Wipers for machine tools

Abstract

To provide a machine tool wiper that can reduce sliding resistance compared to conventional wipers. [Solution] The machine tool wiper 1 comprises an elastic plate 3 made of an elastic material laminated on a reinforcing plate 2, an elastic neck portion 4 integrally formed at the end of the elastic plate 3 with a width W3 smaller than the width W1 of the elastic plate 3, and a lip portion 6a integrally formed at the end of the elastic neck portion 4 with a lip base end surface 5a width W4 larger than the elastic neck portion 4. The lip portion 6a has fiber forming portions 8 made of a fibrous material provided on both sides of the opposing lip sides 5d, 5e and on the lip tip surface 5c.

Description

Technical Field

[0001] The present invention relates to a wiper for machine tools.

Background Art

[0002] Conventionally, wipers for machine tools are used to prevent foreign matter such as cutting chips from being caught in the sliding surfaces of machine tools such as lathes and milling machines (for example, Patent Document 1). A wiper for machine tools reciprocates relative to the sliding surfaces such as the machine base surface and cover surface of a machine tool, so that the lip portion removes foreign matter such as cutting chips adhering to the sliding surfaces.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of Invention

Problem to be Solved by the Invention

[0004] However, since the lip portion of the wiper for machine tools is formed of an elastic material, there is a problem that when the wiper is reciprocated in a state where the lip portion is strongly pressed against the sliding surface in a dry environment, the friction with the sliding surface increases and the sliding resistance becomes large.

[0005] Accordingly, an object of the present invention is to provide a wiper for machine tools that can reduce sliding resistance more than conventional ones.

Means for Solving the Problem

[0006] The machine tool wiper according to the present invention is a machine tool wiper that is attached to a machine tool, comprising: a reinforcing plate made of a rigid material; an elastic plate made of an elastic material laminated on the reinforcing plate; an elastic neck portion made of the elastic material, integrally formed at the end of the elastic plate and having a width smaller than the width of the elastic plate; and a lip portion having a lip base end surface integrally formed at the end of the elastic neck portion, the width of which is greater than that of the elastic neck portion, wherein the lip portion has fiber forming portions made of a fibrous material provided on both sides of the opposing lip sides and on the lip tip surface. [Effects of the Invention]

[0007] According to the present invention, by making the fiber-forming portion come into contact with the sliding surface, the sliding resistance can be reduced compared to the conventional configuration in which the lip portion is formed only of an elastic material. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing the configuration of a machine tool wiper according to the first embodiment. [Figure 2] This is a front view showing what happens when a machine tool wiper is pressed against a sliding surface. [Figure 3] The following are front cross-sectional views showing the front cross-sectional configuration of the lip portion according to another embodiment: 3A is a front cross-sectional view showing a front cross-sectional configuration in which a fiber-forming portion is formed throughout the entire interior of the lip portion; 3B is a front cross-sectional view showing the front cross-sectional configuration of the fiber-forming portion that is recessed toward the central axis side of the lip portion; and 3C is a front cross-sectional view showing the front cross-sectional configuration of the fiber-forming portion according to another embodiment that is recessed toward the central axis side of the lip portion. [Figure 4] This is a front cross-sectional view showing the front cross-sectional configuration of the lip portion according to the second embodiment. 4A is a front cross-sectional view showing a front cross-sectional configuration in which layered fiber-forming portions are formed on the lip side surface and lip tip surface. 4B is a front cross-sectional view showing a front cross-sectional configuration in which layered fiber-forming portions are formed on the entire surface of the lip side surface. 4C is a front cross-sectional view showing a front cross-sectional configuration in which layered fiber-forming portions are also formed on the lip base end surface. [Figure 5]The following are front cross-sectional views showing the front cross-sectional configuration of the lip portion according to another embodiment: 5A is a front cross-sectional view showing a front cross-sectional configuration in which a layered fiber-forming portion is embedded in the lip side surface; 5B is a front cross-sectional view showing a front cross-sectional configuration in which a layered fiber-forming portion is formed on the entire surface of the lip side surface; and 5C is a front cross-sectional view showing a front cross-sectional configuration in which a layered fiber-forming portion is formed on a part of the lip side surface and on the lip tip surface. [Figure 6] These are schematic diagrams illustrating the pressure applied to the sliding surface of a machine tool wiper. 6A shows the state when the machine tool wiper is pressed 1 mm, 6B shows the state when the machine tool wiper is pressed 3 mm, and 6C shows the state when the machine tool wiper is pressed 5 mm. [Figure 7] 7A is a graph showing the average value of the maximum static friction coefficient when the pressure is 2 mm, 7B is a graph showing the average value of the dynamic friction coefficient when the pressure is 2 mm, 7C is a graph showing the average value of the maximum static friction coefficient when the pressure is 5 mm, and 7D is a graph showing the average value of the dynamic friction coefficient when the pressure is 5 mm. [Figure 8] This table shows the results for durability and wear. [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same reference numerals are used for identical components, and redundant descriptions are omitted.

