TWI613036B - Roller drum for centrifugal drum machine, manufacturing method thereof, and centrifugal drum grinding machine - Google Patents

Description

Roller drum for centrifugal drum machine, manufacturing method thereof, and centrifugal drum grinding machine

The present invention relates to a drum tank of a centrifugal drum mill, a method of manufacturing the same, and a centrifugal drum mill.

A centrifugal barrel mill is known as a centrifugal mill that performs centrifugal polishing such as trimming, surface roughness adjustment, roundness, and gloss of a workpiece. The centrifugal roller grinder is used to load a block body (refers to all the objects that are loaded into the drum tank. In the case of dry grinding, the workpiece and the grinding medium are used, and in the case of wet grinding, the workpiece, the grinding medium, A plurality of centrifugal drum tanks of water and a mixture to be charged are subjected to planetary motion (self-revolving), and a device for grinding the workpiece is fluidized inside the drum tank by fluidizing the block.

For example, as shown in Patent Document 1, the drum tank is generally made of a metal frame and a polyurethane resin which is fixed as an inner lining material inside the frame.

[Previous Technical Literature] [Patent Literature]

Patent Document 1: Japanese Patent Laid-Open Publication No. 2004-042664

When grinding by a centrifugal drum mill, the block body is placed in a drum tank that has been removed from the centrifugal drum mill, and the operator is manually installed in the centrifugal drum mill. After the grinding is completed, the operator manually removes the drum tank from the centrifugal drum grinder. Previous composition The drum groove is made of a metal frame and is heavy. Therefore, the burden on the operator is large.

Further, as a further problem, there is a method of fixing the inner lining material. The method of fixing the inner lining material in the previously formed drum tank has the following methods: (1) then forming the shape of the drum groove, (2) then lining the plate, and (3) spraying the molten inner lining material. It is post-cured on the inner wall of the drum tank, however, any fixing method has the following problems.

In the case of (1), a forming mold is required. Therefore, when changing the design such as changing the thickness of the lining material, it is necessary to produce a new molding die. Since the forming mold is expensive, design changes cannot be easily made.

In the case of (2), the seam of the inner lining material is produced. Since the workpiece enters the joint depending on the shape of the workpiece, it is impossible to uniformly polish all the workpieces (hereinafter, the grinding state is referred to as "grinding unevenness"). Moreover, since there are corners of an acute angle or an obtuse angle, not only the unevenness of the polishing is caused, but also damage such as chips or cracks is generated in the workpiece due to the polishing.

In the case of (3), it is difficult to uniformly construct the thickness of the inner lining material. In the case where the thickness of the inner lining material is not uniform, uneven grinding occurs. Moreover, the loss of the portion having a small thickness is sharp, resulting in premature replacement of the inner lining material.

Since the previously constructed drum groove has the above problems, it has been sought to overcome the occurrence of new roller grooves of such problems.

In view of the above problems, the present invention is a drum groove for a centrifugal drum mill, which is configured to include a body and a cover, and internally forms a grinding space for loading the block body, characterized in that at least one of the body or the cover is The whole is composed of rubber (hereinafter referred to as "wear-resistant rubber") which imparts abrasion resistance. Here, the abrasion-resistant rubber is a rubber having a measurement value of 350 mm ³ or less in an ARCRON abrasion test prescribed in JIS (Japanese Industrial Standards) K6264-2 (2005). Since the metal frame is not used, it is lighter than the previous drum groove. Therefore, the burden on the operator is reduced. Moreover, since the weight of the drum groove is light, the output of the motor that drives the centrifugal drum mill can be reduced. Since the main body and the cover are larger members, even if the entire body is made of a wear-resistant rubber, it is sufficiently lightweight. However, when the entire body and the cover are made of abrasion-resistant rubber, the weight can be made lighter. . In addition, the entirety of at least one of the body or the cover refers to a portion of the body or the cover that functions as a function of the drum groove body or the cover. That is, it is sufficient if the drum groove of one aspect of the present invention is substantially a body or a cover integrally provided with a rubber which imparts abrasion resistance, for example, a part for fixing the body or the cover for fixing the drum groove to the drum machine. The additional parts such as the parts that make the drum groove have a known wear limit can be made of materials other than the wear-resistant rubber.

Further, the polishing space to be loaded into the block body has a polygonal column shape, and all of the corner portions may be formed as a curved surface. Since there is no sharp or right angle portion, no uneven grinding occurs.

Further, the area of the cross section of the polishing space may be fixed at any position in the height direction. Thereby, the degree of finishing of the workpiece can be made uniform regardless of the shape of the workpiece.

Further, a convex portion is provided on the joint surface between the main body and the cover, and is configured to improve the airtightness of any one of the main body or the cover to the polishing space, and may be set to be outside the convex portion The deformation restricting member is fixed. Since the convex portion is deformed in conformity with the shape of the opposing surface, the sealing property of the inner space of the drum groove can be improved. Further, when the convex portion is deformed more than necessary in the circumferential direction of the drum groove, the sealing property is deteriorated. Therefore, deformation of the outer circumferential direction of the convex portion can be prevented by further setting the above-described deformation restricting member.

Further, a configuration may be adopted in which a marker for knowing the amount of wear of the resin is embedded in the main body or the cover. The inner wall surface that the block body contacts is worn by the barrel grinding. Since the processing capacity is reduced when the wear progresses, the degree of processing cannot be managed. Therefore, it is necessary to replace the drum tank before it affects the machining capacity. Since the replacement time can be known by the mark piece embedded in the drum groove, the management of the degree of processing becomes easy.

The above-mentioned symbol sheet may also be a cloth made of nylon. In addition to the effect of knowing the replacement time of the drum tank, the effect of improving the strength can be further obtained. Moreover, even if the mark piece is exposed on the surface during the barrel polishing, it does not affect the properties of the workpiece.

