DE4026603A1 - Stepped spot weld drill bit - for partial drilling out of sheet spot welds - Google Patents

Stepped spot weld drill bit - for partial drilling out of sheet spot welds

Info

Publication number
DE4026603A1
DE4026603A1 DE19904026603 DE4026603A DE4026603A1 DE 4026603 A1 DE4026603 A1 DE 4026603A1 DE 19904026603 DE19904026603 DE 19904026603 DE 4026603 A DE4026603 A DE 4026603A DE 4026603 A1 DE4026603 A1 DE 4026603A1
Authority
DE
Germany
Prior art keywords
sheet
spot
spot weld
drill bit
drilling
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Withdrawn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
DE19904026603
Other languages
German (de)
Inventor
Peter Baessler
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.)
Berner GmbH
Original Assignee
Individual
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
Priority claimed from DE9004502U external-priority patent/DE9004502U1/en
Application filed by Individual filed Critical Individual
Priority to DE19904026603 priority Critical patent/DE4026603A1/en
Publication of DE4026603A1 publication Critical patent/DE4026603A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/18—Configuration of the drill point

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

In a stepped spot weld drill bit (similar to DIN 1412 Form E) for oartially drilling out the spot welds of sheet joints, the novelty is that the step corresponds to the thickness of the sheet material to be drilled and, on drilling the sheet surface, produces a circular cut with level removal of spot weld material. USE/ADVANTAGE - The drill bit is esp. useful in automobile repair, e.g., for body panel replacement. It avoids undesired through-drilling of the spot weld and the sheet or panel to be retained is not distorted or damaged.

Description

Die vorliegende Erfindung geht von einem gemäß dem Oberbegriff des Hauptanspruches konzipierten Schweißpunktbohrer mit einer der Blechdicke entsprechenden Abstufung aus.The present invention is based on one according to the preamble of the main claim designed with spot weld drills a gradation corresponding to the sheet thickness.

Die Abstufungslänge (L) verhält sich senkrecht zu Längsachse des Schweißpunktbohrers. Sie entspricht dem zu bohrenden Blech minus 0,05 mm (Toleranz). Die Abstufungsbreite (D) verhält sich waagerecht zur Längsachse des Schweißpunktbohrers. Sie entspricht dem Arbeitseinsatz, aber max. 1,5 mm im Karosseriebau. Die Abstufung ist schnittig, da sie durch Anbohren in geringer Tiefe dem Anwender die ebene Beseitigung des Schweißpunktes anzeigt und bei schräger Haltung der Handbohrmaschine die Mög­ lichkeit der Korrektur läßt. The step length (L) is perpendicular to the longitudinal axis of the spot weld drill. It corresponds to the sheet to be drilled minus 0.05 mm (tolerance). The gradation width (D) behaves horizontal to the longitudinal axis of the spot weld drill. It corresponds the work assignment, but max. 1.5 mm in body construction. The gradation is sleek, as it is reduced by tapping Depth the user the level elimination of the welding spot displays and if the hand drill is held at an angle, the poss correction.  

Stand der TechnikState of the art

Schweißpunktbohrer und Schweißpunktfräser finden besonders in der Automobilreparatur ihre Anwendung. Diese Werkzeuge weisen beträchtliche Nachteile für den Anwender auf.Spot weld drills and spot weld milling cutters find something special their application in automotive repair. These tools point considerable disadvantages for the user.

Der Schweißpunktfräser in Kronenform umfräst den Schweißpunkt, so daß der Schweißpunkt nachträglich abgeschliffen werden muß. Der Schweißpunktbohrer, in der herkömmlichen Form ohne Ab­ stufung, neigt zum ungewollten Durchbohren der Blechverbindungen an der punktgeschweißten Stelle.The welding spot cutter in the form of a crown mills the welding spot, so that the welding point has to be ground off afterwards. The spot weld drill, in the conventional form without Ab gradation, tends to inadvertently pierce the sheet metal connections at the spot welded point.

Der Schweißpunktbohrer in einer Pneumatikzange zwangsgeführt, hat den Nachteil, daß nur Schw.-punkte, welche gut zugänglich sind, entfernt werden können.The spot weld drill positively guided in a pneumatic pliers, has the disadvantage that only weak points, which are easily accessible are can be removed.

Die Karosseriebleche eines Automobiles sind in der Regel 0,8 mm dick. Die Trennung durch Bohren oder Fräsen bringt es mit den bisherigen Werkzeugen mit sich, daß das zu erhaltene Blech an der Schweißpunktstelle um 0,1 bis 0,2 mm, meist schräg, verjüngt wird. Dies ist bei handbohrmaschinengeführten Werkzeugen die Regel, da ein Aufsetzen bzw. Führen der Maschinen von 90° selten möglich ist.The body panels of an automobile are usually 0.8 mm thick. The separation by drilling or milling brings with it previous tools that the sheet to be obtained the spot weld is tapered by 0.1 to 0.2 mm, usually at an angle becomes. This is the case with hand-held machine tools Rule because the machines are placed or guided at 90 ° is rarely possible.

