CN1129415A - Milling cutter with insert adapter - Google Patents

Milling cutter with insert adapter Download PDF

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Publication number
CN1129415A
CN1129415A CN94193101A CN94193101A CN1129415A CN 1129415 A CN1129415 A CN 1129415A CN 94193101 A CN94193101 A CN 94193101A CN 94193101 A CN94193101 A CN 94193101A CN 1129415 A CN1129415 A CN 1129415A
Authority
CN
China
Prior art keywords
cutting tip
blade bearing
connector
mill body
milling cutter
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.)
Pending
Application number
CN94193101A
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Chinese (zh)
Inventor
罗伯特·米切尔
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.)
Kennametal Inc
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Publication of CN1129415A publication Critical patent/CN1129415A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2265—Securing arrangements for bits or teeth or cutting inserts by means of a wedge
    • B23C5/2278—Securing arrangements for bits or teeth or cutting inserts by means of a wedge for plate-like cutting inserts fitted on an intermediate carrier, e.g. shank fixed in the cutter body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/202—Plate-like cutting inserts with special form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/04—Overall shape
    • B23C2200/0422—Octagonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/201—Details of the nose radius and immediately surrounding areas

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Shovels (AREA)

Abstract

A milling cutter is capable of receiving replaceable cutting inserts of different shapes and sizes. The milling cutter comprises a generally cylindrical cutter body . A plurality of insert seats are formed about the outer periphery of the cutter body . Each insert seat is adapted to receive either a cutting insert of a first predetermined size and shape or an adapter . The adapter includes a second insert seat for receiving a cutting insert of a second predetermined shape and size. Clamping means are mounted on the cutter body and are operable to clamp the cutting insert of said first predetermined size and shape in the insert seat of the cutter body , or to clamp a cutting insert of a second predetermined size and shape in the insert seat of the adapter .