Further, the method of manufacturing a body or a cover in a drum tank for a centrifugal barrel mill includes the steps of: preparing a forming aid including a member having the same shape as a recess forming the grinding space in the body or the cover; a step of coating the member; a step of obtaining the molded body by curing the covered raw rubber; a step of adjusting the shape of the molded body; and a step of removing the forming aid from the molded body after grinding. Since the raw rubber can be formed by winding the raw rubber around the above member, the molding die as described above is not required. Further, since the shape of the member is the inner wall surface of the drum groove, the corner portion of the inner wall surface of the drum groove can be formed into a curved surface by processing the angular surface of the polygonal columnar member to a specific curvature.

Further, the method of manufacturing the body or the lid in the drum tank for a centrifugal barrel mill may further comprise the steps of: preparing a forming aid comprising a member having the same shape as the recess forming the grinding space in the body or the cover; a step of coating the raw rubber of a specific thickness on the member; fixing the marking piece to at least a side peripheral surface of the coated raw rubber, further coating the raw rubber; and curing the coated raw rubber to obtain a molded body; a step of adjusting a shape other than the molded body; and a step of removing the shaped auxiliary device from the molded body after grinding. The position of the buried mark piece can be easily set.

In one aspect of the invention, a centrifugal drum mill equipped with a plurality of the above-described drum grooves is provided. The centrifugal drum mill includes a turntable that is formed in a disk shape that is rotatable about a revolution axis; a plurality of drum groove shields are provided on the turntable via individual rotation shafts, and are configured to house the inside thereof The drum groove can be rotated independently from the rotation axis; the base portion is configured such that the revolution axis of the turntable is inclined with respect to the horizontal plane, and the rotation axes of the plurality of drum groove shields are arranged in parallel with respect to the revolution axis a driving mechanism that rotates the turntable about the revolution axis; the follower mechanism drives the rotation of the turntable, and rotates the plurality of drum grooves individually around the rotation axis. According to one aspect Since the core roller grinder grinds the workpiece in a state where the drum groove is inclined, it is possible to reduce the damage of the workpiece due to the grinding of the chip or the crack.

Further, the base portion may have a first base having a first inclined surface that is inclined at an angle of 30 degrees or more and 70 degrees or less with respect to a horizontal plane, and a second base having a vertical direction with respect to the first inclined surface. The second inclined surface supports the revolution axis on the second inclined surface such that the revolution axis is disposed perpendicular to the second inclined surface.

According to the present invention, it is possible to provide a drum drum for a centrifugal drum mill which is lighter than the previous drum tank and which suppresses uneven grinding of the workpiece and damage to the workpiece during grinding, and a centrifugal drum on which the drum tank is mounted Grinder.

In addition, the drum groove of the present invention is dry. It can be used in the barrel grinding of any of the wet types.

01‧‧‧Roller slot

10‧‧‧ Ontology

11‧‧‧ recess

12‧‧‧Upper end face (joining face)

13‧‧‧Side lateral side (body)

14‧‧‧Bottom outer side (body)

15‧‧‧ Side inner side (body)

16‧‧‧ Side inner side (body)

17‧‧‧ mark

18‧‧‧ convex

19‧‧‧ deformation limiting components

19a‧‧‧Aids mounting components

20‧‧‧ Cover

21‧‧‧ recess

22‧‧‧Bottom end (joining surface)

23‧‧‧Side lateral side (cover)

24‧‧‧Top outer side (cover)

25‧‧‧ Side inner side (cover)

26‧‧‧Top inner side (cover)

29‧‧‧ Pressing bearing members

30‧‧‧Centrifugal roller grinder

31‧‧‧Roller groove shield

31a‧‧‧floor

31b‧‧‧Retaining components

31c‧‧‧Guide members

31d‧‧‧Support members

31e‧‧‧Bolt components

31f‧‧‧Press the handle

31g‧‧‧ Pressing member

31h‧‧‧Rotary shaft

31i‧‧‧ cam

31j‧‧‧

31k‧‧‧ pole

32‧‧‧ turntable (rotary disc)

32a‧‧‧ public axis

33‧‧‧ drive mechanism

33a‧‧‧Motor

33b‧‧‧ drive wheel

33c‧‧‧Motor wheel

33d‧‧‧ drive belt

34‧‧‧Driver

34a‧‧‧Rotary wheel

34b‧‧‧Rotary wheel

34c‧‧‧Rotating wheel

34d‧‧‧Rotating wheel

34e‧‧‧ driven wheel

34f‧‧‧ driven wheel

34g‧‧‧ driven belt

34h‧‧‧ driven belt

34i‧‧‧Slack prevention wheel

34j‧‧‧Slack prevention wheel

40‧‧‧ Centrifugal roller mill

41‧‧‧2nd abutment

41a‧‧‧2nd inclined surface

42‧‧‧1st abutment

42a‧‧‧1st inclined surface

A-A‧‧‧ line

B-C-D-E‧‧‧ line

BW‧‧‧ bottom

C‧‧‧Rive head mold lock

F-F‧‧‧ line

H‧‧‧Handle attachments

H‧‧‧ hole

P‧‧ sales

S‧‧‧ grinding space

SP‧‧‧ side

SW‧‧‧ side

S1‧‧‧Preparation of forming aids

S2‧‧‧ raw rubber covered with forming aids

S3‧‧‧ Hardening raw rubber to obtain molded body

S4‧‧‧Adjust the shape of the molded body

S5‧‧‧Removal of forming aids

S6‧‧‧ finishing

Fig. 1 is a schematic view for explaining a drum tank of an embodiment. Fig. 1(A) is a partial cross-sectional view of the main body and the cover as seen from the front, and Fig. 1(B) is a plan view of the main body (the arrow A-A in Fig. 1(A)).

Fig. 2 is a flow chart showing a method of manufacturing the drum tank of the embodiment.

