Punching apparatus

Abstract

A punching apparatus comprises a tool holder unit (20) rotatable around a working axis (X) and provided with a plurality of seats (21) suitable for slidably housing respective punching tools (10), a beating element (2) movable along and around the working axis (X) and provided with an operating end (7) having a beating portion (8), to selectively interact with a set punching tool (10), first driving means (3) for moving the beating element (2) along the working axis (X) so as to move set punching tool (10) and second driving means (4) for rotating the tool holder unit (20) around the working axis (X); the operating end (7) of the beating element (2) comprises a first coupling element (9) and the tool holder unit (20) comprises a plurality of second coupling elements (22) each of which is associated with a respective seat (21) and arranged to couple with the first coupling element (9) in a connection configuration (F) in which the beating element (2) and the tool holder unit (20) are coupled and rigidly rotate; the second driving means (4) in a selection configuration (E) rotates the tool holder unit (20) for positioning the set punching tool (10) so that the latter faces the beating portion (8) of the operating end (7) and allows the first coupling element (9) to couple with the second coupling element (22) that is associated with the seat (21) of the set punching tool (10) and, in the connection configuration (F), rotates the tool holder unit (20) and the beating element (2) which are mutually connected for angularly orienting the set punching tool (10).

Description

technical field [0001] The invention relates to machine tools for machining workpieces and / or sheet metal, and in particular to a punching device associated with a punching machine for performing cutting and / or punching. Background technique [0002] Known punching machines are provided with a punching device called a punching head, which supports and moves a punching tool along a working axis, which punching tool acts on a workpiece, usually a sheet metal, It cooperates with the lower punching die or counter-punch. Typically, the die is fixed to the table of the punching machine, which supports the workpiece to be machined. [0003] In stamping heads with a single tool, the latter, ie the single tool, is mounted on a support element (a so-called mandrel) which is driven linearly along and around the working axis by means of a corresponding actuator driven in rotation. Linear movements in two opposite directions along the working axis allow to carry out the working stroke...

AI Technical Summary

Problems solved by technology

[0014] A disadvantage of existing multi-tool punching devices with fixed or rotating punches, with a single tool holder arrangement or with multiple tool holder arrangements (multiple punches) is that they require three separate actuators for for moving the ram and for selecting and angularly orienting the punching tool

The three actuators and the corresponding transmission mechanisms are usually complex, with associated dimensions and high costs

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