JP4751976B2 - Groove processing equipment for metal pipe members - Google Patents

Description

  The present invention relates to a groove processing apparatus for setting a metal pipe member on a jig and forming a groove having a predetermined shape on the axis by partially pressing in a direction intersecting the axis of the pipe member. Is.

When a headrest stay for an automobile is exemplified as a product formed from a metal pipe member, the metal pipe member is bent into a U-shape as shown in FIG. 1 to 6 free grooves g ₁ having a shape and one or two stopper grooves g ₂ having a U-shape for preventing headrest detachment are partially recessed in the side surface of one longitudinal axis portion. In addition, the ratchet pawl is configured to be able to be locked or detached.

  If a broach or slicing with a cutting blade is applied to form the groove on the side surface of the pipe member, a groove with a specified shape can be easily formed, but not only chips are generated and trauma is likely to occur, but also the meat. Decrease in rigidity due to thickness cutting.

  For forming the groove on the pipe member, the punch is formed in a curved shape by matching the tip side to the groove shape (Patent Document 1), and the forming blade is formed in a wedge shape by matching the tip side to the groove shape (Patent Document 2). Is moved downward from the direction orthogonal to the axis of the pipe member to press each groove, and the punch (Patent Document 3) is obliquely chamfered with the axis of the pipe member by obliquely chamfering the tip side according to the groove shape. It has been proposed to press form each groove by moving it downward from the side to the side.

  In the pressing process, the groove is formed by the tension that pushes the pressure from the punch directly onto the side of the pipe member and pushes the side into the radial direction, so the pressure from the punch acts on the edge of the groove, and the flatness of the outer periphery Since the (roundness) is greatly changed, a large sagging occurs at the edge of the groove.

  Other than the press molding alone, it is proposed that the blade tip is pressed against the side surface of the pipe member while rotating the punch and the groove is preformed, and then a part of the wall thickness is shaved by shaving with a press punch. (Patent Document 4).

  In the groove processing device, the punch is moved from the direction orthogonal to the axis of the pipe while rotating the punch, and the cutting edge is pressed against the side surface of the pipe member. It is difficult to properly match the rotation and movement. Also, since different tools are individually operated to form grooves, it is difficult to accurately operate the press punch in accordance with the shape of the preformed grooves, and chips are generated due to thick cutting, A reduction in rigidity is inevitable.

  In combination with the above-described press molding, it has also been proposed to insert a cored bar provided with a notch corresponding to the groove shape on the axis within the diameter of the pipe member (Patent Document 5).

  When the cored bar is used in combination, it takes a lot of time to put in and out the cored bar, so that the productivity of the product is inferior and the outer peripheral flatness (roundness) or the groove that can be satisfied from the sagging of the molded cross section is satisfactory. Can not form.

  In addition, the groove is swaged by a molding tool having a tip shape corresponding to a predetermined groove shape attached to the tip of the spindle by causing an oscillating motion by an epicycloid mechanism and a ball joint to the spindle. It has also been proposed to form the shape (Patent Document 6).

In the swaging process, as compared with press molding, the forming tool acts to gradually indent the side surface of the pipe member into a predetermined groove shape, so that the occurrence of sagging around the edge of the groove can be suppressed. However, since the epicycloid mechanism is mechanically complicated and expensive, the product cost increases.
JP 2001-239340 A Japanese Patent Laid-Open No. 2001-18014 JP 2002-204733 A JP 2002-210519 A JP 2002-120022 A JP 2000-51957 A

  The problem to be solved by the present invention is that the flatness (roundness) of the outer periphery is maintained regardless of the cutting in which the chips are generated and the core metal is not inserted into the diameter of the pipe member. Therefore, it is possible to form a groove processing apparatus that can suppress the occurrence of sagging at the edge of the groove and can accurately form a groove having a predetermined shape on the side surface of the pipe member with a simple mechanism.

