CN108723239B

CN108723239B - Molding machine, method for molding metal material, and method for manufacturing stop claw member

Info

Publication number: CN108723239B
Application number: CN201710253645.XA
Authority: CN
Inventors: 上乐孝夫
Original assignee: YKK Corp
Current assignee: YKK Corp
Priority date: 2017-04-18
Filing date: 2017-04-18
Publication date: 2020-07-10
Anticipated expiration: 2037-04-18
Also published as: TW201838737A; CN108723239A; TWI649135B

Abstract

The present invention relates to a forming machine, a forming method of a metal material, and a manufacturing method of a stop claw member, which are used for solving the following problems: the forming accuracy of at least a part of the metal sheet manufactured by the forming machine cannot be sufficiently ensured. The molding machine (92) includes: a mandrel (110) having a metal material (80) disposed on the outer peripheral surface thereof; a cutter (140) that operates to cut the metal material (80); and at least one punch (133) that is provided so as to sandwich the metal material (80) with the cutter (140), and that operates in such a manner that: one or more bent portions (86) are formed in a metal material (80) cut by a cutter (140) and positioned on a mandrel (110) in cooperation with the outer peripheral surface of the mandrel (110).

Description

Molding machine, method for molding metal material, and method for manufacturing stop claw member

Technical Field

The present invention relates to a molding machine, a method of molding a metal material, and a method of manufacturing a stopper claw member.

Background

Patent document 1 discloses a molding machine for a stop pawl member of a slider for a slide fastener. In patent document 1, a first punch is provided with a blade for cutting a material, and the material is bent by a cooperation of the first punch and a mandrel.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2015/128996

Disclosure of Invention

In the case of patent document 1, there is a possibility that the forming accuracy of the distal end portion 12c of the stop plate spring 10 cannot be sufficiently ensured (see fig. 4 of patent document 1). That is, the forming accuracy of at least a part of the metal sheet manufactured by the forming machine may not be sufficiently ensured.

A molding machine according to an aspect of the present invention includes:

a mandrel having a metal material disposed on an outer peripheral surface thereof;

a cutter which operates to cut the metal material; and

at least one punch provided so as to sandwich the metal material with the cutter, and operating in such a manner that: the metal material cut by the cutter and positioned on the mandrel is formed into one or more bent portions in cooperation with the outer peripheral surface of the mandrel.

In some embodiments, the punch and the cutter are displaced in the same direction by power from a common drive source.

In some embodiments, the punch and the cutter are mechanically coupled via one or more coupling members.

In some embodiments, the present invention further comprises:

a first attachment member coupled to or fitted to a distal end of the cutter, the distal end of the cutter being located on a side opposite to a proximal end of the mandrel; and

and a second mounting member coupled to or fitted into a distal end portion of the punch, the distal end portion of the punch being located on a side opposite to a proximal end portion on the side of the mandrel.

In some embodiments, the coupling member couples the first mounting member and the second mounting member.

In some embodiments, the punch, the cutter, and the connecting member are flat plate members.

In some embodiments, the coupling member has a recess for avoiding interference with the core shaft.

An aspect of the present invention relates to a method for molding a metal material, including:

a step of supplying a metal material to the outer peripheral surface of the mandrel;

moving a cutter in a first direction to cut the metal material; and

and a step of moving a punch in a second direction opposite to the first direction to form one or more bent portions in cooperation with the outer peripheral surface of the mandrel with respect to the metal material cut by the cutter and positioned on the mandrel.

In some embodiments, the first direction is a direction that is upward along a vertical direction.

An aspect of the present invention relates to a method for manufacturing a stop pawl member of a slider for a slide fastener, including:

a step of supplying a metal material, which is a base material of a stop pawl member of a slider for a slide fastener, to an outer peripheral surface of a core shaft;

moving a cutter in a first direction to cut the metal material; and

Effects of the invention

According to an aspect of the present invention, the forming accuracy of at least a part of the metal sheet manufactured by the forming machine can be improved.

Drawings

Fig. 1 is a schematic diagram of a system including a forming machine according to an aspect of the present invention, in which a metal material that is a flat metal plate is cut at both sides in a width direction thereof in an upstream press machine, and the metal material that is the flat metal plate is formed and cut in a downstream forming machine, and as a result, a stopper claw member is manufactured as a metal sheet. The stopping pawl member can be assembled into the slider body by any of various methods.

Fig. 2 is a schematic side view of a stopper claw member as an example of a metal sheet molded by a molding machine according to an embodiment of the present invention.

Fig. 3 is a schematic perspective view of a stopper claw member as an unlimited semi-finished product in a process of molding by the molding machine according to an embodiment of the present invention.

Fig. 4 is a schematic process diagram showing how a metal material is formed by a forming machine according to an embodiment of the present invention. In fig. 4(a), the narrow width portion of the metal material is bent to be small, and a U-shaped bent portion having a small bend is formed at the narrow width portion. The wide width portion is folded to be small, and an arc-shaped folded portion is formed in the wide width portion. In fig. 4(b), an arc-shaped bent portion is formed in the wide width portion of the metal material, and a terminal bent portion is formed in the vicinity of the end portion of the metal material. In fig. 4(c), the metal material is cut at the boundary of the unit length of the metal material. In fig. 4(d), a terminal bent portion is formed near the end of the metal material cut at the time of the present forming. In fig. 4(e), the degree of bending of the U-shaped bent portion which has been formed previously and is bent less is increased, with the result that a U-shaped bent portion which is bent more is formed.

