JP6443793B2 - Buffing method using electric single rotation polisher for buffing and electric single rotation polisher for buffing - Google Patents

Description

The present invention relates to a buff polishing method using a rotary polisher capable of displaying torque and a rotary polisher capable of displaying torque, and more particularly to an electric single rotary polisher for buff polishing, which is used when buffing a painted surface such as automobile paint. The present invention relates to a conventional buffing method and an electric single rotation polisher for buffing.

Conventionally, electric single-rotation polishers are frequently used when buffing painted surfaces such as automobile paints, but experience has been found that the polishing force caused by the polisher itself is affected by the number of revolutions and the pressing force of the polisher. Although it was known, there was no way to confirm on the spot what the pressing force was. For this reason, the worker relies on intuition with a pressing force that is considered to be good empirically, and there are cases in which the work varies and the same work cannot be performed if the workers are different.

The present invention has been made in view of such circumstances, and in buffing using a single rotary polisher, while displaying the torque on the polisher and viewing the numerical value of the torque caused by the pressing force, it relates to the experience of the operator. The object is to enable buffing with an appropriate pressing force.
As a result, work that has been done by the sensibilities of experienced craftsmen can now be performed while looking at the numerical values, and if working in an appropriate torque range, even less experienced workers can rely on intuition, It is possible to work properly.

As a result of diligent research, the present inventors have converted into a torque value from the amount of power consumption corresponding to the pressing force generated when a single rotation polisher is used and the rotation speed of the polisher at that time, and display it on the polisher itself. Thus, it has been found that the apparatus can be operated while checking the torque value.
That is, the present invention uses an electric single rotation polisher to press the buff of the electric single rotation polisher against the painted surface as the polishing surface and manage the polishing operation per unit area of the buff polishing object while observing the torque value. A buffing method using an electric single-rotation polisher for polishing, wherein an average value range of torque values is 3.0 to 9.0 N · m.

The electric single rotation polisher for buffing of the present invention is an electric single rotation polisher for buffing used in the buffing method using the electric single rotation polisher for buffing of the present invention, and has a torque value display function. It is characterized by that.
Moreover, in the electric single rotation polisher for buffing of the present invention, the torque value display function can be displayed with analog or digital or both simultaneously.
Further, the electric single rotary polisher for buffing can have a painted surface as an automobile painted surface.

When the buffing is performed using the single rotary polisher capable of displaying torque according to the present invention, as shown in the results of Table 1, good results are obtained by working in an appropriate torque range, and the values are confirmed while visually confirming the numerical values. I knew I could work.

FIG. 1 shows changes in torque over time (Example 1). FIG. 2 shows changes over time in torque (Example 2). FIG. 3 shows changes in torque over time (Example 3). FIG. 4 shows changes with time in torque (Example 4). FIG. 5 shows changes over time in torque (Example 5). FIG. 6 shows the change in torque over time (Example 6). FIG. 7 shows changes over time in torque (Example 7). FIG. 8 shows changes with time in torque (Example 8). FIG. 9 shows changes in torque over time (Comparative Example 1). FIG. 10 shows changes in torque over time (Comparative Example 2). FIG. 11 shows changes in torque over time (Comparative Example 3). FIG. 12 shows the change in torque over time (Comparative Example 4). FIG. 13 shows an example of an electric single rotary polisher for buffing according to the present invention.

The single-rotation polisher capable of displaying torque according to the present invention is equipped with a monitor that digitally displays torque values on a single-rotation electric polisher and connected to a main body capable of data processing and recording with a cable. The main body analyzes the electrical signal generated by the polisher, and displays and records the number of revolutions of the polisher, the amount of power consumption, and the converted torque value. The torque value is displayed on a monitor attached to the polisher itself separately from the main body.

