JPH0825219A - Grinding machine - Google Patents

Abstract

PURPOSE:To prevent the scattering of a grinding liquid fed at the time of grinding and remove various ill effects caused by the scattering of the grinding liquid. CONSTITUTION:This grinding machine is provided with a work rest 33 supporting and rotatively driving a die 11 (14) a grinding wheel 22 grinding the cemented carbide insert 17 of the die 11 (14) while a grinding liquid is fed, and a work cover 53 surrounding the work rest 33 except for a grinding wheel access path 51 and a discharge port 52 discharging the grinding liquid fed at the time of grinding. At least the front cover section 55 of the work cover 53 facing the grinding wheel 22 is made of a transparent member, and a nozzle 59 feeding the grinding liquid is arranged in a space S surrounded by the work cover 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a grinding machine for grinding a surface to be ground such as a die, and more particularly to a grinding machine designed to prevent scattering of a grinding liquid supplied during grinding.

[0002]

2. Description of the Related Art For example, a can body of an aluminum can is formed by a die having a plurality of dies. The main part of the forming process of the can body is schematically shown in FIG. First,
As shown in FIG. 3A, the cup 10 previously narrowed down in the previous step (not shown) is re-formed by the cooperation of the redraw die 11, the punch sleeve 12 and the cup holder sleeve 13 until the cup 10 is almost resized to the outer diameter of the product can. Squeeze. Next, as shown in (B) to (D) of FIG. 3, three ionizing dies 14 (14a, 14b, 14c) referred to as a first ionizing die 14a, a middle ionizing die 14b, and an end ionizing die 14c. Generic name of)
Thus, the side wall of the cup 10 is sequentially ironed. That is, each ionizing die 14 has a punch sleeve 12
In cooperation with the above, the side walls of the redrawing cup 10 redrawn by the redraw die 11 are sequentially ironed.
The side wall becomes thinner each time it passes through each ionizing die 14, and becomes the outer diameter, wall thickness, and flange thickness of the product can when it passes through the final end ionizing die 14c. As shown in the drawing, a steel base metal 15 having a disk shape is provided, and a cemented carbide insert 17 is shrink-fitted in the opening 16 of the base metal 15. Further, the redraw die 11 is similarly configured.

In order to form a high-quality can body, it is necessary to control the die shape, the surface roughness, and the concentricity of the dies 11 and 14 with respect to the outer diameter. When a defect occurs, it is removed from the mold, checked and repaired, and then reused.

For example, the ionizing die 14 is ground by the internal grinding machine 20 as shown in FIG. 5 to the cemented carbide insert 17. For grinding the cemented carbide insert 17, as shown in FIG. 6, the ioning die 14 is attached to the chuck 21 of the inner surface grinding machine 20,
This is done by rotating the grinding wheel 22 relative to the die 14 and moving it back and forth in the axial direction. When grinding the die 14 with a grinding wheel, a grinding liquid is supplied from a nozzle 23 for the purpose of removing chips.

Cemented carbide insert 1 with grinding wheel 22
The grinding allowance of No. 7 is 0.005-0.010m in radius removal allowance.
m, and a diamond grindstone is used as the grinding grindstone 22. Since the inner diameter of the cemented carbide insert 17 increases with grinding, the dies initially used as the end-ioning die 14c are sequentially used as the middle-ioning die 14b and the first-ioning die 14a a plurality of times. It is reused and finally disposed of.

By the way, the chuck 21 is the die 1
The work rest 33 that supports and rotates the work rests 1 and 14 is configured.
As also shown, it is substantially covered by a circular work cover 40. The work cover 40 has a lower outer peripheral cover 41 a and an upper outer peripheral cover 41 b which are divided into two parts, and the lower outer peripheral cover 41 a is fixed to the upper surface of the grinder 20. On the other hand, the upper outer peripheral cover 41b is the lower outer peripheral cover 4
It is openably and closably connected to 1a. The front side of the lower outer peripheral cover 41a (the side facing the grinding wheel 22)
However, a front cover 42 made of a metal that covers a part of the upper outer cover 41b is attached to the front side of the upper outer cover 41b.