Fig. 3 is a schematic view showing the configuration of a centrifugal drum grinder for mounting a drum tank of an embodiment. Fig. 3(A) is a schematic view showing the configuration of a centrifugal barrel mill, and Fig. 3(B) is a schematic view showing a B-C-D-E arrow view in Fig. 3(A).

Fig. 4 is a schematic view for explaining a method of fixing a drum tank of one embodiment to a drum groove shield. 4(A) is a partial cross-sectional view of the drum groove visor viewed from the front direction, and FIG. 4(B) is a schematic view showing the F-F squint view of FIG. 4(A).

Fig. 5 is a schematic view for explaining another method of fixing the drum groove to the drum groove shield.

Fig. 6 is a schematic view for explaining another form of the centrifugal barrel grinder.

The drum groove of one embodiment will be described with reference to Figs. The present invention is not limited to the following embodiments, and a part thereof may be changed as needed. In the following description, the directions in the figure are indicated in the up, down, left, and right directions unless otherwise specified. In addition, in FIGS. 3 to 6, the rivet die lock C and the handle attachment assisting device H of the drum groove 01 are omitted for the sake of convenience.

(Structure of the drum groove)

Fig. 1(A) is a partial cross-sectional view schematically showing a drum tank of an embodiment, and Fig. 1(B) is a plan view showing the main body of the drum tank of the embodiment. A drum tank according to an embodiment is a drum for a centrifugal drum mill, comprising: a body portion including a cylindrical side surface and a bottom surface; and a lid portion; and the polishing portion is partitioned by the body portion and the lid portion. The entire body portion (body 10) or the entire lid portion (cover 20) is made of a rubber which imparts abrasion resistance in the form of one of the resins. Hereinafter, the drum tank 01 shown in Figs. 1(A) and (B) will be described in detail.

As shown in FIG. 1(A), the drum tank 01 is configured to include a cylindrical body 10 having an open upper end and a cylindrical cover 20 having a lower end open. The body 10 has a side portion SW and a bottom portion BW. The side portion SW includes a side outer side surface 13 that faces the outer side space of the body 10; a side inner side surface 15 that is located on the inner side of the side outer side surface 13. The bottom BW is coupled to the lower end of the side SW and includes a bottom outer side 14 that faces the outer side of the body 10 and a bottom inner side 16 that is located on the inner side of the lower outer side 14. Next, a recess 11 which is a space surrounded by the side inner side surface 15 and the bottom inner side surface 16 is formed in the main body 10.

Similarly, the cover 20 has a side portion SP including a side outer side surface 23 facing the outer side space of the cover 20 and a side inner side surface 25 which is located on the inner side of the side outer side surface 23, and a top inner side surface 25, which is connected to The upper end of the side portion SP includes a top outer side 24 that faces the outer side of the cover 20 and a top inner side 26 that is located further inside the top outer side 24. Further, a recess 21 which is a space surrounded by the side inner side surface 25 and the top inner side surface 26 is formed in the cover 20.

When the barrel is polished, the upper end surface 12 of the body 10 and the lower end surface 22 of the cover 20 are adhered to each other. It is a cylindrical container. In the interior of the drum groove 01, the recessed portion 11 of the body 10 and the recess 21 of the cover 20 form a continuous and sealed space, that is, a grinding space S. That is, the side surface in the polishing space S is a surface formed by the side inner side surface 15 and the side inner side surface 25, the bottom surface is the bottom inner side surface 16, and the top surface is the top inner side surface 26.

The polishing space S is a space in which the block body is loaded during barrel polishing. By making the planar shape of the polishing space S (the cross section in FIG. 1(A)) polygonal, the fluidity of the bulk is facilitated, so that the polishing ability is improved. The shape of the polishing space S is not particularly limited as long as the block can be fluidized, but in the present embodiment, it is an octagonal column shape as shown in Fig. 1(B).

All the corners of the polishing space S (the octagonal corner portion of the cross section, the corner formed by the side surface orthogonal to the octagonal surface and the surface orthogonal to the side surface, that is, the bottom surface and the top surface) are all curved surfaces . That is, the inner wall facing the polishing space S has a polygonal cross section, and is a corner portion of each of the apexes of the polygon in the inner wall, a corner portion formed by the side portion SW and the bottom portion BW, and a side portion SW and a cover. The corner formed by 20 has a specific curvature. In addition, the curvatures of the corners may be different from each other. When the corner portion is not a curved surface, the workpiece is allowed to enter the corner portion during the barrel polishing, and thus the polishing unevenness or the chip or the crack is generated in the workpiece during the barrel polishing. On the other hand, unevenness in polishing can be suppressed by setting the corner portion as a curved surface. The radius of curvature of this surface can be selected from R10mm~50mm. When R is too small, unevenness of polishing occurs due to retention of the workpiece, and when R is too large, unevenness of polishing occurs due to the difference in the flow state of the block in each polishing space. Further, a configuration may be adopted in which the cover 20 forms one of the side faces of the polishing space S, and all the corner portions of the polishing space S are curved.

Both the body 10 and the cover 20 are made of a resin. Here, the term "resin" means the concept of a polymer material containing rubber. If the resin satisfies the following requirements, the material is not particularly limited: when the roller is fixed to the roller mill, the outer shape is not deformed to more than necessary, and the inner wall surface is not deformed to more than necessary when the roller is ground, and the inner wall surface is not hard enough to be required. The wall is more resistant to wear. In this embodiment, the De Cerro meter (type) specified in JIS6253-3 (2012) is used. A) The rubber having a hardness of A30 to A90 and imparting abrasion resistance (wearing rubber). When the hardness is too low, when the block body collides with the inner wall of the drum groove 01, the impact force of more than necessary is absorbed, so that the polishing efficiency is deteriorated and the polishing unevenness is caused. When the hardness is too high, the friction of the drum groove 01 is excessively fast due to the above impact force. Although the abrasion resistant rubber is NR (natural rubber), BR (butadiene rubber), SBR (styrene butadiene rubber), NBR (nitrile rubber), etc., the hardness or resistance required for the drum groove 01 can be considered. Appropriate choices such as wear resistance or chemical resistance.

