KR20130061026A - Barrel-polishing unit and method for barrel polishing using the same - Google Patents

Abstract

It is compatible with the main body 11 and the lid 12 of the barrel tank 10, the fixing of the lid 12 to the body portion 11 of the barrel tank 10 and the barrel to the barrel tank case 20 Disclosed is a polishing unit capable of reliably fixing the jaw 10. The barrel tank 10 has a lid fixing member 14 that fixes the lid 12 to the main body portion 11. The barrel tank case 20 includes a tray 21 for mounting and holding the barrel tank 10, a barrel tank fixing member 22 for fixing the barrel tank 10 to the tray 21, and a barrel. A pair of guide portions 23 for guiding the jaw fixing member 22 to be movable in the horizontal direction are included. The barrel tank fixing member 22 is disposed across the position opposite to the tray 21 so as to be able to press the barrel tank 10 vertically downward and pressurizes the barrel tank 10 to press the barrel member 10 and the barrel. The convex member 22c and the protruding member 22d are included as a positioning member which restricts the movement of the barrel tank fixing member 22 with respect to the guide part 23 when mounting the tank fixing member 22. As shown in FIG.

Description

Polishing unit and polishing method by polishing unit {BARREL-POLISHING UNIT AND METHOD FOR BARREL POLISHING USING THE SAME}

This application claims the benefit of the priority of Japanese Patent Application No. 2010-216294 (application date September 28, 2010), the name "polishing unit" of the invention, and the content of the said application is referred to in this specification by reference. Included.

The present invention relates to a polishing unit for use in a centrifugal barrel polishing apparatus and a polishing method using a centrifugal barrel polishing apparatus equipped with the polishing unit.

Conventionally, a workpiece and a polishing medium are thrown into a barrel tank for burr removal, rounding, gloss finishing, and the like of a to-be-processed object, and the barrel tank is self-rotating to flow the workpiece to the workpiece. Centrifugal barrel polishing apparatuses for polishing metal are widely used.

The conventional polishing unit used for such a centrifugal barrel polishing apparatus is disclosed by patent document 1, for example.

An example of the conventional grinding | polishing unit is shown in FIG. The conventional polishing unit 100 includes a barrel tank 110 composed of a box-shaped body 111 and a lid 112, and a barrel tank case 120 rotatably attached to a turret (revolving disk) (not shown). Equipped. In order to fix the barrel tank 110 to the barrel tank case 120, an operator manually operates the lever 122 of the fixing member 121 installed in the barrel tank case 120, thereby rotating the eccentric rod 123, The cam 124 is brought into contact with the shoulder 113 formed on the upper surface of the cover 112, and the cover 112 is strongly pressed against the main body 111 to fix it.

Japanese Laid-Open Patent Publication No. Hei 11-58214 (Shinto-Brator Co., Ltd.)

In the conventional polishing unit 100 as described above, since the barrel tank 110 is not provided with a means for fixing the lid 112 to the main body 111, it is possible to generate a sufficient pressing force with an eccentric amount of the cam 124. To this end, high precision is required for clearance between the cam 124 and the shoulder 113. Therefore, if the main body 111 and the cover 112 do not match with each other, the clearance may deviate from a predetermined range. Therefore, the main body 111 and the cover 112 do not have compatibility with other covers and the main body, and the barrel There is a problem in that the detachable work of the tank 110 cannot be efficiently performed. In addition, since the magnitude of the pressing force and the direction in which the pressing force acts are determined by the amount of eccentricity of the cam 124 and the clearance between the cam 124 and the shoulder 113, it is necessary to control the pressing force in a constant direction at a constant value. There is also the problem of difficulty.

In addition, when the rubber lining on the inner surface of the barrel tank 110 is replaced, the rubber forming the lining may be heated to be removed. In this case, if heat distortion occurs in the main body 111 or the cover 112 or both, Since the clearance between the cam 124 and the shoulder 113 is changed, the clearance needs to be corrected and at least one of the main body 111 and the cover 112 must be replaced in some cases.

In addition, as described above, the barrel tank 110 is used for maintenance (for example, replacement of the barrel tank due to wear of the rubber lining), and for entering and exiting the workpiece and the polishing medium with respect to the barrel tank 110. Since it needs to be attached and detached, weight reduction is calculated | required.

