JP2015003332A - Camber molding equipment of plate spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the provision of various camber shapes with one piece of molding equipment, and the execution of adjustment work in a short time in changing the camber shapes.SOLUTION: Camber molding equipment 10 has: a chain 22; a plurality of chain support parts 18 which are arranged at intervals in a first direction to which the chain extends, over which the chain is bridged, and support the chain in a second direction crossing the first direction; position adjustment mechanisms 14 which are provided in each of the plurality of chain support parts, and adjust the positions of the chain support parts in the second direction; and pressing means (36, 39, etc.) which contact one surface of a plate member to press the plate member toward the chain when the plate member 40 is arranged so that the other surface of the plate member contacts the chain bridged over the plurality of chain support parts.

Description

  The technology disclosed in this specification relates to a technology for manufacturing a leaf spring (finished product) from a plate material (finished product). Specifically, the present invention relates to a camber molding apparatus that imparts a camber shape (that is, a curved shape (warp)) to a plate material.

  Patent Document 1 discloses a camber forming apparatus for a leaf spring. This camber molding apparatus includes an upper variable mold and a lower variable mold. Each variable forming die is provided with a plurality of forming fingers, and the position of each forming finger in the vertical direction can be adjusted. For this reason, in this camber shaping | molding apparatus, the position of the up-down direction of each shaping | molding finger of each variable shaping | molding die is first adjusted based on the camber shape provided to a board | plate material. Next, a plate material is disposed between the upper variable mold and the lower variable mold, and the plate material is pressed by the upper variable mold (molded finger group) and the lower variable mold (molded finger group). Thereby, a desired camber shape is imparted to the plate material.

JP-A-8-24976

  In a conventional camber forming apparatus, a desired camber shape can be imparted to a plate material, but a large number of forming fingers are provided in each variable forming die. For this reason, it is necessary to adjust the position of each of a large number of molding fingers according to the camber shape to be applied. Therefore, if the camber shape to be applied to the plate material is changed, there is a problem that the change operation takes a long time.

  The present specification discloses a camber molding apparatus that can impart various camber shapes with a single molding apparatus and that can perform adjustment work when changing the camber shape in a short time.

  The camber molding apparatus disclosed in this specification imparts a camber shape to a plate material. The camber molding apparatus includes a chain and a plurality of chain support portions that are arranged at intervals in a first direction in which the chain extends, and that supports the chain in a second direction across the chain and intersecting the first direction, A position adjustment mechanism that adjusts the position of the chain support portion in the second direction and a chain that spans the chain support portions make contact with one surface of the plate material. And a pressing means for pressing the plate material toward the chain by contacting the other surface of the plate material when the plate material is disposed.

  In this camber molding apparatus, first, the positions of the plurality of chain support portions are adjusted according to the camber shape to be applied. And a camber shape is provided to a board | plate material by pressing a board | plate material to the chain spanned by the chain support part adjusted in position. Therefore, by adjusting the position of the chain support portion, various camber shapes can be imparted with a single molding apparatus. In addition, since the chain support section on which the chain is bridged is arranged at an interval in the longitudinal direction of the chain, the length of the chain support section with respect to the length of the chain (the length in the longitudinal direction of the plate material to be molded) The number can be reduced. For this reason, the adjustment operation | work at the time of changing a camber shape can be performed in a short time.

The figure which shows schematic structure of the camber shaping | molding apparatus of an Example (before camber shaping | molding). The figure which shows schematic structure of the camber shaping | molding apparatus of an Example (at the time of camber shaping | molding). The block diagram which shows the structure of the control system of the camber shaping | molding apparatus of an Example. The flowchart which shows the procedure at the time of camber shaping | molding using the camber shaping | molding apparatus of an Example. The front view which expands and shows a part of chain. The top view which expands and shows a part of chain.

  The main features of the embodiments described below are listed. The technical elements described below are independent technical elements and exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Characteristic 1) In the above-described camber molding apparatus, the chain has a contact portion that comes into contact with one surface of the plate material, and the contact portion has a width in a third direction orthogonal to the first direction and the second direction. You may have. According to such a structure, since the contact area of a chain and a board | plate material can be ensured, it becomes easy to give a camber shape to a board | plate material.