Fig. 5 is a schematic diagram showing a schematic configuration of a molding machine according to an embodiment of the present invention, and schematically shows a plurality of punches, one cutter, and a metal material supply member arranged on an outer periphery of a mandrel. The cutter and the punch are disposed in such a manner as to sandwich the metal material.

Fig. 6 is a schematic perspective view of an end portion of a mandrel to which a metal material is supplied according to an embodiment of the present invention, schematically showing a mandrel protrusion protruding from an end surface.

Fig. 7 is a schematic perspective view showing a forming machine according to an embodiment of the present invention in which a cutter provided to sandwich a metal material and a punch are coupled to each other.

Fig. 8 is a schematic view showing a forming machine according to an embodiment of the present invention, in which a concave portion for avoiding interference with a mandrel is provided in a coupling member that couples a cutter and a punch.

Fig. 9 is a schematic view showing the operation of the molding machine according to one embodiment of the present invention, and schematically shows the formation of a U-shaped bent portion and an arc-shaped bent portion having a small bend by the cooperation of the mandrel and the first punch.

Fig. 10 is a schematic view showing a U-shaped bent portion formed by the operation of fig. 9 of the molding machine to be bent into a small bend in the metal material.

Fig. 11 is a schematic view showing the operation of the molding machine according to one embodiment of the present invention, schematically showing the formation of the arc-shaped bent portion and the end bent portion by the cooperation of the mandrel and the first and second punches.

Fig. 12 is a schematic view showing an arc-shaped bent portion and a terminal bent portion formed in a metal material by the operation of fig. 11 of the molding machine.

Fig. 13 is a schematic view showing the operation of the molding machine according to one embodiment of the present invention, and schematically shows the cutting of the metal material by the operation of the cutter.

Fig. 14 is a schematic view showing the metal material being cut by the operation of fig. 13 of the molding machine.

Fig. 15 is a schematic view showing the operation of the molding machine according to one embodiment of the present invention, and schematically shows the formation of the end bend portion by the cooperation of the mandrel and the first and third punches.

Fig. 16 is a schematic view showing the formation of a terminal bent portion in the metal material by the operation of the forming machine shown in fig. 15.

Fig. 17 is a schematic view showing the operation of the molding machine according to one aspect of the present invention, schematically showing the formation of a U-shaped bent portion having a large bend by the cooperation of the mandrel and the first, third, and fourth punches.

Fig. 18 is a schematic view showing a U-shaped bent portion formed by the operation of fig. 17 of the molding machine to be bent largely in a metal material.

Description of the reference numerals

80 metal material

86 of bent part

92 forming machine

110 mandrel

130 punch

133 punch

140 cutter

174 driving source

180 connecting member

Detailed Description

A non-limiting embodiment of the present invention will be described with reference to fig. 1 to 18. The above embodiments of the invention and the features included in the embodiments are not independent of each other. Those skilled in the art will be able to combine embodiments and/or features without undue experimentation. Furthermore, the person skilled in the art will also be able to understand the synergistic effect obtained by this combination. The overlapping description between the embodiments is omitted in principle. The drawings are mainly for illustrating the invention and may be simplified for convenience of drawing.

Next, a molding machine and a molding method of a metal material will be described as a non-limiting example. Further, a method of manufacturing a stop pawl member of a slider for a slide fastener, which is one non-limiting example of a metal piece manufactured by a molding machine, will be described. The metal sheet manufactured by the molding machine is not limited to a finished product, and may be a semi-finished product processed by another manufacturing apparatus. The metal material formed by the forming machine may be composed of various metals or metal alloys. Examples of the metal material or metal alloy include stainless steel (SUS), aluminum, iron, zinc, and copper-zinc alloy.

In some cases, the metal material exhibits elasticity after being formed by a forming machine, but is not limited thereto. Additionally or alternatively, the metal material may be in any form such as a metal wire, a metal foil, a metal plate, or the like. Additionally or alternatively, the cross-sectional shape of the metal material may be circular, triangular, rectangular, or other polygonal shape. Additionally or alternatively, the metal material may be a long strip, and cut and formed into a sheet by a forming machine.

The metal sheet obtained from the metal material may be various members according to the embodiment. For example, the metal sheet may be a mechanical component, an electrical component, a decorative component, or other types of components. As the mechanical component, the stopper claw member of the slider for a slide fastener is exemplified as described above, but the mechanical component is not limited thereto, and may be a structural component (for example, various metal frames) of various moving bodies such as an airplane, a motorcycle, a tricycle, a bicycle, a boat, and a submarine, a structural component of various manufacturing apparatuses, a toy such as a doll, and other kinds of articles. The electric component may be, for example, various terminal components such as a connection terminal and an electrode terminal, or other wiring components.

For convenience of explanation, a non-limiting example of manufacturing the stop pawl member of the slider for a slide fastener by forming and cutting a metal material as a metal plate material by a forming machine will be described below. The metal material is long and is fed downstream from a roll not shown. The metal material has ductility and ductility, and is bent along the outer peripheral surface of the mandrel by molding with a molding machine provided on the downstream side of the mandrel. The metal material returns to the original shape but retains the bent shape. The metal material is cut by a cutter assembled in a molding machine to obtain a metal piece. The stop pawl member of the slider for slide fastener is not limited to the shape illustrated in the drawings, and various other shapes can be adopted. The outer peripheral surface of the mandrel and the punch surface of the punch can be designed as desired by those skilled in the art according to the desired shape of the stop pawl member.

