JP2000334644A - Inner surface grinding method and tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely grind the inner surface of a tubular material to be ground by a simple tool. SOLUTION: This method has a step for installing a tool shaft 2 into the inside of a tubular material 3 to be ground, a step for supplying abrasives 6 having charged ultra-particulates between at least the inner surface of the material 3 and the outer surface of the shaft 2, a step for applying voltage to an electrode 7 arranged in the outer part of the material 3 and shaft 2, and a step for moving and rotating the shaft 2 in the longitudinal direction of the material 3. Consequently the material 3 can be simply and surely ground because the ultra-particulates adheres to the shaft 2 to grind the inner surface of the material 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass tube cylinder as a reagent dispensing part used for a blood analyzer, a glass container into which a subject is filled for transmitting a laser beam for inspection, The present invention relates to an inner surface polishing method and an inner surface polishing tool used for mirror-finishing an inner surface of an object to be polished such as a tube such as a metal tube or a container.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional polishing tool 101 disclosed in Japanese Utility Model Publication No. 8-1808 for polishing the inner surfaces of various types of objects to be polished. The polishing tool 101 is an expandable tool used for honing, and is used for polishing a bent pipe inner surface. This polishing tool 10
Reference numeral 1 denotes a spherical bulge 10 on a tool shaft 102 serving as a rotation axis.
4 are provided, and a polishing surface 103 is formed on the outer peripheral surface of the bulging portion 104. The tool 101 has a bulge 10
By polishing the polishing surface 103 of No. 4 against the inner surface of the tube, the inner surface of the tube is polished.

[0003]

However, the conventional polishing tool 101 shown in FIG.
It is necessary to form in advance a shape corresponding to the inner diameter (inner diameter) of the pipe to be polished, and if the spherical diameter of the bulging portion is set in advance for the inner diameter of the pipe, it must be manufactured. It has the troublesome complexity. Moreover, the conventional polishing tool 10
No. 1 is based on the premise that the cross-sectional shape of the tube is circular, and has a problem that it is difficult to cope with a work having a square cross-section such as a cuppet.

When the inner diameter of the pipe is very small, not only is it difficult to form the bulging portion 104 on the tool shaft 102, but also the tool shaft 102 itself becomes thin, so that it can withstand the processing resistance during polishing. It is not possible to secure only the strength. This is particularly remarkable in the case of an ultrafine tube of several millimeters or less. Further, since the bulging portion 104 is worn by the polishing process, it is necessary to perform remanufacturing to form the bulging portion.

The present invention has been made in consideration of such conventional problems, and eliminates the need for manufacturing a polishing tool for adjusting to the inner diameter of a tubular workpiece.
It is an object of the present invention to provide an inner surface polishing method and an inner surface polishing tool that can reliably polish the inner surface of even a very thin tube without causing wear of the tool accompanying the polishing and can be used for a long time. .

[0006]

According to a first aspect of the present invention, there is provided an inner surface polishing method for polishing an inner surface of a tubular object to be polished, wherein a tool shaft is provided inside the object to be polished. And supplying an abrasive having charged ultrafine particles between at least the inner surface of the object to be polished and the outer surface of the tool shaft, and an electrode disposed outside the object to be polished. And a step of applying a voltage to the tool shaft, and a step of moving the tool shaft in the longitudinal direction of the object to be polished.

According to the present invention, an abrasive having charged ultrafine particles is supplied to a state in which the tool shaft is inserted into the object to be polished, and the power supply means supplies the tool shaft with a polarity opposite to the polarity of the ultrafine particles to the tool shaft. At the same time as applying a charge, a charge having the same polarity as that of the ultrafine particles is applied to an electrode outside the object to be polished. By this application, the ultrafine particles adhere to the tool shafts having different polarities by electrophoresis, that is, the ultrafine particles adhere to the so-called electrophoresis phenomenon. Then, the gap between the inner surface of the object to be polished and the tool shaft is filled with the ultra-fine particles attached around the tool shaft. By moving the tool shaft in the longitudinal direction in this state, the fine particles are dragged by the tool shaft and simultaneously rub the inner surface of the object to be polished, so that the inner surface can be polished.

Therefore, according to the present invention, it is not necessary to adapt the tool shaft to the inner diameter of the tubular workpiece, and even if the workpiece is an ultrafine tube, the inner surface of the workpiece can be reliably polished, and the polishing is accompanied. It can be used stably for a long time without causing abrasion.

According to a second aspect of the present invention, there is provided an inner surface polishing tool for polishing an inner surface of a tubular workpiece.
A conductive tool shaft having an outer diameter smaller than the inner diameter of the object to be polished, power means connected to one terminal of the tool shaft, and the other object connected to the other terminal of the power means; And an electrode installed outside the device.

According to the present invention, the power supply means applies electric charges to the tool shaft and the electrode outside the object to be polished, so that the ultrafine particles adhere to the periphery of the tool shaft by electrophoresis. Therefore, by moving the tool shaft in the longitudinal direction, the inner surface of the object to be polished can be polished. Therefore, it is not necessary to adjust the tool shaft to the inner diameter of the object to be polished, and even if the object to be polished is an ultrafine tube, the inner surface thereof can be polished and there is no wear, so that it can be used for a long time. it can.

A third aspect of the present invention is the invention according to the second aspect, wherein a polishing sheet made of an elastic material is attached to an outer surface of the tool shaft.

According to the present invention, since the ultrafine particles are wrapped around the polishing sheet or the separated ultrafine particles are captured by the unevenness of the polishing sheet surface, reliable polishing can be performed. In addition, since the polishing sheet has elasticity, the polishing sheet can follow the gap between the tool shaft and the object to be polished, thereby enabling good polishing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments shown in the drawings. In each of the embodiments, the same elements are denoted by the same reference numerals and correspond to each other.

(Embodiment 1) FIGS. 1 (a) and 1 (b) show Embodiment 1 of the present invention, in which an inner surface polishing tool 1 is smaller than the inner diameter of a cylinder 3 made of glass to be polished. A tool shaft 2 having an outer diameter and connected to an upper shaft of a honing device or a drilling machine (not shown), a power supply device 5 as a power supply unit for applying a voltage to the tool shaft 2, and an abrasive 6. I have.

The tool shaft 2 is formed of a conductive material such as stainless steel, brass, phosphor bronze and the like. The power supply device 5 is composed of a DC power supply, and has a brush 4 as one terminal.
Is connected to the tool shaft 2 and the other terminal is connected to the electrode 7. The power supply 5 applies a positive charge to the tool shaft 2 and a negative charge to the electrode 7.

The abrasive 6 is in a liquid state and is filled in a polishing container 15. This abrasive 6 has cylinders 3,
The tool shaft 2 and the electrode 7 are immersed. In this case, tool axis 2
Is inserted into the cylinder 3 while the electrode 7 is immersed in the abrasive 6 so as to be located outside the cylinder 3.

The abrasive 6 has charged ultrafine particles, for example, colloidal silica, colloidal alumina,
Colloidal cerium or the like can be used. Charged ultrafine particles are dispersed in these abrasives 6, and negatively charged silica ultrafine particles 8 are dispersed in colloidal silica. On the other hand, colloidal alumina and colloidal cerium can positively charge ultrafine particles by a production method. In the case of colloidal alumina or colloidal cerium in which the ultrafine particles are positively charged as described above, contrary to the following embodiment,
By connecting the tool shaft 2 to the minus and the electrode 7 to the plus, it is possible to obtain the same effect as the following embodiment.

In this embodiment, a cylinder 3, a tool shaft 2 and an electrode 7 to be polished are immersed in a liquid of a colloidal silica polishing material 6 having charged ultrafine particles, and a power supply device 5 sends the tool shaft 2 And a negative charge is applied to the electrode 7. With this application, the negatively charged silica ultrafine particles 8 migrate to and adhere to the positive tool shaft 2. As a result, as shown in FIG.
, The gap h between the inner surface of the cylinder 3 and the tool shaft 2 is filled with the silica ultrafine particles 8.

In this state, the upper shaft of the honing machine or the drilling machine which supports the tool shaft 2 is rotated and reciprocated in the vertical direction which is the longitudinal direction. This movement causes the silica ultrafine particles 8 to be dragged by the tool shaft 2 and simultaneously rubs the inner surface of the cylinder 3 which is the object to be polished, so that the inner surface of the cylinder 3 is polished.

As long as the entire inner surface polishing tool 1 can be moved in the vertical direction, that is, in the longitudinal direction of the cylinder 3 to be polished, an existing honing machine or drilling machine may be used. Such a honing machine or drilling machine is more preferable because the entire inner surface polishing tool 1 can be rotated around the tool axis 2.

In such an embodiment, since the attached silica ultrafine particles 8 are attached to the tool shaft 2 by the potential applied by the power supply device 5, even if the separation occurs due to the force of rubbing against the inner surface of the cylinder 3, The ultrafine silica particles 8 interposed in the periphery can be adhered to the tool shaft 2 again to continue the polishing, and the polishing can be performed for a long time. At the same time, the growth of the ultrafine silica particles 8 accompanying the adhesion generates a pressure between the inner surface of the cylinder 3 and the tool shaft 2, so that a high polishing rate can be obtained.

Even if the inner diameter of the cylinder 3 is increased by the polishing, the silica ultrafine particles 8 grow and the tool shaft 2
Since the outer diameter of the cylinder increases, the state of contact with the inner surface of the cylinder 3 and the pressure acting on the polishing do not decrease. Further, even when the inner diameter of the cylinder 3 is very small, for example, 3 mm or less, the machining can be performed by manufacturing the shaft diameter of the tool shaft 2 slightly smaller than the inner diameter. In addition, it is possible to polish even the inner surface of the ultrafine tube.

Therefore, according to the present embodiment, it is necessary to form the tool shaft 2 in advance in accordance with the inner diameter of the object to be polished by utilizing the attachment and growth of ultrafine particles due to the electrophoresis phenomenon. In addition, it is possible to polish even the inner surface of the ultrafine tube.

(Embodiment 2) FIG. 2 shows Embodiment 2 of the present invention. In this embodiment, the outer peripheral portion of the tool shaft 2 has a structure that can easily capture and hold ultrafine particles in order to increase the polishing efficiency of the object to be polished. For this reason, in this embodiment, a spiral groove 9 such as a drill bit is formed in the outer peripheral portion of the tool shaft 2 in the axial direction. The operation of polishing in this embodiment is the same as in the first embodiment.

According to this embodiment, the same operation as in the first embodiment is performed, but since the spiral groove 9 is formed on the outer peripheral portion of the tool shaft 2, the silica ultrafine particles 8 adhered by the electrophoresis phenomenon are removed. , And is easily captured and held by the depression of the spiral groove 9.
Thereby, the detachment of the attached silica ultrafine particles 8 can be prevented, and higher polishing efficiency can be secured. Also,
Due to the formation of the spiral groove 9, a sharp top 10 is formed on the surface of the tool shaft 2. Since the concentration of electric charges is easily generated on the top portion 10, the intensive adhesion of the ultrafine silica particles 8 due to the electrophoresis phenomenon is easily generated, and more efficient polishing can be performed.

In FIG. 2, the spiral groove 9 is used.
It is not limited to the spiral groove 9 as long as it is an uneven portion for making the silica ultrafine particles 8 easily adhere and hold. For example, the same effect can be obtained even with fine irregularities formed by roughening the surface of the tool shaft 2 using sandblasting or a coarse file.

Therefore, according to such an embodiment,
Adhesion and growth of ultrafine particles due to the electrophoresis phenomenon can be promoted, high holding power can be given, and higher polishing efficiency can be secured.

(Third Embodiment) FIG. 3 shows a third embodiment. In this embodiment, in order to increase the polishing efficiency, the tool shaft 2 has a structure that can easily capture and hold the ultrafine particles, and also ensures a higher polishing efficiency.

As shown in FIG. 3, a polishing sheet 11 made of an elastic material is attached to the outer peripheral portion of the tool shaft 2. As the polishing sheet 11 made of an elastic material, a foamed resin sheet such as polyurethane or a nonwoven fabric sheet can be used. In such a polishing sheet 11, in the case of a foamed resin sheet, the sheet itself has a large number of holes.
Is formed so as to be exposed. The outer diameter of the tool shaft 2 and the polishing sheet 11 is set so that the tool shaft 2 and the polishing sheet 11 can be inserted into the cylinder 3 which is the object to be polished.
The operation in this embodiment is the same as that in the first embodiment.

