[특허]Method and forming machine for working a workpiece

Massee,Johan

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Method and forming machine for working a workpiece

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B21D-022/00
미국특허분류(USC)	072/084; 072/115; 072/117; 072/125
출원번호	US-0890931 (2004-07-14)
우선권정보	NL-1020171(2002-03-13)
발명자 / 주소	Massee,Johan
출원인 / 주소	Massee,Johan
대리인 / 주소	Westman, Champlin &
인용정보	피인용 횟수 : 2 인용 특허 : 32

초록
▼

The invention relates to a method and a forming machine for working a workpiece, for example by deforming it or fixing it in another workpiece, in which the workpiece is fitted over a mandrel, at least a part of the mandrel is expanded so as to fix the workpiece, the workpiece and at least one tool, such as a forming roller, are rotated about an axis relative to each other and the workpiece is worked by means of said tool. Less than half of the expanded or expandable part of the mandrel engages portions of the workpiece that are being worked with the too...

대표
청구항
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What is claimed is: 1. A method for working a workpiece, in which: the workpiece is fitted over a mandrel, at least a part of the mandrel is expandable and is expanded so as to fix the workpiece; the workpiece and one or more tools are rotated about an axis relative to each other and the workpiece is worked by means of said tool; and wherein less than half of the expanded or expandable part of the mandrel engages portions of the workpiece that are being worked with the tool. 2. The method according to claim 1, wherein the expanded part of the mandrel remains substantially clear of those portions of the workpiece that are being worked. 3. The method according to claim 1, wherein the first-mentioned workpiece is inserted into a second workpiece, said second workpiece is deformed by means of the tool, thus fixing the first-mentioned workpiece in the second workpiece. 4. The method according to claim 3, wherein a central axis of the mandrel extends at an angle to and/or is positioned eccentrically with respect to the central axis of the second workpiece. 5. The method according to claim 1, wherein the workpiece is pressed into abutment with a stop on the mandrel. 6. The method of claim 1 wherein said at least part of the mandrel comprises at least one bracket arranged along a circumference of the mandrel and being rotatable about a point between its ends, and wherein expanding the mandrel comprises rotating said at least one bracket so as to fix the workpiece. 7. A forming machine for working a workpiece, comprising: an at least partially expandable mandrel for fixing the workpiece; at least one tool for working the workpiece; driving means for rotating the workpiece and the tool relative to each other about an axis; and wherein the mandrel is adapted to the workpiece in such a manner that less than half of the expandable part of the mandrel engages portions of the workpiece that are being worked with the tool. 8. The forming machine according to claim 7, wherein the expandable part has been adapted to the workpiece in such a manner that the expandable part of the mandrel remains substantially clear of those portions of the workpiece that are being worked. 9. The forming machine according to claim 7, which moreover comprises a chuck for a second workpiece. 10. The forming machine according claim 7, wherein the central axis of the mandrel extends at an angle to and/or is positioned eccentrically with respect to the central axis of the chuck for the second workpiece. 11. The forming machine claim 7, wherein said mandrel is provided with a stop for the workpiece. 12. The forming machine of claim 7 wherein said at least partially expandable mandrel comprises at least one bracket arranged along a circumference of the mandrel, the at least one bracket being rotatable about a point between its ends. 13. The forming machine according to claim 12 wherein said at least partially expandable mandrel comprises a set of brackets arranged along a circumference of the mandrel, each of the brackets being rotatable about a point between its ends. 14. The forming machine according to claim 13 wherein the mandrel includes a stamp adapted to drive the set of brackets. 15. The forming machine according to claim 14 wherein the mandrel includes an axial bore wherein the stamp is axially displaceable in the bore. 16. The forming machine according to claim 12 wherein the mandrel includes a stamp adapted to drive the at least one bracket. 17. The forming machine according to claim 16 wherein the mandrel includes an axial bore wherein the stamp is axially displaceable in the bore. 18. A method for working a workpiece, comprising: fitting the workpiece over a mandrel wherein fitting includes abutting the workpiece with a stop of the mandrel to obtain a desired axial position of the workpiece on the mandrel; expanding at least a part of the mandrel so as to fix the workpiece thereon; rotating at least one of the workpiece and a tool relative to each other about an axis; and working a portion of the workpiece with the tool wherein the expanded part of the mandrel remains substantially clear of those portions of the workpiece that are being worked. 19. The method of claim 18 and further comprising inserting the first-mentioned workpiece into a second workpiece; and wherein working comprises deforming a portion of the second workpiece with the tool to couple the first-mentioned workpiece with the second workpiece. 20. The method of claim 18 wherein said at least part of the mandrel comprises at least one bracket arranged along a circumference of the mandrel and being rotatable about a point between its ends, and wherein expanding the mandrel comprises rotating said at least one bracket so as to fix the workpiece. 21. A forming machine for working a workpiece, the forming machine comprising: a tool adapted to perform work on a workpiece; a mandrel having an at least partially expandable part adapted to hold the workpiece fixed to the mandrel, and a stop adapted to engage the workpiece to obtain a desired axial position of the workpiece on the mandrel, wherein the tool is disposed relative to the mandrel such that the expandable part of the mandrel remains substantially clear of portions of the workpiece that are being worked; and a drive coupled to at least one of the mandrel and the tool and adapted to rotate at least one of the mandrel and the tool relative to each other about an axis. 22. The forming machine according claim 21, wherein the central axis of the mandrel extends at an angle to and/or is positioned eccentrically with respect to the central axis of the chuck for the second workpiece. 23. The forming machine according to claim 22, and further comprising a chuck for a second workpiece. 24. The forming machine of claim 22 wherein said at least partially expandable part of the mandrel comprises at least one bracket arranged along a circumference of the mandrel, the at least one bracket being rotatable about a point between its ends. 25. The forming machine according to claim 22 wherein said at least partially expandable part of the mandrel includes a set of brackets arranged along a circumference of the mandrel, each of the brackets being rotatable about a point between its ends. 26. The forming machine according to claim 25 wherein the mandrel includes a stamp adapted to drive the set of brackets.

인용문헌 (32)

이 특허를 인용한 특허 (2)

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Method and forming machine for working a workpiece

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Method and forming machine for working a workpiece

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이 특허를 인용한 특허 (2)

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IPC 상세정보(version : 201201)

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