The invention according to claim 1 of the present application provides a plurality of idle rotations in which a jig for setting a metal pipe member and a protruding tooth having a contour shape corresponding to shaping a groove having a predetermined shape are provided on the circumferential surface. A roller , a roller holder in which the idle rollers are arranged in series and supported by a roller shaft, and a power means for moving the roller holder toward a metal pipe set in a jig, intersecting the axis of the pipe member In a groove processing apparatus for shaping a groove having a predetermined shape with a plurality of idle rollers in a direction to be
A leading roller provided on the circumferential surface with a ridge tooth that forms a V-shaped groove that is shallower and narrower than the final groove, and a ridge tooth that deeply shapes the groove side of the groove formed by the leading roller. A first intermediate roller provided on the circumferential surface, and a ridge tooth provided on the circumferential surface that forms a flat surface on the back side of the wide groove on the groove opening side formed by the first intermediate roller . Circular ridge teeth that shape the groove formed by the second intermediate roller and the second intermediate roller until the groove depth, flat surface width, and inclined surface length approach the groove shape of the final groove. Containing a third intermediate roller provided on the peripheral surface as a plurality of intermediate rollers, and having a profile tooth corresponding to forming a final groove from a groove formed by the third intermediate roller. end roller comprises a leading roller, the axis in a plurality of intermediate rollers, sequentially serially aligned roller holder to the end roller which is provided with Characterized in that equipped with a roller train of supporting the idle rollers.

The invention according to claim 2 of the present application includes a first intermediate roller provided with protruding teeth on the circumferential surface that are formed deeply on the groove side of the V-shaped groove formed by the leading roller, and a first intermediate roller The groove back side of the wide V-shaped groove on the groove opening side formed in the shape of a flat surface is flattened, one slant surface of the wide V-shaped groove on the groove mouth side is a vertical surface , and the other sloping surface is gentler than the groove back side. A second intermediate roller having protrusions shaped as an inclined surface having an upward slope on the circumferential surface, and a groove formed by the second intermediate roller , the depth of the groove, the width of the flat surface, and the inclination It includes a third intermediate roller with a plurality of intermediate rollers provided with protruding teeth on the circumferential surface that are formed until the length of the surface approaches the substantially square shape of the final groove, and is shaped by the third intermediate roller. End roller provided with contoured ridge teeth corresponding to forming a substantially groove-shaped final groove from the shaped groove Characterized in that it was equipped.

The invention according to claim 3 of the present application includes a first intermediate roller provided with a protruding tooth on the circumferential surface that deeply forms the groove side of the V-shaped groove formed by the leading roller, and a first intermediate roller a second intermediate roller provided on the circumferential surface of the ridge teeth shaping a flat surface a groove inner side of the wide V-shaped groove of the shaped groove opening side by being shaped by the second intermediate roller A plurality of third intermediate rollers having projecting teeth provided on the circumferential surface for shaping the groove until the depth of the groove, the width of the flat surface, and the length of the inclined surface approach the substantially U-shape of the final groove. It is provided with a tail roller that is provided as an intermediate roller and is provided with contoured teeth corresponding to the shape of a substantially U-shaped groove formed from the groove formed by the third intermediate roller. characterized in that was.

In the invention according to claim 4 of the present application, the roller row according to claim 2 and the roller row according to claim 3 are arranged in parallel with each other, and a plurality of final grooves having different shapes are arranged in each roller row. And a roller row of idling rollers that can be formed simultaneously .

  In the groove processing apparatus for a metal pipe member according to claim 1 of the present application, a thin V-shaped groove is formed by a leading idler roller, and the width direction and depth are determined by the next idler roller on the basis of the V-shaped groove. Since the groove shape is formed by multiple idle rollers so that the groove shape gradually approaches the predetermined groove shape by applying a pressure spreading in the direction, the pressure due to the idle teeth of the idle roller is surely applied to the shaped portion of the groove Since the grooves are formed so as to be concentrated and gradually advanced to the designated shape, deformation of the outer periphery can be suppressed, and the occurrence of sagging at the edge of the groove can be suppressed to accurately form the final shape of the groove.

  In the groove processing apparatus for a metal pipe member according to claim 2 of the present application, a thin V-shaped groove is formed by the leading idler roller, and the groove shape is gradually changed to a predetermined L-shaped shape based on the V-shaped groove. Forming with multiple idle rollers so as to be close to the surface, the pressure by the idle teeth of the idle roller is surely concentrated on the shaped part of the groove, and the groove is gradually advanced to the specified letter shape Accordingly, deformation of the outer periphery can be suppressed, and the occurrence of sagging at the edge of the groove can be suppressed to accurately shape the letter-shaped groove.

