JP2019171410A - Rotation plastic processing roller and rotation plastic processor comprising the same - Google Patents

Abstract

To provide a rotation plastic processing roller capable of achieving both the aesthetic appearance of a processed face and the workability of a tapered face, and a rotation plastic processor comprising the same.SOLUTION: A rotation plastic processing roller 10 comprises a molding face part 11, a first flank part 12, and a second flank part 13. The molding face part 11 is formed in a taper expanding in diameter rearward of a feed direction Z. The first flank part 12 is continuously formed at the rear end of the molding face part 11. The first flank part 12 is formed in a taper shrinking in diameter rearward of the feed direction Z. The second flank part 13 is continuously formed at the rear end of the first flank part 12. The second flank part 13 is formed in a taper shrinking in diameter rearward of the feed direction Z at a taper angle θ3 larger than a taper angle θ2 of the first flank part 12.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a rotary plastic working roller and a rotary plastic working apparatus including the same.

  Patent Document 1 discloses conventional rotational plastic working. In this processing, a cored bar is inserted into the pipe material to be processed and rotated, and the feed direction (parallel to the rotation axis) is rotated while being driven by rotation of the pipe material while pressing a roller against the outer peripheral surface of the pipe material. Spinning to move in the direction). A thin part is formed in the pipe material after processing. A tapered surface is formed between the thin-walled portion thus formed and the thick-walled portion thicker than the thin-walled portion, and the outer peripheral surfaces having different diameters are continuously connected.

Japanese Patent Laid-Open No. 2005-7421

  The roller used for processing in Patent Document 1 is formed in a taper shape in which the diameter of the central portion is the largest and the diameter on both sides in the axial direction is reduced toward the end. In a spinning process using such a roller, in order to obtain a good processed surface, it is preferable to set the angle of the tapered surface (flank) behind the roller in the feed direction to be smaller. However, when the angle of the tapered surface of the roller is reduced, it is difficult to form a tapered surface larger than the angle of the tapered surface of the roller when the tapered surface is formed on the workpiece processing surface.

  The present invention has been made in view of the above-described conventional circumstances, and provides a rotary plastic processing roller capable of achieving both the aesthetics of a processed surface and the workability of a tapered surface, and a rotary plastic processing apparatus including the roller. It is a problem to be solved.

  The roller for rotational plastic working of the present invention includes a forming surface portion, a first flank portion, and a second flank portion. The molding surface portion is formed in a tapered shape whose diameter increases toward the rear in the feed direction. The first flank portion is continuously formed at the rear end of the molding surface portion. Further, the first flank portion is formed in a tapered shape having a diameter reduced toward the rear in the feed direction. The second flank portion is continuously formed at the rear end of the first flank portion. Further, the second flank portion is formed in a taper shape having a taper angle larger than the taper angle of the first flank portion and reducing the diameter toward the rear in the feed direction.

  With this configuration, in the rotary plastic working roller of the present invention, the taper angle of the first flank portion can be set to an angle at which the machined surface can have a good aesthetic appearance, and the taper angle of the second flank portion can be processed. The angle can be set to obtain a tapered surface having a desired angle on the surface. That is, the taper angle of the first flank portion can be set to an angle that can suitably suppress the bulge of the machined surface due to plastic deformation regardless of the angle of the taper surface formed on the machined surface. It is possible to obtain a processed surface having a good aesthetic appearance. Further, the taper angle of the second flank portion can be set to an angle suitable for forming the taper angle of the processed surface.

  Therefore, the rotary plastic working roller of the present invention can achieve both the aesthetics of the machined surface and the workability of the tapered surface.

  In the rotary plastic working roller of the present invention, the length of the first flank portion in the feed direction can be set larger than the amount of movement in the feed direction per one rotation of the workpiece to be machined during machining. In this case, the swell of the processed surface due to plastic deformation can be reliably suppressed by the first flank portion, and a processed surface with a better appearance can be obtained.

  The rotary plastic working apparatus of the present invention includes a work support part, the above-mentioned rotary plastic working roller, a roller support part, and a relative movement part. The workpiece support unit rotates around a predetermined rotation axis while supporting the workpiece to be processed. The roller support portion moves toward the outer peripheral surface of the workpiece while rotatably supporting the roller for rotational plastic working. The relative movement unit relatively moves the workpiece and the rotary plastic working roller in the feed direction.

  The rotational plastic working apparatus of the present invention includes the above-mentioned rotational plastic working roller, so that it is possible to perform processing that achieves both the aesthetic appearance of the processed surface and the workability of the tapered surface.

