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Method for controlling water cooling process of quenching machine

A process control, quenching machine technology, applied in heat treatment process control, manufacturing tools, heat treatment equipment, etc., can solve problems such as drop, long water spray time, unstable water pressure in low pressure area, etc.

Active Publication Date: 2009-12-16
SHOUGANG CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a quenching machine water cooling process control method, which solves the problems of the existing quenching machine when the thick plate is quenched at low speed, due to the premature opening of the valve in the low pressure area, the setting of the water spray flow rate is too large, and the water spray time is too long , after destroying the water supply balance of the water tower, the water pressure in the low pressure area is unstable and continues to drop, and finally seriously affects the surface quality of the quenched steel plate

Method used

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Embodiment Construction

[0020] figure 1 , figure 2 It is an embodiment of the present invention.

[0021] like figure 1 As shown, add a DP-DP coupler 4, pass it through figure 1 The idle channels of DP network repeater 3 and DP network repeater 5 in the network are connected to PROFIBUS-DP network, so that figure 1 The steel plate tracking PLC1 and the quenching machine PLC2 can exchange data.

[0022] figure 2 It is the modified functional flowchart of the program. The external thick line frame is the hardware part, including PLC, DP-DP coupler, computer operation interface and field equipment controlled by PLC (roller table inverter group, regulating valve, ET station and its next-level grating and fast cutting valve) . The thin line frame contained in the thick line frame of the outer layer is the modified PLC program function block, the main chain point added and the modified WINCC project. The connecting wires without arrows between wire frames include profibus-dp network cables for da...

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Abstract

The invention discloses a method for controlling a water cooling process of a quenching machine, and belongs to the technical field of quenching control. Based on an automatic network constructed by siemens S7-400 PLC, a DP-DP coupler is added in the aspect of hardware, and the DP-DP coupler is connected to a PROFIBUS-DP network through an idle channel of a DP network relay; then, corresponding hardware configuration is carried out in a PLC program and used for signal switching between a steel plate tracking PLC and a quenching PLC; three switching variables are established in the tracking PLC and quenching machine PLC programs respectively, and the three switching variables in the tracking PLC are output variables; the three switching variables in the quenching PLC are input variables; and the on-off states of the three switching variables are sent to the quenching machine PLC by the steel plate tracking PLC through a DP-DP coupler module to control the quenching machine to open corresponding quick switching valves at a low pressure section. The method is applied to controlling the water cooling process of the quenching machine, and greatly relieves the problems that the water supply at the low pressure section is insufficient when the steel plate is quenched at a low speed and the pressure continually declines to influence the surface quality of the quenched steel plate.

Description

technical field [0001] The invention belongs to the technical field of quenching control, and in particular provides a water cooling process control method for a quenching machine, which is applied to the water cooling process control of a quenching machine. In particular, it involves the water spray control of the high and low pressure sections of the roller press continuous cooling and quenching machine. By finely tracking each section from the steel plate to the 3 sections of the low pressure area, the precise switch control of the fast-cut valves of each water line in the corresponding section is realized, and finally greatly improved It alleviates the problem of insufficient water supply in the low-pressure section during low-speed quenching of the steel plate, the pressure continues to drop, and the problem of affecting the surface quality of the quenched steel plate. Background technique [0002] The water system of the quenching machine is usually composed of a high-...

Claims

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Application Information

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IPC IPC(8): C21D11/00C21D1/18
Inventor 邱志宏张强刘晓辉丁志勇王普田士平闫志平
Owner SHOUGANG CORPORATION
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