TW201806694A - Rotary grinding wheel and apparatus and method for roll polishing - Google Patents

Abstract

Provided are a roll polishing rotating grindstone that prevents the polishing debris generated during polishing from accumulating in recesses in the center of a polishing face of the roll polishing rotating grindstone and that allows roll polishing to be performed stably without making a surface to be processed have uneven surface roughness, and a roll polishing device and method. A roll polishing rotating grindstone for performing vertical polishing of the surface of a roll by bringing a polishing face in contact with the roll surface has: a rotating grindstone body that has a rotating shaft mounted to the back end face thereof and that has the polishing face formed on the front end face thereof; and a recess that is provided in the center of the front end face of the rotating grindstone body. The recess is a tapered recess wherein the diameter of the inner circumferential face of the recess expands from the back end face of the rotating grindstone body toward the front end face of same.

Description

Grinding wheel for roll grinding, roll grinding device and roll grinding method

The present invention relates to a roll grinding wheel for roll grinding, and a roll grinding device and method using the same.

Conventionally, as an abrasive for grinding rollers, rolls, conveying rollers, etc. for gravure plate-making, a grinding wheel is included. The grinding wheel for roller grinding rotates the roller and rotates the grinding wheel so that the grinding surface of the end surface of the generally annular grinding wheel abuts against the surface of the roller and grinds the surface of the roller.

Such a grinding wheel for roll grinding is not attached to the outer surface of the main body of the grinding wheel, but the abrasive material on the surface is bonded to the grinding surface. As mentioned above, the grinding surface of the rotating surface of the grinding wheel is brought into contact with the surface of the roller. Grinding is also referred to as vertical grinding.

Gravure printing is to form a plate on a gravure cylinder (gravure cylinder) to form a micro concave portion (groove cell) corresponding to the platemaking information, and fill the groove with ink to transfer it. For printed matter. A general gravure plate-making roller is a copper plated layer (plate material) for forming a plate formed on the surface of a hollow roller made of metal such as aluminum or iron or reinforced resin such as carbon fiber reinforced resin (CFRP), and the copper plated layer A large number of minute recesses (grooves) corresponding to the platemaking information are formed by etching, and then a surface hardening coating layer such as chrome plating is used to increase the brush resistance of the gravure platemaking roller to complete the platemaking (the production of the plate surface). ).

The above-mentioned roll for gravure plate making with a copper-plated layer is roll-milled by a grinding wheel.

In addition, when manufacturing a gravure plate-making roller, in order to perform mirror polishing or finishing polishing on the gravure plate-making roller, roller grinding is also performed. Examples of such a roll grinding wheel include Patent Document 1 and Patent Document 2. Moreover, as a roller grinding apparatus provided with the grinding wheel for roller grinding, patent document 3 is mentioned, for example.

In addition, roll grinding is also used to grind rolls made of metal, such as rolls and transport rolls.

A conventional grinding wheel is shown in FIG. 6. The conventional grinding wheel 100 shown in FIG. 6 includes a grinding wheel body 104 with a rotating shaft mounted on the back end surface 108 and a grinding surface 112 formed on the front end surface 106, and a through hole 102 provided in the center of the grinding wheel body 104. It is a grinding wheel for roller grinding for making the surface of the roller abut on the surface of the roller and vertically grinding the surface of the roller. In addition, as for the through hole 102, the inner peripheral surface 110 of the through hole 102 has the same diameter from the back end surface 108 of the grinding wheel body 104 toward the front end surface 106. That is, to become a straight inner path.

When roll grinding is performed, the grinding surface of the grinding wheel for roll grinding and the surface of the roller are scraped off by grinding, so that grinding dust is generated. However, in the conventional grinding of the grinding wheel of a roller, in the through-hole portion in the center, that is, the concave portion, the grinding chips generated during the grinding will accumulate, and the accumulated grinding chips contact the surface of the roller to make the surface of the machined surface rough. The degree becomes uneven, and there is a problem that the confirmation and cleaning of the through-hole portion must be performed frequently.

