WO2016103963A1 - パイプ曲げ型ユニット、及び該ユニットを備えたパイプ曲げ加工装置 - Google Patents
パイプ曲げ型ユニット、及び該ユニットを備えたパイプ曲げ加工装置 Download PDFInfo
- Publication number
- WO2016103963A1 WO2016103963A1 PCT/JP2015/081923 JP2015081923W WO2016103963A1 WO 2016103963 A1 WO2016103963 A1 WO 2016103963A1 JP 2015081923 W JP2015081923 W JP 2015081923W WO 2016103963 A1 WO2016103963 A1 WO 2016103963A1
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- WIPO (PCT)
- Prior art keywords
- pipe
- bending
- groove
- fitting
- rotation axis
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
- B21D7/025—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member and pulling or pushing the ends of the work
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
- B21D37/145—Die storage magazines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
Definitions
- the present invention relates to a pipe bending die unit suitable for pipe bending and a pipe bending apparatus provided with the unit.
- Patent Document 2 regarding a wiper (shoe) provided to prevent wrinkles generated inside a bent portion of a pipe, a wiper that can cope with wear or chipping caused by sliding has been proposed (Patent Document 2). Paragraphs [0013] and [0014]). Similarly, Patent Document 3 states that “a step does not occur between the wiper and the bending die, there is no problem even if pipes of various materials are used, and there is no problem, and the life is extremely long.
- the purpose is to provide a pipe bending apparatus that does not require frequent equipment adjustment operations, and "a bending die whose outer peripheral surface is formed in an arc shape with a predetermined curvature for bending a pipe, and the bending
- a pipe bending apparatus comprising: a clamp member that clamps a pipe with a die; and a wiper that rotates the clamp member around the bending die to prevent wrinkles when bending the pipe.
- the pipe bending apparatus is characterized in that the tip of the wiper in the rotation direction of the clamp member is extended along the curvature of the outer peripheral surface of the bending die beyond the bending start point of the pipe.
- Patent Document 4 relates to a method and an apparatus for “changing die sets quickly and accurately for bending pipes of different dimensions or for different types of pipe bending operations”.
- a pre-assembled die set is provided and includes a bending die, a clamping die and a pressure die and attachable to a spindle of a tube bending table, wherein the pressure die and the clamping die are releasably connected to the bending die. And a first means for connecting to each other and the bending die in a predetermined alignment relationship, and an operating means for engaging the die set and simultaneously lifting the die including these die sets from the table. (Described on page 7 of Patent Document 4).
- Patent Document 1 it is configured so that wrinkles are positively formed.
- wrinkles are generally used.
- Patent Documents 2 to 4 A wiper is provided.
- the wipers described in Patent Documents 2 and 4 have a wedge-shaped tip portion, and in Patent Document 2, there is concern about wear of the edge portion of the tip, and countermeasures are taken.
- there is a step between the wiper and the bending die along the pipe bending start line usually the line where the surface including the rotation axis of the bending die intersects the groove inner surface of the bending die). Wrinkles due to steps cannot be avoided.
- the wiper described as one embodiment in Patent Document 3 constitutes a part of the central die portion of the bending die divided into three in the vertical direction, and is formed with a concave portion having an arcuate cross section. (Described in paragraphs [0025] to [0030] of Patent Document 3), thereby describing that “a tip portion having an edge structure does not need to be formed and there is no possibility of a step between the bending die”.
- the explanation during this time is unclear.
- the wiper for the pipe to be processed, from the start to the end of the bending process, among the bending dies divided by three planes parallel to the pipe axis, the upper and lower side die parts contribute to the bending process, and the central part serves as the wiper. If the separation operation to function is performed, not only is it difficult to prevent the generation of wrinkles, but it is also difficult to appropriately perform the bending process itself, and a configuration that enables a desired bending process is possible. There is no disclosure.
- Patent Document 4 discloses that a bending die, a clamping die, and a pressure die can be exchanged for a die set in which a bending die, a clamping die, and a pressure die are pre-assembled for bending a tube having a different size or for a different type of tube bending operation.
- the wiper die is not necessarily essential (described in page 11 of Patent Document 4). Therefore, in Patent Document 4, although attention is paid to the changeover function, a replaceable die set including a function that can appropriately prevent the generation of wrinkles is not disclosed. There is no suggestion of a suitable pipe bend mold unit and apparatus comprising the same.
- an object of the present invention is to provide a pipe bending die unit capable of appropriately bending a pipe without worrying about wrinkles. It is another object of the present invention to provide a pipe bending apparatus provided with a pipe bending die unit suitable for the bending process.
- the present invention provides a pipe bending die unit that can appropriately bend a pipe without worrying about the occurrence of wrinkles and that can be easily changed, and a pipe bending apparatus including the unit. This is another issue.
- a pipe bending die unit of the present invention comprises a bending die having a pipe receiving groove having a semicircular cross section in the outer peripheral surface and driven to rotate around a rotating shaft, A first recess having a semicircular cross section on the outer peripheral surface, and a fitting recess formed in the first recess and extending a first predetermined distance in the circumferential direction within a plane orthogonal to the rotation axis.
- a gripping member having a second groove portion having a semicircular cross section on the outer peripheral surface, and a fitting convex portion extending a second predetermined distance in the circumferential direction from the tip portion of the second groove portion, And a counter pressure member that includes a fitting convex portion that fits into the fitting concave portion and joins the first groove portion and the second groove portion to form the pipe receiving groove having a semicircular cross section.
- the fitting recess in the member is a predetermined distance including at least a radially outer end from the rotating shaft toward the radially outer side.
- the counter pressure member and the gripping member are connected by a hinge connection centered on the rotation axis, and are relatively centered on the rotation axis. It is set as the structure currently supported rotatably.
- a part of the fitting convex part is located on the front side in the traveling direction of the pipe with respect to a bending start position of the pipe, and the other part of the fitting convex part is It is good to set it as the structure located in the back side with respect to the advancing direction of the said pipe with respect to the bending start position of the said pipe.
- the fitting portion of the fitting convex portion to be fitted into the fitting concave portion is located on the front side in the advancing direction of the pipe with respect to the bending processing start position of the pipe, and the first of the gripping member It is preferable that a contact portion between the groove portion and the second groove portion of the counter pressure member is located on the rear side in the traveling direction of the pipe with respect to the bending start position of the pipe.
- the counter pressure member has an annular rotation support portion rotatably supported by the rotation shaft, and a part of the rotation support portion constitutes the fitting convex portion, and an outer peripheral surface of the rotation support portion
- the counter pressure member and the gripping member may be hinged by a shaft member having a central axis through which the fitting recess is inserted.
- the fitting recess in the gripping member is a predetermined distance region including a radially inner end portion from the rotating shaft toward the radially outer side, and the both end surfaces are the rotating shaft. It is good to set it as the structure which has a parallel end surface area
- the widened end surface region may be configured to be inclined by 2 ° to 5 ° with respect to a plane orthogonal to the rotation axis.
