1. Internal broaching machines

1.1 Horizontal machines

Simple in design, these machines are the result of early construction. They are hardly ever made anymore, except for general mechanical purposes or for very special broaching operations, such as long workpieces. In general, as shown in figure 1 , the machine is designed around a horizontal working axis. The lower part of the main frame rests on the floor, while the upper part, forming a cavity, accommodates the workstation with vertical support for the workpiece to be broached. This is followed by the broach drive unit, with the attachment head usually connected to a hydraulic cylinder. These machines are not fitted with any special equipment,...