JP2014029045A - Ring/traveler system of ring type spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ring/traveler system of a ring type spinning machine in which a friction reduction effect is improved relative to prior art and the friction reduction effect is maintained for a long time without using a liquid lubrication.SOLUTION: The ring/traveler system of a ring type spinning machine (ring spinning frame) has a periodic structure 14 in which a recess part (groove) having a depth of 0.1 to 20 μm, preferably 5 μm or less, and a plane part having a width of 1 to 250 μm, preferably 10 to 50 μm are alternately formed on a slide surface of a traveler 12 and a ring 11 at the traveler 12 slides. A groove is formed as a recess part.

Description

  The present invention relates to a ring / traveler system of a ring spinning machine, and more particularly to a ring / traveler system without liquid lubrication of a ring spinning machine.

  In ring / traveller systems for ring spinning machines, various materials such as material changes, surface treatments, shape changes, and the use of lubricants are used to achieve speedup and life extension by suppressing performance degradation due to frictional wear and seizure. The technology has been proposed. Of these, the method of using a lubricating liquid is effective at a relatively low cost, but there are problems such as dirty thread passing by oil and troublesome maintenance, and it is relatively limited such as wool spinning. It is used only for certain purposes.

  It has been proposed that a ring of a ring spinning machine or a ring twisting machine is subjected to hard chromium plating having a surface structure as a surface treatment with improved wear reduction effect (see Patent Document 1). As the surface structure, it is said that the thickness of the hard chrome coating is 1 μm to 60 μm, and the roughness Ra is particularly preferably at most 0.3 μm.

  Although not directly related to the ring spinning machine, a method of creating a fine periodic structure that reduces the frictional resistance of the material surface has been proposed (see Patent Document 2). Specifically, the material surface is irradiated with a femtosecond pulse laser, the irradiated part is overlapped and scanned, and a periodic structure is created by ablation of the interference part of incident light and scattered light along the material surface. . The periodic structure has submicron spacing and groove depth.

Japanese translation of PCT publication No. 2002-510755 International Publication No. 2004/035255

  However, in the configuration of Patent Document 1, the effect of reducing the frictional resistance when the traveler slides is insufficient, and the traveler may scatter from the ring due to wear. On the other hand, the configuration proposed in Patent Document 2, that is, the configuration in which a fine periodic structure is imparted to the sliding surface is premised on sliding under liquid lubrication conditions. Therefore, when applied as it is to a ring / traveler system that is slid under a condition without liquid lubrication, the periodic structure is worn away at an early stage, and the effect of reducing frictional resistance is lost.

  The present invention has been made in view of the above problems, and its purpose is to improve the friction reduction effect compared to the conventional product without using liquid lubrication and to maintain the friction reduction effect for a long time. It is to provide a ring / traveler system of a ring spinning machine.

  The ring / traveler system of the ring spinning machine that solves the above problems is non-liquid lubricated, and has a recess of 0.1 to 20 μm in the sliding surface between the traveler and the ring when the traveler slides, The flat portions having a width of 250 μm are alternately formed. Here, the “ring-type spinning machine” means a spinning machine such as a ring spinning machine or a ring twisting machine that winds a yarn through a traveler that slides on a ring that is supported by a ring rail and moves up and down. In addition, the “concave portion” means a recess in which the groove and the periphery are surrounded by a plane.

  In the present invention, a wedge effect due to the surrounding air is produced by sliding with the concave portion to obtain a friction reducing effect, and the sliding is performed on the flat portion, so that the concave portion is not worn. The concave portion and the flat portion may be formed in a ring or a traveler. Therefore, without using liquid lubrication, the friction reduction effect can be improved and the friction reduction effect can be maintained for a long time as compared with the conventional product.

  The width of the flat portion is preferably 10 to 50 μm. If the width of the flat surface portion is narrow, it is disadvantageous in terms of wear of the flat surface portion, and if the width of the flat surface portion is wide, the total area of the recesses becomes small and the contribution of the wedge effect decreases. Therefore, the width of the flat portion is preferably 10 to 50 μm.

The depth of the recess is preferably 5 μm or less. In this case, it is easy to obtain the load capacity due to the recess.
The recess is preferably a groove. In the case where the recess is a groove, the friction reduction effect due to wear powder discharge is more easily exhibited than in the case where the recess is a depression.

  The recess is circular and has a diameter of 5 to 50 μm and a depth of 1 to 10 μm, and the distance between adjacent recesses is preferably 10 to 100 μm. Even if the recess is not a groove, when the diameter, depth, and distance between adjacent recesses are within the above ranges, wear powder and foreign particles are discharged from the sliding interface between the traveler and the ring. A good friction reducing effect can be obtained.

