Automatic machining system

An automatic machining system comprising:

• a head unit having a combined scribing/punching tool or drill chuck, means for positioning said tool or drill chuck in the direction of the Z axis and a driving unit for rotating said chuck in drilling a workpiece;
• a sensor which, when subjected to pressure from the tool or drill mounted in said chuck according to the back component of force which said tool or drill receives from said workpiece when the tip of said tool or drill comes into contact with said workpiece, generates an electric signal to detect said contact and senses the variation thereof;
• a travel distance control unit responsive to a detection signal from said sensor for controling the travel distance of the tool or drill of said head unit in the Z axis direction in accordance with the requirement of the scribing, punching or drilling operation;
• an X-Y driving unit for moving and positioning said head unit in the respective directions of the X and Y axes to vary the machining position of the head unit;
• means for securely fixing said workpiece on a work table;
• a memory unit for memorizing various data;
• an operating unit which selects one out of the scribing, punching and drilling functions for said head unit, chooses a working pattern and feeds said memory unit with machining data including the X and Y coordinates for moving said head unit and the external dimensions and drilling depth of the workpiece;
• a display unit on whose screen the picture varies with the working condition of said operating unit and the machining data fed from said operating unit to said memory unit as well as the operating instruction and the kinds of data such as said X and Y coordinates and the radius to be next given as input to said operating unit are indicated;
• a pattern display unit on which the respective working patterns corresponding to the modes of said scribing, punching and drilling, and all the symbols in which the machining data to be fed from the operating unit to said memory unit are to be indicated are displayed in advance and the working pattern selected by the operating unit is separately indicated as express instruction to an operator;
• and a control unit for controlling each of the above-mentioned means in accordance with said machining data input from the operating unit to the memory unit.