[0010] <First Embodiment> (1) Configuration of a wiper for machine tools As shown in Figure 1, the machine tool wiper 1 comprises a reinforcing plate 2, an elastic plate 3, an elastic neck portion 4, and a lip portion 6a. The machine tool wiper 1 is attached to a machine tool (not shown) such that the lip portion 6a reciprocates relative to the sliding surface of the machine tool, such as the machine base surface, cover surface, or door portion (in the x-axis direction in the figure). In Figure 1, the z-axis direction indicates the height direction of the machine tool wiper 1, the x-axis direction perpendicular to the z-axis direction indicates the width direction of the machine tool wiper 1, and the y-axis direction perpendicular to both the x-axis and z-axis directions indicates the longitudinal direction of the machine tool wiper 1.

[0011] The reinforcing plate 2 is formed in a plate shape, with its longitudinal direction extending in the y-axis direction. The reinforcing plate 2 is formed from a rigid material such as a metal plate or a resin plate. Examples of metal plates include steel plates, aluminum plates, brass plates, and tungsten plates. Examples of resin plates include fluororesins, super engineering plastics such as polyetheretherketone, and polyethylene terephthalate compounded with glass short fibers and inorganic fillers.

[0012] The elastic plate 3 is made of an elastic material and is laminated on the reinforcing plate 2. Examples of elastic materials for the elastic plate 3 include natural rubber, nitrile rubber, chloroprene rubber, Hypalon, polybutadiene rubber, ethylene-propylene rubber (EPM), ethylene-propylene-diene ternary copolymer (EPDM), hydrogenated acrylonitrile butadiene rubber (H-NBR), silicone rubber, fluororubber, acrylic rubber, styrene-butadiene rubber, chlorinated polyethylene rubber, millable urethane, thermosetting polyurethane, thermoplastic polyurethane, or thermoplastic polyester elastomers, and it is preferable that one or more of these be used. The elastic material may be compounded with a vulcanizing agent, a vulcanization accelerator, and a reinforcing agent. Examples of vulcanizing agents include organic peroxides such as dicumyl peroxide, organic sulfur compounds, and metal oxides. Examples of vulcanization accelerators include fatty acids such as stearic acid and metal oxides. Examples of reinforcing agents include carbon black and white carbon. Furthermore, other substances such as antioxidants, fillers, plasticizers, and adhesives may also be incorporated.

[0013] The elastic plate 3 is formed in a plate shape, and a strip-shaped reinforcing plate housing portion 3a is provided on one side. The reinforcing plate 2 is housed within the reinforcing plate housing portion 3a. The reinforcing plate 2 is provided in the reinforcing plate housing portion 3a such that it does not protrude from the side surface of the elastic plate 3. An elastic neck portion 4 is integrally formed at the end of the elastic plate 3. The elastic neck portion 4 is molded together with the elastic plate 3 and is made of the same elastic material as the elastic plate 3.

[0014] The elastic neck portion 4 is formed with a width W3 in the x-axis direction smaller than the width W1 of the elastic plate 3. The center of the elastic neck portion 4 is located near the center of the elastic plate 3 and is recessed from both sides of the elastic plate 3. In front view, the elastic neck portion 4 is formed with a quadrilateral cross-section, and its longitudinal direction extends along the elastic plate 3 in the y-axis direction. For example, the height H4 of the elastic neck portion 4 is about 0.7 to 1.3 [mm] and the width W3 is about 0.7 to 1.3 [mm], but these dimensions may be various other dimensions.

[0015] A lip portion 6a is integrally formed at an end of the elastic neck portion 4. The lip portion 6a is formed such that a width W4 in the x-axis direction on the lip base end surface 5a is larger than a width W3 of the elastic neck portion 4. The lip portion 6a is formed in an inverted trapezoidal cross-sectional shape in front view, and the longitudinal direction thereof extends in the y-axis direction along the elastic neck portion 4. The lip portion 6a has a lip base end surface 5a integrally formed on the elastic neck portion 4, a lip tip end surface 5c disposed to face the lip base end surface 5a, and opposing lip side surfaces 5d and 5e. The lip base end surface 5a is formed to have a width W4 larger than the width of the lip tip end surface 5c. It is preferable that the central portion of the lip base end surface 5a is integrally formed near the central portion of the end of the elastic neck portion 4.

