JP7472057B2 - Film thickness control device - Google Patents

Description

The present invention relates to a film thickness control device.

For example, contact testing is performed on mechanical parts such as ship crankshafts to determine the smoothness of the sliding surfaces. This contact testing is performed using a measuring tool with a reference surface that serves as a model for the smoothness of the sliding surface. In this contact testing, paint is applied to the reference surface, and the paint is transferred to the sliding surface by pressing the reference surface against the sliding surface, and the smoothness of the sliding surface is determined based on the transfer rate of the paint.

As a method for accurately measuring the paint transfer rate during contact testing, a method has been proposed in which the paint adhesion state of the sliding surface is photographed from multiple different directions using a digital camera (see JP 2016-133918 A).

JP 2016-133918 A

Patent document 1 describes how multiple images captured by a digital camera are expanded into multiple planar images of the same scale, and the expanded images are used to complement the halation areas, making it possible to calculate the hit area ratio relatively accurately.

However, even when this technology is used, if the thickness of the paint applied to the reference surface of the measuring tool is not properly controlled, it is difficult to accurately determine the smoothness of the sliding surface. In other words, if the thickness of the paint applied to the reference surface is not uniform, uneven paint transfer occurs, and the smoothness of the sliding surface and the paint transfer rate do not correspond.

The present invention was made in consideration of these circumstances, and aims to provide a film thickness control device that can easily and appropriately control the film thickness of paint applied to a reference surface.

The film thickness control device according to one aspect of the present invention is a film thickness control device that controls the film thickness of a paint on a measuring tool that has a long reference surface that serves as a standard for the smoothness of the sliding surface of a workpiece, and that can measure the contact area ratio of the sliding surface by transferring the paint applied to this reference surface to the sliding surface. The device is equipped with a support part that has an abutment surface against which the reference surface abuts, and that supports the measuring tool so that it can slide along the longitudinal direction of the reference surface, and a pair of guide parts that guide the measuring tool from both sides in the width direction of the reference surface, and a groove that has a depth corresponding to the target film thickness of the paint and extends in the sliding direction of the measuring tool is formed on the abutment surface.

The film thickness control device according to one aspect of the present invention can easily and appropriately control the film thickness of the paint applied to the reference surface.

FIG. 1 is a schematic perspective view showing a film thickness control device according to one embodiment of the present invention. FIG. 2 is a schematic bottom view of the film thickness control device of FIG. FIG. 3 is a schematic perspective view showing the measuring tool before the paint film thickness is controlled using the film thickness control device of FIG. FIG. 4 is a cross-sectional view of the film thickness control device taken along line IV-IV of FIG. FIG. 5 is a schematic front view of the film thickness control device of FIG. 1 with the measuring tool of FIG. 3 disposed thereon. FIG. 6 is a schematic perspective view showing a procedure for controlling the film thickness using the film thickness control device of FIG. 7 is a schematic perspective view showing the state of the measuring tool of FIG. 3 after the paint film thickness has been controlled by the film thickness control device of FIG. 1. FIG. FIG. 8 is a schematic diagram showing a state in which paint has been transferred to the sliding surface using the measuring tool shown in FIG.

[Description of the embodiments of the present invention]
First, the embodiments of the present invention will be listed and described.

The film thickness control device according to one aspect of the present invention is a film thickness control device that controls the film thickness of a paint on a measuring tool that has a long reference surface that serves as a standard for the smoothness of the sliding surface of a workpiece, and that can measure the contact area ratio of the sliding surface by transferring the paint applied to this reference surface to the sliding surface. The device is equipped with a support part that has an abutment surface against which the reference surface abuts, and that supports the measuring tool so that it can slide along the longitudinal direction of the reference surface, and a pair of guide parts that guide the measuring tool from both sides in the width direction of the reference surface, and a groove that has a depth corresponding to the target film thickness of the paint and extends in the sliding direction of the measuring tool is formed on the abutment surface.

The film thickness control device has a groove formed on the contact surface with which the reference surface contacts, the groove having a depth corresponding to the target film thickness of the paint and extending in the sliding direction of the measuring tool. Therefore, by sliding the measuring tool in the longitudinal direction of the reference surface while guiding the measuring tool from both sides in the width direction of the reference surface with the pair of guide parts, the film thickness of the paint applied to the reference surface can be easily and appropriately controlled.

The film thickness control device may further include a spacing adjustment mechanism that adjusts the spacing between the pair of guide portions according to the width of the measuring tool. In this way, the film thickness control device can control the paint film thickness for measuring tools of different sizes by including a spacing adjustment mechanism that adjusts the spacing between the pair of guide portions according to the width of the measuring tool.

It is preferable that the spacing adjustment mechanism has an elastic body capable of biasing the pair of guide parts so as to bring them closer to each other. In this way, by having the spacing adjustment mechanism have an elastic body capable of biasing the pair of guide parts so as to bring them closer to each other, the spacing between the pair of guide parts can be automatically and easily adjusted to match the width of the measuring tool.

The spacing adjustment mechanism may adjust the spacing between the pair of guide parts so that the groove is located at the center of the width of the reference surface. In this way, the spacing adjustment mechanism adjusts the spacing between the pair of guide parts so that the groove is located at the center of the width of the reference surface, thereby making it possible to position paint with a controlled film thickness at the center of the width of the reference surface. As a result, the paint can be easily transferred to the sliding surface.

The pair of guide parts may have a pair of opposing surfaces that face each other, and a feed mechanism that assists the sliding of the measuring tool may be provided on the pair of opposing surfaces. In this way, the pair of guide parts may have a pair of opposing surfaces that face each other, and a feed mechanism that assists the sliding of the measuring tool may be provided on the pair of opposing surfaces, so that a coating film having a desired film thickness and width can be easily formed on the reference surface of the measuring tool.

[Details of the embodiment of the present invention]
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate.

[Film thickness control device]
The film thickness control device 10 shown in Fig. 1 to Fig. 3 controls the film thickness of the paint P applied on the reference surface 110 of the measuring tool 100 having an elongated reference surface 110 as shown in Fig. 4. More specifically, the film thickness control device 10 has an elongated reference surface 110 that serves as a standard for the smoothness of the sliding surface (not shown) of the workpiece, and controls the film thickness of the paint P in the measuring tool 100 that can measure the contact area ratio of the sliding surface by transferring the paint P applied to the reference surface 110 to the sliding surface. The workpiece is not particularly limited, but an example of the workpiece is a crankshaft used in a ship. When the workpiece is a crankshaft, an example of the sliding surface is a peripheral surface of a pin, a journal, or the like. The measuring tool 100 has a reference surface 110 and a pair of side surfaces 120 that are arranged perpendicular to the reference surface 110 and face each other, and a straight edge can be used, for example.

The film thickness control device 10 includes a support section 1 that supports the measuring tool 100 so that it can slide in the longitudinal direction of the reference surface 110, and a pair of guide sections 2 that guide the measuring tool 100 from both sides in the width direction of the reference surface 110. The film thickness control device 10 also includes a distance adjustment mechanism 3 that adjusts the distance between the pair of guide sections 2 to match the width of the measuring tool 100 (the distance between the pair of side surfaces 120), and a pair of grip sections 4 that are arranged on the outer sides of the pair of guide sections 2 in the opposing direction.

(Support part)
The support part 1 has an abutment surface 11 against which the reference surface 110 abuts. The abutment surface 11 has a groove 11a formed thereon, the groove 11a having a depth corresponding to the target film thickness of the paint and extending in the sliding direction of the measuring tool 100. More specifically, the abutment surface 11 has the groove 11a and a pair of support surfaces 11b disposed on both sides of the groove 11a and extending parallel to the groove 11a. The support part 1 is roughly rectangular parallelepiped in which the extension direction of the groove 11a is the longitudinal direction and the width direction of the groove 11a is the width direction. The groove 11a penetrates the support part 1 in the longitudinal direction. The support part 1 controls the film thickness and width of the paint P applied to the reference surface 110 of the measuring tool 100 by sliding the measuring tool 100 on the pair of support surfaces 11b. 5 and 6, the coating thickness control device 10 regulates the coating thickness and width of the coating P applied to the reference surface 110 to the size of the groove 11a by sliding the measuring tool 100 on the pair of support surfaces 11b in a state in which the coating P is applied to the entire surface of the reference surface 110 (hereinafter, the coating whose coating thickness and width are regulated by passing through the groove 11a is also referred to as "coating film P1"). Note that the average coating thickness of the coating P applied to the reference surface 110 is preferably equal to or greater than the depth of the groove 11a.

The groove 11a is preferably provided in the center of the width of the contact surface 11. With this configuration, as shown in FIG. 7, it is easy to form a line-shaped coating film P1 in the center of the width of the reference surface 110 of the measuring tool 100. As a result, the coating film P1 can be easily transferred to the sliding surface.