(Characteristic 2) In said camber shaping | molding apparatus, the press means may have a wire which contacts the other surface of a board | plate material, and a wire winding apparatus which winds up a wire. Then, the wire winding device winds the wire in a state in which the plate material is arranged so that one surface of the plate material contacts the chain spanned by the plurality of chain support portions, so that the wire is the other of the plate material. The plate material may be pressed against the surface of the chain. According to such a configuration, since the plate material is pressed against the chain using the wire, a pressing force corresponding to the shape of the chain (camber shape) can be easily applied to the plate material.

  A camber molding apparatus 10 according to an embodiment will be described with reference to the drawings. The camber molding apparatus 10 is used for manufacturing a leaf spring (a type of leaf spring) used in a leaf-type suspension installed in an automobile or the like. The camber shaping | molding apparatus 10 provides a camber shape to a board | plate material (processed product), and makes it a leaf | plate spring shape. The camber shape imparted to the plate material is appropriately designed according to the performance required for the leaf suspension.

  As shown in FIGS. 1 and 2, the camber molding apparatus 10 includes a base 12, a plurality of chain guides 14 provided on the base 12, and a cylinder 39 disposed to face the base 12. In the camber molding apparatus 10, a camber shape is imparted to the plate member 40 by the chain 22 spanned by the chain guide 14 and the wire 36 guided by the cylinder 39.

  The chain guide 14 is attached to a plurality of locations on the attachment surface 12a of the base 12 (the surface shown on the lower side in FIG. 1). Specifically, two chain guides 14 are arranged at the right end of the mounting surface 12a with a gap in the x direction, and two chain guides 14 are arranged at the center of the mounting surface 12a without a gap in the x direction, Two chain guides 14 are arranged at an interval in the x direction at the left end of the mounting surface 12a. A space is provided between the two chain guides 14 disposed at the right end and the two chain guides 14 disposed at the center, and the two chain guides 14 disposed at the center and the two chains disposed at the left end. A space is also formed between the guide 14.

  Each chain guide 14 includes a cylinder 16 and a piston 18 that moves forward and backward in the y direction with respect to the cylinder 16. The cylinder 16 protrudes from the mounting surface 12 a of the base 12 in the y direction (−). The piston 18 is attached to the cylinder 16 so as to be able to advance and retract in the y direction (−). Specifically, the piston 18 is connected to a servo motor (not shown). By driving the servo motor, the position of the piston 18 in the y direction with respect to the cylinder 16 is adjusted. A guide portion for guiding the chain 22 is formed at the tip of the piston 18. A chain 22 is stretched over the ends of the plurality of pistons 18 (chain guides 14).

  In the base 12, drums 20a and 20b are arranged. One end of the chain 22 is wound around the drum 20a, and the other end of the chain 22 is wound around the drum 20b. A motor 52 (shown in FIG. 3) for winding the chain 22 is connected to the rotating shaft of the drum 20a. When the drum 20a is driven by the motor 52, the chain 22 is wound around the drum 20a. That is, the drum 20a is a driving drum and the drum 20b is a driven drum. Tension is applied to the chain 22 by winding the chain 22 around the drum 20a. When tension is applied to the chain 22, the chain 22 can maintain its shape even if a force in the y direction acts on the chain 22.

  Here, the chain 22 is composed of plates 24 and 26 and support pins 28 as shown in FIGS. Through holes are formed at both ends of the plates 24 and 26. Support pins 28 are inserted into the through holes of the pair of plates 26, and both ends of the support pins 28 are rotatably supported by the through holes of the pair of plates 24. Thus, a pair of plates 26 is arranged between the pair of plates 24, and the pair of plates 24 and the pair of plates 26 are connected by the support pins 28. Further, the pair of plates 24 can rotate around the axis of the support pin 28 with respect to the pair of plates 26. As is apparent from FIG. 6, the chain 22 has a width W corresponding to the length of the support pin 28, and contacts the plate member 40 on the surface having the width W, as will be described later. Specifically, on the surface having the width W, the plate member 40 is contacted by the thickness of the plate 24 (or the thickness of the plate 26) × the number of the plates 24 (or the number of the plates 26). In this embodiment, the chain 22 in which the two plates (24, 24) and (26, 26) are arranged in the width W direction is used. However, the technique disclosed in this specification is in such a form. Not limited. For example, one, three, four, or more plates may be arranged in the width direction. By increasing or decreasing the number of plates arranged in the width direction, the contact area between the plate and the chain can be optimized.