However, even if the wear-resistant rubber is used, the inner wall wear due to the barrel grinding cannot be avoided. Since the shape of the grinding space S changes when the wear is made, the degree of finishing also changes. Therefore, it is necessary to replace the new drum tank 01 before the degree of finishing is affected. Therefore, between the side outer side surface 13 and the side inner side surface 15, and between the bottom outer side surface 14 and the bottom inner side surface 16, a mark sheet 17 for knowing the replacement time of the drum groove, that is, the wear limit is provided. The marker piece 17 is embedded in a position away from the inner wall surface of the body 10 by a certain distance t. The specific distance t is set in accordance with the material of the main body or the shape of the polishing space. The specific distance t of the present embodiment is selected from 3 to 10 mm. Further, in the example shown in FIG. 1(A), although the mark piece 17 is embedded in both the side portion SW and the bottom portion BW, it may be embedded only in either the side portion SW or the bottom portion BW. Further, the marker sheet 17 may be embedded in the side portion SP or the top portion TP of the cover 20.

The mark piece 17 is only required to be buried at a position away from the inner wall surface by a certain distance t, and can be selected from, for example, a metal mesh, a cloth such as nylon or cotton, a film, or the like. The appearance of the marker sheet 17 can be confirmed when the block is replaced. In other words, since it is impossible to confirm during polishing, in the case where the marking piece 17 is present during polishing, the marking piece 17 may be exposed to the inner wall surface to perform barrel polishing. When the intensity of the mark sheet 17 is low or the adhesion to the material of the main body is low, a part of the mark piece 17 is mixed into the block body by barrel polishing, and it becomes contaminated. Further, when the hardness is too high, the workpiece is damaged by the mark sheet 17 during the barrel polishing. In the symbol sheet 17 of the present embodiment, a cloth made of nylon is selected.

In one embodiment, in order to improve the sealing property (sealing property) of the polishing space S, a convex portion 18 that protrudes upward in the upper end surface (the joint surface of the space) 12 of the main body 10 is formed. Convex The 18 series is made of the same material as the body 10 and has a moderate elastic force. According to the convex portion 18, when the lid 20 is pressed against the main body 10, the convex portion 18 is deformed by the shape of the lower end surface 22 of the lid 20, so that the adhesion between the main body 10 and the lid 20 can be improved. In addition, the convex portion 18 may also be formed on the lower end surface 22 of the cover 20. In this case, the convex portion 18 is formed to protrude downward from the lower end surface 22 of the cover 20.

The convex portion 18 is provided along the side inner side surface 15, and the outer edge is formed in a circular shape. Further, a deformation restricting member 19 is attached to the outer periphery of the convex portion 18. When the convex portion 18 is deformed more than necessary in the outer circumferential direction, a step is generated at the boundary between the body 10 and the cover 20. This step is the cause of uneven grinding. By providing the deformation restricting member 19, it is possible to prevent the above-described deformation from occurring in the outer circumferential direction. The deformation restricting member may have a strength that suppresses deformation of the convex portion in the outer circumferential direction as much as possible, and the material thereof may be selected from metals, plastics, ceramics, and the like. In the present embodiment, a metal-made annular plate is used.

Further, in the deformation restricting member 19, a cylindrical auxiliary device mounting member 19a is provided so as to be able to wrap around the side peripheral surface portion of the body 10. The length of the accessory mounting member 19a may be the length of the rivet die lock C or the handle attachment assistant H to be described later.

The outer diameter of the side portion SW in the body 10 is continuously reduced toward the bottom. As will be described later, the position of the drum groove 01 with respect to the drum groove shield during the barrel polishing does not shift, and the drum groove 01 can be easily attached or detached. In the present embodiment, the inclination angle of the side portion SW with respect to the direction perpendicular to the bottom portion BW is selected from the range of 1 to 5 degrees.

In the upper surface of the cover 20, a pressing receiving member 29 is followed. The pressing receiving member 29 prevents deformation of the upper portion of the cover 20 (ie, the top outer side surface 24) when the cover 20 is pressed against the body 10 as will be described later, and uniformly applies the pressing force to the lower end surface 22 of the cover 20 (ie, The joint surface of the body 10).

Further, the pressing receiving member 29 may be attached with a rivet die lock C to be described later.

Further, on the body 10 or the cover 20, a positioning tool for determining the position of the cover 20 with respect to the body 10 is provided. That is, the positioning device is a mechanism for fixing the relative position of the body 10 and the cover 20. Structure. The shape of the polishing space S can be set to an octagonal column shape by the positioning tool. The configuration of the cover 20 is not particularly limited as long as it determines the position of the cover 20 with respect to the body 10. For example, it may be configured that a pin or a convex portion may be erected on the upper end surface 12 of the main body 10 or the lower end surface 22 of the cover 20, and the other may be provided with a hole or a concave portion into which the pin or the convex portion can be fitted. It can also be set to other known configurations. In the present embodiment, as the positioning tool, a plurality of pins P are fixed along the upper end surface 12 of the main body 10, and a hole h for fitting the pin P is provided on the lower end surface 22 of the cover 20.

Further, in the main body 10 and the lid 20, a fixture for fixing the body 10 and the lid 20 when the drum tank 01 is mounted on the centrifugal drum grinder is fixed. When the drum tank 01 is installed in the centrifugal drum mill, the structure is not particularly limited as long as the block body can seal the polishing space without leaking from the drum tank. For example, a member such as a rivet die lock C may be used, and the body 10 and the cover 20 may be coupled by a rubber belt, or may be of other known configurations. In the present embodiment, the rivet die locks C as fixing tools are fixed at four positions at equal intervals.