Accordingly, an object of the present invention is to provide the barrel body and the lid with compatibility with other lids and bodies, and to secure the lid to the barrel body and the barrel tank with respect to the barrel tank case. The present invention provides a polishing unit having excellent water retention property, and a polishing method using the polishing unit.

In order to achieve the above object, in one embodiment of the present invention, a polishing unit for use in a centrifugal barrel polishing apparatus is provided, which includes a main body portion for charging a polishing member and a medium, and the main body. A barrel tank having a lid for sealing a part,

And a barrel tank case having a tray for holding the barrel tank and a barrel tank fixing member for fixing the barrel tank to the tray, the barrel tank case being attached to an idle disk of the centrifugal barrel polishing apparatus. The barrel tank fixing member has a pressing member configured to be able to pressurize the lid vertically in correspondence with the outer shape of the lid.

According to the present embodiment, the lid can be pressed vertically downward by the pressing member, and the lid can be fixed to the main body by an appropriate pressing force. Therefore, the barrel tank is placed on the barrel tank case without depending on the clearance between the barrel tank fixing member and the lid. It can be fixed securely.

In addition, since the pressing member corresponds to the outer shape of the lid, the backlash of the pressing member and the lid can be prevented from occurring and the lid can be securely fixed to the main body.

Since the lid can be fixed to the main body in the same pressurized state, it is not necessary to fix the combination of the main body and the lid, so that the polishing unit compatible with the barrel tank main body and the lid can be provided.

In this case, the barrel tank fixing member is inserted through a pair of guide parts for guiding the barrel tank fixing member, and is configured to be movable in a horizontal direction when the barrel tank is detached and attached, and the barrel tank fixing is performed. When mounting a member in the fixed position of the said barrel tank, you may include the positioning member which limits the movement of the said barrel tank fixing member with respect to the said guide part.

According to such a configuration, the barrel tank fixing member is inserted through a pair of guide portions for guiding the barrel tank fixing member, and is configured to be movable in the horizontal direction when the barrel tank is detachably attached. Can prevent the barrel tank from being attached or detached, and the barrel tank can be easily attached and detached.

And when mounting a barrel tank fixing member in a barrel tank fixing position, since the movement of the barrel tank fixing member can be restrict | limited with respect to a guide part by a positioning member, it is easy to arrange | position a barrel tank in a fixed position, and to not move. You can do that.

The positioning member includes a convex member that restricts movement in the mounting direction of the barrel tank fixing member when the barrel tank fixing member is mounted at the barrel tank fixing position, and protrudes outward from the inside of the barrel tank fixing member. A protruding member biased in a direction to be biased, the protruding member being configured to be housed inside the barrel fixing member, protruding when the barrel fixing member is mounted at a fixed position of the barrel, and the barrel It may also include a protruding member that restricts movement of the jaw fixing member in the release direction.

In this case, when mounting the barrel fixing member, the movement in the mounting direction of the barrel fixing member can be restricted by the convex member, and the movement in the release direction can be restricted by the protruding member. Thereby, a barrel tank can be easily arrange | positioned at a fixed position, and can prevent it from moving.

Since the protruding member is biased in the direction of protruding outward from the inside of the positioning member, it is automatically protruded only by attaching the barrel fixing member to the fixing position of the barrel to limit the movement in the release direction.

The polishing unit of the present invention includes an index plunger capable of positioning to a predetermined position, a lid pressing member for pressing the lid against the main body through the index plunger by operating the index plunger, and It is preferable to further provide a lid fixing member for fixing the lid to the main body.

In this case, since the barrel tank is provided with a lid fixing member for fixing the lid to the body portion by operating the index plunger, it is possible to fix it simply and reliably, so that the conformity between the body portion and the lid need not be considered. The parts and the cover can be given compatibility with other covers and the main body.

In any of the polishing units described above, it is preferable to form the welded portion of the barrel main body by a spot welding method.

Conventionally, the barrel tank main body is formed by welding the entire circumference of a metal plate forming a side surface to a metal plate bent in a columnar shape by an arc welding method or the like. A thick sheet having a thickness of 3 mm or more is used. On the other hand, when the welded portion of the barrel tank body portion is formed by the spot welding method as described above, the metal plate is less likely to be melted, and thus the barrel tank body portion can be manufactured using a thin metal plate of about 1 mm. As a result, the barrel tank can be reduced in weight, and the burden on the operator can be reduced, and the number of working steps in the barrel tank work can be reduced and the cost of the member can be reduced. In addition, by reducing the weight of the barrel tank, the load on the driving source for performing the rotation and idle movement of the barrel tank can be reduced, and the deterioration of the barrel polishing apparatus can be suppressed while saving the energy of the barrel polishing apparatus.