Description

Milling cutter with insert adapter
The present invention relates to a kind of milling cutter with changeable blade, more particularly, relate to such milling cutter, it has a removable connector, is used to install the blade of difformity and size.
Typical cutting plate for milling cutters comprises a columniform body, and its excircle has one group of groove or recess.Each groove forms a blade bearing, is used for fixing a removable cutting tip.Cutting tip has and is one or morely milling the cutting edge that adds the engagement of man-hour and workpiece.When cutting tip wearing and tearing or damage, can change a new blade.
Such milling cutter is only for the cutting tip that is used to install and be fixed with preliminary dimension and shape.So, must preserve an independent end mill body for the cutting tip of each required difformity and size.Because the end mill body expensive component that is milling cutter itself is so it is expensive preserving a large amount of end mill bodies for dissimilar blades.
In addition, add man-hour milling, the surface around the end mill body upper slitter bar is damaged sometimes.When blade broke, the damage of blade bearing can take place usually.If these damaged surfaces just need to change whole end mill body.
In the past,, adopt replaceable chuck or toolframe for cutting tip is installed on the milling cutter.On chuck or toolframe, be formed with blade bearing and be used for fixing cutting tip.Milling cutter with replaceable chuck is disclosed in the United States Patent (USP) NO.5 of Dunklau, 033,916; The United States Patent (USP) NO.4 of Dickin-son, 566,826; The United States Patent (USP) NO.5 of Mitchell, 102,268; With the United States Patent (USP) NO.3 of Lovendahl, 739,442.The milling cutter of these types requires to use removable chuck, and if do not have this chuck, cutting tip just can not be installed on the end mill body.
An object of the present invention is to provide a kind of milling cutter, it can install and fix the cutting tip of many different sizes and shape.
Another object of the present invention provides a kind of connector of milling cutter, and except first cutting tip of first preliminary dimension and shape, it also makes the milling cutter physical efficiency be mounted to less the cutting tip of a kind of other difformities and size.
Another object of the present invention provides a kind of connector of milling cutter, and it has eliminated the danger that damages milling cutter because cutter breaks.
Another object of the present invention provides a kind of connector of milling cutter, and it can change more conveniently, and cutting tip is located exactly.
The invention provides a kind of milling cutter, it can install and fix the cutting tip of multiple shape and size.Milling cutter comprises the end mill body of a substantial cylindrical, and one group of groove is arranged in its neighboring.Each groove comprises a bottom and pair of sidewalls.On the sidewall that one first is formed at each groove, be used to install the cutting tip of one first preliminary dimension and shape.A connector also can be installed in first blade bearing of end mill body.Connector comprises one second blade bearing, is used to be equipped with the cutting tip of second preliminary dimension and shape.In the groove of end mill body, be provided with a wedge shape fixture block, be used for cutting tip is clamped in its corresponding groove.
Connector can make end mill body be used for the blade of one group of difformity and size.By changing connector simply, milling cutter can be converted and use dissimilar blades.In addition, when cutting tip broke, connector provided protection to end mill body, and avoided the damage of end mill body.
Present invention is described below by embodiment and with reference to accompanying drawing.
Fig. 1 is the perspective view of milling cutter of the present invention;
Fig. 2 is the side view of milling cutter;
Fig. 3 is the thin portion perspective view of milling cutter, has shown the blade bearing in the end mill body;
Fig. 4 is the cutaway view by the groove of end mill body;
Fig. 5-the 8th, perspective view has shown various types of connectors.
With reference to accompanying drawing, Fig. 1 particularly, milling cutter of the present invention is by generally by label 10 expressions.Milling cutter 10 comprises that one is generally 12, one groups of connectors 40 of columniform end mill body and is contained on the circumference of end mill body 12, is used for installing and fixing cutting tip 70.
End mill body 12 has an axial hole 14, is used for end mill body 12 is contained in wholeheartedly mandrel connector (not shown).The axle connector typically comprises a tapered rear, and it is contained in the bellmouth of cutter arbour.By the big spiral that screws in axle connector end end mill body typically is fixed on the axle connector.Because the axle connector is known for a person skilled in the art, so omitted description here to it.
End mill body 12 has one group of groove 16 (Fig. 2) at interval along its neighboring.Each groove 16 has flat bottom 18 and pair of sidewalls 20 and 22.Sidewall 20 and 22 diverges to mutually a little from groove 16 bottoms 18.Each groove 16 is axially angled at forward with respect to end mill body, and radially angled at negative sense with respect to end mill body.This is known in the milling cutter technology.If describe in another way, the wall 20,22 and 26 of blade bearing 24 is angled, so that when each cutting tip 70 was contained in the blade bearing 24, leading edge 78 was angled to the rotation direction of end mill body 12 on it.The end face 72 that this is actual to be meant cutting tip 70 is in one slightly upwards and on end mill body 12 direction of motion plane inclined.Certainly, this is meant that the cutting limit 78 (Fig. 4) of going up of cutting tip 70 is in its base portion the place ahead when installing.This forms known in the art one a just axial inclination angle and a negative radial inclination angle in the ordinary way, and this has formed how much of known shearing inclinations again.
Common recessed blade bearing with label 24 (Fig. 3) expression is arranged on the sidewall 20 of each groove 16.Blade bearing 24 comprises a rear wall 26 and pair of sidewalls 28 and 30.Rear wall 26 is parallel with the sidewall 20 of groove 16, and comprises a screw 36, is used for fixing connector, and this will describe in detail in the back.Sidewall 28 and 30 extends from rear wall 26 in the mode of approximate vertical, and the setting that roughly meets at right angles mutually.Sidewall 28 and 30 respectively be included in groove 16 sidewalls 20 intersections near inclined-plane 32.Each sidewall 28 and 30 and the intersection place of rear wall 26 also form bight 34, a back.