[Patent Document 1] Japanese Utility Model Registration No. 3105512

[Patent Document 2] Japanese Patent Laid-Open No. 2000-24935

[Patent Document 3] Japanese Patent Laid-Open No. 2000-127005

[Patent Document 4] International Publication WO2011 / 125926

An object of the present invention is to provide a grinding wheel for a roll grinding, a grinding device and a method thereof, which can prevent grinding debris generated during grinding from accumulating in the recessed portion of the center portion of the grinding surface of the grinding wheel, and suppress the surface roughness of the machined surface Uneven and stable roll grinding.

In order to solve the above problems, the grinding wheel for roll grinding of the present invention includes a grinding wheel body having a rotating shaft mounted on a back end surface and a grinding surface formed on a surface end surface, and a recess provided at the center of the surface end surface of the grinding wheel body. It is a grinding wheel for roll grinding for abutting the grinding surface on the surface of the roller to vertically grind the surface of the roller, and the recess is formed so that the inner peripheral surface of the recess is from the back of the grinding wheel body. The tapered concave portion whose end surface is enlarged toward the front end surface.

As the aforementioned roller, any roller such as a roll for gravure plate making such as a metal roller, a roll, or a conveyance roller can be used, but a roll for gravure plate making is preferred.

The roll grinding device of the present invention is a roll grinding device provided with a grinding wheel for roll grinding.

The roll grinding method of the present invention is a roll grinding method using the aforementioned grinding wheel for roll grinding.

According to the present invention, it is possible to provide a grinding wheel for a roll grinding, a roll grinding device, and a method, which can prevent grinding debris generated during grinding from accumulating in the recessed portion of the center portion of the grinding surface of the grinding wheel, and suppress the surface roughness of the machined surface from becoming uneven Uniform and stable roll grinding is effective.

10a, 10b, 36‧‧‧ Grinding wheel for roller grinding of the present invention

12a, 12b, 40‧‧‧ back face

14a, 14b‧‧‧rotation shaft

16a, 16b, 38‧‧‧ face

18a, 18b, 48‧‧‧ polished surface

20a, 20b, 50‧‧‧ wheel body

22a, 22b, 42‧‧‧ recess

24‧‧‧ roller

26‧‧‧ surface of the roller

28, 44‧‧‧ inner peripheral surface

30, 46‧‧‧‧conical recess

32‧‧‧through hole

34a, 34b ‧ ‧ chuck cone

100‧‧‧Learned grinding wheel

102‧‧‧through hole

104‧‧‧Grinding wheel body

106‧‧‧face

108‧‧‧back face

110‧‧‧Inner peripheral surface

112‧‧‧ polished surface

FIG. 1 is a schematic plan view schematically showing a roll grinding method using an embodiment of a roll grinding wheel according to the present invention.

FIG. 2 is a schematic side view showing a state in which one embodiment of the grinding wheel for roller grinding according to the present invention abuts on the surface of a roller.

FIG. 3 shows an embodiment of the grinding wheel for roll grinding according to the present invention, in which (a) is a plan view and (b) is a side sectional view.

Fig. 4 is a side cross-sectional view showing another embodiment of a roll grinding wheel according to the present invention.

FIG. 5 is an enlarged photograph showing a state of a roll grinding wheel after the roll grinding in Example 1. FIG.

Fig. 6 shows a conventional grinding wheel for roll grinding, in which (a) is a plan view and (b) is a side sectional view.

FIG. 7 is an enlarged photograph showing a state of a roll grinding wheel after the roll grinding of Comparative Example 1. FIG.

Hereinafter, embodiments of the present invention will be described. These embodiments are merely examples, and various modifications can be made without departing from the technical idea of the present invention. The same component is represented by the same symbol.

In FIGS. 1 to 3, reference numerals 10a and 10b denote one embodiment of the grinding wheel for roll grinding according to the present invention.