Fig. 1 is a diagrammatic view of a system 99 including the molding machine 92 of the present invention. In the upstream press 91, the metal material 80, which is a flat metal plate, is subjected to shearing work on both sides in the width direction thereof. The metal material 80, which is a flat metal plate, is formed and cut by the forming machine 92 on the downstream side. As a result, the stop claw member 70 is manufactured as a metal sheet. The stopping pawl member 70 can be assembled into the slider body by any of various methods.

The metal material 80 fed from a roll (not shown) is subjected to shearing processing by a punch 91. The press 91 punches the metal material 80 with one or more punches. The punch 91 includes one or more dies and one or more punches. The die or punch is appropriately given a shape to cut and process the metal material 80 into a desired shape. In some cases including the illustrated example, the concave portions are formed on both sides in the width direction of the metal material 80 by the punch 91. The recesses may be provided in the same manner on both sides in the width direction of the metal material 80. The width direction of the metal material 80 is orthogonal to the longitudinal direction and the thickness direction of the metal material 80. The longitudinal direction of the metal material 80 coincides with the direction in which the metal material 80 flows from the press 91 to the molding machine 92. The thickness direction of the metal material 80 may be a direction orthogonal to a pair of flat surfaces of the metal material 80.

As shown in fig. 1, the metal material 80 fed from the press 91 to the molding machine 92 is formed by connecting profile members (japanese: パターン) each having a unit length 80U. In the unit length 80U, the metal member 80 includes an upstream end 81, a downstream end 82, a narrow portion 83 between the upstream end 81 and the downstream end 82, a wide portion 84 between the upstream end 81 and the narrow portion 83, and a wide portion 85 between the downstream end 82 and the narrow portion 83. The wide width portion 84 is located on the upstream side of the wide width portion 85. As described above, there are various examples of the shape of the metal piece obtained from the metal material 80, even if limited to the stop pawl member of the slider for a slide fastener. Therefore, the description in this paragraph can be understood as a method of shearing the metal material 80 by the punch 91 in a manner suitable for manufacturing the stopper claw member as a certain non-limiting example. Obviously, it is contemplated that the metal material 80 is shear-worked into other shapes by the punch 91. The

end portions

81 and 82 are narrower than the

wide portions

84 and 85, similarly to the narrow portion 83. The upstream end 81 and the downstream end 82 may be referred to as a first end and a second end, respectively. The

wide portions

84 and 85 may be referred to as first and second wide portions, respectively.

The metal sheet, i.e., the stopper claw member 70 in the illustrated example, is continuously discharged from the metal material 80 by molding and cutting by the molding machine 92 described in detail later. The end 82 included in the portion of the unit length 80U at the time of molding the portion of the unit length 80U at this time by the molding machine 92 is a free end generated by cutting the metal material 80 in the process of molding the portion of the unit length 80U at the previous time by the molding machine 92. When the molding machine 92 starts molding the part of the unit length 80U of this time, the end 81 included in the unit length 80U is connected to the end 82 of the unit length 80U on one upstream side. At this time of molding, the molding machine 92 cuts the end portion 81 and the end portion 82, and thereby the

end portions

81 and 82 become free end portions. At the same time, a metal piece corresponding to or identical to the portion of the unit length 80U to be molded this time is cut out from the metal material 80 by the molding machine 92.

Fig. 2 is a schematic side view of the stop pawl member 70 as one example of the metal sheet molded by the molding machine 92. Fig. 3 is a schematic perspective view of the stopper claw member 70 as an unlimited semi-finished product in the process of molding by the molding machine 92. As is apparent from fig. 2 and 3, the end bend 86 is formed between the end portion 81 and the wide portion 84, the end bend 87 is formed between the end portion 82 and the wide portion 85, and the U-shaped bend 88 is formed in the narrow portion 83 by molding using a molding machine 92. By the molding machine 92, the arcuate bent portion 89m is further formed in the wide width portion 85, and the arcuate bent portion 89n is further formed in the wide width portion 84. The direction of conveyance of the metal material 80 as the base material cannot be recognized from the stopper claw member 70 itself. However, the end bend 86 is located upstream of the end bend 87 in the conveying direction of the metal material 80 described with reference to fig. 1. The arcuate bend 89m is located on the downstream side of the arcuate bend 89 n. The

end portions

81 and 82 and the narrow portion 83 are relatively narrow in width, and the

bent portions

86, 87, and 88 are easily formed in the metal member 80. From the above viewpoint, in some cases including the illustrated example, the metal material 80 may have one or more narrow width portions in order to form one or more bent portions. The number, position, and length of the narrow portions may be changed according to the embodiment.

Fig. 4 is a schematic process diagram showing how the metal material 80 is molded by the molding machine 92. In fig. 4(a), the narrow portion 83 of the metal material 80 is bent to be small, and a U-shaped bent portion 88 which is bent to be small is formed in the narrow portion 83. The wide width portion 84 is folded to be small, and an arc-shaped folded portion 89n is formed in the wide width portion 84. In fig. 4(b), an arc-shaped bent portion 89m is formed in the wide portion 85 of the metal member 80, and a terminal bent portion 87 is formed in the vicinity of the end portion 82 of the metal member 80. In fig. 4(c), the metal member 80 is cut at the boundary of the unit length 80U of the metal member 80. In fig. 4(d), a terminal bent portion 86 is formed near the end portion 81 of the metal material 80 cut at the time of the present forming. In fig. 4(e), the degree of bending of the U-shaped bent portion 88 which has been formed so far and is bent less is increased, with the result that the U-shaped bent portion 88 which is bent more is formed. When the stopper claw member 70 is discharged from the molding machine 92, the stopper claw member 70 is deformed from the shape shown in fig. 4(e) by its elasticity, and the gap between the arc-shaped bent portion 89m and the arc-shaped bent portion 89n can be increased.