- the pipe is mounted on the first groove portion of the gripping member having a semicircular cross section in the contact surface of the fitting convex portion of the counter pressure member with the pipe. It is good also as a structure which has the width
- a plurality of the bending dies are stacked with the rotating shaft as a common shaft, and each of the plurality of bending dies is held in a plane parallel to the rotating shaft. It is good also as a structure provided with the member.
- the plurality of bending dies are composed of a plurality of members, and at least two members of the plurality of members have engagement grooves parallel to a plane orthogonal to the rotation axis, and the connection support member includes: It is good also as a structure which has a permite
- the present invention grips a bending die having a pipe receiving groove having a semicircular cross section on the outer peripheral surface and driven to rotate around a rotating shaft, and a pipe to be processed disposed in the pipe receiving groove of the bending die. And a pressure die that presses the pipe in the bending die direction.
- the bending die has a first groove portion having a semicircular cross section on the outer peripheral surface, and is formed in the first groove portion.
- a gripping member having a fitting recess extending in a circumferential direction within a plane perpendicular to the rotation axis, and a second groove having a semicircular cross section on the outer peripheral surface, and the second A fitting convex portion extending in the circumferential direction from the tip of the groove portion by a second predetermined distance, and the fitting convex portion is fitted into the fitting concave portion and the first groove portion and the second groove portion.
- a counter pressure member that forms a pipe receiving groove having a semicircular cross section in a cross section, and the fitting recess in the gripping member is A widening end surface region in which a distance between both opposing end surfaces increases in a predetermined distance region including at least a radially outer end from the rotation shaft toward the radially outer side, and the counter pressure member and the gripping member are
- the present invention provides a pipe bending apparatus in which a pipe bending die unit is configured which is connected by hinge coupling around the rotating shaft and is supported rotatably relative to the rotating shaft.
- a part of the fitting convex part is located on the front side in the traveling direction of the pipe with respect to the pipe bending start position, and the other part of the fitting convex part is It is good to set it as the structure located in the back side with respect to the advancing direction of the said pipe with respect to the bending start position of the said pipe.
- the fitting portion of the fitting convex portion to be fitted into the fitting concave portion is located on the front side in the advancing direction of the pipe with respect to the bending processing start position of the pipe, and the first of the gripping member It is preferable that a contact portion between the groove portion and the second groove portion of the counter pressure member is located on the rear side in the traveling direction of the pipe with respect to the bending start position of the pipe.
- the counter pressure member includes an annular rotation support portion rotatably supported on the rotation shaft, and is formed integrally with the rotation support portion, and the second groove portion and the curved surface portion having a semicircular cross section are formed. And a part of the rotation support part integrally joined to the body part extends radially outward, the rotation support part constitutes the fitting convex part,
- the outer peripheral surface of the rotation support portion may be a curved surface that forms a part of the semicircular pipe receiving groove.
- the fitting recess in the gripping member is a predetermined distance region including a radially inner end from the rotating shaft toward the radially outer side, and the both end surfaces are the rotating shaft. It is good to set it as the structure which has a parallel end surface area
- a plurality of the bending dies are stacked with the rotating shaft as a common shaft, and the plurality of bending dies are connected and supported on a plane parallel to the rotating shaft. It is good also as a structure provided with the member.
- the plurality of bending dies are composed of a plurality of members, and at least two members of the plurality of members have engagement grooves parallel to a plane orthogonal to the rotation axis, and the connection support member includes: It is good also as a structure which has a permite
- the first groove portion formed in the gripping member of each of the plurality of bending dies may have a different cross-sectional shape depending on the processing state of the pipe.
- the pipe bending apparatus may further include a mandrel inserted into the pipe and driven so that the tip is opposed to the pressure die within a predetermined rotation range of the bending die. Good.
- the bend die constituting the pipe has the first groove portion having a semicircular cross section on the outer peripheral surface, is formed in the first groove portion, and is orthogonal to the rotation axis.
- a gripping member having a fitting recess extending in the circumferential direction for a first predetermined distance in the plane, a second groove portion having a semicircular cross section on the outer peripheral surface, and in a circumferential direction from the tip of the second groove portion A fitting convex portion extending a second predetermined distance, the fitting convex portion is fitted into the fitting concave portion, and the first groove portion and the second groove portion are joined to form a semicircular pipe receiving groove.
- the fitting recess in the gripping member has a predetermined distance region including at least the radially outer end from the rotating shaft toward the radially outer side, and the distance between the opposing end surfaces is increased.
- Widened end surface area, and the counter pressure member and gripping member are connected by a hinge connection around the rotation axis It is because it is relatively rotatably supported around the rotational axis, can be performed appropriately bending against the pipe without worrying about the occurrence of wrinkles.
- the above-mentioned fitting recess has a widened end face region, and during the relative rotational movement of the gripping member and the counter pressure member, partial sliding occurs between them, so that a smooth operation can be ensured. And since the favorable oil retention effect can be ensured between a holding member and a counter pressure member, durability of a holding member and a counter pressure member improves.
- the widened end surface region may be formed in a tapered surface or a curved surface. Furthermore, if a plurality of pipe bending die units are prepared according to the shape of the pipe to be processed, it is only necessary to select and replace the pipe bending die unit according to the shape when bending various pipe shapes. Therefore, it is possible to provide a pipe bend die unit that can be easily changed and does not require adjustment after the change.
- a part of the fitting convex part is located on the front side in the pipe traveling direction with respect to the pipe bending start position, and the other part of the fitting convex part is the pipe bending process. It is configured to be located rearward with respect to the starting direction of the pipe in the traveling direction, or the fitting portion of the fitting convex portion fitted into the fitting concave portion is connected to the pipe bending start position.
- the contact portion between the first groove portion of the gripping member and the second groove portion of the counter pressure member is located on the rear side in the pipe traveling direction with respect to the pipe bending start position. If it is set as the structure which is carrying out, a smooth bending process can be performed, without generating a wrinkle in a pipe.
- the counter pressure member has an annular rotation support portion that is rotatably supported by the rotation shaft, the counter pressure member can be reliably supported so as to be rotatable about the rotation shaft, and is easy for the gripping member. Can be hinged to. Further, if a part of the rotation support part constitutes a fitting convex part and the outer peripheral surface of the rotation support part is a curved surface forming a part of a semicircular pipe receiving groove, the counter pressure member Can be formed into a suitable shape with a single component.
- the counter pressure member and the gripping member can be hinged by a shaft member having a central axis that passes through the fitting recess.
- the fitting recess in the gripping member is a predetermined distance region including the radially inner end from the rotating shaft toward the radially outer side, and is a plane whose both end surfaces are orthogonal to the rotating shaft. If the structure has a parallel end face area and a wide end face area extending radially outward from the rotation axis continuously to the parallel end face area, the relative distance between the gripping member and the counter pressure member is a portion between the two. Therefore, smooth operation can be ensured. And since the favorable oil retention effect can be ensured between a holding member and a counter pressure member, durability of a holding member and a counter pressure member improves.
- the widened end face region is effective when it is inclined 2 ° to 5 ° with respect to a plane orthogonal to the rotation axis.