The grinding wheels 10a and 10b for roller grinding have the grinding wheel bodies 20a and 20b with the rotating shafts 14a and 14b mounted on the back end surfaces 12a and 12b and the grinding surfaces 18a and 18b formed on the front end surfaces 16a and 16b, and the grinding wheels provided thereon. The recesses 22a and 22b in the center of the surface end faces 16a and 16b of the main bodies 20a and 20b are for roller grinding where the surface 26 of the roller 24 abuts the aforementioned grinding surfaces 18a and 18b to vertically grind the surface 26 of the roller 24 In the grinding wheel, the recessed portions 22a and 22b are formed so that the inner peripheral surface 28 of the recessed portions 22a and 22b is formed. A tapered recess 30 having a diameter enlarged from the back end surfaces 12a, 12b of the grinding wheel bodies 20a, 20b toward the front end surfaces 16a, 16b. That is, it is formed into a tapered inner diameter.

Because it is formed into the conical recessed portion 30 in this way, the grinding debris generated during the grinding of the recessed portions 22a and 22b is easily discharged to the outside by the centrifugal force generated by the rotation of the rollers 10a and 10b. Therefore, it is not easy to accumulate abrasive debris in the recessed portions 22a, 22b, it is possible to prevent the accumulation of abrasive debris in the recessed portions 22a, 22b, and it is possible to suppress the unevenness of the surface roughness of the machined surface, that is, the surface of the roller, and to perform stable roll grinding. The grinding debris is generated by scraping the grinding surfaces of the grinding wheels 10a, 10b for roller grinding, or scraping the surface of the roller by grinding.

The taper angle of the tapered concave portion 30 is preferably, for example, 1 ° to 45 °.

The roller 24 is an example of a roller for gravure plate-making, such as a roller in a state where copper plating is applied to the surface of a metal hollow roller such as aluminum or iron. The roller 24 is formed with a through hole 32 penetrating in the axial direction, and is rotatably supported by chuck cones 34a and 34b.

In the example of FIG. 1, two roller grinding wheels 10 a and 10 b are provided on one side of the roller 24. In other words, the example of FIG. 1 is an example of a case where one-side two-head grinding is performed. However, as for the roller 24, two roller grinding wheels are provided on both sides, and four-head grinding may be performed as shown in Patent Document 3. In addition, the two grinding wheels 10a and 10b shown in FIG. 1 can be rotated simultaneously, or they can be moved in the same direction while being synchronized.

Attach the grinding wheels 10a, 10b for roll grinding to a well-known gravure A roller grinding device such as a roller mill for a plate roller is a roller grinding device provided with a grinding wheel for roller grinding according to the present invention. Examples of the roll grinding device include the abrasive grinding device described in Patent Document 3 and the abrasive grinding device described in Patent Document 4. In addition, by performing roll grinding using the roll grinding wheels 10a, 10b, the roll grinding method of the present invention is used.

In the example of FIGS. 1 to 3, although the through-holes are formed as examples of the recessed portions 22 a and 22 b, in addition to the through-holes, it may be a non-through hole such as shown in FIG. 4.

In FIG. 4, the grinding wheel 36 for roller grinding has a grinding wheel body 50 with a rotating shaft mounted on the back end surface 40 and a grinding surface 48 formed on the front end surface 38, and a center of the front end surface 38 provided on the grinding wheel body 50. The recessed portion 42 is formed as a tapered recessed portion 46 in which the inner peripheral surface 44 of the recessed portion 42 is enlarged in diameter from the back end surface 40 of the grinding wheel body 50 toward the front end surface 38. The tapered recessed portion 46 is a hole that is formed as a depression and does not penetrate. The structure other than the tapered recess 46 is the same as that of the above-mentioned grinding wheel 10a.

