JP2008155286A - Method and apparatus for barrel polishing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a barrel polishing technique which does not produce the nicks caused by collisions of workpieces themselves, and does not cause the deformation and strain of the workpieces, and can achieve high polishing ability. <P>SOLUTION: Barrels 1 charged with workpieces W and abrasive media G are arranged in the state that the axes of the barrels 1 are tilted with respect to a vertical revolution main axis 5 (revolution axis). The barrels 1 revolve around the revolution main axis 5 in the horizontal direction, and rotate or stop about rotation spindle 15 (vertical axes) at a very slow rotation speed (specifically, a revolution speed of -1/20 to +1/20). By this method, the centrifugal force caused by the revolution of the barrel 1 effectively acts, and three dimensional relative movements can be given to the abrasive media G and the workpieces W by not only the horizontal movements but also the vertical movements induced by the cooperation with the tilted inner surfaces caused by tilting the barrels 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a barrel polishing method and apparatus, and more particularly, to a barrel polishing technique of a type in which a barrel tank filled with a workpiece and an abrasive is revolved in a horizontal direction.

  The barrel polishing technology is used for the purpose of deburring, smooth finishing, mirror finishing or R-finishing in the intermediate and / or final finishing process of various workpieces (hereinafter referred to as workpieces). The (medium) and the work are mixed and filled in a barrel tank at a predetermined ratio, the barrel tank is given a motion, and the work is polished by friction between the work and the abrasive.

  And as a method of giving motion to the barrel tank, there are polishing methods such as a rotating barrel, a vibrating barrel, a centrifugal barrel and a vortex barrel. Especially, the centrifugal barrel method is widely used in various manufacturing fields because of its high processing capability. Yes.

  In this centrifugal barrel system, the barrel tank provided on the rotary table is capable of rotating, and revolves while rotating by the rotation of the rotary table (planetary rotation), so that centrifugal force is applied to the workpiece and the abrasive in the barrel tank. The workpiece is polished by rubbing between the workpiece and the abrasive. In addition, the rotation motion of the barrel tank is rotated in the same direction as the revolution direction or in the opposite direction with a rotation speed about 1/2 of the revolution speed (for example, see Non-Patent Document 1).

However, even in such a centrifugal barrel system having excellent processing capability, (1) generation of dents between workpieces, (2) generation of deformation and distortion of workpieces, and (3) residual burrs and burrs due to insufficient polishing capability. There was a problem and further improvements were desired.
Edited by The Abrasive Processing Society of Japan, “Illustration of All Abrasive Processing Technology”, Industrial Research Co., Ltd., published on September 1, 2006, p. 106-107 ''

  The present invention has been made in view of such conventional problems. The object of the present invention is to improve the centrifugal barrel system so that there is no occurrence of dents between works, and deformation and distortion of the work occur. The object is to provide a barrel polishing method capable of obtaining a high polishing ability.

  Another object of the present invention is to provide a barrel polishing apparatus having a configuration for carrying out the barrel polishing method.

  In order to achieve the above object, the barrel polishing method of the present invention provides a centrifugal force to the workpiece and the abrasive in the barrel tank by revolving the barrel tank filled with the workpiece and the abrasive in the horizontal direction, A barrel polishing method for polishing a workpiece by rubbing between the workpiece and an abrasive material, wherein a barrel tank made of a cylindrical container provided with a tilted axis with respect to a vertical revolution axis, It is characterized by revolving around and rotating around a vertical axis or stopping at a predetermined rotation speed that is slowed down significantly than the revolution speed.

The following configuration is adopted as a preferred embodiment.
(1) The rotation speed is set to −1/20 to 1/20 of the revolution speed.

(2) The rotation speed of the barrel tank is −1/30 to −1/40 of the revolution speed.

(3) The rotation speed of the barrel tank is 1/40 to 1/30 of the revolution speed.

(4) The inclination angle rotation speed of the axis of the barrel tank is 10 to 30 degrees.

(5) The revolution speed of the barrel tank is 100 to 300 revolutions / minute.

