of the insertion operation, heating takes place by means of an induction coil (26) arranged in the vicinity of a point on the metal sheet(s) (18, 20) at which the connecting element is inserted (16).
2. The method according to claim 1, wherein the induction coil (26) is concentrically arranged with respect to the point on the metal sheet(s) (18, 20) at which the connecting element (16) is inserted.
3. The method according to claim 2, wherein the induction coil (26) has a central opening and remains above the metal sheet(s) (18, 20) during the insertion operation, and the connecting element (16) is inserted through the central opening in the induction coil (26).
4. Device (10) for inserting a connecting element (16) which is self-boring without chip formation into one or more metal sheets (18, 20), said device comprising: an induction coil (26) arranged, at least before and/or during the insertion operation, in a vicinity of a point on the metal sheet(s) (18, 20) at which the connecting element (16) is inserted.
5. The device (10) according to claim 4, wherein the induction coil (26) is, at least before and/or during the insertion operation, concentrically arranged with respect to the point on the metal sheet(s) (18, 20) at which the connecting element (16) is inserted.
6. The device (10) according to claim 5, wherein the induction coil (26) has a central opening and is arranged such that the connection element (16) penetrates this opening during the insertion operation.
US13/704,045 2010-06-16 2011-06-09 Method and device for setting connecting elements that are self-drilling without chip formation Abandoned US20130133173A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010024000A DE102010024000A1 (en) 2010-06-16 2010-06-16 Method and device for setting non-cutting self-perforating fasteners
DE102010024000 2010-06-16
PCT/DE2011/050019 WO2012019601A2 (en) 2010-06-16 2011-06-09 Method and device for setting connecting elements that are self-drilling without chip formation

Publications (1)

Publication Number Publication Date
US20130133173A1 true US20130133173A1 (en) 2013-05-30

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US13/704,045 Abandoned US20130133173A1 (en) 2010-06-16 2011-06-09 Method and device for setting connecting elements that are self-drilling without chip formation

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US (1) US20130133173A1 (en)
EP (1) EP2582476A2 (en)
JP (1) JP2013530842A (en)
KR (1) KR20130040950A (en)
CN (1) CN103037999A (en)
AU (1) AU2011288686A1 (en)
BR (1) BR112012031509A2 (en)
CA (1) CA2804291A1 (en)
DE (1) DE102010024000A1 (en)
MX (1) MX2012014648A (en)
WO (1) WO2012019601A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11426788B2 (en) 2016-09-26 2022-08-30 Newfrey Llc Method for joining at least one component to a second component without preformed hole(s)

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DE102019108813B4 (en) * 2019-04-04 2024-02-29 Volkswagen Aktiengesellschaft Process for mechanical joining
FR3095971B1 (en) * 2019-05-15 2022-05-27 Psa Automobiles Sa Method and installation for assembling at least two sheets by riveting

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Publication number Publication date
BR112012031509A2 (en) 2016-11-08
WO2012019601A2 (en) 2012-02-16
AU2011288686A1 (en) 2013-01-31
KR20130040950A (en) 2013-04-24
CA2804291A1 (en) 2012-02-16
DE102010024000A1 (en) 2011-12-22
WO2012019601A3 (en) 2012-04-05
MX2012014648A (en) 2013-02-21
EP2582476A2 (en) 2013-04-24
CN103037999A (en) 2013-04-10
JP2013530842A (en) 2013-08-01

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Owner name: RUIA GLOBAL FASTENERS AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:AHLBORN, STEFAN;BONGARTZ, ROBERT;ESPER, STEPHAN;REEL/FRAME:029739/0354

Effective date: 20121210

STCB Information on status: application discontinuation

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