  In the apparatus for processing a groove for a metal pipe member according to claim 3 of the present application, a thin V-shaped groove is formed by a leading idler roller, and the groove shape is gradually changed to a predetermined U-shape with reference to the V-shaped groove. Forming with multiple idle rollers so as to be close to the surface, the pressure by the idle teeth of the idle roller is concentrated on the groove shaping part and the groove is gradually advanced to the specified U-shape. Therefore, the deformation of the outer periphery can be suppressed, and the occurrence of sagging at the edge of the groove can be suppressed to accurately shape the U-shaped groove.

  In the groove processing apparatus for a metal pipe member according to claim 4 of the present application, the shape of providing a plurality of roller rows according to claim 2 and a roller row according to claim 3 on the axis of the pipe member is different. Since it is equipped with a means for forming grooves simultaneously, it can be processed in a single step to improve product productivity even if it requires both a groove and a U-shaped groove such as a headrest stay. Enhanced.

As shown in FIG. 1, the apparatus for processing a groove for a pipe member according to the illustrated embodiment has a jig 1 for setting a metal pipe member P and a contour shape corresponding to forming a predetermined groove. A plurality of idling rollers 10 ( only one shown; the same applies to FIGS. 2 and 3 below ) and the idling rollers 10 arranged in series are supported by a roller shaft 2a. The roller holder 2 and a movable holder 3 of power means for moving the roller holder 2 toward the metal pipe member P set on the jig 1 are provided.

  As the idling roller 10, a roller made of alloy tool steel (JIS standard: SKD11, HRC58 ± 1.0) or cemented carbide is provided.

  As shown in FIG. 2, the idle roller 10 is supported by a support shaft 2 a that fits tightly with a center hole that is opened on the side surface of the roller, and the support shaft 2 a is fixed between the side surfaces of the roller holder 2. It is held by a roller holder 2. The roller holder 2 is formed so as to exhibit an inverted concave section capable of accommodating the idling roller 10 by partially exposing the protruding teeth of the idling roller 10 from the lower open side.

  The movable holder 3 is provided to hold the roller holder 2 on the rear end side and move the idle roller 10 horizontally from the orthogonal direction toward the axis of the pipe member P by servo drive or hydraulic servo drive.

  The set jig 1 is provided with a gate 1a that slides and guides the idle roller 10 with the roller holder 2 so as to penetrate therethrough. The gate 1a is provided in a quadrilateral cavity shape that is in sliding contact with both side surfaces from the top surface of the roller holder 2 and that is not in sliding contact with the bottom surface where the protruding teeth of the idle roller 10 are exposed. In the setting jig 1, a bearing hole 1b through which the pipe member P is inserted is provided in a direction intersecting the gate 1a. The bearing hole 1b is provided in a shape in which the side surface forming the groove of the pipe member P is partially exposed in the cavity of the gate 1a.

  In this groove processing apparatus, as shown in FIG. 3, the pipe member P is inserted into the bearing hole 1 b of the setting jig 1 and positioned and held, and then the idling roll 10 is directed toward the axis of the pipe member P by the movable holder 3. Since it moves from the side in the orthogonal direction, a groove having a predetermined shape can be formed on the side surface of the headrest stay S by the protruding teeth of the idle roll 10 exposed from the bottom surface of the roller holder 2.

As the idling roller, those having a substantially rectangular groove as shown in FIGS. 4 to 7 and those having a substantially U-shaped groove as shown in FIGS. 8 to 10 and 10 ′. ~ 14 'are provided .

As shown in FIG. 4, the idle rollers 10 to 14 having a substantially letter-shaped groove are provided with two V-shaped protruding teeth 10a and 11a raised from the center of the circumferential surfaces 10b and 11b. The idle rollers 10 and 11 and the protruding teeth 12a to 14a, which are substantially trapezoidal cross-sectional ring surfaces having a tapered shape on one side from the substantially upright standing surface at the center, are provided on substantially half of the circumferential surfaces 12b to 14b. The idling rollers 12 to 14 are provided.

