JPH09155702A - Grinding device and method for cylindrically formed body with bottom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid interference between a main-spindle-head of a formed body and a grinding wheel in a grinding system, in which an upper peripheral surface and a pipe-bottom outer surface of a cylindrically formed body and ground by a disc-formed grinding wheel, by forming both a cylindrical part grinding plane and a piper bottom grinding plane within one and the same grinding stone. SOLUTION: A grinding part 2 of a grinding device 1 consists of a grinding wheel disk 30 and a grinding head 4 for rotating the stone 30. A cylinder part grinding plane 32 and a pipe bottom part grinding plane 33 are formed integrally with the grinding stone 30. The pipe bottom part grinding plane 33 is formed by a recessed part 9, which is formed by cutting off the lower corner part, which lies near to the surface of a main spindle head 11, out of the peripheral surface of the grinding stone 30, ranging over its entire periphery. As for a formed body as a body to be ground, it is held first by an installing part 46 of a formed-body attaching/detaching mechanism 40, then pushed by a pusher 48, and finally held through sucking by a formed-body holding body 12 by using vacuum force acting on an air passing hole 14 on account of air-suction by a vacuum pump.

Description

Detailed Description of the Invention

[0001]

[0001] The present invention relates to a grinding apparatus and a grinding method for performing surface grinding of a bottomed cylindrical formed body made of ceramics or the like.

[0002]

2. Description of the Related Art A bottomed cylindrical molded body made of ceramics or the like may be required to have a smooth surface depending on its application. For example, the surface of a β-alumina tube of a sodium-sulfur battery is preferably subjected to a smoothing process from the viewpoint of battery life, battery characteristics, mechanical strength, and the like.

[0003] Surface grinding is generally performed as a smoothing process. Conventionally, surface grinding of a cylindrical body with a bottom is performed by processing the bottom of the tube and the cylindrical portion using two devices,
Alternatively, for example, a grinding device as shown in FIG. 10A or 10B is used. In FIGS. 10A and 10B, the grinding device 1 includes a grinding unit 2 and a molded body holding unit 3. The grinding unit 2 has a structure in which a disk-shaped grinding wheel 5 for cylindrical portion grinding and a grinding wheel 6 for tube bottom grinding are attached to both sides of a grinding wheel head 4 via a shaft 7. The grinding surface is formed by the peripheral surface 8 of the grinding wheel 5 for grinding the cylindrical portion and the surface 10 of the notch 9 provided over the entire periphery of the disk of the grinding wheel 6 for grinding the bottom of the tube. On the other hand, the molded body holding unit 3 includes the spindle head 1.
1 is provided with a columnar molded body holder 12 attached thereto. It should be noted that the molded body holding body 12 has openings 1 at both ends.
3 having an air suction hole 14.

The grinding wheel 5 for grinding a cylindrical portion and the grinding wheel 6 for grinding a tube bottom rotate around a shaft 7 by the operation of a grinding wheel head 4. On the other hand, the molded body holder 12 rotates around the central axis of the molded body holder 12 by the operation of the spindle head 11.

When performing surface grinding of a bottomed cylindrical molded body, as shown in FIG. 11, the molded body holding body 12 is inserted into the cylindrical portion of the bottomed cylindrical molded body 15 to form the molded body 15 Is attached to the molded body holder 12. At this time, the air is suctioned from the main spindle head side through the air suction holes 14 so that the mounting of the molded body 15 to the molded body holding body 12 is strengthened. The molded body opening end face 16 and the molded body holding body 12
A rubber ring 18 is disposed between the rubber ring 18 and a flange 17 provided on the main spindle head side, and the molded body opening end face 16 is pressed against the rubber ring 18 by air suction. It is possible to avoid a situation in which the molded body 15 idles.

In the grinding, the surface of the molded body is ground while moving the molded body 15 in parallel with the center axis thereof while rotating the grindstone 5 for grinding the cylindrical portion, the grinding stone 6 for grinding the bottom of the tube, and the molded body 15. This is performed by pressing against the grinding surfaces 8 and 10 of the grindstones 5 and 6. The cylindrical portion outer peripheral surface 19 of the molded body 15 is ground by the cylindrical portion grinding wheel 5, and the tube bottom outer surface 20 is ground by the tube bottom grinding wheel 6. The grinding of the outer peripheral surface 19 of the cylindrical portion and the grinding of the outer surface 20 of the tube bottom are performed separately. In addition, the degree of movement and grinding of the molded body 15 is automatically controlled based on the entire length of the molded body holder 12 and is mechanically performed.