- the contact surface of the counter pressure member with the fitting convex portion of the pipe is the center of the pipe when the pipe is mounted in the first groove portion having a semicircular cross section of the gripping member. If the structure has a width included in a region of 20 ° to 45 ° centered on the central axis in a cross-sectional view orthogonal to the axis, the pipe can be processed into a good balance between the effect of suppressing wrinkles and the appearance. it can.
- a plurality of bending dies are stacked with a rotating shaft as a common shaft, and a connection support member is provided that holds each of the plurality of bending dies on a plane parallel to the rotating shaft.
- a plurality of bending dies are firmly held in a properly connected state, so that bending can be performed on a plurality of pipes simultaneously in a stable state and appropriately according to each pipe. It can be carried out.
- the plurality of bending dies are composed of a plurality of members, and at least two members of the plurality of members have engaging grooves parallel to a plane orthogonal to the rotation axis, and the connection support member is formed in the engaging grooves.
- the plurality of bending dies are held in a state in which the protrusions are fitted and the protrusions are fitted in the engagement grooves, the plurality of bending dies are fitted by the so-called inlay structure. Since it is firmly held, it is possible to appropriately suppress bending that may occur in the fitting recess of each gripping member, and to minimize the displacement of the radially outer width of each fitting recess.
- the pipe bending apparatus of the present invention includes a pipe bending die unit configured as described above, a gripping die for holding a pipe to be processed that is disposed in a pipe receiving groove of the bending die, and a pipe bending die.
- a pressure mold that presses the pipe in the direction, and the pipe can be bent by rotating the gripping mold and the bending mold while pressing the pipe in the direction of the bending mold.
- the bending process can be appropriately performed on the pipe without concern.
- the fitting recess has a widened end surface region, and during the relative rotational movement of the gripping member and the counter pressure member, the sliding between them is partial, so that a smooth operation can be ensured.
- a part of the fitting convex part is positioned on the front side in the pipe traveling direction with respect to the pipe bending start position, and the other part of the fitting convex part is a pipe bending process. It is configured to be located rearward with respect to the starting direction of the pipe in the traveling direction, or the fitting portion of the fitting convex portion fitted into the fitting concave portion is connected to the pipe bending start position.
- the contact portion between the first groove portion of the gripping member and the second groove portion of the counter pressure member is located on the rear side in the pipe traveling direction with respect to the pipe bending start position. If it is set as the structure which is carrying out, a smooth bending process can be performed, without generating a wrinkle in a pipe.
- the counter pressure member provided in the above-described pipe bending apparatus has an annular rotation support portion that is rotatably supported by the rotation shaft, the counter pressure member can be reliably supported around the rotation shaft. And can be easily hinged to the gripping member. And a main body part formed integrally with the rotation support part and formed with a second groove part and a curved surface part having a semicircular cross section, and a part of the rotation support part integrally joined to the main body part Is extended radially outward, the rotation support portion constitutes a fitting convex portion, and the outer peripheral surface of the rotation support portion is a curved surface forming a part of a pipe receiving groove having a semicircular cross section.
- the pressure member can be formed into an appropriate shape with a single component.
- the fitting recess in the gripping member is a plane in which both end surfaces are orthogonal to the rotation axis in a predetermined distance region including the radially inner end from the rotation axis toward the radially outer side. If the structure has a parallel end surface region and a widened end surface region is formed radially outward from the rotation axis continuously to the parallel end surface region, both of the gripping member and the counter pressure member are subjected to relative rotational motion. Smooth operation can be ensured because the gap is partially slid. And since the favorable oil retention effect can be ensured between a holding member and a counter pressure member, durability of a holding member and a counter pressure member improves.
- a plurality of bending dies are stacked with a rotation axis as a common axis, and a connection support member is provided that holds each of the plurality of bending dies on a plane parallel to the rotation axis.
- a plurality of bending dies are firmly held in a properly connected state, so that bending can be performed on a plurality of pipes simultaneously in a stable state and appropriately according to each pipe. It can be carried out.
- the plurality of bending dies are composed of a plurality of members, and at least two members of the plurality of members have engagement grooves formed in parallel to a plane orthogonal to the rotation axis, and the connection support member is engaged.
- the projection has a projection that fits in the mating groove and the projections are fitted in the engagement groove and the plurality of bending dies are held, the projection is fitted in the engagement groove and a plurality of so-called inlay structures are used. Therefore, the bending that can occur in the fitting recesses of the gripping members can be appropriately suppressed, and the displacement of the radially outer width of each fitting recess can be minimized. Furthermore, if the first groove formed on each gripping member of the plurality of bending dies has a different cross-sectional shape depending on the processing state of the pipe, the gripping target portion is changed depending on the processing state. A plurality of different pipes can be bent simultaneously.
- FIG. 20 is a cross-sectional view taken along line AA of FIG. FIG.
- FIG. 20 is a sectional view taken along line BB in FIG. It is CC sectional view taken on the line of FIG. It is a disassembled perspective view of the counter pressure member provided for embodiment of this invention. It is a perspective view of the pipe bending die unit which concerns on another embodiment of this invention.
- FIG. 25 is an exploded perspective view of the pipe bend die unit according to the embodiment shown in FIG. 24. It is a perspective view which shows the pipe bending apparatus which concerns on one Embodiment of this invention. It is a perspective view which shows the pipe by which the bending process was performed using the pipe bending die unit which concerns on embodiment of this invention. It is sectional drawing which shows the bending process state of the pipe in the pipe bending apparatus using the pipe bending die unit which concerns on embodiment of this invention.
- FIG. 1 shows a pipe bending mold unit according to an embodiment of the present invention, and a pipe bending apparatus according to an embodiment including a gripping mold 200 and a pressure mold 300 in addition to the pipe bending mold unit.
- a bending die 100 having a pipe receiving groove (configured by first and second groove portions 11 and 21 described later) having a semicircular cross section on the outer peripheral surface and driven to rotate about the rotation axis (A). .
- the pipe P to be processed is gripped between the bending mold 100 and the gripping mold 200 and is driven forward while being pressed in the direction of the bending mold 100 by the pressure mold 300, and the compression load and shaft The pipe P is bent by the pressing load.
- the bending die 100 of the present embodiment includes a gripping member 10 and a counter pressure member 20, and as shown in FIGS. 1 and 2, the gripping member 10 is formed with a first groove 11 having a semicircular cross section. At the same time, a fitting recess 12 having a predetermined width is formed in the first groove 11 so as to extend a predetermined distance in the circumferential direction within a plane orthogonal to the rotation axis (A).
- a base 13 is formed integrally with the gripping member 10, and a shaft member 60 constituting the rotation shaft (A) is fixed to the base 13 and a holding member 70 is fixed to the gripping member 10. Further, a knock pin 80 is fixed at a predetermined position of the base portion 13, which will be described later.
- the gripping member 10 has an annular recess 10b that forms a first groove 11 having a semicircular cross section, and extends in the circumferential direction within a plane orthogonal to the rotation axis (A).
