JP5577353B2 - Workpiece punching manufacturing method - Google Patents

Description

  The present invention relates to a workpiece punching manufacturing method in which a long continuous metal plate material is used as a raw material and a workpiece is manufactured from the raw material.

  For example, an element constituting a belt for a continuously variable transmission (CVT) includes a body having a V surface in contact with a pulley of a continuously variable transmission, and a head connected to the upper portion of the body via a neck. Yes. The head is provided with ears protruding on both sides of the head so as to face the upper edge of the body, and a recess is formed between the ears located on both sides of the neck and the body. In addition, a thin-walled portion whose plate thickness gradually decreases toward the lower edge is formed in the substantially lower half of the body.

  Normally, a plurality of elements are annularly stacked, and the endless ring in the form of a metal band is attached to the concave portion, thereby being bound in an annular shape. At this time, the body is positioned on the inner peripheral side of the belt, and the head is positioned on the outer peripheral side of the belt.

  The element is formed by punching with a forming punch in a state in which the metal plate material is placed on a die of a press device, using a long continuous metal plate material as a raw material. Then, hundreds of the punched elements are stacked in an annular shape, and an endless ring is attached to the recess, thereby assembling a continuously variable transmission belt.

  As a technique of this type, for example, a method for manufacturing an element of a continuously variable transmission belt disclosed in Japanese Patent Application Laid-Open No. 2004-141887 is known. In this manufacturing method, as shown in FIG. 5, a processing station A to a processing station H are provided, and while the strip-shaped strip 1 is conveyed in the direction of arrow L, the processing station A to the processing station H Desired processing is performed.

  For example, in the processing station A, the pilot hole 2 for feeding the strip 1 is formed, and in the processing station C, the outer unnecessary portion 4 of the element 3 to be finally punched is punched. In the processing station D, coining is performed, while in the processing station E, shaving is performed. Finally, at the processing station H, the element 3 is separated from the strip 1 by punching.

  In the above Japanese Patent Application Laid-Open No. 2004-141887, the pilot hole 2 is formed in the strip 1 at the processing station A. By inserting positioning conveyance pins (not shown) into the pilot holes 2, the strips 1 are intermittently conveyed sequentially in the direction of the arrow L. In the processing station B to the processing station H, the strip material 1 is subjected to a predetermined processing process, for example, a crushing process such as coining.

  However, in the crushing process, material flow tends to occur in the strip 1. For this reason, the pilot hole 2 is deformed, and the positioning accuracy by the pilot hole 2 may be lowered. Thereby, the variation of the processing quality of the element 3 which is a product becomes large.

  The present invention solves this type of problem, and provides a workpiece punching and manufacturing method capable of easily and reliably manufacturing a high-quality workpiece from a continuous metal plate material in a simple process. The purpose is to do.

  The present invention relates to a workpiece punching manufacturing method in which a long continuous metal plate material is used as a raw material and a workpiece is manufactured from the raw material.

  The present invention also relates to a method for punching and manufacturing a workpiece, which is an element of a belt for a continuously variable transmission, using a long continuous metal plate material as a raw material and manufacturing the workpiece from the raw material. .

  Furthermore, the present invention uses a long continuous metal plate material as a material, manufactures a workpiece from the material, the workpiece is an element of a continuously variable transmission belt, and the material is a fixed plate. The present invention relates to a method for punching and manufacturing a workpiece consisting of only a flat portion having a thickness.

In this manufacturing method, a pilot hole is formed in the material, a step of forming an opening around the pilot hole, and the material is sequentially transferred and positioned to a downstream station via the pilot hole. And a crushing process on the material transferred and positioned at the downstream station.

According to the present invention, the material has a pilot hole and an opening formed around the pilot hole. This opening includes, for example, circular slit, a straight slit or hole or the like.

  Accordingly, when the material is subjected to a crushing process, even if material flow occurs in the material, the material flow can be released (absorbed) by the opening. For this reason, it becomes possible to prevent reliably that a pilot hole deform | transforms at the time of a crushing process. Thereby, the pilot positioning accuracy can be maintained satisfactorily, and the workpiece, which is a product, can be manufactured with high quality and efficiency.

It is explanatory drawing of the element of the belt for continuously variable transmission which is the workpiece | work manufactured by the punching manufacturing method which concerns on embodiment of this invention. It is side surface explanatory drawing of the said element. It is a schematic explanatory drawing of the manufacturing system which implements the said punching manufacturing method. It is principal part explanatory drawing of the metal mold | die apparatus which comprises the said manufacturing system. It is explanatory drawing of the manufacturing method of the element of the belt for continuously variable transmission of Unexamined-Japanese-Patent No. 2004-141887.

