JP5506710B2 - Element punching apparatus and method - Google Patents

Description

  The present invention relates to an element punching apparatus and method for punching a CVT belt element from a flat plate material.

  A CVT belt (belt used for a continuously variable transmission) is formed by arranging a number of metal elements aligned with each other on the entire circumference of a hoop that is a metal strip wound in a ring shape. . Since the CVT belt is stretched over the pulley and rotated, the rotation radius formed by arranging a large number of elements is the rotation radius by the inner peripheral side portion of the body portion positioned on the inner peripheral side of the hoop, and the outer peripheral side than that. It is necessary to make it smaller than the radius of rotation of the portion located at. Therefore, the element is formed by reducing the thickness of the inner peripheral side portion of the body portion as compared with other portions.

Conventionally, a long strip-like material used for punching an element has a thickness in a width direction position that forms an inner peripheral side portion of a body part smaller than a thickness of other general parts in advance (for example, (See Patent Documents 1 and 2).
Further, in Patent Document 3, for example, the cross-sectional shape of the material of the V block press (element) has a substantially uniform width at the outer peripheral portion, and gradually moves from a position away from the locking edge to the inner peripheral side by a predetermined distance toward the inner peripheral end. It is disclosed that the taper is formed to be inclined.

JP 2005-88025 A Japanese Patent No. 4390374 Japanese Patent No. 4132820

However, in Patent Document 2 as well, the long strip-shaped material used for punching out the V block press has a thickness in the width direction that forms the inner peripheral side portion of the body portion in advance toward the inner peripheral end. Inclined to form a taper.
Therefore, it is necessary to make the cross-sectional shape in the lateral direction of the long strip-like material in advance a step shape or a shape in which a straight portion and an inclined portion are formed, such as cost reduction of the strip-like material. Productivity was not excellent.

  The present invention has been made in view of such conventional problems, and can continuously perform the formation of the reduced thickness portion and the punching of the element, and can reduce the productivity such as cost reduction in the production of the flat plate material. It is an object of the present invention to provide an element punching apparatus and method that can be improved.

A first aspect of the present invention is a body portion disposed on the inner peripheral side of the CVT belt hoop, a head portion disposed on the outer peripheral side of the CVT belt hoop, and a neck portion that connects the head portion and the body portion at a central position. An element punching device for punching a CVT belt element constituted by a flat plate material,
A die formed with a punching blade having an opening shape along the planar shape of the element to be molded;
An ejector having a cross-sectional shape along the opening shape of the punching blade and disposed in the punching blade;
A punch that has a cross-sectional shape along the opening shape of the punching blade, descends into the punching blade, and punches the element together with the punching blade;
A pusher that is positioned around the punch and presses the flat plate material into the die,
The upper surface of the ejector is located on one side in the horizontal direction and located on the portion forming the body, and on the other side in the horizontal direction on the portion forming the head and neck. And a head side upper surface portion to be formed,
In the portion located on the one side in the lateral direction in the upper surface portion on the trunk portion side, a height rising surface is formed higher than the portion located on the other side in the lateral direction,
The flat plate material is pressed by the lowered punch and the ejector to form a reduced thickness portion on the flat plate material by the upper part on the body side, and then the flat material is formed by the lowered pusher. In the element punching device, the element is punched out by the punch and the punching blade after the element is pressed into the die.