  Further, the barrel polishing apparatus of the present invention is configured such that a centrifugal force is applied to the workpiece and the abrasive in the barrel tank by revolving the barrel tank filled with the workpiece and the abrasive in the horizontal direction. A barrel polishing apparatus for polishing a workpiece by rubbing a material, wherein a barrel tank composed of a cylindrical container is provided with a tilted axis with respect to a vertical revolution axis, and the barrel tank is provided with the revolution axis. It is characterized in that it is configured to rotate around the vertical axis at a predetermined rotation speed that is revolving around and at a slow predetermined rotation speed that is greatly decelerated from this revolution speed.

The following configuration is adopted as a preferred embodiment.
(1) The rotation speed is set to −1/20 to 1/20 of the revolution speed.

(2) The inclination angle of the axis of the barrel tank is set to 10 degrees to 30 degrees.

(3) A rotary table mounted horizontally with respect to a vertical rotary spindle and driven to rotate at a predetermined speed, and a rotary spindle rotatably supported on the rotary table, with respect to the rotary spindle And a barrel tank made of a cylindrical container attached in an inclined state, and the barrel tank is revolved at a predetermined speed around the rotation main shaft by the horizontal rotation of the rotary table. It is set as the structure which autorotates around the said rotation spindle at the autorotation speed of-1/20-1/20.

(4) The rotation driving of the rotating spindle is performed by a planetary gear mechanism including a sun gear provided concentrically with the rotating spindle and a planetary gear provided concentrically with the rotating spindle. It is supposed to be configured.

(5) The planetary gear mechanism includes the sun gear provided concentrically and stationary with the rotation main shaft, the planetary gear provided concentrically with the rotation support shaft, and the sun gear. At least one intermediate gear interposed between the gear and the planetary gear in a meshed state and rotatably supported by the rotary table is provided.

(6) The sun gear and the planetary gear are drivingly coupled via the single intermediate gear.

(7) The sun gear and the planetary gear are drivingly coupled via the two intermediate gears.

  This invention is made | formed as a result of the various test research based on the following viewpoints by this inventor.

  That is, the present inventor examined the behavior of the abrasive and the workpiece in the barrel tank in order to investigate the cause of the above three problems in the conventional centrifugal barrel system. Thus, it has been found that this bipolar phenomenon of the upper and lower sides causes collisions between workpieces and a reduction in polishing ability, causing the above three problems.

  Furthermore, when the factor which the said abrasive | polishing material and a workpiece | work isolate | separate up and down was investigated, in the conventional centrifugal barrel system, the centrifugal force produced by the revolution of a barrel tank is two-dimensional in the horizontal direction with respect to the abrasive | polishing material and a workpiece | work. As a result, it was found that the abrasive and the workpiece were separated from each other due to their own weight.

  As a result of further testing and research based on the knowledge thus obtained, the present inventor has completed the present invention.

  That is, according to the present invention, by rotating the barrel tank filled with the workpiece and the abrasive in the horizontal direction, a centrifugal force is applied to the workpiece and the abrasive in the barrel tank, and the workpiece and the abrasive are rubbed. In the barrel polishing method in which workpieces are polished by mating, a barrel vessel consisting of a cylindrical container provided with its axis inclined with respect to a vertical revolution axis is caused to revolve around the revolution axis and the revolution speed. Since it is made to rotate around the vertical axis at a predetermined rotation speed that is slowed down significantly, more specifically, at a rotation speed of −1/20 to 1/20 of the revolution speed, The centrifugal force generated by the revolution is effectively and sufficiently exhibited, and it does not stop in the horizontal direction with respect to the abrasive and the workpiece, and also works in cooperation with the inclined inner surface due to the inclination of the barrel tank. Also induce up-and-down direction of the movement that.

  As a result, the difference between the weight of the abrasive and the workpiece also works effectively, and the fluid and the workpiece flow in the vertical and horizontal directions in the barrel tank without being separated from each other (three-dimensional relative motion). The collision is effectively prevented, and the workpiece and the abrasive are efficiently rubbed together, so that the workpiece can be polished with a high polishing ability (1/2 to 1 compared with a conventional centrifugal barrel type barrel polishing apparatus). / The work can be finished in less than 3 times.)

  Further, by realizing the “three-dimensional relative motion of the workpiece and the abrasive” which cannot be achieved by the conventional centrifugal barrel method, the three problems in the conventional centrifugal barrel method polishing, namely (1 The problems of the occurrence of dents between the workpieces, (2) the deformation and distortion of the workpieces, and (3) the remaining of burrs and burrs due to insufficient polishing ability have been greatly reduced or eliminated.