- a fitting recess 12 having a predetermined width is provided.
- the fitting recess 12 is disposed at the bottom center of the annular recess 10b.
- the first groove 11 having a semicircular cross section includes a part of the fitting recess 12 and is continuous with the annular recess 10b.
- the gripping member 10 includes a gripping portion 10a that grips the pipe P (a joint surface with the gripping mold 200 is a flat surface) and an annular recess 10b that is formed continuously therewith, and the gripping portion 10a and the annular recess 10b.
- a base portion 13 is integrally formed.
- the first groove portion 11 has a continuous semicircular cross section of a semicircular groove portion 11a formed in the grip portion 10a and a semicircular groove portion 11b formed in the annular recess 10b.
- a plurality of holding strips are provided in parallel in the circumferential direction of the groove portion 11a, as in the inner peripheral surface of the holding die 200.
- the gripping part 10a is formed integrally with the gripping member 10, but the gripping part 10a is a separate body (indicated by 10y in FIG. 5 etc.) and the main body 10 (in FIG. 10x)).
- a main body 10x is constituted by an upper mold 40 and a lower mold 50 divided by a plane orthogonal to the rotation axis (A), and a separate gripping portion 10y is joined thereto.
- the gripping member 10 can be configured. That is, the shaft member 60 is disposed so as to pass through the center hole 42 of the upper mold 40, the rotation support portion 23 of the counter pressure member 20, and the center hole 52 of the lower mold 50, and the upper portion of the shaft member 60 is the holding member 70.
- the holding member 70 After being inserted through the central hole 71, the holding member 70 is fixed to the upper mold 40.
- a screw (not shown) is inserted into the holding portion 10y from the mounting holes 14 and 15, and screwed into the screw holes 41 and 51 of the upper die 40 and the lower die 50, respectively, and the main body 10x (the upper die 40 and the lower die 50). ).
- the gripping member 10 is configured by the main body 10 x and the gripping part 10 y configured by the upper mold 40 and the lower mold 50, the notch of the gripping part 10 y, and the upper mold 40 and the lower mold 50.
- the fitting recess 12 is formed by the gap between the fitting recess 12 and the fitting protrusion 22 of the counter pressure member 20 is interposed in the fitting recess 12 to constitute the bending die 100.
- the gripping member 10 includes the body 10x and the gripping portion 10y unless otherwise specified.
- the counter pressure member 20 is formed with a second groove portion 21 having a semicircular cross section on the outer peripheral surface, and in the circumferential direction from the tip portion of the second groove portion 21.
- a fitting convex portion 22 is formed so as to extend a predetermined distance to the first groove portion 11 of the gripping member 10 and the counter pressure member when the fitting convex portion 22 is fitted into the fitting concave portion 12.
- a pipe receiving groove having a semicircular cross section is formed by the 20 second groove portions 21.
- the counter pressure member 20 is rotatably supported by a curved surface portion (counter pressure portion) 20 a disposed so as to be in contact with the annular recess 10 b and a rotation shaft (A).
- the rotation support portion 23 is integrally formed, and the fitting convex portion 22 is constituted by a part of the rotation support portion 23. Therefore, the outer peripheral surface of the rotation support portion 23 is formed in a curved surface, and is configured to form a pipe receiving groove having a semicircular cross section together with the first groove portion 11 of the gripping member 10.
- the counter pressure member 20 is formed with a second groove portion 21 having a semicircular cross section, and the end surface shape of the second groove portion 21 contacting the first groove portion 11 of the gripping member 10 corresponds to FIG. As shown by the contact portion (R), it is curved in a front view.
- the outer peripheral side surface 22a (namely, outer peripheral side surface of the rotation support part 23) of the fitting convex part 22 is formed in the curved surface as shown in FIG.7 and FIG.8, and the fitting convex part 22 is the holding member 10.
- a part of the semicircular cross section of the first groove portion 11 of the gripping member 10 is formed when fitted into the fitting recess 12, and a pipe receiving groove having a semicircular cross section is formed by both.
- the rotation support part 23 of this embodiment is formed in cyclic
- the gripping member 10 and the counter pressure member 20 configured as described above are connected by a hinge coupling around the rotation axis (A), and can be relatively rotated around the shaft member 60 (rotation axis (A)). It is supported by.
- the gripping member 10 is supported so as to be rotationally driven with respect to the counter pressure member 20 fixed at a predetermined position of a support device (not shown).
- the gripping member 10 and the counter pressure member 20 are fitted on the basis of a bending start position (indicated by a one-dot chain line S in the vertical direction in FIG. 2) when bending the pipe P.
- the fitting portion with the fitting convex portion 22 not included in the plane perpendicular to the rotation axis (A) in the concave portion 12 (two planes including (H) shown in FIG. 2 and parallel to the plane perpendicular to the paper surface of FIG. 2).
- (F) is located on the front side in the traveling direction of the pipe P (the right side of S in FIG. 2), and the first groove portion 11 of the gripping member 10 and the second groove portion 21 of the counter pressure member 20 are in the rotational direction. It connects so that a contact part (R) may be located in the back side (left side of S in FIG. 2) with respect to the advancing direction of the pipe P. As shown in FIG.
- the fitting portion (F) in the rotational direction of the fitting convex portion 22 fitted into the fitting concave portion 12 is positioned on the front side in the traveling direction of the pipe P with respect to the bending start position of the pipe P.
- the rotational contact portion (R) between the first groove portion 11 of the gripping member 10 and the second groove portion 21 of the counter pressure member 20 is rearward in the direction of travel of the pipe P with respect to the bending start position of the pipe P. Located on the side.
- the fitting convex part 22 of the counter pressure member 20 in the present embodiment is a first semi-circular cross section of the gripping member 10 as shown in FIG. Included in a region ( ⁇ ) of 20 ° to 45 ° centered on the central axis (PC) in a cross-sectional view perpendicular to the central axis (indicated by PC in FIG. 7) when the pipe P is mounted in the groove 11 Width (t).
- the width (t) is a dimension included in the region ( ⁇ ) in the contact surface 22a with the pipe P, and is rotated from the contact surface 22a.
- the cross-sectional width of the fitting convex portion 22 toward the axis (A) may be set to gradually decrease or may be set to gradually increase, and the fitting concave portion 12 having a cross-sectional shape corresponding to this may be formed. .
- the fitting recess 12 has a predetermined distance including the radially inner end portion (see (f) in FIG. )) In the region where the opposite end faces are formed on a plane perpendicular to the rotation axis A (for example, a plane parallel to a plane including (H) similar to FIG. 2). And a widened end surface formed so that the interval between the opposite end surfaces increases radially outward from the rotation axis (A) continuously to the parallel end surface region (12fs). It has a region (represented by 12es on behalf of both end faces). The widened end surface region (12es) shown in FIG.
- the widened end surface region (12es) of the tapered surface shown in FIG. 8 can be formed by a single cutting process, but the widened end surface region of the curved surface shown in FIG. Since 12cs) requires sequential cutting, a widened end surface region by a tapered surface is desirable. Or although illustration is abbreviate
- the counter pressure member 20 configured as described above is assembled as shown in FIG. 5, and the rotating shaft (A) is mounted with the fitting convex portion 22 fitted in the fitting concave portion 12 of the gripping member 10.
- the shaft member 60 to be configured is inserted into the rotation support portion 23 and fixed to the base portion 13 and is fixed to the holding member 70, the bending die 100 shown in FIG. Further, the knock pin 80 is fixed at a predetermined position of the base portion 13 of the gripping member 10, and the position where the counter pressure member 20 contacts the knock pin 80 is set to be the initial relative position of the grip member 10 and the counter pressure member 20.
- the gripping mold 200 and the pressure mold 300 are arranged as shown in FIG. 1 and are arranged so as to be closely spaced from the bending mold 100, respectively.
- the pipe bending die unit is constituted by the bending die 100 in which the gripping member 10 and the counter pressure member 20 are arranged at the initial relative position, the pipe to be processed is formed. If a plurality of pipe bending die units are prepared according to the shape of P, when bending various pipe shapes, it is only necessary to select and replace the pipe bending die unit according to the shape. Replacement can be performed easily. In particular, since the initial relative positions of the gripping member 10 and the counter pressure member 20 can be set in advance by the knock pin 80, adjustment after changing the setting is unnecessary, and changing the setting can be easily performed without requiring skill. Can do. Furthermore, if the pipe bending die unit includes the gripping die 200 and the pressure die 300 to form a unit, a pipe bending tool assembly that can be easily changed and adjusted can be provided.
- the bending target portion of the body portion of the pipe P is arranged at the bending start position (S in FIG. 2) of the bending die 100.
- the same metal core also called a mandrel, indicated by M in FIGS. 1 and 6) is inserted into the pipe P as before.
- the core metal M has ball cores M1 and M2 supported in a tiltable manner at the tip end portions thereof as shown in FIG. 6 (however, hatching is omitted in view of visibility).
- Gold M1 and M2 are inserted into the pipe P and driven so as to be interposed between the bending die 100, the gripping die 200, and the pressure die 300 within a predetermined rotation range of the bending die 100.
- the gripping mold 200 and the pressure mold 300 are driven in the direction of the bending mold 100, and the tip of the pipe P is gripped between the gripping member 10 of the bending mold 100 and the gripping mold 200, and the body portion of the pipe P Is pressed between the counter pressure member 20 of the bending die 100 and the pressure die 300.
- the pipe P is driven forward while the body portion of the pipe P is pressed against the counter pressure member 20 by the pressure die 300 in a state where the tip portion of the pipe P is held between the holding member 10 and the holding die 200.
- the gripping mold 200 and the gripping member 10 are driven to rotate about the rotation axis (A)
- the pipe P is sequentially wound around the outer peripheral side surface of the rotation support portion 23 (the outer peripheral side surface 22a of the fitting convex portion 22).
- the pipe P is bent as shown in FIG. 6 and bent as shown in FIG.
- the bending die 100 provided for the pipe bending die unit of the present embodiment includes the gripping member 10 and the counter pressure member 20, which are connected by a hinge connection around the rotation axis (A). Since the pipe P is bent, the counter pressure member 20 is pressed against the pressure die 300 (via the pipe P) because the pipe P is bent. The gripping member 10 can rotate relative to the counter pressure member 20 around the rotation axis (A). Therefore, the gripping member 10 rotates in the circumferential direction away from the counter pressure member 20 from the bending start position (S in FIG. 2) with respect to the pipe P.
- the fitting portion (F in FIG. 2) with the fitting convex portion 22 not included in the plane orthogonal to the rotation axis (A) in the fitting concave portion 12 is advancing of the pipe P. 2 in the rotational direction between the first groove portion 11 of the gripping member 10 and the second groove portion 21 of the counter pressure member 20 with respect to the traveling direction of the pipe P.
- the gripping member 10 and the counter pressure member 20 are coupled so as to be located on the rear side, and a step that may occur between the grip member 10 and the counter pressure member 20 is suppressed to be small. For this reason, even if a larger axial pushing load and compressive load are applied to the pipe P than before, the plastic deformation accompanying the bending process can be appropriately controlled. This point will be described in detail later with reference to FIGS.
- the pipe P that has been bent using the pipe bend die unit of the present embodiment corresponds to the fitting portion of the fitting concave portion 12 and the fitting convex portion 22 as shown in FIG.
- a slightly thick portion bump-shaped portion
- a portion that continues to this is a smooth curved surface.
- the thickness gradually changes at a portion indicated by a thin line in FIG. 27, and the flowing meat is fitted into the fitting portion (F in FIG. 2) to form the thick portion TP1
- the thick portions TP2 and TP3 are formed along the contact portion (R in FIG. 2)
- the portion indicated by the thin line in FIG. 27 is formed in a smooth curved surface and does not correspond to a so-called wrinkle.
- the bent pipe in which these thick portions TP1, TP2, and TP3 are formed serves as proof that the bending process has been performed using the pipe bending die unit of the present embodiment, and supports the processing quality.
- the contact surface 22a is set to the thickness indicated by the width (t) in FIG.
- the pressing force applied at the time of processing is large when the width (t) of the contact surface 22a is within the range of the region ( ⁇ ), and the pressing force decreases in a square manner as it deviates from the region ( ⁇ ). It was confirmed. As a result, the pipe P having a good balance between the effect of suppressing wrinkles and the appearance can be processed.
- the width (t) of the contact surface 22a of the fitting convex portion 22 is set to a region smaller than 20 ° centered on the central axis (PC) of the pipe P, FIG.
- the thick part TP1 on the bending start side is small and the thick part TP3 on the bending end side is large, and the appearance is good, but there is difficulty in increasing the wall thickness, It becomes difficult to suppress.
- the width (t) of the contact surface 22a of the fitting convex portion 22 is set to an area larger than 45 ° centering on the central axis (PC) of the pipe P, the shape shown in FIG.
- the thick part TP1 on the bending start side is large and the thick part TP3 on the bending end side is small, so that the wrinkle suppressing effect is good, but the product has a difficult appearance.
- smooth bending can be performed (without occurrence of wrinkles) by the pipe bending apparatus provided with the pipe bending die unit of the present embodiment.
- the pipe bending apparatus provided with the pipe bending die unit of the present embodiment.
- the gripping member 10 may be fixed and the counter pressure member 20 may be driven to rotate about the rotation axis (A).
- the pipe bending die unit includes a rotating shaft (a plurality of bending dies 100 a, 100 b, and 100 c, each including the gripping member 10 and the counter pressure member 20, which are stacked). It can also be set as the structure supported rotatably about A).
- Each of the gripping members 10 and the counter pressure member 20 is connected by a hinge connection centering on the rotation axis (A), and the bending dies 100a, 100b, and 100c are all arranged as shown in FIG.
- the main body 10x of the gripping member constituted by the mold 40 and the lower mold 50 is in a form in which three stages are stacked.
