JPH01165171U

JPH01165171U -

Info

Publication number: JPH01165171U
Application number: JP6286088U
Authority: JP
Priority date: 1988-05-11
Filing date: 1988-05-11
Publication date: 1989-11-17

Description

[Brief explanation of the drawing]

第１図は本考案に係るＮＣプラズマ切断機の制
御装置の回路ブロツク図、第２図は電流値指令回
路の回路ブロツク図、第２Ａ図は周波数のパルス
列ａの状態を示す図、第２Ｂ図は周波数のパルス
列ａ′の状態を示す図、第２図Ｃは電圧信号ｂの
状態を示す図、第２図Ｄは電圧信号ｂ′の状態を
示す図、第３図はＮＣプラズマ切断機の外観斜視
図、第４図は従来のＮＣプラズマ切断機の制御装
置の回路ブロツク図、第５図は切断電流と切断速
度の関係を示すグラフ、第６図は鋭角形状の切断
形状を示す平面図。５は制御部、６はＸ軸モータ、７はＹ軸モータ
、８，９はモータドライブ部、１０はＯＮ／ＯＦ
Ｆ指令回路、１１はプラズマ発生部、１２は電流
値指令回路、１５はパルス発生部、１６はホトカ
プラ、１７は電圧変換部。 Fig. 1 is a circuit block diagram of a control device for an NC plasma cutting machine according to the present invention, Fig. 2 is a circuit block diagram of a current value command circuit, Fig. 2A is a diagram showing the state of a frequency pulse train a, and Fig. 2B is a diagram showing the state of the frequency pulse train a', FIG. 2C is a diagram showing the state of the voltage signal b, FIG. 2D is a diagram showing the state of the voltage signal b', and FIG. 3 is a diagram showing the state of the voltage signal b'. An external perspective view, FIG. 4 is a circuit block diagram of a control device for a conventional NC plasma cutting machine, FIG. 5 is a graph showing the relationship between cutting current and cutting speed, and FIG. 6 is a plan view showing an acute-angled cutting shape. . 5 is a control unit, 6 is an X-axis motor, 7 is a Y-axis motor, 8 and 9 are motor drive units, 10 is ON/OF
F command circuit, 11 is a plasma generation section, 12 is a current value command circuit, 15 is a pulse generation section, 16 is a photocoupler, and 17 is a voltage conversion section.

Claims

[Claims for Utility Model Registration] (1) In a plasma cutting machine that cuts a metal plate into any shape by moving a torch that generates a plasma arc on a numerically controlled X-Y table. , a control unit 5 that performs numerical control and various controls of the X-Y table, and an X-axis motor 6 and a Y
motor drives 8 and 9 that drive the shaft motor 7;
The control unit 5 controls the plasma generation unit 11 which generates plasma by the plasma generation ON/OFF control command circuit 10, and the control unit 5 controls the plasma generation unit 11 to generate plasma according to the moving speed of the torch 1. 1. A control device for an NC plasma cutting machine, comprising a value command circuit 12. (2) In the current value command circuit 12 according to claim 1, in response to a command from the control section 5, the pulse generation section 1
5 generates a pulse train with a frequency proportional to a desired plasma arc current value or a pulse train with an ON/OFF ratio proportional to the plasma arc current value, and converts the pulse train into a voltage by a voltage converter 17 via a photocoupler 16. A control device for an NC pragma cutting machine, characterized in that the circuit is configured such that the output current value of the plasma arc changes according to the input voltage. .