Speed control system and method of titanium welded pipe production line

Abstract

The invention discloses a speed control system and a speed control method of a titanium welded pipe production line. The system comprises a programmable controller, a counting module, a molding unit direct current speed regulator, a sizing unit direct current speed regulator, a pulling unit direct current speed regulator and an operating screen, wherein the counting module is connected with a thermal treatment front coder and a thermal treatment rear coder respectively; the thermal treatment front coder is positioned between a sizing unit and thermal treatment equipment; and the thermal treatment rear coder is positioned between the thermal treatment equipment and a pulling unit. The thermal treatment front coder and the thermal treatment rear coder are arranged in front of and behind thethermal treatment equipment respectively and feed a measured practical titanium pipe speed to the counting module, and the programmable controller can perform automatic comparison and fine adjustmenton the set speed of a production line unit according to two practical speeds of the counting module, so that speed before and after thermal treatment is kept consistent, and problems such as pressuremarks, which are caused by speed difference, on the surface of the titanium pipe, elongation and fine drawing of the titanium pipe, and the like are solved.

Description

technical field [0001] The invention relates to a precision titanium welded pipe production line for titanium pipes, in particular to a speed control system and a control method for the titanium welded pipe production line. Background technique [0002] In the traditional titanium welded pipe production line, when dealing with the speed control between the forming unit, the sizing unit and the drawing unit, the speed of the driving motor is set and the actual speed of each driving motor is compared to ensure that the speed of the entire production line is roughly controllable. However, when the drive motor drives the rolls, the contact points between each roll and the titanium tube are not at the same shaft diameter position, some are directly below the roll, and some are on the side of the roll, so even if the motor speed is the same, However, the linear speed of the titanium tube, that is, the actual speed of the unit, is different. However, the material of the titanium ...

AI Technical Summary

Problems solved by technology

However, when the drive motor drives the rolls, the contact points between each roll and the titanium tube are not at the same shaft diameter position, some are directly below the roll, and some are on the side of the roll, so even if the motor speed is the same, However, the linear speed of the titanium tube, that is, the actual speed of the unit, is different.

However, the material of the titanium tube is soft. If the speed of the front and rear racks is inconsistent, indentations will be formed on the surface of the titanium tube, which will affect the quality and appearance of the titanium tube. Moreover, during heat treatment, the heating temperature is relatively high. If the sizing machine at this time If the stringing speed is faster than the pulling speed of the rack wire, the titanium tube will be bent and deformed in the heating zone. If the sizing speed is slower than the pulling speed, the titanium tube will be elongated and thinned. The titanium tube in both cases Tubes are substandard

At this time, the operator has to fine-tune the speed through experience, current changes, etc., which brings inconvenience to production and reduces production efficiency.

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