In the above grinding apparatus 1, the compact 15
The attachment / detachment to / from the molded body holding body 12 is performed using an attachment / detachment device (not shown). That is, the molded body 1 is formed by the gripper.
The gripper is mechanically moved while holding the peripheral surface of 5 to mount the molded body 15 to the molded body holding body 12.

[0008]

However, in the conventional grinding apparatus 1, since the grindstone 5 for cylindrical part grinding and the grindstone 6 for tube bottom part grinding are separately installed on both sides of the grindstone head 4, one grinding grindstone is used. It is necessary to prevent the spindle head 11 and the molded body 15 from coming into contact with the other grinding grindstone when grinding is performed by using, so that there are many restrictions on the configuration of the apparatus. Also, because of these constraints,
Depending on the size of the molded body, it may be practically impossible to perform the grinding process.

For example, the grinding device 1 shown in FIG.
In the above, the entire length L _{W of the} compact 15 is
Is larger than the distance L _G , the grinding of the outer peripheral surface of the cylindrical portion near the opening end of the molded body 15 is difficult.
Since the tip end of 5 was in contact with the grindstone 6 for grinding the bottom of the tube, it was impossible to grind the entire outer peripheral surface of the cylindrical portion.

Further, as a problem common to the grinding devices shown in FIGS. 10A and 10B, the absolute difference between the radius R _B of the grinding stone 6 for tube bottom portion and the radius R _C of the grinding stone 5 for cylindrical portion is absolute. value,
If the radius R _A of the spindle head 11 is smaller than the radius R _A, there is a possibility that the spindle head 11 contacts the grinding wheel 5 or 6.

Further, in the conventional grinding apparatus 1, the molded body opening end face 16 is pressed against the rubber ring 18 by adsorbing and holding the molded body 15 to the molded body holding body 12, and the molded body open end face 16 is moved to the rubber ring 18. It was fixed to. Therefore, the space 21 must always be created between the tube bottom of the molded body 15 and the tip of the molded body holding body 12. When the tube bottom of the molded body 15 and the tip of the molded body holding body 12 are brought into contact with each other, it becomes impossible to press the open end surface 16 of the molded body against the rubber ring 18, and therefore the molded body 15 idles during grinding. Or, the molded body 15 may be offset by an amount corresponding to the clearance between the molded body 15 and the molded body holding body 12, and as a result, grinding scratches or cracks may occur in the molded body 15. is there.

However, as described above, the degree of movement and grinding of the molded body 15 is automatically controlled based on the entire length of the molded body holding body 12. Therefore, the tube bottom portion of the molded body 15 and the molded body holding body are controlled. When the space 21 is provided between the molded body holder 12 and the molded body holder 12 having a variation in inner length, grinding is performed based on the entire length of the molded body holder 12. Therefore, there is a problem that the wall thickness of the tube bottom portion changes depending on the inner length of the molded body 15.

Further, in the conventional grinding device 1, since the attachment / detachment of the molded body 15 to / from the molded body holding body 12 is performed while the molded body 15 is held by a gripper (not shown), the gripping strength is improved. If it is too strong, the molded body 15 will be damaged,
If the gripping strength is too weak, the clearance between the molded body 15 and the molded body holding body 12 is small, so that the gripper slips on the outer peripheral surface of the molded body and cannot be mounted. It is not easy to adjust the gripping strength. . Also, as mentioned above,
Since the clearance between the molded body 15 and the molded body holding body 12 is small, it is necessary to move the gripper in a state where the axis of the molded body 15 and the axis of the molded body holding body 12 are substantially aligned with each other. It is difficult to make them coincide with each other, which has been an obstacle to improving the efficiency of the grinding process.

[0014]

Means for Solving the Problem The present invention solves the above-mentioned inconveniences and provides a grinding device and a grinding method for a bottomed cylindrical molded body in which the spindle head and the molded body do not interfere with the grinding wheel during grinding. The purpose is to provide. Further, even when a molded product having a variation in inner length is ground, the wall thickness does not fluctuate at the bottom of the tube, and the molded product of the molded product does not need to be aligned with the shaft of the molded product. An object of the present invention is to provide a grinding device and a grinding method for a bottomed cylindrical molded body that can be mounted on a holding body and that does not risk damaging the molded body.

