JPH0366501A - Recessing method for plated roll surface - Google Patents

Abstract

PURPOSE:To accomplish recessing for a roll surface with a plated layer with high accuracy and high efficiency and at a low cost by cutting a groove on the surface of a plated roll at a cutting speed of 0.01 - 0.2m/s, at a feed speed of 0.03 - 0.3mm/s and with depth of cut less than 0.1mm. CONSTITUTION:At the time of recessing a spiral grove 3 on the pripheral surface of a roll formed by disposing a plated layer 2 on the base metal, a groove of a designated shape can be obtained with high accuracy at the peripheral speed of the roll ranging from 0.01 to 0.2m/s and at the cutting tool feed speed ranging from 0.03 to 0.3mm/s. The depth of cut by a cutting tool is let be less than 0.1mm. Thus, cutting of a groove can be accomplished with high accuracy, seizure of a cutting tool can be prevented, and long-time working can be accomplished at a low cost.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is applicable to rolls for manufacturing quenched ribbons, conductor rolls for electroplating lines (EGL), and conductor rolls for hot-dip plating lines (
The present invention relates to a method of cutting grooves on the surface of a roll provided with a plating layer, which is used for zinc rolls (CGL) and process rolls for cold rolling.

The surfaces of rolls used in manufacturing processes such as casting and rolling are often subjected to various surface treatments, particularly plating treatments, for the purpose of improving wear resistance and corrosion resistance.

On the other hand, in EGL's conductor roll or CGL's zinc roll, grooves are provided on the roll surface for the purpose of uniformly supplying the plating solution to the sheet surface or for molten metal to adhere uniformly to the steel sheet surface in the tank. It has been known.

(Prior Art) Generally, grooves are formed on the surface of a roll by first forming grooves in the base material of the roll, and then plating the roll.

That is, in cold rolling process rolls, the outermost surface is coated with chromium plating after grooves are formed on the base material, except in the case where irregularities are formed by laser dulling or the like after hard chromium plating is applied to the outermost surface. On the other hand, the innermost layer or intermediate layer may be formed by Ni plating or Cu plating for the purpose of improving corrosion resistance and conductivity. Therefore, the thickness of the plating layer varies depending on the type of plating layer, and specifically has a wide range of 0.1 mm to several layers. Therefore, if the base material is covered with plating after the grooves are formed, it is impossible to process the grooves with an accuracy of several μm.

Furthermore, when a groove is machined into a Ni-plated layer or a Cu-plated layer using an NC lathe, the Ni plating or Cu plating adheres to the cutting tool, causing severe wear on the cutting edge, making it difficult to perform accurate machining.

Regarding molds for slow cooling in the continuous casting process, Japanese Patent Application Laid-Open No. 129257/1983 describes that the Ni plating layer formed on the mold surface is chemically polished and then grooved to extend the life of the mold. Japanese Patent No. 180649 discloses forming arbitrary irregularities on the surface after porous plating. However, with these methods, it is difficult to process grooves of a predetermined shape with high precision. In particular, the grooved rolls used in the quenched ribbon method require high precision in the processing of the grooves, as errors in the depth and width of the grooves directly lead to surface defects on the plate and cracks in the cooling roll.

(Problem to be solved by the invention) Therefore, this invention aims to solve the problem of EGL conductor roll and CGL
We propose a method that can achieve highly accurate, efficient, and low-cost groove processing on the surface of rolls with a plating layer, such as zinc rolls and other cold rolling process rolls and cooling rolls for manufacturing quenched ribbons. The purpose is to

(Means for Solving the Problems) This invention provides a method for cutting the surface of a plated roll having a plated layer on the surface of a base material at a cutting speed of o, oi to 0.2 mm.
/s, feed speed: 0,03~0,3mm/
This is a method for forming grooves on the surface of a plated roll, characterized in that the grooves are formed by cutting to a depth of 0.1 mm or less.

Here, the plated roll means, for example, EGL conductor roll with a Cu plating layer, CGL zinc roll with a Ni alloy plating layer, or Ni plating layer + Cr.
This applies to all rolls that have a plating layer, such as cooling rolls for manufacturing quenched ribbons that have a plating layer (surface).

Furthermore, ceramics (^12o1. WC-Co, etc.), herbanite (heat-resistant alloy), and the like are advantageously suitable as bits used directly for cutting.

Now, Fig. 1 shows an example of groove processing applied to a plated roll that is suitable for conductor rolls in an electroplating line. This is a reduced version of 3.