[0016] The lip tip end surface 5c is formed to have a width smaller than the width W4 of the lip base end surface 5a, and the central portion thereof is disposed on the central line of the lip base end surface 5a. The lip side surfaces 5d and 5e are formed to be inclined in a tapered manner from the end of the lip base end surface 5a to the end of the lip tip end surface 5c.

[0017] The lip portion 6a according to the present embodiment includes a lip elastic portion 7 and a fiber forming portion 8. The lip elastic portion 7 is formed on the lip base end surface 5a side, and the fiber forming portion 8 is formed on the lip tip end surface 5c side. The lip elastic portion 7 is molded together with the elastic plate 3 and the elastic neck portion 4, and is formed of the same elastic material as the elastic plate 3 and the elastic neck portion 4. In the present embodiment, the lip elastic portion 7 is formed to a position spaced a predetermined distance from the lip base end surface 5a toward the lip tip end surface 5c side. FIG. 1 shows an example in which the lip elastic portion 7 is formed in an inverted trapezoidal cross-sectional shape in front view, and shows an example in which the joint surface 5b between the lip elastic portion 7 and the fiber forming portion 8 is formed in a substantially planar shape. In the lip portion 6a, a region of about 1 / 10 to 5 / 10 from the lip base end surface 5a in the entire region of the lip portion 6a may be the lip elastic portion 7.

[0018] The fiber forming portion 8 is formed of a fiber material, which may be formed solely of the fiber material, or may be formed of a fiber material containing an elastic material. The fiber forming portion 8 is formed from both of the lip side surfaces 5d and 5e up to the central axis C of the lip portion 6a. The "central axis C of the lip portion 6a" refers to the central axis C extending in the height direction passing through the center of the lip portion 6a. The central axis C is illustrated only in Fig. 1, and illustration thereof is omitted in other drawings. Further, in the present embodiment, the fiber forming portion 8 is formed over the entire interior from a predetermined height position on the lip side surfaces 5d, 5e to the lip tip surface 5c. Since the fiber forming portion 8 is joined at the joint surface 5b with the lip elastic portion 7, which is larger than the area of the portion where the elastic neck portion 4 is joined to the lip base end surface 5a, the joining strength with the lip elastic portion 7 can be increased as compared with the case of joining with the elastic neck portion 4.

[0019] The elastic material contained in the fiber material may be an elastic material different from the elastic material forming the lip elastic portion 7, but is preferably the same elastic material as the elastic material forming the lip elastic portion 7. The fiber material is preferably a fabric such as a woven fabric, a knitted fabric, or a nonwoven fabric. The woven fabric includes canvas. Examples of fibers constituting the woven fabric, nonwoven fabric or knitted fabric include synthetic fibers such as aliphatic polyamide fibers, aromatic polyamide fibers, aramid fibers, polyester fibers, urethane fibers, acetate fibers, and fluorine fibers, natural fibers such as cotton, silk, and hemp, rayon, glass fibers, and metal fibers with relatively low hardness. These exemplified fibers can be used singly or as a mixture of two or more kinds. Further, various materials such as lace fabric, leather fabric, PVC fabric, fur fabric, and punch needle fabric may be used as the fiber material.

[0020] In the case of a woven fabric, various weaving methods such as plain weave, twill weave, and satin weave may be applied as the weaving method of the warp and the weft. As the warp and / or the weft, for example, heat-shrunk yarn (such as wooly yarn), spandex, twisted yarn and the like may be applied. In the case of a knitted fabric, the knitting method is not limited, and various knitting methods may be applied, and the yarn constituting the knitted fabric is also not particularly limited.

[0021] Woven, knitted, or nonwoven fiber materials can be impregnated (dipped) with an elastic material. The elastic material used to impregnate the fiber material can be the same elastic material as that used for the elastic plate 3, elastic neck portion 4, and lip elastic portion 7, or one or more other elastic materials can be mixed and used. Instead of impregnation, the elastic material can also be applied to fill the gaps in the fiber material. When impregnating or applying the elastic material to the fiber material, it is preferable to dissolve the elastic material in a solvent or the like to make it liquid in order to carry out these processes smoothly.

[0022] In addition, the present invention has described the case in which a fiber-forming part 8 made of a fiber material containing an elastic material is used as the fiber-forming part made of a fiber material, but the present invention is not limited to this. For example, a fiber-forming part may be made by impregnating or coating a fiber material with an elastic material and / or other adhesives such as a liquid resin adhesive. Furthermore, a fiber-forming part may be made by impregnating or coating a fiber material with an adhesive.

[0023] (2) Method for manufacturing wipers for machine tools Next, the manufacturing method for the machine tool wiper 1 described above will be explained. For example, in a mold having an upper mold and a lower mold, a reinforcing plate 2 and a fibrous material containing an elastic material are placed in predetermined positions, and the elastic material is filled into the mold. Then, the elastic material and the fibrous material are heated and pressurized in the upper mold and lower mold to vulcanize the elastic plate 3, the elastic neck portion 4, and the lip portion 6a. In this way, the elastic plate 3, which is vulcanized and bonded to the reinforcing plate 2, the elastic neck portion 4, and the lip portion 6a are simultaneously integrally formed, and the machine tool wiper 1 can be manufactured.

[0024] (3) Action and Effects As described above, the machine tool wiper 1 according to this embodiment comprises an elastic plate 3 made of an elastic material laminated on a reinforcing plate 2, an elastic neck portion 4 integrally formed at the end of the elastic plate 3 with a width W3 smaller than the width W1 of the elastic plate 3, and a lip portion 6a integrally formed at the end of the elastic neck portion 4 with a lip base end surface 5a width W4 larger than the elastic neck portion 4. The lip portion 6a has fiber forming portions 8 made of a fibrous material containing an elastic material, which are provided on both sides of the opposing lip sides 5d and 5e and on the lip tip surface 5c.

[0025] As shown in Figure 2, the machine tool wiper 1 has its lip portion 6a pressed against the sliding surface S and moves back and forth relative to the sliding surface S. The machine tool wiper 1's elastic neck portion 4 bends due to the pressing force, and the elastic restoring force of the elastic neck portion 4 strongly presses the fiber-forming portion 8 of the lip portion 6a against the sliding surface S, allowing the fiber-forming portion 8 to remove foreign matter adhering to the sliding surface S.

[0026] Verification tests, described later, have confirmed that the machine tool wiper 1, by having the fiber-forming portion 8 in contact with the sliding surface S, can reduce sliding resistance compared to the conventional configuration in which the lip portion 6a is formed solely of elastic material.

[0027] Furthermore, since the machine tool wiper 1 has fiber-forming portions 8 formed on both sides of the opposing lip sides 5d and 5e, even when it is moved back and forth against the sliding surface S, the fiber-forming portions 8 on both sides of the lip sides 5d and 5e are always in contact with the sliding surface S, so the sliding resistance can be reduced by the fiber-forming portions 8 even when it is moving back and forth.

[0028] In the machine tool wiper 1, the fibers such as woven fabric that constitute the fiber forming section 8 have a low coefficient of friction and are deformable themselves. Since the fiber forming section 8 does not hinder the elastic deformation of the lip elastic section 7, it can slide without impairing sealing performance.

[0029] (4) Fiber forming part according to another embodiment In the first embodiment described above, a lip portion 6a formed by a lip elastic portion 7 and a fiber forming portion 8 was explained, but the present invention is not limited to this, and as shown in 3A of Figure 3, a lip portion 6b formed only by the fiber forming portion 8 may also be used. In this case, the entire interior of the lip portion 6b, from the lip base end surface 5a to the lip tip surface 5c, to which the elastic neck portion 4 is connected, is formed by the fiber forming portion 8. The elastic neck portion 4 is connected to the fiber forming portion 8.

[0030] Furthermore, in the first embodiment described above, the joint surface 5b between the lip elastic portion 7 and the fiber forming portion 8 is formed in a planar shape, but the present invention is not limited to this. For example, as shown in 3B of Figure 3, the joint surface 11a between the lip elastic portion 7 and the fiber forming portion 11 may have a shape in which the central axis C side of the lip portion 6c is recessed from the elastic neck portion 4 side toward the lip tip surface 5c side. 3B of Figure 3 shows an example in which the joint surface 11a between the lip elastic portion 7 and the fiber forming portion 11 is a V-shaped inclined surface in which the lip side surfaces 5d, 5e are linearly inclined toward the central axis C of the lip portion 6c. Because the fiber forming portion 11 is recessed toward the central axis C, the joint strength between the lip elastic portion 7 and the fiber forming portion 11 in the width direction (x-axis direction) can be improved, and a lip portion 6c that is less prone to damage can be realized.

[0031] Furthermore, as shown in 3C of Figure 3, the joint surface 12a between the lip elastic portion 7 and the fiber forming portion 12 may have a shape that bulges out in a cross-sectional arc from the lip side surfaces 5d and 5e to the central axis C side of the lip portion 6d. In this case, the joint surface 12a is concave on the lip side surfaces 5d and 5e side and on the central axis C side of the lip portion 6d, and has a top portion that bulges out toward the lip elastic portion 7 side between the lip side surfaces 5d and 5e and the central axis C of the lip portion 6d.

[0032] <Second Embodiment> (1) Lip portion having a layered fiber-forming portion In the first embodiment described above, a configuration was described in which fiber-forming portions are provided on both sides of the opposing lip sides and the lip tip surface, with the fiber-forming portion 8 being formed from the lip sides 5d, 5e to the central axis C of the lip portion 6a. However, the present invention is not limited to this. For example, as shown in 4A of Figure 4, another lip portion 21a may be configured in which layered fiber-forming portions 24 are provided only on the surfaces of the lip sides 5d, 5e and the lip tip surface 5c. In the second embodiment, the fiber-forming portions 24, 25, 26, 32 (described later) are also formed from a fiber material containing an elastic material, similar to the fiber-forming portion 8 in the first embodiment described above, so their description is omitted here.

[0033] In this case, the lip portion 21a has a lip elastic portion 23 integrally formed with the elastic neck portion 4. The lip elastic portion 23 is also molded together with the elastic neck portion 4 and is made of the same elastic material as the elastic neck portion 4. The lip elastic portion 23 is formed in an inverted trapezoidal cross-section when viewed from the front, and its longitudinal direction extends in the y-axis direction along the elastic neck portion 4. The lip elastic portion 23 has an elastic tip surface 23c facing the lip base end surface 5a, and elastic side surfaces 23a and 23b that are tapered and inclined toward the elastic tip surface 23c from the lip base end surface 5a.

[0034] On the elastic side surfaces 23a and 23b, layered fiber-forming portions 24 are formed from a predetermined distance from the lip base end surface 5a to the elastic tip surface 23c. Similarly, on the elastic tip surface 23c, layered fiber-forming portions 24 are formed, continuing from the elastic side surfaces 23a and 23b. Thus, the fiber-forming portions 24 are not formed up to the central axis C of the lip portion 21a (the central axis C extending in the height direction as shown in Figure 1), but are formed in layers along the elastic side surfaces 23a, 23b and the elastic tip surface 23c. On the elastic side surfaces 23a and 23b, a step difference equal to the thickness of the fiber-forming portion 24 is formed between the end of the fiber-forming portion 24 and the elastic side surfaces 23a and 23b.

[0035] Furthermore, the machine tool wiper according to the second embodiment can be manufactured in the same manner as the first embodiment described above. For example, by placing a reinforcing plate 2 and a fiber material containing an elastic material at predetermined positions in a mold having an upper mold and a lower mold, filling the mold with the elastic material, and vulcanizing the elastic plate 3, elastic neck portion 4, and lip portion 21a by heating and pressurizing the elastic material and fiber material in the upper and lower molds. Alternatively, after forming the lip elastic portion 23, a layered fiber forming portion 24 may be separately provided on the surface of the lip elastic portion 23 by heating and pressurizing, or by attaching it with an adhesive.

[0036] Even with the configuration of the second embodiment described above, the fiber forming portion 24 comes into contact with the sliding surface S, similar to the embodiment described above, thereby reducing sliding resistance compared to the conventional configuration in which the lip portion 21a is formed solely of an elastic material.

[0037] Furthermore, in the lip portion 21a, the fiber-forming portion 24 is not formed on the lip base end surface 5a, while the fiber-forming portion 24 is provided on the elastic side surfaces 23a and 23b. As a result, when the lip portion 21a is slid against the sliding surface S and a load is applied to the elastic neck portion 4, the fiber-forming portion 24 does not become an obstacle to the elastic deformation of the elastic neck portion 4, allowing the elastic neck portion 4 to deform flexibly, and preventing unnecessary load from being placed on the elastic neck portion 4 by the fiber-forming portion 24.