Single rotation type electric polishers used in the present invention are commercially available. Sander polishers PE-2010, PE-2100 (manufactured by Ryobi Co., Ltd.), electronic polishers SP18VB, SP13V (manufactured by Hitachi Koki Co., Ltd.), electronic polisher PV7001CSP. (Made by Makita Corporation). These are variable rotation speed types, and the rotation speed can be changed in a range of approximately 600 to 2000 rpm.

In the present invention, an infrared projector is attached to the polisher, and a metal film that reflects infrared rays emitted from the projector is attached to a portion near the circumference of a rubber pad for fixing a buff rotating at the tip of the polisher. It is a mechanism that transmits information on the number of revolutions of the polisher to the main body through the attached light receiver.
These are called optical sensors (optical rotation detectors), and information on the number of rotations is transmitted to the sequence controller by high-speed pulses via a solid state relay (semiconductor relay) in the main body.

In the main body, a power transducer that measures the power consumption of the polisher, a sequence control unit that calculates and outputs a torque value from the information on the rotational speed and power consumption sent from the polisher, and displays the output data, A recorder unit capable of recording and storing, a current transformer for converting from AC to DC, various fuses, safety devices such as an earth leakage breaker, and the like are arranged.
It was found that when buffing using a single rotary electric polisher capable of displaying torque produced in the present invention, it is possible to work while visually confirming an appropriate torque range, and even an inexperienced operator can work reliably. .
Further, the unit area to be buffed in the present invention refers to the area of the work surface that comes into contact with the buff rotating in the effective work state.

The embodiments of the present invention are summarized as follows.
(1) For buff polishing, the buff of the electric single rotation polisher is pressed against the polishing surface using an electric single rotation polisher, and the polishing operation per unit area to be buffed is managed while observing the torque value. A buffing method using an electric single rotary polisher.
(2) The buffing method using the electric single rotary polisher according to (1) above, wherein the average value range of torque values is 3.0 to 9.0 N · m.
(3) An electric single rotation polisher for buffing used for buffing a painted surface, etc., and having a torque value display function.
(4) The electric single rotation polisher for buffing according to the above (3), wherein the torque value display function is a display having analog, digital, or both at the same time.
(5) The electric single rotating polisher for buffing according to the above (3) or (4), wherein the painted surface is an automotive painted surface.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by these examples.
(Production of torque display polisher)
In the present invention, (a) a digital panel meter (MAL Co., Ltd. 43AL1-S) capable of displaying torque on a commercially available single-rotation electric polisher (PE2100 manufactured by Ryobi Co., Ltd.) and an optical sensor for measuring the rotational speed (Ono) (B) Main body is a power consumption measurement unit (Power Transducer / M System Co., Ltd. 14WTN-21), and the torque value is calculated from the information of power consumption and rotation speed. Sequence control unit that converts and outputs data [PLC (Programmable Logic Controller) / Keyence KV-N14AR and KV-N3AM] and a recorder unit that displays, records, and saves each data (Keyence Corporation) TR-W500).
The power source of (b) is connected to the outlet built in (b), and the power consumption of (b) can be monitored by (b). At the same time, (b) and (b) are connected by a cable, and information on the number of rotations and torque is transmitted with an electrical signal to each other. The number of revolutions of the polisher and the converted torque value are displayed, and the torque value is displayed on the digital panel meter in (a) so that the operator can check the torque value at hand.
(Formula for torque)
The torque value T (N · m) is calculated from the polisher power P (power consumption / kW) and the rotational speed n (rpm) by the following formula.
T = 9549P / n

(Buffing test)
The buffing test was performed using the polisher capable of displaying torque prepared in paragraph 0011 above. As a test plate, a bonnet for a light vehicle painted in black (3: 1 LX clear paint for automobile repair manufactured by Nippon Paint Co., Ltd. was applied to the outermost surface and completely dried) was used. After removing the dirt and debris adhering to the painted surface using Trecut Pink (# 1500 abrasive paper equivalent of abrasive polishing paper manufactured by Kovacs Co., Ltd.), buffing with a compound and polishing trace of Trecut Pink ( The paper was repaired. Specifically, a rubber pad for buff fixing is attached to the tip of the polisher, and a wool buff for rough polishing (Meister Wool Buff made by Ishihara Chemical Co., Ltd.) is rubberized via Velcro tape (commonly known as Magic Tape <registered trademark>). It fixed to the pad made, and buffing (rough polishing process) was performed using the compound for rough polishing processes (FMC Meister 1 by Ishihara Chemical Co., Ltd.). Buffing is performed until there is no trace of Trecut Pink, and data on the number of revolutions, power consumption and torque of the polisher at that time are examined, and the state of the coating after buffing (paper residue, gun skin residue, gloss, 20 (Glossiness, 60 ° glossiness, DOI image clarity) were evaluated, and an appropriate torque value range for obtaining a good coating state was obtained.

Next, after replacing the wool buff for rough polishing process with a sponge buff for finishing process (Meister sponge buff made by Ishihara Chemical Co., Ltd.), buffing using a compound for finishing process (FMC Meister 2 made by Ishihara Chemical Co., Ltd.) Polishing (finishing process) was performed. Buffing (finishing process) is performed until the buffing (polishing mark by buffing) in the rough polishing process is eliminated and the finish is completed, and data on the number of revolutions, power consumption and torque of the polisher at that time are examined, and the coating film after buffing The state (buff remaining, gloss, 20 ° gloss, 60 ° gloss, DOI image clarity) was evaluated, and an appropriate torque value range for obtaining a good coating state was determined.

The coating state after buffing (20 ° glossiness, 60 ° glossiness, DOI image clarity) is gloss meter (Rhopoint IQ, manufactured by Rhopoint Instruments, UK)
Was used to evaluate. Glossiness is an index indicating the specular glossiness (gloss) defined by ISO 2813, and DOI image clarity is an index indicating the sharpness (0 to 100%) of an image reflected on the surface. It can be judged. In particular, DOI is useful because the smoothness of the coating film can be quantified, and the effect of smoothing the non-smooth coated skin (gun skin) before buffing by buffing can be confirmed numerically. .

An example of the electric single rotation polisher for buffing of the present invention is shown in FIG.
That is, in FIG. 13, 10 is a portable polisher according to the present invention. 10a is a main body of a portable polisher, and includes a prime mover such as an electric motor. The prime mover may be an electric motor or the like, or a turbine driven by compressed air. A handle 10 c is provided integrally with the main body 10.

The material of the main body and / or the handle may be a die-cast metal material such as aluminum, but may be a plastic material such as FRP resin or ABS resin.
Reference numeral 10e denotes an auxiliary handle for adjusting the torque of the pressing force. When the torque is small, a force is applied to the auxiliary handle 10e to adjust the torque by increasing or decreasing the torque. The mounting position of the auxiliary handle 10e may be attached at a position that intersects the handle 10c at a right angle. The auxiliary handle 10e is not essential and may be omitted.

Reference numeral 13 denotes a prime mover switch. The motor is rotated and stopped by turning the switch ON and OFF.
10f is a rotation output shaft of the portable polisher. A buff 12 is attached to the output shaft 10f via a rubber pad 10g so that the type of buff can be changed according to the buffing process. The rubber pad 10g and the buff 12 are fixed to each other via Velcro tape (commonly known as Velcro (registered trademark)) and can be freely detached.
Reference numeral 20 denotes instruments such as a torque meter and a tachometer, which are attached to an easily viewable portion of the portable polisher body. Instruments 20 such as a torque meter and a tachometer may be attached to an easily visible place such as a main handle of a portable polisher.
The measuring instruments 20 such as a torque meter and a tachometer may be analog type or digital type.