  The idling rollers 10 to 14 are positioned at the head of the idling roller 10 provided with V-shaped protruding teeth 10a in the moving direction X of the roller row, and the idling rollers 11 to 13 aligned after the idling roller 10 are as follows. Aligned ones provided with projecting teeth 11a to 13a of different shapes gradually approaching the predetermined groove shape, and as the last idling roller 14, a protruding tooth 14a having substantially the same shape as the predetermined groove shape is provided. The provided ones are arranged to align.

As the leading roller 10 and the first to third intermediate rollers 11 to 13, as shown in FIGS. 5 and 6, the circumferential surfaces 10 b to 13 b have the same diameter <φ _{1 to} φ so that the side surfaces of the pipe members do not slide. ₄ is provided. On the other hand, as the last roller 14, rollers having a large diameter <φ _{1 to} φ ₄ <φ _{5 in} which the circumferential surface 14 b can be brought into sliding contact with the side surface of the pipe member are arranged.

Comparing the V-shaped protruding teeth 10a and 11a provided on the leading and first intermediate rollers 10 and 11, the leading roller 10 has a protruding tooth 11a of the first intermediate roller 11 as shown in FIG. Also, the same protruding tooth 10a having a narrow base width w ₁ <w ₂ , a rising height h ₁ = h ₂ , and a curved surface r ₁ = r ₂ of the protruding end is provided.

Comparing the substantially trapezoidal shaped protrusion teeth 12a to 14a having a tapered ring surface from a substantially central wide standing surface provided on the second and third intermediate rollers 12, 13 and the last roller 14, As shown in FIG. 6, in the order of the rollers 12 to 14, the flat protrusion width w ₃ <w ₄ <w ₅ of the standing surface gradually increases, and the inclination angle θ ₁ > θ ₂ > θ _{3 of the} ring surface becomes The ridge teeth 12a-14a which become gradually small are provided.

In these idle rollers 10 to 14, shaped in the groove _{g 11} based on the V-shaped grooves _{g 10,} which was widely shaping the groove opening side of the V-shaped grooves _{g 10} to form with the beginning roller 10, as shown in Figure 7 and, then shaped into the groove to the groove opening side wide V-shaped groove g groove deep side to the flat surface _11, a piece slope of the V-grooves g ₁₁ as a vertical surface, grooves of other slopes of the V-grooves and shaped as a groove g ₁₂ to the inclined surface of the gentle upslope from the back, further, the groove inner side of the depth, so as to form with the length of the flat width and inclined surface to a predetermined shape near the groove g ₁₃ from close slowly groove shape into a predetermined groove shape, finally, it can be shaped with a predetermined nearby groove shape to the grooves g ₁₄ of a predetermined shape.

The idling rollers 10 to 14 idle in the direction opposite to the moving direction, so that no extra friction is generated, the idling roller 14 is in sliding contact with the side surface of the pipe member P, and the pressure applied by the protruding teeth 10a to 14a is applied. Designed to concentrate on the shaped part of the groove and suppress the deformation of the outer periphery, and to advance the groove to the specified shape, so that the flatness (roundness) of the outer periphery is maintained and there is no sagging at the edge of the groove Les of shaped groove can be accurately formed as a groove g ₁₄ shape.

  As the idle rollers 10 to 14 move, the roller holder 2 slides on both sides from the top surface of the gate 1a, so that the idle rollers 10 to 14 can be horizontally guided by the gate 1a. Further, in order to prevent the escape of the protrusion teeth 10a to 14a of the idle rollers 10 to 14 from biting into the side surface of the pipe member P, the groove can be formed by pressing the side surface of the pipe member P while maintaining a predetermined pressure. The shape can be shaped as desired.

  When manufacturing a headrest stay from a metal pipe member, a seamless pipe member or an electric sewing pipe member made of a high-strength alloy having a wall thickness of 1.3 to 2.0 mm and a diameter of about 13 mm is used. For this metal pipe member, the sagging is within 0-0.5 mm, the flatness of the outer periphery is within 0.05 mm (roundness: about ± 0.03 mm), and the depth: 1.5- A groove of 2.5 mm, thinnest part: 0.6 mm or more can be provided.