[0038] (2) Fiber forming part according to another embodiment In the lip portion 21a described above, a layered fiber-forming portion 24 is formed from predetermined positions on the elastic side surfaces 23a and 23b to the elastic tip surface 23c, but the present invention is not limited to this. For example, as shown in 4B of Figure 4, another lip portion 21b may be configured in which a layered fiber-forming portion 25 is provided on the entire surface of the elastic side surfaces 23a and 23b and on the elastic tip surface 23c.

[0039] Furthermore, as shown in 4C of Figure 4, in another embodiment of the lip portion 21c, a layered fiber-forming portion 26 may also be formed on a part of the lip base end surface 5g of the lip portion 21c, which is shown as width W4 in Figure 1. In this case, it is preferable that the lip base end surface 5g has an elastic base end surface 23d exposed to the outside of the lip elastic portion 23 and the end of the fiber-forming portion 26 spaced a predetermined distance apart from the portion connected to the elastic neck portion 4. On the lip base end surface 5g, a step equal to the layer thickness of the fiber-forming portion 26 is formed between the elastic base end surface 23d of the lip elastic portion 23 and the end of the fiber-forming portion 26. When the lip portion 21c is slid on the sliding surface S and a load is applied to the elastic neck portion 4, the elastic neck portion 4 does not come into contact with the end of the fiber-forming portion 26, and the fiber-forming portion 26 does not become a barrier to the elastic deformation of the elastic neck portion 4. Therefore, the elastic neck portion 4 can be flexibly deformed, and it is possible to prevent unnecessary load from being placed on the elastic neck portion 4 by the fiber-forming portion 26.

[0040] Furthermore, in the above-described embodiment, as shown in 4A of Figure 4, fiber-forming portions 24 are provided on the elastic side surfaces 23a and 23b, and a step equal to the thickness of the fiber-forming portion 24 is formed on the elastic side surfaces 23a and 23b. However, the present invention is not limited to this. For example, as shown in 5A of Figure 5, layered fiber-forming portions 24 may be embedded within the elastic side surfaces 28a and 28b of the lip elastic portion 28, and the outer surfaces 28c and 28d exposed to the outside of the elastic side surfaces 28a and 28b may be formed to be flush with the side surfaces 24a and 24b of the fiber-forming portion 24.

[0041] In this embodiment, the outer surfaces 28c, 28d of the elastic side surfaces 28a, 28b and the side surfaces 24a, 24b of the fiber forming portion 24 are flush, which includes, for example, a step difference of the magnitude of the error that occurs during the manufacturing process between the outer surfaces 28c, 28d of the elastic side surfaces 28a, 28b and the side surfaces 24a, 24b of the fiber forming portion 24. In this embodiment, since the fiber forming portion 24 is formed on the elastic side surfaces 28a, 28b such that the layered fiber forming portion 24 is embedded within the lip elastic portion 28, the step difference due to the layer thickness of the fiber forming portion 24 is suppressed on the lip side surfaces 5d, 5e of the lip portion 21d, and a smooth shape with fewer irregularities can be achieved.

[0042] In another embodiment, as shown in 5B of Figure 5, the lip elastic portion 31 may be a lip portion 21f formed in a triangular cross-section when viewed from the front. The elastic sides 31a and 31b of the lip elastic portion 31 are formed to be tapered from the lip base end surface 5a to the lip tip end surface 5c, with the tip being formed at an acute angle. The fiber forming portion 32 is formed in layers and is formed along the elastic sides 31a and 31b of the lip elastic portion 31. In this embodiment, the layered fiber forming portion 32 is formed over the entire surface of the elastic sides 31a and 31b.

[0043] On the lip base end surface 5a, a lip elastic portion 31 is provided instead of a fiber-forming portion 32 around the elastic neck portion 4, and the end of the fiber-forming portion 32 is positioned at a predetermined distance from the portion connected to the elastic neck portion 4. On the lip portion 21f, the lip tip surface 5c is formed when the ends of opposing layered fiber-forming portions 32 abut against each other.

[0044] In another embodiment, as shown in 5C of Figure 5, the lip elastic portion 33 may be formed in a triangular cross-section when viewed from the front, and a layered fiber-forming portion 24 may be embedded in a predetermined area of ​​the elastic side surfaces 33a and 33b of the lip elastic portion 33 to form a lip portion 21g. In this case, the lip portion 21g may be formed so that the outer surfaces 33c and 33d exposed to the outside of the elastic side surfaces 33a and 33b of the lip elastic portion 33 and the side surfaces 24a and 24b of the fiber-forming portion 24 are flush.

