Brother Kogyo Kabushiki-Kaisha

Koichi Asakura

Shouki Yasuda

Takenori Matsumoto

Makoto Demura

A method for preparing numerical control data for a machine tool by displaying various kinds of operation information on a display for causing data necessary for preparing the numerical control data to be inputted and by inputting the data in accordance with the displayed information, comprising the steps of selecting a working operation input screen for inputting working operations in accordance with first indications on the display, inputting working operations at the selected working operation input screen, selecting a working program input screen for inputting working programs, and inputting data in accordance with second indications of input items required for working operations, the second indications being displayed on the display by reading inputted working operations. As a result, a series of working programs are inputted to prepare the numerical control data.

Method for preparing numerical control data for a machine tool

A thread cutting machine is provided with a control system in which, according to one aspect, the rotation of the spindle is controlled in the synchronous manner following up the feed amount of the spindle head and the rotation instruction is computed in accordance with the feed deviation, In another aspect, the feed of the spindle head is controlled in the synchronous manner following up the rotation of the spindle and the feed instruction is computed in accordance with the rotation deviation. In a further aspect, the rotation instruction is operated in accordance with the feed speed and the feed acceleration. In still a further aspect, the feed instruction is computed in accordance with the rotation speed and the rotation acceleration. In the preferred embodiments disclosed herein, the synchronism between the rotation of the spindle and the feed of the spindle head can be remarkably improved with various control modes, thus achieving the high speed thread cutting working with high accuracy.

Thread cutting machine with synchronized feed and rotation motors

A machine tool includes a plurality of storage means for storing preworking steps, tool information, and a working program for a large variety of working operations to be performed or workpieces of various shapes and materials. An operation control means determines from an operator the shape and material of a workpiece to be machined and then accesses the stored information to identify the tools necessary, the sequence of tool use, and the specific working operations to be performed to accomplish the desired machining.

Machine tool with tool selection and work sequence determination

A machine tool for machining a workpiece by feeding a cutting tool into the workpiece in a series of discrete steps wherein a constant value is stored for each of those steps, a calculation is performed responsive to the value of a variable factor affecting operation of the cutting tool, such as cutting tool diameter and/or workpiece material coefficient, to calculate for each of the discrete steps a feed value as a function of the corresponding constant value for that step and as a function of the value of that factor. Control means is provided for feeding the cutting tool into the workpiece as a function of the feed values thus calculated for a plurality of steps. Upon completion of feeding for any one step, the cutting tool is at least partially withdrawn from the workpiece and the cutting tool is subsequently feed into the workpiece as a function of the feed value of the next step.

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Aichi, Japan

Koichi Asakura