  It is preferable that a solid lubricating coating layer is formed in at least the concave portion of the concave portion and the flat portion. According to this configuration, since the solid lubricious coating layer is formed in the concave portion, fibers, wear powder, and other foreign matters enter the concave portion as compared with the case where the solid lubricating coating layer is not formed. It is possible to suppress the reduction of the wedge effect due to the concave portion and the effect of removing wear powder and other foreign matters from the sliding interface between the traveler and the ring.

  According to the present invention, it is possible to provide a ring / traveler system for a ring spinning machine that can improve the friction reduction effect and maintain the friction reduction effect for a long time without using liquid lubrication. .

(A) is a perspective view of the ring of 1st Embodiment, (b) is a partial expanded perspective view, (c) is a schematic cross section which shows the relationship between the traveler and ring during spinning. (A), (b), (c) is a schematic cross section which shows the relationship between a groove | channel and a plane part. (A), (b), (c) is a schematic diagram which shows the direction where a groove | channel extends. (A), (b), (c) is a schematic diagram which shows the relationship between the groove | channel extended diagonally, and a plane part. The graph which shows the relationship between run resistance and run distance. (A) is a schematic diagram which shows the abrasion state of the traveler at the time of using the ring of embodiment, and (b) at the time of using a commercially available ring. The schematic diagram which shows the recessed part of 2nd Embodiment. The graph which shows the relationship between run resistance and run distance. (A) is a schematic diagram which shows the abrasion state of the traveler at the time of using the ring of embodiment, and (b) at the time of using a commercially available ring. The schematic cross section of embodiment by which the solid lubricious coating was formed in the recessed part wall surface. (A) is a schematic cross-sectional view showing the shape of the groove of another embodiment, (b) is a schematic diagram showing the arrangement of the groove of another embodiment, (c) is the shape of the ring and traveler of another embodiment. FIG. The schematic diagram which shows the recessed part of another embodiment.

(First embodiment)
Hereinafter, a first embodiment in which the present invention is embodied in a ring / traveler system of a ring spinning machine will be described with reference to FIGS.

  As shown in FIGS. 1A to 1C, the ring 11 constituting the ring / traveler system has a flange 11a having a T-shaped cross section, and the traveler 12 is formed in a C-shaped cross section. The ring 11 is made of bearing steel, and as shown in FIGS. 1B and 1C, a plating layer 13 is formed on the surface of the flange 11a. The plated layer 13 is chrome plated and has a thickness of about 10 to 20 μm.

  The plated layer 13 has a periodic structure (texture) on the sliding surface of the traveler 12 and the ring 11 when the traveler 12 slides, and in this embodiment, on the inner peripheral surface of the flange 11a as shown in FIG. 14 is formed. As shown in FIGS. 2, 3, and 4, the periodic structure 14 is configured in a state in which grooves 15 as concave portions and flat portions 16 are alternately formed. The groove 15 has a depth of 0.1 to 20 μm, preferably 5 μm or less. The flat portion 16 has a width of 1 to 250 μm, preferably 10 to 50 μm.

  The groove 15 is formed with a constant width, and as shown in FIG. 2A, even if the groove width W1 is the same as the ridge width W2 as the width of the plane portion 16, as shown in FIG. May be wider than the ridge width W2, or the groove width W1 may be narrower than the ridge width W2, as shown in FIG. Moreover, even if the extending direction of the groove 15 is a direction orthogonal to the circumferential direction of the ring 11 as shown in FIG. 3A, the groove 15 is parallel to the circumferential direction as shown in FIG. Even if it exists, as shown in FIG.3 (c), the direction which cross | intersects the circumferential direction diagonally may be sufficient. 3A to 3C, the horizontal direction in the figure is the circumferential direction of the ring 11.

The periodic structure 14 is formed by, for example, irradiating a portion of the ring 11 where the periodic structure 14 is to be formed with a femtosecond pulse laser.
Next, the operation of the ring / traveler system configured as described above will be described. As shown in FIG. 1C, the yarn Y sent from a draft part (not shown) is wound around a bobbin (not shown) that rotates at high speed via a traveler 12. The maximum rotation speed of the spindle during the normal spinning operation of the ring spinning machine is about 25000 rpm, and the traveler 12 slides on the flange 11a by the winding tension of the yarn Y. Although the sliding posture of the traveler 12 differs slightly depending on the rotational speed, as shown in FIG.