It is preferable that the said medium grind | polishing by the centrifugal barrel polishing apparatus provided with any one of the above-mentioned grinding | polishing units is formed by disperse | distributing an abrasive grain to resin used as a base body, and the said abrasive grain is It is preferable to contain 30-70 mass% with respect to the said medium. Moreover, it is preferable that the weight of the said medium is 0.01-50g or specific gravity is 1.7-2.3.

Further, the medium is preferably formed by a linear motion portion having a circular cross section and having a continuous and identical cross-sectional area, and a shaft diameter portion continuously reduced in diameter than the cross-sectional area. In addition, it is preferable that the aforesaid medium is rounded at an acute angle.

Moreover, it is preferable that ratio of the diameter of the said circular cross section and the length of the cross section orthogonal to the said circular cross section is 1: 0.5-1: 1.5.

When polishing is carried out using a medium made of a resin, it contributes to "lightening" which is one of the objects of the present invention. However, when the content of the resin is small, sufficient polishing force cannot be obtained. In order to contribute to weight reduction and to obtain sufficient polishing force, it is preferable to make the content rate of the abrasive grains contained in the said medium into 30-70 mass%. Moreover, it is preferable that the weight of the said medium is 0.01-50g or specific gravity is 1.7-2.3.

The centrifugal barrel polishing apparatus provided with any one of the polishing units described above has a higher grinding force than the barrel polishing apparatus (e.g., rotary) of other types because the barrel tank autonomously rotates and polishes at the time of polishing. The amount of hand loss is large. By making the shape of the medium a combination of the linear motion portion and the shaft diameter portion as described above, the collision energy is dispersed when colliding with the workpiece and the barrel tank causing the wear of the medium, and only a specific portion is intensively worn out. It is possible to prevent so-called uneven wear, cracks and defects. Moreover, by giving a rounding process to an acute angle part, it can prevent that it becomes a starting point of a crack and a defect. In the medium having a shape in which the linear motion portion and the shaft diameter portion are combined, in order to have sufficient polishing force and to prevent the above-mentioned uneven wear, cracks and defects, the optimum shape is the length of the circular cross section and the cross section perpendicular to the cross section. It is preferable to set the ratio of 1: 0.5 to 1: 1.5.

(1) According to the polishing unit 1 of the present invention, the lid 12 is pressed vertically downward by the pressing member 22a, and the lid 12 can be fixed to the main body portion 11 by an appropriate pressing force. Therefore, the barrel tank 10 can be reliably fixed to the barrel tank case 20 regardless of the clearance of the barrel tank fixing member 22 and the lid 12.

Moreover, since the contact part 22e of the press member 22a corresponds to the external shape of the cover 12, the back part 12 is prevented from occurring in the backlash of the press member 22a and the cover 12, and the cover part 12 is attached to the main body part. It can be fixed to (11) reliably.

Since the lid 12 can be fixed to the main body portion 11 in the same pressurized state, it is not necessary to limit the combination of the main body portion 11 and the lid 12 to one-to-one, and the main body portion 11 and the lid (12) can be used as the grinding | polishing unit 1 which is compatible with another cover and a main body part.

(2) Since the barrel tank fixing member 22 is configured to be movable in the horizontal direction when the barrel tank 10 is attached or detached, the barrel tank fixing member 22 does not prevent the barrel tank 10 from being attached or detached. It can prevent, and the attachment / detachment of the barrel tank 10 becomes easy.

And when mounting the barrel tank fixing member 22 in the fixed position of the barrel tank 10, the barrel tank fixing member (based on the guide part 23 by the convex member 22c and the protrusion member 22d) ( Since the movement of 22) can be restricted, the barrel tank 10 can be easily arranged in a fixed position so as not to move.