Fig. 5 is a schematic diagram showing a schematic configuration of the molding machine 92. The molding machine 92 includes a mandrel 110, a mandrel support 120, a punch 130, a cutter 140, a supply member 150, a controller 170, and a drive source 174. A plurality of punches 130, one cutter 140, and a metal material supply member 150 are disposed on the outer periphery of the mandrel 110. In some cases, the mandrel 110, punch 130, and cutter 140 of the forming machine 92 are movable components. In some cases, a plurality of drive sources 174 whose number is equal to or less than the total number of movable members is provided. Illustration of a power transmission mechanism provided between the drive source 174 and the movable member is omitted.

The metal material 80 is disposed on the outer peripheral surface of the mandrel 110. In some cases including the illustrated example, the mandrel 110 is a columnar member, for example, a metal columnar member, but is not limited thereto. Further, the mandrel 110 has one or more mandrel protrusions 30 extending in the axial direction. The axial direction in which the mandrel protrusion 30 extends may coincide with the longitudinal direction of the mandrel 110. The mandrel 110 has an outer peripheral surface suitable for forming one or more bent portions in the metal material 80 by the cooperation of the mandrel 110 and the punch 130.

The mandrel support portion 120 has a space extending in the axial direction, and supports the mandrel 110 inserted or disposed in the space. The mandrel support portion 120 is, for example, a metal cylindrical member. In some cases, the inner circumferential surface profile that defines the space of the mandrel support portion 120 is similar to the outer circumferential surface profile of the mandrel 110, as viewed in the axial direction of the mandrel 110. The inner circumferential surface contour defining the space of the mandrel support portion 120 is slightly larger than the outer circumferential surface contour of the mandrel 110 in order to allow axial movement of the mandrel 110.

The mandrel 110 can be positioned so as to protrude from the mandrel support 120. In some cases, the mandrel 110 can be relatively moved with respect to the mandrel support 120. Alternatively or additionally, the mandrel support 120 can be moved relative to the mandrel 110.

In some cases including the illustrated example, as the punch 130, first to fourth punches 131 to 134 are provided. It is possible to conceive an embodiment in which the first, second, and

fourth punches

131, 132, and 134 are omitted and only the third punch 133 is provided. The first, second, third and fourth elements are elements of the same name, and are added here for distinguishing punches, and are omitted if there is no or low necessity for distinguishing.

Each punch 130 is provided on the outer periphery of the mandrel 110, and operates to form one or more bent portions in the metal material 80 in cooperation with the outer peripheral surface of the mandrel 110. The third punch 133 is provided so as to sandwich the metal material 80 between the third punch and the cutter 140, and operates as follows: the metal material 80 cut by the cutter 140 and positioned on the mandrel 110 forms one or more bent portions 86 in cooperation with the outer peripheral surface of the mandrel 110. The first, second, and

fourth punches

131, 132, 134 are disposed between the third punch 133 and the cutter 140. That is, in some cases including the illustrated example, a plurality of punches are provided between the third punch 133 and the cutter 140.

Each punch 130 moves toward the mandrel 110, and presses the metal material 80 disposed on the outer peripheral surface of the mandrel 110. The metal material 80 is pressed between the punch 130 and the mandrel 110, whereby the metal material 80 is molded into a shape corresponding to the outer peripheral surface of the mandrel 110 and/or the punching surface of the punch 130. As a result, one or more bent portions are formed in the metal material 80. The bent portion may be a portion bent at any angle other than 180 degrees. The bent portion may include various bent shapes such as a V shape, a U shape, a C shape, a low ridge shape, and a steep ridge shape. In some cases, including the illustrated example, the punching face of the punch 130 may be an end face of the punch 130 on the side of the mandrel 110, i.e., a face opposite to the mandrel 110.

In the invention example of patent document 1, a blade for cutting the material is provided in the first punch, and the material is bent by the cooperation of the first punch and the mandrel. The material is cut and bent by the first punch. Since the metal material is driven in the same direction by the first punch at the time of cutting and bending, there is a possibility that the forming accuracy of the tip end portion of the stop plate spring cannot be sufficiently secured.

In the present invention, the metal material 80 is sandwiched between the punch 133 and the cutter 140. The punch 133 operates in the following manner: the metal material 80 cut by the cutter 140 and positioned on the mandrel 110 forms one or more bent portions 86 in cooperation with the outer peripheral surface of the mandrel 110. The first direction of the cutter 140 toward the metal material 80 is not coincident with the second direction of the punch 133 toward the metal material 80, and in some cases, including the illustrated example, the directions of travel are opposite. This can further improve the molding accuracy of the metal material 80 as compared with the case of patent document 1.

In some cases including the illustrated example, the punch 130 moves toward the mandrel 110 while being guided by the guide cylinder 160. The punch 130 is moved closer to the mandrel 110 or away from the mandrel 110 by power supplied from a driving source 174 such as a motor via a power transmission mechanism, respectively. The motor may be a stepper motor controlled with a pulse signal. The drive source 174 is not limited to a motor, and may be another drive source such as an engine. The power transmission mechanism may be any mechanism that converts the rotational force generated by the drive source 174 into the linear motion of the punch. The power transmission mechanism may include, for example, a combination of a pinion and a rack, a crank mechanism, or any other mechanism. The position where the punch 130 is closest to the mandrel 110 is referred to as a machining position, and the position where the punch 130 is farthest from the mandrel 110 is referred to as a retracted position.