In an analog type torque meter, the indicator needle displays an appropriate range of torque, for example, is colored green, and is displayed in a color that gives a strong impression that the torque is appropriate.
In the digital type torque meter, when the indication number is in the proper range, in order to impress that it is appropriate, it blinks at a certain time or is displayed large so that it is strong. Impressive.
Normally, when polishing the surface of an automobile or the like with the portable polisher 10, hold the handle with one hand with the portable polisher and lightly press with the opposite hand while looking at the torque meter so that the torque meter is within the proper range , I will polish.
Instruments 20 such as a torque meter and a tachometer have an anti-glare film attached to the surface of the display device in order to prevent light from being reflected and becoming difficult to see.
By doing so, even if an automobile or the like is polished outside in a strong light environment, it is difficult to receive reflection of light, and buffing can be performed smoothly, which is very effective.
As a polisher, an electric single rotation polisher for buffing with a torque display was used, and the following experiment was conducted.

Conventionally, a rough polishing process was performed with a pressing force that would give good results empirically (polishing range: 30 cm × 30 cm, polisher moving speed: 10 cm / 3 sec), and the change in torque over time was measured. (FIG. 1) The average torque at this time was 5.64 N · m.

(Example 1) A rough polishing process was performed with a pressing force that seems to be slightly stronger (polishing range: 30 cm x 30 cm, polisher moving speed: 10 cm / 3 seconds), and the change in torque over time was measured. (FIG. 2) The average torque at this time was 6.39 N · m.

(Example 2) A rough polishing process was performed with a pressing force that is considered to be stronger (polishing range: 30 cm x 30 cm, polisher moving speed: 10 cm / 3 seconds), and a change in torque over time was measured. (FIG. 3) The average torque at this time was 6.98 N · m.

(Example 1) A rough polishing process was performed with a pressing force considered to be weaker (a polishing range of 30 cm x 30 cm, a polisher moving speed of 10 cm / 3 seconds), and a change in torque over time was measured. (FIG. 4) The average torque at this time was 4.17 N · m.

Conventionally, the finishing process was carried out with a pressing force that would give good results empirically (polishing range 30 cm × 30 cm, polisher moving speed 10 cm / 3 seconds), and the change in torque over time was measured. (FIG. 5) The average torque at this time was 6.43 N · m.

(Example 5) The finishing process was performed with a pressing force that seems to be slightly stronger (polishing range: 30 cm x 30 cm, polisher moving speed: 10 cm / 3 seconds), and the change in torque over time was measured. (FIG. 6) The average torque at this time was 7.44 N · m.

(Example 6) The finishing process was performed with a pressing force that seems to be even stronger (polishing range: 30 cm x 30 cm, polisher moving speed: 10 cm / 3 seconds), and the change in torque over time was measured. (FIG. 7) The average torque at this time was 8.33 N · m.

(Example 5) A finishing process was performed with a pressing force that seems to be weaker (a polishing range of 30 cm x 30 cm, a polisher moving speed of 10 cm / 3 seconds), and a change in torque over time was measured. (FIG. 8) The average torque at this time was 4.48 N · m.

(Comparative Example 1)
A rough polishing step was performed with a pressing force that seems to be too strong compared to (Example 1) (polishing range: 30 cm × 30 cm, polisher moving speed: 10 cm / 3 seconds), and the change in torque over time was measured. (FIG. 9) The average torque at this time was 9.12 N · m.

(Comparative Example 2)
A rough polishing process was performed with a pressing force that seems to be too weak compared to Example 1 (polishing range: 30 cm × 30 cm, polisher moving speed: 10 cm / 3 seconds), and changes in torque over time were measured. (FIG. 10) The average torque at this time was 2.35 N · m.

(Comparative Example 3)
The finishing process was carried out with a pressing force that seems to be too strong compared to (Example 5) (polishing range 30 cm × 30 cm, polisher moving speed 10 cm / 3 seconds), and the change with time of torque was measured. (FIG. 11) The average torque at this time was 9.91 N · m.

(Comparative Example 4)
The finishing process was performed with a pressing force that seems to be too weak compared to Example 5 (polishing range 30 cm × 30 cm, polisher moving speed 10 cm / 3 seconds), and the change with time of torque was measured. (FIG. 12) The average torque at this time was 1.90 N · m.
Table 1 shows the results.