2nd invention is the trunk | drum which arrange | positions the trunk | drum arrange | positioned in the inner peripheral side of the hoop for CVT belts, the outer peripheral side of the said hoop for CVT belts, and this head and the said trunk | drum in a center position. An element punching method for punching a CVT belt element constituted by a flat material,
A die formed with a punching blade having an opening shape along the planar shape of the element to be molded;
An ejector having a cross-sectional shape along the opening shape of the punching blade and disposed in the punching blade;
A punch that has a cross-sectional shape along the opening shape of the punching blade, descends into the punching blade, and punches the element together with the punching blade;
A pusher that is positioned around the punch and presses the flat plate material into the die,
The upper surface of the ejector is located on one side in the horizontal direction and located on the portion forming the body, and on the other side in the horizontal direction on the portion forming the head and neck. Forming a head-side upper surface portion,
In the portion located on one side in the lateral direction in the upper surface portion on the trunk portion side, a height rising surface is formed higher than the portion located on the other side in the lateral direction,
The flat plate material is pressed by the lowered punch and the ejector to form a reduced thickness portion on the flat plate material by the upper part on the body side, and then the flat material is formed by the lowered pusher. After the element is pressed into the die, the element is punched out by the punch and the punching blade (Claim 4).

In the element punching device according to the first aspect of the invention, the shape of the upper surface of the ejector is devised to form a reduced thickness portion that is a portion where the thickness is reduced compared to the general portion, and to punch the planar shape of the element. It is configured to be performed continuously.
Specifically, the upper surface of the ejector is formed with an upper surface portion on the trunk side and an upper surface portion on the head side, and the portion located on one side in the horizontal direction on the upper surface portion on the trunk portion is positioned on the other side in the horizontal direction. The height rising surface is formed higher than the portion to be.

As a result, when the flat plate material is pressed by the punch and the ejector, the thickness reducing portion where the thickness of the flat plate material is reduced compared to the general portion is reduced by the upper surface portion on the body side. Can be formed. Then, the flat plate material is pressed into the die by the pusher, and the element can be punched out by the punch and the punching blade in succession to the formation of the reduced thickness portion.
Therefore, in one element punching device, the formation of the thickness reducing portion as the thickness changing portion and the punching of the element can be continuously performed. And as a flat material, what has a substantially uniform thickness can be used as a whole, and productivity such as cost reduction for production of the flat material can be improved.

Further, when forming the reduced thickness portion, the periphery of the punch is not pressed down by the pusher. Thereby, a part of flat plate-like material which is pressurized and flows when forming the reduced thickness portion can easily flow in the lateral direction located around the punch. Therefore, the thickness reduction part can be formed without giving an excessive load to the die.
In addition, the said horizontal direction one side means the one side of the direction orthogonal to the direction where a punch and a pusher descend. The other side in the horizontal direction refers to the side opposite to the one side in the horizontal direction.

  In addition, also by the element punching method of the second invention, the formation of the reduced thickness portion as the thickness changing portion and the punching of the element can be continuously performed. And as a flat material, what has a substantially uniform thickness can be used as a whole, and productivity such as cost reduction for production of the flat material can be improved. Further, similarly to the above, a part of the flat plate material can easily flow in the lateral direction, and the reduced thickness portion can be formed without applying an excessive load to the die.

Sectional drawing which shows the element punching apparatus which has a punch and a pusher in an original position in an Example. Sectional drawing which shows an element punching apparatus when a punch descend | falls in an Example. Sectional drawing which shows the element punching apparatus in the state in which the thickness reduction part in the Example was formed. Sectional drawing which shows an element punching apparatus when a pusher descend | falls in an Example. Sectional drawing which shows the element punching apparatus in the state in which the positioning part in the Example was formed. Sectional drawing which shows the element punching apparatus of the state which punched the element in an Example. Sectional drawing which shows the ejector in an Example. The top view which shows typically the state which pierces a some element from the elongate strip | belt-shaped raw material in an Example. The perspective view which shows the element in an Example. The side view which shows the state which laminated | stacked several elements in the Example. The perspective view which shows the CVT belt formed using the element and hoop in an Example.

A preferred embodiment of the element punching apparatus and method of the first and second inventions described above will be described.
1st invention WHEREIN: The said height raising surface is formed in the state which becomes high as it goes to the said horizontal direction one side, and the said thickness reduction | decrease part becomes thick as it goes to the said horizontal direction one side. It is preferable to form in a small state (claim 2).
In the second invention, the height increasing surface is formed in a state of becoming higher as it goes toward the one side in the lateral direction, and the thickness reducing portion has a thickness as it goes toward the one side in the horizontal direction. It is preferable to form in a small state (claim 5).
In these cases, when forming the thickness reducing portion, a part of the flat plate-like material can be more easily flowed to one side in the lateral direction. For this reason, the formation of the reduced thickness portion can be facilitated.