The cutter 140 operates to cut the metal material 80. The cutter 140 reciprocates between the retracted position and the cutting position by power supplied from a drive source 174, for example, a motor, via a power transmission mechanism while being guided by the guide tube 160. As described above, the drive source 174 and the power transmission mechanism may take various forms according to the embodiment. When the cutter 140 is at the cutting position, the metal material 80 is cut by the cutting edge 146 of the cutter 140. In some cases, the cutter 140 cuts the metal material 80 at the boundary of the unit length 80U of the metal material 80 as described above.

In some cases, including the illustrated example, the cutter 140 is configured to push a portion of the metal material 80, the end 81 in the illustrated example, on the mandrel 110 when cutting the metal material 80. The portion of metal material 80 on mandrel 110, end 81 in the example shown, is moved away from mandrel 110 by cutter 140. As shown, the end 81 of the metal material 80 may be pushed upward by the cutter 140. The reliability of cutting the metal material 80 can be improved, and the method is also suitable for molding the metal material 80.

The controller 170 performs control to move each of the punch 130 and the cutter 140 disposed on the outer periphery of the mandrel 110 at an appropriate timing. For example, the controller 170 provides instructions to the drive source 174. The drive source 174 generates a predetermined amount of power in accordance with a command from the controller 170. The power generated by the drive source 174 is transmitted to the punch 130 via the power transmission mechanism, and the punch 130 is moved. The cutter 140 is also moved by the power from the drive source 174.

Each punch 130 moves from the retracted position to the machining position at an appropriate timing based on the control of the controller 170. Each punch 130 is moved from the machining position to the retracted position at an appropriate timing under the control of the controller 170. The cutter 140 moves from the retracted position to the cutting position at an appropriate timing based on the control of the controller 170. The cutter 140 moves from the cutting position to the retracted position at an appropriate timing based on the control of the controller 170.

The controller 170 may include a sequencer. The controller 170 may be suitably constructed of hardware, software, or a combination thereof. The hardware may include a CPU, a memory, a bus, an I/O circuit, an interface circuit, an image processing circuit, an image display device, and the like. The software may include one or more programs that can be executed by the CPU.

The supply part 150 includes a first die 151 and a second die 152. The metal material 80 is fed onto the mandrel 110 through a gap between the first die 151 and the second die 152. The metal material 80 is fed from a roll to the downstream side by a conveying unit, not shown, such as a roll-to-roll conveying device.

In some cases including the illustrated example, in order to achieve individual driving of the punches 130, a plurality of driving sources 174 that generate individual power for each punch 130 are provided. Similarly, a plurality of power transmission mechanisms for transmitting individual power to each punch 130 are provided. In some cases including the example of the drawings, the common drive source 174 and the power transmission mechanism are employed for the third punch 133 and the cutter 140 provided so as to sandwich the metal material 80, but the present invention is not limited to this. The meaning of this point can be better understood based on the description below.

Fig. 6 is a schematic perspective view of an end portion of the mandrel 110 to which the metal material 80 is supplied. The mandrel 110 includes a mandrel main body 10, and a mandrel protrusion 30 protruding in the axial direction from an end surface 10s of the mandrel main body 10. The metal material 80 is disposed on the mandrel body 10 and/or the mandrel protrusion 30. In some cases, including the illustrated example, the mandrel protrusions 30 act in the following manner: by its cooperation with the one or more punches 130, the U-shaped bent portion 88 is formed in the metal material 80, and the one or more terminal bent portions 86 are formed at the one or more end portions 81 of the metal material 80. The mandrel protrusion 30 and/or the mandrel member provided with the mandrel protrusion 30 can be ensured to have a sufficient size, and the durability thereof can be improved.

As shown in fig. 6, the mandrel 110 includes a first surface 111, a second surface 112, a third surface 113 connecting the first surface 111 and the second surface 112, and a fourth surface 114 provided on the opposite side of the third surface 113 (facing the opposite side of the third surface 113). The wide width portion 84 is formed and/or bent on the first surface 111 of the mandrel 110 by a first punch 131. The wide width portion 85 and the end portion 82 are formed and/or bent on the second surface 112 of the mandrel 110 by a second punch 132. The narrow portion 83 is formed and/or bent on the third surface 113 of the mandrel 110 by the first and

fourth punches

131 and 134. On the fourth surface 114 of the mandrel 110, the end portion 81 is shaped and/or bent by a third punch 133. The first, third and

fourth faces

111, 113, 114 are present in the mandrel protrusion 30. The second face 112 is not on the mandrel protrusion 30. In other words, the mandrel protrusion 30 has the first, third, and

fourth surfaces

111, 113, and 114, and does not have the second surface 112.

The mandrel protrusion 30 has a fifth surface 35 extending so as to intersect or be orthogonal to the end surface 10s of the mandrel main body 10 in the axial direction. The fifth surface 35 has a region extending in the moving direction in which the punch 130 (the fourth punch 134 in the illustrated example) is moved from the retracted position to the machining position to form the U-shaped bent portion 88 having a large bend. The fifth surface 35 is concave so as not to interfere with or slightly interfere with the wide portion 85 of the metal member 80 after molding.

As can be seen in fig. 6, in some instances, the mandrel protrusion 30 includes a core 38 for forming a U-shaped fold 88, a wall 37 for forming a terminal fold 86, and an intermediate portion 36 connecting the core 38 and the wall 37. In some cases including the illustrated example, the spindle protrusion 30 is provided with a recess recessed upward. In some cases including the drawing example, the first face 111 is an upper face, and the second to

fourth faces

112, 113, 114 are side faces.

Fig. 7 is a schematic perspective view showing that the cutter 140 and the punch 133 provided to sandwich the metal material 80 in the molding machine 92 are coupled. Fig. 8 is a schematic view showing that a concave portion 183 for avoiding interference with the mandrel 110 is provided in a coupling member 180 that couples the cutter 140 and the punch 133 in the molding machine 92.

In the present invention, the third punch 133 and the cutter 140 are disposed so as to sandwich the metal material 80. In some cases including the illustrated example, the third punch 133 is disposed above the cut portion of the metal material 80 (to be cut by the cutter 140 or having been cut), and the cutter 140 is disposed below the cut portion of the metal material 80. Another example in which the third punch 133 is disposed below and the cutter 140 is disposed above is also conceivable. The first direction (first traveling direction) in which the cutter 140 faces the metal material 80 is not coincident with the second direction (second traveling direction) in which the punch 133 faces the metal material 80, and in some cases including the illustrated example, the traveling directions of the two directions are opposite to each other. This can further improve the molding accuracy of the metal material 80 as compared with the case of patent document 1. Alternatively, in the present invention, a common drive source 174 and power transmission mechanism are used between the third punch 133 and the cutter 140. This allows the drive source 174 and the power transmission mechanism, which are necessary for driving the cutter 140, to be omitted or simplified. In some cases, including the figure examples, the first direction is a direction that is upward along a vertical direction. This allows the cut portion of the metal material 80 to be separated from the mandrel 110. The direction directed upward along the vertical direction may be, for example, a direction at an arbitrary angle between 0 ° and 180 ° from the ground toward the sky. However, in some cases, the direction directed upward along the vertical direction may be a direction extending at an angle of 45 ° to 135 ° with respect to the ground.

As is apparent from fig. 7 and 8, in some cases including the examples of the drawings, the punch 133 and the cutter 140 can be displaced in the same direction by the power from the common drive source 174. Further, as can be seen from fig. 7 and 8, in some cases including the illustrated example, the punch 133 and the cutter 140 may be mechanically coupled via one or more coupling members 180. The punch 133 and the cutter 140 may be mechanically coupled to each other in one or both of a form in which the punch 133 and the cutter 140 are directly coupled to each other by one or more coupling members 180 and a form in which the punch 133 and the cutter 140 are indirectly coupled to each other by one or more coupling members 180.

As can be seen from fig. 7 and 8, in some cases including the illustrated example, the molding machine 92 includes: a first attachment member 191 to which a distal end 142 of the cutter 140 is coupled or fitted, the distal end 142 being located on the opposite side of a proximal end 141 on the side of the mandrel 110; and a second attachment member 192 coupled to or fitted to a distal end 133q of the punch 133, the distal end 133q being located on the opposite side of the proximal end 133p on the side of the mandrel 110. The coupling member 180 couples the first mounting member 191 and the second mounting member 192. The punch 133 and the cutter 140 can be coupled in a space-saving manner in the molding machine 92. The specific shapes of the first and second mounting

members

191 and 192 are various and are not limited to the illustrated examples.

In some cases including the illustrated example, the concave portion of the distal end 142 of the cutter 140 is fitted with the first convex portion 191m of the first mounting part 191. The concave portion of the distal end portion 133q of the punch 133 is fitted to the convex portion 192g of the second mounting member 192. The concave portion of the first end 181 of the coupling member 180 is fitted to the second convex portion 191n of the first attachment member 191, and the second convex portion 191n is not fitted to the concave portion of the distal end 142 of the cutter 140. The concave portion of the second end 182 of the coupling member 180 is fitted to the convex portion 192g of the second mounting member 192, and the convex portion 192g is fitted to the concave portion of the distal end 133q of the punch 133. In some cases, including the illustrated example, the first mounting member 191 is a lower mounting member and the second mounting member 192 is an upper mounting member. The cutter 140, the punch 133, and the connecting member 180 extend in the vertical direction. Another example is conceivable in which the cutter 140, the punch 133, and the coupling member 180 are provided with a convex portion, and the mounting

members

191 and 192 are provided with a concave portion.

As can be seen from fig. 7 and 8, in some cases including the illustrated example, the punch 133, the cutter 140, and the coupling member 180 are flat plate-like members. In some cases, including the illustrated example, the punch 133 and the cutter 140 are laminated on the joining member 180. The punch 133 and the cutter 140 can be coupled in a space-saving manner in the molding machine 92.

As can be seen from fig. 7 and 8, in some cases including the illustrated example, the coupling member 180 has a recess 183 for avoiding interference with the spindle 110. The punch 133 and the cutter 140 can be coupled in a space-saving manner in the molding machine 92.

Next, the operation of the molding machine 92 will be described as a non-limiting example with reference to fig. 9 to 18. Fig. 9 is a schematic diagram showing the operation of the forming machine 92, schematically showing the formation of the U-shaped bent portion 88 with a smaller bend by the cooperation of the mandrel 110 and the first punch 131. Fig. 10 is a schematic view showing a U-shaped bent portion 88 formed by the operation of the forming machine 92 in fig. 9 and having a small bend in the metal material 80.