(Manufacturing method of the drum groove)

Next, a method of manufacturing a drum tank according to an embodiment will be described with reference to Fig. 2 . Fig. 2 is a flow chart showing a method of manufacturing the drum tank of the embodiment. First, a method of manufacturing the body 10 will be described.

Step S1: Steps of preparing a forming aid

In step S1, a forming aid is prepared. The forming auxiliary tool prepared in the step S1 is formed in a polygonal column shape, and has substantially the same shape as the concave portion 11, that is, has a shape substantially the same as the boundary of the polishing space S. In step S1, the shape of the forming aid is first formed by bending and welding of the sheet material or cutting from the columnar member. Next, the corner portion of the forming aid is cut into the same shape as the curvature obtained from the corner portion of the polishing space S. Then, the outer peripheral surface (side peripheral surface and end surface) of the forming aid is ground to have a specific surface roughness, and a member having the same shape as the concave portion 11 is obtained. Since the concave portion 11 is formed by the member, irregularities are formed in the polishing space when the surface of the member has irregularities, which causes uneven polishing. In the present embodiment, the octagonal shape wheel is prepared in an octagonal cross section. A polygonal columnar member of a cylindrical body.

The forming aid can be constituted only by the above-described members. However, in the present embodiment, the rotating shaft is fixed to the center of the end surface (for example, the octagonal shape is the lower surface or the upper surface of the octagonal shape), and is used as a forming aid. The rotating shaft can be fixed to both end faces, and if the forming aid coated by the molded body in the step described later can be stably rotated, it can be fixed only to one end face.

Step S2: Step of coating the raw rubber

In step S2, the raw rubber is coated on the outer peripheral surface of the forming aid. In the step S2, the raw material rubber and the admixture (reinforcing agent, filler, softener, vulcanizing agent, etc.) are kneaded, and the raw rubber is obtained by calendering it. This is coated on the above polygonal member to a specific thickness. This thickness may be the same as the distance from the side inner side 15 of the side portion SW to the mark sheet 17 (i.e., the specific distance t described above).

Next, the mark piece 17 is attached to the outer surface (side surface side, bottom surface side) of the raw rubber. The mark sheet 17 can be adhered only by the adhesive force of the raw rubber, and can also be used to improve the adhesion to the resin.

Thereafter, the raw rubber is further coated in such a manner that the diameter and height of the body are slightly larger.

Step S3: Step of obtaining a shaped body

In step S3, a molded body is obtained by hardening the coated raw rubber. The forming system is obtained by hardening the raw rubber to the hardness of the body 10. In the present embodiment, the raw material coated with the raw rubber is placed in a vulcanization furnace, heated at a specific temperature, and the raw rubber is cured by a chemical reaction (vulcanization).

Step S4: Step of adjusting the outer shape

In step S4, the shape outside the formed body obtained in step S3 is adjusted. In step S4, the shape of the side peripheral surface of the molded body is adjusted to the shape of the side outer side surface 13 of the body 10. This adjustment can use a peripheral grinding device. The outer peripheral grinding device includes a rotary motor, a gripping mechanism coupled to the rotary motor, and a grinding mechanism. After the rotating shaft of the forming aid is gripped by the holding mechanism, the rotating motor is actuated to make the forming aid and the forming body pivot about the rotating shaft. Rotate. In this state, the grinding mechanism is brought into contact with the side peripheral surface of the molded body, and the side peripheral surface is ground by moving the grinding mechanism in parallel with the side peripheral surface of the molded body. At this time, the grinding mechanism is pressed against the molded body so that the outer diameter of the molded body becomes the outer diameter of the body 10, and the side peripheral surface of the molded body is adjusted to the shape of the side outer side surface 13 of the body 10. As will be described later, when the outer peripheral surface of the side outer side surface 13 is to be inclined at a specific angle with respect to the direction perpendicular to the bottom portion BW, the inclination can be formed by this step.

Next, the shapes of the upper end surface and the lower end surface of the molded body are adjusted to the upper end surface 12 and the bottom BW of the body 10, respectively. This adjustment is performed in the same manner as the adjustment of the side peripheral surface, and the grinding mechanism can be pressed against both end faces of the molded body that is rotated about the rotation axis.

As long as the grinding mechanism can grind the molded body, it can be appropriately selected from a rotating grinding stone, a rotating brush, a cutting blade, and the like. In the present embodiment, a rotating grinding stone is used.

Step S5: Steps of removing the molding aid

Next, in step S5, the molded body is removed from the forming aid. After the forming aid is removed from the formed body, the convex portion 18 separately prepared from the same material as the molded body is then obtained from the upper end surface 12 of the molded body.

Step S6: finishing step

Next, in step S6, finishing is performed. In step S6, the deformation restricting member 19 is followed by the upper end surface 12. In the present embodiment, since the auxiliary device attachment member 19a is fixed to the deformation restricting member 19, the deformation restricting member 19 can be applied to the deformation restricting member 19 and the auxiliary device mounting member 19a by applying an adhesive to the main body 10, respectively. Follow the body 10 more firmly.

Next, one of the pin P, the handle fixing aid H, and the rivet die lock C is attached.

Next, a method of manufacturing the lid 20 will be described. The cover 20 can be manufactured by the same steps as the body 10, or can be made using a molding die.

The manufacturing method of the former will be described. First, the cover 20 is obtained by the same steps as the above steps S1 to S5. Although the manufacturing method of the cover 20 is substantially the same as the above steps S1 to S5, Although the detailed description is omitted, in the manufacturing method of the cover 20, the forming aid of the shape corresponding to the recessed part 21 is prepared in step S1.

Next, in the "finishing step" of the step 6, first, after the opening 20 of the cover 20 is opened, the pin P can be fitted, and then the pressing receiving member 29 is attached to the top outer side surface 24, and the rivet die is locked. The other end is attached to the pressing receiving member 29.

