JP6083778B1 - Vibration sand remover - Google Patents

Abstract

A vibratory sand removal apparatus capable of reliably removing sand and the like from a workpiece is provided. A vibrating sand removing device 10 for dropping sand adhered to a workpiece W by vibration, wherein the vibrating table 12, a vibration motor 16 for exciting the vibrating table 12, and a workpiece W are gripped. The vibration motor 16 includes a work rotation gripping part 18 that rotates the work around the axis of the shaft part 24, and a rotation drive source 28 for rotating the work W by the work rotation gripping part 18. Are arranged on the vibration table 12 such that the center of gravity position of and the gravity center position of the vibration table 12 are substantially the same height or close to each other. [Selection] Figure 4

Description

  The present invention is for removing sand, dust, and the like adhering to a workpiece by vibration, particularly core sand and dust adhering to a hollow portion of the workpiece, such as automobile parts, by casting. The present invention relates to a vibration sand removing device for a workpiece and an automobile part from which sand or the like has been removed by the vibration sand removing device.

  Many machine parts such as automobile parts are molded by casting. A large amount of sand adheres to the cast product (work), and it is necessary to remove the adhered sand.

  As an example of a conventional workpiece sand removal device, a workpiece is placed on a vibration base plate, and the sand is attached to the workpiece by the vibration of the vibration base plate. The workpiece is clamped with a clamp lever. In addition, the clamp lever is operated with an air spring to hold the work firmly, whereby the heat of the work is conducted to the air spring through the clamp lever, and the air spring is protected from the influence of heat, and A device that reduces the size of the equipment has been proposed (see Patent Document 1 below).

  As a result, sand can be removed from the work, and the heat of the work is transmitted to the air spring via the clamp lever. Therefore, the air spring is not affected by the heat, and the air spring is more than the conventional cylinder. Since it is small, the equipment can be miniaturized.

  In addition, as described in Patent Documents 2 to 5, many vibratory sand removal devices are conventionally known.

JP 2008-149367 A JP 2012-50990 A JP 2008-6481 A JP 2007-253188 A JP 2006-55905 A Japanese Patent Laid-Open No. 2004-237306

  By the way, in the conventional vibrating sand dropping device, the sand adhering to the hole formed in the workpiece could not be sufficiently removed. In other words, the vibration from the vibration motor was applied to the workpiece while the workpiece was fixed, and the workpiece was vibrated to remove sand and dust attached to the workpiece surface. Are crushed gradually by repeated collisions between the inner walls or sand by vibration, and become a size that is easily discharged to the outside of the hole.

  However, in a configuration in which the opening of the hole portion does not face the vertically lower side, sand or the like crushed by vibration remains in the hole portion and cannot be completely removed from the workpiece.

  In view of the above circumstances, an object of the present invention is to provide a vibrating sand dropping device that can reliably remove sand and the like from a workpiece.

A first aspect of the present invention is a vibrating sand removing apparatus for dropping sand adhered to a workpiece by vibration, the vibrating table, a vibration motor provided on the vibrating table and exciting the vibrating table, and the vibration A work rotation gripping part that is provided on a table, has a shaft part, and rotates the work around an axis of the shaft part in a state of gripping the work; and provided on the vibration table, the work rotation gripping part anda rotation drive source for rotating the workpiece, the vibration motor, so that the center of gravity position and the center of gravity of the vibrating table of the vibration motor are substantially the same height, are arranged on the vibration table It is characterized by being.

A second invention is a vibrating sand removing device for dropping sand adhered to a workpiece by vibration, the vibrating table, a vibration motor provided on the vibrating table, for exciting the vibrating table, and the vibration A work rotation gripping part that is provided on a table, has a shaft part, and rotates the work around an axis of the shaft part in a state of gripping the work; and provided on the vibration table, the work rotation gripping part anda rotation drive source for rotating the workpiece, the vibration motor, so that the center position in the height direction of the center position and the shaking table in the height direction of the vibration motor are substantially the same height , characterized in that it is arranged on the vibrating table.

  According to the first invention, in a state where the vibration table is vibrated by the vibration motor, the work rotation gripping portion receives the driving force from the rotation drive source to grip the work and rotate in a predetermined direction. Let As a result, sand and dirt adhering to the surface of the workpiece are removed by vibration of the shaking table, and at the same time, the opening of the hole portion of the workpiece can be exposed vertically downward, so that it adheres particularly to the inside of the hole portion. The sand and dust that had been removed can be removed from the workpiece using the action of gravity.

