WO2002098592A1 - Porte-broche - Google Patents

Porte-broche Download PDF

Info

Publication number
WO2002098592A1
WO2002098592A1 PCT/US2001/017938 US0117938W WO02098592A1 WO 2002098592 A1 WO2002098592 A1 WO 2002098592A1 US 0117938 W US0117938 W US 0117938W WO 02098592 A1 WO02098592 A1 WO 02098592A1
Authority
WO
WIPO (PCT)
Prior art keywords
insert support
cutting inserts
insert
cutting
inserts
Prior art date
Application number
PCT/US2001/017938
Other languages
English (en)
Inventor
Raymond T. Miller
Richard A. Sharp
Original Assignee
Rolls-Royce Corporation
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 Rolls-Royce Corporation filed Critical Rolls-Royce Corporation
Priority to GB0327463A priority Critical patent/GB2390992B/en
Priority to PCT/US2001/017938 priority patent/WO2002098592A1/fr
Priority to US09/965,104 priority patent/US6702524B2/en
Publication of WO2002098592A1 publication Critical patent/WO2002098592A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D43/00—Broaching tools
    • B23D43/02—Broaching tools for cutting by rectilinear movement
    • B23D43/04—Broaching tools for cutting by rectilinear movement having inserted cutting edges

Definitions

  • the present invention relates generally to broaching tools. More particularly, one form of the present invention relates to a broach tool having a row of removable cutting inserts spaced apart and supported by removable insert support members. Although the present invention was developed for an application involving manufacturing gas turbine engine components, many applications may be outside this field.
  • Broaching tools have been used for many years for the machining of metallic materials, and for specific operations such as broaching slots, openings or channels in structures.
  • One conventional broaching tool is a unitary broach having a plurality of cutting teeth integrally formed on a cutting bar.
  • Conventional unitary broaches have some inherent limitations in their designs.
  • One limitation associated with the unitary broach with integral cutting teeth is that the worst tooth limits the quality of the overall broaching tool. For example, the existence of an undersized cutting tooth results in an overloading of the next tooth, as well as making it often necessary, because of wear or otherwise, to substantially rework the tool or discard the entire tool even though there is still useful life left in many of the other cutting teeth.
  • a second type of conventional broaching tool includes a plurality of separate cutting inserts that are fixed to the tool body.
  • the cuttmg inserts are typically formed from a carbide material or other hard metal and permanently attached to the tool body in a brazed construction or removably clamped to the tool body by a mechanical clamping structure.
  • Brazed construction broaching tools have generally been limited by failure of the braze joint in the broaching tool manufacturing process or during the utilization of the broaching tool in a manufacturing process of forming an opening in a workpiece.
  • the repair and requalification of a broaching tool is a lengthy and time intensive process.
  • a broach tool comprising: a plurality of cutting inserts having a root portion and a cutting portion, the root portion has a base surface and a restraining surface; a carrier including a longitudinally elongated slot defined in the carrier by opposed first and second side walls, a base wall and a top wall, each of the root portions disposed within the longitudinal slot with the base surface located adjacent the base wall and the restraining surface located adjacent the top wall and the cutting portions extending from the carrier; and, an insert support member separable from the carrier and positioned between and longitudinally spacing a pair of the plurality of cutting inserts within the slot, the insert support member extending substantially along the pair of cutting inserts and adapted to reinforce at least one of the pair of cutting inserts during a broaching operation.
  • a broach tool comprising: a plurality of broaching inserts having a first retaining portion and a cutting portion; a holder including a longitudinally extending slot defined in the holder, each of the first retaining portions is located within the slot and captured by a portion of the holder, the cutting portion extending from the holder through a longitudinally extending opening in the top wall; and, a plurality of insert support members having a second retaining portion located within the slot and captured by the portion of the holder, one of the plurality of insert support members is located between and longitudinally spaces apart adjacent ones of the plurality of broaching inserts, each of the plurality of insert support members abutting the adjacent ones of the plurality of broaching inserts along a bracing portion, and the bracing portion adapted to reinforce the broaching insert during a broaching operation.
  • One object of the present invention is to provide a unique broaching tool.
  • FIG. 3 is an end view of the broaching tool of FIG. 1, with the front loading member removed to show the location of the cutting insert within the longitudinal slot.
  • FIG. 4 is a side view of one embodiment of a cutting insert comprising a portion of the FIG. 1 broaching tool.
  • FIG. 5 is an end view of the FIG. 4 cutting insert.
  • FIG. 6 is a side view of one embodiment of an insert support member comprising a portion of the FIG. 1 broaching tool.