(3) The barrel tank 10 is provided with the lid fixing member 14 which fixes the lid 12 to the main-body part 11 by operating the index plunger 14a, and since a simple and reliable fixation is possible, It is not necessary to consider the compatibility between the main body 11 and the cover 12, and the main body 11 and the cover 12 can be made compatible with other covers and the main body.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, schematically illustrate preferred embodiments of the invention and, together with the foregoing general description and the detailed description of the preferred embodiments below, help to explain the subject matter of the invention. Becomes
BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the structure of the barrel tank of the polishing unit which concerns on this invention, FIG. 1 (A) is a perspective view of a barrel tank, and FIG. 1 (B) is a side perspective view.
FIG. 2 is an explanatory view showing the structure of a polishing unit according to the present invention, in which FIG. 2A is a perspective view of the polishing unit, and FIG. 2B is an enlarged cross-sectional view along the line AA of FIG. to be.
3A to 3D are explanatory views showing the structure of the lid fixing member in the barrel tank of the polishing unit according to the present invention and the method of fixing the lid to the main body portion by the lid fixing member.
4 is a perspective view showing a conventional polishing unit.
5 is an explanatory view showing the shape of a medium according to the present invention, in which FIG. 5A is a front view, and FIG. 5B is a view from the arrow AA direction in FIG. 5A (bottom view). )to be.

The grinding | polishing unit used for the centrifugal barrel grinding apparatus which concerns on this invention is demonstrated. In addition, this invention is not limited to the following embodiment.

As shown in FIG. 1, the barrel tank 10 is formed in a tubular shape having a polygonal or circular longitudinal section, and has a main body portion 11 having an opening 11a for charging a workpiece and a medium thereon; The cover 12 which seals the opening 11a is provided. In this embodiment, the barrel tank 10 is formed in an octagonal longitudinal cross-section as an example.

On the inner surface of the main body portion 11 and the lower surface of the lid 12, linings 13 made of a wear resistant rubber member for preventing abrasion of each surface are formed, as in the conventional polishing unit.

The lid fixing member 14 for fixing the lid 12 to the body portion 11 corresponds to a fixing position (hole portion 11b) outside the opening portion 11a of the body portion 11. It is installed in 4 parts of).

When the lid 12 to be attached to the main body portion 11 is matched to a predetermined position with respect to the main body portion 11, the lid fixing member 14 protrudes by pins, balls, or an equivalent thereof (not shown). An index plunger 14a for positioning the lid 12 and a lid pressing member capable of pressing the lid 12 against the main body portion 11 through the index plunger 14a by operating the index plunger 14a. Has 14b. 1 shows a state in which the lid 12 is fixed to the main body portion 11 by the lid fixing member 14.

3 shows the structure of the lid fixing member 14 and the fixing structure to the main body 11 of the lid 12 by the lid fixing member 14 and the fixing method. Here, upper half of FIG. 3A and FIGS. 3B to 3D are perspective views of the fixing structure from the side, and the lower half of FIG. 3A is a plan view of the main body 11 viewed from above. to be.

As shown in FIG. 3 (A), the lid pressing member 14b operates the index plunger 14a in a cylindrical portion that can be inserted into the hole portion 11b of the main body portion 11 through the lid 12. It is comprised so that rotation is possible. The inclined groove 14c is formed in the cylinder part inserted into the hole part 11b, and the fixing pin 11c which guides the inclined groove 14c in the up-down direction is provided in the inside of the hole part 11b.

As shown in FIG. 3B, the lid pressing member 14b is inserted into the hole 11b of the main body 11, and as shown in FIG. 3C, the index plunger 14a. 1), the lid pressing member 14b is rotated, the inclined groove 14c is guided by the fixing pin 11c, and the index plunger 14a is moved downward.

Then, when the index plunger 14a reaches the predetermined position, the pin protrudes downward, and the lid pressing member 14b is positioned at the predetermined rotational position. As shown in Fig. 3D, the lid 12 ), The lid 12 may be fixed to the main body portion 11 by pressing the upper surface of the. Here, since the index plunger 14a is positioned at a predetermined position (one end L position of the arrow in Fig. 1), the lid 12 is opened by the lid pressing member 14b via the index plunger 14a to the main body portion 11. ), The displacement to pressurize) can be made constant (that is, the pressing force is constant).

When the index plunger 14a is rotated in the O direction in FIG. 1, since the pressing on the lid 12 is released, the lid 12 can be removed from the main body portion 11.

Thus, since the barrel tank 10 is equipped with the lid fixing member 14 which fixes the lid | cover 12 to the main-body part 11, since a simple and reliable fixation is possible, the main-body part 11 and the lid | It is not necessary to consider the conformity of 12), and the main body portion 11 and the lid 12 can be made compatible with other lids and the main body portion.

Here, the position and number where the lid fixing member 14 is provided can be appropriately set depending on the size of the barrel tank 10 and the like.