In the first aspect of the present invention, a portion of the upper surface on the head side located on the other side in the lateral direction is formed with a height lowering surface that decreases toward the other side in the lateral direction, When the ejector is tilted so that the one side in the lateral direction is lowered within the gap between the punching blades when the side upper surface portion contacts the lower surface of the flat plate-like material, the height lowering surface becomes the flat plate shape. It is preferable to be configured to face the lower surface of the material (Claim 3).
In the second aspect of the present invention, a portion of the head-side upper surface located on the other side in the lateral direction is formed with a height lowering surface that becomes lower toward the other side in the lateral direction. When the ejector is tilted so that the one side in the lateral direction is lowered in the gap between the punching blades when the side upper surface portion contacts the lower surface of the flat plate-like material, the height-decreasing surface is set to the flat plate-like shape. It is preferable to face the lower surface of the material (claim 6).

  In these cases, when the ejector is tilted so that one side in the lateral direction is lowered in the gap between the punching blade when the upper surface of the body side of the ejector contacts the lower surface of the flat plate material, It is possible to prevent the corner portion located at the end portion on the other side in the lateral direction on the side upper surface portion from coming into contact with the lower surface of the flat plate material and changing the thickness of the head portion of the element.

2nd invention WHEREIN: The said flat material is a long strip | belt-shaped material supplied continuously between the said die | dye and the said ejector, the said punch, and the said pusher, The said element is the width | variety of the said long strip | belt-shaped material. It is preferable that the long band-shaped material used for forming the thickness reduction portion is partially released to the outer end portion in the width direction by punching in two rows with the head facing inward in the direction. ).
In this case, when the corner portion on one side in the horizontal direction on the height increasing surface of the upper surface portion of the trunk portion presses the lower surface of the long strip material to form the thickness reduction portion, one of the long strip materials is formed. The portion can easily flow to the outer end portion in the width direction (end portion on one side in the horizontal direction).

Embodiments of an element punching apparatus and method according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 9, the element punching device 1 of this example includes a body portion 71 disposed on the inner peripheral side of the CVT belt hoop 81, and a head portion 72 disposed on the outer peripheral side of the CVT belt hoop 81. The CVT belt element 7 constituted by the neck portion 73 that connects the head portion 72 and the body portion 71 at the center position is punched out from the flat plate material 70.
As shown in FIGS. 1 and 6, the element punching device 1 includes a die 2 having a punching blade 21 having an opening shape along the planar shape of the element 7 to be molded, and a cross-sectional shape along the opening shape of the punching blade 21. An ejector 3 disposed in the punching blade 21, a punch 4 having a cross-sectional shape along the opening shape of the punching blade 21, descending into the punching blade 21, and punching the element 7 together with the punching blade 21, And a pusher 5 which is positioned around the punch 4 and presses the flat plate material 70 into the die 2.

As shown in FIG. 1, the upper surface 30 of the ejector 3 includes a body-side upper surface portion 31 that is located in a portion on the one side W <b> 1 in the horizontal direction and that forms the body portion 71, and 72 and a head-side upper surface portion 32 positioned at a portion forming the neck portion 73. A height rising surface 311 that increases in the direction toward the one side W1 in the horizontal direction is formed in the portion located on the one side W1 in the horizontal direction in the upper surface portion 31 on the trunk side.
Here, the one side W1 in the horizontal direction refers to one side in the direction orthogonal to the direction in which the punch 4 and the pusher 5 descend. Further, the other side W2 in the horizontal direction refers to the side opposite to the one side W1 in the horizontal direction.