As the idling roller for forming the U-shaped groove, idling rollers 10 ′ to 14 ′ provided with protruding teeth 10a ′ to 14a ′ having different shapes as shown in FIGS. 8 and 9 are provided. As the idle rollers ₁₀ ′ to 13 ′, those having the same diameter <φ ₁ ′ to φ ₄ ′ in which the circumferential surfaces 10 b ′ to 13 b ′ are not in sliding contact with the side surface of the pipe member are provided. As the idling roller 14 ′, a roller having a large diameter φ _{1 to} φ ₄ <φ _{5 in} which the circumferential surface 14 b ′ is in sliding contact with the side surface of the pipe member is provided.

Comparing the V-shaped protruding teeth 10a ′ and 11a ′ provided on the idle rollers 10 ′ and 11 ′, the idle roller 10 ′ is idle as shown in FIG. The roller 11 ′ has a base width w ₁ ′ <w ₂ ′ narrower than the protruding teeth 11a, and has a rising height h ₁ ′ = h ₂ ′ and a curved surface r ₁ ′ = r ₂ ′ of the protruding end. The same protruding tooth 10a ′ is provided.

Comparing the substantially U-shaped protruding teeth 12a ′ to 14a ′ provided on the idle rollers 12 ′ to 14 ′, as shown in FIG. 9, the protrusion widths w ₃ ′ <w _{4 in} the order of the idle rollers 12 ′ to 14 ′. _{'<w 5'} becomes gradually wider, and, the projecting end of the flat width is _{r 3 '<r 4'<} r 5 ' is gradually wider ridge teeth 12A'～14a' is provided.

These idle rollers 10'～14 based on 'In, V-shaped grooves g ₁₀ to form with at idle roller 10 of the head as shown in Figure _10', it was wider shaping the groove opening side of the V-shaped grooves g _{10 '} The groove g ₁₁ ′ is shaped, and then the groove shape is determined by the ridge teeth 12 a ′ and 13 a ′ so that the depth and flat width of the groove deep side are formed by the ridge teeth to the vicinity of the predetermined groove shape. After gradually approaching the groove shape, the groove shape near the predetermined shape is finally shaped to the predetermined groove shape by the protruding teeth 14a.

The idle rollers 10 ′ to 14 ′ also idle in the direction opposite to the moving direction, so that no unnecessary friction is generated, and the idle roller 14 ′ is in sliding contact with the side surface of the pipe member P and the protruding teeth 10a ′ to 10a. 14a 'concentrates on the shaped part of the groove to suppress the deformation of the outer periphery, and the groove is formed to advance to the specified shape, so that the flatness (roundness) of the outer periphery is maintained and the edge of the groove The U-shaped groove can be accurately formed as the groove g ₁₄ ′ having a specified shape without sagging.

  Although five idle rollers are arranged in series, the number of idle rollers is not limited to this, and the number can be appropriately selected and designed from the shape of the groove, the accuracy of the shape, the material of the pipe member, and the like.

  In the above-described embodiment, it has been described that a groove having a predetermined shape is provided on the axis of the pipe member based on the case where the headrest stay is manufactured. However, hand brakes and other products are manufactured from the pipe member. In this case, the present invention can also be applied to providing a groove having a predetermined shape on the axis of the pipe member.

It is a side view which shows the processing apparatus of the groove | channel with respect to metal pipe members provided with the idle roller which concerns on this invention. It is sectional drawing which shows the groove processing apparatus of FIG. 1 by the AA line. It is explanatory drawing which shows the groove processing apparatus of FIG. 1 in an operation state. It is explanatory drawing which shows the some idling roller with which the processing apparatus of the groove | channel with respect to the metal pipe members which concern on this invention is equipped. It is explanatory drawing which compares the roller row | line | column of FIG. 4 with a V-shaped protrusion tooth. It is explanatory drawing which compares the roller row | line | column of FIG. 4 with a frustoconical protrusion tooth. It is explanatory drawing which shows the shape of the groove | channel formed by the idle roller of FIG.5 and FIG.6. It is explanatory drawing which compares the roller row | line | column which forms the groove | channel of a different shape from the roller row | line | column of FIG. It is explanatory drawing which compares the roller row | line | column of FIG. 8 with a protruding tooth. It is explanatory drawing which shows the shape of the groove | channel formed by the idle roller of FIG.8 and FIG.9. It is a perspective view which shows the headrest stay which concerns on a general example.