The nozzle 23 for supplying the grinding liquid is attached to the tip of a flexible hose 43 provided outside the work cover 40, and is arranged toward the grinding site from the side where the grinding wheel 22 enters during grinding. It has become so. 5 and 6, reference numeral "62" indicates a mist suction hose connected to the large cover 44 for sucking the mist of the grinding fluid.

[0008]

However, in the conventional grinding machine 20, the measure for preventing the dispersion of the grinding fluid supplied during the grinding process is not sufficient, and as shown in FIGS. However, the large cover 44 that covers the work cover 40 is merely provided so as to be movable.

For this reason, the recovery rate of the grinding fluid is poor, and the grinding fluid scattered from the opening 45 formed in the front portion of the work cover 40 or the lower outer peripheral cover 41a grinds the bed surface 46 and the motors M1 and M2. Not only was the panel body soiled, but the switch panel 47 and the floor surface were also soiled.

When cleaning such dirt,
On the contrary, since the large-sized cover 44 is provided, the workability of cleaning the main body of the grinder is poor and it takes a long time to clean.
An increase in cleaning time leads to an increase in a series of working times required for grinding, which also hinders improvement in processing efficiency. Further, since the grinding machine 20 is installed in a room where precision processing and measurement are performed, the dirt caused by the scattering of the grinding fluid also causes a decrease in the work environment.

Further, waste of the grinding liquid due to scattering may be considered. On the contrary, a large amount of grinding fluid is supplied to the grinding wheel 22.
Even if an attempt was made to reduce the clogging of the grinding wheel and to achieve stable dimensional control, the amount of the grinding fluid was increased because the scattering of the grinding fluid was remarkable. The present invention was made in order to solve the problems associated with the above-mentioned conventional techniques, and is intended to prevent the scattering of the grinding fluid supplied during the grinding process, and to eliminate the various adverse effects associated with the scattering of the grinding fluid. The purpose is to provide.

[0012]

SUMMARY OF THE INVENTION To achieve the above object, the present invention has a workpiece rotation supporting means for supporting and rotating a workpiece, and supplying a grinding fluid to the surface to be ground of the workpiece. In a grinding machine that grinds with a grinding wheel while having a cover means that surrounds the workpiece rotation support means except for the entry path of the grinding wheel and the discharge port for discharging the grinding liquid supplied during grinding In the cover means, at least a front cover portion facing the grinding wheel is made of a transparent member, and a supply portion for supplying the grinding liquid is arranged in a space surrounded by the cover means. It is a grinding machine.

The cover means comprises at least an outer peripheral cover part and a front cover part, which are each divided into two parts, and the divided outer peripheral cover parts are openably and closably connected to each other and the divided part. The front cover part is a grinder that is attached to each of the outer peripheral cover parts.

Further, the discharge port of the cover means forms a part of a guide path for guiding the discharged grinding liquid,
In the grinding machine, the grinding liquid supplied from the supply unit is guided to the storage unit in the space surrounded by the cover unit. Further, the cover means further includes
The grinding machine is characterized in that an overhanging portion that projects toward the grinding wheel side from the front cover portion is provided.

[0015]

The grinding liquid is supplied during the grinding of the surface to be ground of the workpiece, but the workpiece rotation supporting means is surrounded by the cover means except the entry path and the discharge port of the grinding wheel,
Further, since the supply part for supplying the grinding liquid is arranged in the space surrounded by the cover means, the amount of the grinding liquid scattered from the front surface portion and the lower portion is reduced. Further, since at least the front cover part facing the grinding wheel of the cover means is made of a transparent member, the condition of the front part of the workpiece rotation support means can be visually judged.