  As shown in FIGS. 2 and 3, the element punching device 1 presses the flat plate material 70 by the lowered punch 4 and the ejector 3, and horizontally moves to the lower surface 701 of the flat plate material 70 by the body side upper surface portion 31. A thickness reducing portion 711 whose thickness decreases toward the one side W1 in the direction is formed, and then, as shown in FIG. 4, the flat plate material 70 is pressed into the die 2 by the lowered pusher 5, and then, as shown in FIG. As shown, the element 7 is punched by the punch 4 and the punching blade 21.

Hereinafter, the element punching apparatus 1 and method of this example will be described in detail with reference to FIGS.
Here, FIGS. 1 to 6 are cross-sectional views schematically showing the element punching device 1 as seen from the feeding direction of the flat plate material 70.
The element punching device 1 of this example is configured to continuously perform the formation of the thickness reducing portion 711 that is a portion where the thickness has changed compared to the general portion 710 and the planar punching of the element 7 (see FIG. 9).

As shown in FIGS. 1 and 8, the flat plate material 70 of this example is a long strip material 70 that is continuously supplied between the die 2 and the ejector 3 and the punch 4 and the pusher 5. The long strip-shaped material 70 is configured to sequentially feed out the element 7 from the material body wound in a spiral shape between the die 2 and the ejector 3 and the punch 4 and the pusher 5 at a predetermined interval.
The element punching device 1 of this example is configured to punch the elements 7 in two rows with the head 72 facing the inner side in the width direction W of the long band-shaped material 70. In the element punching device 1, as shown in FIG. 3, a part of the long belt-like material 70 is partially released to the outer end in the width direction W to form a thickness reduction portion 711.

As shown in FIG. 9, in the element 7, the head 72 is formed in a substantially triangular shape whose width becomes narrower toward the side away from the body 71, and the body 71 is directed toward the side away from the head 72. Thus, it is formed in a substantially trapezoidal shape with a slightly narrower width. On both sides of the neck portion 73, gaps 79 are formed between the head portion 72 and the trunk portion 71, and CVT belt hoops 81 are disposed in the gaps 79, respectively. The hoop 81 is formed by laminating a plurality of ring-shaped steel plates.
As shown in FIG. 11, a CVT belt 8 is configured by arranging a large number of frictional elements 7 along the entire circumference of the CVT belt hoop 81. The CVT belt 8 is stretched between a pair of pulleys and used for a continuously variable transmission (belt type CVT (Continuously Variable Transmission)).

As shown in FIGS. 9 and 10, a positioning portion 721 for positioning with the adjacent element 7 is formed at the center position in the left-right direction of the head 72 of the element 7 when stacked on the entire circumference of the hoop 81. It is. The positioning portion 721 is positioned in the element 7 such that the positioning projection 722 protrudes from the taper-forming plane 701A on which the taper surface 712 of the thickness reduction portion 711 is formed and the flat surface 702A that is opposite to the taper-forming plane 701 is depressed. And a recess 723. The taper forming plane 701 </ b> A is a surface formed from the lower surface 701 of the flat plate material 70 sent to the element punching device 1.
The flat surface 702A of the adjacent element 7 is opposed to the taper-forming plane 701A of each element 7, and the positioning protrusion on the taper-forming plane 701A of the adjacent element 7 is opposed to the positioning recess 723 in the flat plane 702A of each element 7. By inserting the part 722, the mutual positioning of the elements 7 is performed.

  As shown in FIG. 7, the height increasing surface 311 of this example is formed as a tapered surface that becomes higher toward the one side W <b> 1 in the horizontal direction. The inclination angle θ1 of the height rising surface 311 can be set to, for example, 3 to 6 ° with respect to the horizontal direction (horizontal direction). The height raising surface 311 can be, for example, a curved (curved) tapered surface in addition to the linear tapered surface 712. Further, the height increasing surface 311 can be formed in a stepped shape in which the flat surface located on the one side W1 in the lateral direction is higher than the flat surface located on the other side W2 in the trunk side upper surface portion 31. .

  In the ejector 3, a portion of the head-side upper surface portion 32 located on the other lateral side W <b> 2 is formed with a height lowering surface 321 that becomes lower toward the other lateral side W <b> 2. The inclination angle θ2 of the height lowering surface 321 can be set to, for example, 0.2 to 0.8 ° with respect to the lateral direction (horizontal direction). In the element punching device 1, the ejector 3 is arranged so that one side W <b> 1 in the lateral direction is lowered in the gap S between the punching blade 21 when the trunk-side upper surface portion 31 comes into contact with the lower surface 701 of the long strip-shaped material 70. When inclined, the height lowering surface 321 is configured to face the lower surface 701 of the long belt-shaped material 70.

  By forming the height lowering surface 321, the boundary portion between the thickness reducing portion 711 of the trunk portion 71 and the other general portion 710 is made larger than the thickness of the head portion 72 and the neck portion 73, and this boundary portion In addition, an edge having a maximum thickness (a corner portion formed between the tapered surface of the thickness reducing portion 711 and the flat surface of the general portion 710) can be formed. On the other hand, without forming this edge, the thickness of the boundary portion can be the same as the thickness of the head 72 and the neck 73 (see FIG. 9).

As shown in FIG. 1, a protrusion-forming depression 322 for forming the positioning protrusion 722 is formed on the head-side upper surface 32 of the upper surface 30 of the ejector 3, and the protrusion-forming depression 322. A lower arrangement hole 323 in which the knockout pin 33 is arranged is formed in the lower part of the above.
In the punch 4, an upper arrangement hole 41 is formed at a position facing the upper side of the knockout pin 33, and a positioning recess 723 is formed in the upper arrangement hole 41 by pressing the upper surface 702 of the long strip-shaped material 70. A punch pin 42 is provided for this purpose.

In the element punching device 1 of this example, the punch 4 and the pusher 5 are lowered to form the thickness reducing portion 711, then the punch pin 42 is lowered to form the positioning portion 721, and then the punch 4 is further lowered. The element 7 is configured to be punched out.
The ejector 3 receives an upward pressing force, and is configured to be pushed down by a punch 4 that receives a pressing force larger than the pressing force.

Next, a method of punching the element 7 from the long strip plate material using the element punching device 1 will be described.
As shown in FIG. 1, the long strip-shaped material 70 is constantly supplied to a gap formed between the die 2 and the ejector 3 and the punch 4 and the pusher 5.
In forming the element 7, the punch 4 is lowered. As shown in FIG. 2, when the long belt-shaped material 70 is pushed downward by the punch 4, the height increasing surface 311 of the body-side upper surface portion 31 of the upper surface 30 of the ejector 3 is placed on the lower surface 701 of the long belt-shaped material 70. The upper end corner 312 on one side W1 in the horizontal direction comes into contact. At this time, in the ejector 3, when the height increasing surface 311 is pushed by the long belt-shaped material 70, the lateral one side W <b> 1 with the height increasing surface 311 is lowered in the gap S between the punching blade 21. Tilt. Further, the long belt-like material 70 is also slightly deformed by being pushed by the height rising surface 311.

  At this time, the height lowering surface 321 is formed on the head-side upper surface portion 32 of the upper surface 30 of the ejector 3, so that the corner portion 324 on the other lateral side W <b> 2 of the ejector 3 is The height lowering surface 321 can be made to face the lower surface 701 of the long strip-shaped material 70 without contacting the lower surface 701. Thereby, the formation position of the head 72 in the long belt-shaped material 70 is not deformed by the corner portion 324 on the other side W2 in the lateral direction, and the thickness of the head 72 of the element 7 to be molded is prevented from changing. Can do.

