FASTENING DEVICE AND MACHINE TOOL

To provide a fastening device which can automatically change the magnitude of clamp force for performing rough processing and finish processing of a hollow workpiece.SOLUTION: In a workpiece fixture, a load transmission member is movable between a contact position for transmitting a load from a cyli...

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Bibliographic Details
Main Authors HIRATA KENTO, AKASHI MASAHIRO
Format Patent
LanguageEnglish
Japanese
Published 24.09.2021
Subjects
COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT
DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING
MACHINE TOOLS
MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
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Summary:To provide a fastening device which can automatically change the magnitude of clamp force for performing rough processing and finish processing of a hollow workpiece.SOLUTION: In a workpiece fixture, a load transmission member is movable between a contact position for transmitting a load from a cylindrical section 43 to a pressing member in a state of contacting the pressing member 45 and a non-contact position in a state of non-contact with the pressing member 45. An operation member 51 is used for an operation for moving the load transmission member between the contact position and the non-contact position. The load transmission member is positioned at the contact position in rough processing, and when the cylindrical section is rotated with respect to a rod screw 35, a large first load from the load transmission member is applied to the pressing member. A controller performs movement control of an operation tool in finish processing so as to move the load transmission member from the contact position to the non-contact position. Thereby, the first load from the load transmission member is not applied to the pressing member and the load applied to the pressing member becomes a small second load applied as spring force from a compression spring 47.SELECTED DRAWING: Figure 8 【課題】中空ワークの荒加工及び仕上げ加工を行うためのクランプ力の大きさを自動的に変更できる締め付け装置を提供する。【解決手段】ワーク固定治具において、荷重伝達部材は、押さえ部材４５に接触した状態で筒状部４３からの荷重を押さえ部材に伝達する接触位置と、押さえ部材４５と非接触の状態の非接触位置との間で移動可能である。操作部材５１は、荷重伝達部材を接触位置と非接触位置との間で移動させる操作に用いられる。荒加工時には荷重伝達部材が接触位置にあり、筒状部を棒ネジ３５に対して回転させると、荷重伝達部材から大きな第１荷重が押さえ部材に作用する。コントローラは、仕上げ加工時には、操作工具を移動制御することで、荷重伝達部材を接触位置から非接触位置に移動させる。それにより荷重伝達部材から第１荷重が押さえ部材に作用しなくなり、押さえ部材に作用する荷重は圧縮バネ４７からバネ力として作用する小さな第２荷重になる。【選択図】図８
Bibliography:Application Number: JP20200043393