Next, the manufacturing method of the latter will be described. A mold is formed on the surface of the flat plate having a convex shape having the same shape as the concave portion 21, and a mold having a concave shape forming an outer shape.

Next, after coating the surface of the lower mold with raw rubber, the upper mold is placed and pressed against the lower mold. Thereby, the raw rubber is filled in the space formed by the lower mold and the upper mold. Further, the raw rubber is hardened by a chemical reaction (vulcanization) by heating the upper mold while pressing it on the lower mold.

After the raw rubber is hardened, the pressing of the upper mold is released, and the hardened raw rubber is taken out to obtain the lid 20. Next, the pressing receiving member 29 is attached to the top outer side surface 24, and the other end of the rivet die lock C is attached to the pressing receiving member 29.

Further, the hole h for fitting the pin P may be opened after the cover 20 is obtained, or may be formed by using a mold having a convex shape for forming the hole h.

In the present embodiment, the lid 20 is produced using a molding die. Since the cover 20 is smaller than the body 10, the increase in manufacturing cost can be reduced even if a molding die is used.

In the method of manufacturing the drum tank of the present embodiment, in the manufacture of either of the main body 10 and the lid 20, it is not necessary to provide the forming aid and the forming mold for removing the raw rubber from the forming aid or the forming mold. Stripping slope. In other words, the area of the cross section of the inner space (polishing space S) of the drum groove 01 can be fixed at any position in the height direction (the direction in which the side inner side surface 15 extends). When the area of the cross section of the grinding space S is reduced or enlarged toward the bottom inner side surface 16, the workpiece tends to stay in the vicinity of the bottom inner side surface 16. As a result, there is a problem that the degree of finishing of each workpiece is different. This phenomenon is tied to When a small workpiece (for example, one side or a diameter of 2 mm or less) is polished, it is remarkably exhibited.

(roller grinding method)

Next, a method of using the drum tank of the present embodiment will be described. In the following description, a case where a ceramic (size: 0.5 × 0.5 × 1.0 mm) composed of a mixture of SiC and Al ₂ O ₃ is subjected to barrel polishing in a dry manner will be described as an example.

First, a specific amount of the block-shaped body, that is, the workpiece and the grinding medium (Xindong Industrial Co., Ltd.: M1-F6T) are respectively placed in the concave portion 11 of the body 10. Next, the cover 20 is placed on the body 10 such that the pin P is fitted to the hole h. Next, the grinding space is sealed by the rivet die lock C.

Next, the drum tank 01 is mounted on the centrifugal drum mill 30. Since the drum tank 01 of the present embodiment has a cylindrical shape, handling at the time of the centrifugal drum mill 30 is difficult. Therefore, in the present embodiment, the handle fixing attachments H for attaching and detaching the handle (not shown) to which the lifting drum groove 01 is attached are detachably fixed at two positions of the auxiliary attachment member 19a at equal intervals.

The centrifugal drum mill 30 uses a so-called vertical type. Specifically, as shown in FIGS. 3(A) and (B), a plurality of drum groove shielding plates 31 (four in the present embodiment) are included, and a turntable 32 (revolving disk) disposed in parallel with respect to the bottom surface is provided. Drive mechanism 33; and follower mechanism 34. The plurality of drum groove shields 31 are provided with a rotation shaft 31h at the center of the bottom surface, and the drum groove 01 is detachably fixed. The turntable 32 has a disk shape, and is provided with holes that can be inserted into the rotation shaft 31h at equal intervals. In the turntable 32, a drum groove shield 31 is rotatably fixed. Further, a hole into which the revolution shaft 32a can be inserted is provided in the center of the plane of the turntable 32, and is rotatably fixed to the revolution shaft 32a fixed in the vertical direction with respect to the ground. The drive mechanism 33 includes a motor 33a, a drive wheel 33b that is attached to the outer circumference of the turntable, a motor wheel 33c that is fixed to the rotation shaft of the motor 33a, and a drive belt 33d that is bridged between the drive wheel 33b and the motor wheel 33c. The drive mechanism 33 rotates the turntable 32 around the revolution axis 32a by the operation of the motor 33a. The follower mechanism 34 includes four rotation wheels 34a to 34d, which are respectively fixed to the rotation shaft 31h; two driven wheels 34e and 34f are fixed to the revolving shaft 32a, and the driven belts 34g and 34h are respectively disposed between the adjacent two rotating wheels and one driven wheel. In FIG. 3(B), the driven belt 34g is placed between the rotation wheels 34a and 34d and the driven wheel 34e, and the driven belt 34h is bridged between the rotation wheels 34b and 34c and the driven wheel 34f. Further, in order to reduce the gap between the driven belts 34g and 34h, the slack preventing wheels 34i and 34j are provided in contact with the outer peripheral surfaces of the driven belts 34g and 34h. When the motor 33a is actuated, the turntable 32 rotates about the revolution shaft 32a. As the turntable 32 rotates the rotation wheels 34a to 34d to rotate in the opposite direction to the turntable, the drum groove shield 31 rotates with its rotation axis 31h as its axis. In other words, the follower mechanism 34 is driven to rotate by the turntable 32, and the plurality of drum grooves 01 are individually rotated about the rotation axis 31h.

As shown in FIG. 4, the drum groove shielding plate 31 includes a tray, a holding roller groove 01, a drum groove fixing portion, and a pair of guiding members 31c for fixing the drum groove fixing portion. The tray includes a bottom plate 31a to which a rotation shaft 31h is fixed at the center of the lower surface, and a holding member 31b which is suspended from the upper surface of the bottom plate 31a. In the present embodiment, four rotating shafts are used as the holding member 31b. The drum groove 01 is housed in a virtual region in which the adjacent rotating shafts are connected to each other. Since each of the rotating shafts is in contact with the side outer side surface 13 of the body 10 of the drum groove, the position of the drum groove 01 during the barrel polishing is not shifted in the left-right direction of FIG. 4(A). In other words, the holding member 31b is disposed so as to surround the drum groove 01 housed in the drum groove shield 31 from the outside, and restricts the movement of the drum groove 01 with respect to the drum groove shield 31.