As shown in FIG. 2, the barrel tank case 20 includes a tray 21 for mounting and holding the barrel tank 10, and a barrel tank fixing member for fixing the barrel tank 10 to the tray 21. 22) The pair of guide parts 23 which guide the barrel tank fixing member 22 so that the barrel tank fixing member 22 can be moved to a horizontal direction (rotation axis direction in this embodiment) is provided. The barrel tank case 20 is rotatably attached to the turret (revolving disk) of the centrifugal barrel apparatus which is not shown through the rotating shaft 24. As shown in FIG.

The guide part 23 is provided in the both side surfaces of the rotation axis direction, and when the barrel tank fixing member 22 is inserted, the guide part 23 of the inner peripheral surface and the barrel tank fixing member 22 of the guide part 23 is inserted. It is formed in ring shape so that the clearance gap of the grade which does not prevent the movement of the barrel tank fixing member 22 between the outer peripheral surfaces is formed.

The barrel tank fixing member 22 is disposed across the position opposite to the tray 21 so as to be able to press the barrel tank 10 vertically downward, and pressurizes the member 22a for pressing the barrel tank 10, It is provided with the convex member 22c and the protrusion member 22d which are positioning members which restrict the movement of the barrel tank fixing member 22 with respect to the guide part 23 when mounting the barrel tank fixing member 22, have.

The pressing member 22a adjusts an up-down position by the fastening bolt 22b, for example, and is comprised so that the cover 12 can be pressed vertically downward. The contact part 22e which presses the cover 12 corresponds to the external shape of the upper surface of the cover 12.

The convex member 22c is formed in the convex shape which cannot pass through the guide part 23 on the barrel tank fixing member 22 upper surface, and the barrel tank fixing member 22 is fixed to the barrel tank 10. It is arrange | positioned at the position which restrict | limits the movement in a mounting direction (arrow M direction of FIG. 2 (A)) at the time of attaching to.

The protrusion member 22d is formed in plate shape in this embodiment, is comprised so that it can be accommodated in the barrel tank fixing member 22, and the direction which protrudes outward from the inside of the barrel tank fixing member 22 ( Biased by a spring or the like in the arrow X direction in FIG.

The protruding member 22d protrudes when the barrel tank fixing member 22 is mounted, and is formed to restrict the movement of the barrel tank fixing member 22 in the release direction (FIG. 2A is indicated by the arrow N direction). have.

When releasing the barrel tank fixing member 22, the protrusion member 22d is housed inside the barrel tank fixing member 22 against the bias, whereby the restriction on the movement can be easily released and moved.

In addition, the guide part 23 on the mounting direction side may be formed in a cup shape opened in the release direction instead of the above-described ring shape. Also in this case, the movement in the mounting direction of the barrel tank fixing member 22 can be restricted, and the same effect as the convex member 22c is exhibited.

Below, the usage example of the polishing unit 1 of this embodiment is demonstrated.

First, the workpiece and the medium are introduced into the body portion 11 of the barrel tank 10, the lid 12 is placed in the opening 11a of the body portion 11, and the cover is operated by operating the index plunger 14a. The lid 12 is fixed to the main body 11 by the fixing member 14.

Next, the barrel tank fixing member 22 is released along the guide portion 23 in a state in which the projecting member 22d is pressed and housed inside the barrel tank fixing member 22 (in Fig. 2A). Arrow N direction).

Subsequently, the barrel tank 10 is mounted on the tray 21, and the mounting direction in which the barrel tank fixing member 22 is mounted at the fixed position of the barrel tank 10 (arrow M direction in Fig. 2A). ) Moves along the guide portion 23. Here, since the inclined part 22f which becomes narrow toward the mounting direction M is formed in the protrusion member 22d, when the barrel tank fixing member 22 is moved to a mounting direction, it will be provided to the guide part 23. As shown in FIG. By this, the protruding member 22d is press-fitted in the arrow Y direction of Fig. 2A. And when the protrusion member 22d passes through the guide part 23, it protrudes again and the barrel tank fixing member 22 is positioned in a predetermined position.

Then, the pressing member 22a is lowered by the fastening bolt 22b, the lid 12 is pressed vertically downward and pressed against the main body 11 to seal the barrel tank 10 with the barrel tank case ( 20).