The grinding wheel 36 shown in FIG. 4 is also formed as a conical recessed portion 46, so that the grinding debris generated during grinding of the recessed portion 42 is easily accumulated by the centrifugal force generated by the rotation of the roller 36 It is drained out. Therefore, it is not easy to accumulate abrasive debris in the recessed portion 42, it is possible to prevent the accumulation of abrasive debris in the recessed portion 42, and it is possible to stably perform roll grinding while suppressing unevenness in the surface roughness of the working surface, that is, the surface of the roller.

[Example]

The following examples illustrate the present invention in more detail. These examples are merely examples, and should not be interpreted restrictively, of course.

(Example 1)

An aluminum hollow roller having a circumference of 600 mm and a face length of 1100 mm was installed in a copper plating treatment apparatus, and the hollow roller was immersed in a plating solution of a copper plating bath to form 40 μm under conditions of 20 A / dm ² and 6.0 V. Copper plating. No foreign matter or dents occurred on the surface of the plating layer, and a uniform copper plating layer was obtained as a base material. For the surface of the copper plating layer, a double-head type grinder (THINK LABORATORY CO., LTD.) Made of a roll grinding wheel according to the present invention shown in FIGS. 1 to 3 was used. ), The surface of the roller is polished so that the surface of the copper plating layer becomes a uniform polished surface.

Roll grinding was performed by setting the number of rotations of the roller to 120 rpm, the number of rotations of the grinding wheel to 800 rpm, and each of the feed rate of the grinding wheel to 800 mm / min. FIG. 5 shows a photograph obtained by using a grinding wheel of a roller mill after grinding. As shown in FIG. 5, in the recessed portion of the center portion of the polishing surface of the roll grinding wheel, almost no accumulation of abrasive debris generated during polishing was observed.

(Comparative example 1)

As in Example 1, an aluminum hollow roller having a circumference of 600 mm and a face length of 1100 mm was installed in a copper plating treatment apparatus, and the hollow roller was immersed in a plating solution of a copper plating bath at 20 A / dm ² A copper plating layer of 40 μm was formed under the conditions of 6.0V. No foreign matter or dents occurred on the surface of the plating layer, and a uniform copper plating layer was obtained as a base material. For the surface of the copper plating layer, a double-head type grinder (a grinder manufactured by THINK LABORATORY CO., LTD.) Equipped with a conventional roll grinding wheel shown in FIG. 6 was used. The surface of the roller is polished so that the surface of the copper plating layer becomes a uniform polished surface.

Roll grinding was performed by setting the number of rotations of the roller to 120 rpm, the number of rotations of the grinding wheel to 800 rpm, and each of the feed rate of the grinding wheel to 800 mm / min. FIG. 7 shows a photograph obtained by using a grinding wheel of a roller mill after grinding. As shown in FIG. 7, in the through hole (concave portion) of the center portion of the polishing surface of the grinding wheel for roll grinding, a large amount of abrasive dust generated during grinding is accumulated.

10a, 10b ‧‧‧ Grinding wheel for roller grinding of the present invention

12a, 12b ‧‧‧ back face

14a, 14b‧‧‧rotation shaft

16a, 16b‧‧‧face

18a, 18b ‧‧‧ polished surface

20a, 20b ‧‧‧ wheel body

22a, 22b ‧‧‧ recess

24‧‧‧ roller

26‧‧‧ surface of the roller

34a, 34b ‧ ‧ chuck cone

Claims (4)

A grinding wheel for roller grinding is provided with a grinding wheel body with a rotating shaft mounted on a back end surface and a grinding surface formed on a surface end surface, and a recess provided at the center of the surface end surface of the grinding wheel body, and is used on the surface of the roller. The grinding wheel for roller grinding, which makes the grinding surface abut and vertically grinds the surface of the roller, the recess is formed in a tapered shape in which the inner peripheral surface of the recess is enlarged from the back end surface of the grinding wheel body to the front end surface. Recess. The roll grinding wheel according to claim 1, wherein the roller is a roller for gravure plate-making. A roll grinding device comprising the grinding wheel for roll grinding according to claim 1 or 2. A roll grinding method using the roll grinding wheel according to claim 1 or 2.