In particular, the vibration motor to vibrate the vibrating table is in so that Do and the center of gravity position and center of gravity position and a substantially same height of the vibrating table of the vibration motor, since it is arranged on the vibrating table, the vibrating table Vibration Resonance with motor vibration can be suppressed. Thus, the shaking table does not greatly fluctuate, and the workpiece is effectively vibrated to improve the sand removal function of the workpiece, and at the same time, the occurrence of failure of the vibrating sand drop device and the decrease in durability can be suppressed.

According to the second invention, the vibration motor for exciting the vibration table includes a center position in the height direction (vertical height) of the vibration motor and a center in the height direction (vertical height) of the vibration table. position and is substantially so that Do the same height, since it is arranged on the vibrating table can be suppressed to resonant oscillation of the vibrating table and the vibration of the vibration motor. Thus, the shaking table does not greatly fluctuate, and the workpiece is effectively vibrated to improve the sand removal function of the workpiece, and at the same time, the occurrence of failure of the vibrating sand drop device and the decrease in durability can be suppressed.

  The automobile parts include parts for two-wheeled vehicles such as motorcycles (motorcycles), parts for three-wheeled vehicles, and the like in addition to parts for four-wheeled vehicles.

It is a perspective view of the state where the work was grasped with the vibration sand dropping device concerning this embodiment of the present invention. It is a top view of the state which hold | gripped the workpiece | work with the vibration sand dropping apparatus which concerns on this embodiment of this invention. It is a front view of the state which grasped the work of the vibration sand dropping device concerning this embodiment of the present invention. It is a side view of the state which grasped the work of the vibration sand dropping device concerning this embodiment of the present invention. It is a figure of the state which hold | gripped the workpiece | work with the workpiece | work rotation holding part of the vibration sand dropping apparatus which concerns on this embodiment of this invention. It is a perspective view of the workpiece | work rotation holding part of the vibration sand dropping apparatus which concerns on this embodiment of this invention.

  The vibration sand removing apparatus according to this embodiment of the present invention will be described with reference to the drawings. A part from which sand or the like is removed by the vibrating sand removal apparatus of the present embodiment is referred to as a workpiece.

  The workpiece is, for example, a casting formed by casting, and particularly an automobile part.

  In addition to automobile parts, automobile parts include motorcycle parts such as motorcycles (motorcycles), tricycle parts, and the like.

  As shown in FIGS. 1 to 4, the vibrating sand drop device 10 is provided with, for example, a plate-like vibrating table 12. Further, the vibration table 12 is formed with a through hole 14 serving as a large opening that penetrates in the thickness direction of the plane.

  A vibration motor 16 serving as a drive source for exciting the vibration table 12 is disposed in the through hole 14. For this reason, the vibration motor 16 is disposed so as to protrude from the upper surface side and the lower surface side of the vibration table 12. Vibration is applied to the vibration table 12 by the vibration motor 16, and the entire apparatus vibrates.

  As the vibration motor 16, for example, a high-performance vibration generator (vibrator) manufactured by Murakami Seisakusho Co., Ltd. and sold by Eurus Techno Co., Ltd. can be used.

  Since the detailed structure of the vibration motor 16 has been conventionally known, the description thereof is omitted.

  Here, the vibration motor 16 that vibrates the vibration table 12 may be disposed on the vibration table 12 so that the position of the center of gravity of the vibration motor 16 and the position of the center of gravity of the vibration table 12 are substantially the same or close to each other. preferable.

  In other words, when the vibration table 12 is installed, it is most preferable that the position of the center of gravity of the vibration motor 16 and the position of the center of gravity of the vibration table 12 are on the same horizontal line, or mutually so that they are on the same horizontal line. May be close to

  Furthermore, the vibration motor 16 that vibrates the vibration table 12 is such that the center position in the height direction of the vibration motor 16 and the center position in the height direction of the vibration table 12 are approximately the same height or close to each other. 12 can also be said to be arranged.

  The vibration table 12 is provided with a workpiece rotation gripping portion 18 that grips the workpiece W and rotates it in a predetermined direction.

  As shown in FIGS. 5 and 6, the work rotation gripping portion 18 includes a jig 20 that grips the work W and an air spring 22 for adjusting the clamping force of the work W by the jig 20. The jig 20 includes a shaft portion 24 and a bearing mechanism 26 for allowing the workpiece W to rotate in a state where the workpiece W is sandwiched.

  In a state where the workpiece W is held between the jigs 20 with a predetermined force by the air spring 22, the shaft portion 24 is rotated about the axis by the bearing mechanism 26, whereby the workpiece W is rotated about the axis of the shaft portion 24.

