KR20010001531A - Magnetic Assisted Polishing apparatuss - Google Patents

Abstract

PURPOSE: A magnetic polisher is provided to polish a target material by using magnetism generated from a coil to which a current is fed. CONSTITUTION: A polisher is made up of a machine tool(1) having a main shaft for feeding a rotational force, a rotatable steel core(5) and a coil(7) for feeding a magnetic force to an outer part of the steel core. Herein, the steel core is installed to be rotatable at a certain interval with an article. The article is polished by the rotation of the steel core in a state of interposing magnetic polishing particles between the articles. Accordingly, as the magnetic polishing particles polish the surface of the article, it is possible to process the complex surface of the article.

Description

Magnetic Assisted Polishing apparatus

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing apparatus, and more particularly, to a magnetic polishing apparatus configured to polish a workpiece by using a magnet generated from a coil to which a current is applied.

Grinding, which is an important process for determining the quality of a mold product, is usually highly dependent on manual work by experienced workers. In addition, the processing method of the currently used high hardness material may include a method of performing a polishing process after the first electric discharge machining, and a method of performing grinding to the first machining before the heat treatment and then polishing.

However, according to the conventional polishing methods such as the former, the discharge processing takes a long time and the processing precision and the processing surface are rather rough, which leads to the disadvantage of very low productivity and unsatisfactory degree. The latter method divides the process. As a result, it is pointed out that it is difficult to maintain precision because the entire processing time is long and the amount of polishing due to deformation of the material during heat treatment increases.

That is, in the conventional polishing method, since the polishing process is performed while the polishing pad is directly in contact with the polishing object, problems of degree and various problems in the process are raised.

An object of the present invention is to achieve the mechanization and automation of the polishing process through a magnetic process.

Another object of the present invention is to provide a polishing apparatus capable of ensuring a sufficient degree in a polishing step.

1 is an explanatory diagram showing a configuration of a self-polishing apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

1 ..... Machine Tool 5 ..... Iron Core

7 ..... Coil A ..... Self-polishing particles

W ..... Workpiece

Self-polishing apparatus according to the present invention for achieving the above object is a machine tool having a main shaft capable of applying a rotational force; An iron core rotatably mounted to the main shaft; And a coil installed to apply a magnetic force to an outer circumferential outer portion of the iron core; The iron core is installed so as to be rotated at regular intervals from the workpiece, the technical gist that the polishing of the workpiece is performed by rotating in the state of interposing the magnetic abrasive particles having magnetic properties and grindingability between the workpiece and Doing.

According to such a self-polishing apparatus, since the surface of a workpiece | work is polished by flexible self-polishing particle | grains, there exists an advantage that a complicated shaving can be easily polished. And the effect with the high precision of abrasion processing can also be anticipated.

Next, the present invention will be described in more detail with reference to the embodiments shown in the drawings.

Referring to Fig. 1 showing the polishing apparatus according to the present invention, it can be seen that the iron core 5 is mounted on the main shaft 3 of the NC machine tool 1. Therefore, the iron core 5 can be rotated by the NC machine tool (1).

The coil 7 is wound around the central portion of the iron core 5. Of course, the coil 7 is wound in a state supported by the support 9, and the coil 7 is configured such that a direct current can be applied by a power source. Therefore, when a current is applied to the coil 7, a magnetic field will be formed around the coil.

The lower end portion 5a of the iron core 5 can maintain a constant distance from the work W, and the self-polishing particles A are filled between the work W and the work W. As shown in FIG. The workpiece W is a workpiece to which predetermined surface polishing is required.

Here, the self-polishing particle A will be described briefly.

The self-polishing particles A are formed by the rotation of the iron core 5 while maintaining the state of being collected at the lower end of the iron core 5 by the magnetic force formed through the iron core 5 by the coil 7. W) has a surface polishing function.

Therefore, the magnetic abrasive particles are a magnetic component capable of maintaining a state in which they are collected without being dispersed between the workpiece W by a magnetic force formed at the lower end of the iron core 5 by the coil 7, and the workpiece W. It contains a polishing component capable of polishing. In order to satisfy these requirements, it is possible to use magnetic iron (Fe) powder and abrasive grain powder (eg, diamond powder) having grinding properties. After mixing the powder in a constant ratio to melt in a plasma welding machine to make beads, by grinding the beads can be produced self-polishing particles.