That is, according to the present invention, there is provided a grinding portion including a disk-shaped grinding wheel having an appropriate thickness and a grinding wheel head for rotating the grinding wheel, and a cylindrical portion grinding surface and a tube formed on the grinding wheel. A grinding device for a cylindrical molded body with a bottom, which grinds the outer peripheral surface of the cylinder upper part and the outer surface of the tube bottom part of the cylindrical molded body with a bottom surface, respectively. Provided is a grinding device for a bottomed cylindrical molded body formed on a grindstone. In the above grinding apparatus, a spindle head for rotating a bottomed cylindrical compact is provided, and a tube bottom grinding surface is a peripheral surface portion located near the surface of the grinding wheel on the spindle head side, and a margin of the surface. Radius of curvature (R) formed by cutting out the entire circumference
It is preferable that the surface of the recessed portion having a groove is formed, and the grinding surface of the cylindrical portion be a portion located near the other surface of the peripheral surface of the grinding wheel.

Further, according to the present invention, a grinding unit for grinding a bottomed cylindrical compact, and a cylindrical compact holder,
Molded body holding which is composed of a spindle head that supports and rotates the molded body holding body at one end thereof, and holds the molded body holding body by inserting the molded body holding body into the cylindrical molded body having a bottom. And a ring-shaped member for supporting an opening end surface of the bottomed cylindrical molded body, one end of which is supported by the spindle head and the other end of which is the ring. An elastic member for supporting the shaped member is provided on the peripheral surface of the molded body holding body, and the molded body holding body has air passage holes having openings in the vicinity of both ends thereof, and the opening on the spindle head side is formed. Of the bottomed cylindrical molded body, the force of which the elastic member pushes the opening end face is smaller than the force of the air suctioning means to suck the bottomed cylindrical molded body. A grinding device is provided. In the above grinding device, the elastic member is preferably a spring or rubber. Further, it is preferable to provide a rubber member for supporting the bottomed cylindrical molded body near the tip of the molded body support.

Further, according to the present invention, a grinding unit for grinding a bottomed cylindrical molded body, and a cylindrical molded body holding body,
Molded body holding which is composed of a spindle head that supports and rotates the molded body holding body at one end thereof, and holds the molded body holding body by inserting the molded body holding body into the cylindrical molded body having a bottom. And a ring-shaped member for supporting an opening end surface of the bottomed cylindrical molded body, one end of which is supported by the spindle head and the other end of which is the ring. An elastic member for supporting the shaped member is provided on the peripheral surface of the molded body holding body, and the molded body holding body has air suction holes having openings in the vicinity of both ends thereof, and in the vicinity of the end on the spindle head side thereof. , And an air introduction hole having an opening on the peripheral surface, the opening on the spindle head side of the air suction hole is connected to air suction means, and the opening on the spindle head side of the air introduction hole is compressed air. Connected to the introduction means, In the state where the bottomed cylindrical molded body is attached to the body, a rubber member provided for supporting the bottomed cylindrical molded body in the vicinity of the front end of the molded body holding body has the air suction hole and the air introduction hole. There is provided a grinding device for a cylindrical molded body with a bottom that blocks the communication between the two.

In the above grinding apparatus, the grinding portion is composed of a disk-shaped grinding wheel having an appropriate thickness and a grinding wheel head for rotating the grinding wheel, and a cylindrical surface grinding surface and a tube bottom grinding surface formed on the grinding wheel. The outer peripheral surface of the cylinder upper portion and the outer surface of the tube bottom portion of the bottomed cylindrical molded body are each ground by the surface, and the tube bottom surface is a peripheral surface portion located near the surface of the grinding wheel on the spindle head side, and the above. The surface of the concave portion having a predetermined radius of curvature (R) formed by cutting out the peripheral portion of the surface over the entire circumference, and the grinding surface of the cylindrical portion is near the other surface of the peripheral surface of the grinding wheel. It is preferably composed of located parts.

