Barrel polishing equipment

Abstract

To provide a centrifugal barrel type barrel polishing device which is capable of performing sun-and-planet motion, allows a user to set and adjust motion conditions of the sun-and-planet motion optionally, and can flexibly deal with workpieces to be processed and meet demands of the user.SOLUTION: In a barrel polishing device, a barrel tank 1, which is filled with workpieces W and an abrasive material G, revolves in a horizontal direction to apply centrifugal force to the workpieces W and the abrasive material G in the barrel tank 1 and cause the workpieces W and the abrasive material G to rub against each other thereby polishing the workpieces W. The barrel tank 1 provided in a state that its axis X is inclined relative to a vertical revolution axis X0 revolves around the revolution axis X0 horizontally at a predetermined revolution speed and autorotates around a vertical axis at a predetermined slow autorotation speed, which is substantially slower than the revolution speed, or stops. A speed ratio of the autorotation speed to the revolution speed can be variably adjusted.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a barrel polishing machine, and more specifically to a barrel polishing technique in which a barrel tank filled with and containing workpieces and an abrasive is agitated to polish the workpieces by rubbing the workpieces against the abrasive. [Background technology]

[0002] Barrel polishing technology is used in the intermediate and / or final finishing process of various workpieces (hereinafter referred to as workpieces) for purposes such as deburring, smooth finishing, mirror finishing, and radiusing. Its basic principle is to mix abrasives (media) and workpieces in a specified ratio and fill a barrel tank, then give motion to the barrel tank, polishing the workpieces by rubbing against the abrasives.

[0003] As a method for imparting motion to the barrel tank, there are various polishing methods, such as rotating barrel, vibrating barrel, centrifugal barrel, and vortex barrel, and the centrifugal barrel method in particular has high processing capacity and is widely adopted in various manufacturing fields.

[0004] In this centrifugal barrel method, a barrel tank rotatably mounted on a rotating table rotates on its axis while revolving (planetary revolution) as the rotating table rotates, applying centrifugal force to the workpieces and abrasives in the barrel tank, polishing the workpieces by rubbing against each other. The rotational motion of the barrel tank is generally at a speed about half the revolution speed, and rotates in the same direction as or opposite to the revolution direction.

[0005] However, even with this centrifugal barrel method, which has excellent machining capabilities, there are problems such as (i) the occurrence of dents between the workpieces, (ii) the occurrence of deformation and distortion of the workpieces, and (iii) the remaining burrs due to insufficient polishing capabilities, and further improvements were required.

[0006] In regard to this point, the present applicant has developed and proposed a barrel polishing machine described in Patent Document 1.

[0007] This barrel polishing machine is configured such that a rotating support shaft is rotatably supported in a vertical state parallel to the rotating main shaft on a rotating table which is attached horizontally to a vertical rotating main shaft and driven to rotate at a predetermined revolution speed, and a barrel tank which fills and contains workpieces and abrasives is attached and held on this rotating support shaft with its axis inclined at a predetermined angle to the rotating main shaft, and the rotating support shaft and the rotating table are drivingly connected to a single rotary drive unit by a planetary gear mechanism.

[0008] The rotary drive unit rotates the rotary table horizontally, causing the barrel tank to perform planetary motion around the main axis of rotation while tilted, so that the abrasive material and the workpieces filled and stored in the barrel tank flow vertically and horizontally (three-dimensional relative motion) as one unit without being separated from each other. As a result, the abrasive material and the workpieces rub against each other efficiently, and the workpieces are polished with high polishing ability, thus solving the above-mentioned problems with the centrifugal barrel system. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2008-155286 A Summary of the Invention [Problem to be solved by the invention]

[0010] Incidentally, the workpieces to be barrel polished include a wide variety of materials ranging from metallic to non-metallic materials, and also come in a variety of shapes and dimensions. It has been experimentally demonstrated that the planetary motion in the above-mentioned barrel polishing apparatus has optimal motion conditions for each of these workpieces, i.e., the speed ratio between the rotational speed and revolution speed of the above-mentioned barrel tank.

[0011] Also, for users who actually carry out barrel polishing using the barrel polishing apparatus, there has been a demand to be able to arbitrarily set the optimum motion conditions as desired by the users, taking into consideration the finishing accuracy and finishing speed.

[0012] Therefore, ideally, it would be desirable to adjust and set the motion conditions of the planetary motion for each workpiece to be polished or for each user. However, since the planetary motion in the barrel polishing apparatus is performed by a planetary gear mechanism, adjusting and setting the motion conditions requires the manufacturer to change the design of the planetary gear mechanism, which is not necessarily an easy task and is expensive, making it practically difficult or impossible.

[0013] That is, the planetary gear mechanism in the barrel polishing machine has a structure in which the rotary support shaft and the rotary table are drivingly connected to a single rotary drive unit by a planetary motion mechanism, and the speed ratio between the rotation speed and the revolution speed of the barrel tub which controls the planetary motion is designed uniformly by the manufacturer. In order to change the settings of the motion conditions of this planetary motion, the manufacturer needs to change the gear ratio between the constituent gears in the planetary gear mechanism. However, due to the structure, this work requires removing the planetary gear mechanism itself from the machine and replacing it with a planetary gear mechanism having the desired gear ratio. Moreover, the necessary information which is a premise for determining the desired gear ratio is mainly obtained from the actual user, and in practice, it has been difficult or impossible to change the settings of the motion conditions.

[0014] The present invention has been made in consideration of the above-mentioned problems in the conventional art, and an object of the present invention is to provide a highly versatile barrel polishing machine of a centrifugal barrel type that performs planetary motion, in which the motion conditions of the planetary motion can be set and adjusted as desired, and which can flexibly respond to the workpieces to be processed and the needs of the user. [Means for solving the problem]