Then, as shown in FIG. 3, the long band-shaped material 70 is pressurized by the punch 4 and the ejector 3, and a taper surface is formed on the lower surface 701 of the long band-shaped material 70 by the height rising surface 311 of the body-side upper surface portion 31. 712 is formed. In the long strip-shaped material 70, the formation of the tapered surface 712 forms a thickness reduction portion 711 that decreases in thickness toward the one side W1 in the horizontal direction.
At this time, a part 74 of the long belt-shaped material 70 that is pushed and crushed by the height rising surface 311 may be caused to flow so as to escape to the outer end in the width direction W (the end on the one side W1 in the lateral direction). it can. Thereby, the long strip | belt-shaped raw material 70 at the time of forming the thickness reduction part 711 can be smoothly flowed, and the thickness reduction part 711 can be formed easily.

Next, as shown in FIG. 4, after pressurizing the long strip material 70 with the punch 4, the long strip material 70 is pressed onto the upper surface 30 of the die 2 by the pusher 5. Note that the lower surface of the pusher 5 is positioned above the lower surface of the punch 4, and the pusher 5 can be lowered as the punch 4 is lowered. In this case, after pressurizing with the punch 4, the pusher 5 can be further lowered to press the long strip-shaped material 70 against the die 2.
Next, as shown in FIG. 5, the punch pin 42 is lowered. Then, a part of the long belt-like material 70 pressed downward by the punch pins 42 flows so as to be pushed down into the protrusion forming recess 322 in the ejector 3. As a result, a positioning recess 723 is formed on the upper surface 702 of the long band-shaped material 70, and a positioning projection 722 is formed on the lower surface 701 of the long band-shaped material 70.

Next, as shown in FIG. 6, the punch 4 is further lowered. At this time, since the pressing force by the punch 4 is larger than the pressing force by the ejector 3, the ejector 3 is moved down with respect to the die 2 and the pusher 5 as the punch 4 is lowered, and the punching blades of the punch 4 and the die 2 are punched. 21, the element 7 is punched from the long belt-shaped material 70.
Thereafter, the punch 4 and the ejector 3 are raised to predetermined positions, and the knockout pin 33 is raised, whereby the element 7 after molding can be taken out from the element punching device 1.

As described above, in this example, the formation of the thickness reducing portion 711 as the thickness changing portion and the punching of the element 7 can be continuously performed in one element punching device 1. The element 7 including the head portion 72 having the positioning portion 721, the neck portion 73, and the body portion 71 having the thickness reduction portion 711 can be formed in a short time by the downward movement of the punch 4 by one stroke.
In addition, a material having a substantially uniform thickness can be used as the long band-shaped material 70, and productivity such as cost reduction for the production of the long band-shaped material 70 can be improved.

  Furthermore, when the thickness reducing portion 711 is formed, the periphery of the punch 4 is not pressed down by the pusher 5. Thereby, a part of the long belt-shaped material 70 that is pressurized and flows when the thickness reducing portion 711 is formed can easily flow to the lateral one side W <b> 1 located around the punch 4. Therefore, the thickness reducing portion 711 can be formed without applying an excessive load to the die 2.

DESCRIPTION OF SYMBOLS 1 Element punching apparatus 2 Dies 21 Punching blade 3 Ejector 30 Upper surface 31 Body side upper surface part 311 Height raising surface 32 Head side upper surface part 321 Height lowering surface 4 Punch 5 Pusher 7 Element for CVT belt 70 Flat material (long Shaft strip material)
71 Body 711 Thickness reduction part 72 Head 73 Neck 8 CVT belt 81 Hoop for CVT belt W Width direction W1 One side in the horizontal direction W2 The other side in the horizontal direction

Claims (7)