  In particular, by setting the rotation speed of the barrel tank to a low speed of −1/20 to 1/20 of the revolution speed or zero, the centrifugal force generated by the rotation of the barrel tank is the centrifugal force generated by the revolution of the barrel tank. Can be effectively exhibited to the maximum extent without canceling out and smooth three-dimensional relative motion can be ensured.

  In addition, by rotating the barrel tank at a very slow rotation speed of −1/20 to 1/20 of the revolution speed, the abrasive and workpiece present in the corner of the barrel tank are also caused by the revolution of the barrel tank. Centrifugal force acts effectively, and all abrasives and workpieces in the barrel tank perform a smooth three-dimensional relative motion, and all workpieces can be uniformly polished with high polishing ability.

  Further, in the barrel polishing apparatus of the present invention, in addition to the above-described effects, a rotating support shaft is rotatably supported on a horizontally rotating rotary table, and a barrel tank is rotated by the rotating table. The barrel tank is mounted in an inclined state with respect to the main shaft, and the barrel tank is revolved around the rotation main shaft at a predetermined speed by the horizontal rotation of the rotary table, and is rotated around the rotation support shaft. The rotation driving of the rotating spindle for rotating the barrel tank is performed by a planetary gear mechanism including a sun gear provided concentrically with the rotating spindle and a planetary gear provided concentrically with the rotating spindle. With this configuration, the revolving motion and rotation motion of the barrel tank are performed by a single drive source, the device structure is simple and compact, and maintenance is easy. Ukoto can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Throughout the drawings, the same reference numeral indicates the same component or element.

  A barrel polishing apparatus according to the present invention is shown in FIGS. 1 to 4. Specifically, as shown schematically in FIG. 4, this barrel polishing apparatus includes a number of workpieces W, W,. When the barrel tank 1 filled with the abrasives (media) G, G,... Revolves in the horizontal direction, the workpiece W, W,... And the abrasives G, G,. Is a centrifugal barrel type having a configuration in which the workpieces W, W,... Are polished by friction between the workpieces W, W,.

  The barrel polishing apparatus is composed mainly of a rotary table 2 that constitutes the revolution means of the barrel tank 1 and a planetary gear mechanism 3 that constitutes the rotation means of the barrel tank 1, and these constituent parts 1, 2, and 3 are apparatus cases. 4 in the device. In the device case 4, 30 is a lid that can be opened and closed, 31 is a free caster as means for moving the device case 4, and 32 is a level adjuster for adjusting the posture of the device case 4 in a horizontal state.

  The rotary table 2 has a disk shape, is mounted horizontally with respect to the vertical main spindle 5 and is driven to rotate at a predetermined speed.

  In the illustrated embodiment, a spindle stock 7 is provided at the center position of the base frame 6 of the apparatus case 4, and the rotary spindle 5 rotates in a vertical state via the rotary bearings 8, 8 on the spindle stock 7. The rotary table 2 is mounted and supported on the upper end portion of the rotary main shaft 5 in a horizontal state by a fixture 9. A geared motor 10 as a drive motor is mounted in a horizontal state on the headstock 7 on which the lower portion of the rotating spindle 5 is pivotally supported. Although not specifically shown, the output shaft of the geared motor 10 is not shown. In addition, the lower part of the rotating spindle 5 is directly gear-coupled.

  The rotary table 2 is rotationally driven in the horizontal direction at a predetermined rotational speed together with the rotary spindle 5 by the rotational drive of the geared motor 10.

  The barrel tank 1 is composed of a cylindrical container that can be sealed, and a plurality of barrel tanks 1 are attached to the outer peripheral position of the rotary table 2 at equal intervals in the circumferential direction.

  In the illustrated embodiment, the barrel tank 1 is a urethane container, and although not specifically illustrated, a cylindrical container having a polygonal column shape outline having a cross-sectional shape in which the inner peripheral surface is a polygon, specifically, The inner peripheral surface is in the form of a cylindrical container having an octagonal prism shape contour, and is configured to be mounted on the turntable 2 by four.