Thus, since the lid 12 can be pressed vertically downward by the press member 22a, and the cover 12 can be fixed to the main-body part 11 by appropriate pressing force, the barrel tank fixing member 22 and the cover The barrel tank 10 can be reliably fixed to the barrel tank case 20 regardless of the clearance of (12).

In addition, since the contact portion 22e of the pressing member 22a corresponds to the outer shape of the lid 12, the backlash of the pressing member 22a and the lid 12 is prevented from occurring so that the lid 12 is the main body. It can be fixed to the part 11 reliably.

Since the lid 12 can be fixed to the main body portion 11 in the same pressurized state, there is no need to fix the combination of the main body portion 11 and the lid 12, so that the main body portion 11 and the lid 12 are It can be set as the polishing unit 1 which is compatible with another cover and a main-body part.

The main body part 11 of the barrel tank 10 used by this embodiment is manufactured by welding the metal plate which forms a side surface to the metal plate bent in columnar shape by the spot welding method. Conventionally, although the barrel tank main body part was formed by welding the whole periphery by the arc welding method etc., since the heat input amount is large and there is a possibility of melt | dissolution, as for the metal plate, the thickness of 3 mm or more is employ | adopted as the metal plate.

On the other hand, by forming the welded portion of the body portion 11 by the spot welding method as in the present embodiment, the metal plate is less likely to be molten, so that the body portion 11 can be manufactured using a thin metal plate of about 1 mm. . As a result, the barrel tank 10 can be reduced in weight, and the burden on the operator can be reduced, and the number of work steps related to production can be reduced and the cost of the member can be reduced. In addition, by reducing the weight, the load on the driving source (for example, the driving motor) for rotating and rotating the barrel tank 10 is reduced, and energy saving of the barrel polishing apparatus 1 is achieved. Deterioration of the barrel polishing apparatus 1 can be suppressed.

In the conventional barrel tank, when replacing the lining, a new lining may be formed after heating and removing the rubber | gum which forms a lining. However, in such an exchange method, since there is no big difference between the cost of newly forming the lining 13 and the manufacturing cost of the polishing barrel tank 10, the new barrel tank 10 is used without replacing the lining 13. You may also

As described above, since the operator manually mounts the barrel tank 10 into which the medium and the workpiece are put in the centrifugal barrel polishing apparatus, it is preferable to be lightweight. Therefore, in this embodiment, the medium which used resin as a base and disperse | distributed the abrasive grain to the said resin was used. Although it is lighter than a medium formed by abrasive grains, when the content of abrasive grains is low, sufficient abrasive force is not obtained. Therefore, the abrasive grain content is preferably 30 to 70% by mass, preferably 40 to 60% by mass with respect to the medium. Do. The weight of the medium is preferably 0.01 to 50 g, preferably 0.02 to 40 g, or the specific gravity of the medium is 1.6 to 2.4, preferably 1.8 to 2.2. If the weight or specific gravity is smaller than the above-mentioned range, the flow of the barrel in the barrel tank 10 may be insufficient to obtain sufficient polishing force. If the weight or specific gravity is larger than the above-mentioned range, the workpiece and the media may collide during polishing. , Marks on the surface of the workpiece. In addition, the resin may be a thermoplastic resin (for example, nylon resin, polystyrene resin, polypropylene resin, polyamide resin, AS resin, etc.) or thermosetting resin (for example, phenol resin, unsaturated polyester resin, polyurethane resin). , Epoxy resin, urea resin, etc.) can be preferably used. As the abrasive, a well-known material (for example, alumina, silica, silicon carbide, iron oxide, boron oxide, zircon, chromium oxide, diamond, diamond steel, or powder thereof, or a molded product thereof) can be preferably used. have. The grain size of the abrasive can be appropriately selected depending on the kind of the abrasive, the size of the medium, the properties of the workpiece, and the purpose of polishing.

In addition, the shape of the medium may be spherical, columnar (cylindrical, polygonal column), conical shape, etc., as shown in Figure 5, having a circular cross-section, continuous and having the same cross-sectional area, and It was set as the shape formed by the shaft diameter part which reduces diameter continuously rather than the said cross-sectional area. It has a stronger polishing force than a spherical medium, and as the polishing progresses, such as a cone shape or a column shape, the medium does not wear out unevenly and is worn while maintaining the same shape, so that high polishing force can be maintained for a long time. If the angular surface of the linear motion portion, the intersection of the linear motion portion and the shaft diameter portion, or the apex of the shaft diameter portion (the portion having the smallest diameter) is an acute angle, the acute angle portion is the starting point and chipping. This occurred and caused a crack and a defect of a medium, and the damage or unevenness | corrugation (corrosion) were formed in a workpiece | work, and the medium which gave rounding process to the said acute part was used. The rounding may be performed after forming a medium having an acute angle, or may be performed so as not to have an acute angle at the time of formation of the medium.