[0015] In order to achieve the above object, a first barrel polishing machine of the present invention is a barrel polishing machine in which a barrel tank filled with workpieces and an abrasive revolves in a horizontal direction, thereby applying centrifugal force to the workpieces and the abrasive in the barrel tank, and polishing the workpieces by rubbing against each other between the workpieces and the abrasive, and the machine is provided with a revolving means for revolving the barrel tank in the horizontal direction, a rotating means for rotating the barrel tank in the horizontal direction, and a control means for automatically controlling the revolving means and the rotating means in cooperation with each other, and the revolving means is attached horizontally to a vertical main rotation shaft and rotates at a predetermined revolving speed. and a revolution drive unit that drives the rotation main shaft, the rotation means includes a rotation support shaft that is rotatably supported on the rotation table in a vertical state parallel to the rotation main shaft and is driven to rotate at a predetermined rotation speed, and a rotation drive unit that drives the rotation support shaft, and the barrel tank is attached to the rotation support shaft in a state inclined with respect to the rotation main shaft, the revolution drive unit is a revolution drive motor directly connected to the rotation main shaft, and the rotation drive unit is a rotation drive motor and a rotation drive unit that drives the rotation of the rotation drive motor. and a belt transmission mechanism for transmitting a driving force to the rotation support shaft, the belt transmission mechanism being composed of a first transmission mechanism consisting of a drive gear attached to the output shaft of the rotation drive motor, a driven gear supported on the rotation main shaft so as to be freely rotatable, and a toothed belt drivingly connecting these two gears, and a second transmission mechanism consisting of a rotation gear attached concentrically and integrally to the rotation support shaft, a main shaft gear supported on the rotation main shaft so as to be freely rotatable, and a toothed belt drivingly connecting these two gears, and the driven gear of the first transmission mechanism and the main shaft gear of the second transmission mechanism are coaxially and integrally coupled to each other, and the control means is configured to control the revolution drive motor of the revolution means and the rotation drive motor of the rotation means so that the revolution speed and the rotation speed of the barrel tub become an arbitrary speed ratio by independently adjusting and setting the revolution speed and the rotation speed of the barrel tub, whereby the barrel tub revolves horizontally around the axis of the rotation main shaft at a predetermined revolution speed, and rotates or stops around the axis of the rotation support shaft at a slow predetermined rotation speed which is significantly slower than the revolution speed, The rotation speed is set to -1 / 20 to 1 / 20 of the revolution speed,The speed ratio of the rotation speed to the revolution speed is variably adjustable.

[0016] As a preferred embodiment, the following configuration is adopted. (1) A barrel tank receiver is attached to the rotating support shaft supported on the rotating table with its axis inclined at a predetermined angle relative to the main rotating shaft, and the barrel tank is coaxially housed and held in the barrel tank receiver so that it can be removed from above.

[0017] (2) The driven gear and the main shaft gear are composed of a single gear.

[0018] (3) A plurality of the rotating shafts are arranged at equal intervals in the circumferential direction at the outer periphery of the rotating table, and a single main shaft gear is drivingly connected to the rotation gears attached to the plurality of rotating shafts, thereby forming a main shaft gear shared structure.

[0019] (4) A speed setting means is provided for setting the revolution speed and rotation speed of the barrel tank.

[0020] (5) A speed ratio setting means is provided for setting the speed ratio between the revolution speed and the rotation speed of the barrel tank 1.

[0022] (7) The revolution speed of the barrel tank is set to 100 to 300 revolutions per minute.

[0023] (8) The inclination angle of the axis of the barrel tank is set to 10 degrees to 30 degrees.

[0024] A second barrel polishing machine of the present invention is a barrel polishing machine in which a barrel tank filled with workpieces and an abrasive revolves in a horizontal direction, thereby applying centrifugal force to the workpieces and the abrasive in the barrel tank, and polishing the workpieces by rubbing against each other between the workpieces and the abrasive. The barrel polishing machine comprises a revolving means for revolving the barrel tank in the horizontal direction, a rotating means for rotating the barrel tank in the horizontal direction, and a control means for automatically controlling the revolving means and the rotating means in cooperation with each other, and the revolving means is attached horizontally to a vertical main rotation shaft and rotates at a predetermined revolving speed. The rotating means includes a rotary table that is rotated and a revolution drive unit that rotates the rotary main shaft, the rotation means includes a rotary support shaft that is rotatably supported on the rotary table in a vertical state parallel to the rotary main shaft and is rotated at a predetermined rotation speed, and a rotation drive unit that rotates the rotary support shaft, and the barrel tank is attached to the rotary support shaft in a state inclined with respect to the rotary main shaft, the revolution drive unit is a revolution drive motor directly connected to the rotary main shaft, and the rotation drive unit is a rotation drive motor and a rotation drive unit that drives the rotation of the rotation drive motor. and a gear mechanism for transmitting a rotation driving force to the rotation support shaft, the gear mechanism being composed of a first transmission mechanism consisting of a drive gear attached to the output shaft of the rotation drive motor, a driven gear supported on the rotation main shaft so as to be freely rotatable, and a toothed belt drivingly connecting these two gears, and a second transmission mechanism consisting of a rotation gear attached concentrically and integrally to the rotation support shaft, a main shaft gear supported on the rotation main shaft so as to be freely rotatable, and an intermediate gear drivingly connecting these two gears, the driven gear of the first transmission mechanism and the main shaft gear of the second transmission mechanism being arranged coaxially. and the control means is configured to control the revolution drive motor of the revolution means and the rotation drive motor of the rotation means so that the revolution speed and the rotation speed of the barrel tub become an arbitrary speed ratio by independently adjusting and setting the revolution speed and the rotation speed of the barrel tub, whereby the barrel tub revolves horizontally around the axis of the rotation main shaft at a predetermined revolution speed, and rotates or stops around the axis of the rotation support shaft at a slow predetermined rotation speed which is significantly slower than the revolution speed, The rotation speed is set to -1 / 20 to 1 / 20 of the revolution speed,The speed ratio of the rotation speed to the revolution speed is variably adjustable.

[0025] As a preferred embodiment, the following configuration is adopted. (1) The driven gear and the main shaft gear are composed of a single gear.

[0026] (2) A plurality of the rotating shafts are arranged at equal intervals in the circumferential direction at the outer periphery of the rotating table, and a single main shaft gear is drivingly connected to the rotation gears attached to the plurality of rotating shafts, thereby forming a main shaft gear shared structure.

[0027] (3) A speed setting means is provided for setting the revolution speed and rotation speed of the barrel tank.

[0028] (4) A speed ratio setting means is provided for setting the speed ratio between the revolution speed and the rotation speed of the barrel tank.

[0030] (6) The revolution speed of the barrel tank is set to 100 to 300 revolutions per minute.

[0031] (7) The inclination angle of the axis of the barrel tank is set to 10 degrees to 30 degrees. Effect of the Invention

[0034] According to the barrel polishing apparatus of the present invention, The barrel tank is provided with a revolving means for revolving the barrel tank in a horizontal direction, a rotation means for rotating the barrel tank in a horizontal direction, and a control means for automatically controlling the revolving means and the rotation means in cooperation with each other, the revolving means includes a rotary table that is attached horizontally to a vertical rotary main shaft and is driven to rotate at a predetermined revolving speed, and a revolution drive unit that drives the rotary main shaft, the rotation means includes a rotary support shaft that is rotatably supported on the rotary table in a vertical state parallel to the rotary main shaft and is driven to rotate at a predetermined rotation speed, and a rotation drive unit that drives the rotary support shaft, The barrel tank is attached to a rotation support shaft in a state inclined with respect to the main rotation shaft, the revolution drive unit is a revolution drive motor directly connected to the main rotation shaft, the rotation drive unit is composed of a rotation drive motor and a belt transmission mechanism or a gear mechanism that transmits the rotational drive force of the rotation drive motor to the rotation support shaft, and the control means is configured to control the revolution drive motor of the revolution means and the rotation drive motor of the rotation means so that the revolution speed and the rotation speed of the barrel tank become an arbitrary speed ratio by independently adjusting and setting the revolution speed and the rotation speed of the barrel tank, thereby The barrel tank is The axis of the above rotating shaft Around Revolution of The planet revolves horizontally at a speed and rotates at a slow, specified speed that is significantly slower than the speed of the orbit. Axis of the above rotating shaft Since the centrifugal barrel type barrel polishing machine is configured to rotate or stop around the axis, and the speed ratio of the rotation speed to the revolution speed is variably adjustable, the motion conditions of the planetary motion can be arbitrarily set and adjusted in the centrifugal barrel type barrel polishing machine which performs planetary motion, and a highly versatile barrel polishing machine which can flexibly respond to the workpieces to be processed and the requests of the user can be provided.