Further, according to the present invention, there is provided a method of grinding a bottomed cylindrical molded body using the above grinding device.
In the above grinding method, it is preferable to grind the outer surface of the tube bottom portion of the bottomed cylindrical molded body, and then grind the outer peripheral surface of the cylinder upper portion of the bottomed cylindrical molded body from the tube bottom side toward the opening end side. Further, while sucking air from the air passage hole or the air suction hole, the bottomed cylindrical molded body is mounted on the molded body holder, and the bottomed cylindrical molded body is ground, and the air passage hole or the air introduction hole is introduced. It is preferable to remove the bottomed cylindrical molded body from the molded body holding body while introducing compressed air through the holes.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION In the grinding apparatus of the present invention, the grinding surface of the cylindrical portion and the grinding surface of the tube bottom are formed on the same grinding wheel. Therefore, unlike the conventional grinding machine in which the grinding surface of the cylindrical portion and the grinding surface of the pipe bottom are formed on different grinding wheels, the spindle head or the formed body and the grinding wheel do not interfere with each other during the grinding process. It is possible to avoid restrictions on the configuration and the dimensions of the molded body, and consequently reduce the manufacturing cost of the grinding device.

FIG. 2 shows an example of a grinding wheel used in the grinding apparatus of the present invention. In the grinding wheel 30 shown in FIG. 2, for example, the tube bottom grinding surface 33 is formed by cutting a portion of the peripheral surface of the grinding wheel 30 located on one surface side and a peripheral portion of the surface over the entire circumference. It is formed by the surface of the concave portion 31 having a predetermined radius of curvature (R) that is formed by cutting.
The cylindrical portion grinding surface 32 is formed by, for example, a portion located on the other surface side of the peripheral surface of the grinding wheel 30. The size of the radius of curvature (R) is determined by the radius of curvature (R) of the tube bottom portion of the molded body.

When performing grinding using the above-mentioned grinding device, first, the outer surface of the tube bottom portion of the molded body is ground, and then the molded body is moved to move the molded body from the tube bottom side toward the opening end side, and the cylinder upper portion. The outer peripheral surface is ground. Therefore, the moving distance of the compact in the grinding process can be reduced and the time required for the grinding process can be shortened as compared with the conventional grinding device. In addition, since the direction of the force acting on the molded body by suction and the direction of the force applied to the molded body by the movement of the molded body are the same, there is an advantage that grinding can be performed without impairing the suction holding effect.

Further, in the present invention, as shown in FIGS. 3 (a) and 3 (b), the grinding device for a cylindrical molded body with a bottom has a ring-shaped member 34 and one end for supporting the open end surface 16 of the molded body 15. Is supported by the spindle head 11 and the other end of the elastic member 35 supports the ring-shaped member 34.
Prepare for the peripheral surface of 2. Further, the molded body holder 12 has air passage holes 36 having openings 13 near both ends thereof, and the opening 13 on the spindle head 11 side is connected to the air suction means and the compressed air introducing means.

Therefore, the molded body 15 is moved to the molded body holding body 12 by sucking air through the air passage hole 36.
At the same time, the elastic member 35 presses the open end surface 16 of the molded body 15 in the direction opposite to the suction direction, so that the tube bottom of the molded body 15 and the tip of the molded body holding body 12 are in contact with each other. It becomes possible to support the open end surface 16 of the body 15. Therefore, it is possible to prevent breakage of the molded body 15 due to idling of the molded body 15 during grinding, and to prevent variation in wall thickness at the pipe bottom even when a molded body having a variation in inner length is ground. be able to.

The elastic member 35 is preferably a spring or rubber, but it is necessary that the force by which the elastic member 35 pushes back the opening end surface 16 of the molded body 15 is smaller than the force of the air suction means for sucking the molded body. Therefore, it is necessary to select a spring or rubber having an appropriate spring constant or compressibility. Further, it is preferable that the surface of the ring-shaped member 34 that contacts the opening end of the molded body is made of a material such as rubber or resin.

Even when the molded body 15 is mounted on the molded body holding body 12, by performing suction by the air suction means,
The molded body 15 can be mounted only by inserting the tip of the molded body holder 12 into the opening of the molded body 15. Therefore, it is possible to easily mount the molded body 15 without making the axis of the molded body 15 and the axis of the molded body holding body 12 coincide with each other. Therefore, it is not necessary to hold the molded body 15 by the gripper, and the molded body 15 Since the risk of damaging the mold is eliminated and a device for attaching / detaching the molded body 15 is simple, the cost required for the grinding process can be reduced.

After the grinding, the compressed air is introduced by the compressed air introducing means through the air passage hole 36, so that the molded body 15 can be easily removed from the molded body holding body 12.