  The vibration table 12 is provided with a rotation drive source 28 for rotating the workpiece W by the workpiece rotation gripping portion 18. As the rotation drive source 28, for example, a motor 30 is preferable.

  The motor 30 includes all existing motors that generate driving force, such as a DC motor, a stepping motor, an air motor, and a hydraulic motor.

  In particular, the vibration motor 32 is preferable as the motor 30. In FIG. 1 to FIG. 5, a vibration motor 32 is applied as the rotational drive source 28.

  In the configuration in which the vibration motor 32 is applied as the rotation drive source 28, it is assumed that the vibration motor 32 is used as a normal motor that only transmits the rotation drive force without vibrating.

  Specifically, for example, by removing a balance weight (weight) attached to the shaft of the original vibration motor 32 or manufacturing a vibration motor without a balance weight from the beginning, the motor does not vibrate. There is a need.

  As the vibration motor 32 for rotationally driving the workpiece W, the above-mentioned vendors can be used in the same manner as the vibration motor 16 for exciting the vibration table 12.

  Since the vibration motor 32 is used as the rotation drive source 28 for rotating the workpiece W, the vibration motor 32 has durability against vibrations. Therefore, even when the vibration motor 32 is installed on the vibrating table 12 that vibrates, failure due to vibration hardly occurs. There are benefits.

  Here, it is mechanically connected to the shaft portion 24 via a predetermined speed reduction mechanism 34 to a rotation drive source 28 for rotating the workpiece W by the workpiece rotation gripping portion 18. For this reason, the rotational driving force of the rotational drive source 28 is transmitted to the shaft portion 24 via the speed reduction mechanism 34, and the shaft portion circle rotates.

  As the speed reduction mechanism 34, for example, a pinion / rack mechanism and a gear train can be used.

  The vibration table 12 is elastically supported by a plurality of elastic support portions 36. An air spring 38 is used as an example of the elastic support portion 36.

  In the present embodiment, four elastic support portions 36 are provided, and the vibration table 12 is elastically supported by each elastic support portion 36 in a well-balanced manner.

  Next, the operation of the vibrating sand removal apparatus 10 according to the present embodiment will be described.

  As shown in FIGS. 1 to 6, the vibration motor 16 is driven in a state where the workpiece W is gripped by the workpiece rotation gripping portion 18 with a predetermined clamping force, and the rotational driving force is shafted via the speed reduction mechanism 34. Is transmitted to the unit 24. As a result, the workpiece W rotates around the axis of the shaft portion 24 in a state where the workpiece W is gripped by the workpiece rotation gripping portion 18.

  At the same time, the vibration motor 16 that vibrates the vibration table 12 is driven to vibrate the vibration table 12. At this time, the vibration motor 16 and the rotation drive source 28 themselves also vibrate, but the rotation drive source 28 is constituted by the vibration motor 32 and has durability against vibration, and therefore has a characteristic that it is difficult to be damaged by vibration.

  As a result, sand or the like adhering to the surface of the work W is dropped and removed from the work surface, and is attached to the hole when the opening of the hole formed in the work W faces vertically downward. The sand or the like falls and is removed from the workpiece W.

  Here, in the state where the vibration table 12 is vibrating, the sand adhered to the inside of the hole portion of the workpiece W receives vibration from the vibration table 12 and collides with each other or the inner wall of the hole portion. Repeat and gradually pulverize. In this collision process, finely crushed sand and the like are discharged from the inside of the hole portion of the workpiece W to the outside. Especially when the diameter of the hole portion is small, the inside of the hole portion It is difficult to discharge all the sand etc. For this reason, sand or the like may remain inside the hole portion of the workpiece W even after the vibrating sand drop device 10 vibrates.

  Therefore, by transmitting the rotational driving force of the rotational drive source 28 to the shaft portion 24 and rotating it, the workpiece can be rotated around the shaft portion 24 while the workpiece W is gripped while the vibration table 12 is vibrating. Realize such an environment. Thereby, when the opening of the hole portion of the workpiece W is directed vertically downward, sand or the like remaining inside the hole portion is discharged to the outside of the hole portion due to the action of gravity and centrifugal force. As a result, sand and the like can be reliably removed from the hole portion of the workpiece W.

  Here, the vibration motor 16 that vibrates the vibration table 12 is disposed on the vibration table 12 so that the position of the center of gravity of the vibration motor 16 and the position of the center of gravity of the vibration table 12 are substantially the same or close to each other.

  As a technical background, since the vibration motor 16 and the vibration table 12 are assembled separately, the vibration table 16 is vibrated by the vibration motor 16 to vibrate the entire apparatus. The vibration waveform (vibration frequency) at the motor 16 and the vibration waveform (vibration frequency) at the vibration table 12 exist independently. And both phases shift. In this state, when the entire apparatus vibrates, the peak of the vibration waveform at the vibration motor 16 and the peak of the vibration waveform at the vibration table 12 overlap each other, or the valley of the vibration waveform at the vibration motor 16 and the vibration table. The resonance phenomenon of the device occurs at the timing when the trough of the vibration waveform at 12 overlaps. At this time, the vibration of the entire device becomes too large, in other words, the entire device is too violent, which may cause a problem in durability of the device.

  On the other hand, at the timing when the peak of the vibration waveform at the vibration motor 16 and the valley of the vibration waveform at the vibration table 12 overlap, or the valley of the vibration waveform at the vibration motor 16 and the peak of the vibration waveform at the vibration table 12 overlap. The vibration of the entire device becomes too small. At this time, there arises a problem that the removal function of the workpiece W such as sand is deteriorated.

  Therefore, the vibration motor 16 that vibrates the vibration table 12 is arranged on the vibration table 12 so that the gravity center position of the vibration motor 16 and the gravity center position of the vibration table 12 are approximately the same height or close to each other. The whole can be regarded as one mass system. As a result, it is possible to generate the optimum vibration of the entire apparatus, the vibration table 12 is not greatly violated, the work W is vibrated effectively, and the sand removal function of the work W is improved. The occurrence of 10 failures and a decrease in durability can be suppressed.

  Note that, depending on the shape and configuration of the vibration table 12, the vibration motor 16 that vibrates the vibration table 12 has a height in which the center position in the height direction of the vibration motor 16 and the center position in the height direction of the vibration table 12 are substantially the same. Alternatively, it can also be realized by being arranged on the vibration table 12 so as to be close to each other. Accordingly, the shaking table 12 is not greatly violated, and the sand removal function of the workpiece W is improved by effectively vibrating the workpiece W, and at the same time, the occurrence of a failure or a decrease in durability of the vibrating sand drop device 10 can be suppressed. .

  Further, the rotational drive source 28 for rotationally driving the workpiece W is arranged on the vibration table 12 so that the gravity center position of the rotation drive source 28 and the gravity center position of the vibration table 12 are substantially the same height or close to each other. Thus, the workpiece W is effectively vibrated to improve the sand removal function of the workpiece W, and at the same time, it is possible to suppress the occurrence of failure of the vibrating sand dropping device 10 and the decrease in durability.

  Furthermore, depending on the shape and configuration of the vibration table 12, the rotational drive source 28 for rotationally driving the workpiece W includes a center position in the height direction of the rotation drive source 28 and a center position in the height direction of the vibration table 12. Are arranged on the shaking table 12 so that they are approximately the same height or close to each other, the work W is effectively vibrated to improve the sand removal function of the work W, and at the same time, the vibration sand dropping device 10 is broken. Generation and deterioration of durability can be suppressed.

  Each embodiment described above is only an example for explaining the present invention, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Vibratory sand removal apparatus 12 Vibrating table 14 Through-hole 16 Vibrating motor 18 Work rotation grip part 20 Jig 22 Air spring 24 Shaft part 26 Bearing mechanism 28 Rotation drive source 30 Motor 32 Vibration motor 34 Deceleration mechanism 36 Elastic support part 38 Air spring W Work

Claims (2)

A vibration sand removing device for dropping sand adhered to a workpiece by vibration,
A shaking table,
A vibration motor that is provided on the vibration table and vibrates the vibration table;
A work rotation gripping part that is provided on the vibration table, has a shaft part, and rotates the work around an axis of the shaft part in a state of gripping the work;
A rotation drive source provided on the vibration table for rotating the workpiece by the workpiece rotation gripping portion;
Have
The vibration sand drop device, wherein the vibration motor is arranged on the vibration table so that a gravity center position of the vibration motor and a gravity center position of the vibration table are substantially the same height. A vibration sand removing device for dropping sand adhered to a workpiece by vibration,
A shaking table,
A vibration motor that is provided on the vibration table and vibrates the vibration table;
A work rotation gripping part that is provided on the vibration table, has a shaft part, and rotates the work around an axis of the shaft part in a state of gripping the work;
A rotation drive source provided on the vibration table for rotating the workpiece by the workpiece rotation gripping portion;
Have
Vibration the vibration motor, so that the center position of the height direction central position between the vibration table in the height direction the vibration motor are substantially the same height, characterized in that arranged on the vibration table Sand removal device.

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