If the cover means is composed of an outer peripheral cover part and a front cover part, each of which is divided into at least two parts, the work such as mounting the work on the work rotation support means can be easily performed. Further, since the grinding fluid supplied from the supply unit is taken into the guide passage from the discharge port and guided to the storage means through these, the amount of the grinding fluid flowing out from the position below the cover means is reduced.

Further, if the overhanging portion is provided, even if the grinding fluid oozes out, the amount of the dropping grinding fluid can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 (A) and 1 (B) show a main part of a grinding machine according to an embodiment of the present invention, and FIG. 1 (A) is a perspective view showing a state in which a work cover is closed, and FIG. 1 (B). 2 is a perspective view showing a state in which a work cover is opened, FIG. 2 is a cross-sectional view showing a main part of the same embodiment, and members common to those shown in FIGS. 3 to 7 are given the same reference numerals. The description is partially omitted.

The grinding machine 20 of the present embodiment has a work rotation supporting means for supporting and rotating the work as in the case of the one shown in FIG. It is an internal grinding machine that grinds with a grinding wheel while supplying it. As the workpiece, as shown in FIGS. 3 and 4, a redraw die 11 and an ioning die 14 which are assembled in a can body forming die can be exemplified, and the openings 1 of these dies 11 and 14 can be exemplified.
6 is a cemented carbide insert 1 corresponding to the inner peripheral surface to be ground.
7 is attached. The grinding wheel 22 is for grinding the inner peripheral surface of the cemented carbide insert 17, and a diamond wheel is used.

The inner surface grinding machine 20 is provided with a work rest (workpiece rotation supporting means) 33 that supports and rotates the dies 11 and 14. This work rest 33
It is surrounded by a circular work cover (cover means) 53 except for the entrance path 51 of the grinding wheel 22 and the discharge port 52 for discharging the grinding liquid supplied during grinding. The work cover 53 has an outer peripheral cover portion 54 which is divided into two and a front cover portion 55 which is divided into two and faces the grinding wheel.

The outer peripheral cover portion 54 has a lower outer peripheral cover 54a and an upper outer peripheral cover 54b, and the lower outer peripheral cover 54a is fixed to the upper surface of the grinder 20. on the other hand,
The upper outer peripheral cover 54b is openably and closably connected to the lower outer peripheral cover 54a via a hinge 56. Further, a rectangular discharge port 52 for discharging the grinding liquid supplied at the time of grinding is formed at the lowermost position of the lower outer peripheral cover 54a.

The front cover portion 55 has a lower front cover 55a and an upper front cover 55b, each of which has a substantially semi-circular shape, and the lower front cover 55a is attached to the front portion of the lower outer peripheral cover 54a. Upper front cover 55
b is attached to the front surface of the upper outer peripheral cover 54b. Semicircular cutouts 57a, 57b are formed in each front cover 55a, 55b, and when the outer peripheral cover portion 54 is closed as shown in FIG.
The entry path 51 of the grinding wheel 22 is formed by a and 57b.

Further, the outer peripheral cover portion 54 is provided with a hood portion (protruding portion) 58 projecting toward the grinding wheel 22 side (front side) from the front cover portion 55. That is, the upper front cover 55b is attached to the upper outer cover 54b.
An upper hood 58b that protrudes further to the front side than the lower hood 58a that protrudes to the front side from the lower front cover 55a is attached to the lower outer peripheral cover 54a.

Of the outer peripheral cover portion 54, the front cover portion 55 and the hood portion 58, at least the front cover portion 55 is
It is made of a transparent material such as acrylic resin so that the front surface of the workrest 33 can be visually confirmed from the outside. In the present embodiment, the front cover portion 55 and the hood portion 58 are made of a transparent material, and the outer peripheral cover portion 54 is
Is formed of a metal material. The front cover part 55 and the hood part 58 are attached to the outer peripheral cover part 54 by an appropriate method such as an adhesive or screw fastening. However, in order to enhance the effect of preventing the scattering, it is preferable to apply a sealant to the gap generated when each part is attached.