The depth D and width W1 of the groove 11a (see FIG. 5) can be set according to the degree of smoothness required for the sliding surface. It is preferable that the depth D and width W1 of the groove 11a are uniform. The lower limit of the depth D of the groove 11a can be, for example, 1 μm, and may be 2 μm. On the other hand, the upper limit of the depth D of the groove 11a can be, for example, 10 μm, and may be 5 μm. Also, the lower limit of the width W1 of the groove 11a can be, for example, 1 mm, and may be 3 mm. On the other hand, the upper limit of the width W1 of the groove 11a can be, for example, 15 mm, and may be 10 mm.

As shown in FIG. 5, the lower limit of the ratio (W1/W2) of the width W1 of the groove 11a to the width W2 of the measuring tool 100 is preferably 0.1, more preferably 0.2. On the other hand, the upper limit of the ratio (W1/W2) is preferably 0.6, more preferably 0.5. If the ratio (W1/W2) is less than the lower limit, the width of the coating film P1 becomes too small relative to the width of the reference surface 110, which may reduce the efficiency of the work of transferring the coating film P1 to the sliding surface. Conversely, if the ratio (W1/W2) exceeds the upper limit, there is a risk that a part of the measuring tool 100 may get stuck in the groove 11a when the measuring tool 100 is slid on the contact surface 11.

As shown in FIG. 5, the support portion 1 has a pair of abutment surfaces 11 on both sides in the thickness direction (the vertical direction in FIG. 5). The film thickness control device 10 may vary one or both of the depth and width of the groove 11a between the pair of abutment surfaces 11, for example. With this configuration, the grooves 11a can be used differently depending on the smoothness required for the sliding surface.

(Guide section)
The pair of guide parts 2 are disposed so as to sandwich the support part 1 from both sides in the width direction. Each of the pair of guide parts 2 is plate-shaped. The pair of guide parts 2 have a pair of opposing surfaces 2a that face each other.

The pair of guide parts 2 are configured to be able to position the measuring tool 100 on the contact surface 11 by pressing a pair of side surfaces 120 of the measuring tool 100 from the outside. Specifically, the pair of guide parts 2 are configured to be able to position the measuring tool 100 on the contact surface by being biased inward in the opposing direction by the spacing adjustment mechanism 3 described below.

The pair of guide parts 2 have a feed mechanism 12 on the pair of opposing surfaces 2a that assists in sliding the measuring tool 100. By having the feed mechanism 12 on the pair of guide parts 2, a coating film P1 having the desired film thickness and width can be easily formed on the reference surface 110.

The specific configuration of the feed mechanism 12 is not particularly limited, and may be a bearing, a roller that rotates in the sliding direction, or the like (bearings are illustrated in FIG. 1, etc.). It is also possible to provide a sliding layer to improve the slipperiness of the pair of opposing surfaces 2a, allowing it to function as the feed mechanism 12.

(Spacing adjustment mechanism)
The gap adjustment mechanism 3 adjusts the gap between the pair of guide parts 2 so as to correspond to the width of the measuring tool 100. By including the gap adjustment mechanism 3, the film thickness control device 10 can control the film thickness and width of the paint P for measuring tools 100 of different sizes.

The spacing adjustment mechanism 3 has an elastic body 3a that can bias the pair of guide parts 2 so that they approach each other. A spring member or the like is used as the elastic body 3a. The spacing adjustment mechanism 3 has the elastic body 3a, so that the spacing between the pair of guide parts 2 can be automatically and easily adjusted to match the size of the measuring tool 100. More specifically, by utilizing the repulsive force of the elastic body 3a, the spacing between the pair of guide parts 2 can be adjusted to match the width of the measuring tool 100, and the pair of guide parts 2 can press the measuring tool 100 appropriately from both sides.

The spacing adjustment mechanism 3 preferably adjusts the spacing between the pair of guide parts 2 so that the groove 11a is located at the center of the width of the reference surface 110 of the measuring tool 100. The spacing adjustment mechanism 3 can, for example, position an elastic body 3a with equal repulsive force between the support part 1 and the pair of guide parts 2, and with the measuring tool 100 positioned between the pair of guide parts 2, urge the pair of guide parts 2 toward each other using this elastic body 3a, thereby positioning the groove 11a at the center of the width of the reference surface 110. With this configuration, the coating film P1 after film thickness control by the film thickness control device 10 can be easily transferred to the sliding surface.

The elastic bodies 3a are preferably arranged at positions that face each other in the width direction of the support part 1. In addition, the elastic bodies 3a are preferably arranged on the upstream side and downstream side of the sliding direction of the measuring tool 100.