[0035] That is, in a centrifugal barrel type barrel polishing machine that performs planetary motion, the barrel tank revolves horizontally around the main rotation shaft at a predetermined speed, and at the same time, oscillates and rotates in an inclined state relative to the main rotation shaft at a predetermined slow rotation speed that is significantly slower than the revolution speed. This realizes "three-dimensional relative motion between the workpiece and the abrasive" that is not possible with a general centrifugal barrel type, and significantly reduces or eliminates the above-mentioned three problems (i) to (iii) in the polishing process of the centrifugal barrel type. Furthermore, in the present invention, the speed ratio of the rotation speed of the barrel tank to the revolution speed is variably adjustable, so that the motion conditions of the planetary motion that are optimal for the material and shape and dimensions of each workpiece to be barrel polished can be set for each workpiece to be barrel polished, and the user who actually performs the barrel polishing can also arbitrarily set the motion conditions of the planetary motion that is optimal for the user's desire by taking into consideration the finishing accuracy and the finishing speed. [Brief description of the drawings]

[0036] [Figure 1] 1 is a side view showing a barrel polishing machine according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a partially cutaway front view showing the internal structure of the barrel polishing apparatus. [Diagram 3] FIG. 3 is a plan sectional view taken along line III-III in FIG. 2, showing the barrel polishing apparatus. [Figure 4] FIG. 4 is a plan sectional view taken along line IV-IV in FIG. 2, showing the barrel polishing apparatus. [Diagram 5] FIG. 2 is an enlarged front view showing a main component part of the barrel polishing apparatus. [Figure 6] FIG. 2 is a block diagram showing a control configuration of the barrel polishing apparatus. [Figure 7] 3 is a schematic diagram showing the behavior of the abrasive and the workpiece in the barrel tank during operation of the barrel polishing apparatus. FIG. [Figure 8] FIG. 5 is a partially cutaway front view showing the internal structure of a barrel polishing machine according to a second embodiment of the present invention. [Figure 9]FIG. 9 is a plan sectional view taken along line IX-IX in FIG. 8, showing the barrel polishing apparatus. [Figure 10] FIG. 2 is an enlarged front view showing a main component part of the barrel polishing apparatus. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0037] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In addition, the same reference numerals denote the same components or elements throughout the drawings.

[0038] EMBODIMENT 1 A barrel polishing apparatus according to the present invention is shown in Figs. 1 to 7. As shown diagrammatically in Fig. 7, this barrel polishing apparatus is of a centrifugal barrel type having a configuration in which a barrel tank 1 filled with a large number of workpieces W, W, ... and abrasives (media) G, G, ... revolves horizontally, thereby applying centrifugal force to the workpieces W, W, ... and the abrasives G, G, ... in the barrel tank 1, and the workpieces W, W, ... are polished by rubbing against each other.

[0039] Specifically, in the barrel polishing apparatus of this embodiment, the barrel tank 1 is installed with its axis X inclined relative to a vertical revolution axis, i.e., an axis X0 of a rotating main shaft 10, and the barrel tank 1 revolves horizontally around the revolution axis X0 at a predetermined revolution speed, and rotates or stops around a vertical axis, i.e., an axis X1 of a rotating support shaft 15 at a predetermined slow rotation speed that is significantly slower than the revolution speed.

[0040] The barrel polishing apparatus is configured as main components including the barrel tank 1, the revolving means 2, the rotating means 3, and a control unit 4 as a control means for controlling the revolving means 2 and the rotating means 3, and these components 1 to 4 are arranged within an apparatus case 5.

[0041] The device case 5 is of an approximately rectangular parallelepiped shape with an openable and closable lid 5a at the top, and is provided with casters 6 at the bottom as a means for moving the device case 5, as well as a level adjuster 7 for adjusting the position of the device case 5 to a horizontal position when the device case 5 is in a fixed installation state.

[0042] The barrel tank 1 is a sealable cylindrical container that fills and accommodates the workpieces W, W, ... to be polished together with the abrasives (media) G, G, .... The barrel tank 1 in the illustrated embodiment is a urethane container, and although not specifically shown, it is in the form of a cylindrical container with a polygonal prism-shaped contour whose inner periphery has a polygonal cross-sectional shape, specifically, a cylindrical container with an octagonal prism-shaped contour whose inner periphery has a polygonal cross-sectional shape.

[0043] A plurality of the barrel tanks 1 are removably attached at equal intervals in the circumferential direction on a rotary table 8 of the revolving means 2 described later. In the illustrated embodiment, four barrel tanks 1, 1, ... are removably attached at equal intervals in the circumferential direction at positions on the outer periphery of the rotary table 8.

[0044] The revolution means 2 revolves the barrel tank 1 in the horizontal direction, and specifically, is composed of the above-mentioned rotating table 8 and the revolution drive unit 9 as its main parts, and a revolution drive motor is used as the above-mentioned revolution drive unit 9. is.

[0045] The rotary table 8 is disk-shaped and is attached horizontally to a vertical main rotary shaft 10, and the main rotary shaft 10 is directly connected to the revolution drive motor 9.

[0046] In the illustrated embodiment, a headstock 12 is provided at the center of a base frame 11 of the device case 5, and the rotating spindle 10 is supported by the headstock 12 so as to be rotatable in a vertical state via a bearing (not shown). The rotating table 8 is attached to the upper end of the rotating spindle 10 in a horizontal state by a fixing bracket 14.

[0047] Furthermore, the revolution drive motor 9 is attached horizontally to the headstock 12 on which the lower part of the rotating spindle 10 is journalled, and although not specifically shown, the lower part of the rotating spindle 10 is directly gear-driven and connected to the output shaft of the revolution drive motor 9. A geared motor incorporating a reduction gear mechanism is used as the revolution drive motor 9, and this revolution drive motor 9 is electrically connected to the control unit 4 via a motor drive unit 40 (FIG. 6).