- the four members B1 to B4 constitute the three gripping member main bodies 10xa, 10xb, and 10xc
- the main body 10xa is the upper die 401 (members).
- B1) and lower mold 501 part of member B2
- main body 10xb is composed of upper mold 402 (part of member B2) and lower mold 502 (part of member B3), and main body 10xc.
- Bushings 61 to 63 are interposed between the bottoms of the fitting recesses 12xa, 12xb, and 12xc and the shaft member 60, respectively.
- gripping tools 10ya, 10yb, and 10yc are joined to the main bodies 10xa, 10xb, and 10xc, respectively, and each gripping member is configured.
- the fitting recess 12xc is enlarged radially from the rotation axis (A) as shown in FIG.
- the opposite end faces are parallel to each other and formed in a plane perpendicular to the rotation axis A (for example, a plane parallel to the plane including (H) shown in FIG. 2).
- a widened end surface having an end surface region (12fs) and formed such that a distance between opposite end surfaces increases continuously from the rotation axis (A) in the radial direction continuously to the parallel end surface region (12fs). It has a region (12es).
- the taper surface or curved surface is formed from the radially inner end on the rotating shaft (A) side to the radially outer end without providing the parallel end surface region (12fs). It may be set so that only the widened end surface region (12es, 12cs) is obtained.
- each gripping member 10 including a gripping member composed of a plurality of members shown in FIG. 10
- each counter pressure member 20 23 (including a counter pressure member composed of a plurality of members shown in FIG. 23, etc.)
- the sliding between each fitting concave portion 12 and each fitting convex portion 22 results in partial sliding. Operation can be ensured.
- a good oil retaining effect can be ensured between each fitting recess 12 and each fitting projection 22, and therefore the durability of each gripping member 10 and each counter pressure member 20 is improved.
- FIG. 13 shows a gripping tool 10ya, 10yb and 10yc, a connection support member 91 for these gripping tools, three counter pressure members 20, and a connection support member 92 for these counter pressure members in addition to the configuration shown in FIG.
- concave portions 10c1, 10c2 and 10c3 having shapes corresponding to the processing state of the pipe P which is the gripping object (that is, the shape of the gripping target part) are formed.
- the end portions of the annular recesses 10b1, 10b2, and 10b3 are configured.
- FIG. 14 shows, instead of the gripping member main bodies 10xa, 10xb and 10xc shown in FIGS. 11 and 13, an annular recess 10b1 having a shape corresponding to the bending radius of the pipe P to be gripped and / or the outer diameter of the pipe P.
- the gripping members 110a, 110b, and 110c formed with 10b2 and 10b3 are used, and fitting protrusions (22 in FIG. 4) having shapes (different outer diameters) according to the bending radius of the pipe P and / or the outer diameter of the pipe P are used.
- the counter pressure members 120a, 120b, and 120c are formed.
- the connection support members 91 and 92 are the same as those in FIG.
- FIG. 15 shows three gripping members 110a, 110b and 110c formed with recesses 10c1, 10c2 and 10c3 (similar to FIG. 13 above) having shapes corresponding to the processing state of the pipe P to be gripped.
- Three counter pressure members 20 to be fitted are joined to the connection support member 92.
- gripping members 110a, 110b, and 110c formed with annular recesses (similar to FIG. 13) having a shape corresponding to the processing state of the pipe P to be gripped, and a connection support member 91 are integrally formed. ing.
- the three counter pressure members 20 that fit into the gripping members 110 a, 110 b, and 110 c are joined to the connection support member 92.
- the bending dies 100a, 100b, and 100c are stacked, and the main body 10xa, 10xb of the three gripping members by the four members B1 to B4 (and the shaft member 60).
- the main body 10xa is composed of an upper mold 401 and a lower mold 501
- the main body 10xb is composed of an upper mold 402 and a lower mold 502
- the main body 10xc is composed of an upper mold 403 and a lower mold 503.
- annular recesses 10b1, 10b2, and 10b3 are formed respectively.
- the gripping members 10ya, 10yb and 10yc are joined to the body 10xa, 10xb and 10xc of the gripping member.
- an engagement groove Bg orthogonal to the rotation axis (A) is formed in the cylindrical portion between the lower mold 501 and the upper mold 402 in the member B2, and the lower mold in the member B3.
- Engaging grooves Cg perpendicular to the rotation axis (A) are also formed in the cylindrical portion between 502 and the upper mold 403, and protrusions 91 b and 91 c that fit into these grooves are formed in the connection support member 91.
- each of the members B1 to B4 is coupled to the connection support member 91 by a bolt or the like on the side opposite to the bending start position of each gripping member, and the protrusions 91b and 91c are respectively formed in the engagement grooves Bg and Cg. They are fitted and firmly held by a so-called inlay structure. That is, the members B2 and B3 constituting the bending mold each have engagement grooves Bg and Cg formed in parallel to a plane orthogonal to the rotation axis (A), and the connection support member 91 includes the engagement grooves Bg, Protrusions 91b and 91c that fit into each of Cg are provided, and these hold the holding member main bodies 10xa, 10xb, and 10xc firmly.
- each counter pressure member 20 is joined to the connection support member 92 by a bolt or the like.
- the connection support members 91 and 92 are preferably formed in an L-shaped cross section or a Z-shaped cross section, and the section modulus is increased to improve rigidity.
- Each counter pressure member 20 (hereinafter, xa, xb, and xc are omitted) is divided and formed as shown in FIGS. 20, 22, and 23, and the members are joined to each other by bolts or the like. That is, each counter pressure member 20 has a rotation support portion 23 and a main body portion 24, and the rotation support portion 23 is joined to the main body portion 24, and the rotation support portion 23 has a large size via a pipe P to be processed. Wear is inevitable because a load is applied, and it is necessary to replace it after a long period of use.
- the counter pressure member 20 configured to be joined to the connection support member 26 is further divided, and mainly the rotation support portion 23 and the joint portion 25.
- the first pressure member 20 is divided into a second member made up of a part of the rotation support portion 23 and the main body portion 24, and these are joined by, for example, bolts to constitute each counter pressure member 20.
- the rotation support portion 23 of each counter pressure member 20 is worn, it is only necessary to replace the second member including a part thereof. From the viewpoint of use, it is possible to provide an inexpensive counter pressure member 20 (and thus an inexpensive bending die 100).
- the rotation support portion 23 is formed with a rib 23a in which at least a part in the circumferential direction of the rotation support portion 23 formed integrally with the main body portion 24 extends radially outward.
- the rotation support portion 23 is configured to relieve stress concentration at the skirt portion at the boundary with the curved surface portion 20a.
- the rotating shaft (A) bends with respect to the bending dies 100a, 100b, and 100c when the pipe P is bent.
- a force in a direction may be applied.
- each of the members B1 to B4 is coupled to the connection support member 91 by a bolt or the like, and is firmly formed by a so-called inlay structure. Therefore, the bending that may occur in the fitting recess 12 of each gripping member 10 can be suppressed, and the displacement of the width on the radially outer side of each fitting recess 12 can be minimized.
- each gripping member 10 is supported by a common connection support member 91, and each counter pressure member 20 is supported by a common connection support member 92. Therefore, the initial relative position of each gripping member 10 and each counter pressure member 20 can be easily set by a single knock pin 80, and adjustment after changing the stage is unnecessary.
- bending dies 100a, 100b, and 100c are laminated, and six members B1 to B6 (and shaft member 60) constitute three gripping member bodies 10xa, 10xb, and 10xc.
- the main body 10xa is composed of an upper mold 401 and a lower mold 501
- the main body 10xb is composed of an upper mold 402 and a lower mold 502
- the main body 10xc is composed of an upper mold 403 and a lower mold 503, respectively.
- Recesses 10b1, 10b2, and 10b3 are formed. And as shown in FIG.
- the holding tools 91ya, 10yb, and 10yc are joined to the connection support member 91 adjacent to the main bodies 10xa, 10xb, and 10xc.
- the connection support member 92 three counter pressure members 120a, 120b and 120c are supported by the connection support member 92, and each counter pressure member is configured as shown in FIG.
- the pipe bending apparatus 1 to which the pipe bending die unit of each of the above embodiments is mounted is configured as shown in FIG. 26, for example, and is provided with a pipe chuck CH that holds the pipe P to be processed, and advances the pipe P.
- a carriage CR that drives and applies a shaft pushing load is provided.
- the gripping mold 200 is disposed on the rotary table 2 and is configured to be driven to rotate about the shaft member 60 (rotating shaft (A)). Then, for example, a pipe bending die unit (indicated by DU) shown in FIGS.
- connection support member 91 and the connection support member 92 are driven to rotate around the shaft member 60, so that the three gripping members 10 and the pair are connected.
- the movement of the pressure member 20 is controlled.
- the connection support member 92 is connected to the driving device DR via the link 93, and the three counter pressure members 20 are configured to move simultaneously, but the three gripping members 10 and The counter pressure member 20 may be configured to be driven and controlled separately.
- the bending die 100 shown in the above-described embodiment in particular, the counter pressure member 20 connected to the gripping member 10 by the hinge connection functions, and is configured to sufficiently resist the large load of the pressure die 300.
- an axial push load (indicated by FL) and a compressive load (indicated by PL) are applied to the pipe P.
- the fitting portion (F) with the fitting convex portion 22 not included in the plane orthogonal to the rotation axis (A) in the fitting concave portion 12 is positioned on the front side in the traveling direction of the pipe P.
- the contact portion (R) in the rotational direction between the first groove portion 11 of the gripping member 10 and the second groove portion 21 of the counter pressure member 20 is positioned on the rear side with respect to the traveling direction of the pipe P. Since the gripping member 10 and the counter pressure member 20 are connected to each other, it is possible to ensure a pressure resistance that can sufficiently resist a large load of the pressure die 300. Further, when the core metal M (ball core metal M1 and M2) is inserted into the pipe P, the compressive load (PL) on the pipe P can be further increased, so that the bending radius of the pipe P is increased. Can be minimal.
- an axial load (FL) is applied to the pipe P, and the material is fed (increased thickness).
- a frictional force (indicated by a left arrow FR in FIG. 29) is generated in the bent inner portion of the pipe P against the axial load (FL) due to the compression load (PL).
- the thickening is promoted by this frictional force (FR).
- a shaft pushing load (FL) is applied in a state where the core metal M is inserted into the pipe P, the pipe P is driven forward while being sandwiched between the core metal M and the counter pressure member 20 (see FIG. 29 is moved in the right direction), and the ironing action by both members is also added, and the increase in thickness is further promoted.
- a wedge-shaped wiper W is arranged to bite into the pipe P and the bending die D as shown in FIG.
- the tip of the wiper W has an extremely thin shape, so it must be fragile.
- the tip of the wiper W is deformed or damaged, and a gap between the pipe P and the pipe P becomes large, and wrinkles are generated.
- the bending radius of the pipe P that can be bent is limited, and a pipe having a bending radius with the r / d ratio of about 2 is manufactured. Was at best.
Abstract
Description