That is, the self-polishing particle | grains defined by this invention mean the particle | grains of the mixed powder which have both magnetic property and grindingability. Such self-polishing particles may be used as they are in the form of powder, or may be used in the form of a liquid abrasive slurry to which a liquid crystal solution is added.

Figure 1 shows an embodiment using the self-polishing particles (A) in the liquid abrasive slurry state. In Fig. 1, reference numeral 10 denotes a supply source for supplying the self-polishing particles in the slurry state, 12 a supply pipe for supplying the self-polishing particles in the slurry state, and 14 a polishing action on the surface of the workpiece W. By means of a recovery pipe for recovering the self-polishing particles in the slurry state flowing to the outside of the polishing portion. Through such a device, liquid self-polishing particles will be recovered after performing a polishing function while continuously being supplied to the surface of the workpiece (W). In addition, a predetermined disturber may be installed inside the supply source 10 to prevent the self-polishing particles from settling, and thus it may be possible to always supply a slurry of the self-polishing particles having a constant concentration.

Next, the polishing function of the workpiece W by the rotation of the iron core 5 will be described.

As can be seen from the enlarged view between the lower end 5a of the iron core 5 and the work W, the magnetic force lines ML by applying a current to the coil 7 between the iron core 5 and the work W. FIG. ) Is formed. By such magnetic lines of force, the magnetic component contained in the magnetic abrasive particles (A), for example Fe powder, is magnetized and arranged in a brush shape according to the polarity from the end of the iron core to the workpiece, which is substantially abrasive grinding stone. Will perform the function of.

In this state, when the iron core 5 is rotated by the power source of the NC machine tool 1 itself, the working pressure of the grinding process is applied to the workpiece (W) by the rotation of the iron core (5). Therefore, the workpiece W will be subjected to the necessary polishing by the above-described self-polishing particles.

Next, the relationship between the rotation of the iron core 5 and the polishing function will be briefly described. First, when the rotational speed of the iron core 5 is slow, the grinding wheel due to the self-polishing particles arranged on the brush formed by the magnetic force is bent or slippery, so there is a disadvantage in that the work W cannot be polished efficiently. If the rotation speed is high, the centrifugal force applied to the self-polishing particles is increased, and the centrifugal force is larger than the magnetic force, so that the abrasive (for example, diamond slurry) does not penetrate evenly between the iron particles, thereby reducing the polishing efficiency. do. Therefore, the application of the appropriate rotational speed is the highest polishing efficiency of the workpiece.

Of course, there are various factors related to the polishing efficiency, such as the type of abrasive, magnetic flux density, surface characteristics of the workpiece before processing, but if the above factors are the same, the rotation speed as described above is the most decisive factor.

As described above, according to the present invention, it can be seen that a predetermined polishing function can be performed without directly contacting the polishing figure (polishing pad) with the workpiece. That is, according to this invention, the surface of a workpiece is suitably processed by applying a rotational force in the state which the magnetic abrasive particle which is the powder which has predetermined magnetic property and grindingability was crowded by the magnetic force line.

According to the present invention as described above, the following effects can be expected.

In the polishing apparatus according to the present invention, in a mechanical apparatus used for cutting a workpiece, such as an NC machine, it can be seen that polishing can be performed without detaching the workpiece. Therefore, it can be seen that it is possible to shorten the processing time in the polishing process following the cutting process, which will result in improved productivity. In addition, there is an advantage that the numerical data in the cutting process can be used directly in the grinding process.

In addition, since the polishing is not polishing by direct contact with the work, but the predetermined flexibility is given to the self-polishing particles, it is possible to sufficiently perform the predetermined polishing even if the surface of the work has a complicated shape. . This means that even if it is not dependent on skilled workers, it is possible to carry out polishing that ensures the surface quality at all times, and at the same time, it is expected that the standard work of polishing processing can be presented.

Claims (1)

A machine tool having a main shaft capable of applying rotational force; An iron core rotatably mounted to the main shaft; And A coil installed to apply magnetic force to an outer circumferential outer portion of the iron core; The iron core is installed so as to be rotated at a predetermined interval from the workpiece, the workpiece is polished by rotating in the state interposed between the workpiece and the magnetic abrasive particles having magnetic and grinding characteristics, characterized in that Self-polishing device.