[0048] Then, by the rotational drive motor 9, the rotary table 8 is rotated together with the rotating main shaft 10 in the horizontal direction (direction of arrow A) at a predetermined rotational speed, whereby the barrel tanks 1, 1, ... on the rotary table 8 are revolved horizontally around the axis of the rotating main shaft 10, i.e., the revolution axis X0, at a predetermined speed.

[0049] Four rotating support shafts 15, 15, ... are arranged at equal intervals in the circumferential direction at the outer periphery of the rotating table 8 in accordance with the number of barrel tanks 1 to be arranged. Each rotating support shaft 15 is rotatably supported by a bearing (not shown) in a vertical state, i.e., in a state parallel to the main rotating shaft 10. A barrel tank holder 16 for removably housing and supporting the barrel tanks 1 is attached and fixed in an inclined state to an upper end 15a of each rotating support shaft 15.

[0050] Specifically, the barrel tank receiver 16 has a bottom portion fixed to the upper end portion 15a of the rotation support shaft 15 and an open top portion so as to receive and hold the barrel tank 1 from above.

[0051] The barrel tank receiver 16 is attached to the rotating support shaft 15 with its axis X inclined at a predetermined angle α with respect to the axis X1 of the rotating support shaft 15, i.e., the axis (revolution axis) X0 of the rotating main shaft 10. When the barrel tank 1 is accommodated in the barrel tank receiver 16, the barrel tank 1 is also set so that its axis coincides with the axis X of the barrel tank receiver 16, i.e., is coaxial with the axis of the barrel tank receiver 16, and is inclined at a predetermined angle α with respect to the axis of the rotating main shaft 10, i.e., the revolution axis X0. Reference numeral 17 denotes a clamp for fixing the barrel tank 1 to the barrel tank receiver 16.

[0052] The inclination angle of the axis X of the barrel tank 1, i.e., the inclination angle α with respect to the vertical revolution axis X0, is specifically set to 10 degrees to 30 degrees, desirably 12 degrees to 20 degrees, and in the illustrated embodiment, the inclination angle α is set to 15 degrees.

[0053] The inclination angle α is set in this manner because, if the inclination angle α is less than 10 degrees or more than 30 degrees, the cooperation between the inner inclined surface of the barrel tank 1 and the centrifugal force generated by the revolution of the barrel tank 1, which will be described later, cannot be reliably obtained. Moreover, if the inclination angle α is greater than 30 degrees, the contents W, G, ... stored in the barrel tank 1 will spill out when the barrel tank 1 is attached to the barrel tank receiver 16, which is a structural problem in the wet barrel polishing apparatus.

[0054] The rotation means 3 rotates the barrel tank 1 in the horizontal direction, and is configured to rotate the barrel tank 1 at a slow rotation speed that is significantly slower than the rotation speed of the turntable 8, i.e., the revolution speed of the barrel tank 1.

[0055] In addition, the rotation means 3 and the revolving means 2 have a drive train independent of each other, so that the rotation speed of the barrel tank 1 can be freely adjusted and set to any speed independently of the revolving speed.

[0056] The specific configuration of the rotation means 3 includes the rotation support shaft 15 that is rotatably supported on the rotating table 8 and driven to rotate at a predetermined rotation speed, and a rotation drive unit 20 that drives the rotation support shaft 15 to rotate.

[0057] As described above, the rotating support shaft 15 is rotatably supported on the rotating table 8 in a vertical state parallel to the rotating main shaft 10, and the barrel tank receiver 16 is attached and fixed to the upper end portion 15a thereof in an inclined state at a predetermined inclination angle α.

[0058] The rotation drive unit 20 drives the rotation support shaft 15 to rotate, and specifically comprises a rotation drive motor 21 and a belt transmission mechanism 22 that transmits the rotational driving force of the rotation drive motor 21 to the rotation support shaft 15.

[0059] A geared motor incorporating a reduction gear mechanism is used as the rotation drive motor 21, which is horizontally mounted on the base frame 11, and the output shaft 21a of this rotation drive motor 21 is drivingly connected to the belt transmission mechanism 22. This rotation drive motor 21 is electrically connected to the control unit 4 via a motor drive unit 41 (FIG. 6).

[0060] The belt transmission mechanism 22 is composed of a first transmission mechanism 23 consisting of a drive gear (timing pulley) 23a attached to the output shaft 21a of the rotation drive motor 21, a driven gear (timing pulley) 23b supported on the rotating main shaft 10 so as to be freely rotatable, and a toothed belt (timing belt) 23c that drivingly connects these two gears 23a, 23b, and a second transmission mechanism 24 consisting of a rotation gear (timing pulley) 24a attached concentrically and integrally to the rotating support shaft 15, a main shaft gear (timing pulley) 24b supported on the rotating main shaft 10 so as to be freely rotatable, and a toothed belt (timing belt) 24c that drivingly connects these two gears 24a, 24b, and the driven gear 23b and the main shaft gear 24b are connected coaxially and integrally.

[0061] In the first transmission mechanism 23, if structurally possible in terms of arrangement space, etc., the drive gear 23a and the driven gear 23b may be directly drive-connected to each other by omitting the toothed belt 23c.

[0062] In the illustrated embodiment, four of the rotation support shafts 15 are provided at equal intervals in the circumferential direction at the outer periphery of the turntable 8 in correspondence with the number of barrel tanks 1, i.e., four barrel tanks 1, 1, ..., and therefore a second transmission mechanism 24 is provided for each pair of adjacent two of the rotation support shafts 15, 15, so that a total of two pairs of second transmission mechanisms 24, 24 are provided.

[0063] Specifically, as shown in FIG. 4, each toothed belt 24c of the two sets of second transmission mechanisms 24, 24 is wound around rotation gears 24a, 24a attached to two adjacent rotating support shafts 15, 15, respectively, and a main shaft gear 24b supported on the rotating main shaft 10 so as to be freely rotatable, and a tension pulley 24d is provided for maintaining the tension of the toothed belt 24c at a predetermined value.

[0064] By employing two sets of second transmission mechanisms 24, 24 in this manner, two main shaft gears 24b, 24b are provided on one rotating main shaft 10. To prevent the two main shaft gears 24b, 24b and further the second transmission mechanisms 24, 24 from interfering with each other, as shown in Figures 2 and 5, the two main shaft gears 24b, 24b are supported on the rotating main shaft 10 with an axial shift, and the two second transmission mechanisms 24, 24 are thereby arranged in two layers, one above the other.

[0065] In the illustrated embodiment, a single main shaft gear 24e is used as the main shaft gears 24b, 24b in the two sets of second transmission mechanisms 24, 24, to form a main shaft gear shared structure, and this main shaft gear 24e is drivingly connected to the rotation gears 24a, 24a of the adjacent rotation support shafts 15, 15 by toothed belts 24c, 24c, respectively, as shown in Figures 2, 4 and 5.