Further, in the space S surrounded by the work cover 53, a nozzle (supply unit) 59 for supplying a grinding fluid is arranged, and the nozzle 59 has a flexibility provided by penetrating the upper outer peripheral cover 54b. The hose 43 is connected. The discharge port 52 of the lower outer peripheral cover 54a forms a part of a guide path 60 for guiding the discharged grinding liquid. The grinding fluid supplied from the nozzle 59 into the space S surrounded by the work cover 53 is taken into the hose or drainage groove which forms a part of the guide path 60 from the discharge port 52, and passes through these to the storage means such as a tank. You are guided to 61. The lower hood 5
A plate that forms a storage space for the grinding fluid between the lower front cover 55a and the lower front cover 55a may be further attached, and the storage space may be connected to the guide path 60 via a hose or the like.

Further, the conventional large cover 44 is removed from the grinding machine 20, and the mist suction hose 6 connected to the large cover 44 for sucking the mist of the grinding fluid is used.
The second suction port 62a is arranged close to the grinding wheel entry path 51 of the front cover portion 55.

Further, the grinding machine 20 drives the grinding wheel 22 to rotate and simultaneously reciprocates in the axial direction to drive the grinding wheel side 3.
2 The grindstone-side driving means 32 is composed of a motor M2, a slide table that can move back and forth, and the like. The grinding machine configured as described above operates as follows.

When grinding the dies 11 and 14, first, as shown in FIG.
With the 4b open, the chuck 21 of the work rest 33
Attach the dice 11 and 14 to. Then, the same figure (A)
As shown in FIG.
While supplying a predetermined amount of grinding fluid from 9, the work rest 3
3 is rotationally driven to rotationally drive the dies 11 and 14, while the grinding wheel 22 is rotationally driven by the wheel side driving means 32 in the direction opposite to the rotational direction of the work rest 33. Further, the grinding wheel 22 is reciprocated in the axial direction by the grinding wheel side driving means 32. By these operations, the inner peripheral surface of the cemented carbide insert 17 is ground.

Although the grinding liquid is supplied during the grinding process, the work rest 33 has the approach path 51 for the grinding wheel 22.
And a discharge port 52 and are surrounded by a work cover 53, and a nozzle 59 for supplying a grinding liquid is arranged in a space S surrounded by the work cover 53, and a suction port 62a of a mist suction hose 62 is a grinding wheel. Since it is arranged so as to face the approach path 51, the amount of the grinding fluid scattered from the front surface portion and the lower portion is greatly reduced.

Further, the grinding fluid supplied from the nozzle 59 is guided from the outlet 52 of the lower outer peripheral cover 54a to the guide path 60.
Since it is taken in by a hose or a drainage groove that forms a part of and is guided to the storage means 61 such as a tank through these, the amount of the grinding fluid flowing out from the position below the lower outer peripheral cover 54a to the bed surface 46 and the like is large. Decreased to.

In addition, since the hood portion 58 is provided, even if the grinding fluid seeps out from the slot formed between the upper front cover 55b and the lower front cover 55a, it is guided to the storage means 61 via the hose. Therefore, the amount of the grinding fluid dropped on the bed surface 46 and the like was significantly reduced.

The grinding liquid recovery rate in the conventional grinding machine was 80%, but the grinding liquid recovery rate was 99.9% by providing the work cover 53 described above. In other words, the scattering rate of the grinding fluid is reduced from 20% to 0.1%,
It was possible to greatly improve the prevention of scattering of the grinding fluid.