In the above grinding apparatus, the molded body holding body 12 is, as shown in FIGS. 4A and 4B, a rubber member 37 for supporting the bottomed cylindrical molded body in the vicinity of its tip. Is preferably provided. By providing the rubber member 37, it is possible to prevent slippage between the molded body tube bottom portion and the molded body holding portion. Further, it is possible to avoid the possibility that the molded body is damaged due to the contact between the tube bottom of the molded body and the tip of the molded body holding body 12.

In the above grinding apparatus, the air passage holes were used for both suction and introduction of air.
The air suction hole and the air introduction hole may be provided separately.

In the present invention, for example, a compressor or the like is used as the compressed air introduction means, and a vacuum pump or the like is used as the air suction means.

[0031]

Hereinafter, the present invention will be described in more detail with reference to the illustrated embodiments, but the present invention is not limited to these embodiments.

A beta-alumina tube molded body for a sodium-sulfur battery having a bottomed cylindrical shape was ground using the above-mentioned grinding device. 47.5mm outside diameter, 43.0mm inside diameter
A molded body having an inner diameter of 430 mm and a wall thickness of 5 mm was ground to 47.0 mm in outer diameter and 3 mm in wall thickness. The ground compact was manufactured using a mandrel having an inner diameter of 42.8 mm using a dry CIP molding apparatus.

The configuration of the grinding machine used in this example is shown in FIG. The grinding device 1 includes a grinding unit 2 and a compact holding unit 3 and includes a compact attaching / detaching mechanism 40.

The grinding unit 2 includes a disk-shaped grinding wheel 30 and a grinding wheel head 4 that rotates the grinding wheel 30. The grinding wheel 30 has a cylindrical portion grinding surface 32 and a tube bottom grinding surface 3.
3 is integrally formed. The pipe bottom grinding surface 33 is a part of the spindle head 11 of the formed body holding unit 3 of the peripheral surface of the grinding wheel.
And a surface 10 of a concave portion 9 having a radius of curvature (R) of 47.0 mm formed by cutting out the periphery of the surface and the periphery of the surface over the entire circumference. On the other hand, the cylindrical portion grinding surface 32 is composed of a portion located on the other surface side of the peripheral surface of the grinding wheel 30. The grindstone head 4 drives the shaft 7 to
45 m / min. The grinding wheel 30 is rotated at the peripheral speed of (1885 rpm).

The molded body holding portion 3 is formed by attaching a cylindrical molded body holding body 12 having an outer diameter of 42.9 mm to the spindle head 11, and the molded body holding body 12 has an opening 13 at both ends inside thereof. The air passage hole 14 having The opening 13 of the air passage hole 14 on the spindle head 11 side is connected to a vacuum pump (not shown) and a compressor (not shown) via a three-way valve (not shown). Further, the molded body holder 12 has a rubber ring-shaped member 44 and a closed-cell closed rubber 45 capable of volumetric shrinkage on the peripheral surface of the spindle head 11 side.

The spindle head 11 rotates the molded body holder 12 at 500 rpm. The ring-shaped member 44 supports the opening end surface of the mounted molded body, and the closed-cell internal rubber 45
Is supported by the spindle head 11 at one end and the ring-shaped member 44 at the other end. The closed-cell embedded rubber 45 can cope with the variation in the inner length of the molded body up to 0.5 mm.

The molded body attaching / detaching mechanism 40 includes the molded body mounting portion 4
6, a molded body take-out part 47, and a pusher 48.

The grinding unit 2 can move only in the direction perpendicular to the axis of the molded body holder 12. Mold holding part 3
Can move only parallel to the axis of the molded body holding body 12. Further, the molded body attaching / detaching mechanism 40 is provided for the molded body holder 12.
Can be moved in both directions perpendicular and parallel to the axis. In the grinding by the grinding device used in this example, the attachment / detachment of the molded body to / from the molded body holding unit, the grinding of the molded body, and the like are all N
It is done automatically by the C program.

Grinding of the molded body was performed as follows.