[0045] Furthermore, the statement that the outer surfaces 33c, 33d of the elastic side surfaces 33a, 33b and the side surfaces 24a, 24b of the fiber-forming portion 24 are flush includes any step difference between the outer surfaces 33c, 33d of the elastic side surfaces 33a, 33b and the side surfaces 24a, 24b of the fiber-forming portion 24 that may occur during the manufacturing process.

[0046] Even with the lip portions 21b, 21c, 21d, 21f, and 21g as described above, the fiber-forming portions 24, 25, 26, and 32 come into contact with the sliding surface S, similar to the embodiment described above. This reduces the sliding resistance compared to the conventional configuration in which the lip portions 21b, 21c, 21d, 21f, and 21g are formed solely from elastic material.

[0047] <Verification Test> Next, verification tests were conducted to examine the average maximum static friction coefficient, average dynamic friction coefficient, durability, and wear amount for each of the following: Example 1 was the machine tool wiper 1 according to the first embodiment shown in Figure 1, and Comparative Example 1 was a conventional machine tool wiper having a lip portion consisting only of a lip elastic portion without a fiber forming portion 8.

[0048] (1) Example 1 In the verification test, as Example 1, a machine tool wiper 1 was fabricated with the following specifications: z-axis height H1 of 25.0 [mm], lip portion 6a height H2 of 5.0 [cm], reinforcing plate 2 height H3 of 18.0 [mm], elastic neck portion 4 height H4 of 1.0 [mm], elastic plate 3 width W1 of 2.0 [mm], reinforcing plate 2 width W2 of 1.6 [mm], and elastic neck portion 4 width W3 of 1.0 [mm]. Steel plate was used for the reinforcing plate 2. Nitrile rubber (NBR) was used as the elastic material for the elastic plate 3, elastic neck portion 4, and lip elastic portion 7. Woven fabric impregnated with NBR was used as the elastic material for the fiber forming portion 8.

[0049] (2) Comparative Example 1 In addition, as Comparative Example 1, a conventional machine tool wiper was prepared in which the dimensions of each part were the same as in Example 1, but the lip portion was formed entirely of elastic material without the fiber-forming portion 8.

[0050] (3) The state of pressure applied to the sliding surface by the machine tool wiper Then, as shown in Figures 6A, 6B, and 6C, the prepared samples of Example 1 and Comparative Example 1 were fixed to the fixing device 100 and moved relative to the sliding surface S in one direction while being pressed against the sliding surface S with a predetermined amount of pressure. The sliding surface S is a surface made of steel. Figures 6A, 6B, and 6C of Figure 6 are schematic diagrams showing the state of the lip portion 6a when the machine tool wiper 1 is pressed against the sliding surface S with different amounts of pressure.

[0051] Figure 6A shows the state when the machine tool wiper 1 is pressed against the sliding surface S by 1.0 mm, Figure 6B shows the state when the machine tool wiper 1 is pressed against the sliding surface S by 3.0 mm, and Figure 6C shows the state when the machine tool wiper 1 is pressed against the sliding surface S by 5.0 mm. In this way, by increasing the amount of pressure, the curvature of the lip portion 6a also increases, and the contact area of ​​the lip portion 6a with the sliding surface S also increases.

[0052] (4) Average value of maximum static friction coefficient and average value of kinetic friction coefficient Next, verification tests were conducted to examine the average values ​​of the maximum static friction coefficient and dynamic friction coefficient for each machine tool wiper in Example 1 and Comparative Example 1, when the pressing amount against the sliding surface S was set to 2.0 [mm] and 5.0 [mm], respectively. Here, three samples were prepared for each machine tool wiper in Example 1 and Comparative Example 1.

[0053] Specifically, each sample from Example 1 and Comparative Example 1 was pressed against the sliding surface S with pressures of 2.0 mm and 5.0 mm, respectively, and the sample was then driven dry in one direction at a speed of 1 mm / sec. For each of Example 1 and Comparative Example 1, the average value of the maximum static friction coefficient and the average value of the dynamic friction coefficient were measured for the three samples. The maximum static friction coefficient and dynamic friction coefficient were measured using a friction coefficient measuring instrument (product name: Peeling / Slipping / Scratching TESTER HEIDON-14 (manufactured by Shinto Kagaku Co., Ltd.)).

[0054] As a result, the results shown in Figures 7A to 7D were obtained. Figures 7A and 7B show the average values ​​of the maximum static friction coefficient and dynamic friction coefficient when the pressing amount is 2 mm. Figures 7C and 7D show the average values ​​of the maximum static friction coefficient and dynamic friction coefficient when the pressing amount is 5 mm. From the results in Figure 7, it was confirmed that Example 1 showed a significant reduction in both the maximum static friction coefficient and the dynamic friction coefficient compared to Comparative Example 1.

[0055] (5) Durability and wear Next, verification tests were conducted to confirm the durability and wear amount of Example 1 and Comparative Example 1. Here, as shown in Figure 8, the durability and wear amount of the samples from Example 1 and Comparative Example 1 were investigated when pressed against the sliding surface S with pressure amounts of 2.0 [mm], 3.0 [mm], and 4.0 [mm].

[0056] Here, three samples each were prepared for the machine tool wipers of Example 1 and Comparative Example 1. Then, each sample from Example 1 and Comparative Example 1 was pressed against the sliding surface S with the aforementioned pressure, and the sample was driven dry for 500 km at a speed of 30 m / min in one direction to confirm its durability. After that, coolant dripped onto the sliding surface S was scraped off. At this point, the three samples from Example 1 and Comparative Example 1 were visually inspected for any damage to the lip portion or any remaining coolant, and the durability of Example 1 and Comparative Example 1 was investigated.

[0057] As a result, as shown in Figure 8, in Comparative Example 1, in the range of pressure amounts from 2.0 to 4.0 [mm], the lip portion was damaged by wear before the average travel distance reached 500 [km], confirming that it did not have sufficient durability.

[0058] On the other hand, in Example 1, it was confirmed that the lip portion did not break in the pressing range of 2.0 to 4.0 mm, and that it had sufficient durability, reaching an average travel distance of 500 km. Furthermore, it was confirmed that Example 1 also performed well in scraping off coolant.

[0059] These results confirm that by providing a fiber-forming portion 8 on the lip portion 6a and ensuring that the fiber-forming portion 8 is in contact with the sliding surface S, durability is improved compared to the conventional configuration (Comparative Example 1) in which the lip portion 6a is formed solely of an elastic material.

[0060] Furthermore, during the durability tests described above, the mass of each sample in Example 1 and Comparative Example 1 was measured before and after the running test to investigate the amount of wear after the running test. As shown in Figure 8, it was confirmed that Example 1 had less wear than Comparative Example 1. From this, it was confirmed that Example 1 had less wear due to friction than Comparative Example 1, and thus had improved durability. [Explanation of symbols]

[0061] 1. Wiper for machine tools 2 Reinforcement plate 3 Elastic plate 4 Elastic neck 5a, 5g Lip base end face 5c Lip tip surface 5d, 5e Lip side 6a, 6b, 6c, 21a, 21b, 21c, 21d, 21f, 21g Lip section 8,11,12,24,25,26,32 Fiber forming section

Claims

1. A machine tool wiper that is attached to a machine tool, A reinforcing plate made of a rigid material, An elastic plate made of an elastic material laminated on the reinforcing plate, An elastic neck portion made of the aforementioned elastic material, integrally formed with the end of the elastic plate, and having a width smaller than the width of the elastic plate, A lip portion having a lip base end surface integrally formed with the end of the elastic neck portion, wherein the width of the lip base end surface is greater than that of the elastic neck portion, Equipped with, A wiper for a machine tool, wherein the lip portion has fiber-forming portions made of a fibrous material provided on both sides of the opposing lip sides and on the lip tip surface.

2. The fiber-forming portion is formed from both sides of the lip surface to the central axis of the lip portion. A wiper for a machine tool according to claim 1.

3. The aforementioned lip portion includes, The fiber-forming portion is formed such that the central axis side of the lip portion is recessed from the elastic neck portion side toward the lip tip surface side. A wiper for a machine tool according to claim 2.

4. The aforementioned lip portion is The fiber-forming portion is formed in layers along the lip side surface and the lip tip surface, and the central axis side of the lip portion is formed by the elastic material of the elastic neck portion. A wiper for a machine tool as described in claim 1.

5. The end of the fiber-forming portion is positioned on the lip base end surface at a predetermined distance from the portion connected to the elastic neck portion. A wiper for a machine tool according to claim 1.

6. The fiber-forming portion is formed of a fiber material containing an elastic material and / or an adhesive. A wiper for a machine tool according to claim 1.

7. The aforementioned fibrous material is a cloth. A wiper for a machine tool according to any one of claims 1 to 6.

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