It is comprised by the trunk | drum arrange | positioned at the inner peripheral side of the hoop for CVT belts, the head arrange | positioned at the outer peripheral side of the said hoop for CVT belts, and the neck part which connects this head part and the said trunk | drum in a center position. An element punching device for punching a CVT belt element from a flat plate material,
A die formed with a punching blade having an opening shape along the planar shape of the element to be molded;
An ejector having a cross-sectional shape along the opening shape of the punching blade and disposed in the punching blade;
A punch that has a cross-sectional shape along the opening shape of the punching blade, descends into the punching blade, and punches the element together with the punching blade;
A pusher that is positioned around the punch and presses the flat plate material into the die,
The upper surface of the ejector is located on one side in the horizontal direction and located on the portion forming the body, and on the other side in the horizontal direction on the portion forming the head and neck. And a head side upper surface portion to be formed,
In the portion located on the one side in the lateral direction in the upper surface portion on the trunk portion side, a height rising surface is formed higher than the portion located on the other side in the lateral direction,
The flat plate material is pressed by the lowered punch and the ejector to form a reduced thickness portion on the flat plate material by the upper part on the body side, and then the flat material is formed by the lowered pusher. An element punching device, wherein the element is punched by the punch and the punching blade after the die is pressed into the die. The element punching device according to claim 1, wherein the height increasing surface is formed in a state of becoming higher toward the one side in the lateral direction,
The element punching device according to claim 1, wherein the thickness reducing portion is formed in a state where the thickness is reduced toward the one side in the horizontal direction. 3. The element punching device according to claim 1, wherein a height lowering surface that is lowered toward the other side in the lateral direction is formed in the portion located on the other side in the lateral direction in the upper surface portion on the head side. And
When the ejector is tilted so that the one side in the lateral direction is lowered in the gap between the punching blades when the upper surface of the body portion is in contact with the lower surface of the flat plate material, the height lowering surface is An element punching device configured to face the lower surface of the flat plate material. It is comprised by the trunk | drum arrange | positioned at the inner peripheral side of the hoop for CVT belts, the head arrange | positioned at the outer peripheral side of the said hoop for CVT belts, and the neck part which connects this head part and the said trunk | drum in a center position. An element punching method for punching a CVT belt element from a flat plate material,
A die formed with a punching blade having an opening shape along the planar shape of the element to be molded;
An ejector having a cross-sectional shape along the opening shape of the punching blade and disposed in the punching blade;
A punch that has a cross-sectional shape along the opening shape of the punching blade, descends into the punching blade, and punches the element together with the punching blade;
A pusher that is positioned around the punch and presses the flat plate material into the die,
The upper surface of the ejector is located on one side in the horizontal direction and located on the portion forming the body, and on the other side in the horizontal direction on the portion forming the head and neck. Forming a head-side upper surface portion,
In the portion located on one side in the lateral direction in the upper surface portion on the trunk portion side, a height rising surface is formed higher than the portion located on the other side in the lateral direction,
The flat plate material is pressed by the lowered punch and the ejector to form a reduced thickness portion on the flat plate material by the upper part on the body side, and then the flat material is formed by the lowered pusher. The element punching method is characterized by punching the element into the die and then punching the element with the punch and the punching blade. The element punching method according to claim 4, wherein the height increasing surface is formed in a state of becoming higher toward the one side in the lateral direction,
The element punching device according to claim 1, wherein the thickness reducing portion is formed in a state where the thickness is reduced toward the one side in the horizontal direction. 6. The element punching method according to claim 4, wherein a height lowering surface that is lowered toward the other side in the lateral direction is formed in a portion located on the other side in the lateral direction in the upper surface portion on the head side. Aside,
When the ejector is tilted so that the one side in the lateral direction is lowered in the gap between the punching blades when the upper surface portion on the body side contacts the lower surface of the flat plate-like material, the height lowering surface is An element punching method, wherein the element is made to face the lower surface of the flat plate material. The element punching method according to any one of claims 4 to 6, wherein the flat plate material is a long strip material that is continuously supplied between the die and the ejector and the punch and the pusher. ,
The element is punched in two rows with the head facing inward in the width direction of the long band-shaped material, and the long band-shaped material when forming the thickness reduction portion is partially outside the width direction. Element punching method characterized by letting escape to the end.

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