First, the molded body was mounted on the molded body holding portion. The molded product formed by the dry CIP forming device is conveyed by a conveyor (not shown) and transferred by a transfer device (not shown).
As shown in FIG. 5, the molded body mounting portion 4 of the molded body attaching / detaching mechanism 40.
Transferred to No. 6. Next, as shown in FIG. 6, the molded body 15 was pushed out by the pusher 48 to a position where the open end of the molded body 15 was in close contact with the tip of the molded body holding body 12. At the same time, air suction by a vacuum pump was started via the air passage 14 of the molded body holder 12, and the molded body 15 was mounted on the molded body holder 12. In this state, the compact 15
The inner surface of the bottom of the tube comes into contact with the tip of the molded body holding body 12.

Next, the molded body was ground. First, while rotating the spindle head 11 of the molded body holding unit 3,
The molded body holding part 3 was moved to position the molded body 15 at a predetermined grinding start position. Next, the rotating grinding wheel 30 is brought close to the molded body 15, and the tube bottom surface 32 of the grinding wheel 30 is ground.
The central axis A of the above was arranged at a position corresponding to the central axis of the molded body holding body 12. As shown in FIG. 7, while gradually moving the molded body holding portion 3 toward the grinding wheel 30, the outer surface of the tube bottom of the molded body was ground by the tube bottom grinding surface 33 of the grinding wheel 30. The amount of air cut from the grinding start position until the outer surface of the tube bottom of the compact 15 contacted the grinding wheel 30 was 1 mm. Further, the moving speed of the molded body holding portion 12 during grinding is 80
It was mm / min. The grinding was performed in a state in which the molded body attaching / detaching mechanism 40 was moved in a direction opposite to that of the molded body holding unit 3 in order to prevent the adhesion of grinding dust to the molded body attaching / detaching mechanism 40. Further, the molded body attaching / detaching mechanism 40 was moved in a direction perpendicular to the axis of the molded body holder 3, and the molded body take-out portion 47 was disposed on an extension of the central axis of the molded body holder 12.

Next, the grinding wheel 30 was moved, and the cylindrical surface 32 was placed at a predetermined grinding start position. Molded body 1
Grinding of the outer peripheral surface of the cylindrical portion 5
/ Min. Then, as shown in FIG. 8, it was moved from near the tube bottom toward the opening.

After the grinding was completed, the compact holding unit 3 and the grinding unit 2 were returned to their original positions, and the rotation of the spindle head 11 of the compact holding unit 2 was stopped.

Finally, the molded body 15 is replaced with the molded body holding body 12.
Removed from The three-way valve was switched to the compressor side, compressed air was introduced from the air passage port 14, and the molded body 15 after grinding was pushed out to the molded body take-out portion 47 of the molded body attaching / detaching mechanism 40 as shown in FIG. The portion where the molded body take-out portion 47 and the molded body 15 come into contact with each other is formed by covering the vinyl sheet on the sponge.
The impact that the molded body 15 receives when the molded body 15 is extruded can be alleviated, and the friction when the molded body 15 is moved is reduced.

By the above grinding apparatus and grinding method,
As a result of grinding 400 compacts, the average value (X) of the tube bottom wall thickness of the compact after grinding was 3.01 mm, and the variation (σ _n-1 ) was 0.04 mm. The average value (X) of the outer diameter of the cylindrical portion is 46.99 mm, and the variation (σ _n-1 )
Was 0.01 mm. Also, no scratches or cracks caused by the grinding were observed.

[0046]

According to the present invention, since the grinding surface of the cylindrical portion and the grinding surface of the tube bottom portion are formed on the same grinding wheel, the spindle head and the molded body do not interfere with the grinding wheel during grinding, It is possible to avoid restrictions on the structure of the device and the size of the molded body as in the related art. Therefore, it is possible to reduce the manufacturing cost of the grinding device and
The moving distance of the molded body in the grinding step can be shortened, and the time required for the grinding step can be shortened.

Further, in the present invention, since the elastic member is provided, it is possible to support the open end surface of the molded body in a state where the molded body tube bottom portion and the molded body holding body tip are in contact with each other. Even when a molded product having a variation in inner length is ground, it is possible to prevent the wall thickness from varying at the bottom of the pipe.

Further, in the present invention, since the molded body is mounted on the molded body holding body by air suction, the molded body can be easily mounted without the axis of the molded body and the axis of the molded body holding body being aligned. Therefore, it is not necessary to hold the molded body by the gripper, the risk of damaging the molded body is eliminated, and the device for attaching and detaching the molded body is simple, so that the cost for the grinding process can be reduced. .

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a grinding apparatus for a cylindrical molded body with a bottom according to the present invention.