[0066] Furthermore, the driven gear 23b of the first transmission mechanism 23 and the main shaft gear 24e (24b, 24b) of the second transmission mechanism 24 are integrally formed as a single component and are composed of a single gear, thereby simplifying the assembly structure.

[0067] Then, by the rotational drive of the rotation drive motor 21, the four barrel tanks 1, 1, ... arranged and supported on the rotating table 8 are rotated at a predetermined rotational speed via the belt transmission mechanism 22 (first transmission mechanism 23, second transmission mechanism 24).

[0068] In this case, the rotation speed of the barrel tanks 1, 1, ... is set to a slow speed that is significantly slower than the revolution speed about the revolution axis X0. In addition, as described above, since the rotation means 3 and the revolution means 2 are formed as a mutually independent drive train, the speed ratio of this rotation speed to the above-mentioned revolution speed can be variably adjusted by freely adjusting and setting the rotation speed of the barrel tanks 1 to an arbitrary speed independently of the above-mentioned revolution speed.

[0069] That is, optimal operating conditions are set in a centrifugal barrel type barrel polishing machine that performs planetary motion by independently controlling and setting the rotation speed (number of rotations) of the revolution drive motor 9 of the revolution means 2 and the rotation drive motor 21 of the rotation means 3. In this embodiment, as a basic operation, the optimal operating conditions for planetary motion are set by arbitrarily controlling and setting the rotation speed of the rotation drive motor 21 relative to the basic rotation speed of the revolution drive motor 9 of the basic drive system.

[0070] The above-mentioned optimal operating conditions include (i) the planetary motion conditions that are optimal for each of the workpieces W to be barrel polished, which are made of a wide variety of materials ranging from metallic to non-metallic materials and which also have a variety of shapes and dimensions, and (ii) the planetary motion conditions that are optimal for the user who actually performs the barrel polishing, after taking into consideration the finishing accuracy and finishing speed of the workpiece W, and the above-mentioned planetary motion conditions can be freely and arbitrarily set for each workpiece W to be polished or for each user.

[0071] In this case, when setting the actual motion conditions, the user, for example, actually performs barrel polishing on each of the workpieces W to be barrel polished based on the planetary motion motion conditions (basic setting conditions) that have been set as a result of various test and research operations previously conducted by the manufacturer of the barrel polishing apparatus, and compares and determines the finishing accuracy, finishing speed, etc. of the target workpieces W that the user desires.

[0072] In the barrel polishing apparatus of this embodiment, the rotation speeds of the revolution drive motor 9 of the revolution means 2 and the rotation drive motor 21 of the rotation means 3 are controlled by the control unit 4.

[0073] The control unit 4 automatically controls the revolving means 2 and the rotating means 3 in cooperation with each other, and specifically, is composed of a microcomputer including a CPU, ROM, RAM, and I / O ports.

[0074] This control unit 4 has built-in basic processing programs for executing barrel polishing processing, and as shown in FIG. 6, the control unit 4 is connected to a motor drive unit 40 that drives and controls the revolution drive motor 9 of the revolution means 2, and a motor drive unit 41 that drives and controls the rotation drive motor 21 of the rotation means 3.

[0075] Into the control unit 4, various information required for driving the revolution drive motor 9 of the revolution means 2 and the rotation drive motor 21 of the rotation means 3, such as the rotation speed of the turntable 8 (the revolution speed of the barrel tank 1), the rotation speed of the barrel tank 1, operation time, timing for changing the speed, or processing time of the polishing process, is input as basic control data in advance or appropriately selectively set by an operation unit of an operation panel 50 (see Figures 1 and 2) provided in the apparatus case 5, and the revolution drive motor 9 and rotation drive motor 21 are controlled in accordance with this data.

[0076] As described above, the control unit 4 adjusts and sets the rotation speed of the barrel tank 1 independently of the revolution speed, thereby variably adjusting the speed ratio of the rotation speed of the barrel tank 1 to the revolution speed to an arbitrary set value, which is a characteristic configuration of the barrel polishing apparatus of this embodiment, and controls the revolution drive motor 9 of the revolution means 2 and the rotation drive motor 21 of the rotation means 3.

[0077] For this purpose, a setting unit 45 for setting various operating conditions and a display unit 46 for performing various displays are connected to the control unit 4, and the setting unit 45 includes a speed setting unit 47 as a speed setting means for setting the revolution speed and the rotation speed of the barrel tank 1, and a speed ratio setting unit 48 as a speed ratio setting means for setting the speed ratio between the revolution speed and the rotation speed of the barrel tank 1.

[0078] The operation panel 50, although not specifically shown in the figure, is provided with a start and stop switch, and is in the form of a touch panel display device that combines the functions of both the setting unit 45 and the display unit 46. This touch panel display device 50 is configured so that a display unit 51 consisting of an LCD screen can switch between displaying the setting unit 45 and the display unit 46 by touch operation with a finger.

[0079] The speed setting unit 47 is for setting the revolution speed and the rotation speed of the barrel tank 1. Specifically, the speed setting unit 47 can individually control and set the rotation speed of the revolution drive motor 9 of the revolution means 2 and the rotation speed of the rotation drive motor 21 of the rotation means 3. This allows the revolution speed and the rotation speed of the barrel tank 1 to be set to any value. Furthermore, by freely setting a combination of the revolution speed and the rotation speed, the speed ratio of the rotation speed of the barrel tank 1 to the revolution speed can be steplessly variably adjusted to any set value.

[0080] In the illustrated embodiment, the basic setting operation is to first set the basic rotational speed of the revolution drive motor 9 of the basic drive system, and then set the rotational speed of the rotation drive motor 21 to an arbitrary value to set optimal operating conditions for the planetary motion. However, it is of course possible to set the rotational speed of both drive motors 9, 21 independently and arbitrarily.

[0081] In this embodiment, it is preferable that the revolution speed of the barrel tank 1 is set to 100 to 300 revolutions per minute, and the rotation speed is set to -1 / 20 to 1 / 20 of the revolution speed.

[0082] The revolution speed and rotation speed of the barrel tank 1 were set as a result of various repeated test researches, and by setting the revolution speed within this range, the planetary motion conditions suitable for each workpiece W to be barrel polished can be obtained.

[0083] Specifically, the workpieces W to be subjected to barrel polishing are made of a wide variety of materials ranging from metallic to non-metallic materials, and also come in a variety of shapes and dimensions. The abrasives G, G, ... that are charged into the barrel tank 1 together with the workpieces W, W, ... are often ceramic-based, but there are a wide variety of types depending on the shape, size, etc. It has been found that by setting the revolution speed of the barrel tank 1 to 100 to 300 revolutions per minute, it is possible to obtain planetary motion conditions suitable for each individual workpiece W to be polished.