  That is, the four rotation support shafts 15, 15,... Are arranged at equal intervals in the circumferential direction at the outer peripheral position of the turntable 2, and each rotation support shaft 15 is in a vertical state by the bearings 16, 16, that is, A barrel tank receiver 17 is mounted and fixed in an inclined state on an upper end portion 15a of the rotation support shaft 15 so as to be able to remove and accommodate the barrel tank 1 so as to be removable. Reference numeral 35 denotes a presser fitting for fixing the barrel tank 1 to the barrel tank receiver 17.

  The barrel tank receiver 17 has a bottom portion fixed to the upper end portion 15a of the rotation support shaft 15, and an upper portion opened to accommodate and hold the barrel tank 1 from above. Then, in a state where the barrel tank 1 is accommodated in the barrel tank receiver 17, the barrel tank 17 has an axis inclined at a predetermined angle α with respect to an axis (revolution axis) X of the rotation main shaft 5 described later. It is configured.

  The inclination angle α of the axis of the barrel tank 1 is specifically set to 10 degrees to 30 degrees, preferably 12 degrees to 20 degrees, and in the illustrated embodiment, the inclination angle α is 15 degrees. .

  The inclination angle α is set in this way when the inclination angle α is smaller than 10 degrees or larger than 30 degrees due to the revolution of the inner peripheral inclined surface of the barrel tank 1 and the barrel tank 1 described later. When the collaborative action with the centrifugal force cannot be obtained reliably and the inclination angle α is larger than 30 degrees, the contents filled and accommodated in the barrel layer 1 when the barrel tank 1 is attached to the barrel tank receiver 17 This is because there is a structural problem in the wet barrel polishing apparatus that spills outside.

  The planetary gear mechanism 3 constitutes the rotation means of the barrel tank 1 as described above, and is provided concentrically at least with the sun gear 20 provided concentrically with the rotation main shaft 5 and the rotation support shaft 15. Specifically, the sun gear 20, the planetary gear 21, and at least one intermediate gear interposed between the sun gear 20 and the planetary gear 21 in a meshed state. 22. The number of the intermediate gears 22 is set in consideration of the rotation direction and the rotation speed of the planetary gear 21, that is, the barrel tank 1. In the illustrated embodiment, the sun gear 20 and the planetary gear 21 are drivingly connected via a single intermediate gear 22 so that the planetary gear 21, that is, the barrel tank 1 is opposite to the revolution direction (the rotation direction of the rotary table 2). It is configured to rotate in the direction.

  The sun gear 20 is provided concentrically and stationaryly with the rotary main shaft 5 of the rotary table 2. Specifically, as shown in FIG. 2, the sun gear 20 is attached to the rotary main shaft 25 via bearings 25 and 25. The shaft is supported so as to be relatively rotatable, and its rotational motion is stationary and fixed by an anti-rotation means (not shown).

  The planetary gear 21 is provided concentrically and integrally with the rotary support shaft 15 that is rotatably supported on the rotary table 2. Specifically, as shown in FIG. It is integrally attached to the lower end portion of the rotating support shaft 15 protruding downward.

  The intermediate gear 22 is interposed between the sun gear 20 and the planetary gear 21 in an engaged state. Specifically, as shown in FIG. 2, the intermediate gear 22 is arranged on the rotary table 2 below the rotary table 2. The rotary shaft 26 is supported and fixed so as to be rotatable via bearings 27, 27 and meshed with the sun gear 20 and the planetary gear 21.

  When the rotary table 2 rotates horizontally as a result of the rotation of the rotary spindle 5, the four barrel tanks 1, 1,... Arranged and supported on the rotary table 2 have a predetermined speed around the rotary spindle 5. And the planetary gear mechanism 3 accompanying the revolution motion is rotated or stopped at a very slow rotation speed.

  More specifically, referring to FIG. 3, the four barrel tanks 1, 1,... Arranged and supported on the rotary table 2 are also rotated (revolved) by the rotation of the rotary table 2 (arrow X direction). However, the planetary gears 21 of the planetary gear mechanism 3 are attached and fixed to the rotation support shafts 15, 15,... Of the barrel tanks 1, 1,. In the planetary gear mechanism 3, the sun gear 20 is stationary and fixed as described above. Therefore, the planetary gear 21 is rotated around the sun gear 20 through the intermediate gear 22 meshed with both the gears 20 and 21. While revolving in the X direction, the vehicle rotates or stops in a direction opposite to the revolving direction with a slow revolving speed that is significantly reduced from the revolving speed.

