Invention Grant
- Patent Title: Control method for a machine tool and a machine tool
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Application No.: US14407422Application Date: 2013-05-29
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Publication No.: US09987737B2Publication Date: 2018-06-05
- Inventor: Dario Bralla
- Applicant: Hilti Aktiengesellschaft
- Applicant Address: LI Schaan
- Assignee: Hilti Aktiengesellschaft
- Current Assignee: Hilti Aktiengesellschaft
- Current Assignee Address: LI Schaan
- Agency: Crowell & Moring LLP
- Priority: DE102012210101 20120615
- International Application: PCT/EP2013/061042 WO 20130529
- International Announcement: WO2013/186050 WO 20131219
- Main IPC: B25D11/06
- IPC: B25D11/06 ; H01F7/16 ; H02K33/12 ; H02K7/14 ; H01F7/18 ; B25D11/04

Abstract:
A machine tool and control method are disclosed. The machine tool has a tool receptacle which supports a chiseling tool so that it is movable along an axis of movement. A magneto-pneumatic striking mechanism has a primary drive, which is arranged around the axis of movement, and has a first magnetic coil and a second magnetic coil. On the axis of movement within the magnetic coils, the striking mechanism has a striker and riveting head. Furthermore, the striking mechanism has a pneumatic spring which acts on the striker. The control method provides for a pressure sensor which measures the prevailing pressure in the pneumatic spring during a movement of the striker in the direction opposite the striking direction. A controller initiates an acceleration phase at the start of a drop in pressure in the pneumatic spring. The primary drive accelerates the striker in the striking direction during the acceleration phase.
Public/Granted literature
- US20150151419A1 CONTROL METHOD FOR A MACHINE TOOL AND A MACHINE TOOL Public/Granted day:2015-06-04
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