[0084] That is, the revolution speed of the barrel tank 1 is set to 100 to 300 rpm in consideration of the effective application of centrifugal force, and it has been found that by setting the revolution speed within this range, centrifugal force is effectively applied to the contents W, G, ... filled in the barrel tank 1.

[0085] In this case, the rotation speed of the barrel tank 1 is set to −1 / 20 to 1 / 20 of the above-mentioned revolution speed, that is, 5 to 15 revolutions per minute, and the reason for setting it within this range is as follows.

[0086] In other words, if the rotation speed of the barrel tank 1 is greater than 1 / 20 of the revolution speed, the effect of the centrifugal force generated on the abrasives G, G, ... and workpieces W, W, ... due to the revolution of the barrel tank 1 is reduced or offset by the effect of the centrifugal force generated on these abrasives G, G, ... and workpieces W, W, ... due to the rotation of the barrel tank 1, and therefore the abrasives G, G, ... and workpieces W, W, ... within the barrel tank 1 are not sufficiently moved, and active movement of the abrasives G, G, ... and workpieces W, W, ... within the barrel tank 1 is not obtained.

[0087] On the other hand, if the rotation speed of the barrel tank 1 is 0 to 1 / 20 of the revolution speed, the centrifugal force generated in the abrasives G, G, ... and the workpieces W, W, ... by the revolution of the barrel tank 1 will have a full effect, and the movement of the abrasives G, G, ... and the workpieces W, W, ... will not be limited to simple horizontal movement, but will also induce vertical movement due to the cooperative action with the inclined inner surface of the barrel tank 1 due to the inclination angle α (three-dimensional relative motion).

[0088] It has also been found that, compared to a case in which the barrel tank 1 only revolves and does not rotate (in other words, when the rotation speed is zero), rotating at an extremely slow rotation speed of less than 1 / 20 of the revolution speed, as described above, allows the centrifugal force caused by the revolution of the barrel tank 1 to act effectively on the abrasives G, G, ... and workpieces W, W, ... present in the corners of the barrel tank 1, allowing all of the abrasives G, G, ... and workpieces W, W, ... within the barrel tank 1 to perform smooth three-dimensional relative movement.

[0089] The speed ratio setting unit 48 is for setting the speed ratio between the revolution speed and the rotation speed of the barrel tank 1. The speed setting unit 47 controls and sets the revolution speed and the rotation speed of the barrel tank 1 individually, thereby indirectly adjusting the speed ratio between the rotation speed and the revolution speed of the barrel tank 1. In contrast, the speed ratio setting unit 48 can directly adjust and set the speed ratio between the rotation speed and the revolution speed of the barrel tank 1.

[0090] In this embodiment, as a result of various repeated test and research, a plurality of speed ratios between the revolution speed and the rotation speed of the barrel tank 1 are preset within a range of -1 / 20 to 1 / 20, and a user can select and set an arbitrary speed ratio from the plurality of preset speed ratios. In addition, the speed setting unit 47 or the speed ratio setting unit 48 can arbitrarily and steplessly set the speed ratio between the revolution speed and the rotation speed of the barrel tank 1.

[0091] With the control unit 4 configured as described above, when the display unit 51 of the touch panel display device 50 displays the screen of the setting unit 45 as a liquid crystal display, the user can input and set any control data from the speed setting unit 47 or the speed ratio setting unit 48 by touching the operation panel of the setting unit 45 with his / her fingers, while when the screen of the display unit 46 is displayed as a liquid crystal display, the operating conditions of the device (necessary information such as the rotation speed of the turntable 8 (the revolution speed of the barrel tank 1), the rotation speed of the barrel tank 1, the operating time of the device, or the elapsed operating time) are displayed as a liquid crystal display.

[0092] The control unit 4 also incorporates processing programs for executing a plurality of barrel polishing processes, taking into consideration various processing conditions, and these processing programs are selected by touching and specifying the desired program number on the operation panel of the setting unit 45 of the touch panel display device 50.

[0093] In the barrel polishing apparatus constructed as described above, when the barrel tanks 1 filled with a large number of workpieces W, W, ... and abrasives G, G, ... are respectively accommodated and held in the barrel tank receivers 16, 16, ... rotatably mounted on the rotary table 8, by operating the start switch, the control unit 4 automatically controls the revolution drive motor 9 of the revolution means 2 and the rotation drive motor 21 of the rotation means 3 in cooperation with each other, so that the barrel tanks 1, 1 revolve horizontally around the revolution axis X0 at a predetermined revolution speed, and rotate or stop around the vertical axis X1 at a slow predetermined rotation speed that is significantly slower than the revolution speed, while the workpieces W, W, ... in the barrel tank 1 are polished by rubbing against the abrasives G, G, ....

[0094] That is, by driving the revolution drive motor 9 of the revolution means 2 by the control unit 4, the rotary table 8 rotates horizontally (in the direction of arrow A), and the rotation drive motor 21 of the rotation means 3 is linked to this, so that the barrel tank 1 revolves horizontally around the revolution axis X0 of the vertical rotation main shaft 10 at the above-mentioned revolution speed, and 1 rotates or is stopped horizontally around the axis X1 of the vertical rotation support shaft 15, and centrifugal force is applied to the workpieces W, W, ... and the abrasives G, G, ... in the barrel tank 1, and the workpieces W, W, ... are polished by the friction between the workpieces W, W, ... and the abrasives G, G, ....

[0095] In this case, the barrel tanks 1, 1, ... are attached to the rotation support shaft 15 with their axes X inclined relative to the revolution axis X0 of the rotation main shaft 10, i.e., the axis X1 of the rotation support shaft 15, and rotate or stop at a rotation speed that is much slower than the revolution speed.

[0096] As a result, the behavior of the workpieces W, W, ... and the abrasives G, G, ... filled and stored in each barrel tank 1, particularly the behavior of the abrasives G, G, ..., is such that they bounce randomly off the inclined inner surface of the barrel tank 1 and move three-dimensionally, as shown in Figure 7(a), and the abrasives G, G, ... flow toward the center, as if they are being kneaded deeper and deeper in, as shown by the arrows.

[0097] In other words, the barrel tank 1 revolves while slowly oscillating as shown in Figure 7(b) → Figure 7(c) → Figure 7(b), so that inside the barrel tank 1, the abrasives G, G, ... and the workpieces W, W, ... move randomly in a three-dimensional manner and are kneaded into the center of the barrel tank 1, so that the workpieces W, W, ... are always present among the abrasives G, G, ...

[0098] This type of behavior occurs because the centrifugal force generated by the revolution of the barrel tank 1 does not simply cause horizontal movement of the abrasives G, G, ... and the workpieces W, W, ..., but also induces vertical movement due to the cooperative action with the inclined inner surface of the barrel tank 1 caused by the inclination of the barrel tank 1. As a result, the difference in the weight of the abrasives G, G, ... and the workpieces W, W, ... also come into play, and they flow vertically and horizontally within the barrel tank 1 without separating, acting as one unit (three-dimensional relative motion).