According to this embodiment, the operation is the same as that of the first embodiment. However, since the polishing sheet 11 is attached to the surface of the tool shaft 2, the ultrafine silica particles 8 adhered by the electrophoresis phenomenon. , Many holes that the polishing sheet 11 has,
Since it is captured by the unevenness on the surface, it is easily held. Since this capture has nothing to do with electrical adhesion, even the exfoliated silica ultrafine particles 8 can be retained. As a result, the adhered ultrafine silica particles 8 can be prevented from being separated, so that a higher polishing efficiency can be secured.

Since the polishing sheet 11 made of an elastic material is interposed between the tool shaft 2 and the inner surface of the cylinder 3, the polishing sheet 11 is formed with a rough outer diameter such that the polishing sheet 11 is pressed into the inner diameter of the cylinder 3. Is also possible, and molding is facilitated. In addition, a higher polishing pressure can be applied to the inner surface of the cylinder 3 by press-fitting, so that a higher polishing efficiency can be obtained. Furthermore, the presence of the polishing sheet 11 prevents direct contact between the tool shaft 2 and the inner surface of the cylinder 3, so that damage to the inner surface of the workpiece due to the contact can also be prevented.

Further, in this embodiment, when the polishing sheet 11 is a foamed polyurethane, since the sheet itself is porous, an electric current flows through the holes (pores), and the ultrafine particles can be attached. When the polishing sheet 11 is a non-woven fabric, the tool shaft 2 can be used by partially shaving off the non-woven fabric. For example, by shaving the nonwoven fabric so as to form the spiral groove 8 as described in the second embodiment, the silica ultrafine particles 8 can be easily captured, and a high polishing effect can be obtained.

According to such an embodiment, a higher polishing efficiency can be ensured, and it is possible to prevent the tool shaft 2 from coming into contact with the polished surface of the workpiece 3 to cause defects such as scratches. Can be prevented.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment. In this embodiment, the inner surface of the object to be polished having a polygonal shape is polished, and the object to be polished is made of glass used when measuring the object by transmitting laser light with a blood analyzer or the like. Of the container 12.

As shown in FIG. 4, the container 12 as an object to be polished has a tubular shape having a square inner surface. On the other hand, the outer shape of the tool shaft 2 is formed to be a quadrangle that matches the inner surface of the container 12.

The operation of polishing in this embodiment is the same as that of the first embodiment.
Since the inner surface of the tool shaft 2 is rectangular, the tool shaft 2 is not rotated as in the first to third embodiments.
Polishing is performed only by the vertical movement of. Also in this polishing, since the ultrafine particles in the polishing material adhere to the outer surface of the polishing tool 2, the polishing can be performed well even if it is square. Also in this embodiment, the first embodiment
Similarly to the above-mentioned cases 3, a groove may be formed on the surface of the tool shaft 2, or a polishing sheet may be adhered and polished. In addition, for the inner surface of a polygon other than a quadrangle such as a triangle or a pentagon, the outer shape of the tool shaft 2 is adjusted to these polygons.
The polishing can be performed.

In this embodiment, the tool shaft 2
Concentration of charges is likely to occur at the square corner 13 of, and the progress of polishing of the corner of the container 12 may be faster than at other parts of the inner surface. In this case, in order to adjust the polishing efficiency, the corner 13 of the tool shaft 2 is chamfered to adjust the polishing rate.

Therefore, according to this embodiment, polishing can be performed even if the inner surface of the object to be polished is polygonal.

From the above description, the present invention includes the inventions of the following additional items.

(Supplementary Item 1) In an inner surface polishing method for polishing the inner surface of a glass tube or a metal tube, a process of installing a tool shaft inside the tube of the object to be polished, and charging the inside of the tube and the electrodes. An inner surface polishing method, comprising the steps of: supplying a polishing material having the ultrafine particles thus formed; applying a voltage to the tool shaft and the electrode; and operating the tool shaft in the vertical and rotational directions.

According to the present invention, since the polishing is performed by the ultrafine particles adhered to the tool shaft, the tool shaft does not need to conform to the shape of the inside of the tube.
Polishing can be performed, and wear due to polishing does not occur.

(Appendix 2) An inner surface polishing tool for polishing the inner surface of a tubular object to be polished such as a glass tube or a metal tube, a tool shaft having an outer diameter smaller than the inner diameter of the object to be polished and having conductivity. And a power supply device connected to the tool shaft, and an electrode connected to a pole opposite to the tool shaft.