  FIG. 1 shows an element 10 of a continuously variable transmission belt, which is an example of a workpiece manufactured by a punch manufacturing method according to an embodiment of the present invention.

  When the element 10 is laminated in a ring shape in the thickness direction to form a continuously variable transmission belt, the left and right end edges 12 are in contact with a pulley (not shown) of the continuously variable transmission and are arranged on the inner peripheral side. A body 14 is provided, and a head 18 is provided on the upper edge side of the central portion of the body 14 via a neck 16 and located on the outer peripheral side when a plurality of rings are laminated. In the substantially lower half of the body 14, there is provided a thin portion 20 that is formed thinner than the other portions.

  As shown in FIGS. 1 and 2, with regard to the head 18, the plate thickness C of the left and right side end portions 24 located on both the left and right sides with the adjacent upper region 22 sandwiched between the neck 16 is the upper region 22 adjacent to the neck 16. Is set to be larger than the thickness D (C> D). The plate thicknesses B and A of the neck 16 and the body 14 are set smaller than the plate thickness C of the left and right end portions 24 of the head 18. The plate thickness B is equal to or less than the plate thickness C.

  In a substantially upper half portion excluding the thin portion 20 of the body 14, the plate thickness A at the left and right end portions of the body 14 located on both sides of the lower region of the neck 16 is greater than the plate thickness B of the lower region of the neck 16. It is set smaller (C ≧ B> A).

  As shown in FIG. 3, the manufacturing system 30 that performs the punching manufacturing method according to the present embodiment includes a first processing station 32, a second processing station 34, and a third processing along the arrow L direction that is the material transport direction. A station 36 and a fourth processing station 38 are arranged.

  In the manufacturing system 30, a long continuous metal plate material is used as the material 40, and the element 10 is manufactured from the material 40, and the material 40 includes only a flat portion having a certain plate thickness.

  The first processing station 32 forms a pilot hole 42 that is a piercing hole in the material 40, and forms an opening, for example, four arc-shaped slits 44 around the pilot hole 42. Note that the opening may be a plurality of linear slits, a plurality of holes, or the like instead of the arc-shaped slit 44.

  In the second processing station 34, punching is performed by punching out the unnecessary outer portion 46 of the element 10 from the material 40. In the third processing station 36, a mold apparatus 50 shown in FIG. 4 is used.

  The mold apparatus 50 includes a die 52 and a punch 54, and holes 58 and 60 through which positioning pins 56 are inserted are formed in the die 52 and the punch 54. The punch 54 is pressed to the die 52 side through an actuator (not shown), and a crushing process corresponding to the shape of the element 10 is performed on the material 40 by the punch 54 and the molding surface 52 a of the die 52. The fourth processing station 38 performs a punching process for separating the element 10 from the material 40.

  Next, a punching manufacturing method for manufacturing the element 10 from the material 40 in the manufacturing system 30 will be described below.

  As shown in FIG. 3, the material 40 is conveyed in the direction of arrow L via a conveyance device (not shown), and is first arranged at the first processing station 32. In the first processing station 32, the material 40 is formed with a pilot hole 42 and a plurality of arc-shaped slits 44 that go around the pilot hole 42.

  Next, the material 40 is transported in the direction of the arrow L and placed at the second processing station 34. At that time, the material 40 is conveyed and positioned at a desired position of the second processing station 34 under the action of a positioning conveyance pin (not shown) inserted into the pilot hole 42. In the second processing station 34, a removal process for removing the unnecessary outer portion 46 of the element 10 is performed.

  Further, the material 40 is conveyed to the third processing station 36 through the pilot hole 42. In the third processing station 36, for example, as shown in FIG. 4, the punch 54 constituting the mold apparatus 50 is pressed toward the die 52 side. As a result, the material 40 is subjected to a crushing process corresponding to the shape of the element 10 via the molding surface 52 a of the die 52 and the punch 54.

  In this case, in the present embodiment, the material 40 is formed with a pilot hole 42 and a plurality of arc-shaped slits 44 around the pilot hole 42. For this reason, the material flow (refer to the arrow in FIG. 4) generated in the raw material 40 during the crushing process by the mold apparatus 50 can be released (absorbed) by the plurality of slits 44. Accordingly, it is possible to reliably prevent the pilot hole 42 from being deformed during the crushing process.

  Thereby, the positioning accuracy of the raw material 40 can be maintained satisfactorily through the pilot holes 42, and the product element 10 can be manufactured with high quality and efficiency.

  Moreover, in the present embodiment, the positioning pin 56 is inserted into the pilot hole 42 during the crushing process by the mold apparatus 50. Therefore, even if material flow occurs in the raw material 40 during the crushing processing by the mold apparatus 50, the deformation of the pilot hole 42 can be suppressed more reliably.