[0099] In this case, the speed ratio of the rotation speed of the barrel tank 1 to the above-mentioned revolution speed is variably adjustable by freely adjusting and setting the rotation speed of the barrel tank 1 to any speed independently of the revolution speed, and the user sets the motion conditions of the planetary motion of the barrel tank 1 to optimal values ​​by taking into consideration the constituent material and shape dimensions of the workpiece W to be barrel polished, or the finishing accuracy and finishing speed of the workpiece W.

[0100] Specifically, (a) the speed setting unit 47 of the setting unit 45 controls and sets the revolution speed and the rotation speed of the barrel tank 1 individually, thereby indirectly adjusting the speed ratio of the rotation speed to the revolution speed of the barrel tank 1, or (b) the speed ratio setting unit 48 of the setting unit 45 directly sets the speed ratio of the revolution speed and the rotation speed of the barrel tank 1.

[0101] As described above, in the barrel polishing machine of this embodiment, the barrel tank 1 is provided with its axis X inclined with respect to the vertical revolution axis X0 (=X1), and the barrel tank 1 revolves horizontally around the revolution axis X0 at a predetermined speed, and rotates or stops around the vertical axis X1 at a predetermined slow rotation speed that is significantly slower than the revolution speed. Since the speed ratio of the rotation speed to the revolution speed is variably adjustable, in the centrifugal barrel type barrel polishing machine that performs planetary motion, the motion conditions of the planetary motion can be arbitrarily set and adjusted, and a highly versatile barrel polishing machine that can be used to meet the workpiece W to be processed and the needs of the user can be provided.

[0102] That is, in the centrifugal barrel type barrel polishing apparatus with planetary motion, the barrel tank 1 revolves horizontally around the rotating main shaft 10 at a predetermined speed, and at the same time, oscillates and rotates at an inclined state relative to the rotating main shaft 10 at a slow predetermined rotation speed that is significantly slower than the revolution speed. This realizes a "three-dimensional relative motion between the workpiece W and the abrasive G" that could not be achieved in the general centrifugal barrel type, and significantly reduces or eliminates the three conventional problems (i) to (iii) in the polishing process of the centrifugal barrel type. In addition, in this embodiment, the speed ratio of the rotation speed of the barrel tank to the revolution speed is variably adjustable, so that the planetary motion conditions optimal for the material and shape dimensions of each workpiece W to be barrel polished can be set for each workpiece W to be barrel polished, and the user who actually performs the barrel polishing can also arbitrarily set the planetary motion conditions optimal for the user's desire by taking into consideration the finishing accuracy and the finishing speed.

[0103] EMBODIMENT 2 This embodiment is shown in Figs. 8 to 10, and is a modification of the configuration of the rotation drive unit 20 in the first embodiment.

[0104] That is, in the barrel polishing apparatus of this embodiment, the rotation drive unit 20 specifically comprises a rotation drive motor 21 and a gear transmission mechanism 25 that transmits the rotational drive force of this rotation drive motor 21 to the rotation support shaft 15.

[0105] The gear mechanism 25 is made up of a first transmission mechanism 23 consisting of a drive gear 23a attached to the output shaft 21a of the rotation drive motor 21, a driven gear 23b supported on the rotation main shaft 10 so as to be freely rotatable, and a toothed belt 23c that drivingly connects these two gears 23a, 23b, and a second transmission mechanism 26 consisting of a rotation gear 26a attached concentrically and integrally to the rotation support shaft 15, a main shaft gear 26b supported on the rotation main shaft 10 so as to be freely rotatable, and an intermediate gear 26c that drivingly connects these two gears 26a, 26b, and the driven gear 23b and the main shaft gear 26b are connected coaxially and integrally.

[0106] The intermediate gear 26c is interposed in a meshed state between the main shaft gear 26b and the rotation gear 26a, and specifically, as shown in Figures 8 and 10, it is rotatably supported via a bearing (not shown) on a support shaft 27 that is supported and fixed to the turntable 8 below the turntable 8, and is meshed with the main shaft gear 26b and the rotation gear 26a, respectively.

[0107] As in the first embodiment, in the first transmission mechanism 23, if structurally possible, such as in terms of arrangement space, the drive gear 23a and the driven gear 23b can be directly driven and connected by omitting the toothed belt 23c.

[0108] 9, in the illustrated embodiment, four of the rotation support shafts 15 are arranged at equal intervals in the circumferential direction on the outer periphery of the turntable 8 in correspondence with the number of barrel tanks 1, i.e., four barrel tanks 1, 1, ..., and a single main shaft gear 26b is drivingly connected to the rotation gears 26a, 26a, ... attached to the four rotation support shafts 15, 15, ..., forming a main shaft gear shared structure. Specifically, the main shaft gear 26b is drivingly connected to the four rotation gears 26a, 26a, ... via intermediate gears 26c, 26c, ..., respectively.

[0109] Furthermore, the driven gear 23b of the first transmission mechanism 23 and the main shaft gear 26b of the second transmission mechanism 26 may be integrally formed as a single component and composed of a single gear, thereby simplifying the assembly structure.

[0110] Then, by the rotational drive of the rotation drive motor 21, the four barrel tanks 1, 1, ... arranged and supported on the rotating table 8 are rotated at a predetermined rotational speed via the gear transmission mechanism 25 (first transmission mechanism 23, second transmission mechanism 26). The other configurations and operations are the same as those of the first embodiment.

[0111] It should be noted that the above-mentioned embodiments 1 and 2 are merely preferred embodiments of the present invention, and the present invention is not limited to these, and various design modifications are possible within the scope thereof.

[0112] For example, in the above-described first and second embodiments, the four barrel tanks 1, 1, ... are arranged at equal intervals in the circumferential direction on the turntable 8, but the number of barrel tanks 1, 1, ... can be appropriately increased or decreased depending on the purpose. [Explanation of symbols]

[0113] W work G Abrasives (media) X0 revolution axis X Axis of barrel vessel holder (barrel vessel) α Incline angle of barrel tank holder (barrel tank) 1 barrel tank 2. Means of revolution 3. Means of rotation 4. Control Unit 8 Rotating Table 9 Revolution drive motor (revolution drive section) 10 Rotating Spindle 15 Rotating shaft 16 Barrel tank holder 20 Rotation drive unit 21 Drive motor for self-rotation 21a Output shaft of the rotation drive motor 22 Belt transmission mechanism 23 First transmission mechanism 23a Drive gear 23b Driven gear 23c Toothed belt 24 Second transmission mechanism 24a Rotating gears 24b Main shaft gear 24c toothed belt 24d tension pulley 24e Main shaft gear 25 Gear transmission mechanism 26 Second transmission mechanism 26a Rotating gears 26b Main shaft gear 26c intermediate gear 45 Setting section 46 Display section 47 Speed ​​setting section 48 Speed ​​ratio setting section 50 Control panel 51 Display section