Further, when the side outer side surface 13 of the drum groove 01 is inclined, the shape of the inner side of the holding member 31b (the side in contact with the side outer side surface 13 of the drum groove 01) may be set to be substantially the same as the inclination angle thereof. In the case where the above-described rotating shaft is used as the holding member 31b, the rotating shaft may be fixed to the bottom plate 31a so as to be inclined at an angle substantially equal to the inclination angle of the side outer side surface 13 of the drum groove 01. The drum groove 01 can be easily attached and detached by the inclination. Further, by the tilting operation of the centrifugal roller grinder 30, the drum groove 01 is rotated about the rotation shaft 31h, or even if the revolution shaft 32a is rotated centrally, the position relative to the drum groove shield 31 is also Will not be offset.

The drum groove fixing portion includes a support member 31d which is formed in a plate shape in which a bolt hole is bored in the center, a bolt member 31e which is screwed into the bolt hole, and a pressing handle 31f which is provided at an upper end of the bolt member 31e. The bolt member 31e is rotated; a pressing member 31g is provided at a lower end of the bolt member 31e for pressing the cover 20 toward the body 10.

The guide member 31c is open at the upper portion with a hole through which the support member 31d is loosely fitted. This hole can guide the drum groove fixing portion to move in the horizontal direction when the drum groove 01 is attached or detached.

After the handle is attached to the handle fixing aid H, the barrel groove 01 is loaded into the drum groove shield 31, and then the support member 31d is horizontally moved so that the pressing member 31g is positioned above the center of the pressing receiving member 29. Next, the pressing member 31f is rotated to lower the pressing member 31g. The bottom surface of the pressing member 31g is a flat surface, and the bottom surface contacts the top outer surface 24 of the cover 20 (in the present embodiment, the pressing receiving member 29), and then the pressing handle 31f is further rotated to press the cover 20 against the body 10. The drum groove 01 is fixed to the drum groove shield 31 while the polishing space is completely sealed.

After the four drum grooves 01 are respectively fixed to the drum groove shield 31, the handle fixed to the drum groove 01 is removed. Thereafter, when the centrifugal roller grinder is actuated, the turntable 32 is rotated by the drive mechanism, whereby the drum groove 01 is rotated (revolved) by the rotation of the turntable 32. Further, the drum groove shield 31 is rotated by the rotation shaft 31h as the axis of rotation, whereby the drum groove 01 is also rotated (rotated) about the rotation axis 31h. The block in the drum tank 01 is fluidized by the self-revolution and grinds the workpiece.

After the centrifugal barrel mill 30 is operated for a specific period of time, its operation is stopped. After the revolving of the drum tank 01 is completely stopped, the drum tank 01 is removed from the centrifugal drum grinder 30 in the reverse order in which the above-described drum tank 01 is installed in the centrifugal drum grinder 30. Next, after the rivet die lock removal cover 20 is released, the block body is taken out from the body 10. Thereafter, the barrel polishing is completed by separating the fine powder generated by the workpiece, the grinding medium, and the barrel.

When the barrel polishing of the new workpiece was continued, it was confirmed that the notch piece 17 was not exposed on the surface of the inner wall surface, and then the block body was placed and polished in the same order.

(change example)

When a small amount of the workpiece is polished by the drum, the height of the drum groove can be lowered, and the plurality of stages can be stacked and fixed to the drum groove shield 31 to perform barrel polishing. In this case, when the lowermost drum groove is deformed more than necessary, the metal outer frame which is prevented from being deformed may be provided on the side of the drum groove.

The method of fixing the drum groove 01 to the drum groove shield 31 is not limited to the above method. For example, as shown in FIG. 5, a cylindrical cam 31i that fixes the core bar 31j to the outer side from the center of both end faces may be used. The knitting core 31j is rotatably fitted to the guiding member 31c, and the cam 31i is rotated about the knitting core 31j by operating the rod 31k fixed to the cam 31i in the direction of the arrow in the figure. A shoulder is formed in the upper surface of the cover 20 (or the pressing receiving member 29), and the cam 31i is pressed against the shoulder by the amount of the cam 31i. Thereby, the drum groove 01 is fixed to the drum groove shield 31.

In the above embodiment, the centrifugal roller grinder 30 is disposed such that the rotation axis 31h and the revolution axis 31a are perpendicular to the ground. In one embodiment, the centrifugal roller mill 30 can also tilt the rotation axis only by a specific angle with respect to the ground. (for example, 30~70°, or 40~50°). Such a form can be realized by, for example, arranging the revolution shaft 32a at a specific angle and rotatably fixing the turntable 32 thereto.

An example of a centrifugal drum mill of this form will be described with reference to Fig. 6 . In the following, the differences from the centrifugal barrel mill 30 will be mainly described. The centrifugal drum mill 40 shown in Fig. 6 includes a disk-shaped turntable 32 that is configured to be rotatable about a revolution axis 32a. A plurality of drum groove shields 31 are provided on the turntable 32 via the rotation shaft 31h. The plurality of drum groove shields 31 are configured such that the drum grooves 01 accommodated therein can be individually rotated about the rotation shaft 31h.

The centrifugal barrel mill 40 has a first base 42 and a second base 41. The first base 42 has an inclined surface 42a (first inclined surface) that is inclined with respect to the horizontal plane. In one embodiment, the inclined surface 42a is disposed to be inclined at an angle of 30 degrees or more and 70 degrees or less with respect to a horizontal plane.

