JPH0915170A - Measuring method of quantity of sticking powderlike material - Google Patents

Abstract

PURPOSE: To evaluate the quantity of sticking abrasive powder quantitatively and to control accurately the degree of the quantity of residue sticking in a preprocessing for joining with metal of a different kind or the same kind by a very simple method. CONSTITUTION: White and sufficiently clean cloth 2 is put on a polished wire material 1, in contact therewith, and a weight 3 is fitted to the cloth and hung down so that it be a prescribed pressing force. The cloth 2 is slid on the wire material 1 by a prescribed distance in this state and the surface of the wire material is wiped with the cloth. A residue of abrasive powder sticking on the surface of the wire material is made to stick inversely on the cloth side and thereby the cloth 2 is stained, the lightness thereof lowering. By representing the state of the stain by the lightness and by comparing this with the lightness of the cloth 2 before wiping, the quantity of the abrasive powder having stuck on the surface of the wire material is determined by a concrete numerical value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the amount of powdery substance adhered to the surface of a rigid substance, and more particularly to joining a filamentous body of different or similar metals. The present invention relates to a powdery substance adhesion amount measuring method suitable for an evaluation method of a polishing state after emery polishing performed as a treatment.

[0002]

2. Description of the Related Art When joining filaments of dissimilar or similar metals, it is common to mechanically polish and activate the surface of the filaments as a pretreatment. The inactive surface layer portion that has been shaved by becomes a polishing powder and remains attached to the surface of the linear body after polishing. If bonding such as extrusion coating or pressure welding is performed in this state, the active surfaces cannot contact each other at the portion where the abrasive powder is adhered, and the bonding strength is weakened accordingly. In order to obtain high bonding strength, removal of the polishing powder is indispensable, but it is impossible to evaluate whether the removal has been possible without a method of quantifying the amount of the polishing powder adhering to the surface of the linear body.

Conventionally, as a method for quantifying the amount of polishing powder,
(1) The surface of the striatum after polishing is magnified and photographed with a microscope and the amount of polishing powder is visually evaluated, (2) The polishing powder adhering to the surface of the striatum after polishing is removed, and There was a method of evaluating by the weight change before and after.

[0004]

However, the visual evaluation of the amount of polishing powder in (1) has a large difference among observers, and since it is an evaluation only in a narrow part of the range, it is a quantification method. Is unreliable.

Further, in the evaluation based on the weight change of (2), since the weight of the polishing powder is extremely small with respect to the weight of the linear body, it may fall within the range of measurement error, which is also unreliable. . Also, with this method, the polishing powder of a material with a small specific gravity is not in the order that can be read as a change in weight,
It is extremely inaccurate.

Incidentally, such a problem can be applied not only to the linear body but also to the quantification of any powdery substance attached to the surface of the rigid substance.

An object of the present invention is to solve the above-mentioned problems of the prior art and provide a highly reliable method for measuring the amount of powdery substance adhered. Further, the object of the present invention is to be able to evaluate the amount of abrasive powder adhered to the striatum by a specific numerical value, and to accurately control the degree of pretreatment for joining with dissimilar or similar metals by an extremely simple method. Another object of the present invention is to provide a method for measuring the amount of attached powdery substance that can be used.

[0008]

According to the method for measuring the amount of powdery substance adhered according to the present invention, the surface of a rigid substance to which the powdery substance is attached is covered with a cloth or a cloth having a large lightness difference with respect to the color of the powdery substance. It is wiped with an adhesive tape, and the degree of contamination with a powdery substance is measured from the brightness of the cloth or the adhesive tape after the wiping.

Further, the method for measuring the amount of adhered powdery substance according to the present invention is such that the surface of the filamentous body after polishing, which produces non-white type abrasive powder, is wiped with a white cloth or an adhesive tape, The degree of dirt due to polishing powder is measured from the brightness of the adhesive tape.

Further, the method for measuring the amount of adhered powdery substance according to the present invention is to wipe the surface of the filamentous body after polishing, which produces non-white type abrasive powder, with a white cloth or an adhesive tape, and The lightness of the adhesive tape is compared with the lightness of the cloth or the adhesive tape before being wiped, and the degree of contamination with the polishing powder is measured.