  • FIG. 7 is an end view of the FIG. 6 insert support member.
  • FIG. 8 is a sectional view through the root portions of a cutting insert positioned between a pair of insert support members.
  • FIG. 9 is a sectional view through the root portions of an alternate embodiment of a cutting insert positioned between a pair of insert support members.
  • the plurality of cutting inserts 22 is positioned between a front-loader member 23 and a rear-backing member 24.
  • An insert support member 25, that is separable from the broach carrier 21, is coupled with the broach carrier 21 and positioned between adjacent pairs of the plurality of cutting inserts 22.
  • each of the plurality of insert support members 25 longitudinally space the cutting inserts 22 and provide bracing for a cutting insert 22 during the broaching process.
  • the insert support member 25 extends along the substantial entire length of the cutting insert 22. In one form of the present invention the insert support members 25 extend to within ten thousandths of an inch from the tip 22b of the cutting insert.
  • the broaching assembly 20 is adapted to be coupled to the support member of a broaching machine by a plurality of fasteners 26.
  • a bolster defines the support member.
  • Each of the plurality of fasteners 26 passes through an opening 27 formed in the broach carrier 21 and is adapted to engage a correspondingly threaded opening in the support member of the broaching machine.
  • the broaching assembly 20 is configured to be readily coupled to a variety of machines that can be utilized for broaching an opening in a workpiece.
  • the front-loader member 23 and the rear-backing member 24 are coupled to the main body member 30 by threaded fasteners 34 and 35.
  • the front-loader member 23 is configured to be received within a rehef 37 formed in the main body member 30.
  • the relief-engaging perimeter 38 of the front-loader member 23 is received within the relief 37 defined in the front end 33 of the main body-member 30.
  • the front-loader member 23 has a root portion 39 that is captured between a base surface 40 of the main body member 30, opposed side surfaces 41 and 42 of the main body member 30 and an underside surface 43 of each of the removable cover members 31.
  • the front-loader member and/or the rear-backing member are connected to the main body member in a flush abutting type of mounting arrangement.
  • Each of the front-loader member 23, the rear backing member 24 and the pair of removable cover members 31 are preferably formed of a metallic material. In one form of the present invention they are formed of the same material as the main body member 30.
  • Base surface 61 of the root portion 60 abuts the base wall 48 and the pair of restraining surfaces 62 and 63 abut the underside surfaces 52 and 53 of the removable cover wall members 31.
  • the insert support member 25 has a centerline Q, and the restraining surfaces 62 and 63 extend from the insert support member body on both sides of the centerline.
  • the restraining surfaces portion of the insert support members 25 are of different size to facilitate locating the insert support members within the slot in a specific orientation.
  • the present invention contemplates other geometric relationships between the restraining surface portions.
  • the present invention contemplates cutting inserts having other geometric shapes and formed of a variety of materials and is not Umited to the specific geometric configurations illustrated unless provided to the contrary.
  • any cutting insert utilized in the present invention requires an attachment structure compatible with the channel structure of the broach carrier of the present invention.
  • the cutting insert 22 preferably includes a lateral support surface defined on each of the opposed faces 70 and 71 that is designed to provide lateral support for the cutting inserts 22.
  • the lateral support surfaces on the faces 70 and 71 are configured to engage with a corresponding lateral support surface defined on the adjacent insert support members 25.
  • the lateral support surfaces are preferably defined by a serrated or notched configuration.
  • Insert support member 25 has a lateral support surface 100 defined on a first surface 101 that is configured to engage with the lateral support surfaces on side 71 of the cutting insert 22.
  • a second lateral support surface 103 that is configured to engage with the lateral support surfaces on side 70 of the cutting insert 22.
  • the lateral support surfaces 101 and 103 are preferably defined by a serrated or notched configuration.
  • the insert support members 25 are formed of a material that is softer than the material that the cutting inserts 22 are formed of. This allows for some deformation of the insert support members 25 during assembly to compensate for misalignment matters.
  • the fluid flow channels allow for the passage of a fluid along the length of the cutting insert 22 and to be discharged during the broaching operation.
  • the fluid is a lubricant or coolant that is discharged at the second end 82.
  • other discharge locations for the fluid are contemplated herein.
  • the present invention contemplates that there may only be one fluid flow channel or a plurality of fluid flow channels. It is also contemplated herein that one embodiment of the present invention does not have a fluid flow channel defined between the insert support member 25 and the cutting insert 22.

Abstract

L'invention concerne un outil à brocher qui présente une rangée de tourteaux (22) espacés par des éléments de support de tourteaux amovibles (25). Les éléments de support de tourteaux (25) et les tourteaux (22) présentent chacun une partie socle emprisonnée à l'intérieur du corps principal de l'outil à brocher. Un support d'entretoise est fourni à chaque tourteau (22) pendant l'opération de brochage par un des éléments de support de tourteaux (25).
PCT/US2001/017938 2001-06-04 2001-06-04 Porte-broche WO2002098592A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0327463A GB2390992B (en) 2001-06-04 2001-06-04 Broach carrier
PCT/US2001/017938 WO2002098592A1 (fr) 2001-06-04 2001-06-04 Porte-broche
US09/965,104 US6702524B2 (en) 2001-06-04 2001-09-26 Broach carrier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2001/017938 WO2002098592A1 (fr) 2001-06-04 2001-06-04 Porte-broche

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/965,104 Continuation US6702524B2 (en) 2001-06-04 2001-09-26 Broach carrier

Publications (1)

Publication Number Publication Date
WO2002098592A1 true WO2002098592A1 (fr) 2002-12-12

Family

ID=21742620

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/017938 WO2002098592A1 (fr) 2001-06-04 2001-06-04 Porte-broche

Country Status (2)

Country Link
GB (1) GB2390992B (fr)
WO (1) WO2002098592A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007032728A1 (fr) * 2005-09-16 2007-03-22 Seco Tool Ab Outil et insert de brochage
EP2481507A1 (fr) * 2011-02-01 2012-08-01 United Technologies Corporation Dent pour outil de brochage, outil de brochage et procédé de fabrication d'un outil de brochage
CN104368869A (zh) * 2014-11-27 2015-02-25 株洲钻石切削刀具股份有限公司 一种拉削刀具
CN112074367A (zh) * 2018-04-13 2020-12-11 埃金公司 用于拉床的拉刀

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US545739A (en) * 1895-09-03 William shaw
US593028A (en) * 1897-11-02 File or rasp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2585832A (en) * 1949-07-06 1952-02-12 Lapointe Machine Tool Co Surface broach
GB890114A (en) * 1957-08-14 1962-02-28 Weatherley Oilgear Ltd Improvements in broaching tools

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US545739A (en) * 1895-09-03 William shaw
US593028A (en) * 1897-11-02 File or rasp

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007032728A1 (fr) * 2005-09-16 2007-03-22 Seco Tool Ab Outil et insert de brochage
CZ301931B6 (cs) * 2005-09-16 2010-08-04 Seco Tools Ab Protahovací nástroj a protahovací desticka
US8070396B2 (en) 2005-09-16 2011-12-06 Seco Tools Ab Broach tool and a broach insert
EP2481507A1 (fr) * 2011-02-01 2012-08-01 United Technologies Corporation Dent pour outil de brochage, outil de brochage et procédé de fabrication d'un outil de brochage
US8647022B2 (en) 2011-02-01 2014-02-11 United Technologies Corporation Broaching tool
CN104368869A (zh) * 2014-11-27 2015-02-25 株洲钻石切削刀具股份有限公司 一种拉削刀具
CN112074367A (zh) * 2018-04-13 2020-12-11 埃金公司 用于拉床的拉刀

Also Published As

Publication number Publication date
GB2390992B (en) 2004-11-17
GB0327463D0 (en) 2003-12-31
GB2390992A (en) 2004-01-28

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