  Actually, the deviation of the conveyance pitch of the material 40 was detected by the conventional method in which only the pilot holes 42 were provided and the present embodiment in which the plurality of slits 44 were formed around the pilot holes 42. As a result, in this embodiment, the shift of the transport pitch is reduced to 50% or less compared to the conventional method.

  Further, in the element 10 manufactured in the present embodiment, when a continuously variable transmission belt is formed by arranging a plurality of annular shapes, the curved deformation toward the inner peripheral side of the continuously variable transmission belt is smoothly performed. Done. For this reason, the lamination direction of each element 10 does not bend to the head 18 side, and a favorable lamination shape can be obtained.

  Then, when the continuously variable transmission belt is formed and hung on the pulley of the continuously variable transmission, it is possible to prevent the continuously variable transmission belt from swinging in the outer circumferential direction. Therefore, damage to the endless ring and the element 10 is avoided, and stable power transmission in the continuously variable transmission can be performed.

  Moreover, when the plurality of elements 10 are stacked in a ring shape, the relatively thick portions, that is, the three portions of the left and right end portions 24 of the head 18 and the lower region of the neck 16 in the body 14 are adjacent to each other. To touch. For this reason, it is possible to maintain an extremely stable laminated state, and when forming a continuously variable transmission belt, it is possible to prevent meandering and transmit power efficiently.

  Furthermore, as shown in FIG. 2, the plate thickness A at the left and right end portions of the body 14 is set smaller than the plate thickness B at the lower region of the neck 16, while the plate thickness C at the left and right end portions 24 is set. Also, the plate thickness B of the lower region is equal to or less. Thereby, when the continuously variable transmission belt is formed by laminating a plurality of elements 10 in an annular shape, a stable lamination state can be achieved by contact between the left and right end portions 24 and the lower region.

  In addition, since each element 10 is reliably prevented from bending so as to converge toward the head 18, the element 10 is caused by unnecessary contact with the endless ring when hung on the pulley of the continuously variable transmission. Thus, stable power transmission in the continuously variable transmission can be performed without any damage.

  In addition, although this embodiment demonstrated the case where the element 10 of the belt for continuously variable transmissions was manufactured as a workpiece | work, it is not limited to this. For example, as the material 40, materials having various shapes can be used in addition to a material having only a flat portion having a certain thickness. Furthermore, any work can be used as long as it can manufacture a work using a metal plate material as a raw material, and can be applied to various works other than the element 10.

Claims (9)

A method of punching and manufacturing a workpiece, in which a long continuous metal plate material is a material (40), and a workpiece is manufactured from the material (40),
Forming a pilot hole (42) in the material (40) and forming an opening (44) around the pilot hole (42);
Sequentially transferring and positioning the material (40) through the pilot hole (42) to a downstream station;
Crushing the material (40) transferred and positioned to the downstream station;
A method for punching and manufacturing a workpiece characterized by comprising:   The punching manufacturing method according to claim 1, wherein a positioning pin (56) is inserted into the pilot hole (42) when the crushing process is performed on the material (40). Production method.   The punching manufacturing method according to claim 1 or 2, wherein the opening (44) is a plurality of slits or a plurality of holes. A long continuous metal plate material is used as a raw material (40), and a workpiece is manufactured from the raw material (40). There,
Forming a pilot hole (42) in the material (40) and forming an opening (44) around the pilot hole (42);
Sequentially transferring and positioning the material (40) through the pilot hole (42) to a downstream station;
The transport and the positioning has been the material (40) to the downstream station, a step of performing crushing processing,
A method for punching and manufacturing a workpiece characterized by comprising:   The punching manufacturing method according to claim 4, wherein the opening (44) is a plurality of slits or a plurality of holes. In the punching method according to claim 4, wherein, when performing the processing before tight rude to the material (40), wherein the pilot hole (42), characterized in that the positioning pin (56) is inserted workpiece Punching manufacturing method. A long continuous metal plate is used as a material (40), and a workpiece is manufactured from the material (40). The workpiece is an element (10) of a continuously variable transmission belt, and the material (40 ) Is a method for punching and manufacturing a workpiece consisting only of a flat portion having a certain plate thickness,
Forming a pilot hole (42) in the material (40) and forming an opening (44) around the pilot hole (42);
Sequentially transferring and positioning the material (40) through the pilot hole (42) to a downstream station;
The transport and the positioning has been the material (40) to the downstream station, a step of performing crushing processing,
A method for punching and manufacturing a workpiece characterized by comprising:   The punching manufacturing method according to claim 7, wherein the opening (44) is a plurality of slits or a plurality of holes. In the punching method of claim 7, wherein, when performing the processing before tight rude to the material (40), wherein the pilot hole (42), characterized in that the positioning pin (56) is inserted workpiece Punching manufacturing method.

Images