  In this case, the rotation speed of the barrel tank 1 is determined by the gear ratio of the sun gear 20, the intermediate gear 22 and the planetary gear 21 constituting the planetary gear mechanism 3, and specifically, −1/20 to 0 of the revolution speed. It is preferably set to −1/30 to −1/40. The revolution speed of the barrel tank 1 is set to 100 to 300 rotations / minute in consideration of the effective centrifugal force. Therefore, the rotation speed of the barrel tank 1 is set to 5 rotations to 15 rotations / minute. Is set.

  In this way, the rotation speed of the barrel tank 1 is set to a slow value that is significantly decelerated from the revolution speed so that the effect of centrifugal force generated by the revolution of the barrel tank 1 is effectively exhibited. It is to do. That is, when the rotation speed of the barrel tank 1 is greater than 1/20 of the revolution speed, the effect of centrifugal force generated on the abrasives G, G,... And the workpieces W, W,. The abrasive G in the barrel tank 1 is reduced by the effect of the centrifugal force generated on the abrasives G, G,... And the workpieces W, W,. , G,... And workpieces W, W,... Cannot be vigorously moved. On the other hand, when the rotation speed of the barrel tank 1 is 0 to 1/20 of the revolution speed, the barrel tank 1 revolves. The effect of centrifugal force generated on the abrasives G, G,... And the workpieces W, W,... Is sufficiently exhibited, and the movement of the abrasives G, G,. Due to the cooperative action with the inclined inner surface by the inclination angle α of the barrel tank 1 without stopping. This is because a downward movement is also induced (three-dimensional relative motion), and this effect is greater when the rotation speed of the barrel tank 1 is set to -1/30 to -1/40 of the revolution speed. The effect is obtained.

  In addition, the barrel tank 1 is rotated at a very slow rotation speed of 1/20 or less of the revolution speed as described above, rather than the case where the barrel tank 1 is only rotated and does not rotate (that is, when the rotation speed is 0). .. And abrasives G, G,... And workpieces W, W,... Existing in the corners of 1 are effectively affected by the centrifugal force due to the revolution of the barrel tank 1, and all the abrasives G in the barrel tank 1 are obtained. , G,... And workpieces W, W,... Can perform a smooth three-dimensional relative motion.

  In the illustrated embodiment, the rotation speed of the barrel tank 1 is set to 1/36 of the revolution speed.

  In addition, as the abrasives G, G,... Charged into the barrel tank 1 together with the workpieces W, W,..., Ceramic materials are often used. Many are selected and used in consideration of the following conditions.

(I) For deburring the workpieces W, W,..., Abrasives G, G,.

(Ii) For polishing the workpieces W, W,..., Fine abrasives G, G,... For rough polishing or abrasives G, G,.

(Iii) When polishing the workpieces W, W,..., Fine polishing materials G, G,... For finishing are selected, and in this case, the processing time is set longer.

(Iv) The shape and size are selected so that the abrasives G, G,... Are not clogged as much as possible in the workpieces W, W,... (For example, when the workpiece is a hole of the workpieces W, W,. (The clogging can be relatively reduced by selecting the abrasive G, G,... Having a size of about 2/3 of the hole diameter.)

(V) When it is necessary to polish the inner corner portions of the workpieces W, W,..., The finest possible abrasives G, G,.

  Thus, in the barrel polishing apparatus configured as described above, a number of workpieces W, W,... And abrasives G, G are provided on barrel tank receivers 17, 17,. When the rotary table 2 is rotationally driven in a state where the barrel tanks 1 filled and accommodated are respectively held and held, the barrel tank 1 is revolved horizontally around the vertical rotation main shaft (revolution shaft) 5. A centrifugal force is applied to the workpieces W, W,... In the barrel tank 1 and the abrasives G, G,..., And the workpieces W, W,. W, ... will be polished.

  In this case, each of the barrel tanks 1, 1,... Is attached to the rotation support shaft 15 with its axis inclined with respect to the rotation main shaft (revolution shaft) 5, and the planetary gear mechanism 3 associated with the revolution motion is provided. Due to the decelerating rotation action, the rotation is performed in a direction opposite to the revolution direction X with a very slow rotation speed (in the illustrated embodiment, 1/36 of the revolution speed).

  As a result, the behavior of the workpieces W, W,... And the abrasives G, G,... Filled in each barrel tank 1, particularly the behavior of the abrasives G, G,. It hits the inclined inner surface of the tank 1 and rebounds randomly and moves three-dimensionally, and the abrasives G, G,... Flow so as to be kneaded inward toward the center as shown by arrows.

  Such a behavior is due to the fact that the centrifugal force generated by the revolution of the barrel tank 1 does not stop in the horizontal direction with respect to the abrasives G, G,... And the workpieces W, W,. The vertical movement caused by the cooperation with the inclined inner surface is also induced. As a result, the abrasives G, G,... And the workpieces W, W,. It is considered that the fluid flows integrally in the barrel tank 1 in the vertical and horizontal directions (three-dimensional relative motion).

  And since the three-dimensional relative motion of such abrasives G, G,... And workpieces W, W,... Is possible, the following effects can be obtained.

(1) The workpieces W, W,... Always exist in the abrasive G, G,..., And collision between the workpieces is effectively prevented, and as a result, the workpieces W, W,. The occurrence rate of dents due to is greatly reduced.

(2) Work W, W,..., Such as a press-processed product, is also deformed or distorted due to entanglement between the workpieces W, W,... Always present in the abrasive G, G,. , W,... Are not easily entangled with each other, and the occurrence of deformation and distortion is reduced.

(3) Since the workpieces W, W,... Always exist in the abrasives G, G,..., The workpieces W, W,. As a result, the number of times increases, and as a result, the polishing ability is remarkably higher than that of the conventional centrifugal barrel type, and the workpieces W, W,... Can be polished with high polishing ability.

  As a result of conducting a polishing performance comparison test between the barrel polishing apparatus of the present embodiment and the conventional centrifugal barrel type barrel polishing apparatus, the barrel polishing apparatus of the present embodiment takes less than 1/3 of the time of the conventional barrel polishing apparatus. It has been found that workpieces W, W,... Can be finished.

  In particular, the rotation speed of the barrel tank 1 is set to a low speed or zero of −1/20 to 0 (more desirably −1/30 to −1/40 (1/36 in the present embodiment)) of the revolution speed. By setting, the centrifugal force generated by the rotation of the barrel tank 1 can be effectively exhibited to the maximum extent without canceling the centrifugal force generated by the revolution of the barrel tank 1, and a smooth three-dimensional relative motion can be ensured. .

  Further, by rotating the barrel tank 1 at such a very slow rotation speed, the barrel tank 1 is also applied to the abrasives G, G,... And workpieces W, W,. The centrifugal force due to the revolution of the material acts effectively, and all the abrasives G, G,... In the barrel tank 1 and the workpieces W, W,. Can be uniformly polished with high polishing ability.

  Further, in the barrel polishing apparatus of the present embodiment, in addition to the above effects, the rotary support shafts 15, 15,... Are rotatably supported on the horizontally rotating rotary table 2, and these rotary support shafts are also supported. The barrel tanks 1 are respectively attached to the rotary tables 2 in a state where the barrel tanks 1 are inclined with respect to the rotary main shaft 5 of the rotary table 2, and each barrel tank 1 is rotated at a predetermined speed around the rotary main shaft 5 by the horizontal rotation of the rotary table 2. (In this embodiment, it is configured to revolve around 100 to 300 revolutions / minute) and to rotate around the rotation support shaft 15, and the rotation drive of the rotation support shaft 15 that rotates the barrel tank 1 is performed as described above. The planetary gear mechanism 3 includes a sun gear 20 provided concentrically with the rotation main shaft 5 and a planetary gear 21 provided concentrically with the rotation support shaft 15. By there, rotation movement and revolution movement of the barrel tank 1 is performed by a single driving source (geared motor) 10, a simple and compact apparatus structure, it can be easily performed maintenance.

  Note that the above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.

  For example, in the planetary gear mechanism 3 of the illustrated embodiment, the sun gear 20 and the planetary gear 21 are drivingly connected via a single intermediate gear 22 so that the barrel tank 1 is rotated in the revolution direction (the rotation direction of the rotary table 2). ) Although it is configured to rotate in the direction opposite to X, specifically, although not shown, the sun gear 20 and the planetary gear 21 hold the relationship between the revolution speed and the rotation speed described above, The barrel tank 1 may be rotated in the same direction as the revolution direction X by being driven and connected via the two intermediate gears 22 and 22.

It is a front view which partially cuts and shows the barrel polishing apparatus which is Embodiment 1 of this invention. It is a front sectional view showing the internal structure of the barrel polishing apparatus. FIG. 3A is a plan sectional view taken along line AA in FIG. 2, and FIG. 3B is a plan sectional view taken along line BB in FIG. It is a schematic diagram which shows the behavior of the abrasive | polishing material in a barrel tank and a workpiece | work at the time of operation | movement of the barrel polishing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Barrel tank 2 Rotary table 3 Planetary gear mechanism 5 Rotation main shaft 10 Geared motor (drive source)
15 Rotating spindle 17 Barrel tank holder 20 Sun gear 21 Planetary gear 22 Intermediate gear W Work G Abrasive

Claims (14)

By revolving the barrel tank filled with the workpiece and abrasive in the horizontal direction, centrifugal force is applied to the workpiece and abrasive in the barrel tank, and the workpiece is rubbed by friction between these workpiece and abrasive. A barrel polishing method for polishing,
A barrel tank composed of a cylindrical container provided with its axis inclined with respect to a vertical revolution axis is revolved around the revolution axis and is slowly reduced to a predetermined predetermined speed that is significantly reduced than the revolution speed. A barrel polishing method characterized by rotating or stopping about a vertical axis at a rotation speed. The barrel polishing method according to claim 1, wherein the rotation speed is set to -1/20 to 1/20 of the revolution speed. The barrel polishing method according to claim 2, wherein the rotation speed of the barrel tank is −1/30 to −1/40 of the revolution speed. The barrel polishing method according to claim 3, wherein the rotation speed of the barrel tank is 1/40 to 1/30 of the revolution speed. The barrel polishing method according to any one of claims 1 to 4, wherein an inclination angle rotation speed of an axis of the barrel tank is 10 to 30 degrees.   The barrel polishing method according to claim 1, wherein the revolution speed of the barrel tank is 100 to 300 revolutions / minute. As the barrel tank filled with the workpiece and abrasive material revolves in the horizontal direction, centrifugal force is applied to the workpiece and abrasive material in the barrel tank, and the workpiece is rubbed by friction between the workpiece and the abrasive material. A barrel polishing apparatus for polishing
A barrel tank made of a cylindrical container is provided with its axis inclined with respect to a vertical revolution axis,
The barrel tank is configured to revolve around the revolution axis and to rotate or stop around the vertical axis at a slow predetermined revolution speed that is significantly reduced than the revolution speed. Barrel polishing equipment. The barrel polishing apparatus according to claim 7, wherein the rotation speed is set to −1/20 to 1/20 of the revolution speed. The barrel polishing apparatus according to claim 8, wherein an inclination angle of an axis of the barrel tank is set to 10 degrees to 30 degrees. A turntable mounted horizontally with respect to a vertical rotation spindle and driven to rotate at a predetermined speed;
A rotation support shaft rotatably supported on the turntable includes a barrel tank made of a cylindrical container attached in a state inclined with respect to the rotation main shaft,
Due to the horizontal rotation of the rotary table, the barrel tank revolves around the rotation spindle at a predetermined speed and rotates around the rotation spindle at a rotation speed of −1/20 to 1/20 of the revolution speed. The barrel polishing apparatus according to claim 7, wherein the barrel polishing apparatus is configured as described above. The rotation driving of the rotating spindle is performed by a planetary gear mechanism including a sun gear provided concentrically with the rotating spindle and a planetary gear provided concentrically with the rotating spindle. The barrel polishing apparatus according to claim 10, wherein the apparatus is a barrel polishing apparatus. The planetary gear mechanism includes the sun gear concentrically and stationaryly provided with the rotation main shaft, the planetary gear provided concentrically and integrally with the rotation support shaft, the sun gear and the planetary gear. The barrel polishing apparatus according to claim 11, further comprising at least one intermediate gear interposed between the gears in a meshed state and rotatably supported by the rotary table. The barrel polishing apparatus according to claim 12, wherein the sun gear and the planetary gear are drivingly connected via a single intermediate gear. The barrel polishing apparatus according to claim 12, wherein the sun gear and the planetary gear are drivingly connected via the two intermediate gears.

Images