Hier ist der Vorteil des abgestuften Schweißpunktbohrers gegen­ über den herkömmlichen Werkzeugen: Kein ungewolltes Durchbohren der Schweißpunktstelle, da die Abstufung durch Anbohren des zu entfernenten Bleches dem Anwender die Beseitigung des Schweiß­ punktes deutlich anzeigt, da die Abstufung der Blechdicke ent­ spricht. Die Bohrtiefen sind fortlaufend vereinheitlicht und das zu erhaltene Blech ist ohne Vertiefungen und Aufwürfungen an den Schweißpunktstellen. Während des Bohrens kann der Anwen­ der anhand des Schnittbildes der Abstufung die Führung der Hand­ bohrmaschine leicht korrigieren.Here is the advantage of the stepped spot weld drill against over conventional tools: no unwanted drilling the welding point, since the gradation by drilling the removal of sweat to the user removing the sweat point clearly indicates that the gradation of the sheet thickness ent speaks. The drilling depths are continuously standardized and the sheet to be obtained is without depressions and peaks at the welding points. During drilling, the user can the guidance of the hand based on the sectional image of the gradation Correct the drilling machine easily.

Bisher war der Anwender in der Handhabung der Werkzeuge der Möglichkeit des Durchbohrens wegen vorsichtig oder gehemmt. Er kann mit dem abgestuften Schweißpunktbohrer mit einer kon­ stanten Drehzahl und in einem Arbeitsgang, ohne Kontrollunter­ brechung, die Schweißpunkte entfernen.So far, the user was handling the tools of the Possibility of piercing due to careful or inhibited. It can be used with the stepped spot weld drill with a con constant speed and in one operation, without control sub refraction, remove the welding spots.

Claims (1)

Abgestufter Schweißpunktbohrer, ähnlich DIN 1412 Form E, zum teilweisen Ausbohren von Schweißpunkten an Blechverbindungen im Punktschweißverfahren, dadurch gekennzeich­ net, daß die Abstufung der Blechdicke des zu bohrenden Materials entspricht und durch Anbohren der Blechoberfläche dem Anwender durch ein kreisrundes Schnittbild die ebene Beseitigung des Schweißpunktes anzeigt.Graduated spot weld drill, similar to DIN 1412 Form E, for partially drilling out weld spots on sheet metal connections using the spot welding process, characterized in that the gradation corresponds to the sheet thickness of the material to be drilled and by drilling the sheet surface to the user by means of a circular sectional view, the level removal of the spot weld is indicated .
DE19904026603 1990-04-20 1990-08-23 Stepped spot weld drill bit - for partial drilling out of sheet spot welds Withdrawn DE4026603A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904026603 DE4026603A1 (en) 1990-04-20 1990-08-23 Stepped spot weld drill bit - for partial drilling out of sheet spot welds

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9004502U DE9004502U1 (en) 1990-04-20 1990-04-20 Stepped spot weld drill for spot welded sheets
DE19904026603 DE4026603A1 (en) 1990-04-20 1990-08-23 Stepped spot weld drill bit - for partial drilling out of sheet spot welds

Publications (1)

Publication Number Publication Date
DE4026603A1 true DE4026603A1 (en) 1991-04-18

Family

ID=25896129

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19904026603 Withdrawn DE4026603A1 (en) 1990-04-20 1990-08-23 Stepped spot weld drill bit - for partial drilling out of sheet spot welds

Country Status (1)

Country Link
DE (1) DE4026603A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402448B1 (en) * 1997-04-15 2002-06-11 A-Z Ausrüstung und Zubehör GmbH & Co. Self-drilling and self-tapping screw
EP1334787A1 (en) * 2002-02-01 2003-08-13 Kennametal Inc. Rotary cutting tool
US7140815B2 (en) * 2003-01-30 2006-11-28 Kennametal Inc. Drill for making flat bottom hole
US7832966B2 (en) 2003-01-30 2010-11-16 Kennametal Inc. Drill for making flat bottom hole
US20140308086A1 (en) * 2013-04-12 2014-10-16 Kennametal, Inc. Drill head

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6402448B1 (en) * 1997-04-15 2002-06-11 A-Z Ausrüstung und Zubehör GmbH & Co. Self-drilling and self-tapping screw
EP1334787A1 (en) * 2002-02-01 2003-08-13 Kennametal Inc. Rotary cutting tool
US6929434B2 (en) 2002-02-01 2005-08-16 Kennametal Inc. Rotary cutting tool
US7140815B2 (en) * 2003-01-30 2006-11-28 Kennametal Inc. Drill for making flat bottom hole
US7832966B2 (en) 2003-01-30 2010-11-16 Kennametal Inc. Drill for making flat bottom hole
US20140308086A1 (en) * 2013-04-12 2014-10-16 Kennametal, Inc. Drill head

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
8139 Disposal/non-payment of the annual fee
8127 New person/name/address of the applicant

Owner name: BERNER GMBH, 74653 KUENZELSAU, DE

8181 Inventor (new situation)

Free format text: BAESSLER, PETER, 45964 GLADBECK, DE