  The rotational plastic working apparatus of the present invention can include a plurality of rotational plastic working rollers. In this case, a processed surface with better aesthetics can be obtained.

It is a figure which shows typically the outline of the rotary plastic working apparatus which concerns on embodiment. It is the II-II arrow directional view of FIG. It is a side view which shows the roller for rotational plastic working which concerns on embodiment. It is the elements on larger scale of the roller for rotary plastic working which concerns on embodiment. It is a figure for demonstrating the effect | action of embodiment.

  Next, an embodiment embodying the roller for rotational plastic working and the rotational plastic working apparatus of the present invention will be described with reference to the drawings.

  The rotational plastic working device 1 of the present embodiment is a device that performs so-called spinning processing, flow forming processing, etc., and a rotational plastic working roller (hereinafter also simply referred to as a roller) on the outer peripheral surface of a rotating cylindrical workpiece W. This is an apparatus that obtains a desired shape by plastic deformation by pressing 10. As shown in FIGS. 1 and 2, the rotary plastic working apparatus 1 includes a roller 10, a work support unit 20, and a roller support moving unit (illustrated as a roller support unit and a relative moving unit according to the present invention) 30. Yes.

  The workpiece support 20 rotates around the axis C while supporting the workpiece W. As shown in FIG. 1, the work support portion 20 has a main shaft portion 21 and a mandrel portion 22. The main shaft portion 21 is driven by driving means (not shown) and rotates around the axis C. The main shaft portion 21 includes a chuck portion 21A. The chuck portion 21 </ b> A is formed in a mortar shape with the axis C as the center. The chuck portion 21 </ b> A contacts one end of the workpiece W when supporting the workpiece W. The mandrel part 22 is formed in a cylindrical shape, and the central axis thereof is arranged along the axis C. The mandrel portion 22 is rotatably supported at one end 22A thereof and rotated about the axis C. Further, the other end 22 </ b> B of the mandrel part 22 is provided to face the main shaft part 21. Further, the mandrel portion 22 is provided so as to be movable along the axis C. The work support part 20 supports the work W in such a form that the mandrel part 22 is inserted from one end side of the cylindrical work W and the other end side of the work W is sandwiched between the main shaft part 21 and the mandrel part 22. . Then, the workpiece W is rotated around the axis C by driving and rotating the main shaft portion 21.

  The roller support moving unit 30 supports the roller 10 movably toward the outer peripheral surface of the workpiece W. The roller support moving unit 30 relatively moves the workpiece W and the roller 10 in the feed direction Z. In the present embodiment, the roller support moving unit 30 supports the roller 10 so as to be movable in an x direction that is a direction orthogonal to the axis C and a z direction that is a direction parallel to the axis C. In the present embodiment, the direction toward the outer peripheral surface of the workpiece W is one direction in the x direction, and the feed direction Z is one direction in the z direction. The roller support moving unit 30 moves the roller 10 in the feed direction Z by a predetermined feed amount Q during processing. In the present embodiment, the feed amount Q is the amount of movement of the roller 10 in the feed direction Z per rotation of the workpiece W. At the time of machining, if the feed amount Q is reduced, the aesthetics of the machined surface can be improved, but the machining time is lengthened, and if it is increased, the machining time can be shortened but the finished surface is roughened.

  Further, as shown in FIG. 2, in this embodiment, two (31, 32) roller support moving units 30 are provided, and three rollers (10A, 10B, 10C) are provided. Yes. Each of the roller support moving units 31 and 32 includes a stage (not shown) capable of biaxial plane movement in the x direction and the z direction. The roller support moving units 31 and 32 are movable at a predetermined moving speed in each of the x direction and the z direction. The roller support moving parts 31 and 32 are arranged to face each other with the axis C interposed therebetween. Of the two roller support moving parts 31, 32, one roller support moving part 31 supports one roller 10A. The roller support moving unit 31 supports the roller 10A in such a manner that the extension line of the movement locus of the point P1, which is the center of the roller 10A when moving in the x direction, intersects the axis C. The other roller support moving part 32 supports two rollers 10B and 10C. The roller support moving unit 32 supports the rollers 10B and 10C in a form in which an imaginary straight line passing through the centers of the two rollers 10B and 10C is orthogonal to the x direction. Further, the roller support moving unit 32 is configured such that the extension line of the movement locus of the point P2, which is the midpoint of the virtual line segment connecting the centers of the two rollers 10B and 10C when moving in the x direction, intersects the axis C. Two rollers 10B and 10C are supported. The two roller support moving parts 31 and 32 are arranged in such a manner that the point P1 and the point P2 face each other across the axis C on the orthogonal plane of the axis C, and the rollers 10A, 10B, and 10C are They are arranged around the axis C at substantially the same position in the axis C direction (x direction).

  The roller 10 is provided to be rotatable around a predetermined rotation axis. In this embodiment, the rotation axis of the roller 10 is an axis parallel to the axis C. As described above, in the present embodiment, three rollers 10 are provided and are distributed and supported by the two roller support moving units 30. As shown in FIGS. 3 and 4, each roller 10 includes a forming surface portion 11, a first flank portion 12, and a second flank portion 13. The roller 10 forms ridges D1 and D2. The ridge portion D1 is a boundary portion between the molding surface portion 11 and the first flank surface portion 12. The ridge portion D <b> 2 is a boundary portion between the first flank portion 12 and the second flank portion 13. The molding surface portion 11 is formed in a tapered shape whose diameter increases toward the rear in the feed direction Z. In the present embodiment, the taper angle θ1 of the molding surface portion 11 is 15 °.

  The first flank portion 12 is formed continuously at the rear end of the molding surface portion 11. Further, the first flank portion 12 is formed in a taper shape that decreases in diameter toward the rear in the feed direction Z. In the present embodiment, the taper angle θ2 of the first flank portion 12 is 3 °. In the present embodiment, the first flank 12 is formed with a length L in the feed direction Z. The length L of the first flank 12 is larger than the feed amount Q, which is the amount of movement in the feed direction Z per rotation of the workpiece W during machining, and is set to about twice.

  The second flank portion 13 is formed continuously with the rear end of the first flank portion 12. The second flank portion 13 is formed in a taper shape having a taper angle larger than the taper angle of the first flank portion 12 and having a diameter reduced toward the rear in the feed direction Z. In the present embodiment, the taper angle θ3 of the second flank portion 13 is 15 °, which is larger than the taper angle θ2 of the first flank portion 12.

  Next, the operation of the rotary plastic working roller 10 and the rotary plastic working apparatus 1 according to the present embodiment will be described. In processing the workpiece W, first, the workpiece W is inserted into the mandrel portion 22 of the workpiece support portion 20. Next, the mandrel part 22 is moved toward the main shaft part 21 to clamp the workpiece W between the chuck part 21 </ b> A of the main shaft part 21. Then, the spindle portion 21 is driven to rotate the workpiece W around the axis C. In this state, each roller support moving unit 30 is moved in the x direction, and each roller 10 is brought into contact with the outer peripheral surface S1 of the workpiece W (see FIG. 5). The roller 10 in contact with the workpiece W rotates in the direction opposite to the rotation direction of the workpiece W as the workpiece W rotates about the axis C.

  Then, when each roller support moving portion 30 is further moved in the x direction in a state where each roller 10 is in contact with the outer peripheral surface S1 before processing the workpiece W, each roller 10 is pressed against the outer peripheral surface of the workpiece W. At the same time, the workpiece W is plastically deformed according to the pressing amount, the thickness t1 on the outer peripheral surface S1 before processing is reduced, and a reduced diameter portion is formed on the workpiece W. At this time, although the workpiece W is pressed from three directions by the three rollers 10 (see FIG. 2), the radial loads from the respective rollers 10 cancel each other because the rollers 10 are pressing from different directions. Thereby, the misalignment of the workpiece W from the axis C is suppressed.

  In addition, as shown in FIG. 3, the site | part where a diameter becomes the largest in each roller 10 is the edge part D1. Therefore, the portion of the roller 10 that first comes into contact with the outer peripheral surface of the workpiece W when the roller support moving portions 30 are moved in the x direction is the ridge portion D1. The workpiece W is reduced in diameter according to the distance between the ridge portion D1 of the roller 10 and the axis C.

  Next, when each roller support moving portion 30 is moved in the feed direction Z in this state, the outer peripheral surface of the workpiece W is further plastically deformed along the direction of the axis C by the molding surface portion 11 of each roller 10. As a result, a reduced diameter portion having a thickness t2 is formed with a width corresponding to the amount of movement of the roller 10 in the feed direction Z (see FIG. 5). At this time, since the first flank portion 12 suppresses the swell of the outer peripheral surface of the workpiece W on the rear side of the ridge portion D1, the outer peripheral surface S2 of the workpiece W after processing has a good appearance. In addition, as described above, the feed amount Q at the time of processing the roller 10 and the length L in the feed direction Z of the first flank portion 12 are set to 1: 2, so that the first flank portion 12 causes a ridge. Swelling of the processed surface on the rear side in the feed direction Z with respect to the portion D1 is reliably suppressed.

  Next, formation of the tapered surface portion will be described. As shown in FIG. 5, in order to form the tapered surface portion ST on the outer peripheral surface of the workpiece W, the roller 10 is moved by the feed amount Q and simultaneously moved in the pressing direction x direction. As a result, a tapered surface portion ST having a taper angle θ4 having an inclination corresponding to the ratio between the feed amount Q of the roller 10 and the pressing amount in the x direction is formed.

  In the formation of the tapered surface portion ST, the roller 10 includes the second flank surface portion 13 having a taper angle θ3 larger than the taper angle θ2 of the first flank surface portion 12, so that the taper angle θ2 of the first flank surface portion 12 is larger. It is possible to form a tapered surface portion ST having a large taper angle on the outer peripheral surface of the workpiece W. In the formation of the tapered surface portion ST, when the taper angle θ4 of the tapered surface portion ST of the workpiece W is larger than the taper angle θ2 of the first flank surface portion 12, the tapered surface portion ST is formed by the ridge portion D2 of the roller 10. Is done. The ridge portion D2 is a connection portion between the first flank portion 12 and the second flank portion 13. Thus, in the formation of the tapered surface portion ST on the outer peripheral surface of the workpiece W by the roller 10, the taper angle θ4 can be formed with a size of 0 <θ4 ≦ θ3, which is larger than the taper angle θ2 of the first flank portion 12. It can be formed with a large taper angle.

  As described above, the rotary plastic working roller 10 according to the present embodiment includes the molding surface portion 11, the first flank portion 12, and the second flank portion 13. The molding surface portion 11 is formed in a tapered shape whose diameter increases toward the rear in the feed direction Z. The first flank portion 12 is formed continuously at the rear end of the molding surface portion 11. Further, the first flank portion 12 is formed in a tapered shape with a diameter decreasing toward the rear in the feed direction Z. The second flank portion 13 is formed continuously with the rear end of the first flank portion 12. Further, the second flank portion 13 is formed in a taper shape having a taper angle θ3 larger than the taper angle θ2 of the first flank portion 12 and having a diameter reduced toward the rear in the feed direction Z.

  With such a configuration, the roller 10 can set the taper angle θ2 of the first flank portion 12 to an angle at which the machined surface can obtain a good appearance, and the taper angle θ3 of the second flank surface portion 13 can be set to the machined surface. It can set to the angle which can obtain the taper surface of a desired angle. That is, the taper angle θ2 of the first flank portion 12 can be set to an angle that can suitably suppress the bulge of the processed surface due to plastic deformation, regardless of the angle θ4 of the tapered surface portion ST formed on the processed surface. Thus, it is possible to obtain a processed surface with good aesthetics in which unevenness is suppressed. Further, the taper angle θ3 of the second flank portion 13 can be set to an angle suitable for forming the taper angle θ4 of the processed surface.

  Therefore, the rotary plastic working roller 10 of the present embodiment can achieve both the aesthetics of the machined surface and the workability of the tapered surface.

  Further, in the rotary plastic working roller 10 of the present embodiment, the length L of the first flank portion 12 in the feed direction Z is the amount of movement in the feed direction Z per rotation of the workpiece W during machining. It is set to be larger than the amount Q. For this reason, the swell of the machined surface due to plastic deformation can be surely suppressed by the first flank portion 12 having a length L larger than the feed amount Q at the time of machining, and a machined surface with better appearance can be obtained. Can do.

  In addition, by suitably suppressing the bulge of the processed surface due to plastic deformation by the first flank portion 12, a processed surface having an aesthetic appearance equivalent to the processed surface by the conventional roller such as Patent Document 1 described above can be obtained with a larger feed amount Q. Since it can be obtained, the processing time can be shortened. As a result, it is possible to achieve both the beauty of the processed surface and the reduction of the processing time.

  The rotary plastic working apparatus 1 according to the present embodiment includes a work support part 20, a rotary plastic working roller 10, a roller support part, and a roller support moving part 30 as a relative moving part. The workpiece support unit 20 rotates around the axis C as a predetermined rotation axis while supporting the workpiece W to be processed. The roller support moving unit 30 moves the roller 10 in the feed direction Z as a relative movement in the feed direction Z between the work W and the roller 10 while moving the roller 10 toward the outer peripheral surface of the work W while rotatably supporting the roller 10. Let

  As described above, the rotational plastic working device 1 of the present embodiment includes the rotational plastic working roller 10, and thus can perform processing that achieves both the aesthetics of the processed surface and the workability of the tapered surface.

  Moreover, the rotational plastic working apparatus 1 of this embodiment is provided with a plurality of rotational plastic working rollers 10. For this reason, the processing surface of a more favorable aesthetics can be obtained.

The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, the rotary plastic working roller is illustrated in a form in which the taper angle of the first flank portion and the taper angle of the second flank portion are 3 ° and 15 °, respectively, but these are not essential. As for each taper angle of the first flank portion and the second flank portion, various forms can be selected as long as the taper angle of the second flank portion is set larger than the taper angle of the first flank portion. In particular, the taper angle θ2 of the first flank portion is preferably in the range of 0 ° <θ2 ≦ 5 °.
(2) In the above embodiment, the length in the feed direction of the first flank portion is about twice as large as the feed amount during machining, which is the amount of movement in the feed direction per rotation of the workpiece to be machined during machining. Although set, this is not required. When the length L in the feed direction of the first flank portion is set larger than the feed amount Q at the time of machining, the range of 1.5Q ≦ L ≦ 2.5Q can be set. In this case, it is preferable that the first flank portion can satisfactorily suppress the bulge caused by plastic deformation of the processed surface.
(3) In the said embodiment, although the rotational plastic processing apparatus illustrated the form provided with the roller for three rotational plastic processing, this is not essential. The rotary plastic working apparatus may be configured to include one, two, or four or more rollers.
(4) In the above-described embodiment, the roller support moving unit as the relative moving unit is provided and the roller is moved to move the workpiece and the roller relative to each other in the feed direction. It may be a moving unit.
(5) In the above-described embodiment, an example in which two roller support moving parts are provided for three rollers is illustrated, but a plurality of roller support moving parts corresponding to each of a plurality of rollers may be provided.
(6) In the above-described embodiment, the rotating shaft of the roller is illustrated as being parallel to the axis C. However, the roller C may be inclined with respect to the axis C.
(7) In the above-described embodiment, an example in which a plurality of rollers are arranged around the axis C at substantially the same position in the axis C direction (x direction) is illustrated. However, the plurality of rollers are arranged offset in the axis C direction. It may be in the form.

  DESCRIPTION OF SYMBOLS 1 ... Rotary plastic processing apparatus, 10 (10A, 10B, 10C) ... Roller for rotational plastic processing, 11 ... Molding surface part, 12 ... 1st flank part, 13 ... 2nd flank part, 20 ... Work support part, 21 ... Main shaft , 21A ... chuck part, 22 ... mandrel part, 22A ... one end of the mandrel part, 22B ... the other end of the mandrel part, 30 (31, 32) ... roller support moving part, C ... axis (axis that is the rotation center of the workpiece) ), D1, D2... Edge, P1... Point (center point of roller 10A), P2... Point (midpoint of line connecting the centers of rollers 10B and 10C), Q. Outer peripheral surface, S2 ... Workpiece outer peripheral surface, ST ... Workpiece taper surface portion, W ... Workpiece, Z ... Feed direction, t1 ... Thickness before processing, t2 ... Thickness after processing, θ1 ... Taper of molding surface portion Angle, θ2: taper angle of first flank portion, θ3: first Taper angle of the relief surface, the taper angle of the tapered surface portion of θ4 ... work

Claims (4)

A molding surface portion formed in a tapered shape whose diameter increases toward the rear in the feed direction;
A first flank portion formed continuously with the rear end of the molding surface portion and formed in a tapered shape with a diameter decreasing toward the rear in the feeding direction;
The second flank is formed continuously with the rear end of the first flank face and has a taper angle larger than the taper angle of the first flank face and is tapered toward the rear in the feed direction. A roller for rotational plastic working, comprising a flank portion.   2. The rotational plasticity according to claim 1, wherein a length of the first flank portion in the feed direction is set to be larger than a movement amount in the feed direction per one rotation of a workpiece to be machined during machining. Processing roller. A workpiece support section that rotates around a predetermined rotation axis while supporting the workpiece to be processed;
A roller for rotational plastic working according to claim 1 or 2,
A roller support portion that moves toward the outer peripheral surface of the workpiece while rotatably supporting the rotary plastic working roller;
A relative movement unit that relatively moves the workpiece and the rotary plastic working roller in the feed direction;
A rotary plastic working apparatus comprising:   The rotary plastic working apparatus according to claim 3, comprising a plurality of the rotary plastic working rollers.

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