10b,10b1,10b2,10b3 環状凹部
10x,10xa,10xb,10xc 本体
10y,10ya,10yb,10yc 把持具
11,11a,11b 第1の溝部
12,12xa,12xb,12xc 嵌合凹部
13 基部
20,120a,120b,120c 対圧部材
21 第2の溝部
22 嵌合凸部
23 回転支持部
26 支持部材
30 基台
40,401,402,403 上型
50,501,502,503 下型
60 軸部材
70 保持部材
80 ノックピン
91,92 連結支持部材
100,100a,100b,100c 曲げ型
200 把持型
300 圧力型
A 回転軸
P パイプ
M 芯金
Claims (20)
- 外周面に断面半円状のパイプ受溝を有し回転軸を中心に回転駆動される曲げ型を備え、
該曲げ型が、
外周面に断面半円状の第1の溝部を有すると共に、該第1の溝部に形成され、前記回転軸に対し直交する平面内で周方向に第1の所定距離延在する嵌合凹部を有する把持部材と、
外周面に断面半円状の第2の溝部を有すると共に、該第2の溝部の先端部から周方向に第2の所定距離延出する嵌合凸部を有し、該嵌合凸部が前記嵌合凹部に嵌合し前記第1の溝部及び前記第2の溝部を結合して前記断面半円状のパイプ受溝を形成する対圧部材とを具備し、
前記把持部材における前記嵌合凹部は、前記回転軸から径方向外側に向かって、少なくとも径方向外側端部を含む所定距離領域で、対向する両端面間の間隔が拡大する拡幅端面領域を有し、
前記対圧部材と前記把持部材が前記回転軸を中心とする蝶番結合によって連結され、前記回転軸を中心に相対的に回転可能に支持されている
パイプ曲げ型ユニット。 - 前記嵌合凸部の一部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の前方側に位置し、前記嵌合凸部の他の部分が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向に対して後方側に位置している
請求項1記載のパイプ曲げ型ユニット。 - 前記嵌合凹部に嵌合される前記嵌合凸部の嵌合部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の前方側に位置し、前記把持部材の前記第1の溝部と前記対圧部材の前記第2の溝部との当接部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の後方側に位置している
請求項1記載のパイプ曲げ型ユニット。 - 前記対圧部材は、前記回転軸に回転可能に軸支される環状の回転支持部を有し、
該回転支持部の一部が前記嵌合凸部を構成し、当該回転支持部の外周面が、前記断面半円状のパイプ受溝の一部を形成する曲面である
請求項1記載のパイプ曲げ型ユニット。 - 前記対圧部材と前記把持部材は、前記嵌合凹部を挿通する中心軸を有する軸部材によって蝶番結合されている
請求項1記載のパイプ曲げ型ユニット。 - 前記把持部材における前記嵌合凹部は、前記回転軸から径方向外側に向かって、径方向内側端部を含む所定距離領域で、前記両端面が前記回転軸に直交する平面である平行端面領域を有し、該平行端面領域に連続して前記回転軸から径方向外側に向かって前記拡幅端面領域を有する
請求項1記載のパイプ曲げ型ユニット。 - 前記拡幅端面領域は、前記回転軸に直交する平面に対し2°乃至5°傾斜している
請求項6記載のパイプ曲げ型ユニット。 - 前記対圧部材における前記嵌合凸部の前記パイプとの当接面は、前記把持部材の前記断面半円状の第1の溝部に前記パイプが装着されたときの前記パイプの中心軸に直交する断面視で、該中心軸を中心とする20°乃至45°の領域に包含される幅を有する
請求項1記載のパイプ曲げ型ユニット。 - 前記曲げ型が、前記回転軸を共通の軸として複数個積層されると共に、複数の前記曲げ型の各々を前記回転軸に平行な面で保持する連結支持部材を備えた
請求項1記載のパイプ曲げ型ユニット。 - 前記複数の曲げ型が複数の部材で構成され、該複数の部材のうち少なくとも二つの部材が、前記回転軸に直交する平面に平行な係合溝を有し、前記連結支持部材は、前記係合溝に嵌合する突起を有し、該突起が前記係合溝に嵌合した状態で前記複数の曲げ型を保持する
請求項9記載のパイプ曲げ型ユニット。 - 前記複数の曲げ型の各々の前記把持部材に形成される前記第1の溝部が、夫々前記パイプの加工状態に応じて相互に異なる断面形状を有する
請求項9記載のパイプ曲げ型ユニット。 - 外周面に断面半円状の溝を有し回転軸を中心に回転駆動される曲げ型と、
該曲げ型の溝との間に加工対象のパイプを把持する把持型と、前記パイプを前記曲げ型方向に押圧する圧力型とを備え、
前記曲げ型が、
外周面に断面半円状の第1の溝部を有すると共に、該第1の溝部に形成され、前記回転軸に対し直交する平面内で周方向に第1の所定距離延在する嵌合凹部を有する把持部材と、
外周面に断面半円状の第2の溝部を有すると共に、該第2の溝部の先端部から周方向に第2の所定距離延出する嵌合凸部を有し、該嵌合凸部が前記嵌合凹部に嵌合し前記第1の溝部及び前記第2の溝部を結合して前記断面半円状のパイプ受溝を形成する対圧部材とを具備し、
前記把持部材における前記嵌合凹部は、前記回転軸から径方向外側に向かって、少なくとも径方向外側端部を含む所定距離領域で、対向する両端面間の間隔が拡大する拡幅端面領域を有し、
前記対圧部材と前記把持部材が前記回転軸を中心とする蝶番結合によって連結され、前記回転軸を中心に相対的に回転可能に支持されてパイプ曲げ型ユニットが構成されている
パイプ曲げ加工装置。 - 前記嵌合凸部の一部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の前方側に位置し、前記嵌合凸部の他の部分が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向に対して後方側に位置している
請求項12記載のパイプ曲げ加工装置。 - 前記嵌合凹部に嵌合される前記嵌合凸部の嵌合部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の前方側に位置し、前記把持部材の前記第1の溝部と前記対圧部材の前記第2の溝部との当接部が、前記パイプの曲げ加工開始位置に対し前記パイプの進行方向の後方側に位置している
請求項12記載のパイプ曲げ加工装置。 - 前記対圧部材は、
前記回転軸に回転可能に軸支される環状の回転支持部と、
該回転支持部に一体的に形成され、前記断面半円状の第2の溝部及び前記曲面部が形成された本体部とを有し、該本体部に一体的に接合される前記回転支持部の一部が径方向外側に延出し、
前記回転支持部が前記嵌合凸部を構成し、前記回転支持部の外周面が前記断面半円状のパイプ受溝の一部を形成する曲面である
請求項12記載のパイプ曲げ加工装置。 - 前記把持部材における前記嵌合凹部は、前記回転軸から径方向外側に向かって、径方向内側端部を含む所定距離領域で、前記両端面が前記回転軸に直交する平面である平行端面領域を有し、該平行端面領域に連続して前記回転軸から径方向外側に向かって前記拡幅端面領域を有する
請求項12記載のパイプ曲げ加工装置。 - 前記曲げ型が、前記回転軸を共通の軸として複数個積層されると共に、複数の前記曲げ型の各々を前記回転軸に平行な面で保持する連結支持部材を備えた
請求項12記載のパイプ曲げ加工装置。 - 前記複数の曲げ型が複数の部材で構成され、該複数の部材のうち少なくとも二つの部材が、前記回転軸に直交する平面に平行な係合溝を有し、
前記連結支持部材は、前記係合溝に嵌合する突起を有し、該突起が前記係合溝に嵌合した状態で前記複数の曲げ型を保持する
請求項17記載のパイプ曲げ加工装置。 - 前記複数の曲げ型の各々の前記把持部材に形成される前記第1の溝部が、夫々前記パイプの加工状態に応じて相互に異なる断面形状を有する
請求項17記載のパイプ曲げ加工装置。 - 前記パイプ内に先端部が挿入され、前記曲げ型の所定の回転範囲で前記先端部が前記圧力型に対向するように駆動される芯金を備えた
請求項12記載のパイプ曲げ加工装置。
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US15/033,460 US9707610B2 (en) | 2014-12-26 | 2015-11-13 | Pipe bend die unit, and pipe bending apparatus having the unit |
CN201580071143.4A CN107107144B (zh) | 2014-12-26 | 2015-11-13 | 管弯曲模具单元和具有该单元的管弯曲装置 |
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CN108043923A (zh) * | 2017-12-04 | 2018-05-18 | 贵州风雷航空军械有限责任公司 | 一种气密性铝管多处弯曲方法 |
CN107855385A (zh) * | 2017-12-14 | 2018-03-30 | 中山精达特克机械有限公司 | 一种u形管折弯机构 |
CN108856389A (zh) * | 2018-07-17 | 2018-11-23 | 重庆祥越管道配件制造有限公司 | 管件弯折防摩擦设备 |
JP7054057B2 (ja) * | 2018-07-26 | 2022-04-13 | 株式会社ノーリツ | ベンドパイプおよびその製造方法 |
IT201800010409A1 (it) * | 2018-11-16 | 2020-05-16 | Cml Int S P A | Macchina per curvare un pezzo allungato senza formazione di grinze |
CN112792179A (zh) * | 2020-12-15 | 2021-05-14 | 珠海格力智能装备有限公司 | 折弯机构 |
JP7213500B2 (ja) * | 2021-03-19 | 2023-01-27 | 極東工業株式会社 | 固定治具 |
CN113231506B (zh) * | 2021-07-09 | 2021-09-03 | 江苏优霸五金工具有限公司 | 一种六角扳手制造折弯加工设备 |
CN113664081B (zh) * | 2021-08-27 | 2022-08-23 | 中国航发沈阳黎明航空发动机有限责任公司 | 一种基于数控绕弯成形利用多层型槽模具进行弯管的方法 |
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CN107107144B (zh) | 2019-08-30 |
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