  Note that wire guides 32 are attached to both ends of the attachment surface 12 a of the base 12. The wire guide 32 is disposed further outward than the chain guide 14 disposed at both ends. The wire guide 32 protrudes from the mounting surface 12a in the y direction (−). A guide portion for guiding the wire 36 is formed at the tip of the wire guide 32.

  As shown in FIGS. 1 and 2, a pair of cylinders 39 is disposed at a position facing the base 12. The cylinder 39 includes a tube 38b and a rod 38a attached to a piston (not shown). The cylinder 39 is attached to a frame (not shown) that is not shown. The rod 38a is attached to the tube 38b so as to be movable back and forth in the y direction (+). The rod 38a is driven by a hydraulic device (not shown) and presses the plate member 40 in the y direction (+) via the wire 36. A guide portion for guiding the wire 36 is formed at the tip of the rod 38a.

  The wire 36 is connected to a wire take-up device 54 (shown in FIG. 3) via a cylinder 39 and a guide roller 34. The guide rollers 34 are arranged on both sides of the wire guide 32 attached to the base 12. The guide roller 34 is provided so as to be movable back and forth in the y direction with respect to the base 12. A guide portion for guiding the wire 36 is formed on the guide roller 34. The guide roller 34 guides the wire 36 to the wire winding device 54. The wire winding device 54 is disposed on the base 12 side, and includes a pair of drums that winds the wire 36 and a motor that rotationally drives one of the pair of drums. By rotating the drum by a motor, the wire 36 is wound around the drum, and tension is applied to the wire 36.

  As shown in FIG. 3, the camber molding apparatus 10 includes a control device 50 that controls the above-described units 14, 52, 54, and 39. The control device 50 is configured by a computer including a CPU, a ROM, a RAM, and the like. The control device 50 controls each unit 14, 52, 54, 39 by executing a program stored in the ROM.

  An example of a procedure for imparting a camber shape to the plate member 40 using the above-described camber molding apparatus 10 will be described. In the present embodiment, a camber shape is imparted to the plate material 40 by using a quenching process when manufacturing the leaf spring. That is, when manufacturing a leaf spring, first, spring steel (for example, SUP6, SUP9, SUP9A, SUP11A, etc.) is processed into a plate material of a predetermined size, and machining (for example, drilling, rolling) is performed on the plate material. The eyeballs 42 and the like are formed by performing processing and the like, and a semi-finished product shape (hereinafter referred to as a plate material 40) is formed. In a present Example, the board | plate material 40 made into the semi-finished product shape is heated for a quenching process, a camber shape is provided in the heated state, and a quenching process is performed after that. In the present embodiment, since the camber shape is imparted to the plate material 40 heated by the heating before quenching, the heat treatment is not performed only for imparting the camber shape. The plate material 40 after quenching is subjected to processing such as tempering and shot peening. Then, paint is sprayed onto the surface to complete the leaf spring. Hereinafter, the operation of the camber molding apparatus 10 when a camber shape is imparted to the plate member 40 using the camber molding apparatus 10 will be described.

  First, as shown in FIG. 4, each chain guide 14 is driven to adjust the position of the tip of the piston 18 (position in the y direction) (S10). That is, the control device 50 moves the piston 18 of each chain guide 14 in the y direction with respect to the cylinder 16 according to the camber shape applied to the plate member 40. As a result, the shape of the chain 22 spanned over each chain guide 14 becomes a shape following the camber shape applied to the plate member 40. Next, the controller 50 drives the chain winding motor 52 to wind the chain 22 around the drum 20a (S12). As a result, tension is applied to the chain 22 and the chain 22 is bridged between the chain guides 14 without looseness. As a result, even if an external force in the y direction acts on the chain 22, the chain 22 can maintain its shape.

  Next, the plate material 40 is set in the camber molding apparatus 10 (S14). That is, the plate material 40 is set between the chain 22 spanned over the chain guide 14 and the wire 36 spanned between the guide rollers 34. As described above, the plate member 40 is heated for quenching and is at or above the quenching temperature. Therefore, the setting of the plate material 40 to the camber forming apparatus 10 is performed by a robot. As a result, the state shown in FIG. 1 is obtained.

  Next, the control device 50 drives the cylinder 39 to extend the rod 38a, and drives the wire winding device 52 to wind the wire 36 around the drum (S16). As a result, the wire 36 comes into contact with one surface (the lower surface in FIGS. 1 and 2) of the plate member 40, and a force that presses the plate member 40 toward the chain 22 acts on the plate member 40 from the wire 36. For this reason, the other surface (upper surface in FIGS. 1 and 2) of the plate member 40 contacts the chain 22, and a camber shape that follows the shape of the chain 22 is imparted to the plate member 40. As is clear from FIG. 6, the chain 22 has a width W in the short direction of the plate member 40, and a wide contact area with the plate member 40 is ensured. For this reason, the chain 22 can appropriately support the plate member 40 while the plate member 40 is bent. When the wire 36 presses the plate member 40 toward the chain 22, the guide roller 34 moves toward the base 12 and moves to the base 12 side from the tip of the wire guide 32 provided on the base 12. For this reason, in the state shown in FIG. 2, the wire 36 is guided to the guide roller 34 via the wire guide 32.

  When the camber shape is given to the plate material 40, the plate material 40 is taken out from the camber molding apparatus 10 (S18). Specifically, the control device 50 drives the cylinder 39 to retract the rod 38 a and takes out the plate material 40 from between the chain 22 and the wire 36. As a result, a camber shape is imparted to the plate member 40.

  As is clear from the above description, in the camber molding apparatus 10 of the present embodiment, the position of each chain guide 14 (the position of the piston 18 in the y direction) is adjusted, so that the chain 22 spanned over the chain guide 14 is adjusted. The shape can be adjusted. For this reason, the camber shaping | molding apparatus 10 can provide a some camber shape to a board | plate material. In addition, since the plate member 40 is supported by the chain 22, the chain guide 14 can be spaced apart in the longitudinal direction of the plate member 40. As a result, the number of chain guides 14 that require position adjustment can be reduced, and adjustment work when changing the camber shape can be performed in a short time.

  Finally, the correspondence between the examples and the claims will be described. The chain guide portion of the piston 18 is an example of a “chain support portion”, the chain guide 14 is an example of a “position adjusting mechanism”, and the wire 36, the cylinder 39, and the wire winding device 54 are examples of a “pressing means”. is there.

  As mentioned above, although the specific example of the technique disclosed by this specification was demonstrated in detail, these are only illustrations and do not limit a claim. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  For example, in the above-described embodiment, the shape of the chain 22 is adjusted by the six chain guides 14 so that a desired camber shape is given to the plate member 40, but the number of chain guides for adjusting the shape of the chain 22 is limited to six. It can be any number. In the above-described embodiment, the wire 36 is used to press the plate member 40 toward the chain 22. However, the configuration is not limited to such a configuration, and the configuration similar to that on the base 12 side (that is, chain guide + chain). May be used to press the plate. In addition, the chain 22 constituted by the plates 24 and 26 is used for forming the plate member 40. However, the chain 22 is not limited to such a form, and the chain is flexible and has a certain width. A scale may be used.

  The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

10: Camber molding device 12: Base 14: Chain guide 16: Cylinder 18: Piston 22: Chain 34: Guide roller 36: Wire 39: Cylinder 40: Plate material

Claims (3)

It is a camber molding device for giving a camber shape to a plate material to make a leaf spring,
Chain,
A plurality of chain support portions that are arranged at an interval in a first direction in which the chain extends, support the chain in a second direction across the chain and cross the first direction;
A position adjustment mechanism that is provided in each of the plurality of chain support parts and adjusts the position of the chain support part in the second direction;
Pressing means for pressing the plate material against the chain by contacting the other surface of the plate material when the plate material is arranged so that one surface of the plate material is in contact with the chain spanned by the plurality of chain support portions And a camber molding apparatus.   The chain has a contact portion that comes into contact with one surface of the plate member, and the contact portion has a width in a third direction orthogonal to the first direction and the second direction. Camber molding equipment. The pressing means has a wire that contacts the other surface of the plate material, and a wire winding device that winds the wire,
The wire winding device winds the wire in a state where the plate material is arranged so that one surface of the plate material contacts the chain spanned by the plurality of chain support portions, so that the wire becomes the other surface of the plate material. The camber molding apparatus according to claim 1, wherein the plate member is pressed against the chain and pressed against the chain.

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