Be suitable for installing the cutting tip 70 of one first preliminary dimension and shape at the blade bearing 24 of end mill body 12.Cutting tip 70 typically comprises an end face 72, one bottom surfaces 74, and the sidewall 76 that extends between end face 72 and bottom surface 74.Sidewall 76 forms one or more cuttings limit 78 with the intersection of end face 72.Typically, sidewall 76 tilts, and is in an acute angle with the planar shaped of end face 72.
Cutting tip 70 can directly be contained in the blade bearing 24, and its bottom surface 74 leans against on the rear wall 26 of blade bearing 24.In this occupation mode, cutting tip 70 is square, and four sidewalls 76 are arranged.Blade bearing 24 has two sidewalls 28 and 30 to engage with two sidewalls 76 of cutting tip 70.When 78 wearing and tearing of cutting limit, can make different cutting limits 78 towards workpiece cutting tip 70 transpositions.Be appreciated that and cutting tip 70 can be directly installed on the blade bearing 24, and do not need connector.
For the cutting tip 70 that adapts to difformity and size, a connector 40 can be installed in the blade bearing 24.Each connector comprises a bottom surface 42 and an end face 44.End face 44 comprises one second blade bearing 46, is used to install and blade bearing 24 difformities of end mill body 12 and/or the cutting tip 70 of size.Blade bearing 46 comprises an insert supporting face 48 and one or more sidewall 50.One through hole 52 extends through connector 40 to the bottom surface 42 from bearing-surface 48.Through hole 52 is aimed at the screw 36 on the end mill body 12.One hold-down screw 54 passes through hole 52, and with screw 36 engagement of end mill body, so that connector 40 is fixed in the blade bearing 24 of end mill body 12.
By a wedge shape clamping device 60 cutting tip 70 is fixed in the connector 40.Wedge shape clamping device 60 in described embodiment comprises a wedge shape fixture block 62 and a wedge shape fixture block adjuster 64.Wedge shape fixture block 62 comprises first and second lozenges 62a and the 62b.Lozenges 62a is suitable for the wall 22 opposite with groove 16 and blade bearing 24 and engages.Lozenges 62b is suitable for engaging with the end face 72 of cutting tip 70.
Wedge shape fixture block adjuster 64 is differential screw rods, at the first end 64a right-hand thread is arranged, and at the second end 64b left-hand thread is arranged.First screw 66 of the first end 64a and groove 16 bottoms 18 is used screw-threaded engagement.Second end 64b of wedge shape fixture block adjuster 64 and second screw 68 on the wedge shape fixture block 62 are used screw-threaded engagement.The second end 64b has a recess, can mesh and rotate.When wedge shape fixture block adjuster 64 when first direction rotates, wedge shape fixture block 62 moves down in groove 16, and cutting tip 70 is fixed in the connector 40.Wedge shape fixture block 62 also can be used for directly will having the cutting tip 70 of first preliminary dimension and shape to be clamped in the blade bearing 24 of end mill body 12.When wedge shape fixture block adjuster 64 when a rightabout rotates, the wedge shape fixture block moves up in groove 16, unclamps cutting tip 70 therefrom.
In application, milling cutter can use one as shown in Figure 5 first preliminary dimension and the blade of shape.The size of the cutting tip 70 of Fig. 5 is suitable for being contained in the blade bearing 24 of end mill body 12.In a common use, one has the pad S at an end face 100 and a back side 102 to be arranged between the bearing-surface 26 of cutting tip 70 and blade bearing 24.Pad S comprises a screwed hole 53.Pad S is fixed in the blade bearing 24 with screwing in screw 36 by making screw 54 pass screw 53.The bottom surface 74 of cutting tip 70 leans against on the end face of pad S.Two sides 76 lean against respectively on the inclined-plane 32 of blade bearing 24.By wedge shape fixture block 62 cutting tip among Fig. 5 70 is fixed in the blade bearing 24.
By the difform connector 40 shown in Fig. 6-8, can make end mill body 12 use the cutting tip 70 of many other shape and size.Fig. 6 has shown a connector that is used to install square cutting tip 70.Fig. 7 has shown that one is used for the connector of octagonal blade.Fig. 8 has shown that one is used for the connector of circular shear blade.
Referring to Fig. 6, connector 40 (also being shown in Fig. 3) is used for installing and supporting square cutting tip 70.Connector 40 comprises a blade bearing 46, and it has pair of angled side walls 50.Cutting tip 70 is contained in the blade bearing 46, and its back side 74 leans against on the bearing-surface 48.Two sidewalls 76 of cutting tip 70 lean against on the sidewall 50 of connector 40.Wedge shape fixture block 62 (Fig. 3) is fixing with cutting tip 70.
Shown another kind of different connector 40a among Fig. 7, comprised that one has the blade bearing 46a of an one-sided wall 50a.More particularly, the structure of the connector 48 that shows of Fig. 7 connector shown in the corresponding diagram 3 and 6 40 roughly.In this respect, should be noted that connector 40a comprises a bottom surface 42a and an end face 44a.Octagonal cutting tip 70a is contained on the blade bearing 46a, and bottom surface 74a leans against on the bearing-surface 48a.A sidewall 76a leans against on the sidewall 50a of connector 40a.
Fig. 8 has shown another kind of connector 40b, and it is suitable for installing and fixing the blade 70b of a circle.Circular shear blade 70b comprises a front 72b, a back side 74b and justify an or curved wall 76b.Connector 40b comprises a blade bearing 46b, and it has a bottom surface 42b and an end face 44b.Blade bearing 46b comprises an insert supporting face 48b and pair of sidewalls 50b.One screw 52b is arranged on the connector 40b, be used to hold screw 54.In use, circular shear blade 70b is contained among the blade bearing 46b, and its sidewall 76b engages with each sidewall 50b in tangent mode.
Connector 40 shown in Fig. 6-8 has only been represented several embodiment.The accurate shape that is appreciated that connector will be decided according to the geometry of the cutting tip that will be installed in this place.In addition, in many cases, can design connector 40 and make it adapt to more multi-form blade.
As mentioned above, milling cutter of the present invention can provide a method easily, is contained on the end mill body with the cutting tip with difformity and size.It provides the connector on a kind of blade bearing that can be contained in end mill body.Connector has one second blade bearing, can hold the cutting tip of second preliminary dimension and shape.Because end mill body of the present invention can be used many dissimilar blades, so, just do not need to preserve the end mill body that is used for different blades in a large number.
The present invention can have many modification, all among spiritual scope of the present invention.