The second base 41 has an inclined surface 41a that is inclined with respect to the horizontal plane (second inclined surface). The second base 41 is supported by the first base 42 such that the inclined surface 41a thereof is perpendicular to the inclined surface 42a of the first base 42. A revolving shaft 32a that is disposed perpendicular to the inclined surface 41a is supported in the inclined surface 41a of the second base 41. In other words, the revolution shaft 32a is disposed in parallel with respect to the inclined surface 42a, and is fixed in a state of being inclined at an angle of not less than 70 degrees to 70 degrees or less with respect to the horizontal plane. Thereby, the revolution shaft 32a is supported by the state in which the turntable 32 is inclined with respect to the horizontal plane. Further, each of the plurality of rotation grooves 31h of the drum groove shield 31 is disposed in a state of being parallel to the revolution axis 32a. The first base 42 and the second base 41 are arranged such that the revolution shaft 32a is inclined with respect to the horizontal plane, and functions as a base portion in which each of the plurality of rotation shafts 31h is disposed in parallel with the revolution shaft 32a.

With this configuration, in the centrifugal drum grinder 40, the turntable 32 and the drum groove shield 31 are rotated by the motor 33a in the same manner as in the above embodiment. Thereby, the drum groove 01 performs planetary motion in an inclined state. As a result, the damage caused by the grinding of the chips or cracks of the workpiece can be reduced. In particular, the effect is remarkable when the hard brittle material as the workpiece is ground.

[Industrial availability]

The drum tank of the present embodiment can be used regardless of the type and shape of the workpiece. For example, when the workpiece is a component such as a laminated ceramic capacitor or an inductor, not only one side of 800 to 1,600 μm but also a very small size of about 100 to 200 μm may be used. Grinded well. Of course, it is also possible to polish a large-sized workpiece (for example, about 10 to 30 mm) well.

01‧‧‧Roller slot

10‧‧‧ Ontology

11‧‧‧ recess

12‧‧‧Upper end face (joining face)

13‧‧‧Side lateral side (body)

14‧‧‧Bottom outer side (body)

15‧‧‧ Side inner side (body)

16‧‧‧ Side inner side (body)

17‧‧‧ mark

18‧‧‧ convex

19‧‧‧ deformation limiting components

19a‧‧‧Aids mounting components

20‧‧‧ Cover

21‧‧‧ recess

22‧‧‧Bottom end (joining surface)

23‧‧‧Side lateral side (cover)

24‧‧‧Top outer side (cover)

25‧‧‧ Side inner side (cover)

26‧‧‧Top inner side (cover)

29‧‧‧ Pressing bearing members

A-A‧‧‧ line

BW‧‧‧ bottom

C‧‧‧Rive head mold lock

H‧‧‧Handle attachments

H‧‧‧ hole

P‧‧ sales

S‧‧‧ grinding space

SP‧‧‧ side

SW‧‧‧ side

TP‧‧‧ top

Claims (9)

A drum tank comprising a body and a cover, and a drum groove for a centrifugal drum grinder for loading a grinding space of the block body is formed therein, and at least one of the body or the cover includes a wear resistance a performance rubber; the drum groove includes: a convex portion provided in a convex portion of the main body and the cover, wherein the convex portion fits between the main body and the cover when the main body and the cover are crimped The other shape is deformed to improve the sealing property of the polishing space; and the deformation restricting member is fixed to the outer side of the convex portion to prevent the convex portion from being deformed in the outer circumferential direction. The drum groove of claim 1, wherein the grinding space is in the shape of a polygonal column, and all of the corner portions are curved surfaces. The drum groove of claim 1 or 2, wherein the area of the cross section of the grinding space is fixed at any position in the height direction. The drum tank of claim 1 or 2, wherein the marking piece for knowing the amount of friction of the rubber is embedded in the body or the cover. The drum tank of claim 4, wherein the marking piece comprises a nylon cloth. A method of manufacturing the body or cover of the drum tank of any one of claims 1 to 5, and comprising: preparing a member including the same shape as the recess forming the grinding space in the body or the cover a step of forming an auxiliary device; a step of coating the raw rubber on the member; a step of curing the coated raw rubber to obtain a molded body; a step of adjusting a shape of the molded body; and removing the molded body after the adjustment The steps of the above forming aid. A manufacturing method for manufacturing the body or cover of the drum tank of claim 4 or 5, and comprising: forming a forming aid comprising a member having the same shape as the recess forming the grinding space in the body or the cover a step of coating a raw rubber of a specific thickness on the member; fixing the marking piece to at least a side peripheral surface of the coated raw rubber, further coating the raw rubber; and hardening the covered raw rubber a step of forming a molded body; a step of adjusting a shape of the molded body; and a step of removing the formed auxiliary member from the adjusted molded body. A centrifugal drum grinder, which is provided with a plurality of drum tanks according to any one of claims 1 to 5, comprising: a turntable, which is formed in a disc shape which is rotatable about a revolution axis; a plurality of rollers a groove visor, wherein the plurality of drum groove shims are disposed on the turret via the individual rotation axes, and the drum grooves configured to be housed therein are individually rotatable about the rotation axis; the abutment portion The rotation axis of the turntable is disposed obliquely with respect to a horizontal plane, and each of the plurality of rotation grooves of the plurality of drum groove shielding plates is disposed in parallel with respect to the revolution axis; and the driving mechanism is configured to rotate the rotation table with the rotation axis The centering is rotated; the driven mechanism is driven by the rotation of the turntable, and the plurality of the drum grooves are individually rotated about the rotation axis. The centrifugal barrel mill according to claim 8, wherein the base portion includes a first base including a first inclined surface inclined at an angle of 30 degrees or more and 70 degrees or less with respect to a horizontal plane; and the second base includes a relative a second inclined surface perpendicular to the first inclined surface, and The revolution axis is supported on the second inclined surface such that the revolution axis is disposed perpendicular to the second inclined surface.