If a powdery substance other than white or abrasive powder is produced, a pure white cloth or adhesive tape is used. It is preferable to use a black cloth or adhesive tape. Further, it is preferable to use, as a measurement spot of a lightness meter for measuring lightness, one having a small spot diameter when it is thin and a large spot diameter when it is thick according to the dimensions of a rigid substance or a filament.

[0012]

[Function] By wiping the surface of the rigid body material with a cloth or an adhesive tape, the powdery substance remaining on the surface of the rigid body material is reversed and adhered to the cloth or the adhesive tape side, and the cloth or the adhesive tape is dirty by that much. The brightness drops. It is possible to quantify how much abrasive powder adhered to the surface of a rigid substance by expressing the degree of dirtiness with lightness and comparing it with the lightness of cloth or adhesive tape before wiping. Becomes

The cloth to be used may be of any type including exposure. Alternatively, it may be wet wiped with water. Also, the same effect can be obtained by using an adhesive tape instead of the cloth. The rigid material to be measured is a wire with a circular cross section,
The shape does not matter, such as a plate-shaped strip.

[0014]

EXAMPLE An example of measuring the amount of black abrasive powder adhering to the surface of the filament will be described below as an example of the present invention. The principle will be described before describing a specific example.

First, a sufficiently clean white cloth (for example, exposed) is prepared, and its brightness is measured. This value is assumed to be A. In the case of filaments that generate white polishing powder, prepare a black cloth.

After the polishing, the entire surface of the linear member having a circular cross section is wiped with the above-mentioned white cloth. At this time, the size of the cloth, the pressing force of the cloth against the filament, and the length of the filament to be wiped are unchanged in all measurements. The brightness of the cloth after being wiped off is measured, and the value is defined as B.

The ratio of B to A (B / A) is the polishing powder removal rate (complete removal when B / A = 1), and the polishing powder adhesion residual rate is 1-B / A ( When = 0, there is no residual adhesion).

When a black cloth is used in the case of a linear body in which white polishing powder is generated, the polishing powder removal rate is A / B with the brightness A before wiping and the brightness B after wiping. The polishing powder adhesion residual rate can be similarly evaluated by using 1-A / B.

Next, a specific example will be described.

FIG. 1 shows a method of collecting the black polishing powder remaining on the surface of the wire 1 having a round cross section after polishing. A sufficiently clean white cloth 2 is folded and put on the polished linear body 1 so that the cloth 2 comes into contact with the linear body 1. The lower end is fitted with a metal fitting 5 and a weight 3 is hung and hung so as to obtain a constant pressing force. In this state,
The cloth 2 is slid on the filament 1 by a certain distance. In addition,
The position of the cloth 2 may be fixed and the filament 1 may be moved.

As shown in FIG. 2, the cloth 2 after the polishing powder is collected in this manner is soiled in black by the polishing powder. The brightness of this soiled part is measured with a brightness meter. On this occasion,
The spot diameter of the measurement spot 4 and the light meter is selected while paying attention so that a clean white area does not enter the measurement spot 4.

Based on the lightness thus measured and the lightness of the white cloth before sampling, the remaining amount of polishing powder adhered can be quantified by using the above-mentioned formula.

Now, in order to confirm the evaluation power of this embodiment, a quantification experiment of the remaining amount of polishing powder adhered was conducted on the following polishing samples.

(Sample) φ6.6 steel wire: 1 m (polishing condition) Polished once with each emery cloth of # 40, # 80, # 120, # 240, # 400 (cloth used) exposed to white contact Length = 50 mm (pressing force) 100 g weight (lightness meter) Minolta CR-200 (spot diameter = 8 mm) FIG. 3 shows the results of quantification. The vertical axis is the polishing powder adhesion residual rate,
The horizontal axis represents the mesh of polished emery cloth. It is clear that the adhered amount of the polishing powder can be quantified, and it can be seen that the adhered amount is larger in the case of polishing with rough emery.

As described above, according to this embodiment, the amount of the polishing powder adhering and remaining on the surface of the linear body after polishing is evaluated as a concrete numerical value by using the stain lightness of the wiped white cloth. Therefore, accurate quantification is possible at extremely low cost. Further, this makes it possible to evaluate the removal of the polishing powder adhered and remaining on the surface of the linear body, so that a high bonding strength can be obtained when the linear bodies of different or similar metals are bonded.

Further, for example, if the quantification step according to the present embodiment is incorporated immediately after the step of removing surface stains such as polishing powder in the line, the quantification step according to the present embodiment can be removed by simply setting the threshold value of the remaining amount of adhesion. Process abnormalities can be detected. further,
In the quantification method of this embodiment, since the polishing powder is collected, it can be used as the polishing powder removing step itself.

In the above-described embodiment, the linear strip having a circular cross section is applied, but the present invention can also be applied to a plate-shaped strip. FIG. 4 shows a method of collecting abrasive powder in the case of the plate-shaped strip 6. The white cloth 2 is placed on the plate-shaped strip 6 and brought into contact therewith, and the weight 3 is placed thereon to move the white cloth 2 relative to the plate-shaped strip 6. Also by this, the same effect as in the case of the linear body having a circular cross section can be obtained.

The method of the present invention is not limited to polishing powder,
It can be used to quantify any powdered material that adheres to the surface of a rigid material. For example, it can be used for quantifying dirt on guide rolls and pulleys in contact with a traveling wire rod, and quantifying dirt on floors.

[0029]

EFFECTS OF THE INVENTION According to the present invention, the amount of powdery substances remaining on the surface of a rigid substance can be quantitatively evaluated by using the lightness of dirt on a wiped cloth or adhesive tape. Can be highly evaluated.

According to the present invention, the amount of polishing powder adhering and remaining on the surface of a linear body after polishing can be evaluated as a concrete numerical value by using the brightness of stains on a wiped white cloth or adhesive tape. Therefore, accurate quantification is possible as compared with the conventional method in which the amount of adhesion is evaluated by human eyes. Therefore, the degree of pretreatment for joining different or similar metals
It can be managed at low cost and accurately in a very simple way.

According to the present invention, the lightness of the cloth or adhesive tape after wiping the surface of the filamentous body is compared with the lightness of the cloth or adhesive tape before wiping to measure the degree of contamination with the polishing powder. , More accurate quantification is possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method for collecting abrasive powder of a wire having a circular cross section for explaining an embodiment of a method for measuring an amount of attached powdery substance of the present invention.

FIG. 2 is an explanatory diagram showing stains on a cloth after collection according to the present embodiment and a measurement unit.

FIG. 3 is a graph showing the results of an experiment for quantifying the residual amount of polishing powder adhered according to this example.

FIG. 4 is an explanatory diagram of a method for collecting abrasive powder from a plate-shaped strip for explaining another embodiment of the present invention.

[Explanation of symbols]

 1 Striation (rigid substance) 2 Cloth 3 Weight 6 Plate-shaped strip

Claims (3)

[Claims] 1. A surface of a rigid body to which a powder substance is attached is wiped with a cloth or an adhesive tape having a color having a large lightness difference with respect to the color of the powder substance, and the cloth or the adhesive tape is wiped. A method for measuring the amount of powdery substance adhered, which measures the degree of contamination by powdery substance from brightness. 2. A non-white type polishing powder is generated, the surface of the linear body after polishing is wiped with a white cloth or an adhesive tape, and the degree of contamination with the polishing powder is measured from the brightness of the wiped cloth or the adhesive tape. A method for measuring the amount of attached powdery substances. 3. The surface of the striatum after polishing, which produces non-white type polishing powder, is wiped with a white cloth or adhesive tape, and the brightness of the cloth or adhesive tape after wiping is adjusted to A method for measuring the amount of powdery substances adhered, which measures the degree of dirtiness caused by polishing powder, as compared to the brightness of an adhesive tape.