Chuck

A chuck and disk body technology, applied in the directions of large fixed members, clamping, and support, can solve the problems of inability to automate and lose accuracy, and achieve the effect of small simplicity, avoidance of bending, and avoidance of loss of accuracy
CN104907840BInactive Publication Date: 2018-08-28ROHM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ROHM CO LTD
Publication Date
2018-08-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a spannfutter, for clamping thin-wall type workpieces, including a body, which may be adjusted between the first rotation position at the upper side of a processing workpiece and the second rotation position at the lower side of a processing workpiece; a workpiece bracket arranged to the body, which has a hole as an inlet getting to the lower side of the workpiece; and at least two clamp splices which are supported on the body and adjusted with respect to the workpiece bracket. A workpiece structural support is provided, being adjusted between a first position for supporting the lower side of the workpiece in the first rotation position and a second position for supporting the upper side of the workpiece in the second rotation position, having at least one pinion for realizing rotational coupling through a provided adjustable piston with dentitions, arranged in a cylindrical cavity and adjusted via pressure medium in the body.
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Description

technical field

[0001] The invention relates to a chuck for clamping thin-walled workpieces, which has a disc body, a workpiece bracket assigned to the disc body, and at least two chucks that are supported on the disc body and can be adjusted relative to the workpiece bracket. clamp block. Background technique

[0002] Such chucks are known from practice and are provided by the applicant under the designation KPF-MT as force-actuated flat chucks for clamping and subsequent processing of thin-walled workpieces, ie printed circuit boards. Normally, printed circuit boards are processed from both sides, for which the workpiece is turned. For this purpose, counterbore holes are inserted in the printed circuit board, into which pins are introduced, with a slight interference in order to ensure sufficient precision. Loading with grippers is therefore ruled out and cannot be automated. In addition, what is considered a special defect is the loss of accuracy in processing. Conte...

Claims

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