Claims (12)

1. a milling cutter can be installed the replaceable cutting inserts of difformity and size, comprising:
(A) end mill body of a substantial cylindrical;
(B) at least one groove is formed on the excircle of end mill body, and described groove has a bottom and pair of sidewalls;
(C) first blade bearing that is formed in the groove is used to install first cutting tip of first preliminary dimension and shape, or a connector is installed;
(D) a connector can insert first blade bearing of described end mill body, and comprises one second blade bearing, is used to install second cutting tip of second preliminary dimension and shape;
(E) fixture is used for described connector is fixed on first blade bearing of described end mill body;
(F) fixture block is used for described first cutting tip is clamped in first blade bearing, and second cutting tip is clamped in second blade bearing of described connector.
2. milling cutter as claimed in claim 1 is characterized in that: described clamping device comprises a wedge shape fixture block and a wedge shape fixture block adjuster.
3. milling cutter as claimed in claim 2 is characterized in that: described wedge shape fixture block comprises a first surface that can engage with an opposite side sidewall with blade bearing of described groove and the second surface that can engage with the cutting tip end face.
4. milling cutter as claimed in claim 2 is characterized in that: described wedge shape fixture block adjuster comprises a screw rod, the one end can with the hole screw-threaded engagement in the end mill body.
5. milling cutter as claimed in claim 2 is characterized in that: described wedge shape fixture block adjuster comprises a differential screw rod, and two opposite thread heads are arranged, first screw engagement of an end and described end mill body, second screw engagement in the other end and the described wedge shape fixture block.
6. milling cutter as claimed in claim 1 is characterized in that: described fixture comprises a hold-down screw.
7. a milling cutter can be installed the replaceable cutting inserts of difformity and size, comprising:
(A) end mill body of a substantial cylindrical, it has a neighboring;
(B) one group of blade bearing is used to install the cutting tip of formed first preliminary dimension and shape, or is installed in the connector in the end mill body neighboring;
(C) one group of connector can insert in the end mill body in the respective blade seat, and each connector has second blade bearing that forms thereon, is used to install the cutting tip of second preliminary dimension and shape;
(D) be used for described connector is fixed on fixture in its respective blade seat of end mill body;
(E) clamping device is used for being clamped in first cutting tip of first preliminary dimension of described first blade bearing and shape and is clamped in second preliminary dimension in second blade bearing of described connector and second cutting tip of shape.
8. milling cutter as claimed in claim 7 is characterized in that: described clamping device comprises a wedge shape fixture block and a wedge shape fixture block adjuster.
9. milling cutter as claimed in claim 8 is characterized in that: described wedge shape fixture block adjuster comprises a screw rod, the hole screw-threaded engagement in one end and the end mill body.
10. milling cutter as claimed in claim 8, it is characterized in that: described wedge shape fixture block adjuster comprises a differential screw rod, the end that two opposite threads are arranged, the engagement of first screw in an end and the described end mill body, the other end is meshed with second screw in the described wedge shape fixture block.
11. the cutting tip with difformity and size is installed in the method on the milling cutter, and one group of first blade bearing arranged on the milling cutter neighboring, is used to install the cutting tip of first preliminary dimension and shape, comprising:
(A) connector device that one second blade bearing will be arranged is in first blade bearing of described end mill body, and wherein, described second blade bearing is suitable for installing the cutting tip of second preliminary dimension and shape;
(B) described connector is fixed in described first blade bearing of described end mill body;
(C) cutting tip with described second preliminary dimension and shape is contained in described second blade bearing of described connector;
(D) described cutting tip is clamped in described second blade bearing.
12. method as claimed in claim 11, it is characterized in that: the step that the cutting tip of described second preliminary dimension and shape is clamped in described connector comprises the step that engages with second cutting tip with a fixture block, is fixed in the connector with second blade with second preliminary dimension and shape.
CN94193101A 1993-08-25 1994-07-11 Milling cutter with insert adapter Pending CN1129415A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11201593A 1993-08-25 1993-08-25
US08/112,015 1993-08-25

Publications (1)

Publication Number Publication Date
CN1129415A true CN1129415A (en) 1996-08-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN94193101A Pending CN1129415A (en) 1993-08-25 1994-07-11 Milling cutter with insert adapter

Country Status (10)

Country Link
EP (1) EP0715554A1 (en)
JP (1) JPH08508942A (en)
KR (1) KR960703697A (en)
CN (1) CN1129415A (en)
AU (1) AU7220094A (en)
BR (1) BR9407516A (en)
CA (1) CA2168661A1 (en)
DE (1) DE715554T1 (en)
ES (1) ES2088841T1 (en)
WO (1) WO1995005913A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102120274A (en) * 2010-11-30 2011-07-13 武汉中地博锐超硬材料有限公司 Milling tool
CN102476215A (en) * 2010-11-30 2012-05-30 鸿富锦精密工业（深圳）有限公司 Milling cutter
CN101330999B (en) * 2005-12-16 2012-05-30 科莱碳化物工业有限公司 Gear milling tool with replaceable cutting inserts
CN103624310A (en) * 2012-08-28 2014-03-12 株洲钻石切削刀具股份有限公司 Cutting tool having fly-off prevention structure
CN105772819A (en) * 2016-05-23 2016-07-20 东莞市马记实业有限公司 90-degree chamfering cutter disc
CN106625793A (en) * 2016-12-25 2017-05-10 安徽华天机械股份有限公司 Octagonal circle blade for slitting soft materials containing hard impurities and manufacturing method thereof
CN108057921A (en) * 2016-11-08 2018-05-22 肯纳金属公司 Cutting element and blade clamping means
CN108115187A (en) * 2016-11-28 2018-06-05 天津金源滕博财务咨询有限公司 A kind of cutter blade fixing device
CN109454299A (en) * 2018-11-30 2019-03-12 扬州大学 A kind of profile milling cutter combined molding method and molding cutterhead

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL117015A (en) * 1996-02-02 1998-12-27 Iscar Ltd Cutting tool
IL195601A (en) * 2008-11-30 2013-11-28 Iscar Ltd Clamping mechanism
KR101107444B1 (en) 2009-06-10 2012-01-19 대구텍 유한회사 Cutting tool and cutting insert for the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2077756A1 (en) * 1970-02-11 1971-11-05 Dumas Pierre
GB1414775A (en) * 1971-12-18 1975-11-19 Wickman Wimet Ltd Milling cutters
US4493594A (en) * 1979-06-19 1985-01-15 Santrade Ltd. Milling cutter

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101330999B (en) * 2005-12-16 2012-05-30 科莱碳化物工业有限公司 Gear milling tool with replaceable cutting inserts
CN102120274A (en) * 2010-11-30 2011-07-13 武汉中地博锐超硬材料有限公司 Milling tool
CN102476215A (en) * 2010-11-30 2012-05-30 鸿富锦精密工业（深圳）有限公司 Milling cutter
CN103624310A (en) * 2012-08-28 2014-03-12 株洲钻石切削刀具股份有限公司 Cutting tool having fly-off prevention structure
CN103624310B (en) * 2012-08-28 2016-12-21 株洲钻石切削刀具股份有限公司 A kind of cutting tool with fly-off prevention structure
CN105772819A (en) * 2016-05-23 2016-07-20 东莞市马记实业有限公司 90-degree chamfering cutter disc
CN108057921A (en) * 2016-11-08 2018-05-22 肯纳金属公司 Cutting element and blade clamping means
CN108115187A (en) * 2016-11-28 2018-06-05 天津金源滕博财务咨询有限公司 A kind of cutter blade fixing device
CN106625793A (en) * 2016-12-25 2017-05-10 安徽华天机械股份有限公司 Octagonal circle blade for slitting soft materials containing hard impurities and manufacturing method thereof
CN106625793B (en) * 2016-12-25 2020-05-05 安徽华天机械股份有限公司 Octagonal round blade for cutting soft material containing hard impurities and manufacturing method thereof
CN109454299A (en) * 2018-11-30 2019-03-12 扬州大学 A kind of profile milling cutter combined molding method and molding cutterhead
CN109454299B (en) * 2018-11-30 2020-06-19 扬州大学 Combined forming method and forming cutter head for formed milling cutter

Also Published As

Publication number Publication date
JPH08508942A (en) 1996-09-24
EP0715554A1 (en) 1996-06-12
ES2088841T1 (en) 1996-10-01
AU7220094A (en) 1995-03-21
WO1995005913A1 (en) 1995-03-02
BR9407516A (en) 1997-01-07
KR960703697A (en) 1996-08-31
CA2168661A1 (en) 1995-03-02
DE715554T1 (en) 1996-11-28

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