Claims

1. A barrel polishing apparatus in which a barrel tank filled with workpieces and abrasives revolves in a horizontal direction, thereby applying centrifugal force to the workpieces and the abrasives in the barrel tank, and polishing the workpieces by rubbing against each other, The apparatus comprises a revolving means for revolving the barrel tank in a horizontal direction, a rotation means for rotating the barrel tank about its axis in the horizontal direction, and a control means for automatically controlling the revolving means and the rotation means in cooperation with each other, the revolution means includes a rotary table that is attached horizontally to a vertical main rotation shaft and is rotationally driven at a predetermined revolution speed, and a revolution drive unit that rotationally drives the main rotation shaft; The rotating means includes a rotation support shaft that is rotatably supported on the rotary table in a vertical state parallel to the main rotation shaft and is driven to rotate at a predetermined rotation speed, and a rotation drive unit that drives the rotation support shaft, and the barrel tank is attached to the rotation support shaft in a state inclined with respect to the main rotation shaft, the revolution drive unit is a revolution drive motor directly connected to the main rotation shaft, the rotation drive unit includes a rotation drive motor and a belt transmission mechanism that transmits the rotational drive force of the rotation drive motor to the rotation support shaft; the belt transmission mechanism is composed of a first transmission mechanism consisting of a drive gear attached to the output shaft of the rotation drive motor, a driven gear supported on the main rotation shaft so as to be freely rotatable, and a toothed belt which drive-connects these two gears, and a second transmission mechanism consisting of a rotation gear attached concentrically and integrally to the main rotation shaft, a main shaft gear supported on the main rotation shaft so as to be freely rotatable, and a toothed belt which drive-connects these two gears, the driven gear of the first transmission mechanism and the main shaft gear of the second transmission mechanism are coaxially and integrally coupled to each other, the control means is configured to control the revolution drive motor of the revolution means and the rotation drive motor of the rotation means so that the revolution speed and the rotation speed of the barrel tanks are set to an arbitrary speed ratio by independently adjusting and setting the revolution speed and the rotation speed of the barrel tanks, As a result, the barrel tank is horizontally revolved around the axis of the main rotating shaft at a predetermined revolution speed, and rotates around the axis of the support rotating shaft at a slow predetermined rotation speed that is significantly slower than the revolution speed, or stops. The rotation speed is set to -1 / 20 to 1 / 20 of the revolution speed, and the speed ratio of the rotation speed to the revolution speed is variably adjustable. A barrel polishing apparatus comprising:

2. A barrel tank receiver is attached to the rotation support shaft supported on the rotary table with its axis inclined at a predetermined angle with respect to the rotation main shaft, The barrel tank is removably received and held coaxially in the barrel tank receiver from above.

2. The barrel polishing apparatus according to claim 1 .

3. The driven gear and the main shaft gear are configured as a single gear.

2. The barrel polishing apparatus according to claim 1 .

4. A plurality of the rotation support shafts are arranged at equal intervals in the circumferential direction at the outer periphery of the rotary table, and a single main shaft gear is drivably connected to the rotation gears attached to the plurality of rotation support shafts, forming a main shaft gear shared structure.

2. The barrel polishing apparatus according to claim 1 .

5. A barrel polishing apparatus in which a barrel tank filled with workpieces and abrasives revolves in a horizontal direction, thereby applying centrifugal force to the workpieces and the abrasives in the barrel tank, and polishing the workpieces by rubbing against each other, The apparatus comprises a revolving means for revolving the barrel tank in a horizontal direction, a rotation means for rotating the barrel tank about its axis in the horizontal direction, and a control means for automatically controlling the revolving means and the rotation means in cooperation with each other, the revolution means includes a rotary table that is attached horizontally to a vertical main rotation shaft and is rotationally driven at a predetermined revolution speed, and a revolution drive unit that rotationally drives the main rotation shaft; The rotating means includes a rotation support shaft that is rotatably supported on the rotary table in a vertical state parallel to the main rotation shaft and is driven to rotate at a predetermined rotation speed, and a rotation drive unit that drives the rotation support shaft, and the barrel tank is attached to the rotation support shaft in a state inclined with respect to the main rotation shaft, the revolution drive unit is a revolution drive motor directly connected to the main rotation shaft, the rotation drive unit includes a rotation drive motor and a gear mechanism that transmits the rotation drive force of the rotation drive motor to the rotation support shaft, The gear mechanism is composed of a first transmission mechanism consisting of a drive gear attached to the output shaft of a rotation drive motor, a driven gear supported on the main rotation shaft so as to be freely rotatable, and a toothed belt which drive-connects these two gears, and a second transmission mechanism consisting of a rotation gear attached concentrically and integrally to the main rotation shaft, a main shaft gear supported on the main rotation shaft so as to be freely rotatable, and an intermediate gear which drive-connects these two gears, the driven gear of the first transmission mechanism and the main shaft gear of the second transmission mechanism are coaxially and integrally coupled to each other, the control means is configured to control the revolution drive motor of the revolution means and the rotation drive motor of the rotation means so that the revolution speed and the rotation speed of the barrel tanks are set to an arbitrary speed ratio by independently adjusting and setting the revolution speed and the rotation speed of the barrel tanks, As a result, the barrel tank is horizontally revolved around the axis of the main rotating shaft at a predetermined revolution speed, and rotates around the axis of the support rotating shaft at a slow predetermined rotation speed that is significantly slower than the revolution speed, or stops. The rotation speed is set to -1 / 20 to 1 / 20 of the revolution speed, and the speed ratio of the rotation speed to the revolution speed is variably adjustable. A barrel polishing apparatus comprising:

6. The driven gear and the main shaft gear are configured as a single gear.

6. The barrel polishing apparatus according to claim 5.

7. A plurality of the rotation support shafts are arranged at equal intervals in the circumferential direction at the outer periphery of the rotary table, and a single main shaft gear is drivably connected to the rotation gears attached to the plurality of rotation support shafts, forming a main shaft gear shared structure.

6. The barrel polishing apparatus according to claim 5.

8. A speed setting means is provided for setting the revolution speed and the rotation speed of the barrel tank.

6. The barrel polishing apparatus according to claim 1, wherein the polishing member is a rotatable member.

9. 6. The barrel polishing machine according to claim 1, further comprising a speed ratio setting means for setting a speed ratio between the revolution speed and the rotation speed of the barrel tank.

10. The revolution speed of the barrel tank is set to 100 to 300 revolutions per minute.

6. The barrel polishing apparatus according to claim 1, wherein the polishing member is a rotatable member.

11. The inclination angle of the axis of the barrel tank is set to 10 degrees to 30 degrees.

6. The barrel polishing apparatus according to claim 1, wherein the polishing member is a rotatable member.

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