The size of the medium is appropriately selected depending on the properties of the workpiece, the purpose of polishing, the size of the barrel tank, and the like, and the diameter of the circular cross section is preferably selected from 1 to 50 mm, preferably 2 to 40 mm. In the medium having the above-described shape, the ratio (D: L) of the diameter (D) of the circular cross section and the length L of the cross section orthogonal to the circular cross section is preferably 1: 0.5 to 1: 1.5. Do. If L is smaller than D, sufficient polishing force is not obtained. If L is large, uneven wear of the medium occurs during polishing.

The centrifugal barrel polishing apparatus using the polishing unit of the present invention may be either a dry centrifugal barrel polishing apparatus or a wet centrifugal barrel polishing apparatus.

Some embodiments of the invention have been described. However, it should be understood that various modifications may be made without departing from the spirit and object of the present invention.

1: polishing unit
10: barrel tank
11: main body
11a: opening
11b: hole
11c: retaining pin
12: cover
14: cover fixing member
14a: index plunger
14b: cover pressing member
14c: Inclined Groove
20 barrel barrel case
21: tray
22: barrel tank fixing member
22a: pressing member
22b: tightening bolt
22c: convex member
22d: protruding member
22e: contact
23: guide part
24:

Claims (12)

As a polishing unit used for a centrifugal barrel polishing apparatus,
A barrel tank having a main body portion into which a to-be-polished member and a medium are put, a lid for sealing the main body portion,
A barrel tank case having a tray for holding the barrel tank and a barrel tank fixing member for fixing the barrel tank to the tray, the barrel tank case being attached to an idle disk of the centrifugal barrel polishing apparatus,
The barrel tank fixing member has a pressing member configured to press the lid vertically downward in correspondence with the outer shape of the lid. The method of claim 1,
The barrel tank fixing member,
It is inserted into a pair of guide parts for guiding the barrel tank fixing member, and is configured to be movable in the horizontal direction when the barrel tank is detachable.
And a positioning member for restricting the movement of the barrel tank fixing member with respect to the guide portion when the barrel tank fixing member is mounted at the barrel tank fixing position. 3. The method of claim 2,
Wherein the positioning member comprises:
A convex member for restricting movement in the mounting direction of the barrel tank fixing member when the barrel tank fixing member is mounted at the fixing position of the barrel tank;
A protruding member biased in a direction projecting outward from the inside of the barrel tank fixing member, the barrel tank fixing member being configured to be housed and configured to accommodate the barrel tank fixing member. And a protruding member that protrudes when mounted in a fixed position to limit movement in the release direction of the barrel fixing member. The method according to any one of claims 1 to 3,
An index plunger capable of positioning to a predetermined position, a lid pressing member for pressing the lid against the main body through the index plunger by operating the index plunger, and the lid to the main body. And a lid fixing member for fixing the polishing unit. The method according to any one of claims 1 to 4,
And a welded portion of the barrel tank main body formed by a spot welding method. As a grinding | polishing method by the centrifugal barrel grinding apparatus provided with the grinding | polishing unit in any one of Claims 1-5,
The said medium is a grinding | polishing method characterized by the abrasive grain being disperse | distributed and formed in resin used as a base body. The method according to claim 6,
The abrasive grains contain 30 to 70% by mass of the medium. The method according to claim 6 or 7,
Polishing method characterized in that the weight of the medium is 0.01 ~ 50g. The method according to claim 6 or 7,
The specific gravity of the said medium is 1.6-2.4, The grinding | polishing method characterized by the above-mentioned. 10. The method according to any one of claims 6 to 9,
The medium has a circular section and a linear moving section having a continuous and identical cross-sectional area,
A polishing method, characterized in that it is formed by a shaft diameter portion that continuously reduces in diameter than the cross-sectional area. 11. The method of claim 10,
The said medium is a grinding | polishing method characterized by the rounding process of the acute part. The method of claim 10 or 11,
And a ratio between the diameter of the circular cross section and the length of the cross section orthogonal to the circular cross section is from 1: 0.5 to 1: 1.5.

Images