JPH0593610U - Roll heating and rolling equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] A roll heating and rolling apparatus performs precision control corresponding to a change in shape of a material to be rolled by temperature management corresponding to temperatures at a plurality of points of the material to be rolled. [Structure] A forming roll for rolling a material to be rolled and a contactor for Joule heat generation of the material to be rolled are provided, and a controller for controlling a power supply amount is arranged to each contactor.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roll heating and rolling apparatus, and more particularly, to a technique for rolling while causing a jar to generate heat by supplying power to a material to be rolled.

[0002]

[Prior Art]

 When forming a Ni-based alloy or the like by isothermal rolling, the processing temperature must be set in the range of 900 ° C to 1100 ° C, for example.

FIG. 2 shows an example of a rolling apparatus, which is intended to maintain the above-mentioned working temperature by Joule heat generation due to direct energization of the material X to be rolled. While being controlled by the controller 2 connected to the DC power source 1, a current is applied to the material X to be rolled between the forming rolls 4 through the pair of contacts 3 and the forming rolls 4 forming a pair as indicated by a broken line. , Which causes Joule heat generation of the material to be rolled X, the amount of heat generation proportional to the square of the current and the resistance value is obtained based on Ohm's law, and the temperature of the material to be rolled X is set within the above temperature range. To do.

[0004]

[Problems to be solved by the device]

 However, when the means for heating the rolled material (heating device and heating method) is examined, the current flowing through the material X to be rolled tends to have a large current distribution in the vicinity of the electric path connecting the pair of contacts 3 in the shortest distance. In the example of FIG. 2, it is conceivable that the amount of heat generated at the side portion becomes small and the difference from the central portion becomes large, resulting in uneven temperature. As another example of the heating method, induction heating with a high-frequency current may be considered. In this case, it is necessary to set the shape of the induction heating coil according to the shape change of the material X to be rolled. However, the practicality is impaired in terms of economy.

The present invention has been made in view of these problems, and achieves the objects such as uniform temperature distribution during heating of a material to be rolled and improvement of controllability of temperature distribution. is there.

[0006]

[Means for Solving the Problems]

 The roll heating and rolling apparatus according to the present invention includes a forming roll that rolls a material to be rolled, and a contactor that contacts the outer peripheral surface of the forming roll and energizes the material to generate Joule heat. The contacts are arranged along the axial direction at a plurality of positions on the outer peripheral surface of the forming roll, and a controller for controlling the amount of power supplied from the power source is arranged for each contact.

[0007]

[Action]

 The power supply current from the power supply is distributed to each contactor by the controller, and is supplied to the material to be rolled via the forming roll arranged between each pair of contactors to generate Joule heat. Therefore, it becomes possible to adjust the amount of Joule heat generation corresponding to the temperature of multiple points of the rolled material.

[0008]

【Example】

 An embodiment of the roll heating and rolling apparatus according to the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 12 is a controller, and 13A, 13B and 13C are contacts.

As the controller 12, a power supply circuit corresponding to the logarithm of the contacts 13A, 13B, 13C and a function of controlling a distribution current value of the power supply circuit are applied.

The respective contactors 13A, 13B, 13C are arranged at a plurality of locations on the outer peripheral surface of the forming roll 4 so as to maintain a contact state along the axial direction.

A temperature sensor or the like for detecting temperatures at a plurality of points of the material to be rolled X is arranged at or near the material to be rolled X, and the power feeding circuit of the controller 12 is detected by the temperature detected by the temperature sensor. Is controlled.

When the DC power supply (power supply) 1, the controller 12 and the temperature sensor are operating, the controller 12 supplies the contactor 13A, 13B, 13C with a power supply current from the DC power supply (power supply) 1. Be distributed to. When power is supplied between the pair of contacts 13A, 13B, 13C as indicated by the broken line in FIG. 1, the material to be rolled X is rolled based on the distributed current and the resistance value of the material to be rolled X. Generates joule heat.

When the temperature of the rolled material X at a plurality of points is detected by a temperature sensor and the temperature range deviates from the set range, contact points 13A, 13B, 13C corresponding to the points are detected. By adjusting the feeding current individually, the temperature of each part of the material X to be rolled is corrected within the set range, and the temperature of the entire area of the material X to be rolled is set within the desired range.

[0014]

[Effect of the device]

 According to the roll heating and rolling apparatus of the present invention, the forming roll for rolling the material to be rolled and the contact for contacting the forming roll to generate Joule heat of the material to be rolled are provided, and the contactor has the forming roll. The following effects are achieved because the controller is arranged along the axial direction at a plurality of locations on the outer peripheral surface of the device, and a controller for controlling the power supply amount is provided for each contact. (1) Since the controller distributes the power supply current for Joule heat generation to each contactor, it is possible to adjust the Joule heat value corresponding to the temperature of multiple points of the material to be rolled, and to even out the temperature distribution of the material to be rolled. Can be managed. (2) Since the power supply current to each contactor is controlled, the temperature can be adjusted according to the contact position of the forming roll, and precise control corresponding to the shape change of the material to be rolled can be performed. (3) Centralized management of multiple locations can be easily performed by the controller.

[Brief description of drawings]

FIG. 1 is a front view with a block diagram showing an embodiment of a roll heating and rolling apparatus according to the present invention.

FIG. 2 is a front view with a block diagram showing a conventional example of a roll heating and rolling apparatus.

[Explanation of symbols]

 X Rolled material 1 DC power supply (power supply) 4 Forming roll 12 Controller 13A, 13B, 13C Contactor

Claims (1)

[Scope of utility model registration request] 1. A roll heating and rolling apparatus comprising: a forming roll for rolling a material to be rolled; and a contact for contacting an outer peripheral surface of the forming roll to generate Joule heat by energizing the material to be rolled, A roll heating and rolling apparatus characterized in that contacts are arranged along the axial direction at a plurality of locations on the outer peripheral surface of a forming roll, and that each contact is provided with a controller that controls the amount of power supplied from a power supply.