Method for making a pressure-tight attachment of an elastomeric tubular piece to a connecting part
First Claim
1. A method for force-tightly attaching a tubular piece made of elastomeric material to a connecting part, the method comprising the steps of:
- pushing an open end of said tubular piece onto said connecting part so that a pushed on end region of said tubular piece is on said connecting part;
positioning a metal clamping ring around said tubular piece at the pushed on end region thereof;
radially applying a clamping force (K) during a clamping operation to said clamping ring to reduce the diameter of said clamping ring and thereby tightly clamping said tubular piece on said connecting part;
detecting the radial clamping force developed during the clamping operation between said clamping ring and said tubular piece;
observing and measuring a force/displacement curve during said clamping operation; and
, utilizing a characteristic feature of maid force/displacement curve as a basis for a criterion for switching off the application of said clamping force.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention is directed to a method for making a pressure-tight attachment of an elastomeric tubular piece to an attachment part. For making the pressure-tight attachment, an open end of a tubular piece made of elastomeric material is pushed onto a connecting part and a metal clamping ring is positioned thereon. While radially pressing the jaws of the clamping device together, the diameter of the clamping ring is reduced and the tubular piece is thereby tightly clamped to the connecting part. The clamping operation is ended before damage occurs but only when an adequate strength is ensured. During clamping, the force/displacement curve is observed and a characteristic feature of the measured curve is used as a basis of computation for a switchoff criterion. Preferably, the clamping operation is only ended when the clamping force begins to drop for the first time after the maximum force is exceeded in a defined manner in a predetermined localized or bounded curve segment. The method of the invention is especially for attaching a resilient member to a cover and/or to a roll-off piston of an air spring of a motor vehicle.
8 Citations
8 Claims
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1. A method for force-tightly attaching a tubular piece made of elastomeric material to a connecting part, the method comprising the steps of:
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pushing an open end of said tubular piece onto said connecting part so that a pushed on end region of said tubular piece is on said connecting part;
positioning a metal clamping ring around said tubular piece at the pushed on end region thereof;
radially applying a clamping force (K) during a clamping operation to said clamping ring to reduce the diameter of said clamping ring and thereby tightly clamping said tubular piece on said connecting part;
detecting the radial clamping force developed during the clamping operation between said clamping ring and said tubular piece;
observing and measuring a force/displacement curve during said clamping operation; and
,utilizing a characteristic feature of maid force/displacement curve as a basis for a criterion for switching off the application of said clamping force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification