KR100318999B1 - Work polishing method and barrel polishing apparatus - Google Patents

Abstract

PURPOSE: A polishing method of a workpiece and a barrel polishing device are provided to easily remove dirt and an oxidized coat which adhere on a face to be polished of a workpiece prior to processes of wet-polishing and dry-polishing. CONSTITUTION: A barrel polishing device includes a polishing medium housing tank(610) in which a workpiece to be polished is housed, and the workpiece vibrating. The polishing medium housing tank has an opening(611) at the upper end. A polishing medium supply port is formed to the bottom part of the polishing medium housing tank. The workpiece is positioned under the polishing medium supply port. Polishing media(620) are continuously supplied to the surface of the workpiece through the polishing medium supply port while the workpiece vibrates. Since the polishing media are naturally dropped from the polishing medium housing tank and reduced, the supply pressure to the workpiece is gradually reduced. Thus, initial rough cutting polishing, intermediate finish polishing and finish polishing in a series of process by single polishing media are continuously performed.

Description

WORK POLISHING METHOD AND BARREL POLISHING APPARATUS}

The present invention relates to a workpiece precision polishing processing method and a barrel precision polishing apparatus.

(Conventional technology)

(Prior art and its shortcomings)

In the conventional workpiece polishing method, there is a wet polishing method in which a workpiece is dry polished with the help of a buffing wheel, and then the dry polished surface of the workpiece is wet polished. However, if the conventional precision polishing processing method as described above is employed for the purpose of precision polishing the respective workpieces, the workpieces are only wet-polishing with the acid detergent liquid surface. For this reason, the first problem of the prior art arises that dirty foreign matter is somewhat difficult to remove from the surface of the workpiece, and furthermore, it is virtually difficult to remove the oxide film from the surface of the workpiece due to the hardening achieved for the workpiece with an acidic detergent liquid. . In the conventional barrel buffing apparatus, each workpiece is subjected to precision polishing by allowing the precision abrasive medium to flow into the precision abrasive medium container while the workpiece is accommodated in the precision abrasive medium container.

However, in the conventional barrel precision polishing device configured in the above-described manner, the degree of processing obtained by the precision polishing medium is limited to a certain range by the precision polishing medium, so that the precision polishing medium is subjected to each precision polishing operation, that is, rough precision polishing. Depending on the purpose of the machining step, the intermediate finishing polishing step and the final finishing grinding step, it is necessary to replace with other kinds of precision grinding media, and also selected precision in a manner suitable for the purpose of the conventional barrel polishing device. It is necessary to arrange a plurality of barrel polishing apparatuses each including a polishing medium in a preliminary arrangement.

In any case, it causes the second problem of the prior art that it is practically difficult to improve the working efficiency of each barrel polishing operation with the conventional barrel polishing apparatus.

(Object of the present invention)

The present invention has been made to solve the first problem of the prior art as described above. Therefore, the first object of the present invention

Dirty foreign matter adhering to the surface of the workpiece to be polished and the oxide film on the surface of the workpiece can be easily removed, and then the surface of the workpiece to be subjected to precision grinding can be dry polished, and then the surface of the workpiece can be wet polished. The present invention provides a method for precision machining of workpieces. Also

The present invention has been made to solve the second problem of the prior art as described above. Therefore, it is an object of the present invention that the coarse fine grinding operation can be carried out initially at a high strength pressure generated by the supply of a single type of fine abrasive medium and then the strength of the supply pressure generated by the supply of the fine abrasive medium. It is to provide a barrel polishing apparatus which ensures that the intermediate polishing step and the finishing polishing step can be carried out continuously as the gradual decrease.

(Structure and Advantageous Effects of the Present Invention)

According to the present invention, the workpiece polishing method is carried out such that each workpiece is subjected to dry polishing after the surface of the workpiece to be subjected to precision polishing is subjected to barrel polishing, and then the workpiece is subjected to wet polishing. Thus, dirty foreign matter adhering to the surface of the workpiece to be precision polished and an oxide film spread over the entire surface of the workpiece can be easily removed before the step which is successively performed in the dry and wet fine polishing process. Therefore, when such a workpiece polishing method is employed, the surface of the workpiece to be subjected to the precision polishing is dry-polishing after the removal of dirty foreign matter adhering to the surface of the workpiece to be polished and the oxide film spread over the entire surface of the workpiece. The workpiece can then be wet polished.

Incidentally, if the barrel polishing process is carried out as a step to be carried out after the dry polishing process, the wet polishing process is carried out after the oxide film formed when the dry polishing process is performed as well as the fine polishing residue attached to the surface of the workpiece after removal from the workpiece. Can be implemented. As a result, each wet grinding operation can be carried out with high efficiency, and furthermore, during the dry grinding step, the dents and the like remaining on the surface of the workpiece which were virtually impossible to be polished by the buffing wheel can be precisely polished. . In addition, if the barrel polishing process is carried out as a step performed after the completion of the dry and wet grinding process, each wet grinding operation is carried out not only the precision grinding residues attached to the surface of the workpiece but also the dry grinding process The oxide film formed at the time may be removed after being removed from the workpiece, and further, during the dry grinding step, the recesses and the like remaining on the surface of the workpiece which were virtually impossible to be polished by the buffing wheel may be subjected to precision grinding.

According to the present invention, the barrel precision polishing apparatus has a precision polishing medium container containing the precision polishing medium and a workpiece which is configured to vibrate movement, and the precision polishing medium container has an upper end opening, and the precision polishing medium The supply port is formed at the bottom of the precision abrasive medium container, the workpiece is positioned below the precision abrasive medium supply port, and the precision abrasive medium contained in the precision abrasive medium container is continuously supplied to the workpiece while the workpiece is vibrated. It is configured to be. Therefore, the strength of the supply pressure acting on the workpiece gradually decreases as the fine abrasive medium is gradually released from the fine abrasive medium container.

In such a structure, when such a barrel polishing apparatus is employed, the coarse polishing operation can be performed during the initial cycle time when a single type of precision polishing medium is supplied to the workpiece at a high supply pressure and additionally, intermediate A series of processing steps, including finishing and fine finishing and final finishing, can be carried out continuously as the strength of the supply pressure of the precision polishing medium is gradually reduced.

Moreover, since the precision abrasive medium falls naturally, it is easily introduced into the hole formed on the workpiece. As a result, the hole portion on the workpiece can be precision polished more appropriately.

Moreover, since the supply of the precision abrasive medium to the workpiece surface is achieved by the natural fall of the precision abrasive medium, noise is hardly generated from the barrel precision polishing device, and moreover, the energy consumption can be reduced by this barrel precision polishing device. .

Incidentally, if the guide sleeve is arranged between the feed port of the precision abrasive medium container and the workpiece surface, the supply of the precision abrasive medium to the workpiece can be achieved without particular loss.

In addition, when the guide sleeve is vibrated integrally with the workpiece, the supply of the precision abrasive medium to the workpiece can be more smoothly achieved.

In addition, when the precision abrasive medium contained in the precision abrasive medium container can be compressed by operating an appropriate means, the degree of processing obtained by each precision abrasive machining operation performed on the workpiece may be changed.

1 is a cross-sectional view showing a precision polishing device operable according to the present invention.

For example, an aluminum wheel that can be used in a vehicle or the like can be used as a workpiece that can be employed to practice this invention. However, the present invention is not limited to aluminum wheels as workpieces, and all products which can each be used as workpieces are included in the concept of workpieces of the present invention. In general, a wet polishing method or a dry polishing method for precisely polishing a surface of a workpiece with a precision polishing agent is employed as the precision polishing method of the present invention. In this case, the number of buffs available to achieve the present invention may be limited to only one. Alternatively, a plurality of buffs can be used to achieve the present invention. Incidentally, the buff wheel may be displayed as one example representing the buff.

In order to achieve the present embodiment, the normal wet grinding method and the dry grinding method can be employed to perform the wet grinding method and the dry grinding method, wherein the workpiece surface is a precision grinding of the workpiece Precision polishing is carried out with the precision abrasive supplied between the surface and the workpiece surface of the buff wheel.

Additionally, in order to achieve the present invention, any one type of barrel precision polishing method, such as fluid barrel fine polishing method, vibratory barrel fine polishing method, or the like can be used as barrel fine polishing method. In addition, a type of commonly used precision abrasive such as ceramic grain or the like can be employed as the precision abrasive.

Furthermore, the barrel fine grinding operation performed as a preliminary step for the dry fine grinding step can be used as a so-called rough fine grinding operation. Furthermore, the barrel polishing operation performed as a preliminary step for the wet polishing operation can be used as a so-called intermediate polishing step because it exhibits the same operation effect as that of the dry grinding operation.

Moreover, the barrel fine grinding operation executed as a post step for the wet fine grinding operation exhibits the same operation effect as that of the wet fine grinding operation, and thus can be used as the so-called finish fine grinding step.

The invention will be described in detail below with reference to the accompanying drawings which illustrate preferred embodiments thereof.

In Fig. 1, reference numeral 610 denotes a precision polishing medium container for the barrel precision polishing device 64. The precision polishing medium (assembly) 620 is housed in the precision polishing medium container 610. Additionally, any kind of precision grinding media commonly used, such as ceramic grain, may be used as the precision grinding media 620. Reference numeral 611 denotes an upper end opening formed at the upper end of the precision abrasive medium container 610, and the interior of the precision abrasive medium container 610 is in communication with the atmosphere via the upper end opening 611. Reference numeral 612 denotes a precision abrasive medium supply port formed at the bottom of the precision abrasive medium container 610. The precision polishing medium 620 accommodated in the precision polishing medium container 610 falls naturally through the precision polishing medium supply port. At this time, the pressure intensity generated by the falling precision abrasive medium 620 is gradually reduced as the fine abrasive medium 620 is gradually removed from the precision abrasive medium container 610. Reference numeral 630 denotes a guide sleeve and the guide sleeve 630 is fitted to the bottom of the precision polishing medium container 610 from the outside in a rotatable manner. Reference numeral 631 also denotes a trumpet-shaped sleeve, which is arranged at the lower end of the guide sleeve 630 to form part of the guide sleeve 630. The function of the guide sleeve 630 is described later.

Reference numeral W denotes a wheel usable in a vehicle or the like (in the present invention, corresponding to a workpiece) and the wheel W is received inside the trumpet sleeve 631 without a substantial gap therebetween. Incidentally, the guide sleeve 630 including the trumpet-shaped sleeve 631 is integrally rotated and vibrated when the wheel W usable in a vehicle or the like is rotated.

When the precision grinding medium 620 falls naturally from the precision grinding medium container 610 while the wheel W usable in the vehicle is vibrated, the precision grinding medium 620 is a guide sleeve without a substantial gap therebetween. Via 630, the surface of the wheel W is continuously reached. Thereafter, the fine abrasive medium 620 is discharged downward through the plurality of holes 651 and 652 while the surface of the wheel W is finely polished.

As described above, as the precision abrasive medium 620 is gradually removed from the precision abrasive medium container 610, the strength of the supply pressure acting on the wheel W usable in a vehicle or the like gradually decreases. Therefore, the surface of the wheel (W) is roughly ground during the initial time when the high-intensity supply pressure is applied on the surface of the wheel (W) by using a single type of precision polishing medium used for each precision grinding operation. Can be processed. In addition, the intermediate precision polishing step and the finish fine polishing step may be continuously performed on the surface of the wheel W that can be used in a vehicle as the intensity of the supply pressure generated by the precision polishing medium 620 is gradually reduced. have.

After the precision grinding medium 620 is completely discharged into the area located under the wheel W usable in a vehicle or the like, that is, after the interior of the precision grinding medium container 610 is emptied, the precision grinding medium 620 is precisely polished. It is returned back into the medium container 610. The fine polishing medium 620 may then be repeatedly used to continuously perform the rough fine polishing step, the intermediate fine polishing step, and the finish fine polishing step.

According to the present invention, the strength of the supply pressure acting on the workpiece is gradually reduced as the fine abrasive medium is gradually released from the fine abrasive medium container.

In addition, the coarse fine grinding operation can be performed during the initial cycle time when a single type of fine abrasive medium is supplied to the workpiece at a high-intensity supply pressure, and additionally, the intermediate finishing polishing stage and the final finishing polishing stage A series of processing steps including may be carried out continuously as the intensity of the supply pressure of the precision polishing medium is gradually reduced.

Furthermore, since the precision abrasive medium falls naturally, it is easily introduced into the hole formed on the workpiece. As a result, the hole portion on the workpiece can be precision polished more appropriately.

While the invention has been described above with respect to its preferred embodiments, the invention is not limited to these preferred embodiments and various changes or modifications can be made without departing from the scope of the invention as defined by the appended claims.

Claims (4)

An apparatus for precisely grinding a workpiece in a barrel, the apparatus comprising a precision abrasive medium container in which a precision abrasive medium is accommodated and a workpiece adapted to vibrate movement, wherein the precision abrasive medium container has an upper end opening. And a precision abrasive medium supply port is formed at the bottom of the precision abrasive medium container, and the workpiece is located below the precision abrasive medium supply port, and the precision abrasive medium is disposed while the workpiece is vibrated. Through the precision grinding medium supply port, it is continuously supplied to the surface of the workpiece. As the precision grinding medium falls naturally from the precision grinding medium container and decreases, the supply pressure to the workpiece is gradually reduced, so that the single precision grinding medium is initialized. Rough polishing, intermediate finishing, and final finishing Apparatus as ranging. 5. An apparatus according to claim 4, wherein the guide sleeve is arranged between the precision abrasive supply port of the precision abrasive medium container and the surface of the workpiece. 6. The apparatus of claim 5 wherein said guide sleeve vibrates integrally with said workpiece. 6. The apparatus of claim 5, wherein the precision abrasive medium contained in the precision abrasive medium container can be compressed by any suitable means.