JPS5931406B2 - Cold rolling dull/roll processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dull finish used for surface dull finishing of cold rolled steel sheets.
Concerning an economical method for processing rolls.

In the production of cold-rolled steel sheets, the surface dull finish during cold rolling prevents seizure during annealing, and the surface dull finish during temper rolling has a desirable effect on the lubrication state during product processing and the coating properties during surface treatment. give. Therefore, during rolling, surface wear of the dull rolls is detected and replaced as soon as possible to ensure a predetermined surface roughness at all times. Further, in order to extend the dull life of the roll, for example, electrical discharge machining for the roll has been put into practical use. As shown in Fig. 1, this roll dull electric discharge machine consists of a machine body a equipped with a large number of electrodes p, a machining power source (not shown), and a machining power source (not shown).
, processing liquid tank b, mechanism c for holding and driving the processing roll,
It also includes a device (not shown) for passing the machining fluid through P. holding the roll d in processing oil by a holding device c;
The roll is rotated with the tool and electrode facing the machined surface of the roll in the processing oil, and the electrode and the machined surface of the roll are servo controlled at minute intervals to apply a pulsed voltage between the poles. A continuous electrical discharge machining surface is created on the roll surface by feeding, and the entire surface is finally dulled. Therefore, the conventional electric discharge machine for direct machining of rolling rolls is extremely large in size as a whole, and the cost of the equipment is also high.

An object of the present invention is to provide a means for dulling a roll without requiring much equipment cost, thereby reducing production costs.

The present invention does not directly process large rolling rolls, but instead processes small rolls by electric discharge, etching, engraving, electron beam, etc. The present invention is characterized in that an indirect processing method is used in which the rolling roll is dulled using the small rolls mentioned above.

That is, in the method of the present invention, a plurality of small-sized rolls (hereinafter referred to as processing rolls) whose material is harder than a rolling roll are prepared, and a normal electric discharge dal is applied to the processing rolls in advance. Process it. Since this processing roll is a small roll having a diameter of, for example, 10011 and a length of about 200 nm, the processing device that processes the roll may be small. The rolling roll may be dulled while it is still installed in the rolling stand, or the rolling roll may be removed from the rolling stand and placed in the processing position.

As shown in FIG. 2, the machining process is carried out by holding the rolling roll 1 rotatably in a rolling stand or at a position outside the rolling line, and pressing the application roll 2 against the circumferential surface of the rolling roll.
to press. A reciprocating carriage 3 that moves parallel to the axial direction of the rolling roll is provided near the installation position of the rolling roll, a fluid cylinder 4 is fixed to the carriage 3, and the rod 41 of the fluid cylinder 4 is A processing roll 2 is rotatably installed at the tip thereof, and the processing roll 2 is pressed into engagement with the outer circumferential surface of the rolling roll 1 by the operation of the cylinder 4. At this time, the processing roll 2 is kept parallel to the rolling roll 1,
Press from a direction perpendicular to the axis of the rolling roll 1. In the present invention, the entire surface of the roll is dulled by applying a pressing force to the processing roll 2 on the outer peripheral surface of the roll.

First, the carriage 3 is made to correspond to the end of the installed rolling roll 1, and then the processing roll 2 is pressed against the rolling roll 1, and at the same time, the motor 5 of the rolling roll holding device is driven.
Give gentle rotation to the rolling roll 1. As a result, the working roll 2 rotates on the circumferential surface of the rolling roll 1 while being in pressure contact with the rolling roll 1, and physically applies a roughening process to the outer circumferential surface of the rolling roll 1. The carriage 3 is sequentially and gently moved toward the other end side in accordance with the rotational movement of the rolling roll 71/1, thereby completing dulling over the entire circumferential surface of the rolling roll 1. In addition, when the dull pattern of the processing roll 2 is worn out during processing and the processing roughness decreases, the processing roll is quickly replaced to maintain a predetermined dull roughness. The processing roll used in the present invention is a rolling roll/
A material harder than that is required, and materials such as artificial diamond and sintered cemented carbide are suitable.

According to the method of the present invention, there is no need for a large electrical discharge milling machine for rolling rolls, and the electrical discharge processing of very small milling rolls,
Since only a processing machine for etching, engraving, electron beam, etc. is required, the equipment cost and operating cost for dull processing are significantly reduced, contributing significantly to the cost reduction of finished products.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a dull electric discharge machine. FIG. 2 is a schematic perspective explanatory view during dull processing by the method of the present invention. 1: Rolling roll, 2: Processing roll, 3: Carriage table, 4: Fluid cylinder.

Claims (1)

[Claims] 1. Dulling is applied to the surface of a roll that is harder and smaller in size than the rolling roll to obtain a dulling roll, and the rolling roll is pressed against the surface of the rolling roll and the rolling roll is rotated to dull the roll surface. A cold rolling dull/roll processing method characterized by applying.