FIG. 2 is a perspective view showing an example of a grinding wheel used in a grinding device for a cylindrical molded body with a bottom according to the present invention.

FIG. 3 (a) is an explanatory view showing a mounting state of a bottomed cylindrical compact on a compact holder in an example of a bottomed cylindrical compactor of the present invention. (B) It is explanatory drawing which shows the mounting state to the molded body holding body of the cylindrical molded body with a bottom in the other example of the grinding device of the cylindrical molded body with a bottom of this invention.

FIG. 4 (a) is an explanatory view showing an example of a molded body holder provided with a rubber member at its tip. (B) It is explanatory drawing which shows the other example of the molded body holder which provided the rubber member in the front-end | tip part.

FIG. 5 is an explanatory view showing a process of mounting a bottomed cylindrical molded body on a molded body holding portion by using an example of a bottomed cylindrical molded body grinding apparatus of the present invention.

FIG. 6 is an explanatory view showing a step of mounting a bottomed cylindrical molded body on a molded body holding portion using an example of the apparatus for grinding a bottomed cylindrical molded body of the present invention.

FIG. 7 is an explanatory view showing a step of grinding the outer surface of the tube bottom portion of the bottomed cylindrical molded body using an example of the bottomed cylindrical molded body grinding apparatus of the present invention.

FIG. 8 is an explanatory view showing a step of grinding the outer peripheral surface of the cylindrical portion of the bottomed cylindrical molded body using an example of the bottomed cylindrical molded body grinding apparatus of the present invention.

FIG. 9 is an explanatory view showing a step of removing the bottomed cylindrical molded body from the molded body holding portion in the example of the bottomed cylindrical molded body grinding apparatus of the present invention.

FIG. 10 (a) is a plan view showing an example of a conventional grinding apparatus for a bottomed cylindrical molded body. (B) It is a top view which shows a part of other examples of the grinding apparatus of the conventional cylindrical molding with a bottom.

FIG. 11 is a cross-sectional view showing an example of a method of fixing a bottomed cylindrical compact to a compact holder in a conventional bottomed cylindrical compactor.

[Explanation of symbols]

1 ... Grinding device for cylindrical molded body with bottom, 2 ... Grinding part, 3 ...
・ Molded body holding part, 4 ・ ・ ・ Whetstone head, 5 ・ ・ ・ Wheel for cylindrical part grinding, 6 ・ ・ ・ Wheel for tube bottom grinding, 7 ・ ・ ・ Shaft, 8 ・ ・ ・ Wheel of cylindrical part grinding wheel Surface, 9: Notch, 10: Surface of notch, 11: Spindle head, 12: Holder for molded body, 13 ...
-Opening part, 14 ... Air suction hole, 15 ... Bottomed cylindrical molded body, 16 ... Opened end surface of bottomed cylindrical molded body, 17 ... Flange, 18 ... Rubber ring, 19 ... Cylindrical part outer peripheral surface, 20
... Tube bottom outer surface, 21 ... space, 30 ... grinding wheel, 31
..Recessed part, 32: grinding surface of cylindrical part, 33: grinding surface of pipe bottom,
34 ... Ring-shaped member, 35 ... Elastic member, 36 ... Air passage hole, 37 ... Rubber member, 38 ... Air suction hole, 39
・ ・ ・ Air introduction hole, 40 ・ ・ ・ Molded body attaching / detaching mechanism, 44 ・ ・ ・ Ring-shaped member, 45 ・ ・ ・ Rubber with closed cells, 46 ・ ・ ・ Molded body mounting part, 47 ・ ・ ・ Molded body taking out part , 48 ... Pusher.

Claims (10)