According to the present invention, the application of the power supply device causes the ultrafine particles to adhere to the periphery of the tool shaft due to the permanent movement of the electric power, thereby performing the polishing. For this reason, it is not necessary to adjust the tool shaft to the inner diameter of the object to be polished, and even if the object to be polished is an ultrafine tube, the inner surface can be polished and there is no wear, so that it can be used for a long time. Can be.

(Additional Item 3) An internal polishing tool according to Additional Item 2, wherein a polishing sheet made of an elastic material is attached to an outer diameter portion of the tool shaft.

In the present invention, since the ultrafine particles are wrapped around the polishing sheet or the separated ultrafine particles are captured by the unevenness of the surface of the polishing sheet, reliable polishing can be performed.

(Supplementary item 4) An inner surface polishing tool for polishing an inner surface of a tubular workpiece to be polished, the tool shaft having conductivity and having an outer diameter smaller than the inner diameter of the workpiece.
An inner surface polishing apparatus comprising: a power supply unit having one terminal connected to the tool shaft; and an electrode connected to the other terminal of the power supply unit and disposed outside the object to be polished. Tools.

According to the present invention, the application of the power supply means causes the ultrafine particles to adhere to the periphery of the tool shaft due to the permanent action of the electric power to perform polishing. Therefore, it is not necessary to adjust the tool shaft to the inner diameter of the workpiece. Moreover, even if the object to be polished is an ultrafine tube,
Since the inner surface can be polished and there is no wear, it can be used for a long time.

(Supplementary note 5) The invention according to supplementary note 4, wherein the tool shaft is rotatable and movable in the axial direction.

In the present invention, since the tool shaft rotates and moves in the axial direction, the attached ultrafine particles are dragged and can exert a polishing action on the inner surface of the object to be polished.

(Additional Item 6) The invention according to additional item 4 or 5, wherein the outer diameter portion of the tool shaft is provided with irregularities.

According to the present invention, since the ultrafine particles can be reliably captured by the unevenness provided on the tool shaft, the polishing can be performed satisfactorily.

[0052]

According to the first aspect of the present invention, since polishing is performed by attaching ultra-fine particles to the tool shaft, the tool shaft does not need to be adapted to the inner diameter of the tubular workpiece, and the workpiece is not polished. Even an ultrafine tube can be reliably polished, and can be used stably for a long period of time without causing abrasion due to polishing.

According to the second aspect of the present invention, since the inner surface of the object to be polished can be polished by rotating the tool axis to which the ultrafine particles are attached in the longitudinal direction and rotating, the tool axis is adapted to the inner diameter of the object to be polished. It is not necessary, and can be polished even if the object to be polished is an ultrafine tube, and can be used for a long time because there is no wear.

According to the third aspect of the present invention, since the tool shaft is provided with the polishing sheet, the ultrafine particles can be reliably captured, and the polishing can be reliably performed.

[Brief description of the drawings]

FIGS. 1A and 1B show Embodiment 1 of the present invention, in which FIG. 1A is an overall sectional view and FIG. 1B is an enlarged sectional view of a polished portion thereof.

FIG. 2 is an overall cross-sectional view of Embodiment 2 of the present invention.

FIG. 3 is an overall sectional view of a third embodiment of the present invention.

FIG. 4 is an overall perspective view of a fourth embodiment of the present invention.

FIG. 5 is a perspective view of a conventional polishing tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Internal polishing tool 2 Tool shaft 3 Cylinder 5 Power supply device 6 Abrasive material 7 Electrode 8 Ultrafine silica particles

Claims (3)

[Claims] 1. An inner surface polishing method for polishing an inner surface of a tubular object to be polished, wherein a step of installing a tool shaft inside the object to be polished, wherein at least an inner surface of the object to be polished and an outer surface of the tool shaft are formed. A step of supplying an abrasive having ultrafine particles charged in between, a step of applying a voltage to the electrode and the tool shaft disposed outside the object to be polished, and a step of applying the tool shaft to the object to be polished. Moving the resin in the longitudinal direction. 2. An inner surface polishing tool for polishing an inner surface of a tubular object to be polished, comprising: a conductive tool shaft having an outer diameter smaller than the inner diameter of the object to be polished; An inner surface polishing tool comprising: a power source connected to the power source; and an electrode connected to the other terminal of the power source and installed outside the object to be polished. 3. A polishing sheet made of an elastic material is attached to an outer surface of the tool shaft.
An inner surface polishing tool as described.