As is apparent from fig. 9 and 10, the metal material 80 is fed to the mandrel 110 through the gap between the first die 151 and the second die 152 of the feeding member 150, the metal material 80 is fed to the end of the mandrel 110 protruding from the end surface 120s of the mandrel support 120, the metal material 80 fed to the mandrel 110 is arranged flat and linearly on the mandrel 110 before being pressed by the first punch 131, the first punch 131 is moved toward the mandrel 110 by power from the first drive source 174 controlled by the controller 170, the metal material 80 is pressed and bent between the first punch 131 and the mandrel 110 when the first punch 131 reaches the machining position, a U-shaped bent portion 88 with a small bend is formed in the metal material 80, the punching surface of the first punch 131 is arranged to face the first surface 111 and the third surface of the mandrel 110 when the first punch 131 is located at the machining position, the end 82 of the metal material 80 is bent until contacting the main body 10, and the end surface L and the cutter 132 of the metal material 80 is located at the position 351 to the end surface of the mandrel 110 when the metal material 80 is fed to the mandrel 120, and the cutter L is located at the fourth end surface 132.

Fig. 11 is a schematic view showing the operation of the molding machine 92, and schematically shows the formation of the arc-shaped bent portion 89m and the end bent portion 87 by the cooperation of the core 110 and the first and

second punches

131 and 132. Fig. 12 is a schematic view showing the formation of the arcuate bent portion 89m and the terminal bent portion 87 in the metal material 80 by the operation of the molding machine 92 shown in fig. 11. Following the first punch 131, the second punch 132 is correspondingly moved toward the mandrel 110 by power from a second drive source 174 controlled by the controller 170. When the second punch 132 reaches the machining position, the metal material 80 is pressed and bent between the second punch 132 and the core shaft 110, and an arc-shaped bent portion 89m and a terminal bent portion 87 are formed in the metal material 80. The stamping face of the second punch 132 is arranged to oppose the second face 112 of the mandrel 110 when the second punch 132 is in the machining position.

Fig. 13 is a schematic view showing the operation of the molding machine 92, and schematically shows the cutting of the metal material 80 by the operation of the cutter 140. Fig. 14 is a schematic view showing the metal material being cut by the operation of the molding machine 92 shown in fig. 13. After the second punch 132, the cutter 140 is moved in the vertical direction and/or upward by the power from the third drive source 174 controlled by the controller 170. The third punch 133 mechanically coupled to the cutter 140 also moves in the same direction as the cutter 140. When the cutter 140 reaches the cutting position, the metal material 80 is cut at the boundary of the adjacent unit length 80U by the cutter 140. The end of the metal material 80 on the mandrel 110 located on the downstream side of the cutting position of the metal material 80 is slightly displaced upward from the mandrel 110 by the cutter 140. The cutter 140 returns to the retracted position after cutting the metal material 80. Further, the second punch 132 also returns to the retracted position.

Fig. 15 is a schematic view showing the operation of the molding machine 92, and schematically shows the formation of the bent end portion 86 by the cooperation of the core shaft 110 and the first and

third punches

131 and 133. Fig. 16 is a schematic view showing the formation of the terminal bent portion 86 in the metal material 80 by the operation of the forming machine 92 shown in fig. 15. After the cutter 140 cuts the metal material 80, the third punch 133 is moved in the vertical direction and/or downward by the power from the third drive source 174 (shared with the cutter 140) controlled by the controller 170. The cutter 140 mechanically coupled to the third punch 133 also moves in the same direction as the third punch 133. When the third punch 133 reaches the processing position, the metal material 80 is pressed and bent between the third punch 133 and the mandrel 110, and the end bend 86 is formed in the metal material 80. The third punch 133 has a projection 133f, and the metal member 80 (end 81) is sandwiched between the projection 133f and the fourth surface 114 of the mandrel 110. The punching surface of the third punch 133 is disposed to be opposed to the fourth surface 114 when the third punch 133 is located at the working position. Further, the wide width portion 84 of the metal material 80 is pressed and bent between the third punch 133 and the core 110, and the arcuate bent portion 89n of the wide width portion 84 is further bent.

Specifically, the amount of protrusion of the mandrel 110 from the mandrel support 120 and/or the movement of the mandrel support 120 relative to the mandrel 110 are performed, as is apparent from a comparison between fig. 16 and 18, the mandrel 110 is shifted from a state in which the mandrel 110 protrudes by a length L1 from the end surface 120s of the mandrel support 120 to a state in which the mandrel protrudes by a length L2 from the end surface 120s of the mandrel support 120, the length L2 is smaller than the length L1, as is apparent from a comparison between fig. 16 and 18, the length L2 is about half the length L1, and accordingly, the metal material 80 (metal piece cut out from the metal material 80) on the mandrel 110 is shifted onto the mandrel protrusion 30 of the first shaft member 10, and another example is conceivable in which the mandrel 80 is shifted onto the mandrel protrusion 30 of the first shaft member 10 by a method other than changing the amount of protrusion of the mandrel 110 from the support 120.

Fig. 17 is a schematic diagram showing the operation of the forming machine 92, and schematically shows the formation of the U-shaped bent portion 88 having a large bend by the cooperation of the mandrel 110 and the first, third, and

fourth punches

131, 133, and 134. Fig. 18 is a schematic view showing a U-shaped bent portion 88, which is bent largely, formed in the metal material 80 by the operation of the molding machine 92 shown in fig. 17. Following the third punch 133, the fourth punch 134 is correspondingly moved toward the mandrel protrusion 30 of the mandrel 110 by power from a fourth drive source 174 controlled by the controller 170. When the fourth punch 134 reaches the processing position, the metal material 80 is pressed and bent between the fourth punch 134 and the mandrel protrusion 30, and a U-shaped bent portion 88 having a large bend is formed in the metal material 80. The punching surface of the fourth punch 134 is disposed opposite to the fifth surface 35 of the mandrel protrusion 30 when the fourth punch 134 is located at the machining position.