  The ring / traveler system of this embodiment has a periodic structure 14 in which grooves 15 and flat portions 16 are alternately formed on the sliding surface of the ring 11 and the traveler 12 when the traveler 12 slides. Therefore, due to the presence of the groove 15, the wedge effect due to the surrounding air during sliding and the effect of discharging wear powder and other foreign matters from the sliding interface between the traveler and the ring, there is a friction reducing effect without using liquid lubrication. can get. And since sliding is performed by the plane part 16, the groove | channel 15 does not wear out. As a result, the friction reduction effect is improved as compared with the conventional product, and the friction reduction effect is maintained for a long time. Further, conventionally, there is a possibility that even a ring that has aged for life can be regenerated by forming the periodic structure 14.

  In order to confirm the effect of the periodic structure 14, first, the ring 11 having a periodic structure without a plane portion was formed by irradiating a portion of the ring 11 where the periodic structure 14 is to be formed with a femtosecond pulse laser. A ring / traveler system was formed by forming a ring 11 having three types of periodic structures in which the direction of periodic unevenness was orthogonal to the circumferential direction of the ring 11, parallel to the circumferential direction, and circumferential and oblique directions. As a comparative example, a ring / traveller system using a commercially available ring having no periodic structure was constructed. Then, the spinning test was performed without running-in. The test was performed until the traveling distance of the traveler 12 reached 6600 km (the traveling distance of the traveler 12 from spinning start to duffing 200 km × 33 times of doffing), and the relationship between the sliding resistance and the sliding distance was examined. The sliding resistance was obtained by rotatably supporting the ring and measuring the rotating force applied to the ring by a traveler with a load cell.

  As a result, up to a sliding distance of 2200 km, the ring / traveler system having the periodic structure 14 had a lower sliding resistance than the commercially available products. And, in the periodic structure 14 in which the direction of the periodic unevenness is parallel to the circumferential direction of the ring 11 and in the circumferential direction and the oblique direction, the sliding resistance is reduced by about 30% as compared with the commercially available product up to the sliding distance of 2600 km to 4200 km. . However, in the case of the periodic structure 14 in which the direction of the periodic unevenness is orthogonal to the circumferential direction of the ring 11, the advantage over the commercial product is lost when the number of Doffs is 13 times or more.

  Therefore, as shown in FIGS. 4A, 4 </ b> B, and 4 </ b> C, the periodic structure 14 in which the direction of the periodic unevenness is oblique with respect to the circumferential direction of the ring 11 (corresponding to the horizontal direction in the figure). For the ring 11 having, the groove width W1 and the ridge width W2 of the flat surface portion 16 were variously changed, and the relationship between the sliding resistance and the Doff number was examined. 4A to 4C, the dot portion represents the groove 15, and the non-dot portion represents the flat portion 16.

  The periodic structure 14 having the groove 15 having an angle of 45 ° with respect to the circumferential direction of the ring 11 was tested by forming the values of the groove width W1, the ridge width W2, and the groove depth D in the combinations shown in the table. went. In addition, up to a running distance of 1400 km, the number of rotations was increased stepwise from 15000 to 21000 rpm, and spinning was performed by running-in, and spinning was performed at a high speed (22000 rpm) after the running distance of 1600 km.

The results are shown in FIG. From FIG. 5, at the time of spinning at high speed after the running-in operation, compared to the case of using a commercially available ring, the ring 11 having the periodic structure 14 has a lower sliding resistance, and the effect of the periodic structure 14 is confirmed. It was done.

  When the relationship between the groove width W1 and the ridge width W2 is the same and the groove depth D is different, an example in which the groove width W1 is 20 μm and the ridge width W2 is 20 μm (sample 1 and sample 5), and the groove width W1 is In both cases of 40 μm and ridge width W2 of 20 μm (sample 3 and sample 6), the sliding resistance is smaller when the groove depth is shallower (1 μm) than when the groove depth D is deeper (5 μm). became. It is considered that the groove depth is more preferably 1 μm than 5 μm.

  Further, when the wear state of the traveler 12 was observed, when a commercially available ring was used, as shown in FIG. 6 (b), the wear portion 20 was formed on the portion that became the sliding surface with the ring. . However, when the ring 11 having the periodic structure 14 is used, the wear part 20 ′ is reduced as compared with the wear part 20 as shown in FIG.

According to this embodiment, the following effects can be obtained.
(1) A ring / traveler system of a ring spinning machine (ring spinning machine) includes a recess having a depth of 0.1 to 20 μm on a sliding surface between the traveler 12 and the ring 11 when the traveler 12 slides, The planar structure 16 having a width of 250 μm and the periodic structure 14 are alternately formed. Therefore, the wedge effect by the surrounding air at the time of sliding can improve the friction reduction effect compared with the conventional product without using liquid lubrication, and can maintain the friction reduction effect for a long time.