[Claims] 1. A grinding unit comprising a disk-shaped grinding wheel having an appropriate thickness and a grinding wheel head for rotating the grinding wheel, and a bottom surface is formed by a cylindrical grinding surface and a pipe bottom grinding surface formed on the grinding wheel. A grinding device for a cylindrical molded body with a bottom, which grinds the outer peripheral surface of the cylinder upper part and the outer surface of the tube bottom part of the cylindrical molded product, wherein the grinding surface of the cylindrical part and the grinding surface of the tube bottom are formed on the same grinding wheel. An apparatus for grinding a cylindrical molded body with a bottom, which is characterized by: 2. A spindle head for rotating the bottomed cylindrical molded body, wherein the tube bottom grinding surface is a peripheral surface portion located near the surface of the grinding wheel on the spindle head side, and a side of the surface. A portion which is composed of a surface of a recess having a predetermined radius of curvature (R) formed by cutting out the edge portion over the entire circumference, and the grinding surface of the cylindrical portion is located in the vicinity of the other surface of the peripheral surface of the grinding wheel. The grinding device for a cylindrical molded body with a bottom according to claim 1, comprising: 3. A grinding unit for grinding a bottomed cylindrical molded body,
And a columnar molded body holder, and a spindle head for supporting and rotating the molded body holder at one end thereof, and by inserting the molded body holder into the bottomed cylindrical molded body, A grinding device for a bottomed cylindrical molded body, comprising: a molded body holding portion for holding a bottom cylindrical molded body; and a ring-shaped member and one end for supporting an open end surface of the bottomed cylindrical molded body. An elastic member, which is supported by the spindle head and the other end of which supports the ring-shaped member, is provided on the peripheral surface of the molded body holder, and the molded body holder has air passages having openings near both ends thereof. The main shaft head side opening has a hole and is connected to the air suction means and the compressed air introducing means, and the elastic member pushes the opening end face by the air suction means to suck the bottomed cylindrical molded body. Characterized by being less than Grinding device that bottomed cylindrical molded body. 4. The grinding device for a cylindrical molded body with a bottom according to claim 3, wherein the elastic member is a spring or rubber. 5. The grinding apparatus for a cylindrical molded body with a bottom according to claim 3, further comprising a rubber member for supporting the cylindrical molded body with a bottom near the tip of the molded body holder. 6. A grinding unit for grinding a bottomed cylindrical molded body,
And a columnar molded body holder, and a spindle head for supporting and rotating the molded body holder at one end thereof, and by inserting the molded body holder into the bottomed cylindrical molded body, A grinding device for a bottomed cylindrical molded body, comprising: a molded body holding portion for holding a bottom cylindrical molded body; and a ring-shaped member and one end for supporting an open end surface of the bottomed cylindrical molded body. An elastic member, which is supported by the spindle head and the other end of which supports the ring-shaped member, is provided on the peripheral surface of the molded body holding body, and the molded body holding body has air suction with openings near both ends thereof. The hole and the vicinity of the end on the spindle head side,
And an air introduction hole having an opening on the peripheral surface, the opening on the spindle head side of the air suction hole is connected to air suction means, and the opening on the spindle head side of the air introduction hole is compressed air. A rubber member that is connected to the introducing means and is provided to support the bottomed cylindrical molded body in the vicinity of the tip of the molded body holding body when the bottomed cylindrical molded body is mounted on the molded body holding body. However, the grinding device for a bottomed cylindrical molded body is characterized in that the communication between the air suction hole and the air introduction hole is blocked. 7. The grinding part comprises a disk-shaped grinding wheel having an appropriate thickness and a grinding wheel head for rotating the grinding wheel, and a bottom surface is formed by a cylindrical grinding surface and a pipe bottom grinding surface formed on the grinding wheel. The outer peripheral surface of the cylinder top and the outer surface of the tube bottom of the cylindrical molded body are each ground, and the tube bottom grinding surface is a peripheral surface portion located near the surface of the grinding wheel on the spindle head side, and the edge of the surface. From the surface of a recess having a predetermined radius of curvature (R) formed by cutting out the entire circumference of the portion, and the cylindrical grinding surface is located near the other surface of the peripheral surface of the grinding wheel. The grinding apparatus for a cylindrical molded body with a bottom according to any one of claims 3 to 6. 8. A grinding method for a bottomed cylindrical molded body, which comprises using the grinding device for a bottomed cylindrical molded body according to any one of claims 1 to 7. 9. The cylindrical outer peripheral surface of the bottomed cylindrical molded body is ground from the tube bottom side toward the opening end side after grinding the outer surface of the tube bottom portion of the bottomed cylindrical molded body. Method for grinding a bottomed cylindrical molded body. 10. The bottomed cylindrical molded body is attached to the molded body holding body and the bottomed cylindrical molded body is ground while sucking air through the air passage hole or the air suction hole. The grinding method for a bottomed cylindrical compact according to claim 8 or 9, wherein the bottomed cylindrical compact is removed from the compact holder while introducing compressed air from the air passage hole or the air introduction hole.