（評価基準）
（１）ペーパー目残り：脱脂剤で表面の油分を除去した後、目視評価
○・・・ペーパー目は完全に残っていない
△・・・ペーパー目はわずかに残っている
×・・・ペーパー目は残っている
（２）バフ目残り：脱脂剤で表面の油分を除去した後、目視評価
○・・・バフ目は完全に残っていない
△・・・バフ目はわずかに残っている
×・・・バフ目は残っている
（３）ガン肌残り：目視評価
○・・・ガン肌は平滑になっている
△・・・ガン肌は少し平滑になっている
×・・・ガン肌はほとんど変化していない
（４）光沢：目視評価
○・・・光沢良好
△・・・光沢やや劣る
×・・・光沢不良
（５）２０°光沢度：光沢計（Ｒｈｏｐｏｉｎｔ ＩＱ）による評価
○・・・８０以上
△・・・７５〜８０
×・・・７５未満
（６）６０°光沢度：光沢計（Ｒｈｏｐｏｉｎｔ ＩＱ）による評価
○・・・８５以上
△・・・８０〜８５
×・・・８０未満
（７）ＤＯＩ（写像性）：光沢計（Ｒｈｏｐｏｉｎｔ ＩＱ）による評価
○・・・９５以上
△・・・９０〜９５
×・・・９０未満

(Evaluation criteria)
(1) Paper residue: After removing oil on the surface with a degreasing agent, visual evaluation
○ ・ ・ ・ The paper eyes are not completely left
△ ・ ・ ・ Slight paper remains
X: Paper remains (2) Buff remaining: Visual evaluation after removing oil on the surface with a degreasing agent
○ ... Buff eyes are not completely left
△ ・ ・ ・ Slight buff remains
× ・ ・ ・ Buff eyes remain (3) Cancer skin residue: Visual evaluation
○ ... Cancer skin is smooth
△ ... Cancer skin is a little smooth
X ... Cancer skin has hardly changed (4) Gloss: Visual evaluation
○ ... Good gloss
△ ・ ・ ・ Slightly inferior
X ... Poor glossiness (5) 20 ° glossiness: evaluation by glossometer (Rhopoint IQ)
○ ... 80 or more
△ ... 75-80
X: less than 75 (6) 60 ° glossiness: evaluation by gloss meter (Rhpoint IQ): o 85 or more
△ ... 80-85
X ... less than 80 (7) DOI (image clarity): evaluation by gloss meter (Rhpoint IQ) ○ ... 95 or more
△ ... 90-95
× ・ ・ ・ less than 90

The electric single rotary polisher having a torque display function used for buffing of a painted surface or the like of the present invention and the buffing method of working while observing the torque value using the same should be surely performed by a skilled craftsman. High-quality buffing work that could not be performed can be performed even by an inexperienced worker, so the industrial utility value is extremely high.

10 Polisher 10a Polisher body 10c Handle 10e Auxiliary handle 10f Output shaft 10g Rubber pad 12 Buff 13 Switch 20 Instruments (torque meter, tachometer, etc.)

Claims (4)

Electric single rotation polisher for buffing, where the buff of the electric single rotation polisher is pressed against the painted surface as the polishing surface using the electric single rotation polisher, and the polishing work per unit area to be buffed is managed while observing the torque value. A buffing method using a buffing electric single-rotation polisher, characterized in that the average value of torque values is 3.0 to 9.0 N · m.   An electric single rotation polisher for buffing used in the buffing method using the electric single rotation polisher for buffing according to claim 1, wherein the electric single rotation polisher for buffing has a torque value display function. Polisher.   3. The electric single rotary polisher for buffing according to claim 2, wherein the torque value display function is a display having analog, digital, or both at the same time.   The electric single rotary polisher for buffing according to claim 2 or 3, wherein the painted surface is an automotive painted surface.

Images