(2) Since the grooves 15 are formed as the recesses, the friction reduction effect due to the wear powder discharge is easily exhibited as compared with the case where the recesses are recessed.
(3) When the width of the plane portion 16 is 10 to 50 μm, the wear is reduced from the viewpoint of wear of the plane portion 16 and the contribution of the wedge effect of the periodic structure 14 as compared with the case of deviating from this range. The effect is improved.

(4) When the depth of the recess (groove 15) is 5 μm or less, it is easy to obtain the load capacity due to the recess.
(5) The periodic structure 14 is configured such that the direction of the periodic unevenness between the groove 15 and the flat portion 16 is inclined with respect to the circumferential direction of the ring 11. Therefore, the friction reduction effect is improved as compared with the case where the direction of the periodic unevenness is the direction orthogonal to the circumferential direction.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. This embodiment is different from the first embodiment in that the recess is formed by a dimple 17 instead of the groove 15. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 7, the recess 17 has a circular opening. The recess 17 is a recess having a diameter of 5 to 50 μm and a depth of 1 to 10 μm, and the distance between adjacent recesses is 10 to 100 μm. That is, the recess 17 is a non-liquid lubrication in a ring / traveler system of a ring type spinning machine, and a recess having a depth of 0.1 to 20 μm is formed on the sliding surface between the traveler 12 and the ring 11 when the traveler 12 slides. , Satisfying the condition that the flat portions having a width of 1 to 250 μm are alternately formed. The depression 17 is formed, for example, by performing a bead shot at a location where the periodic structure of the ring 11 is to be formed.

  A recess / traveller system was formed by forming recesses 17 at a location where the periodic structure of the ring 11 was to be formed, with a diameter of 10 μm, a depth of 2 μm, and a distance between adjacent recesses of 70 μm. As a comparative example, a ring / traveler system using a commercially available ring having no depressions 17 was constructed. And each spinning test was conducted. In addition, up to a running distance of 1400 km, the number of rotations was increased stepwise from 15000 to 21000 rpm, and spinning was performed by running-in, and spinning was performed at a high speed (22000 rpm) after the running distance of 1600 km.

  The results are shown in FIG. From FIG. 8, at the time of spinning at high speed after the break-in operation, the sliding resistance was reduced in the ring 11 having the depressions 17 compared with the case where a commercially available ring was used, and the effect of the depressions 17 was confirmed.

  Further, when the wear state of the traveler 12 was observed, when a commercially available ring was used, as shown in FIG. 9 (b), the wear part 20 was formed in a portion that became a sliding surface with the ring. . However, when the ring 11 having the recess 17 is used, the size of the wear part 20 ′ is smaller than that of the wear part 20 as shown in FIG. 9A.

Therefore, in this embodiment, the following effect can be obtained in addition to the same effect as (1) of the first embodiment.
(6) Since the circular depressions 17 are formed as the recesses, energy consumption required for forming the recesses is less than when the grooves 15 are formed.

The embodiment is not limited to the above, and may be embodied as follows, for example.
As shown in FIG. 10, a solid lubricating coating layer 18 may be formed on the wall surface of the groove 15 or the depression 17 as a recess. The solid lubricating coating layer 18 is formed of, for example, a fluororesin. However, it is preferable that the groove width W1, the groove depth D, and the diameter and depth of the depressions 17 are several μm or more so that the solid lubricant coating layer 18 does not fill the grooves 15 and depressions 17. When the solid lubricious coating layer 18 is formed in the groove 15 or the recess 17, fibers, wear powder, and other foreign substances are present in the groove 15 or the recess 17 compared to the case where the solid lubricious coating layer 18 is not formed. Even if it invades, the discharge property becomes high. As a result, it is possible to suppress a reduction in the wedge effect due to the concave portion and the effect of discharging wear powder and other foreign matters from the sliding interface between the traveler 12 and the ring 11.

  The solid lubricious coating layer 18 only needs to be formed in at least the concave portion of the concave portion and the flat portion 16, and the solid lubricating coating layer 18 is applied not only to the wall surface of the groove 15 or the recess 17 but also to the flat portion 16. It may be formed. In the case where the solid lubricating coating layer 18 is formed on the flat portion 16, the compatibility between the traveler 12 and the ring 11 after the traveler replacement is improved.

  The groove 15 is not limited to a symmetrical shape with respect to the center in the width direction. For example, as shown in FIG. 11A, the deepest portion of the groove 15 exists at a position offset toward the one flat surface portion 16 across the groove 15, and reaches the one flat surface portion 16 from the deepest portion. The surface may be formed as an arc surface, and the surface reaching the other flat surface portion 16 may be formed as a flat slope.

  O When the periodic structure 14 is constituted by the grooves 15, the grooves 15 are not limited to the grooves 15 extending in one direction. For example, as shown in FIG. 11B, a structure in which both a groove 15 extending in parallel with the circumferential direction of the ring 11 and a groove 15 extending in a direction obliquely intersecting with the circumferential direction may exist. Further, as the groove 15 extending in a direction obliquely intersecting with the circumferential direction, a structure in which two types of grooves 15 having symmetry opposite to the angle formed with the circumferential direction may be provided.

The angle formed by the groove 15 extending in a direction obliquely intersecting the circumferential direction of the ring 11 with the circumferential direction is not limited to 45 ° and may be an arbitrary angle.
The recess 17 is not limited to a circular opening, and may be, for example, an ellipse, an oval, a rectangle, or a polygon. The depression 17 having a shape other than circular in the shape of the opening is formed by a method of irradiating a position where the depression 17 is to be formed with an ultrashort pulse laser such as a femtosecond pulse laser instead of the bead shot. Further, the recess 17 is not limited to a configuration having only the same shape or size, but may have a mixture of different shapes and sizes as shown in FIG. That is, the depression 17 may not have a periodic structure.

  The periodic structure 14 may be formed without forming the plating layer 13 on the flange 11a. However, when the material of the ring 11 is a material currently used in a commercial product, it is preferable to form the plating layer 13.

  The ring 11 constituting the ring / traveler system does not have a flange 11a having a T-shaped cross section. For example, as shown in FIG. 11C, the present invention may be applied to a ring 11 having an inclined flange 11a. In this case, the traveler 12 also has a shape corresponding to the inclined flange.

  The method for forming the periodic structure 14 is not limited to a method of irradiating a position where the periodic structure 14 is to be formed with an ultrashort pulse laser such as a femtosecond pulse laser. For example, microetching or various chemical and physical methods may be used.

  ○ Not applicable to ring / traveler systems that use a lubricating liquid because the yarn Y passing through the ring / traveler system becomes dirty, but for example, ring / traveler systems that use solid lubrication such as polytetrafluoroethylene. You may apply.

  The periodic structure 14 may be formed in the traveler 12 instead of being formed in the ring / traveler ring 11. However, when provided on the traveler 12, the area of the periodic structure 14 is significantly smaller than when provided on the ring 11.

(Circle) You may apply to not only a ring spinning machine but the spinning machine which has a ring, for example, a ring twisting machine.
The following technical idea (invention) can be understood from the embodiment.

  (1) A ring of a ring-type spinning machine, in which a concave portion having a depth of 0.1 to 20 μm and a flat portion having a width of 1 to 250 μm are alternately formed on a contact surface with the traveler during sliding of the traveler A ring having a periodic structure formed.

  (2) A traveler of a ring spinning machine, in which a concave portion having a depth of 0.1 to 20 μm and a flat portion having a width of 1 to 250 μm are alternately formed on a contact surface with the ring during sliding of the traveler Having a periodic structure formed.

  DESCRIPTION OF SYMBOLS 11 ... Ring, 12 ... Traveler, 15 ... Groove as a recessed part, 16 ... Planar part, 17 ... Depression as a recessed part, 18 ... Solid lubricating coating layer.

Claims (6)

  In a ring / traveler system of a ring type spinning machine, non-liquid lubrication, a sliding surface between the traveler and the ring when the traveler slides, a recess having a depth of 0.1 to 20 μm and a plane having a width of 1 to 250 μm Ring / traveler system of a ring spinning machine, characterized in that the parts are formed alternately.   The ring / traveler system of the ring type spinning machine according to claim 1, wherein the flat portion has a width of 10 to 50 µm.   The ring / traveler system of the ring spinning machine according to claim 1 or 2, wherein the depth of the recess is 5 µm or less.   The ring / traveler system of the ring spinning machine according to any one of claims 1 to 3, wherein the recess is a groove.   The ring / traveler system of the ring type spinning machine according to claim 1, wherein the concave portion is a circular recess having a diameter of 5 to 50 µm and a depth of 1 to 10 µm, and a distance between adjacent recesses is 10 to 100 µm.   The ring / traveler system of the ring type spinning machine according to any one of claims 1 to 5, wherein a solid lubricating coating layer is formed on at least the concave portion of the concave portion and the flat portion.