1 set jig
2 roller holder
3 Power means 10-14 Reciprocating grooved idle roller 10a-14a Projection tooth of idle roller 10b-14b Circumferential surface of idle roller

10 'to 14' U-shaped grooved idle rollers 10a 'to 14a' Projection teeth of idle rollers 10b 'to 14b' Circumferential surfaces of idle rollers

Claims (4)

A jig for setting a metal pipe member, a plurality of idle rollers provided on the circumferential surface with projecting teeth having a contour corresponding to forming a predetermined groove, and the idle rollers in series. A roller holder that is supported by a roller shaft side by side, and a power unit that moves the roller holder toward a metal pipe set on a jig, and a plurality of grooves having a predetermined shape are formed in a direction intersecting the axis of the pipe member. In a groove processing device for shaping with an idle roller ,
A leading roller provided on the circumferential surface with a ridge tooth that forms a V-shaped groove that is shallower and narrower than the final groove, and a ridge tooth that deeply shapes the groove side of the groove formed by the leading roller. A first intermediate roller provided on the circumferential surface, and a ridge tooth provided on the circumferential surface that forms a flat surface on the back side of the wide groove on the groove opening side formed by the first intermediate roller . Circular ridge teeth that shape the groove formed by the second intermediate roller and the second intermediate roller until the groove depth, flat surface width, and inclined surface length approach the groove shape of the final groove. Containing a third intermediate roller provided on the peripheral surface as a plurality of intermediate rollers, and having a profile tooth corresponding to forming a final groove from a groove formed by the third intermediate roller. end roller comprises a leading roller, the axis in a plurality of intermediate rollers, sequentially serially aligned roller holder to the end roller which is provided with Groove machining apparatus for the pipe member, characterized in that it equipped with a roller train of supporting the idle rollers. A first intermediate roller provided with a protruding tooth on the circumferential surface deeply forming the groove side of the V-shaped groove formed by the leading roller, and a wide V on the groove side formed by the first intermediate roller The groove back side of the groove is shaped as a flat surface, and one side of the wide V-shaped groove on the groove side is a vertical surface , and the other slope is shaped as an inclined surface with a gentle upward slope from the groove back side. The groove formed by the second intermediate roller with the protruding teeth on the circumferential surface and the groove formed by the second intermediate roller are the depth of the groove, the width of the flat surface, and the length of the inclined surface. A third intermediate roller having a plurality of intermediate rollers provided with protruding teeth on the circumferential surface, which are shaped until the shape approaches the shape, and is substantially rounded from the groove shaped by the third intermediate roller. characterized in that a groove shaped for final shape equipped with end rollers provided with protrusions teeth corresponding contour shape to shape Groove machining apparatus for the pipe member according to Motomeko 1. A first intermediate roller provided with a protruding tooth on the circumferential surface deeply forming the groove side of the V-shaped groove formed by the leading roller, and a wide V on the groove side formed by the first intermediate roller A groove formed by the second intermediate roller with the second intermediate roller having protrusions on the circumferential surface that shape the groove back side of the groove into a flat surface, and the depth of the flat surface It comprises a third intermediate roller provided with protrusions teeth shape with the length in the width and the inclined surface until it approaches a substantially U-shape of the final groove to the circumferential surface as a plurality of intermediate rollers, the third intermediate roller 2. A rear roller provided with a protruding tooth having a contour shape corresponding to the shape of a substantially U-shaped groove formed from the groove formed by the step of claim 1. The groove processing apparatus for the pipe member described. A roller roller according to claim 2, wherein the roller row according to claim 2 and the roller row according to claim 3 are arranged in parallel with each other, and a plurality of final grooves having different shapes can be simultaneously formed in each roller row. An apparatus for processing a groove for a pipe member, comprising a row .

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