(Grip portion)
The pair of gripping parts 4 are disposed on the outer side of the pair of guide parts 2 in the opposing direction. As shown in Fig. 3, the pair of gripping parts 4 are supported by elastic bodies 4a, 4b from the inner side in the opposing direction so that they can move in the opposing direction. With this configuration, the distance between the pair of gripping parts 4 is configured to be adjustable in accordance with the distance between the pair of guide parts 2. As a result, the film thickness control device 10 makes it easy to slide the measuring tool 100 in a desired direction.

<Advantages>
The film thickness control device 10 has a groove 11a formed on the abutment surface 11 with which the reference surface 110 abuts, the groove 11a having a depth corresponding to the target film thickness of the paint P and extending in the sliding direction of the measuring tool 100.Therefore, by guiding the measuring tool 100 from both sides in the width direction of the reference surface 110 by a pair of guide portions 2 while sliding the measuring tool 100 in the longitudinal direction of the reference surface 110, the film thickness of the paint P applied to the reference surface 110 can be easily and appropriately controlled.

The film thickness control device 10 can easily control the film thickness and width of the coating film P1 formed on the measuring tool 100. As a result, as shown in FIG. 8, it is possible to suppress the occurrence of transfer unevenness when the coating film P1 formed on the measuring tool 100 is transferred to the sliding surface 200. As a result, it is possible to accurately measure the contact area ratio of the sliding surface 200.

[Other embodiments]
The above-mentioned embodiment does not limit the configuration of the present invention. Therefore, the above-mentioned embodiment may omit, replace or add components of each part of the above-mentioned embodiment based on the description in this specification and common technical knowledge, and it should be understood that all of these are within the scope of the present invention.

In the above embodiment, the support portion has a groove on each side in the thickness direction. However, the support portion may have the groove on only one side in the thickness direction.

If the size of the measuring tool used is fixed, the film thickness control device does not need to be equipped with a spacing adjustment mechanism for adjusting the spacing between a pair of guide parts.

Even if the film thickness control device includes the gap adjustment mechanism, the specific configuration of the gap adjustment mechanism is not particularly limited. For example, the gap adjustment mechanism may be configured to adjust the gap between the pair of guide parts using a screw member. In addition, the gap adjustment mechanism may be configured to adjust only the gap between the support part and one of the guide parts.

The film thickness control device may also be configured so that the above-mentioned feed mechanism is not provided on the opposing surfaces of the pair of guide sections.

As described above, the film thickness control device according to one aspect of the present invention is suitable for controlling the film thickness of paint applied to the reference surface of a measuring tool.

1 Support part 2 Guide part 2a Opposing surface 3 Distance adjustment mechanism 3a Elastic body 4 Grip part 4a Elastic body 4b Elastic body 10 Film thickness control device 11 Contact surface 11a Groove 11b Support surface 12 Feed mechanism 100 Measuring tool 110 Reference surface 120 Side surface 200 Sliding surface P Paint P1 Coating film D Groove depth W1 Groove width W2 Width of measuring tool

Claims (5)

A film thickness control device for controlling a film thickness of a paint in a measuring tool having a long reference surface serving as a standard for the smoothness of a sliding surface of a workpiece, the film thickness control device being capable of measuring a contact area ratio of the sliding surface by transferring a paint applied to the reference surface to the sliding surface,
a support portion having a contact surface against which the reference surface contacts, the support portion supporting the measuring tool so as to be slidable along a longitudinal direction of the reference surface;
a pair of guide portions that guide the measuring tool from both sides in the width direction of the reference surface;
A film thickness control device in which a groove is formed on the contact surface, the groove having a depth corresponding to the target film thickness of the paint and extending in the sliding direction of the measuring tool. The film thickness control device according to claim 1, further comprising a spacing adjustment mechanism that adjusts the spacing between the pair of guide parts according to the width of the measuring tool. The film thickness control device according to claim 2, wherein the gap adjustment mechanism has an elastic body capable of biasing the pair of guide parts so as to approach each other. The film thickness control device according to claim 2 or 3, wherein the distance adjustment mechanism adjusts the distance between the pair of guide parts so that the groove is positioned at the center of the width of the reference surface. The pair of guide portions have a pair of opposing surfaces opposed to each other,
The film thickness control device according to any one of claims 1 to 4, wherein a feed mechanism for assisting the sliding of the measuring tool is provided on the pair of opposing surfaces.

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