A broaching unit for rules of die cutters which comprises a supporting structure, for example a frame, a guide of a die cutter rule, and a tool-holding arm equipped with at least one broaching tool is described. The guide defines a sliding surface on which the rule is fed intermittently. The tool-holding arm is mounted on the supporting structure and is susceptible to reciprocating movements with respect to it and with respect to the guide, preferably forward and backwards movements along a transversal direction of the rule, just to intercept the die cutter rule with the broaching tool when the rule is stopped. Advantageously, the tool-holding arm is equipped with at least two broaching tools, for example four tools, and can be oriented with respect to the guide, for example can rotate on itself, to selectively activate one of the broaching tools, i.e. to bring one of the tools into contact with the rule.

A broaching unit for rules of die cutters which comprises a supporting structure, for example a frame, a guide of a die cutter rule, and a tool-holding arm equipped with at least one broaching tool is described. The guide defines a sliding surface on which the rule is fed intermittently. The tool-holding arm is mounted on the supporting structure and is susceptible to reciprocating movements with respect to it and with respect to the guide, preferably forward and backwards movements along a transversal direction of the rule, just to intercept the die cutter rule with the broaching tool when the rule is stopped. Advantageously, the tool-holding arm is equipped with at least two broaching tools, for example four tools, and can be oriented with respect to the guide, for example can rotate on itself, to selectively activate one of the broaching tools, i.e. to bring one of the tools into contact with the rule.

A broaching unit for rules of die cutters which comprises a supporting structure, for example a frame, a guide of a die cutter rule, and a tool-holding arm equipped with at least one broaching tool is described. The guide defines a sliding surface on which the rule is fed intermittently. The tool-holding arm is mounted on the supporting structure and is susceptible to reciprocating movements with respect to it and with respect to the guide, preferably forward and backwards movements along a transversal direction of the rule, just to intercept the die cutter rule with the broaching tool when the rule is stopped. Advantageously, the tool-holding arm is equipped with at least two broaching tools, for example four tools, and can be oriented with respect to the guide, for example can rotate on itself, to selectively activate one of the broaching tools, i.e. to bring one of the tools into contact with the rule.

A broach for a broaching machine is provided, which has a toothed sheet with hard-metal teeth, formed by one or more segments arranged in longitudinal correlation and a sheet-holding support in which the toothed sheet is placed; characterized in that the sheet-holding support has a recess into which a base of the toothed sheet with matching configuration fits, in order to establish mechanical coupling between the two, and in that the sheet-holding support includes tightening means for securing the toothed sheet in position in the sheet-holder.