In some cases, including the illustrated example, the mandrel 110 and/or the mandrel support 120 are then moved in such a manner that the mandrel protrusions 30 of the mandrel 110 do not protrude from the end surface 120s of the mandrel support 120. Thereby, the stop claw member 70 is released from the mandrel 110 and is supplied to the storage box or the bag via or without a discharge path not shown.

In some cases including the example of the figures, the bent portion (arc-shaped bent portion 89m) near the portion of the metal material 80 at the position of the end 82 of the metal material 80 cut by the cutter 140 to cut out the metal piece from the metal material 81 (in the last forming process of the forming machine 92) is formed before the metal material 80 is cut by the cutter 140 to cut out the metal piece including the bent portion 89m (in the present forming process of the forming machine 92). In the process of pressing the metal material 80 against the second surface 112 side of the mandrel 110 by the second punch 132, a new metal material 80 can be made to flow into the molding machine 92. It is possible to avoid or suppress the length of the metal piece cut out from the metal material 80 from becoming shorter than the designed length.

Based on the above description, the present specification also discloses the following invention relating to a method of molding a metal material and an invention relating to a method of manufacturing a locking pawl member of a slider for a slide fastener.

A method of forming a metal material, comprising:

a step of supplying the metal material 80 to the outer peripheral surface of the mandrel 110;

a step of moving the cutter 140 in a first direction to cut the metal material 80; and

and a step of moving the punch 133 in a second direction opposite to the first direction, and forming one or more bent portions 86 in cooperation with the outer peripheral surface of the mandrel 110 with respect to the metal material 80 cut by the cutter 140 and positioned on the mandrel 110 by the punch 133.

A method for manufacturing a stop pawl member of a slider for a slide fastener, comprising:

a step of supplying a metal material 80 as a base material of a stop pawl member 70 of a slider for a slide fastener onto an outer peripheral surface of a core shaft 110;

Fig. 9, 13, and 15 clearly show the steps of each method in the metal material molding method and the method of manufacturing the locking pawl member of the slider for slide fastener, and the description thereof is as described above, and the overlapping description is omitted.

Based on the above teaching, a person skilled in the art can modify the embodiments variously. Reference signs placed within the scope of the claims are provided for reference only and are not intended to limit the scope of the claims.

Claims

1. A molding machine is characterized by comprising:

a mandrel (110) having a metal material (80) disposed on the outer peripheral surface thereof;

a cutter (140) controlled so as to reciprocate between a retracted position and a cutting position, and cutting the metal material (80) when the cutter is positioned at the cutting position; and

at least one punch (133) provided so as to sandwich the metal material (80) with the cutter (140), the at least one punch (133) being controlled so as to reciprocate between a processing position close to the mandrel (110) and a retracted position away from the mandrel (110), the at least one punch (133) having a protrusion (133 f) that forms one or more bent portions (86) in cooperation with an outer peripheral surface of the mandrel (110) with respect to the metal material (80) that is cut by the cutter (140) and is positioned on the mandrel (110),

the punch (133) and the cutter (140) are displaced in the same direction by power from a common drive source (174), and when the cutter (140) moves toward the cutting position, the punch (133) moves toward the retracted position.

2. The molding machine of claim 1, wherein:

the punch (133) and the cutter (140) are mechanically coupled via one or more coupling members (180).

3. The molding machine according to claim 2, further comprising:

a first mounting member (191) coupled to a distal end (142) of the cutter (140), the distal end (142) of the cutter (140) being located opposite a proximal end (141) on the side of the mandrel (110); and

and a second mounting member (192) coupled to a distal end portion (133 q) of the punch (133), the distal end portion (133 q) of the punch (133) being located on the opposite side of a proximal end portion (133 p) on the side of the mandrel (110).

4. The molding machine of claim 3, wherein:

the first attachment member (191) is fitted to the distal end (142) of the cutter (140),

the second mounting member (192) is fitted to a distal end (133 q) of the punch (133).

5. The molding machine according to claim 3 or 4, wherein:

the coupling member (180) couples the first mounting member (191) and the second mounting member (192).

6. The molding machine of claim 2, wherein:

the punch (133), the cutter (140), and the connecting member (180) are flat plate-like members.

7. The molding machine of claim 2, wherein:

the coupling member (180) has a recess (183) for avoiding interference with the spindle (110).

8. A forming method of a metal material using the forming machine according to claim 1, comprising:

a step of supplying a metal material (80) to the outer peripheral surface of the mandrel (110);

a step of moving the cutter (140) in a first direction to cut the metal material (80); and

and a step of moving the punch (133) in a second direction opposite to the first direction, and forming one or more bent portions (86) on the metal material (80) cut by the cutter (140) and positioned on the mandrel (110) by the punch (133) cooperating with the outer peripheral surface of the mandrel (110).

9. The method of forming a metal material according to claim 8, wherein:

the first direction is a direction that is directed upward along a vertical direction.

10. A method for manufacturing a stop pawl member of a slider for a slide fastener using the molding machine according to claim 1, comprising:

a step of supplying a metal material (80) as a base material of a stop pawl member (70) of the slider for a slide fastener onto an outer peripheral surface of the core shaft (110);

11. The method of manufacturing a stop pawl member of a slider for a slide fastener according to claim 10, wherein: