JPH02180549A - Precise polishing device for four faces simultaneously of flat steel material - Google Patents

Abstract

PURPOSE:To prevent clogging by eccentric wear and a wear piece and to automatically correct the wear amt. of each grindstone, by rocking a grindstone at all times in the orthogonal direction with a guide mechanism consisting of plural guide rollers and the traveling of a flat steel material. CONSTITUTION:A flat steel is guided uniformly and stably by 16 pieces of guide rollers and this guide roller is set in about the same height, preventing the bent of the flat steel as far as possible by changing the relative intervals and height freely. Each grindstone is rocked by the driving of a rocking motor in a constant width in the traveling direction and orthogonal direction(direction B) of the flat steel 9. Accordingly, clogging can be prevented without any eccentric wear. A correction mechanism is located at the upper side of grindstone driving motors 41, 42, etc. The grindstone is moved in the press-fitting direction to the flat steel by the driving of a cutting motor 5 and when the polishing feed length becomes constant, correction is automatically executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a simultaneous four-sided precision polishing device for a flat steel material, and more specifically, the first invention continuously polishes four surfaces, both the top and bottom sides, of a flat steel material. The second invention relates to a flat steel polishing device that can simultaneously and precisely polish the steel, prevent uneven wear and clogging due to wear debris, and reduce bending of the flat steel after polishing. This invention relates to a flat steel material polishing device that can automatically correct the

The present invention is applicable to relatively small flat steel materials, for example, with a thickness of 05 to 10 mm.
Applicable to items with IDI of about 11 and width of about 1-15,
It is also used to remove oxide films or scratches on flat steel materials by ultra-precise polishing, and is further used in the manufacture of piston rings, mainsprings, etc. The apparatus of the present invention is mainly applied to flat steel materials, but it can also be applied to other metal materials other than steel materials, and also to rectangular materials such as rectangular shapes instead of flat materials. In the present invention, the term "flat steel material" has a broad meaning.

[Conventional technology]

In conventional flat steel material grinding (polishing) equipment, relatively large flat steel materials, for example, thickness of about 3 to 20+ nm and width of 50 to 2
There is a known device for grinding (polishing) only the scratched part, that is, only one side of a large object of about 0.00 mm.

[Problem to be solved by the invention]

The above-mentioned conventional grinding (grinding) equipment is for polishing large flat steel materials, and is not a device for ultra-precisely polishing small flat steel materials.
Since it is not a device that grinds surfaces continuously and almost simultaneously with one device, when grinding four surfaces, it is complicated to grind one surface and then turn it over and grind the other surface separately. I had no choice but to grind (polish) it using a unique method.

Furthermore, in this technical field, there are very strict quality requirements regarding the bending of flat steel materials such as piston rings, for example, bending of about inn/m is required. In the case of large flat steel materials, it is relatively easy to achieve this quality, but at Komura, in order to satisfy this quality, for example, a 150 mm length must have a bend within about 0.15 mark. It is very difficult to do so.

It has been difficult to achieve such high quality with conventional equipment.

The present invention has been made in view of the above viewpoints, and the present invention is based on the present invention.
The invention enables simultaneous and precise polishing of four surfaces, both the upper and lower sides, of a comparatively small flat steel material, and further prevents clogging due to uneven wear and wear debris, and reduces bending of the flat steel material after polishing. A second object of the present invention is to provide a flat steel polishing apparatus that can automatically correct the wear amount of each grindstone.

[Means to solve the problem]

The flat steel material polishing device of the first invention is a polishing device that simultaneously polishes four surfaces of a flat steel material that runs while being applied with tension in the longitudinal direction, and polishes each of the four surfaces of both the top and bottom sides of the flat steel material. A polishing mechanism consisting of a first whetstone, a second whetstone, a third whetstone and a fourth whetstone, a guide mechanism consisting of a plurality of guide rollers that guide the proper feeding of the flat steel material, and a guide mechanism consisting of a plurality of guide rollers that guide the appropriate feeding of the flat steel material, The vehicle is characterized by comprising a swinging mechanism that swings in a direction perpendicular to the traveling direction of the vehicle.

The flat steel material polishing apparatus of the second invention includes first correction mechanisms that automatically correct the wear amount of each grindstone caused by polishing each surface of the flat steel material according to the polishing feed length of the flat steel material; The present invention is characterized by comprising a correction mechanism consisting of a second correction mechanism, a third correction mechanism, and a fourth correction mechanism.

[Effect]

In the polishing apparatus of the first invention, as shown in FIG. A grindstone 14 polishes each of its right side surfaces.

Therefore, by conveying the flat steel material and polishing it with four grindstones, it is possible to continuously polish the four surfaces of both the upper and lower sides of the flat steel material.

Furthermore, as shown in direction B in FIGS. 1 and 4, since there is a swing mechanism, the grindstone can be constantly swinged in a direction perpendicular to the running direction of the flat steel material.

Moreover, this apparatus includes a guide mechanism consisting of a plurality of guide rollers for guiding the flat steel material so that the flat steel material can be conveyed with a proper posture while minimizing bending of the steel material. Therefore, the flat steel material can be fed without bending, and even if it is bent, the guide roller can correct the bend.

When a flat steel material is ground with each grindstone, the surface of each grindstone is worn. The degree of wear on the surface can be determined empirically in advance depending on the length of the flat steel material being fed to the workshop. Book Nj! Since the device of the I2 invention has the first to fourth correction mechanisms, the grinding wheel is brought into pressure contact with the polished surface of the flat steel material according to a constant feed length, as shown in FIGS. 1 and 4. It can be automatically moved in the incoming direction.

〔Effect of the invention〕

As described in the above-mentioned operation, the polishing devices of the first and second inventions are capable of polishing the four surfaces of both the top and bottom sides of a flat steel material, which is a small material, continuously and almost simultaneously with one device. It is possible to produce high-quality and precise abrasive products with less friction, which satisfies industry requirements.Furthermore, since it has a swinging mechanism, uneven wear of each grinding wheel and clogging due to wear particles can be prevented. Therefore, the grinding wheel can maintain stable and excellent performance for a long time.

In the polishing apparatus according to the second aspect of the invention, the amount of wear can be automatically corrected, and therefore there is no need to immediately change the grindstone when the grindstone is worn, resulting in extremely good workability.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

A schematic explanatory diagram of this polishing device is shown in Fig. 1, a plan view is shown in Fig. 2,
A front view seen from the I-M arrow direction is shown in FIG. This polishing device consists of a polishing mechanism 1, a guide mechanism 2, and a correction machine M! t
3, a swing mechanism, and a base 8.

The polishing mechanism 1 consists of four grinding wheels 11 to 14, first to fourth, in which the first and second grinding wheels 11.12 are arranged in the vertical direction, and the third
and the fourth whetstone 13.14 are arranged horizontally, the first whetstone 11 is arranged slightly above the second whetstone 12, and the third and fourth whetstones 13.14 are approximately at the same height; Whetstone 1
3 is placed slightly on the left side, and the fourth whetstone 14 is placed slightly on the right side.

Each of these grindstones is disk-shaped, and its diameter is approximately 240fflI.
Ilφ, its thickness is about 40Ωm. The material of this grindstone is a commonly used elastic abrasive material, non-woven abrasive material, etc. Note that this grindstone is connected to each of the grindstone drive motors (for example, 41, 42) and is rotatably supported. Further, a grindstone suppressing mechanism is provided so that each grindstone can be pressed in the direction of the flat steel material to properly grind the steel material.

The guide roller 2 guides the flat steel material so that it does not bend, and is installed at a position where the flat steel material is polished by each grindstone. This guide roller 2 has a pair of opposing rollers (for example, 22a and 22b, etc.), two sets around one grindstone, or a total of eight sets (total of 16 guide rollers 21a to 28a, 21b to 28b). It is located. Each of these eight sets is arranged at approximately equal intervals and guides the flat steel material uniformly and stably. And this 16
The guide rollers are set at approximately the same height, and the relative spacing and height can be changed freely, and the arrangement is such that bending of the flat steel material transported between the guide rollers is prevented as much as possible. .

In the plan view of FIG. 2, the correction mechanism is located above the grindstone drive motors 41, 42, etc., and is driven by the cutting motor 5 to move the grindstone (for example, 11, 12) in the direction in which it is pressed against the flat steel material. will be moved. The drive of the cutting motor 5 is set so that it can be automatically corrected when the polishing feed length of the flat steel material becomes constant. Note that this cutting motor 5 is mounted on a base 7 and is configured to be connected to a drive motor fixed shaft.

In the swinging mechanism, the swinging motor 6 is mounted on the base 8 so that the entire base 7, which holds and fixes the grindstone drive motor 41142, etc., can swing in the horizontal direction (direction B in the figure). By driving this swinging motor 6, the base 7 swings in the left-right direction.

The operating condition and operation of the apparatus of this embodiment will be explained below with reference to FIGS. 1 to 5.

First, it is a flat steel material (approximately 0.5 to 4 cm thick, 2 to 4 cm wide, with an oxide film formed on the entire surface) for making piston rings.
7IllI11) Prepare 9. This flat steel material 9,
Guide rollers 21a, 2 in the direction of steel material shown in FIG.
1b, and when the grindstone drive motor 41 and the like are driven, the flat steel material 9 is pressed against the first grindstone 11 while being corrected by the guide roller so that it does not bend. Therefore, the upper surface of this flat steel material 9 is polished first.

Next, the lower surface of the flat steel material 9 is polished by the second grindstone 12,
The third grindstone 13 grinds the left side of the flat steel material, and the fourth grindstone 14 grinds the right side. After passing through the first to fourth grindstones, the four surfaces of both the upper and lower sides of the flat steel material are continuously polished.

In addition, when a certain polishing feed length (approximately 50 m) is reached, the cutting motor 5 is intermittently driven, so the cutting motor 5 is moved by that polishing distance and press-welded in the same way, so that the polishing process is as good as the first time. Flat steel material 9 can be polished. Note that this movement can also be adjusted in multiple stages to make it substantially continuous.

In addition, the swing mechanism is always working by the drive of the swing motor 6, and the base 7 is always swinging in the direction B shown in FIGS. 2 and 3. As shown in FIG.
B direction) within a constant width (within about 40 mm or less). Therefore, if the rocking is not performed, uneven wear occurs as shown in Fig. 5 (A), but in this embodiment, as shown in Fig. 5 (B), uneven wear does not occur and clogging can be prevented. You can also do it.

As described above, according to the present apparatus, it is possible to continuously and simultaneously polish both the upper and lower sides of a small flat steel material, the amount of wear of each grindstone can be automatically corrected, and the bending of the flat steel material can be reduced.

Specifically, this bending is about 0.5 mm/m, which more than satisfies the industry requirements, and the smoothness of the polished surface is 0.4 to 0.811 m (Rz).
The surface roughness is significantly improved compared to the conventional surface roughness of several μm, and the surface has excellent gloss and good appearance. From the above, it is very
High precision polishing was achieved.

Note that the present invention is not limited to what is shown in the above-mentioned specific examples, but can be variously modified within the scope of the present invention depending on the purpose and use.

That is, the material, shape, size, polishing allowance, etc. of the flat steel material to be used can be selected from various values depending on the intended use. This polishing allowance can be variously selected depending on the material of the grindstone, the conveyance speed of the flat steel material, the pressure contact strength between the flat steel material and the grindstone, etc. In addition, two or three or more of these polishing devices are placed side by side,
It is possible to increase the conveyance speed of flat steel materials and improve productivity. In particular, when the polishing stock is large, it is convenient to use two or three sets to prevent heat generation.

Further, in the present invention, an automatic dresser mechanism can be attached to the polishing apparatus. This automatic dresser mechanism is designed to expose a new grinding wheel surface that can be used for good polishing, since the grinding function of the grindstone deteriorates due to long-term use, and also to remove the protruding parts at both ends as shown in Figure 5 (B). Delete and
This method is applied when it is desired to improve the polishing function by forming a flat surface as shown in FIG.

This mechanism will be explained below using the third grindstone 13 in FIG. 2 as an example. That is, the third grindstone 13 is rotated by the width of the swing (
For example, when the third grindstone 13 is raised upward by about 100 mm or more (for example, about 40 mm or less) and then moved about 30 mm to the right, the third grindstone 13 comes into pressure contact with the dresser grindstone (not shown) that polishes the grindstone I3. become. At this time, all other motors are stopped, and a motor (not shown) that drives this dresser grindstone is driven. As a result of this polishing, a new surface is exposed as shown in FIG. 5(C), and the polishing performance of the grindstone returns to its original state and becomes good. Next, this third grindstone 13 returns to its original position by drawing a reverse trajectory. after that,
If other grindstones are dressed in the same manner, the surface of the flat steel material can be well polished as in the initial state.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram schematically showing the main parts and polishing mechanism of the flat steel material polishing apparatus according to the embodiment, Fig. 2 is a plan view of the polishing apparatus according to the embodiment, and Fig. 3 is shown in Fig. 2. I-1" is a front view seen from the direction of the arrow, FIG. 4 is an explanatory diagram showing a state in which a flat steel material is polished between two grinding wheels, and FIG. A cross-sectional view, (B) is an explanatory cross-sectional view showing the worn state in this example, (C) is a cross-sectional view.
FIG. 2 is an explanatory sectional view showing a dressed state. l; Polishing mechanism, 11.12.13.14; Grindstone 2; Guide mechanism, 21-28; Guide roller, 3: Correction mechanism, 4
; Grinding wheel drive motor; 5; Cutting motor; 6; Swing motor; 7; Base; 8; Base 9: flat steel material. Patent applicant: Aichi Steel Co., Ltd. Representative: Patent attorney Kiyoji Kojima Figure 3

Claims (2)

[Claims] (1) A polishing device that simultaneously polishes four surfaces of a flat steel material running while being applied with tension in the longitudinal direction, and each first grindstone for polishing each of the four surfaces on both the upper and lower sides of the flat steel material; A polishing mechanism consisting of a second whetstone, a third whetstone, and a fourth whetstone; a guide mechanism consisting of a plurality of guide rollers that guide the proper feeding of the flat steel material; A simultaneous four-sided precision polishing device for flat steel material, characterized in that it is equipped with a swinging mechanism for moving the material. (2) A first correction mechanism, a second correction mechanism, and a third correction mechanism that automatically correct the wear amount of each grindstone caused by polishing each surface of a flat steel material according to the polishing feed length of the flat steel material; The simultaneous four-sided precision polishing apparatus for flat steel material according to claim 1, further comprising a correction mechanism consisting of a fourth correction mechanism.