Since the scattering of the grinding fluid supplied during the grinding process is prevented in this manner, various harmful effects caused by the scattering of the grinding fluid are eliminated. In other words, since the grinder main body and the floor surface are hard to get dirty and the large cover 44 that has been an obstacle to the work even when cleaning is removed, the workability of cleaning the grinder main body is improved and the cleaning time is shortened. You can By shortening the cleaning time, it is possible to shorten the series of working time required for the grinding process and improve the working efficiency. In addition, a good work environment can be maintained by reducing the scattering of the grinding fluid.

Further, it was possible to eliminate the waste of the grinding liquid due to the scattering. On the contrary, since the scattering prevention effect is enhanced, it is possible to supply a large flow rate of grinding fluid that could not be supplied in the past, reduce the clogging of the grinding wheel, and achieve stable dimension control. Becomes

[0035]

As described above, according to the grinding machine of the present invention, it is possible to prevent the scattering of the grinding liquid supplied during the grinding process and to eliminate various adverse effects caused by the scattering of the grinding liquid. Could be provided.

[Brief description of drawings]

1A and 1B show a main part of a grinding machine according to an embodiment of the present invention, and FIG. 1A is a perspective view showing a state in which a work cover is closed. FIG. 1B is a perspective view showing a state where the work cover is opened.

FIG. 2 is a sectional view showing a main part of the embodiment.

3A to 3D are process diagrams showing a main part of a forming process of a can body of an aluminum can.

FIG. 4 is a cross-sectional view showing an ionizing die used for forming a can body.

FIG. 5 is a perspective view showing the external appearance of an inner surface grinding machine that performs a grinding operation on a cemented carbide insert for an ionizing die.

6 is a sectional view showing a main part of the inner surface grinding machine shown in FIG.

FIG. 7 is a perspective view showing a conventional work cover that covers a work rest of an inner surface grinding machine.

[Explanation of symbols]

11, 14 ... Die (workpiece) 17 ... Cemented carbide insert (surface to be ground) 22 ... Grinding grindstone 32 ... Grindstone side driving means 33 ... Work rest (workpiece rotation supporting means) 51 ... Grinding grindstone entry path 52 ... Discharge port 53 ... Work cover (cover means) 54 ... Outer peripheral cover portion (54a ... Lower outer peripheral cover, 54b
... Upper peripheral cover) 55 ... Front cover part (55a ... Lower front cover, 55b
... upper front cover 58 ... hood (overhanging portion, 58a ... lower hood, 58b)
... Upper hood 59 ... Nozzle (supply unit) 60 ... Guideway 61 ... Storage means S ... Space surrounded by work cover

Claims (4)

[Claims] 1. A workpiece rotation supporting means (33) for supporting and rotating the workpiece (11, 14), the surface to be ground (17) of the workpiece (11, 14) being supplied with a grinding liquid. In a grinder that grinds with a grinding wheel (22) while supplying, except for an entrance path (51) of the grinding wheel (22) and a discharge port (52) for discharging the grinding fluid supplied during grinding. A cover means (53) surrounding the workpiece rotation supporting means (33) is provided, and at least the front cover part (55) facing the grinding wheel (22) of the cover means (53) is made of a transparent member. In the space (S) surrounded by the cover means (53),
A grinding machine having a supply unit (59) for supplying the grinding liquid. 2. The cover means (53) is composed of an outer peripheral cover portion (54) and a front cover portion (55), each of which is divided into at least two, and the divided outer peripheral cover portion (54) is The grinding machine according to claim 1, wherein the front cover part (55) which is openably and closably connected to each other and is divided is attached to the outer peripheral cover part (54), respectively. 3. The discharge port (52) of the cover means (53) forms a part of a guide path (60) for guiding the discharged grinding fluid, and is surrounded by the cover means (53). The grinding machine according to claim 1 or 2, wherein the grinding liquid supplied from the supply unit (59) into the space (S) is guided to the storage unit (61). 4. The cover means (53) is further provided with an overhanging portion (58) protruding toward the grinding wheel (22) side with respect to the front cover portion (55). The grinding machine according to any one of claims 1 to 3.