Since the illustrated groove 3 extends along the circumference of the roll, the cutting speed can be ensured by rotating the roll. That is, it is sufficient to apply rotation such that the circumferential speed of the roll is in the range of 0.01 to 0.2 m/s.

Next, the surface of the roll that has been given a predetermined rotation is subjected to cutting using a cutting tool that gives a feed movement of a feed rate of 0.03 to 0.3 mm/s and a cutting movement of a cutting depth of 0.1 mm or less. Then, groove 3 is cut.

Furthermore, Fig. 2 shows an example of groove processing applied to a plated roll applied to a cooling roll for manufacturing a quenched ribbon, in which cross grooves 4 arranged at approximately equal intervals are formed on the Ni plating layer 2 which is formed on the surface of the roll base material 1. In addition, the Cr plating layer 2' on the groove 3 is removed.

The illustrated groove 4 is processed by, for example, arranging a low left bit along the circumference of the roll and then rotating the roll, so the cutting speed can be secured by rotating the roll. In addition, in processes other than low left processing, the roll is rotated to first cut a right-handed helical groove, and then to cut a left-handed helical groove to form a lattice-like intersecting groove.

(Function) Next, the experiment that led to this invention will be described in detail.

When machining a spiral groove on the circumferential surface of the roll shown in Fig. 1, the depth of cut of the cutting tool was kept constant (0,076 mm), the peripheral speed (cutting speed) of the roll and the feeding speed of the cutting tool were varied, The results of observing the obtained cut and finished surface are shown in FIG.

From the same figure, cutting processing that can obtain grooves of a predetermined shape with high precision requires a roll circumferential speed (cutting speed) of 0.01-0.2 m/s and a cutting tool feed rate of 0, 03-0, 3 mm/s.
s (It can be seen that it follows the D range.

On the other hand, FIG. 4 shows the results of an investigation into the relationship between the depth of cut of the cutting tool and the amount of wear of the cutting tool. The experiment was conducted with the circumferential speed of the roll and the feeding speed of the cutting tool set within the above ranges.

From the figure, it can be seen that when the cutting depth of the cutting tool exceeds 0.1 rma, seizure occurs and cutting becomes impossible.

That is, if the cutting speed is less than 0.01 m/s or the feed rate of the cutting tool is less than 0.03 w/s, chip formation between the roll surface and the cutting tool cannot be achieved. On the other hand, if the cutting speed exceeds 0.2 m/s, the feed rate of the cutting tool exceeds 0.3 mm/s, or the cutting depth of the cutting tool exceeds 0.1 disc, the cutting tool will weld to the roll surface and wear will occur. This makes it difficult to obtain grooves with a predetermined shape, and shortens the life of the cutting tool.

(Example) Roll outer diameter: 800 [111φ and roll axis length 85
For rolls made of copper with a 0.2 mm thick Ni plating layer on the surface, the width a: Q, 1 as shown in Fig. 1 is used.
It was cut using an NC lathe to form a groove with a V-shaped cross section, depth b: o, 07++ am, and interval c: 2.0 mm. The cutting tool was made of ceramics (Ah03), the circumferential speed of the roll was 0.2 m/s, and the feeding speed of the cutting tool was 0.2 m/s.
1mm/s and cutting depth of cutting tool: 0.0? am
The conditions were set as follows.

After the cutting, the shape of the grooves cut on the roll surface was measured, and it was confirmed that the desired grooves without errors were obtained.

(Effects of the Invention) If this invention is applied to the grooving of rolls that have a plating layer on their surfaces, such as cold rolling process rolls or rolls for producing rapidly quenched ribbons, the grooving can be performed with high precision, and the cutting tool can be Long-term machining can be achieved at low cost without burning.

[Brief explanation of drawings]

Figure 1 (a) is a front view showing an example of groove machining on a plated roll, Figure (b) is a sectional view of the groove, Figure 2 is a schematic diagram showing another example of groove machining, and Figure 3 is a cutting tool. Figure 4 is a graph showing the influence of feed speed and roll circumferential speed on groove machining, and Figure 4 is a graph showing the upper limit of cutting depth of the cutting tool. l... Base material 2.2'... Plating layer 3
．． 4... Groove Figure 1 Figure 2 (b) Figure 3 Roll 0 area Liao (/F/sec)

Claims (1)

[Claims] 1. Cutting speed: 0.01 to 0.2 m/s, feeding speed: 0.03 to 0.3 mm/s, and depth of cut: 0. 1
A method for forming grooves on the surface of a plated roll, characterized in that the grooves are formed by cutting to a diameter of mm or less.